Weak Signal Detection Based on Electromagnetic Acoustic Transducer

摘要：

The Electromagnetic Acoustic Transducer (EMAT) detection technology is becoming increasingly important and widely applied in Nondestructive Testing (NDT) field. Although with the advantages of no contact with the measured object and without coupling agent, the conversion efficiency of EMAT is low, and the received signal is very weak. In this paper, to improve the quality of the received EMAT signal, a preamplifier based on the AD603 chip is design to receive the Lame wave in 20KHz-10MHz frequency range, and the gain of preamplifier is up to 120dB. The experiments result shows that this preamplifier can be used effectively to receive the weak EMAT signal, and it can meet the design requirements.

关键词： EMAT weak signal detection amp AD603

作者: Songgong Li Na Han Xiaoming Chen Ling Xin

作者单位: School of Information Engineering Dalian Ocean University Dalian, China Faculty of Electronic Information and Electrical Engineering Dalian University of Technology Dalian,

会议类型: 国际会议

会议名称: 2012 International Conference on Electric Technology and Civil Engineering(2012 电子技术与土木工程国际会议 ICETCE 2012)

会议地点: 三峡

会议语种:英文

页码: 1267-1270

在线出版日期: 2012-05-18（万方平台首次上网日期，不代表论文的发表时间）