Ultrasonic sweep welding seam tracking system and method

Abstract

The invention relates to an ultrasonic swung-sweep seam tracking system and an ultrasonic swung-sweep seam tracking method. The system mainly comprises an automatic swung-sweep mechanical subsystem and a data acquisition subsystem, wherein the data acquisition subsystem is composed of an ultrasonic signal acquisition part and a computer. The system is characterized in that the ultrasonic signal acquisition part is used for acquiring signals of an ultrasonic probe of the automatic swung-sweep mechanical subsystem and transmitting the signals to the computer, and the computer is used for controlling a servo motor of the automatic swung-sweep mechanical subsystem and a water drum lifting cylinder, and recording the position signal of an encoder. Circulating swung-sweep is performed parallel to a tube body by using the ultrasonic straight probe in the invention, and the ultrasonic bottom echo reflected signal amplitude is changed by using inner burrs left on the welding reverse-side of seams so as to identify the centers of the seams.

Description

technical field [0001] The invention relates to the field of automatic tracking of weld seams when performing non-destructive testing on weld seams of steel pipes, in particular to a system and method for real-time tracking and positioning of weld seams using ultrasonic waves. Background technique [0002] At present, the known seam tracking mainly involves an image recognition method to identify the reinforcement or color of the seam to realize the tracking and positioning of the seam. The identification of weld reinforcement is mainly through laser tracking. The linear laser shot by the laser is used to produce deformation on the weld with a certain reinforcement. The deformation image collected by the camera is used to identify the relative position information of the weld to track the center of the weld. , but the welding seam tracked by this method must have a certain reinforcement and is easily disturbed by light; the color recognition method of the weld seam is to ins...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the limitations of the existing welding seam laser tracking and line drawing tracking in the process of using image recognition, the object of the present invention is to provide an ultrasonic swing sweep welding seam tracking system and method. There is no tracking defect in the welding seam without reinforcement or the reinforcement is less than 0.5mm, and at the same time, the quenching process cannot realize the line drawing function

Images