Eddy current heating type pipeline defect infrared imaging testing device and test method

An infrared imaging and detection device technology, which is applied in measurement devices, electrical radiation detectors, material analysis by optical means, etc., can solve problems such as pipe magnetization, and achieve the effects of short heating time, easy hand-held operation, and light weight

Inactive Publication Date: 2016-03-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[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 t

Method used

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  • Eddy current heating type pipeline defect infrared imaging testing device and test method
  • Eddy current heating type pipeline defect infrared imaging testing device and test method
  • Eddy current heating type pipeline defect infrared imaging testing device and test method

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Embodiment

[0035] Embodiment: The present invention is funded by the National Natural Science Foundation of China (51365019), and the following eddy current heating type pipeline defect infrared imaging detection device has been designed, and the image of the buried pipeline is detected using this device and auxiliary laser point imaging technology For detection and calibration and its calibration method, 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 4 drive the left and right connecting rods 7 and 6 to rotate clockwise 90 degrees, as figure 2 shown. At this time, the eddy current heating probe 8 is facing the measured object 14, and uses the principle of electromagnetic induction heating to heat the measured object 14 in a non-contact manner. When the measured object 14 is in this magnetic field, the ...

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Abstract

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 non-destructive detection system for pipe walls with infrared thermal imaging technology, in particular to a non-destructive detection system for internal defects of pipes that can be used in conjunction with a pipe detection robot and adopts non-contact active local micro-heating infrared imaging technology, and belongs to the field of non-destructive detection. Background technique [0002] Most of the buried pipelines transporting oil and gas medium are steel structure pipelines, which may cause medium leakage accidents due to corrosion, aging or damage. Therefore, during the operation of buried oil and gas pipelines, in addition to regular inspections based on manual experience, real-time online Inspection to timely locate and repair the dangerous areas where the pipeline has leaked or may leak, so as to ensure the safe operation of buried pipelines. Due to the particularity of buried pipelines, at present, the technical ...

Claims

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Application Information

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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
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