{"title":"A flexible EMAT enhanced with array magnetic core for inspection of curved structure","authors":"","doi":"10.1016/j.sna.2024.115869","DOIUrl":null,"url":null,"abstract":"<div><p>Electromagnetic acoustic transducer (EMAT) is widely applied for non-contacting ultrasonic testing of metallic structures. In this paper, an enhanced flexible EMAT is proposed and optimized to improve ultrasonic energy conversion efficiency by adopting an array magnetic core to a racetrack coil-type flexible electromagnetic magnet in replacement of the conventional bias permanent magnet. Numerical simulations and experimental investigations conducted with prototype transducers of the enhanced flexible EMAT show that the bias magnetic field and the energy conversion efficiency of the new EMAT can be significantly enhanced due to the application of the magnetic core array. Thanks to the advantage of flexible magnet structure, it is proved that the proposed new EMAT has good performance to detect surface cracks in curved metallic structural components.</p></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":null,"pages":null},"PeriodicalIF":4.1000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors and Actuators A-physical","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S092442472400863X","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
Electromagnetic acoustic transducer (EMAT) is widely applied for non-contacting ultrasonic testing of metallic structures. In this paper, an enhanced flexible EMAT is proposed and optimized to improve ultrasonic energy conversion efficiency by adopting an array magnetic core to a racetrack coil-type flexible electromagnetic magnet in replacement of the conventional bias permanent magnet. Numerical simulations and experimental investigations conducted with prototype transducers of the enhanced flexible EMAT show that the bias magnetic field and the energy conversion efficiency of the new EMAT can be significantly enhanced due to the application of the magnetic core array. Thanks to the advantage of flexible magnet structure, it is proved that the proposed new EMAT has good performance to detect surface cracks in curved metallic structural components.
期刊介绍:
Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas:
• Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results.
• Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon.
• Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays.
• Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers.
Etc...