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Study on Expert System of Magnetic Flux Leakage Data Analysis of Pipeline

Author: CaoLiNa
Tutor: LiJian
School: Tianjin University
Course: Precision instruments and machinery
Keywords: Pipeline inspection MFL data Graphical display Data recovery Data processing Seam Recognition Corrosion defect
CLC: TH878.3
Type: Master's thesis
Year: 2007
Downloads: 159
Quote: 0
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Abstract


All pipe-line detection technology to the longest history of magnetic flux leakage inspection, the widest range of applications. The basis of the detected magnetic flux leakage pipeline magnetic flux leakage detector signals need to be processed by a specialized data analysis software to get the pipeline corrosion, as was seized pipeline excavation, maintenance work. The speed of the magnetic flux leakage signal analysis, the correctness and accuracy of processing results seriously affect the progress and quality of the magnetic flux leakage testing. Diversification of the topic for the magnetic flux leakage data graphic display, intelligent data analysis and data processing acceleration expand, and the actual development of the magnetic flux leakage testing data analysis expert system. This article briefly describes the method of detection technology pipeline, significance, meaning and software system based on the leakage flux method of magnetic flux leakage pipeline inspection components and their functions, the course of their work and the magnetic flux leakage data analysis functions. Vast amounts of magnetic flux leakage data to study the magnetic flux leakage data arrangement of the main data file format. File system processing speed is fast and multithreaded advantage of set three buffer to read the data, to solve the data read display slow. Correspondence relationship in accordance with the pipeline exception point changes in the amplitude of the magnetic flux leakage data and curves, grayscale, color change, and the different types of magnetic flux leakage data processing method of the graphical display. Analysis of the causes of the non-normal magnetic flux leakage data MFL data repair solution. Magnetic flux leakage signal can reflect the characteristics of the pipeline characteristics, types of pipe welds and corrosion defect identification method; ground tag files, positioning methods of corrosion defects. The traction test defects quantify the empirical formula, the formula for a certain deformation calculated defect length, width, and depth. Use of international standards, the damage assessment equation and predict the parameters of the pipeline nature defects quantify the results, based on defects in the horizontal and vertical coordinates of relationship failure assessment diagram obtained defect failure assessment diagram. Finally, an overview of the use of software development tools, the actual preparation of the magnetic flux leakage testing data analysis expert system and user reporting system. Analysis system using data structures and database design, performance and operational requirements to meet the requirements of the data analysis. Customized report system uses a combination of graphics and tables, and to output more intuitive test report.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Material testing machine and test equipment > Nondestructive flaw detector > Magnetic detector
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