Indirect Measurement of Vibrating Surface of Ultrasonic Transducer Using Optical Computerized Tomography and Acoustical Holography
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概要
- 論文の詳細を見る
We propose a method for the indirect measurement of the vibrating surface of an ultrasonic transducer using a combination of the Michelson interference method, optical computerized tomography (O-CT), and acoustical holography (AH). Ultrasonic fields affect the phase of a light passing through the fields. The phase change, including information on the sound pressure, is acquired using a Michelson interferometer. Projection data along the optical axis is obtained by one-way linear scanning, and complex sound fields are reconstructed in a region of $64\times 64$ mm2 by CT using 36 projections. Then using AH, the complex sound pressure in the vibrating surface of the transducer is reconstructed in a region of $24\times 24$ mm2, which is 10.0 mm distant from the transducer, using the acquired sound fields. The method does not require that the light irradiates the vibrating surface of the transducer. The experimental results are in agreement with the numerical results.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-07-30
著者
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Masuyama Hiroyuki
Electronic Mechanical Engineering Department Toba National College Of Maritime Technology
-
Mizutani Koichi
Graduate School Of Systems And Information Engineering Univ. Of Tsukuba
-
Wakatsuki Naoto
Graduate School Of Systems And Information Engineering University Of Tsukuba
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Ohbuchi Takeshi
Graduate School Of Systems And Information Engineering University Of Tsukuba
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Shibata Shingo
Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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Mizutani Koichi
Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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