Wire rope magnetic flux leakage detecting sensor
A magnetic flux leakage detection and steel wire rope technology, applied in the direction of material magnetic variables, can solve problems such as difficulty in direct identification, induction of non-defect abnormal signals, fluctuations in the distance between the magnetic flux leakage sensor and the steel wire rope, etc., and achieve the effect of improving the detection ability
Pending Publication Date: 2018-11-02
GUANGDONG INSPECTION & RES INST OF SPECIAL EQUIP ZHUHAI INSPECTION INST +1
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The magnetic flux leakage sensor needs to move relative to the steel wire rope. During the movement, the distance between the magnetic flux leakage sensor and the steel wire rope often fluctuates, which induces non-defect abnormal signals; on the other hand, the magnetic flux leakage signals induced by small defects are easily overwhelmed by noise. It is difficult to directly distinguish from a single magnetic flux leakage detection signal
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[0020] The following will clearly and completely describe the conception, specific structure and technical effects of the present invention in conjunction with schematic diagrams, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention.
[0021] like figure 1 and figure 2 As shown, a steel wire rope magnetic flux leakage detection sensor includes a sensor body 1, and the sensor body 1 is provided with a forward detection device 11 for detecting the magnetized steel wire rope near saturation magnetization state and detecting the leakage field component at the defect in the residual magnetic state The backward checking device 12.
[0022] The...
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The invention discloses a wire rope magnetic flux leakage detecting sensor. The wire rope magnetic flux leakage detecting sensor is characterized by comprising a sensor body, wherein the sensor body is provided with a forward detecting device for detecting a near-saturation magnetization state of a magnetized wire rope and a backward calibration device for detecting leakage magnetic field components at a defect in a residual magnetic state. The forward detecting device of the wire rope magnetic flux leakage detecting sensor detects a leakage magnetic field on the surface of the wire rope in the near-saturation magnetization state, and the backward calibration device detects the leakage magnetic field on the surface of the wire rope in the residual magnetic state, and the same wire rope detected at least twice. By obtaining all direction components of the spatial distribution of the defect leakage magnetic field, mutual compensation and verification are realized, and the detection capability of the magnetic flux leakage sensor for various types of defects is improved.
Description
technical field [0001] The invention relates to the technical field of electromagnetic non-destructive testing, in particular to a steel wire rope magnetic flux leakage detection sensor. Background technique [0002] The magnetic flux leakage method is an important method for the non-destructive detection of steel wire rope defects, and various types of sensor detection technologies have been developed. Generally, the sensor uses a single magnetic sensitive element or a single ring array to detect the defect leakage field. The magnetic flux leakage sensor needs to move relative to the steel wire rope. During the movement, the distance between the magnetic flux leakage sensor and the steel wire rope often fluctuates, which induces non-defect abnormal signals; on the other hand, the magnetic flux leakage signals induced by small defects are easily drowned by noise. It is difficult to directly distinguish from a single magnetic flux leakage detection signal. Contents of the ...
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IPC IPC(8): G01N27/82
CPCG01N27/82
Inventor 杨宁祥刘秀成王金超戚政武陈英红丛成龙梁敏健陈胜来
Owner GUANGDONG INSPECTION & RES INST OF SPECIAL EQUIP ZHUHAI INSPECTION INST