An eddy current heating type infrared imaging detection device and detection method for pipeline defects
An infrared imaging and detection device technology, which is applied in the field of non-destructive detection systems for internal defects of pipes and non-destructive detection systems for pipe walls with infrared thermal imaging technology, can solve problems such as pipe magnetization, and achieve short heating time, easy handheld operation, and low power consumption. Effect
Inactive Publication Date: 2018-04-06
KUNMING UNIV OF SCI & TECH
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[0005] The first purpose of the present invention is to provide a structure for the deficiencies of the existing pipeline internal defect detection technology, such as the magnetization of the pipeline, the need for couplant to transmit the ultrasonic energy emitted by the piezoelectric probe to the surface of the pipeline to be tested, etc. Simple, low cost, easy to use, a pipeline defect detection device designed according to the characteristics of pipeline defect detection requirements using the principle of infrared thermal imaging
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[0035] Example: This invention is funded by the National Natural Science Foundation of China (51365019). The following eddy current-heated infrared imaging detection device for pipeline defects has been designed and completed, and the image of underground pipeline detection using this device and auxiliary laser point imaging technology For detection, calibration and calibration methods, the eddy current heating probe 8 is connected to the left and right steering gears 5, 4 through the left and right connecting rods 7, 6. When heating is required, the control module 12 controls the left and right steering gears 5, 4 Drive the left and right connecting rods 7, 6 to rotate 90 degrees clockwise, such as figure 2 Shown. At this time, the eddy current heating probe 8 is facing the object 14 to be measured, and the principle of electromagnetic induction heating is used to heat the object 14 in a non-contact manner. That is, the two ends of the coil of the eddy current heating probe 8 ...
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An eddy current heating type pipeline defect infrared imaging testing device and a test method belong to the field of nondestructive testing. The device is composed of an induction heating unit, an image acquisition unit and an image processing unit. A measured buried pipeline undergoes non-contact local micro-heating by the utilization of an eddy current heating probe of the induction heating unit, the buried pipeline will generate eddy current to heat pipe wall and radiate outwards infrared rays. Under the assistance of an infrared laser pointer, an infrared thermal imager is directed at the measured pipeline to carry out image acquisition. Information of the acquired images is transmitted to a computer through an image transmission interface. After the image information is processed by the computer, whether the measured pipeline has defects and defect shape and actual size are calibrated. The invention is funded by the program of National Natural Science Foundation of China (51365019). The testing device can be cooperatively used along with a pipeline detection robot and is used for real-time online detection of steel structural buried pipelines.
Description
Technical field [0001] The invention relates to a pipe wall nondestructive inspection system with infrared thermal imaging technology, in particular to a pipe internal defect nondestructive inspection system which can be used in conjunction with a pipe inspection robot and adopts non-contact active local micro-heating infrared imaging technology, belonging to the field of nondestructive inspection. Background technique [0002] Buried pipelines that transport oil and gas media are mostly steel structured pipelines, which can cause media leakage accidents due to corrosion, aging or damage. Therefore, in addition to regular inspections based on manual experience, buried oil and gas pipelines need to be online in real time during operation. Check to locate and repair the dangerous areas where the pipeline has leaked or may leak in time to ensure the safe operation of buried pipelines. Due to the particularity of buried pipelines, at present, the technical means for real-time online ...
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IPC IPC(8): G01N21/954G01J5/10
Inventor 张云伟樊阳阳王卓苟爽喻勇
Owner KUNMING UNIV OF SCI & TECH