孫 宏君
著者に関連した記事は4件です。
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第16回
超音波可視化技術および数値解析を用いた焦点型電磁超音波探触子の評価
著者:
手塚 晃世,（東北大）,山本 敏弘,（発電技検),孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Ultrasonic wave visualization system Decommissioning Finite element analysis Non-destructive testing (NDT) Pipe wall degradation Point Focusing EMAT Ultrasonic testing (UT)
手塚 晃世,（東北大）,山本 敏弘,（発電技検),孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Ultrasonic wave visualization system Decommissioning Finite element analysis Non-destructive testing (NDT) Pipe wall degradation Point Focusing EMAT Ultrasonic testing (UT)
Electromagnetic acoustic transducer (EMAT) is suited to monitoring because of its non-contacting nature. However, a standard EMAT tends to give overestimating results because the estimated thickness is associated with the average of varying thickness over an area under the coil of EMAT. To solve this problem, Point-Focusing EMAT (PF EMAT), which concentrates ultrasonic waves at a certain point, was applied to thickness gauging. This study evaluates the focusing property of PF EMAT and its applicability to l...
英字タイトル:
Evaluation of Point Focusing EMAT using ultrasonic wave visualization system and finite element analysis
英字タイトル:
Evaluation of Point Focusing EMAT using ultrasonic wave visualization system and finite element analysis
第16回
配管減肉のモニタリングと予測に基づく配管システムのリスク管理 (4)電磁超音波共鳴法による配管減肉測定のデータ処理方法
著者:
孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Autocorrelation function Cepstrum Electromagnetic acoustic resonance Electromagnetic acoustic transducer Multiplication of nth compression Superposition of nth compression
孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Autocorrelation function Cepstrum Electromagnetic acoustic resonance Electromagnetic acoustic transducer Multiplication of nth compression Superposition of nth compression
The electromagnetic acoustic resonance (EMAR) method with an electromagnetic acoustic transducer (EMAT) is proposed for pipe wall thinning measurement in the previous study. In this study, the Cepstrum method is proposed to process the data obtained by an EMAR method, and it is compared with the previous autocorrelation function (ACF), superposition of nth compression (SNC), multiplication of nth compression (MNC) methods. The Cepstrum method can evaluate the thickness range of the specimen under EMAT. Also...
英字タイトル:
Piping System, Risk Management based on Wall Thinning Monitoring and Prediction Data Processing Methods of Pipe Wall Thinning Measurement by Electromagnetic Acoustic Resonance (EMAR)
英字タイトル:
Piping System, Risk Management based on Wall Thinning Monitoring and Prediction Data Processing Methods of Pipe Wall Thinning Measurement by Electromagnetic Acoustic Resonance (EMAR)
第15回
配管減肉測定の高度化を目指した焦点型電磁超音波探触子の開発
著者:
手塚 晃世,孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Electromagnetic acoustic transducer Flow accelerated corrosion Nondestructive testing Pipe wall thinning Point Focusing EMAT Ultrasonic testing
手塚 晃世,孫 宏君,浦山 良一,内一 哲哉,高木 敏行,（東北大）
発刊日:
公開日:
キーワードタグ:
Electromagnetic acoustic transducer Flow accelerated corrosion Nondestructive testing Pipe wall thinning Point Focusing EMAT Ultrasonic testing
Electromagnetic acoustic transducer (EMAT) generates ultrasonic wave without direct contact with the specimen. This feature allows EMAT to be used under higher temperature environment compared with piezoelectric transducer, which means EMAT has a potential to be applied to monitoring of the piping system of operating power plants. However, the conventional EMAT may read thicker than the actual thickness of the pipe wall in the case of degraded pipes with rough surface. This is because the reflected signal i...
英字タイトル:
Development of point focusing electromagnetic acoustic transducer for accurate pipe wall thinning measurement
英字タイトル:
Development of point focusing electromagnetic acoustic transducer for accurate pipe wall thinning measurement
第15回
電磁超音波共鳴法による配管減肉測定技術と原子炉配管への適用
著者:
高木 敏行,内一 哲哉,浦山 良一,孫 宏君,（東北大）
発刊日:
公開日:
キーワードタグ:
electromagnetic acoustic resonance monitoring system nondestructive testing pipe wall thinning thickness measurement
高木 敏行,内一 哲哉,浦山 良一,孫 宏君,（東北大）
発刊日:
公開日:
キーワードタグ:
electromagnetic acoustic resonance monitoring system nondestructive testing pipe wall thinning thickness measurement
In this study, we developed a method to measure pipe wall thinning by electromagnetic acoustic resonance method (EMAR) which is one of electromagnetic ultrasonic method. The EMAR can evaluate the thickness of piping with high accuracy. In addition, we propose a method to obtain the resonance frequency with high accuracy when the thickness reduction progresses and the SN ratio decreases. We applied the technology to PWR and BWR pipings and examined its applicability....
英字タイトル:
Wall thickness measurement of piping using electromagnetic acoustic resonance method and its application to nuclear reactor cooling system
英字タイトル:
Wall thickness measurement of piping using electromagnetic acoustic resonance method and its application to nuclear reactor cooling system