采用差频测相技术的高精度测距系统研究

摘要

针对无人机着陆引导系统测距精度低的问题,采用了一种基于应答方式的差频测相的测距方法.通过对差频测相方法的详细分析,结合无人机着陆引导系统中测距精度的要求,实现了无人机高精度无线电测距系统的设计,并对该测距系统的主要误差进行分析,提出了相应的解决方法.与当前无人机无线电原有测距方式相比,可将测距精度提高一个量级,使系统测距误差由米级降至分米级,满足了无人机着陆过程中的高精度测距要求.%Aimming at the low ranging precision of UAV landing guidance system ,a ranging method based on response of phase-shift measurement is adopted. Through analyzing the phase-shift measurement method in detail and combining the ranging requirement of the system , achieves the design of high precision of UAV radio ranging system, and some specific methods are introduced by analyzing the main error of the system. Compared with the current UAV original radio ranging mode , ranging precision improves an order of magnitude, finally makes the ranging error by meters to decimeters and meets the requirement of high precision ranging of UAV landing guidance system.