JP2003335174A - Device and method for controlling remote-controlled side mirror of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for controlling a remote-controlled side mirror of an automobile for controlling to precisely return the side mirror tilted downward to its original position by excluding a noise induced in a power circuit of one motor when the particular motor is stopped and the other motor is rotating under its own inertia, and by counting only a pulse resulting from the rotation. <P>SOLUTION: The left and right side mirrors are simultaneously tilted downward from an initial position for a definite period of time by the motors. At this time, the sum of the pulse 31 of a motor current by the rotation with power supply and the pulse 33 by the inertial rotation is counted for the left and right respectively. Then, when the mirrors are tilted upward, the left mirror is started to be tilted upward at first and the right mirror is started to be tilted upward after the left mirror is tilted upward by a start delay angle T. Accordingly, as an inertial upward tilting of the right mirror is started after the inertial upward tilting of the left mirror is finished, a false pulse 34 generated in the current of the left motor due to the inertial upward tilting of the right mirror can be identified and excluded not to be counted. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device and a control method for a remote control side mirror of an automobile.

[0002]

2. Description of the Related Art Generally, when moving a vehicle backward,
The driver operates the vehicle while checking the rear with a side mirror called a rearview mirror. At this time, it is dangerous to have obstacles such as curbs or gutters or holes in the vicinity of the rear wheel, so a device for changing the angle of the side mirror by an actuator is provided so that the side mirror can look down. . Since it is complicated to manually change the angle of the side mirror and it is difficult to finely adjust the angle, an automatic angle adjusting device has been developed.

For example, Japanese Patent Laid-Open No. 2000-138812 discloses a control in which a mirror angle is tilted in conjunction with a reverse gear. When the shift lever is put in the reverse gear, the mirror is moved downward. Tilting, and counting the excess tilt due to inertia after the motor stops at this time as the number of pulses generated by the rotation of the motor, and including the excess tilt due to inertia when switching from the reverse gear to another gear. There is disclosed a technique in which the mirror angle is returned to the original position so that the mirror always returns to the same position no matter how many times the mirror angle tilting operation is repeated.

[0004]

However, since the movability of the movable parts of the individual side mirrors and the torque of the individual motors vary, when the left and right side mirrors are tilted simultaneously, one of the side mirrors is tilted. The other motor may be inertially rotating after the power supply to the motor is stopped and the inertial rotation is also stopped.In this case, a pulse is generated even though it is not rotating to the side of the motor that stopped earlier. The phenomenon that only one appears appears (Fig. 6
reference). This will be described in detail.

When electric power is supplied to the motor for a certain period of time so as to descend simultaneously on the left and right sides, and the electric power supply is stopped simultaneously on the left and right sides, the motor rotates a little due to inertia even after the stop, and a pulse 33 due to inertia appears. Since there are variations in the movable parts and motors of the individual side mirrors, the sum of the numbers of pulses 31 and 33 for the power supply rotation and the inertial rotation is different on the left and right. Therefore, even if the left and right sides are simultaneously raised simultaneously, the left and right downward power supply rotation and inertial rotation pulses 31, 33 are respectively generated.
Since the motor is rotated so that it tilts upward only by the sum of the
The end times 36 and 38 of the inertia rotation also differ between the left and right. In FIG. 6, the left motor stops first, but when the left motor coasts 36 when the right motor coasts 33, the left motor is stopped. The pulse 34 appears as if the motor is rotating by inertia. This pulse 34 is a noise signal that is derived from the inertial rotation of the right motor and can be called a false pulse 34, so to speak, but the signal shape is a pulse 33 due to inertial rotation.
Since the false pulse 34 has already appeared at the end of the pulse 33 due to inertial rotation, the pulse 33 due to inertial rotation and the pulse 34 of the noise signal cannot be distinguished as they are.

For this reason, since the so-called false pulse noise is counted and the tilt of the side mirror is restored to its original position, the mirror cannot return to its original position, and when this operation is repeated many times, finally. Will cause the mirror angle to deviate significantly from the initial angle. The phenomenon in which such noise appears can be considered because one of the power lines of the left and right motors is shared, but the current system cannot separate the power lines from each other.

The present invention has been made in view of such circumstances, and an object of the present invention is, when one motor is stopped and the other motor is inertially rotated,
The remote-controlled side mirror for automobiles that controls the return of the side mirror that tilts downward to the original position by counting only the pulses that accompany the rotation without counting the noise that occurs in the power circuit of the former motor. To provide a control device and a control method.

[0008]

In order to achieve the above object, in the solution means of the present invention, a predetermined time difference is provided between the upward tilting start times of the left and right side mirrors, and the inertial rotation of one motor is performed. The noise pulse is generated after the pulse generation is completed, so that the inertial rotation pulse and the noise pulse can be clearly distinguished.

Specifically, in the invention of claim 1, it is connected to two DC electric motors for respectively driving the movable parts of the left and right remote-controlled side mirrors of the vehicle so as to adjust the vertical tilt angle of the mirror body. , A remote-control side mirror control device for controlling the operation of the movable part by adjusting the power supplied to the DC motor.

External signal detecting means for detecting an actuation signal from the outside, a power adjusting circuit for adjusting the power supply to the DC motor, and a power adjusting circuit provided between the power adjusting circuit and both DC motors, respectively. Two rotation angle detecting means for detecting the rotation angle of the DC motor based on the change state of the power supply amount accompanying the rotation operation of the DC motor, and the power adjustment based on a signal from the rotation angle detecting means. And a control means for controlling the power supply to the DC motor by the circuit, wherein the control means tilts the movable part of the side mirror downward from an initial position and then tilts it upward to return to the original initial position. When a downward tilting start signal is input from the external signal detecting means, the movable parts of the both side mirrors are moved downward by a predetermined amount from the initial position. While supplying electric power to both DC motors by the electric power adjustment circuit so as to tilt, the rotation angle during power supply and the rotation angle due to inertia after power supply stop detected by the both rotation angle detecting means at the time of tilting downward. The sum is stored as the downward tilting rotation angle of the both DC motors, and when the upward tilting start signal is input after the downward tilting start signal is input from the external signal detecting means, the sum is stored in one of the DC motors. The electric power is supplied by the electric power adjusting circuit to tilt the movable part of one of the side mirrors upward by substantially the same amount as the stored downward tilting rotation angle of the DC motor and return the movable part to the initial position substantially. When the electric motor tilts upwards up to a start delay angle set at 1/6 or more and 1/2 or less of the downward tilting rotation angle, the other DC The electric power is supplied to the motive power by the electric power adjusting circuit, the movable portion of the other side mirror is tilted upward by the same amount as the stored downward tilting rotation angle of the other DC motor, and is substantially returned to the initial position. When the side mirrors are tilted upward, the sum of the upward rotation angle of each DC motor, which is detected by the rotation angle detection means, during the power supply and the upward rotation angle due to inertia after the power supply is stopped is tilted upward. Each of them is stored as a rotation angle, and the noise signal detected by the rotation angle detecting means after the upward rotation due to the inertia is stopped is excluded from being included in the upward tilting rotation angle, and the next series of sides. In the control of the movable portion of the mirror, the upward and downward tilting rotation angles are used for the control of tilting the mirror upward and returning it to the initial position. And

With the above structure, when the DC motor is rotated by receiving the power supplied from the power adjustment circuit, the amount of power supplied to the DC motor is changed substantially periodically due to the change of the internal impedance caused by the rotation. The rotation angle of the DC motor is detected by the rotation angle detection means based on this change state. The control means first supplies electric power to both direct current machines so that the movable part of the side mirror tilts downward by a predetermined amount, and then the sum signal obtained by adding the inertial rotation angle to the detected downward rotation angle. Is counted (memorized) as each downward tilt rotation angle. Here, the initial position is the position of the side mirror during normal driving (when driving forward) where the driver can visually recognize the vehicle behind, and is the position set when the vehicle is shipped. Further, the predetermined downward tilting from the initial position is the downward tilting of the movable portion of the side mirror by an angle at which the driver can visually recognize the ground contact portion of the rear wheel. The tilt angle of the mirror body in the vertical direction may be adjusted by tilting the entire side mirror, or tilting only the mirror body or the mirror body and its accessory parts.

Next, when the upward tilting start signal is detected,
The control means first supplies electric power to only one of the DC motors to rotate the DC motors upward by an amount corresponding to the downward tilting rotation angle of the DC motors, thereby substantially returning the movable portion of the one side mirror to the initial position. At this time, at the time when this DC electric motor is rotated by the set starting delay angle, the control means supplies electric power to the other DC electric motor to rotate upward by the corresponding downward tilt rotation angle, The movable part of the other side mirror is also returned to the initial position. Here, the set starting delay angle is an angle set within the range of 1/6 or more and 1/2 or less of the downward tilting rotation angle of the former DC motor. By setting the starting delay angle in this way, the former DC motor's upward rotation operation ends, the inertial rotation further ends, and the latter DC motor's upward rotation operation ends. The inertial rotation can be started. Therefore, when the former DC motor is stopped and the latter DC motor is inertially rotating, the noise signal detected by the former rotation angle detecting means is temporally separated from the rotation angle signal by the former inertial rotation. Appears to appear. That is, since there is no signal between the rotation angle signal and the noise signal at all, the noise signal can be distinguished from the rotation angle signal due to inertial rotation, and the noise signal is eliminated by the filter to perform the upward tilt rotation. You can prevent it from being included in the angle.

This upward tilting rotation angle is used for the next control of tilting the movable portion of the side mirror, but the next control can be performed according to the actually tilted angle, and the downward and upward tilting angles can be controlled. After the end of, the deviation from the initial position can be made only by the amount of upward inertial rotation of that time. Here, if the starting delay angle is less than ⅙ of the downward tilt rotation angle, the rotation angle signal and the noise signal due to inertial rotation may not be temporally separated depending on the states of the side mirror and the DC motor. is there. Also, the starting delay angle is the downward tilt rotation angle of 1
If it is larger than / 2, the time difference between the upward tilting start of the movable parts of the left and right side mirrors is too large, and the driver feels uncomfortable.

Next, in the invention of claim 2, in claim 1, the external signal detection means is a gear selection state detection means of the automobile transmission, and the downward tilting start signal is the reverse gear selection state detection signal of the transmission. It is assumed that the upward tilting start signal is a selection state detection signal from the reverse gear to another gear.

With the above structure, 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 means controls the power adjusting circuit. Power is supplied from this power control circuit to the DC motor,
The rotary operation of the DC motor causes the movable portion of the side mirror to tilt downward. After that, when the rotation angle of the DC motor detected by the rotation angle detection means reaches a predetermined angle, the control means stops the power supply to the DC motor. This makes it possible to automatically tilt the side mirror downward by a preset angle when the vehicle is running backwards, so that the driver can easily check the road surface condition near the rear wheel, the gutter, the curb, etc. be able to.

When the vehicle shifts to the forward driving again, the gear selection state detecting means detects a change in the gear selection state from the reverse gear to the other gears,
In response to this, the control means controls the power adjustment circuit, and the movable portion of the side mirror is tilted upward by the rotational operation of the DC motor. After that, when the rotation angle of the DC motor detected by the rotation angle detecting means becomes equal to the downward tilt rotation angle, the control means stops the power supply to the DC motor. That is, when the side mirror is tilted downward by a preset angle in response to the backward driving of the vehicle, the side mirror is tilted upward by the set angle to return to the initial position and automatically stopped. Will be possible. As a result, when the vehicle shifts from backward driving to forward driving,
Since the tilt angle of the mirror body of the side mirror can be automatically returned to the initial position which is a normal angle,
The driver does not need to readjust the angle of the mirror one by one, and good usability can be obtained.

Next, the invention of claim 3 relates to claim 1 or 2.
In, the following series of control of the movable part of the side mirror is
It is assumed that the difference between the upward and downward tilting rotation angles in this control is subtracted from the downward tilting rotation angle in the next control to obtain the rotation angle at which the electric power is supplied in the next control to tilt upward.

With the above-mentioned structure, although the control is simple, after the downward and upward tilting of the side mirror is completed, the deviation from the initial position is always only the amount of the upward inertial rotation. You can

Next, in the invention of claim 4, two DC electric motors drive the movable parts of the left and right remote control type side mirrors of the automobile so as to adjust the tilt angle of the mirror main body, and supply to the DC electric motors. The present invention is directed to a control method for a remote control side mirror that controls the operation of the movable part by adjusting the electric power.

Then, both of the movable parts are tilted in one direction by a predetermined angle by supplying power to the DC motor, and the rotation angle of each DC motor during power supply and after the power supply is stopped. The step of storing the rotation angle by inertia and the moving parts of both of the above,
When tilting in the opposite direction by supplying power to each DC motor by the sum of the rotation angle during each power supply in the one direction and the rotation angle due to inertia after stopping the power supply, and rotating the DC motor In addition, the start of the power supply to one of the DC motors is tilted by a predetermined delay time from the start of the power supply to the other DC motor, and the rotation angle and the power supply of each DC motor are being supplied. A step of storing the rotation angle due to inertia after the stop,
The predetermined delay time, when tilting both movable parts in the opposite direction, the time obtained by adding the delay time to the power supply time to the one DC motor is the time to the other DC motor. It is assumed that the time is set to be longer than the time in which the other DC motor is rotated by inertia after the power supply is stopped.

According to the above method, 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 signal that appears during storage can be distinguished from the true rotation angle signal, and accurate control can be performed. The predetermined delay time is 1/6 or more of the time required for the other DC motor to rotate by the sum of the rotation angle during the power supply in one direction and the rotation angle due to inertia after the power supply is stopped. It is preferable that it is 1/2 or less so that the noise signal and the rotation angle signal can be reliably distinguished.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment in which the control device of the present invention is applied to an electric remote control side mirror of an automobile. In FIG. 2, 1 is a so-called door mirror attached to the lower end of the right front pillar of the automobile. . This door mirror 1 has a casing 2 having a shell-like shape, an actuator assembly 3 is housed in the casing 2, and a mirror made up of a plane mirror over the entire surface of the casing 2 on the vehicle rear side. The main body 4 is arranged, and the mirror main body 4 is used as the base plate 25.
It is attached to the actuator assembly 3 via the. Then, the vertical corners of the mirror body 4 are
The operation is performed by a DC motor 5R (DC motor: only shown in FIG. 1) incorporated in the actuator assembly 3 so as to be adjusted via a reduction gear device (not shown). That is, the mirror body 4 and the base plate 25 correspond to the movable portion of the door mirror 1. A DC motor (not shown) for adjusting the horizontal angle of the mirror body 4
Is similarly attached to the actuator assembly 3.

The DC motor 5R is connected to the controller 6 (control device) by a wire harness. The controller 6 is connected to a battery 7 that is a power source, and at least a remote control operation switch 8 that is manually operated by the driver of the vehicle and a gear selection position switch 9 that is linked to the operation of a gear change lever (not shown). The output signal from the (gear selection state detecting means) is input, and the power supplied to the DC motor 5R is adjusted according to the signals input from the switches 8 and 9 to the controller 6, The tilt angle of the mirror body 4 in the remote control mirror 1 is adjusted. That is, the switches 8 and 9 correspond to the external signal detecting means.

More specifically, the controller 6 is provided with an MPU 12 that 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. Driver circuit 11 receiving control signal from MPU 12
Thus, DC voltages are applied to the terminals of the right and left DC motors 5R and 5L, respectively, and the DC motors 5R and 5L are rotated. With this configuration, the driver of the vehicle operates the remote control operation switch 8 so that the normal rearward traveling view in the substantially horizontal direction can be obtained while sitting in the driver's seat during normal forward driving. The tilt angle in the vertical direction can be easily adjusted. Then, the tilt angle of the mirror body 4 in the vertical direction can be automatically adjusted according to a gear change described later. Here, the driver circuit 11 is used for the DC motor 5
It corresponds to a power adjustment circuit that adjusts the power supplied to the R and 5L, and also corresponds to a control unit that controls the driver circuit 11 by the MPU 12. The memory and I / O interface of the controller 6 are not shown.

Further, as a feature of the present invention, the controller 6 includes the driver circuit 11 to the DC motors 5R and 5R.
Based on the changing state of the currents iR and iL supplied to L,
It has motor rotation angle detection circuits 13R and 13L (rotation angle detection means) for detecting the rotation angles of the DC motors 5R and 5L. This motor rotation angle detection circuit 13R, 13
L is the supply current iR of each DC motor 5R,
Focusing on the fact that iL fluctuates, the rotation angle of the DC motors 5R and 5L is detected from the fluctuation state of the currents iR and iL.
Resistors 14R and 14L for detecting the direct currents iR and iL flowing to the motors 5R and 5L, and the resistors 14R and 14L,
Filter circuits 15R and 15L that are low-pass filters that remove high-frequency components of the current waveform that flows through 14L, amplifier circuits 16R and 16L that are operational amplifiers that amplify the outputs from the filter circuits 15R and 15L, and amplifier circuits 16R and Waveform shaping circuits 17R and 17L for shaping the output waveform from 16L into a rectangular wave.

In the above description, the DC motor 5
R, 5L, motor rotation angle detection circuits 13R, 13L, resistors 14R, 14L, filter circuits 15R, 15L, amplification circuits 16R, 16L, waveform shaping circuits 17R, 17L, and supply currents iR, iL include a right side mirror. 1 corresponds to R, and left side mirror 1 corresponds to L, but hereinafter, in the description common to the left and right, reference numerals omitting R and L are used.

Explaining the controller 6 in more detail, the DC motor 5 used in the remote control type door mirror 1 of this embodiment has, for example, three slots as shown in FIG. A rotor 53 having three electromagnets 52, 52, 52 is attached to a rotating shaft 51 of the motor 5 via an insulating portion, and a stator 54 made of a permanent magnet is arranged outside the rotor 53. Further, a commutator 55 for supplying electric power to the coils of each electromagnet 52 is provided integrally with the rotor 53 coaxially with the rotor 53, and brushes 56, 56 are provided so as to contact the outside of the commutator 55. ing.

Then, the rotating shaft 51 and the rotor 5
3 and the commutator 55 rotate as a unit, the brushes 56, 56 move the electromagnets 5 through the commutator 55.
The direction of the current supplied to 2 is switched, and the polarities of the electromagnets 52 are sequentially reversed, so that the rotor 53
Regardless of its rotational position, repels the field of the stator 54 and rotates in one direction (counterclockwise direction in the example). On the other hand, if the direction of the current i to the brushes 56, 56 is reversed, the rotor 53 rotates in the direction opposite to the one direction.

As the DC motor 5 rotates, the contact position between the commutator 55 and the brushes 56, 56 changes as schematically shown in FIGS. 4 (a) to 4 (e). The induced electromotive force of the coil of each electromagnet 52 changes so as to correspond to the position, and as shown in FIG. 5A, the motor current i, that is, the supply current i from the controller 6 to the DC motor 5 is changed to the DC motor 5 Changes in a substantially constant cycle so as to correspond to the rotation angle of. FIG. 5A shows a change state of the current i detected based on the voltage drop across the resistor 14 in the controller 6, and the waveform of this current i passes through the filter circuit 15 and is smoothed. Then, a signal waveform i'as shown in FIG.

Then, the signal is amplified by the amplifier circuit 16 as shown in FIG.
Is shaped into a rectangular wave by the waveform shaping circuit 17, and is input to the MPU 12 as a pulse signal p. And MPU
The number of input pulses is counted by the counter 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 this embodiment, as shown in FIG. 5, the pulse signal p is input once every time the rotation angle of the DC motor 5 changes by 60 °, so that the mirror body 4 and the DC motor 5 are driven. The gear ratio of the reduction gear device to be connected is, for example, 2 for the DC motor 5.
If the mirror angle is set to change by 10 ° when it is rotated 0 times, it means that the tilt angle of the mirror body 4 changes by 10 ° when the pulse signal p is counted 120 times. Become. Even if the motor current i contains a noise component as shown in FIG.
As shown in (d), since the pulse number p after waveform shaping has no error, the rotation angle of the DC motor 5 can be 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. However, since the DC motor 5 rotates by inertia even after the power supply is stopped, the tilt angle for this inertia rotation cannot be adjusted. Further, even after the DC motor 5 is stopped, a noise signal which is a so-called false pulse having exactly the same shape as the motor 5 is rotating may be counted. Below, a series of controls in which the movable portion of the door mirror 1 of the present embodiment is tilted downward from the initial position, and then tilted upward to substantially return to the original initial position, and the generation of the noise signal during this control. The removal will be described.

FIG. 7 is a timing chart of pulses supplied and generated to the right and left DC motors 5R and 5L. When the MPU 12 receives a reverse gear selection state detection signal from the gear selection position switch 9, the MPU 12 supplies electric power to the DC motors 5R and 5L for a certain period of time so that the tilt angles of the right and left mirror bodies 4 are simultaneously downward. Command the driver circuit 11 to supply for 2 seconds,
The driver circuit 11 supplies electric power as such. Even if the power supply is stopped simultaneously on the left and right, the DC motors 5R and 5L rotate slightly due to inertia even after the stop, so the pulse 33 due to inertial rotation is detected by the rotation angle detection circuits 13R and 13L. Moving part of each side mirror 1 and DC motor 5
Since R and 5L have variations in easiness of rotation, torque, etc., pulse 3 of rotation during power supply and inertial rotation
The sum of the numbers 1, 33 is different on the left and right. The sum of the number of rotation pulses 31 during the downward power supply and the number of inertial rotation pulses 33 corresponds to the downward tilt rotation angle.

Next, the MPU 12 sends a selection state detection signal from the reverse gear to another gear from the gear selection position switch 9.
Then, the MPU 12 first applies only the left DC motor 5L to the rotation pulse 31 of the left downward power supply.
Driver circuit 11 so that it is rotated upward by an amount corresponding to the sum of the number of pulses and the number of inertial rotation pulses 33, and is substantially returned to the initial position.
To the DC motor 5L. The driver circuit 11 supplies electric power 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 send the right DC motor 5L.
The electric power is supplied to R, and is rotated upward by an amount corresponding to the sum of the number of rotation pulses 31 and the number of inertial rotation pulses 33 during the downward power supply on the right side so as to approximately return to the initial position. . The time required to tilt by the start delay angle T at this time is a predetermined delay time. Further, this starting delay angle T is equal to the pulse 3 of the rotation during the downward power supply on the left side.
The angle is set in the range of 1/6 or more and 1/2 or less of the angle converted from the sum of the number of 1 and the number of pulses 33 of inertia rotation, and here, for example, is set to the angle of 1/4. ing. The tilting up to the start delay angle T is determined by the MPU 12 by counting the upward rotation pulse 32 by the power supply.

As described above, since the right DC motor 5R starts to rotate upward with a delay from 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. Further, after the inertial rotation ends 36, the rotation by the power supply of the right DC motor 5R ends 37 and the inertial rotation starts. Along with the inertial rotation of the right DC motor 5R, a false pulse (noise signal) 34 is supplied to the rotation angle detection means 13L connected to the left DC motor 5L.
Is detected. Here, since there is a state in which no pulse signal exists between the inertial rotation pulse 33 and the false pulse 34 detected by the left rotation angle detection means 13L,
The MPU 12 can discriminate between pulses 33 of spurious rotation and spurious pulses 34, and thus can be filtered out so that spurious pulses 34 are not counted. The filter function is incorporated in the MPU 12. As a result, the MPU 12 can store only the sum of the rotation angle during the upward power supply and the inertia rotation angle as the upward tilt rotation angle, and the false pulse 34 can be excluded so as not to be included.

In other words, the above control is DC on the right side.
The delay time is set so that the time obtained by adding the delay time to the power supply time to the motor 5R is longer than the time obtained by adding the time of inertia rotation to the power supply time to the left DC motor 5L. Therefore, after the inertial rotation of the left DC motor 5L ends 36, the rotation of the right DC motor 5R due to the power supply ends 37 and the inertial rotation starts.

When the above-mentioned series of operation control is completed, the tilt angles of the left and right mirror bodies 4, 4 are further tilted upward by the amount of inertial rotation from the initial position. Therefore, in the next operation control, the inertial rotation amount is also taken into consideration and the upward control is performed to return the position to a position as close as possible to the initial position. In addition, since the upward rotation angle by each of the left and right power supplies is equal to the downward tilt rotation angle, the upward inertia rotation amount is a difference between the upward and downward tilt rotation angles. The specific next series of control that takes into consideration the inertial rotation is
When the next and subsequent times are set as a series of control of the (n + 1) th time, n
In the + 1st operation control, the MPU 12 sends a control signal to the driver circuit 11 so that the DC motor 5 is supplied with electric power so as to rotate upward by the amount obtained by subtracting the nth upward tilting rotation angle from the n + 1th downward tilting rotation angle. To supply. Since the control is performed in this way, when the upward tilting is completed no matter how many times the operation control is performed, the position is shifted from the initial position by only the amount of upward inertial rotation of that time, and the original initial Return to position.

Therefore, according to the control device for a remote control side mirror according to this embodiment, the current i supplied to the DC motor 5 in accordance with the rotational operation of the DC motor 5 for adjusting the tilt angle of the mirror body 4. Focusing on the fluctuation, the rotation angle of the DC motor 5, that is, the tilt angle of the mirror body 4 is detected based on the change state of the current i. Therefore, an encoder, a potentiometer, or the like is provided inside the side mirror 1. Even if the above sensor is not provided, the tilt angle of the side mirror 1 can be accurately detected and controlled by a simple and inexpensive device. And in this control,
Since the start of tilting upward is shifted to the left and right by a predetermined start delay angle, it is possible to distinguish between a pulse that is actually rotating and a false pulse that is a noise signal. It is possible to always return to the position closest to the initial position by using only the pulse to be controlled for the control. Since the signal that detects the gear selection state of the transmission is used as the signal for starting the downward and upward tilting, the left and right side mirrors 1 and 2 are automatically set by simply putting the gear in reverse in order to move the vehicle back. When the movable part of No. 1 tilts downward from the initial position to a predetermined position, and when the gear is switched from reverse to another gear after finishing the back movement, the movable parts of the left and right side mirrors 1, 1 automatically tilt upward. Then, the driver returns to the initial position, and the driver does not need to perform tilting start operation and tilt angle adjustment.

Further, since it is not necessary to secure a space for the sensor inside the side mirror 1, it is possible to satisfy the demands for its compactness and improvement in design freedom. In addition, this control device can easily retrofit a general electric remote-controlled mirror in which the remote controller operation switch is manually operated to adjust the mirror angle without requiring extensive machining. In addition to the above, it is possible to obtain an excellent effect that the appearance of the mirror is not spoiled at that time.

The present invention is not limited to the above embodiment, but includes various other embodiments. That is, in the above 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 to this, and the rotation angle of the DC motor 5 is not limited to this. It is also possible to detect the voltage applied between the terminals and detect the rotation angle of the DC motor 5 based on the change state of this voltage.

In the above embodiment, the DC motor 5 has three slots, but the present invention is not limited to this.
For example, the present invention can be applied to those having 4 to 2 slots, and further to a brushless motor.

Further, in the above embodiment, an example in which the present invention is applied to a door mirror is shown, but the present invention is not limited to this, and may be applied to a fender mirror, or to other electrical components for automobiles that operate simultaneously on the left and right. It doesn't matter.

Further, in the above embodiment, an example in which the present invention is applied to vertical tilt control is shown, but the present invention may be applied to horizontal tilt control.

[0044]

The present invention is carried out in the form as described above, and has the following effects.

According to another aspect of the present invention, there is provided a control device for a remote control side mirror of an automobile, in which a direct current is supplied based on a change state of an electric power supply amount caused by a rotation operation of a direct current motor which tilts a movable part of the side mirror up and down. The rotation angle of the electric motor is detected by the rotation angle detecting means, and the amount of electric power supplied to the left and right DC electric motors is adjusted based on this rotational angle, and a difference is provided between the left and right electric power supply start timings when tilting upward. Since the noise signal detected by the rotation angle detecting means is identified and eliminated, it is possible to always return to almost the initial position after the downward and upward tilting is completed.

According to the second aspect of the present invention, since the downward and upward tilting start signals of the movable portion of the side mirror of the present invention are used as the detection signals of the gear selection state of the transmission, it is automatically selected by selecting the gear. Since the movable portion of the side mirror tilts downward or upward, good usability can be obtained.

According to the third aspect of the present invention, the difference between the upward and downward tilting rotation angles is subtracted from the next downward tilting rotation angle for control, so that the approximate initial position can be accurately returned with simple control. .

According to the invention of claim 4, the time obtained by adding the delay time to the power supply time to one of the DC motors is longer than the time obtained by adding the inertia rotation time to the power supply time to the other DC motor. The noise signal and the rotation angle signal can be reliably distinguished.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a door mirror to which the embodiment is applied.

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

FIG. 4 is an explanatory diagram showing a state in which a contact state between a commutator and a brush changes in accordance with a rotation operation of a DC motor.

FIG. 5A is an explanatory diagram showing a correspondence relationship between a rotation angle of a DC motor and a change state of a motor current, and FIGS.
(D) is explanatory drawing which shows the output after carrying out the signal processing of this motor current in steps.

FIG. 6 is a timing chart of power supply and pulse generation to the left and right DC motors in conventional control.

FIG. 7 is a timing chart of power supply to the left and right DC motors and generated pulses in the present embodiment.

[Explanation of symbols]

1 Door mirror (side mirror) 4 Mirror body 5, 5R, 5L DC motor (DC motor) 8 Remote control operation switch (external signal detection means) 9 Gear selection position switch (gear selection detection means) 11 Driver circuit (power adjustment circuit) 12 MPU (control means) 13, 13R, 13L Motor rotation angle detection circuit (rotation angle detection means) 25 Base plate (movable part of side mirror) 34 False pulse (noise signal) T Start delay angle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomoyuki Ichi             23-9 Imaikecho, Anjo City, Aichi Prefecture Mitsubishi Electric             Line Industry Co., Ltd. Okazaki Development Center F term (reference) 3D053 FF03 FF08 FF14 GG06 HH18                       MM02 MM03 MM08 MM25 MM44                 5H572 AA03 BB05 CC02 DD07 EE04                       FF06 FF09 HA01 HB12 HC01                       HC08 JJ03 JJ26 KK05 KK07                       LL22 LL32 LL33

Claims (4)

[Claims] 1. A power supply to the direct current motor is connected to two direct current motors respectively driving movable parts of left and right remote control side mirrors of an automobile so as to adjust a vertical tilt angle of the mirror body. A controller for a remote control side mirror that controls the operation of the movable part by adjusting the external signal detecting means for detecting an operation signal from the outside, and a power adjusting circuit for adjusting the power supply to the DC motor. And two rotation angle detectors provided between the power adjustment circuit and both DC motors for detecting the rotation angle of the DC motor based on the change state of the power supply amount accompanying the rotation operation of the DC motor. Means and control means for controlling the power supply to the DC motor by the power adjustment circuit based on the signal from the rotation angle detection means. A series of controls for tilting the movable part of the side mirror downward from the initial position and then tilting it upward to substantially return to the original initial position are performed. A downward tilting start signal is input from the external signal detecting means. Then, the power adjusting circuit supplies electric power to the DC motors so that the movable parts of the both side mirrors tilt downward from the initial position by a predetermined amount, and when the tilting downwards, the rotation angle detecting means detects them. The sum of the rotation angle during the power supply and the rotation angle due to inertia after the power supply is stopped is stored as the downward tilt rotation angle of both DC motors, and the downward tilt start signal is input from the external signal detection means. When the upward tilting start signal is input after the power is turned on, the electric power is supplied to one of the DC motors by the electric power adjustment circuit, and The movable portion of one of the side mirrors is tilted upward by the same amount as the stored downward tilting rotation angle and returned substantially to the initial position, and during the tilting, the DC motor is 1/6 or more of the downward tilting rotation angle 1 / When the tilting rotation is performed up to the start delay angle set to 2 or less, the power is supplied to the other DC motor by the power adjustment circuit, and the same amount as the stored downward tilting rotation angle of the other DC motor is stored. However, the movable portion of the other side mirror is tilted upward and is returned to the initial position substantially, and when the both side mirrors are tilted upward, the upward movement of the respective DC motors detected by the rotation angle detecting means during the upward power supply The sum of the rotation angle and the upward rotation angle due to the inertia after the power supply is stopped is stored as the upward tilt rotation angle, and the upward rotation due to the inertia is stopped. After that, the noise signal detected by the rotation angle detecting means is excluded from the inclusion in the upward tilting rotation angle, and in the next series of control of the movable portion of the side mirror, tilting upward is performed to substantially return to the initial position. 1. A control device for a remote-controlled side mirror of an automobile, characterized in that it is configured to use the upward and downward tilting rotation angles. 2. The external signal detecting means according to claim 1, wherein the external gear detecting means is a gear selection state detecting means of the automobile transmission, the downward tilting start signal is a reverse gear selection state detecting signal of the transmission, and the upward tilting start signal is A control device for a remote-controlled side mirror of an automobile, which is a selection state detection signal from the reverse gear to another gear. 3. The control of the movable part of the side mirror as set forth in claim 1 or 2, wherein the difference between the upward and downward tilting rotation angles in this control is subtracted from the downward tilting rotation angle in the next control. A control device for a remote-control side mirror of an automobile, characterized in that the rotation angle for tilting upward is supplied by supplying power in the next control. 4. Two DC electric motors respectively drive the movable parts of the left and right remote-controlled side mirrors of the automobile so as to adjust the tilt angle of the mirror body, and the electric power supplied to the DC electric motors is adjusted to move the movable portions. A method of controlling a remote control side mirror for controlling the operation of a DC motor, wherein the movable parts of both of the DC motors are tilted in one direction by a predetermined angle by supplying electric power to the DC motors. A step of storing the rotation angle during the power supply and the rotation angle due to the inertia after the power supply is stopped, and the movable parts of both of the above, the rotation angle during the power supply in each of the one direction and the inertia after the power supply is stopped. The electric power to one of the DC motors when tilting in the opposite direction by supplying electric power to each DC motor by the sum of the rotation angle The start of power supply is tilted by delaying the start of power supply to the other DC motor by a predetermined delay time, and the rotation angle of each DC motor during power supply and the rotation angle due to inertia after power supply stop are set. And a step of storing, wherein the predetermined delay time is the time obtained by adding the delay time to the power supply time to the one DC motor when tilting both movable parts in opposite directions, Is set to be longer than the time of power supply to the DC motor of the other DC motor plus the time during which the other DC motor is rotating by inertia after the power supply is stopped. How to control the mirror.