We propose a time-of-flight ranging method by measuring the pulse laser phase based on field-programmable gate array (FPGA) digital mixing, in which accurate laser ranging with a total digital system is realized by combining one FPGA chip with a simple laser transmitting and receiving circuit. The system has the advantage of simple structure, reliable operation, low manufacturing cost and easy integration. Experimental results show that compared with the pulse laser ranging method using commercial time-to-digital converter chips, it can realize precise measurement of distance, and the measurement error can be significantly reduced. In addition, this method has better performance of ranging accuracy.

我们提出了一种基于现场可编程门阵列（FPGA）数字混合测量脉冲激光相位的飞行时间测距方法，该方法通过将一个FPGA芯片与一个简单的激光相结合来实现整个数字系统的精确激光测距发送和接收电路。该系统结构简单，运行可靠，制造成本低，易于集成。实验结果表明，与使用商用时间数字转换器芯片的脉冲激光测距方法相比，它可以实现距离的精确测量，并且可以大大降低测量误差。另外，该方法具有更好的测距精度性能。