Ultrasonic flaw detection method for computer-assisted examination

Abstract

The invention discloses an ultrasonic flaw detection method for computer-assisted examination. The ultrasonic flaw detection method comprises the following steps of: 1, modeling through a computer; 2, primarily selecting and scanning parameters; 3, carrying out direct wave scanning simulation; 4, carrying out primary reflected wave scanning simulation; 5, checking an area coverage condition and dynamically adjusting the parameters; and 6, carrying out actual ultrasonic flaw detection. According to the ultrasonic flaw detection method provided by the invention, the simulation states of direct waves and primary reflected wave scanning on a cross section of a welding joint can be directly emerged by using computer simulation; and meanwhile, the simulation conditions can be directly, conveniently and rapidly adjusted through dynamic real-time adjustment of a region, so that the examination and parameter adjustment efficiencies can be effectively improved. The ultrasonic flaw detection method provided by the invention can scan based on an optimal K value and flexibly adjust other parameters, so that an optimal ultrasonic image is obtained, and the flaw detection quality is ensured.

Description

technical field [0001] The invention relates to the technical field of ultrasonic flaw detection, in particular to a computer-aided ultrasonic flaw detection method. Background technique [0002] At present, the basic method used in the ultrasonic flaw detection of flat butt welded joints is to scan the entire welded joint twice by using the refracted shear wave generated by the K value probe after direct contact with the steel plate on both sides of the weld, that is, the direct wave scan Scan with a reflected wave to detect weld defects in welded joints. The current practice in the project is to select a probe with an appropriate K value according to the standard "JB / T4730.3-2005 Nondestructive Testing of Pressure Equipment Part 3: Ultrasonic Testing" according to the thickness t of the steel plate of the welded joint to be tested, and to determine the direct wave sweep Check the probe movement distance D1 and the probe movement distance D2 of a reflected wave scan, and t...

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Problems solved by technology

[0004] In view of the shortcomings of the above-mentioned existing ultrasonic flaw detection according to the table, there may be unrecognizable missed detection and poor quality, the applicant provides an ultrasonic flaw detection method with computer-aided verification, so that the predetermined value can be checked and compared. Optimize and guide flaw detection operations to avoid missed inspections

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