T. Yamada, Y. Ohara, T. J. Ulrich, M. C. Remillieux “High-Resolution 3D Ultrasonic Imaging Using High-Frequency Piezoelectric Transmitter and Ultra-Multiple Laser 2D Scanning” NDT&E International, 146 (2024) 103178-1-7. https://doi.org/10.1016/j.ndteint.2024.103178
2022年度
Y. Ohara, T. J. Ulrich, M. C. Remillieux, K. Tsunoda, T. Yamada, T. Tsuji, T. Mihara “Multi-Mode 3D Ultrasonic Phased Array Imaging Method Using Piezoelectric and Laser Ultrasonic System (PLUS)” Japanese Journal of Applied Physics, 62 (2023) SJ1019-1-9. https://doi.org/10.35848/1347-4065/acb5fd
S. Takeda, Y. Ohara, T. Uchimoto, H. Enoki, T. Iijima, E. Tokuda, T. Yamada, Y. Nagatomo “Characterization of Fatigue Crack of Hydrogen-Charged Austenitic Stainless Steel by Electromagnetic and Ultrasonic Techniques” International Journal of Hydrogen Energy, 47-51 (2022) 32223-32234. https://doi.org/10.1016/j.ijhydene.2022.07.105
Y. Ohara, M. C. Remillieux, T. J. Ulrich, S. Ozawa, K. Tsunoda, T. Tsuji, T. Mihara “Exploring 3D Elastic-Wave Scattering at Interfaces Using High-Resolution Phased-Array System” Scientific Reports, 12 (2022) 8291-1-11. https://doi.org/10.1038/s41598-022-12104-9 プレスリリース東北大学、大学院工学研究科、科学技術振興機構 JST
Y. Ohara, M. C. Remillieux, T. J. Ulrich, S. Ozawa, K. Tsunoda, T. Tsuji, T. Mihara “High-Resolution 3D Phased-Array Imaging of Fatigue Cracks Using Piezoelectric and Laser Ultrasonic System (PLUS)” Japanese Journal of Applied Physics, 61 (2022) SG1044-1-10. https://doi.org/10.35848/1347-4065/ac48cd Best Paper Award受賞 News, USE website
Y. Oyabu, Y. Ohara, T. Tsuji, T. Mihara “Dark-Field Ultrasonic Imaging Method Using Mode-Converted Longitudinal Evanescent Field” Japanese Journal of Applied Physics, 61 (2022) SG1042-1-7. https://doi.org/10.35848/1347-4065/ac4add
2021年度
Y. Ohara, S. Haupert, S. Li “Ultrafast Phased-Array Imaging with Pump Excitation for Closed-Crack Imaging” Applied Physics Express, 14 (2021) 126505-1-5. https://doi.org/10.35848/1882-0786/ac3d1e
Y. Ohara, T. Oshiumi, X. Wu, T. Uchimoto, T. Takagi, T. Tsuji, T. Mihara “High-Selectivity Imaging of Environmental Closed Fatigue Crack Using Surface-Acoustic-Wave Phased Array (SAW PA)” Ultrasonics, 119 (2021) 106629-1-8. https://doi.org/10.1016/j.ultras.2021.106629 プレスリリース東北大学、大学院工学研究科
Y. Ohara, K. Kikuchi, T. Tsuji, T. Mihara “Development of Low-Frequency Phased Array for Imaging Defects in Concrete Structures” Sensors, 21 (2021) 7012-1-15. https://doi.org/10.3390/s21217012
Y. Ohara, T. Umezaki, E. Carcreff, S. Haupert, T. Tsuji, T. Mihara “Experimental Analysis of Linear and Nonlinear Ultrasonic Scatterings at Closed Fatigue Crack Using Fixed-Voltage Fundamental Wave Amplitude Difference with Radarlike Display” Japanese Journal of Applied Physics, 60, (2021) SDDB01-1-8. https://doi.org/10.35848/1347-4065/abe2e7
Y. Ohara, H. Nakajima, S. Haupert, T. Tsuji, T. Mihara “Imaging of Three-Dimensional Crack Open/Closed Distribution by Nonlinear Ultrasonic Phased Array Based on Fundamental Wave Amplitude Difference” Japanese Journal of Applied Physics, 59 (2020) SKKB01-1-9. https://doi.org/10.35848/1347-4065/ab79ea
2019年度
M. Remillieux, D. Kaoumi, Y. Ohara, M. S. Geesey, L. Xi, R. Schoell, C. Bryan, D. Enos, D. Summa, T. J. Ulrich, B. Anderson, Z. Shayer “Detecting and Imaging Stress Corrosion Cracking in Stainless Steel, with Application to Inspecting Storage Canisters for Spent Nuclear Fuel” NDT&E International, 109 (2020) 102180-1-17. https://doi.org/10.1016/j.ndteint.2019.102180
Y. Ohara, H. Nakajima, T. Tsuji, T. Mihara “Nonlinear Surface-Acoustic-Wave Phased Array with Fixed-Voltage Fundamental Wave Amplitude Difference for Imaging Closed Cracks” NDT&E International, 108 (2019) 102170-1-10. https://doi.org/10.1016/j.ndteint.2019.102170
Y. Ohara, H. Nakajima, S. Haupert, T. Tsuji, T. Mihara “Nonlinear Ultrasonic Phased Array with Fixed-Voltage Fundamental Wave Amplitude Difference for High-Selectivity Imaging of Closed Cracks” The Journal of the Acoustical Society of America, 146-1 (2019) 266-277. https://doi.org/10.1121/1.5116017
Y. Ohara, J. Potter, H. Nakajima, T. Tsuji, T. Mihara “Multi-Mode Nonlinear Ultrasonic Phased Array for Imaging Closed Cracks” Japanese Journal of Applied Physics, 58 (2019) SGGB06-1-7. https://doi.org/10.7567/1347-4065/ab0adc
S. Haupert, Y. Ohara, E. Carcreff, G. Renaud “Fundamental Wave Amplitude Differene Imaging for Detection and Characterization of Embedded Cracks” Ultrasonics, 96 (2019) 132-139. https://doi.org/10.1016/j.ultras.2019.02.003
[Editors] K.-Y. Jhang, C. Lissenden, I. Solodov, Y. Ohara, V. Gusev “Measurement of Nonlinear Ultrasonic Characteristics” (Springer, 2020) (Springer, Amazon)
[Chap. 5 (pp. 165-234)] Y. Ohara, T. Mihara, K. Yamanaka “Nonlinear Ultrasonic Phased Array for Measurement of Closed-Crack Depth” (第5章では、近年、発展が目覚ましい閉じた欠陥の映像法「非線形超音波フェーズドアレイ」の歴史から最新技術までその全体像だけでなく、各手法の基本原理、特徴、利点・欠点、使い分け方、適用先、さらには正しい計測を行うための注意事項に至るまで概説しています。)
[Editor] T. Kundu “Nonlinear Ultrasonic and Vibro-Acoustical Techniques for Nondestructive Evaluation” (Springer, 2018) (Springer, e-book(Full), e-book(Chapt. 10))
[Chap. 10 (pp. 419-469)] Y. Ohara, T. Mihara, K. Yamanaka “Subharmonic phased array for crack evaluation (SPACE)” (第10章では、非線形超音波フェーズドアレイの1つであるSPACEについて、過去の論文掲載された内容だけでなく、新データも含む形で系統的に網羅しています。)
Y. Ohara, M. C. Remillieux, T. J. Ulrich, S. Ozawa, K. Tsunoda, T. Tsuji, T. Mihara 超音波エレクトロニクスの基礎と応用に関するシンポジウムUSE2021 論文賞(賞状、授賞式1、授賞式2) (Best Paper Award of Symposium on Ultrasonic Electronics (USE2021)) 「High-resolution 3D phased-array imaging of fatigue cracks using piezoelectric and laser ultrasonic system (PLUS)」 Japanese Journal of Applied Physics, 61 (2022) SG1044-1-10. https://www.use-jp.org/USE2022/en/award/index.html
T. Yamada, T. J. Ulrich, M. C. Remillieux, Y. Ohara “Utilization of Multiple Modes in High-Frequency 3D Ultrasonic Phased Array Imaging Method (PLUS)” Proceedings of Symposium on Ultrasonic Electronics, 44 (2023) 3P2-16.
T. Yoshikawa, K. Jinno, T. Ikemura, Y. Ohara “Defect Identification by Load-Dependence Nonlinear Ultrasonic Phased Array” Proceedings of Symposium on Ultrasonic Electronics, 44 (2023) 3P2-17.
Y. Fujikawa, T. J. Ulrich, M. C. Remillieux, Y. Ohara “Low-Frequency 3D Ultrasonic Phased Array Imaging Method Using Ultra-Multiple Laser Scanning for Concrete Inspection” Proceedings of Symposium on Ultrasonic Electronics, 44 (2023) 3J1-3.
2022年度
Y. Ohara, T. J. Ulrich, M. C. Remillieux, K. Tsunoda, T. Yamada, T. Tsuji, T. Mihara “Multi-Mode 3D Ultrasonic Phased Array Imaging Method Using Piezoelectric and Laser Ultrasonic System (PLUS)” Proceedings of Symposium on Ultrasonic Electronics, 43 (2022) 2Pb2-4.
M. Endo, K. Isshikida, T. Yamada, I. Aizawa, T. Tsuji, Y. Ohara, T. Mihara “Fundamental Study on 2D Array Transducer for High-Sensitivity 3D Imaging of Creep Damage” Proceedings of Symposium on Ultrasonic Electronics, 43 (2022) 2Pa2-6.
T. Yamada, Y. Ohara, T. J. Ulrich, M. C. Remillieux, T. Tsuji, T. Mihara “3D Ultrasonic Imaging of Small Defects Using High-Frequency Piezoelectric Transmitter and Ultra-Multiple Laser 2D Scanning” Proceedings of Symposium on Ultrasonic Electronics, 43 (2022) 3Pb2-2.
T. Tsuji, H. Fukushi, T. Oizumi, N. Takeda, T. Iwaya, S. Akao, Y. Tsukahara, K. Yamanaka, Y. Ohara, T. Mihara “Fundamental Study of Nondestructive Testing of Inner Surface of Stainless-Steel Tubings by Ball SAW Trace Moisture Sensor” Proceedings of Symposium on Ultrasonic Electronics, 43 (2022) 3J1-2.
2021年度
Y. Ohara, M. C. Remillieux, T. J. Ulrich, S. Ozawa, K. Tsunoda, T. Tsuji, T. Mihara “3D Ultrasonic Phased-Array Imaging of Fatigue Cracks Using a Piezoelectric and Laser System (PLUS)” Proceedings of Symposium on Ultrasonic Electronics, 42 (2021) 2Pb2-6.
T. Tsuji, H. Fukushi, T. Oizumi, N. Takeda, T. Iwaya, S. Akao, Y. Tsukahara, K. Yamanaka, Y. Ohara, T. Mihara “Shortening Interval of Burst Waveform Undersampling Measurement of Ball SAW Sensor for Characterizing Metal Surface Morphology” Proceedings of Symposium on Ultrasonic Electronics, 42 (2021) 3J2-3.
Y. Oyabu, Y. Ohara, T. Tsuji, T. Mihara “Proposal of Shear-Wave-Excited Evanescent Super-Resolution Imaging Method for the Detection of Micro Defects and Its Fundamental Study” Proceedings of Symposium on Ultrasonic Electronics, 42 (2021) 1Pa2-7.
H. Kumagai, T. Tsuji, Y. Ohara, T. Mihara “Fundamental Study of 2-2 Ceramic-Air Composite Transducers for Air-Coupled Ultrasonic Measurement” Proceedings of Symposium on Ultrasonic Electronics, 42 (2021) 1Pb3-3.
2020年度
Y. Ohara, T. Umezaki, E. Carcreff, S. Haupert, T. Tsuji, T. Mihara “Experimental Analysis of Linear and Nonlinear Ultrasonic Responses at Fatigue Cracks Using Fundamental Wave Amplitude Difference” Proceedings of Symposium on Ultrasonic Electronics, 41 (2020) 2Pa2-1-2
T. Umezaki, M. Ishibashi, T. Tsuji, Y. Ohara “Study on the Characteristics of Aluminum-Alloy Fatigue Cracks and the Behavior of Subharmonic Generation” Proceedings of Symposium on Ultrasonic Electronics, 41 (2020) 1Pb2-4-1-2.
M. Ishibashi, T. Umezaki, T. Tsuji, Y. Ohara, T. Mihara “Development of Large-Displacement Laminated Transducer and Its Application to SPACE” Proceedings of Symposium on Ultrasonic Electronics, 41 (2020) 1Pb2-5-1-2.
H. Ohshida, H. Kumagai, T. Tsuji, Y. Ohara, T. Mihara Development of 1-3 Ceramic-Air Composite Transduers for Air-Coupled Ultrasonic Measurement Proceedings of Symposium on Ultrasonic Electronics, 41 (2020) 3J3-2-1-2.
2019年度
Y. Ohara, H. Nakajima, S. Haupert, T. Tsuji, T. Mihara “Imaging of Three-Dimensional Crack Open/Closed Distribution by Nonlinear Ultrasonic Phased Array Based on Fundamental Wave Amplitude Difference” Proceedings of Symposium on Ultrasonic Electronics, 40 (2019) 2P2-10-1-2.
S. Abe, T. Tsuji, Y. Ohara, T. Mihara “Development of Laminated Lithium Niobate Transducer Available at 500 °C” Proceedings of Symposium on Ultrasonic Electronics, 40 (2019) 1P2-2-1-2.
T. Suzuki, T. Tsuji, Y. Ohara, T. Mihara “Development of Couplant-Free Point-Contact Ultrasonic Probe for Concrete Measurement” Proceedings of Symposium on Ultrasonic Electronics, 40 (2019) 1P2-3-1-2.
E. Carcreff, D. Braconnier, Y. Ohara, S. Haupert, G. Renaud “Nonlinear Imaging of Closed Cracks by a Fundamental Wave Amplitude Difference Approach” Review of Progress in Quantitative Nondestructive Evaluation (QNDE2019), 46 (2019) 1234-1-3.
石塚由晃、小原良和、Sinan Li “大変位低周波加振と超高速フェーズドアレイによる閉じたき裂の映像化” 日本非破壊検査協会 秋季講演大会@ハーネル仙台(宮城)
Yoshikazu Ohara, Takumi Yamada, Yuto Fujikawa, T. J. Ulrich, Sinan Li “High-frequency 3D ultrasonic phased-array imaging based on piezoelectric transmitter and ultra-multiple laser scan” IEEE UFFC-JS 2024@Taipei Nangan Echibition Center, Taipei, Taiwan
Yoshikazu Ohara Invited Talk (flyer) “Frontiers of ultrasonic phased array for accurate crack imaging” Seminar at Texas A&M University@College Station, Texas, USA
Yoshikazu Ohara Invited Talk “Frontiers of ultrasonic phased array for accurate crack imaging” Seminar at Los Alamos National Laboratory@Los Alamos, Nex Mexico, USA
Yuto Fujikawa, T. J. Ulrich, Marcel C. Remillieux, Yoshikazu Ohara “Low-frequency 3D ultrasonic phased array imaging method using ultra-multiple laser scanning for concrete inspection” France-Japan NDT Workshop@Sendai, Japan
Yoshikazu Ohara “Brief Introduction of Research Activity in Ohara Lab.” France-Japan NDT Workshop@Sendai, Japan
Yoshikazu Ohara, Sinan Li, Takumi Yamada, Yuto Fujikawa, Marcel C. Remillieux, T. J. Ulrich “High-Resolution 3D Phased-Array Imaging Using 1024-Element 2D Matrix Array Transducers” 20th World Conference on Nondestructive Testing (WCNDT)@Incheon, Sourth Korea
Yoshikazu Ohara, Sinan Li, Toshiki Yoshikawa, Yoshiaki Ishizuka, Sylvain Haupert, Ewen Carcreff “Nonlinear Ultrasonic Phased Array for Closed Cracks” 20th World Conference on Nondestructive Testing (WCNDT)@Incheon, Sourth Korea
Yoshikazu Ohara Invited Talk “Recent Progress on Ultrasonic Phased Array Imaging for Accurate Measurement of Cracks” International Workshop: Structural Integrity Challenges of Energy Infrastructure@TOKYO ELECTRON House of Creativity, Katahira Campus, Tohoku University
藤川裕翔、T. J. Ulirch, M. C. Remillieux, 小原良和(新進賞受賞) “高減衰材検査のための低周波3D超音波フェーズドアレイ映像法PLUSの高速化に向けた基礎検討” 日本非破壊検査協会 第31回超音波による非破壊評価シンポジウム@東京都立産業技術研究センター 青海本部
Takumi Yamada, T. J. Ulrich, Marcel C. Remillieux, Yoshikazu Ohara “Utilization of Multiple Modes in High-Frequency 3D Ultrasonic Phased Array Imaging Method (PLUS)” The 44th Symposium on UltraSonic Electronics (USE2023)@Toyama, Japan
Toshiki Yoshikawa, Kentaro Jinno, Taisei Ikemura, Yoshikazu Ohara “Defect Identification by Load-Dependence Nonlinear Ultrasonic Phased Array” The 44th Symposium on UltraSonic Electronics (USE2023)@Toyama, Japan
Yuto Fujikawa, T. J. Ulrich, Marcel C. Remillieux, Yoshikazu Ohara “Low-Frequency 3D Ultrasonic Phased Array Imaging Method Using Ultra-Multiple Laser Scanning for Concrete Inspection” The 44th Symposium on UltraSonic Electronics (USE2023)@Toyama, Japan
Yoshikazu Ohara, Takumi Yamada, Yuto Fujikawa, Sinan Li, T. J. Ulrich, Marcel Remilleux “3D Ultrasonic Phased-Array Imaging for Various NDE Applications” 2023 International Congress on Ultrasonics (ICU)@Beijing, China
Yoshikazu Ohara, Sinan Li, Takumi Yamada, T. J. Ulrich, Marcel C. Remillieux, Toshihiro Tsuji, Tsuyoshi Mihara “Development of 1024-element 2D matrix array transducer for high-resolution 3D phased-array imaging in NDE Applications” 13th European Conference on Non-Destructive Testing (13th ECNDT)@Lisbon, Portugal
Y. Ohara, T. J. Ulrich, M. C. Remillieux, K. Tsunoda, T. Yamada, T. Tsuji, T. Mihara “Multi-Mode 3D Ultrasonic Phased Array Imaging Method Using Piezoelectric and Laser Ultrasonic System (PLUS)” The 43rd Symposium on UltraSonic Electronics (USE2022)@Kyoto, Japan
M. Endo, K. Isshikida, T. Yamada, I. Aizawa, T. Tsuji, Y. Ohara, T. Mihara “Fundamental Study on 2D Array Transducer for High-Sensitivity 3D Imaging of Creep Damage” The 43rd Symposium on UltraSonic Electronics (USE2022)@Kyoto, Japan
T. Yamada, Y. Ohara, T. J. Ulrich, M. C. Remillieux, T. Tsuji, T. Mihara “3D Ultrasonic Imaging of Small Defects Using High-Frequency Piezoelectric Transmitter and Ultra-Multiple Laser 2D Scanning” The 43rd Symposium on UltraSonic Electronics (USE2022)@Kyoto, Japan
T. Tsuji, H. Fukushi, T. Oizumi, N. Takeda, T. Iwaya, S. Akao, Y. Tsukahara, K. Yamanaka, Y. Ohara, T. Mihara “Fundamental Study of Nondestructive Testing of Inner Surface of Stainless-Steel Tubings by Ball SAW Trace Moisture Sensor” The 43rd Symposium on UltraSonic Electronics (USE2022)@Kyoto, Japan
S. Dos Santos, Y. Ohara “Signal and Image Processing 4.0 for Nonlinear NDT” (Presentation slides@ResearchGate) General Assembly of Academia NDT International@Budapest, Hungary (hybrid)
Y. Ohara, T. Yamada, S. Li, M. Remillieux, T. J. Ulrich, T. Tsuji, T. Mihara “Development of 1024-Element 2D Matrix Array Transducer Based on Numerical Simulation and Experimental Scattering Analyses for NDE Applications” 2022 IEEE International Ultrasonics Symposium (2022 IEEE IUS)@Venice, Italy
Y. Ohara, T. Yamada, Y. Kobayashi, M. Remillieux, T. J. Ulrich, T. Tsuji, T. Mihara “High-Resolution 3D Ultrasonic Phased-Array Imaging Using Piezoelectric and Laser Ultrasonic System (PLUS) for Nondestructive Evaluation” 2022 IEEE International Ultrasonics Symposium (2022 IEEE IUS)@Venice, Italy
小原良和、S. Haupert, S. Li “閉じたき裂評価のためのポンプ励起を用いた超高速フェーズドアレイ映像法” 非線形音響研究会@加藤山崎教育基金 軽井沢研修所
Y. Ohara, S. Li, S. Haupert, E. Carcreff, T. Yamada, T. Tsuji, T. Mihara “Nonlinear Ultrasonic Phased Array for Closed-Crack Imaging” 22nd International Symposium on Nonlinear Acoustics (22nd ISNA)@University of Oxford, Oxford, UK
Y. Ohara, M. C. Remillieux, T. J. Ulrich, S. Ozawa, K. Tsunoda, T. Tsuji, T. Mihara “3D Ultrasonic Phased-Array Imaging of Fatigue Cracks Using a Piezoelectric and Laser System (PLUS)” The 42nd Symposium on UltraSonic Electronics (USE2021), Online conference.
T. Tsuji, H. Fukushi, T. Oizumi, N. Takeda, T. Iwaya, S. Akao, Y. Tsukahara, K. Yamanaka, Y. Ohara, T. Mihara “Shortening Interval of Burst Waveform Undersampling Measurement of Ball SAW Sensor for Characterizing Metal Surface Morphology” The 42nd Symposium on UltraSonic Electronics (USE2021), Online conference.
Y. Oyabu, Y. Ohara, T. Tsuji, T. Mihara “Proposal of Shear-Wave-Excited Evanescent Super-Resolution Imaging Method for the Detection of Micro Defects and Its Fundamental Study” The 42nd Symposium on UltraSonic Electronics (USE2021), Online conference.
H. Kumagai, T. Tsuji, Y. Ohara, T. Mihara “Fundamental Study of 2-2 Ceramic-Air Composite Transducers for Air-Coupled Ultrasonic Measurement” The 42nd Symposium on UltraSonic Electronics (USE2021), Online conference.
Y. Ohara “Nonlinear Ultrasonic Phased Array for Imaging Closed Cracks” General Assembly of Academia NDT International (online) Invited
Y. Ohara, T. Umezaki, E. Carcreff, S. Haupert, T. Tsuji, T. Mihara “Experimental Analysis of Linear and Nonlinear Ultrasonic Responses at Fatigue Cracks Using Fundamental Wave Amplitude Difference” The 41st Symposium on UltraSonic Electronics (USE2020), Online conference.
M. Ishibashi, T. Umezaki, T. Tsuji, Y. Ohara, T. Mihara “Development of Large-Displacement Laminated Transducer and Its Application to SPACE” The 41st Symposium on UltraSonic Electronics (USE2020), Online conference.
T. Umezaki, M. Ishibashi, T. Tsuji, Y. Ohara “Study on the Characteritics of Aluminum-Alloy Fatigue Cracks and the Behavior of Subharonic Generation” The 41st Symposium on UltraSonic Electronics (USE2020), Online conference.
H. Ohshida, H. Kumagai, T. Tsuji, Y. Ohara, T. Mihara “Development of 1-3 Ceramic-Air Composite Transduers for Air-Coupled Ultrasonic Measurement” The 41st Symposium on UltraSonic Electronics (USE2020), Online conference.