Design of signal transmission system of rotary joint component based on CPLD
GU Wenbin, WANG Yi
(College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)
 

Abstract: Aiming at the problem of the signal transmission between the fixed control system and the external rotation executive mechanism, a research included the circuit structure, control module and signal was done, and the optical communication technique was applied to the signal transmission system of rotary joint component. Using the technique of largescale programmable controller, a signal transmission system of rotary joint component which included control signal reception, signal encoding, photoelectric conversion, signal decoding and signal feedback was designed. This high-speed bidirectional signal transmission system used the CPLD chip as the communication controller and laser signal as the communication channel. A prototype system was developed to test the data accuracy and optical signal loss in the process of the signal transmission. The results indicate that this signal transmission system has simple structure, more reliable, lower optical signal loss and applicable.
Key words: rotary joint component; complex programmable logic device （CPLD）; signal transmission control; VHDL