A vehicle speed signal measurement method of a vehicle speed sensor and its measurement and control system

Abstract

The invention relates to a vehicle speed signal measurement method of a vehicle speed sensor and a measurement and control system thereof. The measurement method is based on a dynamic frequency division method and adopts a measurement method based on a dynamic distribution measurement window based on a motor PWM control period and a vehicle speed signal period. The vehicle speed sensor measurement and control system includes a lower computer unit, an upper PC man-machine interface unit, a vehicle speed working condition simulation unit, a Hall type vehicle speed sensor and a vehicle speed instrument unit; the vehicle speed working condition simulation unit includes a vehicle speed motor; the lower computer unit includes a lower computer DSP system board, vehicle speed sensor conditioning circuit and vehicle speed motor drive circuit. The vehicle speed signal measuring method of the vehicle speed sensor of the present invention is not only simple and convenient to operate, but also has high measurement precision of the vehicle speed signal frequency, intuitive testing and accurate calibration. The vehicle speed sensor measurement and control system of the invention has simple and reasonable structural design, low cost, friendly man-machine interface and convenient practical application.

Description

technical field [0001] The invention relates to the technical field of vehicle speed sensors, in particular to a method for measuring vehicle speed signals of a vehicle speed sensor and a measurement and control system thereof. Background technique [0002] The sensor experiment benches currently on the market cannot meet the practical teaching requirements of automotive sensing technology. For this reason, we have been developing experiments with simple experimental equipment. For example, in the "Hall-type vehicle speed sensor" experiment, the sensor can only be simply fixed and connected to an external power supply, and the input shaft is manually rotated to observe the output pulse form to understand the characteristics of the sensor. It is impossible to understand and apply it in depth, and the test process is very inconvenient. It is not convenient for large-scale and repeated experiments; at the same time, the test and calibration of vehicle speed information are not...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems, the present invention proposes a simple, reasonable, easy-to-operate, man-machine interface in order to solve the existing problems of vehicle speed information-related testing and calibration that are not intuitive enough to test, not convenient and accurate enough to calibrate, and low in measurement accuracy. The vehicle speed signal measurement method and its measurement and control system of the vehicle speed sensor are friendly, low in cost, intuitive in test, accurate in calibration, high in measurement accuracy, and convenient for practical application

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