Abstract:

A method of piezoelectric detection by tire print of the vehicle wheelbase difference was proposed based on the working behavior of the piezoelectric cable sensor. A detection device with dual trapezoidal bottom slot was designed and its tire print piezoelectric voltage signal waveform was analyzed. Mathematical models of the wheelbase difference detection under the conditions of the vehicle driving in straight line, in oblique line and in curved line were built based on the relative measurement theory, and the detection error compensation method was analyzed. The proposed method was investigated by test , the result showed that the onboard traverse position of the wheel can be measured precisely by the developed device, the compensation of the detection error caused by curved driving can be realized. The detection results proved the correctness of the built theoretical model. The wheelbase difference detection device is characterized by high accuracy, high reliability and low cost, with good prospects for practical application.

Key words: vehicle engineering, tire print, piezoelectric cables, wheelbase difference, error compensation