超磁致伸缩传感器背衬层参数优化的实验研究

doi:10.16180/j.cnki.issn1007-7820.2021.02.012

摘要/Abstract

摘要：

传统超磁致伸缩传感器背衬层吸收余振效果不佳,影响激励性能。文中采用不同参数的背衬层进行对比试验来研究背衬层参数与超磁致伸缩传感器激励性能的关系,并确定了最优的背衬层配比为编号3,长度为25 mm,厚度为6 mm。利用该背衬层的传感器与传统背衬层的传感器分别检测同一管道,结果表明优化后的超磁致伸缩传感器检测缺陷信号的回波系数提升10.7%,信噪比提升10.6 dB,盲区检测时间缩短0.4×10^-4 s,证明了优化后超磁致伸缩传感器背衬层的实用性。

关键词: 超声导波, 超磁致伸缩传感器, 背衬层, 参数优化, 试验, 性能分析

Abstract:

The backing layer of the traditional giant magnetostrictive sensor poorly absorbs the residual vibration, which affects the excitation performance. In view of this problem, the relationship between the backing layer parameters and the excitation performance of the magnetostrictive sensor is studied by using different parameters of the backing layer. The optimum backing layer ratio is determined to be number 3, the length is 25 mm, and the thickness is 6 mm. The sensor with this backing layer and the sensor with the traditional one are used to detect the same pipe respectively. The test results show that the echo coefficient is increased by 10.7%, the SNR is increased by 10.6 dB, and the dead zone detection time is shortened by 0.4×10^-4 s, which further verifies the practicability of the optimized giant magnetostrictive sensor backing layer.

Key words: ultrasonic guided wave, magnetostrictive sensor, backing layer, parameter optimization, test, performance analys

中图分类号:

TN04

姜银方,胡华健,郭永强,吴搏. 超磁致伸缩传感器背衬层参数优化的实验研究[J]. 电子科技, 2021, 34(2): 68-73.

JIANG Yinfang,HU Huajian,Guo Yongqiang,WU Bo. Experimental Study on Parameters Optimization of Magnetostrictive Sensor Backing Layer[J]. Electronic Science and Technology, 2021, 34(2): 68-73.

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类别	激励幅值	回波系数	信噪比	盲区时间
新型超磁致伸缩传感器	1.35 V	34.1%	30.7 dB	2.8×10^-4 s
传统超磁致伸缩传感器	0.81 V	23.4%	20.1 dB	3.6×10^-4 s