148件が見つかりました。

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第6回
配管用超音波連続肉厚測定装置とその適用
著者:
芳賀 啓之,Hiroyuki HAGA,松尾 祐次,Yuji MATSUO,田村 孝市,Koichi TAMURA
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In petrochemical plant, many steel piping lines which used on various conditions exist. For the reason, the management about ageing of piping is a serious problem. Recently, we are anxious about the increase in the plant accident in which Ageing of piping occurs by the cause. In the manage ment of pipe, it is the most serious problem that is overlooking of the local metal loss to be caused of corrosion, erosion, etc.. Authors develo ped the ultrasonic continuously thick...
英字タイトル:
Ultrasonic Continuously Thickness Measurement System for Piping and Application
第6回
電子回路信頼性長期化技術　瀧川 憲（横河電機株式会社）
著者:
瀧川 憲,Akira TAKIKAWA
発刊日:
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We introduce maintenance service not for repairing failed parts but for avoiding risk. These concepts realize stable operation of customer's system. (1)The technology to prolong a reliability of electric circuits is the one to wash electrical boards with pure water to restore a reliability of hardware as a dedicated equipped automobile goes to customer sit es. (2)ODU (Online Diagnosis Unit) is to provide assessment of installation environment for healthiness and deterioration trend with 6 sensors. (3) * IP...
英字タイトル:
Technology for prolonging reliability of electronics Printed Circuit Board
第6回
電気・計測制御設備の予防保全～受配電設備・電動機～
著者:
岡澤 周,Hiroshi OKAZAWA,中澤 一郎,Ichiro NAKAZAWA,沖田 哲夫,Tetsuo OKITA,藤田 祐成,Hiroshige FUJITA
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1.緒言3. 受配電設備における劣化診断受配電設備の“絶縁物”の劣化診断は、従来、絶 発電所設備の中で電気・計測制御設備はプラント縁抵抗(メガー)値測定や放電ノイズ測定などにより 全体の機能を保持する上で重要な設備であるが、機行なわれてきたが、これらの電気的手法は測定時の 械的な損耗等の目立った劣化がなく、使用環境(塵天候(温度・湿度)に大きく影響され、特に劣化が進 埃、温度、湿度、腐食性ガス)により絶縁物の劣化、んだ状態であるほど湿度の影響が顕著となり、例え 機構が動きにくくなる(固渋)現象が進行し、故......
英字タイトル:
Maintenance of Electrical and Measuring Controlled Equipment --CC, motor
第6回
電気・計測制御設備の予防保全～大型発電機～
著者:
泉谷 晃,Akira IZUTANI,柳森 浩,Hiroshi YANAGIMORI
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中澤 一郎 Ichiro NAKAZAWA To reduce the period of rewinding of stator coil of large generator, special tools for cu tting stator coil, disassembling wedge, and drawing stator coil are developed and used. T hese tools suppress occurrence of unnecessary substance and work load. Implementation sys tem is also being developed. The goal of developmentis to half the period of maintenance....
英字タイトル:
Maintenance of Electrical and Measuring Controlled Equipment -Large Generator
第6回
電磁診断技術による傷付与転がり軸受の測定及び信号処理による傷大きさの推定法
著者:
菅田 良,Ryo KAYATA,馬渡 慎吾,Shingo MAWATARI,黄 皓宇,Haoyu HUANG,ペラン ステファン,Stephane PERRIN,真木 紘一,Koichi MAKI
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The epochal electromagnetic nondestructive detection method was proposed. In that method a permanent magnet is zed to generate static magnetic field and a several hundred turn coil is used to detect the eddy currents induced inside ball bea rings. In the present study the signal procedure method of a autocorrelation method is also proposed in tion to that detection method and these methods are applied to observe and evaluate ball bearings wounded by grinder. erimental validatio ns are carried out using a c...
英字タイトル:
Lectromagnetic Nondestructive Detection for Wounded Bearings and Proposalof the Signal Procedure Method for Estimating the Wound Width
第6回
電磁診断技術を用いたタービン羽根の異常検出
著者:
黄 皓宇,Haoyu HUANG,柴下 直昭,Naoaki SHIBASHITA,釘本 三男,Mitsuo KUGIMOTO,塚本 透,Toru_ TSUKAMOTO
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This study proposes an electromagnetic method for the evaluation of the condition of the turbine in a nuclear power plant. Experimental re sults of a small turbine driven by an electric motor are shown in this paper. The results show that it is possible to detect the movement a nd condition of the impeller by applying the electromagnetic evaluation method. Moreover, an excitation experiment shows that the higher o rder vibration of the impeller can be detected and the distinction of the condition of with a...
英字タイトル:
Material Evaluation of Cast Iron based on Eddy Current
第6回
電磁非破壊評価法を用いたNi 基合金の鋭敏化評価
著者:
及川 諒太,Ryota OIKAWA,内一 哲哉,Tetsuya UCHIMOTO
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It is well known that alloy 600, one of Ni base alloys, is paramagnetic after solution heat treatment, but as sensitization increases, its magnetic properties change. In this study, fea sibility of nondestructive evaluation of sensitization of alloy 600 is discussed focusing on its magnetic properties. To investigate the relationship between magnetic properties and sen sitization, alloy 600 were heated in different temperatures and duration. Then, the relationship between magnetic properties and sensitizat...
英字タイトル:
Evaluation of Sensitization of Ni Base Alloys using Electromagnetic Nondestructive EvaluationMethod
第6回
非線形識別手法による回転機音響監視の高度化
著者:
兼本 茂,Shigeru KANEMOTO
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The acoustic data remotely measured by handy type microphones are investigated for monitoring and diagnosing the ball bearing type rotational machine integrity in nuclear power plants. The present study evaluates the state-of-the-art statistical signal processing and machine learning methods from the viewpoints of both sensitive and robust acoustic signal discrimination capability. The methods consist of feature extractions such as Fourier transformation or Cepstrum analysis, feature vector dimension compr...
英字タイトル:
Improvement of Acoustic Monitoring of Rotating Machine by non-linear classification method
第6回
高レイノルズ数実流校正設備による給水流量計の校正
著者:
古市 紀之,Noriyuki FURUICHI,寺尾 吉哉,Yoshiya TERAO,高本 正樹,Masaki TAKAMOTO
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A high Reynolds number calibration facility for feedwater flowmeter in nuclear power plant is described in the paper. This calibration facility is achieved a 1.8×10' Reynolds number which is equivalent one with the actual plant. A calibration res ult of ultrasonic flowmeters, which are used to measure feedwater flowrate in a nuclear power plant, is also described unde r a variety of upstream conditions. Through these calibrations, the calibration method of feedwater flowmeter is suggested....
英字タイトル:
Calibration of feedwater flowmeter by high Reynolds number calibration facility
第6回
高分子圧電フィルムを用いた円管内壁欠陥の測定とシミュレーション
著者:
髙橋 俊文,Toshibumi TAKAHASHI,松本 英治,Eiji MATSUMOTO
発刊日:
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Piezoelectric thin film has been used to visualize back surface defects in plates. When the plate with a back surface defect is deformed, the resultant strain distribution in the front surface reflects the shape of the de fect. Such surface strain distribution can be measured by scanning the electrostatic voltmeter over the piezoelectric film mounted on the front surface. In view of significant troubles of nuclear power plants due to defec t in pipes such as cracks and wastages, new nondestructive techniqu...
英字タイトル:
Measurement and Simulation of Detection of Defects on Inner Wallof Cylindrical Pipe by Piezoelectric High-polymer Film.
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