双模式高度表的测高系统设计与研究

将恒定差频和恒定周期两种体制用于一个调频式高度表测高是一次新的尝试。本文介绍了一种基于C8051F330单片机与RS422总线的某型无人机双模式高度表的测高系统。在测高系统原理分析的基础上，建立了延迟时间可随高度数据而改变的测高系统。从测量方法和测试结果上分析，测量数据结果准确且稳定性好。

Desgin and Reseach of Graduate Measurement System about the Double-module Altimeter

It is a new experience to apply constant slip frequency scheme and constant period scheme to one frequency modulation radio altimeter for graduate measurement, This paper introduces the measuring simulation system of UVR＇Double-module Altimeter based on C8051F330 single-chip microoomputer and RS422 bus. On the basis of analyzing the principle of graduate measurement, Hard- ware-in-the-loop simulation system of which delayed time can be changed with the graduate measuring simulation data is built. Measuring data is accuracy and stable on the view from measurement methods and test results.