The Research on The Speed Acquisition of The Elevator Overspeed Governor Test Device

This paper mainly studies the elevator over speed governor test platform.First,in the basis of PC/PLC serial communication protocol,this article gives full explanation on the communication among the Mitsubishi FX1N series PLC,PC,encoders and servo motor.It explains the methods to realize communication between PC and PLC and introduced communication protocols as well as hardware connections between them.Second,in this article,it provided an analysis on the device and algorithm that used in speed acquisition.