KR20050018815A - Apparatus and method for controlling car side mirror - Google Patents

Abstract

A predetermined time difference is set at the time of starting to tilt the left and right side mirrors so that the noise pulse signal is generated after the pulse signal generation by the inertia rotation of one motor is finished.

Description

Control device and control method of vehicle side mirrors {APPARATUS AND METHOD FOR CONTROLLING CAR SIDE MIRROR}

The present invention relates to a control apparatus and a control method of a vehicle side mirror.

In general, when reversing the car, the driver operates the car while checking the rear with a so-called rearview mirror. At this time, if there are obstacles such as curb or roadside trenches or pits in the vicinity of the rear wheel, it is dangerous, so that the side mirror angle can be changed to the actuator so that the rear view can be seen by the side mirror. The angle change of the side mirror is complicated by manual operation, and the delicate control of the angle is difficult. Therefore, an automatic angle control device has been developed.

For example, in JP 2000-138812A, the mirror body is tilted in conjunction with a reverse gear to tilt the mirror angle. When the shift lever enters the reverse gear, the mirror body is tilted with a DC motor. The amount of excess tilt due to inertia after stopping the DC motor at this time is counted as the number of pulse signals generated by the rotation of the DC motor, and includes the amount of excess tilt caused by the inertia when switching from the reverse gear to another gear. Therefore, a technique is disclosed in which the angle of the mirror body is returned to its original position, and the mirror body is always returned to the same position even if the mirror angle tilting operation is repeated several times.

However, since there is a difference in the mobility of the individual side mirror moving parts and the torque of the individual DC motors, the inertia rotation is stopped while stopping the power supply to the DC motor tilting one side mirror when the left and right side mirrors are tilted simultaneously. Later, the other DC motor may inertia rotate, and at this time, a phenomenon occurs that only a pulse signal appears on the DC motor which is stopped first even though it is not rotated (see FIG. 22). This is explained in detail.

When a certain amount of time is supplied to the DC motor so that the DC motor is lowered at the same time and the power supply is stopped at the same time, since the DC motor rotates slightly by the inertia even after the stop, the pulse signal 33 due to the inertia appears. Since there is a difference between the individual side mirror moving parts and the DC motor, the sum of the number of pulse signals 31 and 33 of the power supply rotation and the inertia rotation is different from right to left. Therefore, even if it starts to rise at the same time next time, the DC motor is rotated so as to tilt upward by the amount of each of the left and right downward power supply rotation and inertia rotation pulse signals 31 and 33, so that the end times of the power supply (35, 37) This is different from side to side, and the end times 36 and 38 of the inertia rotation also differ from side to side. In FIG. 22, the left DC motor stops first, but when the inertia rotation of the left DC motor is stopped (36), when the right DC motor makes the inertia rotation 33, the inertia rotation is also performed on the stopped left DC motor. The pulse signal 34 appears as if. The pulse signal 34 is derived from the inertia rotation of the right DC motor, and may be referred to as a so-called false pulse signal 34, but the signal shape is the same as the pulse signal 33 of the inertia rotation. Since the false pulse signal 34 has already appeared at the end of the pulse signal 33 due to the inertia rotation, the pulse signal 33 and the noise pulse signal 34 due to the inertia rotation can not be distinguished.

Therefore, the mirror body does not return to its original position by counting up to the noise, which is a false pulse signal, and returning it to its original position. You will be greatly off the angle. This phenomenon appears to occur because one of the power lines of the left and right DC motors is shared, but the current system cannot independently separate the power lines from side to side.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the structure of the side mirror control apparatus of 1st Embodiment.

2 is a perspective view illustrating an example of a side mirror of a first embodiment.

3 is an explanatory diagram showing a structural example of a DC motor.

4A to 4E are explanatory views showing a state in which a contact state of a commutator and a brush changes according to the rotation operation of the DC motor.

Fig. 5A is an explanatory diagram showing a correspondence relationship between the rotation angle of a DC motor and a change state of a motor current, and Figs. 5B to 5D are explanatory diagrams showing the output after the signal processing of this motor current in stages.

Fig. 6 is a timing diagram of power supply to a left and right DC motor and a generated pulse signal in the first embodiment.

Fig. 7 is a block diagram showing the side mirror control device configuration of the second embodiment.

8 is a timing diagram of the driver circuit and the DC motor operation of the second embodiment;

Fig. 9 is a timing diagram of the driver circuit and the DC motor operation of the third embodiment.

10 is a block diagram showing a configuration of a side mirror control device according to a fourth embodiment.

The block diagram which shows the structure of the side mirror control apparatus of 5th Embodiment.

12 is a block diagram showing a configuration of a side mirror control device according to a sixth embodiment.

13A and 13B are conceptual views showing a specific pulse signal and a high frequency component included in the waveform signal detected in the first embodiment.

Fig. 14 is a block diagram showing a side mirror controller according to another embodiment.

15A to 15D are conceptual views showing a specific pulse signal and a high frequency component included in the waveform signal detected in the second embodiment.

16A and 16B are conceptual views showing a specific pulse signal and a high frequency component included in the waveform signal detected in the third embodiment.

17A to 17D are conceptual views showing a specific pulse signal and a high frequency component included in the waveform signal detected in the fourth embodiment.

18 is a block diagram showing a configuration of a side mirror control device according to a seventh embodiment.

19 is a block diagram showing a configuration of a side mirror control device according to an eighth embodiment.

20 is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal in a starter or a transient state of a DC motor;

Fig. 21 is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal in the constant speed of a DC motor.

Fig. 22 is a timing diagram of powering and generating pulse signals to left and right DC motors under conventional control.

23 is a timing diagram of a conventional driver circuit and DC motor operation.

24 is a conceptual diagram illustrating a specific pulse signal and a high frequency component included in a waveform signal.

25 is a conceptual diagram illustrating pulse width and pulse interval.

FIG. 26 is a conceptual diagram illustrating a specific pulse signal and a low frequency component included in a waveform signal. FIG.

27A is a diagram showing a motor rotation detection signal at the forward rotation, and FIG. 27B is a diagram showing a motor rotation detection signal at the reverse rotation.

Fig. 28 is a block diagram showing the configuration of a side mirror control device in a comparative form.

29 is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal;

30A is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal in a DC motor starter or a transition machine according to the prior art, and FIG. 30B is an explanatory diagram showing a correspondence relationship between a motor current and a pulse signal in a DC motor constant speed regulator according to the prior art.

An object of the present invention is to count the pulse signal along with the rotation by excluding the noise generated in the electronic DC motor power circuit without counting when one DC motor is stopped and the other DC motor is inertia. The present invention provides a control apparatus and a control method for an automobile side mirror, which executes a control to return the side mirror to its original position accurately.

In order to achieve the above object, in the present invention, a predetermined time difference is set at the time of starting to tilt the left and right side mirrors, and the noise pulse signal is generated after the pulse signal generation by the inertia rotation of one DC motor is finished, Make it possible to clearly identify the rotation pulse signal and the noise pulse signal.

Specifically, the side mirror control apparatus of the present invention is connected to two DC motors respectively driving the left and right side mirror movable parts of the vehicle so as to adjust the vertical tilt angle of the mirror main body, thereby adjusting the supply power to the DC motor. The operation of the side mirror moving unit is performed.

And external signal detecting means for detecting an operation signal from the outside;

A power control circuit for controlling the power supply to the DC motor;

Two rotation angle detection means each configured between the power regulation circuit and the two DC motors, and detecting rotation angles of the DC motors based on a change state of the power supply amount according to the rotation operation of the DC motors;

Control means for controlling the supply of power to the DC motor by the power regulation circuit based on the signal from the rotation angle detecting means,

The control means executes a series of controls for tilting the movable part of the side mirror downward at an initial position, and then tilting upward to almost return to the original initial position.

When a downward tilt start signal is inputted from the external signal detecting means, the power control circuit supplies electric power to both DC motors from the power control circuit so as to tilt the movable parts of both side mirrors downward from an initial position, The sum of the rotation angles of the power supply detected by the two rotation angle detection means at tilting time and the rotation angle due to the inertia after the power supply stop is stored as the downward tilt rotation angle of the two DC motors, respectively.

When an uphill start signal is input after the downhill start signal is input from the external signal detecting means, power is supplied from the power regulation circuit to one of the DC motors, and the downhill rotation angle stored in the control means is provided. Tilt one side mirror movable part upward by almost the same amount to return to the initial position, and during the tilting, the DC motor is set to 1/6 or more and 1/2 or less of the down tilt rotation angle stored in this control means. When tilted upward to the delay angle, the other DC motor is supplied with electric power from the power regulation circuit, and the other side mirror has the same amount as the downhill rotation angle stored in this control means of the other DC motor. Tilt the movable part upwards to return it almost to the initial position,

In the upward tilting of both side mirrors, the sum of the upward rotational angle of the power supply of each of the DC motors detected by the two rotational angle detecting means and the upward rotational angle by inertia after the power supply is stopped, the upward tilting rotational angle Each of them is stored as a memory, and after the upward rotation by the inertia stops, the noise detected by the rotation angle detecting means is included in the upward tilt angle to remove the noise, and then the control of the series of side mirror moving parts is performed. And the tilt angles of tilting upward and downward are used for the control of tilting upward to return almost to the initial position.

With the above configuration, when the DC motor rotates in response to the electric power supply from the power control circuit, the amount of power supplied to the DC motor almost changes periodically due to the change in the internal impedance caused by the rotation operation. On the basis of this, the rotation angle of the DC motor is detected by the rotation angle detecting means. The control means first supplies electric power to both DC motors so that the movable part of the side mirror tilts downward by a predetermined amount, and counts (memorizes) the sum signal obtained by adding the inertia rotation angle to the downward rotation angle detected as the down tilt rotation angle, respectively. )do. Here, the initial position refers to the position of the side mirror at the time of normal driving (when driving forward) in which the driver can visually check the rear vehicle, and is the position set at the time of shipment of the vehicle. The predetermined amount of tilt down from the initial position is the down tilt of the side mirror movable portion by an angle at which the driver can visually check the rear wheel ground portion. In addition, adjusting the inclination angle of the mirror body in the vertical direction may tilt the whole side mirror, or may tilt only the mirror body or the mirror body and its accessories.

Next, upon detecting the upward tilt start signal, the control means first supplies electric power to only one DC motor, and rotates upward by the amount of downward tilt rotation angle of the DC motor, and the side mirror movable part is almost returned to the initial position. Turn. At this time, when the DC motor rotates by the set start delay angle, the control means supplies electric power to the other DC motor to rotate it upward by the corresponding downward tilt rotation angle, and activate the other side mirror. The default is almost returned to the initial position. The start delay angle set here is an angle set within a range of 1/6 to 1/2 of the downward tilt rotation angle of the former DC motor. By setting the start delay angle in this way, after the up-rotating operation of the former DC motor is finished and the inertia rotation is completed and completely stopped, the up-rotating operation of the latter DC motor can be terminated and the inertia rotation can be started. Therefore, when the former DC motor is stopped and the latter DC motor rotates inertia, the noise detected by the former rotation angle detecting means appears in time from the rotation angle signal caused by the former inertia rotation. That is, since there is no signal at all between the rotation angle signal and the noise, the noise can be distinguished from the rotation angle signal due to the inertia rotation, and the noise is filtered out so as not to be included in the upward tilt angle. have.

This upward tilt rotation angle is used for tilting the next series of side mirror moving parts, and the next tilt can be controlled by the amount of tilted angle, and is always the initial position after the downward and upward tilting is finished. The deviation can be made only by the amount of upward inertia of the meeting. If the start delay angle is less than 1/6 of the downward tilt rotation angle, there is a possibility that the rotation angle signal due to inertia rotation and noise cannot be separated in time depending on the state of the side mirror and the DC motor. If the start delay angle is greater than 1/2 of the downhill tilt angle, the driver starts to feel uncomfortable because the time difference between the left and right side mirror movable parts is increased upwardly.

Therefore, in the above arrangement, the rotation angle of the DC motor is detected by the rotation angle detecting means based on the change state of the power supply amount caused by the rotation operation of the DC motor tilting the movable part of the side mirror up and down, and based on this rotation angle. The power supply to the left and right direct current motors is adjusted, and the difference is set at the start time of the left and right power supply at the time of upward tilt, and the noise detected by the rotation angle detecting means is identified and excluded. After termination, it can always return to its initial position.

In the side mirror control apparatus of the present invention, the external signal detecting means is a gear selection state detecting means of an automobile transmission, and outputs a downhill start signal when the reverse gear of the transmission is selected, while the other side of the reverse gear is different. It may be configured to output the rising tilt start signal when the gear is changed.

With the above configuration, when the reverse gear of the transmission is selected to drive the vehicle backward, the selection is detected by the gear selection state detecting means, and the control of the power regulation circuit by the control means is executed to execute the DC motor from this power regulation circuit. Is supplied to the power supply, and the movable part of the side mirror is tilted downward by the rotation operation of the DC motor. Then, after that, when the rotation angle of the DC motor detected by the rotation angle detecting means reaches a predetermined angle, the power supply to the DC motor is stopped by the control means. As a result, the rearview mirror can be automatically tilted downward by a predetermined angle during the reverse driving of the vehicle, so that the driver can easily check the road surface near the rear wheel, the side trench, the curb, and the like.

Then, when the vehicle shifts to the forward driving again, the gear selection state detection means detects a change in the gear selection state from the reverse gear to another gear, whereby the control means controls the power regulation circuit. The side mirror movable part is tilted upward by the rotation operation of the DC motor. Then, when the rotation angles of the DC motors detected by the rotation angle detecting means are equal to the downward tilt rotation angles, respectively, the power supply to the DC motor is stopped by the control means. That is, when the side mirror is inclined downward by a preset angle in response to the backward driving of the vehicle, the side mirror can be tilted upward by the set angle to return to the initial position and automatically stopped. This makes it possible to automatically return the mirror body inclination angle of the side mirror to the initial position which is normally normal automatically when the vehicle shifts from the reverse operation to the forward operation, thereby eliminating the need for the driver to readjust the angle of the mirror one by one. Can be obtained.

In the side mirror control device of the present invention, the control of the next side mirror movable unit is performed by subtracting the difference between the upward and downward angles of the tilt angle in this control from the downward tilt angle in the next time control. May be configured to have a rotation angle of supplying electric power and tilting upward.

With the above configuration, after the downward and upward tilting of the side mirror is completed while being simple control, the difference can be always made by the amount of the upturning inertia rotation from the initial position.

However, the pulse signal of the DC motor rotation for excess tilt due to the inertia after the DC motor stops becomes smaller as the rotation becomes slower because there is no drive current of the DC motor, and at some point, even if the DC motor rotates, the pulse signal Is too small to count the pulse signal. That is, as shown in Fig. 23, when the power supply from the motor driver (drive circuit) is stopped and the motor operation is shifted from rotation to inertia rotation, the pulse coefficient becomes impossible in the latter half of the inertia rotation. Therefore, when the tilting operation of the side mirror is performed a plurality of times, the position thereof shifts little by little, and eventually the mirror angle deviates greatly from the initial angle. In this case, since the rear mirror cannot be checked by the side mirror, the driver is forced to manually adjust the mirror angle, which makes the driver cumbersome.

The side mirror control apparatus of the present invention is characterized in that the control means is at the end of downward tilting or at the end of upward tilting, and at substantially the same time as the end of power supply to the DC motor, the current of the sign is opposite to that of the electric power. The power control circuit may be configured to supply the direct current motor to the direct current motor for a predetermined first time.

With the above-described configuration, immediately after the power supply to the DC motor for tilting the side mirror movable part is finished, the inertia rotation of the DC motor can be reliably stopped by supplying an electrode made of a reverse code current for braking.

The side mirror control apparatus according to the present invention is the control means, when the down-tilting is finished or when the up-tilting is finished, the predetermined time when a predetermined second time elapses after the power supply to the DC motor is stopped. The power may be configured to supply, to the DC motor, the electric power consisting of a current having an inverse sign with the power current for the first time.

With the above-described configuration, when the power supply to the DC motor for tilting the side mirror movable part is terminated and the DC motor is inertia rotation, the inertia rotation can be reliably stopped by supplying electric power consisting of a reverse code current for braking. have.

In the technique of automatically controlling the tilt angle of the mirror, the tilt angle of the mirror is controlled by detecting a specific pulse signal generated by the rotation of the DC motor driving the mirror movable part and counting the specific pulse signal number. . If the coefficient of this specific pulse signal is inappropriate, the angle of the mirror main body gradually shifts from the predetermined angle while the falling tilt and the rising tilt are repeated. Therefore, various techniques have been developed to prevent such angle misalignment.

For example, JP2000-128812A executes control to tilt the mirror angle in conjunction with a reverse gear. When the shift lever enters the reverse gear, the mirror is tilted downward by a DC motor. After stopping the motor, the excess tilt due to inertia is counted as the number of pulse signals generated by the rotation of the DC motor, and when the gear is changed from the reverse gear to another gear, the mirror angle is returned to the mirror for the first time including the excess tilt caused by the inertia. A technique has been disclosed in which the mirror is always returned to the same position even if the tilt operation of the angle is repeated several times.

As shown in Fig. 24, the DC motor generates a specific pulse signal a in accordance with its rotation, and also generates a high frequency component b immediately after the specific pulse signal a. Immediately after the high frequency component b, a pseudo specific pulse signal c derived from the ringing phenomenon of the high frequency component b is generated. When the pseudo specific pulse signal c is detected by the pulse signal detecting means together with the specific pulse signal a, the "pulse split" in which the specific pulse signal a, which should be originally detected, is divided into two and detected. Iranian phenomenon occurs. If the pseudo specific pulse signal c is calculated as the desired specific pulse signal a, the exact number of pulse signals cannot be detected. Therefore, the high frequency component b is removed using a low pass filter for this pulse splitting problem. This prevents the generation of the pseudo specific pulse signal c.

In addition, since the motor rotation speed increases during the constant speed rotation of the DC motor, as shown in FIG. 25, the pulse interval L tends to be smaller than the specific pulse width d, and the pulse interval L becomes very small. In other words, a phenomenon called "pulse coupling" occurs in which two adjacent pulse signals are regarded as one pulse signal and calculated. Since the exact number of pulse signals cannot be counted, countermeasures such as correcting the pulse width appropriately have been taken for this pulse coupling problem.

As described above, researches and developments have been made to increase the precision of specific pulse signal coefficients generated by the rotational operation of a DC motor in the technology related to the automatic control of the mirror angle.

Recently, side mirrors of automobiles are configured to be equipped with other electric parts such as flashing lights and foot lamps in addition to the mirror driving device. Therefore, as shown in Fig. 26, the current supplied to the DC motor is also filtered in consideration of the adverse effect that the specific pulse signal a generated from the mirror driving DC motor affects other electrical components. In this case, the level of the low frequency component e is relatively larger than the signal level of the specific pulse signal a. Thereby, the specific pulse signal a below the predetermined threshold value is not detected in relation to the amplitude of the low frequency component e, or the peak of the low frequency component e may be detected as the specific pulse signal. Then, there is a problem that the mirror angle cannot be controlled due to a so-called limit phenomenon, in which the specific pulse signal generated by the rotation of the DC motor cannot be counted correctly and the mirror angle does not return to a predetermined position.

In the side mirror control device of the present invention, the rotation angle detecting means detects a voltage change of a resistor between the DC motor and the motor driver as a waveform signal generated by the rotation operation of the DC motor, and detects the detected waveform. From the signal is configured to extract and output a specific pulse signal generated by the rotation of the DC motor,

The control means counts a specific pulse signal output from the rotation angle detecting means, calculates the tilt angle of the mirror body based on the count value, and controls the motor driver based on the calculation result;

A bandpass filter for removing the high frequency component and the low frequency component, which are noise components included in the detected waveform signal, and a waveform shaping circuit for shaping and outputting a specific pulse signal output from the bandpass filter into a square wave; It may be provided with.

According to the above configuration, the control means drives the DC motor through the motor driver when a signal instructing the starting of the mirror is input. As the DC motor rotates, periodic voltage changes occur in the DC motor and the resistors of the motor driving period. The rotation angle detecting means detects this voltage change as a waveform signal. The detected waveform signal includes a high frequency component or a low frequency component which is a noise component in addition to the specific pulse signal. Since the bandpass filter has a filter characteristic set to transmit only a specific pulse signal in advance, only the specific pulse signal generated by the rotation of the DC motor is extracted by removing the high frequency component and the low frequency component included in the waveform signal. Thus, by removing the high frequency components by the band pass filter, it is possible to prevent the generation of pseudo specific pulse signals due to the ringing phenomenon of the high frequency components. In addition, by removing the low frequency component by the band pass filter, it is possible to prevent the coefficient dropout of the specific pulse signal and the error coefficient of the low frequency component peak.

The specific pulse signal extracted by the band pass filter is input to the waveform shaping circuit. At this point in time, the specific pulse signal, which is an analog pulse signal, is shaped into a square wave having a predetermined pulse width in the waveform shaping circuit to become a digital pulse signal. The specific pulse signal shaped as the square wave is input to the control means.

It is also possible to place a limiter between the high pass filter and the analog switch. The limiter removes components above a predetermined value of a specific pulse signal input to the analog switch. Therefore, it is possible to prevent the pulse signal exceeding the input specification from being input to each device included in the waveform shaping circuit or the control means.

The digital pulse signal output from the rotation angle detecting means is generated by removing the noise component generated by each factor, and thus originates only from the specific pulse signal generated by the rotation of the DC motor.

The digital pulse signal output from the rotation angle detecting means is inputted to the control means and counted. The control means includes a preset pulse signal per rotation of the motor, the relationship between the motor rotation speed and the mirror tilt angle, the mirror angle in normal operation, the mirror angle in reverse operation, and the coefficients for correcting the inertia rotation of the DC motor, and the rotation angle detection means. The tilt angle of the mirror is calculated from the number of pulse signals input from the mirror.

Here, the mirror angle at the time of normal driving means the side mirror angle at which the driver can visually check the rear vehicle at the time of normal driving. The mirror angle at the time of reversing is a mirror angle set by the driver so that the driver can visually check the ground portion of the rear wheel when the vehicle is reversed.

The control means controls the motor driver so that the mirror stops exactly at the mirror angle in the reverse direction or the mirror angle in the normal operation based on the calculation result.

Therefore, in the above-described configuration, the state of supply current caused by the rotation operation of the DC motor tilting the movable part of the side mirror up and down is detected by the rotation angle detecting means as a waveform signal and extracted from the waveform signal. The tilt angle of the mirror main body is controlled by adjusting the amount of power supplied to the DC motor based on the specific pulse signal generated by the rotation. In addition, since the rotation angle detection means extracts a specific pulse signal using a low pass filter and a high pass filter, it is possible to remove not only a high frequency component but also a low frequency component, so that the rotation of the DC motor can be controlled very accurately. Therefore, even if the tilting operation in the vertical direction of the mirror main body is repeatedly performed, the mirror main body stops exactly at a predetermined position, and thus does not cause a problem such as so-called limit phenomenon.

In this case, the side mirror control apparatus of the present invention may be configured such that the band pass filter is a combination of a low pass filter for removing high frequency components among noise components and a high pass filter for removing low frequency components among noise components.

With the above-described configuration, the combination of the low pass filter and the high pass filter can embody the configuration of the band pass filter. The low pass filter removes the high frequency component included in the signal detected by the rotation angle detecting means. By removing the high frequency component by the low pass filter, it is possible to prevent the generation of a pseudo specific pulse signal due to the ringing phenomenon of the high frequency component. On the other hand, the high pass filter removes the low frequency components included in the waveform signal. By removing the low frequency component by the high pass filter, it is possible to prevent the coefficient dropout of the specific pulse signal and the error coefficient of the low frequency component peak, thereby accurately controlling the tilting of the mirror body. As described above, the low pass filter and the high pass filter remove noise components so that only a specific pulse signal generated by the rotation of the DC motor is extracted. The specific pulse signal extracted by the band pass filter composed of the low pass filter and the high pass filter is converted into a rectangular digital pulse signal by the waveform shaping circuit and then output to the control circuit.

In addition, the side mirror control apparatus of the present invention, the band pass filter, a low pass filter for removing the high frequency components included in the waveform signal, and a low frequency component included in the waveform signal during the forward rotation of the DC motor and when the reverse rotation Combination of two systems of high pass filter that remove low frequency components included in waveform signal, respectively

According to the instruction of the control means, an analog switch may be further provided to output one of the specific pulse signals output from the two high pass filters to the waveform shaping circuit.

When the DC motor falls and rises in the mirror, if the direction of rotation is reversed and its output is also different, the voltage level of the waveform signal detected by the rotation angle detection means also changes. Therefore, when the voltage level difference between the direct rotation and the reverse rotation of the DC motor is large, one high pass filter may not extract the desired specific pulse signal. However, in the above configuration, the band pass filter includes two systems of high pass filters for removing low frequency components during direct rotation of the DC motor and low frequency components during reverse rotation, respectively. The filter characteristics of each of the high pass filters are set in advance so as to be applied at the time of forward rotation and reverse rotation of the DC motor. Therefore, even when the waveform signal voltage level difference between the forward and reverse rotations of the DC motor is large, the two high-pass filters remove the low frequency components corresponding to the respective power supplies. That is, the pulse signal from which the high frequency component was removed by the low pass filter is input into these two types of high pass filters, respectively. The low frequency component is removed from the waveform signal input to each high pass filter by at least one high pass filter. The waveform signals passing through the two high pass filters are all input to the analog switches. The control means detects whether the DC motor rotates in the forward or reverse direction, and in the case of forward rotation, only the specific pulse signal input from the high pass filter set as the filter characteristic at the forward rotation among the waveform signals input from each high pass filter. The analog switch is controlled to output to the waveform shaping circuit. On the other hand, if the rotation of the DC motor is reverse rotation, the control means controls the analog switch to output only the waveform signal input from the high pass filter set to the filter characteristic at the reverse rotation of the waveform signals to the waveform shaping circuit. The specific pulse signal input to the waveform shaping circuit is converted into a rectangular digital pulse signal and then output to the control circuit.

Therefore, with the above configuration, the filter characteristics of each high pass filter are set in advance so as to adapt to each of the direct rotation and the reverse rotation of the DC motor. Therefore, even when the voltage level of the motor drive circuit differs between the forward and reverse rotations of the DC motor, any one of the high pass filters can reliably remove low frequency components.

In the side mirror control apparatus of the present invention, the band pass filter may be constituted by an active filter having an amplifier.

The above structure is a filter in which the active filter is provided with an active element such as an amplifier as an amplifier. By using the active filter as the band pass filter, the pass allowable band can be more clearly determined. As a result, the high frequency component and the low frequency component included in the waveform signal can be removed reliably, and the desired specific pulse signal can be extracted with high precision.

As a power source of the DC motor, a battery of an automobile is usually used. However, when the power supply voltage is lowered or becomes 0 due to a failure of a battery or a generator or a breakdown of the power wiring, or the like, the DC motor does not rotate or the torque is too low to operate normally, or the rotation stops on the way. In addition, the amplitude of the pulse signal also decreases due to the decrease in the power supply voltage, which may make the counting impossible. In such a case, the tilt control may not be executed normally, and the mirror may stop in the middle of the normal position and the downward position, or the mirror may be bent up or down. There are times when you will be gone.

The side mirror control device of the present invention, the power supply for supplying power to the DC motor,

A monitor circuit for monitoring the power supply voltage of the power supply and issuing a power supply command to the control means so as to supply power to the DC motor by the power regulation circuit only when it is larger than a predetermined voltage may be provided.

With the above configuration, even if the power supply voltage of the power supply falls below a predetermined voltage, the monitor circuit detects it so that power is not supplied to the DC motor, thereby preventing the movable portion of the side mirror from stopping at an abnormal position.

In the control apparatus of the conventional remote control type side mirror, one drive motor is used for each side mirror of the left and right. When the mirror body is tilted in the vertical direction, for example, the motor is rotated forward to tilt the mirror body downward, while the DC motor is rotated reversely to tilt the mirror body upward. In such a mirror angle control device, the direction of the current supplied to the DC motor is reversed at the time of forward rotation and reverse rotation of the DC motor. Therefore, the phenomenon that the polarity of the specific pulse signal caused by the rotation of the DC motor is reversed. Therefore, in order to extract a specific pulse signal having a different polarity with various filters and amplify it with an amplifier, for example, a non-inverting amplifier is required to amplify a pulse signal during forward rotation. In order to amplify the signal, two types of pulse detection circuits are required, which require an inverted amplifier. On the other hand, in recent years, in addition to the mirror driving device, a large number of electronic devices such as flashing lights and foot lamps, a large number of electric parts, and car navigation systems are installed, thereby improving the operation reliability of the remote control side mirror control device. Simplification of circuits and reduction of component points are required.

The side mirror control apparatus of the present invention is characterized in that the rotation angle detecting means detects a change in the resistor voltage of the DC motor and the motor driving period generated by the rotation operation of the DC motor as a waveform signal, and from the detected waveform signal. In addition to extracting and outputting a predetermined pulse signal,

The control means counts the pulse signal output from the rotation angle detecting means, calculates the tilt angle of the mirror body based on the count value, and controls the motor driver based on the calculation result; ,

The rotation angle detecting means includes a filter for extracting a predetermined pulse signal from the waveform signal, an amplifier for amplifying the pulse signal extracted by the filter, and a waveform shaping circuit for shaping the pulse signal amplified by the amplifier into a square wave. and,

The amplifier non-inverts and amplifies a specific pulse signal generated by the rotation of the DC motor during forward rotation of the DC motor, while the specific pulse signal generated by the rotation of the DC motor during reverse rotation of the DC motor. It may be configured to non-invert amplify the high frequency component generated immediately after.

With the above configuration, the side mirror control device controls the tilting of the mirror main body by detecting a specific pulse signal generated by the rotation of the DC motor for driving the mirror main body or a high frequency component occurring immediately after the specific pulse signal. The control means changes the rotational direction of the DC motor by changing the polarity of the voltage applied to the DC motor through the motor driver. When the direction of rotation of the DC motor is changed, the polarity of the specific pulse signal and the high frequency component included in the waveform signal are also reversed. Therefore, in the forward rotation, the specific pulse signal generated by the rotation of the DC motor is amplified, and in the reverse rotation, the high frequency component generated immediately after the specific pulse signal generated by the rotation of the DC motor is amplified. The filter is set to extract a specific pulse signal generated by the rotation of the DC motor, and at the same time, a high frequency component generated in the same polarity as the specific pulse signal during reverse rotation of the DC motor is set to extract as a pulse signal. Both the specific pulse signal at the forward rotation of the DC motor extracted by the filter and the pulse signal derived from the high frequency component at the reverse rotation are all the same polarity. These signals having the same polarity are non-inverted and amplified by one amplifier. The amplified signal is shaped into a square wave of the amplified pulse signal in the waveform shaping circuit and is output to the MPU as a digital pulse signal. In this way, the non-inverted amplification of the signal at the forward rotation and the signal at the reverse rotation extracted by the filter with a single amplifier yields a desired pulse signal of the same polarity. Thereby, a desired signal can be detected by one rotation angle detection means.

Therefore, according to the above configuration, in the process of extracting and amplifying the pulse signal generated by the rotation of the DC motor by the rotation angle detecting means, the signal of the forward and reverse rotation of the DC motor is detected by the rotation angle detecting means of one system. Since the rotation angle detection means which previously required two systems for forward rotation and reverse rotation can be simplified, the number of parts used can be reduced. In addition, the tilting angle of the mirror body can be accurately controlled.

In this case, the side mirror control apparatus of the present invention, the amplifier reversely amplifies the high-frequency components generated immediately after a specific pulse signal generated by the rotation of the DC motor during forward rotation of the DC motor, The motor may be configured to invert and amplify a specific pulse signal generated by the rotation of the DC motor at the time of reverse rotation of the motor.

According to the above configuration, in the forward rotation, the high frequency component generated immediately after the specific pulse signal generated by the rotation of the DC motor is amplified, and in the reverse rotation, the specific pulse signal generated by the rotation of the DC motor is amplified. The filter is set to extract a high frequency component generated at the forward rotation of the DC motor as a pulse signal, and to extract a specific pulse signal generated at the reverse rotation of the DC motor. The specific pulse signal at the forward rotation of the DC motor extracted by the filter and the pulse signal derived from the high frequency component at the reverse rotation all have the same polarity. These signals having the same polarity are inverted and amplified by one amplifier. The amplified signal shapes a pulse signal amplified by the waveform shaping circuit into a square wave and is output to the MPU as a digital pulse signal. Therefore, by inverting and amplifying the signal at the forward rotation and the signal at the reverse rotation extracted by the filter with one amplifier, a desired pulse signal of the same polarity can be obtained, and the desired signal can be detected by one rotation angle detection means. .

In JP 2001-138812A, the control of tilting the mirror angle in conjunction with the reverse gear is executed. When the shift lever enters the reverse gear, the mirror is tilted downward by the DC motor. The amount of excess tilt caused by the rotation of the DC motor is counted as the number of electric pulse signals, and when it is switched from the reverse gear to another gear, the mirror angle is restored to its original value, including the amount of excess tilt caused by the inertia. A technique is disclosed in which the mirror is always returned to the same position even if the tilting operation is repeated a plurality of times. This pulse signal converts and detects a high frequency signal generated at the time of brush switching at the time of motor rotation with a pickup coil.

However, in the above technique, tilting both up and down is performed by one DC motor, and switching up and down is performed by reversing the supply current polarity to the DC motor. Therefore, in the up-tilting and the down-tilting, FIGS. 27A and 27B As shown in Fig. 2, the phase of the pulse signal generated by the motor rotation is reversed. Therefore, two series of circuits for detecting and counting pulse signals are required, which increases parts and costs. As shown in Fig. 28, the same applies to the case where a resistor is connected to the power supply wiring to the DC motor and a pulse signal is detected as the current signal.

The side mirror control apparatus of the present invention further comprises two power wirings connecting the DC motor and the power regulation circuit.

The rotation angle detecting means is connected to the two power wirings, and is configured to detect the rotation angle of the DC motor based on an electrical signal in a state of change in power supply amount according to the rotation operation of the DC motor.

The power control circuit is configured to supply power each of which the currents of the power supplied to the DC motors are made of the reverse code current to each other in the case of adjusting the upward tilt angle and the downward tilt angle of the mirror body. ,

The rotation angle detecting means acquires a signal from one of the two power wires when adjusting the up-tilting angle of the mirror body, and acquires a signal from the other of these two power wires when adjusting the down-tilting angle. It may be configured.

In the above configuration, in the up-tilting and down-tilting, both phases of the same phase signal can be obtained by a simple configuration of acquiring an electrical signal from a separate wiring of two power wirings connected to a DC motor. The circuit can be reduced to one series, so that the cost can be reduced.

As shown in Fig. 29, the motor rotation angle detection circuit disclosed in JP2001-138812A extracts a signal generated every time a DC motor rotates by a predetermined rotation angle (for example, 60 degrees), using DC removal, an amplifier and a limiter. After selecting forward / reverse rotation with the analog switch, the waveform shaping circuit converts the pulse signal into a pulse signal with a constant pulse width, and inputs it to the microcomputer to detect the motor rotation angle from the number of pulse signals. Such detection of the motor rotational speed assumes that the motor rotational angle and the number of pulse signals correspond one to one.

However, when the motor rotational speed of the motor starter or the transition is low, as shown in Fig. 30A, since the signal cycle from the DC motor is about 3 to 8 msec, the waveform distortion such as ringing generated between the signals is generated by the waveform shaping circuit. Since the waveform distortion, such as ringing, is also waveform-shape, there is a fear that so-called pulse splitting may occur, in which a larger number of pulse signals are counted than the exact number of pulse signals.

On the other hand, when the motor rotational speed of the motor speed regulator is high, as shown in Fig. 30B, the signal period from the DC motor is short, about 1 to 2 msec, so that a plurality of signals (for example, two) are one signal in the waveform shaping circuit. It is possible to generate so-called pulse coupling, in which the number of pulse signals is counted less than the exact number of pulse signals because the signals to be waveform-shaped are cut. If the exact number of pulse signals is not counted in this manner, the detected motor rotation angle is also inaccurate. Therefore, high precision control of the mirror tilt angle cannot be executed.

In the side mirror control apparatus of the present invention, the rotation angle detecting means includes a signal generator for generating a predetermined signal each time the DC motor rotates by a predetermined angle, and a signal from the signal generator is input to determine the signal. It has a signal output unit for shaping and outputting the pulse signal of the pulse width,

The signal output section may be configured such that the pulse width of the pulse signal is shorter when the motor rotational speed is higher than when the motor rotational speed is relatively low.

In the above configuration, the pulse width of the pulse signal is shorter when the motor rotational speed is higher than when the motor rotational speed is relatively low. Therefore, when the motor rotational speed of the motor starter or the transition is low, the occurrence of so-called pulse splitting, which is difficult to recognize waveform distortion such as ringing generated between the signals as signals in the waveform shaping circuit, is suppressed. In addition, when the motor rotational speed of the motor speed governor is high, generation of so-called pulse coupling, in which a plurality of signals are hardly recognized as one signal in the waveform shaping circuit, is suppressed.

In this case, the side mirror control apparatus of this invention may be comprised so that the said pulse output part may change the pulse width of the said pulse signal in two steps on the basis of a specific motor rotational speed.

The pulse width of the pulse signal may be changed continuously, but the pulse width of the pulse signal may be changed in steps as a simple matter, and the pulse width of the pulse signal may be changed in two stages based on the specific motor rotational speed as described above. It is the simplest to change.

The side mirror control apparatus of the present invention may be set so that the pulse signal pulse width when the motor rotational speed is faster than the specific motor rotational speed regulates the pulse coupling of the pulse signal. Here, the pulse width for regulating the pulse coupling of the pulse signal is determined by the device configuration, and the pulse width at which the pulse coupling does not occur at all when the motor rotation speed is faster than the specific motor rotation speed.

The side mirror control apparatus of the present invention may be set so that the pulse signal pulse width when the motor rotational speed is lower than the specific motor rotational speed regulates the pulse splitting of the pulse signal. Here, the pulse width for regulating the pulse splitting of the pulse signal is determined by the device configuration, and is the pulse width at which no pulse splitting occurs at all when the motor rotational speed is lower than the specific motor rotational speed.

In the side mirror control method of the present invention, two DC motors are driven by the left and right side mirror movable parts of the vehicle so as to adjust the inclination angle of the mirror body, and the operation of the side mirror movable part is controlled by adjusting the supply power to the DC motor. It is intended to run.

Then, each of the movable parts of both side mirrors is supplied with electric power to the DC motors to tilt the motors in one direction by a predetermined angle, and the rotation angles during the power supply of each of these DC motors and the inertia after the power supply is stopped. Remembering,

The movable parts of both side mirrors are supplied in the opposite direction by supplying electric power to the respective DC motors by the sum of the rotation angles of the respective electric power supplies in the one direction and the rotation angles by the inertia after the power supply stops, thereby rotating the DC motors. At the time of tilting, the start of power supply to one DC motor is delayed by a predetermined delay time from the start of power supply to the other DC motor, and the rotation angle and the inertia after power supply stop are supplied. And storing the rotation angle by

The predetermined delay time is a time obtained by adding the delay time to the power supply time to the other DC motor when the movable parts of both side mirrors are tilted in the reverse direction. The other DC motor is set to be longer than the time when the power is rotated by the inertia after the power supply stops.

In this method, since the start of power supply to one DC motor is delayed by a predetermined delay time from the start of power supply to the other DC motor, the noise that appears when the rotation angle of the one DC motor is stored is compared with the actual rotation angle signal. Can be distinguished, and accurate control can be performed. In other words, since the time obtained by adding the delay time to the power supply time to the one DC motor is longer than the time obtained by adding the phase rotation time to the power supply time to the other DC motor, the noise and the rotation angle signal can be reliably distinguished. Here, the predetermined delay time is 1/6 or more and 1/2 or less of the time required for the other DC motor to rotate by the rotation angle in one direction during the power supply and the rotation angle by the inertia after the power supply stops. It is preferable to distinguish the noise from the rotation angle signal with certainty.

In the side mirror control method of the present invention, the DC motor is driven by supplying electric power to each of the DC motors, and the movable part of the side mirror is tilted upward or downward by a predetermined amount, and then the current of the supplied electric power is different. The electric power which consists of a reverse code electric current may be supplied to this DC motor for a predetermined 1st time.

According to the above-described method, after inclining the movable part of the side mirror by a DC motor at a predetermined angle, the inertia rotation can be reliably stopped by supplying braking by supplying electric power of reverse current to the DC motor for the first time. The mirror can be returned to its original position.

In this case, the side-mirror control method of this invention may be made to perform the supply of the electric power which consists of the said reverse code | current current at the time which the predetermined 2nd time passed after stopping supplying the power to the said DC motor.

According to the above method, the movable part of the side mirror is inclined at a certain angle by the DC motor, and then the electric power of the reverse current is supplied to the DC motor for the second time and braked, so that the brake is applied during the inertia rotation of the DC motor. The side mirrors can be returned to their original position by easy and reliable rotation.

The side mirror control method of the present invention includes a waveform signal detecting step of detecting, as a waveform signal, a voltage change of the DC motor and a motor driving period resistor generated by the rotation operation of the DC motor;

A specific pulse signal extracting step of extracting a specific pulse signal generated by the rotation of the DC motor included in the waveform signal detected in the waveform signal detecting step;

An inclination angle calculation step of counting a specific pulse signal extracted in the specific pulse signal extracting step and calculating a tilt angle of the mirror body based on the count value;

And a supply power control step of controlling the supply power from the motor driver to the DC motor to stop the mirror body at a predetermined angle based on the calculation result in the inclination angle calculation step.

In the specific pulse signal extracting step, the high frequency component of the waveform signal detected in the waveform signal detecting step may be removed by the low pass filter, and the low frequency component may be removed by the high pass filter to extract the specific pulse signal.

According to the above method, the specific pulse signal generated by the rotation operation of the DC motor for adjusting the inclination angle of the mirror body can be extracted by the low pass filter and the high pass filter. Since the specific pulse signal extracted as described above removes noise components, it is possible to accurately control the rotation of the DC motor.

The side mirror control method of the present invention monitors a power supply voltage of a power supply for supplying power to the DC motor, and when the power supply voltage is lower than a predetermined voltage when the side mirror movable part is driven in a stopped state, the side mirror movable part is controlled. You may keep it in a stopped state.

According to the above method, since the battery voltage is monitored and controlled so as not to drive the DC motor when the voltage is lower than the predetermined voltage, the movable part of the side mirror can be prevented from being stopped before the predetermined amount is driven. In addition, since the DC motor is supplied with power only when the battery voltage is greater than the voltage at which the DC motor rotation angle can be detected when the DC motor rotation angle is detected and controlled, the abnormal operation control can be prevented from being executed. In other words, when the power supply voltage drops below a predetermined voltage due to a failure of a battery or a generator, and the voltage of the moving parts of the automotive electronics is not able to operate normally, the moving part is kept in a stopped state. It can be prevented that the case which is torn off on the way or the operation control is not performed normally, and is thrown off on the way repeatedly drives the movable part to an abnormal position.

The control method of the vehicle side mirror includes: a waveform signal detecting step of detecting, as a waveform signal, a voltage change of the DC motor and a motor driving period resistor generated by the rotation operation of the DC motor;

A pulse signal extraction step of extracting, by filtering, a predetermined pulse signal included in the waveform signal detected in the waveform signal detection step;

A signal amplifying step of non-inverting or inverting amplifying the pulse signal extracted in the pulse signal extracting step;

A waveform shaping step of shaping the pulse signal amplified in the signal amplifying step by shaping the square wave;

An inclination angle calculation step of counting a square wave shaped in the waveform shaping step and calculating a tilt angle of the mirror body based on the count value;

A supply power control step of controlling the supply power from the motor driver to the DC motor may be further provided to stop the mirror body at a predetermined angle based on the calculation result in the inclination angle calculation step.

According to the above method, the non-inverting amplifier type or the inverting amplifier type is selected as the amplification means used in the step of amplifying the pulse signal in advance according to the characteristic of the DC motor or the position where the waveform signal is detected. The circuit required for two systems to amplify the pulse signal detected at the forward rotation and the reverse rotation can cope with only one system.

In the control method of the side mirror of the present invention, by using the electrical detection signal of the rotation angle of the DC motor, by controlling the power supplied to the DC motor through the power supply wiring, the operation control of the side mirror movable unit is made,

Each detection signal may be acquired from the different power supply wirings so that the detection signal at the time of adjusting the up-tilting angle of the mirror body is in phase with the detection signal at the time of adjusting the down-tilting angle.

According to the above-described method, the electrical detection signals can be obtained from separate locations in the up-tilting and down-tilting, so that signals of the same phase can be obtained. Since the circuits for counting these signals are sufficient for one series, the cost can be reduced. .

The control method of the side mirror of the present invention includes a signal generation step of generating a predetermined signal each time the DC motor rotates by a predetermined angle;

A signal shaping conversion step of shaping the signal generated in the signal generation step into a pulse signal having a predetermined pulse width;

In the signal shaping conversion step, the pulse signal pulse width when the motor rotational speed is higher than when the motor rotational speed is relatively low may be shortened.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

(1st embodiment)

1 and 2 show a motor vehicle remote control type side mirror control device according to a first embodiment of the present invention, and in Fig. 2, reference numeral 1 denotes a so-called side mirror (door mirror) installed at the lower right front pillar of the vehicle. . The side mirror 1 has a casing 2 shaped like a clam shell, and the actuator assembly 3 is accommodated in the casing 2, and at the rear of the vehicle of the casing 2 almost over the entire surface. A mirror body 4 made of a flat mirror is disposed, and the mirror body 4 is mounted to the actuator assembly 3 via the base plate 25. And the angle of the up-down direction of the mirror main body 4 is respectively adjusted by the reduction gear unit which is not shown by operation of the DC motor 5R (DC motor: shown only in FIG. 1) built in the actuator assembly 3, respectively. It is composed. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. A DC motor (not shown) for adjusting the horizontal angle of the mirror body 4 is similarly mounted to the actuator assembly 3.

The DC motor 5R is connected to the controller 6 (control device) by an electrical wiring device (wiring harness). The controller 6 is connected to a battery 7 which is a power source, and at the same time, at least a remote control operation switch 8 which is manually operated by a driver of a vehicle, and a gear selection position switch that cooperates with a gear switching lever operation (not shown) ( 9) an output signal from (gear selection state detecting means) is input, and according to a signal input from the switches 8 and 9 to the controller 6, the supply power to the DC motor 5R is adjusted. Then, the inclination angle of the mirror main body 4 of the remote control type mirror 1 is adjusted. In other words, the switches 8 and 9 correspond to external signal detecting means.

Specifically, the controller 6 receives an output signal from the remote control operation switch 8 or the gear selection position switch 9, and outputs a control signal corresponding to this signal to the driver circuit 11. 12 are arranged, and the direct current voltage is applied to the left and right DC motor 5R, 5L terminals by the driver circuit 11 receiving the control signal from the MPU 12, respectively, and the DC motors 5R, 5L. ) Is configured to rotate. With this configuration, the car driver operates the remote control operation switch 8 so that the tilt angle of the mirror body 4 in the up-down direction can be obtained so that an appropriate rear clock can be obtained in a substantially horizontal direction while sitting in the driver's seat during normal forward driving. Can be easily adjusted. And automatic adjustment of the up-down inclination-angle of the mirror main body 4 corresponding to gear switching mentioned later can also be performed. Here, the driver circuit 11 corresponds to a power regulation circuit for regulating the supply power to the DC motors 5R and 5L, and also corresponds to control means for the MPU 12 to control the driver circuit 11. . In addition, illustration of the memory, I / O interface, etc. in the controller 6 is abbreviate | omitted.

The controller 6 adjusts the rotation angles of the DC motors 5R and 5L based on the change state of the currents iR and iL supplied from the driver circuit 11 to the DC motors 5R and 5L. It has the motor rotation angle detection circuit 13R, 13L (rotation angle detection means) to detect. The motor rotation angle detection circuits 13R and 13L focus on the fluctuation of the respective supply currents iR and iL due to the change in the internal impedance caused by the rotational operation of the respective DC motors 5R and 5L. The rotation angles of the DC motors 5R and 5L are detected from the fluctuating state of (iR, iL). Specifically, the DC current iR, which flows from the driver circuit 11 to each of the DC motors 5R and 5L, is measured. filter circuits 15R and 15L comprising resistors 14R and 14L for detecting iL, low pass filters for removing high frequency components of current waveforms flowing through the resistors 14R and 14L, and the filter circuit 15R. And amplification circuits 16R and 16L, each including an amplifier for amplifying the output from 15L, and waveform shaping circuits 17R and 17L for shaping the output waveforms from the amplification circuits 16R and 16L into square waves. do.

In the description so far, DC motors 5R and 5L, motor rotation angle detection circuits 13R and 13L, resistors 14R and 14L, filter circuits 15R and 15L, amplification circuits 16R and 16L, waveform shaping In the circuits 17R and 17L and the supply currents iR and iL, R is attached to the one corresponding to the right side mirror 1, and L is corresponded to the left side mirror 1. Codes in which R and L are omitted are used.

To describe the controller 6 in more detail, the DC motor 5 used in the remote control side mirror 1 of the first embodiment is, for example, a three-slot motor as shown in FIG. As is well known, a rotor 53 having three electric magnets 52, 52, and 52 is mounted to the rotating shaft 51 of the DC motor 5 with an insulating part interposed therebetween, and a stator made of a permanent magnet outside thereof. 54) is excreted. On the coaxial with the rotor 53, a commutator 55 for supplying current to the coils of the electric magnets 52 is integrally disposed with the rotor, and is in contact with the outside of the commutator 55. Brushes 56 and 56 are disposed so as to be disposed.

When the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the direction of the current supplied from the brushes 56 and 56 to each electric magnet 52 through the commutator 55 is changed. By switching, the polarity of each of the electric magnets 52 is gradually reversed, so that the rotor 53 reacts to the magnetic field of the stator 54 irrespective of its rotational position, so that it rotates in a constant direction (counterclockwise in the example of the drawing). Rotate On the other hand, when the direction of the current i to the brushes 56 and 56 is reversed, the rotor 53 rotates in the direction opposite to the predetermined direction.

Moreover, as the contacting position of the commutator 55 and the brushes 56 and 56 changes as shown typically to FIGS. 4A-4E by such a rotation operation of the DC motor 5, it respond | corresponds to the contact position. The induced electromotive force of each electric magnet 52 coil changes so that the motor current i, i.e., the supply current i from the controller 6 to the DC motor 5 is changed to the DC motor 5 as shown in FIG. The rotation angle is changed at substantially constant periods so as to correspond to the rotational angle of. 5A shows the state of change of the current i detected in the controller 6 based on the voltage drop across the resistor 14, and the waveform of this current i passes through the filter circuit 15 and is smooth. When the signal is released, the signal waveform i 'as shown in Fig. 5B is obtained.

Subsequently, as shown in Fig. 5C, the signal is amplified by the amplifying circuit 16, and this amplified signal i " is shaped into a square wave by the waveform shaping circuit 17, and the MPU (P) as a pulse signal p (p). 12) The number of input pulse signals is counted by the counter of the MPU 12, and the rotation angle of the DC motor 5, that is, the tilt angle of the mirror main body 4, is detected based on this count value. In the first embodiment, as shown in Figs. 5A to 5D, the pulse signal p is inputted once each time the rotation angle of the DC motor 5 changes by 60 degrees. Thus, the mirror main body 4 and the DC If the gear ratio of the reduction gear device which drives and connects the motor 5 is set to correspond to, for example, that the mirror angle changes by 10 degrees when the DC motor 5 rotates 20, the pulse signal p is 120 times. When counted, the inclination angle of the mirror body 4 is changed by 10 degrees. As shown in Fig. 5D, even if a noise component is included in the motor current i, the rotation angle of the DC motor 5 is accurately detected because there is no error in the number of pulse signals p after waveform shaping.

Therefore, as will be described later, the tilting angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller 6 based on the count value of the pulse signal p. However, since the DC motor 5 rotates by inertia even after the power supply is stopped, the tilt angle by this inertia rotation cannot be adjusted. Moreover, even after the DC motor 5 stops, the noise which becomes a so-called false pulse signal of the same shape as the motor 5 rotates may be counted. Hereinafter, a series of controls for tilting the movable part of the side mirror 1 of the first embodiment downward from the initial position and then tilting upward to almost return to the original initial position, and generation and removal of the noise during this control Explain about.

Fig. 6 is a timing diagram of power supply and generated pulse signals to DC motors 5R and 5L on the right and left sides. When the MPU 12 receives the selection state detection signal of the reverse gear from the gear selection position switch 9, the MPU 12 causes the DC motor 5R, A command is given to the driver circuit 11 to supply power to 5L for a predetermined time, for example, 2 seconds, and the driver circuit 11 supplies power according to the command. Even if the electric power supply is stopped at the same time, the DC motors 5R and 5L rotate inertia slightly even after the stop, so that the pulse signal 33 due to the inertia rotation is detected by the rotation angle detection circuits 13R and 13L. Since the movable part of each side mirror 1 and the DC motors 5R and 5L vary in ease of rotation, torque and the like, the sum of the number of rotation and inertia rotation pulse signals 31 and 33 during power supply is different from right to left. Moreover, the sum of the number of pulse signals 31 of rotation and the number of pulse signals 33 of inertia rotation during this downward power supply corresponds to the downward tilt rotation angle.

Next, when the MPU 12 receives the selection state detection signal from the reverse gear to the other gear from the gear selection position switch 9, the MPU 12 firstly moves only the left DC motor 5L to the left downward power. The driver circuit 11 transmits a control signal to the driver circuit 11 so as to rotate upward by the sum of the number of the rotation pulse signals 31 and the inertia rotation pulse signals 33 being supplied to return to the initial position. Power is supplied to the DC motor 5L. When the left DC motor 5L tilts upward by the start delay angle T, the MPU 12 sends a control signal to the driver circuit 11 to supply power to the right DC motor 5R. It is rotated upward by the sum of the number of rotation pulse signals 31 and the number of inertia rotation pulse signals 33 during the right downward power supply, so as to almost return to the initial position. The time taken to tilt by the start delay angle T at this time is a predetermined delay time. Moreover, this starting delay angle T is set in the range of 1/6 or more and 1/2 or less of the angle converted into the sum of the number of rotation pulse signals 31 and the inertia rotation pulse signal 33 during left downward power supply. Angle, for example set here to 1/4 angle. The tilt up to the start delay angle T is determined by the MPU 12 by counting the upward rotation pulse signal 32 by the power supply.

As described above, since the right DC motor 5R starts to rotate upwards later than the left DC motor 5L by the start delay angle T, the rotation by the power supply of the left DC motor 5L ends 35. After the inertia rotation is completed 36, the rotation by the power supply of the right DC motor 5R is terminated 37 and the inertia rotation is started. With the inertia rotation of the right DC motor 5R, a false pulse signal (noise) 34 is detected by the motor rotation angle detection circuit (rotation angle detection means) 13L connected to the left DC motor 5L. . In this case, since a pulse signal between the pulse signal 33 of the inertia rotation detected by the motor rotation angle detection circuit (rotation angle detection means) 13L on the left side and the false pulse signal 34 does not exist, a MPU ( 12 may identify the pulse signal 33 and false pulse signal 34 of the inertia rotation, and thus may be filtered out so as not to count the false pulse signal 34. Here, this filter function is built in the MPU 12. As a result, the MPU 12 can store only the sum of the rotation angle and the inertia rotation angle during the upward power supply as the upward tilt rotation angle, so that the amount of the false pulse signal 34 can be excluded from being calculated.

In other words, the delay time is set so that the time obtained by adding the delay time to the power supply time to the right DC motor 5R becomes longer than the time which inertia rotation is added to the power supply time to the left DC motor 5L. Therefore, after the inertia rotation of the left DC motor 5L is finished 36, the rotation by the power supply of the right DC motor 5R is terminated 37 and the inertia rotation is started.

When the above-described series of operation control is finished, the inclination angles of the left and right mirror bodies 4 and 4 are further inclined upward by the amount of inertia respectively from the initial position. Therefore, in the next time operation control, the inertia rotation amount is taken into consideration to execute the upward control to return to the position as close to the initial position as possible. Here, since the upward rotation angle by the power supply of each of the left and right sides is the same as the downward tilt rotation angle, the upward inertia rotation amount is the difference between the upward and downward directions of the tilt rotation angle. In consideration of the inertia rotation transfer, the specific next series of control is the downward tilting of the n + 1 th time in the n + 1 th operation control when the next time is the n th time and the next time the n th time is a series of control. The MPU 12 sends a control signal to the driver circuit 11 so as to rotate upward by subtracting the nth upward inertia rotation angle from the rotation angle to supply power to the DC motor 5. In this way, even when the operation control is executed a plurality of times, when the upward tilting is finished, the position is shifted only by the amount of the upturning inertia from the initial position, and always returns to the original initial position.

Therefore, according to the remote control type side mirror control apparatus of the first embodiment, the current i supplied to the DC motor 5 in accordance with the rotational operation of the DC motor 5 for adjusting the inclination angle of the mirror main body 4. ), The rotation angle of the DC motor 5, that is, the tilt angle of the mirror main body 4, is detected based on the change state of the current i. It is possible to accurately detect the inclination angle of the side mirror 1 with an inexpensive device, and control can be performed without the need for providing a sensor such as a device or a potentiometer. In this control, since the start of the upward tilt is left and right by a predetermined start delay angle, the pulse signal resulting from the rotation and the false pulse signal which is the noise can be identified, and only the pulse signal resulting from the rotation is controlled. By using, it is always possible to return to the position closest to the initial position. Moreover, since the signal which detects the gear selection state of a transmission is used as a start signal of downward and upward tilting, the movable part of the left and right side mirrors 1 and 1 is automatically moved to the initial position only by reversing the vehicle and making the rear gear backward. When the gear is shifted from the reverse to the other gear after the end of the reverse movement, the movable part of the left and right side mirrors 1 and 1 automatically tilts upward to return to the initial position, and the driver starts to operate the vehicle. And no hassle of adjusting the tilt angle.

In addition, since there is no need to secure an area for the sensor inside the side mirror 1, the request for miniaturization or improvement in design freedom is also satisfied. In addition, this control device can be mounted on the rear side of the mirror without the need for extensive machining, even for general electric remote control type mirrors in which the remote control operation switch is used to manually adjust the mirror angle. It is also possible to obtain an excellent effect of not impairing the appearance.

In the first embodiment, the rotation angle of the DC motor 5 is detected based on the change state of the current i supplied from the controller 6 to the DC motor 5, but the present invention is not limited thereto. It is also possible to detect the voltage applied between the terminals of (5) and to detect the rotation angle of the DC motor 5 based on the change state of this voltage.

In the first embodiment, a three-slot motor is used as the DC motor 5, but the present invention can be applied to, for example, four to two slot motors without being limited thereto, and also to a brushless motor.

Moreover, in the said 1st Embodiment, although the example applied to the door mirror was shown, you may apply to a fender mirror without being limited to this.

(2nd embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the second embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror downward from the initial position, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

7 and 2 show a control device for a motor vehicle remote control type side mirror according to a second embodiment of the present invention, and in Fig. 2, reference numeral 1 denotes a so-called side mirror (door mirror) provided at the lower right front pillar of the vehicle. The side mirror 1 has a casing 2 shaped like a clam shell, and the actuator assembly 3 is accommodated in the casing 2, and at the rear of the vehicle of the casing 2 almost over the entire surface. A mirror body 4 made of a flat mirror is disposed, and the mirror body 4 is mounted to the actuator assembly 3 via the base plate 25. And the angle of the up-down direction of the mirror main body 4 is respectively adjusted by the reduction gear unit which is not shown by operation of the DC motor 5 (DC motor: shown only in FIG. 7) built in the actuator assembly 3, respectively. It is composed. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. The DC motor which adjusts the horizontal angle of the mirror main body 4 is also attached to the actuator assembly 3 similarly.

The DC motor 5 is connected to a controller (control device) by an electrical wiring device (wiring harness). The controller is connected to a battery (not shown) which is a power source, and at the same time, at least a remote control operation switch 8 which is manually operated by a driver of a vehicle, and a gear selection position switch 9 which cooperates with operation of a gear switching lever (not shown). (Output signal from the gear selection state detecting means) is input, and according to the signals input from the switches 8 and 9 to the controller, the power supply to the DC motor 5 is adjusted, and the side mirror ( The tilt angle of the mirror body 4 of 1) is adjusted. The switches 8 and 9 may be referred to as external signal detecting means. The controller is the remainder except for the DC motor 5, the remote control operation switch 8 and the gear selection position switch 9 in FIG.

More specifically, the controller receives an output signal from the remote control operation switch 8 or the gear selection position switch 9 and outputs a control signal corresponding to this signal to the driver circuit 11. (micro processing unit) 12 is disposed, and is present on the DC motor 5 (left and right respectively in the vehicle body) by the driver circuit 11 receiving the control signal from the MPU 12, but only one side is shown in this figure. DC voltage is applied to the terminals, respectively, and the DC motor 5 is configured to rotate. With this configuration, the car driver operates the remote control operation switch 8 so that the tilt angle of the mirror body 4 in the up-down direction can be obtained so that an appropriate rear clock can be obtained in a substantially horizontal direction while sitting in the driver's seat during normal forward driving. Can be easily adjusted. The position of the mirror main body 4 from which the suitable rear view of a substantially horizontal direction is obtained in the state which sat in this driver's seat is an initial position. And automatic adjustment of the up-down inclination-angle of the mirror main body 4 corresponding to gear switching mentioned later can also be performed. Here, the driver circuit 11 corresponds to a power regulation circuit for adjusting the supply power to the DC motor 5, and also corresponds to control means for the MPU 12 to control the driver circuit 11. In addition, illustration of the memory, I / O interface, etc. in the controller is omitted.

Then, the controller detects the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5. ) (Rotation angle detection means). The motor rotation angle detection circuit 13 focuses on the supply current i fluctuating due to a change in the internal impedance caused by the rotational operation of the DC motor 5, and the DC motor is changed from the fluctuation state of the current i. The rotation angle of (5) is detected. Specifically, the resistor 14 for detecting the direct current (i) flowing from the driver circuit 11 to the DC motor 5 and the low pass for removing the high frequency component of the current waveform flowing through the resistor 14. An amplifier circuit composed of a filter circuit 15 made of a filter, capacitors 21a and 21b for removing a direct current component from an output from the filter circuit 15, and an amplifier for amplifying a signal from which the direct current component is removed. Waveform shaping circuit 17 for shaping output waveforms from 16a and 16b, limiters 22a and 22b, analog switches (A / S) 23, and amplifying circuits 16a and 16b so as to be square waves. It is provided. Here, the mirror main body 4 is tilted up or down by rotating one DC motor 5 forward or reverse. In the forward and reverse rotation of the DC motor 5, the drive current from the driver circuit 11 is reversed. The sign is reversed. Therefore, the capacitor 21a, 21b, the amplification circuits 16a, 16b, and the limiters 22a, 22b are constituted in two series according to their respective codes, and only one signal is selected by the A / S 23 to form a waveform shaping circuit. Send it to (17).

To describe the controller in more detail, the DC motor 5 used in the side mirror 1 of the second embodiment is, for example, a three-slot motor as shown in FIG. A rotor 53 having three electric magnets 52, 52, and 52 is mounted on the rotating shaft 51 of the motor 5 with an insulator interposed therebetween, and a stator 54 made of a permanent magnet is disposed outside thereof. . On the coaxial with the rotor 53, a commutator 55 for supplying current to the coils of the electric magnets 52 is disposed integrally with the rotor, and the brush is disposed so as to contact the outside of the commutator 55. 56, 56) are excreted.

When the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the direction of the current supplied from the brushes 56 and 56 to each electric magnet 52 through the commutator 55 is changed. By switching, the polarity of each of the electric magnets 52 is gradually reversed, so that the rotor 53 reacts to the magnetic field of the stator 54 irrespective of its rotational position, so that it rotates in a constant direction (counterclockwise in the example of the drawing). Rotate On the other hand, when the direction of the current i to the brushes 56 and 56 is reversed, the rotor 53 rotates in the direction opposite to the predetermined direction.

Moreover, as the contacting position of the commutator 55 and the brushes 56 and 56 changes as shown typically to FIGS. 4A-4E by such a rotation operation of the DC motor 5, it respond | corresponds to the contact position. The induced electromotive force of each electric magnet 52 coil changes so that the motor current i, i.e., the supply current i from the driver circuit 11 to the DC motor 5 is changed to the DC motor. In order to correspond to the rotation angle of (5), it fluctuates by a fixed period. 5A shows the state of change of the current i detected on the basis of the voltage drop across the resistor 14 in the controller, and if the waveform of this current i is filtered through the filter circuit 15, FIG. 5B. The signal waveform i 'as shown in Fig. 2 is obtained.

Subsequently, as shown in Fig. 5C, the signals are amplified by the amplifying circuits 16a and 16b, and the amplified signal i " is shaped into a square wave by the waveform shaping circuit 17 to form a pulse signal p. The number of input pulse signals is counted by the counter of the MPU 12, and the rotation angle of the DC motor 5, that is, the tilt angle of the mirror body 4, is detected based on the count value. In the second embodiment, as shown in Figs. 5A to 5D, the pulse signal p is input once every time the rotation angle of the DC motor 5 changes by 60 degrees. ) And the gear ratio of the reduction gear device which drives and connects the DC motor 5, for example, when the DC motor 5 is set to correspond to that the mirror angle changes by 10 degrees when the DC motor 5 rotates 20, the pulse signal p Is counted 120 times, the tilt angle of the mirror body 4 is changed by 10 degrees, as shown in FIG. As shown, even if the noise component is included in the motor current i, as shown in Fig. 5D, there is no error in the number of pulse signals p after waveform shaping, so that the rotation angle of the DC motor 5 is accurately detected.

Therefore, as will be described later, the tilting angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller 6 based on the count value of the pulse signal p. Below, the series of control which tilts the movable part of the side mirror 1 of this 2nd embodiment from the initial position downward, and then tilts it upwards to return to the original initial position to prevent inertia rotation from occurring during this control is performed. Explain how to brake.

A series of control starts is operation which makes a transmission gear reverse. When the MPU 12 receives the selection state detection signal of the reverse gear from the gear selection position switch 9, the MPU 12 causes the DC motor to change the inclination angle of the mirror body 4 downward from the initial position by a predetermined amount. A command is given to the driver circuit 11 to supply electric power to (5) for a predetermined time, for example, 2 seconds, and the driver circuit 11 stops supplying after supplying electric power as directed. The step of executing downward tilt by this electric power supply is a tilt phase. The predetermined amount of tilt angle from the initial position is an angle at which safety confirmation can be performed from the rear side downward when the vehicle is reversed, specifically, about 5 to 10 degrees. When the power supply is stopped, the braking is performed so that the power made up of the current of the reversed power and the current supplied to the DC motor 5 is supplied to the DC motor 5 for a predetermined first time T1 as described later. Takes This is the braking phase. In this way, downward tilting is finished. Here, the number of pulse signals of the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 during this downward power supply corresponds to the downward tilt rotation angle.

Thereafter, when the MPU 12 receives the selection state detection signal from the reverse gear to the other gear from the gear selection position switch 9, the MPU 12 sends the DC motor 5L to the rotation pulse signal during the downward power supply. The control circuit 11 transmits a control signal to the driver circuit 11 so as to rotate upward by a number to return to the initial position, so that the driver circuit 11 supplies power to the DC motor 5. This is the upward tilt phase. When the supply of the electric power is terminated to tilt upward by the downward tilt rotation angle, the braking step is performed, and the DC motor 5 is configured such that the electric power consisting of the reverse sign current and the tilt electric power current is for a predetermined first time T1. Braking is applied to prevent the inertia rotation. This ends the upward tilting. When the downward and upward tilting ends, the mirror body 4 returns to the initial position.

The above is a series of control which starts tilting of the mirror main body 4 by selection of a gear. Next, the braking step will be described.

Fig. 8 is a timing diagram of the operation of the driver circuit 11 and the DC motor 5 of the second embodiment. M (+) of the driver circuit 11 denotes the supply of electric power for tilting the mirror body 4 downward, and M (-) denotes the supply of electric power for tilting up. And H indicates power supply, and L indicates no power supply. Although not shown here, a rotation (downward) command is sent from the MPU 12 to the driver circuit 11 in time before the portion shown in this timing diagram, so that the driver circuit 11 powers for downward rotation. It is assumed that there is a control and motor operation that the supply is supplied to the DC motor 5 and the DC motor 5 starts to rotate downward.

8 shows where the DC motor 5 rotates downward. When the DC motor 5 tilts the side mirror main body 4 by a predetermined amount, the reverse rotation command is sent from the MPU 12 to the driver circuit 11. The driver circuit 11 stops the downward rotation power supply so far, and supplies the upward rotation power which consists of an inverse current with the electric current of the supplied electric power. When this upward rotational power is supplied for a predetermined first time T1, a stop command is sent from the MPU 12 to the driver circuit 11 to stop the power supply.

The operation of the DC motor 5 when power is supplied in this way is as follows. When the reverse rotation command is issued from the MPU 12, the power code is reversed. In the DC motor 5, the inertia force to be inertia rotates and the driving force of the reverse rotation is balanced so that the rotation of the DC motor 5 is stopped at that time.

Since the first time T1 is determined by the type of the DC motor 5 or the driver circuit 11 or the rotation moment of the mirror main body 4, for example, inertia rotation does not occur when it is 10 to 30 msec. The DC motor 5 can be surely tightened so as to prevent the reverse rotation from occurring.

In the vehicle side mirror 1 control method and control device of the second embodiment, the power supply to the DC motor 5 for tilting the mirror main body 4 is terminated and the current of the reverse power is not the current of the supply power. Since the electric power consisting of the power supply is supplied to the DC motor 5 for the first time T1, the DC motor 5 is reliably stopped at the time when the movable portion of the side mirror 1 is tilted by a predetermined amount, and inertia rotation does not occur. You can do that. Therefore, when the DC motor 5 rotates, it is possible to reliably count the rotation pulse signal, and it is possible to control the side mirror 1 to always return to the initial position, so that the up and down tilt control of the side mirror 1 is performed a plurality of times. Even if it is implemented, it will not be greatly removed from the initial position.

In addition, since it is not necessary to secure an area for the sensor inside the side mirror 1, a request for miniaturization and improved design freedom is also satisfied. In addition, this control device can easily be mounted afterwards without the need for extensive machining, even for a general electric remote control mirror that is operated by a remote control switch to manually adjust the mirror angle. It is also possible to obtain an excellent effect of not letting it happen.

In the second embodiment, the rotation angle of the DC motor 5 is detected based on the change state of the current i supplied from the controller to the DC motor 5, but the DC motor 5 is not limited thereto. It is also possible to detect the voltage applied between the terminals of and to detect the rotation angle of the DC motor 5 based on the change state of this voltage. In addition, the left and right two side mirrors may be controlled by one MPU 12.

In the second embodiment, a three-slot motor is used as the DC motor 5, but the present invention can be applied to, for example, four to two slot motors without being limited thereto, and also to a brushless motor. As the switch for driving the DC motor 5, the remote control operation switch 8 in front of the driver may be used in addition to the gear selection of the transmission gear. In this case, the remote control operation switch 8 may be configured to drive the DC motor 5 directly via a relay instead of through the MPU 12.

Moreover, although the example applied to the door mirror was shown in the said 2nd Embodiment, you may apply to a fender mirror without being limited to this.

(Third embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the third embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror from the initial position downward, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. The control apparatus of the motor vehicle remote control type side mirror of the third embodiment has the same device configuration as that of the second embodiment, and the control method is also substantially the same as that of the second embodiment, and only the parts of the braking step are different. Explain mainly. Here, the same elements as in the second embodiment will be described with reference to the same drawings.

9 is a timing diagram of the operation of the driver circuit 11 and the DC motor 5 of the third embodiment.

In the control apparatus of the motor vehicle remote control type side mirror of the third embodiment, when the DC motor 5 tilts the side mirror main body 4 by a predetermined amount, a stop command is sent from the MPU 12 to the driver circuit 11. do. The driver circuit 11 stops supplying the downturn power until now. When the predetermined second time T2 elapses from the stop of power supply, the reverse rotation command is sent from the MPU 12 to the driver circuit 11. The driver circuit 11 supplies the up-rotational power which consists of an inverted current with the down-rotational current to the DC motor 5 for a predetermined 1st time T1 '. Then, a stop command is sent from the MPU 12 to the driver circuit 11 to stop the upward rotation power supply.

The operation of the DC motor 5 when power is supplied in this way is as follows. In the second time T2 from the first stop command of the MPU 12 until the reverse command is issued, the DC motor 5 performs the inertia rotation, but because of the relatively fast rotation, the pulse signal can be counted during this time. . Then, when the reverse rotation command is issued from the MPU 12, the power code is reversed. In the DC motor 5, the inertia force to be inertia rotated and the driving force of the reverse rotation is balanced so that the rotation of the DC motor 5 stops at that time. .

Since the DC motor 5 rotates the inertia only by the second time T2, a smaller force than the second embodiment is sufficient to stop the inertia rotation. Therefore, when the first time T1 'is 5 to 10 msec, the DC motor 5 can be reliably closed so that inertia rotation does not occur, and at the same time, the reverse rotation can also be prevented from occurring. When the second time T2 is set to 10 to 60 msec, the pulse coefficient due to the inertia rotation of the DC motor 5 during this time is preferable.

In the third embodiment, the rotation angle of the DC motor 5 is detected based on the change state of the current i supplied from the controller to the DC motor 5, but the DC motor 5 is not limited thereto. It is also possible to detect the voltage applied between the terminals of and to detect the rotation angle of the DC motor 5 based on the change state of this voltage. In addition, the left and right two side mirrors may be controlled by one MPU 12.

Moreover, although the 3rd slot motor is used as the DC motor 5 in the said 3rd Embodiment, it is not limited to this, For example, it is applicable also to the motor of 4 to 2 slots, and it is applicable also to a brushless motor. As the switch for driving the DC motor 5, the remote control operation switch 8 in front of the driver may be used in addition to the gear selection of the transmission gear. In this case, the remote control operation switch 8 may be configured to drive the DC motor 5 directly via a relay instead of through the MPU 12.

In addition, in the said 3rd Embodiment, although the example applied to the door mirror was shown, you may apply to a fender mirror without being limited to this.

(4th Embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the fourth embodiment has the same configuration as that of the first embodiment, and the movable part of the side mirror is tilted downward from the initial position, and then tilted upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

10 and 2 show a control device for a motor vehicle remote control type side mirror according to a fourth embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a so-called side mirror (door mirror) installed at the lower right front pillar of the vehicle. This side mirror 1 has a shell 2 in which an actuator assembly 3 is accommodated. Behind this shell 2, the mirror main body 4 which becomes a flat mirror is arrange | positioned substantially over the whole surface, and this mirror main body 4 is attached to the said actuator assembly 3 via the base plate 25. .

Although not shown, the side mirror 1 is provided with a flashing light.

The up and down angles of the mirror body 4 are configured to be adjusted through a reduction gear device (not shown) by the operation of the DC motor 5 (direct current motor: shown in FIG. 10 only) embedded in the actuator assembly 3, respectively. do. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. A DC motor (not shown) for adjusting the horizontal angle of the mirror body 4 is similarly mounted to the actuator assembly 3.

The DC motor 5 is connected to the motor driver 11 via the resistor 12. This motor driver 11 is connected to the MPU 6 which is a control means. The MPU 6 is connected to a remote control operation switch 8 which is manually operated by a driver of a vehicle, and a gear selection position switch 9 (gear selection state detecting means) which cooperates with the gear switching lever operation.

As shown in FIG. 10, the MPU 6 controls the motor driver 11 in accordance with a signal input from the remote control operation switch 8 or the gear selection position switch 9. The motor driver 11 adjusts the power supply to the DC motor 5 based on the control signal from the MPU 6 and adjusts the inclination angle of the mirror body 4 of the side mirror 1. Here, in the fourth embodiment, the gear select switch 9 corresponds to the external signal detecting means.

The motor rotation angle detection circuit 10, which is a rotation angle detection means, is connected to a predetermined position of the motor driving circuit 19 formed by the DC motor 5, the motor driver 11, and the resistor 12. The rotation angle detection circuit 10 detects a voltage change applied to the resistor 12 in the motor drive circuit 19 as a waveform signal.

This waveform signal is generated as follows. According to the rotation operation of the DC motor 5, the contact position of the commutator and the brush in the motor changes. In correspondence with the contact position, the induced electromotive force of the plurality of electromagnet coils formed in the motor is changed. As a result, the supply current i in the motor drive circuit 19 fluctuates at a substantially constant period so as to correspond to the rotation angle of the DC motor 5. Therefore, a change also occurs in the voltage drop of the resistor 12 end of the motor drive circuit 19. When the voltage change is detected over time, it becomes a waveform signal in a pulse state and is detected.

In the fourth embodiment, the side mirror 1 is provided with a flashing light. Therefore, the current supplied to the motor is filtered so that the pulse signal resulting from the rotation of the DC motor 5 does not adversely affect the operation of the flashing light. The rotation angle detection circuit 10 includes a low pass filter 13, high pass filters 14a and 14b, amplifiers 15a and 15b, limiters 16a and 16b, analog switches 17 and waveform shaping circuits. 18).

The low pass filter 13 removes high frequency components among the noise components included in the waveform signal. The high pass filters 14a and 14b remove low frequency components from noise components included in the waveform signal.

In the fourth embodiment, two systems of high pass filters are used. This is because the load applied to the DC motor 5 is different when the mirror body 4 is tilted down and when tilted up, and thus it is necessary to change the supply current at the time of forward rotation and reverse rotation. When the supply current to the DC motor 5 is changed, the voltage change of the resistor 12 also changes. Therefore, the filter characteristics of the forward-only high pass filter 14a and the reverse-only high pass filter 14b are set in advance so as to be applied to voltage changes respectively detected during forward and reverse rotation of the DC motor 5. .

The high pass filters 14a and 14b are connected to amplifiers 15a and 15b, respectively. Each amplifier 15a, 15b amplifies a waveform signal from which noise components are removed from the low pass filter 13 and the high pass filter 14a, 14b.

In other words, the voltage change in the resistor 12 detected by the motor rotation angle detection circuit is as small as a few hundred mv. Therefore, in order to shape the waveform signal into a square wave in the waveform shaping circuit 18, an amplifier is used to amplify the waveform change by several v to tens of v to reach a threshold value of the device used in the waveform shaping circuit 18. do.

Each amplifier 15a, 15b is connected to the analog switch 17 via limiters 16a, 16b, respectively.

The analog switch 17 is also connected to the MPU 6. The analog switch 17 outputs one of the waveform signals input from the amplifiers 15a and 15b of the two systems to the waveform shaping circuit 18 based on the control signal input from the MPU 6.

The waveform shaping circuit 18 shapes the waveform signal input from the analog switch 17 into a square wave and outputs it to the MPU 6 as a digital pulse signal.

A control method of the motor vehicle remote control side mirror of the fourth embodiment will be described.

When the motor vehicle driver selects the reverse gear of the transmission as the shift lever or the like to reverse the vehicle, the downhill start signal is automatically input to the MPU 6 from the gear select position switch 9. The MPU 6 receives the downward tilt start signal from the gear selection position switch 9 and outputs a control signal corresponding to this signal to the motor driver 11.

The motor driver 11 which received the control signal from the MPU 6 applies a predetermined | prescribed DC voltage to the DC motor 5 terminal of both the left and right side mirrors 1, respectively. The DC motor 5 receiving the voltage starts forward rotation to drive the actuator assembly 3 and to tilt the mirror body 4 downward.

The rotation angle detection circuit 10 starts to detect the voltage change applied to the resistor 12 of the motor drive circuit 19 as a waveform signal as soon as the DC motor 5 starts to rotate. The detected waveform signal includes not only a desired specific pulse signal generated by the rotation of the DC motor 5 but also a high frequency component generated immediately after this specific pulse signal or a low frequency component given in consideration of the influence on other electronic devices. .

In the detected waveform signal, a high frequency component is removed from noise components included in the waveform signal inputted to the low pass filter 13. The filter characteristic of the low pass filter 13 is set to a higher frequency region than the desired specific pulse signal.

The waveform signal from which the high frequency component has been removed is input to the forward-only high pass filter 14a and the reverse-only high pass filter 14b, respectively. The filter characteristics of each of these high pass filters are set in advance so as to be applied at the time of forward rotation and reverse rotation of the DC motor 5, respectively. Therefore, even when the voltage level difference of the waveform signal at the time of forward rotation and reverse rotation of the DC motor 5 is large, the two high-pass filters remove the low frequency components corresponding to each voltage level, respectively.

The low frequency component is removed from the waveform signal input to each high pass filter by at least one high pass filter. The waveform signal passing through the two high pass filters is waveform-limited by the limiters 16a and 16b and input to the analog switch 17.

The MPU 6 uses only the specific pulse signal input from the high pass filter 14a set as the filter characteristic at forward rotation, among the waveform signals input from the high pass filters 14a and 14b. 18) to control the analog switch 17 to output.

The specific pulse signal input to the waveform shaping circuit 18 is converted into a rectangular digital pulse signal and then output to the MPU 6. Since this digital pulse signal originates only from the specific pulse signal which generate | occur | produced by the rotation of the DC motor 5, the rotation angle of the DC motor 5 can be calculated correctly by counting this digital pulse signal.

The MPU 6 counts the digital pulse signals input from the waveform shaping circuit 18 of the motor rotation angle detection circuit 10, and sets a predetermined number of pulse signals per rotation of the motor, the rotation speed of the DC motor 5, and the mirror. Relationship between tilt angle, mirror angle in normal operation, mirror angle in reverse operation, coefficient for correcting inertia rotation of DC motor 5, mirror tilt from the number of pulse signals input from motor rotation angle detection circuit 10, and the like. Calculate the angle

In the fourth embodiment, the DC motor 5 generates six pulse signals per one revolution. If the gear ratio of the reduction gear unit connecting the mirror main body 4 and the DC motor 5 is set to correspond to the mirror angle changing 10 degrees when the DC motor 5 rotates 20, for example, the digital pulse When the signal is counted 120 times, the tilt angle of the mirror body 4 is changed by 10 degrees.

The mirror angle in normal driving refers to the angle of the side mirror in which the driver can visually check the vehicle behind. Also, the mirror angle at the time of reversing is a mirror angle set by the driver so that the driver can visually check the rear wheel ground part when the vehicle is reversed. The driver sets these angles in advance and stores them in the MPU 6.

The MPU 6 controls the motor driver so that the mirror main body 4 stops accurately at the mirror angle when reversing based on the calculation result.

After the mirror body 4 stops at the mirror angle at the time of reversing, the driver reverses the vehicle while checking the rear lower side with this mirror. When reverse is completed, the driver operates the shift lever to select a gear other than the reverse gear. In this way, when another gear is selected from the reverse gear, the rising tilt start signal is automatically input to the MPU 6 from the gear selection position switch 9.

The MPU 6 receives the rising tilt start signal from the gear selection position switch 9, and outputs a control signal corresponding to this signal to the motor driver 11. The motor driver 11 receiving the control signal from the MPU 6 applies a predetermined DC voltage to the terminals of the DC motor 5 of both the left and right side mirrors 1 in the negative and negative directions as it descends. The DC motor 5 applied with the voltage starts reverse rotation to drive the actuator assembly 3 and to tilt the mirror body 4 upward.

The motor rotation angle detection circuit 10 detects the voltage change applied to the resistor 12 of the motor drive circuit 19 as a waveform signal as in the case of the downhill tilt. In the detected waveform signal, high frequency components and low frequency components, which are noise components, are removed by the low pass filter 13 and the high pass filters 14a and 14b.

The MPU 6 controls the analog switch 17 to output only the specific pulse signal input from the high pass filter 14b set as the filter characteristic at the time of reverse rotation among the waveform signals to the waveform shaping circuit 18. .

The specific pulse signal input to the waveform shaping circuit 18 is converted into a rectangular digital pulse signal and then output to the MPU 6. The MPU 6 counts the digital pulse signal input from the waveform shaping circuit 18 of the motor rotation angle detection circuit 10 and calculates the tilt angle of the mirror as in the down tilt. The MPU 6 controls the motor driver so that the mirror main body 4 stops exactly at the mirror angle in normal operation based on the calculation result.

Therefore, according to the control device of the vehicle remote control type side mirror of the fourth embodiment, the current supplied to the DC motor 5 in accordance with the rotation operation of the DC motor 5 for adjusting the inclination angle of the mirror main body 4. Paying attention to variation in (i), the rotation angle of the DC motor 5, that is, the tilt angle of the mirror body 4 can be calculated very accurately based on the change state of the current i.

Therefore, the inclination angle of the side mirror 1 can be detected accurately and control can be performed easily by a low cost apparatus, without providing a sensor, such as an encoder and a potentiometer, inside the side mirror 1.

In this control, only the specific pulse signal is extracted from the waveform signal detected by the motor drive circuit 19 using the low pass filter 13 and the high pass filter 14. Therefore, the inclination angle of the mirror body 4 can be calculated very accurately.

Since the signal which detects the gear selection state of the transmission is used as the start signal of the downhill and the uphill, the movable part of the side mirror 1 is automatically moved downward from the initial position by simply turning the gear back to reverse the vehicle. When the gear is shifted from the reverse to the other gear after the end of the reverse movement, the movable part of the side mirror 1 is automatically tilted upward to return to the initial position, and the starting operation of the driver and the cumbersome adjustment of the inclination angle are performed. There is no need for this.

In addition, since there is no need to secure an area for the sensor inside the side mirror 1, the request for miniaturization or improvement in design freedom is also satisfied. In addition, this control device can be mounted on the rear side of the mirror without the need for extensive machining, even for general electric remote control type mirrors in which the remote control operation switch is used to manually adjust the mirror angle. It is also possible to obtain an excellent effect of not impairing the appearance.

In the fourth embodiment, the rotation angle of the DC motor 5 is detected based on the voltage change state in the resistor 12 of the current i supplied from the MPU 6 to the DC motor 5. However, without being limited thereto, it is also possible to directly detect the voltage change applied between the terminals of the DC motor 5 and to detect the rotation angle of the DC motor 5 based on the change state of the voltage.

Moreover, although the example which applied this invention to the door mirror was shown in the said 4th Embodiment, it is also possible to apply to a fender mirror without being limited to this.

(5th Embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the fifth embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror from the initial position downward, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

FIG. 11 and FIG. 2 show a control device of the motor vehicle remote control type side mirror of the fifth embodiment of the present invention, and in FIG. 2, reference numeral 1 denotes a so-called side mirror (door mirror) installed at the lower right front pillar of the vehicle. The side mirror 1 has a casing 2 shaped like a clam shell, and the actuator assembly 3 is accommodated in the casing 2, and at the rear of the vehicle of the casing 2 almost over the entire surface. A mirror body 4 made of a flat mirror is disposed, and the mirror body 4 is mounted to the actuator assembly 3 via the base plate 25. And the angle of the up-down direction of the mirror main body 4 is respectively adjusted by the reduction gear unit not shown by operation of the DC motor 5 (DC motor: shown only in FIG. 11) built in the actuator assembly 3, respectively. It is composed. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. The DC motor which adjusts the horizontal angle of the mirror main body 4 is also attached to the actuator assembly 3 similarly.

The DC motor 5 is connected to a controller (control device) by an electric wiring device. The controller is connected to the battery 30 which is the power source of the vehicle body, and at the same time, the gear selection position which is linked to the operation of the remote control operation switch 8 manually operated by the driver of the vehicle and the gear switching lever (not shown). An output signal from the switch 9 (gear selection state detecting means) is input, and according to the signals input from the switches 8 and 9 to the controller, the supply power to the DC motor 5 is adjusted, The inclination angle of the mirror body 4 of the side mirror 1 is adjusted. The switches 8 and 9 may be referred to as external signal detecting means. The controller is the remainder except for the battery 30, the DC motor 5, the remote control operation switch 8 and the gear selection position switch 9 in FIG.

More specifically, the controller receives an output signal from the remote control operation switch 8 or the gear selection position switch 9 and outputs a control signal corresponding to this signal to the driver circuit 11. (micro processing unit) 12 is arranged, and is present on the DC motor 5 (left and right respectively in the vehicle body) by the driver circuit 11 which receives the control signal from the MPU 12, but only one side is shown in FIG. DC voltage is applied to the terminals, respectively, and the DC motor 5 is configured to rotate. This DC voltage is supplied from the battery 30 to the constituent circuit 11. In this configuration, the car driver operates the remote control operation switch 8 so that the tilt angle of the mirror body 4 in the vertical direction can be obtained so as to obtain a suitable rear clock in a substantially horizontal direction while sitting in the driver's seat during normal forward driving. Can be easily adjusted. The position of the mirror main body 4 from which the suitable rear view of a substantially horizontal direction is obtained in the state which sat in this driver's seat is an initial position. And automatic adjustment of the up-down inclination-angle of the mirror main body 4 corresponding to gear switching mentioned later can also be performed. Here, the driver circuit 11 corresponds to a power regulation circuit for adjusting the supply power to the DC motor 5, and also includes a control means for the MPU 12 to control the driver circuit (11). In addition, illustration of the memory, I / O interface, etc. in the controller is omitted.

Here, the MPU 12 includes a monitor circuit for monitoring the voltage of the battery 30. This monitoring circuit monitors the voltage of the battery 30 and issues a supply command to the control means in the same MPU 12 only when this voltage is greater than a predetermined voltage, thereby controlling to supply power to the DC motor 5. If the voltage of the battery 30 is less than or equal to the predetermined value, the monitor circuit does not issue a power supply command to the control means, so that the DC motor 5 does not rotate. That is, when the power supply voltage is less than or equal to the predetermined voltage, control is performed to prohibit driving of the movable part.

Then, the controller detects the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5. (Rotation angle detecting means). The motor rotation angle detection circuit 13 focuses on the change in the supply current i due to the change of the internal impedance caused by the rotational operation of the DC motor 5, and the DC motor is changed from the fluctuation state of the current i. The rotation angle of (5) is detected.

Specifically, the resistor 14 for detecting the direct current (i) flowing from the driver circuit 11 to the DC motor 5 and the low pass for removing the high frequency component of the current waveform flowing through the resistor 14. An amplifier circuit composed of a filter circuit 15 made of a filter, capacitors 21a and 21b for removing a direct current component from an output from the filter circuit 15, and an amplifier for amplifying a signal from which the direct current component is removed. Waveform shaping circuit 17 for shaping output waveforms from 16a and 16b, limiters 22a and 22b, analog switches (A / S) 23, and amplifying circuits 16a and 16b so as to be square waves. It is provided. In this case, the mirror main body 4 is tilted up or down by forward or reverse rotation using only one DC motor 5. In the forward and reverse rotation of the DC motor 5, the driver circuit 11 is rotated. The driving current sign of is reversed. Therefore, the capacitor 21a, 21b, the amplification circuits 16a, 16b, and the limiters 22a, 22b are constituted in two series according to their respective codes, and only one signal is selected by the A / S 23 to form a waveform shaping circuit. Send it to (17).

To describe the controller in more detail, the DC motor 5 used in the side mirror 1 of the fifth embodiment is, for example, a three-slot motor as shown in FIG. A rotor 53 having three electric magnets 52, 52, and 52 is mounted on the rotating shaft 51 of the motor 5 with an insulating part interposed therebetween, and a stator 54 made of a permanent magnet is disposed outward from the rotor 53. . On the coaxial with the rotor 53, a commutator 55 for supplying current to the coils of the electric magnets 52 is disposed integrally with the rotor, and the brush is disposed so as to contact the outside of the commutator 55. 56, 56) are excreted.

When the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the direction of the current supplied from the brushes 56 and 56 to each electric magnet 52 through the commutator 55 is changed. By switching, the polarity of each of the electric magnets 52 is gradually reversed, so that the rotor 53 reacts to the magnetic field of the stator 54 irrespective of its rotational position, so that it rotates in a constant direction (counterclockwise in the example of the drawing). Rotate On the other hand, when the direction of the current i to the brushes 56 and 56 is reversed, the rotor 53 rotates in the direction opposite to the predetermined direction.

Also, as shown in Figs. 4A to 4E, the contact positions of the commutator 55 and the brushes 56 and 56 are changed by the rotational operation of the DC motor 5, and thus the contact positions thereof are changed. Correspondingly, the induced electromotive force of each of the coils of the electric magnet 52 changes, and as shown in Fig. 5A, the motor current i, that is, the supply current i from the driver circuit 11 to the DC motor 5 is DC. In order to correspond to the rotation angle of the motor 5, it fluctuates in a substantially constant period. 5A shows the state of change of the current i detected on the basis of the voltage drop across the resistor 14 in the controller, and if the waveform of this current i is filtered through the filter circuit 15, FIG. 5B. The signal waveform i 'as shown in Fig. 2 is obtained.

Subsequently, as shown in Fig. 5C, the signals are amplified by the amplifying circuits 16a and 16b, and the amplified signal i " is shaped into a square wave by the waveform shaping circuit 17 to form a pulse signal p. The number of input pulse signals is counted by the counter of the MPU 12, and the rotation angle of the DC motor 5, that is, the tilt angle of the mirror body 4, is detected based on the count value. In the fifth embodiment, as shown in Figs. 5A to 5D, the pulse signal p is input once every time the rotation angle of the DC motor 5 changes by 60 degrees. And the gear ratio of the reduction gear device which drives and connects the DC motor 5, for example, so that the mirror angle changes by 10 degrees when the DC motor 5 rotates 20 degrees, the pulse signal p is When counted 120 times, the inclination angle of the mirror body 4 is changed by 10 degrees, as shown in Fig. 5A. It is a noise component included in the motor current (i) also is a waveform shaped pulse signal (p) after the steps shown in Fig. 5D, since there is no DC error rotation angle of the motor 5 is accurately detected as described.

Therefore, as will be described later, the tilt angle of the mirror main body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller 6 based on the count value of the pulse signal p. Below, a series of control which tilts the side mirror 1 movable part of this 5th Embodiment from the initial position downward, and tilts it upward will return to an original initial position substantially will be demonstrated.

A series of control starts is operation which makes a transmission gear reverse. When the MPU 12 receives the selection state detection signal of the reverse gear from the gear selection position switch 9, when the monitor circuit included in the MPU 12 monitors the voltage of the battery 30 and is larger than the predetermined voltage, In the MPU 12, a power supply command is issued from the monitor circuit to the control means to execute the power supply described below. When the voltage is below a predetermined voltage, the power supply command is not issued. Keep 4) stopped.

Here, the predetermined voltage is the lowest voltage among the voltages at which the DC motor 5 can reliably drive the mirror body 4 by a predetermined amount according to the instruction from the MPU 12, or a pulse that can be counted by the MPU 12. What is necessary is just to set the voltage higher than the higher of the two voltages of the lowest voltage among the voltage of the battery 30 which can generate the said pulse signal which has an amplitude. Since the amplitude of the pulse signal decreases when the voltage of the battery 30 driving the DC motor 5 decreases, the MPU 12 can count the pulse signal when the voltage of the battery 30 falls below an arbitrary voltage value. There will be no. Since the predetermined voltage varies depending on the type of the mirror body 4, the DC motor 5, and the MPU 12, the predetermined voltage is set for each type of the mirror body 4, the DC motor 5, and the MPU 12. . Moreover, since the movement of the mirror main body 4 and the DC motor 5 deteriorates with time, it is preferable to set predetermined voltage to a sufficient value, and 12-16V is specifically preferable.

As a result of monitoring, if the voltage of the battery 30 is greater than the predetermined voltage, the monitor circuit issues a power supply command to the control means, and then the MPU 12 moves the tilt angle of the mirror body 4 downward by a predetermined amount from the initial position. A command is given to the driver circuit 11 to supply electric power to the DC motor 5 for a predetermined time, for example, 2 seconds, and the driver circuit 11 stops the supply after supplying electric power according to the command. The predetermined amount of tilt angle from the initial position is an angle at which the safety confirmation can be performed behind the vehicle at the time of reversing the vehicle, specifically, about 5 to 10 degrees. In this way, downward tilting is finished. Here, the number of pulse signals of the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 during this downward power supply corresponds to the downward tilt rotation angle, and is stored by the MPU 12 as a control means. At this time, the number of pulse signals due to the inertia rotation of the DC motor 5 after the end of the power supply is included in the downhill rotation angle.

After that, when the MPU 12 receives the selection state detection signal from the reverse gear to the other gear from the gear selection position switch 9, the MPU 12 monitors the battery 30 voltage. If the voltage of the battery 30 is lower than or equal to the predetermined voltage, the mirror main body 4 is kept in a stationary state without performing power supply. If the voltage of the battery 30 is greater than the predetermined voltage, the monitor circuit in the MPU 12 issues a power supply command to the control means, and the control means further stores the DC motor by the number of rotation pulse signals during the stored down power supply. The control signal is transmitted to the driver circuit 11 to rotate (5) upward to return to the initial position, and the driver circuit 11 supplies electric power to the DC motor 5 to tilt upward by the downward tilt rotation angle. Upward tilting ends with supply. The number of pulse signals of the DC motor 5 rotation (including inertia rotation) detected by the upward tilt attempt motor rotation angle detection circuit 13 is stored in the MPU 12 as the upward tilt angle, and is used for the next down tilt control. Is used. When the downward and upward tilting ends, the mirror body 4 returns to the initial position.

The above is a series of control which starts tilting of the mirror main body 4 by selection of a gear.

In the vehicle side mirror 1 control method and control apparatus of the fifth embodiment, when the monitor circuit in the MPU 12 monitors the battery 30 voltage and is less than or equal to the predetermined voltage, the side without driving the DC motor 5 is performed. The mirror body 4, which is the movable portion of the mirror 1, is kept in a stationary state. Therefore, when the voltage of the battery 30 decreases and the mirror main body 4 becomes a voltage which is not normally tilted, the mirror main body 4 is not driven. Therefore, the mirror main body 4 does not stop at an abnormal position. Similarly, even when the voltage of the battery 30 drops and the magnitude of the rotation pulse signal of the DC motor 5 becomes small and counting becomes impossible, the power supply command is not sent from the monitor circuit to the control means. No stop is performed and abnormal operation control is not executed.

Here, the monitor circuit of the fifth embodiment monitors the voltage of the battery 30 when it receives a signal from the gear selection position switch 9 to determine whether it is larger than a predetermined voltage, but may monitor the voltage of the battery 30 at all times. The determination signal (power supply command when large) may be transmitted to the constant control means at the time of constant monitoring or may be transmitted when the signal from the gear selection position switch 9 is received. The timing at which the DC motor 5 starts to be driven is not limited to when the signal is input from the gear selection position switch 9, and the timing from which the signal from the remote control operation switch 8 is input or the input timing of other signals is also limited. Does not matter. The controller configuration is not limited to that shown in Fig. 11, for example, the limiters 22a and 22b may be omitted, or the A / S 23 may be omitted with the two series as the first series, or another component may be added. Does not matter. The method of controlling power supply to the DC motor 5 is not limited to the method of the fifth embodiment, but may be controlled while measuring the inclination angle of the mirror body 4 with a sensor, for example. When monitoring by the monitor circuit that the voltage of the battery 30 is below the predetermined voltage, a device for informing the driver that the voltage is below the predetermined voltage, for example, an alarm may be provided.

(6th Embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the sixth embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror from the initial position downward, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

12 and 2 show a control device for a motor vehicle remote control type side mirror according to a sixth embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a so-called side mirror (door mirror) provided at the lower right front pillar of the vehicle. This side mirror 1 has a shell 2 in which an actuator assembly 3 is accommodated. At the rear of the shell 2, a mirror body 4 made of a flat mirror is disposed almost over the entire surface, and the mirror body 4 is attached to the actuator assembly 3 via the base plate 25. do.

The up and down angles of the mirror body 4 are controlled by the reduction gear unit (not shown) by the operation of the DC motor 5 (direct current motor: only shown in FIG. 12), which is incorporated in the actuator assembly 3, respectively. It is composed. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. A DC motor (not shown) for adjusting the horizontal angle of the mirror body 4 is similarly mounted to the actuator assembly 3.

The DC motor 5 is connected to the motor driver 11 via the resistor 12. This motor driver 11 is connected to the MPU 6 which is a control means. The MPU 6 is connected to a remote control operation switch 8 that is manually operated by the driver and a gear selection position switch 9 that cooperates with the gear switching lever operation.

A motor rotation angle detection circuit 10 serving as a rotation angle detection means is connected to a predetermined position of the motor driving circuit 19 formed by the DC motor 5, the motor driver 11, and the resistor 12. The rotation angle detection circuit 10 detects a voltage change applied to the resistor 12 in the motor drive circuit 19 as a waveform signal.

This waveform signal includes a specific pulse signal generated by the rotation of the DC motor 5. This specific pulse signal is generated as follows. As the DC motor 5 rotates, the contact position of the commutator and the brush in the DC motor 5 changes.

In correspondence with the contact position, the induced electromotive force of the electromagnet coil formed in plural in the DC motor 5 is changed. As a result, the supply current i in the motor drive circuit 19 fluctuates at a substantially constant period so as to correspond to the rotation angle of the DC motor 5.

Therefore, a change also occurs in the voltage drop of the resistor 12 end of the motor drive circuit 19. When the voltage change is detected over time, it becomes a waveform signal in a pulse state and is detected. Immediately after this specific pulse signal, a high frequency component having a reverse polarity with the specific pulse signal is generated.

The rotation angle detection circuit 10 includes a low pass filter 13, a DC cutter 14, an amplifier 15, a limiter 16, and a waveform shaping circuit 17.

The low pass filter 13 removes the high frequency component of the waveform signal, and the DC cutter 14 extracts the desired pulse signal included in the waveform signal by removing the DC component.

The amplifier 15 selects and uses either a non-inverting amplifier or an inverting amplifier according to the characteristics of the DC motor 5, the position at which the waveform signal is to be detected, the filter characteristics of the filter, or the like.

For example, in the first embodiment where a non-inverting amplifier is used for the amplifier 15, the rotation angle detection circuit 10 is provided between the motor 5 and the resistor 12 connected to the anode side of the motor driver 11. The voltage change of the drive circuit 19 is detected as a waveform signal. 13A and 13B show waveform signals detected by the rotation angle detection circuit 10 from the drive circuit 19 in this case.

13A is a waveform signal obtained from the DC motor 5 at the forward rotation, and FIG. 13B is a waveform signal obtained from the DC motor 5 at the reverse rotation. The waveform signal during forward rotation and the waveform signal during reverse rotation show a waveform shape that is substantially symmetrical up and down in that the polarity of the voltage applied to the DC motor 5 is reversed.

13A and 13B, a and a 'are specific pulse signals generated by the rotation of the DC motor 5, b and b' are high frequency components generated immediately after this specific pulse signal, and c and c 'are Pulse signal generated by ringing phenomenon of high frequency components.

The filters 13 and 14 used in the motor rotation angle detection circuit 10 extract only a specific pulse signal a when the DC motor 5 rotates forward, and when the DC motor 5 reverses rotation. A pass allow band is set so that only the high frequency component b 'can be extracted. Each pulse signal extracted in this way has the same polarity. Therefore, it can be amplified by one amplifier.

The specific pulse signal a or high frequency component b 'extracted by the filter is amplified by the amplifier 15. That is, in the forward rotation of the DC motor 5, only the non-inverted amplification of the specific pulse signal (a) generated by the rotation of the DC motor 5, while the reverse rotation of the DC motor 5, the high frequency component ( Only b ') is inverted amplified.

The specific pulse signal a or the high frequency component b 'non-inverted and amplified by the amplifier 15 is input to the waveform shaping circuit 17 via the limiter 16. The limiter 16 removes components equal to or greater than a predetermined value such as a specific pulse signal that is excessively amplified by the amplifier 15. Therefore, it is possible to prevent the pulse signal exceeding the input specification from being input to each device included in the waveform shaping circuit 17 or the MPU 6.

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a square wave and outputs it to the MPU 6 as a digital signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input to the MPU 6 and counted. The MPU 6 has a predetermined pulse signal per rotation of the motor, the relationship between the rotation speed of the DC motor 5 and the mirror tilt angle, the mirror angle in normal operation, the mirror angle in reverse operation, and the inertia of the DC motor 5. The tilt angle of the mirror is calculated from the coefficient for correcting the rotation and the number of pulse signals input from the motor rotation angle detection circuit 10.

The MPU 6 controls the motor driver 11 to stop the mirror main body 4 accurately at the mirror angle at the time of reversing or at the mirror angle at the time of normal operation based on the calculation result.

According to the first embodiment, in order to amplify a pulse signal having a different polarity in the forward rotation and the reverse rotation of the DC motor 5, the rotation angle detection circuit required by two systems can be reduced to one system. .

14 is a block diagram showing a configuration of another embodiment. The resistor 12 is connected to the negative side of the motor driver 11. The rotation angle detection circuit 10 detects a voltage change of the drive circuit 19 between the DC motor 5 and the resistor 12. In the second embodiment using this, the detected waveform signal includes a pulse signal as shown in Figs. 15A and 15B.

15A is a waveform signal obtained at the forward rotation of the DC motor 5, and FIG. 15B is a waveform signal obtained at the reverse rotation of the DC motor 5. The waveform signal at the forward rotation and the waveform signal at the reverse rotation show a waveform shape that is almost vertically symmetrical in that the voltage polarity of the DC motor 5 is reversed in the positive and negative.

15A and 15B, a and a 'are specific pulse signals generated by the rotation of the DC motor 5, b and b' are high frequency components occurring immediately after this specific pulse signal, and c and c 'are It is a pulse signal generated by ringing phenomenon of high frequency components.

The motor rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signal using the low pass filter 13 and the DC cutter 14.

The filter 13 and the DC cutter 14 extract only the high frequency component b at the forward rotation of the DC motor 5, and the specific pulse signal a 'at the reverse rotation of the DC motor 5. Pass) is set up so that only) can be extracted. Each pulse signal extracted in this way has the same polarity. Therefore, it can be amplified by one amplifier.

Since the inverting amplifier is used as the amplifier 15, in the forward rotation of the DC motor 5, the high frequency component b shown in Fig. 15A is inverted and amplified as shown in Fig. 15C. In the reverse rotation of the DC motor 5, the specific pulse signal a 'generated by the rotation of the DC motor 5 shown in Fig. 15B is inverted and amplified as shown in Fig. 15D.

The high frequency component b or the specific pulse signal a 'inverted and amplified by the amplifier 15 is input to the waveform shaping circuit 17 via the limiter 16.

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a square wave and outputs it to the MPU 6 as a digital signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input to the MPU 6 and counted. The MPU 6 has a preset pulse signal per rotation of the motor, the relationship between the rotational speed of the DC motor 5 and the mirror tilt angle, the mirror angle in normal operation, the mirror angle in reverse operation, and the inertia of the DC motor 5. The tilt angle of the mirror is calculated from the coefficient for correcting the rotation and the number of pulse signals input from the motor rotation angle detection circuit 10.

The MPU 6 controls the motor driver 11 to stop the mirror main body 4 accurately at the mirror angle at the time of reversing or at the mirror angle at the time of normal operation based on the calculation result.

Also in the second embodiment, in order to amplify a pulse signal having a different polarity in the forward rotation and the reverse rotation of the DC motor 5, the rotation angle detection circuit required by two systems can be reduced to one system. .

Due to the characteristics of the DC motor 5 to be used, the position at which the waveform signal is to be detected, and the like, this waveform signal may include the pulse signal shown in Figs. 16A and 16B as in the third embodiment.

FIG. 16A is a waveform signal obtained at the forward rotation of the DC motor 5, and FIG. 16B is a waveform signal obtained at the reverse rotation of the DC motor 5.

16A and 16B, a and a 'are specific pulse signals generated by the rotation of the DC motor 5, b and b' are high frequency components generated immediately after this specific pulse signal, and c and c 'are Pulse signal generated by ringing phenomenon of high frequency components.

The rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signal by using the low pass filter 13 and the DC cutter 14.

The filter 13 and the DC cutter 14 extract only the high frequency component b at the forward rotation of the DC motor 5, and the specific pulse signal a 'at the reverse rotation of the DC motor 5. Pass) is set up so that only) can be extracted.

Since the non-inverting amplifier is used as the amplifier 15, during the forward rotation of the DC motor 5, the high frequency component b shown in Fig. 16A is non-inverted and amplified. In the reverse rotation of the DC motor 5, the specific pulse signal a 'generated by the rotation of the DC motor 5 shown in Fig. 16B is non-inverted and amplified.

The amplified high frequency component b or the specific pulse signal b 'is input to the waveform shaping circuit 17 via the limiter 16.

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a square wave and outputs it to the MPU 6 as a digital pulse signal.

The digital pulse signal output from the rotation angle detection circuit 10 is input to the MPU 6 and counted. The MPU 6 controls the tilt angle of the mirror body 4 based on the input digital pulse signal.

Also in the third embodiment, in order to amplify a pulse signal having a different polarity in the forward rotation and the reverse rotation of the DC motor 5, the rotation angle detection circuit required by two systems can be reduced to one system. .

In addition, the waveform signal may include the pulse signal shown in Figs. 17A to 17D as in the fourth embodiment in relation to the characteristics of the DC motor 5 to be used and the position to detect the waveform signal.

17A is a waveform signal obtained at the time of forward rotation of the DC motor 5, and FIG. 17B is a waveform signal at the time of reverse rotation of the DC motor 5.

17A and 17B, a and a 'are specific pulse signals generated by the rotation of the DC motor 5, b and b' are high frequency components occurring immediately after this specific pulse signal, and c and c 'are It is a pulse signal generated by ringing phenomenon of high frequency components.

The motor rotation angle detection circuit 10 extracts these pulse signals from the detected waveform signal using the low pass filter 13 and the DC cutter 14.

The filter 13 and the DC cutter 14 extract only the specific pulse signal a when the DC motor 5 rotates forward, and the high frequency component b 'when the DC motor 5 rotates reversely. Pass) is set up so that only) can be extracted. Each pulse signal extracted in this way has the same polarity. Therefore, it can be amplified by one amplifier.

Since the inverting amplifier is used as the amplifier 15, during the forward rotation of the DC motor 5, the specific pulse signal shown in Fig. 17A is inverted and amplified as shown in Fig. 17C. In the reverse rotation of the DC motor 5, the high frequency component b 'generated by the rotation of the DC motor 5 shown in Fig. 17B is inverted and amplified as shown in Fig. 17D.

The amplified pulse signal is input to the waveform shaping circuit 17 via the limiter 16.

The waveform shaping circuit 17 shapes the amplified pulse signal, which is an analog signal, into a square wave and outputs it to the MPU 6 as a digital pulse signal. The MPU 6 controls the tilt angle of the mirror body 4 based on the input digital pulse signal.

Next, the driver explains how to operate the control device.

When the motor vehicle driver selects the reverse gear of the transmission as the shift lever or the like to reverse the vehicle, the downhill start signal is automatically input to the MPU 6 from the gear select position switch 9.

The MPU 6 receives the downward tilt start signal from the gear selection position switch 9 and outputs a control signal corresponding to this signal to the motor driver 11. The motor driver 11 receiving the control signal from the MPU 6 applies a predetermined DC voltage to the terminals of the DC motor 5 of both the left and right side mirrors 1, respectively. The DC motor 5 receiving the voltage starts forward rotation to drive the actuator assembly 3 and to tilt the mirror body 4 downward.

As described above, when the mirror main body 4 starts the down tilt, the control device controls the tilt angle of the mirror main body 4 as described above.

After the mirror body 4 stops at the mirror angle at the time of reversing, the driver reverses the vehicle while checking the rear lower side with this mirror. When reverse is completed, the driver operates the shift lever to select a gear other than the reverse gear. In this way, when another gear is selected from the reverse gear, the rising tilt start signal is automatically input to the MPU 6 from the gear selection position switch 9.

The MPU 6 receives the rising tilt start signal from the gear selection position switch 9, and outputs a control signal corresponding to this signal to the motor driver 11. The motor driver 11 receiving the control signal from the MPU 6 applies a predetermined DC voltage to the terminals of the DC motor 5 of both the left and right side mirrors 1 in the negative and negative directions as it descends. The DC motor 5 applied with the voltage starts reverse rotation to drive the actuator assembly 3 and to tilt the mirror body 4 upward.

When the mirror main body 4 starts the ascending tilt in this manner, the control device controls the tilt angle of the mirror main body 4 as described above.

(7th Embodiment)

The control apparatus of the motor vehicle remote control type side mirror of the seventh embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror downward from the initial position, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

18 and 2 show a control device for a motor vehicle remote control type side mirror according to the seventh embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a so-called side mirror (door mirror) provided at the lower right front pillar of the vehicle. The side mirror 1 has a casing 2 shaped like a clam shell, and the actuator assembly 3 is accommodated in the casing 2, and at the rear of the vehicle of the casing 2 almost over the entire surface. A mirror body 4 made of a flat mirror is disposed, and the mirror body 4 is mounted to the actuator assembly 3 via the base plate 25. And the angle of the up-down direction of the mirror main body 4 is adjusted by the reduction gear unit which is not shown by operation of the DC motor 5 (DC motor: only shown in FIG. 18) built in the actuator assembly 3, respectively. It is composed. That is, the mirror main body 4 and the base plate 25 correspond to the movable part of the side mirror 1. The DC motor which adjusts the horizontal angle of the mirror main body 4 is also attached to the actuator assembly 3 similarly.

The DC motor 5 is connected to a controller (control device) by an electric wiring device. The controller is connected to a battery which is a power source of the vehicle body and at the same time, at least a remote control operation switch 8 which is manually operated by a driver of a vehicle, and a gear selection position switch 9 which is linked to the operation of a gear switching lever (not shown). The output signal from the gear selection state detecting means is input, and according to the signals input from the switches 8 and 9 to the controller, the power supply to the DC motor 5 is adjusted, and the side mirror 1 Adjust the tilt angle of the mirror body (4). The switches 8 and 9 may be referred to as external signal detecting means. The controller is the remainder except for the DC motor 5, the remote control operation switch 8 and the gear selection position switch 9 in FIG.

More specifically, the controller receives an output signal from the remote control operation switch 8 or the gear selection position switch 9 and outputs a control signal corresponding to this signal to the driver circuit 11. (micro processing unit) 12 is disposed, and is present on the DC motor 5 (the left and right sides of the vehicle body, respectively) by the driver circuit 11 receiving the control signal from the MPU 12, but only one side is shown in FIG. DC voltage is applied to each of the terminals so that the DC motor 5 is rotated. In this configuration, the car driver operates the remote control operation switch 8 so that the tilt angle of the mirror body 4 in the vertical direction can be obtained so as to obtain a suitable rear clock in a substantially horizontal direction while sitting in the driver's seat during normal forward driving. Can be easily adjusted. The position of the mirror main body 4 from which the suitable rear view of a substantially horizontal direction is obtained in the state which sat in this driver's seat is an initial position. And automatic adjustment of the up-down inclination-angle of the mirror main body 4 corresponding to gear switching mentioned later can also be performed. Here, the driver circuit 11 corresponds to a power regulation circuit used to regulate the supply power to the DC motor 5, and further includes control means for the MPU 12 to control the driver circuit 11. do. In addition, the illustration of the memory and I / O interface in the controller is omitted.

The controller is a motor rotation angle detection circuit 13 for detecting the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5. (Rotation angle detecting means). The motor rotation angle detection circuit 13 focuses on the change in the supply current i due to the change of the internal impedance caused by the rotational operation of the DC motor 5, and the DC motor is changed from the fluctuation state of the current i. The rotation angle of (5) is detected.

Specifically, two power wirings 35a and 35b connecting the DC motor 5 and the driver circuit 11 and the DC current i flowing from the driver circuit 11 to the DC motor 5 Resistor 14a, 14b for detecting as an electrical signal, a selector 32 for selecting one of the currents flowing through the resistors 14a, 14b, and a low pass filter for removing high frequency components of the current waveform. An amplifier circuit 16 composed of an amplifier 21 configured to remove a direct current component from an output from the filter circuit 15 and an amplifier configured to amplify a signal from which the direct current component has been removed. ), A limiter 22, and a waveform shaping circuit 17 for shaping the output waveform from the amplifying circuit 16 into a square wave.

In this case, the mirror main body 4 is tilted up or down by forward or reverse rotation using only one DC motor 5. In the forward and reverse rotation of the DC motor 5, the driver circuit 11 is rotated. The driving current sign of is reversed. Thus, the resistors 14a and 14b are connected in series to each of the two power wirings 35a and 35b, and the selector 32 selects a signal from either resistor 14a or 14b and transmits it to a subsequent circuit. do. This ensures that the transmitted signal is always in phase. The selector is controlled by the MPU 12 to select a signal.

As a comparison mode, only one resistor 14 is connected in series to one power wiring in Fig. 28, and both controllers in both normal and reverse rotations acquire a current flowing through this resistor 14 as a signal. In the comparative controller, since the phase of the signal is reversed in the forward and reverse rotations, two capacitors 21a and 21b, amplification circuits 16a and 16b, and two limiters 22a and 22b are arranged, respectively. An A / S (analog switch) 23 for selecting and transmitting one signal is disposed in the shaping circuit 17. In the forward rotation and the reverse rotation, signal detection is performed between the filter circuit 15 and the A / S 23 in separate circuits. This comparative form has two more parts scores than the seventh embodiment, and is disadvantageous in terms of the installation area of the circuit in terms of cost. In the comparison mode, since the types of the DC motors 5 are different depending on the type of the vehicle in which the controller is installed, two constants are set for each of the capacitors 21a and 21b, the amplifier circuits 16a and 16b, and the limiters 22a and 22b. Although it is necessary and cumbersome to set, in the seventh embodiment, since there is only one capacitor 21, an amplifier circuit 16, and one limiter 22, constant setting is simple and the setting time can be shortened.

To describe the controller in more detail, the DC motor 5 used in the side mirror 1 of the seventh embodiment is, for example, a three-slot motor as shown in FIG. A rotor 53 having three electric magnets 52, 52, and 52 is mounted on the rotating shaft 51 of the motor 5 with an insulating part interposed therebetween, and a stator 54 made of a permanent magnet is disposed outward from the rotor 53. . On the coaxial with the rotor 53, a commutator 55 for supplying current to the coils of the electric magnets 52 is disposed integrally with the rotor, and the brush is disposed so as to contact the outside of the commutator 55. 56, 56) are excreted.

When the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the direction of the current supplied from the brushes 56 and 56 to each electric magnet 52 through the commutator 55 is changed. By switching, the polarity of each of the electric magnets 52 is gradually reversed, so that the rotor 53 reacts to the magnetic field of the stator 54 irrespective of its rotational position, so that it rotates in a constant direction (counterclockwise in the example of the drawing). Rotate On the other hand, when the direction of the current i to the brushes 56 and 56 is reversed, the rotor 53 rotates in the direction opposite to the predetermined direction.

Moreover, as the contacting position of the commutator 55 and the brushes 56 and 56 changes as shown typically to FIGS. 4A-4E by such a rotation operation of the DC motor 5, it respond | corresponds to the contact position. The induced electromotive force of each electric magnet 52 coil changes so that the motor current i, i.e., the supply current i from the driver circuit 11 to the DC motor 5 is changed to the DC motor. In order to correspond to the rotation angle of (5), it fluctuates by a fixed period. This is an electrical signal in the state of changing the power supply amount according to the rotation operation of the DC motor 5. Fig. 5A shows the state of change of the current i detected in the controller based on the voltage drop across the resistors 14a and 14b. When the waveform of this current i is filtered through the filter circuit 15, The signal waveform i 'as shown in Fig. 5B is obtained.

Subsequently, as shown in Fig. 5C, the signal is amplified by the amplifying circuit 16, and this amplified signal i " is shaped into a square wave by the waveform shaping circuit 17, and the MPU (P) as a pulse signal p (p). 12) The number of input pulse signals is counted by the counter of the MPU 12, and the rotation angle of the DC motor 5, that is, the tilt angle of the mirror main body 4, is detected based on this count value. In the seventh embodiment, as shown in Figs. 5A to 5D, the pulse signal p is inputted once each time the rotation angle of the DC motor 5 changes by 60 degrees. Thus, the mirror main body 4 and the DC If the gear ratio of the reduction gear device which drives and connects the motor 5 is set to correspond to, for example, that the mirror angle changes by 10 degrees when the DC motor 5 rotates 20, the pulse signal p is 120 times. When counted, the inclination angle of the mirror body 4 is changed by 10 degrees. As shown in Fig. 5D, even if a noise component is included in the motor current i, the rotation angle of the DC motor 5 is accurately detected because there is no error in the number of pulse signals p after waveform shaping.

Therefore, as will be described later, the tilting angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the controller 6 based on the count value of the pulse signal p. Below, a series of control which the side mirror 1 movable part which the control means of 7th Embodiment performs is tilted downward from an initial position, then tilts upward and returns to an original initial position is demonstrated.

A series of control starts is operation which makes a transmission gear reverse. When the MPU 12 receives the selection state detection signal for the reverse gear from the gear selection position switch 9, a command is issued from the MPU 12 and power supply described below is executed.

First, the MPU 12 supplies the electric power to the DC motor 5 for a predetermined time, for example, 2 seconds so as to tilt the tilt angle of the mirror body 4 downward by changing it from the initial position by a predetermined amount. Command), the driver circuit 11 stops the supply after supplying power according to the command. The predetermined tilt angle from the initial position is an angle at which the safety confirmation of the rear side at the rear of the vehicle can be confirmed, specifically, about 5 to 10 degrees. In this way, downward tilting is finished. The number of pulse signals according to the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 during this downward power supply corresponds to the downward tilt rotation angle, and is stored by the MPU 12 as a control means. . At this time, the number of pulse signals due to the inertia rotation of the DC motor 5 after the end of power supply is included in the downhill rotation angle.

After that, when the MPU 12 receives the selection state detection signal from the reverse gear to the other gear from the gear selection position switch 9, the control means stores the DC motor as many times as the number of rotation pulse signals during the downward power supply. 5) transmits a control signal to the driver circuit 11 to return to the initial position by rotating upward, the driver circuit 11 supplies power to the DC motor 5 to tilt upward by a downward tilt rotation angle. The upward tilting ends. The number of pulse signals resulting from the rotation (including inertia rotation) of the DC motor 5 detected by the upward tilt attempt motor rotation angle detection circuit 13 is stored in the MPU 12 as the upward tilt angle, and the next down tilt control is performed. Used for When the downward and upward tilting ends, the mirror body 4 returns to the initial position.

The above is a series of control which starts tilting of the mirror main body 4 by selection of a gear.

The control method and control apparatus for the vehicle side mirror 1 of the seventh embodiment acquire signals from different power wirings 35a and 35b when the DC motor 5 is in the forward rotation and in the reverse rotation. As a result, the phases of the signals are always the same so that the components of the motor rotation angle detection circuit 13 are at least reduced. Therefore, the cost can be reduced, and the volume of the motor rotation angle detection circuit 13 can be reduced, thereby making it possible to miniaturize. In addition, the circuit constant setting of the motor rotation angle detection circuit 13 can be facilitated.

In addition, the electrical detection signal of the DC motor 5 rotation may use a voltage. The time point at which the DC motor 5 of the seventh embodiment starts to be driven is not limited to the time when a signal is input from the gear selection position switch 9, and the time point at which the signal from the remote control operation switch 8 is inputted. It may be an input point of another signal. The configuration of the controller is not limited to that shown in FIG. 18, for example, the limiter 22 may be omitted, or another component may be added. It may also be applied to the control of power windows or other automotive electronics. The control method for supplying power to the DC motor 5 is also not limited to the method of the seventh embodiment. For example, the control may be performed while measuring the tilt angle of the mirror body 4 with a sensor. The selector 32 may use a relay element or other circuits. In addition, the connection part of the wiring which takes out a signal from the power wiring 35a, 35b may be between the resistor 14a, 14b and the driver circuit 11. As shown in FIG.

(8th Embodiment)

The control device of the motor vehicle remote control type side mirror of the eighth embodiment has the same configuration as that of the first embodiment, and tilts the movable part of the side mirror downward from the initial position, and then tilts it upward to almost the original initial position. It is to perform a series of control to return, and it is comprised also as demonstrated below. Here, the same elements as in the first embodiment will be described with reference to the same drawings.

Fig. 19 and Fig. 2 show a control device of the motor vehicle remote control type side mirror of the eighth embodiment of the present invention. In Fig. 2, reference numeral 1 denotes a so-called side mirror (door mirror) provided at the lower right front pillar of the vehicle. The side mirror 1 is installed at the bottom of the front pillar of the vehicle, and has a casing 2 shaped like a clam shell, in which the actuator assembly 3 is accommodated, and the casing 2 is provided. At the rear of the vehicle, a mirror body 4, which is formed of a flat mirror almost over the entire surface, is disposed, and the mirror body 4 is mounted to the actuator assembly 3 via the base plate 25. The mirror tilt angles of the mirror body 4 in the vertical direction are respectively driven by a DC motor 5 (direct current motor: shown in FIG. 19 only) built into the actuator assembly 3, and through a reduction gear device (not shown). Configured to be adjusted.

As shown in FIG. 19, the DC motor 5 is connected to the side mirror control apparatus 6 with an electrical wiring apparatus. The side mirror control device 6 is connected to a battery (not shown), which is a power source, and at the same time, interlocked with at least a remote control operation switch 8 manually operated by a driver of an automobile and a gear switching lever (not shown). The output signal from the gear selection position switch 9 (gear selection state detecting means) is input, and according to the signals input from the switches 8 and 9 to the controller, the supply power to the DC motor 5 is adjusted. The mirror tilt angle of the side mirror 1 and the mirror main body 4 is adjusted. The side mirror control device 6 is the remaining portion except for the DC motor 5, the remote control operation switch 8 and the gear selection position switch 9 in FIG.

More specifically, the side mirror control device 6 receives the output signal from the remote control operation switch 8 or the gear selection position switch 9, and transmits a control signal corresponding to this signal to the driver circuit 11. An MPU (micro-processing unit) 12 for outputting is provided, and is provided by the driver circuit 11 which receives the control signal from the MPU 12, respectively. In this example, only one side is applied to each of the DC voltages, so that the DC motor 5 is configured to rotate. In this configuration, the car driver operates the remote control operation switch 8 so that the tilt angle of the mirror body 4 in the vertical direction can be obtained so as to obtain a suitable rear clock in a substantially horizontal direction while sitting in the driver's seat during normal forward driving. Can be easily adjusted. The position of the mirror main body 4 from which the suitable rear view of a substantially horizontal direction is obtained in the state which sat in this driver's seat is an initial position. And automatic adjustment of the up-down inclination-angle of the mirror main body 4 corresponding to gear switching mentioned later can also be performed. Here, illustration of a memory, an I / O interface, and the like in the controller is omitted.

The side mirror control apparatus 6 detects the motor rotation angle which detects the rotation angle of the DC motor 5 based on the change state of the current i supplied from the driver circuit 11 to the DC motor 5. And a circuit 13 (motor rotation angle detection device). The motor rotation angle detection circuit 13 focuses on the change in the supply current i due to the change of the internal impedance caused by the rotational operation of the DC motor 5, and the DC motor is changed from the fluctuation state of the current i. The rotation angle of (5) is detected. Specifically, a resistor 14 for detecting a DC current i flowing from the driver circuit 11 to the DC motor 5, and this resistor 14 A filter circuit 15 of a low pass filter for removing high frequency components of a flowing current waveform, condensers 21a and 21b for removing direct current components from the output from the filter circuit 15, Output signals from amplifying circuits 16a, 16b, limiters 22a, 22b, analog switches (A / S) 23, and amplifying circuits 16a, 16b, which are composed of amplifiers and the like for amplifying signals. Is provided with a waveform shaping circuit 17 for shaping a square wave pulse signal having a predetermined pulse width. Of these, the resistor 14 to the amplifier circuits 16a and 16b constitute the signal generator 30, and the waveform shaping circuit 17 constitutes the signal output unit. Here, the mirror main body 4 is tilted up or down by rotating one DC motor 5 forward or reverse. In the forward and reverse rotation of the DC motor 5, the drive current from the driver circuit 11 is reversed. The sign is reversed. Therefore, the capacitors 21a and 21b, the amplifier circuits 16a and 16b and the limiters 22a and 22b are arranged in series according to their respective codes, and only one signal is selected by the A / S 23 to form a waveform shaping circuit ( 17).

To describe the side mirror control device 6 in more detail, the DC motor 5 used in the side mirror 1 of the eighth embodiment is, for example, a three-slot motor as shown in FIG. As is well known, a rotor 53 having three electric magnets 52, 52, and 52 is mounted to the rotating shaft 51 of the DC motor 5 with an insulating part interposed therebetween, and a stator made of a permanent magnet outside thereof. 54) is excreted. On the coaxial with the rotor 53, a commutator 55 for supplying current to the coils of the electric magnets 52 is disposed integrally with the rotor, and the brush is disposed so as to contact the outside of the commutator 55. 56, 56) are excreted.

When the rotating shaft 51, the rotor 53, and the commutator 55 rotate integrally, the direction of the current supplied from the brushes 56 and 56 to each electric magnet 52 through the commutator 55 is changed. By switching, the polarity of each of the electric magnets 52 is gradually reversed, so that the rotor 53 reacts to the magnetic field of the stator 54 irrespective of its rotational position, so that it rotates in a constant direction (counterclockwise in the example of the drawing). Rotate On the other hand, when the direction of the current i to the brushes 56 and 56 is reversed, the rotor 53 rotates in the direction opposite to the predetermined direction.

Moreover, as the contacting position of the commutator 55 and the brushes 56 and 56 changes as shown typically to FIGS. 4A-4E by such a rotation operation of the DC motor 5, it respond | corresponds to the contact position. The induced electromotive force of each electric magnet 52 coil changes so that the motor current i, i.e., the supply current i from the driver circuit 11 to the DC motor 5 is changed to the DC motor. In order to correspond to the rotation angle of (5), it fluctuates by a fixed period. Fig. 5A shows the state of change of the current i detected in the controller based on the voltage drop across the resistors 14a and 14b. When the waveform of this current i is filtered through the filter circuit 15, The signal waveform i 'as shown in Fig. 5B is obtained.

Subsequently, as shown in Fig. 5C, the signal is amplified by the amplifying circuit 16, and the amplified signal i " is shaped by the waveform shaping circuit 17 into a square wave pulse signal having a predetermined pulse width, and the MPU. It is inputted by (12).

The number of input pulse signals is counted by the counter of the MPU 12, and the rotation angle of the DC motor 5, that is, the tilt angle of the mirror body 4, is detected based on this count value. In the eighth embodiment, as shown in Figs. 5A to 5D, the pulse signal is input once each time the rotation angle of the DC motor 5 changes by 60 degrees. Therefore, the mirror main body 4 and the DC motor ( 5) If the gear ratio of the reduction gear unit for driving connection is set to correspond to, for example, that the mirror angle changes by 10 degrees when the DC motor 5 rotates 20, the mirror when the pulse signal is counted 120 times The inclination angle of the main body 4 is changed by 10 degrees.

Therefore, as will be described later, the mirror tilt angle of the mirror body 4 can be adjusted by controlling the power supply to the DC motor 5 by the side mirror controller 6 based on the count value of the pulse signal.

In addition, the waveform shaping circuit 17 outputs from the waveform shaping circuit 17 the side of the speed governor whose rotational speed is relatively higher than that of the starter or the transition, which has a relatively low motor rotation speed. The pulse width of the pulse signal is configured to be shortened. Specifically, the pulse width of the pulse signal is changed in two stages on the basis of a specific motor rotational speed, and the pulse width of the starter to the transient pulse signal is set to regulate the pulse coupling of the pulse signal (first pulse signal). The pulse width of the constant speed pulse signal is set to regulate pulse splitting of the pulse signal (second pulse signal).

As the specific motor rotational speed to be the boundary, for example, the motor rotational speed when the pulse width of the first pulse signal becomes a predetermined value close to the pulse period can be selected, in which case the first and The second pulse signal is switched. As the specific motor rotational speed to be used as the boundary, the motor rotational speed may be selected when a pulse signal having a longer pulse width than the first pulse signal is observed by the pulse combination of the first pulse signal. In this case, the coefficient is reduced by one pulse, so it needs to be set to correct it. As the specific motor rotational speed to be the boundary, the time from the starter to the transitional to the constant speed is experimentally measured. For example, if the speed is from the transient to the constant speed after 3 seconds from the start, the motor speed after 3 seconds from the start is determined. You may select it. In this case, however, it is easy to be inaccurate according to the use situation such as temperature or voltage, and thus the reliability is low.

The pulse width switching of such a pulse signal can be performed by setting in the waveform shaping circuit 17 itself or by changing an external resistance constant of the pulse signal generating chip of the waveform shaping circuit 17.

The following describes a series of controls in which the side mirror 1 movable part is tilted downward from the initial position and then tilted upward to almost return to the original initial position.

A series of control starts is operation which makes a transmission gear reverse. When the MPU 12 receives the selection state detection signal of the reverse gear from the gear selection position switch 9, the MPU 12 changes the mirror tilt angle of the mirror body 4 downward by a predetermined amount from the initial position. Command is given to the driver circuit 11 to supply electric power to the motor 5 for a predetermined time, for example, 2 seconds, and the driver circuit 11 stops supplying after supplying electric power as directed. The predetermined amount of tilt angle from the initial position is an angle at which the safety confirmation can be performed behind the vehicle at the time of reversing the vehicle, specifically, about 5 to 10 degrees. Here, the number of pulse signals of the rotation of the DC motor 5 detected by the motor rotation angle detection circuit 13 during this downward power supply corresponds to the downward tilt rotation angle.

After that, when the MPU 12 receives the selection state detection signal from the reverse gear to another gear, the MPU 12 receives the DC motor 5 as many times as the number of rotation pulse signals during the downward power supply. ) Is transmitted to the driver circuit 11 so as to return upward to the initial position, and the driver circuit 11 supplies power to the DC motor 5.

According to the side mirror control apparatus 6 of the above structure, when the motor rotation angle detection circuit 13 is provided, the waveform shaping circuit 17 therein pulses when the motor rotation speed is higher than when the motor rotation speed is relatively low. The pulse width of the signal is configured to be shortened. Therefore, when the motor starting speed of the motor starter or the transition is low, as shown in Fig. 20, the pulse width is short, so that the occurrence of so-called pulse splitting, which is difficult to recognize waveform fragmentation such as ringing generated between signals, is not recognized as a signal in the waveform shaping circuit. do. When the motor rotational speed of the motor transmission is high, as shown in Fig. 21, the pulse width is long, so that generation of so-called pulse coupling, in which a plurality of signals are hardly recognized as one signal in the waveform shaping circuit, is suppressed. Therefore, the mirror inclination angle of the side mirror can be controlled with high precision by corresponding to the rotation angle of the DC motor 5.

In the eighth embodiment, the two-step control of the pulse signal pulse width in the waveform shaping circuit 17 is not particularly limited thereto. The multi-step control may be executed or the control may be performed continuously.

As mentioned above, this invention is suitable for tilt control of the side mirror of a motor vehicle.

Claims (25)

Side mirrors for controlling the operation of the side mirror moving parts by connecting the two DC motors respectively driving the left and right side mirror moving parts of the vehicle to adjust the tilt angle of the mirror body, and adjusting the power supply to the DC motors. Control device, External signal detecting means for detecting an operation signal from the outside; A power control circuit for controlling the power supply to the DC motor; Two rotation angle detection means each configured between the power regulation circuit and the two DC motors, and detecting rotation angles of the DC motors based on a change state of the power supply amount according to the rotation operation of the DC motors; Control means for controlling the supply of power to the DC motor by the power regulation circuit based on the signal from the rotation angle detecting means, The control means executes a series of controls for tilting the movable part of the side mirror downward at an initial position, and then tilting upward to almost return to the original initial position. When a downward tilt start signal is inputted from the external signal detecting means, the power control circuit supplies electric power to both DC motors from the power control circuit so as to tilt the movable parts of both side mirrors downward from an initial position, The sum of the rotation angles of the power supply detected by the two rotation angle detection means at the time of tilting and the rotation angle by the inertia after the power supply stop are stored as the downward tilt rotation angles of the two DC motors, respectively. When an uphill start signal is input after the downhill start signal is input from the external signal detecting means, power is supplied from the power regulation circuit to one of the DC motors, and the downhill rotation angle stored in the control means is provided. Tilt one side mirror movable part upward by almost the same amount to return to the initial position, and during the tilting, the DC motor is set to 1/6 or more and 1/2 or less of the down tilt rotation angle stored in this control means. When tilted upward to the delay angle, the other DC motor is supplied with electric power from the power regulation circuit, and the other side mirror has the same amount as the downhill rotation angle stored in this control means of the other DC motor. Tilt the movable part upwards to return it almost to the initial position, In the upward tilting of both side mirrors, the sum of the upward rotational angle of the power supply of each of the DC motors detected by the two rotational angle detecting means and the upward rotational angle by inertia after the power supply is stopped, the upward tilting rotational angle Each of them is stored as a memory, and the noise detected by the rotational angle detecting means is included in the upward tilting angle after the upward rotation of the inertia stops, and then the control of the series of side mirror moving parts is performed. And the tilting angle of the upward and downward tilt rotations is used to control the tilting upward to return to the initial position almost. The method according to claim 1, The external signal detecting means is a gear selection state detecting means of an automobile transmission, and outputs a downhill start signal when the reverse gear of the transmission is selected, and outputs a start uphill start signal when the reverse gear is changed to another gear. And control the vehicle side mirror. The method according to claim 1, The next series of control of the side mirror movable portion is a tilting upward by supplying electric power in the next control by subtracting the difference between the upward and downward tilt angles of the tilt angle in this control from the downward tilt angle of rotation in the next time control. And a control device for the vehicle side mirror. The method according to claim 1, The control means, when the down tilting is finished or when the up tilting is finished, and at the same time as the power supply to the DC motor is terminated, the power consisting of a current of the opposite sign to the current of the power is supplied to the power regulation circuit. And supplying the direct current motor to the direct current motor for a predetermined first time. The method according to claim 1, The control means is when the downward tilting or the upward tilting has ended, and the power current for a predetermined first time after a predetermined second time has elapsed after the power supply to the DC motor has been stopped. And an electric power consisting of an inversely-signal current is supplied to the direct current motor by the power regulation circuit. The method according to claim 1, The rotation angle detecting means detects the voltage change of the resistor between the DC motor and the motor driver as a waveform signal, which is generated in accordance with the rotation operation of the DC motor, and rotates the DC motor from the detected waveform signal. In addition to extracting and outputting a specific pulse signal generated, The control means is configured to count the specific pulse signal output from the rotation angle detecting means, calculate the tilt angle of the mirror body based on the count value, and control the motor driver based on the calculation result. , The rotation angle detecting means includes a band pass filter for removing high frequency components and low frequency components, which are noise components included in the detected waveform signal, and a waveform shaping circuit for shaping a specific pulse signal output from the band pass filter by a square wave. The control apparatus of the vehicle side mirror provided with. The method according to claim 6, The band pass filter is a control apparatus for an automobile side mirror, comprising a combination of a low pass filter for removing high frequency components of a noise component and a high pass filter for removing low frequency components of a noise component. The method according to claim 7, The band pass filter may include a low pass filter for removing a high frequency component included in the waveform signal, a low frequency component included in the waveform signal during forward rotation of the DC motor, and a low frequency component included in the waveform signal during reverse rotation, respectively. Combination of two types of high pass filter And an analog switch for outputting one of the specific pulse signals output from the two systems of high pass filters to the waveform shaping circuit according to the instruction of the control means. The method according to claim 6, And the band pass filter is composed of an active filter having an amplifier. The method according to claim 1, A power supply for supplying power to the DC motor, And a monitor circuit for monitoring a power supply voltage of said power supply and for issuing a power supply command to said control means to supply power to said direct current motor by said power regulation circuit only when it is greater than a predetermined voltage. Control device. The method according to claim 1, The rotation angle detecting means detects a change in the resistor voltage of the DC motor and the motor driving period generated by the rotation operation of the DC motor as a waveform signal, and extracts and outputs a predetermined pulse signal from the detected waveform signal. In addition to being organized, The control means is configured to count the pulse signal output from the rotation angle detecting means, calculate the tilt angle of the mirror body based on the count value, and control the motor driver based on the calculation result. , The rotation angle detecting means includes a filter for extracting a predetermined pulse signal from the waveform signal, an amplifier for amplifying the pulse signal extracted by the filter, and a waveform shaping circuit for shaping the pulse signal amplified by the amplifier into a square wave. and, The amplifier non-inverts and amplifies a specific pulse signal generated by the rotation of the DC motor during forward rotation of the DC motor, while the amplifier reverses and amplifies the specific pulse signal generated by the rotation of the DC motor during reverse rotation of the DC motor. A control device for an automobile side mirror configured to non-invert amplify high frequency components occurring immediately after. The method according to claim 11, The amplifier inverts and amplifies high frequency components generated immediately after a specific pulse signal generated by the rotation of the DC motor during forward rotation of the DC motor, while rotating the DC motor during reverse rotation of the DC motor. And inverting and amplifying the generated specific pulse signal. The method according to claim 1, Further provided with two power wirings connecting the DC motor and the power control circuit, The rotation angle detecting means is connected to the two power wirings, and is configured to detect the rotation angle of the DC motor based on an electrical signal in a state of change in power supply amount according to the rotation operation of the DC motor. The power control circuit is configured to supply power each of which the currents of the power supplied to the DC motors are made of the reverse code current to each other in the case of adjusting the upward tilt angle and the downward tilt angle of the mirror body. , The rotation angle detecting means acquires a signal from one of the two power wires when adjusting the up-tilting angle of the mirror body, and acquires a signal from the other of these two power wires when adjusting the down-tilting angle. The control device of the vehicle side mirror configured. The method according to claim 1, The rotation angle detecting means includes a signal generator for generating a predetermined signal each time the DC motor rotates by a predetermined angle, and a signal from the signal generator is input to formally convert the signal into a pulse signal having a predetermined pulse width. It has a signal output unit for outputting, And the signal output unit is configured to shorten the pulse width of the pulse signal when the motor rotational speed is higher than when the motor rotational speed is relatively low. The method according to claim 14, And the signal output unit is configured to change the pulse width of the pulse signal in two stages on the basis of a specific motor rotational speed. The method according to claim 14, The pulse signal pulse width when the motor rotational speed is faster than a specific motor rotational speed is set so as to regulate the pulse coupling of the pulse signal. The method according to claim 14, The pulse signal pulse width when the motor rotational speed is lower than a specific motor rotational speed is set so as to regulate the pulse splitting of the pulse signal. It is a control method of the side mirror which performs the operation control of this side mirror movable part by driving two DC motors respectively to the left and right side mirror movable parts of a vehicle so that the inclination angle of a mirror main body may be adjusted, and the power supply to this DC motor is adjusted. , Each of the movable parts of both side mirrors is supplied with electric power to the DC motor to tilt the motor in one direction by a predetermined angle, and the rotation angle of each DC motor power supply and the rotation angle due to inertia after the power supply stop are stored. Making a step, The movable parts of both side mirrors are supplied in the opposite direction by supplying electric power to the respective DC motors by the sum of the rotation angles of the respective electric power supplies in the one direction and the rotation angles by the inertia after the power supply stops, thereby rotating the DC motors. At the time of tilting, the start of power supply to one DC motor is delayed by a predetermined delay time from the start of power supply to the other DC motor, and at the same time, the rotation angle and power supply stop during each DC motor power supply. Storing a rotational angle due to subsequent inertia, The predetermined delay time is a time obtained by adding the delay time to the power supply time to the other DC motor when the movable parts of both side mirrors are tilted in the reverse direction. The control method of the vehicle side mirror of the other DC motor is set to be longer than the time which the inertia rotates by inertia after power supply stop. The method according to claim 18, The DC motor is driven by supplying electric power to the DC motor to tilt the movable part of the side mirror upwards or downwards by a predetermined amount, and then a predetermined amount of electric power is formed from the current of the supplied electric power. The control method of the automobile side mirror which supplies this DC motor for 1st time. The method according to claim 19, The control method of the side mirror of a vehicle which performs supply of the electric power which consists of the said reverse code electric currents when the predetermined 2nd time elapses after power supply to the said DC motor is stopped. The method according to claim 18, A waveform signal detecting step of detecting, as a waveform signal, a voltage change of the DC motor and a motor driving period resistor generated by the rotation operation of the DC motor; A specific pulse signal extracting step of extracting a specific pulse signal generated by the rotation of the DC motor included in the waveform signal detected in the waveform signal detecting step; An inclination angle calculation step of counting a specific pulse signal extracted in the specific pulse signal extracting step and calculating a tilt angle of the mirror body based on the count value; And a supply power control step of controlling the supply power from the motor driver to the DC motor to stop the mirror body at a predetermined angle based on the calculation result in the inclination angle calculation step. In the specific pulse signal extraction step, the high frequency component of the waveform signal detected in the waveform signal detection step is removed with a low pass filter, and the low frequency component is extracted with a high pass filter to extract a specific pulse signal. Control method. The method according to claim 18, Monitoring the power supply voltage of the power supply for supplying power to the DC motor, and when the side mirror movable part is driven in a stopped state, and maintains the side mirror movable part in a stopped state when the power supply voltage is below a predetermined voltage. How to control the mirror. The method according to claim 18, A waveform signal detecting step of detecting, as a waveform signal, a voltage change of the DC motor and a motor driving period resistor generated by the rotation operation of the DC motor; A pulse signal extraction step of extracting, by filtering, a predetermined pulse signal included in the waveform signal detected in the waveform signal detection step; A signal amplifying step of non-inverting or inverting amplifying the pulse signal extracted in the pulse signal extracting step; A waveform shaping step of shaping the pulse signal amplified in the signal amplifying step by shaping the square wave; An inclination angle calculation step of counting a square wave shaped in the waveform shaping step and calculating a tilt angle of the mirror body based on the count value; And a power supply control step of controlling a power supply from the motor driver to the DC motor to stop the mirror body at a predetermined angle based on the calculation result in the inclination angle calculation step. Way. The method according to claim 18, By using the electrical detection signal of the rotation angle of the DC motor, by controlling the power supplied to the DC motor through the power supply wiring, the operation control of the side mirror moving unit is made, Control of the vehicle side mirror, which acquires each detection signal from the different power supply wirings so that the detection signal at the time of adjusting the up-tilting angle of the mirror body is in phase with the detection signal at the time of adjusting the down-tilting angle. Way. The method according to claim 18, A signal generation step of generating a predetermined signal each time the DC motor rotates by a predetermined angle; A signal shaping conversion step of shaping the signal generated in the signal generation step into a pulse signal having a predetermined pulse width; And in the signal shaping conversion step, the pulse signal pulse width when the motor rotational speed is higher than when the motor rotational speed is relatively short is shortened.