第5回
ガイド波による配管減肉検査システム
著者:
小平 小治郎,Kojirou KODAIRA,永島 良昭,Yoshiaki NAGASHIMA,三木 将裕,Masahiro MIKI,遠藤 正男,Masao ENDOU
発刊日:
公開日:
キーワードタグ:
A pipe inspection system using ultrasonic guided wave with inter-digital transducer was developed. In this system, for uni-directional transmission, a pair of transducer is set axially on the pipe with a separation of one-quarter of the wavelength, and a one-quarter period delayed anti-phased waveforms are applied to the pair. By this method, the amplitude of the syn thetic traveling wave in the minus direction can be completely decreased to zero in theory. For 50A pipe specimen, artificial discontinuities...
英字タイトル:
A Pipe Inspection System Using Ultrasonic Guided Wave
第6回
ガイド波を用いた大口径配管の減肉検査技術
著者:
三木 将裕,Masahiro MIKI,永島 良昭,Yoshiaki NAGASHIMA,遠藤 正男,Masao ENDOU,小平 小治郎,Kojiro KODAIRA
発刊日:
公開日:
キーワードタグ:
真庭 一彦 Kazuhiko MANIWA Guided wave inspection technique is effective for detecting defects like corrosion in piping, because it can perform long range inspection. It is possible to expect this inspection as a metho d that leads to the decrease of the inspection process and its cost, because the incidental work can be reduced. Especially, the contraction effect of the inspection work is extensive in larg e-diameter piping inspection. In this paper, we introduce the guided wave inspection system to large-d...
英字タイトル:
Wall Thinning Inspection Technique for Large-Diameter Piping using Guided Wave
第15回
配管減肉検査における非接触超音波センサの実機適用に向けた検討
著者:
田村 明紀,遠藤 正男,河野 尚幸,(日立製作所),大城戸 忍,(日立GE),Chenghuan Zhong,Maria Kogia,(Inductosense),Anthony J. Croxford,Paul D. Wilcox,(ブリストル大)
発刊日:
公開日:
キーワードタグ:
A pipe-wall thinning measurement is required to ensure integrity of a piping system in a power plant. Aiming to reduce the inspection time of the pipe-wall thinning measurement, we have been developing an innovative measurement technology which enables the pipe-wall thinning inspection without removing the insulation, based on the non-contact ultrasonic sensor proposed by University of Bristol. To apply this technology to the actual plant inspection, the sensor durability needs to be confirmed. In this stud...
英字タイトル:
Investigation into applicability of a non-contact ultrasonic sensor to pipe-wall thinning inspection of power plants
第17回
配管減肉計測向け非接触超音波センサの実機模擬配管における 適用性確認
著者:
田村 明紀,遠藤 正男,(日立製作所),沖田 俊介,大城戸 忍,(日立GE),Chenguhuan Zhong,(Inductosense Ltd),Anthony J. Croxford,Paul D. Wilcox,(Bristol大)
発刊日:
公開日:
キーワードタグ:
A pipe-wall thinning measurement is required to ensure integrity of a piping system in a power plant. Aiming to reduce the inspection time of the pipe-wall thinning measurement, we have been developing an innovative measurement technology which enables the pipe-wall thinning inspection without removing the insulation, based on the non-contact ultrasonic sensor. To confirm applicability of this sensor to the pipe-wall thinning inspection in actual plants, we performed the thickness measurement tests by using...
英字タイトル:
Applicability confirmation of the non-contact ultrasonic sensor by the pipe simulating actual plant conditions