エレベーターの過速検出機能の電子化に関する検討

抄録

Programmable electronic system (PES) is spread to much industrial fields like car, railway and so on because of establishing functional safety standard IEC61508 in 2000. There are some discussions to PES for elevator safety devices in Japan. To computerize safety devices, new safety system using PES is developed. The proposed system is focused on the safety devices on overspeed protection, and the system computerizes the safety device using dual encoder. To detecting failure on dual encoder, there are two methods that one is to stop in a moment by comparison, the other is to continue the safety operation after detecting a failure.