JPH07166761A - Power window drive control device - Google Patents

Abstract

PURPOSE:To appropriately update a pulse count value even though a windshield pane comes to a stop at a position other than a position in a catch preventing and releasing range or the fully close (open) position during manual raising of the windshield pane. CONSTITUTION:When a windshield pane 52 is manually raised so that it comes up to a position near to the fully close position (in a catch preventing and releasing range), a motor is not deenergized at once even though the manipulation of a manipulating switch is released. Accordingly, the windshield pane 52 continues to rise up until the upper end of the pane 52 abuts against the inner bottom wall 50A of a rubber weather strip 50. Accordingly, it is possible to prevent erroneous resetting of a count value when the windshield pane 52 comes to a stop at a position in the catch preventing and releasing range during manually raising operation, thereby it is possible to prevent the count value from being out of order..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generates a pulse signal according to the forward / reverse direction and the rotation speed of a motor for driving a window glass up and down, and based on the rate of change of the pulse signal, fully closing or closing the window glass. Detects overload on the motor when fully opened,
The present invention relates to a power window drive control device that stops driving a motor.

[0002]

2. Description of the Related Art As a power window control device, the number of revolutions of a motor for driving window glass up and down is detected as a pulse, and a change in the pulse width causes a decrease in the number of revolutions of the motor during the rise of the window glass so as to trap foreign matter. There is known a power window control device having a trapping prevention function of detecting the trapping of a foreign substance and controlling the motor so as to stop the movement of the window glass and lower it by a predetermined amount when the trapping of the foreign substance is detected.

Although the rotation speed of the motor decreases even when the window glass is fully closed (fully opened), in this case, the number of pulses is counted and the count value at the fully closed (fully opened) position is stored.
When the number of rotations of the motor is reduced by this count value, the pinching is not performed.

In this type of power window control device,
As shown in FIG. 4, the foreign substance entrapment prevention operation of x + y (≦ x + 4) mm is not performed by adding the length x of the groove portion of the weatherstrip rubber 50 and the predetermined dimension y of the lower portion (for example, 4 mm or less). Some have a pinch prevention release area. This is because when the window glass 52 hits the inner bottom wall 50A of the weatherstrip rubber 50 while rising, the rate of change of the motor rotation speed changes in the same way as when foreign matter is caught, so it is prevented that foreign matter is caught. This is because

However, due to the miss count of the number of pulses, the trapping prevention release area (x + ymm) is erroneously detected, and the trapping avoidance operation is performed within the trapping prevention release area, or the trapping avoidance operation is prohibited outside the area. I have something to do.

[0006] Therefore, the applicant of the present invention, the fully closed (full open)
It is proposed that the count value be updated every time the motor load is automatically stopped in a nearby area (entrapment prevention release area) to prevent accumulated pulse deviation.

[0007]

However, when the window glass is closed by manual operation, the operation may be canceled when the upper end of the window glass 52 is hidden by the weatherstrip rubber 50. In such a case, the window glass 5
2 is stopped in a state in which a gap is formed between the upper end of 2 and the bottom of the weatherstrip rubber 50, but it is determined that the gap is in the region near the fully closed (fully opened) state, and a gap is formed. The count value may be updated with.

In consideration of the above facts, the present invention properly updates the pulse count value even when the window glass stops at a position other than the fully closed (fully open) position in the pinch prevention release area when the window glass is manually moved up and down. The purpose is to obtain a power window drive controller that can be implemented.

[0009]

According to a first aspect of the present invention, there is provided a power window control device, wherein a pulse signal is generated in accordance with a forward / reverse direction and a rotation speed of a motor for driving a window glass up and down, and a rate of change of the pulse signal. A power window drive control device that detects an overload applied to the motor when the window glass is fully closed or fully opened based on the above, and is a power window drive control device that stops the driving of the motor, and a pulse counter that counts by adding or subtracting the number of generated pulses, Storage means for storing a count value when the window glass is fully closed or fully opened by the pulse counter, and whether the window glass is located within a predetermined area from the fully closed or fully opened position based on the count value by the pulse counter. Determining means for determining whether or not the motor is reversely driven by a predetermined amount when an overload of the motor is detected outside the area during the raising operation of the window glass. Entrapment avoidance control means, drive continuation means for continuing movement in the same direction when stopped by manual operation release in the area and fully closed or other than fully open when the window glass is raised and lowered, and the window glass is fully closed Or a resetting means for resetting the count value at the time of full closing or full opening stored in the storage means to the count value by the pulse counter every time it is fully opened.

[0010]

According to the invention described in claim 1, when an overload applied to the motor is detected in the entire area where the window glass moves, outside the predetermined area from the fully closed or fully open position, some foreign matter is detected. It is determined that there is a trap, and the motor is reversed by a predetermined amount to perform the trap avoidance operation.

On the other hand, since no pinching is possible within the area, it is judged that the motor is fully closed or fully opened, and the driving of the motor is stopped (or stopped after an extremely short time has passed).

In order to recognize the position of the window glass, a pulse signal is generated according to the forward / reverse direction and the rotation speed of the motor for driving the window glass up and down, and the count value of the fully closed position or the fully opened position is stored. It is performed by adjusting the pulse generated according to the driving of the motor.

Here, the stored count value of the fully closed (or fully opened) position and the pulse count value of the actual fully closed position or the fully opened position may be deviated due to a mechanical error or the like. Therefore, the resetting means resets the count value stored in the storage means every time the window glass stops within a predetermined area from the fully closed or fully opened position.

Here, when the window glass is moved up and down by an automatic operation, the stop within the predetermined area from the fully closed or fully opened position is always fully closed or fully opened, but manually (manually).
In the operation, the operation may be stopped in a predetermined area from the fully closed or fully opened position and at a position other than the fully closed or fully opened (a position with a slight gap). If resetting is performed in such a case, the count value may further deviate. Therefore, in the manual device, when the window glass is stopped within a predetermined area from the fully closed or fully open position, the drive continuation unit continues the movement in the same direction. This allows
Since the motor stops when the motor load is detected when the window glass is fully closed or fully opened, the count value can be reset accurately.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows the configuration of a power window control device 10 according to this embodiment. In this power window control device 10, as shown in FIG. 4, a window glass 52 defined by an inner bottom wall 50A of a weather strip rubber 50 provided on a window frame (not shown).
An entrapment prevention release area in which the entrapment prevention operation is not performed is set within a range of x + y (≦ x + 4) mm from the fully closed position of.

The power window control device 10 includes a motor 12 for raising and lowering a window glass 52, and the motor 1.
The pulse generator 14 that generates a number of pulses proportional to the number of rotations in the forward / reverse rotation direction of 2, and the control described later based on the number of output pulses from this pulse generator 14 and the input from the power window operation switch 16 described later. It has a microcomputer (hereinafter abbreviated as “microcomputer”) 18 that controls the motor 12 via a motor driver 32 according to an algorithm or the like.

The pulse generator 14 is a motor 1
The magnets (magnetic poles) having different polarities are magnetized at predetermined intervals on the armature (not shown) that is the rotating shaft of the second motor, and the change in the magnetic field caused by the rotation of the armature is picked up by a hall element (hall IC) (not shown) and the motor. A well-known structure for generating a number of pulses proportional to the number of rotations in the forward and reverse directions of 12 is used. The pulse generator 14 generates two types of pulses that are 90 degrees out of phase, and the forward / reverse direction of the motor 12 can be determined depending on which of these pulses rises first.

The power window operation switch 16 can be pressed in two steps in the ascending direction and the descending direction respectively. When the power window operating switch 16 is lightly pressed in the ascending direction, a manual raising command for raising the window glass 52 only while it is being pressed. Is output, and the window glass 52 keeps rising when it is strongly pressed in the ascending direction, and the manual descending command for descending the window glass 52 is output when it is lightly pressed in the descending direction. However, it is an external input means for outputting an automatic descending command in which the window glass 52 continues to descend when strongly pressed in the descending direction.

The microcomputer 18 includes an input port 20 and an RO
M (read only memory) 22, RAM (random access memory) 24, output port 26, and CPU connected to these via a system bus 28
(Central processing unit) 30 and the like are included.

The ROM 22 stores in advance control algorithms and the like corresponding to the flowcharts described later. In the RAM 24, a first area in which a count value of a counter (not shown) described later is sequentially stored, the CPU 30
Are provided with various areas such as a second area as a work area for performing various processes.

Next, the operation of the first embodiment configured as described above will be described with reference to the flowchart of the main routine of FIG. 2 showing the main control algorithm of the CPU 30.

This main routine starts
The operator operates the power window operation switch 16 to instruct a rise command (automatic or manual)
Is made to the CPU 30.

First, in step 100, a motor forward drive command is output to the motor driver 32 via the output port 26 to drive the motor 12.

In the next step 102, the count value of a counter (not shown) is fetched, and in step 104 the count value is stored in the second area of the RAM 24. Here, the counter operates in the interrupt routine shown in the flowchart of FIG. 3 when the window glass rises, and when the output pulse from the pulse generator 14 is input through the input port 20, the rising edge of this pulse is detected. This interrupt processing is performed at a timing, and the counted up values are sequentially stored in the first area of the RAM 24. An initial value n ₀ corresponding to the window glass fully closed position as a reference position is preset in this counter. Therefore, in steps 102 and 104,
This means that the CPU 30 once fetches the count value at that time stored in the first area of the RAM 24 and stores the fetched count value in the second area of the RAM 24.

It should be noted that this counter is counted down by an interrupt routine when the window glass descends.

At the next step 106, R at step 104
The difference between the stored the current count value n _i and the previous count value n _i-1 to the second area of _{AM24 (n i -n i-1} )
Is calculated to calculate the change rate R _n of the rotation speed of the motor. Since this main routine performs one cycle of processing at substantially constant time intervals based on the clock timing, the difference in count value is proportional to the rate of change in the number of rotations of the motor, and for convenience, R _n = (n _i −n _{i- 1} ) Can be treated as

In the next step 108, it is determined whether or not the rate of change R _n is less than or equal to a predetermined value, and if the result is negative, the process proceeds to step 120 to release the operation switch, that is,
It is determined whether or not the occupant who has been manually operating has released his / her hand from the switch, and in the case of a negative determination, the process returns to step 102 and the above-described processing / determination is repeated.

If an affirmative decision is made at step 120, then the processing advances to step 122, at which it is decided whether or not it is the entrapment prevention release area. When a negative determination is made in step 122, the window glass 52 is determined to be in the intermediate position, the process proceeds to step 124, the motor 12 is immediately stopped, and the processing in this routine ends.

On the other hand, if the affirmative determination is made in step 124, it is in the pinch release area, and the tip of the window glass 52 is not in contact with the inner bottom wall 50A of the weatherstrip rubber 50, and a slight gap is generated. It is determined that the motor 12 is in the operating state and the drive of the motor 12 is not immediately stopped, and the step 10
Return to 8. That is, regardless of whether the operation switch is not operated,
The raising operation of the window glass 52 is continued. In this case, since the upper end position of the window glass 52 is within the range of y + x, the occupant does not feel uncomfortable.

If the determination in step 108 is affirmative, the window glass 52 has come into contact with some foreign matter while it is ascending, or the window glass is raised to the fully closed position and the inner bottom wall 50A of the weatherstrip rubber 50 is fixed. Since it is either abutting, it proceeds to step 110 and R at step 104.
Based on the current count value stored in the second area of the AM 24, it is determined whether or not the position of the window glass 52 is in the above-mentioned pinch prevention release area.

If the determination in step 110 is affirmative, it is possible to determine that the window glass 52 is in the fully closed position, so the process proceeds to step 114 and the motor is stopped immediately (or after an extremely short time has elapsed). As a result, the window glass 52 is stopped at (the position determined to be) the fully closed position.

In the next step 116, the count value of the counter is reset to the initial value, and then the control ends. In addition,
In order to detect this fully closed position more accurately, other detection means such as a fully closed sensor may be installed.

On the other hand, if the determination in step 110 is negative, it is considered that the window glass 52 has come into contact with some foreign matter, and therefore the process proceeds to step 112 and the trapping prevention process is performed. This trapping prevention processing is specifically performed by controlling the motor 12 so that the window glass 52 is stopped at that position and then lowered by a predetermined amount and stopped. The control is terminated after the entrapment prevention process is completed.

As described above, according to this embodiment,
Every time the window glass 52 stops at the fully closed position, the count value of the counter is reset (reset) to the initial value, so that the chattering output of the pulse generator 14 when the motor 12 is stopped and the stop of the motor 12 are stopped. The error of the count value generated during the operation is canceled every time the initial value is reset, while the error of the count value does not significantly increase due to the addition of the reverse rotation direction pulse output additionally generated at the time of the start of the reverse reverse rotation. 52 based on count value by
Position detection and the vertical position control of the window glass 52 are accurately performed. Therefore, it is possible to improve the reliability of the detection / release of the foreign matter entrapment and the window glass up / down control.

Further, in the present embodiment, when the window glass 52 is raised by the manual operation to reach the vicinity of the fully closed position (in the pinch prevention release area), the motor is driven even if the operation switch is released. It does not stop immediately but keeps rising until the upper end of the window glass 52 completely contacts the inner bottom wall 50A of the weatherstrip rubber 50. Therefore, it is erroneous when stopped in the pinch prevention release area during manual operation. Therefore, the count value at the fully closed position (or the fully open position) is not disturbed without resetting the count value.

In the above embodiment, the counter value of the counter is reset to the initial value each time the window glass 52 is stopped at the fully closed position. However, the window glass 52 is stopped at the fully closed position. At this time, the count value may be reset to the initial value once every several times. Alternatively, it may be performed when the window glass is at the fully open position.

In the above embodiment, the rate of change R in the number of revolutions is R.
After determining whether _n is equal to or less than a predetermined value (step 108), it is determined whether or not it is the entrapment prevention release area (step 110), and if it is not the entrapment prevention release area, the entrapment prevention processing is performed and the entrapment is performed. If it is in the prevention release area, it is assumed that the window glass 52 is in the fully closed position.
Although the case of immediately stopping is illustrated, whether or not the rate of change R _{n of the} number of revolutions has become equal to or less than a predetermined value only in the case where it is not the post-entrapment prevention release region after the determination as to whether it is the entrapment prevention release region is performed first. May be determined.

[0038]

As described above, the power window drive control device according to the present invention, even when the window glass is stopped at a position other than the fully closed (full open) position in the pinch prevention release area when the window glass is manually moved up and down, There is an excellent effect that the pulse count value can be updated appropriately.

[Brief description of drawings]

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

2 is a flowchart of a main routine showing a main control algorithm of the CPU of FIG.

FIG. 3 is a flowchart of an interrupt routine.

FIG. 4 is a diagram for explaining a trapping prevention release area.

[Explanation of symbols]

10 Power Window Control Device 12 Motor 14 Pulse Generator 30 CPU (Memory Means, Entrapment Avoidance Control Means, Drive Continuing Means, Resetting Means) 52 Window Glass

Claims (1)

[Claims] 1. A pulse signal is generated in accordance with a forward / reverse direction and a rotation speed of a motor for driving a window glass up and down, and the motor is acted upon when the window glass is fully closed or fully opened based on a change rate of the pulse signal. A power window drive control device for detecting a load and stopping driving of a motor, wherein a pulse counter for counting the number of pulses generated by the pulse counter, and a count value when the window glass is fully closed or fully opened by the pulse counter Storage means for storing, a determination means for determining whether or not the window glass is located within a predetermined region from the fully closed or fully open position based on the count value by the pulse counter, and when the window glass is moved up. Entrapment avoidance control means for reversing and driving the motor by a predetermined amount when an overload of the motor is detected outside the area, and the above-mentioned area when the window glass is moved up and down. Drive continuation means for continuing the movement in the same direction when stopped by manual operation release inside and other than fully closed or fully opened, and stored in the storage means every time the window glass is fully closed or fully opened. A power window drive control device comprising: a resetting unit that resets a count value when fully closed or fully opened to a count value by the pulse counter.