适用于在线检测的涡流检测系统研制  

Research and Development of Eddy Current Testing System Suitable for On-line Detection

作　　者：李燕山[1] 连红运[2] 李运飞[3] 

机构地区：[1]中州大学工程技术学院 [2]河南职业技术学院机械电子工程系,河南郑州450046 [3]清华大学机械工程系,北京100084

出　　处：《自动化仪表》2008年第7期60-62,65,共4页Process Automation Instrumentation

摘　　要：为了准确地测量核反应堆中石墨球的数量,以及把存在缺陷的石墨球筛选出来,研制了适用于在线检测的数字化涡流检测系统。论述了其硬件电路,该电路可产生性能良好,频率、幅值稳定的激励信号,频率范围为0～5MHz;结合上位计算机、数据采集模块以及LabVIEW虚拟仪器软件平台,实现了信号的采集、分析、处理与显示。结果表明,该系统可以精确测量石墨球的个数和准确筛选出有缺陷的石墨球。In order to precisely measure the quantity of graphite nodules in nuclear reactor and sieve the defective ones, the digitized eddy current testing system suitable for on-line detection is researched and developed. The hardware circuit of the system is described. The circuit generates energizing signals with excellent waveform, stable frequency （range of 0 - 5 MHz ） and stable amplitude. Combining with host computer, data acquisition module and LabVIEW virtual instrument software platform, the system offers functions of acquisition, analysis, processing and display of the signals. The result shows that the system is capable to precisely calculate the quantity of the graphite nodules and sieve the defective nodules.

关 键 词：涡流检测 采集卡 直接数字频率合成 自动平衡 相敏检波 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置] TG115.284[自动化与计算机技术—控制科学与工程]