JP2017172147A - Caught-in detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caught-in detector capable of hastening timing to detect caught-in.SOLUTION: A power window device 4 comprises: a motor 7a, which lifts up or down a window glass 3; a first pulse sensor 11 used to detect amount of opening or closing of the window glass 3; and a second pulse sensor 12 used to detect opening and closing direction of the window glass 3. A caught-in control part 16 detects the presence of caught-in by the window glass 3 by using not only output of the first pulse sensor 11 but also output of the second pulse sensor 12 when the window glass 3 is operated to move up.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pinching detection device that detects pinching by an operating body.

  2. Description of the Related Art Conventionally, a pinch detection device that detects a pinch of an object by a window glass at the time of, for example, an auto-up operation of a window glass of a vehicle door is known (see Patent Document 1). This type of pinching detection device determines whether pinching has occurred based on, for example, the output (pulse output) of a pulse sensor that detects the number of rotations of the motor. The window glass is turned over or stopped.

JP 2000-152777 A

  In this type of pinching detection device, there is a need to detect immediately when pinching occurs. In particular, when judging by the pulse width time of the pulse sensor, since the pulse width time becomes longer at the time of pinching, the timing of the pulse edge is delayed accordingly, and it takes time to reach the CPU processing cycle. there were.

  An object of the present invention is to provide a pinching detection device that can advance the pinching detection timing.

  The pinch detection device that solves the above problem receives a first pulse signal from a first pulse sensor that is used to detect the amount of operation of the operating body, and based on the first pulse signal, the operating body during operation In the configuration in which the sandwiching control unit detects the sandwiching of the actuator, the sandwiching control unit acquires a second pulse signal from a second pulse sensor used to detect the operating direction of the operating body, and uses the first pulse signal. In addition to the pinching determination, the pinching determination using the second pulse signal is also executed.

  According to this configuration, it is possible to perform the pinching determination by using both edges of the first pulse signal and the second pulse signal as a trigger, so that the detection timing for performing the pinching determination increases. Therefore, the reversing operation can be started by detecting pinching earlier than in the past. In this respect, it is further advantageous to ensure the safety of the user.

  In the pinching detection device, when the controller that controls the operating body detects that the operating amount of the operating body is less than a specified value based on the first pulse signal of the first pulse sensor, the operation is performed. A decelerating operation for operating the operating body at a speed lower than an operating speed when the operating amount of the body is equal to or greater than a predetermined value, and the sandwiching control unit is configured to perform the second operation when the operating body takes the decelerating operation. It is preferable to execute the pinching determination using the second pulse signal of the pulse sensor. According to this configuration, the deceleration operation is an operation performed in the vicinity of the closing position, so that the region is likely to be caught. Therefore, it is possible to increase the processing period for pinching determination in an area where pinching is likely to occur.

  In the pinching detection device, it is preferable that the operating body is a window glass that is automatically lifted and lowered provided on a vehicle door. According to this structure, it becomes possible to detect the pinching of the vehicle door by the window glass at an early stage.

  According to the present invention, the pinching detection timing can be advanced.

The block diagram of a power window apparatus. Timing chart when switching from normal speed operation to deceleration operation. Timing chart when switching from deceleration operation to reverse operation.

Hereinafter, an embodiment of a pinch detection device will be described with reference to FIGS.
As shown in FIG. 1, the vehicle 1 includes a power window device 4 that automatically opens and closes the window glass 3 of the vehicle door 2. The power window device 4 includes a controller 5 that controls the operation of the power window device 4, a switch unit 6 that is operated when the window glass 3 is raised and lowered, and an actuator 7 that is a drive source when the window glass 3 is raised and lowered. Prepare. The actuator 7 is preferably a motor 7a, for example. The controller 5 moves the window glass 3 up and down via the actuator 7 based on the operation signal of the switch unit 6.

  The switch unit 6 is a seesaw switch that can be swung. In the seesaw switch, one of the tilting operations is for raising, and the other of the tilting operations is for descending. When the tilt side of the seesaw switch is tilted once, the window glass 3 is raised during the operation, and when the tilt operation is continuously performed twice (auto-up operation), the window glass 3 is automatically lifted. On the other hand, when the tilt side of the seesaw switch is tilted once, the window glass 3 is lowered during the operation, and when tilted twice (automatic down operation) continuously, the window glass 3 is automatically lowered.

  The controller 5 includes a first pulse sensor 11 used to detect an operation amount (opening / closing amount) of the operating body 10 (in this example, the window glass 3) and an operating direction of the operating body 10 (in this example, the window glass 3) ( And a second pulse sensor 12 used to detect (opening / closing direction). The second pulse sensor 12 detects the operating direction in which the window glass 3 is raised or lowered, that is, the rotational direction of the power window motor. The controller 5 inputs the detection signal (first pulse signal S1) of the first pulse sensor 11 and the detection signal (second pulse signal S2) of the second pulse sensor 12. Various sensors such as a magnetic sensor and an optical sensor can be applied to the first pulse sensor 11 and the second pulse sensor 12.

  The controller 5 determines the opening / closing amount of the window glass 3 by counting the edges of the first pulse signal S1. The opening / closing amount determination is processing for determining the opening / closing amount (opening / closing height) of the window glass 3. The controller 5 determines the operating direction of the window glass 3 from the combination of the first pulse signal S1 and the second pulse signal S2. The operation direction determination of the window glass 3 is a process for determining whether the window glass 3 is in the lifting operation or the lowering operation by detecting the rotation direction of the motor 7a.

  The controller 5 controls the window glass 3 by normal speed operation when the opening / closing amount of the window glass 3 is greater than or equal to a specified value during the raising operation of the window glass 3, and the opening / closing amount of the window glass 3 is less than the specified value (window glass 3 The window glass 3 is controlled by a deceleration operation (slow control). The normal speed operation is an operation giving priority to the closing operation speed of the window glass 3. Further, the deceleration operation is an operation in which the operation speed (ascending speed) of the window glass 3 is set lower than that during normal speed operation.

  The power window device 4 includes a pinching detection function (pinching detection device 15) that detects pinching by the operating body 10 (in this example, the window glass 3). For example, when the window glass 3 takes a closing operation (for example, an auto-up operation) and detects that the window glass 3 interferes with an object, the pinching detection device 15 stops or reverses the operation of the window glass 3, Eliminate pinching.

  The pinching detection device 15 includes a pinching control unit 16 that controls the pinching by the operating body 10. The sandwiching control unit 16 is provided in the controller 5. The sandwiching control unit 16 performs sandwiching determination using the first pulse signal S1 as a trigger in both the normal speed operation and the deceleration operation. In addition, the pinching control unit 16 of this example performs not only pinching determination using the first pulse signal S1 but also pinching determination using the second pulse signal S2 input from the second pulse sensor 12 during deceleration operation. Is possible. When the sandwiching control unit 16 detects the sandwiching of the window glass 3, the sandwiching control unit 16 performs the reversing operation of the window glass 3. The reversal operation is an operation for forcibly switching the window glass 3 that has been raised to the lowering.

Next, the operation and effect of the pinch detection device 15 will be described with reference to FIGS. 2 and 3.
As shown in FIG. 2, the controller 5 operates along a processing cycle determined from a cycle of an oscillator (not shown) provided in the controller 5. The periodic process repeatedly occurs at a predetermined time interval. The controller 5 sequentially monitors the first pulse signal S1 and the second pulse signal S2, and the pulse level (edge) of the first pulse signal S1 and the second pulse signal S2 and the pulse of the first pulse signal S1. The width time n (n1 to n7...) And the pulse width time s (s1, s2...) Of the second pulse signal S2 can be acquired. And the controller 5 performs the various determination processes related to the raising / lowering operation | movement of the window glass 3 at the process period of the timing based on the edge of 1st pulse signal S1 or 2nd pulse signal S2.

  In the controller 5 of this example, in any of the normal speed operation, the deceleration operation, and the reversal operation, when the processing period of the next timing at which the edge (rising edge, falling edge) of the first pulse signal S1 is detected, Various determination processes (opening / closing amount determination, operation direction determination, pinching determination) are executed. That is, when the pulse edge of the first pulse signal S1 is detected, all of the opening / closing amount determination, the operation direction determination, and the pinching determination are performed.

  In FIG. 2, it is assumed that the opening / closing amount of the window glass 3 is initially large and the normal speed operation is being performed. At this time, when the controller 5 detects the rising edge indicated by “Ea” in the drawing of the first pulse signal S1, various determination processes (opening / closing amount determination, operation direction determination, pinching determination) are performed in the next processing cycle T1. Execute. By the way, in the operation direction determination at this time, the second pulse signal S2 is used, and when the rising edge Ea of the first pulse signal S1 is detected, the second pulse signal S2 is at the Hi level. It is determined that is moving up.

  In the opening / closing amount determination, the opening / closing amount of the window glass 3 is calculated by incrementing or decrementing a position monitoring counter (not shown) in consideration of the operating direction of the window glass 3. That is, for example, when the window glass 3 is fully closed, the counter is incremented when the window glass 3 is lowered, and conversely, the counter is decremented when the window glass 3 is raised, and the opening / closing amount of the window glass 3 is detected.

  When the controller 5 detects a falling edge indicated by “Eb” in the drawing of the first pulse signal S1, the controller 5 executes various determination processes in the next processing cycle T2. By the way, in the pinching determination at this time, the pulse width time n1 of the first pulse signal S1 and the pulse levels of the first pulse signal S1 and the second pulse signal S2 are acquired. The pulse level is information indicating whether the first pulse signal S1 and the second pulse signal S2 are at the Hi level or the Lo level, and is used for determining the operating direction of the window glass 3. Here, since the falling edge Eb of the first pulse signal S1 is detected and the second pulse signal S2 is at the Lo level, it is determined that the window glass 3 is operating upward.

  On the other hand, the pulse width time n1 is used for determining whether the window glass 3 is caught. The sandwiching control unit 16 performs sandwiching determination based on the captured pulse width time n1. The sandwiching control unit 16 determines that sandwiching has not occurred if the pulse width time n1 is less than the threshold, and determines that sandwiching has occurred if the pulse width time n1 is equal to or greater than the threshold. Here, since the pulse width time n1 is less than the threshold value, it is determined that no jamming has occurred.

  As shown in FIG. 3, in the processing cycle T3 that comes after detecting the rising edge indicated by “Ec” in the drawing, it is determined that the opening / closing amount of the window glass 3 has become less than the specified value based on the determination result of the opening / closing amount determination. Suppose. At this time, the controller 5 reduces the rotational speed of the motor 7a and switches the operating state of the window glass 3 from the normal speed operation to the deceleration operation (slow control). Thereby, the window glass 3 is switched to a state where it slowly rises.

  During the deceleration operation, the sandwiching control unit 16 of this example performs the sandwiching determination using both the first pulse signal S1 and the second pulse signal S2. That is, not only the edges of “Ed” and “Ee” of the first pulse signal S1 in the figure but also the edges indicated by “Ef” and “Eg” of the second pulse signal S2 in the figure are used as triggers. Judgment is performed.

  Specifically, when a rising edge indicated by “Ef” in the drawing of the second pulse signal S2 is detected, the pinching determination (including the operation direction determination) is executed in the next processing cycle T4. At this time, the controller 5 acquires the pulse width time s1 of the second pulse signal S2 and the pulse levels of the first pulse signal S1 and the second pulse signal S2. Here, since it is confirmed that the first pulse signal S1 is at the Lo level and the second pulse signal S2 is at the Hi level, it is determined that the window glass 3 is operating upward. Further, the sandwiching control unit 16 performs the sandwiching determination based on the captured pulse width time s1. The sandwiching control unit 16 determines that sandwiching has not occurred if the pulse width time s1 is less than the threshold value, and determines that sandwiching has occurred if the pulse width time s1 is greater than or equal to the threshold value. Here, since the pulse width time s1 is less than the threshold value, it is determined that no jamming has occurred.

  Subsequently, when the falling edge indicated by “Eg” in the drawing of the second pulse signal S2 is detected, the pinching determination (including the operation direction determination) is executed in the next processing cycle T5. At this time, the controller 5 acquires the pulse width time s2 of the second pulse signal S2 and the pulse levels of the first pulse signal S1 and the second pulse signal S2, and performs the operation direction determination and the pinching determination in the same manner as described above. To do.

  Here, an example is assumed in which pinching occurs during the lapse of the pulse width time s2. Therefore, the pinching control unit 16 recognizes that the pulse width time s2 is equal to or greater than the threshold in the determination process of the processing cycle T5, and thereby determines that “pinching is present”. When the sandwiching control unit 16 recognizes that the sandwiching has occurred, the sandwiching control unit 16 reverses the motor 7a and starts the reversing operation of the window glass 3. Thereby, a user's hand, a finger, etc. can be protected from pinching of window glass 3.

  For example, in the case where the determination is made by using only the pulse edge of the first pulse signal S1 as a trigger, the insertion is detected at the processing cycle T6 using the edge of “Eh” in FIG. 3 as a trigger. That is, it takes time to detect pinching. On the other hand, in this example, the sandwiching determination is performed using both edges of the first pulse signal S1 and the second pulse signal S2 as triggers. Therefore, the detection timing (processing in a regular processing cycle) when performing the sandwiching determination is performed. It is possible to increase the number of executions). Therefore, the reversing operation can be started by detecting pinching earlier than in the past. In this respect, it is further advantageous to ensure the safety of the user.

  When the controller 5 of this example detects that the opening / closing amount of the window glass 3 is less than the specified value based on the first pulse signal S1 of the first pulse sensor 11, the opening / closing amount of the window glass 3 is the specified value. A deceleration operation for operating the window glass 3 at a speed lower than the operation speed at the above time is executed. Further, the sandwiching control unit 16 performs the sandwiching determination using the second pulse signal S2 of the second pulse sensor 12 when the window glass 3 performs the deceleration operation. Therefore, it is possible to increase the processing period for pinching determination in an area where pinching is likely to occur.

  The working body 10 of this example is a window glass 3 that is automatically lifted and lowered provided on the vehicle door 2. Therefore, in the case of this example, the pinching by the window glass 3 of the vehicle door 2 can be detected at an early stage.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
The pinching determination is not limited to being performed only during the auto-up operation, but may be performed when the switch unit 6 is manually raised.

The pinch determination may be performed when the window glass 3 is being lowered.
The sandwiching determination using the second pulse signal S2 is not limited to being performed only in the deceleration operation region, but may be performed in the normal operation speed region or the reverse operation region.

-Actuator 10 is not limited to window glass 3, but may change into other members, such as a sunroof, for example.
The pinch detection device 15 of this example is not limited to being applied to the power window device 4 and may be used for other devices and apparatuses.

  The second pulse sensor 12 is not limited to the sensor used to detect the operation direction, and is a sensor other than the first pulse sensor 11 and can output a pulse signal corresponding to the operation of the operating body 10. I just need it.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(A) In the pinching detection device, the controller that controls the operating body executes pinching determination based on the first pulse signal or the second pulse signal at a timing of a regular processing cycle. According to this configuration, it is possible to quickly detect the jamming in the controller that executes processing at a regular cycle.

  (B) In the pinching detection device, the pinching control unit takes into account the operating direction of the operating body when determining whether the operating body is pinched. According to this configuration, it is further advantageous to more accurately determine whether or not pinching has occurred.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Vehicle door, 3 ... Window glass which is an example of operating body, 5 ... Controller, 10 ... Operating body, 11 ... 1st pulse sensor, 12 ... 2nd pulse sensor, 16 ... Pinch control part, S1 ... first pulse signal, S2 ... second pulse signal.

Claims (3)

Pinch detection in which a first pulse signal is input from a first pulse sensor used to detect the amount of actuation of the working body, and the sandwiching of the working body during operation is detected by the sandwiching control unit based on the first pulse signal. In the device
The sandwiching control unit obtains a second pulse signal from a second pulse sensor used to detect the operating direction of the working body, and not only the sandwiching determination using the first pulse signal but also the second pulse signal. A pinching detection device that also performs pinching determination using the above. When the controller that controls the operating body detects that the operating amount of the operating body is less than a specified value based on the first pulse signal of the first pulse sensor, the operating amount of the operating body is specified. Executing a deceleration operation for operating the operating body at a speed lower than the operating speed when the value is greater than or equal to the value,
2. The pinching detection device according to claim 1, wherein the pinching control unit executes pinching determination using a second pulse signal of the second pulse sensor when the operating body performs the deceleration operation. The pinching detection device according to claim 1 or 2, wherein the operating body is a window glass that is automatically lifted and lowered provided on a vehicle door.

Images