SCANNING THERMAL VISION FLAW SCOPE Russian patent published in 2022 - IPC G01N25/72 G01J5/60 

FIELD: materials study.

SUBSTANCE: invention relates to the study of materials, namely, to non-destructive testing of materials and products by the active thermal method and can be used for continuous automated testing of subsurface defects in large-sized flat products made of composite materials and honeycomb structures and related to the aviation, rocket and space industries. The scanning thermal imaging flaw detector contains two stepper motors, which are attached to the inner surface of the cross member connecting the two spars of the supporting U-shaped frame in its front part. On the shafts of stepper motors, passed through the holes in the side members, the drive wheels are fixed. Shafts are fixed on the outer side of each of the spars at an equal distance from the drive wheel and from each other, on which tension rollers and the driven wheel are mounted with the help of bearings. Driving and driven wheels of equal size are provided with protrusions on their generatrix and are located at different ends of the side members, and each pair of driving and driven wheels is fitted with an interference fit by a closed reinforced belt, which has depressions on its inner surface so that the tension rollers placed between them touch the inner surface of the belt, the outer surface of which is in contact with the surface of the test object. A control controller is attached to the cross member of the U-shaped frame, to which stepper motors are connected. A casing in the form of a truncated pyramid is fixed on top of the spars, on the upper surface of which a laser scanning distance meter with a viewing angle of 360° is installed. Inside the casing, guides are installed parallel to its upper surface, on which an optical camera is fixed, the field of view of which is directed to the surface of the test object. A thermal imager is installed on the rails with the possibility of longitudinal movement along them, the field of view of which is directed vertically down to the surface of the test object. An LED backlight source is fixed on the inner side surface of the casing, which is connected to the control controller. A reflector body is attached to the cross member of the U-shaped frame with the help of protruding brackets, inside of which a tubular halogen heating source is installed. Forced cooling fans and a heating control unit connected to each other are fixed on the reflector housing. A thermal imager, an optical camera, a laser scanning distance meter, a control controller and a heating control unit are connected to a computer.

EFFECT: non-destructive automated testing of subsurface defects in large-sized flat products with high performance and reliability.

1 cl, 2 dwg