Testing and Analysis of Redundant Switching Technology for Interlocking Computer Systems in Multiple Faults Scenarios

The safety and reliability of railway transit signal control systems are very important. As a tester, this article mainly introduces the redundant switching scenario between the Interlocking Computer subsystem and the Executive and Indication Units/Electronic Executive Units subsystem in the iLOCK-II computer interlocking products under multiple faults. It is found that the Interlocking Iomputer can judge the network condition and switch according to the system, but after expanding the testing scenario, it is found that the Executive and Indication Units/Electronic Executive Units cannot switch the system. After analyzing the problem and solving it, the problem is verified. This process enriches the requirements and application scenarios for redundant switching of interlocking computers, and also plays an important role in improving the functions of iLOCK-II series computer interlocking products.