摘要
针对现有焊缝检测存在换能器尺寸大,带宽窄,成本高和应用灵活性差等局限,该文研制出一种八通道压电微型超声换能器阵列探头。阻抗频率和回波特性测试结果表明,理论模型能有效地指导超声换能器阵列设计,工作频率偏差不超过2%,-6 dB相对带宽可达87.85%。利用探头实现了对25 mm厚度的标准对接钢板试块内部缺陷的准确识别,检测分辨率优于1 mm。该探头体型小且各阵元能独立或协同工作,扫描模式应用灵活,可为焊接钢板的健康监测提供技术参考。
In view of the limitations of large size of transducer,narrow bandwidth,high cost and poor application flexibility in existing weld detection,an eight-channel miniaturized piezoelectric ultrasonic transducer array probe has been developed.The testing results of the impedance-frequency and ultrasonic echo characteristic show that the theoretical model can effectively guide the design of the ultrasonic transducer array.The operating frequency deviation of the designed ultrasonic transducer array is less than 2%and-6 dB relative bandwidth can be as high as 87.85%.The fabricated probe is used to identify the internal defects of the standard butt steel plate test block with a thickness of 25 mm and the detection resolution is better than 1 mm.The probe has a small size and each array element can work independently or collaboratively,and the scanning mode is flexible,which can provide a technical reference for health monitoring of welded steel plates.
作者
孙长河
李博伦
黑创
罗明璋
杜国锋
刘玉菲
SUN Changhe;LI Bolun;HEI Chuang;LUO Mingzhang;DU Guofeng;LIU Yufei(Electronics&Information School,Yangtze University,Jingzhou,Hubei Province,434023;School of Urban Construction,Yangtze University,Jingzhou,Hubei Province,434023;Key Laboratory of Optoelectronic Technology&System(Chongqing University),Ministry of Education,Chongqing,400044)
出处
《压电与声光》
CAS
北大核心
2023年第4期595-600,共6页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(52205587)
湖北省技术创新专项重大基金资助项目(2019AAA011)
湖北省自然科学基金青年项目(2022CFB734)
湖北省教育厅科学技术研究计划青年人才项目(Q20201309)
光电技术及系统教育部重点实验室(重庆大学)访问基金资助项目。
关键词
钢板对接焊缝
压电
超声换能器
阵列
缺陷检测
butt weld of steel plate
piezoelectric
ultrasonic transducer
array
defect detection
作者简介
孙长河(1991-),男,湖北省随州市人,副教授,硕士生导师,博士,主要从事压电超声换能器、智能感知及能量收集等的研究。
