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本文从空间滤波及空-时转换的角度对一种无接触汽车速度计的工作原理进行了数学描述,给出了输出信号的频谱表达式,讨论了传感器参数与输出信号带宽的关系以及传感器和路面特性的匹配问题。
In this paper, the working principle of a contactless car speedometer is described mathematically from the perspective of spatial filtering and space-time conversion. The spectrum expression of the output signal is given. The relationship between the sensor parameters and the output signal bandwidth is discussed. Pavement characteristics of the matching problem.