Nondestructive detecting system and method for automatic tracking thermal wave imaging

A non-destructive testing and imaging technology, which is applied in the online non-destructive testing system of thermal excitation infrared thermal wave imaging to detect objects in a non-stationary state, and can solve problems that affect the effective detection of the measured object

Inactive Publication Date: 2013-06-12
NANJING NOVEL PHOTOELECTRIC SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Especially in the case of outdoor service, such as the blades installed on the wind turbine, even under the condition of bra

Method used

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  • Nondestructive detecting system and method for automatic tracking thermal wave imaging
  • Nondestructive detecting system and method for automatic tracking thermal wave imaging
  • Nondestructive detecting system and method for automatic tracking thermal wave imaging

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Experimental program
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Effect test

Embodiment 1

[0021] Such as figure 2 As shown, the system of the present invention includes a laser generator 29, a laser projection head 27, an infrared camera 25, a visible light camera 26, a pan-tilt 23 capable of horizontal rotation and pitch adjustment, a pan-tilt controller 31, a data acquisition processor 32, and the like. Wherein the laser projection head 27 , the infrared camera 25 and the visible light camera 26 constitute the optical detection module 24 of the system, and are connected to the supporting frame 21 through the pan-tilt 23 .

[0022] Such as figure 2 As shown, the laser generator 29 is used to heat the measured object, the laser beam is transmitted to the system optical detection module 24 through the optical fiber 28, and the beam is projected from the laser projection head 27 to the measured object after shaping. The infrared camera 25 is used to receive the infrared signal radiated from the measured object, and transmit the image to the data acquisition proces...

Embodiment 2

[0032] The design solution in Embodiment 1 has the advantage of a large tracking range, but the volume and weight of the optical detection module 24 are relatively large, which makes the pan-tilt automatic tracking system more complex and bulky. For the case where the moving range of the measured object is small, that is, when the measured part will not move out of the imaging range of the camera, the infrared camera and the visible light camera can be in a non-tracking state. Great simplification. Due to the limited power of the thermal excitation source, the laser beam still needs to be tracked, but the deflection of the beam is easy to achieve mechanically.

[0033] Such as Figure 4 As shown, the system omits the automatic tracking pan-tilt and its controller, and adopts the laser beam deflection device 29. Under the control of the data acquisition processor 32, the outgoing direction of the laser beam 33 can be deflected, so that the heating part remains at the measured ...

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Abstract

The invention relates to an on-line nondestructive detecting system for thermal excitation infrared imaging, and the system is used for detecting the internal defects and structures of various metal and non-metal materials. The system comprises an infrared thermal imager, a thermal excitation source, a visible light camera, an automatic fine control cradle head, a control system and a data processor. The system has a function of automatically tracking and locking a detected object, and is applicable applied to the infrared thermal wave nondestructive detection of an object at a nonstatic state.

Description

technical field [0001] The invention relates to an online non-destructive testing system for thermal excitation infrared thermal wave imaging, which is used to detect internal defects and structures of various metal and non-metallic materials. The object belongs to the technical field of infrared non-destructive testing. Background technique [0002] With the rapid development of new materials and new technologies, the demand for various new non-destructive testing technologies is also growing rapidly. For example, in the aerospace field, the application of composite materials has become one of the important symbols of the advanced equipment in the modern aerospace field. With the application of various special metal materials and composite materials in the fuselage, wings, turbine blades, rocket shells, aeroengine nozzles, turbine blades and fuselage structures, the requirements for non-destructive testing are gradually increasing. The application of composite materials i...

Claims

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Application Information

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IPC IPC(8): G01N25/72
Inventor 陈力宋扬民
Owner NANJING NOVEL PHOTOELECTRIC SYST
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