作者：常俊杰1,2, 曾雪峰1
作者单位：1. 南昌航空大学 无损检测技术教育部重点实验室, 江西 南昌 330063;
2. 日本探头株式会社, 横滨 232-0033
关键词：空气耦合超声;导波;开闭器;水层厚度
摘要：
针对传统接触式超声检测高压电线杆开闭器水层厚度存在漏电风险问题，提出使用非接触式空气耦合超声导波技术对开闭器中水层厚度进行测量。对开闭器水中导波传播过程进行仿真并计算水层厚度；搭建开闭器实验室平台，控制水层厚度，改变换能器之间距离，对回波信号进行分析并计算水层厚度；控制换能器之间距离，改变水层厚度，对回波信号进行分析并计算水层厚度。通过仿真与实验使用几何声学对水层厚度进行计算得出关系式，将仿真与实验两者结果进行对比，有高度一致性，验证空气耦合超声导波法对开闭器中水层厚度测量的可行性与准确性。该方法可为测量开闭器中水层厚度提供新思路。
Research on water depth of switch on column based on air-coupled ultrasonic guided wave
CHANG Junjie1,2, ZENG Xuefeng1
1. Key Laboratory of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China;
2. Japan Probe Co., Ltd., Yokohama 232-0033, Japan
Abstract: Aiming at the problem that leakage of electricity in the process of traditional contact ultrasonic detection of water layer thickness of high-voltage wire pole switch, a non-contact air-coupled ultrasonic guided wave technology is proposed to measure the water layer thickness of the switch. Simulated the guided wave propagation process in the water of the switch and calculated the thickness of the water layer. A laboratory platform was set up, and the thickness of the water layer was controlled, the echo signal was analyzed and the water layer thickness was calculated by changing the distance between the transducers. Then, the distance between transducers was controlled, the thickness of water layer was changed, the echo signal was analyzed and the thickness of water layer was calculated. The relationship between simulation and experiment is obtained by using geometric acoustics to calculate the thickness of water layer. The results of simulation and experiment are highly consistent, which verifies the feasibility and accuracy of the air-coupled ultrasonic guided wave method for measuring the thickness of water layer in the switch and provides a new method for measuring the thickness of water layer in the opener and closer. It provides a new development for air-coupled ultrasound.
Keywords: air coupled ultrasound;guided wave;switch;water layer thickness
2019, 45(9):27-32 收稿日期: 2018-11-14;收到修改稿日期: 2018-12-12
基金项目: 国家自然科学基金资助项目（11464030）；无损检测技术教育部重点实验室（南昌航空大学）开放基金课题（F010404）
作者简介: 常俊杰(1964-),辽宁大连市人,副教授,博士,主要从事超声无损检测的应用技术研究及检测设备的研发等工作
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