JPH06346661A - Power window control device - Google Patents

Abstract

PURPOSE:To perform reliable control of operation of a window glass by preventing the occurrence of a deviation within a range where a window glass is reversed. CONSTITUTION:Relative position detection of a window glass based on the number of counts of a position counter 9a and absolute position detection of the window glass based on turning ON of a position switch 7 mounted within the stroke of the window glass are performed. When the position of the window glass is detected by the position switch 7 and the number of counts of the position counter 9a is reduced to a value lower than a preset value, control is made so that the feed of a current to the motor 4 is suspended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window control device used for controlling a motor for driving a windshield of a vehicle by detecting a current position of the windshield.

[0002]

2. Description of the Related Art Conventionally, as a power window control device for controlling a motor for driving a window glass by detecting the current position of the window glass of an automobile,
The one shown in FIG. 5 is known. In the power window control device shown in FIG. 5, when a power window switch (not shown) connected to the motor 100 is turned on, current is supplied to the motor 100, so that the armature shaft 101 rotates. When the armature shaft 101 rotates, this armature shaft 101
Rotational power is transmitted to the worm wheel 102, and the rotational power of the worm wheel 102 is absorbed by the damper 1 for shock absorption.
It is transmitted to the output shaft 105 via 04. Output shaft 105
The window glass 1 via the glass lifting mechanism 106.
07 is connected, and the rotational power of the output shaft 105 is converted by the glass elevating mechanism 106 into movement of the window glass 107 on the fully closed side and the fully open side. A rotation detection mechanism 108 is attached to the armature shaft 101,
When the rotation of the armature shaft 101 is restricted by the movement of the window glass 107, the controller 109 cuts off the current supply to the motor 100. A limit switch 110 that is turned on when the window glass 107 is in the vicinity of the fully closed position is attached to the door portion supporting the window glass 107. When the movement is blocked due to a pinch of a finger or the like in front of the armature, the rotation detecting mechanism 108 operates on the armature shaft 101.
The current is cut off when the rotation of the motor is restricted, but the limit switch 110 is not turned on because the window glass 107 reaches before the fully closed position, and the controller 109 supplies the current to the motor 100. Since it is reversed, control is performed to move the window glass 107 from the position where the pinch occurs to the fully open side. Further, when the window glass 107 reaches the fully closed position, the limit switch 110 is turned on when the window glass 107 reaches the fully closed position, and the rotation detecting mechanism 108 restricts the rotation of the armature shaft 101 to supply a current. Since the cutoff is performed, control is performed to stop the window glass 107 at the fully closed position.

[0003]

In the above-mentioned conventional power window control device, the judgment as to whether or not to invert the window glass 107 is made by switching the limit switch 110 on and off. It is hard to say that the limit switch 110 attached to the door supporting the glass 107 does not shift due to loosening of the attachment portion due to vibration or the like, and in the unlikely event that the limit switch 110 moves in the fully closed moving direction of the window glass 107. If the window glass 107 reaches near the fully closed position, the motor 1
Since the range in which the current supply to 00 is stopped becomes large, the range in which the window glass is reversed when the entrapment occurs is relatively small, and when the window glass 107 is in front of the fully closed position. There is a problem in that there is a possibility that control is performed so that the wind glass 107 is not inverted even if pinching occurs in the
It has been a problem to solve this problem.

[0004]

It is an object of the present invention to provide a power window control device capable of surely controlling the operation of the wind glass by preventing an error in the range in which the window glass is inverted. Has an aim.

[0005]

[Constitution of the invention]

[0006]

A power window control device according to the present invention has an open switch and a close switch which are turned on by an operation of an occupant and an output shaft connected to a window glass, and the open switch or the close switch is turned on. Is supplied with a current for opening the window glass or a current for closing the window glass, and connects the motor that moves the window glass within the stroke between the fully closed position and the fully open position via the output shaft, and the power source is connected to the motor. Drive means for rotating, a rotation detecting means for detecting the number of rotations of the output shaft of the motor to generate a pulse signal, a position switch that is turned on when the window glass moves to a predetermined position within the stroke of the window glass, Position reference value near the fully closed position within the stroke of the windshield The position reference value storage means set for the reference rotation speed of the motor and the reference time storage means for setting the pulse cycle time corresponding to the reference rotation speed of the motor, and the reference movement amount of the wind glass set in advance. A reference value memory having a movement amount storage means, a position counter for counting current position data of the window glass by a pulse signal from the rotation detection means at any time, and a rotation state of the motor according to a current cycle time of the pulse signal from the rotation detection means. And a current value memory having a base point position memory for storing the count number of the position counter when the position switch is turned on, and a close switch is turned on. At this time, the position switch is not turned on, and the value of the pulse cycle timer is based on the reference time storage means. Is greater than the time and the count number of the position counter is greater than the position reference value of the position reference value storage means, or the value obtained by subtracting the value of the base point position memory from the count number of the position counter is the reference movement of the reference movement amount storage means. When it is smaller than the amount, it supplies an inverted current to the motor to open the window glass, and when the close switch is on, after the position switch is turned on, the value of the base position memory is calculated from the count value of the position counter. Controlling to stop the current supply to the motor when the subtracted value becomes smaller than the reference movement amount of the reference movement amount storage means and the value of the pulse cycle timer becomes larger than the reference time of the reference time storage means Is characterized by.

[0007]

In the power window control apparatus according to the present invention, when the position switch is not turned on when the close switch is turned on, the window glass is in the area to be inverted based on the information of the position switch. When the recognition is made and the value obtained by subtracting the value of the base point position memory from the counter number of the position counter becomes smaller than the reference movement amount of the reference movement amount storage means, based on the information of the base point position memory and the reference movement amount storage means. It is recognized that the window glass is in the area to be inverted, and the value of the pulse period timer becomes larger than the reference time of the reference time storage means, so that the window is detected based on the information of the pulse period timer and the reference time storage means. It is recognized that the glass has been blocked from movement, and this information tells the motor Translocation was of the window opening side current is supplied. When the close switch is turned on, the position switch is turned on to recognize that the window glass is in the area to be stopped without being inverted based on the position switch information. An area in which the window glass should not be inverted and stopped based on the information of the reference point position memory and the reference movement amount storage means because the value obtained by subtracting the value of the memory becomes smaller than the reference movement amount of the reference movement amount storage means. Is recognized, and the value of the pulse cycle timer becomes larger than the reference time of the reference time storage means, the movement of the windshield is blocked based on the information of the pulse cycle timer and the reference time storage means. Recognition of that
With this information, the current supply to the motor is stopped. Therefore, even if there is a displacement of the mounting position of the position switch, the region in which the window glass should be inverted does not become out of order.

[0008]

1 to 4 show an embodiment of a power window control device according to the present invention.

As is apparent from FIG. 1, the power window control device 1 according to the present invention mainly includes an open switch 2 which is switched to a window open side by an operation of an occupant, and a close switch 3 which is switched to a window close side by an operation of an occupant. , The output shaft 4a is connected to the window glass (see FIG. 5), and a current of the window opening side or the window closing side is supplied by switching the open switch 2 or the close switch 3, and the window glass is fully closed via the output shaft 4a. Motor 4 that moves within a stroke between the full open position, drive means 5 that connects a power source to motor 4, motor 4
Rotation detection means 6 for detecting the number of rotations of the output shaft 4a of the above and generating a pulse signal, a position switch 7 which is turned on when the window glass moves to near the predetermined fully closed position within the stroke of the window glass, It has a position reference value storage means 8a in which a position reference value is preset near the fully closed position, a reference time storage means 8b in which a reference time corresponding to the drive time of the motor 4 is set, and the wind glass is predetermined. The reference value memory 8 having the reference movement amount storage means 8c in which the set reference movement amount is set, and the position counter 9a for counting the pulse signal from the rotation detection means 6 as the current position data of the windshield at any time, and the rotation detection means. 6 has a pulse cycle timer 9b for detecting the rotation state of the motor 4 according to the cycle of the pulse signal from And a control unit 10 having a current value memory 9 having a base position memory 9c which count of the position counter 9a when the switch 7 is turned on is stored.

Open switch 2 and close switch 3
Are connected to the control means 10 via the input interface a, and the switching signals of the open switch 2 and the close switch 3 are recognized by the control means 10 via the input interface a.

The position switch 7 is attached to a door whose movement is supported by a window glass, and like the open switch 2 and the close switch 3, is connected to the control means 10 through an input interface a. The position switch 7 is turned on when a window glass reaches near the fully closed position while the window glass is moving toward the fully closed position, and a position detection signal is generated. The generated position detection signal is recognized by the control means 10 via the input interface a. Here, the vicinity of the fully closed position corresponds to a position having a dimension smaller than a clearance dimension generated when a finger or the like is caught when the window glass is moving toward the fully closed position.

In the motor 4, when the drive means 5 is turned on and the current on the window opening side or the window closing side is supplied, the output shaft 4a rotates in the forward or reverse direction. Output shaft 4
The window glass is moved toward the fully closed position or the fully opened position by rotating a normally or reversely. The rotation detecting means 6 is connected to the output shaft 4a, and the rotation detecting means 6 generates a pulse signal in synchronization with the rotation of the output shaft 4a, and the pulse signal generated by the rotation detecting means 6 passes through the input interface a. It is converted through and transferred to the control means 10.

The driving means 5 is a power source connection switching mechanism such as a relay, and is connected to the control means 10 via the output interface b, and a signal from the output stage of the control means 10 drives the motor 4 in the forward direction. Supply current in the opposite direction.

The control means 10 is provided with a microcomputer having a reference value memory 8 and a current value memory 9 built therein. The reference value memory 8 is a read-only memory (RO).
M), the position reference value storage means 8a provided in the reference value memory 8 is located in the vicinity of the fully closed position in the storage area corresponding to the stroke between the fully closed position and the fully open position of the window glass. The reference value is set in advance. The position reference value of the position reference value storage means 8a is compared with the current position data (count number) from the position counter 9a described later, and the count number of the position counter 9a becomes smaller than the position reference value of the position reference value storage means 8a. It is recognized that the windshield is in the fully closed position.

Further, the reference value memory 8 is provided with a reference time storage means 8b, and the reference time storage means 8b.
Sets a cycle time of a pulse generated by the motor 4 rotating in a steady state, and the set reference time is compared with a current cycle time from a pulse cycle timer 9b, which will be described later, and the pulse cycle timer 9b It is recognized that the windshield is prevented from moving because the current cycle time of is longer than the reference time.

Further, the reference value memory 8 is provided with a reference movement amount storage means 8c, and this reference movement amount storage means 8c sets a predetermined reference movement amount corresponding to the stroke amount of the windshield. The set reference movement amount is calculated from the count number of the position counter 9a after the count number of the position counter 9a is stored in the base point position memory 9c when the position switch 7 is turned on from the off state. It is compared with the value obtained by subtracting the value of the memory 9c, and the value of the compared result is larger than the reference movement amount, so that it is recognized that the window glass has moved more than a predetermined amount. Is done.

The current value memory 9 is a write / read memory (RAM) at any time, and the position counter 9a provided in the current value memory 9 stores the pulse signal from the rotation detecting means 6 in the storage area at any time. The current position data of the windshield is obtained by the position counter 9
The current position data stored in a is stored in the base position memory 9c when the position switch 7 is turned on from the off state, and is further stored as a result of subtracting the value of the base position memory 9c from the count number of the position counter 9a. The value is compared with the position reference value of the position reference value storage means 8a, and the result value becomes larger than the reference movement amount, whereby it is recognized that the wind glass has moved more than a predetermined amount, When the count number of the position counter 9a becomes smaller than the position reference value of the position reference value storage means 8a, it is recognized that the window glass has reached near the fully closed position.

Further, the current value memory 9 is provided with a pulse cycle timer 9b, and this pulse cycle timer 9b stores the current cycle time of the pulse signal from the rotation detecting means 6 as needed, and the pulse cycle timer 9b. The current cycle time stored by is compared with the reference cycle time of the reference time storage means 8b, and if the current cycle time becomes longer than the reference cycle time, it means that the output shaft 4a of the motor 4 is overloaded. Recognition is made. The current value memory 9 is also provided with a position buffer 9d, and this position buffer 9d has a function of temporarily storing the number of pulse signals from the rotation detecting means 6.

The present value memory 9 is provided with a base point position memory 9c. When the position switch 7 is turned on from the OFF state, the base point position memory 9c stores the count number of the position counter 9a at that time. The stored and stored value is used for subtracting the counter number of the position counter 9a and comparing with the reference movement amount of the reference movement amount storage means 8c.

In the control means 10, the close switch 3 is in the on state, the position switch 7 is in the off state, and the value obtained by subtracting the value of the base point position memory 9c from the count number of the position counter 9a is stored in the reference movement amount storage means 8c. It is recognized whether it is larger than the reference movement amount or the counter number of the position counter 9a is smaller than the position reference value of the position reference value storage means 8a, and any one of them is recognized and the pulse is detected. If the current cycle time of the cycle timer 9b is not longer than the reference time of the reference time storage means 8b, the motor 4 moving the windshield to the closing side recognizes that the motor 4 is in a steady state. In response to the turning on, the driving means 5 is turned on and the motor 4 is driven to move the window glass to the fully closed side.

In the control means 10, the close switch 3 is in the on state, the position switch 7 is in the off state, and the value obtained by subtracting the value of the base point position memory 9c from the count number of the position counter 9a is the reference movement amount storage means. It is recognized whether it is larger than the reference movement amount of 8c or the counter number of the position counter 9a is smaller than the position reference value of the position reference value storage means 8a, and any one of them is recognized. If the current cycle time of the pulse cycle timer 9b is longer than the reference time of the reference time storage means 8b and the position switch 7 is in the ON state, the position switch 7 detects the absolute position of the window glass. Drive to recognize that the windshield has reached the vicinity of the fully closed position where it should be stopped outside the range to be reversed. Turns off the stage 5 stops the supply of current to the motor 4.

In the control means 10, the close switch 3 is turned on, the position switch 7 is turned on from the off state, and the value obtained by subtracting the value of the base point position memory 9c from the count number of the position counter 9a is the reference movement amount. Storage means 8c
Is larger than the reference movement amount of the position counter 9
If the count number of a is smaller than the position reference value of the position reference value storage means 8a, the absolute position of the wind glass and the wind glass are detected based on the turning on of the position switch 7 and the count number of the position counter 9a. Is detected to recognize that the window glass has moved out of the range to be inverted and has reached the vicinity of the fully closed position to be stopped, the drive means 5 is turned off and the motor 4 is stopped. Stop supplying current. As a result, when the window glass moves from the fully open position to the fully closed position, it is set as a range to be reversed up to near the fully closed position, and as a range to be stopped from near the fully closed position. Is set.

Further, the control means 10 compares the current cycle time of the pulse cycle timer 9b with the reference time of the reference time storage means 8b when the open switch 2 is turned on, thereby controlling the output shaft 4a of the motor 4. In order to detect the rotation state, if the rotation of the output shaft 4a of the motor 4 is not restricted, the windshield is moved toward the fully open position in response to the turning on of the open switch 2, and the windshield reaches the fully opened position. The output shaft 4 of the motor 4
When the rotation of a is restricted, the wind glass is controlled to stop at the fully open position.

The power window control device 1 having such a structure performs control operation based on the programs shown in FIGS. 2, 3 and 4. In this program, steps 30 to 48 are the main routine, and steps 70 to 74 are interrupt routines executed prior to the main routine when the pulse signal generated from the rotation detecting means 6 by the rotation of the motor 4 is taken in. Is.

Since the window glass is fully closed, both the open switch 2 and the close switch 3 are in the off state, and the ignition switch (not shown) is turned on from the off state by the operation of the occupant, the power source is connected to the control means 10 at the same time. , The main routine is executed, reset is performed in step 30, each switch signal is fetched in step 31, the value of the position buffer 9d is stored in the position counter in step 32, and step 3
In step 3, it is determined whether or not the close switch 3 is on. Since the close switch 3 is off, step 3
In step 4, it is determined whether or not the open switch 2 is on. Since the open switch 2 is also off, step 3
In 5, the current supply to the motor 4 is stopped, the process returns to step 31, and this routine is repeated until the open switch 2 and the close switch 3 are turned on.

When the open switch 2 is turned on with the window glass fully closed, the process proceeds to step 36 by the determination in step 34. Therefore, in step 36, the current cycle time of the pulse cycle timer 9b is the reference time storage means 8b. It is determined whether the time period is longer than the reference time of, and if there is no obstacle to the movement of the windshield, the current cycle time is shorter than the reference time, so the step 3
7, the current is supplied to the motor 4 via the drive means 5 in response to the turn-on of the open switch 2 to open the window glass, and the process returns to step 31. Since the motor 4 is supplied with electric current for opening the windshield, the output shaft 4a starts to rotate and moves the windshield toward the fully open position. Since the output shaft 4a of the motor 4 starts to rotate, a pulse signal is generated from the rotation detecting means 6, so that an interrupt routine is executed and it is determined in step 70 whether the close switch 3 is on or not. At step 72, it is determined whether or not the open switch 2 is on. Therefore, since the open switch 2 is on, the value of the position buffer 9d is incremented at step 72 and the process proceeds to step 73. Pulse elapsed timer 9b
, And then the process proceeds to step 31 and the main routine is continuously executed. The open switch 2 continues to be turned on, and when the window glass reaches the fully closed position by supplying the electric current for opening the window glass to the motor 4 in step 37, the movement is blocked at the fully closed position, so that the motor 4 is closed. Since the rotation of the output shaft 4a is restricted, the process proceeds to step 38 according to the determination in step 36, and in order to stop the current supply to the motor 4 in step 38, the window glass is stopped at the fully closed position, and then step 31 is performed. Return.

When the occupant turns on the open switch 2, the window glass is moved to the fully open position while the open switch 2 is turned on, and when the window glass reaches the fully open position, the current supply to the motor 4 is stopped. Therefore, the occupant is notified that the window glass has reached the fully open position, and the open operation of the open switch 2 is prompted.

When the occupant turns on the close switch 3 while the windshield is in the fully open position, the switch signal is fetched in step 31, step 32.
Store the value of the position buffer 9d in the position counter 9a in step 33, and close switch 3 in step 33
Is determined to be ON or not, the process proceeds to step 39. Therefore, in step 39, it is determined whether or not the position switch 7 is turned on from the off state. Since the window glass is at the fully open position, the position switch 7 is not turned on. No, skip step 40, move to step 41, step 4
In 1, the value obtained by subtracting the value of the base point position memory 9c from the counter number of the position counter 9a is the reference movement amount storage means 8c.
Is determined to be greater than the reference movement amount of, and the window glass is in the fully open position, the process proceeds to step 43, and in step 43, the current cycle time of the pulse cycle timer 9b is longer than the reference time of the reference time storage means 8b. It is determined whether the time is long or not, and the motor 4 is not driven. Therefore, the process proceeds to step 44 to turn on the driving means 5, and in response to the closing switch 3 being turned on, the window glass for the motor 4 is closed via the driving means 5. Is supplied, and the process returns to step 31.

Since the motor 4 is supplied with electric current for closing the window glass, the output shaft 4a starts to rotate and moves the window glass toward the fully closed position. Since the output shaft 4a of the motor 4 starts rotating, a pulse signal is generated from the rotation detecting means 6, so that the interrupt routine is executed,
When it is determined in step 70 whether the close switch 3 is on or not, the process proceeds to step 74, and in step 74 the value of the position buffer 9d is decremented and then step 7 is performed.
In step 73, the time elapsed since the last interrupt was generated is stored in the pulse cycle timer 9b in step 73, and then the process returns to step 31.

If the close switch 3 is turned off while the window glass is moving toward the fully closed position in response to the close switch 3 being turned on, whether or not the close switch 3 is turned on in step 33. The determination proceeds to step 34, and the determination at step 34 proceeds to step 35, so that the current supply to the motor 4 is stopped and the windshield stops at the position where the close switch 3 is turned off.

When the window glass is moving toward the fully closed position in response to the closing switch 3 being turned on and pinching occurs before the fully closed position to prevent the window glass from moving, a step is performed. In step 33, the process proceeds to step 39, in step 39, step 40 is skipped and the process proceeds to step 41, and in step 41, the value of the base position memory 9c is subtracted from the count value of the position counter 9a. Since the calculated value is larger than the reference movement amount of the reference movement amount storage means 8c,
In step 43, since the current cycle time of the pulse cycle timer 9b becomes longer than the reference time of the reference time storage means 8b in step 43, the procedure moves to step 45,
In step 45, the position switch 7 is not turned on by the window glass depending on whether or not the position switch 7 is turned on. Therefore, the process proceeds to step 46, and the window glass on the side opposite to the on state of the close switch 3 is selected. An inverted current for opening is supplied to the motor 4.

The window glass that has moved toward the fully closed position in response to the close switch 3 is instantly inverted and moved to the fully open side from the position where the window was caught, so that the trapping is eliminated.

When the close switch 3 is turned on, the window glass continues to move toward the fully closed position without being pinched, and when the window glass passes near the fully closed position, the position switch 7 is turned on from the off state. A position detection signal is generated, the process proceeds to step 40 by the determination in step 39, and in step 40 the position counter 9
Since the value of a is stored in the base point position memory 9c, the value obtained by subtracting the value of the base point position memory 9c from the counter number of the position counter 9a in the determination in step 41 is less than the reference movement amount of the reference movement amount storage means 8c. When the size becomes large, the process proceeds to step 42. Here, when the position switch 7 is turned on, the position counter 9a at that time is detected in step 40.
Is stored in the base point position memory 9c, and the value obtained by subtracting the count number stored in the base point position memory 9c from the count number of the position counter 9a and the reference movement of the reference movement amount storage means 8c. In order to compare with the amount, the value of the subtraction result is small immediately after the position switch 7 is turned on, so the process proceeds to step 43,
After the position switch 7 is turned on, the size gradually increases with the lapse of time, and therefore the process proceeds to step 41. Step 4 moved by the judgment in step 41
In 3, it is determined whether the current cycle of the pulse cycle timer 9b is longer than the reference time of the reference time storage means 8b, and the window glass that has passed near the fully closed position is blocked from moving at the fully closed position. Since the rotation of the motor 4 is restricted, the current cycle time of the pulse cycle timer 9b becomes longer than the reference time of the reference time storage means 8b. Therefore, the process proceeds to step 45, and the position switch 7 is turned on in step 45. It is recognized that the window glass is in the state, and the window glass has passed through the vicinity of the fully closed position and is in the on state.
To the step 31 is stopped, and the process returns to step 31.

Therefore, assuming that the mounting position of the position switch 7 is deviated to the lower side opposite to the movement of the window glass on the closing side, the position switch 7 moves more than usual when the window glass is moving to the closing side. Is turned on sooner, and the position switch 7 is turned on earlier so that step 40
Since the count number of the position counter 9a stored in the base point position memory 9c becomes small in step 41, the value obtained by subtracting the value of the base point position memory 9c from the count number of the position counter 9a in step 41 is the reference movement of the reference movement amount storage means 8c. The value immediately becomes larger than the amount, and the routine proceeds to step 42, where it is judged that the count number of the position counter 9a is smaller than the position reference value of the position reference value storage means 8a. The current supply to is stopped.

Even if the mounting position of the position switch 7 is displaced to the lower side of the door, after the position switch 7 is turned on to detect the absolute position of the window glass, the window is detected based on the count number of the position counter 9a. Since the relative position of the glass is detected, the wind glass is inverted at a predetermined inversion position.

[0036]

As described above, since the power window control device according to the present invention is configured as described above, even if the position switch is displaced from the mounting position, the range in which the window glass is reversed does not change. It has an excellent effect that the operation control of the windshield can be surely performed.

[Brief description of drawings]

FIG. 1 is a block diagram of a power window control device according to the present invention.

FIG. 2 is a flowchart illustrating a control operation of the power window control device shown in FIG.

FIG. 3 is a flowchart illustrating a control operation of the power window control device shown in FIG.

FIG. 4 is a flowchart illustrating a control operation of the power window control device shown in FIG.

FIG. 5 is a block diagram of a conventional power window control device.

[Explanation of symbols]

 1 Power window control device 2 Open switch 3 Close switch 4 Motor 4a Output shaft 5 Driving means 6 Rotation detecting means 7 Position switch 8 Reference value memory 8a Position reference value storage means 8b Reference time storage means 8c Reference movement amount storage means 9 Current value Memory 9a Position counter 9b Pulse cycle timer 9c Base point position memory 10 Control means

Claims (1)

[Claims] 1. An open switch and a close switch which are turned on by an operation of an occupant, and an output shaft connected to the windshield and an electric current for opening the windshield or closing the windshield when the open switch or the close switch is turned on. Motor for moving the window glass within the stroke between the fully closed position and the fully open position via the output shaft, the drive means for connecting the power source to the motor, and the rotation of the output shaft of the motor. Rotation detecting means for detecting a number and generating a pulse signal, a position switch that is turned on when the window glass moves to a predetermined position within the stroke of the window glass, and a fully closed position within the stroke of the window glass A position reference value storage means for setting a position reference value in the vicinity of And a reference value memory having a reference time storage means in which a pulse cycle time corresponding to the reference rotation speed of the motor is set, and a reference movement amount storage means in which a predetermined reference movement amount of the window glass is set, A position counter that counts the current position data of the window glass by a pulse signal from the rotation detection means at any time, and a pulse cycle timer that detects the rotation state of the motor based on the current cycle time of the pulse signal from the rotation detection means. And a control means having a current value memory having a base point position memory in which the count number of the position counter is stored when the position switch is turned on, and the position switch is turned on when the close switch is turned on. And the value of the pulse period timer is larger than the reference time of the reference time storage means, and When the count number of the position counter is larger than the position reference value of the position reference value storage means, or when the value obtained by subtracting the value of the base point position memory from the count number of the position counter is smaller than the reference movement amount of the reference movement amount storage means. Inverted current for opening the window glass is supplied to the motor, and when the close switch is on, after the position switch is turned on, the value obtained by subtracting the value of the base point position memory from the count value of the position counter moves as the reference movement. It becomes smaller than the reference movement amount of the amount storage means,
Further, the power window control device is characterized in that when the value of the pulse period timer becomes larger than the reference time of the reference time storage means, control for stopping the current supply to the motor is performed.