CN101587096B - Method for nondestructive examination of oxide thickness distribution in stainless steel tubes - Google Patents
Method for nondestructive examination of oxide thickness distribution in stainless steel tubes Download PDFInfo
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- CN101587096B CN101587096B CN2009101113006A CN200910111300A CN101587096B CN 101587096 B CN101587096 B CN 101587096B CN 2009101113006 A CN2009101113006 A CN 2009101113006A CN 200910111300 A CN200910111300 A CN 200910111300A CN 101587096 B CN101587096 B CN 101587096B
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Abstract
The invention discloses a method for nondestructive examination of oxide thickness distribution in stainless steel tubes, vortex flow transducer is sticked on external wall of bend section in stainless steel tubes, motivated by a multi-frequency signal, vortex flow sensing signal is obtained by the vortex flow transducer, the signal is processed by a computer processing system into data in correspondence position corresponding to oxide thickness of bend section in stainless steel tubes after signal amplification, phase sensitive detection and frequency mixing of interference signals, whole perisporium of the stainless tube is detected by surrounding, a plurality of data in a plurality of positions correspondinig to oxide thickness of bend section in stainless steel tube to be tested is obtained, the computer processing system proceeds imaging treatment according to data of oxide thickness corresponding to stainless steel tubes, images corresponding to stainless steel tubes for mapping oxide vortex flow sensing signals are obtained; and then a pseudo-three-dimensional image corresponding to shape of stainless steel tube is obtained, and oxide distribution conditioin inside the stainless steel is displayed.
Description
Technical field
The present invention relates to a kind of lossless detection method, particularly relate to a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing.
Background technology
Non-Destructive Testing NDT (nondestructive test) implements a kind of detection means of not damaging or not influencing its following usability or purposes to material or workpiece, by using NDT, can find the inner and surperficial existing defective of material or workpiece, the geometric properties of energy measurement workpiece and size can be measured inside composition, structure, physical property and the state etc. of material or workpiece.Dynamic Non-Destruction Measurement now has been widely used in each industrial circle, in manufacturing industry, space flight and aviation, field of petrochemical industry.
Stainless-steel tube is as power station heat-exchanger pipeline commonly used, and in long-term use, its inner-walls of duct generates oxide skin easily.Oxide skin is one deck cortex that is bonded at behind material and the oxygen generation chemical reaction on the object, oxide skin can be created on any position in the stainless-steel tube, because the thermal expansion coefficient difference between oxide skin and the stainless-steel tube is bigger, when pipe temperature changes, oxide skin can ftracture because of consequent thermal stress, peel off, straight length at stainless-steel tube, the oxide skin of peeling off is taken away by flowing of fluid easily, and at the U of stainless-steel tube type pipeline section, not only the oxide skin of self peeling off is not easy to be taken away by flowing of fluid, and the oxide skin that straight length peeled off also collects in the fluid moving process easily at U type pipeline section, the scale thickness that causes this pipeline section of stainless-steel tube to be heaped also constantly increases, the sectional area that causes tube fluid to pass through constantly reduces, this situation is easy to cause booster, in case booster, cause heavy losses will for the country and people's property and life, therefore, in the use of stainless-steel tube, just need the thickness of oxide skin in the stainless-steel tube be detected, so that get rid of hidden danger in time.
Publication number is magnetic lossless detection method and the device that the application for a patent for invention of CN1441246A discloses a kind of Austenitic stainless steel pipe inner oxide, it is to be that the end outer wall of bend loss applies a steady magnetic field from nonmagnetic Austenitic stainless steel pipe outside, pipe interior is ferromagnetic inner oxide magnetization, be the stray magnetic field signal that oxide that the end outer wall of bend loss utilizes the magnetic-field-sensitive element testing to be magnetized produces from the pipeline outside, and be translated into electric signal by the magnetic-field-sensitive element and detect.This method can be used for detecting whether inner oxide is arranged in the Austenitic stainless steel pipe, and, proportional relation according to magnetisable material quantity in stray magnetic field strength and the pipeline, also can reflect what of inner oxide amount to a certain extent, but, because the oxide skin in the bend loss of stainless-steel tube is two kinds, a kind of is primary oxide skin, it is closely attached to the inside pipe wall place of stainless-steel tube, another kind is to fall type oxide skin, it is by primary oxide skin cracking, peel off the part that heap the back, fall the loose condition (of surface) that makes contact between the type oxide skin, there is the gap each other, can not be corresponding relation between amount and the thickness of oxide skin, though the oxide skin that has amount is few, but because the gap between the oxide skin is bigger, its thickness may be just thicker, chocking-up degree to stainless-steel tube will be more serious, and existing this detection method can not be come out the empty thick condition detection of oxide skin, in addition, existing this magnetic detection method is insensitive to the border, can not detect the boundary conditions of oxide skin effectively, such as, when oxide skin was the perk state, the amount of oxide skin may be few, but its chocking-up degree will be more serious in the higher position in the border perk, therefore, the distribution situation that detects scale thickness in the stainless-steel tube is more important, and it is the important evidence whether interior tamper of bend loss of judging stainless-steel tube can cause booster.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing is provided, can detect the distribution situation of scale thickness in the stainless-steel tube effectively, have easy to detect, easy realization, detect the effect characteristic of accurate.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing comprises the steps:
A. eddy current sensor is affixed to the position, a place of outer wall of the bend loss of stainless-steel tube;
B. the multiple-frequency signal that presets that described eddy current sensor is sent by AWG (Arbitrary Waveform Generator) is encouraged, and the tube wall that this multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
C. the vortex induction signal of oxide skin is picked up by described eddy current sensor, the vortex induction signal of eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, described vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. be 360 ° of axis rotations with described eddy current sensor with the center line of stainless-steel tube, described eddy current sensor is circumferentially rotated along the pipe outer wall of stainless-steel tube; Described eddy current sensor is in 360 ° of rotary courses, the signal excitation identical that sent by AWG (Arbitrary Waveform Generator) with step b, pick up the vortex induction signal that comes from oxide skin respectively around a plurality of positions of 360 °, these around the vortex induction signal of a plurality of positions of 360 ° respectively through amplifying, phase sensitive detection is handled the back and is sent into computer processing system by mould/number interface, and will be processed into the corresponding data of thickness of the oxide skin in a plurality of positions and the bending segment tested stainless-steel tube respectively around the vortex induction signal of a plurality of positions of 360 ° respectively by computer processing system;
E. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
F. with axis gradation stepping one segment distance of described eddy current sensor along stainless-steel tube, each stepping all repeats step b to step e, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
G. computer processing system is further handled the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube that step f is obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
The present invention solves the another kind of technical scheme that its technical matters adopts: a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing comprises the steps:
A. the multichannel swirl sensor that will line up linear array surrounds a circle perisporium of the bend loss of stainless-steel tube in the mode around 360 ° of stainless-steel tube tube walls;
B. the eddy current sensor of each passage adopts the mode of timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
C. picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
E. with axis gradation stepping one segment distance of described line array eddy sensors along stainless-steel tube, each stepping all repeats step B to step D, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
F. computer processing system is further handled corresponding to the figure that oxide skin vortex induction signal is shone upon of a plurality of tangent planes of stainless-steel tube step e obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
The present invention solves another technical scheme that its technical matters adopts: a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing comprises:
To line up the flexible multichannel swirl sensor pack of face battle array outside the wall of the bend loss of stainless-steel tube;
The eddy current sensor of each passage adopts the method for timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
Picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
Computer processing system carries out imaging processing according to the data that hold the pairing scale thickness of diverse location of stainless-steel tube tube wall, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to stainless-steel tube;
Computer processing system is further handled the mapped graphics of oxide skin vortex induction signal, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
The invention has the beneficial effects as follows, owing to adopted the outer wall that eddy current sensor is affixed to the bend loss of stainless-steel tube, eddy current sensor is encouraged by multiple-frequency signal, and the tube wall that makes the multi-frequency excitation signal pass stainless-steel tube produces eddy current in oxide skin, this vortex induction signal is picked up by eddy current sensor, the vortex induction signal that picks up is through amplifying, phase sensitive detection, be processed into the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube after the Frequency mixing processing undesired signal by computer processing system, by whole perisporium around the detection stainless-steel tube, obtain the corresponding a plurality of data of thickness of the oxide skin in a plurality of positions and the bending segment tested stainless-steel tube, computer processing system carries out imaging processing according to the data that hold the pairing scale thickness of diverse location of stainless-steel tube tube wall again, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to stainless-steel tube; And then obtaining one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape, this pseudo-three-dimensional image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
Below in conjunction with drawings and Examples the present invention is described in further detail; But a kind of method to scale thickness distribution carrying out Non-Destructive Testing in the stainless-steel tube of the present invention is not limited to embodiment.
Description of drawings
Fig. 1 is embodiment one a test philosophy synoptic diagram of the present invention.
Embodiment
Embodiment one, and referring to shown in Figure 1, a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing of the present invention comprises the steps:
A. eddy current sensor 1 is affixed to the position, a place of outer wall of the bend loss (being U type pipeline section) of stainless-steel tube 10; Eddy current sensor 1 is to be contained on the self-adaptation probe bracket 2, it is the first arm 21 and second arm 22 that this self-adaptation probe bracket 2 includes two arms, the first arm 21 is articulated with second arm 22 and is connected by spring, make the first arm 21, the first arm 22 arbitrarily angled in flare up 180 degree mutually, to adapt to the different caliber of stainless-steel tube; When eddy current sensor 1 is installed on the self-adaptation probe bracket, can adopt the mode that is threaded, eddy current sensor 1 can be adjusted up and down, so that allow eddy current sensor 1 be affixed to the tube wall of stainless-steel tube 10;
B. the multiple-frequency signal that presets that described eddy current sensor 1 is sent by AWG (Arbitrary Waveform Generator) is encouraged, and the tube wall that this multi-frequency excitation signal passes stainless-steel tube 10 produces eddy current in oxide skin 20;
C. the vortex induction signal of oxide skin 20 is picked up by described eddy current sensor 1, the vortex induction signal of eddy current sensor 1 output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, described vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. be 360 ° of axis rotations with described eddy current sensor 1 with the center line of stainless-steel tube, being actually self-adaptation probe bracket 2 is 360 ° of axis rotations with the center line of stainless-steel tube 10, makes the eddy current sensor 1 that is installed on the self-adaptation probe bracket 2 carry out synchronous circumferential rotation along the pipe outer wall of stainless-steel tube 10; Described eddy current sensor 1 is in 360 ° of rotary courses, the signal excitation identical that sent by AWG (Arbitrary Waveform Generator) with step b, pick up the vortex induction signal that comes from oxide skin respectively around a plurality of positions of 360 °, these around the vortex induction signal of a plurality of positions of 360 ° respectively through amplifying, phase sensitive detection, send into computer processing system by mould/number interface after the Frequency mixing processing undesired signal, and will be processed into the corresponding data of thickness of the oxide skin in a plurality of positions and the bending segment tested stainless-steel tube 1 by computer processing system respectively respectively around the vortex induction signal of a plurality of positions of 360 °;
E. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
F. with axis gradation stepping one segment distance of described eddy current sensor 1 along stainless-steel tube, each stepping all repeats step b to step e, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
G. computer processing system is further handled the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube that step f is obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
Embodiment two, and a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing of the present invention comprises the steps:
A. the multichannel swirl sensor that will line up linear array surrounds a circle perisporium of the bend loss (being U type pipeline section) of stainless-steel tube in the mode around 360 ° of stainless-steel tube tube walls;
B. the eddy current sensor of each passage adopts the mode of timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
C. picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
E. with axis gradation stepping one segment distance of described line array eddy sensors along stainless-steel tube, each stepping all repeats step B to step D, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
F. computer processing system is further handled corresponding to the figure that oxide skin vortex induction signal is shone upon of a plurality of tangent planes of stainless-steel tube step e obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
Embodiment three, and a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing of the present invention comprises:
To line up outside the wall of the bend loss (being U type pipeline section) of the flexible multichannel swirl sensor pack of face battle array around stainless-steel tube;
The eddy current sensor of each passage adopts the method for timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
Picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
Computer processing system carries out imaging processing according to the data that hold the pairing scale thickness of diverse location of stainless-steel tube tube wall, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to stainless-steel tube;
Computer processing system is further handled the mapped graphics of oxide skin vortex induction signal, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
The foregoing description only is used for further specifying a kind of method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing of the present invention; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection domain of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (3)
1. the method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing is characterized in that: comprise the steps:
A. eddy current sensor is affixed to the position, a place of outer wall of the bend loss of stainless-steel tube;
B. the multiple-frequency signal that presets that described eddy current sensor is sent by AWG (Arbitrary Waveform Generator) is encouraged, and the tube wall that this multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
C. the vortex induction signal of oxide skin is picked up by described eddy current sensor, the vortex induction signal of eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, described vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. be 360 ° of axis rotations with described eddy current sensor with the center line of stainless-steel tube, described eddy current sensor is circumferentially rotated along the pipe outer wall of stainless-steel tube; Described eddy current sensor is in 360 ° of rotary courses, the signal excitation identical that sent by AWG (Arbitrary Waveform Generator) with step b, pick up the vortex induction signal that comes from oxide skin respectively around a plurality of positions of 360 °, these around the vortex induction signal of a plurality of positions of 360 ° respectively through amplifying, phase sensitive detection, send into computer processing system by mould/number interface after the Frequency mixing processing undesired signal, and will be processed into the corresponding data of thickness of the oxide skin in a plurality of positions and the bending segment tested stainless-steel tube by computer processing system respectively respectively around the vortex induction signal of a plurality of positions of 360 °;
E. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
F. with axis gradation stepping one segment distance of described eddy current sensor along stainless-steel tube, each stepping all repeats step b to step e, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
G. computer processing system is further handled the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube that step f is obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
2. the method that scale thickness in the stainless-steel tube is distributed and carries out Non-Destructive Testing is characterized in that: comprise the steps:
A. the multichannel swirl sensor that will line up linear array surrounds a circle perisporium of the bend loss of stainless-steel tube in the mode around 360 ° of stainless-steel tube tube walls;
B. the eddy current sensor of each passage adopts the mode of timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
C. picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
D. computer processing system carries out imaging processing according to the data around the pairing scale thickness of diverse location of 360 ° of stainless-steel tube tube walls, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a tangent plane of stainless-steel tube;
E. with axis gradation stepping one segment distance of described line array eddy sensors along stainless-steel tube, each stepping all repeats step B to step D, thereby obtains the figure that oxide skin vortex induction signal is shone upon corresponding to a plurality of tangent planes of stainless-steel tube;
F. computer processing system is further handled corresponding to the figure that oxide skin vortex induction signal is shone upon of a plurality of tangent planes of stainless-steel tube step e obtained, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
3. method that scale thickness in the stainless-steel tube is distributed and to carry out Non-Destructive Testing is characterized in that: comprising:
To line up the flexible multichannel swirl sensor pack of face battle array outside the wall of the bend loss of stainless-steel tube;
The eddy current sensor of each passage adopts the method for timesharing excitation to be encouraged by the multiple-frequency signal that presets that AWG (Arbitrary Waveform Generator) is sent respectively, and the tube wall that the multi-frequency excitation signal passes stainless-steel tube produces eddy current in oxide skin;
Picked up by separately eddy current sensor at the vortex induction signal of oxide skin corresponding to the eddy current sensor of each passage, the vortex induction signal of each eddy current sensor output is sent into computer processing system by mould/number interface after amplification, phase sensitive detection, Frequency mixing processing undesired signal, each vortex induction signal Processing is become the corresponding data of thickness of the oxide skin in the corresponding position and bending segment stainless-steel tube by computer processing system;
Computer processing system carries out imaging processing according to the data that hold the pairing scale thickness of diverse location of stainless-steel tube tube wall, obtains the figure that oxide skin vortex induction signal is shone upon corresponding to stainless-steel tube;
Computer processing system is further handled the mapped graphics of oxide skin vortex induction signal, thereby form one and the corresponding pseudo-three-dimensional image of stainless-steel tube shape on display screen, this pseudo-three-dimensional image shines upon completely to oxide skin vortex induction signal; This image demonstrates the distribution situation of oxide skin in the stainless-steel tube.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033105B (en) * | 2010-11-25 | 2012-05-23 | 山东电力研究院 | Method for measuring deposition of scales at inner wall of Austenitic boiler tube based ultra-low-frequency vortex |
| CN103033558B (en) * | 2012-12-28 | 2015-02-04 | 湘潭宏达电子科技有限公司 | Non-destructive testing method for oxide accumulation state of inner wall of austenitic boiler steel tube of utility boiler |
| CN103454343B (en) * | 2013-09-13 | 2016-01-13 | 爱德森（厦门）电子有限公司 | A kind of method improving crack of metal surface EDDY CURRENT limiting snesibility |
| CN105203013A (en) * | 2015-10-30 | 2015-12-30 | 大连三环复合材料技术开发有限公司 | Nondestructive detecting system and method for surface layer thickness of elastic metal-plastic tile |
| CN105509631B (en) * | 2015-12-07 | 2018-05-18 | 天津因科新创科技有限公司 | A kind of impulse eddy current method for testing wall thickness and device |
| CN110579528B (en) * | 2019-08-13 | 2023-01-31 | 山东电力工业锅炉压力容器检验中心有限公司 | ACFM probe and method for detecting GIS shell D-type weld joint |
| CN111043975A (en) * | 2019-12-30 | 2020-04-21 | 中核北方核燃料元件有限公司 | Eddy current detection device for detecting thickness of inner cladding of tubular fuel element |
| CN113504294A (en) * | 2021-06-15 | 2021-10-15 | 浙江工业大学 | Steel bar non-uniform corrosion measuring device based on magnetic induction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124641A (en) * | 1989-12-27 | 1992-06-23 | Framatome | Eddy current probe method and device for simultaneously measuring the distance between metal tubes and oxide thickness on the tubes |
| CN101344595A (en) * | 2008-09-09 | 2009-01-14 | 北京圣德金鉴科技有限公司 | Shield excitation quantitative determination probe and method thereof |
-
2009
- 2009-03-16 CN CN2009101113006A patent/CN101587096B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124641A (en) * | 1989-12-27 | 1992-06-23 | Framatome | Eddy current probe method and device for simultaneously measuring the distance between metal tubes and oxide thickness on the tubes |
| CN101344595A (en) * | 2008-09-09 | 2009-01-14 | 北京圣德金鉴科技有限公司 | Shield excitation quantitative determination probe and method thereof |
Non-Patent Citations (5)
| Title |
|---|
| JP特开平11-142577A 1999.05.28 |
| Manuchehr Soleimani,William R.B.Lionheart,Antony J.Peyton,et.A Three-Dimensional Inverse Finite-Element Method Applied to Experimental Eddy-Current Imaging Data.《IEEE TRANSACTIONS ON MAGNETICS》.2006,第42卷(第5期),第1560至1567页. * |
| ManuchehrSoleimani William R.B.Lionheart |
| 沈建民，邱法聚，王小华.《奥氏体不锈钢换热器管的涡流检测》.《无损检测》.2008,第30卷(第8期),第547至549页. * |
| 龙毅,谢国胜,杨湘伟.《锅炉炉管内壁氧化膜壁厚的测量》.《无损检测》.2006,第28卷(第11期),第569至572页. * |
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