基于LabVIEW的燃料元件远场涡流式在线检测系统研究

Development of Eddy Current Test System for Fuel Element Based on LabVIEW

球床式高温气冷堆在运行中需要精确控制燃料元件的数量和质量。采用虚拟仪器技术,研制了一套基于LabVIEW的燃料元件远场涡流式在线检测系统,能够准确测量燃料元件的数量,并把存在缺陷的燃料元件分选出来。系统由涡流检测硬件电路、上位计算机、数据采集卡以及相关软件组成。重点介绍了硬件电路中的激励源、前置放大电路和相敏检波模块的设计。系统完成后,对石墨球进行了过球计数和缺陷检测的实验,结果表明系统具备良好的检测性能。

Fuel element plays an important role in high temperature gas-cooled reactor-pebble-bed module. For adjusting the fuel element precisely, an eddy current test system based on LabVIEW was developed to count the plumbago ball precisely and select the defective balls. The system was composed of the hardware circuit, the computer, the data acquisition card and relative softwares. The design of the excitation source, head amplifier circuit and the phase-sensitive detector was introduced in detail. The plumbago balls were counted and defects were tested by this system, and the results showed that the system is with good test capability.