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Steel pipe contour online measurement method

A measuring method and technology of steel pipes, which are applied to measuring devices, instruments, and optical devices, etc., can solve problems such as errors and achieve the effect of eliminating errors.

Active Publication Date: 2015-12-16
SHENZHEN CHIWAN SEMBAWANG ENG CO LTD
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Problems solved by technology

The advantages of the optical measurement method are fast measurement speed and high precision, but the above three methods all have error problems caused by the deviation of the steel pipe axis without exception.

Method used

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  • Steel pipe contour online measurement method

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Embodiment Construction

[0015] Referring to the accompanying drawings, an embodiment of a steel pipe profile online measurement method according to the present invention is characterized in that it includes the following steps:

[0016] 1. Install two columns 1 and 2 on both sides of the end of the steel pipe at a position larger than the diameter of the steel pipe. Install the first laser displacement sensor 3 and the second laser displacement sensor 4 on the first column 1, and install the third laser displacement sensor on the second column 2. Laser displacement sensor 5 and the 4th laser displacement sensor 6, make four laser displacement sensors can move up and down synchronously, make the first laser displacement sensor 3 and the 4th laser displacement sensor 6 in the described laser displacement sensor be the first group, the second The laser displacement sensor 4 and the third laser displacement sensor 5 are the second group, and the two laser displacement sensors in each group are opposite ac...

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Abstract

A steel pipe contour online measurement method comprises a first step of installing four laser displacement sensors capable of moving up and down synchronously at two sides, whose distance is greater than the diameter of a steel pipe, to an end of the steel pipe, dividing the laser displacement sensors into two groups by taking one laser displacement sensor at one side and one corresponding laser displacement sensor at the other side as a group; a second step of using the two groups of laser displacement sensors for respectively measuring two groups of contour data of the steel pipe; a third step of calculating an included angle between a connecting line of the laser displacement sensors in one group and a radial cross section of the steel pipe based on the two groups of contour data; and a fourth step of performing projection mapping of the above included angle so as to obtain contour data of the radial cross section of the steel pipe. The invention has the advantage of eliminating errors due to axis deviation of the steel pipe.

Description

technical field [0001] The invention relates to a method for measuring contour or curvature, for example measuring shape, especially an online measuring method for steel pipe contour. Background technique [0002] In pressure vessels, wind towers, marine engineering and other fields, large-diameter steel pipes (2000mm~4000mm) are more and more widely used. The construction of large-diameter steel pipes generally requires processes such as rolling, longitudinal seam welding, ring seam lengthening, and welding. The quality of steel pipe rolling will directly affect the difficulty and quality of subsequent welding and assembly. Measuring the profile of the steel pipe can indirectly obtain the circumference and ellipticity of the steel pipe, thereby judging the quality of the steel pipe rolling. [0003] At present, the methods for measuring the profile of steel pipe mainly include manual measurement method, image method, optical measurement method and so on. Manual measureme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 许星蒋军张建萍艾绍武李世森
Owner SHENZHEN CHIWAN SEMBAWANG ENG CO LTD
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