CN103399037A - Active infrared tube defect detection method based on electromagnetic induction heating - Google Patents
Active infrared tube defect detection method based on electromagnetic induction heating Download PDFInfo
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- CN103399037A CN103399037A CN2013103421135A CN201310342113A CN103399037A CN 103399037 A CN103399037 A CN 103399037A CN 2013103421135 A CN2013103421135 A CN 2013103421135A CN 201310342113 A CN201310342113 A CN 201310342113A CN 103399037 A CN103399037 A CN 103399037A
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Abstract
The invention relates to an active infrared tube defect detection method based on electromagnetic induction heating. The method is characterized in that stranded wire is uniformly wound on one end of a ferromagnetic bar so as to form a coil; the other end of the ferromagnetic bar penetrates a tube to be detected; two ends of the rod are clamped by using ferromagnetic fixtures, such that a closed magnetic yoke is formed; high-frequency current is conducted on two joints of the coil for carrying out electromagnetic induction heating; during heating, two thermal infrared imagers are arranged on two sides of the tube with an included angle of 180 DEG, such that changes of surface temperature distribution characteristics with time can be observed, and tube defect can be detected. The method has the advantages of low heating device cost, simple structure, uniform heating, and high efficiency. With the method, surface and internal defects such as corrosion cracks, impurities, pores, and the like can be well detected from tube surface temperature distribution characteristics.
Description
Technical field
The present invention relates to a kind of tubing Infrared Non-destructive Testing method, relate in particular to a kind of detection method of active infra-red based on electromagnetic induction heating.
Background technology
At present, utilizing during the active infra-red Dynamic Non-Destruction Measurement carries out the detection of tubing defect, many employing flashlamp, high-frequency mechanical vibration, steam etc. are treated detected object and are carried out thermal excitation, by thing surface temperature distribution characteristic temporal evolution situation to be checked, detect inherent vice.Yet utilize flashlamp and steam easily to produce the heating uneven phenomenon to the tubing heating, affect testing result, high-frequency mechanical vibration is only applicable to again the detection of crack defect.The deficiency that exists while being used for the tubing infrared detection method for existing energisation mode, this patent has proposed AC power is accessed on the coil on the ferromagnetism bar after by frequency converter again, the magnetic flux that changes by high speed can make in tubing and produce the eddy current that the effect of heating is arranged, thereby tubing is realized efficiently and heating equably, and then utilized thermal imaging system to observe tubing surface temperature distribution characteristic to reach the detection effect of tube surfaces and inherent vice more accurately.
Summary of the invention
The object of the present invention is to provide the required exciting bank based on electromagnetic induction heating of a kind of tubing infrared detection, to solve existing thermal excitation mode existing problem when heating tubing, and then observe tubing surface temperature distribution characteristic in order to detect more accurately the defect in tubing by thermal imaging system.
The present invention is achieved like this, and it is characterized in that the stranded enameled wire of an end uniform winding at the ferromagnetism bar, and the other end passes tubing to be detected, then utilizes ferromagnetism clamp clamps bar two ends to form closed yoke.Utilize frequency converter by the magnetic flux that changes to produce high speed on switch-on coil after the AC power high frequency, thereby the magnetic flux that changes at a high speed can produce eddy current in tubing causes the body heating, the position heat production rate difference that magnetic permeability is different, be placed in the tubing both sides in order to observe its surface temperature distribution characteristic over time by two thermal infrared imagers with 180 degree angles simultaneously logical electrically heated.
Advantage of the present invention is: the heating arrangement cost is low, simple in structure, and homogeneous heating, efficiency are high, can be well from corrosion cracking the tube surfaces temperature distributing characteristic, being detected, be mingled with, surface and the inherent vice such as pore.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and Fig. 2 is that tubing is observed sectional view
In the drawings, 1. AC power, 2. frequency converter, 3. control circuit, 4. holding circuit; 5. stranded enameled wire, 6. ferromagnetism bar, 7. ferromagnetism fixture, 8. metal tube; 9. the nonmagnetic insulation material of high temperature resistant plastic cement, 10. thermal infrared imager, 11. Internet Transmission casees, 12. computing machines.
Embodiment
As shown in Figure 1, the present invention is achieved in that AC power 1 access frequency converter 2, it is uprised frequently by low frequency; Control circuit 3 and frequency converter 2 are connected to play to the effect of on-off circuit, self-verifying, holding circuit 4 is connected with frequency converter 2 and plays maximum current limit, mistake or under-voltage protection effect.Using stranded enameled wire 5 uniform winding at an end of ferromagnetism bar 6 as coil, the other end of ferromagnetism bar 6 passes metal tube 8 and makes on its central axis that is fixed on metal tube 8 with the nonmagnetic insulation material 9 of high temperature resistant plastic cement, utilizes ferromagnetism fixture 7 to clamp two ends that ferromagnetism bar 6 exposes to form closed yoke.Two interfaces of stranded enameled wire 5 are connected with frequency converter 2 high-frequency electrical out, in closed magnetic yoke magnetic bar 6 parts, quick variation magnetic field can make in metal tube 8 and produce the eddy current that the pressure heat effect is arranged so, the eddy current that in tubing, the different material of magnetic permeability causes is also different, so the relevant position temperature is also just different.Energising is carried out, in the electromagnetic induction heating process, two thermal infrared imagers 10 are observed to its surface temperature distribution characteristic over time with the both sides that 180 degree angles are placed in metal tube 8, simultaneously computing machine 12 is connected with thermal infrared imager 10 in order to it is carried out to Long-distance Control by Internet Transmission case 11, also can utilizes in addition the special software on computing machine 12 to carry out heat analysis in real time to the thermography that gathers.Because fast-changing magnetic field can not make corrosion cracking space and pore or white point, produce electromagnetic induction, appropriate section just not there will be electromagnetic induction heat production phenomenon yet, and what the temperature on so corresponding surface can be than the intact zone of periphery is low; For inclusion defect, if inclusion material is higher than the magnetic permeability of tubing, the temperature of respective surfaces is higher than periphery so, otherwise low.By above characteristic, but the different defect of tubing.
Claims (1)
1. infrared detection method of the tubing based on the electromagnetic induction heating energisation mode, the method based on system and device comprise frequency converter, control circuit, holding circuit, coil, the ferromagnetism bar, the ferromagnetism fixture, thermal infrared imager, the Internet Transmission case, computing machine, it is characterized in that forming coil at the stranded enameled wire of an end uniform winding of ferromagnetism bar, the other end passes tubing to be detected, then utilize ferromagnetism clamp clamps bar two ends to form closed yoke, logical high-frequency current is to produce the magnetic flux that changes at a high speed on coil, the magnetic flux that changes at a high speed makes in tubing and produces the eddy current that the effect of heating is arranged, the position heat production rate difference that magnetic permeability is different, in the time of heating, two thermal infrared imagers are placed in to the tubing both sides in order to observe its surface temperature distribution characteristic over time in order to survey the defect of tubing with 180 degree angles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310342113.5A CN103399037B (en) | 2013-08-08 | 2013-08-08 | Active infra-red tubing defect inspection method based on electromagnetic induction heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310342113.5A CN103399037B (en) | 2013-08-08 | 2013-08-08 | Active infra-red tubing defect inspection method based on electromagnetic induction heating |
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| Publication Number | Publication Date |
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| CN103399037A true CN103399037A (en) | 2013-11-20 |
| CN103399037B CN103399037B (en) | 2016-05-18 |
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| CN201310342113.5A Expired - Fee Related CN103399037B (en) | 2013-08-08 | 2013-08-08 | Active infra-red tubing defect inspection method based on electromagnetic induction heating |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940852A (en) * | 2014-04-17 | 2014-07-23 | 江苏理工学院 | Magnetically sealed electromagnetism thermal excitation conductor defect detection device capable of magnetizing and detection method |
| CN106404837A (en) * | 2016-10-26 | 2017-02-15 | 王琪 | Method for detecting cable aging position based on infrared imaging and temperature detection |
| CN106442627A (en) * | 2016-10-26 | 2017-02-22 | 王琪 | Detecting device for aging position of cable based on infrared imaging and temperature detection |
| CN106501307A (en) * | 2016-10-26 | 2017-03-15 | 王琪 | A kind of aging method for detecting position of the cable based on temperature transfer law |
| CN106546625A (en) * | 2016-10-26 | 2017-03-29 | 王琪 | Based on the aging position infrared detection method of cable that heat conductivility is detected |
| CN106643486A (en) * | 2016-10-26 | 2017-05-10 | 王琪 | Cable aging position detection device based on temperature transfer law |
| CN106841306A (en) * | 2017-03-20 | 2017-06-13 | 四川大学 | A kind of inductive loop thermal imaging detection means based on rotating excitation field |
| CN107941855A (en) * | 2017-11-22 | 2018-04-20 | 四川大学 | A kind of pipe end thermal imaging detection device based on permanent magnet rotary heating |
| CN108430125A (en) * | 2018-03-09 | 2018-08-21 | 广州供电局有限公司 | A kind of non-contact nonstorage calorifier of distribution transformer terminal high frequency and method |
| CN108562614A (en) * | 2018-01-25 | 2018-09-21 | 福建师范大学福清分校 | A kind of chip pin weld defects detection system and method based on thermal imaging detection |
| CN108982584A (en) * | 2018-07-11 | 2018-12-11 | 辽宁嘉顺化工科技有限公司 | Electric heating tube internal oxidition magnesium uniformity detection system and method |
| CN110095502A (en) * | 2019-05-13 | 2019-08-06 | 合肥工业大学 | A kind of transmitting electromagnetism or microwave carry out the device of infrared road disease non-destructive testing |
| CN111157577A (en) * | 2020-02-13 | 2020-05-15 | 四川大学 | Steel pipe magnetization eddy current thermal imaging defect detection device |
| CN111398352A (en) * | 2020-04-07 | 2020-07-10 | 四川沐迪圣科技有限公司 | Dynamic nondestructive testing system based on electromagnetic-thermal multi-physical-field fusion coil |
| CN113390123A (en) * | 2021-06-04 | 2021-09-14 | 南京邮电大学 | Heat storage electric heating device adopting power frequency induction heating and manufacturing method |
| CN113740380A (en) * | 2021-08-17 | 2021-12-03 | 华中科技大学 | Crack magnetic powder detection method based on temperature difference |
| CN117269563A (en) * | 2023-11-22 | 2023-12-22 | 山东联创高科自动化有限公司 | Fan frequency converter detection device |
| CN117291459A (en) * | 2023-09-11 | 2023-12-26 | 广东新亚光电缆股份有限公司 | Protective sleeve quality analysis system for insulated connection flexible wires |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103940852A (en) * | 2014-04-17 | 2014-07-23 | 江苏理工学院 | Magnetically sealed electromagnetism thermal excitation conductor defect detection device capable of magnetizing and detection method |
| CN106546625A (en) * | 2016-10-26 | 2017-03-29 | 王琪 | Based on the aging position infrared detection method of cable that heat conductivility is detected |
| CN106404837A (en) * | 2016-10-26 | 2017-02-15 | 王琪 | Method for detecting cable aging position based on infrared imaging and temperature detection |
| CN106501307A (en) * | 2016-10-26 | 2017-03-15 | 王琪 | A kind of aging method for detecting position of the cable based on temperature transfer law |
| CN106442627B (en) * | 2016-10-26 | 2019-06-14 | 盐池县惠泽农机作业有限公司 | Cable aging position detecting device based on infrared imaging and temperature detection |
| CN106643486B (en) * | 2016-10-26 | 2019-06-14 | 盐池县惠泽农机作业有限公司 | A kind of cable aging position detecting device based on temperature transfer law |
| CN106546625B (en) * | 2016-10-26 | 2019-02-22 | 江苏未来智慧信息科技有限公司 | Cable aging position infrared detection method based on heating conduction detection |
| CN106442627A (en) * | 2016-10-26 | 2017-02-22 | 王琪 | Detecting device for aging position of cable based on infrared imaging and temperature detection |
| CN106501307B (en) * | 2016-10-26 | 2019-02-22 | 江苏未来智慧信息科技有限公司 | A kind of cable aging method for detecting position based on temperature transfer law |
| CN106643486A (en) * | 2016-10-26 | 2017-05-10 | 王琪 | Cable aging position detection device based on temperature transfer law |
| CN109115832B (en) * | 2016-10-26 | 2019-10-18 | 广州市兆能有限公司 | A kind of cable aging lateral position detection method |
| CN108982591A (en) * | 2016-10-26 | 2018-12-11 | 王琪 | cable aging axial position detection method |
| CN109115832A (en) * | 2016-10-26 | 2019-01-01 | 王琪 | A kind of cable aging lateral position detection method |
| CN106404837B (en) * | 2016-10-26 | 2019-02-05 | 湖南力通恒裕电缆科技有限公司 | Cable aging method for detecting position based on infrared imaging and temperature detection |
| CN106841306A (en) * | 2017-03-20 | 2017-06-13 | 四川大学 | A kind of inductive loop thermal imaging detection means based on rotating excitation field |
| CN107941855A (en) * | 2017-11-22 | 2018-04-20 | 四川大学 | A kind of pipe end thermal imaging detection device based on permanent magnet rotary heating |
| CN108562614A (en) * | 2018-01-25 | 2018-09-21 | 福建师范大学福清分校 | A kind of chip pin weld defects detection system and method based on thermal imaging detection |
| CN108430125A (en) * | 2018-03-09 | 2018-08-21 | 广州供电局有限公司 | A kind of non-contact nonstorage calorifier of distribution transformer terminal high frequency and method |
| CN108982584A (en) * | 2018-07-11 | 2018-12-11 | 辽宁嘉顺化工科技有限公司 | Electric heating tube internal oxidition magnesium uniformity detection system and method |
| CN108982584B (en) * | 2018-07-11 | 2020-11-06 | 辽宁嘉顺化工科技有限公司 | System and method for detecting uniformity of magnesium oxide in electric heating pipe |
| CN110095502B (en) * | 2019-05-13 | 2021-10-22 | 合肥工业大学 | Device for carrying out infrared road disease nondestructive testing by transmitting electromagnetism or microwaves |
| CN110095502A (en) * | 2019-05-13 | 2019-08-06 | 合肥工业大学 | A kind of transmitting electromagnetism or microwave carry out the device of infrared road disease non-destructive testing |
| CN111157577A (en) * | 2020-02-13 | 2020-05-15 | 四川大学 | Steel pipe magnetization eddy current thermal imaging defect detection device |
| CN111398352A (en) * | 2020-04-07 | 2020-07-10 | 四川沐迪圣科技有限公司 | Dynamic nondestructive testing system based on electromagnetic-thermal multi-physical-field fusion coil |
| CN111398352B (en) * | 2020-04-07 | 2022-11-22 | 四川沐迪圣科技有限公司 | Dynamic nondestructive testing system based on electromagnetic-thermal multi-physical-field fusion coil |
| CN113390123A (en) * | 2021-06-04 | 2021-09-14 | 南京邮电大学 | Heat storage electric heating device adopting power frequency induction heating and manufacturing method |
| CN113740380A (en) * | 2021-08-17 | 2021-12-03 | 华中科技大学 | Crack magnetic powder detection method based on temperature difference |
| CN113740380B (en) * | 2021-08-17 | 2022-07-12 | 华中科技大学 | Crack magnetic powder detection method based on temperature difference |
| CN117291459A (en) * | 2023-09-11 | 2023-12-26 | 广东新亚光电缆股份有限公司 | Protective sleeve quality analysis system for insulated connection flexible wires |
| CN117291459B (en) * | 2023-09-11 | 2024-02-23 | 广东新亚光电缆股份有限公司 | Protective sleeve quality analysis system for insulated connection flexible wires |
| CN117269563A (en) * | 2023-11-22 | 2023-12-22 | 山东联创高科自动化有限公司 | Fan frequency converter detection device |
| CN117269563B (en) * | 2023-11-22 | 2024-01-23 | 山东联创高科自动化有限公司 | Fan frequency converter detection device |
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