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Study on Key Techniques of Automatic Testing and Measurement System for Tubing

Author: LiuBin
Tutor: KangYiHua；WuXinJun
School: Huazhong University of Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Straight steel pipe Magnetic Flux Leakage Testing Thickness measurement Measuring
CLC: TH878.3
Type: Master's thesis
Year: 2007
Downloads: 72
Quote: 0
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Abstract


Steel pipe has been widely used in petroleum, chemical , boilers, machinery and other industries . In order to improve the quality of the product , reduce industrial applications accidents , and improve the economic benefits destructive testing of steel flat has a very important significance . Destructive testing methods and systems of domestic and foreign steel pipe , steel pipe production and manufacturers to use non-destructive testing of steel pipe automation requirements , combined with the characteristics of the flat steel tube , magnetic flux leakage nondestructive testing system for multi-specification steel pipe , a steel pipe longitudinal and transverse defect detection and measurement of wall thickness and length measurements . , Steel pipes used in such detection and measurement of the transmission mode pipe straight forward and pipe screw advancing in two ways, a different transmission mode, the structure and arrangement of the probe are different . Analysis comparing selected steel pipe spiral movement forward , the calculation method of the key parameters of this movement . The transverse magnetization of the design, to select the open - circuit mode of magnetization of the double coil . To make a probe can be applied to all the specifications of the steel pipe detection , the opening and closing of a strip of horizontal probe and the probe position adjusting mechanism is proposed and designed to reduce costs and simplify operations . With the improvement of steel quality requirements of the American Petroleum Institute , the pipe wall thickness measurement and length measurement requirements . To this end, the article describes the pipe wall thickness measurement of magnetic detection methods , along the pipe axially magnetized thickness measurement method and the combined thickness measurement along the pipe longitudinal magnetization applied to practice, the pipe wall thickness -line , high-speed , continuous accurate measurement ; proposed a simple length of pipe line measurement methods to meet the requirements of low - precision length measurement . The detection and measurement requirements , design and development of test software , the focus on software to achieve the length measurement and the magnetic thickness measurement method . Further , given the straight pipe magnetic flux leakage detection system , the installation of the system , using the run test introduced . The practice shows that the system testing capability , high signal-to-noise ratio , and with good reproducibility and stability .

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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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