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为了避免运营中偶尔出现的列车故障危及行车安全,必须对线路上运行的列车进行连续的或周期性的监示。这种监示虽不再需要人工,但却十分费钱。因此,列车监示系统既要百分之百地可靠,又要减少投资费用。连续监示,要求每辆车上均装有一套相应的设备。为了对大批车辆进行检验,对各种判断列车故障方法所需费用进行比较结果表明,采用定点系统(周期性监示)为好。为此,西德联邦铁路(DB)1976年决定建造少
In order to avoid the occasional train failure in operation endangering the driving safety, the train running on the line must be continuously or periodically monitored. This kind of supervision, though no longer need labor, but it is very expensive. Therefore, the train monitoring system must be 100% reliable, but also reduce investment costs. Continuous monitoring, requiring each car is equipped with a corresponding set of equipment. In order to test a large number of vehicles, the various methods for judging the cost of train failure are compared, indicating that the use of fixed-point system (periodic monitoring) is better. To this end, the German Federal Railway (DB) in 1976 decided to build less