Abstract
The technique of weak magnetic stress internal detection is manifested in the weak magnetic field environment, including the geomagnetic field. The aim of weak magnetic stress internal detection technology is to detect the area of stress damage. Stress damage degree of ferromagnetic components is determined by detecting the weak magnetic signal on the surface of stress concentration area of ferromagnetic components. Weak magnetic stress internal detection technology of the pipeline can effectively detect the stress concentration region where the pipeline has not formed macroscopic defects, and advance the pipeline safety alarm time, which makes up for the weaknesses of the traditional magnetic flux leakage internal detection technology. In this chapter, the key technologies of the weak magnetic stress internal detection are stated. The detection mechanism, influencing factors, and engineering tests of weak magnetic stress detection technology are deeply analyzed. Furthermore, the future development direction of the weak magnetic stress internal detection technology is proposed.
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