Misc - MURATA Yorinobu

デジタルホログラフィを用いたヘッド分離型小型ひずみ分布計測装置における位相シフト機構の提案

藤垣元治,村田頼信,南野宏紀,生駒昇 （Part： Last author )

応力・ひずみ測定部門講演会 ( 日本非破壊検査協会 )    13 - 14   2013  [Refereed]

3D Shape Measurement Using High-speed Camera by Light Source Stepping Method with Linear LED Device

OURA Yohei, FUJIGAKI Motoharu, MURATA Yorinobu

ITE Technical Report ( The Institute of Image Information and Television Engineers )  36 ( 43 ) 17 - 20   2012.10

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Equipment for 3D shape measurement with compact size and fast measurement speed are required in wide industrial fields. We proposed shape measurement by a light source stepping method (LSSM) to realize these requirements. This method performs phase-shifting with switching the light source position. The equipment using this method consists only light sources and a grating glass. It is possible to measure the shape so fast and make the device compact using this method. In this paper, we use high-speed camera We conducted 3times phase-shift so the result is 3D image of 4kHz. And we check the accuracy of the results and measure the moving object.

Development of Sampling Moire Camera for Phase Analysis and Application to Real-time 3D Shape Measurement

FUJIGAKI Motoharu, SHIOKAWA Takayuki, HARA Takuya, ASAI Daisuke, MURATA Yorinobu

ITE Technical Report ( The Institute of Image Information and Television Engineers )  36 ( 43 ) 21 - 24   2012.10

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A sampling moire camera was developed to measure two dimensional displacement of a structure in real-time by authors. Two-dimensional phase analysis can be performed from a single shot two-dimensional grating image using the camera. In this paper, the sampling moire camera is applied to a real-time 3D shape measurement. A phase-height table is produced at each pixel using a whole-space tabulation method. In this case, table is composed of several short-range tables and a wide range table. A real-time shape measurement system is developed using this method.

Application of Sampling Moire Camera to Dynamic Displacement Measurement of Railway Bridge while Train Passing

FUJIGAKI Motoharu, HARA Takuya, IKOMA Noboru, MURATA Yorinobu

実験力学 : journal of JSEM ( 日本実験力学会 )  12 ( 3 ) 179 - 184   2012.09

Fringe Pitch Adjustment Method for Shape Measurement Using LSSM

Y. Oura, M. Fujigaki and Y. Murata （Part： Last author )

SEM XII International Congress & Exposition on Experimental and Applied Mechanics ( SEM )    2012.06  [Refereed]

Development of Accurate Shape Measurement System with Several Cameras and Mirrors Using Whole-space Tabulation Method

M. Fujigaki, Y. Morimoto, A. Masaya, S. Matsumoto and Y. Murata （Part： Last author )

International Conference on Computational & Experimental Engineering and Sciences (ICCES 2012)     2012.04  [Refereed]

Optical Design Method in Light Source Stepping Method for High-speed Shape Measurement

A. Takagi, Y. Oura, J. Li, M. Fujigaki and Y. Murata （Part： Last author )

International Conference on Computational & Experimental Engineering and Sciences (ICCES 2012)     2012.04  [Refereed]

Influence of Reflectance on Measurement Accuracy in Shape Measurement Using Whole-Space Tabulation Method

島 淳, 藤垣 元治, 村田 頼信

日本実験力学会講演論文集 ( 日本実験力学会 )  ( 12 ) 36 - 40   2012

Optical setup for Sub-millimeter Order Displacement Measurement Using Speckle Interferometry with Retroreflective Sheet

田尻 貴大, 藤垣 元治, 村田 頼信

日本実験力学会講演論文集 ( 日本実験力学会 )  ( 12 ) 60 - 64   2012

Dynamic displacement distribution measurement of deforming structure using sampling moire camera

Takuya Hara, Motoharu Fujigaki, Yorinobu Murata （Part： Last author )

Proceedings of SPIE - The International Society for Optical Engineering ( SPIE )  8494   2012  [Refereed]

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A Sampling moire method is one of the convenient phase analysis methods. The accuracy of phase difference analysis is from 1/100 to 1/1000 of the grating pitches. This method is useful to a real-time deformation measurement because the two-dimensional phase analysis can be performed from a single shot two-dimensional grating image. We developed a sampling moire camera which can analyze the two-dimensional displacement images in real-time by using the sampling moire method. The camera is composed of a C-MOS sensor, an FPGA, memory modules and a USB interface. A twodimensional grating image on the object is taken by the CMOS sensor in synchronization with a camera trigger. The algorithm mentioned previous was written into the FPGA. The two-dimensional grating images analyzed from one-shot image by the FPGA and outputted in real-time. It is confirmed that the camera can measure static displacement in high accuracy. However, it is not confirmed that the camera can measure dynamic displacement in high accuracy. In this paper, the accuracy of dynamic displacement measurement by using sampling moire camera is confirmed. And the sampling moire camera was applied to measure dynamic displacement of train bridges while a train is passing. © 2012 SPIE.

DOI

Calibration method using sampling moire method for phase-shifting digital holography with multiple imaging devices

Motoharu Fujigaki, Ryosuke Goto, Yorinobu Murata （Part： Last author )

Proceedings of SPIE - The International Society for Optical Engineering ( SPIE )  8494   2012  [Refereed]

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Phase-shifting digital holography is a convenient method to measure displacement and strain distributions. To simplify the optical setup is required for producing more compact equipment. In this paper, a calibration method using a sampling moire method for phase-shifting digital holography with multiple imaging devices is proposed. It is, however, difficult to find the corresponding points on the each reconstructed images taken by each imaging sensors. A 2-D grating reference plate is used. The two-dimensional (2-D) phase map of the 2-D grating pattern can be analyzed accurately. The principle and the experimental results to apply to the deformation measurement are shown. © 2012 SPIE.

DOI

3Pb2-7 Study on Directionality Control by M-sequence Encoding Ultrasonic Transducer(Poster Session)

Yonenaka Hiroshi, Murata Yorinobu

Proceedings of Symposium on Ultrasonic Electronics ( Steering committee of symposium on ultrasonic electronics )  32   479 - 480   2011.11

1Pb-12 Study on Pulse Compression Ultrasonic Transducer Made with Piezoelectric Copolymer Films(Poster Session)

Yonenaka Hiroshi, Murata Yorinobu

Proceedings of Symposium on Ultrasonic Electronics ( Steering committee of symposium on ultrasonic electronics )  31   165 - 166   2010.12

1P1-C15 Development of Micro Robot Used in Liquid

SADAMORI Shingo, MIWA Masafumi, MURATA Yorinobu, TSUCHITANI Shigeki, KOSIMOTO Yasuhiro

ロボティクス・メカトロニクス講演会講演概要集 ( The Japan Society of Mechanical Engineers )  2006   "1P1 - C15(1)"-"1P1-C15(3)"   2006

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In this study, we present a new wireless driving and energy supplying method for micro robot system using external magnetic field. This study divides three parts. The first part is development of energy supply and signal transmission system which uses electromagnetic induction. Also applying magnetic field system to occur electro motive force was developed. The second part is development of propulsion system using IPMC flagellum. In the third part, a macro model robot system was assembled using stereo lithography technique, and it was tested. As a result, IPMC flagellum wireless drive by external magnetic field was succeeded.

Evaluation for the rolling fatigue in deep groove ball bearings using a new focusing ultrasonic transducer made of piezoelectric copolymer

The Third US-Japan Symposium on Advancing Applications and Capabilities in NDE   pp.259-265   2005

Evaluation for the rolling fatigue in deep groove ball bearings using a new focusing ultrasonic transducer made of piezoelectric copolymer

Y. Murata, H. Toda, M. Kiji, N. Oguma

The Third US-Japan Symposium on Advancing Applications and Capabilities in NDE     259 - 265   2005

視覚障害者のための超音波および光計測による障害物検知手法の提案 (第8回知能メカトロニクスワークショップ講演論文集) -- (S6. 屋外・非整備環境における画像応用)

渋田 実, 藤垣 元治, 村田 頼信

知能メカトロニクスワークショップ講演論文集 ( 〔精密工学会〕 )  8   137 - 140   2003.08

Residual Stress Measurement with Acoustoelasticity Using a New-type Grazing SH-wave Transducer

Murata Yorinobu, Toda Hiroki, Nakatani Fumiya, Umemoto Takayuki, Go Yoshihiro

Proc. of the International Conference on Advanced Technology in Experimental Mechanics 2003 ( The Japan Society of Mechanical Engineers )  CD-ROM publication   365 - 365   2003

Residual Stress Measurement with Acoustoelasticity Using a New-Type Grazing SH-Wave Transducer

MURATA Y.

Proc. of ATEM' 03, JSME-MMD   CD-ROM publication   2003

Residual Stress Measurement of Rolled Steel Plate by Acoustoelasticity

Proc. of the 11th Asia-Pacific Conference on Nondestructive Testing     2003