基于LabVIEW的高功率微波驱动源监控系统

针对高功率微波源对前级驱动电源的计算机自动控制要求，设计了一套1 200 kV高功率微波驱动电源监控系统。系统采用多功能数据采集卡控制大功率调压器产生连续可调的工频电压，再经过环氧高压变压器和整流硅堆等转换为直流高压，对储能电容进行充电控制；采用高速数据输入输出卡控制触发系统按时序进行工作；监测计算机通过RS-485串口方式对直流高压、闸流管阳极电压、闸流管对地电流等进行实时状态监测；控制主机通过以太网与中央控制计算机实现通讯，可以单独控制电源工作，也可以通过中央计算机统一协调工作；采用LabVIEW作为软件开发平台，利用图形控件完成整个电源系统的控制监测等功能的设计；为了解决因电磁干扰强而引起的地电位抬高、高压采集不正常等问题，系统的软硬件都融入了可靠性设计。实验结果表明，该系统工作可靠稳定，实时性强，界面友好，操作简单，具有良好的可扩展性和移植性。

Monitoring system of high power microwave source driver based on LabVIEW

A monitoring system for 1 200 kV high-power microwave source driver is designed for automatic control requirements. In the system, a high-power voltage regulator produces continuous adjustable voltage with a multifunction DAQ card, which is transformed into direct current high voltage by high voltage epoxy transformer and silicon diodes and so on. A high-speed I/O card makes the trigger system work according to timing. The master computer can accomplish real-time monitoring of DC high voltage, thyratron anode voltage, ground current and other devices in the driver via serial interface of RS-485, and the central host computer communicates with the control computer via Ethernet. The driver can work individually or harmonically with the central computer. LabVIEW is adopted as the development tool of the software system. Moreover, in order to decrease the influences of high voltage and intense current produced in high pulsed power experiments on operational site, reliability design is blent in the system hardware and software. The experimental results show that the system is an easily-manipulated, real-time system with user-friendly interface, performing reliably, and stably by rule and line, and it has good expansibility and portability in intelligent control for high-power microwave source driver.