| The Boiler Tube Wall Thickness Quantitative Evaluation Fusing the Magnetic and Ultrasonic Technique |
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| 作者姓名： | SONG Xiaochun~ |
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| 作者单位： | SONG Xiaochun~(1，2) HUANG Songling~2 ZHAO Daxing~1 (1.School of Mechanical Engineering，Hubei University of Technology，Wuhan 430068，China，2.State Key Lab ef Power Systems，Department of Electrical Engineering，Tsinghua University，Beijing 100084，China) |
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| 基金项目： | Project(No.20045006071-27)supported by the Youth Chengguang Project of Science and Technology of Wuhan City of China，the Open Foundation of Hubei Key Laboratory of Modern Manufacture Quality Engineering(No.LMQ2005B07). |
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| 摘 要： | Wall thickness is always a key index for boiler tube inspection in power plant,in order to improve the inspection efficiency and accuracy,a new method fusing the magnetic and ultrasonic technique was proposed.The magnetic technique was used to do full inspection and locate the flaws,and the ultrasonic was employed to implement further quantitative inspection accu- rately.After comparing the precision of the polynomial,exponential and logarithmic function,the polynomial model was selected to fit the relations between the wall thickness and the peak value of magnetic signals,and the data measured by ultrasonic thickness meter was used to calibrate the model parameters online,the defect depth can be sized quickly.The experimental results demon- grate that the model used in this system has better accuracy than the statistics relation model clearly,and it is also suitable for defect evaluation real-time.Moreover,it is unnecessary to have much more experimental data for the curve fitting technology,so it has better practicability than the other methods.
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The Boiler Tube Wall Thickness Quantitative Evaluation Fusing the Magnetic and Ultrasonic Technique |
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| SONG Xiaochun.The Boiler Tube Wall Thickness Quantitative Evaluation Fusing the Magnetic and Ultrasonic Technique[J].Journal of Wuhan University of Technology,2006(Z3). |
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| Authors: | SONG Xiaochun |
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| Affiliation: | SONG Xiaochun~ |
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| Abstract: | Wall thickness is always a key index for boiler tube inspection in power plant,in order to improve the inspection efficiency and accuracy,a new method fusing the magnetic and ultrasonic technique was proposed.The magnetic technique was used to do full inspection and locate the flaws,and the ultrasonic was employed to implement further quantitative inspection accu- rately.After comparing the precision of the polynomial,exponential and logarithmic function,the polynomial model was selected to fit the relations between the wall thickness and the peak value of magnetic signals,and the data measured by ultrasonic thickness meter was used to calibrate the model parameters online,the defect depth can be sized quickly.The experimental results demon- grate that the model used in this system has better accuracy than the statistics relation model clearly,and it is also suitable for defect evaluation real-time.Moreover,it is unnecessary to have much more experimental data for the curve fitting technology,so it has better practicability than the other methods. |
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| Keywords: | boiler tube main magnetic flux ultrasonic non-destructive testing |
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