ARM嵌入式支持下高精度脉冲激光测距研究

Research on High-Precision Pulsed Laser Ranging with ARM Embedded Support

采用目前方法进行脉冲激光测距时,无法消除正弦函数产生的时间累积误差,存在重构精度低和测距误差大的问题。提出ARM嵌入式支持下高精度脉冲激光测距研究方法,该方法在脉冲激光测距中引入ARM嵌入式高速核处理器,进行多帧相关检测、自适应门限检测和滤波降噪,并通过多点平均法消除脉冲激光测距过程中存在的时间累积误差,在此基础上通过差频测相方式提高脉冲激光测距的精度。实验结果表明,所提方法的重构精度高、测距误差小。

When the current method is used for pulsed laser ranging, the cumulative time error generated by the sine function cannot be eliminated, and there are problems of low reconstruction accuracy and large ranging error. A high-precision pulsed laser ranging research method supported by ARM embedded is proposed. This method introduces the ARM embedded high-speed core processor in the pulsed laser ranging to perform multi-frame correlation detection, adaptive threshold detection, and filter noise reduction. The point averaging method eliminates the accumulated time error in the pulse laser ranging process, and on this basis, the pulse laser ranging accuracy is improved by the difference frequency phase measurement method. Experimental results show that the proposed method has high reconstruction accuracy and small ranging error.