| 铁电驻极体空气耦合声换能器的研制 |
| |
| 引用本文： | 童立坤,项延训,邓明晰,邱勋林. 铁电驻极体空气耦合声换能器的研制[J]. 声学技术, 2018, 37(5): 507-510 |
| |
| 作者姓名： | 童立坤 项延训 邓明晰 邱勋林 |
| |
| 作者单位： | 华东理工大学, 上海 200237,华东理工大学, 上海 200237,重庆后勤工程学院, 重庆 401331,波茨坦大学物理和天文系, 波茨坦 14476 |
| |
| 基金项目： | 国家自然科学基金项目（11474093） |
| |
| 摘 要： | 基于多孔聚丙烯铁电驻极体薄膜系统研制了平面型和球型聚焦空气耦合超声波换能器。平面型换能器孔径为20mm，两个球型聚焦换能器的孔径和焦距分别为20mm和35mm、30mm和40mm。使用激光干涉仪测得了三个换能器作为发射器工作时的带宽和谐振频率，并且将在脉冲回波模式下测得的换能器作为接收机工作时的响应与激光干涉仪测试结果进行比较。最后选择孔径为20mm的球型聚焦换能器，在脉冲回波模式下对不同直径孔的聚乙烯阶梯楔进行扫描成像。
|
| 关 键 词： | 空气耦合超声 多孔聚丙烯铁电驻极体 换能器 |
| 收稿时间： | 2018-01-26 |
| 修稿时间： | 2018-03-18 |
Development of EMFi-based air-coupled ultrasonic transducer |
| |
| TONG Li-kun,XIANG Yan-xun,DENG Ming-xi and QIU Xun-lin. Development of EMFi-based air-coupled ultrasonic transducer[J]. Technical Acoustics, 2018, 37(5): 507-510 |
| |
| Authors: | TONG Li-kun XIANG Yan-xun DENG Ming-xi QIU Xun-lin |
| |
| Affiliation: | East China University of Science and Technology, Shanghai 200237, China,East China University of Science and Technology, Shanghai 200237, China,Logistics Engineering University, Chongqin 401331, China and Department of Physics and Astronomy, University of Potsdam, Potsdam 14476, Germany |
| |
| Abstract: | The planar and spherically focused air-coupled ultrasonic transducers are developed based on electrical mechanical film (EMFi) system, which contains two-sided Al electrodes and cellular polypropylene (cPP) ferroelectret films. Three transducers are fabricated and tested. The planar one has a diameter of 20 mm. One of the spherically focused transducers has an aperture of 20 mm and a focal length of 35 mm; another has an aperture of 30 mm and a focal length of 40 mm. The bandwidth and resonance frequency of the transducer as a transmitter are obtained by using laser interferometer. As a receiver, the pulse-echo response of the transducer is compared with the results of laser interferometer test. Finally, the spherically focused transducer of 20 mm aperture is selected to scan the polyethylene (PE) ladder wedge with different diameter holes in pulse-echo mode. |
| |
| Keywords: | air-coupled ultrasonic cellular polypropylene ferroelectret transducers |
|
| 点击此处可从《声学技术》浏览原始摘要信息 |
|
点击此处可从《声学技术》下载免费的PDF全文 |
|
