Meanwhile, it introduces the rotary encoder and its interface circuit to test the speed, LEM and its interface circuit to test the electric current, the communications interface circuit of DSP' s UART and PC' s RS232C, and so forth.
This paper introduces the working principle of electro-optic rotary encoder and the mode of its output signal, and its application in automatic production line.
Actual operation shows that using the rotary coder in the rotating angle digit process control system can bring about such advantages as accurate positioning, easy setting ,and safe and consistent operation.
On thebasisofspeed control with PLC and transducer,this paper forms a positionfeedbackma king use of pulse signal gained from the rotary coder and realizes the accurate displacement control of elevator.
Based on the bus technology of Profibus-DP, one kinds of the reservoir gate monitoring and control system is developed, the system is consisted with the PLC of S7-300 series as the core, and with one rotating coder acts as a feedback unit by detecting gate' s displacement, the touching screen as the interface between man and the system.
Power output due to concentric and eccentric contractions was measured using a power measurement instrument with a rotary encoder attached to the pulley.