【摘要】 根据声的发射、反射及传输理论推出并用实验验证了测距回波包络曲线的近似方程，据此提出了一种高精度超声波测距信号处理方法．介绍了以单片机实现该方法的超声测距系统，该系统在２．５～１２ｍ范围内测距误差不大于０．２５％．更多还原

【Abstract】 Based on the theory of ultrasonic′s launching, reflecting and transmitting, an approximate equation descrbing the envelope of reflecting signal is derived and then verified experimentally.After that,a highaccuracy detection processing method is presented and a practical system realized with a 8051 single chip microcomputer is introduced.Distance measurement tests between 2.5 ～12 m show that its accuracy is satisfied.更多还原