Search Results 1-20 of 533

  • Study on Measurement for Wide Velocity Dynamic Range Using Wideband Phase Difference Method  [in Japanese]

    荘司 成熙 , 高橋 秀治 , 木倉 宏成

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 119(87), 9-13, 2019-06-17

  • Physical Modeling of Asymmetrical Flow in Slab Continuous Casting Mold due to Submerged Entry Nozzle Clogging with the Effect of Electromagnetic Stirring

    Li Bin , Lu Haibiao , Shen Zhe , Sun Xiaohui , Zhong Yunbo , Ren Zhongming , Lei Zuosheng

    … In order to investigate the impact of the SEN clogging rate on the flow field and the optimization effect of electromagnetic stirring (EMS) on the asymmetrical flow due to the SEN clogging, a 1:5 scaled mercury model, with various SEN clogging rates and different electromagnetic stirring currents was established and the flow velocity was measured by means of Ultrasonic Doppler Velocimetry (UDV). … In this study, EMS is an effective method to increase <i>S</i> …

    ISIJ International 59(12), 2264-2271, 2019

    J-STAGE 

  • Basics of shear wave elastography  [in Japanese]

    TANIGAWA Shunichiro

    … <p>A major feature of medical ultrasonic diagnostic devices is the ability to observe in vivo organs in real time. … By using the color Doppler method, it becomes possible to observe the blood flow on a real-time image. … This article describes the basic ultrasound physics, measurement method, and applications of shear wave elastography.</p> …

    Choonpa Igaku 46(6), 503-512, 2019

    J-STAGE 

  • Measurement reliability of ultrasonic vector flow mapping  [in Japanese]

    TANAKA Tomohiko

    … <p>Ultrasonic vector flow mapping (VFM) is a method to visualize cardiac flow using vectors. … In this article, the VFM algorithm estimating the blood flow vector based on ultrasound doppler measurement and a two dimensional mass conservation law (2D flow assumption) for cardiac flow is briefly reviewed. …

    Oyo Buturi 88(6), 404-407, 2019

    J-STAGE 

  • Basics of adjustment of ultrasonic blood flow imaging  [in Japanese]

    SHIMANO Toshiaki

    … <p>Ultrasonic blood flow imaging such as color Doppler imaging or power Doppler imaging is a very useful function in diagnosis of abnormalities of vessels and organ function. … In this paper, in order to make better adjustments and obtain correct information from the blood flow imaging mode, I will explain the meaning of those condition adjustments and the key points of the adjustment method. …

    Choonpa Igaku 46(4), 295-307, 2019

    J-STAGE  Ichushi Web 

  • Principle of Ultrasonic Diagnostic Imaging  [in Japanese]

    YOSHIDA Kenji

    Journal of The Society of Instrument and Control Engineers 58(7), 489-493, 2019

    J-STAGE 

  • Experimental study for transient flow rate measurement by means of ultrasonic pulsed Doppler method  [in Japanese]

    FURUICHI Noriyuki , WADA Sanehiro

    … <p>This paper reports the investigations of the transient flow rate of the several flow meters and the ultrasonic flowmeter based on the pulsed Doppler method. … The reference flow rate is given by the gravimetric method which is newly established in NMIJ. …

    The Proceedings of the Fluids engineering conference 2018(0), OS4-4, 2018

    J-STAGE 

  • Study on Estimation Method of Blood Viscosity by Two-Dimensional-Ultrasonic-Measurement-Integrated Blood Flow Analysis  [in Japanese]

    KISHIMOTO Takuya , KADOWAKI Hiroko , MORI Koji , SAITO Takashi

    … <p>As one of method of evaluating blood viscosity, the 2D ultrasonic measurement integrated blood flow analysis system is known. … This method can estimate the actual blood flow field from the difference between numerical fluid analysis and Doppler velocity of blood flow obtained from ultrasonic measurement. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J0410404, 2018

    J-STAGE 

  • Study on thermal fatigue mechanism at a mixing tee pipe  [in Japanese]

    MIYOSHI Koji , KUBOTA Hiroki , KANAMOTO Shinichiro , SUGIMOTO Katsumi , MURAKAWA Hideki , ASANO Hitoshi

    … Mock-up tests were carried out with tracer method and Ultrasonic Doppler Velocimetry (UDV) in order to investigate flow characteristics at the mixing tee to cause the temperature fluctuation. …

    The Proceedings of the National Symposium on Power and Energy Systems 2018.23(0), D212, 2018

    J-STAGE 

  • Non-invasive Measurement of Water Temperature by a Combined Method of Ultrasound and Laser  [in Japanese]

    TAKAHASHI Manabu , IHARA Ikuo , WATANABE Hirokazu , ABE Masanori

    … <p>In this study, we have developed a combined method of ultrasound and laser to make non-invasive measurements of water temperature. … In the proposed method, a laser Doppler vibrometer (LDV) is used to detect ultrasonic pulse waves propagating through a certain distance of water so that the ultrasonic velocity can be determined from the detected ultrasonic waves. …

    Journal of The Japanese Society for Non-Destructive Inspection 67(9), 486-492, 2018

    J-STAGE 

  • Fetus and mother are a deterministic chaos:Analysis of surrogate data method  [in Japanese]

    Ishiyama Sayuri , Iwanaga Hiroaki , Tahara Takashi , Kiyooka Yoshiko , Ohashi Kazutomo

    … METHODS:We measured heart sounds of four human fetuses and their mothers during 11th-36th week of gestation using an ultrasonic Doppler apparatus. … We investigated non-linearity of the data using the surrogate method. …

    Journal of Nursing Science and Engineering 5(1), 74-79, 2018

    J-STAGE  Ichushi Web 

  • Development of In-vehicle and Continuously Measureable Sphygmomanometer based on Ultrasonic Doppler Method  [in Japanese]

    Arakawa Toshiya , Sakakibara Noriaki , Kondo Shinji

    筆者らは,職業運転手が運転時に血圧を計測し,体調管理に寄与できるシステムの構築を目指している.これまでに筆者らは,ステアリングに装着することが可能で,運転時にドライバがステアリングを把持しながら血圧を計測できるシステムの開発を進めてきた.しかし,ステアリングに装着する方式の場合,ステアリング径やスポークの太さなど,特定の車両に特化した仕様となってしまい,どのようなクルマに対しても,同じシステムを流 …

    Proceedings of IIAE Annual Conference 2017(0), 59-60, 2017

    J-STAGE 

  • Lamb Wave Generation Based on Laser Ablation with Damage Prevention  [in Japanese]

    YOSHINAGA Atsushi , OKUMURA Yohei , HOSOYA Naoki , KANDA Atsushi , IWASAKI Saya , KAJIWARA Itsuro

    … This paper proposes a method of Lamb wave generation based on laser ablation with damage prevention chip for non-contact damage detection for huge objects such as aircraft structures. … In recent years, a damage detection method using Lamb waves has been studied. … In many cases, contact devices such as a piezoelectric transducer and an ultrasonic probe are used to generate Lamb waves. …

    The Proceedings of the Dynamics & Design Conference 2017(0), 441, 2017

    J-STAGE 

  • Influence of the waveform on velocity profile measurement using ultrasound time-domain correlation method  [in Japanese]

    WADA Sanehiro , FURUICHI Noriyuki , SHIMADA Takashi

    … <p>This paper presents the influence of the waveform on velocity profile measurement using ultrasonic time-domain correlation (UTDC) method. … UTDC is a type of flow metering method that is applicable to the on-site calibration. … The advantages of this method are the possibility of no-limitation of velocity range and applicability to flow fields without enough reflectors. …

    The Proceedings of the National Symposium on Power and Energy Systems 2017.22(0), B214, 2017

    J-STAGE 

  • Feasibility study of upper air observation method using drone  [in Japanese]

    Inoue Minoru , Sasaki Kansuke , Kobayashi Tomoki , Tsujimoto Hirofumi , Shimura Tomoya

    … According to the preliminary investigation, it was found that the wind direction and wind speed observed by the drone equipped with a microminiature ultrasonic anemometer showed a good agreement with the observation data by a meteorological observation tower. … The vertical profile of wind direction and wind speed at Sakurajima observed by drone agreed well with the observation data of doppler lider installed at sites near the flight site. …

    Proceeding of Annual Conference 30(0), 52, 2017

    J-STAGE 

  • Analysis of Physical Properties of Foods Relating to Water and Their Application  [in Japanese]

    KUMAGAI Hitoshi

    … The maximum velocity through the human pharynx, <i>V</i><sub>max</sub>, which is obtained by the ultrasonic pulse Doppler method, is considered to be a good predictor of aspiration risk for patients with dysphagia. …

    Japan Journal of Food Engineering 18(1), 1-18, 2017

    J-STAGE  JASI 

  • Estimation method of surface hardness of cement during hardening process by high-intensity aerial ultrasonic wave  [in Japanese]

    藤原 甫 , 大隅 歩 , 伊藤 洋一

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116(241), 1-6, 2016-10-07

  • Evaluation of Interfacial Adhesion Strength of Composite Plate Using Laser Ultrasonic Waves  [in Japanese]

    HIRAKU Atsuki , SUGIURA Daisuke , NISHIMURA Masaomi , GOTO Keita , ARAI Masahiro , ITO Hiroaki , CHO Hideo

    … Displacement velocities of specimen back surface were measured by a laser Doppler vibrometer. … Interfacial stress was analyzed by 3 dimensional wave propagation simulation using Boundary Element Method. …

    The Proceedings of the Materials and Mechanics Conference 2016(0), OS12-20, 2016

    J-STAGE 

  • Visualization of Two-Dimensional Velocity Vector Using Phased Array UVP Technique

    KIKURA Hiroshige , IHARA Tomonori

    … <p>Phased array ultrasonic velocity profiler (PAUVP) method is presented. … Since UVP is applied to various kind of flows, ultrasonic transducer should be design accordingly depending on the flow configuration. … Vector reconstruction technique is then described, which employs differences of Doppler frequencies analyzed in the transducer array. …

    Journal of the Visualization Society of Japan 36(142), 31-35, 2016

    J-STAGE 

  • Velocity Extension Method for Use with UVP and Application for Flow Rate Measurement

    MURAKAWA Hideki , MURAMATSU Ei

    … <p>The ultrasonic velocity profile (UVP) method is a powerful tool for measuring velocity profiles in a pipe and it has been applied for measuring flow rate. … In this paper, a velocity extension method for use with ultrasonic pulsed Doppler method is introduced to increase the maximum detectable velocity which is limited by the Nyquist sampling theorem. …

    Journal of the Visualization Society of Japan 36(142), 26-30, 2016

    J-STAGE 

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