Angiography Machine's Motion Control System Design Based On CAN Bus

Along with the development of country economic and the improve of peoples' standard of living, have bring forward more requires for medical instrument and heath protective equipment, one kind of medical equipment especially for cardio vascular disease named Digital Subtraction Angiography is popular among hospitals, but this kind of high level equipment almost import, special expensive. So in order to fulfill the homemaker, the research and exploitation of Digital Subtraction Angiography is imperative under the situation.The design of Digital Subtraction Angiography mostly includes the three parts of image collection, image processing and motion control. This paper emphasizes the design of motion control system. In order to realize opening correspondence and the distributional control simultaneously, applying CAN bus in the system of motion control of angiography and bringing out the whole design project. This article has introduced the physical layer communication mechanism of CAN bus, CAN communication protocol and high application layer communication protocol CANopen protocol. Described the structure of entire motion control system and principal of work, designed the slaved nodes and the interface between the master and slaves.Workstation acts as the master inspecting and controlling in all, corresponding with slave nodes through CAN bus, get the collected information of slave nodes and data processing, sent command to executive nodes. Slaves include the node of system position information feedback and various axes movement carries out nodes, and then constituted one multiple spindle main line type distributional motion control system. Complete the entire system debug and the Debug result indicated that hardware circuit brief and credible, the system obtain the design require, the motion control system is precise, fast and steady.