Method for judging fault and non-fault signals by color codes in on-line fault detection of roll eddy current

A roll and signal technology, which is applied in the field of color code judgment of damaged and non-damaged signals, can solve problems such as large randomness, achieve the effects of repairing damage, improving work quality and efficiency, and prolonging service life

Inactive Publication Date: 2010-05-19
HUAIAN HAIHONG ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned interferences are intertwined and are highly random, so it is difficult to completely eliminate them by conventional methods
Therefore, when the roll is grinding, how to eliminate the interference signal from the signal collected by the probe has always puzzled the scientific and technological personnel in the industry

Method used

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  • Method for judging fault and non-fault signals by color codes in on-line fault detection of roll eddy current
  • Method for judging fault and non-fault signals by color codes in on-line fault detection of roll eddy current
  • Method for judging fault and non-fault signals by color codes in on-line fault detection of roll eddy current

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Embodiment Construction

[0038] Such as figure 1 , 2 As shown,

[0039] The process of the method of the present invention is as follows: a. Firstly establish the zone coordinates of the roll surface: divide into m equal parts at equal intervals along the radial direction of the roll, and divide into n equal parts along the axial direction of the roll, and divide the bisectors of m and n The intersecting area, the Vk area in the figure is the coordinate area where the maximum value of the roll surface flaw detection signal is located; b. Set the roll surface grinding rule: make the flaw detection probe and the grinding wheel in the same plane, and the grinding is first , Flaw detection is performed synchronously reciprocatingly along the roller surface afterwards; c. Establish coordinate matrix and corresponding vector graphics: d. Dyeing calibration of signal primitives: e. Color code analysis and judgment.

[0040] Such as image 3 As shown,

[0041] While the roll 1 is rotating, the grinding wheel 2 of t...

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Abstract

The invention provides a method for judging non-fault signals by color codes in on-line fault detection of roll eddy current, which is the continuation of latest cutting-edge technology of simultaneous grinding and detection of rolls. The method comprises the following steps of: (1) dividing division coordinates of a roll surface; (2) setting the grinding regulation of the roll surface; (3) setting a coordinate matrix as well as corresponding vector graphics and signal primitives; (4) performing dyeing calibration on the signal primitives; and (5) analyzing and judging the color codes. The method changes the current situation that all signals obtained by fault detection are taken as crack defect signals for processing and the crack defect signals and non-fault interference signals cannot be distinguished in the prior art, ensures that a field operator can quickly judge the crack defect signals and the non-fault interference signals of the roll surface and define the distribution positions of the crack defect signals of the roll surface so as to rightly grinding the roll surface, not only can completely repair all cracks of the roll surface, eliminate accident potentials, but also prolong the service life of a roll; and the method can distinguish different interference sources according to different characteristics of the non-fault interference signals, and is favorable for adopting measures to eliminate the interference sources existing in working field further to improve working quality and work efficiency.

Description

Technical field [0001] The invention relates to a roll eddy current on-line flaw detection technology, in particular to a method for judging flaw and non- flaw signals by color code in the roll eddy current on-line flaw detection. Background technique [0002] Rolls used by steel mills to roll steel plates must be inspected and repaired regularly, mainly by grinding away the fatigue layer (including cracked layer) on the surface of the roll to restore the material properties of the working layer of the roll for reuse. The current grinding device has realized the on-line edge-grinding probe, this device polishes the cracks that can be detected during the grinding process. Because even the micro cracks that are not visible to the naked eye, if they are not eliminated, will cause the roll to burst and cause a production shutdown. However, this kind of advanced flaw detection method may not detect all "wound signals" because interference will always exist. If the detected and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/91
Inventor 吴一清胡月萍
Owner HUAIAN HAIHONG ELECTRONICS TECH
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