基于PMN-PT的宽带高灵敏双谐振式声发射传感器研究  

Study on Wideband High-Sensitivity Dual-Resonance Acoustic Emission Sensor Based on PMN-PT

作　　者：宋洋 唐正凯 史汝川 林迪[2] 韩韬[1] 罗骋韬 SONG Yang;TANG Zhengkai;SHI Ruchuan;LIN Di;HAN Tao;LUO Chengtao(School of Electronic Information and Electrical Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Shanghai Institute of Ceramics,University of Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]中国科学院上海硅酸盐研究所,上海201800

出　　处：《压电与声光》2024年第1期112-117,123,共7页Piezoelectrics & Acoustooptics

基　　金：上海市科委人才项目(21YF1421500)。

摘　　要：声发射传感器被广泛应用于局部放电检测中,而基于PZT压电陶瓷的声发射传感器难以同时满足越来越高的灵敏度和带宽需求。该文设计了一种双谐振式声发射传感器,采用高性能铁电单晶PMN-PT作为压电振子,并使用谐振峰耦合,可同时提升灵敏度和带宽。所制备的传感器实现了76.2 dB的高灵敏度,20~105 kHz的大带宽,且具备良好的稳定性。对比基于PZT-5H的声发射传感器,其具有更高的灵敏度和信噪比。The acoustic emission sensors are widely employed in the partial discharge detection,but those based on PZT piezoelectric ceramics are difficult to meet the increasing demands for sensitivity and bandwidth simultaneously.This study designs a dual-resonance acoustic emission sensor using high-performance ferroelectric single crystal PMN-PT as the piezoelectric vibrator.The resonant peak coupling is used to improve the sensitivity and bandwidth simultaneously.The fabricated sensor demonstrates a remarkable sensitivity of 76.2 dB,along with a wide bandwidth of 20 kHz to 105 kHz.It exhibits excellent stability,surpassing PZT-5H-based acoustic emission sensors in sensitivity and signal-to-noise ratio.

关 键 词：PMN-PT单晶 PZT-5H陶瓷 双谐振式声发射传感器 局部放电检测 有限元模型 

分 类 号：TN804[电子电信—信息与通信工程] TN92[自动化与计算机技术—检测技术与自动化装置] TP212.1[自动化与计算机技术—控制科学与工程]