JP2002256766A - Pinch detecting device for window glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pinch detecting device for a window glass capable of easily preventing erroneous pinch detection based on the difference of the sliding resistance in the moving range of the window glass while maintaining high- precision pinch detection. SOLUTION: The moving range of the window glass is uniformly split into split areas. When pinches are continuously detected twice in the same split area at the closing operation of the window glass (Yes at S105), an arithmetic section changes the threshold coefficient used for the pinch judgment of the prescribed area including the split area from a normal threshold coefficient to a special threshold coefficient (S106). Since the special threshold coefficient is used for the pinch judgment in the split area having large sliding resistance, erroneous pinch detection is prevented. The normal threshold coefficient is used for the pinch judgment in other split areas on the other hand, and high- precision pinch detection can be maintained.

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 the presence or absence of a window glass.

[0002]

2. Description of the Related Art Conventionally, some vehicles have a power window device for raising and lowering a window glass by a driving force of a motor or the like. In this power window device, a motor is driven by operating a switch provided on each door to raise and lower the window glass.

[0003] By the way, many of such power window devices have a function of preventing pinching. More specifically, the pinch prevention function is controlled when, for example, a foreign object is caught between the window glass and the window frame while the window glass is performing the closing operation, and further closing operation cannot be performed. The circuit detects the jam. Then, the window glass is operated in the opening direction, which is the opposite direction, to release the caught foreign matter.

[0004] For example, there is a pulse detection method for detecting that this foreign matter is caught. The pulse detection method is performed by detecting a rotation speed of a motor that opens and closes a window glass and generating a pulse signal having a period proportional to the detected speed. The control circuit detects the pinch by comparing the fluctuation of the pulse period (rotational speed of the motor) with a threshold value.

[0005]

By the way, in the above-mentioned prior art, the load applied to the window glass is not constant within a range from the fully opened position to the fully closed position. In particular, in the case of improper installation of the door or the like, an overload is applied to the window glass at a specific place. As a result, even though no foreign matter is sandwiched, the pulse cycle fluctuation exceeds the threshold value, and the control circuit detects the jamming and inverts the window glass. In this case, since the place where an overload is applied is at the same position, there is a possibility that the window glass performing the closing operation cannot be completely closed by repeatedly performing the reversing operation at the same place.

Therefore, it is conceivable to set a large threshold value with a sufficient margin in advance so as not to be erroneously inverted even when an adverse effect such as a defective door installation is caused. However, if such a large threshold value is set in advance, the detection of the pinch will be delayed, and the load applied to the pinched object until the pinch is determined by the control circuit and the reversing operation is performed will be reduced. The problem that it becomes large arises.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to maintain a high-precision pinch detection, and to make use of a difference in sliding resistance within a moving range of a window glass. It is an object of the present invention to provide a window glass sandwiching detection device which can easily prevent erroneous detection of the sandwiching.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is a method for determining whether or not a pulse generated according to rotation of a motor is pinched by a window glass. A detecting means for determining whether or not a threshold value is exceeded; and a drive control means for reversing the drive of the window glass driving motor based on the determination result of the determining means. The moving range is divided into a plurality of divided areas, and when one or more divided areas are detected by the determination means a plurality of times, a predetermined area including the divided area detected as being sandwiched is detected. A first change unit configured to perform a threshold change process on a threshold value of the area to a threshold value larger than a threshold value when the pinch is detected a plurality of times; After the in the given area, and summarized in that a determination is sandwiched by the window glass at the threshold after changing the threshold.

According to a second aspect of the present invention, in the first aspect, the threshold value changing process by the first changing means is performed when the determination means detects a continuous pinch in the closing operation of the window glass. The gist is to be

According to a third aspect of the present invention, in accordance with the first or second aspect, a pulse detected in the same divided area with respect to a divided area in a predetermined area in which the changed threshold value is set. When the relationship between the amount of change and the threshold value before the change satisfies the predetermined condition a plurality of times, a second change unit that returns the threshold value in the divided area to the threshold value before the change again is further provided. .

According to a fourth aspect of the present invention, in the third aspect, the return processing by the second changing means is such that the relationship between the amount of change of the pulse detected in the same divided area and the first threshold is continuous. The gist is to be performed when predetermined conditions are satisfied.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the divided area is located at a reference position over a moving range of the window glass from a fully open position to a fully closed position. The point is that the partition is made based on the pulse count value from.

(Operation) According to the first aspect of the present invention,
Alternatively, when a plurality of sandwiches are detected in a plurality of divided areas, the threshold value of the predetermined area including the divided area is larger than a threshold value when the plurality of sandwiches are detected by the first changing unit. The threshold value is changed. Then, after the pinching is detected a plurality of times, the pinching is determined in the predetermined area by the threshold value after the threshold value is changed. For this reason, in a region where the sliding resistance is large within the moving range of the window glass, the threshold value after the threshold value change process is performed in the pinching determination is used on condition that the pinching is detected a plurality of times. Erroneous detection is eliminated. On the other hand, in a portion where the sliding resistance is not large within the moving range of the window glass, since the threshold value changing process is not performed,
Highly accurate pinch detection is maintained.

According to the second aspect of the present invention, the threshold changing process is performed by the first changing unit when the judging unit judges that the sheet is continuously pinched, so that the reliability of the threshold changing process is improved. According to the third aspect of the present invention, in the predetermined area in which the changed threshold value is set, the relationship between the change amount of the pulse detected in the same divided area and the threshold value before the change satisfies the predetermined condition a plurality of times. In this case, the threshold value is returned to the threshold value before the change by the second changing unit again. For this reason, in the divided area constituting the predetermined area, in the divided area which does not need to be determined by being sandwiched by the large threshold value after the change, the determination is made again by the threshold value before the change, and a more accurate sandwich detection is performed. Is achieved.

According to the fourth aspect of the present invention, when the relationship between the change amount of the pulse continuously detected in the same divided area and the threshold value before the change meets the predetermined condition, Since the return process is performed by the second changing unit, the reliability of the return process is improved.

According to the fifth aspect of the present invention, the divided area is divided based on the pulse count value from the reference position over the moving range of the window glass from the fully open position to the fully closed position. Therefore, the division of the divided area can be easily realized.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment in which the present invention is embodied in a power window device for a side door of a vehicle.
3 will be described with reference to FIG.

FIG. 1 is a block diagram showing the electrical configuration of the power window device. FIG. 2 is a side view showing a side door of the vehicle. In FIG. 1, a controller 11 as a drive control unit, a determination unit, a first change unit, and a second change unit includes an operation unit 12, a storage unit 13, and a counter unit 1.
4 is provided. The calculation unit 12 performs various calculations. Further, the storage unit 13 includes a rewritable memory unit (RAM) that stores a calculation result and the like by the calculation unit 12,
It has a read-only memory unit (ROM) for storing various control programs and an electrically writable / erasable nonvolatile memory unit (EEPROM). The counter unit 14 includes a pulse counter that counts pulses input to the controller 11, an inversion counter that counts the number of times a pinch is detected by the calculation unit 12, and a release that counts a number that satisfies a predetermined condition regarding the inversion margin described later. Counter.

A power window switch 15 as a window switch including a down switch, an up switch, and an automatic operation switch (auto switch) includes an input circuit 1
6 is connected to the controller 11. The power window switch 15 is provided on the inner surface of the door 17. In addition, the window frame 17a of the door 17 in FIG. 2 is exaggeratedly drawn vertically long for convenience of explanation.

The raising switch is a window glass 18
Is a switch for operating in a direction in which the window glass 18 is closed (upward), and a down switch is a switch for operating in a direction in which the window glass 18 is opened (downward). Both switches are two-stage click type and selectively switch the swinging power window switch 15, that is, by pressing one end side (down side) or the other end side (up side) by one step, to turn on / off. It is turned off.

The auto switch fully opens the window glass 18 based on an operation of pressing the down side or the up side of the power window switch 15 by two steps.
This is a switch for operating in a fully closed state.

On the other hand, a drive motor 19 as a window glass drive motor for raising or lowering the window glass 18 is composed of a DC motor, and is connected to the controller 11 via a drive / switching circuit 20 as a drive circuit. Have been. The drive / switching circuit 2
0 switches the circuit for supplying or stopping the drive power to the drive motor 19 and for performing the normal rotation or the inversion based on the drive control signal from the controller 11. That is, in response to the drive control signal from the controller 11 based on the up / down signal, which is the operation signal of the up / down switch, the drive / switch circuit 20 drives the drive motor 19 to raise or lower the window glass 18. It has become.

In the vicinity of the drive motor 19, a pulse sensor 22 is provided. The pulse sensor 22 is connected to the controller 11 via an input circuit 23, and outputs a pulse signal (hereinafter, simply referred to as “pulse”) to the controller 11 according to the driving (rotation) of the driving motor 19. ing. Then, based on the length of the pulse period proportional to the rotation speed of the drive motor 19, the controller 11 detects that the window glass 18 has been caught.

The pulse counter of the counter section 14 counts inputted pulses. In the present embodiment, the count-up is performed when the window glass 18 is lowered, and the count-down is performed when the window glass 18 is raised. The count number counted by the pulse counter is stored in the RAM when the drive motor 19 is being driven and stopped, and when the ignition switch (not shown) is turned off, the RAM stores the count value in the storage unit 13. The data of the current position of the window glass is stored in the EEPROM. When the ignition switch is turned on, the data is written from the EEPROM to a specific storage area of the RAM.

On the other hand, the ROM of the storage unit 13 stores pulse count values (pulse count values from the reference position) corresponding to the fully closed and fully opened positions of the window glass 18 in advance. Hereinafter, the pulse count value may be referred to as position data. Here, the pulse count value is
This is a cumulative value corresponding to the number of pulses counted by the pulse counter, and is determined in advance by experimentation by counting up to the fully open position with the fully closed position as a reference position.

At the same time, the ROM stores pulse count values (position data) from the reference position at regular intervals over the window glass moving range from the fully closed position to the fully opened position. The moving range of the window glass 18 is divided into a plurality of equal divided areas b as shown in FIG. 2 based on the pulse count values stored at the constant intervals. The controller 11 determines the number of pulses input from the pulse sensor 22 and
By comparing with the pulse count value (position data for specifying the divided area) stored in M, it is possible to determine in which divided area b the window glass 18 is located.

The controller 11 compares the pulse count value from the pulse sensor 22 with the pulse count value of the fully closed or fully opened position stored in the ROM, so that the window glass 18 is fully closed or fully closed. It can be determined that this is the fully open position. Then, the controller 11 controls the driving of the motor according to the result.

Next, the threshold changing process in this embodiment will be described with reference to the flowchart shown in FIG. This flowchart shows the processing executed by the calculation unit 12.

This flowchart starts when an up signal is input, and stops when no up signal is input. When the input of this up signal disappears, for example,
This is the case when the window glass is located at the fully closed position, when the ignition switch is turned off, and the like.

When an up signal as an operation signal is input from the power window switch 15 to the controller 11,
The controller 11 outputs a drive control signal to the drive / switching circuit 20. Then, the drive / switching circuit 20 drives the drive motor 19 based on the signal, and raises the window glass 18. Then, based on the rotation of the drive motor 19, the pulse sensor 22 generates a pulse having a cycle proportional to the rotation speed and outputs the pulse to the controller 11. As a result, the controller 11 starts acquiring a pulse which is data for comparison with the threshold value P0S. At the same time, in the pulse counter of the counter section 14, R
The count number stored in the specific storage area of the AM is read, and counting is started from the count number.

In step (hereinafter abbreviated as "S") 100, the number of pulses counted by the pulse counter is compared with the pulse count value (position data) stored in the ROM. And
Thus, it is determined at which divided area b the window glass 18 is currently located, and the process proceeds to S101. Here, the processing after S101, which is the processing after the division area b is determined, is performed independently for each division area b, that is, the integration determination prohibition flag, the inversion counter, and the release The counter is independent for each area.

In step S101, an integration determination prohibition flag corresponding to the determined divided area (for example, b1) is read, and it is determined whether the integration determination prohibition flag is "1". The integral determination prohibition flag is used to determine whether the pinch determination is performed using the normal threshold coefficient A1 or the special threshold coefficient A2 (A1 <A2) in the pinch detection processing described later. The integration determination prohibition flag prepared for each divided area b is set or cleared for each divided area b.

When the integral judgment prohibition flag is cleared to "0", the normal threshold coefficient A1 is selected, and the detection processing (hereinafter, referred to as "the normal threshold P0S1") is sandwiched by the threshold for reversing under a low load. , "Integration determination").
On the other hand, when the integration determination prohibition flag is set to “1”, the special threshold coefficient A2 is selected, and the pinch detection process (hereinafter, referred to as “the special threshold P0S2”) is carried out by the threshold for reversing under a high load. Absolute value determination) is performed. As a result, the detection is performed by sandwiching the integral judgment with higher sensitivity than the absolute value judgment. The initial value of the integral determination prohibition flag in each divided area b is cleared to “0”.

If the integral judgment prohibition flag is "0" (S101: YES), the routine proceeds to S102 and shifts to an integral judgment routine. Then, an integration determination is performed to determine whether or not a pinch has occurred.

Here, the integration judgment in S102 will be described in detail. In the present embodiment, a pulse detection method is used as the pinch detection process, and is based on a pulse signal generated by the pulse sensor 22 and having a cycle proportional to the rotation speed of the drive motor 19. Generally, when the rotation speed of the motor 19 is high, the pulse period is short, and when the rotation speed is low, the pulse period is long, and the fluctuation of the pulse period is used.

That is, when the drive motor 19 is performing the closing operation in the direction to close the window glass 18 at a constant rotation speed, the pulse period outputted at each time becomes constant. Then, the pulse period T0 of the actual pulse just output is
And the pulse periods T1 to TN-1 of each pulse up to N-1 before the currently output pulse are summed, and the sum is divided by N. That is, the average pulse period P0 (= [T
0 + T1 +... + TN-1] / N). Then
If the pulse period T0 is always constant, the average pulse period P0
Is also constant.

Then, a value obtained by multiplying the average pulse period P0 obtained at each time by a predetermined threshold coefficient A is obtained as a threshold value P0S (= A × P0). This threshold value P0S is a reference value for determining whether or not the sheet is pinched at each time. Note that a threshold coefficient A related to the threshold value P0S
With respect to, the normal threshold coefficient A1 for integration determination is stored in the ROM of the storage unit 13 in advance. Hereinafter, the threshold value P0S using the normal threshold coefficient A1 is referred to as a normal threshold value P0S1. In the present embodiment, the normal threshold value P0S1 corresponds to the "threshold value before change".

Then, the pulse period T0 obtained at that time is compared with the normal threshold value P0S1. as a result,
When the actual pulse period T0 is larger than the normal threshold value P0S1 (T0> P0S1), the arithmetic unit 12 determines that something is caught. Conversely, when the actual pulse period T0 at that time is equal to or smaller than the normal threshold value P0S1 (P0S1 ≧ T0), the calculation unit 12 determines that nothing is sandwiched.

Then, as described above, the pulse period T0
Does not exceed the normal threshold value P0S1 (S102
Is NO), the inversion counter of the counter unit 14 for counting the number of times of pinch detection is cleared (S103), and S
Return to 100. Then, the next pulse is obtained. The inversion counter prepared for each divided area b is counted or cleared for each divided area b.

On the other hand, in S102, when the pulse period T0 exceeds the normal threshold value P0S1 and a pinch is detected (YES in S102), the process proceeds to S104. Then, the inversion counter of the counter unit 14 increments the count value of the number of times of pinch detection by one, and stores the count value of the inversion counter in the RAM of the storage unit 13. At this time,
The calculation unit 12 also stores the current pulse count number in the storage unit 13
Of the divided area b1 of the window glass 18 when the pinch is detected.

Next, based on the count value of the number of times of pinch detection and the count number of pulses stored in the RAM, while the closing operation of the window glass 18 is performed many times, the pinch is held in the same divided area b1. It is determined whether the detection has been performed twice consecutively (S105).

If the pinch detection is still one time (S105
Is NO), and the process proceeds to S108 described later. On the other hand, when the detection is performed twice consecutively in the same divided area b1, the process proceeds to S106. Then, in S106, the divided area b1 and a plurality of divided areas b2 and b3 adjacent to the same divided area b1 (that is, the predetermined area k).
Is set to "1".
Thereafter, the inversion counter is cleared (S107), and S10
Proceed to 8.

In S108, a control signal is output from the arithmetic section 12 to the drive / switching circuit 20, and the window glass 18 is inverted (operation in the opening direction) to perform the inversion control of the window glass 18.
Return to When the integral determination prohibition flag is set to “1”, the calculation unit 12 performs the pinch determination using the special threshold coefficient A2 instead of the normal threshold coefficient A1, and thus, in the present embodiment, S106 is performed in the threshold change processing. Is equivalent to

When the integral judgment prohibition flag is "1" in S101, the integral judgment for performing the detection processing by being pinched by the normal threshold coefficient A1 is prohibited (S109), and the routine shifts to the absolute value judgment routine. I do.

Then, the arithmetic section 12 makes an absolute value determination in S110, and determines whether or not a pinch has occurred.
Here, the absolute value determination in S110 will be described in detail. In the processing of S110, the same processing is performed except for the integration determination and the threshold coefficient A in S102, which have already been described. Therefore, the overlapping description will be omitted, and only different points will be described.

As the threshold coefficient A relating to the threshold value P0S, a special threshold coefficient A2 larger than the normal threshold coefficient A1 is stored in the ROM of the storage unit 13 in advance. Hereinafter, the special threshold coefficient A
The threshold value P0S using 2 is called a special threshold value P0S2. And
The arithmetic unit 12 calculates a special threshold value P0S2 (= A2 × P0) by multiplying the special threshold coefficient A2 by the average pulse period P0, and makes a judgment of pinching by comparing the magnitude relationship with the pulse period T0. In the present embodiment, the special threshold P
0S2 corresponds to the “threshold value after change”.

If the pulse period T0 exceeds the special threshold value P0S2 (P0S2 <T0, S110 is YES), it is determined that a pinch has been detected, and the flow shifts to S108 to control the inversion of the window glass 18. On the other hand, if the pulse period T0 does not exceed the special threshold value P0S2, (P0S2 ≧ T0,
(S110 is NO), and the process proceeds to S111.

Then, in the divided area (for example, b3) corresponding to the current pulse count, whether or not the special threshold coefficient A2 for performing the pinch determination is returned to the normal threshold coefficient A1, in other words, the integration determination The reversal margin Y is calculated to determine whether the prohibition flag is cleared to “0”. The reversal margin Y is calculated by the following equation (α).

Inversion margin Y = Pulse period change amount D / normal threshold value P0S1 (= A1 × P0) (α) Pulse period change amount D = | Pulse period T0 of actual pulse input this time−Average pulse period P0 In a portion where the window glass 18 is overloaded from the outside and the sliding resistance is large, the rotation speed of the drive motor 19 becomes slow, so that the pulse period T0 is longer than the average pulse period P0. Therefore, in the predetermined area k in which the integral determination prohibition flag is set to 1 in S106, the pulse period change amount D is set to the normal threshold value P0S in a portion where the sliding resistance is large.
When divided by 1 (= A1 × P0), it generally becomes larger than a predetermined value (0.5 in the present embodiment). On the other hand, at a portion where the window glass 18 is not overloaded from the outside, the value is equal to or less than the predetermined value.

Therefore, in S111, the inversion margin Y
However, if Y> 0.5 (NO in S111), the special threshold P0S2 (special threshold coefficient A2) in the divided area b3
The calculation unit 12 determines that it is not a problem to make a judgment of being sandwiched between the two. Then, the release counter of the counter unit 14 for counting the number of times when the margin Y is 0.5 or less is cleared (S112), and the process returns to S100. The release counter prepared for each divided area b is counted or cleared for each divided area b.

On the other hand, if the reversal margin Y is Y ≦ 0.5 (YES in S111), the flow proceeds to S113. Then, the release counter of the counter unit 14 increments the count value of the number where the reversal margin Y is 0.5 or less by one. The calculation unit 12 stores the count value of the cancellation counter in the RAM of the storage unit 13. At the same time, the count number of the current pulse is also stored in the RAM so that the divided area b3 where the window glass 18 is located can be determined (S1).
13). In this embodiment, the reversal margin Y ≦
0.5 corresponds to the predetermined condition.

Next, based on the count value of the canceling counter and the pulse count stored in the RAM, whether the pulse reversal margin Y is less than 0.5 in the same divided area b3 twice consecutively. Is determined (S
114).

If the determination of the reversal margin Y of 0.5 or less is still one time (S114: NO), the process returns to S100. On the other hand, the pulse inversion margin Y in the same divided area b3
Is 0.5 or less twice consecutively,
No. 2 judges that it is not necessary to make a judgment by being pinched by the special threshold value P0S2, and proceeds to S115. Then, in S115, the integral determination prohibition flag in the divided area b3 is cleared to "0", and the process returns to S100. At this time, the predetermined area k in which the integration determination prohibition flag is set to “1” in S106.
Of the divided areas other than the divided area b3 for which the flag has been cleared to "0" in S115, the integration determination prohibition flag remains "1". When the integral determination prohibition flag is cleared to “0”, the operation unit 12 performs the integral determination again (normally, the pinch determination using the threshold value coefficient A1).
Reference numeral 15 corresponds to a return process.

By the way, while a pulse is repeatedly input to the controller 11 by an interrupt process different from the above-mentioned flowchart, the arithmetic unit 12 determines that the current pulse counter value is the pulse count value corresponding to the fully closed position. (Position data). And
When the pulse count value (position data) corresponding to the fully closed position matches the count number of the pulse counter, the routine of this flowchart ends. After the inversion control is performed by the process of S108, the arithmetic unit 12 determines whether the current count of the pulse counter for the window glass 18 matches the pulse count value (position data) corresponding to the fully open position. Is determined by another interrupt processing. When the pulse count value (position data) corresponding to the fully open position matches the count number of the pulse counter, the routine of the flowchart is terminated.

Therefore, according to the above embodiment, the following effects can be obtained. (1) In the above embodiment, in the same divided area b1,
When sandwiching is detected twice consecutively, the integral determination prohibition flags in the divided area b1 and a plurality of divided areas b2 and b3 adjacent to the divided area b1 are set to “1”. Then, the pinch determination in the predetermined area k is performed using the special threshold coefficient A2 which is larger than the normal threshold coefficient A1. Therefore, the window glass 1
In the movement range of No. 8, at a portion where the sliding resistance is large due to the influence of the improper installation of the door 17 or the like, the special threshold value POS2
In this case, erroneous detection of the pinch does not occur unlike the related art.

(2) In the above embodiment, when two consecutive pinchings are detected in the same divided area b, the threshold coefficient A used for pinching determination is changed from the normal threshold coefficient A1 to the special threshold coefficient A2. Change to For this reason, the reliability of the threshold (threshold coefficient) change can be improved as compared with the case where the threshold (threshold coefficient) change is performed by one pinch detection.

(3) In the above embodiment, the special threshold coefficient A
The predetermined area k in which the pinch determination is performed using 2 is
Not all within the range of movement of the window glass 18, but 2
The divided area b1 in which the pinching is consecutively detected and a plurality of divided areas b2 adjacent to the divided area b1
b3 (that is, the predetermined area k). For this reason, pinch detection with higher accuracy can be realized as compared with the case where the special threshold value POS2 is used in the entire moving range of the window glass 18.

(4) In the above embodiment, the special threshold coefficient A
In the predetermined area k for performing the pinch determination using the pulse width 2, the inversion margin Y calculated from the pulse cycle change amount D detected in the same divided area b3 and the normal threshold value P0S1 is determined for two consecutive pulses. If the value is less than (0.5),
Clears the integral determination prohibition flag to “0”. Then, in the divided area b3, the pinch determination is performed again using the normal threshold coefficient A1. Therefore, it is possible to narrow down the divided area b in which the special threshold coefficient A2 is to be used for the once set predetermined area k, and realize more accurate pinch detection.

(5) In the above embodiment, when the inversion margin Y is equal to or less than the predetermined value (0.5) for two consecutive pulses in the same divided area b3, it is determined that the inversion margin Y is sandwiched. The special threshold coefficient A2 used for
Is performed. Therefore, one reversal margin Y ≦
With a value of 0.5, the reliability can be improved as compared with the case where the return processing is performed.

(6) In the above embodiment, in order to form the divided area, the pulse count value from the reference position is stored in the ROM at regular intervals over the moving range of the window glass from the fully closed position to the fully opened position. did. Therefore, by comparing the pulse count value from the pulse sensor 22 with the pulse count value, the window glass 1
8 can be easily determined.

The above embodiment may be modified as follows. In the above-described embodiment, in S105, it is determined whether the continuous pinch detection has occurred in the same divided area b1. However, the split area b1 in which the pinch detection is performed first is performed.
The area determined as a plurality of divided areas adjacent to the same divided area b1 may be expanded. With this configuration, it is possible to determine whether or not the threshold value changing process can be performed over a wide range, so that the threshold value changing process can be performed with high accuracy. Also, in this case, the enlarged area is designated as a special threshold coefficient A
2 may be the same range as the predetermined area k used, or may be a range smaller than the predetermined area k.

In the above-described embodiment, the threshold value (threshold coefficient A) changing process in S106 is performed when two consecutive sandwiches are detected in the same divided area b.
The number of times of pinch detection is not limited to two, but three, four.
The number of times may be appropriately increased. Even if they are not continuous, a threshold (threshold coefficient A) changing process may be performed when a plurality of sandwiches are detected in the same divided area b.

In the above embodiment, the threshold value (threshold coefficient A) return process in S115 is performed when the inversion margin Y is equal to or less than the predetermined value (0.5) twice in the same divided area b. , But without being limited to two
The number may be increased as appropriate, such as three times or four times. Further, even if they are not continuous, the reversal margin Y is set to 0.times.
When the difference is equal to or less than 5, the threshold value (threshold coefficient A) may be returned. Further, the determination value of the reversal margin Y is not limited to 0.5, but may be changed as appropriate.

In the above embodiment, the present invention is embodied in the power window device for the side door of the vehicle, but may be embodied in a slide roof device including an electric slide roof provided on the ceiling surface of the vehicle. Even if you do this,
INDUSTRIAL APPLICABILITY The present invention is effectively used for a slide roof in which foreign matter may be trapped. In this case, the slide roof corresponds to a window glass.

In the above embodiment, the threshold value (threshold coefficient A)
Is performed when the reversal margin Y is less than or equal to the predetermined value twice consecutively in the same divided area b during the closing operation of the window glass 18, but is changed as follows. Is also good. That is, when the down switch of the power window switch 15 is pressed during the closing operation of the window glass 18 and a down signal is input to the controller 11, the arithmetic unit 12 in the controller 11 performs a process of returning the threshold (threshold coefficient A). Do. Then, in the same process, the normal threshold coefficient A is again applied to the entire predetermined area set to perform the pinch determination using the special threshold coefficient A2.
1 is used to make a judgment of pinching. By doing so, the return processing can be easily performed when desired, which is particularly effective at the experimental stage in a factory or the like.

In the above embodiment, the divided area b is divided equally in the moving range of the window glass 18, but may not be uniform. In the above embodiment, the special threshold coefficient A2 is stored in the ROM in advance, but may be changed over time.
That is, in the case where the pinch detection is performed in S102,
From the pulse period T0 at that time and the average pulse period P0, a situation-dependent threshold coefficient A3 ((n × T0) / P0, where n is a constant) is calculated. Then, using the same threshold coefficient A3, S
A pinch determination at 110 is performed. If you do this,
A threshold can be set according to the situation of each vehicle.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects. (1) In the window glass pinch detection device according to any one of (1) to (5), the operation means may be used while the window glass is moving within a predetermined area in which the changed threshold is set. When a predetermined operation is performed, the window glass pinching presence / absence detection device further includes third changing means for returning the threshold value of the predetermined area to the threshold value before the change again. In this way, the return processing can be easily performed. In the above embodiment, the third changing means corresponds to the controller 11, and the operating means corresponds to the power window switch 15. Further, the predetermined operation is pressing of a down switch.

[0068]

As described above in detail, according to the first aspect of the present invention, it is possible to maintain a high-precision pinch detection, and to detect a pinch based on a difference in sliding resistance within the moving range of the window glass. False detection can be easily prevented.

According to the second aspect of the present invention, the threshold changing process is performed by the first changing unit when the judging unit continuously judges the pinching, so that the reliability of the threshold changing process can be improved. it can.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the area in which the second threshold is to be used in the divided areas constituting the predetermined area is reduced by the return processing. And more accurate pinch detection can be realized.

According to the invention of claim 4, in addition to the effect of the invention of claim 3, in addition to the effect of the invention, the relationship between the change amount of the pulse continuously detected in the same divided area and the first threshold value is determined by the determination means. When the predetermined condition is continuously satisfied, the return process is performed by the second changing unit, so that the reliability of the return process can be improved.

According to the fifth aspect of the present invention, in addition to the effects of any one of the first to fourth aspects of the present invention, in addition to the effects of the first to fourth aspects, a reference is provided over the window glass moving range from the fully open position to the fully closed position. Based on the pulse count value from the position, the division of the divided area can be easily realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a power window device according to an embodiment.

FIG. 2 is a side view showing a door of the vehicle.

FIG. 3 is a flowchart showing a pinch determination and threshold value change process.

[Explanation of symbols]

b: divided area, k: predetermined area, 11: controller (determination means, drive control means, first change means, second change means), 18: window glass, 19: drive motor (window glass drive motor).

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Eiji Takasu, Inventor 3-260 Toyota, Oguchi-cho, Niwa-gun, Aichi Prefecture Inside Tokai Rika Electric Works, Ltd. (72) Yasuhiro Shimomura 3-260 Toyota, Oguchi-machi, Oguchi-machi, Niwa, Aichi Prefecture Inside the Tokai Rika Electric Works, Ltd. (72) Inventor Yukihiko Umeda 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 2E052 AA09 BA02 CA06 EA14 EB01 EC01 GA10 GB06 GC06 GD03 HA01 3D127 AA02 CC05 DF04 DF35

Claims (5)

[Claims] A determining means for determining whether or not a pulse generated in accordance with rotation of the motor exceeds a threshold value for determining whether or not the motor is pinched by a window glass; A window glass pinching presence / absence detection device comprising: a drive control unit for reversing the drive of the window glass driving motor; wherein the moving range of the window glass is divided into a plurality of divided areas and divided into one or a plurality of divided areas. In the case where the determination unit detects the sandwiching a plurality of times, the threshold value of a predetermined area including the divided area where the sandwiching is detected is changed to a threshold value larger than the threshold value when the sandwiching is detected a plurality of times. A first change unit that changes the threshold value in the predetermined area after the detection of the plurality of times of being caught in the predetermined area. Presence detection device jamming of the window glass, characterized in that a determination is sandwiched by the scan. 2. The threshold changing process by the first changing unit, wherein the determining unit is configured to perform a
2. The detection device according to claim 1, wherein the detection is performed when a continuous pinch is detected. 3. A relation between a change amount of a pulse detected in the same divided area and a threshold value before the change for a divided area in the predetermined area in which the changed threshold value is set, is determined a plurality of times by a predetermined condition. 3. A detection method according to claim 1, further comprising a second changing unit for returning the threshold value in the divided area to the threshold value before the change when the condition is satisfied. apparatus. 4. The return process by the second changing means is performed when a relationship between a change amount of a pulse detected in the same divided area and a threshold value before change continuously satisfies a predetermined condition. Item 4. The window glass sandwiching detection device according to Item 3. 5. The divided area is divided on the basis of a pulse count value from a reference position over a moving range of the window glass from a fully open position to a fully closed position. Item 5. The device for pinching a window glass according to any one of Item 4.