Nondestructive inspection device for wire rope

Abstract

The invention discloses a nondestructive inspection device for a wire rope. In addition to an excitation component, a sensor component and a data processing module, the nondestructive inspection device also comprises an angle encoder, wherein the sensor component is a sensor differential array composed of n pairs of sensors; the n pairs of sensors are distributed on two rings having equal radii; the axes of the two rings coincide; the distance between the two rings is a strand wave period length of a wire rope; the sensors on each ring are distributed at equal angles; the sensors belonging to one pair are distributed on the same angle positions of the two rings; the sensor differential array is positioned in the excitation component; the wire rope to be inspected is penetrated through the sensor differential array and is in contact with a roller wheel of the angle encoder; the data processing module performs differential operation on collection signals of each pair of sensors to obtain n differential results; and if a peak exists among the differential results, the wire rope is considered as having a damage defect. According to the invention, strand wave noise interference can be effectively eliminated.

Description

technical field [0001] The invention belongs to the field of nondestructive testing, in particular to a nondestructive testing device for steel wire ropes. Background technique [0002] Steel wire rope is widely used as a key component for lifting, transporting and bearing the weight of equipment due to its many advantages such as high strength, light weight, good elasticity, stable and reliable operation, and can run under high-speed working conditions. During the long-term operation of the steel wire rope, affected by environmental corrosion, uncertain alternating loads, mechanical shock, wear, etc., there will be damages such as broken wires, abrasion, corrosion, etc., which will lead to a decrease in the strength of the steel wire rope or even a sudden break over time. If it stops, the machine will be destroyed and people will die. [0003] There are many non-destructive testing methods for steel wire ropes that have been discussed in theory. At present, only the electr...

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Problems solved by technology

[0005] At present, there is a problem with the non-destructive testing method of steel wire rope by detecting the magnetic flux leakage signal: compared with the background magnetic signal of the steel wire rope, the magnetic flux leakage signal is very weak, and there is a strand wave in the steel wire rope itself, which interferes with the magnetic flux leakage signal, so the magnetic flux leakage signal It is easy to be confused or overwhelmed by other signals, resulting in missed and misjudgment

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