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
宋洋 1唐正凯 1史汝川 1林迪 2韩韬 1罗骋韬1
作者信息
- 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
- 折叠
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.
Abstract
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 simultane-ously.This study designs a dual-resonance acoustic emission sensor using high-performance ferroelectric single crys-tal PMN-PT as the piezoelectric vibrator.The resonant peak coupling is used to improve the sensitivity and band-width 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Key words
PMN-PT single crystal/PZT-5H ceramics/dual-resonance acoustic emission sensor/partial dis-charge detection/FEM引用本文复制引用
基金项目
上海市科委人才项目(21YF1421500)
出版年
2024
NETL
NSTL
万方数据