A vrucollision scenario test method for a vehicle event data recording system

Abstract

The application discloses a VRU collision working condition test method of an automobile event data recording system, and comprises the following steps: S1, adjusting a to-be-tested vehicle to a preset working state, so that the vehicle is located in an environment with a preset temperature; S2, installing an impact module on a launching system, and launching the impact module at a preset impact speed to a preset impact position of the vehicle through the launching system; the preset impact speed is equal to a VRU event trigger minimum speed value set by an automobile event data recording system (EDR); S3, collecting a real-time impact speed of the impact module and the vehicle during the impact of the impact module and the vehicle, and reading record data on the EDR when the reading is equal to the preset impact speed and an actual impact position of the vehicle is the preset impact position on the vehicle. The application can uniformly test VRU collision working conditions of various automobile models with EDRs, and more comprehensively and reliably masters technical performances of the automobiles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile event data recording system testing, in particular to a VRU collision working condition test method for an automobile event data recording system. BACKGROUND

[0002] With the continuous development of the automobile industry, the application of automobile event data recording systems on vehicles is becoming more and more common, and the national standard document GB 39732-2020 "Automobile Event Data Recording System" has been implemented. The detection of automobile event data recording systems (EDR) is becoming more and more important.

[0003] The automobile event data recording system (EDR) is composed of one or more vehicle-mounted electronic modules, and is a system with the function of monitoring, collecting and recording the data of the vehicle and occupant protection system before, during and after the collision event.

[0004] The currently published national standard document GB 39732-2020 "Automobile Event Data Recording System" has test requirements and test methods for longitudinal collision and lateral collision trigger thresholds, which correspond to the front collision working condition and the side collision working condition of the automobile whole vehicle respectively, but there is no requirement for the vulnerable road user (VRU) collision working condition of the automobile whole vehicle.

[0005] Since the VRU collision working condition is a complex event, there is no unified VRU collision working condition test method for the vehicle models with automobile event data recording systems (EDR).

[0006] Therefore, it is urgent to develop a technology that can uniformly test the VRU collision working condition of various automobile models with automobile event data recording systems (EDR), so as to more comprehensively and reliably master the technical performance of automobiles. SUMMARY

[0007] The purpose of the present application is to provide a VRU collision working condition test method for an automobile event data recording system in view of the technical defects of the prior art.

[0008] To this end, the present application provides a VRU collision working condition test method for an automobile event data recording system, which comprises the following steps:

[0009] Step S1, adjust the vehicle to be tested to a preset working state, and place the vehicle in an environment with a preset temperature;

[0010] Step S2, install the impact module on the launching system in advance, and launch the impact module at a preset impact speed by the launching system and aim at the preset impact position on the vehicle;

[0011] a preset impact speed, equal to a VRU event trigger minimum speed value set by an event data recorder (EDR) installed on the vehicle;

[0012] S3, collecting a real-time impact speed of the impact module and the vehicle during the impact of the impact module and the vehicle;

[0013] when the real-time impact speed is equal to the preset impact speed and the actual impact position of the vehicle is the preset impact position on the vehicle, reading recorded data on the event data recorder (EDR);

[0014] wherein the recorded data on the event data recorder (EDR) has different data ranges according to whether the impact module can trigger the event data recorder (EDR) to work.

[0015] As can be seen from the technical solutions provided by the present application, compared with the prior art, the present application provides a VRU collision working condition test method for an event data recorder (EDR), which is scientifically designed and can perform unified VRU collision working condition tests on various vehicle models with an event data recorder (EDR), so as to more comprehensively and reliably master the technical performance of the vehicle, and has great practical significance.

[0016] By applying the present application, the vacancy in the field of VRU collision working condition test technology can be filled. DETAILED DESCRIPTION

[0017] Figure 1 A basic flowchart of a VRU collision working condition test method for an event data recorder (EDR) provided by the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0019] In the description of the present patent, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting”, “setting” should be understood broadly, for example, can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those of ordinary skill in the art, the specific meanings of the above terms in the present patent can be understood according to the specific circumstances.

[0020] In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0021] Referring to Figure 1 The present application provides a VRU collision working condition test method of an automobile event data recording system, comprising the following steps:

[0022] Step S1, adjust the vehicle to be tested to a preset working state, and make the vehicle in an environment with a preset temperature;

[0023] Step S2, install the impact module on the launching system in advance, and launch the impact module at a preset impact speed through the launching system and aim at the preset impact position on the vehicle;

[0024] The preset impact speed is equal to the VRU event trigger minimum speed value set by the automobile event data recording system (EDR) installed on the vehicle (specifically the EDR controller in the system);

[0025] Step S3, collect the real-time impact speed of the impact module and the vehicle during the impact of the impact module and the vehicle;

[0026] When the real-time impact speed is equal to the preset impact speed, and the actual impact position of the vehicle is the preset impact position on the vehicle, read the recorded data on the automobile event data recording system (EDR).

[0027] Among them, according to whether the impact module can trigger the automobile event data recording system (EDR) to work, the recorded data on the automobile event data recording system (EDR) has different data ranges.

[0028] In the present application, in step S3, if the impact module belongs to the module type that can trigger the automobile event data recording system (EDR) to work (for example, PDI2 leg type impact module), and the real-time impact speed of the impact module and the vehicle is greater than or equal to the VRU event trigger minimum speed value set by the automobile event data recording system (EDR) installed on the vehicle, the impact module can trigger the automobile event data recording system (EDR) to work, the automobile event data recording system (EDR) is automatically triggered and automatically records the data of the vehicle, at this time the data range recorded on the automobile event data recording system (EDR) includes: the vehicle speed analog signal on the vehicle bus, and the preset data on the vehicle (not limited to the real-time vehicle speed of the vehicle, that is, not limited to the real-time impact speed of the impact module and the vehicle, see the specific description below);

[0029] If the impact module does not belong to the module type capable of triggering the automobile event data recording system (EDR) to work (for example, a small animal impact module), the impact module cannot trigger the automobile event data recording system (EDR) to work, the automobile event data recording system (EDR) is not automatically triggered, and at this time the data range recorded by the automobile event data recording system (EDR) only includes: the vehicle speed analog signal on the vehicle bus (the original data at the beginning of the test).

[0030] In the present application, it should be noted that in step S3, as for the preset data recorded by the automobile event data recording system (EDR) installed on the vehicle after being automatically triggered, according to the “Automobile Event Data Recording System” (GB 39732-2020), the data items recorded by the automobile event data recording system (EDR) installed on the vehicle after being triggered are divided into two categories, A and B, with 17 and 43 data items respectively. The A category data includes: vehicle identification code, speed, engine speed, brake state, accelerator pedal opening, safety belt usage state, collision speed change, etc.; the B category data mainly includes: collision acceleration, brake pedal opening, steering wheel angle, turn signal opening state, airbag / curtain deployment, active safety system such as ABS / ESC / TCS / AEB / ACC, etc.

[0031] In the present application, it should be noted that for a vehicle with an automobile event data recording system (EDR), a vehicle bus speed analog signal is sent to the automobile event data recording system (EDR) controller through a simulation test box.

[0032] It should also be noted that the simulation test box is a mature bench test supporting equipment in the prior art. According to the content of section “5.3.1.1” of the national standard document GB 39732-2020 “Automobile Event Data Recording System”, the simulation test box is a test box provided by the manufacturer to connect with the EDR controller, which is used to simulate the peripheral signals and loads of the EDR controller under the real vehicle state. The simulation test box has the functions of bus signal simulation, simulating the real vehicle signal to send to the EDR controller, and has the necessary peripheral sensors, loads and hard-wired components and other accessories connected with the EDR controller, to ensure that the EDR controller can work normally.

[0033] In the present application, it is necessary to point out that the EDR controller is a recorder, which has a similar function to the "black box" of an aircraft. The EDR controller is a mature and well-known device installed on a vehicle. According to the provisions of the national standard document GB39732-2020 "Automobile Event Data Recording System", the EDR controller is a vehicle-mounted electronic module for monitoring, collecting and recording time series data during the occurrence of a collision event, which is used for accident reconstruction. Any module that can achieve this function can be used as an EDR controller.

[0034] In the present application, in steps S2 and S3, the impact module is a mature impact module (i.e., an impactor) of existing technology, such as a PDI2 leg-type impact module for testing, a small animal impact module, and other common test impact modules.

[0035] In the present application, in step S3, the module type that can trigger the automobile event data recording system (EDR) to work has a weight that can trigger the automobile event data recording system (EDR) to work, i.e., it meets the weight condition specified by the system to be triggered. For example, it is a PDI2 leg-type impact module, which represents a pedestrian leg type. In addition, it can also be an aPLI leg-type impact module or a FlEX PLI leg-type impact module, and other impact modules of other pedestrian leg types.

[0036] The module type that cannot trigger the automobile event data recording system (EDR) to work is a module that does not have a weight that can trigger the automobile event data recording system (EDR) to work, i.e., it does not meet the weight condition specified by the system to be triggered. For example, it is a small animal impact module, which represents a duck, a cat, and other small animals.

[0037] Specifically, the weight of the PDI2 leg-type impact module is significantly greater than the weight of the small animal impact module. For example, the weight of the PDI2 leg-type impact module is 6.8 kg, and the weight of the small animal impact module is 1.9 kg.

[0038] It should be noted that for the existing automobile event data recording system (EDR), when the impact module is a PDI2 leg-type impact module, if the real-time impact speed of the impact module and the vehicle is greater than or equal to (i.e., reaches) the VRU event trigger minimum speed value set by the automobile event data recording system (EDR) installed on the vehicle (specifically, the EDR controller in the system), the EDR system is automatically triggered and automatically records the preset data on the vehicle.

[0039] For the small animal impact module, even if the real-time impact speed of the impact module with the vehicle is greater than or equal to (i.e., reaches) the VRU event trigger minimum speed value set by the vehicle-mounted event data recording system (EDR) (specifically, the EDR controller in the system), the EDR system will not be triggered to work, and thus will not trigger the recording data. At this time, the data recorded on the EDR system in step S3 is the original data recorded before the test, which only includes the vehicle speed simulation signal on the vehicle bus.

[0040] In the present application, the PDI2 leg-shaped impact module and the small animal impact module respectively play the role of triggering or not triggering the vehicle event data recording system (EDR) when impacting the vehicle, and can be used in normal temperature, high temperature and low temperature test scenes to meet the test requirements of different speeds and temperatures.

[0041] It should be noted that the PDI2 leg-shaped impact module meets the weight condition specified by the vehicle event data recording system EDR for triggering, so if the real-time impact speed of the PDI2 leg-shaped impact module with the vehicle is greater than or equal to (i.e., reaches) the VRU event trigger minimum speed value set by the vehicle-mounted event data recording system EDR (specifically, the EDR controller in the system), the EDR system is automatically triggered and automatically records the preset data on the vehicle (such as including the vehicle speed at the time, the throttle state, the state of the steering wheel, etc.); That is, the PDI2 leg-shaped impact module is a module that can be detected (i.e., trigger the EDR system) and recorded by the EDR system.

[0042] The small animal impact module, due to its light weight, does not meet the weight condition specified by the vehicle event data recording system EDR for triggering, so even if the real-time impact speed of the impact module with the vehicle is greater than or equal to (i.e., reaches) the VRU event trigger minimum speed value set by the vehicle-mounted event data recording system EDR (specifically, the EDR controller in the system), the EDR system will not be triggered to work, and thus will not trigger the recording data. That is, the small animal impact module is a module that cannot be detected (i.e., does not trigger the EDR system) and recorded by the EDR system.

[0043] In steps S2 and S3, it should be noted that the VRU event trigger minimum speed value set by the vehicle-mounted event data recording system (EDR) (specifically, the EDR controller in the system) is a value that is set in advance (i.e., has in advance) and provided by the production enterprise of the vehicle to be tested.

[0044] In this invention, in step S1, the preset working state includes the vehicle being in normal driving state, preset vehicle curb weight, preset vehicle speed, preset driving position of the vehicle's front wheels, preset vehicle operation settings, preset vehicle driving height, a preset weight block placed on the vehicle's driver's seat, and preset vehicle tire pressure, and is not limited to these vehicle state requirements.

[0045] In practice, the vehicle's front wheels are preset to a driving position, preferably: the vehicle's front wheels are in a straight-line driving position.

[0046] In practice, the vehicle's driver's seat is equipped with a pre-set weight block, which includes placing a pre-set weight block (e.g., 75kg) on ​​both the driver's seat and the passenger seat.

[0047] In practice, the preset vehicle tire pressure is preferably the tire pressure of each tire of the vehicle, which is equal to the tire pressure value specified by the vehicle manufacturer when the vehicle is half-loaded.

[0048] In terms of specific implementation, the pre-required vehicle operation settings include the vehicle being in the power-on ignition state, the vehicle being in P or N gear, the steering wheel angle being fixed at a preset angle, the seat belt buckle being locked, the turn signal being on, and the brake pedal and accelerator pedal having preset travel.

[0049] It should be noted that, for this invention, before testing, the vehicle must be pre-configured for driver and passenger operation. The vehicle should be powered on, in P or N gear, with the steering wheel angle fixed at a certain angle to avoid being in a free travel position, the seat belt buckle locked, the turn signals on, and the brake and accelerator pedals maintaining a certain travel to avoid being in a free travel position. The vehicle speed simulation information on the vehicle bus needs to simulate a vehicle speed at the minimum speed value for VRU event triggering set by the vehicle event data recording system (EDR) installed on the vehicle (specifically, the EDR controller in the system) (this speed value can be expressed as A km / h).

[0050] In addition, the preset operating state of the vehicle in step S1 may also include the following requirements:

[0051] 1. Fuel has been added to the fuel tank to its rated capacity (or the same mass of water or other counterweights);

[0052] 2. Other fluids in the vehicle (such as engine oil, brake fluid, washer fluid, antifreeze, etc.) have reached their maximum levels and have been adjusted.

[0053] 3. The spare tire and vehicle tools are in their respective locations on the vehicle. Any items unrelated to the vehicle have been removed from the vehicle.

[0054] 4. The front license plate and license plate mounting bracket of the vehicle should be in the same state as the actual normal driving state (except for the license plate) or as close as possible;

[0055] 5. The total mass of the vehicle and the axle load of the front and rear axles have been measured and recorded in advance, and the measured total mass of the vehicle is the curb weight of the vehicle;

[0056] 6. If the front seats of the vehicle are adjustable in front and rear position, they should be adjusted to the middle position of the adjustable stroke. If there is no locking position in the middle position of the seat, it should be adjusted to the first lockable position after the middle position;

[0057] 7. If the suspension is adjustable, the suspension should be adjusted to the actual height of the vehicle preset speed in the VRU collision working condition to be tested, for example, the suspension should be adjusted to the posture of the vehicle driving at a speed of 40km / h.

[0058] In the present application, in step S1, the vehicle is pre-set in the environmental warehouse, and the vehicle is located in an environment with a preset temperature by the environmental warehouse, so as to simulate the real external environment temperature.

[0059] Specifically, since the VRU collision test needs to be tested at different temperatures, in the present application, the recommended environmental temperature for high-temperature test is 40℃, the recommended environmental temperature for normal-temperature test is 23℃, and the recommended environmental temperature for low-temperature test is -20℃, and the time of the whole vehicle at the test temperature should be not less than 30min.

[0060] It should be noted that the environmental warehouse is used to simulate the environment, so as to perform environment-related tests on the vehicle, such as high and low temperature calibration, heat preservation, defrosting, defogging, etc.

[0061] In the present application, in step S2, the launch system is a mature test supporting system in the prior art, which can be used to install a dog impactor and launch at the required impact speed; the required impact speed is, for example, the VRU event trigger minimum speed value set by the automotive event data recording system (EDR) (specifically, the EDR controller in the system).

[0062] It should be noted that the launch system, as a mature known setting in the prior art, is applied to the automobile pedestrian protection collision test system, and is used to install the impact module (such as a PDI2 leg type impact module or a small animal impact module) to be launched on the launch system, and launch the impact module by using the air pressure device or electromagnetic device in the launch system, so as to achieve the impact on the bumper of the vehicle.

[0063] In the present application, when the vehicle is transversely distributed with the tail on the left and the head on the right in step S2, the preset impact position on the vehicle specifically includes at least one of the longitudinal plane of each VRU-related sensor mounting position on the vehicle, the longitudinal plane of the middle position of any two adjacent VRU-related sensors, the longitudinal plane of the middle position of the vehicle, and the longitudinal plane of the position extending to the left and right sides of the vehicle center every interval of a preset length (for example, 100 mm).

[0064] It should be noted that the VRU-related sensor on the vehicle specifically includes an acceleration sensor and a pressure tube sensor, wherein the acceleration sensor is used to collect the acceleration of the impact module such as the small animal impact module or the PDI2 impact module when the impact module hits the bumper of the vehicle, and then sends it to the vehicle-mounted automobile event data recording system EDR (specifically, the EDR controller in the system); the pressure tube sensor is used to collect the air pressure signal generated when the bumper of the vehicle is hit by the impact module, and convert the air pressure signal into a voltage signal, and then send it to the vehicle-mounted automobile event data recording system EDR (specifically, the EDR controller in the system).

[0065] Specifically, the VRU-related sensor on the vehicle is arranged in the front bumper of the vehicle.

[0066] In summary, compared with the prior art, the present application provides a VRU collision working condition test method for an automobile event data recording system, which is scientifically designed and can uniformly test the VRU collision working condition of various automobile models with an automobile event data recording system (EDR), so as to more comprehensively and reliably master the technical performance of the automobile, which has great practical significance.

[0067] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A VRU collision condition test method for an automotive event data recording system, characterized in that, Includes the following steps: Step S1: Adjust the vehicle to be tested to the preset working state and place the vehicle in an environment with a preset temperature. Step S2: The impact module is pre-installed on the launching system, and the impact module is launched at a preset impact speed and aimed at a preset impact position on the vehicle through the launching system. The preset impact speed is equal to the minimum speed value for VRU event triggering set by the vehicle event data recording system (EDR) installed on the vehicle. Step S3: During the collision between the impact module and the vehicle, the real-time impact speed between the impact module and the vehicle is collected. When the real-time impact speed is equal to the preset impact speed and the actual impact position of the vehicle is the preset impact position on the vehicle, read the recorded data on the vehicle event data recording system EDR; Among them, depending on whether the impact module can trigger the EDR (Electronic Event Data Recording) system to work, the recorded data on the EDR system have different data ranges. In step S3, if the impact module is a module type that can trigger the operation of the vehicle event data recording system (EDR), and the real-time impact speed between the impact module and the vehicle is greater than or equal to the minimum VRU event trigger speed value set by the vehicle event data recording system (EDR) installed on the vehicle, then the impact module can trigger the operation of the vehicle event data recording system (EDR). At this time, the data range recorded on the vehicle event data recording system (EDR) includes: the vehicle speed analog signal on the vehicle bus, and the preset data on the vehicle. If the impact module is not a module type that can trigger the EDR (Electronic Event Data Recording) system, then the impact module cannot trigger the EDR system. In this case, the data range recorded by the EDR system only includes: the vehicle speed analog signal on the vehicle bus. In step S3, the module type that can trigger the operation of the vehicle event data recording system EDR has the weight to trigger the operation of the vehicle event data recording system EDR, that is, it meets the weight conditions for being triggered as specified by the system. The module type that cannot trigger the Automotive Event Data Recording (EDR) system is a module that does not have the weight to trigger the EDR system and does not meet the weight conditions specified by the system for being triggered. In step S2, when vehicles are laterally distributed with their rear on the left and their front on the right, the preset impact positions on the vehicles specifically include: The longitudinal plane of each VRU-related sensor installation location on the vehicle, the longitudinal plane of the middle position of any two adjacent VRU-related sensors, the longitudinal plane of the middle position of the vehicle in the lateral direction, and the longitudinal plane of the vehicle center extending to the left and right sides at predetermined intervals based on the center of the vehicle. The VRU-related sensors on the vehicle are located inside the front bumper. The VRU-related sensors on the vehicle specifically include acceleration sensors and pressure tube sensors.

2. The VRU collision condition test method for the vehicle event data recording system as described in claim 1, characterized in that, In step S3, the module type that can trigger the EDR (Electronic Event Data Recording) system is the PDI2 leg impact module. The module type that cannot trigger the Automotive Event Data Recording (EDR) system is the small animal impact module.

3. The VRU collision condition test method for the vehicle event data recording system as described in claim 1, characterized in that, In step S1, the preset working states include the vehicle being in normal driving state, preset vehicle curb weight, preset vehicle speed, preset driving position of the vehicle's front wheels, preset vehicle operation settings, preset vehicle driving height, a preset weight block placed on the vehicle's driver's seat, and preset vehicle tire pressure.

4. The VRU collision condition test method for the vehicle event data recording system as described in claim 3, characterized in that, The vehicle's front wheels are pre-set to be in a straight-line driving position; The vehicle's driver's seat is equipped with a pre-set weight, specifically including a pre-set weight placed on both the driver's seat and the passenger seat. The preset tire pressure is equal to the tire pressure value specified by the vehicle manufacturer when the vehicle is half-loaded.

5. The VRU collision condition test method for the vehicle event data recording system as described in claim 3, characterized in that, The pre-required vehicle operation settings include the vehicle being powered on and ignited, the vehicle being in P or N gear, the steering wheel angle being fixed at a preset angle, the seat belt buckle being locked, the turn signals being on, and the brake and accelerator pedals having preset travel distances.

6. The VRU collision condition test method for the vehicle event data recording system as described in claim 1, characterized in that, In step S1, the vehicle is pre-positioned in an environmental chamber, which places the vehicle in an environment with a preset temperature.

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