Method for measuring diameter of high-temperature steel pipe by using image recognition technology

A technology of technical measurement and image recognition, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of extended construction period, high cost, waste of raw materials, etc., and achieve the effect of improving enterprise efficiency, reducing material costs, and reducing labor costs

Active Publication Date: 2012-07-04
TAIYUAN UNIV OF TECH
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Problems solved by technology

Even for the method of measuring the size of steel pipes at high temperatures, the mainstream method requires the use of expensive instruments such as ultrasonic measuring instruments, which is very expensive
[0003] Under the existing technical conditions, the diameter measurement of steel pipes is generally carried out after the steel pipes are cooled, and the measured data is r

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  • Method for measuring diameter of high-temperature steel pipe by using image recognition technology
  • Method for measuring diameter of high-temperature steel pipe by using image recognition technology
  • Method for measuring diameter of high-temperature steel pipe by using image recognition technology

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[0040] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0041] The original measurement system was improved by using a high-temperature-resistant metal ruler, a high-definition camera and a PC. By acquiring the photos of the high-temperature steel pipe and processing the PC as follows: using the grayscale threshold to extract the The part of the high-temperature steel pipe in the image, and then use Gaussian filtering to filter and enhance the image, and then use the SUSAN operator to extract the steel pipe boundary (and its direction) in the image, make a vertical line of the boundary, and then use the measured high-temperature resistant ruler. Calculate the ratio, and finally get the radial length of the steel pipe in the image. Satisfactory results have been obtained through the measurement with traditional measuring tools, and the error is within 0.1mm, so the work efficiency is improved...

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Abstract

The invention discloses a method for measuring the diameter of a high-temperature steel pipe by using an image recognition technology. The method comprises the following steps of: placing a metric scale on the same plane where the steel pipe is located, carrying out image pick-up on the steel pipe by adopting a high-definition camera, obtaining a pixel point ratio of the metric scale to the steel pipe after the image processing carried out by a computer, obtaining the diameter of the steel pipe, and finally calculating to obtain the accurate diameter of the cooled steel pipe by using the scaling coefficient of the cooled steel pipe. The method for measuring the diameter of the high-temperature steel pipe by using the image recognition technology has the characteristics that: the cost is saved and the efficiency is increased.

Description

technical field [0001] The invention relates to the diameter measurement of high-temperature steel pipes, in particular to a method for measuring the diameter of high-temperature steel pipes with image recognition technology. Background technique [0002] At present, the steel pipe is in a high temperature state when it is just out of the furnace. At this time, it is very expensive to measure the diameter of the steel pipe. Now the general measurement method is to measure after the steel pipe is cooled, so if the size of a batch of steel pipes does not meet the specifications, this batch of steel pipes needs to be returned to the furnace for re-smelting. Even in the method of measuring the size of steel pipes at high temperature, the mainstream method is to use expensive instruments such as ultrasonic measuring instruments, which is very expensive. [0003] Under the existing technical conditions, the diameter measurement of the steel pipe is generally carried out after the...

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Application Information

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IPC IPC(8): G01B11/08
Inventor 强彦赵涓涓王高明卢军佐胡桂海王海波彭彦斌王丹王晋
Owner TAIYUAN UNIV OF TECH
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