JPH03137384A - Control method for servo power window device of car - Google Patents

Abstract

PURPOSE:To prevent a window glass from dislocating by combining the processing of making initial of full open, when a battery is put on, with making initial of full open or close when full open or full close is sensed under normal operation. CONSTITUTION:When a battery is put on, a window glass is opened fully, and the initial of full open is carried out. Also at the time of window glass full opening due to the full open set by a degree-of-opening setting switch, initial of full open shall be performed. When full open or full close is sensed under normal operation, re-initial of full open or full close is to be made. Further, when a window glass inverting command is given, first a stop command for the previous action is emitted, and then a reversal command is given after passage of a set period of time. When pinching is sensed during rise of the window glass, the rise is stopped, followed by immediate downward motion at the specified stroke. Through combination of these processes, dislocation of the sensed value of position from the window glass actual position can be nullified.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of controlling a servo power window device for a vehicle.

Conventional technology In a power window device for a vehicle that opens and closes a window glass by forward and reverse driving of an electric motor, for example,
- As shown in Publication No. 196671, the operating switch is a sliding type (
A servo power window device has conventionally been developed that uses an opening degree setting switch (or rotary type) to automatically open and close a window glass to a desired degree of opening.

In such a servo power window device, a position sensor is installed to detect the opening position of the window glass, and the opening setting value set by the opening setting switch matches the window glass position information detected by the position sensor. The position sensor is a pulse generator that generates pulses corresponding to the rotation angle as the electric motor rotates, and the pulses generated by the pulse generator are Conventionally, methods have been proposed that count the number of windshields and detect the position of the window glass based on the counted value.

Problems to be Solved by the Invention However, the control of positioning the window glass by counting the pulses that output the relative change of the window glass using a non-contact sensor as described above as a position sensor is difficult due to motor overruns and noise signals coming from the sensor. etc., a deviation occurs between the actual position of the window glass and the position recognized by the microcomputer (hereinafter referred to as microcomputer) from the signal from the position sensor, so this must be corrected.

Regarding the above correction, there is a method (see Japanese Utility Model Application Publication No. 193082/1982) that provides the corresponding correction value using a data map created in advance based on the motor rotational speed immediately before the motor stop command, speed fluctuation rate, window glass position, and vertical direction. This method has been developed in the past, but this method detects the actual situation that occurs when a sudden reversal is involved, such as when a danger avoidance function is activated by detecting an abnormality such as jamming while the window glass is operating. It is not possible to deal with discrepancies between the window glass position and the position recognized by the microcomputer, and when the stroke from full open to fully open is large, such as a satsushless door window glass, it is difficult to accurately determine the fully closed position. Correction methods are insufficient.

The main object of the present invention is to provide a method for accurately controlling the position of a door window glass without a door and smoothly performing position correction processing without giving a user a sense of discomfort.

Means and Function for Solving the Problems The present invention provides a door for a shutterless door in which a microcomputer controls the opening and closing of a window glass to a desired opening degree using an opening degree setting switch and a position sensor that generates a pulse according to the rotation angle of a motor. Servo power window devices have a self-active function that lowers the window glass to a predetermined opening degree when the door is open, making it easier to get in and out, and closes the window glass when the door is closed, based on the signal from the door switch that detects when the door is opened. Focusing on the fact that the holder has been previously developed, after inserting the battery, when the door is opened, the self-activation function will activate the window glass to fully open the window, and the opening setting switch will be set to fully open. When the window glass is fully opened, the initialization is performed even when the window glass is fully opened, and then the initialization is performed when the window glass is fully closed. When a re-initialization is performed and a command to reverse the window glass is input, the microcomputer first issues a command to stop the previous operation and then issues a reverse command after a set time. The pulse signal from the position sensor is counted as the pulse of the previous operation, and when a pinch is detected while the window glass is being raised, a safety function is activated that stops raising the window glass and immediately lowers it by a predetermined stroke. The device is characterized in that the device shifts to the reset mode by opening the door or setting the opening degree setting switch to fully open, performs a reset mode braking to initialize fully open, and then returns to normal operation. This makes it possible to almost completely prevent the position of the window glass from shifting in a sashless door where the stroke amount of the window glass varies widely.

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

A power window device to which the present invention is applied uses a slide type (or rotary type) opening degree setting switch as an operation switch for at least the driver's side door window glass in a satsuru door, as shown in FIG. 2, for example, Three drivers are used to drive the toggle switch 2, which is commonly used in the past, and the electric motor continues to drive only as long as it is turned on to either the up or down side as the operation switch for the door window glass on the passenger side and rear seat side. However, in Figure 1.2, only the toggle switch 1 for the passenger side door window glass is shown and the others are omitted).
In addition, a non-contact pulse generator such as a reed switch or a rotary encoder is installed in the electric motor 3 for driving the window glass of each door to generate pulses corresponding to the rotation angle as the motor 3 rotates. A microcomputer 5 (hereinafter simply referred to as microcomputer) counts the pulses of the position sensor 4 to recognize and store the position of the window glass, and based on the operation signals of the switches 1 and 2, The microcomputer 5 issues a signal to rotate the electric motor 3 forward or reverse via the motor control circuit 6,
It is designed to open and close the door and window glass.

Furthermore, a door switch 7 is provided to detect the opening and closing of each door, and when the door is opened, the window glass is lowered to a predetermined opening degree to make it easier for passengers to get on and off the vehicle, and when the door is closed, the window glass is fully closed or the door is closed. It has a self-activation function that raises the window glass to the opening position when it is opened.

As the opening setting switch 1, a binary switch that digitally signals the opening setting value is used, but the present invention is not limited to this. It may also be something that emits.

In the above power window device.

To prevent the window glass from shifting, ■ How to initialize the window glass position when the battery is inserted ■ How to do it when the power window device is operating its normal function ■ When the reverse operation command is issued while the window glass is moving in one direction. What to do if a person or object is caught during window glass operation ■ What to do if the safety function is triggered ■ Pulse count correction method to prevent malfunctions This is done by combining five methods.

The above five methods will be explained in sequence below.

First, when the battery is inserted in ■, the reset mode is 0, and when the door is opened with the ignition switch OFF, the self-active function is activated by the door open signal from the door switch 7, and the microcomputer 5 fully opens the window glass. A command is issued to fully open the window glass, and when it is detected that the window glass is fully open by detecting the locked state of the motor 3, a full opening initialization is performed and this is set as the reference position.

When the first window glass is fully opened after completing the above-mentioned initial procedure, a full opening initialization is performed using the number of pulses (for example, in the range of 560±12 pulses) from the reference position for fully opening, thereby raising and lowering the door window glass. Absorbs variations in stroke amount.

Even when the ignition switch is on and the door is opened, the self-activation function works to initialize the door fully open in the same way as above.

Also, when the microcomputer 5 detects that the opening degree setting switch 1 is set to fully open while the ignition switch is on and performs the full opening operation, the full opening is initialized when the motor lock detects the fully open state.

The above operation is a reset operation when the power is temporarily turned off due to battery replacement, for example, and the microcomputer 5 loses memory of the window glass position and becomes unable to detect the position.

In this way, by using the self-activation function that has been conventionally equipped to facilitate boarding and alighting, it is possible to perform the initial full-open operation without any unnaturalness, and by using the full-open position as the reference position, variations in the amount of lifting and lowering strokes can be avoided. The position of the window glass can be detected easily and accurately in a large sashless door.

In addition, the detection of fully open and fully open window glass is performed when the motor 1 is locked in a fully open region and a fully closed region set in a predetermined stroke range near fully open and near fully closed (each set to a range of approximately 10 layers). When this is detected as zero motor rotation speed or an increase in motor current, it is determined that the window glass is fully open or fully closed, and motor lock is detected in areas other than the fully open and fully closed areas.1 2 If this occurs, it is determined that there is an abnormal situation in which a human body or object has been caught.
If it is in the process of ascending, it stops and immediately shifts to descending to avoid danger.

The full open and full open initial states when the battery is inserted are toggle switch 2 after turning on the ignition switch.
After operating the toggle switch 2 in the opening direction to fully open it,
This can also be done by operating the switch in the closing direction to fully close it.

Next, a description will be given of the case where the power window device described in (2) above is operating its normal function.

In this state, set the opening setting switch 1 to the fully open position or operate the toggle switch 2 in the open direction, and with these window glass opening operation signals input to the microcomputer 5, the window glass is fully opened by the motor lock. When detected, a predetermined time after the detection of the fully open position (usually about 0.5 to 0.7 seconds)
After continuing the lowering operation, the motor 3 is stopped and a full-open re-initialization is performed.

Also, when the self-active function operates to fully open the window glass, the motor is stopped after a predetermined period of time after the fully open position is detected by the motor lock, and the fully open position is reinitialized.

Either set the opening setting switch 1 to the fully closed position or operate the toggle switch 2 in the closing direction to fully open the door, or the door switch 7 will issue a door close signal and the self-active function will fully close the window glass. If any one of these window glass closing operation signals is input to the microcomputer 5 and the window glass is fully closed due to the motor lock, it will wait for a predetermined period of time (usually 0.5 to 0) after the motor lock is detected. ．．
After continuing the upward movement (about 7 seconds), the motor 3 is stopped and the full-open re-initialization is performed.

In this way, during normal operation of the power window device, by repeating the re-initialization every time the window glass is fully opened, it is possible to almost completely prevent the window glass from shifting.

Next, control when the window glass reversing operation command (2) is input to the microcomputer 5 will be explained.

3 4 The pulse count during the window glass raising/lowering operation is based on the motor rotation direction command of the microcomputer 5 (i.e., the motor control relay signal of the motor drive circuit 6) based on the open or close operation signal from the opening setting switch 1 or the toggle switch 2, etc. Therefore, for example, if the opening setting switch 1 is switched to the closing direction while the window glass is being opened by the opening signal from the opening setting switch 1, and the closing signal is input to the microcomputer 5. In this case, even if the motor control relay is switched by a command from the microcomputer 5, the motor 1 cannot be reversed immediately and continues to open somewhat, but the pulses input from the position sensor 4 during that time are counted as pulses in the closing direction. This will result in a large positional shift.

Therefore, when such a sudden reversal command is input, the microcomputer 5 performs the following pulse counting process.

That is, when a sudden reversal command is input, the microcomputer 5 first issues a command to stop the previous operation, and then waits for a set time (a time corresponding to the motor overrun time, approximately 0.3 seconds).
(set to a certain degree) and issue a reversal command to reverse the motor.

By doing this, for example, if a close operation signal is suddenly input in the middle of an opening operation, a reversal command has not yet been issued for the set time after the opening operation stop command is issued, so the The pulses input from the position sensor 4 are counted as opening pulses, and the pulses after the reversal command is issued are counted as closing pulses, thereby preventing the window glass from shifting. ,
The actual movement of the window glass is the same as its natural movement, which starts reversing immediately after overrun, without any temporary stoppage, and does not cause any discomfort to the operator.

The control when the safety function operates as in (2) above will be explained below.

During the window glass closing operation (raising operation) in the middle of the above-mentioned fully open area and fully closed area, the motor rotation speed obtained by the pulse input from the position sensor 4 fluctuated by more than the set value. If this occurs, the microcomputer 5 determines that there is an abnormal situation in which a human body or object is trapped, and immediately stops the closing operation and shifts to the lowering operation, lowering the window glass a predetermined stroke (approximately 25 to 30 layers). There is a safety feature that shuts it down.

After the above-mentioned entrapment is detected and the safety function is activated,
When the door is opened and the door open signal from the door switch 7 is input, or when the window glass is fully opened by operating the opening degree setting switch 1 or toggle switch 2, the mode shifts to the reset mode (2) above, and the initial setting for fully open is set. After doing so, it returns to normal operation.

That is, when the door is opened after the above-mentioned safety function has been activated, the system shifts to the reset mode described in (2) above, and as in the case (2), the microcomputer 5 instructs the window glass to be fully opened, fully opens the window glass, and performs the initial fully open operation. Return to normal operation.

Alternatively, set the opening degree setting switch 1 to fully open or operate the toggle switch 2 in the open direction to fully open the window glass, perform the initial fully open operation, and then return to normal operation.

In this way, displacement of the window glass after the safety function has been activated is prevented.

Next, the above-mentioned pulse count correction will be explained.

The signal input circuit from the position sensor 4 to the microcomputer 5 generates various noises such as brush noise of the motor 3, noise caused by arc discharge such as contact noise of the motor power supply, and noise caused by fluctuations in magnetic field energy such as reactor (dielectric) noise. Noise is input to the microcomputer 5 together with the pulses from the position sensor 4, and such noise may cause the microcomputer 5 to make a counting error and cause a positional shift.

The signal input from the position sensor 4 to the microcomputer 5 is processed by hardware using, for example, a noise filter as shown in FIG. 3, but this alone is not sufficient.

Therefore, the frequency range of the normal output of the position sensor 4 is set to, for example, 130Hz to 250Hz, and the microcomputer 5 judges pulses in this frequency range to be normal position information and counts them, but signals outside the frequency range Software processing is performed to determine this as noise, and this removes both high-frequency arc discharge noise and low-frequency magnetic field energy fluctuation noise from the count, and prevents shifts in the window glass position due to miscounts. can.

In order to keep the positional shift of the window glass within a range that does not cause any practical problems in the servo power window device for satsuru doors, at least a combination of the above methods ① to ③ is necessary, and if method ③ is added to this, it will be even more accurate. It is possible to perform accurate position recognition and almost completely prevent positional displacement.

Effects of the Invention As described above, according to the present invention, in a servo power window device for a vehicle, the deviation between the actual window glass position and the detected value of the window glass position can be corrected without causing unnatural window glass movement. This can be almost completely prevented using only software processing, and can be particularly effective in servo power window devices for sashless doors, where the amount of vertical movement of the window glass varies widely.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, and FIG. 1 is a diagram showing the input/output elements of a microcomputer, and only shows the front left and right doors. FIG. 2 is an explanatory diagram illustrating the outline of a servo power window device to which the present invention is applied, and FIG. 3 is a circuit diagram showing an example of a noise filter for hardware processing noise. l...Opening degree setting switch, 2...Toggle switch,
3...Electric motor. 4...Position sensor, 5...Microcomputer, 6...Motor control circuit, 7...
・Door switch. More than 9 0

Claims (2)

[Claims] (1) An opening setting switch that can arbitrarily set the window glass opening is used as an operation switch, and a position sensor that generates a pulse corresponding to the rotation angle of the electric motor for driving the window glass is installed, and the microcomputer Based on the opening setting signal of the setting switch and the window glass position information obtained by counting pulses input from the position sensor, a signal is generated to control the drive of the electric motor, and the window glass is opened according to the opening setting value. A self-activated function that operates the door switch and detects the opening and closing of the door, opens the window glass to a predetermined opening degree with the door open signal from the door switch, and closes the window glass with the door close signal. In the servo power window device for sashless doors, which has the above microcomputer, when the battery is inserted,
When the door is opened, the above-mentioned self-activation function works to lower the window glass to the fully open position, and then performs the initial fully open operation.By setting the opening setting switch to fully open, the window glass moves to the fully open position, and performs the initial fully open operation. A reset mode control is performed in which a fully closed initial is performed when the window glass is fully closed for the first time after performing a fully open initial, and when the servo power window device is operating normally, the window glass is fully opened and closed. When fully closed is detected, the fully open and fully closed are reinitialized, and when a window glass reversal operation command is input, the microcomputer first issues a command to stop the operation of the front window glass, and then closes the position sensor within a set time. Control is performed by counting pulses input from the previous operation as pulses of the previous operation and issuing a command to reverse the window glass after the set time, and raising the window glass in a range excluding the position near the fully open position and the position near the fully closed position of the window glass. If the electric motor load fluctuates beyond the set range during operation, the microcomputer determines that an abnormal situation has occurred, and the safety function stops the window glass from rising, immediately shifts to lowering operation, and stops the window glass when it has lowered by the set amount. After the safety function is activated, the system moves to the reset mode by opening the door or setting the opening degree setting switch to fully open, and returns to normal operation after initializing the window to fully open. A method of controlling a servo power window device for a vehicle, characterized by performing the following steps. (2) In claim (1), the frequency of the normal signal of the position sensor is set within a predetermined value range, and the microcomputer determines signal input with a frequency outside the set frequency range as noise and invalidates it. A method of controlling a servo power window device for a vehicle, characterized in that: