基于四象限APD 的相位法测距系统实现跟踪可行性分析

现有的相位法测距系统均是用来测量距离的,并没有提供方位角和俯仰角相关信息以实现对目标的自动跟踪,从而使得相位法的应用受到限制。针对上述现象,在不考虑回波光斑非均匀性和噪声的条件下,提出了基于接收器为四象限APD的相位法激光测距系统实现跟踪的想法,并通过理论分析和仿真实验证明,通过对四象限的四路信号进行FFT提取幅值信息,可以计算得到方位角和俯仰角,从理论上使得相位法测距系统可以在不需要其他设备辅助的条件下自动跟踪目标。

Feasibility analysis of phase- shift range system based on four- quadrant APD for tracking

The existing distance ranging systems based on the method of measuring phase do not provide information of the azimuth angle and elevation angle to achieve the target tracking, so it makes this system's application limited. In response to this phenomenon, under the conditions of not considering echo spot of non-uniformity and noise, the idea of using laser ranging system based on the receiver of four-quadrant APD to achieve tracking was proposed. Through theoretical analysis and simulation test, its result show that, the amplitude information extracted from the four quadrant signal's FFT, can calculate the azimuth angles and elevation angles; so in theory ranging system based on phase method on the conditions of not needing auxiliary equipment to provide information, can achieve automatic tracking.