CN107941904B - Inspection probe and detection method in aerial metal path defective tube - Google Patents
Inspection probe and detection method in aerial metal path defective tube Download PDFInfo
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- CN107941904B CN107941904B CN201711398962.7A CN201711398962A CN107941904B CN 107941904 B CN107941904 B CN 107941904B CN 201711398962 A CN201711398962 A CN 201711398962A CN 107941904 B CN107941904 B CN 107941904B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/904—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents with two or more sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
Abstract
The present invention discloses inspection probe and method in a kind of aerial metal path defective tube, the probe includes a sandwich wound coil being fixed on photosensitive resin coil rack jointly and circumferential square coil group pattern, sandwich wound coil and photosensitive resin coil rack are coaxial, square coil is evenly distributed along the periphery in circumferential square coil group pattern, adjacent square coil contacts with each other, and sandwich wound coil passes perpendicularly through the air-shed that each square coil is surrounded；The winding of sandwich wound coil and square coil by three side by side and three core wire group coilings composed by the identical copper core enameled wire of diameter form；The winding of each coil contains three absolute coils, and intermediate coil is excitation coil, and both sides are detection coil, takes differential fashion to connect two detection coils, the induced voltage signal difference that two detection coils are picked up is as output signal；The present invention also provides the detection method of above-mentioned probe, aerial metal path defective tube can be carried out to detect quickly, in high precision, there is important engineering application value.
Description
Technical field
The invention belongs to technical field of nondestructive testing, it is related to inspection probe and detection side in a kind of aerial metal path defective tube
Method.
Background technique
Currently, being widely present metal tube, aerial metal small diameter tube in the space flight/airframe such as aircraft and rocket
(such as aluminium-alloy pipe, copper pipe) is mainly used for fuel conveying etc., it is advantageous that its specific strength with higher and ratio are rigid
Degree, can effectively mitigate airframe weight, improve flying quality and increase economic benefit.
Due to complicated Service Environment, the small sized defects such as aerial metal small diameter tube easily cracks, spot corrosion, Hen Duohang
The generation of empty space flight accident is all to lead to aircraft key portion due to aerial metal path pipe surface or internal small sized defects
Part failure, destroys Flight Vehicle Structure integrality.Therefore, find defect for ensuring aircraft flight safety, reducing thing in time
Therefore probability of happening, the every loss of reduction etc. have very important significance.It is directed to aerial metal small diameter tube small sized defects at present
Pulsed eddy current testing probe and detection method research it is less, it can be achieved that aerial metal path defective tube accurately and fast position and
Inspection probe and detection method are still rare in the impulse eddy current of qualitative assessment.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of the invention to propose a kind of aerial metal small diameter tube
Inspection probe and detection method in defect can carry out quick, precise positioning to aerial metal path defective tube, have important work
Journey application value.
In order to achieve the above object, the present invention adopts the following technical scheme: (
A kind of interior inspection probe of aerial metal path defective tube, including the disc type line being fixed on photosensitive resin coil rack 3
Circle 1 and circumferential square coil group pattern 2, the sandwich wound coil 1 and photosensitive resin coil rack 3 are coaxial, the circumferential direction rectangular lines
The square coil for enclosing group pattern 2 is arranged along the even circumferential of sandwich wound coil 1, adjacent square coil contacts with each other, and disc type line
Circle 1 passes perpendicularly through the air-shed that each square coil is surrounded.
Three core wire groups 4 are swashed using same pumping signal in the sandwich wound coil 1 and circumferential square coil group pattern 2
It encourages；The circumferential direction square coil group pattern 2 is made of the identical square coil group of n parameter.The sandwich wound coil 1 and circumferential square
Shape coil group pattern 2 is formed by three core wire groups, 4 coiling, and three core wire groups 4 are not flipped in coiling, the three core wires group
4 contain the absolute coil of three laid out in parallel, respectively excitation coil 6, the first detection coil 5 and the second detection coil 7, institute
It states the first detection coil 5 and takes differential fashion to connect with the second detection coil 7, the induced voltage signal of output is detection letter
Number, first detection coil 5 and the second detection coil 7 are in close contact with excitation coil 6, and its spacing is excitation coil 6
Line width.
The detection method of inspection probe in the aerial metal path defective tube, it is characterised in that: including aerial metal pipe fitting
Foundation, aerial metal small diameter tube defect location and the Quantitative Evaluation of Defect of impulse eddy current signal scanning indicatrix；
(1) foundation of aerial metal small diameter tube impulse eddy current signal scanning indicatrix, the specific method is as follows:
It is sequentially connected inspection probe, filter and amplification in signal generator, power amplifier, the aerial metal path defective tube
Device, data collecting card and computer will examine probe placement in internal diameter boat identical with its diameter in aerial metal path defective tube
In empty metal tube, the initial position of inspection probe is that its axial scanning coordinate in pipeline is former in aerial metal path defective tube
Point, the interior inspection probe of aerial metal path defective tube carry out not circumferentially rotating when axial scanning in pipeline；In axial scanning
Any position lxPlace, signal generator and power amplifier generate square-wave signal, excitation sandwich wound coil 1 and circumferential square coil
Excitation coil 6 in group pattern 2 works, and at the same time, acquires the induced electricity of sandwich wound coil 1 by data collecting card by computer
Press signal difference Δ VlxBe located at 0 in circumferential square coil group pattern 2, rectangular lines at 2 π/n, 4 π/n, 6 π/n..., 2 π (n-1)/n
The induced voltage signal difference Δ Vl of circle groupx1, Δ Vlx2..., Δ Vlxn；Extract the induced voltage signal difference Δ Vl of sandwich wound coil 1x
Peak value VlxAs its signal characteristic, the induced voltage signal difference Δ Vl of circumferential square coil group pattern 2 is extractedx1, Δ
Vlx2..., Δ VlxnPeak value Vlx1, Vlx2..., VlxnAs its signal characteristic, any position l is thus obtainedxLocate square coil
The scanning indicatrix l of group position and signal characteristicxn；For entire scanning process, the signal characteristic Vl of sandwich wound coil 11,
Vl2..., VlkScanning indicatrix with its scanning position is Vl；
(2) aerial metal small diameter tube defect location, the specific method is as follows:
Extract scanning position l when peak value occurs in scanning indicatrix Vly；Extract scanning position lyLocate square coil group position
Set the scanning indicatrix l with signal characteristicynThere is the 2 π y/n of square coil group position when extreme value.The axial position of defect and
Circumferential is respectively lyWith 2 π y/n；
(3) aerial metal small diameter tube Quantitative Evaluation of Defect, the specific method is as follows:
In the identical aerial metal small diameter tube A of n geometric parameter1、A2、A3..., AnManufacturing deficiency volume is respectively for outside
T1、T2、T3..., Tn, defect mean depth is H1、H2、H3..., HnDefect, pass through in aerial metal path defective tube examine visit
The axial scanning of head, respectively obtains scanning indicatrix Vla1、Vla2、Vla3..., Vlan, scanning indicatrix and reference axis structure
Area at region is respectively SVl1、SVl2、SVl3..., SVln, scanning indicatrix peak value is respectively PVl1、PVl2、
PVl3..., PVln；With H1、H2、H3..., HnFor abscissa, PVl1、PVl2、PVl3..., PVlnFor ordinate, defect is obtained
The invariance curve of mean depth and scanning indicatrix peak value carries out linear fit to the curve and obtains fitting formula PT=aH+b,
With T1、T2、T3..., TnFor abscissa, SVl1、SVl2、SVl3..., SVlnFor ordinate, defect volume and scanning feature are obtained
The invariance curve of peak of curve carries out linear fit to the curve and obtains fitting formula ST=cT+d, and wherein a, b, c and d are constant；
The aerial metal small diameter tube unknown for defect geometry size obtains its scanning indicatrix VlxSVlxAnd PVlx, by its generation
Enter fitting formula PT=aH+b and ST=cT+d, the mean depth and volume of the defect can be calculated.
The present invention is compared to the prior art compared with having following advantage:
1, present invention probe can be realized circumferential using the circumferential square coil group pattern closely arranged in primary axial scanning
It is picked up while detecting signal, effectively increases the detection efficiency of defect, improve defect detection rate；In circumferential scanning direction
On, square coil group is stronger compared to the vortex that sandwich wound coil generates in metal tube, thus has stronger detection signal.
2, sandwich wound coil and circumferential square coil group pattern carry out axial and axial precise positioning to defect respectively and determine
Amount assessment.
3, the coil that the present invention pops one's head in is all made of three core wire groups and forms without overturning coiling, and three core wire group intermediate coils are as sharp
It encourages, other two coil is as detection coil, the spacing very little of two detection coils, the only line width of excitation coil, therefore right
The response of small sized defects is very sensitive；When tested aerial metal pipe fitting zero defect, the detection signal of output is zero, and tested boat
For empty metal tube there are when tiny flaw, detection probe meeting output amplitude significantly detects signal, can effectively increase tiny flaw
Recall rate.
Detailed description of the invention
Fig. 1 is sonde configuration schematic diagram of the present invention.
Fig. 2 is present invention probe sectional view.
Fig. 3 is present invention probe top view.
Fig. 4 is coil group schematic diagram.
Fig. 5 is experimental system block diagram.
Specific embodiment
With reference to the accompanying drawings and detailed description, invention is further described in detail.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, inspection probe in a kind of aerial metal path defective tube of the present invention, including fixation
In photosensitive resin coil rack 3, the sandwich wound coil 1 and circumferential square coil group pattern that are fixed on photosensitive resin coil rack 3
2, the central symmetry axis and the symmetrical overlapping of axles of photosensitive resin coil rack 3 of the sandwich wound coil 1, the circumferential direction square coil group
2 square coil of array is uniformly arranged, and adjacent square coil contacts with each other, and sandwich wound coil 1 passes perpendicularly through each square coil
The air-shed surrounded.
Three core wire groups 4 are swashed using same pumping signal in the sandwich wound coil 1 and circumferential square coil group pattern 2
It encourages；The circumferential direction square coil group pattern 2 is made of the identical square coil group of n parameter.The sandwich wound coil 1 and circumferential square
Shape coil group pattern 2 is formed by three core wire groups, 4 coiling, and three core wire groups 4 are not flipped in coiling, the three core wires group
4 contain the absolute coil of three laid out in parallel, respectively excitation coil 6, the first detection coil 5 and the second detection coil 7, institute
It states the first detection coil 5 and takes differential fashion to connect with the second detection coil 7, the induced voltage signal of output is detection letter
Number, first detection coil 5 and the second detection coil 7 are in close contact with excitation coil 6, and its spacing is excitation coil 6
Line width.
The detection method of inspection probe in the aerial metal path defective tube, including aerial metal pipe fitting impulse eddy current signal
Foundation, aerial metal small diameter tube defect location and the Quantitative Evaluation of Defect of scanning indicatrix；
(1) foundation of aerial metal metal small diameter tube impulse eddy current signal scanning indicatrix, the specific method is as follows:
As shown in figure 5, being sequentially connected inspection probe, filter in signal generator, power amplifier, aerial metal path defective tube
Twt amplifier, data collecting card and computer will examine probe placement in internal diameter and its diameter phase in aerial metal path defective tube
In same aerial metal pipe fitting, the initial position of inspection probe is that its axial direction scanning in pipeline is sat in aerial metal path defective tube
Origin is marked, inspection probe carries out not circumferentially rotating when axial scanning in pipeline in aerial metal path defective tube.In axial direction
Any position l of scanningxPlace, signal generator and power amplifier generate square-wave signal, excitation sandwich wound coil 1 and circumferential rectangle
Excitation coil 6 in coil group pattern 2 works, and at the same time, acquires sandwich wound coil group 1 by data collecting card by computer
Induced voltage signal difference Δ VlxBe located at 0 in square coil group pattern 2, rectangle at 2 π/n, 4 π/n, 6 π/n..., 2 π (n-1)/n
The induced voltage signal difference Δ Vl of coil groupx1, Δ Vlx2..., Δ Vlxn.Extract induced voltage signal difference Δ VlxPeak value Vlx
As its signal characteristic, the induced voltage signal difference Δ Vl of sandwich wound coil 1 is extractedxPeak value VlxAs its signal characteristic, extract
The induced voltage signal difference Δ Vl of circumferential square coil group pattern 2x1, Δ Vlx2..., Δ VlxnPeak value Vlx1, Vlx2...,
VlxnAs its signal characteristic, any position l is thus obtainedxLocate the scanning indicatrix l of square coil group position and signal characteristicxn；
For entire scanning process, the signal characteristic Vl of sandwich wound coil 11, Vl2..., VlkWith the scanning indicatrix of its scanning position
For Vl.
(2) aerial metal small diameter tube defect location, the specific method is as follows:
Extract scanning position l when peak value occurs in scanning indicatrix Vly；Extract scanning position lyLocate square coil group position
Set the scanning indicatrix l with signal characteristicynThere is the 2 π y/n of square coil group position when extreme value.The axial position of defect and
Circumferential is respectively lyWith 2 π y/n.
(3) aerial metal small diameter tube Quantitative Evaluation of Defect, the specific method is as follows:
In the identical aerial metal small diameter tube A of n geometric parameter1、A2、A3..., AnManufacturing deficiency volume is respectively for outside
T1、T2、T3..., Tn, defect mean depth is H1、H2、H3..., HnDefect, pass through in aerial metal path defective tube examine visit
The axial scanning of head can respectively obtain scanning indicatrix Vla1、Vla2、Vla3..., Vlan, scanning indicatrix and reference axis structure
Area at region is respectively SVl1、SVl2、SVl3..., SVln, scanning indicatrix peak value is respectively PVl1、PVl2、
PVl3..., PVln.With H1、H2、H3..., HnFor abscissa, PVl1、PVl2、PVl3..., PVlnFor ordinate, defect can be obtained
The invariance curve of depth and scanning indicatrix peak value, fitting formula PT=aH+b can be obtained by carrying out linear fit to the curve, with
T1、T2、T3..., TnFor abscissa, SVl1、SVl2、SVl3..., SVlnFor ordinate, depth of defect can be obtained and scanning feature is bent
The invariance curve of line peak value, fitting formula ST=cT+d can be obtained by carrying out linear fit to the curve, and wherein a, b, c and d are constant.
The aerial metal small diameter tube unknown for defect geometry size can obtain its scanning indicatrix VlxSVlxAnd PVlx, by its generation
Enter fitting formula PT=aH+b and ST=cT+d, the mean depth and volume of the defect can be calculated.
Claims (1)
1. the detection method of inspection probe in a kind of aerial metal path defective tube, the probe include photosensitive resin coil rack
(3), the sandwich wound coil (1) being fixed on photosensitive resin coil rack (3) and circumferential square coil group pattern (2), the disc type
Coaxially, the square coil of the circumferential direction square coil group pattern (2) is along disc type line for coil (1) and photosensitive resin coil rack (3)
The even circumferential arrangement of (1) is enclosed, and sandwich wound coil (1) passes perpendicularly through the air-shed that each square coil is surrounded；
The circumferential direction square coil group pattern (2) is made of the identical square coil group of n parameter, and adjacent square coil is mutual
Contact；The square coil of the sandwich wound coil (1) and circumferential square coil group pattern (2) by three core wire group (4) coilings and
At, and three core wire groups (4) are not flipped in coiling, the three core wires group (4) contains the independent lines of three laid out in parallel
Circle, respectively excitation coil (6), the first detection coil (5) and the second detection coil (7), first detection coil (5) and the
Two detection coils (7) take differential fashion to connect, and the induced voltage signal of output is detection signal, first detection coil
(5) it is in close contact with excitation coil (6) with the second detection coil (7), its spacing is the line width of excitation coil (6)；The disk
Three core wire groups (4) are swashed using same pumping signal in formula coil (1) and circumferential square coil group pattern (2) square coil
It encourages；
It is characterized by: the detection method includes the foundation of aerial metal pipe fitting impulse eddy current signal scanning indicatrix, boat
Empty metal small diameter tube defect location and Quantitative Evaluation of Defect；
(1) foundation of aerial metal pipe fitting impulse eddy current signal scanning indicatrix, the specific method is as follows:
Be sequentially connected inspection probe in signal generator, power amplifier, the aerial metal path defective tube, filter amplifier,
Data collecting card and computer will examine probe placement in internal diameter aviation gold identical with its diameter in aerial metal path defective tube
Belong in pipe fitting, the initial position of inspection probe is its axial scanning coordinate origin, boat in pipeline in aerial metal path defective tube
Inspection probe carries out not circumferentially rotating when axial scanning in pipeline in empty metal path defective tube；In any of axial scanning
Position lxPlace, signal generator and power amplifier generate square-wave signal, motivate sandwich wound coil (1) and circumferential square coil group battle array
Excitation coil (6) work in (2) is arranged, at the same time, the induction of data collecting card acquisition sandwich wound coil (1) is passed through by computer
Voltage signal difference Δ VlxBe located at 0 in circumferential square coil group pattern (2), square at 2 π/n, 4 π/n, 6 π/n..., 2 π (n-1)/n
The induced voltage signal difference Δ Vl of shape coil groupx1, Δ Vlx2..., Δ Vlxn；Extract the induced voltage signal of sandwich wound coil (1)
Poor Δ VlxPeak value VlxAs its signal characteristic, the induced voltage signal difference Δ of circumferential square coil group pattern (2) is extracted
Vlx1, Δ Vlx2..., Δ VlxnPeak value Vlx1, Vlx2..., VlxnAs its signal characteristic, any position l is thus obtainedxLocate square
The scanning indicatrix l of shape coil group position and signal characteristicxn；For entire scanning process, the signal characteristic of sandwich wound coil (1)
Vl1, Vl2..., VlkScanning indicatrix with its scanning position is Vl；
(2) aerial metal small diameter tube defect location, the specific method is as follows:
Extract scanning position l when peak value occurs in scanning indicatrix Vly；Extract scanning position lyLocate square coil group position with
The scanning indicatrix l of signal characteristicynThere is the 2 π y/n of square coil group position when extreme value；The axial position and circumferential direction of defect
Respectively lyWith 2 π y/n；
(3) aerial metal small diameter tube Quantitative Evaluation of Defect, the specific method is as follows:
In the identical aerial metal small diameter tube A of n geometric parameter1、A2、A3..., AnManufacturing deficiency volume is T respectively for outside1、
T2、T3..., Tn, defect mean depth is H1、H2、H3..., HnDefect, pass through in aerial metal path defective tube examine probe
Axial scanning respectively obtains scanning indicatrix Vla1、Vla2、Vla3..., Vlan, scanning indicatrix and reference axis are constituted
The area in region is respectively SVl1、SVl2、SVl3..., SVln, scanning indicatrix peak value is respectively PVl1、PVl2、
PVl3..., PVln；With H1、H2、H3..., HnFor abscissa, PVl1、PVl2、PVl3..., PVlnFor ordinate, defect is obtained
The invariance curve of mean depth and scanning indicatrix peak value carries out linear fit to the curve and obtains fitting formula PT=aH+b,
With T1、T2、T3..., TnFor abscissa, SVl1、SVl2、SVl3..., SVlnFor ordinate, defect volume and scanning feature are obtained
The invariance curve of peak of curve carries out linear fit to the curve and obtains fitting formula ST=cT+d, and wherein a, b, c and d are constant；
The aerial metal small diameter tube unknown for defect geometry size obtains its scanning indicatrix VlxSVlxAnd PVlx, by its generation
Enter fitting formula PT=aH+b and ST=cT+d, the mean depth and volume of the defect can be calculated.
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| CN201711398962.7A CN107941904B (en) | 2017-12-21 | 2017-12-21 | Inspection probe and detection method in aerial metal path defective tube |
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| CN201711398962.7A CN107941904B (en) | 2017-12-21 | 2017-12-21 | Inspection probe and detection method in aerial metal path defective tube |
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| CN108693244B (en) * | 2018-04-27 | 2019-02-26 | 西安交通大学 | For the built-in S type array eddy current probe and method of tubular structure defects detection |
| CN111830125B (en) * | 2020-08-05 | 2022-05-03 | 西安交通大学 | Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method |
| CN112114031B (en) * | 2020-10-14 | 2023-10-17 | 西安石油大学 | Detector for measuring metal defects of petroleum pipeline base body |
| CN112415088B (en) * | 2020-11-03 | 2023-06-27 | 南昌航空大学 | Internal penetrating type transverse pulse eddy current detection probe and application method thereof |
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| JPH073408B2 (en) * | 1985-03-29 | 1995-01-18 | 日本鋼管株式会社 | Pipeline pitting detector |
| JPWO2002097425A1 (en) * | 2001-05-29 | 2004-09-16 | 学校法人日本大学 | Mutual lead interpolation probe |
| CN104076092B (en) * | 2014-06-24 | 2015-08-05 | 西安交通大学 | A kind of small diameter tube lossless detection method based on electromagnetic acoustic phase array focusing principle |
| CN104502443A (en) * | 2014-12-12 | 2015-04-08 | 北京工业大学 | Circular-array-type magnetostriction sensor based on orthogonal encircling coil |
| CN105158331B (en) * | 2015-10-23 | 2018-01-02 | 爱德森（厦门）电子有限公司 | A kind of device and method of the in-service local eddy currents scanning imagery of small diameter tube |
| CN106645393B (en) * | 2016-12-02 | 2017-11-28 | 西安交通大学 | Inspection imaging probe and method in aviation non-ferromagnetic metal pipe corrosion defect |
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