CN107941904A - 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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- CN107941904A CN107941904A CN201711398962.7A CN201711398962A CN107941904A CN 107941904 A CN107941904 A CN 107941904A CN 201711398962 A CN201711398962 A CN 201711398962A CN 107941904 A CN107941904 A CN 107941904A
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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 jointly on photosensitive resin coil rack 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 the three cored wire group coilings that are formed of 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, and 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, and quick, high accuracy can be carried out to aerial metal path defective tube and is detected, has important engineering application value.
Description
Technical field
The invention belongs to technical field of nondestructive testing, is related to inspection probe and detection side in a kind of aerial metal path defective tube
Method.
Background technology
At present, metal tube, aerial metal small diameter tube are widely present 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 it has higher specific strength and than firm
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 due to aerial metal path pipe surface or internal small sized defects and causes aircraft key portion
Part fails, and 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.Currently for aerial metal small diameter tube small sized defects
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.
The content 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 that：(
Inspection probe in a kind 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 cored wire groups 4 are swashed using same pumping signal in the sandwich wound coil 1 and circumferential square coil group pattern 2
Encourage；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 cored wire groups, 4 coiling, and three cored wire groups 4 are not overturn in coiling, the three cored 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
State the first detection coil 5 takes differential fashion to connect with the second detection coil 7, its induced voltage signal exported is believed for detection
Number, 5 and second detection coil 7 of the first detection coil is 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, specific method are 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 the internal diameter boat identical with its diameter in aerial metal path defective tube
In empty metal tube, axial scanning coordinate in pipeline is former for it for the initial position of inspection probe in aerial metal path defective tube
Point, the interior inspection probe of aerial metal path defective tube carry out not circumferentially rotating during axial scanning in pipeline；In axial scanning
Optional position lxPlace, signal generator and power amplifier produce 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, gathers 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 the circumferential square coil group pattern 2 of extractionx1, Δ
Vlx2..., Δ VlxnPeak value Vlx1, Vlx2..., VlxnAs its signal characteristic, optional position l is thus obtainedxLocate square coil
Group position and the scanning indicatrix l of signal characteristicxn；For whole 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, specific method are as follows：
There is scanning position l during peak value in extraction scanning indicatrix Vly；Extract scanning position lyLocate square coil group position
Put the scanning indicatrix l with signal characteristicynThere are the 2 π y/n of square coil group position during extreme value.The axial location of defect and
Circumferential is respectively lyWith 2 π y/n；
(3) aerial metal small diameter tube Quantitative Evaluation of Defect, specific method are 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..., HnThe defects of, visited by being examined in aerial metal path defective tube
The axial scanning of head, respectively obtains scanning indicatrix Vla1、Vla2、Vla3..., Vlan, scanning indicatrix and reference axis structure
Area into 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
Mean depth and the invariance curve of scanning indicatrix peak value, carry out linear fit to the curve and obtain 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, wherein a, b, c and d is constant；
For the aerial metal small diameter tube that defect geometry size is unknown, its scanning indicatrix Vl is obtainedxSVlxAnd 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 possessing following advantage：
1st, present invention probe can be realized circumferential using the circumferential square coil group pattern closely arranged in once axial scanning
Picked up while detecting signal, effectively increase 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 produces in metal tube, thus has stronger detection signal.
2nd, sandwich wound coil and circumferential square coil group pattern respectively carry out defect axial and axial precise positioning and determine
Amount assessment.
3rd, the coil that the present invention pops one's head in is formed using three cored wire groups without upset coiling, and three cored wire group intermediate coils are as sharp
Encourage, two other coil is as detection coil, the spacing very little of two detection coils, is only the line width of excitation coil, therefore right
The response of small sized defects is very sensitive；During tested aerial metal pipe fitting zero defect, the detection signal of output is zero, and tested boat
For empty metal tube there are during tiny flaw, detection probe meeting output amplitude significantly detects signal, can be effectively increased tiny flaw
Recall rate.
Brief description of the drawings
Fig. 1 is sonde configuration schematic diagram of the present invention.
Fig. 2 is present invention probe profile.
Fig. 3 is present invention probe top view.
Fig. 4 is coil group schematic diagram.
Fig. 5 is experimental system block diagram.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is described in further 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 being fixed on photosensitive resin coil rack 3 and circumferential square coil group pattern
2, the central symmetry axis of the sandwich wound coil 1 and the symmetrical overlapping of axles of photosensitive resin coil rack 3, 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 cored wire groups 4 are swashed using same pumping signal in the sandwich wound coil 1 and circumferential square coil group pattern 2
Encourage；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 cored wire groups, 4 coiling, and three cored wire groups 4 are not overturn in coiling, the three cored 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
State the first detection coil 5 takes differential fashion to connect with the second detection coil 7, its induced voltage signal exported is believed for detection
Number, 5 and second detection coil 7 of the first detection coil is 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, specific method are as follows：
As shown in figure 5, it is 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 for it, sit by axial direction scanning in pipeline in aerial metal path defective tube
Origin is marked, inspection probe carries out not circumferentially rotating during axial scanning in pipeline in aerial metal path defective tube.In axial direction
The optional position l of scanningxPlace, signal generator and power amplifier produce 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, sandwich wound coil group 1 is gathered 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 extraction sandwich wound coil 1xPeak value VlxAs its signal characteristic, extraction
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, optional position l is thus obtainedxLocate the scanning indicatrix l of square coil group position and signal characteristicxn；
For whole 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, specific method are as follows：
There is scanning position l during peak value in extraction scanning indicatrix Vly；Extract scanning position lyLocate square coil group position
Put the scanning indicatrix l with signal characteristicynThere are the 2 π y/n of square coil group position during extreme value.The axial location of defect and
Circumferential is respectively lyWith 2 π y/n.
(3) aerial metal small diameter tube Quantitative Evaluation of Defect, specific method are 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..., HnThe defects of, visited by being examined in aerial metal path defective tube
The axial scanning of head can respectively obtain scanning indicatrix Vla1、Vla2、Vla3..., Vlan, scanning indicatrix and reference axis structure
Area into 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
Depth and the invariance curve of 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, it is bent with scanning feature that depth of defect can be obtained
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 is constant.
For the aerial metal small diameter tube that defect geometry size is unknown, its scanning indicatrix Vl can be obtainedxSVlxAnd 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 (3)
- A kind of 1. inspection probe in aerial metal path defective tube, it is characterised in that：Including being fixed on 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.
- 2. pop one's head according to being examined in claim 1 aerial metal path defective tube, it is characterised in that：The circumferential direction square coil group battle array Row (2) are made of the identical square coil group of n parameter, and adjacent square coil contacts with each other；The sandwich wound coil (1) and The square coil of circumferential square coil group pattern (2) is formed by three cored wire group (4) coilings, and three cored wire groups (4) are in coiling Do not overturn, the three cored wires group (4) contains the absolute coil of three laid out in parallel, is respectively excitation coil (6), first Detection coil (5) and the second detection coil (7), first detection coil (5) and the second detection coil (7) take differential fashion Connection, its induced voltage signal exported are detection signal, first detection coil (5) and the second detection coil (7) with Excitation coil (6) is in close contact, and its spacing is the line width of excitation coil (6)；The sandwich wound coil (1) and circumferential square coil group Three cored wire groups (4) use same pumping signal into row energization in array (2) square coil.
- 3. the detection method of inspection probe in the aerial metal path defective tube of claim 1 or 2, it is characterised in that：Including boat Foundation, aerial metal small diameter tube defect location and the defect quantitative of empty metal tube impulse eddy current signal scanning indicatrix are commented Estimate；(1) foundation of aerial metal pipe fitting impulse eddy current signal scanning indicatrix, specific method are 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 the 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 during axial scanning in pipeline in empty metal path defective tube；In any of axial scanning Position lxPlace, signal generator and power amplifier produce square-wave signal, excitation sandwich wound coil (1) and circumferential square coil group battle array Excitation coil (6) work in (2) is arranged, at the same time, gathers the sensing of sandwich wound coil (1) by data collecting card 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 the circumferential square coil group pattern (2) of extraction Vlx1, Δ Vlx2..., Δ VlxnPeak value Vlx1, Vlx2..., VlxnAs its signal characteristic, optional position l is thus obtainedxLocate square Shape coil group position and the scanning indicatrix l of signal characteristicxn；For whole 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, specific method are as follows：There is scanning position l during peak value in extraction scanning indicatrix Vly；Extract scanning position lyLocate square coil group position with The scanning indicatrix l of signal characteristicynThere are the 2 π y/n of square coil group position during extreme value；The axial location and circumferential direction of defect Respectively lyWith 2 π y/n；(3) aerial metal small diameter tube Quantitative Evaluation of Defect, specific method are 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..., HnThe defects of, popped one's head in by being examined in aerial metal path defective tube Axial scanning, respectively obtains scanning indicatrix Vla1、Vla2、Vla3..., Valn, scanning indicatrix and reference axis are formed 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 Mean depth and the invariance curve of scanning indicatrix peak value, carry out linear fit to the curve and obtain 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, wherein a, b, c and d is constant； For the aerial metal small diameter tube that defect geometry size is unknown, its scanning indicatrix Vl is obtainedxSVlxAnd 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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| CN108693244A (en) * | 2018-04-27 | 2018-10-23 | 西安交通大学 | For the built-in S types array eddy current probe and method of tubular structure defects detection |
| CN111830125A (en) * | 2020-08-05 | 2020-10-27 | 西安交通大学 | Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method |
| CN112114031A (en) * | 2020-10-14 | 2020-12-22 | 西安石油大学 | Detector for measuring metal defects of petroleum pipeline matrix |
| CN112415088A (en) * | 2020-11-03 | 2021-02-26 | 南昌航空大学 | Inner-through transverse pulse eddy current detection probe and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111830125A (en) * | 2020-08-05 | 2020-10-27 | 西安交通大学 | Orthogonal excitation-receiving eddy current detection probe and hot isobaric welding debonding defect detection method |
| CN112114031A (en) * | 2020-10-14 | 2020-12-22 | 西安石油大学 | Detector for measuring metal defects of petroleum pipeline matrix |
| CN112114031B (en) * | 2020-10-14 | 2023-10-17 | 西安石油大学 | Detector for measuring metal defects of petroleum pipeline base body |
| CN112415088A (en) * | 2020-11-03 | 2021-02-26 | 南昌航空大学 | Inner-through transverse pulse eddy current detection probe and use method thereof |
| 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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|---|---|
| CN107941904B (en) | 2018-12-18 |
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