Misc - MURATA Yorinobu

Proposal for Method to Inform Obstacle Position by Tactile

SHIBUTA Minoru, FUJIGAKI Motoharu, MURATA Yorinobu, MIWA Masafumi, MORIMOTO Yoshiharu

The JSME Symposium on Welfare Engineering ( The Japan Society of Mechanical Engineers )  2002 ( 2 ) 307 - 309   2002.11

Estimation of water-cement ratio in fresh concrete using ultrasonic wave

SUMIKAWA Kenta, TODA Hiroki, MURATA Yorinobu, FUTAGAMI Kengo

日本実験力学会研究発表講演会講演論文集   2   248 - 249   2002.08

Stress measurement with a high accuracy by Grazing SH-wave acoustoelasticity

NAKATANI Fumiya, TODA Hiroki, MURATA Yorinobu, UMEMOTO Takayuki

日本実験力学会研究発表講演会講演論文集   2   92 - 93   2002.08

A non-destructive testing for the integrity of EF joint of PE gas pipe with an ultrasonic transducer made of laminated piezoelectric copolymer films

MURATA Yorinobu, OGATA Toshiaki, TODA Hiroki

M&Mレイクサイドサマーシンポジウム講演論文集 ( 日本機械学会 )  2002   93 - 96   2002

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We have developed a wide-band ultrasonic transducer using a piezoelectric copolymer P (VDF-TrFE) in order to test the integrity of PE gas pipes with high resolution and sensitivity. Ultrasonic transducers with lower frequency characteristics are needed to test plastic material such as PE, which is easy to attenuate ultrasonic wave. Then, we tried to control the frequency characteristics of the transducers by laminating a few thin piezoelectric copolymer films. The performance of the transducers was evaluated by measuring the resonant characteristic of the transducers in frequency and detecting reflected wave from object in water and in PE. It has been found that in laminated ultrasonic transducers the thickness of electrode layers and adhesive layers affected to the frequency response of the transducers strongly. The developed transducer detected a small defect in PE gas pipes with big amplitude and a little ringing.

Development of a Wide-Band Ultrasonic Transducer with Low Frequency Characterictic Using Laminated Piezoelectric Copolymer

Y.Murata, T.Ogata, H.Toda

Proc. of the 6th Far East Conference on Non-Destructive Testing     135 - 140   2002

Non-Destructive Evaluation of the Integrity of Electrofusion Joint in PE Gas Pipes Using a Tocused Ultrasonic Transducer

Proc. of the 6th Far East Conference on Non-Destructive Testing   517-522   2002

Development of a Wide-Band Ultrasonic Transducer with Low Frequency Characterictic Using Laminated Piezoelectric Copolymer

Proc. of the 6th Far East Conference on Non-Destructive Testing   135-140   2002

Non-Destructive Evaluation of the Integrity of Electrofusion Joint in PE Gas Pipes Using a Tocused Ultrasonic Transducer

H.Toda, Y.Murata, K.Nakajima

Proc. of the 6th Far East Conference on Non-Destructive Testing     517 - 522   2002

Fabrication of Broad band Ultrasonic Transducer with multi-layered Piezoelectric Porymer Film

尾形 俊明, 高野宮 昌典, 村田 頼信, 戸田 裕己

大会講演概要集   2001 ( 2 ) 51 - 52   2001.10

Quantitative Evaluation of Fating Cracks in Wheel Set Axle for Railway Using a Wave Forming Technique

谷本 晃久, 戸田 裕己, 村田 頼信

大会講演概要集   2001 ( 2 ) 47 - 48   2001.10

Fabrication and Evaluation of Porymer Concave Ultrasonic Transducer for PE-gas Pipes Inspection

高野宮 昌典, 尾形 俊明, 村田 頼信, 戸田 裕己

大会講演概要集   2001 ( 1 ) 5 - 6   2001.05

Development of Electrofusion Interface Ultrasonic Inspection Technique, Contributing to Construction of Highly Reliable PE Piping

T. Kitaoka, H. Toda, Y. Murata, J. Furukawa, Development of Electrofusion Interface Ultrasonic, Inspection Technique, Contributing to Construction of Highly Reliable PE Piping

Proc. of 2001 Int. Gas Research Conf.   CD-ROM pulication   2001

Development of Electrofusion Interface Ultrasonic Inspection Technique, Contributing to Construction of Highly Reliable PE Piping

Proc. of 2001 Int. Gas Research Conf.   CD-ROM publication   2001

和歌山大学システム工学部光メカトロニクス学科波動エレクトロニクス研究グループ

戸田 裕己, 村田 頼信

非破壊検査   49 ( 12 ) 868 - 868   2000.12

Quantitative Evaluation of Fatigue Cracks in Wheel Set Axle for Railway Using a Wave Forming Technique(Part2)

TANIMOTO A., HATIYA M., TODA H., MURATA Y., YOHSO J., ISHIZUKA H.

大会講演概要集 ( 日本非破壊検査協会 )  2000 ( 2 ) 213 - 214   2000.11

超音波計測における信号処理

村田頼信

和歌山大学システム情報学センター広報   vol.4   61 - 68   2000

Detection of Fatigue Cracks in Wheel Set Axle for Railway Using a Wave Forming Technique

村田 頼信, 戸田 裕己, 養祖 次郎, 石塚 弘道

大会講演概要集   1999 ( 1 ) 189 - 190   1999.05

Detection of fatigue cracks in wheel set axle using ultrasonic grazing SH-waves shortened by deconvolution method

Proc. of the second Japan-US symposium on advances in NDT   pp.94-98   1999

Detection of fatigue cracks in wheel set axle using ultrasonic grazing SH-waves shortened by deconvolution method

Y. Murata, H. Toda, Detection of, fatigue, cracks in wheel set, axle using, ultrasonic grazing, SH-waves shortened by deconvolution method

Proc. of the second Japan-US symposium on advances in NDT     94 - 98   1999

Acoustoelasticity measurement of axial stresses in long rail

H. Toda, Y. Murata

Proc. 2nd Jpn. -US Symp. Advances in NDT   pp.7-11   7 - 11   1999