传感技术学报Issue(4)：498-502,5.DOI:10.3969/j.issn.1004-1699.2015.04.008
电磁超声检测钢板厚度实验的参数优化∗
The Experiment Parameters of The Steel-sheet Thickness Measurement By Electromagnetic Ultrasonic
摘要
Abstract
In order to improve the SNR of the thickness measurement testing,study the effects caused by the excita-tion signal and transducer lift-off distance, setting the electromagnetic ultrasonic experiment system. Using the system RITEC-SNAP 5000 produced high-energy sine wave to excite the electromagnetic ultrasonic transducer ( EMAT) ,by adjusting the frequency of the excitation signal,pulse width,change the lift-off distance to observe the change of the ultrasonic echo amplitude. The experiment results showed that,when the excitation frequency was e-qual to the inherent frequency of EMAT,the transducer high worked efficiency;using six cycles of pulse sequence, the wave boundary between before and after was apparent;in order to obtain larger echo amplitude,the lift-off dis-tance should be minimized.关键词
电磁超声/无损检测/厚度测量/激励频率/提离距离Key words
electromagnetic ultrasonic/nondestructive testing/thickness measurement/excited frequency/lift-off distance分类
通用工业技术引用本文复制引用
江念,王召巴,陈友兴,陈玉..电磁超声检测钢板厚度实验的参数优化∗[J].传感技术学报,2015,(4):498-502,5.基金项目
国家自然科学基金项目(61201412) （61201412）
