Abstract: There are multiple departure locations at Sunjia Station on the Harbin-Jiamusi Rapid Railway, and the station type is complex. During on-site testing, it is found that there are cases of mistakenly receiving HU codes during train operation when handling some arrival routes. Based on the transmission principle of cab signaling, this paper analyzes and studies the causes of train code errors, proposes solutions for each reason, and focuses on optimizing the design of coding circuits from the perspective of using different basic carrier frequencies for train arrival and departure routes, adding code switching relays, and other optimization design schemes. After the optimization scheme is adopted on site, the impact of code errors on actual operation is avoided; Based on the optimized design scheme, design suggestions have been proposed for similar projects to avoid erroneous code reception, providing design ideas for future projects.

Key words: misreceived code, cab signal, coding, optimization design

摘要： 哈佳铁路孙家站存在多个发车口，站型复杂，现场试验过程中发现办理部分接车进路后，列车运行过程中存在误接收HU码的情况。结合机车信号传输原理，对产生列车误收码问题的原因进行分析和研究，针对各原因提出解决方案，并着重从电码化电路设计优化的角度提出接发车进路采用不同基本载频、增设切码继电器等优化设计方案，现场采用优化方案后，避免了误收码问题对实际运营的影响；结合优化设计方案，对同类工程提出避免产生误收码的设计建议，为后续工程提供设计思路。

关键词: 误收码, 机车信号, 电码化, 优化设计