JPH08199907A - Detector of opening and closing position of window glass of power window - Google Patents

Abstract

PURPOSE: To prevent a large displacement of opening and closing position of a window glass by constituting the title device of a motor for driving the opening and closing of the window glass, a microcomputer controlling an on-off switch and the motor so as to be rotated in the direction of the opening and closing of the window glass, and a pulse generator outputting a motor pulse signal corresponding to the number of revolution of the motor. CONSTITUTION: A pulse signal is output from a sensor for a pulse generator every one time per round while being synchronized with the revolution of a motor 11. The pulse number of the pulse signal is up-down counted separately in first and second positional counter areas in response to the revolving torque of the motor 11, and the place of the opening and closing of the window glass 51 is determined on the basis of each count value. Accordingly, a large displacement of determined opening and closing position from an actual position can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the opening / closing position of a window glass in a power window of an automobile.

[0002]

2. Description of the Related Art Generally, a power window is widely used in automobiles, as represented by a passenger vehicle, in which a window glass such as a door window is automatically opened and closed by driving a motor according to a switch operation. In the power window,
In order to detect whether or not a foreign object such as an article or a part of the body is caught between the door frame and the window glass, the window glass is set so as to be detected only within a predetermined opening / closing position area where the foreign object may be caught. A device for detecting the open / closed position is often attached.

As one of the conventional open / close position detecting devices,
The power window safety device disclosed in JP-A-5-321530 can be mentioned. In the power window safety device, the rotation direction of the motor is detected by using two sets of hall elements that output pulse signals whose phases differ by 90 ° as the motor rotates, and the pulse signals from the hall elements are detected by the motor. The open / close position of the window glass is detected by counting up / down according to the rotation direction.

As another conventional example of the trapping detection device, there is a window glass opening / closing device disclosed in Japanese Patent Laid-Open No. 165682/1988. In this window glass opening / closing device, the ripple current of the motor for driving the window glass opening / closing is shaped to generate a motor pulse signal according to the number of rotations of the motor. It counts up and down depending on whether the switch is operated or not, and finds the opening / closing position of the window glass.

In the window glass opening / closing device, in the second embodiment, the frequency f of the motor pulse signal obtained from the cycle Tp of the motor pulse signal is a high set frequency which does not occur at a normal motor rotation speed. If it exceeds f ₀ (f> f ₀ ), even if the position of the window glass obtained from the number of pulses of the motor pulse signal is within the opening / closing position area where foreign matter may be caught, the motor pulse signal The detection operation is canceled because noise is included in it.

[0006]

However, in the above-mentioned power window safety device, the pulse signal from the hall element contains noise, the pulse signal is leaked due to a failure of the hall element itself, or the pulse is outputted. If a signal count error or the like occurs, the up / down count of the pulse signal may be misaligned, and the opening / closing position of the window glass detected from the count number may be significantly deviated from the actual position. It was Further, although the window glass opening / closing device can detect the presence or absence of noise in the motor pulse signal based on the frequency f of the motor pulse signal, the effect of this is that a pulse count for detecting the opening / closing position of the window glass is used. It is not possible to detect whether or not an error has occurred. Therefore, similar to the power window safety device, the up / down count of the motor pulse signal may be misaligned, and the open / closed position of the window glass detected from the count may be significantly deviated from the actual position. There was a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to detect the open / close position of the window glass of the power window based on the pulse signal corresponding to the rotation of the motor. Even if the up / down count is misaligned due to noise from the device, pulse signal output, or omission of detection, the open / close position of the window glass that is detected based on the pulse signal count will not be significantly displaced from the actual position. It is an object of the present invention to provide a window opening / closing position detection device for a power window that can be used.

[0008]

In order to achieve the above object, the present invention is directed to a motor 11 as shown in FIG.
A window glass opening / closing position detection device for a power window that opens and closes the window glass 51 by means of a plurality of sets of pulse signal output means 31 _{1 to} 31 _n for outputting pulse signals P _{1 to} P _n synchronized with the rotation of the motor 11. And the number of sets of position counters corresponding to the pulse signal output means 31 _{1 to} 31 _n for counting up and down the number of output pulses of the pulse signals P _{1 to} P _n according to the rotation direction of the motor 11. Means 15A _{1 to} 15A _n and opening / closing position determining means 15B for determining the opening / closing position of the window glass 51 based on the count values C _{1 to} C _n of the position counter means 15A _{1 to} 15A _n are provided. And

Further, according to the present invention, the plurality of sets of pulse signal output means 31 _{1 to} 31 _n are configured to output the pulse signals P _{1 to} P _n.
Are output with their phases shifted from each other by a predetermined angle, and these plural sets of pulse signal output means 31 are output.
Further comprising a rotation direction detecting unit 15C for detecting the rotational direction of the motor 11 on the basis of the pulse signal P ₁ to P _n of from ₁ to 31 _n, wherein each position counter means 15A ₁
15A _n are pulse signals P depending on the rotation direction of the motor 11 detected by the rotation direction detection means 15C.
_The number of output pulses of _{1 to Pn} is counted up and down. Furthermore, the present invention includes a comparator means 15D for comparing to what the count value C ₁ -C _n of said each position counter means 15A ₁ to 15A _n, according to the comparison result of said comparing means 15D, each position counter unit 15A ₁ as the count value C ₁ -C _n of to 15A _n matches the count value C ₁ -C _n minimum position counter means 15A ₁ to 15A _n, the count of the other position counter means 15A ₁ to 15A _n Count value correction means 1 for correcting the values C _{1 to} C _n
5E was further provided.

Further, the present invention is non-output state of the pulse signal P ₁ to P _n from some of the pulse signal output means 31 ₁ to 31 _n of the plurality of sets of pulse signal output means 31 ₁ to 31 _n Pulse non-state detecting means 15F for detecting the state of the pulse, and the count value C _{1 of} each position counter means 15A _{1 to} 15A _n according to the detection result of the pulse non-state detecting means 15F.
Further, a second count value correcting means 15G for correcting C _n to C _n is further provided. Further, according to the present invention, the count values C _{1 to} C of the respective position counter means 15A _{1 to} 15A _n.
The detection area discriminating means 15H for discriminating whether or not _n is a value corresponding to the range of a predetermined detection area So for detecting the presence or absence of a foreign substance caught by the window glass 51, and the detection area discriminating means 15H. According to the determination result, the window glass 5
Further, a pinch detection unit 15J for detecting the presence or absence of the pinch of the foreign matter by 1 is further provided.

[0011]

According to the present invention, the number of pulses of the pulse signals P _{1 to} P _n output by the plural sets of pulse signal output means 31 _{1 to} 31 _n in synchronization with the rotation of the motor 11 is determined by the pulse signal output means 31. The position counter means 15A _{1 to} 15A _{n of the} number of sets corresponding to _{1 to} 31 _n count up and down according to the rotation direction of the motor 11, and the count value C ₁ to.
The opening / closing position determination means 15B determines the opening / closing position of the window glass 51 based on C _n . Therefore, part of the pulse signal output means 31 ₁ to 31 output leakage and the pulse signal P ₁ to P _n from _n, the pulse of the pulse signals P ₁ to P _n according to some of the position counter means 15A ₁ to 15A _n Even _if the count values C _{1 to} C _n of the position counter units 15A _{1 to} 15A _n are partially deviated due to a missing count or the like, the position counter unit ₁ does not operate.
5A ₁ to 15A by other normal count value C ₁ -C _n of _n, closing position determining means 15B determines the window glass 51
The open / close position of does not significantly deviate from the actual open / close position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a window glass opening / closing position detecting device for a power window according to the present invention will be described below with reference to the drawings. FIG. 2 is an explanatory diagram showing, in a partial block diagram, a schematic configuration of a power window equipped with a window glass opening / closing position detecting device according to an embodiment of the present invention. In FIG.
Are trapping detection devices for detecting the trapping of foreign matter. The power window mechanism 1 opens and closes the window glass 51 of the door 5, and has a motor 11 for opening and closing the window glass 51, an opening and closing switch 13 operated when opening and closing the window glass 51, and the opening and closing switch. It is configured by a microcomputer (hereinafter abbreviated as a microcomputer) 15 for controlling the motor 11 to rotate in the opening / closing direction of the window glass 51 according to the operation of 13. The entrapment detection device 3 includes a pulse generator 31 that outputs a motor pulse signal according to the rotation speed of the motor 11, the microcomputer 15, and the like.

The opening / closing switch 13 is provided, for example, on the upper surface of an armrest (not shown) inside the door 5, and has a conventionally known seesaw type operation button (not shown) that can be tilted forward and backward. It consists of a self-resetting mechanical switch. The open / close switch 13 outputs a lift request signal 13a for lifting the window glass 51 to the fully closed position side by operating the operation button so that the operation button is tilted forward, and the operation button is tilted backward. It is configured to output a lowering request signal 13b for lowering the window glass 51 to the fully open position side by operating.

The pulse generator 31 includes the motor 11
The pulse generator 31 is arranged outside of FIG.
, The first and second two sensors 31a, 3
1b (corresponding to pulse signal output means). The first and second sensors 31a and 31b each have a Hall IC 31 that generates an electromotive force when a magnetic field is applied in a predetermined direction.
c, 31d and A / D converters 31e, 31f for converting the electromotive force of the Hall ICs 31c, 31d into digital form. The Hall ICs 31c, 31d are arranged in the radial direction of the output shaft 11a of the motor 11. Output shaft 11
The distance from a is the same, and they are respectively arranged at positions shifted by 90 ° in the circumferential direction of the output shaft 11a.

The pulse generator 31 includes the output shaft 11
The magnetic field generated by the magnet 17 fixed to the motor a
Each Hall IC 31c,
Electromotive force is generated in each of 31d, and the electromotive force causes the first and second sensors 31a and 31b to generate the first and second pulse signals Pa and 50% with a duty ratio of 50%, as shown in FIG.
Pb is configured to be output once each time the motor 11 rotates once.

The upper part of FIG. 4 shows the first pulse signal Pa from the first sensor 31a and the lower part shows the second pulse signal Pb from the second sensor 31b. The arrow a in FIG. 4 indicates the window glass 51. Is the output direction of the first and second pulse signals Pa and Pb when the motor 11 is rotated in the direction in which the window glass 51 rises toward the fully closed position, and arrow B indicates the motor in the direction in which the window glass 51 descends toward the fully opened position. 11 shows the output directions of the first and second pulse signals Pa and Pb, respectively, when 11 rotates. As is clear from FIG. 4, when the window glass 51 is raised, the first pulse signal Pa from the first sensor 31a is generated.
Of the second pulse signal Pb from the second sensor 31b leads by 90 °, and when the window glass 51 descends,
The phase of the second pulse signal Pb from the second sensor 31b leads the phase of the first pulse signal Pa from the first sensor 31a by 90 °.

Next, the hardware configuration of the microcomputer 15 will be described with reference to the block diagram of FIG. The microcomputer 15 is a CPU (Central Processing Unit).
, Central processing unit) 15a and RAM (Random Access M)
emory) 15b and ROM (Read-Only Memory) 15c
It consists of and.

The motor 11 is connected to the CPU 15a via an output interface 15d and a driver 15e, and the open / close switch 13 and the first and second sensors 31a and 31b are connected via an input port 15f.
Are connected respectively. The RAM 15b is shown in FIG.
As shown in the memory area map, it has a data area for storing various data and a work area used for various processing operations. Among these, the work area includes a calculation, a first to fourth position counter, a one-side sensor failure diagnosis counter. (Hereinafter abbreviated as one-sided counter), first and second detection timing buffers, first and second cycle buffers, first and second speed buffers, first and second deceleration buffers, first
Each area of a fourth elapsed time measuring timer is provided. The ROM 15c stores a control program for causing the CPU 15a to perform various processing operations.

Next, the processing performed by the CPU 15a in accordance with the control program stored in the ROM 15c will be described with reference to the flow charts of FIGS. When the microcomputer 15 is activated and the program is started, the CPU 15a confirms whether or not the open / close switch 13 outputs one of the up request signal 13a and the down request signal 13b, as shown in FIG. If both signals are not output (N in step S1) (step S1), the output of the motor 11 up and down drive signals Ma and Mb to the driver 15e is stopped (step S3). Then, the count value Ca of the first position counter area of the RAM 15b is reset to zero (step S5), and the RAM 1
After the first elapsed time Tu, which is the elapsed time from the start of the output of the rise request signal 13a in the first elapsed time measurement timer area 5b, is stopped and reset to zero (step S7), the process proceeds to step S17.

When either one of the rising request signal 13a and the falling request signal 13b is output (Y in step S1), it is determined whether the output signal is the rising request signal 13a. Confirm (step S9), and if the rising request signal 13a (Y in step S9),
The measurement of the first elapsed time Tu is started in the first elapsed time measurement timer area (step S11). And
After outputting the ascending drive signal Ma for rotating the motor 11 in the ascending direction to close the window glass 51 to the driver 15e (step S13), the process proceeds to step S17. On the other hand, if it is not the rising request signal 13a (N in step S9), the lowering drive signal Mb for rotating the motor 11 in the lowering direction for opening the window glass 51 is output to the driver 15e (step S9).
15) and proceeds to step S17.

In step S17, it is confirmed whether or not the rising or falling edge of the first pulse signal Pa from the first sensor 31a is detected, and if it is detected (Y in step S17), a later-described first After performing the one-sensor pulse detection interrupt process (step S19), step S
21. If not detected (N in step S17), step S19 is skipped and the process proceeds to step S21.

[0022] In the first sensor pulse detection interrupt processing process in the step S19, as shown in FIG. 11, first, at step S19a, the time Ta _n which detects a rising or falling edge of the first pulse signal Pa , RAM1
Stored in the first detection timing buffer area 5b, the following step S19b, the in the second elapsed time measuring timer area RAM 15b, from the time Ta _n the following 1
The measurement of the second elapsed time Ta, which is the elapsed time until the time point Ta _{n + 1} at which the rising or falling edge of the pulse signal Pa is detected, is stopped and reset to zero. Further, in the second elapsed time measuring timer area to start measuring the second elapsed time Ta (step S19c), followed by first and second pulse signal Pa at the time Ta _n, the output level of Pb is equal to It is confirmed whether or not (step S19).
d).

When the output levels of the first and second pulse signals Pa and Pb are equal (Y in step S19d), RA
After incrementing the count value Ca of the first position counter area of M15b by "1" (step S19e), the process proceeds to step S19g, and when the output levels are not equal (N in step S19d), the count value Ca is "1". After decrementing (step S19f), the process proceeds to step S19g. In step S19g, RAM1
In the calculation area 5b, from the count value Ca of the first position counter area to the second value of the RAM 15b described later.
The difference value C is obtained by subtracting the count value Cb of the position counter area, and then the absolute value of this difference value C is the reference difference value N _DIFF.
Whether or not the above is confirmed (step S19h).

The count values Ca and Cb of the first and second position counter areas decrease when the window glass 51 rises in the closing direction, and conversely increase when the window glass 51 descends in the opening direction. To do. Then, each count value C
a and Cb are “0” when the window glass 51 is in the fully closed position, and are “N” when it is in the fully open position. Further, since the first and second pulse signals Pa and Pb are output once each by shifting the phase by 90 ° each time the motor 11 makes one rotation, the first and second sensors 31a and 31 are output.
As long as both b are operating normally, the absolute value of the difference value C is "0" or "1". Therefore, the reference difference value N
_{Although DIFF} may be set to "2", in the present embodiment, false first and second pulse signals Pa and Pb generated by noise are generated.
The reference difference value N _DIFF is set to “3” including a slight margin in consideration of the case of counting the rising edges of.

If the difference value C is not equal to or larger than the reference difference value N _DIFF (N in step S19h), step S1
9n, when the difference is equal to or greater than the reference difference value N _DIFF (Y in step S19h), the count value Ca is equal to the count value C.
It is confirmed whether it is larger than b (step S19).
j). When the count value Ca is larger than the count value Cb (Y in step S19j), the count value Ca is corrected to the same value as the count value Cb (step S19).
k), the process proceeds to step S19n, and when the count value Ca is not larger than the count value Cb (step S19j
N), the count value Cb is corrected to the same value as the count value Ca (step S19m), and then the process proceeds to step S19n.

In step S19n, the ascending drive signal Ma
Or confirm whether or not the descending drive signal Mb is output,
If not output (N in step S19n), FIG.
If the output has been made (Y in step S19n), then the first and second sensors 3
The count value Cc of the one-side counter area of the RAM 15b for confirming whether or not one of 1a and 31b is out of order is incremented by "1" (step S19).
p), the absolute value of the count value Cc is the abnormality determination reference value N
It is confirmed whether _ABNORM or more (step S19).
r).

The count value Cc of the one-sided counter area is incremented by "1" for each output of the first pulse signal Pa and, as will be described later, "1" for each output of the second pulse signal Pb. Decremented one by one. As shown in FIG. 4, the rising and falling edges of the first and second pulse signals Pa and Pb are alternated as long as the first and second sensors 31a and 31b are both operating normally. Occurs, and therefore the count value Cc
The absolute value of is "0" or "1". Moreover, the count value Cc is determined by the ascending drive signal Ma and the descending drive signal Mb.
When the output of is stopped, it is reset to zero. For this reason,
The abnormality determination reference value N _ABNORM may be set to "2", but in the present embodiment, the first and second sensors 31a, 31a, 31a, 31a,
The abnormality determination reference value N _ABNORM is set so that the entrapment detection processing operation is performed only when only one of the first and second pulse signals Pa and Pb from 31b is not continuously output. It is set to "10".

If the absolute value of the count value Cc is not greater than the abnormality determination reference value N _ABNORM (step S1)
9r, N), the process proceeds to step S21, and the abnormality determination reference value N
_{If ABNORM} or more (Y in step S19r), it is determined that one of the first and second sensors 31a and 31b has failed, and the process proceeds to position counter recovery processing (step S19t).

In this position counter restoration process, a flow chart is not shown, but it will be briefly described. By operating the opening / closing switch 13 in a predetermined pattern, the window glass 51 reaches the fully open or fully closed position, which will be described later. When it is detected that the fully open or fully closed position is reached by the same processing as steps S25 to S29 or steps S37 to S45 in the flowchart of FIG. 8, the detected position is the fully open position or the fully closed position. Depending on the position, the count values Ca and Cb in the first and second position counter areas are set to "N" or "0". When the position counter restoration process is completed, the process proceeds to step S21.

As shown in FIG. 7, in step S21,
It is confirmed whether the rising or falling edge of the second pulse signal Pb from the second sensor 31b is detected,
If detected (Y in step S21), after performing a second sensor pulse detection interrupt processing process described later (step S23), the process proceeds to step S25, and if not detected (N in step S21), Step S23 is skipped and the process proceeds to step S25.

In the second sensor pulse detection interrupt processing process of step S23, as shown in FIG. 12, first, the time point Tb _{n at} which the rising or falling edge of the second pulse signal Pb is detected in step S23a. , RAM1
5b is stored in the second detection timing buffer area, and in the subsequent step S23b, the second second from the time point Tb _n in the third elapsed time measuring timer area of the RAM 15b.
The measurement of the third elapsed time Tb, which is the elapsed time until the time point Tb _{n + 1} at which the rising or falling edge of the pulse signal Pb is detected, is stopped and reset to zero. Further, the measurement of the third elapsed time Tb is started in the third elapsed time measurement timer area (step S23c), and subsequently, the output levels of the first and second pulse signals Pa and Pb at the time Tb _n are different. It is confirmed whether or not (step S23d). When the output levels of the first and second pulse signals Pa and Pb are different (Y in step S23d), after incrementing the count value Cb of the second position counter area by "1" (step S23e), step S23g. , The output level is not different,
That is, if they are equal (N in step S23d), the count value Cb of the second position counter area is decremented by "1" (step S23f), and then the process proceeds to step S23g.

At step S23g, at step S1
Similar to 9g, in the calculation area, the difference value C is obtained by subtracting the count value Cb of the second position counter from the count value Ca of the first position counter area, and then the absolute value of this difference value C is the reference difference. It is confirmed whether or not the value is equal to or more than N _DIFF (step S23h). If it is not equal to or greater than the reference difference value N _DIFF (N in step S23h), step S
23n, if it is equal to or greater than the reference difference value N _DIFF (Y in step S23h), as in step S19j,
It is confirmed whether or not the count value Ca is larger than the count value Cb (step S23j). When the count value Ca is larger than the count value Cb (step S23j
Y), after correcting the count value Ca to the same value as the count value Cb (step S23k), the process proceeds to step S23n. If the count value Ca is not larger than the count value Cb (N in step S23j), the count value After correcting Cb to the same value as the count value Ca (step S23
m), and proceeds to step S23n.

In step S23n, the above step S1 is executed.
As with 9n, the ascending drive signal Ma or the descending drive signal Mb
Is output. If it is not output (N in step S23n), the process proceeds to step S25 in the flowchart of FIG. 7, and if it is output (step S23n).
n is Y), the count value Cc of the one side counter area is decremented by "1" (step S23p), and it is confirmed whether or not the absolute value of the count value Cc is not _less than the abnormality determination reference value N _ABNORM (step S23r). . Count value Cc
If the absolute value of is not _{equal to} or greater than the abnormality determination reference value N _ABNORM (N in step S23r), the process proceeds to step S25. If it is _{equal to} or greater than the abnormality determination reference value N _ABNORM (step S2
3r, N), and one of the first and second sensors 31a and 31b has failed, the position counter restoration process is performed (step S23t), and then the process proceeds to step S25.

As shown in FIG. 7, in step S25,
Check whether or not the descending drive signal Mb is output,
If not output (N in step S25), the process proceeds to step S37, and if output (step S25).
Y), it is confirmed whether or not the second elapsed time Ta of the second elapsed time measurement timer area is equal to or longer than the full-open / full-close confirmation time T _LOCK (0.5 sec = second in this embodiment) (step S27). ). If the second elapsed time Ta is not equal to or longer than the full-open / full-close confirmation time T _LOCK (N in step S27), the process returns to step S1, and if it is equal to or greater than the full-open full-close confirmation time T _LOCK (Y in step S27), It is confirmed whether or not the third elapsed time Tb of the third elapsed time measurement timer area is _{equal to} or longer than the fully open / closed confirmation time T _LOCK (step S).
29).

If the third elapsed time Tb is not longer than the full-open full-close confirmation time T _LOCK (N in step S29), the process returns to step S1. If it is the full-open full-close confirmation time T _LOCK or more (in step S29). Y), descending drive signal Mb
Output is stopped (step S31), and the count value Cc of the one-side counter area is reset to zero (step S31).
33), the lowering request signal 13b from the open / close switch 13
Is output (step S3)
5). If the descending request signal 13b is output (Y in step S35), step S is performed until it is no longer output.
35 is repeated, and if not output (N in step S35), the process returns to step S1.

At step S37, as shown in FIG.
It is confirmed whether the rising drive signal Ma is output,
If it is not outputting (N at step S37), it returns to step S1, and if it is outputting (step S37).
37), the process proceeds to step S39. In step S39, the count value Ca of the first position counter area is
It is confirmed whether the boundary value is N _DET or more. As shown in FIG. 13, the boundary value N _DET is the boundary position DL where there is no gap between the weather strip 53 of the door 5 and the window glass 51, that is, the upper end 51 of the window glass 51 at the fully closed position.
Corresponding to the correct count values Ca and Cb of the first and second position counter areas when the upper end 51a is located 13 mm below a at the same height as the outer lower end surface 53a of the weather strip 53. As a value, in this embodiment, the boundary value N _DET is set to “20”.

Therefore, the window glass 51 is provided in the fully closed region Sc above the boundary position DL where there is no possibility of entrapment of foreign matter.
If the upper end 51a of the
Since a and Cb are smaller than the boundary value N _DET , the upper end 51a of the window glass 51 is located at the boundary position DL where the foreign matter may be caught and the sandwiching detection area So (corresponding to a predetermined detection area) below the boundary position DL. If so, the count values Ca and Cb become the boundary value N _DET or more. And FIG.
If the count value Ca is not equal to or more than the boundary value N _DET (N in step S39), as shown in step S43,
If the count value Ca is greater than or equal to the boundary value N _DET (Y in step S39), the process proceeds to step S41.

In step S41, it is confirmed whether or not the count value Cb of the second position counter area is equal to or more than the boundary value N _DET . If it is equal to or more than the boundary value N _DET (Y in step S41). If it is not equal to or more than the boundary value N _DET (N in step S41), the process proceeds to step S43. In step S43, it is confirmed whether or not the second elapsed time Ta of the second elapsed time measuring timer area is _{equal to} or longer than the full-open / full-close confirmation time T _LOCK . When the second elapsed time Ta is fully opened not fully closed confirmation time T _LOCK more (N in step S43), and returns, when fully opened is fully closed confirmation time T _LOCK or to step S1 (Y in step S43), It is confirmed whether or not the third elapsed time Tb in the third elapsed time measurement timer area is _{equal to} or longer than the fully open / closed confirmation time T _LOCK (step S45).

[0039] The case third elapsed time Tb is fully opened not fully closed confirmation time T _LOCK more (N in step S45), the process returns to step S1, when fully opened is fully closed confirmation time T _LOCK further in (step S45 Y), rising drive signal Ma
Is stopped (step S47), and the count value Cc of the one-side counter area is reset to zero (step S47).
49), the lift request signal 13a from the open / close switch 13.
Is output (step S5)
1). If the rising request signal 13a is output (Y in step S51), step S is performed until it is no longer output.
If 51 is not repeated and is not output (N in step S51), the measurement of the first elapsed time Tu in the first elapsed time measurement timer area is stopped and reset to zero (step S53), and then step S1 is performed. To return.

If the count value Cb of the second position counter area is greater than or equal to the boundary value N _DET in step S41 (Y), the process proceeds to step S55 in which the second elapsed time measurement timer area The elapsed time Ta is the entrapment confirmation time T _E (0.1 sec = second in this embodiment).
Check if it is above. If the second elapsed time Ta is not longer than the entrapment confirmation time T _E (step S5
5, N), the process proceeds to step S59, and the entrapment confirmation time T
_{If E} or more (Y in step S55), the third
It is confirmed whether or not the third elapsed time Tb in the elapsed time measurement timer area is equal to or longer than the entrapment confirmation time T _E (step S57). If the third elapsed time Tb is not longer than the entrapment confirmation time T _E (N in step S57), the process proceeds to step S59, and if it is greater than or equal to the entrapment confirmation time T _E (Y in step S57), the process proceeds to step S97.

In step S55 or step S57, if the second or third elapsed time Ta or Tb in the second or third elapsed time measuring timer area is not continuous for the entrapment confirmation time T _E or more, the process proceeds to (N). In step S59, the first elapsed time Tu of the first elapsed time measurement timer area is set.
Is 200 ms (milliseconds) or more, that is, 200 ms or more has elapsed from the start of output of the increase request signal 13a in step S5. If the first elapsed time Tu is not 200 ms or more (N in step S59), the process returns to step S1 and 200
If ms or more (Y in step S59), step S
Proceed to 61.

At step S61, as shown in FIG.
Said first detection timing the first pulse signal Pa stored in the buffer area, recently and its two before the rising or falling edge detection time Ta _n, the time difference Ta _n-2, i.e., the first pulse signal Pa cycle Wa _n of, determined in the calculation area, then after storing the cycle Wa _n determined in the first cycle buffer area of RAM 15b (step S63), this cycle Wa _n is the reference period W _REF
It is confirmed whether or not (30 ms = millisecond in the present embodiment) or more (step S65).

If the period Wa _n is not equal to or longer than the reference period W _REF (N in step S65), the process proceeds to step S73. If it is equal to or greater than the reference period W _REF (Y in step S65), the second detection timing buffer is used. Calculate the time difference between the most recent and the preceding rising or falling edge detection times Tb _n and Tb _n-2 of the stored second pulse signal Pb, that is, the period Wb _n of the second pulse signal Pb. Obtained in the area (step S67). And
The obtained cycle Wb _n is stored in the second cycle buffer area of the RAM 15b (step S69), and then it is confirmed whether this cycle Wb _n is the reference cycle W _REF or more (step S71). The cycle Wb _n is the reference cycle W
If it is not more than _REF (N in step S71), the process proceeds to step S73, and if it is not less than the reference period W _REF (Y in step S71), the process proceeds to step S97.

In step S65 or step S71, the
Period Wa of the first or second pulse signal Pa, Pb_n, Wb_n
Is the reference period W_REFIf not, go to (N)
In S73, the window window per pulse of the first pulse signal Pa is
The amount of elevation of the lath 51, that is, the power Loose resolution Sa (this embodiment
0.65 mm), and twice the first pulse signal Pa
Period Wa_nLifting speed Va of the window glass 51 divided by_nTo
Calculated in the calculation area, and then the calculated ascending / descending speed V
a_nIs stored in the first speed buffer area of the RAM 15b.
(Step S75). And in the calculation area,
Previous lifting speed Va of the first speed buffer area_n-1
The lifting speed Va_nThe differential speed (Va_n-V
a_n-1) Is the period Wa of the first period buffer area_n
Deceleration Aa of the window glass 51_n(Step
S77), this deceleration Aa_nThe first reduction of RAM15b
After storing in the speed buffer area (step S79),
Deceleration Aa_nIs a threshold for sudden deceleration that is not normally possible
A_HI(In the present embodiment, 3500 mm / sec 2 = millisecond 2
 ) It is confirmed whether or not the above (step S81).

If the deceleration Aa _n is not equal to or greater than the threshold value A _HI (N in step S81), the process proceeds to step S93, and if it is equal to or greater than the threshold value A _HI (Y in step S81), one pulse of the second pulse signal Pb is obtained. Amount of elevation of the window glass 51 per hit, that is, pulse resolution Sb (= Sa, 0.65 in this embodiment).
mm) is divided by the period Wb _n of the second pulse signal Pb to obtain the ascending / descending speed Vb _n of the window glass 51 in the calculation area (step S83).
b _n is stored in the second speed buffer area of the RAM 15b (step S85). And in the calculation area,
The previous lifting speed Vb _{n-1 of} the second speed buffer area
Is subtracted from the ascending / descending speed Vb _n (Vb _n −V
b _n-1 ) is the period Wb _n of the second period buffer area
Then, the deceleration Ab _n of the window glass 51 is obtained (step S87), and the deceleration Ab _n is stored in the second deceleration buffer area of the RAM 15b (step S89).
It is confirmed whether or not the deceleration Ab _n is _equal to or more than the threshold value A _HI (step S91).

If the deceleration Ab _n is greater than or equal to the threshold value A _HI (Y in step S91), the process proceeds to step S97. If it is not greater than or equal to the threshold value A _HI (N in step S91), the process proceeds to step S93. In step S93, as shown in FIG. 10, the first speed of the buffer area for the past predetermined number X min deceleration _{Aa n ~Aa n- (X-1} ) is continuously, the gradual deceleration threshold A _LO If not sure whether it is more (90 mm / sec ² = ms ² in this embodiment), greater than or equal to the threshold value a _LO continuously for a predetermined number of times X (step S93
N), the process returns to step S1. If the threshold value A _{LO is not} less than the predetermined number of times X continuously (Y in step S93), the process proceeds to step S95. In the present embodiment, the predetermined number of times X is 6 times.

In step S95, decelerations Ab _{n to} Ab _{n for the} predetermined number of past times X in the second speed buffer area.
_{n- (X-1)} is continuously checks whether equal to or greater than a threshold value A _LO of the deceleration, if not greater than or equal to the threshold value A _LO consecutively a predetermined number of times X (N in step S95 ), The process returns to step S1, and if the threshold value A _{LO is not} less than the predetermined number of times X consecutively (Y in step S95), step S1.
Proceed to 97. In step S97, the descending drive signal Mb is output to the driver 15e, and then the fourth signal of the RAM 15b is output.
In step S9 in the elapsed time measuring timer area,
The measurement of the fourth elapsed time Ts, which is the elapsed time from the start of the output of the descending drive signal Mb in 7, is started (step S9).
9). Next, the count value Ca of the first position counter area is set as the count value Cd of the third position counter area of the RAM 15b (step S101), and further, R
Count value Cd of the fourth position counter area of AM15b
As, the count value Cb of the second position counter area is set (step S103).

Next, the count value Cd of the third position counter area is subtracted from the count value Ca of the first position counter area, and the increase value Cf of the count value Ca after the downward drive signal Mb is output in step S97. It is calculated in the calculation area (step S105). Then, it is confirmed whether or not the increase value Cf has reached a predetermined pinch release driving value Nr (230 in this embodiment) (step S10).
7) If it has reached (Y in step S107), the process proceeds to step S109, and if it has not reached (N in step S107), the process proceeds to step S113.

In step S109, the count value Ce of the fourth position counter area is subtracted from the count value Cb of the second position counter area, and the increase value Cg of the count value Cb after the descending drive signal Mb is output in step S97. Is calculated in the calculation area. Then, it is confirmed whether or not the increase value Cg has reached the entrapment release driving value Nr (step S111), and if it has reached (Y in step S111), the process proceeds to step S115, and if it has not reached ( N in step S111), step S11
Go to 3.

In step S113, it is confirmed whether or not the fourth elapsed time Ts has continued for the full-open / full-closed confirmation time T _LOCK or more, and if it has not continued (step S11).
3), the process returns to step S105, and if continuous (Y in step S113), step S115.
Proceed to. In step S115, the output of the descending drive signal Mb is stopped, and then the measurement of the fourth elapsed time Ts in the fourth elapsed time measuring timer area is stopped and reset to zero (step S117). The count value Cc is reset to zero (step S119),
Further, the open / close switch 13 outputs a rising request signal 13a.
Is output (step S12).
1). If the rise request signal 13a is output (Y in step S121), step S121 is repeated until it is no longer output, and if it is not output (N in step S121), the first elapsed time measurement timer area After the measurement of the first elapsed time Tu is stopped and the zero is reset (step S123), the process returns to step S1.

As is clear from the above description, in the present embodiment, the position counter means 15A ₁ to 15A in claim 1 are described.
_An is step S1 in the flowchart of FIG.
01 to step S105 and step S109
And step S19e in the flowchart of FIG.
10 and step S19f, and steps S23e and S23f in the flowchart of FIG. 12, and the opening / closing position determination unit 15B includes steps S39 and S41 in the flowchart of FIG.
It is composed of steps S107 and S111. Further, in the present embodiment, the rotation direction detecting means 15C in claim 2 has the same function as the step S19d in FIG.
Comparing means 15D in claim 3 comprises steps S19g to S19j in FIG. 11 and steps S23g to S23j in FIG. 12, and the count value correcting means 15E comprises steps It is composed of S19k and step S19m, and step S23k and step S23m in FIG.

Further, in the present embodiment, the pulse non-state detecting means 15F in claim 4 has step S31 in the flowchart of FIG. 7, step S49 in FIG. 8, step S119 in FIG. 10, and FIG. Step S1 in
9n to step S19r and step S2 in FIG.
3n to step S23r, and the second count value correction means 15G includes the step S19t in FIG.
It is composed of step S23t in 2. Further, in this embodiment, the detection area discrimination means 15H in claim 5 is constituted by steps S39 and S41 in FIG.
The entrapment detection means 15J includes steps S55 to S59 in FIG. 8, steps S61 to S91 in FIG. 9, and steps S93 and S95 in FIG.

Next, the operation (action) of the power window of this embodiment having the above-mentioned structure will be described. First, when the open / close switch 13 is tilted backward, the open / close switch 13 outputs the descending request signal 13b, and the descending drive signal Mb input to the driver 15e accordingly causes
The motor 1 is moved in the direction in which the window glass 51 is lowered toward the fully open position.
1 rotates. Then, each time the motor 11 rotates once, the second sensor 31b outputs the second pulse signal Pb once, and the first sensor 31a is delayed by a phase of 90 ° from the second pulse signal Pb. The first pulse signal Pa is output once.

When the window glass 51 reaches the fully open position and the rotation of the motor 11 stops, the first and second sensors 31a and 31b stop outputting the first and second pulse signals Pa and Pb, respectively. When the state continues and both the second and third elapsed times Ta and Tb reach the full-open / full-close confirmation time T _LOCK , the driver 15e is driven downward even if the open / close switch 13 is continuously tilted backward. Signal M
The input of b is stopped. Here, the rearward tilting operation of the open / close switch 13 is temporarily released, and then the open / close switch 1
When 3 is tilted rearward again, the descending drive signal Mb is re-input to the driver 15e, but the window glass 51 does not move at the fully open position and the motor 11 does not rotate. 1st and 2nd pulse signal P
Since a and Pb are not output respectively, therefore, the input of the descending drive signal Mb to the driver 15e is stopped again after the elapse of the full-open / full-close confirmation time T _LOCK .

When the motor 11 rotates in the direction in which the window glass 51 is lowered toward the fully open position, the first sensor 31a
The signal levels of the first and second pulse signals Pa and Pb coincide with each other at the rising and falling edges of the first pulse signal Pa output by the. Therefore, the count value Ca of the first position counter area that counts the open / closed position of the glass window as the window glass 51 descends toward the fully open position is
It is incremented by "1" for each output of the first pulse signal Pa, and similarly, the count value Cb of the second position counter area is incremented by "1" for each output of the second pulse signal Pb. Then, unless the first and second pulse signals respectively generate false pulses due to output abnormality or noise, when the window glass 51 reaches the fully open position, the count values Ca of the first and second position counter areas, Cb
Are both "N".

On the other hand, when the open / close switch 13 is tilted forward, the open / close switch 13 outputs a lift request signal 13a, and the lift drive signal Ma input to the driver 15e accordingly causes the window glass 51 to move to the fully closed position. The motor 11 rotates in the direction of raising it to the side. Then, the motor 1
The first sensor 31a outputs the first pulse signal Pa once each time 1 rotates once, and the second sensor 31b delays the second pulse by a phase delay of 90 ° from the first pulse signal Pa. The signal Pb is output once.

When the window glass 51 reaches the fully closed position and the rotation of the motor 11 stops, the first and second sensors 31a and 31b stop outputting the first and second pulse signals Pa and Pb, respectively. When this state continues and both the second and third elapsed times Ta and Tb reach the full-open / full-close confirmation time T _LOCK , even if the forward tilting operation of the open / close switch 13 is continued, the driver 15e is raised. Drive signal M
The input of a is stopped. Here, the rearward tilting operation of the open / close switch 13 is temporarily released, and then the open / close switch 1
When 3 is tilted rearward again, the descending drive signal Mb is re-input to the driver 15e, but the window glass 51 does not move at the fully open position and the motor 11 does not rotate. 1st and 2nd pulse signal P
Since a and Pb are not output respectively, therefore, the input of the descending drive signal Mb to the driver 15e is stopped again after the elapse of the full-open / full-close confirmation time T _LOCK .

When the motor 11 is rotated in the direction of raising the window glass 51 to the fully closed position side, the first and second pulse signals Pa and Pb are changed at the rising and falling points of the first pulse signal Pa. The signal levels do not match.
Therefore, as the window glass 51 rises toward the fully closed position, the count value Ca of the first position counter area
Is decremented by "1" for each output of the first pulse signal Pa, and similarly, the count value Cb of the second position counter area is decremented by "1" for each output of the second pulse signal Pb. As long as there is no false pulse due to output abnormality or noise in the first and second pulse signals, the count value Ca of the first and second position counter areas is reached when the window glass 51 reaches the fully closed position. , Cb
Are both "0".

In addition, the generation of the false pulse due to the abnormal output and the noise as described above exists in the first and second pulse signals,
As a result, when the count values Ca and Cb of the first and second position counter areas are in a normal state, when the deviation becomes "3", the count value C
Of a and Cb, the count value with the larger value is corrected to the count value with the smaller value.

Further, the tilting operation of the open / close switch 13 causes the motor 11 to rotate, and the first and second motors are accordingly rotated.
The sensors 31a and 31b have the first and second pulse signals Pa,
When each Pb is output, regardless of the rotation direction,
The count value Cc of the one-sided counter for detecting that one of the first and second sensors 31a and 31b is out of order is incremented by "1" when the first pulse signal Pa is output, and , Is decremented by "1" when the second pulse signal Pb is output.

Then, during one tilting operation of the open / close switch 13, the first and second pulse signals Pa, Pa, due to the failure of either one of the first and second sensors 31a, 31b.
When only one of Pb is output and the other is not output at all, if this phenomenon continues for 10 pulses, the position counter restoration processing is performed, and thereby,
When the window glass 51 reaches the fully open or fully closed position, the count values Ca and Cb in the first and second position counter areas become "N" when the fully open position and "0" when the fully closed position. Each is corrected.

Next, with the upper end 51a of the window glass 51 positioned at the boundary position DL and the pinch detection area So below the boundary position DL, the window switch 51 is raised to the driver 15e when the opening / closing switch 13 is tilted forward. When the drive signal Ma is input, the motor 11 rotating in a direction of raising the window glass 51 to the fully closed position side causes the window frame of the door 5 and the window glass 5 to rotate.
When stopped by the foreign matter sandwiched between the first and second sensors, the first and second sensors 31a and 31b are stopped by the first and second pulse signals P.
A and Pb are not output respectively. In this case, the counter values Ca and Cb in the first and second counter areas
_Are both above the boundary value N _DET , the state of no output of the first and second pulse signals Pa and Pb continues,
The second and third elapsed times Ta, T which are the elapsed times
When both b reach the entrapment confirmation time T _E , the entrapment release operation described below is performed.

In the pinch releasing operation, the open / close switch 13
Even if the forward tilting operation of the driver is continued, the input of the ascending drive signal Ma to the driver 15e is stopped, then the descending drive signal Mb is input to the driver 15e, and the window glass 51
The motor 11 rotates in the direction of lowering the to the fully open position side. Then, after the increase amounts of the counter values Ca and Cb in the first and second counter areas from the start of the input of the down drive signal Mb to the driver 15e both reach the entrapment release specified value Nr, the down drive signal Mb driver 1
The input to 5e is stopped, and the rotation of the motor 11 is stopped. As a result, a sufficient amount (in the present embodiment, the first and second pulse signals Pa, Pa,
Pb pulse resolution Sa, Sb x entrapment release specified value N
The window glass 51 descends by r = 0.65 mm × 230 = approximately 15 cm).

It should be noted that, from the start of the input of the descending drive signal Mb to the driver 15e, until the amount of increase in the counter values Ca and Cb in the first and second counter areas reaches the entrapment release specified value Nr. When the window glass 51 reaches the fully opened position and the rotation of the motor 11 stops,
The input of the rising drive signal Ma to the driver 15e is stopped by the same operation as when opening the normal window glass 51.

In this way, the window frame of the door 5 and the window glass 51 are
When the rotation of the motor 11 is stopped due to the foreign matter sandwiched between the two, the pinching release operation is performed according to the length of the stop time. However, just because a foreign object is caught between the window frame of the door 5 and the window glass 51 does not always stop the rotation of the motor 11, and depending on the hardness of the caught foreign object, the motor 11 does not stop and rotates. It may continue to do so.
Therefore, the upper end 51a of the window glass 51 is located at the boundary position DL and the sandwiching detection area So below the boundary position DL, and the counter values Ca and Cb of the first and second counter areas are provided.
_Are both above the boundary value N _DET , the periods Wa _n and Wb _{n of} the first and second pulse signals Pa and Pb are not limited to when the rotation of the motor 11 is stopped due to the entrapment of foreign matter. , Deceleration Aa _n , Ab _{n of} the motor 11
Depending on the value of, the pinch release operation is performed.

First, the rotation of the motor 11 becomes considerably slow, and both the cycles Wa _n and Wb _n are the reference cycle W _REF.
In the case of the above, the pinching operation is performed. Next, even if at least one of the cycles Wa _n and Wb _n is less than the reference cycle W _REF , the deceleration Aa _n and Ab
_n is far from the deceleration when the motor 11 is decelerated due to the squeak of the glass window 51 with respect to the window frame of the door 5 or the contact of the hand or body with the glass window 51. When the speed threshold value is equal to or higher than the threshold value A _HI , the pinching operation is performed. Furthermore, at least one of the cycles Wa _n and Wb _n is less than the reference cycle W _REF , and
Even if at least one of the decelerations Aa _n and Ab _n does not _{reach the} threshold value A _HI , the deceleration Aa _{n for the} past predetermined number of times X
~Aa _{n- (X-1),} both _{Ab n ~Ab n- (X-1} ) is continuously, if it becomes more than the threshold value A _LO loose deceleration, performs the pinching operation.

Incidentally, the cycles Wa _n , Wb _n and the deceleration Aa
Whether to perform the pinch release operation based on the values of _n and Ab _n is
The rotation speed of the motor 11, and by extension, the cycles Wa _n , W
In order to stabilize the values of b _n and decelerations Aa _n and Ab _n ,
This is performed after waiting for 200 ms from the start of output of the rising request signal 13a due to the forward tilting operation of the open / close switch 13. In addition, the upper end 51a of the window glass 51 is located in the fully closed region Sc above the boundary position DL, and the outer lower end surface 53a of the weather strip 53 and the window glass 5 are located.
When there is no gap between the upper ends 51a of the first and second counters, the counter values Ca and Cb of the first and second counter areas are both smaller than the boundary value N _DET , and thus the foreign matter entrapment detection operation described above is performed. Does not. Further, when the window glass 51 descends, there is no risk of being caught between the window frame of the door 5 and the window glass 51 even if there is a foreign matter, and thus the foreign matter trapping detection operation is not performed in this case as well.

As described above, according to the window glass opening / closing position detecting apparatus of the present embodiment, in synchronization with the rotation of the motor 11,
First and second two sensors 31 of the pulse generator 31
The pulse signals Pa and Pb are output from a and 31b once per revolution, and the number of pulses of each pulse signal Pa and Pb is individually output in the first and second position counter areas according to the rotation direction of the motor 11. Up-down counting is performed, and the open / close position of the window glass 51 is determined based on the respective count values Ca and Cb. Therefore, one of the first and second sensors 31a and 31b fails and the pulse signal P
a or Pb is not output, or pulse signal P
For example, even if one of a and Pb fails to count in the first and second position counter areas, and the count value Ca in the first position counter area is incorrect, the second position counter area is normal. Since the open / close position of the window glass 51 is determined in consideration of the count value Cb, it is possible to prevent the determined open / close position from largely deviating from the actual position.

Further, according to this embodiment, when the difference value C between the count values Ca and Cb of the first and second position counter areas becomes equal to or _larger than the reference difference value N _DIFF , both count values Ca,
Since the larger value of Cb is corrected so as to match the smaller value, as described above, due to the output leakage of the pulse signals Pa and Pb and the count leakage, the first and second position counter areas are Even if there is a difference between the count values Ca and Cb, the difference does not become large, so that the reliability of both count values Ca and Cb is prevented from being greatly impaired, and the judgment is made from both count values Ca and Cb. It is possible to prevent the open / close position from largely deviating from the actual position.

Further, according to the present embodiment, during one operation of the open / close switch 13, either one of the pulse signals Pa and Pb is not continuously output, and the absolute value of the count value Cc of the one side counter area is determined. When the value becomes _{equal to} or greater than the abnormality determination reference value N _ABNORM , the position counter restoration process is started, and when the window glass 51 is opened and closed to the fully open or fully closed position, the reached position is the fully open position or the fully closed position. Depending on whether or not the count value C of the first and second position counter areas
The configuration is such that a and Cb are reset to "N" or "0". Therefore, even if there is a difference between the count values Ca and Cb of the first and second position counter areas due to the output leakage of the pulse signals Pa and Pb and the count leakage, the count value Ca, before the difference becomes large, Resetting Cb to a correct value to prevent the reliability of both count values Ca and Cb from being greatly impaired, and to prevent the open / close position determined from both count values Ca and Cb from deviating significantly from the actual position. You can

Further, according to this embodiment, the boundary position DL where the gap between the weather strip 53 of the door 5 and the window glass 51 is eliminated, that is, the same height as the outer lower end surface 53a of the weather strip 53, and Whether the upper end 51a of the window glass 51 is located in the pinch detection area So on the fully open position side, whether the count values Ca and Cb of the first and second position counter areas are both the boundary position D
The configuration is such that it is determined whether or not the boundary value N _DET corresponding to the correct count values Ca and Cb when the upper end 51a is located at L is greater than or equal to the boundary value N _DET . Then, when it is determined that the upper end 51a of the window glass 51 is located in the entrapment detection area So, it is determined whether or not a foreign object is entrapped by the window glass 51 at the time of edge detection of the latest pulse signals Pa and Pb. Elapsed time Ta, Tb, pulse signals Pa, P
The detection is made based on the cycles Wa _n and Wb _{n of} b and the decelerations Aa _n and Ab _n of the window glass 51.

For this reason, there is a possibility that foreign matter may be caught between the window frame of the door 5 and the window glass 51.
Whether or not there is an upper edge of the window glass 51 can be detected with high reliability based on the count values Ca and Cb of the first and second position counter areas, and a foreign substance can be sandwiched between the window frame and the window glass 51. In the totally closed region Sc having no property, the window glass 51
It is possible to avoid wastefully detecting whether or not there is a foreign object being pinched.

When the difference between the count values Ca and Cb in the first and second position counter areas exceeds the reference difference value N _DIFF , the correction of both count values Ca and Cb is performed. The smaller value of Cb may be the same as the larger value, or the correction itself may not be performed. However, as in the present embodiment, if the larger of the count values Ca and Cb is corrected so as to match the smaller one of the count values Ca and Cb, the pinch on the boundary position DL and the fully open position side than this is detected. When detecting the presence or absence of a foreign substance trapped in the detection area So, the position of the upper end 51a of the window glass 51 when the corrected count values Ca and Cb coincide with the boundary value N _DET is set to be more than the boundary position DL. It will not shift to the closed position side. Therefore, after the count values Ca and Cb are corrected, it is erroneously determined that the foreign matter is caught when the window glass 51 reaches the fully closed position and stops, and the window glass 51 is forcibly opened and cannot be closed. This is advantageous because it can be prevented from occurring.

Further, the first and second sensors 31a, 31b
The phase difference between the pulse signals Pa and Pb output by
Although it may have a phase other than ° or the same phase, as in the present embodiment, the first and second sensors 31a and 31b are shifted in phase from each other by 90 degrees to generate the pulse signals Pa and Pb, respectively. If it is configured to output, there are the following advantages. That is, due to the coincidence and non-coincidence of the signal levels of the pulse signals Pa and Pb at the rising and falling points of the pulse signal Pa, the motor 11 descends the window glass 51 toward the fully open position and the window glass 51 is completely closed. It is possible to detect which of the directions of rising to the position side is rotating.

Therefore, for example, due to inertia of the motor 11 after the operation of the open / close switch 13 is stopped, backlash of a gear train (not shown) constituting a power transmission system between the motor 11 and the window glass 51, or the like. Even when the motor 11 is rotated even though the open / close switch 13 is not operated, the rotation direction of the motor 11 at that time is set to the open / close switch 1
3 can be detected reliably regardless of the operation state. However, a plurality of pulse signals P _{1 to} P _n that are out of phase with each other in this way
It is of course that whether or not the rotation direction of the motor 11 is detected is arbitrary, and the rotation direction of the motor 11 may be detected by the operation of the opening / closing switch 13 or other means. The configuration corresponding to the rotation direction detecting means 15C may be omitted.

Further, in this embodiment, the pulse signal output means 31 _{1 to} 31 _n are constituted by the first and second sensors 31a and 31b which output the pulse signals Pa and Pb in synchronization with the rotation of the motor 11. However, the number of pulse signal output means 31 _{1 to} 31 _n may be three or more, and the number of position counter means 15A _{1 to} 15A _n also corresponds to the number of pulse signal output means 31 _{1 to} 31 _n. Can be changed arbitrarily. Further, in this embodiment, one operation of the open / close switch 13 continuously outputs only one of the first and second pulse signals Pa and Pb from the first and second sensors 31a and 31b. If the window glass 51 reaches the fully closed or fully open position or the fully closed position through the position counter recovery process, the first and second positions are determined according to whether the reached position is the fully open position or the fully closed position. The count values Ca and Cb in the position counter area are set to "N" or "0".

Therefore, the first and second two sensors 3
One of 1a and 31b has a pulse signal P due to a failure or the like.
When a and Pb are no longer output, the first and second
The reliability of the count values Ca and Cb in the position counter area can be restored. However, when one of the first and second sensors 31a and 31b stops outputting the pulse signals Pa and Pb due to a failure or the like, the first sensor
It is arbitrary whether or not the count values Ca and Cb of the second position counter area are corrected as described above, and the configurations corresponding to the pulse non-state detecting means 15F and the second count value correcting means 15G may be omitted. Good.

Further, in this embodiment, the pulse signals Pa,
Although the configuration is such that the rising and falling edges of Pb are detected, the configuration for detecting the pulse signals Pa and Pb, such as the configuration in which only one of the rising and the falling is detected, is shown in this embodiment. It is not limited to the configuration and is arbitrary. Further, the present invention is not limited to the window glass 51 of the door 5 on the side of the vehicle as shown in the present embodiment, but the window glass of the rear door or the like is opened / closed in the power window opened / closed by the motor. It goes without saying that it can be widely applied to the case of detecting the position.

[0079]

As described above, according to the present invention, there is provided a power window window opening / closing position detecting device for opening / closing a window glass by a motor, and a plurality of sets for outputting pulse signals in synchronization with the rotation of the motor. Pulse signal output means, and the number of output pulses of each pulse signal is up-down counted according to the rotation direction of the motor,
A configuration is provided in which the number of sets of position counter means corresponding to each of the pulse signal output means and the open / closed position determination means for determining the open / closed position of the window glass based on the count value of each of the position counter means are provided. Therefore, the count value of the position counter means is partly incorrect due to the output leakage of the pulse signal from some of the pulse signal output means, the omission of the number of pulses of the pulse signal from some of the position counter means, and the like. Also, by other normal count value of the position counter means,
The opening / closing position of the window glass judged by the opening / closing position judging means can be prevented from largely deviating from the actual opening / closing position.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a window glass opening / closing position detection device for a power window according to the present invention.

FIG. 2 is an explanatory diagram showing, in a partial block diagram, a schematic configuration of a power window including a window glass opening / closing position detection device according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of the pulse signal generator of FIG.

FIG. 4 is an explanatory diagram of pulse signals output by the first and second sensors of the pulse signal generator of FIG.

5 is a block diagram showing a hardware configuration of the microcomputer shown in FIG.

FIG. 6 is a memory area map of the RAM of the microcomputer shown in FIG.

7 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer shown in FIG.

8 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer shown in FIG.

9 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer shown in FIG.

10 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer shown in FIG.

11 is a flowchart showing a subroutine of first sensor pulse detection interrupt processing shown in FIG. 7. FIG.

FIG. 12 is a flowchart showing a subroutine of first sensor pulse detection interrupt processing shown in FIG. 7.

FIG. 13 is an explanatory diagram showing a boundary position between a fully closed area and an entrapment detection area of the window glass shown in FIG.

[Explanation of symbols]

11 Motor 15 Microcomputer 15a CPU 15b RAM 15c ROM 15A _{1 to} 15A _n Position Counter Means 15B Opening / Closing Position Determining Means 15C Rotation Direction Detecting Means 15D Comparing Means 15E Count Value Correcting Means 15F Pulse No State Detecting Means 15G Second Counting Value Correcting Means 15H Detection area discrimination means 15J Entrapment detection means 31 _{1 to} 31 _n pulse signal output means 51 Window glass C _{1 to} C _n count value P _{1 to} P _n pulse signal

Front page continuation (72) Inventor Takeshi Omiyama 3-5-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Tadashi Izumi, 206-1 Nunobikihara, Haibara-cho, Harahara-gun, Shizuoka Prefecture Parts Yazaki Within the corporation

Claims (5)

[Claims] 1. A power window window opening / closing position detecting device for opening / closing a window glass by a motor, comprising a plurality of sets of pulse signal output means for outputting a pulse signal synchronized with the rotation of the motor, and each of the pulse signals. The number of output pulses of each of them is up-down counted according to the rotation direction of the motor, and the position counter means of the number of sets corresponding to each pulse signal output means, and the window glass based on the count value of each position counter means An opening / closing position determination device for determining the opening / closing position of the power window, and an opening / closing position detection device for a power window. 2. The plurality of sets of pulse signal output means are configured to output the pulse signals with their phases shifted by a predetermined angle from each other, and output the pulse signals from the plurality of sets of pulse signal output means. Rotation direction detecting means for detecting the rotation direction of the motor based on the rotation direction detecting means is further provided, and each position counter means determines the number of output pulses of each pulse signal according to the rotation direction of the motor detected by the rotation direction detecting means. The window glass opening / closing position detecting device for a power window according to claim 1, which counts up / down. 3. A comparing means for comparing the count values of the respective position counter means with each other, and a count value of the position counter means having the smallest count value among the position counter means according to a comparison result of the comparing means. To match
3. A window glass opening / closing position detecting device for a power window according to claim 1, further comprising count value correcting means for correcting the count value of another position counter means. 4. A pulse non-state detecting means for detecting a non-output state of the pulse signal from a part of the pulse signal outputting means of the plurality of sets of pulse signal outputting means, and a detection result of the pulse non-state detecting means. The window glass open / closed position detection device for the power window according to claim 1, 2 or 3, further comprising a second count value correction means for correcting the count value of each position counter means according to the above. 5. A detection area discriminating means for discriminating whether or not the count value of each of the position counter means is a value corresponding to a range of a predetermined detection area for detecting the presence or absence of a foreign substance sandwiched by the window glass. The window opening / closing position of the power window according to claim 1, 2, 3 or 4, further comprising: an entrapment detection unit that detects the presence or absence of an entrapment of a foreign substance by the window glass according to the determination result of the detection area determination unit. Detection device.