Automobile body height detection device and method and automobile

Abstract

The invention discloses an automobile body height detection device and method and an automobile. The device comprises a sampling unit and a control unit. The sampling unit samples the time of each charging and discharging of an inductor in a height sensor of an automobile according to a set sampling period to obtain charging and discharging time, and takes the charging and discharging time as sample data; the control unit determines the maximum data length of a data set formed by the sampling data in the set sampling period and records the maximum data length as n, and determines an average value of first m pieces of sampling data in the data length, wherein n and m are both positive integers, and m is smaller than or equal to n; a difference value between the (m+1) th sampling data and the average value is taken as a change rate, and the effective data length of the data set formed by the sampling data is determined according to the change rate; and the automobile body height of the automobile is determined according to the data set of the sampling data corresponding to the effective data length. According to the scheme, the detection precision of an inductance type height sensoron automobile body height measurement is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a vehicle body height detection device, a method and a vehicle, in particular to an adaptive acquisition device, a method and a vehicle of an inductive height sensor. Background technique [0002] In related solutions, the height sensors used to measure the height of the vehicle body mainly include inductive, Hall voltage, and current height sensors. Since the wiring harness is too long, the signals of the voltage type and current type height sensors will be severely attenuated. Therefore, for commercial vehicles with a long body, most of them use inductive height sensors to measure the height of the vehicle body. [0003] However, for the inductive height sensor, the range is from a few mH to hundreds of mH, and the inductance change corresponding to the angle (height) is relatively small, and the sampling accuracy is required to reach 0.1mH (about 1‰~5‰). The r...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a vehicle body height detection device, method and automobile to solve the problem that the stability and real-time performance of the inductive height sensor for the measurement of the vehicle body height cannot be synchronized, which affects the inductive height sensor for the automobile. The problem of the detection accuracy of the vehicle body height measurement can achieve the effect of improving the detection accuracy of the inductive height sensor for the vehicle body height measurement

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