摘要
脉冲涡流检测技术作为当前无损检测技术中的一种新技术,能够快速方便地检测金属构件中的缺陷;文中根据脉冲涡流检测信号源的特点,采用Direct Digital Frequency Synthesis(直接数字频率合成,简称DDS)技术,设计了一种参数可调式脉冲波形信号源的脉冲涡流检测系统;系统由脉冲涡流检测硬件电路、上位机、数据采集卡和相关软件组成;最后使用AD9850芯片产生1kHz、50%占空比的方波激励对标准缺陷试件进行实验,并提取特征值对试件的三种定量缺陷区分进行了研究。
The pulsed eddy current detecting technology is a new branch of the eddy current nondestructive testing and can detect the defects in the metal conductor equipments quickly and easily. Based on the characteristics of the pulsed signal generator, a pulsed eddy current detecting system with parameters adjustable pulsed signal generator, using direct frequency synthesis technology, was designed. The PEC testing system is combined of hardware circuit, PC, data acquisition card and relevant software components. With AD9850, a square wave of lkHz is generated as excitation of defect detection experiment from which eigenvalues are calculated and identification of three quantitative PEC defects were discussed.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第8期1817-1820,共4页
Computer Measurement &Control
关键词
脉冲涡流检测
DDS
缺陷分类
pulse eddy current detecting
direct digital frequency synthesis
the identification of defects
作者简介
宋琦华（1986-），男，江西人，工学硕士，主要从事无损探伤、智能仪器仪表等的方向研究。
