Vehicle collision determination device, vehicle collision determination method, and vehicle collision determination program

Abstract

To provide a vehicle collision determination system, a vehicle collision determination method, and a vehicle collision determination program capable of discriminating a case where a vehicle incurs a light collision from a case where a vehicle is traveling on a bad road but no collision has occurred.SOLUTION: A vehicle collision determination system 10 determines that a collision has occurred in a case where a detection value of an acceleration sensor 14 mounted on a vehicle V is equal to or larger than a predetermined first threshold and falls below a predetermined second threshold and a wheel speed variation value obtained from a wheel speed sensor 18 mounted on a wheel 16 of the vehicle V falls below a predetermined third threshold, and determines that the vehicle V is traveling on a bad road but no collision has occurred in a case where the detection value of the acceleration sensor 14 is equal to or larger than the first threshold and falls below the second threshold and the wheel speed variation value is equal to or larger than the third threshold.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vehicle collision determination device, a vehicle collision determination method, and a vehicle collision determination program.

Background Art

[0002] The following Patent Document 1 discloses a deployment control device for an airbag device in a vehicle including a first acceleration sensor provided in the vehicle interior and a second acceleration sensor provided at the front of the vehicle. The control unit of the following Patent Document 1 is configured to determine whether a collision has occurred in the vehicle based on the detection value of the first acceleration sensor and the detection value of the second acceleration sensor.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when only one acceleration sensor is provided near the center in the vehicle width direction, if a minor collision occurs at the end in the vehicle width direction such as an offset collision, the output value of the acceleration sensor away from the collision position becomes small. For this reason, when a minor collision (hereinafter referred to as "light collision") occurs, when traveling on a rough road surface with unevenness or when riding up on a curb or the like (hereinafter referred to as "traveling on a bad road"), the same degree of acceleration is detected. Therefore, it is impossible to distinguish between the case where the vehicle has a light collision and the case where the vehicle is simply traveling on a bad road and no collision has occurred.

[0005] In consideration of the above facts, an object of the present invention is to obtain a vehicle collision determination device, a vehicle collision determination method, and a vehicle collision determination program that can discriminate between the case where a light collision has occurred in a vehicle and the case where the vehicle is traveling on a bad road and no collision has occurred.

Means for Solving the Problem

[0006] When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than a predetermined first threshold and less than a predetermined second threshold, and the wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheel of the vehicle is less than a predetermined third threshold, it is determined that a collision has occurred. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is traveling on a rough road and no collision has occurred.

[0007] According to the present invention described in claim 1, acceleration is detected by the acceleration sensor provided in the vehicle. Also, wheel speed is detected by the wheel speed sensor provided on the wheel of the vehicle. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is less than the third threshold, it is determined that a collision has occurred. On the other hand, when the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is traveling on a rough road and no collision has occurred.

[0008] Here, the first threshold is a threshold capable of detecting the acceleration at the time of a minor collision. Also, the second threshold cannot be detected when a minor collision occurs while traveling on a normal road with few or no unevennesses and when no collision occurs while traveling on a rough road, and can be detected when a normal collision occurs while traveling on a normal road and when a collision occurs while traveling on a rough road.

[0009] Furthermore, the third threshold cannot be detected when the vehicle is traveling on a normal road, and is a threshold capable of being detected when the vehicle is traveling on a rough road. Note that traveling on a rough road includes not only the case where the vehicle travels on a road surface with many unevennesses but also the case where the vehicle rides up on a curb or the like.

[0010] When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold and less than the second threshold, it includes both the case where a minor collision has occurred in the vehicle and the case where the vehicle is traveling on a rough road and no collision has occurred.

[0011] According to the present invention, by providing a third threshold value for the wheel speed fluctuation value, it is possible to distinguish between the case where a minor collision has occurred in the vehicle and the case where the vehicle is traveling on a rough road and no collision has occurred.

[0012] The vehicle collision determination device according to claim 2 determines that a collision has occurred and outputs collision information to the server in the case where the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value is less than the third threshold value, and in the case where the detected value of the acceleration sensor is equal to or greater than the second threshold value.

[0013] According to the present invention described in claim 2, it is determined that a collision has occurred and collision information is output to the server in the case where the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value is less than the third threshold value, and in the case where the detected value of the acceleration sensor is equal to or greater than the second threshold value.

[0014] Conventionally, when appraising a used car, if the accident history is overlooked and an accurate appraisal is not made, there is a risk of an inappropriate transaction for the user and a risk of a decline in the credibility of the seller. According to the present invention, by outputting collision information, it is possible to prevent overlooking the accident history by using the collision information during the used car appraisal.

[0015] The vehicle collision determination device according to claim 3, in the invention described in claim 2, when the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the vehicle wheel speed fluctuation value is less than the third threshold value, it is determined that a minor collision has occurred while the vehicle is traveling on a normal road, and collision information is output to the server. When the detected value of the acceleration sensor is equal to or greater than the second threshold value, it is determined that a normal collision has occurred while the vehicle is traveling on a normal road or a collision has occurred while the vehicle is traveling on a rough road, and collision information is output to the server. When the detected value of the acceleration sensor is less than the first threshold value, it is determined that the vehicle is traveling on a normal road and no collision has occurred, and driving information is output to the server. When the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the vehicle wheel speed fluctuation value is equal to or greater than the third threshold value, it is determined that the vehicle is traveling on a rough road and no collision has occurred, and driving information is output to the server.

[0016] According to the present invention described in claim 3, when the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the vehicle wheel speed fluctuation value is less than the third threshold value, it is determined that a minor collision has occurred while the vehicle is traveling on a normal road, and collision information is output to the server.

[0017] On the other hand, when the detected value of the acceleration sensor is equal to or greater than the second threshold value, it is determined that a normal collision has occurred or a minor collision has occurred while the vehicle is traveling on a rough road, and collision information is output to the server.

[0018] That is, it is possible to distinguish between the case where a minor collision occurs while the vehicle is traveling on a normal road and the case where a normal collision occurs while the vehicle is traveling on a normal road or a collision occurs while the vehicle is traveling on a rough road.

[0019] Further, when the detected value of the acceleration sensor is less than the first threshold value, it is determined that the vehicle is traveling on a normal road and no collision has occurred, and driving information is output to the server.

[0020] When the detected value of the acceleration sensor on one side is equal to or greater than the first threshold and less than the second threshold, and the vehicle wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is driving on a rough road and no collision has occurred, and the driving information is output to the server.

[0021] That is, even in a scenario where no collision has occurred, it is possible to distinguish between the case where the vehicle is driving on a normal road and the case where the vehicle is driving on a rough road. As a result, since the history of driving on a rough road can be known as the driving history, it is possible to estimate the wear condition of the parts that deteriorate during driving on a rough road.

[0022] In the vehicle collision determination method according to claim 4, when the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold and less than the second threshold, and the vehicle wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheels of the vehicle is less than the third threshold, it is determined that a collision has occurred. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the vehicle wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is driving on a rough road and no collision has occurred.

[0023] According to the present invention described in claim 4, acceleration is detected by the acceleration sensor provided in the vehicle. Also, wheel speed is detected by the wheel speed sensor provided on the wheels of the vehicle. And when the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the vehicle wheel speed fluctuation value is less than the third threshold, it is determined that a collision has occurred. On the other hand, when the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the vehicle wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is driving on a rough road and no collision has occurred.

[0024] When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold and less than the second threshold, it includes both the case where a minor collision has occurred to the vehicle and the case where the vehicle is driving on a rough road and no collision has occurred.

[0025] According to the present invention, by setting the third threshold for the vehicle wheel speed fluctuation value, it is possible to distinguish between the case where a minor collision has occurred to the vehicle and the case where the vehicle is driving on a rough road and no collision has occurred.

[0026] When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheel of the vehicle is less than the third threshold value, it is determined that a collision has occurred, and when the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value is equal to or greater than the third threshold value, the computer is caused to execute a process of determining that the vehicle is traveling on a rough road and no collision has occurred.

[0027] According to the present invention described in claim 5, acceleration is detected by the acceleration sensor provided in the vehicle. Further, wheel speed is detected by the wheel speed sensor provided on the wheel of the vehicle. Then, when the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value is less than the third threshold value, it is determined by the computer that a collision has occurred. On the other hand, when the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value and the wheel speed fluctuation value is equal to or greater than the third threshold value, it is determined by the computer that the vehicle is traveling on a rough road and no collision has occurred.

[0028] When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold value and less than the second threshold value, it includes both the case where a minor collision has occurred in the vehicle and the case where the vehicle is traveling on a rough road and no collision has occurred.

[0029] According to the present invention, by providing the third threshold value for the wheel speed fluctuation value, it is possible to distinguish between the case where a minor collision has occurred in the vehicle and the case where the vehicle is traveling on a rough road and no collision has occurred.

Effect of the Invention

[0030] As described above, the vehicle collision determination device according to the present invention described in claim 1 has an excellent effect that it can distinguish between the case where a minor collision has occurred in the vehicle and the case where the vehicle is traveling on a rough road and no collision has occurred.

[0031] The vehicle collision determination device according to the present invention described in claim 2 has an excellent effect of being able to prevent overlooking of the accident history by using collision information during the inspection of a used vehicle.

[0032] The vehicle collision determination device according to the present invention described in claim 3 has an excellent effect of being able to estimate the wear condition of parts that deteriorate during driving on rough roads.

[0033] The vehicle collision determination method according to the present invention described in claim 4 has an excellent effect of being able to distinguish between the case where a minor collision has occurred in the vehicle and the case where the vehicle is driving on a rough road and no collision has occurred.

[0034] The vehicle collision determination program according to the present invention described in claim 5 has an excellent effect of being able to distinguish between the case where a minor collision has occurred in the vehicle and the case where the vehicle is driving on a rough road and no collision has occurred.

Brief Description of Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0036] Hereinafter, the airbag ECU 10 as a vehicle collision determination device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. Note that the arrow FR shown in FIGS. 1 and 5 indicates the front side in the vehicle longitudinal direction, and the arrow RH indicates the right side in the vehicle width direction (left-right direction). Also, in the following description, when the directions of up and down, front and back, and left and right are used without special mention, they indicate up and down in the vehicle vertical direction, front and back in the vehicle longitudinal direction, and left and right when the vehicle is facing the traveling direction.

[0037] FIG. 1 shows together the hardware configuration of a vehicle V equipped with an airbag ECU (Electronic Control Unit) 10 as a vehicle collision determination device and the system configuration of an information management system S including the vehicle V and a server 50.

[0038] As shown in FIG. 1, the vehicle V is provided with a floor sensor 14 as an acceleration sensor for measuring floor acceleration at the center in the vehicle longitudinal direction and the center in the vehicle width direction of the floor of the vehicle body 12. In addition, wheel speed sensors 18 are provided on each of the four wheels 16 of the vehicle V. Further, the vehicle V is provided with a brake ECU 20 that acquires the wheel speed information of each wheel 16. Each wheel speed sensor 18 is electrically connected to the brake ECU. The solid line L in FIG. 1 represents a signal line.

[0039] In addition, the vehicle V is equipped with a DCM-ECU (Data Communication Module-Electronic Control Unit) 30 that transmits collision information and driving information, which will be described later, to the server 50. The server 50 has a function of recording the received collision information and driving information. The dotted line M in FIG. 1 represents a communication line. The DCM-ECU 30, the airbag ECU 10, and the brake ECU 20 are each connected to the bus 40. As a result, the airbag ECU 10 can acquire data related to the floor acceleration and the wheel speed, and transmit collision information and driving information as determination results, which will be described later, to the server 50 via the DCM-ECU 30. In addition, the airbag ECU 10 is electrically connected to an airbag device (not shown), and is configured to output a signal for deploying the airbag when it is determined that the vehicle V has collided. Note that the above configuration is an example and is not limited thereto. For example, one in-vehicle device as a vehicle collision determination device may perform all the roles of data acquisition, determination, and information transmission.

[0040] Although not shown in the figure, the airbag ECU 10 includes a ROM (Read-Only Memory) that stores a program, a RAM (Random Access Memory) that temporarily stores data during program execution, a CPU (Central Processing Unit) that executes the program, and input / output ports. The CPU, ROM, RAM, and input / output ports are communicably connected to each other via an internal bus.

[0041] FIG. 2 shows the floor acceleration detected by the floor sensor 14. In FIG. 2, the thick solid line N indicates the floor acceleration when a minor collision occurs while the vehicle V is traveling on a normal road, that is, a road with few or no irregularities. The thin solid line O indicates the floor acceleration when the vehicle V is traveling on a rough road and no collision has occurred. Further, the dashed-dotted line P indicates the floor acceleration when a minor collision occurs while the vehicle V is traveling on a rough road. Note that rough road driving includes not only the case where the vehicle V travels on a road surface with many irregularities but also the case where the vehicle V rides up on a curb or the like.

[0042] (Functional Configuration of Airbag ECU 10) The CPU of the airbag ECU 10 has a function of determining whether the detected value of the floor sensor 14 is equal to or greater than the threshold value A or less than the threshold value A. Further, the CPU of the airbag ECU 10 has a function of determining whether the detected value of the floor sensor 14 is equal to or greater than the threshold value B or less than the threshold value B.

[0043] Here, the threshold value A is a threshold value capable of detecting the floor acceleration at the time of a minor collision, and corresponds to the first threshold value in the present invention. On the other hand, the threshold value B cannot be detected when a minor collision occurs while the vehicle is traveling on a normal road and when no collision occurs while traveling on a rough road, and can be detected when a normal collision occurs while traveling on a normal road and when a collision occurs while traveling on a rough road, and corresponds to the second threshold value in the present invention.

[0044] FIG. 3 shows a wheel speed fluctuation value calculated based on the wheel speed detected by the wheel speed sensor 18. In FIG. 3, the thick line Q indicates the wheel speed fluctuation value when the vehicle V is traveling on a normal road, and the thin line R indicates the wheel speed fluctuation value when the vehicle V is traveling on a rough road.

[0045] The CPU of the airbag ECU 10 has a function of determining whether the wheel speed fluctuation value is equal to or greater than the threshold value C as the third threshold value or less than the threshold value C. The third threshold value is not detected when the vehicle V is traveling on a normal road, and is a threshold value that can be detected when the vehicle V is traveling on a rough road.

[0046] When the detected value of the floor sensor 14 is equal to or greater than the threshold value A and less than the threshold value B and the wheel speed fluctuation value is less than the threshold value C, the CPU of the airbag ECU 10 determines that a minor collision has occurred while the vehicle V is traveling on a normal road and outputs collision information to the server 50.

[0047] Further, when the detected value of the floor sensor 14 is equal to or greater than the threshold value B and the wheel speed fluctuation value is less than the threshold value C, the CPU of the airbag ECU 10 determines that a normal collision has occurred while the vehicle V is traveling on a normal road and outputs collision information to the server 50.

[0048] Furthermore, when the detection value of the floor sensor 14 is equal to or greater than the threshold value B and the vehicle speed fluctuation value is equal to or greater than the threshold value C, the CPU of the airbag ECU 10 determines that a collision has occurred while the vehicle V is traveling on a rough road, and outputs collision information to the server 50. Note that this collision includes both a normal collision and a minor collision.

[0049] Furthermore, when the detection value of the floor sensor 14 is less than the threshold value A, the CPU of the airbag ECU 10 determines that the vehicle V is traveling on a normal road and no collision has occurred, and outputs driving information to the server.

[0050] Also, when the detection value of the floor sensor 14 is equal to or greater than the threshold value A and less than the threshold value B and the vehicle speed fluctuation value is equal to or greater than the threshold value C, the CPU of the airbag ECU 10 determines that the vehicle V is traveling on a rough road and no collision has occurred, and outputs driving information to the server 50. Here, the driving information includes, as an example, the time when the vehicle speed was measured and the determination result as to whether the road traveled was a normal road or a rough road.

[0051] (Operation of this Embodiment) Next, the processing flow of the vehicle collision determination program executed by the airbag ECU 10 will be described using the flowchart shown in FIG. 4, and the operation of this embodiment will be described through this description.

[0052] In step S100, the CPU of the airbag ECU 10 acquires the acceleration data measured by the floor sensor 14.

[0053] In step S102, the CPU of the airbag ECU 10 determines whether the detected value of the acceleration is equal to or greater than the threshold value A.

[0054] In step S102, when it is determined that the detected value of the acceleration is less than the threshold value A, that is, the detected value of the acceleration is less than the threshold value A, in step S104, the CPU of the airbag ECU 10 determines that "the vehicle V is traveling on a normal road and no collision has occurred". Then, in step S106, driving information indicating that the vehicle V is traveling on a normal road is output to the server 50, and the process ends.

[0055] On the other hand, in step S102, when it is determined that the detected value of the acceleration is greater than or equal to the threshold value A, in step S108, the CPU of the airbag ECU 10 acquires the wheel speed data measured by each wheel speed sensor 18. Then, in step S110, it is determined whether the detected value of the acceleration is less than the threshold value B.

[0056] In step S110, when it is determined that the detected value of the acceleration is less than the threshold value B, in step S112, the CPU of the airbag ECU 10 determines whether the wheel speed variation value is greater than or equal to the threshold value C.

[0057] In step S112, when it is determined that the wheel speed variation value is greater than or equal to the threshold value C, in step S114, the CPU of the airbag ECU 10 determines that "the vehicle V is traveling on a rough road and no collision has occurred". Then, in step S106, driving information indicating that the vehicle V is traveling on a rough road is output to the server 50, and the process ends.

[0058] On the other hand, in step S112, when it is determined that the wheel speed variation value is less than the threshold value C, that is, the wheel speed variation value is less than the threshold value C, in step S116, the CPU of the airbag ECU 10 determines that "a minor collision has occurred while the vehicle V is traveling on a normal road". Then, in step S118, the collision information is output to the server 50, and the process ends.

[0059] Also, in step S110, when it is determined that the detected value of the acceleration is not less than the threshold value B, that is, the detected value of the acceleration is greater than or equal to the threshold value B, in step S120, the CPU of the airbag ECU 10 determines whether the wheel speed variation value is greater than or equal to the threshold value C.

[0060] In step S120, when it is determined that the wheel speed variation value is greater than or equal to the threshold value C, in step S122, the CPU of the airbag ECU 10 determines that "the vehicle V has collided while traveling on a rough road". Then, in step S118, the collision information is output to the server 50, and the process ends.

[0061] On the other hand, in step S120, when it is determined that the wheel speed variation value is not greater than or equal to the threshold value C, that is, the wheel speed variation value is less than the threshold value C, in step S124, the CPU of the airbag ECU 10 determines that "the vehicle V has had a normal collision while traveling on a normal road". Then, in step S118, the collision information is output to the server 50, and the process ends.

[0062] Subsequently, in order to describe in detail the operation of the airbag ECU 10 according to the present embodiment, with reference to FIGS. 5(A) and 5(B), a case where the vehicle V is provided with a pair of left and right front sensors 200 instead of the floor sensor 14 will be described.

[0063] In FIG. 5(A), a pair of left and right front sensors 200 are shown by dotted lines and are arranged at both ends in the vehicle width direction at the front end of the vehicle body 12.

[0064] The dotted line S in FIG. 5(B) shows the output value of the left front sensor 200 when an offset collision occurs at the left front fender 22 of the vehicle V as shown in FIG. 5(A). On the other hand, the thick solid line T in FIG. 5(B) shows the output value of the floor sensor 14 when an offset collision occurs at the left front end of the vehicle V as shown in FIG. 5(A). Also, the thin solid line U in FIG. 5(B) shows the output value of the floor sensor 14 when the vehicle V is traveling on a rough road and no collision has occurred.

[0065] As shown in FIG. 5(B), the output value T of the floor sensor 14 away from the collision position becomes smaller than the output value S of the front sensor 200 on the left side closer to the collision position. For this reason, when a minor collision such as an offset collision occurs, the output value T and the output value U when the vehicle V is traveling on a rough road become comparable, and it is impossible to accurately determine the presence or absence of a collision based on a predetermined threshold value. This is the same not only for the floor sensor 14 but also when a single front sensor (not shown) is provided at the center in the vehicle width direction. Conventionally, when assessing a used car, if the accident history is overlooked and an accurate assessment is not made, there is a risk of an inappropriate transaction for the user and a decline in the credibility of the dealer. For example, even if the frame of the vehicle body is slightly distorted due to a minor collision, if the distortion is such that it cannot be visually discriminated, there is a possibility that this distortion will be overlooked during the assessment. Also, even when a minor collision occurs that does not cause distortion in the frame of the vehicle body, there is a risk that this accident history will be overlooked, which is disadvantageous to the user.

[0066] According to the airbag ECU 10 according to the present embodiment, by using the wheel speed fluctuation value as a criterion for determination together with the acceleration, it is possible to distinguish between the case where "the vehicle V is traveling on a rough road and no collision has occurred" and the case where "a minor collision has occurred while the vehicle V is traveling on a normal road". Therefore, by referring to the collision information stored in the server 50 during the assessment of a used car, it is possible to prevent overlooking the accident history.

[0067] Furthermore, according to the airbag ECU 10 according to the present embodiment, apart from the above two cases, it is possible to distinguish between the case where "the vehicle V is traveling on a normal road and no collision has occurred" and the case where "the vehicle V is traveling on a rough road and no collision has occurred". That is, even in a situation where no collision has occurred, it is possible to distinguish between the case where the vehicle is traveling on a normal road and the case where the vehicle is traveling on a rough road. As a result, since the history of traveling on a rough road can be known as the driving history, by referring to the driving information stored in the server 50, it is possible to estimate the wear condition of the parts that deteriorate during rough road driving.

[0068] Furthermore, according to the airbag ECU 10 according to the present embodiment, it is possible to determine between the case where "the vehicle V has collided while traveling on a rough road" and the case where "the vehicle V has collided normally while traveling on a normal road". Therefore, it is possible to more accurately estimate the degree of wear of parts that deteriorate during rough road driving.

[0069] In addition, the airbag ECU 10 according to the present embodiment acquires acceleration data from one floor sensor 14 disposed at the center in the vehicle longitudinal direction and the center in the vehicle width direction. Therefore, the cost of the vehicle V can be reduced as compared with the case of acquiring acceleration data from a pair of left and right front sensors 200.

[0070] 〔Supplementary Explanation of the Above Embodiment〕 In the above embodiment, the airbag ECU 10 has been described as outputting collision information and driving information to the server 50 via the DCM-ECU 30, but it is not limited to this. For example, the collision information determined by the airbag ECU 10 may be used only for determining whether to deploy the airbag.

[0071] Also, in the above embodiment, the CPU of the airbag ECU 10 has been described as determining between the case where "the vehicle V has collided normally while traveling on a normal road" and the case where "the vehicle V has collided while traveling on a rough road" based on the threshold value C of the wheel speed fluctuation value when the detected value of the floor sensor 14 is equal to or greater than the threshold value B. However, it is not limited to this, and the airbag ECU 10 may output collision information to the server as if any collision has occurred without determining the above two cases.

[0072] Furthermore, in the above embodiment, the floor sensor 14 has been described as being used as the acceleration sensor, but it is not limited to this, and acceleration sensors disposed at other positions of the vehicle, such as front sensors, may be used.

Explanation of Reference Numerals

[0073] 10 Airbag ECU (Vehicle Collision Determination Device) 14 Floor Sensor (Acceleration Sensor) 16 Wheels 18 Wheel speed sensor 50 Server N Floor acceleration (detection value of acceleration sensor) when a minor collision occurs while vehicle V is traveling on a normal road O Floor acceleration (detection value of acceleration sensor) when vehicle V is traveling on a rough road and no collision has occurred P Floor acceleration (detection value of acceleration sensor) when a minor collision occurs while vehicle V is traveling on a rough road Q Wheel speed fluctuation value when vehicle V is traveling on a normal road (wheel speed fluctuation value) R Wheel speed fluctuation value when vehicle V is traveling on a rough road (wheel speed fluctuation value) V Vehicle

Claims

1. When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than a predetermined first threshold and less than a predetermined second threshold, and the wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheel of the vehicle is less than a predetermined third threshold, it is determined that a collision has occurred. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is traveling on a rough road and no collision has occurred. A vehicle collision determination device.

2. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is less than the third threshold; When the detected value of the acceleration sensor is equal to or greater than the second threshold; It is determined that a collision has occurred, and collision information is output to the server. The vehicle collision determination device according to Claim 1.

3. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is less than the third threshold, it is determined that a minor collision has occurred while the vehicle is traveling on a normal road, and collision information is output to the server. When the detected value of the acceleration sensor is equal to or greater than the second threshold, it is determined that a normal collision has occurred while the vehicle is traveling on a normal road or a collision has occurred while the vehicle is traveling on a rough road, and collision information is output to the server. When the detected value of the acceleration sensor is less than the first threshold, it is determined that the vehicle is traveling on a normal road and no collision has occurred, and driving information is output to the server. When the detected value of the acceleration sensor is equal to or greater than the first threshold and less than the second threshold, and the wheel speed fluctuation value is equal to or greater than the third threshold, it is determined that the vehicle is traveling on a rough road and no collision has occurred, and driving information is output to the server. The vehicle collision determination device according to Claim 2.

4. When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold value and less than the second threshold value, and the wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheel of the vehicle is less than the third threshold value, it is determined that a collision has occurred. When the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value, and the wheel speed fluctuation value is equal to or greater than the third threshold value, it is determined that the vehicle is traveling on a rough road and no collision has occurred. Vehicle collision determination method.

5. When the detected value of the acceleration sensor provided in the vehicle is equal to or greater than the first threshold value and less than the second threshold value, and the wheel speed fluctuation value obtained from the wheel speed sensor provided on the wheel of the vehicle is less than the third threshold value, it is determined that a collision has occurred. When the detected value of the acceleration sensor is equal to or greater than the first threshold value and less than the second threshold value, and the wheel speed fluctuation value is equal to or greater than the third threshold value, it is determined that the vehicle is traveling on a rough road and no collision has occurred. A vehicle collision determination program for causing a computer to execute the process.

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