An improved method for extending approach locking section of train route
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摘要: 列车进路接近锁闭状态对列车冒进信号后的安全防护起到重要作用。现有列车进路接近锁闭处理逻辑沿用传统继电联锁的设计原理，能满足常见应用场景的需求，但不能适用于接近锁闭区段延长至后方两段及以上进路的场景；此外，在特定故障场景下，还存在列车进路错误转为接近锁闭状态的缺陷。为此，在分析现有继电电路逻辑缺陷的基础上，提出一种改进的列车进路接近锁闭区段延长处理方法。文章介绍继电电路实现接近锁闭的缺陷及改进后接近锁闭延长方法的实现过程，详细阐述其处理逻辑。该方法能适用于接近锁闭区段延长至后方两段及以上进路的应用场景，规避了人工编制接近锁闭处理逻辑带来的风险，解决了进路内道岔失去表示后列车进路错误转为接近锁闭状态的问题。Abstract: The approach locking state of a train route has a critical effect on protecting the train after it overrunning the route. The current approach locking processing logic of the train route is based on the design theory of traditional relay interlocking, which can meet the requirement of general scenarios but can not meet that of the scenarios in which the approach locking section will be extended up to or beyond the second route ahead of the train. Besides, this processing logic might lead to the state of the train route wrongly converting to approach locoking in the scenario of special failures. So, this paper puts forward an improved method for extending the approach locking section of the train route on the basis of analyzing the defects of traditional relay circuit logic. This paper discusses the defects in the current design theory of traditional relay circuit and describes the implementation procedure of the improved method especially with an elaboration on its processing logic. This method can be used for such scenarios that the approach locking section should be extended up to or beyond the second route ahead of the train and can avoid the risk resulting from manually programming approach locking logic. Meanwhile, this method can also solve the problem of the train route wrongly converting to the approach locking state when the indication of a switch in the train route is lost.
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