叠加预发码电路JMJ及FMJ继电器电路的修改

摘要

97型25Hz相敏轨道电路叠加电码化预发码电路进行分析，发现JMJ及FMJ无延缓落下性能，引起在办理正线列车进路时轻车跳动或其他情况暂时无码，提出电路改进方案并应用于工程实践中。%According to the analysis of the overlap pre-coding circuit of 97-Type 25H phase detecting track circuits, the paper presents that JMJ and FMJ circuits have no delay-falling performance, which will cause shunt faults or other temporary no-codes when setting the train route for main line and puts forward the improved scheme of the circuits and the application of the scheme in the practice.