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CN-122009079-A - Collision detection device and vehicle

CN122009079ACN 122009079 ACN122009079 ACN 122009079ACN-122009079-A

Abstract

The present disclosure provides a collision detection device and a vehicle that are capable of efficiently and accurately detecting an a-pillar collision without being affected by environmental factors. The collision detection device comprises at least one strain gauge, at least one strain gauge is arranged on an A column of the vehicle, senses mechanical strain generated by collision of the A column, and outputs a corresponding resistance change signal. Through directly arranging the strain gauge in vehicle A post, can directly and acquire the mechanical strain that A post body produced in the collision in real time, not only simple structure, low cost, its testing process is not influenced by the environment moreover, can effectively overcome traditional front portion sensor and carry out quick, accurate discernment to the collision of A post region again in the detection blind area problem of special collision scene such as passenger car rear-end collision truck, has promoted the security performance of vehicle.

Inventors

  • MIAO QINGLIN

Assignees

  • 梅赛德斯-奔驰集团股份公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. A collision detection apparatus for a vehicle, characterized by comprising: at least one strain gauge is arranged on an A column of the vehicle, senses mechanical strain generated by collision of the A column and outputs a corresponding resistance change signal.
  2. 2. The collision detecting device according to claim 1, wherein, The A column comprises an inner plate and an outer plate positioned on the outer side of the inner plate, and the strain gauge is attached to the surface of the inner plate facing to one side of the vehicle interior space.
  3. 3. The collision detecting device according to claim 1 or 2, wherein, Each strain gauge is arranged along the extending direction of the A column.
  4. 4. A collision detecting device according to any one of claims 1 to 3, wherein, For each of the a-pillars, the strain gauge is configured in a plurality, spaced apart along an axial direction of the a-pillar to form a strain monitoring array.
  5. 5. A collision detecting device according to any one of claims 1 to 3, wherein, For each of the a-pillars, the strain gauge is configured to be 1, extending over substantially the entire length of the a-pillar in the axial direction.
  6. 6. The collision detection apparatus according to any one of claims 1 to 5, further comprising: A signal conditioning circuit electrically connected to the strain gauge for converting the resistance change signal into a voltage signal, and And the controller is electrically connected with the signal conditioning circuit and is configured to execute preset collision judging logic so as to judge whether collision occurs according to the amplitude and the duration of the voltage signal.
  7. 7. The collision detecting device according to any one of claims 1 to 6, wherein, The controller is configured to determine that the collision occurs when the magnitude of the voltage signal exceeds a preset first threshold and the rate of change of the voltage signal over time exceeds a preset second threshold.
  8. 8. The collision detecting device according to any one of claims 1 to 7, wherein, The controller is configured to be electrically connected to an airbag control system of a vehicle and to transmit a trigger signal to the airbag control system when it is determined that the collision occurs.
  9. 9. The collision detecting device according to any one of claims 1 to 8, wherein, The strain gauge is also arranged on a B column and/or a C column of the vehicle.
  10. 10. A vehicle comprising the collision detecting apparatus according to any one of claims 1 to 9.

Description

Collision detection device and vehicle Technical Field The disclosure relates to a collision detection device and a vehicle, and belongs to the technical field of vehicles. Background Currently, passive safety systems for passenger vehicles rely primarily on crash sensors (e.g., acceleration sensors, pressure sensors, etc.) mounted on the front, sides, and rear of the vehicle to sense crash events. The front inflation sensor or acceleration sensor is generally effective to sense a deceleration signal when the vehicle is involved in a frontal collision, thereby triggering an occupant restraint system such as an airbag. However, in accident scenarios such as a rear-end passenger truck, the cargo box may directly strike the a-pillar area of the passenger car as the truck cargo box floor height is typically comparable to the passenger car a-pillar position. Such collisions tend to avoid conventional sensors mounted on the vehicle front cross beam or tank frame, resulting in delayed or even completely unrecognizable sensor response, severely impacting the timeliness and accuracy of occupant protection system triggering. In order to solve the problem that the A-pillar collision is difficult to identify, in the prior art, an environment sensing sensor such as a radar, a visual camera and the like is tried to be introduced, and the collision risk is predicted by monitoring the type, the distance and the relative speed of an obstacle in front of a vehicle. However, such schemes are not only costly, but also the detection accuracy is greatly reduced or even disabled under severe weather and illumination conditions such as rain, snow, fog, strong light or night, and the accurate recognition of such collision scenes cannot be ensured. Therefore, a collision detection device which can effectively detect the collision of the A column, is not influenced by environmental factors and has high detection precision is needed to make up for the defects of the prior art and promote the safety protection capability of the passenger car under a special collision scene. Disclosure of Invention In order to solve the technical problem in the prior art, the present disclosure provides a collision detection device and a vehicle that can efficiently and accurately detect an a-pillar collision without being affected by environmental factors. The first aspect of the present disclosure provides a collision detection device for a vehicle, including at least one strain gauge, at least one strain gauge being disposed on an A-pillar of the vehicle, sensing a mechanical strain of the A-pillar due to a collision, and outputting a corresponding resistance change signal. According to the collision detection device with the configuration, the strain gauge is directly arranged on the A column of the vehicle, so that the mechanical strain generated by the A column body at the moment of collision can be directly and timely obtained, the structure is simple, the cost is low, the detection process is not affected by the environment, the problem of detection blind areas of the traditional front sensor in special collision scenes such as rear-end collision trucks of passenger vehicles can be effectively solved, the quick and accurate identification of the collision of the A column area can be realized, and the safety performance of the vehicle is improved. Preferably, in the collision detection device of the first aspect, the a pillar includes an inner panel and an outer panel located outside the inner panel, and the strain gauge is attached to a surface of the inner panel on a side facing the in-vehicle space. According to the collision detection device with the configuration, the strain gauge is attached to one side of the inner plate of the A column facing the space in the vehicle, mechanical strain signals transmitted from the outer plate to the inner plate can be accurately and directly captured when collision occurs, sensitivity and authenticity of collision detection are guaranteed, the strain gauge is placed in the vehicle, influence of the outside of the vehicle is avoided, complex additional protection is not needed, working stability and service life are improved, and finally, the installation mode can fully utilize the hidden space between the inner side of the A column and the inner decorative plate, original appearance of the vehicle body is not needed to be changed, and the installation process is simple, low in cost and excellent in feasibility. Preferably, in the collision detecting device of the first aspect, each of the strain gages is provided along an extending direction of the a-pillar. According to the collision detection device with the configuration, the sensitive axial direction of the strain gauge can be matched with the main stress direction of the A column under the front collision or rear collision working condition, so that the mechanical strain generated by the A column structure is captured maximally, and the sensitivity o