Experimental Study on Intermediate Layer Made of (0–3) Composite Materials for Use in Air-Coupled Ultrasonic Transducers
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概要
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The (0–3) composite materials for the intermediate layer of a MHz-range air-coupled ultrasonic transducer were studied experimentally. The optimal value of the characteristic acoustic impedance for this intermediate layer was calculated using a transmission line model. The (0–3) composite materials were formed from a mixture of silicone rubber and hollow thermoplastic microspheres at various weight ratios, and their acoustic properties were measured, and compared with those of a Reuss model. The measured values of the acoustic properties of the composite materials agreed well with the theoretical estimation. The transmission and reception of an air-coupled ultrasonic waves of 1 MHz using a piezoceramic transducer fitted with the intermediate layer was demonstrated with a pulse–echo system, and the sensitivity was improved by 20 dB by using the optimal composite material.
- 2007-07-30
著者
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Imano Kazuhiko
Department Of Electrical & Electronic Engineering Mining College Akita University
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Nishihira Morimasa
Department Of Electrical And Electronic Engineering Faculty Of Engineering And Resource Science Akit
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Saito Kazuki
Department Of Chemistry School Of Science Tokai University
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Nishihira Morimasa
Department of Electrical and Electronic Engineering, Faculty of Engineering and Resource Science, Akita University, Akita 010-8502, Japan
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Saito Kazuki
Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Tokyo
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