Vehicle height sensor based on laser radar ranging in airbag

Abstract

The invention discloses a vehicle height sensor based on laser radar ranging in an airbag. The vehicle height sensor comprises a sensor body and a reflector; the sensor body is connected with an air intake passage of an ECAS system airbag, and the sensor body comprises a laser emitting probe and a laser receiving module; and the reflector is mounted on the inner bottom surface of the airbag and located directly under the laser emitting probe and the laser receiving module. The vehicle height sensor adopts a laser radar ranging principle to effectively measure the absolute height information ofthe airbag to characterize the height of a vehicle frame, the measuring process is performed in the inner space of the closed airbag, and the vehicle height sensor has the characteristics such as high measuring precision, long service life and good reliability; and meanwhile, the height sensor is simple in structure, the assembly process does not need a calibration link, and the vehicle height sensor is higher in assembly efficiency and easy maintenance.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to an automotive height sensor based on laser radar ranging in an airbag. Background technique [0002] In recent years, with the rapid development of the automotive electronics industry, the automotive electronic control system has become an indispensable part of the car. As the information source of the automotive electronic control system, the automotive sensor can measure the external physical quantities such as temperature, pressure, position, height, acceleration, etc. in real time and accurately. Its performance has become a key factor to measure the level of the automotive electronic control system. Compared with modern small passenger vehicles, commercial vehicles have larger loads and higher operating intensity, but the development level of their automotive electronic control systems is relatively backward. In particular, the development status of commercia...

AI Technical Summary

Problems solved by technology

Due to the harsh environment under the vehicle and the complex electromagnetic environment when the car is running, the service life, stability and reliability of the height sensor made by the above principles face certain challenges.

At present, in order to ensure sufficient relevant performance of the above-mentioned existing height sensors, the manufacturing process is relatively complicated and the cost is relatively high

In addition, its attached complex linkage mechanical mechanism has a loss ratio in the mechanical transmission process, which introduces additional measurement errors and restricts the measurement accuracy of the height sensor

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