JP3309364B2 - Power window jam detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting that a window glass has caught foreign matter in a power window of an automobile.

[0002]

2. Description of the Related Art Generally, a power window, such as a passenger car, which automatically opens and closes a window glass such as a door window by driving a motor in accordance with a switch operation, is widely used in automobiles. In the power window, a pinch detection device for detecting whether a foreign object such as an article or a part of a body is caught between the door frame and the window glass is being provided.

[0003] One of the conventional examples of such an entrapment detecting device is as follows.
One example is a window glass opening and closing device disclosed in JP-A-63-165682. In the window glass opening / closing device, a ripple current of a motor for window glass opening / closing drive is shaped to generate a motor pulse signal corresponding to the number of rotations of the motor, and based on the motor pulse signal, presence / absence of foreign matter trapping is determined. Detected.

More specifically, in the first embodiment of the window glass opening / closing device, while the window glass is being opened / closed, the number of motor pulse signals currently detected and the switch for opening / closing (elevating) are operated. The position of the window glass is obtained by counting up and down the number of pulses of the motor pulse signal depending on whether or not the period has been set, and the period Tp of the motor pulse signal during opening and closing of the window glass and the period of the The ratio Tp / Tm of the average Tm is determined. When the window glass is located outside the vicinity of the fully closed position, that is, when the window glass is located at a position where foreign matter may be trapped, the ratio Tp / T
If m is equal to or greater than a predetermined value α (Tp / Tm ≧ α), it is determined that a foreign object is interposed.

On the other hand, in the second embodiment of the window glass opening / closing device, the frequency f of the motor pulse signal is obtained from the period Tp of the motor pulse signal, and the window glass is located outside the vicinity of the fully closed position. In this case, the frequency f is equal to or lower than a set frequency f _H corresponding to the predetermined value α (f _H ≧
In the case of f), it is determined that the foreign matter is sandwiched.

Another conventional example of the pinch detecting device is a power window safety device disclosed in Japanese Patent Application Laid-Open No. 5-321530. In the power window safety device, the rotation direction of the motor is detected using two sets of Hall elements that output pulse signals having a phase difference of 90 ° with the rotation of the motor, and the interval time between the pulse signals from the Hall elements is detected. The absolute speed of the opening and closing of the window glass is calculated from the above, and when the absolute speed is lower than the reference speed, it is determined that a foreign object is caught, and the relative speed of the opening and closing of the window glass is determined based on the ratio before and after the pulse signal interval time. Is determined, and it is determined that a foreign object has been caught when the relative speed is significantly reduced below a predetermined rate.

[0007]

However, both of the detection methods of the first and second embodiments of the window glass opening / closing device detect the presence or absence of a foreign object trapped based on the cycle Tp and frequency f of the motor pulse signal. Therefore, there is a problem that the detection operation by this method cannot be performed immediately after starting the motor when the rotation speed of the motor is unstable. The same applies to the safety device of the power window,
In the power window safety device, the presence or absence of foreign matter is detected based on the absolute speed and relative speed of opening and closing of the window glass determined from the interval time of the pulse signal from the Hall element, so the rotation speed of the motor, and thus the When the absolute speed and relative speed of the window glass are not stable,
As in the case of the window glass opening / closing device, there is a disadvantage that the detection operation by this method cannot be performed.

Further, in the above-mentioned window glass opening and closing device, the period Tp and frequency f of the motor pulse signal when foreign matter is sandwiched differ depending on the hardness of the foreign matter sandwiched.
Depending on the hardness of the foreign matter, the ratio Tp / Tm is not always greater than or equal to the predetermined value α.
There is not necessarily equal to or less than the set frequency f _H,
There has been a problem that the entrapment of foreign matter cannot be accurately and reliably detected. Further, the same applies to the safety device of the power window, and the absolute speed and relative speed of opening and closing the window glass when a foreign object is caught differ depending on the hardness of the foreign object that is caught. The relative speed of opening and closing the window glass does not always drop much more than a predetermined rate, and again, the pinching of foreign matter is accurate,
In addition, there is a problem that it cannot be detected reliably.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to detect a pinch of a foreign object even when a motor for opening and closing a window glass is started. It is a second object of the present invention to provide a power window entrapment detection device capable of reliably detecting an entrapped foreign matter irrespective of the content such as its hardness.

[0010]

Means for Solving the Problems] To achieve the first object the present invention, as shown in the basic configuration diagram in FIG. 1, the opening and closing
Rise request signal or descent generated by switch operation
The window glass 5 is driven by the motor 11 which rotates according to the request signal.
A pulse signal output means 31A for outputting a pulse signal PA synchronized with the rotation of the motor 11;
The pulse signal output means 31A outputs the latest pulse signal PA
The pulse signal output means
A predetermined period, which is the reference period of the pulse signal
Remote or not it has reached a long reference elapsed time T _E, the rise
From the generation of the request signal, the rotation of the motor 11 is stabilized.
The elapsed time determining means 15A for determining until a predetermined time as the time until the elapsed time elapses, and detecting the presence or absence of foreign matter being caught based on the determination result of the elapsed time determining means 15A. .

Further, in order to achieve the second object, the present invention provides a method wherein the pulse signal output means 31A outputs the pulse signal PA every time the pulse signal PA is output.
A calculation unit 15B for calculating the opening and closing acceleration A _n of the window glass 51, the opening and closing acceleration A _n to A in the past number of times
_{n- (X-1)} are all further comprising an acceleration judging means 15C determines whether reaching a predetermined reference off acceleration A _LO, whether the determination result of the acceleration determining unit 15C of the foreign object based on entrapment Was detected.

Furthermore, the present invention, the period determination means 15D determines whether the period of the pulse signal PA to the pulse signal output means 31A outputs reaches a predetermined period W _REF
Is further provided, and the presence or absence of foreign matter is detected based on the determination result of the cycle determination unit 15D. Further, in the present invention, the opening / closing acceleration _An is _equal to the reference opening / closing acceleration A
A second acceleration determination means for determining whether or not a second reference opening / closing acceleration A _HI exceeding _LO has been reached;
The presence or absence of a foreign object is detected based on the determination result of the acceleration determination unit 15E. Further, in the present invention, a plurality of sets of the pulse signal output means 31A are provided, and the presence or absence of foreign matter is detected based on the determination result of the pulse signal PA output from each pulse signal output means 31A.

[0013]

According to the present invention, the elapsed time determining means 15A determines, whether the elapsed time from the pulse signal output means 31A is output a latest pulse signal PA has reached the reference elapsed time T _E is It is hardly affected by whether the rotation of the motor 11 is stable, such as the period and frequency of the pulse signal PA. Can be reliably detected.

According to the present invention, the opening / closing accelerations _{An to} An- _(X-1) for the past number of times calculated by the calculating means 15B are provided.
Are all determined by the acceleration determining means 15C to determine whether or not a predetermined reference opening / closing acceleration _ALO has been reached, and if the presence or absence of foreign matter is detected based on the result, the opening / closing speed of the window glass 51 rapidly decreases. Even if a relatively soft foreign substance that does not intervene is trapped, it can be detected reliably by setting the reference opening / closing acceleration _ALO to a value corresponding to the reference opening / closing acceleration _ALO .

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a power window pinching detecting device according to the present invention. FIG. 2 is an explanatory view showing a schematic configuration of a power window including a pinch detection device according to an embodiment of the present invention in a partial block,
In FIG. 2, reference numeral 1 denotes a power window mechanism, and 3 denotes an entrapment detection device. The power window mechanism 1 includes a door 5
A motor 11 for opening and closing the window glass 51, an open / close switch 13 operated to open and close the window glass 51, and an open / close switch 13
A microcomputer that controls the motor 11 to rotate in the opening and closing direction of the window glass 51 in response to the operation of
15 (abbreviated as a microcomputer). The pinch detection device 3 includes a pulse generator 31 that outputs a motor pulse signal corresponding to the number of rotations of the motor 11 and the microcomputer 15 and the like.

The open / close switch 13 is disposed, 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) which can be tilted back and forth. And a self-returning mechanical switch. The open / close switch 13 outputs a rising request signal 13a for raising the window glass 51 to the fully closed position side by operating the operation button so as to tilt forward, and tilts the operation button backward. By operating, a lowering request signal 13b for lowering the window glass 51 to the fully open position side is output.

The pulse generator 31 is connected to the motor 11
, And the pulse generator 31 is
As shown in the figure, the first and second two sensors 31a, 3
1b (corresponding to pulse signal output means). Each of the first and second sensors 31a and 31b is a Hall IC 31 that generates an electromotive force when a magnetic field is applied in a predetermined direction.
c and 31d, and A / D converters 31e and 31f for digitally converting the electromotive force of each of the Hall ICs 31c and 31d. The Hall ICs 31c and 31d are arranged in the radial direction of the output shaft 11a of the motor 11. Output shaft 11
The output shaft 11a is disposed at a position where the distance from the output shaft 11a is equal and the position is shifted by 90 ° in the circumferential direction of the output shaft 11a.

The pulse generator 31 is connected to the output shaft 11.
The magnetic field created by the magnet 17 fixed to the
As each of the Hall ICs 31c,
An electromotive force is generated in each of the first and second sensors 31a and 31b by the electromotive force, as shown in FIG.
Pb is configured to be output once each time the motor 11 makes one rotation.

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. When the motor 11 rotates in the direction to move to the fully closed position side, the output directions of the first and second pulse signals Pa and Pb, and arrow B indicate the direction in which the window glass 51 moves down to the fully open position side. 11 shows output directions of the first and second pulse signals Pa and Pb when the rotation of the motor 11 is performed. As is clear from FIG. 4, when the window glass 51 rises, the first pulse signal Pa from the first sensor 31a is output.
Is 90 ° ahead of the phase of the second pulse signal Pb from the second sensor 31b, and when the window glass 51 descends,
The phase of the second pulse signal Pb from the second sensor 31b precedes 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 includes a CPU (Central Processing Unit).
, Central processing unit) 15a and RAM (Random Access M)
emory) 15b and ROM (Read-Only Memory) 15c
It is composed of

The motor 11 is connected to the CPU 15a via an output interface 15d and a driver 15e. The open / close switch 13 and first and second sensors 31a and 31b are connected via an input port 15f.
Are connected respectively. The RAM 15b is configured as shown in FIG.
As shown by a memory area map, the data area has a data area for storing various data and a work area used for various processing operations. Among them, the work area includes an operation, first to fourth position counters, and a one-side sensor failure diagnosis counter. (Hereinafter abbreviated as one-sided counter), first and second detection timing buffers, first and second period buffers, first and second speed buffers, first and second deceleration buffers, first
Each area of the third to fourth elapsed time measurement timers 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 flowcharts of FIGS. When the microcomputer 15 is started and the program is started, as shown in FIG. 7, the CPU 15a checks whether or not there is an output of either the rising request signal 13a or the falling request signal 13b from the open / close switch 13. Then, if neither signal is output (N in step S1), the output of the motor 11 ascending and descending 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 measurement of the first elapsed time Tu, which is the elapsed time from the start of the output of the rising 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.

If either 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. It is confirmed (step S9), and when the signal is 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 the signal is not the rising request signal 13a (N in step S9), a lowering driving signal Mb for rotating the motor 11 in the lowering direction of opening the window glass 51 is output to the driver 15e (step S9).
15), and proceed to step S17.

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

[0025] 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 up to the time Tan _{+ 1} when 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 (Step S19)
d).

If 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. If the output levels are not equal (N in step S19d), the count value Ca is set to “1”. After decrementing (step S19f), the process proceeds to step S19g. In step S19g, RAM1
In the calculation area 5b, a second value of the RAM 15b to be described later is calculated based on the count value Ca of the first position counter area.
A difference value C obtained by subtracting the count value Cb of the position counter area is obtained, and then the absolute value of the difference value C is used as a reference difference value N _DIFF
It is confirmed whether or not it is above (step S19h).

Each of the count values Ca and Cb in the first and second position counter areas decreases when the window glass 51 increases in the closing direction, and increases when the window glass 51 decreases in the opening direction. I do. Then, the respective count values C
“a” and “Cb” become “0” when the window glass 51 is in the fully closed position, and become “N” when the window glass 51 is in the fully opened position. The first and second pulse signals Pa and Pb are output once each with a phase shift of 90 ° each time the motor 11 rotates once, so that the first and second sensors 31a and 31b are output.
As long as both b operate normally, the absolute value of the difference value C is “0” or “1”. Therefore, the reference difference value N
_DIFF may be set to “2”, but in this embodiment, the false first and second pulse signals Pa and Pb generated by noise are used.
Assuming a case where the rising edge is counted, the reference difference value N _DIFF is set to “3” including some margin.

If the difference value C is not equal to or larger than the reference difference value N _DIFF (N in step S19h), the process proceeds to step S1.
9n, if the difference is equal to or greater than the reference difference value N _DIFF (Y in step S19h), the count value Ca
It is checked 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 if 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 the process proceeds to step S19n.

In step S19n, the rising drive signal Ma
Or, confirm whether or not the descending drive signal Mb is output,
If not output (N in step S19n), FIG.
The process proceeds to step S21 in the flowchart of (1), and if the output is performed (Y in step S19n), the first and second sensors 3
The count value Cc of the one-sided counter area of the RAM 15b is incremented by "1" to confirm whether one of 1a and 31b is out of order (step S19).
p), the absolute value of the count value Cc is equal to the abnormality determination reference value N
It is checked whether it is _ABNORM or more (step S19)
r).

The count value Cc of the one-sided counter area is incremented by "1" every time the first pulse signal Pa is output, and is "1" every time the second pulse signal Pb is output, as described later. It is decremented by one. As shown in FIG. 4, the rising and falling edges of the first and second pulse signals Pa and Pb alternate as long as both the first and second sensors 31a and 31b operate normally. Occurs and therefore the count value Cc
Is “0” or “1”. Moreover, the count value Cc is determined by the rising drive signal Ma and the falling drive signal Mb.
When the output of is stopped, it is reset to zero. For this reason,
Although the abnormality determination reference value N _ABNORM may be set to “2”, in the present embodiment, the first and second sensors 31a, 31a are output by one output of the rising drive signal Ma and the falling drive signal Mb.
The abnormality determination reference value N _ABNORM is set such that the entrapment detection processing operation is performed only when 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 equal to or greater than the abnormality determination reference value N _ABNORM (step S1).
N at 9r), the process proceeds to step S21, and the abnormality determination reference value N
If it is _{equal to} or greater than _ABNORM (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 the position counter recovery process (step S19t).

In the position counter restoring process, a flowchart is omitted, but in brief, the window glass 51 is caused to reach a fully open or fully closed position by operating the open / close switch 13 in a predetermined pattern. When it is detected that the fully-opened or fully-closed position has been reached by the same processing as in steps S25 to S29 or the steps S37 to S45 in the flowchart of FIG. 8, the detected position is determined to be the fully open position or the fully closed position. The count values Ca and Cb of the first and second position counter areas are set to "N" or "0" according to the position. When the position counter recovery processing is completed, the process proceeds to step S21.

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

In the second sensor pulse detection interrupt processing at step S23, as shown in FIG. 12, first, at step S23a, the time Tb _{n at} which the rising or falling edge of the second pulse signal Pb is detected is determined. , RAM1
5b, and in the subsequent step S23b, in the third elapsed time measurement timer area of the RAM 15b, the next second time from the time Tb _n
The measurement of the third elapsed time Tb, which is the elapsed time until the time Tb _{n + 1} at which the rising or falling edge of the pulse signal Pb is detected, is stopped and reset to zero. Further, in the third elapsed time measuring timer area to start measuring the third elapsed time Tb (step S23c), followed by first and second pulse signal Pa at the time point Tb _n, the output level of Pb different It is checked whether or not it has been performed (step S23d). If the output levels of the first and second pulse signals Pa and Pb are different (Y in step S23d), the count value Cb of the second position counter area is incremented by "1" (step S23e), and then step S23g. And 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 the process proceeds to step S23g.

In step S23g, step S1 is executed.
9g, a difference value C is obtained in the calculation area 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 the difference value C is used as the reference difference. It is checked whether the value is equal to or more than the value N _DIFF (step S23h). If it is not equal to or greater than the reference difference value N _DIFF (N in step S23h),
23n, and when the difference is equal to or larger than the reference difference value N _DIFF (Y in step S23h), similar to step S19j,
It is determined 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 the count value Ca is corrected to the same value as the count value Cb (step S23k), the process proceeds to step S23n. If the count value Ca is not greater than the count value Cb (N in step S23j), the count value Ca is corrected. After correcting Cb to the same value as the count value Ca (step S23)
m), and proceeds to step S23n.

In step S23n, step S1 is executed.
9n, the ascending drive signal Ma or the descending drive signal Mb
It is confirmed whether or not 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 S23).
n, Y), the count value Cc of the one-sided counter area is decremented by "1" (step S23p), and it is confirmed whether or not the absolute value of the count value Cc is equal to or greater than the abnormality determination reference value N _ABNORM (step S23r). . Count value Cc
If the absolute value of is not more than the abnormality determination reference value N _ABNORM (N in step S23r), the process proceeds to step S25, and if it is more than the abnormality determination reference value N _ABNORM (step S2).
At 3r, N), it is determined that one of the first and second sensors 31a and 31b has failed, and the process proceeds to the position counter recovery process (step S23t), and then proceeds to step S25.

As shown in FIG. 7, in step S25,
Check whether the lowering drive signal Mb is output,
If it is not output (N in step S25), the process proceeds to step S37, and if it is output (step S25).
Y), it is determined whether or not the second elapsed time Ta in the second elapsed time measurement timer area is equal to or longer than the fully open / closed 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 and full-close confirmation time T _LOCK (N in step S27), the process returns to step S1. If the second elapsed time Ta is equal to or longer than the full-open and full-close confirmation time T _LOCK (Y in step S27), It is determined 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 S).
29).

[0038] The case third elapsed time Tb is fully opened not fully closed confirmation time T _LOCK more (N in step S29), the process returns to step S1, when fully opened is fully closed confirmation time T _LOCK further in (step S29 Y), falling drive signal Mb
Is stopped (step S31), and the count value Cc of the one-sided counter area is reset to zero (step S31).
33), a lowering request signal 13b from the open / close switch 13
It is determined whether or not is output (step S3).
5). If the descending request signal 13b has been output (Y in step S35), step S is executed until the signal is no longer output.
35 is repeated, and if no data is output (N in step S35), the process returns to step S1.

In step S37, as shown in FIG.
Check whether the rising drive signal Ma is output,
If not (N in step S37), the process returns to step S1, and if it has been output (step S37).
At 37, the process proceeds to step S39. In step S39, the count value Ca of the first position counter area is
It is checked whether the value is equal to or _larger than the boundary value N _DET . As shown in FIG. 13, the boundary value _NDET is a boundary position DL at which the gap between the weather strip 53 of the door 5 and the window glass 51 is eliminated, that is, the upper end 51 of the window glass 51 at the fully closed position.
When the upper end 51a is located at the same height as the outer lower end surface 53a of the weather strip 53, which is 13 mm below the position a, it corresponds to the correct count values Ca and Cb of the first and second position counter areas. In this embodiment, the boundary value N _DET is set to “20”.

Accordingly, the window glass 51 is located in the fully closed area Sc above the boundary position DL where there is no possibility of foreign matter being pinched.
When the upper end 51a of the
The upper end 51a of the window glass 51 is located at the boundary position DL where a and Cb are smaller than the boundary value N _{DET and} there is a possibility that foreign matter may be interposed, and the entrapment detection area So (corresponding to a predetermined detection area) therebelow. In this case, the count values Ca and Cb are equal to or _larger than the boundary value N _DET . And FIG.
If the count value Ca is not equal to or _larger than the boundary value N _DET (N in step S39), as shown in FIG.
When the count value Ca is equal to or _larger than the boundary value N _DET (Y in step S39), the process proceeds to step S41.

In step S41, it is checked whether or not the count value Cb of the second position counter area is equal to or _larger than the boundary value N _DET . If it is equal to or _larger than the boundary value N _DET (Y in step S41). If it is not equal to or greater than the boundary value N _DET (N in step S41), the process proceeds to step S43. In step S43, it is determined whether or not the second elapsed time Ta in the second elapsed time measurement timer area is _{equal to} or longer than the fully open / closed confirmation time T _LOCK . If the second elapsed time Ta is not equal to or longer than the full-open fully closed confirmation time T _LOCK (N in step S43), the process returns to step S1, and if the second elapsed time Ta is equal to or longer than the full-open fully closed confirmation time T _LOCK (Y in step S43), It is determined 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).

If the third elapsed time Tb is not equal to or longer than the full-open fully-closed confirmation time T _LOCK (N in step S45), the process returns to step S1, and if the third elapsed time Tb is longer than the full-open fully closed confirmation time T _LOCK (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), a rising request signal 13a from the open / close switch 13
Is checked (step S5).
1). If the ascending request signal 13a has been output (Y in step S51), step S is executed until the signal is no longer output.
When the output of the first elapsed time Tu in the first elapsed time measurement timer area is stopped and reset to zero (step S53), the process returns to step S1. To return.

If it is determined in step S41 that the count value Cb of the second position counter area is equal to or _larger than the boundary value N _DET (Y), the process proceeds to step S55. the elapsed time Ta is sandwiched confirmation time T _E (corresponding to the reference elapsed time, in this embodiment 0.1 sec = seconds) to confirm whether or not more. Wherein when the second elapsed time Ta is not pinching the confirmation time T _E above (N in step S55), the process proceeds to step S59, the case is pinching confirmation time T _E above (in step S55 Y), the third elapsed time third elapsed time Tb of measuring timer area confirms whether a pinching confirmation time T _E above (step S57). If the not third elapsed time Tb entrapment confirmation time T _E above (N in step S57), the process proceeds to step S59, the case is pinching confirmation time T _E above (Y in step S57), the process proceeds to step S97.

[0044] In step S55 or step S57, the second or the second or the third elapsed time Ta of the third elapsed time measuring timer area, Tb is proceeds if not continuous pinching confirmation time T _E above (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, whether 200 ms or more has elapsed since the start of output of the rising request signal 13a in step S5. If the first elapsed time Tu is not equal to or longer than 200 ms (N in step S59), the process returns to step S1 and 200
ms (Y in step S59), step S
Go to 61.

In 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
(Corresponding to a predetermined period, 30 ms = millisecond in this embodiment) or not (step S65).

[0046] Unless the cycles Wa _n is a reference period W _REF more (N in step S65), the process proceeds to step S73, if the reference period W _REF above (in step S65 Y), the second detection timing buffer The stored time difference between the edge detection points Tb _n and Tb _n−2 of the latest rising edge or falling edge of the second pulse signal Pb two times before, that is, the period Wb _n of the second pulse signal Pb is calculated. It is determined 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 it is confirmed whether or not this cycle Wb _n is _equal to or longer than the reference cycle W _REF (step S71). The cycle Wb _n is the reference cycle W
If it is not equal to or greater than _REF (N in step S71), the process proceeds to step S73. If it is equal to or greater than the reference cycle W _REF (Y in step S71), the process proceeds to step S97.

In step S65 or step S71, the periods Wa _n , Wb _{n of} the first or second pulse signals Pa, Pb
Is not greater than or equal to the reference cycle W _REF (N), in step S73, the amount of movement of the window glass 51 per one pulse of the first pulse signal Pa, that is, 2 of the pulse resolution Sa (0.65 mm in this embodiment). 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 lifting speed V
_An is stored in the first speed buffer area of the RAM 15b (step S75). Then, in the calculation area,
The previous elevating speed V an _{-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 ) to the cycle Wa _n of the first cycle 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 AM15b (step S79), the deceleration Aa _n is abrupt deceleration not be a normal threshold A _HI (corresponding to the second reference-off acceleration, the present embodiment is 3500 mm / sec ² = millisecond ² )
It is confirmed whether or not it is the above (step S81).

[0048] Unless the deceleration Aa _n threshold A _HI more (N in step S81), the process proceeds to step S93, if the above threshold value A _HI (Y in step S81), 1 pulse of the second pulse signal Pb The amount of movement of the window glass 51 per hit, that is, the pulse resolution Sb (= Sa, 0.65 in this embodiment)
twice the mm), the lifting speed Vb _n of the second pulse signal Pb period Wb _n windowpane 51 divided by, calculated (step S83 in the operation area), obtained the elevating velocity V
storing b _n to the second speed buffer area of the RAM 15b (step S85). Then, in the calculation area,
The previous lifting / lowering speed Vb _{n-1 of} the second speed buffer area
The differential speed which is obtained by subtracting from the elevating speed Vb _n the (Vb _n -V
b _n-1 ) with the cycle Wb _n of the second cycle buffer area.
In dividing it, determine the deceleration Ab _n of the window glass 51 (corresponding to acceleration) (step S87), the deceleration Ab _n R
After storing in the second deceleration buffer area of AM15b (step S89), the deceleration Ab _n checks whether it is the threshold value A _HI above (step S91).

[0049] If the deceleration Ab _n threshold A _HI above (Y in step S91), the process proceeds to step S97, if equal to or larger than the threshold 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 reference acceleration, 90 m in this embodiment)
m / sec ² = millisecond ² ) or not, and if the predetermined number of times X does not continuously exceed the threshold value A _LO (N in step S 93), the process returns to step S 1 and the predetermined number of times. If X is equal to or higher than the threshold value A _LO continuously (Y in step S93), the process proceeds to step S95.
In this embodiment, the predetermined number X is six.

In step S95, the decelerations Ab _{n to} Ab for the predetermined number of times X in the second speed buffer area are performed.
_It is checked whether or not _{n- (X-1)} has continuously exceeded the deceleration threshold value A _LO . If the predetermined number of times X has not exceeded the threshold value A _LO continuously (step S 95: N ), The process returns to step S1. If the number of times X is equal to or greater than the threshold value A _LO for a predetermined number of times X (Y in step S95), the process returns to step S1.
Go to 97. In step S97, the descending drive signal Mb is output to the driver 15e.
Step S9 in the elapsed time measurement 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 Step 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).
Count value Cd of the fourth position counter area of AM15b
Then, 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 increment value Cf of the count value Ca after outputting the descending drive signal Mb in step S97 is calculated. It is determined in the calculation area (step S105). Then, it is checked whether or not the increase value Cf has reached a predetermined entrapment release drive value Nr (230 in this embodiment) (step S10).
7) If it has reached (Y in step S107), the process proceeds to step S109; if not (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 count value Cb is incremented after the descending drive signal Mb is output in step S97. In the calculation area. Then, it is confirmed whether or not the increase value Cg has reached the entrapment release drive value Nr (step S111). 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
Proceed to 3.

In step S113, it is checked whether or not the fourth elapsed time Ts is continuous for the full-open / fully-closed confirmation time _TLOCK or more. If it is not continuous (step S11).
(N in 3), the process returns to step S105, and if they are continuous (Y in step S113), step S115
Proceed to. In step S115, the output of the descending drive signal Mb is stopped. Next, the measurement of the fourth elapsed time Ts in the fourth elapsed time measurement timer area is stopped and reset to zero (step S117). The count value Cc is reset to zero (step S119),
Further, an ascending request signal 13a is output from the open / close switch 13.
It is confirmed whether or not is output (step S12).
1). If the ascending request signal 13a is output (Y in step S121), step S121 is repeated until the signal is no longer output. If not (N in step S121), the first elapsed time measurement timer area is After the measurement of the first elapsed time Tu is stopped and reset to zero (step S123), the process returns to step S1.

As is apparent from the above description, in the present embodiment, the second and third elapsed times Ta and Tb correspond to the elapsed time according to the first aspect, and the pulse signals Pa and Pb correspond to the first aspect. The first and second sensors 31a and 31b correspond to the pulse signal output means 31A. Further, in this embodiment, the elapsed time determination means 15A in claim 1 is constituted by steps S55 and S57 in the flowchart of FIG. 8, and the calculation means 15B in claim 2 is executed by step S61 in the flowchart of FIG. , Step S63, Step S73, Step S79, Step S83, and Step S87, and the acceleration determining means 15C is configured by Step S93 and Step S95 in the flowchart of FIG. Further, in the present embodiment, the cycle determination means 15D in claim 4 is constituted by steps S65 and S71 in FIG. 9, and the second acceleration determination means 1D in claim 4
5E is composed of step S81 and step 91 in FIG.

Next, the operation (operation) of the power window of the present embodiment having the above-described configuration will be described. First, when the opening / closing switch 13 is tilted backward, a lowering request signal 13b is output from the opening / closing switch 13, and the lowering drive signal Mb input to the driver 15e is accordingly generated.
The motor 1 moves in a direction to lower the window glass 51 to the fully open position side.
1 rotates. Then, every time the motor 11 makes one rotation, the second sensor 31b outputs the second pulse signal Pb once, and the first sensor 31a is delayed from the second pulse signal Pb by a phase of 90 °. 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 the second and third elapsed times Ta and Tb both reach the fully open and fully closed confirmation time T _LOCK , the downward drive to the driver 15 e is performed even if the open / close switch 13 is continuously tilted backward. Signal M
The input of b is stopped. Here, the backward tilting operation of the open / close switch 13 is temporarily released, and then the open / close switch 1 is released.
When the driver 3 tilts rearward again, the lowering drive signal Mb is input again to the driver 15e. However, since the window glass 51 does not move at the fully open position and the motor 11 does not rotate, the first and second sensors 31a and 31b output the lower signal. 1st and 2nd pulse signal P
a, Pb is not outputted, therefore, the fully opened downward input of the drive signal Mb to the driver 15e after a fully closed confirmation time T _LOCK is stopped again.

When the motor 11 rotates in a direction to lower the window glass 51 to the fully open position, the first sensor 31a
The signal levels of the first and second pulse signals Pa and Pb match at the time of rising and falling of the first pulse signal Pa output from the first pulse signal Pa. For this reason, as the window glass 51 descends to the fully open position side, the count value Ca of the first position counter area for counting the open / close position of the glass window becomes:
Each time the first pulse signal Pa is output, the count value Cb is incremented by "1", and similarly, the count value Cb of the second position counter area is incremented by "1" every time the second pulse signal Pb is output. When the window glass 51 reaches the fully open position, the count values Ca, Ca, in the first and second position counter areas, unless the first and second pulse signals each include a false pulse due to output abnormality or noise. Cb
Are both "N".

On the other hand, when the opening / closing switch 13 is tilted forward, an ascending request signal 13a is output from the opening / closing switch 13, and the ascending drive signal Ma input to the driver 15e moves the window glass 51 to the fully closed position. The motor 11 rotates in the direction in which the motor 11 is moved upward. Then, motor 1
Each time 1 rotates once, the first sensor 31a outputs the first pulse signal Pa once, and the second sensor 31b outputs the second pulse signal with a 90 ° phase delay 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 the second and third elapsed times Ta and Tb both reach the fully open and fully closed confirmation time T _LOCK , even if the open / close switch 13 is continuously tilted forward, the upward movement to the driver 15 e is performed. Drive signal M
The input of a is stopped. Here, the backward tilting operation of the open / close switch 13 is temporarily released, and then the open / close switch 1 is released.
When the driver 3 tilts rearward again, the lowering drive signal Mb is input again to the driver 15e. However, since the window glass 51 does not move at the fully open position and the motor 11 does not rotate, the first and second sensors 31a and 31b output the lower signal. 1st and 2nd pulse signal P
a, Pb is not outputted, therefore, the fully opened downward input of the drive signal Mb to the driver 15e after a fully closed confirmation time T _LOCK is stopped again.

When the motor 11 rotates in a direction to raise 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 of the first pulse signal Pa. Signal levels do not match.
Therefore, as the window glass 51 rises to the fully closed position side, the count value Ca of the first position counter area is increased.
Is decremented by “1” every time the first pulse signal Pa is output, and similarly, the count value Cb of the second position counter area is decremented by “1” every time the second pulse signal Pb is output. The count value Ca of the first and second position counter areas at the time when the window glass 51 reaches the fully closed position, unless the first and second pulse signals each have a false pulse due to output abnormality or noise. , Cb
Are both "0".

The generation of a false pulse due to output abnormality or noise as described above is present in the first and second pulse signals.
Thus, if the count values Ca and Cb of the first and second position counter areas are not normal at any time, the count value C is set when the difference becomes "3".
The larger count value of a and Cb is corrected to a smaller count value.

Further, the motor 11 is rotated by the tilting operation of the open / close switch 13, and the first and second motors are accordingly rotated.
The sensors 31a and 31b output the first and second pulse signals Pa,
When Pb is output, regardless of its 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 When the second pulse signal Pb is output, it is decremented by "1".

During one tilting operation of the open / close switch 13, the first and second pulse signals Pa, Pa, due to the failure of 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 recovery processing is performed.
When the window glass 51 reaches the fully open or fully closed position, the count values Ca and Cb of the first and second position counter areas become "N" when the window is fully open and "0" when it is fully closed. Each is corrected.

Next, in a state where the upper end 51a of the window glass 51 is located at the boundary position DL and the entrapment detection area So below the same, the upward movement of the open / close switch 13 to the driver 15e with the forward tilt operation. By the input of the drive signal Ma, the motor 11 rotating in a direction to raise 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 the first and second sensors 31a and 31b are stopped by a foreign substance sandwiched between the first and second pulse signals P and
a and Pb are no longer output. In this case, the counter values Ca and Cb of the first and second counter areas are used.
Are both equal to or greater than the boundary value N _DET , and the state in which the first and second pulse signals Pa and Pb are not output continues.
The second and third elapsed times Ta, T, which are the elapsed times.
When b reaches both the pinching confirmation time T _E, following pinching release operation is performed.

In the entrapment release operation, the open / close switch 13
, The input of the ascending drive signal Ma to the driver 15e is stopped, and then the descending drive signal Mb is input to the driver 15e to
The motor 11 rotates in a direction to lower the motor to the fully open position side. Then, after both the increments of the counter values Ca and Cb in the first and second counter areas from the start of the input of the descending drive signal Mb to the driver 15e reach the pinch release specified value Nr, the descending drive signal Mb Driver 1
The input to 5e is stopped, and the rotation of the motor 11 is stopped. Thereby, the amount sufficient to eliminate the foreign substance entrapment state (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).

The period from the start of the input of the descending drive signal Mb to the driver 15e until the increments of the counter values Ca and Cb in the first and second counter areas both reach the entrapment release specified value Nr. If the window glass 51 reaches the fully open 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 the operation when the normal window glass 51 is opened.

As described above, the window frame of the door 5 and the window glass 51
When the rotation of the motor 11 is stopped by a foreign substance caught between the two, the above-described pinching release operation is performed according to the length of the stop time. However, just because a foreign matter is caught between the window frame of the door 5 and the window glass 51 does not necessarily stop the rotation of the motor 11, and the motor 11 does not stop and rotates depending on the hardness of the caught foreign matter. You may continue to do so.
Therefore, the upper end 51a of the window glass 51 is located at the boundary position DL and the pinch detection area So below the boundary position DL, and the counter values Ca and Cb of the first and second counter areas are located.
_Are both greater than or equal to the boundary value N _DET , the period Wa _n , Wb _{n of} the first and second pulse signals Pa, Pb, , deceleration Aa _n of the motor 11, Ab _n
Is performed depending on the value of.

First, the rotation of the motor 11 is considerably slowed down, and the periods Wa _n and Wb _n are both _equal to the reference period W _REF.
In the case described above, the sandwiching operation is performed. Next, even if at least one of the periods Wa _n and Wb _n is less than the reference period W _REF , the deceleration Aa _n and Ab b
_n is a sudden decrease which is far from ordinary, such as a squeak of the glass window 51 against the window frame of the door 5 or a deceleration when the motor 11 is decelerated due to the contact of the hand or the body with the glass window 51. When the speed becomes equal to or higher than the threshold value A _HI , the pinching operation is performed. Further, at least one of the periods Wa _n and Wb _n is less than the reference period W _REF , and
The deceleration Aa _n, at less than at least one of the threshold A _HI of Ab _n, deceleration Aa _n of past predetermined number X min
~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.

It should be noted that the periods Wa _n and Wb _n and the deceleration Aa
The execution determination of the entrapment release operation based on the values of _n and Ab _n
The rotation speed of the motor 11, and thus the periods Wa _n , W
b _n and deceleration Aa _n, in order to stabilize the value of the Ab _n,
The operation is performed after a lapse of 200 ms from the start of the output of the rising request signal 13a by the forward tilting operation of the open / close switch 13. Further, the upper end 51a of the window glass 51 is located in the fully closed area Sc above the boundary position DL, and the outer lower end surface 53a of the weather strip 53 and the window glass 5
When no gap is formed between the upper ends 51a of the first and second counters 51a, both of the counter values Ca and Cb in the first and second counter areas are smaller than the boundary value N _DET , so that the above-described foreign object entrapment detecting operation is performed. Is not performed. Further, when the window glass 51 is lowered, there is no fear that a foreign object is caught between the window frame of the door 5 and the window glass 51. Therefore, the above-described foreign object detection operation is not performed in this case.

As described above, the pinch detection device 3 of this embodiment
According to the first embodiment, the first and second two sensors 31 a and 31 of the pulse generator 31 are synchronized with the rotation of the motor 11.
b, the pulse signals Pa and Pb are output once per rotation, and the second and third pulses after the rising and falling edges of these pulse signals Pa and Pb are finally detected.
The elapsed time Ta, depending on whether it has reached the Tb entrapment confirmation time T _E, and configured to detect whether foreign matter is caught between the window frame and the window glass 51 of the door 5. Therefore, the period Wa _n of the motor 11, the lifting speed Va _n of Wb _n and window glass 51, even when starting the rotation speed of the motor 11 which controls the Vb _n is not stable, the rotational speed stability, instability effects The second and third signals after the previous rising and falling edges of the pulse signals Pa and Pb are hardly detected.
The presence or absence of the foreign matter can be reliably detected based on the elapsed time.

Further, according to this embodiment, the deceleration Aa of the first and second speed buffer areas for a predetermined number of times X in the past.
_{n ~Aa n- (X-1)} , Ab n ~Ab n- (X-1) is continuously,
It is configured to detect whether or not a foreign object is caught according to whether or not the threshold value of the slow deceleration _{ALO is} exceeded. Therefore, the lifting speed Va _n of the window glass 51, Vb _n is sharply pinching window glass 51 of relatively soft foreign matter so as not to decrease the deceleration Aa _n of the window glass 51, is Ab _n, there is usually obtained even if does not reach the no abrupt deceleration threshold a _HI, deceleration Aa _n ~Aa continuously X times the threshold a _LO lower deceleration than _{n- (X-1), Ab} n ~ Ab
Whether or not _{n- (X-1)} has been reached can reliably detect the entrapment of the foreign matter.

During one operation of the open / close switch 13,
When either one of the pulse signals Pa and Pb is not continuously output and the absolute value of the count value Cc in the one-side counter area is equal to or _larger than the abnormality determination reference value N _ABNORM , the process _proceeds to the position counter recovery process, and the window is _opened. When the glass 51 is opened and closed to the fully open or fully closed position, the count values Ca and Cb of the first and second position counter areas are set to "according to whether the reached position is the fully open position or the fully closed position. "N" or "0"
The configuration for resetting to may be omitted. However, with such a configuration, even if a difference occurs between the count values Ca and Cb of the first and second position counter areas due to output leakage or count leakage of the pulse signals Pa and Pb, before the difference becomes large. By resetting the count values Ca and Cb to correct values, the reliability of both count values Ca and Cb is prevented from being greatly impaired, and the open / close position determined from both count values Ca and Cb becomes larger than the actual position. It is possible to prevent the displacement, which is advantageous.

The boundary position DL at which the gap between the weatherstrip 53 of the door 5 and the window glass 51 disappears, that is,
The pinch detection area S at the same height as the outer lower end face 53a of the weather strip 53 and at the fully open position side thereof
Whether or not the upper end 51a of the window glass 51 is positioned within the area o is determined by the count values C of the first and second position counter areas.
a and Cb are both located at the boundary position DL at the upper end 51.
The configuration for determining whether or not the count value is equal to or greater 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, in the fully closed region Sc where there is no possibility of foreign matter being caught between the window frame of the door 5 and the window glass 51, it is wastefully detected whether or not foreign matter is caught by the window glass 51. This is advantageous because it can be avoided.

Further, it is determined whether or not the foreign matter is caught by the window glass 51 by determining the elapsed times Ta and Tb since the edge detection of the recent pulse signals Pa and Pb, and the pulse signals Pa and Pb.
Cycle Wa _n of Pb, configurations and the Wb _n is detected based on whether or not reached the reference period W _REF, deceleration Aa of the window glass 51
_At least one of the configurations for detecting based on whether _n and Ab _n have reached a threshold A _HI for rapid deceleration, which is not normally possible, may be omitted. However, such a configuration is advantageous in that various foreign substances can be detected without fail irrespective of differences in the content of the foreign substances, such as differences in hardness.

In this embodiment, when the difference value C between the count values Ca and Cb in the first and second position counter areas becomes equal to or _larger than the reference difference value N _DIFF, or when the open / close switch 13 is operated once. When only one of the first and second pulse signals Pa and Pb from the first and second sensors 31a and 31b is not continuously output, the two count values C and
Although the correction of a and Cb is performed, the content of the correction may be arbitrarily set or the correction itself may not be performed. However, as in the present embodiment, if the two count values Ca and Cb are configured to be corrected in the above-described situation, even if the first and second pulse signals Pa and Pb have output omissions or detection omissions, etc. The two count values Ca, Cb
There is an advantage that the reliability of can be maintained high.

Further, 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 and Cb
If the configuration in which the larger value of Cb is corrected so as to match the smaller value is used, it is possible to detect the presence / absence of a foreign object in the boundary position DL and the entrapment detection area So on the fully open position side from the boundary position DL. And the corrected count values Ca, C
The position where b and the boundary value _NDET match does not shift to the fully closed position side. Therefore, after the correction of the count values Ca and Cb, when the window glass 51 reaches the fully closed position and stops, it is erroneously determined that a foreign object has been caught, and
Can be prevented from being forced to open and cannot be closed.

Further, the first and second sensors 31a, 31
The phase shift of the pulse signals Pa and Pb output by b is 9
It may be other than 0 ° or in-phase,
As in the present embodiment, the first and second sensors 31a, 31b
However, if the pulse signals Pa and Pb are output with their phases shifted by 90 ° from each other, the following advantages can be obtained. That is, when the signal levels of the two pulse signals Pa and Pb at the time of rising and falling of the pulse signal Pa match or mismatch, the motor 11 lowers the window glass 51 to the fully open position side and completely closes the window glass 51. It is possible to detect which of the directions of ascending to the position side the rotation is being made.

For this reason, for example, the inertia of the motor 11 after the operation of the open / close switch 13 is stopped, or the backlash of a gear train (not shown) constituting the power transmission system between the motor 11 and the window glass 51, etc. Even if the motor 11 rotates even though the open / close switch 13 is not operated, the rotation direction of the motor 11 at that time is changed by the open / close switch 1.
3 can be reliably detected regardless of the operation state. However, the plurality of pulse signals P1 to _Pn thus shifted in phase from each other
Whether or not to detect the rotation direction of the motor 11 is arbitrary. Of course, the rotation direction of the motor 11 may be detected by operating the open / close switch 13 or other means. In that case, A configuration corresponding to the rotation direction detecting unit 15C may be omitted.

Further, in this embodiment, the first and the second output pulse signals Pa and Pb in synchronization with the rotation of the motor 11 are described.
Although the pulse signal output means 31A is constituted by the two sensors 31a and 31b, the number of pulse signal output means 31A may be singular or three or more. Also pulse signal output means 31
It can be arbitrarily changed according to the number of A. Furthermore, in the present invention, the second and third elapsed time Ta, if Tb does not reach the confirmation time T _E pinching also both, the pulse signal P
a, Pb periods Wa _n , Wb _n have reached the reference period W _REF , decelerations A a _n , Ab _n have reached the threshold value A _HI , and the past X decelerations A a _n ~ A
a _{n- (X-1),} whether or not reached _{Ab n ~Ab n- (X-1} ) are all the threshold A _LO, as the time until the rotation of the motor 11 is stabilized, the operation of the opening and closing switch 13 It is performed after 200 ms has elapsed, but the length of this time can be arbitrarily changed.

In this embodiment, the pulse signals Pa, P
Although the configuration for detecting the rising edge and the falling edge of b has been described, the configuration for detecting the pulse signals Pa and Pb, such as the configuration for detecting only one of the rising and falling edges, has been described in the present embodiment. It is optional without being limited to the configuration. 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 also the opening and closing of the window glass in the power window opened and closed by the motor, such as the window glass of the rear door. It goes without saying that the present invention can be widely applied to position detection.

[0081]

According to the present invention as described above, according to the present invention, open
Ascending request signal or lower signal generated by operating the close switch
An apparatus for detecting entrapment of foreign matter in a power window that opens and closes a window glass by a motor that rotates in response to a descending request signal , comprising: a pulse signal output unit that outputs a pulse signal synchronized with rotation of the motor; elapsed time from the output means outputs the latest pulse signal, before
Reference of the pulse signal output by the pulse signal output means
It is determined whether or not a reference elapsed time longer than a predetermined cycle, which is a cycle, has been reached, from the generation of the ascent request signal, by the rotation of the motor.
Until a predetermined time elapses until the rolling stabilizes.
In this configuration, an elapsed time determination unit is provided for determining whether or not a foreign object is caught based on the determination result of the elapsed time determination unit. For this reason, the time elapsed since the pulse signal output unit outputs the latest pulse signal is hardly influenced by whether the rotation of the motor is stable, such as the period and frequency of the pulse signal, and the reference elapsed time. Since the elapsed time determination means determines whether or not the time has reached, it is possible to reliably detect the presence or absence of a foreign substance even when the motor is started at an unstable rotation. .

Further, according to the present invention, each time the pulse signal output means outputs the pulse signal, a calculation means for calculating the opening / closing acceleration of the window glass based on a cycle of the pulse signal; A configuration that further includes acceleration determining means for determining whether all of the opening / closing accelerations for the number of times has reached a predetermined reference opening / closing acceleration, and detects the presence or absence of a foreign object being caught based on the determination result of the acceleration determining means; did. For this reason, even if a relatively soft foreign object that does not rapidly reduce the opening / closing speed of the window glass is sandwiched, the reference opening / closing acceleration can be reliably detected by setting the reference opening / closing acceleration to a low value corresponding thereto. .

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a power window jam detection device of the present invention.

FIG. 2 is an explanatory diagram showing a schematic configuration of a partial configuration of a power window including a pinch detection device according to an embodiment of the present invention;

FIG. 3 is an explanatory diagram showing a configuration of a pulse signal generator of FIG. 2;

FIG. 4 is an explanatory diagram of a pulse signal output by first and second sensors of the pulse signal generator of FIG. 3;

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

FIG. 6 is a memory area map of a RAM of the microcomputer shown in FIG. 2;

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. 2;

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.

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. 2;

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. 2;

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

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

FIG. 13 is an explanatory diagram showing a boundary position between the fully closed area of the window glass and the pinch detection area shown in FIG. 2;

[Explanation of symbols]

3 Entrapment detection device 11 Motor 15 Microcomputer 15a CPU 15b RAM 15c ROM 15A Elapsed time determination means 15B Calculation means 15C Acceleration determination means 15D Period determination means 15E Second acceleration determination means 31A Pulse signal output means 51 Window glass _{An to An - (X-1)} windowpane lifting deceleration (open acceleration) A _HI threshold (second reference-off acceleration) A _LO threshold (reference closing acceleration) Ta second elapsed time Tb third elapsed time T _E pinching confirmation time (reference Elapsed time) PA pulse signal Wa _n , Wb _n pulse signal period W _REF reference period (predetermined period)

Continued on the front page (72) Inventor Takeshi Omiyama 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Tadashi Tadashi Tadashi 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Examiner at Saki Parts Co., Ltd. Tadao Yamada (56) References JP-A-5-321530 (JP, A) JP-A-5-96372 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) E05F 15/10-15/20 B60J 1/17

Claims (5)

(57) [Claims] (1) It is generated when an open / close switch is operated.
An apparatus for detecting pinching of a foreign object in a power window that opens and closes a window glass by a motor that rotates in response to an ascending request signal or a descending request signal, and a pulse signal output unit that outputs a pulse signal synchronized with rotation of the motor. The time elapsed since the pulse signal output unit outputs the latest pulse signal is output by the pulse signal output unit.
The generation of the rising request signal is performed by determining whether or not a reference elapsed time longer than a predetermined period that is a reference period of the pulse signal has been reached.
From the time until the rotation of the motor stabilizes
A power window entrapment detecting device, comprising: an elapse time estimating means for judging until a predetermined time elapses, and detecting the presence or absence of foreign object entrapment based on the judgment result of the elapse time estimating means. . 2. A calculating means for calculating the opening / closing acceleration of the window glass based on a cycle of the pulse signal each time the pulse signal outputting means outputs the pulse signal, and a predetermined number of times of the opening / closing acceleration in the past. Are all further provided with acceleration determining means for determining whether or not a predetermined reference opening / closing acceleration has been reached,
2. The power window entrapment detection device according to claim 1, wherein the presence or absence of entrapment of a foreign object is detected based on a result of the judgment by the acceleration determination means. Wherein further comprising a period determining means for determining whether the period of the pulse signal the pulse signal output means outputs reaches the plants periodic, foreign matter on the basis of the determination result of the periodic determination means 3. The pinching detection device for a power window according to claim 2, which detects the presence or absence of pinching of the power window. 4. The apparatus according to claim 1, further comprising: a second acceleration determining unit configured to determine whether the opening / closing acceleration has reached a second reference opening / closing acceleration exceeding the reference opening / closing acceleration, based on a determination result of the second acceleration determining unit. 4. The power window pinch detection device according to claim 2, wherein the presence or absence of a pinch of foreign matter is detected. 5. A plurality of sets of said pulse signal output means,
5. The power window pinching detection device according to claim 1, wherein the presence or absence of pinching of a foreign object is detected based on a determination result of the pulse signal output by each pulse signal output unit.