JP5206430B2 - Power window control unit and power window control system - Google Patents

Description

  The present invention relates to a control unit that opens and closes a power window of a vehicle by detecting an operation state of an operation switch and driving an actuator, and a control system including a plurality of the control units.

  In general, in a configuration for driving a power window mounted on a vehicle, a motor (actuator) that drives the window and a control unit that controls the motor are often separate. In addition, when a vehicle is submerged due to an accident, etc., the passenger is allowed to escape from the vehicle. There are some which make an announcement (see, for example, Patent Document 1). Further, Patent Document 2 discloses a configuration for the purpose of reliably opening a power window by a user operation even when a vehicle is submerged.

JP-A-11-206900 JP 2000-34861 A

  However, recently, a control device in which a motor and a control unit are integrated is sometimes used for the purpose of reducing wiring, and in such a case, the control device is provided with a waterproof structure. Then, the submergence detection sensor has to be externally attached to the control device, and there is a problem that wiring for outputting a detection signal to the control device increases.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power window control unit capable of detecting submergence of a vehicle without increasing wiring even when an actuator and a control unit have an integral waterproof structure. And a power window control system comprising a plurality of control units.

  According to the power window control unit of the first aspect, the assembled electrode is connected in parallel to the contact point of the operation switch and is opposed via a predetermined gap. Then, the continuity detecting means of the control device outputs a continuity detection signal to the control unit when detecting that two or more sets of conductive electrodes are conductive based on the change in the terminal voltage of the operation switch. That is, when water enters the operation switch part due to the submergence of the vehicle, the assembled electrode is conducted by moisture and the terminal voltage of the operation switch changes, so that the control unit is given a conduction detection signal by the conduction detection means. Can detect submersion. Therefore, even when the control device has a waterproof structure incorporating the actuator and the control unit, submersion can be detected based on the change in the terminal voltage of the operation switch, so the submersion detection sensor sends a detection signal to the control device. There is no need to provide extra wiring for output.

  According to the power window control unit of the second aspect, the threshold voltage set in the conduction detection comparator constituting the conduction detection means is set to a voltage higher than the threshold voltage set in the operation detection comparator. That is, when the assembled electrode is conducted by water that has entered the operation switch part, the resistance value is higher than that of a metal-like conductor, so the terminal voltage of the operation switch is the value when the operation switch is operated. Higher voltage. Therefore, if the comparator with the threshold voltage set as described above is used, it is possible to detect the operation of the operation switch and detect the submersion according to the voltage change of the common signal terminal.

  According to the power window control system of claim 3, when the submergence detection signal is transmitted from one or more control devices, the host controller controls the power window to the control device that has not transmitted the submergence detection signal. The control device that transmits the opening command and receives the opening command opens the power window. Therefore, when a submergence accident occurs in the vehicle, it is possible to assist the occupant to escape from the vehicle more easily.

  According to the power window control system of claim 4, the host controller controls the side window on the passenger seat side when any control device corresponding to the side window on the driver seat side transmits a submergence detection signal. An open command is transmitted to the corresponding control device.

  According to the power window control system of the fifth aspect, when the control device corresponding to the side window on the passenger seat transmits all the submergence detection signals, the host control device An opening command is transmitted to the control device corresponding to the window. Therefore, the occupant can escape from the side of the vehicle that has not been submerged.

  According to the power window control system of the sixth aspect, if the control device corresponding to the roof window does not transmit a submergence detection signal, the host control device transmits an opening command to the control device. That is, if the roof side of the vehicle is not yet submerged, the roof window can be opened and the occupant can escape.

The figure which is a 1st Example of this invention and shows the structure centering on a power window control unit The figure which is 2nd Example of this invention, and shows the control system comprised by several control unit and door ECU flowchart

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a diagram showing a configuration centering on a power window control unit mounted on a vehicle. A power window control unit (hereinafter simply referred to as a control unit) 1 includes a switch box 2 and a power window control device (hereinafter simply referred to as a control device) 3. The switch box 2 is provided with three normally open type operation switches 4 to 6 (SW1 to 3), and one of the contact points of these operation switches 4 to 6 is commonly connected to the ground (body earth). Has been. The other contacts of the operation switches 4 to 6 are connected to input terminals of the control device 3, respectively. These operation switches 4, 5, and 6 correspond to operations of “AUTO”, “UP”, and “DOWN”, respectively.

  A set of electrodes 7 (a, b) to 9 (a, b) is connected in parallel to each contact point of the operation switches 4 to 6, and the open ends of the electrodes, for example, the electrodes 7a and 7b, They are arranged to face each other with a predetermined gap (for example, about several mm). The electrodes 7 to 9 are in a state where the wiring pattern is exposed. Further, the gap length of each of the assembled electrodes 7 to 9 is set to be approximately the same as the gap length between the contacts of the operation switches 4 to 6, for example.

  The control device 3 includes a control IC 10 and a motor (DC motor) 11 that is an actuator for opening and closing a power window, and these are integrally provided with a waterproof structure (as opposed to this, the switch box 2 Is non-waterproof). The control IC 10 includes a control unit 12 constituted by a microcomputer, and comparators 13 to 18 (CP1 to 6) with hysteresis for detecting the operation of the operation switches 4 to 6 and the conduction state of the electrodes 7 to 9. I have.

  The non-inverting input terminals of the comparators 13 and 16 are commonly connected to the input terminal AUTO, and are pulled up to the power source + B through the resistance element 19 (R1). The non-inverting input terminals of the comparators 14 and 17 are commonly connected to the input terminal UP and pulled up to the power source + B through the resistance element 20 (R2). The non-inverting input terminals of the comparators 15 and 18 are Are commonly connected to the input terminal DOWN and pulled up to the power source + B via the resistance element 21 (R3).

  The reference voltage Vref1 is applied to the inverting input terminals of the comparators 13 to 15 (operation detection means, operation detection comparator), and the reference voltage Vref2 is applied to the inverting input terminals of the comparators 16 to 18 (conduction detection comparator). It has been. The magnitude relationship between these reference voltages is set so that Vref2> Vref1. The output terminals of the comparators 13 to 15 are connected to the input terminal of the control unit 12, and the output terminals of the comparators 16 to 18 are connected to the input terminal of the control unit 12 via the three-input OR gate 22. ing. The comparators 16 to 18 and the OR gate 22 constitute a conduction detecting means 23.

  A communication line of LIN, which is a kind of in-vehicle LAN protocol, is connected between the door ECU (or body ECU) 24 and the control device 3 via the switch box 2 and communicates with the control unit 12. Is configured to do. Note that the communication line does not necessarily have to pass through the switch box 2.

Next, the operation of this embodiment will be described. In a normal state, when any of the operation switches 4 to 6 arranged in the switch box 2 is turned on by a vehicle occupant, the respective contacts are closed, and the levels of the input terminals AUTO, UP, and DOWN are high. Changes from low to low. Accordingly, the output levels of the comparators 13 to 15 also change from high to low, so that the control unit 5 drives the motor 11 corresponding to the switches 4 to 6 that are turned on.
That is, when the switch 5 corresponding to “UP” is turned on, the motor 11 is driven to close the power window, and when the switch 6 corresponding to “DOWN” is turned on, the power window is opened. Thus, the motor 11 is driven in reverse. When the switch 4 corresponding to “AUTO” is turned on, the motor 11 is driven so as to open the power window to the opening position set in advance by the occupant.

  Here, it is assumed that the vehicle is submerged due to an accident or the like. At this time, water does not enter the control device 3 having a waterproof structure, but water enters the switch box 2 having a non-waterproof structure. And when the water which penetrate | invaded the space | gap part of the electrodes 7-9 connected in parallel with each operation switch 4-6 reaches | attains, these electrodes 7-9 will conduct | electrically_connect through the water | moisture content. Since the conduction resistance in this case is higher than the conduction resistance when the operation switches 4 to 6 are turned on, the degree to which the levels of the input terminals AUTO, UP, and DOWN of the control device 3 are reduced is small.

  When these states are detected by the comparators 16 to 18 and all of these output terminals change to low level, the output level of the OR gate (negative logic AND) 22 changes from high to low. Thereby, the control part 12 can detect that the switch box 2 part was submerged, and will transmit a submergence detection signal with respect to door ECU24, if the state is detected. When the door ECU 24 receives the submergence detection signal transmitted from the control device 3, it determines whether or not the control device 3 disposed in the power window of the other part of the vehicle similarly transmits the submergence detection signal. After that, in order to let the vehicle occupant escape from the vehicle, processing is performed to open the optimum power window (for details, see the second embodiment).

  As described above, according to the present embodiment, the paired electrodes 7 to 9 facing each other through the predetermined gap are connected in parallel to the contacts of the operation switches 4 to 6, and the continuity detecting means 23 of the control device 3 Terminal voltages of the switches 4 to 6: When it is detected that all the assembled electrodes 7 to 9 are turned on based on voltage changes of the input terminals AUTO, UP, and DOWN, a conduction detection signal is output to the control unit 12. Therefore, even when the control device 3 has an integrated waterproof structure incorporating the motor 11 and the control unit 12, it is possible to detect submergence based on the change in the terminal voltage of the operation switches 4 to 6, so When these sensors are arranged independently, it is not necessary to provide an extra wiring for the sensor to output a detection signal to the control device.

  Since the threshold voltage Vref2 set in the comparators 16 to 18 constituting the continuity detecting means 23 is set to a voltage higher than the threshold voltage Vref1 set in the comparators 13 to 15, the voltage change of the common signal terminal is caused. Accordingly, it is possible to detect operations in the switches 4 to 6 and detect submersion. Furthermore, since the submergence of the vehicle is detected according to the AND conditions of the comparators 16 to 18, it is possible to prevent erroneous detection when only one of the assembled electrodes 7 to 9 is conducted due to condensation or the like.

(Second embodiment)
2 and 3 show a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. Hereinafter, different parts will be described. In the second embodiment, when the power window control unit 1 of the first embodiment is disposed in each part of the vehicle, each control unit 1 communicates with a door ECU (higher-order control device) 24, whereby each control unit 1 The case where a power window is controlled according to the condition of submergence detection in is shown. Actually, the number of operation switches arranged in the switch box 2 may differ depending on which window of the vehicle each control unit 1 is arranged corresponding to.

  Each control unit 1 includes a side window (LF) on the passenger seat side, a side window (LR) on the rear side of the passenger seat, a side window (RF) on the driver seat side, a side window (RR) on the rear side of the driver seat, Arranged corresponding to the sunroof window (T). In FIG. 2, for convenience of illustration, each control device 3 is shown as being directly connected to the door ECU 24.

  Next, the operation of the second embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing the contents of processing performed between the door ECU 24 and each control device 3. The door ECU 24 requests each control device 3 to transmit the presence / absence of submergence detection (step S1), and first determines whether or not the control device 3T corresponding to the sunroof has detected submersion (step S2). ). If the control device 3T detects submergence (yes), the process proceeds to step S6. If submergence is not detected (none), in other steps S3 to S7, whether or not submergence is detected Determine.

  That is, in step S3, it is determined whether or not submersion has been detected in all four seats in the front, rear, left, and right of the vehicle. If so (if present), the door ECU 24 opens the roof window to the control device 3T. A command for opening is transmitted (step S10). And control device 3T will control to drive motor 11 (T) and open a roof window, if the opening command is received. That is, in this case, since only the roof portion of the vehicle is not yet submerged, it is optimal to open the roof window in order to allow the vehicle occupant to escape from the vehicle.

  If submergence is not detected for all seats in step S3 (no), it is next determined whether submergence is detected for the front seats of the vehicle, that is, the driver seat and the passenger seat (step S3). S4). Here, if both the driver's seat and the passenger seat are submerged (yes), the process proceeds to step S10 and the roof window is opened. If neither the driver's seat nor the passenger seat is submerged (no), the next step is to determine whether submersion has been detected for the rear seats of the vehicle, that is, the rear seats of the driver's seat and front passenger seat ( Step S5), if both are submerged (Yes), the process proceeds to Step S10.

  If both the left and right seats of the front seat and the rear seat of the vehicle are not submerged (step S5: None), the right seat of the vehicle, that is, the driver seat and the rear seat, is submerged. It is determined whether or not it has been detected (step S6). If these are submerged (yes), the door ECU 24 transmits a command to the control devices 3LF and 3LR to open the left seat of the vehicle on the opposite side, that is, the passenger seat and the rear seat (step). S8).

  If the right seat of the vehicle is not submerged (step S6: No), the door ECU 24 determines whether submersion is detected for the left seat, that is, the passenger seat and the rear seat (step S7). ). If these are submerged (if present), a command is transmitted to the control devices 3RF and 3RR to open the left seat of the opposite vehicle (step S9).

As described above, according to the second embodiment, when the submersion detection signal is transmitted from one or more control devices 3, the door ECU 24 detects the power window with respect to the control device 3 that has not transmitted the submersion detection signal. The control device 3 that transmits the opening command and receives the opening command controls to open the power window. Therefore, when a submergence accident occurs in the vehicle, it is possible to assist the occupant to escape from the vehicle more easily.
If the control device 3T corresponding to the roof window does not transmit a submergence detection signal, the door ECU 24 transmits an opening command to the control device 3T, so that the roof window that has not been submerged is opened. The passenger can escape.

  The door ECU 24 opens to the control devices 3LF and 3LR corresponding to the side window on the passenger seat when both the control devices 3RF and 3RR corresponding to the side window on the driver's seat transmit a submergence detection signal. In contrast, when the control devices 3LF and 3LR are both transmitting a submergence detection signal, an opening command is transmitted to the control devices 3RF and 3RR. Therefore, the occupant can escape from the side of the vehicle that has not been submerged.

The present invention is not limited to the embodiments described above and shown in the drawings, and the following modifications or expansions are possible.
The operation switch only needs to correspond to at least “UP” and “DOWN”, and may be configured such that these operations can be performed by one switch. Then, the detection of submergence may be performed when conduction is detected in at least two or more assembled electrodes.
You may apply to the vehicle which is not provided with the roof window.

  In the drawings, 1 is a power window control unit, 3 is a power window control device, 4 to 6 are operation switches, 7 to 9 are electrodes (assembled electrodes), 11 is a motor (actuator), 12 is a control unit, and 13 to 15 are Comparator (operation detection means, operation detection comparator), 16 to 18 are comparators (conduction detection comparator), 23 is conduction detection means, and 24 is a door ECU (high-order control device).

Claims (6)

One or more operation switches operated to open and close a power window disposed in the vehicle, and a control unit that detects the operation state of the operation switch and drives a corresponding actuator to open and close the power window; In the power window control unit composed of
The actuator and the control unit are configured as a control device that is integral and waterproof.
The operation switch includes a pair of electrodes that are connected in parallel to the contact of the switch and face each other with a predetermined gap therebetween.
The controller is
When detecting that the switch is operated based on a change in the terminal voltage of the operation switch, operation detection means for outputting an operation detection signal to the control unit;
A power detecting unit configured to output a continuity detection signal to the control unit when detecting that two or more sets of the paired electrodes are conductive based on a change in a terminal voltage of the operation switch; Window control unit.
The operation detection unit and the conduction detection unit include an operation detection comparator and a conduction detection comparator that compare a terminal voltage of the operation switch with a threshold voltage for determination.
2. The power window control unit according to claim 1, wherein the threshold voltage set in the continuity detection comparator is set to a voltage higher than the threshold voltage set in the operation detection comparator. A plurality of power window control units according to claim 1 or 2, and a host controller configured to be communicable with the plurality of controllers.
The plurality of control devices, when given the continuity detection signal, transmits a submergence detection signal to the host control device,
When the submergence detection signal is transmitted from one or more control devices, the host controller transmits a power window opening command to a control device that has not transmitted the submergence detection signal,
The control device that has received the opening command drives the actuator to open the power window.   The upper control device transmits the opening command to the control device corresponding to the side window on the passenger seat when all the control devices corresponding to the driver side window are transmitting the submergence detection signal. The power window control system according to claim 3.   The upper control device transmits the opening command to the control device corresponding to the side window on the driver's seat when any of the control devices corresponding to the side window on the passenger's seat transmits the submergence detection signal. 5. The power window control system according to claim 3, wherein the power window control system is a power window control system. When one of the power window control units is arranged corresponding to the roof window,
6. The upper control apparatus according to claim 3, wherein if the control apparatus corresponding to the roof window does not transmit the submergence detection signal, the upper control apparatus transmits the opening command to the control apparatus. The described power window control system.

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