基于MAX260的铁路移频检测系统设计

Design of Railway Frequency Shift Detection System Based on MAX260

为可靠检测移频信号,文章设计出利用STC系列单片机控制MAX260滤波的移频信号检测系统,对移频信号进行窄带滤波,实现对铁路移频信号的自动识别和自动检测。通过实际铁路移频信号的测试,证明该系统是有效的,移频信号的载频检测与调制频率检测误差都比较低,具有系统简单、可靠性高的优点。

In order to reliably detect the frequency-shift signal ,this article designed the frequency-shift signal detection system which uses STC series single-chip microcomputer to control the MAX260 filter, with narrow-band filtering for frequency-shift signal, and realized the automatic recognition and automatic detection of railway frequency shift signal.This system was proved effective through the test of actual frequency shift signal of the railway, and the carrier frequency detection and the modulation frequency detection error of frequency shift signal were all relatively low,which has the advantages of simple system and high reliability.