JPH08199906A - Entrapment detection device for power windows - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to accurately detect the entrapment of foreign matter even if the pulse signal interval is distorted due to noise in the pulse signal according to the rotation of the motor, output or omission of detection. To do so. A device for detecting entrapment of a foreign object in a power window that opens and closes a window glass 51 by a motor 11, which is a pulse signal P ₁ -S synchronized with the rotation of the motor 11.
A plurality of sets of pulse signal output means 31 _{1 to} 3 for outputting P _n
And 1 _n, wherein the opening and closing state of the window glass 51 based on the pulse signals P ₁ to P _n, the pulse signal output means 31 ₁ -
The opening / closing state indexing means 15A for indexing the same number of patterns as 31 _n is provided, and the presence or absence of a foreign object is detected based on the open / closed states of the plurality of patterns of the window glass 51 indexed by the opening / closing state indexing means 15A.

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 that a window glass has caught a foreign object in a power window of an automobile.

[0002]

2. Description of the Related Art Generally, as represented by a passenger car, a power window is widely used in automobiles, which automatically opens and closes a window glass such as a door window by driving a motor according to a switch operation. Then, a pinch detection device for detecting whether or not a foreign object such as an article or a part of the body is pinched between the door frame and the window glass is being attached to the power window.

One of the conventional examples of such an entrapment detection device
One example is a power window safety device disclosed in Japanese Patent Laid-Open No. 5-321530. 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 are different by 90 ° with the rotation of the motor, and the interval time of the pulse signals from the Hall elements is detected. The relative speed of opening and closing the window glass is determined from the absolute speed of opening and closing of the window glass from the above, and it is determined that a foreign object is sandwiched when the absolute speed is slower than the reference speed, and from the front-back ratio of the interval time of the pulse signal. Is determined, and it is determined that the foreign matter is trapped when the relative speed is greatly reduced below a predetermined rate.

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 the window glass opening and closing device, the ripple current of the motor for driving the window glass opening and closing is waveform-shaped to generate a motor pulse signal according to the rotation speed of the motor. It is detecting.

More specifically, in the second embodiment, the cycle Tp of the motor pulse signal during the opening / closing of the window glass is explained.
The frequency f of the motor pulse signal is obtained from the above, and when the window glass is outside the vicinity of the fully closed position, that is, when the window glass is in a position where foreign matter may be caught, the frequency f is set to a predetermined set frequency f. _{When it is} equal to or lower than _H (f _H ≧ f), it is determined that the foreign matter is sandwiched. In the windowpane opening / closing device, when the frequency f exceeds a high set frequency f ₀ that does not occur at a normal motor rotation speed (f> f ₀ ), it is calculated from the number of pulses of the motor pulse signal. Even if the position of the window glass is a position where foreign matter may be caught, the detection operation is canceled because the motor pulse signal contains noise.

[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. When signal detection omission occurs, the interval time of the pulse signal becomes incorrect, and the absolute speed or relative speed of opening and closing of the window glass calculated from the interval time deviates from the actual speed, and foreign matter is erroneously pinched. There is a problem in that there is a possibility that it will be detected and the release operation will be performed unnecessarily. Further, although the window glass opening / closing device can detect the presence / absence of noise in the motor pulse signal based on the frequency f of the motor pulse signal, the noise is erroneously detected as a pulse and foreign matter is caught. Since it is not possible to detect whether or not the detection is affected, it is possible to erroneously detect the trapping of a foreign object and perform the releasing operation unnecessarily, as in the case of the power window safety device. There was a problem that there was a property.

The present invention has been made in view of the above circumstances, and an object of the present invention is to detect the presence / absence of a foreign substance caught in a window glass of a power window based on a pulse signal corresponding to the rotation of a motor. Provided is a window detector for detecting the opening / closing position of a power window, which can accurately detect the entrapment of a foreign matter even if the pulse signal interval or the pulse signal output is missed due to noise in the pulse signal or the pulse signal output or detection omission. To do.

[0008]

In order to achieve the above object, the present invention is directed to a motor 11 as shown in FIG.
A device for detecting the entrapment of foreign matter in the power window for opening and closing the window glass 51 by means of a plurality of sets of pulse signal output means 31 _{1 to} 31 for outputting pulse signals P _{1 to} P _n synchronized with the rotation of the motor 11. _n and the open / closed state of the window glass 51 based on the pulse signals P _{1 to} P _n ,
The opening / closing state indexing unit 15A for indexing the same number of patterns as the pulse signal output units 31 _{1 to} 31 _n is provided, and the window glass 5 indexed by the opening / closing state indexing unit 15A.
It is characterized in that the presence or absence of a foreign object is detected based on the open / closed states of one plurality of patterns.

Further, the present invention, the open and closed states indexing means 15A, the each pulse signal P ₁ to P _n is the most recent pulse signals P ₁ to P _n every elapsed time reference elapsed time from the output T Elapsed time determining means 15B for determining whether or not _E has been reached is provided. Further, the present invention provides
The open / closed state indexing means 15A has a cycle determining means 15C for determining whether all the cycles of the pulse signals P _{1 to} P _n have reached a predetermined cycle W _REF .

Further, according to the present invention, the opening / closing state indexing means 15A determines whether or not all the opening / closing accelerations of the window glass 51 calculated based on the pulse signals P _{1 to} P _n have reached the reference opening / closing acceleration A _HI. The acceleration determining means 15D for determining whether or not is included. Furthermore, according to the present invention, the open / closed state indexing means 15A is configured so that the pulse signals P _{1 to} P _n
A second acceleration determining means 15E for determining whether or not all opening / closing accelerations of the window glass 51 for a predetermined number of times in the past calculated based on the above have reached a predetermined second reference opening / closing acceleration A _LO . And

[0011]

According to the present invention, pulse signals P _{1 to} P _n synchronized with the rotation of the motor 11 for opening and closing the window glass 51 are output from a plurality of sets of pulse signal output means 31 _{1 to} 31 _n , and these plural pulse signal output means 31 _{1 to} 31 _{n are} output. The presence / absence of a foreign object is detected based on the open / closed states of the plurality of patterns of window glass 51 indexed by the open / closed state indexing means 15A based on the pulse signals P _{1 to} P _n , so that some pulse signal output means 31 _{1 to} 31 _n
Noise is contained in the pulse signals P _{1 to} P _{n from the above,} and the noise is detected as a pulse, or the pulse signals P _{1 to} 31 _n are partially damaged by the pulse signal output means 31 _{1 to} 31 _{n.
Even if 1 to} P _n are not output, the normal pulse signal P from other pulse signal output means 31 _{1 to} 31 _{n
Based on 1 to} P _n , it is possible to reliably detect the presence / absence of a foreign substance being caught and prevent erroneous detection.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a power window pinch detection device according to the present invention will be described below with reference to the drawings. FIG. 2 is an explanatory view showing, in a partial block diagram, a schematic configuration of a power window equipped with an entrapment detection device according to an embodiment of the present invention.
In FIG. 2, 1 is a power window mechanism, and 3 is a pinch detection device. The power window mechanism 1 includes a door 5
For opening and closing the window glass 51, 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 13
A microcomputer that controls the motor 11 to rotate in the opening / closing direction of the window glass 51 in accordance with the operation of
(Abbreviated as microcomputer) 15 and the like. 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 It is confirmed whether or not the elapsed time Ta is longer than the entrapment confirmation time T _E (corresponding to the reference elapsed time, 0.1 sec = second in this embodiment). If the second elapsed time Ta is not the entrapment confirmation time T _E or more (N in step S55), the process proceeds to step S59, and if it is the entrapment confirmation time T _E or more (Y in step S55), the third elapsed time. It is confirmed whether or not the third elapsed time Tb in the 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 (corresponding to a predetermined cycle, 30 ms = millisecond in this 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 cycles Wa _n , Wb _{n of} the first or second pulse signals Pa, Pb are obtained.
Is not more than the reference period W _REF (N), in step S73, the vertical movement amount of the window glass 51 per pulse of the first pulse signal Pa, that is, the pulse resolution Sa (0.65 mm in this embodiment) of 2 twice, the lifting speed Va _n of the first pulse signal Pa of the periodic Wa _n windowpane 51 divided by,
Calculated in the calculation area, and then the calculated ascending / descending speed V
_An is stored in the first speed buffer area of the RAM 15b (step S75). And in the calculation area,
The previous ascent / descent speed Van _{-1 of} the first speed buffer area
Differential speed obtained by subtracting from the lifting speed Va _n a (Va _n -V
a _n-1 ) is the period Wa _n of the first period buffer area
In dividing it, determine the deceleration Aa _n of the window glass 51 (corresponding to acceleration) (step S77), the deceleration Aa _n R
After storing in the first deceleration buffer area of the AM 15b (step S79), the deceleration Aa _n is a threshold value of abrupt deceleration A _HI (normally equivalent to the reference opening / closing acceleration, which is 3500 mm / sec ² in this embodiment). = Milliseconds ² ) or more (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
And deceleration Ab _n (corresponding to acceleration) of the window glass 51 is calculated (step S87), and this deceleration Ab _n is R
After storing in the second deceleration buffer area of the AM 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 (Equivalent to the second reference acceleration, which is 9 in this embodiment.
0 mm / sec ² = millisecond ² ) or more is checked, and if the threshold value A _LO has not been continuously exceeded the predetermined number of times X (N in step S93), the process returns to step S1 and the predetermined number of times is reached. When the threshold value A _{LO is} continuously exceeded for X times (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 apparent from the above description, in this embodiment, the second and third elapsed times Ta and Tb correspond to the elapsed time described in claim 2, and the elapsed time in claim 2 The determination means 15B is composed of steps S55 and S57 in the flowchart of FIG. 8, and the cycle determination means 15C in claim 3 is composed of steps S65 and S71 in the flowchart of FIG. Further, in the present embodiment, the acceleration determining means 15D in claim 4 is composed of step S81 and step 91 in FIG. 9, and the second acceleration determining means 15E in claim 5 is
The open / closed state indexing means 15A in claim 1 comprises step S93 and step S95 in the flowchart of FIG. 10, and these elapsed time determining means 15B, cycle determining means 15C, acceleration determining means 15D, and second
The acceleration determining means 15E is included.

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, a lift request signal 13a is output from the open / close switch 13, and the lift drive signal Ma input to the driver 15e in response thereto causes the window glass 51 to be in 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 motor 11 stops rotating, 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, the first and second pulse signals Pa and Pb are changed at the rising and falling edges 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".

The false pulse generation due to the abnormal output and noise as described above occurs 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 opening / closing switch 13 causes the motor 11 to rotate, and accordingly, the first and second motors are 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 both the increment amounts of the counter values Ca and Cb in the first and second counter areas reach 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 slower, 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.

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.

In this way, the trapping detection device 3 of this embodiment
According to this, the first and second two sensors 31a and 31 of the pulse generator 31 are synchronized with the rotation of the motor 11.
The pulse signals Pa and Pb are output once per revolution from b, and the window glass 5 is based on the timings of the rising and falling edges of these pulse signals Pa and Pb.
The open / closed state of No. 1 is individually detected in two patterns, and based on the detection result, it is detected whether or not a foreign object is caught between the window frame of the door 5 and the window glass 51. Therefore, noise is included in one of the pulse signals Pa and Pb and the noise is detected as a pulse, or one of the first and second two sensors 31a and 31b has a failure, etc. , Pb is not output, the first
Also, it is possible to reliably detect the presence / absence of a foreign substance trapped on the basis of the normal pulse signals Pa and Pb from the other of the second two sensors 31a and 31b.

The decelerations Aa _{n to} Aa _{n- (X-1)} , A for the predetermined number of past X times in the first and second speed buffer areas.
The configuration for detecting whether or not a foreign object is caught depending on whether or not b _{n to} Ab _{n- (X-1)} continuously exceed the threshold value A _LO of the gentle deceleration may be omitted. . However, by providing the above-described configuration, the lifting speed Va _n of the window glass 51, Vb
_The window glass 51 entraps a relatively soft foreign substance such that _n does not decrease sharply, and the deceleration Aa _n of the window glass 51,
Ab _n is a threshold value for rapid deceleration A _HI
Even if not reach, it X times consecutively deceleration threshold A _LO lower deceleration than _{Aa n ~Aa n- (X-1} ) to,
It is possible to reliably detect the entrapment of the foreign matter depending on whether Ab _{n to} Ab _{n- (X-1)} have arrived.

Further, during one operation of the open / close switch 13, 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 the abnormality determination reference value N. If it is above _ABNORM ,
When the position counter restoration process is started and the window glass 51 is opened and closed to the fully open or fully closed position, the first and second position counter areas are determined according to whether the reached position is the fully open position or the fully closed position. The configuration for resetting the count values Ca and Cb of “N” or “0” may be omitted. However, with this configuration, 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, before the difference becomes large. , The count values Ca and Cb are reset to correct values to prevent the reliability of both count values Ca and Cb from being greatly impaired, and the open / close position determined from both count values Ca and Cb is increased from the actual position. It is possible to prevent the shift, which is advantageous.

The boundary position DL where the gap between the weather strip 53 of the door 5 and the window glass 51 disappears, that is,
Entrapment detection area S at the same height as the outer lower end surface 53a of the weather strip 53 and on the fully open position side thereof.
Whether or not the upper end 51a of the window glass 51 is located inside o is determined by the count value C of the first and second position counter areas.
Both a and Cb have the upper end 51 at the boundary position DL.
The configuration for determining whether or not it is equal to or _larger than the boundary value N _DET corresponding to the correct count values Ca and Cb when a is located may be omitted. However, with this configuration, it is unnecessarily detected whether or not the foreign matter is caught by the window glass 51 in the fully closed region Sc where there is no possibility of the foreign matter being caught between the window frame of the door 5 and the window glass 51. This is advantageous because it can be omitted.

Further, it is determined whether or not a foreign substance is caught by the window glass 51, the elapsed times Ta and Tb since the edge detection of the latest pulse signals Pa and Pb, and the pulse signals Pa and
A structure for detecting based on whether or not the periods Wa _n and Wb _{n of} Pb have reached the reference period W _REF , and the deceleration Aa of the window glass 51.
_At least one of the configurations in which _n and Ab _n are detected based on whether or not the threshold value A _HI of the sudden deceleration, which is not normally possible, is detected may be omitted. However, such a configuration is advantageous in that it is possible to more reliably detect the trapping of various foreign substances regardless of the difference in the content of the trapped foreign substances such as the difference in hardness.

Further, in the present embodiment, when the difference value C between the count values Ca and Cb of the first and second position counter areas becomes the reference difference value N _DIFF or more, or when the open / close switch 13 is operated once. , When both the first and second pulse signals Pa and Pb from the first and second sensors 31a and 31b are not continuously output, both count values C
Although the correction of a and Cb is performed, the correction content may be arbitrary or the correction itself may not be performed. However, if it is configured to correct both count values Ca and Cb in the above situation as in the present embodiment, even if there is an output leakage or detection leakage of the first and second pulse signals Pa and Pb, Both count values Ca, Cb
There is an advantage that the reliability of can be maintained high.

Moreover, when the difference value C between the count values Ca and Cb is equal to or greater than the reference difference value N _DIFF , both count values Ca,
In the case of detecting the presence / absence of a foreign object caught in the boundary position DL and the jam detection region So on the side of the fully open position with respect to the boundary position DL, if the larger value of Cb is corrected to match the smaller value. To the corrected count values Ca, C
_Upper edge 5 of window glass 51 when b matches the boundary value N _DET
The position of 1a will not be displaced to the fully closed position side from the boundary position DL. Therefore, after the count values Ca and Cb are corrected, when the window glass 51 reaches the fully closed position and stops, it is erroneously determined that a foreign substance is trapped, and the window glass 51 cannot be forcibly opened and closed. This is advantageous because it can prevent the occurrence of

Further, the first and second sensors 31a, 31
The phase difference between the pulse signals Pa and Pb output by b is 9
Although it may be other than 0 ° or in-phase,
As in this embodiment, the first and second sensors 31a, 31b
If they are configured to output the pulse signals Pa and Pb with their phases shifted by 90 ° from each other, 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.

In this embodiment, the first and second pulse signals Pa and Pb are output in synchronization with the rotation of the motor 11.
Of the two sensors 31a, has been constituting the pulse signal output means 31 ₁ to 31 _n by 31b, the pulse signal output means 3
The number of 1 _{1 to} 31 _n may be three or more, and the number of the position counter means 15A _{1 to} 15A _n can be arbitrarily changed corresponding to the number of the pulse signal output means 31 _{1 to} 31 _n. . Further, in the present invention, the second and third elapsed times Ta,
If Tb does not reach the confirmation time T _E pinching also both, the pulse signal Pa, the period Wa _n of Pb, whether Wb _n has reached the reference period W _REF, deceleration Aa _n, Ab _n threshold A _HI Or not, and the deceleration Aa for the past X times
_n- Aa _{n- (X-1)} and Ab _{n -} Ab _{n- (X-1)} are all threshold A
200 ms from the operation of the opening / closing switch 13 as the time until the rotation of the motor 11 becomes stable, whether or not it has reached _LO
However, the length of this time can be changed arbitrarily.

Further, in this embodiment, the pulse signals Pa, P
Although the configuration is such that the rising and falling edges of b are detected, the configuration for detecting the pulse signals Pa and Pb, such as the configuration for detecting only one of the rising and falling edges, 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.

[0078]

As described above, according to the present invention, there is provided a device for detecting entrapment of foreign matter in a power window for opening and closing a window glass by a motor, which outputs a pulse signal synchronized with the rotation of the motor. A pair of pulse signal output means and an open / closed state indexing means for indexing the open / closed state of the window glass on the basis of each pulse signal by the same number of patterns as the pulse signal output means, and the window indexed by the open / closed state indexing means Based on the open / closed state of a plurality of patterns on the glass, the presence / absence of foreign matter is detected. Therefore, like the period and frequency of the pulse signal,
Hard to be affected by whether the motor rotation is stable,
When the elapsed time after the pulse signal output means outputs the latest pulse signal has reached the reference elapsed time, the elapsed time determination means determines whether or not the motor rotation is unstable. Even in this case, it is possible to reliably detect the presence / absence of a foreign substance being caught.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of a pinch 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 an entrapment 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]

3 Entrapment detection device 11 Motor 15 Microcomputer 15a CPU 15b RAM 15c ROM 15A Open / closed state indexing means 15B Elapsed time determination means 15C Cycle determination means 15D Acceleration determination means 15E Second acceleration determination means 31 _{1 to} 31 _n Pulse signal output means 51 Window Glass _{An to} An- _(X-1) Window glass Vertical deceleration (opening and closing acceleration) A _HI threshold (reference opening and closing acceleration) A _LO threshold (second reference opening and closing acceleration) Ta Second elapsed time Tb Third elapsed time T _E Entrapment confirmation time (reference elapsed time) Pa, Pb pulse signal Wa _n , Wb _n pulse signal cycle W _REF reference cycle (predetermined cycle)

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 device for detecting entrapment of foreign matter in a power window for opening and closing a window glass by a motor, comprising a plurality of sets of pulse signal output means for outputting a pulse signal in synchronization with rotation of the motor, and each of the pulses. The open / closed state of the window glass based on a signal, the pulse signal output means comprises an open / closed state indexing means for indexing the same number of patterns, based on the open / closed state of the plurality of patterns of the window glass indexed by the open / closed state indexing means, An entrapment detection device for a power window, which detects the presence or absence of entrapment of foreign matter. 2. The open / closed state indexing means has an elapsed time determining means for determining whether or not all the elapsed times since the pulse signals output the latest pulse signals have reached a reference elapsed time. The entrapment detection device for a power window according to claim 1. 3. The sandwiching of the power window according to claim 1, wherein the open / closed state indexing means has cycle determining means for determining whether or not all the cycles of the respective pulse signals have reached a predetermined cycle. Detection device. 4. The opening / closing state indexing means has an acceleration determining means for determining whether all the opening / closing accelerations of the window glass calculated based on the pulse signals have reached a reference opening / closing acceleration. Item 2. A pinch detection device for a power window according to item 1, 2 or 3. 5. The opening / closing state indexing means determines whether or not all opening / closing accelerations of a predetermined number of times of the window glass calculated based on the respective pulse signals have reached a predetermined second reference opening / closing acceleration. The entrapment detection device for a power window according to claim 1, 2, 3 or 4, further comprising a second acceleration determining means.