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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。
With the continuous popularization of electrified railways in our country, the accurate and real-time detection of frequency-shifted signals plays a crucial role in the safe driving of trains. In this paper, by analyzing the characteristics of frequency-shifted signals, aiming at the strong interference environment of railway operation, this paper designs a frequency-shift signal test system based on MSP430 by using pulse counting frequency discrimination and filtering principle, Measurement of signal frequency and voltage three parameters. The actual measurement, the system basically meet the actual needs, and its small size, low cost, easy operation, stable performance, high measurement accuracy, strong anti-interference, has broad application prospects.