基于VISA的程控电源仿真测控系统设计

摘要

针对阴极试验系统中可靠性和寿命考核的需求，对程控电源进行自动控制，通过对各种测控方式进行比较，基于虚拟仪器系统结构体系（ Virtual Instrument Software Architecture， VISA ）库，利用程控仪器标准命令（ Standard Commands for Programmable Instruments， SCPI）指令对可编程电源进行仿真测控设计。实现对多工位程控电源的并行测控，给出了完整的设计方案和实现方法。试验结果表明，该系统顺利完成了阴极筛选、数据采集和日志存储等阴极试验考核工作，试验结果准确可靠，改进了手动试验工作效率低、实验记录不准确的问题。%In view of the requirement of reliability and life expectancy assessment in cathode test system,the programmable power supply are automatically controlled.By comparing various measurement and control methods,based on the VISA library,a system of pro⁃grammable power supply simulation and control is designed using SCPI commands.The parallel measurement and control for the multi⁃station programmable power supply is implemented.The complete design scheme and realization method are given.The practical applica⁃tion shows that this system can successfully complete such cathode test tasks as cathode screening,data acquisition and logging storage. The test results are accurate and reliable.The system solves such problems as low work efficiency in manual testing and inaccuracy in test records.