論文 - 村田　頼信

表面SH波音弾性法における表面異方性を用いた無応力時の伝搬速度推定による主応力測定

武本航樹, 新宮朋史, 村田頼信 (担当区分： 責任著者 )

電気学会論文誌C   144 ( 9 ) 875 - 879   2024年09月  [査読有り]

セルフセンシング形フレキシブルアレイ探触子における自己形状計測精度の向上

吉川康太, 村田頼信 (担当区分： 責任著者 )

電気学会論文誌C ( 日本電気学会 )  143 ( 9 ) 854 - 861   2023年09月  [査読有り]

表面SH波音弾性法のための非対称性な見かけの弾性定数を考慮したFDTD法に関する研究

新宮朋史, 村田頼信 (担当区分： 最終著者 )

非破壊検査 ( 日本非破壊検査協会 )  72 ( 6 ) 236 - 241   2023年06月  [査読有り]

Ｍ系列符号化アレイ探触子による管内気泡の可視化に関する研究

山本将一朗, 山本一貴, 村田頼信 (担当区分： 責任著者 )

電気学会論文誌 C   142 ( 12 ) 948 - 955   2022年12月  [査読有り]

超音波探傷におけるスパースモデリングを用いた 隣接欠陥の検出

福本慎一郎, 村田 頼信 (担当区分： 最終著者 )

電気学会論文誌 C   141 ( 9 ) 948 - 955   2021年09月  [査読有り]

空中超音波を用いた衣服着用状態における前腕の非接触二次元形状計測

屋木悠佑,村田頼信 (担当区分： 責任著者 )

電気学会論文誌C   139 ( 11 ) 1310 - 1315   2019年11月  [査読有り]

Study on Pulse Compression Ultrasonic Imaging by a Stacked M-Sequence Encoding Probe

YORINOBU MURATA and DAIYU KANEDA (担当区分： 筆頭著者 )

Electrical Engineering in Japan   207 ( 1 ) 36 - 42   2019年04月  [査読有り]

Reduction of temperature influence in stress measurement using surface SH‐wave acoustoelasticity

Katsuhiko Kitano, Yorinobu Murata (担当区分： 責任著者 )

Electrical Engineering in Japan   206 ( 3 ) 17 - 23   2019年01月  [査読有り]

ラム波の非線形性を利用したシリコンウェーハのマイクロクラック検査に関する基礎的検討

村田頼信,西川美沙都,松田正誉 (担当区分： 筆頭著者 )

電気学会論文誌C   138 ( 12 ) 1566 - 1572   2018年12月  [査読有り]

A Method of Generating Reference Wave in Interferometric Measurement with Multiple Imaging Sensors

Fujigaki, M, Otsuka, N, Murata, Y (担当区分： 最終著者 )

Optics and Lasers in Engineering   110   377 - 383   2018年11月  [査読有り]

DOI

Interferometric Trigger Method with Dual Piezoelectric Transducers for Digital Holographic Interferometry

Fujigaki, M, Minamino, H, Murata, Y (担当区分： 最終著者 )

Optical Engineering   57 ( 11 ) 1114105- - 114105-5   2018年11月  [査読有り]

DOI

表面SH波音弾性法を用いた応力測定における温度影響の低減

北野勝彦,村田頼信 (担当区分： 責任著者 )

電気学会論文誌C   138 ( 9 ) 1082 - 1087   2018年09月  [査読有り]

Talbot干渉格子投影による３次元計測用LEDマルチラインバンドルファイバ光源の試作

坂野琢弥, 林拓実, 藤垣元治, 村田頼信 (担当区分： 最終著者 )

実験力学   18 ( 1 ) 43 - 49   2018年03月  [査読有り]

Ｍ系列符号化積層探触子によるパルス圧縮超音波撮像に関する研究

村田頼信,金田大裕 (担当区分： 筆頭著者 )

電気学会論文誌C ( 一般社団法人 電気学会 )  137 ( 9 ) 1153 - 1158   2017年09月  [査読有り]

　概要を見る

<p>If an ultrasonic imaging inside an object is possible without scanning by using an ultrasonic probe having a small aperture, the ultrasonic imaging system becomes a simpler and easier system. We have developed a stacked encoding ultrasonic transducer which can transceive an M-sequence signal only by a pulse drive in order to realize an ultrasonic measurement with a high resolution and high sensitivity. When an ultrasonic probe with such transducer is used, a pulse compression measurement is enabled only with a general ultrasonic flaw detector and a PC without using special devices. In this study, we focused on the characteristic that the received waveform by this probe changes with transceiver directions of a wave. A stacked M-sequence encoding probe of 7 bits length was manufactured and the one-dimensional point spread function in transceiver angle was obtained. As a result, it was confirmed that this probe has not only the pulse compression characteristic but the angle selecting characteristic. Finally, by using the proposed probe, the cross-sectional imaging for point objects without scanning was demonstrated.</p>

DOI

環状振動子を用いたガイド波流量計測における内部流体の温度が測定に与える影響

松田正誉, 西川美沙都, 村田頼信 (担当区分： 責任著者 )

電気学会論文誌C ( 一般社団法人 電気学会 )  137 ( 9 ) 1159 - 1164   2017年09月  [査読有り]

　概要を見る

<p>Micro flow rate measurements are required for manufacturing and medical fields. Straight type ultrasonic flowmeter can measure the liquid flow by using guided waves. However, guided waves propagate by vibrating intricately along boundaries, so it is difficult to reveal their characteristics. In addition, the time difference between two receiving waves across two transducers differs depending on the temperature of the liquid, which can cause errors in flow rate measurements. In this paper, the theoretical analysis method for guided wave flowmeter is introduced to investigate the influence of water temperature on flow rate measurement. The simulated time difference is calculated by using this method, while the experimental time difference is obtained in a circulation system. By comparing simulated and experimental values, this theoretical analysis can be confirmed to be valid for revealing the temperature dependence.</p>

DOI

ガイド波を用いた流量測定における周波数が測定に与える影響

松田正誉, 西川美沙都, 村田頼信 (担当区分： 責任著者 )

ESI-NEWS   35 ( 1 ) 6 - 11   2017年02月  [査読有り]

Application of phase-shifted fringe projection method with linear fiber arrays using talbot effect to height measurement of BGA

Motoharu Fujigaki, Takumi Hayashi, Yorinobu Murata (担当区分： 最終著者 )

Springer Proceedings in Physics ( Springer Science and Business Media, LLC )  194   41 - 47   2017年  [査読有り]

　概要を見る

Recently, authors were proposed a small pitch fringe projection method using Talbot effect with an SLD (super luminescent diode) with inclining the appearing area of the fringe pattern. The phase of the projected fringe is shifted using a linear fiber array with four cores. In this paper, an application of these methods to height measurement of BGA (ball grid array) is performed.

DOI

Development of a compact 3D shape measurement unit using the light-source-stepping method

Motoharu Fujigaki, Toshimasa Sakaguchi, Yorinobu Murata (担当区分： 最終著者 )

OPTICS AND LASERS IN ENGINEERING ( ELSEVIER SCI LTD )  85   9 - 17   2016年10月  [査読有り]

　概要を見る

A compact 3D shape measurement unit that uses the light-source-stepping method (LSSM) is developed. The LSSM proposed by the authors is a phase-shifting fringe projection method for shape measurement. The authors also developed a linear LED device for high-speed shape measurement using the LSSM. A compact and high-speed 3D shape measurement unit can be realized using a linear LED device. However, the LSSM is difficult to utilize because the phase-shifting amount is not uniform. The phase-shifting amount depends on the distance from the grating plate. It is therefore necessary to consider carefully the locations of the linear LED device and the grating plate. In this paper, the design method for a 3D shape measurement unit that uses the LSSM is shown, and a prototype of a compact 3D shape measurement unit with a linear LED device is developed. (C) 2016 The Authors. Published by Elsevier Ltd.

DOI

スペックル干渉法を用いた超音波ホログラフィ画像撮像システムの構築

山口論人,村田頼信,藤垣元治 (担当区分： 責任著者 )

電気学会論文誌C   136 ( 8 ) 1056 - 1062   2016年08月  [査読有り]

Talbot効果による傾斜角度格子投影手法とリニアファイバアレイを用いた位相シフトによる3次元計測

林拓実, 村田頼信, 藤垣元治 (担当区分： 最終著者 )

電気学会論文誌C   136 ( 8 ) 1063 - 1070   2016年08月  [査読有り]