FEATURES OF QUALITY CONTROL OF WELDED STRUCTURES USING THE MATRIX VIRTUAL SENSORS

Yu. A. Gasilo, R. Ya. Romaniuk, O. A. Kriukovska

Abstract


The article is devoted to the analysis of the eddy current method of quality control welded structures using a matrix of sensors, modern devices based on it and determining the prospects for the development of this method in flaw detection.

The main tasks in the application of the eddy current method are: quality control of metals and alloys, semiconductors, electrically conductive rods, plates, sheets, wire; inspection of welding defects, scheduled inspections of welded structures; diagnostics of pipes, fittings, railroad rails, bearing elements, fasteners and many other industrial products.

The control method using the matrix of eddy current sensors is based on electronic control and reading of information from several eddy current sensors located in the form of a matrix on the test object (linear scanning). The matrix of eddy current sensors can be optimized for each specific case by changing the relative position of the individual sensors and the shape of the entire matrix.

The advantages of monitoring with eddy current matrices are as follows: the monitoring time is significantly reduced, a large area is covered in one pass, the design of mechanical and automated scanning systems is simplified, the results of monitoring a given area are provided in real time, the interpretation of data is simplified, and the control reliability and reliability are improved.

The most common application of eddy current testing with matrix transducers is the search and mapping of stress-corrosion lesions in the metal. The development of this type defects is extremely difficult to identify with traditional methods, but they are the cause of numerous accidents on gas pipelines all over the world.

The use of computer equipment in eddy-current systems, which provides both automatic control of the entire measurement cycle and interpretation of the results, opens up great prospects. Well-known companies that manufacture wide range of matrix sensors are Olympus NTD Inc and Eddyfі.

The output of the inspection results is carried out in the form of a C-Scan (2D or 3D), which is a color-coded two- or three-dimensional image of the test surface. It facilitates the analysis of results, which in particular includes measurements of the depth and length defects.

Keywords


vortex control; quality; welded flaw detector; sensor array; C-Scan

References


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DOI: https://doi.org/10.31319/2519-2884.34.2019.10

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Copyright (c) 2019 Yu. A. Gasilo, R. Ya. Romaniuk, O. A. Kriukovska

ISSN (print) 2519-2884

ISSN (online) 2617-8389