Title :
Design of bulk wave EMAT using a pulsed electromagnet
Author :
Heng Zhang ; Ri-liang Su ; Shu-juan Wang ; Guo-fu Zhai ; Lei Kang
Author_Institution :
Sch. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China
Abstract :
Typically, permanent magnets used in the electromagnetic acoustic transducers (EMATs), will cause the difficulty of mobility for on-line detection of ferromagnetic materials. In this paper, a pulsed electromagnet EMAT (PE-EMAT) with the effective magnetic field duration of 400 μs is designed. A 2-D finite element model for the bulk wave PE-EMAT is presented including both the electromagnetic field and the acoustic field analysis. The designed PE-EMAT has shown the effectiveness of bulk wave generation and detection compared with the permanent magnet EMAT, which is verified by experiments.
Keywords :
acoustic transducers; bulk acoustic wave devices; electromagnetic devices; finite element analysis; nondestructive testing; 2D finite element model; acoustic field analysis; bulk wave EMAT design; bulk wave generation; electromagnetic acoustic transducers; electromagnetic field; ferromagnetic materials; magnetic field duration; on-line detection; pulsed electromagnet EMAT; Acoustics; Coils; Electromagnets; Magnetic fields; Magnetic flux density; Permanent magnets; Steel; EMATs; bulk wave; finite element model; pulsed eletromagnet;
Conference_Titel :
Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-4731-7
DOI :
10.1109/FENDT.2014.6928272
