25 Hz相敏轨道电路HF4-25型防护盒相位调整交叉连接改进方法

Improvement Method of HF4-25 Protection Box Phase Adjustment in 25 Hz Phase-detecting Track Circuit

针对现行HF4-25型防护盒相位调整方法存在的局限性,提出一种25 Hz相敏轨道电路相位调整交叉连接改进方法。在阐述防护盒工作原理及其电路阻抗特性基础上,分析现有相位调整方法的局限性;然后阐述所提出的相位调整交叉连接改进方法,通过理论分析验证所提改进方法的合理性;最后通过仿真测试验证所提改进方法的有效性。

To solve the limitation of the current phase adjustment method of HF4-25 type protection box,this paper proposes a cross connection improvement method of 25 Hz phase-detecting track circuit phase adjustment.Firstly,this paper analyzes the limitation of the current phase adjustment method based on the working principle and its circuit impedance characteristics of the protection box.Then the detail of the proposed method is described,in which rationality is verifi ed by means of theoretical analysis.Finally,the eff ectiveness of the proposed method is verifi ed by simulation test and the fi eld experiments.