摘要
Abstract
To enhance the real-time performance,scalability,and reliability of CT detector nodes,and satisfy the bus communication re-quirements of the current slip ring equipment,a CT detector CANopen node design method is proposed.The proposed method involves hardware node design using the XMC4000 series micro-controller to build the hardware platform,as well as adaptation of hardware drivers and a real-time operating system.A customized object dictionary is designed to include command control and status feedback.By optimizing the state machine and message task flow,the real-time performance is improved.The test results show that the functionality complies with the CANopen protocol specifications,and the electrical characteristics meet the requirements for voltage,edge transition,and bit width testing.Additionally,under continuous transmission of 5 156 frames,the success rate reaches 100％,demonstrating high reliability.The bus delay maintains within 480 ns,ensuring favorable real-time performance.The designed object dictionary can be re-used and transplanted in CT systems with different hardware platforms,effectively supplementing the current medical device configura-tion file(CiA-412).关键词
CT探测器/CANopen/CAN/嵌入式系统/总线Key words
CT detector/CANopen/CAN/embedded system/bus分类
信息技术与安全科学
