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用数字方法实现连续波相位式激光测距时,参考信号和回波信号之间相位差的检测是信号处理部分的关键.本文从矢量内积的理论角度,提出了一种新的解决方案.运用矢量内积法直接对正弦数字信号序列进行处理,可以很方便地获得两正弦数字序列的相位差,从而在系统的软件及硬件设计等方面都得以简化。
When using digital method to realize continuous-wave phase laser ranging, the detection of the phase difference between the reference signal and the echo signal is the key of signal processing.In this paper, a new solution is proposed from the theoretical point of vector inner product. By using the vector inner product method to directly process the sinusoidal digital signal sequence, the phase difference between two sinusoidal digital sequences can be easily obtained, and thus the system software and hardware design can be simplified.