Abstract
Electromagnetic acoustic transducers (EMATs) have been widely applied for non-contact and coupling-free ultrasonic testing (UT) of metal structures. In this paper, a new EMAT of flexible film type with thickness less than 1mm, which uses dual coil configuration but without a permanent magnet, is proposed for both ultrasound generation and detection. Instead of using permanent magnet, a planar magnetic coil fed with a rectangular-pulsed current with duration about 1.5ms is used to generate magnetic flux in the test objects. The obvious advantages of the proposed flexible film EMAT are that it can be easily applied for non-contact and coupling-free UT of curved structures and objects with very narrow inspection space. Pulsed electromagnetic fields and the induced ultrasound waves are studied by simulation and experiment. The results show that the flexible film EMAT has a good performance for generating and receiving ultrasonic waves and can be easily applied for testing of curved structural component with narrow inspection space.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
