基本対称モードのラム波用電磁超音波探触子の薄鋼板中での送受信機構

概要

論文の詳細を見る
The mechanism of electromagnetic acoustic transducer (EMAT) for fundamental symmetrical Lamb wave using magnetostrictive effect in thin steel sheet was studied. The EMAT was constructed from the magnet for loading the parallel field to the sample surface and the meander coil for carrying the transmitting current. First the field dependence of the received signal amplitude and the phase for the transmitter and the receiver EMAT at the two different positions of the meander coil was investigated. Next the driving mechanism was discussed on the basis of the experimental results. This paper shows that this type of EMAT works using the time and spatial change of the synthesized magnetic field and has the different driving mechanism under the lead lines and between the lead lines of the meander coil.
一般社団法人日本機械学会の論文
1998-08-25