A method for extracting three-dimensional parameters of internal defects of parts based on ultrasonic phased array

Abstract

An ultrasonic phased array based method for extracting three-dimensional parameters of inner defects of a component is disclosed. The method includes detecting a component to be detected according tothe shape and size of the component, detecting inner defects of the component through moving a probe, displaying the inner defects in an ultrasonic phased array instrument, then storing data, acquiring section images corresponding to the inner defects of the component to be detected, then performing data storage through image information mainly including S-displayed images, subjecting collected defect display images to image processing, acquiring centers of mass of the processed defect section images, pointing positions of the centers of mass, calculating the area of the defects in each section image, replacing each complex-shape defect with a circle having the same area to perform area equivalent treatment on all images, reconstructing a three-dimensional defect model, and calculating three-dimensional parameters of the reconstructed inner defects of the component, with the three-dimensional parameters reflecting the inner structure of the component. The method is low in cost and lowin consumed time, devices are simple and easy to carry, and online detection can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of industrial ultrasonic nondestructive testing, and specifically relates to a method for extracting three-dimensional parameters of internal defects of parts based on an ultrasonic phased array. Background technique [0002] In the industrial field, on the one hand, large-scale equipment usually works in harsh environments such as high temperature, strong pressure, and heavy load. Such a working environment is prone to fatigue damage, corrosion, burns, cracks and other defects of various degrees, which greatly affects the components. The normal operation of the equipment, even directly causing irreparable damage to the equipment, greatly affects the production efficiency of the industry, and at the same time, it is also a hidden danger to the personal safety of the technicians; on the other hand, in high temperature, strong pressure, heavy load, etc. Parts that work in cycles under severe conditions are prone to...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for extracting three-dimensional parameters of internal defects of parts based on ultrasonic phased array, which solves the problem of large-scale equipment in the current industrial field, such as gas turbine engine rotors and rotors. There are many problems such as difficulty in extracting three-dimensional parameters of internal defects, insufficient reliability, and immature methods for parts such as blades, pressure vessels, and oil pipelines.

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