An X-ray Radioscopy System for Pipe Weld Inspection Using a Real-time Image Integration Method
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- HORIKOSHI Kiyomi
- Kimitsu Works, Nippon Steel Corporation
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- SHIRAKAWA Yoshiyuki
- Kimitsu Works, Nippon Steel Corporation
Bibliographic Information
- Other Title
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- リアルタイム画像積分処理による鋼管溶接部X線透視検査装置
Abstract
This paper describes an X-ray radioscopy system which has been developed for on-line welding inspection of large diameter steel tubes incorporating X-ray image integration technique as well as simultaneous control method for X-ray tube voltage and current. The simultaneous control of X-ray voltage and current features regulation of X-ray intensity which has permeated through steel tubes of varying wall thickness. This system censures stable statistical error range which leads to clear image. Also an X-ray image integrating technique which places emphasis on the contrast of defects against background has been developed. These technologies feature stable integration process under tubes' fluctuating traveling speed in a mill. By utilizing the proposed methods, those images involving defects are integrated 20 to 30 times to reduce statistical errors and processed into clear and high contrast images. Our on-line and off-line tests show penetrameter sensitivity within 1.0 to 1.4% at the welding thickness ranging from 10 to 40mm. This X-ray radioscopy has been in operation at a large diameter steel tube mill and has contributed to improved quality control of the tube products.
Journal
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- Transactions of the Society of Instrument and Control Engineers
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Transactions of the Society of Instrument and Control Engineers 32 (6), 811-819, 1996
The Society of Instrument and Control Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390282679476385280
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- NII Article ID
- 130003791133
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- ISSN
- 18838189
- 04534654
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed