Applying a moving magnetic field to a wire rope, changing its magnetic domain morphology and the direction of electron spin magnetic moment, can establish a “memory magnetic field” in the wire rope. The magnetic memory type weak magnetic non-destructive testing technology fully utilizes the magnetic memory characteristics of wire rope. It uses a wide range, non-contact weak magnetic sensing sensor to continuously and uninterruptedly collect the magnetic energy potential difference information memorized by the wire rope, and quantitatively detect various defects such as wire breakage, abrasion, corrosion, fatigue, etc. caused by strength loss of the wire rope.

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