JP2005023701A - Device and unit for detecting presence or absence of pinching by window glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for detecting the presence or absence of pinching by window glass, which can enhance the accuracy of the detection of the presence or absence of the pinching. <P>SOLUTION: A microcomputer 31, which is provided in a first power window apparatus 13, determines the periodic difference sum of the presence or absence of the pinching by the window glass in accordance with a variation of a rotational speed of a window motor for bringing about the opening/closing operation of the window glass, and determines the presence or absence of the pinching by comparing the periodic difference sum with a preset pinching determination threshold. The microcomputer 31 inputs threshold correction signals S1-S6 which are output from a communication main ECU 12 and second-fourth power window apparatuses 14-16, and corrects the pinching determination threshold in accordance with the threshold correction signals S1-S6. The microcomputer 31 detects the presence or absence of the pinching by the window glass while preconsidering that power supply voltage +B of a battery is decreased by the driving of other equipment, except the apparatus 13, of a vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wind glass pinching presence / absence detection device and a window glass pinching presence / absence detection unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a power window device in which, for example, a wind motor is driven by operating a wind switch provided on each side door of an automobile, and the window glass is moved up and down by the driving force of the wind motor. Some of such power window devices have a function of preventing pinching. This pinching prevention function stops the window glass closing operation when a foreign object such as a finger is caught between the window glass and the window frame during the window glass closing operation, and then opens the window glass. This is a function to release foreign matter by operating.
[0003]
For example, a voltage detection method (see Patent Document 1) is used as the detection method of the foreign object. In this voltage detection method, the detected voltage change amount and current change amount of the wind motor are respectively compared with a predetermined threshold value. When the amount is less than the threshold value and the current change amount is more than the threshold value, it is determined that pinching has occurred and the wind motor is stopped or reversed.
[0004]
[Patent Document 1]
JP 9-21274 A
[0005]
[Problems to be solved by the invention]
By the way, the power window device of Patent Document 1 has the following problems. The amount of voltage change and current change of the wind motor when a large electric load is applied to the battery, such as when the air conditioner is driven during the window glass closing operation, is greatly different from those in the sandwiching. For this reason, it is possible to identify them and to prevent pinching detection.
[0006]
However, when a plurality of devices having a small electrical load such as a car stereo or other power window device are simultaneously driven during the window glass closing operation, the voltage change amount and the current change amount of the wind motor are close to those in the sandwiching operation. For this reason, it may not be possible to identify whether the fluctuation is caused by driving or the fluctuation caused by pinching, and erroneous detection of pinching may occur.
[0007]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wind glass pinching presence / absence detection device and a wind glass pinching presence / absence detection unit capable of improving the detection accuracy of pinching presence / absence. There is to do.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is directed to a change amount of a rotation speed of a wind motor that opens and closes a windshield, or a change amount of a motor current generated by a wind motor that opens and closes a windshield, The determination target value calculating means for obtaining a determination target value for the presence / absence of pinching of the windshield based on the above, the determination target value and a predetermined pinching determination threshold value are compared, and the presence / absence of pinching is determined based on the comparison result A windshield pinching presence / absence detection device comprising: a determination unit; and a threshold correction unit that inputs an operation signal of another device and corrects the pinching determination threshold based on the operation signal. .
[0009]
According to a second aspect of the present invention, in the wind glass pinching presence / absence detecting device according to the first aspect, the threshold value correction unit compares the determination target value with the pinching determination threshold value based on the input operation signal. The gist of the present invention is to correct the pinching determination threshold value when doing so.
[0010]
According to a third aspect of the present invention, in the windshield pinching presence / absence detection device according to the first or second aspect, the threshold value correction means sets the pinching determination threshold value after a predetermined time from the correction of the pinching determination threshold value. The gist is to restore the initial value before correction.
[0011]
According to a fourth aspect of the present invention, there is provided the window glass pinching presence / absence detecting device according to any one of the first to third aspects and the operation signal output from the other device. Control means for outputting a signal to the threshold correction means, and the control means drives or stops the other device that has output the operation signal.
[0012]
(Function)
Therefore, the invention described in claim 1 has the following effects. The threshold correction means inputs an operation signal from another device, and corrects the pinch determination threshold based on the operation signal. The determination means compares the determination target value with the corrected pinching determination threshold value, and determines the presence or absence of pinching based on the comparison result.
[0013]
In the invention described in claim 2, in addition to the action of the invention described in claim 1, the following actions are obtained. The threshold correction means corrects the pinching determination threshold when comparing the determination target value and the pinching determination threshold based on the input operation signal.
[0014]
In the invention according to claim 3, in addition to the action of the invention according to claim 1 or claim 2, the following action is obtained. The threshold value correcting means returns the pinching determination threshold value to the initial value before correction after a predetermined time from the correction of the pinching determination threshold value.
[0015]
In the invention according to claim 4, in addition to the action of the invention according to any one of claims 1 to 3, the following action is obtained. The control means outputs the input operation signal to the threshold correction means. The control means drives or stops other equipment that has output the operation signal.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is embodied in, for example, a windshield pinching presence / absence detection device equipped in a power window device of a vehicle will be described with reference to FIGS.
[0017]
As shown in FIG. 1, the power window device group 11 includes a communication main ECU 12, a first power window device 13, a second power window device 14, a third power window device 15, and a fourth power window device 16 as control means. It has.
[0018]
The first to fourth power window devices 13 to 16 correspond to other devices and control means. For example, the first power window device 13 corresponds to the driver's seat, the second power window device 14 corresponds to the passenger seat, the third power window device 15 corresponds to the right rear seat, and the fourth power window device 16 corresponds to the left rear seat. The communication main ECU 12 and the first to fourth power window devices 13 to 16 are electrically connected to each other by a high-speed multiplex communication line L such as a CAN (Controller Area Network).
[0019]
The communication main ECU 12 is supplied with a power supply voltage + B from a battery. In the present embodiment, for example, three devices 21, 22, and 23 are electrically connected to the communication main ECU 12. The devices 21, 22, and 23 correspond to other devices. For example, the device 21 is an air conditioner, the device 22 is a car stereo, and the device 23 is a starter. The devices 21, 22, and 23 include power switches 21a, 22a, and 23a, respectively. Actually, the devices 21, 22, 23 and the power switches 21a, 22a, 23a are formed separately. In particular, the device (car stereo) 22 employs a main body and a power switch 21a that can be electrically connected to the main body with a lead wire.
[0020]
When the power switches 21a, 22a, and 23a are turned on, the devices 21, 22, and 23 output drive request signals K1, K2, and K3 as operation signals to the communication main ECU 12, respectively.
[0021]
As shown in FIGS. 1 and 3, when the communication main ECU 12 receives the drive request signal K (K1, K2, K3), the threshold correction signal S () corresponding to the drive request signal K (K1, K2, K3) is received. S1, S2, S3) are output to the first to fourth power window devices 13-16, respectively. The threshold correction signal S (S1, S2, S3) corresponds to an operation signal.
[0022]
The communication main ECU 12 outputs the threshold correction signal S (S1, S2, S3) to the first to fourth power window devices 13-16 based on the input of the drive request signal K (K1, K2, K3), and then drives. The power supply voltage + B is supplied (power supply) to the devices 21, 22, and 23 that output the request signal K (K1, K2, K3).
[0023]
Next, the first power window device 13 will be described in detail.
As shown in FIG. 2, the first power window device 13 includes a microcomputer 31, a window switch 32, a window motor drive circuit 33, a window motor 34, a pulse sensor 35, a full open detection limit switch Rs 1, and a full close detection. A limit switch Rs2 is provided. The microcomputer 31 corresponds to a determination target value calculation unit, a determination unit, a threshold value correction unit, and a window glass pinching presence / absence detection device. The microcomputer 31 is a detection device for detecting whether or not the window glass is sandwiched by a pulse detection method. In the present embodiment, the communication main ECU 12 and the microcomputer 31 constitute a wind glass pinching presence / absence detection unit U.
[0024]
The window switch 32 includes a closing operation switch 32a and an opening operation switch 32b.
The microcomputer 31 is electrically connected with a closing operation switch 32a, an opening operation switch 32b, a window motor drive circuit 33, a pulse sensor 35, a fully open detection limit switch Rs1, a fully closed detection limit switch Rs2, and the above-described high-speed multiplex communication line L. It is connected. A wind motor 34 is electrically connected to the wind motor drive circuit 33.
[0025]
The window switch 32 is a switch for opening and closing a window glass (not shown). For example, the window switch 32 is provided in the vicinity of a passenger in a side door of a vehicle or a passenger compartment. When the closing operation switch 32a of the window switch 32 is turned on by the driver, the closing operation switch 32a outputs a closing operation signal CLS as an operation signal to the microcomputer 31. Similarly, when the opening operation switch 32b is turned on, an opening operation signal OPN as an operation signal is output to the microcomputer 31.
[0026]
The microcomputer 31 outputs a normal rotation control signal to the window motor driving circuit 33 when the opening operation signal OPN is input from the opening operation switch 32b, and performs reverse rotation control to the wind motor driving circuit 33 when the closing operation signal CLS is input from the closing operation switch 32a. Output a signal. The microcomputer 31 outputs a stop signal to the window motor drive circuit 33 when the opening operation signal OPN and the closing operation signal CLS are not input.
[0027]
As shown in FIG. 4, the microcomputer 31 performs the following processing before outputting the normal rotation control signal or the reverse rotation control signal to the window motor drive circuit 33 based on the input of the closing operation signal CLS or the opening operation signal OPN. . The microcomputer 31 outputs a threshold correction signal S (S0) (see FIG. 1) to other power window devices (second to fourth power window devices 14 to 16) other than itself through the high-speed multiplex communication line L.
[0028]
Similarly, the microcomputers of the second to fourth power window devices 14 to 16 perform the following before outputting the normal rotation control signal or the reverse rotation control signal to the window motor driving circuit based on the input of the closing operation signal or the opening operation signal. Perform the process. The microcomputer outputs a threshold correction signal S (S4, S5, S6) to a power window device other than itself.
[0029]
The threshold correction signals S1, S2, S3, S4, S5, and S6 include correction value information H1, H2, H3, H4, H5, and H6 (numerical values) having different values.
[0030]
As shown in FIG. 2, when the wind motor drive circuit 33 receives a normal rotation control signal, a reverse rotation control signal, and a stop signal from the microcomputer 31, the wind motor 34 rotates forward, reverse, and stops, respectively.
[0031]
The output shaft of the wind motor 34 is operatively connected to, for example, a wind lifting mechanism (not shown) provided on a side door of the vehicle. When the wind motor 34 rotates in the forward direction, the window glass opens (lowers) by the operation of the lifting mechanism, and when the wind motor 34 rotates in the reverse direction, it closes (up).
[0032]
The fully open detection limit switch Rs1 is turned on by the window glass when the window glass is fully opened, and outputs a fully open position signal Zk to the microcomputer 31. The microcomputer 31 outputs a stop signal to the wind motor drive circuit 33 when the fully open position signal Zk is input. The fully closed detection limit switch Rs2 is turned on by the window glass when the window glass is fully closed, and outputs a fully closed position signal Zp to the microcomputer 31. When the microcomputer 31 receives the fully closed position signal Zp, the microcomputer 31 outputs a stop signal to the window motor drive circuit 33.
[0033]
The pulse sensor 35 outputs a pulse signal corresponding to the rotation speed of the wind motor 34 to the microcomputer 31. The pulse signal generated by the pulse sensor 35 has a shorter pulse cycle as the rotation speed of the wind motor 34 is larger, and the pulse cycle is longer as the rotation speed is smaller.
[0034]
The microcomputer 31 includes a calculation unit 36, a storage unit 37, and a timer 38.
The calculation unit 36 includes an MPU (microprocessor), and performs various calculation processes according to various control programs stored in advance in the storage unit 37. The storage unit 37 includes a ROM (read only storage device) 37a and a RAM (read / write storage device) 37b.
[0035]
The ROM 37a includes, for example, a window glass opening / closing control program, a window glass pinching prevention program, a threshold correction program, and a pinching determination threshold value P used by the window glass pinching prevention program executed by the arithmetic unit 36. The pinching determination threshold value P is obtained in advance by experimental data based on a vehicle model, a known theoretical calculation, or the like.
[0036]
Next, a description will be given of a program for preventing the sandwiching of the window glass.
The window glass pinching prevention program is a program that performs an operation of detecting whether the window glass is pinched based on the amount of change in the rotational speed of the wind motor 34. The microcomputer 31 compares the average pulse period (period difference sum ΔTs) of the pulse signal acquired within a predetermined sampling time with the sandwiching determination threshold value P, and the average pulse period (period difference sum ΔTs) is determined based on the sandwiching determination threshold value P. If it is larger, the microcomputer 31 determines that the window glass is sandwiched.
[0037]
More specifically, when the window glass is closed, when the window motor 34 rotates at a constant rotational speed, the pulse period at that time generated by the pulse sensor 35 is constant. The microcomputer 31 calculates the cycle of the pulse signal every time it detects an edge (either rising edge or falling edge) of the pulse signal input from the pulse sensor 35, and the pulse signal input at a predetermined time. The average pulse period Tave is calculated. Specifically, the microcomputer 31 sums up the current pulse period T0 and the pulse periods T1 to T (n-1) of pulses from the current pulse period T0 up to (n-1) times. An average value of the total value (Tave = {T0 + T1 +... + T (n-1)} / n) is calculated.
[0038]
Next, the pulse sensor 35 obtains a period difference value ΔT for each predetermined control period (ΔT = | T0−Tave |). That is, the pulse sensor 35 calculates the difference between the pulse period T0 of the current pulse signal and the average pulse period Tave. Then, the microcomputer 31 compares the period difference value ΔT with a preset period difference value determination threshold value ΔTh, and based on the comparison result, the fluctuation of the pulse period is caused by an impact or vibration caused by opening / closing of the door or the like. It is determined whether or not. Incidentally, the period difference value determination threshold value ΔTh is obtained in advance by an experiment using a vehicle model or a known theoretical calculation, and is stored in the ROM 37a in advance.
[0039]
If it is determined that the fluctuation of the pulse period is due to the impact or vibration caused by the opening / closing of the door, the microcomputer 31 does not detect foreign object pinching and avoids false detection of pinching To do. On the other hand, when it is determined that the fluctuation of the pulse period is not due to the impact or vibration caused by opening / closing of the door, the microcomputer 31 obtains the period difference sum ΔTs as the determination target value (that is, the determination target value calculation process). I do). Specifically, the microcomputer 31 sums up the current cycle difference value ΔT0 and the cycle difference values ΔT1 to ΔT (m−1) up to (m−1) counts from the current cycle difference value ΔT0 ( ΔTs = ΔT0 + ΔT1 +... + ΔT (m−1)).
[0040]
The microcomputer 31 compares the period difference sum ΔTs with the pinching determination threshold value P stored in advance in the ROM 37a (that is, a pinching presence / absence determination process is performed). When the period difference sum ΔTs is equal to or smaller than the pinching determination threshold value P, the microcomputer 31 determines that nothing is pinched in the window glass and maintains the driving of the wind motor 34 as it is. As a result, the window glass closing operation is continued.
[0041]
On the other hand, as shown in FIG. 8, when the period difference sum ΔTs is larger than the pinching determination threshold value P, the microcomputer 31 determines that there is pinching by the window glass and stops the wind motor 34. As a result, the movement of the window glass is stopped and further pinching is restricted. Further, the rotation may be reversed after the stop, in which case the sandwiching is released by the window glass moving in the opening direction.
[0042]
Next, the threshold correction program will be described.
This threshold value correction program is a program for preventing erroneous detection of pinching due to a decrease in the power supply voltage + B of the battery due to driving of the devices 21, 22, 23 and the power window device other than itself.
[0043]
The ROM 37a stores a correction value r (r1 to r6 in this embodiment) and a correction value addition time t (t1 to t6 in this embodiment) in advance.
The microcomputer 31 corresponds to the numerical value of the correction value information H (H1 to H6) in the input threshold correction signal S (S1 to S6) among the plurality of correction values r (r1 to r6) stored in advance in the ROM 37a. A correction value r (r1 to r6) is selected. Then, the selected correction value r (r1 to r6) is added to the sandwiching determination threshold value P (P ′ ← P + r). The correction values r1 to r3 are used to correct the pinching determination threshold value P in consideration of the increase in the pulse period of the wind motor 34 accompanying the decrease in the power supply voltage + B when the corresponding devices 21, 22, and 23 are driven. is there. Similarly, the correction values r4 to r6 are determined based on the sandwiching determination threshold in consideration of the increase in the pulse period of the wind motor 34 accompanying the decrease in the power supply voltage + B when the corresponding second to fourth power window devices 14 to 16 are driven. P is corrected.
[0044]
For example, the correction value r1 and the correction value r2 are set to have larger numerical values. The correction value r1 corresponds to the device (air conditioner) 21, the correction value r2 corresponds to the device (car stereo) 22, and the drive of the device (air conditioner) 21 rather than the drive of the device (car stereo) 22. This is because the numerical value of the correction value is increased to cause a large decrease in the power supply voltage + B (change amount of voltage decrease).
[0045]
As can be seen from a comparison between FIG. 9A and FIG. 9B, the ON operation of the device (air conditioner) 21 is greater than the pinching determination threshold value P ′ based on the ON operation of the device (car stereo) 22. The amount of correction of the pinching determination threshold value P ′ based on is increased.
[0046]
By correcting the pinching determination threshold value P, when the power supply voltage + B of the battery decreases due to the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16, the pinning error is detected. I try not to detect it. Each of the correction values r1 to r6 is obtained in advance by experimental data by a vehicle model, a known theoretical calculation, or the like.
[0047]
Further, the microcomputer 31 stores the correction value information H (H1 to H6) in the input threshold correction signal S (S1 to S6) among the plurality of correction value addition times t (t1 to t6) stored in advance in the ROM 37a. The correction value addition time t (t1 to t6) corresponding to the numerical value is selected. The correction value addition time t (t1 to t6) is the length of time during which the battery power supply voltage + B decreases due to the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16 (battery power supply voltage). + The length of time until B stabilizes). The correction value addition time t (t1 to t6) is obtained in advance by an experiment using a vehicle model or a known theoretical calculation.
[0048]
The timer 38 counts the elapsed time after adding the correction value r (r1 to r6) to the pinching determination threshold value P (P ′ ← P + r), and the correction value addition time t () in which the measured time is set. When reaching t1 to t6), a count-up signal is output to the microcomputer 31. The microcomputer 31 resets the timer 38 based on the count-up signal, and subtracts the correction value r (r1 to r6) from the pinching determination threshold value P to which the correction value r (r1 to r6) has been added (P ′ ← P '-R).
[0049]
The RAM 37b is a data work area for the arithmetic unit 36 to execute various arithmetic processes according to various control programs written in the ROM 37a. Further, the RAM 37b temporarily stores various calculation processing results and the like when the calculation unit 36 performs various calculation processes.
[0050]
In addition, about the structure of the 2nd-4th power window apparatus 14-16, since it is the same as that of the 1st power window apparatus 13, description of the structure is abbreviate | omitted.
The second power window device 14 has a wind motor drive circuit (33) based on a closing operation signal (CLS) or an opening operation signal (OPN) output from the closing operation switch (32a) or the opening operation switch (32b). It has a characteristic of driving and causing a drop in the power supply voltage + B of the battery by the driving. Further, the second power window device 14 outputs a threshold correction signal S4 based on the closing operation signal (CLS) or the opening operation signal (OPN) output from the closing operation switch (32a) or the opening operation switch (32b). It is supposed to be configured. The third power window device 15 and the fourth power window device 16 also have the same characteristics and configuration as the second power window device 14.
[0051]
Next, the operation of the power window device group 11 will be described.
When the opening operation switch 32b of the window switch 32 is turned on by the driver with the window glass closed, the opening operation signal OPN is input to the microcomputer 31, and the microcomputer 31 controls the wind motor drive circuit 33 to perform normal rotation. Output a signal. Then, the window motor drive circuit 33 causes the window motor 34 to rotate forward, and the window glass opens (lowers) accordingly.
[0052]
When the window glass is fully opened, the fully open detection limit switch Rs1 is turned on, and the fully open detection limit switch Rs1 outputs a fully open position signal Zk to the microcomputer 31. When the microcomputer 31 receives the fully open position signal Zk, the microcomputer 31 outputs a stop signal to the window motor drive circuit 33, and the window motor drive circuit 33 stops the window motor 34. Thus, the opening operation of the window glass is completed.
[0053]
On the other hand, when the closing operation switch 32a of the window switch 32 is turned on by the driver while the window glass is opened, the closing operation signal is input to the microcomputer 31, and the microcomputer 31 controls the wind motor drive circuit 33 to perform reverse rotation. Output a signal. Then, the wind motor drive circuit 33 reverses the wind motor 34, and accordingly, the window glass is closed (raised).
[0054]
When the window glass is fully closed, the fully closed detection limit switch Rs2 is turned on, and the fully closed detection limit switch Rs2 outputs a fully closed position signal Zp to the microcomputer 31. When the microcomputer 31 receives the fully closed position signal Zp, the microcomputer 31 outputs a stop signal to the window motor drive circuit 33, and the window motor drive circuit 33 stops the window motor 34. The window glass closing operation is thus completed.
[0055]
Next, the process for detecting whether or not the window glass is sandwiched, that is, the sandwiching prevention program process and the threshold correction program process will be described with reference to the flowcharts of FIGS. The pinching prevention program process and the threshold value correction program process are executed when the window glass closing operation is started, and thereafter, are repeated at predetermined control cycles during the window glass closing operation.
[0056]
In the flowcharts of FIGS. 5 to 7, the processes of S101 to S103 correspond to the pinching prevention program process, and the processes of S101 and S104 to S113 correspond to the threshold correction program process.
[0057]
First, the pinching prevention program process will be described.
As shown in FIG. 5, in step (hereinafter simply referred to as S) 101, it is determined whether or not a threshold correction signal S (S1 to S6) has been input. Here, the microcomputer 31 does not input the threshold correction signal S (S1 to S6) (because the threshold correction program process is performed when the threshold correction signal S is input), the process proceeds to S102.
[0058]
In S102, it is determined whether or not the period difference sum ΔTs is larger than the sandwiching determination threshold value P. As described in detail above, if the period difference sum ΔTs is larger than the pinching determination threshold value P, it is determined that a foreign object has been pinched in the window glass, and the window motor 34 is reversed or stopped in S103, and this routine is temporarily executed. The process ends (see FIG. 8). If the period difference sum ΔTs is smaller than the pinching determination threshold value P, this routine is once ended.
[0059]
Next, correction of the pinching determination threshold value P (threshold value correction program processing) will be described.
The threshold correction program processing is, for example, processing performed immediately before at least one of the devices 21, 22, 23 and the second to fourth power window devices 14-16 is driven while the first power window device 13 is being closed. It is.
[0060]
During the closing operation of the first power window device 13, for example, the passenger operates at least one of the power switches 21a, 22a, and 23a, and the drive request signal K ( When K1, K2, and K3) are output, the communication main ECU 12 performs the following processing. The communication main ECU 12 sends a threshold correction signal S (S1, S2, S3) based on the input drive request signal K (K1, K2, K3) to the first power window device 13 (second to fourth power window devices 14 to 14). To 16).
[0061]
Alternatively, during the closing operation of the first power window device 13, for example, the passenger operates the closing operation switch (32a) or the opening operation switch (32b) of the second to fourth power window devices 14 to 16. Then, the threshold value correction signal S (S4 to S6) is output from the operated power window device to other power window devices (including the first power window device 13).
[0062]
When the first power window device 13 is in the closing operation, the microcomputer 31 performs the processes of the flowcharts shown in FIGS. 5 to 8 when the threshold correction signal S (S1 to S6) is input from the outside.
[0063]
As shown in FIG. 5, in S101, it is determined whether or not a threshold correction signal S (S1 to S6) has been input. Here, since the microcomputer 31 has input the threshold correction signal S (S1 to S6), the process proceeds to S104.
[0064]
In S104, the correction value r (r1 to r6) stored in advance in the ROM 37a based on the correction value information H (H1 to H6) included in the threshold correction signal S (S1 to S6), and the correction value addition time t (t1 to t6) is selected, and the correction value r (r1 to r6) is added to the sandwiching determination threshold value P (P ′ ← P + r). The correction value addition time t (t1 to t6) defines the length of time during which the correction value r (r1 to r6) is added to the sandwiching determination threshold value P.
[0065]
As shown in the time chart of FIG. 9A, for example, when the power switch 22a of the device (car stereo) 22 is turned on while the first power window device 13 is closed, the pinching determination threshold value P is corrected (P ′ ← P + r), and thereafter, the periodic difference sum ΔTs increases due to the change in the power supply voltage caused by driving the device (car stereo) 22. That is, as shown in FIG. 3, the device (car stereo) 22 is driven after the pinching determination threshold value P is corrected (P ′ ← P + r). As a result, the period difference sum ΔTs does not become larger than the sandwiching determination threshold value P ′ due to the fluctuation of the period difference sum ΔTs due to the driving of the device (car stereo) 22.
[0066]
FIG. 9B is a time chart when, for example, the power switch 21a of the device (air conditioner) 21 is turned on while the first power window device 13 is closed, and the power switch of the device (car stereo) 22 is turned on. The same phenomenon occurs when the 22a is turned on.
[0067]
In S105, it is determined whether or not the period difference sum ΔTs is larger than the sandwiching determination threshold P ′. As described in detail above, if the period difference sum ΔTs is larger than the pinching determination threshold value P ′, it is determined that a foreign object is pinched in the window glass, and the wind motor 34 is reversed or stopped in S106. In step S107, the pinching determination threshold value P ′ is returned to the initial value, and this routine is temporarily ended.
[0068]
FIG. 10 is a time chart when, for example, the power switch 22a of the device 22 is turned on while the first power window device 13 is closed, and a foreign object such as a finger is caught between the window glass and the window frame. is there. As can be seen from the figure, the periodic difference sum ΔTs is larger than the pinching determination threshold value P ′, and as a result, the microcomputer 31 determines that a foreign object such as a hand is pinched between the window glass and the window frame.
[0069]
On the other hand, in S105, if the period difference sum ΔTs is smaller than the sandwiching determination threshold value P ′, the process proceeds to S108.
In S108, it is determined whether or not a plurality of correction values r (r1 to r6) are added to the pinching determination threshold value P ′. When a plurality of correction values r (r1 to r6) are not added to the pinching determination threshold value P ′, that is, when one correction value r (r1 to r6) is added to the pinching determination threshold value P ′, S109 Move on.
[0070]
In S109, it is determined whether or not the elapsed time after adding the correction value r (r1 to r6) to the pinching determination threshold value P ′ has reached the correction value addition time t (t1 to t6). When the correction value addition time t (t1 to t6) after the correction value r (r1 to r6) is added to the pinching determination threshold value P ′, the process proceeds to S107, and the pinching determination threshold value P ′ is returned to the initial value. This routine is once terminated. When the correction value addition time t (t1 to t6) after the correction value r (r1 to r6) is added to the sandwiching determination threshold P ′ has not been reached, the process proceeds to S110.
[0071]
In S110, it is determined whether or not a new threshold correction signal S (S1 to S6) is input from the outside of the first power window device 13 (microcomputer 31). When a new threshold correction signal S (S1 to S6) is input from the outside of the first power window device 13, the process proceeds to S111.
[0072]
In S111, the correction value r (r1 to r6) stored in advance in the ROM 37a based on the correction value information H (H1 to H6) included in the new threshold correction signal S (S1 to S6), and the correction The value addition time t (t1 to t6) is selected. Then, the correction value r (r1 to r6) is added to the sandwiching determination threshold value P ′ (P ′ ← P ′ + r), and the process returns to S105.
[0073]
On the other hand, in S110, when a new threshold correction signal S (S1 to S6) is not input from the outside of the first power window device 13, the process returns from S110 to S105.
Incidentally, in S108, when a plurality of correction values r (r1 to r6) are added to the pinching determination threshold value P ′, the process proceeds to S112.
[0074]
In S112, whether each correction value r (r1 to r6) added to the sandwiching determination threshold value P ′ has reached each correction value addition time t (t1 to t6) corresponding to the elapsed time since the addition was made. It is determined whether or not. When each correction value r (r1 to r6) has reached each correction value addition time t (t1 to t6) after being added to the sandwiching determination threshold value P ′, the process proceeds to S107, where the sandwiching determination threshold value P ′ is set. It returns to the initial value and terminates this routine once. When each correction value r (r1 to r6) has not reached each correction value addition time t (t1 to t6) after addition, the process proceeds to S113.
[0075]
In S113, among the plurality of correction values r (r1 to r6) added to the sandwiching determination threshold value P ′, the correction value r that has elapsed since the addition has reached the correction value addition time t (t1 to t6). (R1 to r6) is subtracted (P ′ ← P′−r) from the pinching determination threshold value P ′. The correction values r (r1 to r6) that have reached the correction value addition time t (t1 to t6), that is, the devices 21, 22, 23 and the second to fourth power window devices corresponding to the correction values r (r1 to r6). 14 to 16 indicate that a predetermined time has elapsed since driving. For this reason, since the reduction of the power supply voltage + B caused by the device (power window device) is completed, the correction value r (r1 to r6) is subtracted from the pinching determination threshold value P ′. And it returns to S105 through the process of S110 and (S111).
[0076]
Therefore, according to the power window device group 11 of the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the microcomputer 31 corrects the pinching determination threshold value P based on the input threshold value correction signal S (S1 to S6). The microcomputer 31 inputs the threshold value correction signal S (S1 to S6) in advance to reduce the power supply voltage + B of the battery by driving the devices 21, 22, 23 and the second to fourth power window devices 14-16 in advance. The presence / absence detection of the wind glass can be detected while taking into consideration.
[0077]
For this reason, the microcomputer 31 can correct the pinching determination threshold value P with high accuracy when a plurality of devices (power window devices) that reduce the power supply voltage + B of the battery are driven by driving while the window glass is closed. In addition, even when the device that causes the battery power supply voltage + B to drop rapidly is driven alone while the window glass is closed, the microcomputer 31 can correct the pinching determination threshold value P with high accuracy. Therefore, the microcomputer 31 according to the present embodiment is more accurate in detecting pinching than the one in which the voltage change amount and current change amount of the motor of Patent Document 1 are respectively compared with predetermined threshold values and erroneous detection of pinching is performed. Can be improved.
[0078]
(2) In the present embodiment, the pinching determination threshold value P is corrected before the battery power supply voltage + B decreases due to driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. Therefore, the periodic difference sum ΔTs does not become larger than the sandwiching determination threshold value P due to a decrease in the power supply voltage + B of the battery due to the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. The microcomputer 31 can improve the detection accuracy of the presence or absence of pinching.
[0079]
(3) In the present embodiment, the window glass pinching presence / absence detection unit U includes the microcomputer 31 and the communication main ECU 12. When the communication main ECU 12 receives the drive request signal K (K1, K2, K3), the communication main ECU 12 generates a first threshold correction signal S (S1, S2, S3) corresponding to the drive request signal K (K1, K2, K3). ~ Output to fourth power window devices 13 to 16, respectively. The communication main ECU 12 outputs the threshold correction signal S (S1, S2, S3) to the first to fourth power window devices 13 to 16 based on the input of the drive request signal K (K1, K2, K3), The power supply voltage + B is supplied to the device that has output the drive request signal K (K1, K2, K3) among 21, 22, and 23. Then, after the microcomputer 31 corrects the pinching determination threshold value P, the devices 21, 22, and 23 are driven.
[0080]
Therefore, for example, as shown in FIGS. 3 and 9, since the devices 21, 22, and 23 are driven after the pinching determination threshold value P is corrected, the period difference sum ΔTs due to the driving of the devices 21, 22, and 23 is increased. Due to the fluctuation, the periodic difference sum ΔTs does not become larger than the sandwiching determination threshold value P. Therefore, the microcomputer 31 of this embodiment can improve the detection accuracy of the presence or absence of pinching.
[0081]
(4) In this embodiment, as shown in FIG. 4, the microcomputer (31) of the second to fourth power window devices 14 to 16 sends a normal rotation control signal or a reverse rotation control signal to the wind motor drive circuit (33). Before the output, the threshold correction signal S (S4, S5, S6) is output to another power window device other than itself. That is, during the closing operation of the first power window device 13, for example, when a passenger operates the second to fourth power window devices 14 to 16, the first power window device 13 is driven from the operated power window device. A threshold correction signal S (S4, S5, S6) is output to a power window device other than the power window device.
[0082]
The microcomputer 31 of the first power window device 13 corrects the pinching determination threshold value P based on the input threshold value correction signal S (S4, S5, S6), and then operates the second to fourth power window devices 14 operated. ~ 16 are driven. Therefore, the periodic difference sum ΔTs does not become larger than the pinching determination threshold value P due to fluctuations in the periodic difference sum ΔTs due to driving of the power window devices other than the first power window device 13. Therefore, the microcomputer 31 of this embodiment can improve the detection accuracy of the presence or absence of pinching.
[0083]
(5) In the present embodiment, the threshold correction signals S1 to S6 include different correction value information H (H1 to H6).
The microcomputer 31 can input the threshold correction signals S1 to S6. The microcomputer 31 selects a different correction value r (r1 to r6) for each correction value information H (H1 to H6) of the threshold correction signal S (S1 to S6), and the selected correction value r (r1 to r6). Is added to the sandwiching determination threshold value P. Therefore, the correction value of the sandwiching determination threshold value P can be appropriately set depending on whether a device that causes a large decrease in power supply voltage + B is driven by driving or a device that causes a decrease in power supply voltage + B due to driving. Therefore, it is possible to improve the detection accuracy of the presence or absence of pinching.
[0084]
(6) In the present embodiment, the communication main ECU 12 and the first to fourth power window devices 13 to 16 are electrically connected to each other by the high-speed multiplex communication line L. By multiplex communication, the number and total weight of the wire harnesses in the vehicle can be reduced. As a result, wiring in the vehicle can be simplified and the total weight of the vehicle can be reduced.
[0085]
(7) In the present embodiment, when the devices 21, 22, and 23 are driven, the driver or the like turns on the power switches 21a, 22a, and 23a to turn on the communication main ECU 12 from the power switches 21a, 22a, and 23a. Drive request signal K (K1, K2, K3). The communication main ECU 12 outputs the threshold correction signal S (S1, S2, S3) to the first to fourth power window devices 13-16 based on the drive request signal K (K1, K2, K3), and then The power supply voltage + B is supplied to the device that has output the drive request signal K (K1, K2, K3). That is, the devices 21, 22, and 23 are not configured so that the drive request signals K (K1, K2, and K3) including the correction value information H (H1 to H6) are directly output from the devices 21, 22, and 23. Also good.
[0086]
Accordingly, by providing the power window device group 11 with the communication main ECU 12, when the devices 21, 22, and 23 are mounted on the vehicle, the existing devices can be used without special improvement for the power window device group 11. As a result, the production cost of the vehicle can be reduced.
[0087]
Since the devices 21, 22, and 23 are configured to be supplied with the power supply voltage + B via the communication main ECU 12, the devices 21, 22, and 23 are configured to be supplied with the power supply voltage + B without using the communication main ECU 12. Accordingly, the time from the ON operation of the power switches 21a, 22a, and 23a to the driving is slightly delayed. However, the delay from the ON operation to the driving of the power switches 21a, 22a, and 23a is, for example, about 2 ms (two thousandths of a second), so the driver does not feel the delay.
[0088]
(8) In the present embodiment, among the plurality of correction values r (r1 to r6) added to the pinching determination threshold value P ′, the elapsed time after the addition is the correction value addition time t (t1 to t6). The reached correction value r (r1 to r6) is subtracted (P ′ ← P′−r) from the pinching determination threshold value P ′. That is, the microcomputer 31 returns the pinching determination threshold value P to the initial value before correction after a predetermined time from the correction of the pinching determination threshold value P. Therefore, when a device (power window device) that has caused a decrease in power supply voltage + B does not cause a decrease in power supply voltage + B, correction values r (r1 to r6) corresponding to the device (power window device) are set. By omitting from the pinching determination threshold value P ′, it is possible to satisfactorily detect whether the window glass is pinched.
[0089]
(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
For convenience of explanation, the same components as those in the first embodiment are denoted by the same reference numerals, and a part of the explanation is omitted.
[0090]
In this embodiment, the window glass pinching prevention program and the threshold value correction program of the microcomputer 31 are changed. In the present embodiment, the communication main ECU 12 is configured as follows when the drive request signal K (K1, K2, K3) is input from at least one of the devices 21, 22, 23. . The communication main ECU 12 outputs a threshold correction signal S (S1, S2, S3) based on the drive request signal K (K1, K2, K3) to the first to fourth power window devices 13-16. At the same time (or almost simultaneously), the communication main ECU 12 supplies the power supply voltage + B to the device that outputs the drive request signal K (K1, K2, K3) among the devices 21, 22, and 23.
[0091]
When the microcomputer 31 outputs the forward rotation control signal or the reverse rotation control signal to the window motor drive circuit 33 when the opening operation signal OPN or the closing operation signal CLS is input from the window switch 32, the microcomputer 31 operates at high speed at the same time (or almost simultaneously). The threshold correction signal S (S0) is output to the second to fourth power window devices 14 to 16 through the multiplex communication line L. In addition, each of the second to fourth power window devices 14 to 16 is configured as shown below when the switches of the window switches provided therein are operated. Each of the second to fourth power window devices 14 to 16 outputs a forward rotation control signal or a reverse rotation control signal to the window motor drive circuit at the same time (or almost simultaneously), and other than itself via the high speed multiplex communication line L A threshold correction signal S (S4, S5, S6) is output to another power window device.
[0092]
In the present embodiment, the microcomputer 31 of the first power window device 13 stores the threshold correction signal S (S1 to S6) input from the outside in the RAM 37b for a predetermined time. Here, the predetermined time is the correction value addition time t (t1 to t6) of the correction value information H (H1 to H6) in each threshold correction signal S (S1 to S6). Then, the threshold correction signal S (S1 to S6) for which the correction value addition time t (t1 to t6) has elapsed since being stored in the RAM 37b is erased from the RAM 37b. The RAM 37b can store a plurality of threshold correction signals S.
[0093]
Next, the process for detecting whether or not the window glass is sandwiched, that is, the sandwiching prevention program process and the threshold correction program process will be described with reference to the flowchart of FIG. The pinching prevention program process and the threshold value correction program process are executed when the window glass closing operation is started, and thereafter, are repeated at predetermined control cycles during the window glass closing operation.
[0094]
As shown in FIG. 11, in S201, it is determined whether or not the period difference sum ΔTs is larger than the sandwiching determination threshold value P. If the periodic difference sum ΔTs is larger than the sandwiching determination threshold value P, the process proceeds to S202. If the periodic difference sum ΔTs is smaller than the sandwiching determination threshold value P, this routine is temporarily ended.
[0095]
In S202, it is determined whether or not the threshold correction signal S (S1 to S6) is stored in the RAM 37b of the microcomputer 31. If the threshold value correction signal S (S1 to S6) is not stored in the RAM 37b, the window motor 34 is reversed or stopped in S207, and this routine is once ended. If it is determined as “NO” in S202, the vehicle power supply voltage + B is not reduced due to driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16 in the vehicle. become. For this reason, it is determined that the foreign matter is sandwiched between the window glass and the window frame because the period difference sum ΔTs is larger than the sandwiching determination threshold value P in the determination of S201 previously performed in S207. The wind motor 34 is reversed or stopped to prevent foreign matter from being caught.
[0096]
On the other hand, in S202, if the threshold correction signal S (S1 to S6) is stored in the RAM 37b, the process proceeds to S203. When the threshold correction signal S (S1 to S6) is stored in the RAM 37b, the power supply voltage of the battery is caused by the driving of the devices 21, 22, and 23 and the second to fourth power window devices 14 to 16. There is a possibility that + B is lowered. That is, the reason why the period difference sum ΔTs becomes larger than the sandwiching determination threshold value P in the determination of S201 previously is caused by driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. It may be.
[0097]
In S203, therefore, the correction value r (r1 to r6) stored in advance in the ROM 37a is selected based on the correction value information H (H1 to H6) of the threshold correction signal S (S1 to S6) stored in the RAM 37b. Then, the correction value r (r1 to r6) is added to the sandwiching determination threshold value P (P ′ ← P + r). If a plurality of threshold correction signals S (S1 to S6) are stored in the RAM 37b, based on the correction value information H (H1 to H6) of all the threshold correction signals S (S1 to S6). Correction values r (r1 to r6) stored in advance in the ROM 37a are respectively selected. Then, the correction values r (r1 to r6) are added to the sandwiching determination threshold value P (P ′ ← P + r +... + R). In S203, when the correction of the pinching determination threshold value P is completed, the process proceeds to S204.
[0098]
In S204, it is determined whether or not the period difference sum ΔTs is larger than the sandwiching determination threshold value P ′. If the period difference sum ΔTs is larger than the sandwiching determination threshold value P ′, it is determined that a foreign object is sandwiched between the window glass and the window frame, and the process proceeds to S208 where the wind motor 34 is reversed or stopped to prevent the foreign object from being sandwiched. . In step S206, the pinching determination threshold value P ′ is returned to the initial value (all correction values r (r1 to r6) added to the pinching determination threshold value P are excluded), and this routine is temporarily ended.
[0099]
On the other hand, if the period difference sum ΔTs is not larger than the sandwiching determination threshold value P ′ in S204, the process proceeds to S205.
In S205, it is determined whether or not the correction value addition time t (t1 to t6) has elapsed since one or more threshold correction signals S (S1 to S6) stored in the RAM 37b are input to the RAM 37b. Yes. In the case where a plurality of threshold correction signals S (S1 to S6) are stored in the RAM 37b, all the threshold correction signals S (S1 to S6) stored in the RAM 37b are input to the RAM 37b and then corrected values, respectively. It is determined whether or not the additional time t (t1 to t6) has elapsed. When the correction value addition time t (t1 to t6) has elapsed since the threshold correction signal S (when there are a plurality of threshold correction signals S, all threshold correction signals S) are input to the RAM 37b, the pinch determination threshold P ′ is set. Since it is not necessary to add the correction value r (r1 to r6) for a longer time, the process proceeds to S206. Then, the sandwiching determination threshold value P ′ is returned to the initial value, and this routine is ended once.
[0100]
On the other hand, if at least one of the threshold correction signals S (S1 to S6) input to the RAM 37b has not passed the correction value addition time t (t1 to t6), the process proceeds to S209. In S209, the pinch determination threshold value P ′ is returned to the initial value. When a plurality of threshold correction signals S (S1 to S6) are stored in the RAM 37b, the threshold correction signals S (S1 to S6) that have passed the correction value addition time t (t1 to t6) after being input to the RAM 37b. ) Is deleted from the RAM 37b, and the process returns to S203. As a result, when the devices 21, 22, 23 and the second to fourth power window devices 14 to 16 that have caused the decrease in the power supply voltage + B of the battery no longer cause the decrease in the power supply voltage + B, the device (power window No further correction of the pinching determination threshold value P by the device is performed.
[0101]
Therefore, according to the power window device group 11 of the second embodiment, in addition to the effects (1) and (5) to (7) in the first embodiment, the following effects are obtained. be able to.
[0102]
(1) In the present embodiment, the pinching determination threshold value P is corrected when the power supply voltage + B of the battery is lowered due to the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. More specifically, when the periodic difference sum ΔTs becomes larger than the sandwiching determination threshold value P due to the decrease in the power supply voltage + B of the battery due to the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16, The pinching determination threshold value P is corrected. Thereafter, the period difference sum ΔTs and the corrected pinching determination threshold value P ′ are compared to detect whether the window glass is pinched. Therefore, the microcomputer 31 can improve the detection accuracy of the presence or absence of pinching.
[0103]
(2) In the present embodiment, in the case where a plurality of threshold correction signals S (S1 to S6) are stored in the RAM 37b, the threshold correction after the correction value addition time t (t1 to t6) has elapsed since being input to the RAM 37b. The signal S (S1 to S6) is erased from the RAM 37b. Thereafter, the pinching determination threshold value P ′ is returned to the initial value, and the pinching determination threshold value P is corrected again based on the correction value information H (H1 to H6) of the threshold correction signal S (S1 to S6) stored in the RAM 37b. I made it. That is, the microcomputer 31 returns the pinching determination threshold value P to the initial value before correction after a predetermined time from the correction of the pinching determination threshold value P. Therefore, the same effect as (8) in the first embodiment can be obtained.
[0104]
In the present specification, the other devices include an air conditioner, a car stereo, a starter, and a power window device for other seats. In this specification, the operation signal is a signal instructing operation of another device or a drive start signal of another device.
[0105]
In addition, you may change each said embodiment into the following aspects.
In each of the above embodiments, the pinching determination threshold value P is corrected by the decrease in the power supply voltage + B based on the driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. However, the present invention is not limited to this, and the pinching determination threshold value P is corrected by the increase of the power supply voltage + B (the amount of change in voltage increase) based on the stop of driving of the devices 21, 22, 23 and the second to fourth power window devices 14-16. May be.
[0106]
In each of the above embodiments, the devices 21, 22, and 23 output the threshold correction signal S (S1, S2, S3) to the first to fourth power window devices 13 to 16 via the communication main ECU 12. It was. Not limited to this, devices other than the devices 21, 22, and 23 among the devices in the vehicle are electrically connected to the communication main ECU 12, and the devices are connected to the first to fourth power window devices via the communication main ECU 12. The threshold correction signal S may be output to 13-16. For example, an engine drive detection sensor may be electrically connected to the communication main ECU 12. The engine drive detection sensor outputs an engine stop signal (corresponding to an on / off signal) to the communication main ECU 12 when the engine (not shown) is stopped. The communication main ECU 12 is based on the input of the engine stop signal from the engine drive detection sensor. The threshold correction signal S is output to the first to fourth power window devices 13 to 16. With this configuration, when the engine stops, a generator (alternator) (not shown) stops and the power supply voltage + B of the battery decreases. However, the sandwiching determination threshold value P can be corrected in consideration of the decrease of the power supply voltage + B. .
[0107]
In each of the above-described embodiments, the communication main ECU 12 and the first power window device 13 constitute the window glass pinching presence / absence detection unit U. However, the present invention is not limited to this, and at least one of the first to fourth power window devices 13 to 16 and the communication main ECU 12 may constitute the sandwiching presence / absence detection unit U of the window glass.
[0108]
The microcomputer 31 of each of the embodiments obtains the period difference sum ΔTs based on the amount of change in the rotational speed of the wind motor 34, compares the period difference sum ΔTs with the pinching determination threshold value P, and determines the result of the comparison. Based on this, the presence or absence of pinching was determined. The microcomputer 31 corrects the pinching determination threshold value P based on the input of the threshold correction signal S to improve the detection accuracy of the pinching presence / absence. However, the present invention is not limited to this, and a current detection type windshield pinching presence / absence detection device (hereinafter referred to as a microcomputer) may correct the pinching determination threshold based on a threshold correction signal input to the microcomputer. More specifically, in this microcomputer, a motor current value (a change amount of the motor current) as a determination target value is compared with a pinching determination threshold value, and the presence / absence of pinching is determined based on the comparison result. Then, the power supply voltage + B decreases due to the driving of the device that outputs the threshold correction signal, the rotation speed of the wind motor decreases due to the decrease in the power supply voltage + B, and the motor current value increases due to the decrease in the rotation speed of the wind motor. However, the microcomputer corrects the pinching determination threshold value in consideration of the increase. Incidentally, the motor current in this case is a current generated when the wind motor operates as a generator due to the movement-inhibiting resistance force acting on the window glass.
[0109]
Next, the technical ideas that can be grasped from the above-described embodiments and changes in the modes will be described below.
(B) The window glass pinching presence / absence detecting device according to claim 1, wherein when the operation signal is input, the threshold correction unit corrects the pinching determination threshold based on the operation signal.
[0110]
(B) The threshold correction means can input a plurality of operation signals each having different correction value information, sets the magnitude of the correction value based on the correction value information of the input operation signal, and corrects the correction value 4. The wind glass pinching presence / absence detection device according to claim 1, wherein a value is added to the pinching determination threshold value. 5.
[0111]
(C) The window glass pinching presence / absence detection unit according to claim 4, wherein the control unit drives or stops the other device after the threshold correction unit corrects the pinching determination threshold.
[0112]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to improve the detection accuracy of the presence or absence of pinching.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing electrical connection of a power window device group according to a first embodiment.
FIG. 2 is a block diagram schematically showing electrical connection of the power window device in the first embodiment.
FIG. 3 is a timing chart showing the relationship of processing in each device, communication main ECU, and power window device in the first embodiment.
FIG. 4 is a timing chart showing a processing relationship between a power window device that outputs a threshold correction signal and a power window device that inputs a threshold correction signal according to the first embodiment;
FIG. 5 is a flowchart showing a pinching prevention program (threshold correction program) in the first embodiment.
FIG. 6 is a flowchart showing a pinching prevention program (threshold correction program) in the first embodiment.
FIG. 7 is a flowchart showing a pinching prevention program (threshold correction program) in the first embodiment.
FIG. 8 is a timing chart showing the relationship between the rotational speed of the wind motor and the internal processing of the microcomputer in the first embodiment.
FIG. 9A is a timing chart showing the relationship among the car stereo, the power supply voltage, and the internal processing of the microcomputer in the first embodiment. (B) is a timing chart showing the relationship between the air conditioner, the power supply voltage, and the internal processing of the microcomputer in the first embodiment.
FIG. 10 is a timing chart showing the relationship between the car stereo, the power supply voltage, and the internal processing of the microcomputer according to the first embodiment.
FIG. 11 is a flowchart showing a pinching prevention program (threshold correction program) in the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12 ... Communication main ECU as a control means, 13-16 ... 1st-4th power window apparatus as another apparatus and control means, 21-23 ... Equipment as other apparatuses, 31 ... Judgment value calculation means, Determining means, threshold correcting means, microcomputer as window glass pinching presence / absence detecting device, 34... Window motor, H (H1 to H6)... Correction value information, K... Driving request signal as operation signal, P. , R (r1 to r6)... Correction value, S (S1 to S6)... Threshold correction signal as operation signal, U... Winding glass pinching presence / absence detection unit, .DELTA.Ts. A closing operation signal as a signal, an OPN... Opening operation signal as an operation signal.

Claims (4)

Judgment target for obtaining a judgment target value for the presence / absence of pinching of the window glass based on the amount of change in the rotational speed of the wind motor that opens and closes the window glass or the amount of change in the motor current generated by the window motor that opens and closes the window glass Value calculation means;
In the wind glass pinching presence / absence detection device, comprising: a determination unit that compares the determination target value with a predetermined pinching determination threshold value and determines the presence or absence of pinching based on a result of the comparison.
A window glass pinching presence / absence detecting device comprising threshold correction means for inputting an operation signal of another device and correcting the pinching determination threshold based on the operation signal. 2. The sandwiching of the windshield according to claim 1, wherein the threshold correction unit corrects the sandwiching determination threshold when comparing the determination target value with the sandwiching determination threshold based on the input operation signal. Presence detection device. 3. The detection of presence / absence of pinching of a wind glass according to claim 1, wherein the threshold correction unit returns the pinching determination threshold to an initial value before correction after a predetermined time from the correction of the pinching determination threshold. apparatus. Winding glass pinching presence / absence detection device according to any one of claims 1 to 3,
Control means for inputting the operation signal output from the other device and outputting the operation signal to the threshold correction means;
The window glass pinching presence / absence detection unit characterized in that the control means drives or stops the other device that outputs the operation signal.

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