JPH11247529A - Power window device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power window device which avoids an abnormality of a pinch-detection action when the temperature within a door panel gets to an extremely high temperature or an extremely low temperature to secure safety. SOLUTION: This device is provided with a window opening/closing motor 4, a motor driving part 3, a pulse generating part 5, a micro control unit 2, and an operating switch 1. The control unit 2 detects a parameter expressing a load weight of a window when the window is closed or opened. The parameter is compared with a preset basic median and when the parameter deviates greatly from the basic median, it is discriminated that something is caught. Then, the motor 4 is brought to a stop or reversely driven. In this case, a temperature sensor 9 is arranged within a door panel and an indicator 10 is disposed on the control unit 2. When the control unit 2 detects that a measured temperature of the sensor 9 has deviated from a specified temperature range, the action of an automatic moving-up switch and the pinch-detection action of the window are brought to a stop and suspension of the pinch-detection action is indicated on a display 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window device and, more particularly, to a power window device when the temperature in a door panel in which a pinch detection mechanism of the power window device is built becomes extremely high or low. The present invention relates to a power window device that stops a pinch detection operation and displays the stop of the pinch detection operation.

[0002]

2. Description of the Related Art Conventionally, various types of power window devices for automobiles have been known for detecting the pinching of an object in a window.
There is a power window device disclosed in Japanese Patent Application Laid-Open No. 61-60981.

The power window apparatus disclosed in Japanese Patent Application Laid-Open No. 61-60981 uses a motor load current value as a parameter value for detecting pinching of a window. It divides equally into divided moving areas, and presets a reference current value indicating whether or not a window has been pinched in each divided moving area, and the window moves through each divided moving area. When the motor load current value is detected, the detected motor load current value is compared with the reference current value preset in the divided moving area, and the detected motor load current value is preset. When the current value is significantly exceeded, it is determined that pinching of the window has occurred, and the movement of the window is stopped.

In this case, the setting of the reference current value in the power window device disclosed in Japanese Patent Application Laid-Open No. 61-60981 is performed for each divided moving area when the window is moving in the divided moving area. The reference current value is set based on the peak value of the motor load current obtained when no pinching occurs. In particular, the preset reference current value is fixed once set. The value is not used, and after that, it is appropriately updated with the peak value of the motor load current obtained when the window moves through each of the divided moving regions, that is, has a learning function. is there.

As described above, Japanese Patent Application Laid-Open No. 61-60981 discloses
The power window device disclosed in the above document divides the entire moving range of the window into a plurality of divided moving regions, and a reference current value for determining whether or not a window is caught in each divided moving region. When the window moves in each divided movement area, the motor load current value unique to the moving divided movement area should be selected as the parameter value for detecting the pinching of the window. It has the advantage that it can be done.

In addition, as a power window apparatus for detecting the pinching of a window, a motor load torque is used as a parameter value for detecting pinching of the window, and the entire moving range of the window is divided into a plurality of divided moving areas. Equally divided, the reference median value indicating whether or not window entrapment has occurred in each divided moving area is preset, and when the window is moving in each divided moving area, the motor is While detecting the load torque value, the detected motor load torque value is compared with the reference median value preset in the divided movement area, and the detected motor load torque value is greatly increased. When it is determined that the window has been pinched when it exceeds the limit, the movement of the window may be stopped or reversed. It has already been proposed by the people.

[0007]

By the way, the power window apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 61-60981 and the power window apparatus proposed in the above-mentioned proposal both require a temperature when an automobile equipped with the power window apparatus is used. No consideration is given to the conditions.

That is, when an automobile is used, the temperature may be much higher or lower than the normal temperature depending on the place of use. In that case, a pinch detection mechanism of the power window device is built in. Similarly, the temperature inside the door panel becomes extremely high or very low, and under such a temperature condition, an error in detection of entrapment of the power window device increases. Specifically, for example, when the temperature is extremely low, the rotational friction of the motor is extremely increased, or the window glass is frozen, so even if the window is not actually pinched, even if the pinch is not generated. Is detected, the motor is driven in the reverse direction, and an operation of lowering the window (driving to the open state) is performed. In addition to such a mechanical cause, the electric circuit may be affected by temperature.

The present invention solves such a problem. An object of the present invention is to provide a power supply which can more reliably prevent the occurrence of pinching when the temperature in a door panel becomes extremely high or very low. A window device is provided.

[0010]

In order to achieve the above object, a power window device according to the present invention comprises a temperature sensor disposed inside a door panel and a display unit connected to a micro control unit. When the micro control unit detects that the measured temperature has deviated from the predetermined temperature range, the micro control unit stops the operation of the automatic ascent switch among the operation switches, stops the operation of detecting the pinching of the window, and detects the pinching of the window. Means for displaying the stop of the operation is provided.

According to the above means, in the micro control unit, when the temperature inside the door panel is measured by the temperature sensor and it is detected that the measured temperature has become a temperature at which the error of the operation of detecting the entrapment of the power window device becomes large. , Stopping the window raising operation based on the operation of the automatic raising switch in the operation switch to fix the window at the current position, stopping the window pinching detection operation in the power window device, and detecting the pinching on the display unit Indicating that the operation has stopped, and notifying the driver of the stoppage of the window jam detection operation. Then, if pinching occurs after this point, the driver can operate the manual lowering switch among the operation switches to open the window, thereby avoiding a dangerous state associated with pinching.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, a power window device has a motor that opens and closes a window via a window driving mechanism at the time of driving, a motor drive unit that drives the motor, and a motor that rotates. It has a pulse generation unit that generates pulses, a micro control unit that performs overall control drive processing, and an operation switch that manually opens and closes the window, and the micro control unit opens and closes the window via a motor drive unit At this time, the parameter value representing the load applied to the window is detected, and the parameter value is compared with a preset reference median value. A power window device that determines and stops or reversely drives a motor via a motor driving unit, A temperature sensor is arranged inside the display unit, and a display unit is connected to the microcontroller unit. In this case, the window raising operation based on the operation of the automatic raising switch is stopped, the window pinch detection operation is stopped, and the stop of the pinch detection operation is displayed on the display unit.

In one embodiment of the present invention, the power window device has a predetermined temperature range of −40 to 85 ° C.

In another embodiment of the present invention, in the power window device, the content indicating the stop of the pinch detection operation displayed on the display unit is displayed in red or in large characters.

According to these embodiments of the present invention, the temperature sensor is arranged inside the door panel,
The display unit is connected to the micro control unit, and the micro control unit measures the temperature inside the door panel using a temperature sensor.The measured temperature is the temperature at which the error of the detection operation of the pinching of the power window device becomes large. When detecting that there is, the operation of the automatic ascent switch in the operation switch is stopped, and the detection of the pinching of the window in the power window device is stopped, so that the detection of the erroneous pinching of the window is prevented. It is possible to further indicate that the pinch detection operation has stopped on the display unit, notify the driver that the window pinch detection operation has stopped, and prompt the user to manually operate the window. The driver carefully operates the manual up switch among the operation switches If the pinch still occurs, the driver can immediately operate the manual lowering switch of the operation switches and open the window to prevent damage to the pinched object. It is possible to obtain a power window device which can avoid a dangerous state and can secure safety as a whole.

When the measured temperature of the temperature sensor returns to within the predetermined temperature range, the display indicating that the entrapment detection operation has stopped disappears, and at the same time, the automatic ascent switch can be operated, and the entrapment detection operation is restarted.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the power window device according to the present invention.

As shown in FIG. 1, the power window device includes an operation switch 1 and a micro control unit (MC).
U) 2, a motor driving unit 3, a motor 4, a pulse generator 5, a pull-up resistor 6, a voltage dividing resistor 7, a pulse transmission line 8, a temperature sensor 9, and a display unit 10. Prepare.

[0020] The switch device 1 includes the three switches ₁ 1, 1 _2, 1 ₃ which is operated separately. Among these switches 1 ₁ to 1 _3, switch 1 ₁ is intended to command the window rising (closing) operation, the switch 1 ₂ is for commanding the window of lowering (opening) operation Only when the switches 1 ₁ and 1 ₂ are operated, the window moves in the designated direction.
_1, stopping one _second operation, also stops movement of the window. Switch 1 ₃ is for commanding the automatic continuation of the operation, when operated simultaneously the switch 1 ₃ and the switch 1 _1, begins the window is raised (closed) operates as described above, then switch 1 ₃ and also to stop the operation of the switch 1 _1, increase the window (closing) operation continues and the window is stopped when it reaches the top of the window frame. Further, when simultaneous operation of a switch 1 ₃ and the switch 1 _2, also has a window as described above begin to descend (open) operation, then, be stopped operation of the switch 1 ₃ and the switch 1 _2, the window The lowering (opening) operation is continued, and stops when the window reaches the bottom of the window frame.

The MCU 2 includes a motor drive voltage detector 11
, A pulse edge counter 12, a timer 13, a control / calculation unit 14, and a memory 15. Among these constituent elements, the motor drive voltage detection unit 11 detects a divided voltage representing a vehicle-mounted power supply (battery) voltage obtained at a voltage dividing point of the voltage dividing resistor 7. Pulse edge counter 1
2 detects the pulse edge of the two-phase square wave pulse supplied from the pulse generator 5. The control / arithmetic unit 14 generates a control signal corresponding to the operation state of the switch device 1,
The control signal is supplied to the motor 4 via the motor drive unit 3 to rotate the motor 4 and, at the same time, data supplied from the motor drive voltage detection unit 11 and the pulse edge counter 12 and stored in the memory 15. Based on the stored data, predetermined data processing, data calculation, and the like are performed, and the rotation state of the motor 4 is controlled via the motor drive unit 3. The memory 15 stores the reference median storage area 1
5 ₁ , reference allowable value storage area 15 ₂ , torque data addition value storage area 15 ₃ , start cancellation storage area 1
5 _4, divided travel region in the number of torque data storage area 1
5 _5, and a six storage areas consisting of a total number of torque data storage area 15 _6.

The motor drive unit 3 includes a control signal inversion 2.
Inverter 3 ₁ , 3 ₂ and motor rotation forward,
Reversing, two relays 3 _3, 3 ₄ switched set to one of the stops, and a two diodes 3 _5, 3 ₆ for spark prevention, according to the state of the control signal supplied from the MCU2 The motor 4 is driven to rotate.

The motor 4 has a rotating shaft connected to a window of the vehicle via a window drive mechanism (not shown). When the motor rotates, for example, when the motor rotates in the forward direction, the window closes, and when the motor rotates in the reverse direction, the window closes. open.

The pulse generator 5 is directly mounted on the motor 4 and is attached to the rotating shaft of the motor 4 and has a rotating body 5 having an S-pole and an N-pole magnetized on the opposite circumferential portion.
₁ and, near the circumferential portion of the rotary body 5 _1, the motor 4
And Hall elements 5 ₂ and 5 ₃ arranged so as to generate two-phase pulses having a phase difference of 90 ° from each other when rotating. When the motor 4 rotates, also co-rotating rotary body 5 ₁ by the rotation, the two Hall elements 5
₂ and 5 ₃ detect the magnetized portion of the rotating body 5 ₁ , and each of the _two Hall elements 5 ₂ and 5 ₃ has one cycle when the motor 4 makes one rotation. A wave pulse is output.

The pull-up resistor 6 is composed of three parallel coupling resistors connected between the output of the switch device 1, the input of the MCU 2, and the 5V power supply.
_1, 1 _2, supplies the power supply voltage (5V) 1 ₃ of the non-operation state to the input of the MCU 2.

The voltage dividing resistor 7 is mounted on a vehicle power supply (battery).
And two resistors connected in series between the ground and the ground. The connection point of these resistors is connected to the motor drive voltage detector 1 of the MCU 2.
Connected to 1.

The pulse transmission line 8 includes two pull-up resistors connected between the output of the pulse generator 5 and the 5 V power supply, a capacitor connected between the output and the ground, a synchronous output and the MCU 2. The two-phase square wave pulse output from the pulse generator 5 is transmitted to the pulse edge counter 12, comprising two series resistors connected between the pulse edge counter 12 and the input of the pulse edge counter 12.

The temperature sensor 9 is disposed inside a door panel in which a pinch detection mechanism of the power window device is built, and constantly detects and detects a temperature near the pinch detection mechanism of the power window device. Supply temperature to MCU2.

The display unit 10 is provided at a position that is relatively easily seen by the driver. Normally, no display is performed. However, when the pinch detection operation of the power window device is stopped, the fact that the display is stopped is displayed. Is displayed.

When the motor 4 rotates and the window is opened and closed, the two-phase square wave pulse generated by the pulse generator 5 is supplied to the MCU 2 via the pulse transmission line 8. At this time, the pulse edge counter 12
Each pulse edge (rising and falling) of the square wave pulse is detected, and an edge detection signal is supplied to the control / calculation unit 14 each time the pulse edge arrives. The control / arithmetic unit 14 sets the supply timing of the edge detection signal to the timer 1
3 and one edge detection signal followed by 1
An arrival time interval between the two edge detection signals (hereinafter referred to as edge interval data) is measured. It should be noted that one piece of this edge interval data is obtained every time the motor 4 makes a quarter turn.

The power window device shown in FIG. 1 uses a motor load torque as a detection parameter value to detect whether an object is pinched in the window. Calculated from the edge interval data of
In practice, it includes the weight of the window and the mechanical friction between the window and the sash. Further, the power window device shown in FIG. 1 separates the entire window movement area (the movement area between the fully open position and the fully closed position) based on the count number counted each time the edge interval data arrives. The moving area is set, and the window entrapment detection range that detects window entrapment in these moving areas is preset with a reference median value and a reference allowable value expressed by motor load torque as described later. Have been.

FIG. 2 shows the reference median value of the motor load torque and the motor load torque set in each divided moving area when the entire window moving area in the power window apparatus shown in FIG. 1 is divided into 36 divided moving areas. FIG. 9 is a characteristic diagram illustrating an example of a reference allowable value.

In FIG. 2, the ordinate indicates the motor load torque, and the abscissa indicates the count number counted each time the edge interval data arrives when the window moves from the fully open position to the fully closed position. The lower step-like characteristic (S) is the reference median value of the motor load torque, and the upper step-like characteristic (A) is the reference allowable value of the motor load torque (more precisely, the reference median value + the reference allowable value). The solid line (M) shows the process curve of the motor load torque when no object is caught in the window, and the one-dot chain line (H) shows that the object is caught in the window. 7 is a history curve of the motor load torque when the motor is turned on.

Here, the reference median value of the motor load torque shown in FIG. 2 is a motor load torque value required for moving the window when there is no substantial pinching in the window. This is determined based on the torque value already measured when the window is not present, and is updated by updating the reference median value to a new reference median value every time the window moves. As will be described later, the motor load torque is calculated from the edge interval data and the motor drive voltage, but one edge interval data is obtained every time the motor 4 rotates １ ／, that is, the motor load torque. When the window moves in the range from the fully open position to the fully closed position, that is, 3
When moving the six divided moving regions, 32 edge interval data are obtained in each divided moving region, so that a total of approximately 1200 edge interval data, and therefore, the same number of motor load torque data can be obtained. become.

The reference allowable value of the motor load torque shown in FIG. 2 is independent of the position of the divided moving area.
A constant value, which is generally determined by a standard or the like, a value obtained by converting the maximum allowable force that can be applied to a sandwiched object when a window is jammed into a motor torque,
A value obtained by adding some correction to the value is used.

Next, FIGS. 3 and 4 are flowcharts showing the outline of the operation of detecting the pinching of a window using the power window device shown in FIG.

The operation of the power window device shown in FIG. 1 will be described with reference to the flowcharts shown in FIGS.

First, prior to describing the operation of the flowcharts shown in FIGS. 3 and 4, the power window device executes the following operation.

[0039] That is, one switch in the switch device 1, for example, by operating the switch 1 _1, the input of MCU2 connected to the switch 1 ₁ is changed to the ground potential from the 5V potential. The control / calculation unit 9 of the MPU 2 supplies a control signal for rotating the motor 4 in the forward direction to the motor control unit 3 in response to the input ground potential, and the motor control unit 3 The relays 3 ₃ and 3 ₄ are switched to rotate the motor 4 in the forward direction. When the motor 4 rotates in the forward direction, the window moves in a closing direction via a window driving mechanism connected to the motor 4. In addition, the rotation of the motor 4 causes the pulse generator 5 attached to the motor 4 to generate a two-phase square wave pulse, and the generated two-phase square wave pulse is sent to the pulse edge counter 12 of the MCU 2 via the pulse transmission line 8. Supplied.

[0040] Here, when stopping the operation of the switch 1 _1, the input of MCU2 connected to the switch 1 ₁ is changed to 5V potential from the ground potential. Control / arithmetic unit 1 of MPU2
4 supplies a control signal to stop the rotation of the motor 4 to the motor control unit 3 in response to the input 5V potential, and the motor control unit 3
_3, 3 ₄ switches the stopped supply of power to the motor 4,
The rotation of the motor 4 is stopped. When the rotation of the motor 4 stops, the operation of the window drive mechanism connected to the motor 4 stops, and the window stops at the current position. When the rotation of the motor 4 is stopped, the generation of the two-phase square wave pulse by the pulse generator 5 attached to the motor 4 also stops, and the two-phase square wave pulse is not supplied to the pulse edge counter 12 of the MCU 2.

Next, another switch in the switching device 1, for example, by operating the switch 1 _2, as in the case described above, the input of MCU2 connected to the switch 1 ₂ is changed to the ground potential. The control / calculation unit 14 of the MPU 2 supplies a control signal for rotating the motor 4 in the reverse direction to the motor control unit 3 in response to the input ground potential, and the motor control unit 3 Three relays 3 ₃ , 3 ₄
And the motor 4 is rotated in the reverse direction. Motor 4
When the is rotated in the reverse direction, the window is moved in a direction to open the window via a drive mechanism connected to the motor 4. Also in this case, when the motor 4 rotates, the pulse generator 5 attached to the motor 4 generates a two-phase square wave pulse, and the generated two-phase square wave pulse is transmitted to the MCU via the pulse transmission line 8.
2 is supplied to the pulse edge counter 12.

[0042] Thereafter, when stopping the operation of the switch 1 _2, when co-operating with the switch 1 ₁ and the switch 1 _3, also operates in the case of simultaneous operation of the switch 1 ₂ and the switch 1 _3, each operation of the above The same operation as described above is performed, or an operation according to each of the above-described operations is performed.

When such an operation is performed, first,
In step S <b> 1, the control / calculation unit 14 determines whether or not the pulse edge counter 12 has detected the pulse edge of the two-phase square wave pulse supplied from the pulse generator 5. When it is determined that the pulse edge has been detected (Y), the process proceeds to the next step S2. On the other hand, when it is determined that the pulse edge has not been detected (N), this step is performed. S1 is repeatedly executed.

Next, in step S2, when the pulse edge counter 12 detects a pulse edge, the control / arithmetic unit 14
Edge interval data representing the time interval between the time when the previous pulse edge was detected and the time when the current pulse edge was detected is acquired.

Next, in step S3, the control / arithmetic unit 14 determines whether or not the acquired edge interval data is longer than a specified time (for example, 3.5 msec), that is, whether the acquired edge interval data is regular edge interval data. Or, determine whether the noise is present. Then, when it is determined that the edge interval data is longer than the specified time (Y), the process proceeds to the next step S4, and it is determined that the edge interval data is shorter than the specified time, that is, it is noise (N ), The process returns to the previous step S1, and the operations after step S1 are repeatedly executed.

Subsequently, in step S 4, the control / calculation unit 14 acquires the divided voltage detected by the voltage dividing resistor 7 in the motor driving voltage detecting unit 11 as the motor driving voltage E.

Subsequently, in step S5, the control / calculation unit 14 performs a calculation using the obtained motor drive voltage E and the edge interval data Pw to calculate a motor load torque Tc. The motor load torque Tc is calculated based on the following equation. That is,

[0048]

(Equation 1)

Next, in step S6, the control / arithmetic unit 14 of the MCU 2 detects the temperature measured by the temperature sensor 9 disposed inside the door panel.

Next, in step S7, the control / arithmetic unit 14 detects whether the temperature measured by the temperature sensor 9 is within a predetermined temperature range, for example, a temperature range of -40 to 85 ° C. When it is determined that the measured temperature is within the predetermined temperature range (Y), the next step S8
On the other hand, when it is determined that the measured temperature is not within the predetermined temperature range (N), the process proceeds to another step S23.

In the following step S8, the control / calculation unit 14 determines whether or not the pinching operation is currently stopped. When it is determined that the pinching operation is stopped (Y), the process proceeds to the next step S9, and when it is determined that the pinching operation is not stopped (N), the process proceeds to another step S12.

Subsequently, in step S9, the control / calculation unit 14 stops displaying on the display unit 11 a message indicating that the pinching operation is stopped.

Next, in step S10, the control and arithmetic operation unit 14 is set so that stop of the window of the raising operation based on the operation of the automatic raising switch 1 _1, 1 ₃ is released.

Next, in step S11, the control
The calculation unit 14 sets the pinch detection operation in the power window device to be executed.

Subsequently, in step S12, the control / calculation unit 14 determines whether the operation at the time of starting the motor 4 has been completed, that is, whether the cancellation at the time of starting has been completed. Then, it is determined that the operation at the time of starting is completed (Y).
Then, the process proceeds to the next step S13. On the other hand, when it is determined that the operation at the time of starting has not been completed yet (N), the process returns to the previous step S1 and the operations after step S1 are repeatedly executed.

Here, the reason for judging whether or not the operation at the time of starting the motor 4 is completed is as follows.
Since there is a stage where the internal torque of the motor 4 changes from a maximum state to a steady state, if the jamming is determined based on the motor torque value measured at this time, a large motor load torque value is used to measure the window. If this large motor torque value is used to update the reference median value, the new reference median value will not match the actual situation. This is because it may be set to a value.

For this reason, if it is determined that the operation at the time of starting the motor 4 has not been completed, the motor torque value averaging process for updating the reference median value is not performed, as described later. In this case, the determination as to whether or not the operation at the start of the motor 4 is completed is made based on a period from the detection of the first pulse edge to the detection of a predetermined number of pulse edges. If the startup behavior is not completed, that effect the start cancellation storage area 15 ₄ in the memory 15 is stored, the storage times are the procedure is cleared after a predetermined number of times.

Subsequently, in step S13, the control
The calculation unit 14 compares the motor load torque Tc calculated in the currently measured divided movement area with a value obtained by adding a reference allowable value to a reference median preset in the divided movement area (allowable reference value). I do. In this comparison, stores a fixed reference value tolerance without relates to all of the divided travel region base value storing area 15 ₁ and the divided moving area of the memory 15 storing the pre-set base value for reference tolerance value storage area 15 ₂ of there memory 15 is used.

Next, in step S14, the control / calculation unit 14 determines whether or not the motor load torque Tc is within a range of a reference median value plus a reference allowable value (allowable reference value). When it is determined that the motor load torque Tc is within the range of the allowable reference value (Y), the process proceeds to the next step S15, while the motor load torque Tc is determined.
Is determined to be outside the range of the allowable reference value (N), the process proceeds to another step S23.

Next, in step S15, the control
Calculating unit 14 adds all the motor load torque Tc calculated in one of the divided travel region in the current measurement, and stores the torque data addition value storage area 15 ₃ in the memory 15.

Subsequently, in step S16, the control / calculation section 14 counts the number of all motor load torques Tc obtained in one currently measured divided moving region, and stores the divided torque data in the memory 15 in the memory 15. stored in the number storage area 15 _5.

Subsequently, in step S17, the control
The calculation unit 14 calculates the current measurement value from the fully opened position of the window.
One of the number of all the motor load torque Tc obtained to split movement area counts, and stores the total number of torque data storage area 15 ₆ of the memory 15.

Next, in step S18, the control and computing unit 14 determines the current division travel region of the window from the total number of torque data stored in the total number of torque data storage area 15 _6.

Next, in step S19, the control
The calculation unit 14 determines whether or not the current divided moving area of the window has moved from one divided moving area to the next divided moving area based on the determination in step S17. And
When it is determined that the divided moving area of the window has moved to the next divided moving area (Y), the process proceeds to the next step S20, while the divided moving area of the window has not yet moved to the next divided moving area. (N), the process returns to the previous step S1, and the operations after step S1 are repeatedly executed.

Next, in step S20, the control
The calculation unit 14 sets a new reference median value in the one divided movement region from the value of the motor load torque Tc calculated in the one divided movement region. The setting of the new reference median value uses the average value of the values of the motor load torque Tc calculated based on the respective edge interval data obtained in the one divided movement area.

In step S21, the control / calculation unit 14 stores the reference median newly set in step S20 in the reference median storage area 15 in the memory 15.
Write ₁ in place of the previous reference median.

Subsequently, in step S22, the control / calculation unit 14 averages the area of the averaging process in the memory 15 used for obtaining the average value of the motor load torque Tc, that is, the torque data addition value storage area 15 _3. and initializing the divided travel region in the number of torque data storage area 15 _5. When this initialization is performed, the process returns to the previous step S1, and the operations after step S1 are repeatedly executed again.

[0068] The repetition of operation in such a flow chart, the driving of the motor 4 by the operation of such switch 1 ₁ or the switch 1 ₂ is stopped, or the movement of the window is performed to stop or, in step S23 to be described later When the pinching of the window is detected, the driving of the motor 4 is stopped, and the movement of the window is stopped or the motor 4 is driven to rotate in the opposite direction, and the movement of the window is reversed. Done.

In step S23, the control / arithmetic unit 14 supplies a control signal to the motor control unit 3 to
Switch the three relays 3 ₃ , 3 ₄ to stop the movement of the window by stopping the rotation of the motor 4, or to rotate the rotation of the motor 4 in the opposite direction to the rotation direction of the window to stop the movement of the window. It moves in the direction opposite to the previous direction, and operates to protect the object sandwiched in the window from damage.

Further, in another step S24, the control / calculation section 14 supplies a display signal to the display section 11, and a display indicating that the pinch detection operation in the power window device is stopped on the display section 11. I do. The display content at this time may be arbitrary, but it is preferable to display the display in red so as to be as conspicuous as possible, or to display it in large characters or pictures.

Next, in step S25, the control and computing unit 14 immediately prohibits the window rising operation based on the operation of the automatic raising switch 1 _1, 1 _3, to stop the window at the current position.

Next, in step S26, the control
The calculation unit 14 prohibits the pinch detection operation in the power window device, and proceeds to the previous step S17.

In this case, in the power window apparatus shown in FIG. 1, the operation according to the flowcharts shown in FIGS. 3 and 4 is executed, and the window moves from the fully open position to the fully closed position. When the window is not pinched, the characteristic as shown by the solid line (M) in FIG. 2 is obtained as the motor load torque, and the motor load torque is set in each divided movement region in all divided movement regions. It does not exceed the value obtained by adding the reference allowable value to the reference median (allowable reference value).

On the other hand, when the window moves from the intermediate position to the fully closed position and the window is pinched during the movement, the motor load torque is changed to a characteristic as shown by the dashed line (H) in FIG. Is obtained, and the motor load torque in the divided moving region where the entrapment occurs greatly exceeds the value obtained by adding the reference allowable value to the reference median value set in the divided moving region (permissible reference value). Things.

According to the power window device of the present embodiment in which such an operation is performed, the temperature measured by the temperature sensor disposed inside the door panel is the temperature at which the operation of detecting the entrapment of the power window device cannot be performed normally. When, the operation of the automatic ascent switch in the operation switch is stopped, the operation of detecting the pinch of the window is stopped, and furthermore, the indication that the pinch detection operation is stopped is displayed on the display unit, and the driver is notified. Since it is notified that the window entrapment detection operation is stopped, it is possible to avoid inconvenience due to erroneous operation of automatic entrapment detection, and it is possible to avoid entrapment by careful manual operation of the driver.

[0076]

As described above, according to the present invention, a temperature sensor is arranged inside a door panel, and a display unit is connected to a micro control unit. Measuring the internal temperature of the device, when detecting that the measured temperature is a temperature at which the detection operation of the pinching of the power window device cannot be performed normally, stops the operation of the automatic ascending switch among the operation switches, Since the window is fixed at the current position, damage to the pinched object can be prevented, and the window pinch detection operation of the power window device is stopped. The driver is notified that the operation has stopped, and the driver is notified that the detection of the pinching of the window has stopped. As a result, malfunctions of automatic pinch detection at extremely low or very high temperatures can be avoided, and the driver can be cautious of manual operation to avoid pinching and to keep the temperature within the specified temperature range. There is an effect that the detection of the entrapment can be automatically restarted when returning.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a power window device according to the present invention.

FIG. 2 shows a reference median value and a reference allowable value of a motor load torque set in each divided moving region when the entire window moving region in the power window device shown in FIG. 1 is divided into 36 divided moving regions. FIG. 9 is a characteristic diagram showing an example of the above.

FIG. 3 is a part of a flowchart showing an outline of an operation when detecting pinching of a window using the power window device shown in FIG. 1;

FIG. 4 is a remaining part of the flowchart showing the outline of the operation when detecting the pinching of the window using the power window device shown in FIG. 1;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 operation switch 1 ₁ , 1, ₂ , ₃ switch 2 micro control unit (MCU) 3 motor drive unit 4 motor 5 pulse generator 6 pull-up resistor 7 voltage divider 8 pulse transmission line 9 temperature sensor 10 display unit 11 motor Drive voltage detection unit 12 Pulse edge counter 13 Timer 14 Control / calculation unit 15 Memory 15 ₁ Reference median value storage area 15 ₂ Reference permissible value storage area 15 ₃ Torque data addition value storage area 15 ₄ Start cancel storage area 15 ₅ Dividing movement area Internal torque data number storage area 15 ₆ Total torque data number storage area

Claims (3)

[Claims] 1. A motor for opening and closing a window via a window driving mechanism at the time of driving, a motor driving unit for driving the motor, a pulse generating unit for generating a pulse corresponding to the rotation of the motor, and overall control. A micro control unit for performing a driving process, and an operation switch for manually operating the opening and closing of the window, the micro control unit, when opening and closing the window via the motor drive unit, the load applied to the window The parameter value is detected, the parameter value is compared with a preset reference median value, and when the parameter value deviates from the reference median value by a considerable amount, it is determined that pinching has occurred, and the motor drive is determined. A power window device for stopping or reversely driving the motor through a unit, wherein a temperature inside the door panel is reduced. A sensor is arranged, and a display unit is arranged to be coupled to the microcontroller unit. When the microcontroller detects that the temperature measured by the temperature sensor has deviated from a predetermined temperature range, the microcontroller unit has And stopping the window raising operation based on the operation of the automatic raising switch of (c), stopping the window pinching detection operation, and displaying the stop of the window pinching detection operation on the display unit. 2. The predetermined temperature range is −40 to 85 ° C.
The power window device according to claim 1, wherein 3. The power window device according to claim 1, wherein the content indicating the stop of the pinch detection operation displayed on the display unit is a display in red or a display in large characters.