JP2010100075A - Collision detection device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collision detection device for a vehicle capable of detecting generation of collision that there is possibility that a chamber member and a pressure sensor for detecting collision are failed on a vehicle bumper with high accuracy. <P>SOLUTION: The collision detection device for the vehicle is provided with a detection unit 7 having the chamber member 71 arranged on a front surface of a bumper reinforcement 4 in the vehicle bumper 2 and formed with a chamber space 71a at the inside; and the pressure sensor 72 for detecting pressure variation in the chamber space 71a. The collision of a pedestrian or the like to the vehicle bumper 2 can be detected based on the pressure detection result by the pressure sensor 72. Whereas, a pressure-sensitive sensor 8 provided separately from the pressure sensor 72 outputs a high level signal when predetermined collision is generated on the vehicle bumper 2, and a pedestrian protection device ECU 10 as a failure determination means determines failure of the detection unit 7 based on the signal outputted from the pressure-sensitive sensor 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle collision detection device that detects a collision of a pedestrian or the like with a vehicle.

  Conventionally, regarding vehicle safety, it is required not only to ensure the safety of a vehicle occupant during an accident, but also to reduce damage to the pedestrian when the pedestrian collides with the vehicle. Therefore, when a collision of a pedestrian with a vehicle is detected and a pedestrian protection device such as an active hood or a cowl airbag is activated, an injury value (walking) that a pedestrian who collides with the vehicle and falls into the hood Have been proposed to reduce the impact received by a person.

For example, in Japanese Patent Laid-Open No. 2006-117157 (Patent Document 1), a chamber member is disposed in front of a bumper reinforcement in a vehicle bumper to detect a collision, and a pressure sensor detects a change in pressure in the chamber space. There has been proposed a collision detection device configured to detect a collision of a pedestrian or the like with a vehicle bumper. When a pedestrian or the like collides with the vehicle bumper and the pedestrian protection device is activated, it is necessary to replace or repair a pedestrian protection device, a collision detection unit including a chamber member and a pressure sensor.
JP 2006-117157 A

  However, even if a collision occurs in the vehicle bumper, if the pedestrian protection device is not activated, the driver recognizes the necessity for replacement or maintenance of the pressure sensor and the chamber member constituting the collision detection unit. There is a risk that the failure of the collision detection unit may be left unattended. If the use of the vehicle is continued with the failure of the collision detection unit left unattended, the pedestrian protection device may not operate normally when the pedestrian actually collides. For example, in the case of a collision caused by the outside of the operating speed range of the pedestrian protection device, for example, when a heavy object collides with the vehicle or a light object collides at high speed, the pedestrian protection device does not operate, but the collision energy is large. Therefore, there is a possibility that the pressure sensor or the chamber member may break down.

  Here, in order to detect the failure state of the chamber member, it may be considered that the failure detection state is detected if the output of the pressure sensor exceeds a predetermined value outside the range of the operating speed of the pedestrian protection device. However, when the vehicle collides widely in the vehicle width direction, the volume change amount of the chamber member is large, and the output of the pressure sensor may be high.

  The present invention has been made in view of the above-described problems, and is used for a vehicle that can detect with high accuracy that a collision that may cause a failure of a chamber member or a pressure sensor for collision detection has occurred on a vehicle bumper. An object is to provide a collision detection device.

  Hereinafter, each means suitable for solving the above-described problems will be described with additional effects and the like as necessary.

1. A detection unit having a chamber member disposed in front of a bumper reinforcement in a vehicle bumper and having a chamber space formed therein, and a pressure sensor for detecting a pressure change in the chamber space, the pressure sensor In the vehicle collision detection device configured to detect a collision with the vehicle bumper based on a pressure detection result,
A collision sensor that is provided separately from the pressure sensor and outputs a signal when a predetermined collision occurs in the vehicle bumper;
A vehicle collision detection device comprising: failure determination means for determining failure of the detection unit based on a signal from the collision sensor.

  According to the means 1, a detection unit having a chamber member disposed in front of the bumper reinforcement in the vehicle bumper and having a chamber space formed therein and a pressure sensor for detecting a pressure change in the chamber space is provided. A collision of a pedestrian or the like to the vehicle bumper can be detected based on the pressure detection result by the pressure sensor. On the other hand, the collision sensor provided separately from the pressure sensor outputs a signal when a predetermined collision occurs in the vehicle bumper, and the failure determination means detects the failure of the detection unit based on the signal output from the collision sensor. Determine. Therefore, it is possible to detect with high accuracy that there has been a collision with the vehicle bumper that may cause the detection unit to fail, and to prevent the vehicle from being used continuously with the detection unit being in failure. .

  2. 2. The vehicle collision detection device according to claim 1, wherein the collision sensor is disposed over the entire vehicle width direction of the vehicle bumper.

  According to the means 2, since the collision sensor is disposed over the entire vehicle width direction of the vehicle bumper, a signal is reliably output when a predetermined collision occurs at any position in the vehicle width direction of the vehicle bumper. The failure of the detection unit can be determined by the failure determination means.

  3. The vehicle collision detection device according to claim 1 or 2, wherein the collision sensor is a pressure-sensitive sensor that outputs a signal when a pressing force is applied.

  According to the means 3, since the collision sensor is constituted by a pressure sensor that outputs a signal when a pressing force is applied, when the vehicle bumper has a predetermined collision, the pressure sensor is reliably applied with the pressing force. A signal is output to the detection unit, and the failure determination means can determine the failure of the detection unit.

  4). 4. The vehicle collision detection device according to claim 3, wherein the collision sensor is disposed between the chamber member and the bumper reinforcement.

  According to the means 4, when the vehicle bumper has a predetermined collision, the chamber member is crushed in the vehicle longitudinal direction by the collision object, and the collision sensor disposed between the chamber member and the bumper reinforcement is the bumper reinforcement. The signal is reliably output by being pressed to the ment side.

  5. 4. The vehicle collision detection device according to claim 3, wherein the collision sensor is disposed on the vehicle front side of the chamber member.

  According to the means 5, since the collision sensor is disposed on the vehicle front side of the chamber member, when the vehicle bumper has a predetermined collision, the chamber member is crushed in the vehicle front-rear direction by the collision object, and the vehicle of the chamber member A collision sensor disposed on the front side is pressed to the bumper reinforcement side through the chamber member, and a signal is reliably output.

  6). The vehicle collision detection device according to claim 4 or 5, wherein the chamber member has a housing groove for disposing the collision sensor.

  According to the means 6, since the chamber member has the receiving groove for arranging the collision sensor, the collision sensor can be easily positioned and arranged with respect to the chamber member. It is possible to reduce the number of mounting steps and prevent the collision sensor from falling off.

  7). The vehicle according to any one of means 3 to 6, wherein the pressure-sensitive sensor is a long pressure-sensitive sensor that is substantially the same length as the chamber member and extends in the vehicle width direction. Collision detection device.

  According to the means 7, since the pressure-sensitive sensor is constituted by a long pressure-sensitive sensor which is substantially the same length as the chamber member and extends in the vehicle width direction, the vehicle width of the vehicle bumper provided with the chamber member. When a predetermined collision occurs at any position in the direction, a pressure is reliably applied to the pressure sensor and a signal is output.

8). 8. A means according to claim 1, further comprising a notifying means for notifying the failure of the detection unit when the failure determination means determines that the detection unit has failed. Vehicle collision detection device.

  According to the means 8, the collision sensor provided separately from the pressure sensor outputs a signal when a predetermined collision occurs in the vehicle bumper, and the failure determination means is based on the signal output from the collision sensor. When the failure of the detection unit is determined and the notification means (for example, a warning light on the driving panel) determines that the detection unit has failed by the failure determination means, Can be surely notified. Therefore, it is possible to prevent the driver or the like from continuing to use the vehicle while the detection unit is broken.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle collision detection device according to the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram showing a vehicle collision detection apparatus 1 according to an embodiment of the present invention in a plan view. 2A is a cross-sectional view of the main part of the vehicle collision detection device 1 seen from the side, and FIG. 2B is a view of the vehicle collision detection device 1 in which a pedestrian or the like collides with the vehicle bumper 2 from the side. FIG. FIG. 3 is a perspective view of the pressure-sensitive sensor 8 according to the embodiment. FIG. 4 is a block diagram of the pedestrian protection apparatus ECU10. FIG. 5 is a flowchart showing the flow of collision detection processing by the pressure sensor 72. FIG. 6 is a flowchart showing a flow of failure detection processing by the pressure sensor 8.

  As shown in FIG. 1, the vehicle collision detection apparatus 1 includes a detection unit 7 (chamber member 71 and pressure sensor 72) disposed in the vehicle bumper 2, a pressure sensor 8, and a pedestrian protection apparatus ECU10. It is comprised by. The pressure sensor 8 constitutes a collision sensor of the present invention, and the pedestrian protection device ECU 10 constitutes a failure determination means.

  As shown in FIG. 1, the vehicle bumper 2 is mainly composed of a bumper cover 3, a bumper reinforcement 4, a side member 5, an absorber 6, and a chamber member 71.

  The bumper cover 3 extends in the vehicle width direction (left-right direction) at the front end of the vehicle, and is a resin (for example, polypropylene) attached to the vehicle body so as to cover the bumper reinforcement 4, the side member 5, the absorber 6, and the chamber member 71. A cover member.

  The bumper reinforcement 4 is a metal structural member that is disposed in the bumper cover 3 and extends in the vehicle width direction. As shown in FIG. A hollow member having a letter-shaped cross section.

  The side members 5 are a pair of metal members that are positioned in the vicinity of the left and right side surfaces of the vehicle and extend in the vehicle front-rear direction, and the bumper reinforcement 4 described above is attached to the front end thereof.

  As shown in FIG. 2A, the absorber 6 is a foamed resin member that extends in the vehicle width direction and is attached to the lower side of the bumper reinforcement front surface 4 a in the bumper cover 3. Demonstrate.

  The detection unit 7 includes a chamber member 71 and a pressure sensor 72.

  As shown in FIG. 2A, the chamber member 71 is a hollow member made of a synthetic resin such as substantially box-like polyethylene extending in the vehicle width direction and attached to the upper side of the bumper reinforcement front surface 4 a in the bumper cover 3. It is. The chamber member 71 extends in the vehicle width direction to form a substantially hermetically sealed chamber space 71 a surrounded by a wall having a thickness of several millimeters, and is disposed on the front surface of the bumper reinforcement 4. An accommodation groove 71 b extending in the vehicle width direction for accommodating the pressure sensor 8 is formed on the rear end surface of the chamber member 71. The chamber member 71 can be manufactured by blow molding using, for example, LDPE (low density polyethylene) as a raw material.

  The pressure sensor 72 is a sensor device that can detect a gas pressure, and is configured to be able to detect the pressure of air in the chamber member 71 via a pressure introduction pipe (not shown). The pressure sensor 72 outputs a voltage proportional to the pressure, and is electrically connected to the pedestrian protection apparatus ECU10 via the pressure sensor signal line 10a.

  The pressure-sensitive sensor 8 is a sensor that is provided separately from the pressure sensor 72 and functions as a collision sensor that outputs a signal when a predetermined collision occurs in the vehicle bumper 2. It is arranged over. That is, the pressure-sensitive sensor 8 is constituted by a long pressure-sensitive sensor that is substantially the same length as the chamber member 71 and extends in the vehicle width direction, and is housed in the housing groove 71b on the rear end surface of the chamber member 71. And disposed between the chamber member 71 and the bumper reinforcement 4.

  More specifically, as shown in FIG. 3, the pressure-sensitive sensor 8 has a substantially circular cross-section hollow insulator 81 and a void 82 and a cross-section hollow insulator 81 on the inner surface of the cross-section hollow insulator 81. And two electrode wires 83 arranged in a spiral shape along the longitudinal direction. The restoring rubber is silicon rubber, and the restoring plastic can be manufactured using polyethylene as a raw material, and the electrode wires 83 are fixed in a state where they are not in electrical contact with each other. A weak current flows through the electrode wire 83. When the electrode wire 83 comes into contact with the external pressing force, a short-circuit current flows, and a change in the current increase is output as a high level signal.

  The pedestrian protection device ECU10 is an electronic control device for performing start-up control of a pedestrian protection device 16 (for example, a known pedestrian protection airbag or hood flip-up device). As shown in FIG. CPU (Central Processing Unit) 11, I / F (Input or Output Interface) 12, EEPROM (Electrically Erasable and Programmable Read Only Memory) 13, RAM And ROM (not shown). The pressure sensor 72, the pressure sensor 8, the display means (warning light) 14, and the pedestrian protection device 16 are connected to the I / Fs 12a to 12d, respectively, and configured to input / output signals to / from the CPU 11. ing.

  Further, the pedestrian protection device ECU10 is configured such that a signal output from the pressure sensor 72 is input via the pressure sensor signal line 10a. The pedestrian protection device ECU 10 executes processing for determining whether or not a pedestrian (ie, a human body) has collided with the vehicle bumper 2 based on the pressure detection result of the pressure sensor 72.

  Next, the collision detection process by the pressure sensor 72 in the vehicle collision detection apparatus 1 of the present embodiment will be described with reference to the flowchart of FIG. In the vehicle bumper 2 to which the detection unit 7 of this embodiment is assembled, the bumper cover 3 covers the chamber member 71 and the absorber 6 to form the outer surface of the vehicle bumper 2 as shown in FIG. ing.

  5, the pedestrian protection apparatus ECU10 takes in the pressure detection value by the pressure sensor 72 through the pressure sensor signal line 10a (step 100. Hereinafter, step 100 is abbreviated as S100. Other steps are also shown). The same.) For example, when a pedestrian or the like collides with the vehicle bumper 2, the chamber member 71 is pressed via the bumper cover 3, and the chamber member 71 is deformed and crushed in the vehicle front-rear direction. For this reason, the gas pressure in the chamber space 71a increases and is introduced into the pressure sensor 72 via the pressure introduction pipe. And the pressure detection value by the pressure sensor 72 is taken into pedestrian protection apparatus ECU10 via the signal wire | line 10a.

  Next, the acquired pressure detection value ΔP is compared with a threshold value th (S110). When ΔP is less than or equal to the threshold th (S110: NO), the processes of S100 to S110 are repeated. On the other hand, when ΔP is larger than the threshold th (S110: Yes), it is determined that the pedestrian has collided and the pedestrian protection device 16 is activated (S120). In addition, you may comprise so that determination whether the pedestrian collided may be performed based on the pressure detection value by the pressure sensor 72, and the vehicle speed detection value from a wheel speed sensor (not shown).

  Next, failure detection processing of the detection unit 7 in the vehicle collision detection device 1 of the present embodiment will be described with reference to the flowcharts of FIG.

  When the vehicle bumper 2 has a predetermined collision, as shown in FIG. 2B, the collision object presses the vehicle bumper 2, presses the chamber member 71 through the bumper cover 3, and the chamber member 71. The pressed portion is deformed and crushed in the longitudinal direction of the vehicle, and the chamber member 71 presses the pressure sensor 8. The pressure sensor 8 is pressed by the chamber member 71 and is in contact with the bumper reinforcement 4, which is a hard material, and is sandwiched between the chamber member 71 and the bumper reinforcement 4 and is crushed. A high-level signal that is output when the electrode wire 83 inside the pressure-sensitive sensor 8 contacts and is turned on is output.

  As shown in the flowchart of FIG. 6, the pedestrian protection apparatus ECU10 first determines whether or not the pressure sensor 8 is on (S200). When the pressure sensor 8 is not on (S200: No), that is, when the high level signal is not output from the pressure sensor 8, S200 is repeated.

  When the pressure sensor 8 is on (S200: Yes), that is, when a high level signal is input via the pressure sensor signal line 10b and the I / F 12b, it is determined that the detection unit 7 is in failure. (S210), a lighting signal is output to the display means (warning lamp) 14 of the operation panel via the I / F 12c. As a result, a warning lamp (not shown) provided in the passenger compartment is turned on, and the driver or the like is reliably notified of the failure of the detection unit 7. Accordingly, the driver or the like can recognize the failure of the detection unit 7 and take actions such as bringing the vehicle into a maintenance shop in order to repair the detection unit 7, and the vehicle can be used while the detection unit 7 is broken. It can be prevented from continuing.

  Further, failure information indicating that the detection unit 7 has a permanent failure is stored in the EEPROM 13. The failure information stored in the EEPROM 13 is saved even when the ignition switch is turned off. When the ignition switch is turned on after that, the lighting signal is displayed on the operation panel via the I / F 12c based on the failure information stored in the EEPROM 13. It is output to the means (warning lamp) 14. Accordingly, even after turning off the ignition switch of the vehicle, the driver or the like can reliably recognize the failure of the detection unit 7 and replace the chamber member 71 and the pressure sensor 72.

  The step of S200 functions as a failure determination unit of the present invention, and the step of S220 and the display unit (warning lamp) 14 function as a notification unit.

  As is clear from the above detailed description, according to the present embodiment, the vehicle collision detection device 1 is disposed in front of the bumper reinforcement 4 in the vehicle bumper 2 and the chamber space 71a is formed therein. A detection unit 7 having a chamber member 71 and a pressure sensor 72 for detecting a pressure change in the chamber space 71a, and detecting a collision of a pedestrian or the like with the vehicle bumper 2 based on a pressure detection result by the pressure sensor 72. be able to. On the other hand, the pressure sensor 8 provided separately from the pressure sensor 72 outputs a high level signal when a predetermined collision occurs in the vehicle bumper 2, and the pedestrian protection device ECU 10 as the failure determination means Based on the signal output from the pressure sensor 8, the failure of the detection unit 7 is determined. Therefore, it is possible to detect with high accuracy that there has been a collision with the vehicle bumper 2 that may cause the detection unit 7 to fail, and to prevent the use of the vehicle from continuing while the detection unit 7 has failed. be able to.

  Since the pressure-sensitive sensor 8 is disposed over the entire vehicle width direction of the vehicle bumper 2, a high-level signal is surely generated regardless of the position where the vehicle bumper 2 is positioned in the vehicle width direction. The failure is detected and the failure of the detection unit 7 can be determined by the failure determination means.

  The pressure sensor 8 that outputs a signal by applying a pressing force surely outputs a high level signal when the vehicle bumper 2 has a predetermined collision, and the failure determination means determines whether the detection unit 7 has failed. can do.

  When a predetermined collision occurs in the vehicle bumper 2, the chamber member 71 is crushed in the vehicle longitudinal direction by the collision object, and the pressure sensor 8 disposed between the chamber member 71 and the bumper reinforcement 4 is used as the bumper reinforcement. It is possible to reliably output a high level signal by being pressed toward the mentment 4 side.

  Since the pressure-sensitive sensor 8 is disposed on the vehicle front side of the chamber member 71, when the vehicle bumper 2 has a predetermined collision, the chamber member 71 is crushed in the vehicle front-rear direction by the collision object, and the vehicle of the chamber member 71 The pressure-sensitive sensor 8 disposed on the front side is pressed to the bumper reinforcement 4 side via the chamber member 71, so that a high level signal can be reliably output.

  Further, since the chamber member 71 has the accommodating groove 71b for disposing the pressure sensor 8, the pressure sensor 8 can be easily positioned and disposed with respect to the chamber member 71. It is possible to reduce the man-hours for mounting the pressure sensor 8 and prevent the pressure sensor 8 from falling off.

  Further, since the pressure-sensitive sensor 8 is formed in a long shape extending substantially in the vehicle width direction with the same length as the chamber member 71, any position in the vehicle width direction of the vehicle bumper 2 in which the chamber member 71 is provided. Even when a predetermined collision occurs, a pressure is reliably applied to the pressure sensor 8 and a signal is output.

  The pedestrian protection device ECU10 determines the failure of the detection unit 7 based on the signal output from the pressure sensor 8, and the warning lamp 14 on the driving panel is determined to have a failure of the detection unit 7. By turning on the light by the lighting signal from the pedestrian protection device ECU10, the failure of the detection unit 7 can be reliably notified to the driver of the vehicle. Therefore, it is possible to prevent the driver or the like from continuing to use the vehicle while the detection unit 7 is broken.

  Next, a modification of the above embodiment will be described with reference to FIG. FIG. 7A is a cross-sectional view of a main part of a vehicle collision detection apparatus 1 according to a modification of the embodiment as viewed from the side, and FIG. 7B is a vehicle collision detection in which a pedestrian or the like collides with the vehicle bumper 2. It is principal part sectional drawing which looked at the apparatus 1 from the side.

  In the above embodiment, as shown in FIG. 3, the pressure-sensitive sensor 8 is arranged between the chamber member 71 and the bumper reinforcement 4, but in this modification, the pressure-sensitive sensor 8 is a chamber member. 71 is arranged on the vehicle front side.

  In the configuration of this modification, when a predetermined collision occurs in the vehicle bumper 2, the bumper cover 3 in the vehicle bumper 2 presses the pressure sensor 8 and the chamber member 71 as shown in FIG. Then, the chamber member 71 is crushed in the vehicle front-rear direction, and the pressure-sensitive sensor 8 is pressed to the bumper reinforcement 4 side via the chamber member 71 and is sandwiched between the bumper cover 3 and the bumper reinforcement 4. It collapses. Then, the electrode wire 83 inside the pressure sensor 8 comes into contact and is turned on, and a high level signal is output to the pedestrian protection device ECU 10 via the pressure sensor signal wire 10b. Therefore, similarly to the above-described embodiment, the pedestrian protection apparatus ECU 10 as the failure determination unit can determine the failure of the detection unit 7 based on the signal output from the pressure sensor 8.

  The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

  For example, the shape and arrangement of the chamber member 71 are not limited to the above-described embodiment. Further, the pressure-sensitive sensor 8 may be a sensor that is provided separately from the pressure sensor 72 and that can function as a collision sensor that detects a predetermined collision. The arrangement and the like are not limited to the above-described embodiment.

It is the schematic diagram seen from the front side part of the vehicle which assembled | attached the collision detection apparatus for vehicles of one Embodiment of this invention. (A) is principal part sectional drawing which looked at the vehicle collision detection apparatus 1 from the side, (b) is principal part sectional drawing which looked at the vehicle collision detection apparatus 1 which the pedestrian etc. collided with the vehicle bumper 2 from the side. It is. It is a perspective view of pressure-sensitive sensor 8 of an embodiment. It is a block diagram of pedestrian protection device ECU10 of an embodiment. It is a flowchart which shows the flow of the process which the pressure sensor 72 of embodiment detects. It is a flowchart which shows the flow of the process which the pressure sensor 8 of embodiment operates. (A) is principal part sectional drawing which looked at the vehicle collision detection apparatus 1 of the modification of embodiment from the side, (b) is the vehicle collision detection apparatus 1 which the pedestrian etc. collided with the vehicle bumper 2 from the side. It is the principal part sectional view seen.

Explanation of symbols

1: Vehicle collision detection device 2: Vehicle bumper 3: Bumper cover 4: Bumper reinforcement 4a: Bumper reinforcement front 5: Side member 6: Absorber 7: Detection unit 71: Chamber member 71a: Chamber space 71b: Accommodating Groove 72: Pressure sensor 8: Pressure sensor 81: Cross-section hollow insulator 82: Air gap 83: Electrode wire 10: Pedestrian protection device ECU 10a: Pressure sensor signal wire 10b: Pressure sensor signal wire 11: CPU 12: I / F 13: EEPROM 14: Display means 16: Pedestrian protection device

Claims (8)

A detection unit having a chamber member disposed in front of a bumper reinforcement in a vehicle bumper and having a chamber space formed therein, and a pressure sensor for detecting a pressure change in the chamber space, the pressure sensor In the vehicle collision detection device configured to detect a collision with the vehicle bumper based on a pressure detection result,
A collision sensor that is provided separately from the pressure sensor and outputs a signal when a predetermined collision occurs in the vehicle bumper;
A vehicle collision detection device comprising: failure determination means for determining failure of the detection unit based on a signal from the collision sensor.   The vehicle collision detection device according to claim 1, wherein the collision sensor is disposed over the entire vehicle width direction of the vehicle bumper.   The vehicle collision detection device according to claim 1, wherein the collision sensor is a pressure-sensitive sensor that outputs a signal when a pressing force is applied.   The vehicle collision detection device according to claim 3, wherein the collision sensor is disposed between the chamber member and the bumper reinforcement.   The vehicle collision detection device according to claim 3, wherein the collision sensor is disposed on the vehicle front side of the chamber member.   6. The vehicle collision detection device according to claim 4, wherein the chamber member has a receiving groove for arranging the collision sensor.   7. The pressure sensor according to claim 3, wherein the pressure sensor is a long pressure sensor that is substantially the same length as the chamber member and extends in the vehicle width direction. 8. Vehicle collision detection device. 8. The apparatus according to claim 1, further comprising notification means for notifying the failure of the detection unit when the failure determination means determines that the detection unit has failed. The vehicle collision detection device as described.

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