基于MSP430的移频信号测试系统的实现

随着我国电气化铁路的不断普及,移频信号的准确、实时检测对于列车的安全行驶起着至关重要的作用。本文通过分析移频信号的特性,针对铁路运行强干扰性的环境,利用脉冲计数式鉴频和滤波原理设计了一个基于MSP430的移频信号测试系统,实现了移频信号载波信号频率、低频调制信号频率和电压三项参数的测定。通过实际测量,该系统基本满足实际需求,并且其体积小、成本低、操作方便、性能稳定,测量精度高,抗干扰性强,具有广阔的应用前景。

Realization of frequency-shift keying signal testing system based on MSP430

With the widespread use of the electrified railway,real-time detection of security on the train plays a vital role.The article analyzes the property of FSK signal and the intense interference surroundings of railway operation.Based on the principle of the pulse-counter frequency discrimination and filter,a testing system which is used to test the FSK signal is designed by making using of MSP430.The testing system can measure carrier signal,low frequency modulation signal and voltage of FSK signal.Through measuring,the system can satisfy the practical request.Moreover,it is small,cheap,convenient,stable,accurate,and has strong anti-jamming performance.On the same time,it has broad application prospect.