| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === The purpose of a bypass system is to bypass the fault source of an operating system so that the system can resume operation. When a main earthquake sensor of Taiwan High Speed Rail breaks down or malfunctions, it may order running trains to stop. The purpose of the bypass system designed in this research is to bypass the faulty main earthquake sensor via remote control when it breaks down or malfunctions, so that Taiwan High Speed Rail can reduce financial loss.
The bypass system designed in this research contains several workstations and bypass devices. LabVIEW is used to design the man-machine interface of the workstations, and bypass devices include programmable logic controllers (PLC), safety relays, power supplies and bypass relays. The communication protocols of the bypass system are RS-232 and RS-422. The workstations can send control commands to the equipment in communication rooms via the communication system of Taiwan High Speed Rail to control bypass relays through the interlocking circuits between PLCs and safety relays.
Test results in the laboratory show that these workstations can monitor and control the status of bypass devices. When any element in the bypass device fails, its status will show up on the man-machine interface and the information of the event will be saved in the MySQL database. Experimental results confirm the feasibility of the bypass system designed in this research.
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