【Abstract】This paper deals with a method which adopted the photoelectricity sensor to measure motor rotation speed based onAT 89C51monolithic microcomputer.The hardware system includes the pulse signal creation,the pulse signal processing and the manifestation mold piece.The point of this paper is to analyze the pulse signal processing electric circuit,and adopt the C language plait distance.The result express that the method is simple,the accuracy is high and advantage stability.
【Keywords】measurement of rotation rate; MCU; photoelectricity sensor；electric machines; Pulse;
