Abstract:

Speed is of vital importance in the motor control system.And the precision,real-time and stability of motor speed measurement directly influence the motor speed control system performance.This paper introduces a design of speed monitoring system based on LabVIEW,which chooses absolute optical encoder and single chip microcomputer as front-end speed signal acquisition system,and transmits the data to the PC through RS-232 serial communication.The acquired speed signal is real-timely processed,displayed and stored by using powerful functions of data processing and displaying of LabVIEW.This design has been tested in switched reluctance motor speed control system.Experimental results verify that this method features good human-machine interface,wide range speed measurement,high accuracy,fast response and strong anti-interference ability.

Key words: LabVIEW;absolute optical encoder;single chip microcomputer