Microwave thermal imaging nondestructive testing system based on matrix decomposition and testing method

Abstract

The invention relates to a microwave thermal imaging nondestructive testing system based on matrix decomposition. The nondestructive testing system comprises a microwave excitation device and a thermal imaging monitoring device, wherein the microwave excitation device comprises a microwave signal generator, a microwave signal amplifier, a microwave excitation sensor and a wave-absorbing material;the thermal imaging monitoring device comprises a thermal imager and a data acquisition and processing device; and the data acquisition and processing device is connected with the microwave signal generator and the thermal imager, so that temperature variation data of a measured objected is obtained. The microwave thermal imaging nondestructive testing system based on the matrix decomposition canbe used for solving the problems that fast imaging and separation are carried out on different types of defects, thermal spatial pattern feature extraction in a defect range is highlighted, an adjacent defect cannot be located and separated due to temperature aliasing and subsurface defect damage area is difficult to quantify effectively; and the problem of automatic separation on defects is solved, and fast imaging can be carried out on impact defect and damage area with different energy.

Description

technical field [0001] The invention relates to a microwave heating-based infrared imaging defect detection system and a detection method thereof, in particular to a matrix decomposition-based microwave thermal imaging nondestructive detection system and a detection method, and belongs to the technical fields of nondestructive detection, medical imaging and target detection. Background technique [0002] Active infrared thermal imaging detection has the advantages of non-contact, intuitive results, large detection area, fast detection speed, sensitivity to layered defects, and depth quantification. Traditional active thermal imaging nondestructive testing mainly uses optical heating, which can only directly heat the surface of the material to be inspected, and the interior needs to be heated by heat conduction. [0003] In recent years, the volume or internal heating method has attracted people's attention, which has given birth to new active thermal imaging detection techno...

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Problems solved by technology

[0006] In order to overcome the problems existing in the prior art, the present invention provides a microwave thermal imaging non-destructive testing system based on matrix decomposition, which can solve the problem of rapid imaging and separation of different types of defects, highlight the feature extraction of thermal spatial patterns in the defect range, and solve the problem of adjacent defects due to Temperature aliasing cannot be located, separated, and the damage area of ​​subsurface defects is difficult to quantify effectively; the problem of automatic separation of defects is solved, and the impact defects and damage areas of different energies can be quickly imaged

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