Method for monitoring running speed of steel pipe

Abstract

The invention provides a method for monitoring a running speed of a steel pipe. The method comprises the steps of taking a photo of the steel pipe with a CCD (Charge Coupled Device) camera at a predetermined time interval and consequently, obtaining an image sequence of equal time interval, performing median filtering on images in the image sequence, performing Gamma transformation on the median-filtered images to remove the background, calibrating the images, determining edges by virtue of an edge tracking algorithm, calculating an actual distance by which the steel pipe moves according to image calibration and edge detection, and performing curve fitting on the distance data by the least square method to obtain the slope of a straight line, namely, the moving speed of the steel pipe. The method is better than the traditional contact and non-contact speed measurement methods, and also well applicable to the severe environment in an industrial field, and furthermore, the measurement accuracy is improved and lots of manpower and material resources are saved.

Description

Technical field [0001] The invention relates to the field of industrial technology, in particular to a method for monitoring the running speed of steel pipes. Background technique [0002] 3PE anti-corrosion can make the life of buried pipelines reach 50 years. It is currently regarded as the most advanced external pipeline anti-corrosion technology in the world, and it has become the development direction of pipeline external anti-corrosion coatings in the future. In the industrial production process, it is often necessary to accurately measure the speed of a moving target. In the process of 3PE anti-corrosion treatment of steel pipes, the moving speed of steel pipes directly affects the output and efficiency of the production line; and the precise measurement of the moving speed of steel pipes also realizes the true closed-loop control of the transmission system, thus ensuring the anti-corrosion production system of 3PE steel pipes. High speed and stable operation. [0003] Wit...

AI Technical Summary

Problems solved by technology

In the process of 3PE anti-corrosion production, electric fields, dust, high-frequency noise, etc. will be generated on the industrial site, which will affect the accuracy of laser speed measurement, and there are threads on the steel pipe body, which will seriously affect the laser speed measurement.

The existing speed measurement method is no longer suitable for the anti-corrosion environment, so a non-contact speed measurement system based on industrial CCD for 3PE anti-corrosion process steel pipes was invented. The speed measurement system has strong anti-interference and high measurement accuracy, and can be effectively used in harsh environments industrial site

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