第7回
水中レーザ溶接向け渦電流探傷試験の適用性評価
著者:
小林 徳康,Noriyasu KOBAYASHI,糟谷 高志,Takashi KASUYA,上野 聡一,Souichi UENO,落合 誠,Makoto OCHIAI,湯口 康弘,Yasuhiro YUGUCHI
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Abstract We clarified a defect detecting capability of eddy current testing (ECT) as a surface inspection technique for underwater laser beam welding. An underwater laser beam welding procedure includes groove caving as a preparation, laser beam welding in groove and welding surface grinding as a post treatment. Therefore groove and grinded welding surface inspections are required underwater. We curried out defect detection test s using three kinds of specimens simulated a groove, reactor vessel nozzle dis...
英字タイトル:
Applicability Evaluation of Eddy Current Testing for Underwater Laser Beam Welding
第2回
炉内点検技術と高経年化プラントへの適用
著者:
山本 智,Satoshi YAMAMOTO,平澤 泰治,Taiji HIRASAWA,大坪 徹,Tooru OOTSUBO,落合 誠,Makoto OCHIAI,坂口 正武,Masatake SAKAGUCHI,亀山 育子,Ikuko KAMEYAMA
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The request of the inspection to reactor internals is increasing with application of the Japanese operation and maintenance code to aged nuclear power plants. Toshiba has developed many outstanding under water inspection t echnologies combined with ultrasonic testing (UT) techniques and remote operated vehicles (ROVs) technologies. Water gap phased array UT technique is capable to apply to all internals including complicated form part such a s reactor bottom head penetration weldment. Laser-ultrasonic te...
英字タイトル:
Inspection Technologies for Reactor Internals of Aged Nuclear Power Plants
第7回
炉内目視点検向け3次元計測システム
著者:
相川 徹郎,Tetsuro AIKAWA,佐藤 美徳,Yoshinori SATOH,大嶽 達哉,Tatsuya OODAKE,落合 誠,Makoto OCHIAI,湯口 康弘,Yasuhiro YUGUCHI
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The main roles of in-vessel visual inspection (IVVI) are to detect cracks on the surface of internal structures and measure the length of the cracks. For accurately performing those matters by visual inspection, inspectors sometimes need to obtain three-dimensional (3D) measurements of cracks and 3D shape of the surface. We have been developing a prototype system to obtain 3D measurements. This system is based on stereo vision technique and has on ly one measurement head that has an inner movable camera m...
英字タイトル:
Three-Dimensional Measurement System for In-Vessel Visual Inspection
第6回
炉内目視点検向け3次元計測システム
著者:
相川 徹郎,Tetsuro AIKAWA,佐藤 美徳,Yoshinori SATOH,大嶽 達哉,Tatsuya OODAKE,落合 誠,Makoto OCHIAI,湯口 康弘,Yasuhiro YUGUCHI
発刊日:
公開日:
キーワードタグ:
The main roles of in-vessel visual inspection (IVVI) are to observe internal structures and crack on the structure surface. For accurately checking those matter s by visual inspection, inspectors sometimes need three-dimensional (3D) recognitions. Therefore, we developed a prototype system that has only one inspection h ead to obtain 3D measurements. This system is based on our 3DVT (3 Dimensional Visual Testing) technique that we have been developing. This report proposes that prototype measurement head a...
英字タイトル:
Three-Dimensional Measurement System for In-Vessel Visual Inspection
第6回
目視検査画像の超解像度処理による検査員支援システム
著者:
佐藤 美徳,Yoshinori SATOH,相川 徹郎,Tetsuro AIKAWA,湯口 康弘,Yasuhiro YUGUCHI,安達 弘幸,Hiroyuki ADACHI,落合 誠,Makoto OCHIAI
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公開日:
キーワードタグ:
In-Vessel Visual Inspection (IVVI) is usually conducted as indirect visual inspection with remote TV cameras. We often face the following issues in IVVI. When IVVI is conducted at narrow spa ce in the vessel, it is difficult for inspectors to set the cameras to the best position remotely and manually. When the cameras are quickly moved to reduce hours of IVVI, the visibility be comes poor because of motion blurs. For overcoming these problems, we focused on “Super Resolution (SR)” that is one of image proc...
英字タイトル:
In-Vessel Visual Inspection System using Super Resolution Technique