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Apparatus and method for on-line detecting welding part of strip

A detection method and measurement device technology, applied in the direction of measurement devices, welding equipment, analysis materials, etc., can solve the problems of short light source life, difficult installation of light detection system, dust or foreign matter pollution, etc., to improve production efficiency, and accuracy In-line detection and resolution of scratches and chipping effects

Active Publication Date: 2009-04-22
POSCO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This light source has a very short life and therefore needs to be replaced periodically
Since the light detector 4 is installed under the steel strip 1 to detect the light passing through the hole 5, the light detection system is difficult to install and is easily contaminated by falling dust or foreign matter.

Method used

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  • Apparatus and method for on-line detecting welding part of strip
  • Apparatus and method for on-line detecting welding part of strip
  • Apparatus and method for on-line detecting welding part of strip

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Embodiment Construction

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0034] figure 2 The schematic diagram of the structure describes an online detection system for steel strip welds according to a specific embodiment of the present invention.

[0035] see figure 2 , the online detection system 100 for steel strip welds of the present invention includes a laser reflectance measurement device 110 and a signal processing device 120 . Although only one laser reflectance measuring device 110 is shown in the figure, this is only an exemplary embodiment of the present invention. In another specific embodiment of the present invention, two or more laser reflectance measuring devices may be provided according to the width of the steel strip 1 .

[0036] The laser reflectance measuring device continuously emits a laser beam onto the moving steel strip in conveyance, and continuously measures the reflectivity ...

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Abstract

Provided is an on-line detection system and method for a weld of a steel strip, which can emit a laser beam onto the surface of a steel strip moving at a high speed and measure the reflectivity of the laser beam reflecting from the same, thereby detecting the weld of the steel strip easily on-line. In the on-line detection system, reflectivity measuring means emits a laser beam onto a moving steel strip and continuously measuring the reflectivity of the laser beam returning from the surface of the steel strip, and signal processing means detects a weld of the steel strip based on change in the reflectivity measured on the weld.

Description

technical field [0001] The present invention relates to an online detection system and method for steel strip welds, especially it scans a laser beam onto a high-speed moving steel strip, and locates the steel strip weld on-line based on the reflectivity of the laser beam reflected back from the steel strip. seam. Background technique [0002] Usually, in the cold rolling process of steel rolling mills, in the initial step of cold rolling, unit steel coils are welded together into strips for continuous rolling, and in the finishing step of rolling, the steel The strip is slit along the weld into unit coils, which are then conveyed for subsequent processing or shipped as a final product. Therefore, in the cold rolling process, it is unavoidable to locate such weld seams in order to automatically and precisely control key processing equipment, and to cut the steel strip along the weld seam into unit steel coils at the output end. [0003] figure 1 It is a steel strip weld d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/47
CPCG01N21/55G01N2021/8918G01N21/89G01N21/47B23K31/12
Inventor 林忠洙孙基三孙光虎李常镇崔承甲吴基庄
Owner POSCO CO LTD
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