基于游标内插原理的多脉冲测距方法

Multi-period pulses ranging method based on vernier interpolation principle

将游标内插原理和多周期测量技术应用于脉冲测距方式,提出一种适用于近距离高精度电波或激光脉冲测距仪的方法,即在多周期脉冲工作方式下,利用2个时钟信号的微小周期差,将收发脉冲的时间间隔扩展放大以提高测量精度,有效测量范围由主时钟周期决定。设计了相应的时钟控制电路和时间间隔测量电路,并将该方法实际应用于近程网线电缆测距,达到了厘米量级的测量误差。

Utilizing time-interval measurement of vernier interpolation principle in the multi-period pulses ranging, this study proposed a method suitable for electric wave or laser distance measuring instruments of short distance and high precision. Based on the tiny difference between the periods of two clocks, the time interval between transmitter pulse and received pulse was expanded to improve the accuracy in the multi-period pulses mode. In addition, the effective range was decided by the period of the master clock. The clock control circuit and the time-interval measuring circuit were designed. The proposed method had been practically applied to the measurement of network cables, and the measuring error of centimetre-sized was approached.