CN108344798A - A kind of the double frequency excitation circular vortex probe and method of detection heavy wall deep torn grain defect - Google Patents
A kind of the double frequency excitation circular vortex probe and method of detection heavy wall deep torn grain defect Download PDFInfo
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Abstract
The invention belongs to technical field of nondestructive testing, are related to a kind of the double frequency excitation circular vortex probe and method of detection heavy wall deep torn grain defect.Double frequency excitation circular vortex probe of the present invention, including double frequency excitation probe assembly, detection probe component and fixed frame；The incentive probe component has two groups, centered on detection probe component, symmetrical distribution；The incentive probe component is made of excitation coil and excitation coil installation column；The detection probe component is made of detection coil and detection coil installation column；The fixed frame is made of the column fixed plate and scanning component connection being fixedly connected；The excitation coil installation column bottom end and detection coil installation column bottom end are mounted in column fixed plate；The excitation coil is circular vortex coil, is encouraged using sinusoidal bifrequency alternating current.The detectability of vortex penetration depth and probe to deep torn grain can be improved using double frequency excitation of the present invention probe, penetration depth can reach 21mm or so.
Description
Technical field
The invention belongs to technical field of nondestructive testing, are related to a kind of eddy current probe for industrial detection defect, especially relate to
And a kind of double frequency excitation circular vortex probe and method of detection heavy wall deep torn grain defect.
Background technology
EDDY CURRENT is one of conventional non-destructive testing technology, is based on electromagnetic induction principle, electromagnetically according to material
The electromechanical detection method for implementing material and component defect detection and performance test can be changed, basic principle is with electromagnetism
Theory based on.Eddy current detection method has that non-contact, detection speed is fast and the advantage of the quantitative aspect of checking, is a kind of
The effective ways of quantitative Nondestructive Evaluation are carried out to body structure surface and near surface flaw.Be vortexed online measuring technique in the industry by
It is widely used in large-scale, heavy, special equipment and the manufacture of aerospace key components and parts, therefore, the detection technique of crackle
To ensureing that equipment operational safety, evaluation equipment life, reduction cost of equipment maintenance etc. are most important.
Conventional vortex detection at present is detected using the eddy current probe of single-frequency, rests essentially within nearly cosmetic bug
Detection, because there are apparent kelvin effect, it is limited to deeper defect in equipment part and deep zone defect recognition capability.
Although by optimizing sonde configuration parameter, reducing the measures such as driving frequency, the inspection to deep torn grain can be improved to a certain extent
Effect is surveyed, but exists simultaneously other problems：Although such as using low-frequency excitation that can increase vortex penetration depth, improve probe detection
The ability of deep zone defect, but can lead to pop one's head in that resolution ratio is low, signal-to-noise ratio is low, detection speed and signal amplitude are too low simultaneously, and draw
The problems such as having sent out probe speed effect and difficult detection signal resolution.Even if by using interferometer（SQUID）, giant magnetoresistance sensing
Device（GMR）, the modes such as the magneto sensors such as Hall element and magnetic circuit shielding can improve sensitivity, but detection speed is too low asks
Topic cannot be well solved always, thus can not be applied to large area high speed detection occasion.
Therefore, eddy current probe of the research suitable for large area heavy wall deep torn grain defect high speed detection is ensureing equipment
Safe operation, evaluation equipment life, reduction cost of equipment maintenance etc. are of great significance and foreground.
Invention content
For overcome the deficiencies in the prior art, above-mentioned problems of the prior art are solved, it is an object of the invention to
A kind of the double frequency excitation circular vortex probe and detection method of detection heavy wall deep torn grain defect are provided, two different frequencies are passed through
Excitation coil while reverse energization, generate compound vortex field in material for test, change vortex field in material to reach
Distribution and the purpose for increasing penetration depth.And single-frequency（Low-frequency excitation）, compared using prior arts such as magneto sensors,
The problems such as present invention can effectively solve low probe resolution ratio, sensitivity decline, detection speed is low, detection signal resolution is difficult, can
For the high-volume high speed detection of heavy wall component deep layer crack defect, for the industrial detection of heavy wall deep torn grain defect in practice and comment
Offer accurately and reliably basis for estimation is provided.
The technical solution adopted by the present invention is：A kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect,
It is characterized in that：Including incentive probe component, detection probe component and fixed frame；The incentive probe component has two groups, with inspection
Centered on probing head assembly, symmetrical distribution；Every group of the incentive probe component is corresponding by 1 excitation coil and 1
Excitation coil installs column composition, and the excitation coil is sleeved on excitation coil installation column；The detection probe component is by examining
Test coil and detection coil installation column composition, the detection coil are sleeved on detection coil installation column；The fixed frame by
Column fixed plate and scanning component connection composition, the column fixed plate are fixedly connected with scanning component connection；It is described to swash
It encourages coil installation column bottom end and detection coil installation column bottom end is mounted in column fixed plate；The column fixed plate
It is fixedly connected with scanning component connection.
Further, the double frequency excitation circular vortex probe can entirely through the scanning component connection and scanning component
Dismounting installation.
Further, the excitation coil is circular vortex coil, is encouraged using sinusoidal bifrequency alternating current.
Further, the detection probe component has one group, is installed by 1 detection coil and 1 corresponding detection coil vertical
Column forms.
Further, the detection coil is circular vortex coil.
Further, the diameter of the excitation coil and corresponding excitation coil installation column is respectively greater than the detection coil
And the diameter of corresponding detection coil installation column.
Further, the excitation coil is sleeved on completely on excitation coil installation column, and top end face is installed with excitation coil
Column top face is kept in the same plane, to keep excitation coil fixed relative position relation in detection process.
Further, the detection coil is sleeved on completely on detection coil installation column, and top end face is installed with detection coil
Column top face is kept in the same plane, to keep detection coil fixed relative position relation in detection process.
Further, the scanning component connection is connecting plate, and mounting hole is provided on connecting plate, is used for the double frequency
Circular vortex is encouraged to pop one's head in integral installation on scanning component.
Preferably, the mounting hole has multiple, is symmetrically distributed on scanning component connection.
Further, the excitation coil installation column, detection coil installation column and fixed frame are made of PVC material.
Further, the excitation coil and detection coil are formed by enameled wire coiling.
Based on said program, another technical solution used in the present invention is：A kind of above-mentioned double frequency excitation circular vortex
The method that probe is detected heavy wall deep torn grain defect, it is characterised in that：
S1. by synchronous AC power supply, frequency and steady-state sine of different sizes excitation are continually fed into two groups of excitation coils
Electric current, the sinusoidal excitation current generate vortex field in metal plate test specimen；
S2. by scanning console, so that detection probe component is carried out C in surface of test piece and sweep, the vortex field of fault location is by defect
Disturbance, defect information is fed back in detection coil by disturbed magnetic field；
S3. the detection signal in detection coil is input in filter, removing high frequency therein using filters filter makes an uproar
Sound is output to oscillograph；
S4. the detection signal for being filtered to remove high-frequency noise is input in amplifier, by amplifier by faint detection signal
Amplification；
S5. by test specimen flaw indication, real-time display comes out on oscillograph, finds defect, passes through the calibration curve of standard specimen
Calculate the actual grade of the defect.
Further, clearance distance S=(1.4-2) × R between two groups of excitation coilso, RoFor the outer radius of excitation coil；Swash
The clearance distance encouraged between coil plays an important role to the overall dimensions of probe and the detection performance of probe, directly affects drastic crack
The testing result of line, the detection depth for keeping suitable distance that can effectively improve probe to crackle.The present invention preferably takes two
Larger circular vortex coil is as exciting element, and a smaller circular vortex coil is as detection signal collecting element, inspection
Test coil is located at the point midway of two round excitation coil lines of centres, is proved by analyzing experiment, two round excitation lines
The spacing of circle is S=(1.4-2) × Ro, it can be achieved that detection to deep defects when this distance range.
Further, in two groups of excitation coils, the higher side excitation coil of frequency matches smaller exciting current, frequency compared with
Larger exciting current is matched in low side, and size of current is maintained at the driving frequency being passed through thereto in each excitation coil
0.5-0.7 times.The configuration of probe mainly including the configuration of exciting current size and driving frequency in excitation coil, excitation coil it
Between gap configuration etc..The distribution of exciting current size directly affects the size of eddy current depth in two excitation coils.Excitation
The restriction for vortex density size excited target frequency and exciting current both factors that coil current is generated in surface of test piece.It is different
The vortex density size that driving frequency, different exciting current sizes are generated in surface of test piece is different, by adjusting excitation simultaneously
Frequency and exciting current ratio, when reaching desired value, so that it may effectively reduce the kelvin effect of surface of test piece.High current can
Larger vortex density is generated, the higher side excitation coil of frequency matches smaller exciting current, the lower side choosing of frequency
It with larger exciting current, is tested by analyzing, the present invention can be obtained when size of current is maintained at 0.5-0.7 times of driving frequency
To comparatively ideal effect.
The principle of the present invention is：
First, frequency and steady-state sine exciting current of different sizes, sinusoidal excitation electricity are continually fed into two groups of excitation coils
Stream can surface of test piece and it is internal generate alternating magnetic field, changing magnetic field can be inside test specimen and surface of test piece generates alternation whirlpool
Stream, vortex can be disturbed by test specimen internal flaw, be vortexed the secondary magnetic field inducted and detection signal can be by circle detection line
Circle pickup, by detection signal handle and be compared with the detection signal of zero defect test specimen, to judge present bit
It sets and whether there is defect；If there is defect, then the calibration curve of standard specimen is continued through i.e. it can be inferred that the reality of the defect
Border depth.
Beneficial effects of the present invention：
1, the present invention is used as excitation and detecting element using the circular vortex coil insensitive to direction, in actually detected process
In, the vortex of form excitation coil generation is overcome to crackle orientation-sensitive and is not easy to detect parallel with flowing to split
The problem of line defect, thus the occurrence of effective Crack prevention missing inspection.
2, twin coil incentive probe of the present invention is in such a way that sinusoidal bifrequency is ac-excited, the vortex of different frequency generation
Attenuation degree inside test specimen is not quite similar, and by the way that excitation parameters appropriate are arranged, so that test specimen surface point is generated anti-
To the vortex that can be cancelled out each other, to weaken surface of test piece vortex density, make the vortex density of material internal depths is opposite to become larger,
The detection signal for relatively increasing deep layer crackle increases the signal-to-noise ratio of detection signal, to effectively reduce the whirlpool of surface of test piece
The influence that adfluxion skin effect detects deep layer crack defect improves the detectability of vortex penetration depth and probe to deep torn grain,
On the basis of surface eddy density, 1.6 times or more when the penetration depth of double frequency excitation probe can reach single frequency excitation.
3, between the clearance distance S between double excitation coil of the present invention and the size and the detection performance of probe of probe closely
Correlation directly affects the testing result of deep torn grain, the detection depth for keeping suitable distance that can effectively improve probe to crackle.
Experiments have shown that setting the clearance distance of dual probe to S=(1.4-2) × R in the present inventiono, detectable crack defect its
Depth can reach 21mm or so.
4, double frequency excitation circular vortex probe using the present invention, detection efficiency is high, and it is low, sensitive to can avoid probe resolution ratio
The problems such as degree declines, detection speed is low.
5, double frequency excitation circular vortex probe using the present invention, solves and problems with exists in the prior art：Test specimen
Surface eddy kelvin effect influences the problem of deep torn grain defects detection；Detection signal is too small inside test specimen, can't detect internal lack
Sunken problem；It is small to be vortexed penetration depth, the eddy current probe problem low to the detectability of deep torn grain.
Description of the drawings
Fig. 1 is double frequency excitation probe installation diagram；
Fig. 2 is double frequency excitation probe detection scheme schematic diagram；
Fig. 3 is double frequency excitation probe vortex density change curve in two kinds of driving frequencies combinations of 5kHz, 20kHz；
Fig. 4 is single frequency excitation probe vortex density change curve when two kinds of driving frequencies of 5kHz, 20kHz encourage respectively；
Fig. 5 is double frequency excitation probe vortex density change curve in two kinds of driving frequencies combinations of 30kHz, 80kHz；
Fig. 6 is the vortex density change curve that single frequency excitation is popped one's head in when two kinds of driving frequencies of 30kHz, 80kHz encourage respectively.
Parts, position and number in figure：1- is excitation coil；2- is that excitation coil installs column；3- is detection coil；
4- is that detection coil installs column；5- is column fixed plate；6- is scanning component connection；7- is connecting plate；8- mounting holes；9-
For current source；10- is filter；11- is amplifier；12- is oscillograph；13- is test specimen；14- is scanning path；15- is to split
Line.
Specific implementation mode
Technical scheme of the present invention is described in detail below in conjunction with the accompanying drawings, but present disclosure is not limited to
This.
Embodiment 1：
As shown in Figure 1, a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect, it is characterised in that：Including swashing
Encourage probe assembly, detection probe component and fixed frame；The incentive probe component has two groups, centered on detection probe component,
Symmetrical distribution；Every group of the incentive probe component installs column 2 by 1 excitation coil 1 and 1 corresponding excitation coil
Composition, the excitation coil 1 are sleeved on excitation coil installation column 2；The detection probe component is by detection coil 3 and detection line
Circle installation column 4 forms, and the detection coil 3 is sleeved on detection coil installation column 4；The fixed frame is by column fixed plate 5
It is formed with scanning component connection 6, the column fixed plate 5 is fixedly connected with scanning component connection 6；The excitation coil peace
2 bottom end of column and 4 bottom end of detection coil installation column is filled to be mounted in column fixed plate 5.
The double frequency excitation circular vortex probe is detachably pacified entirely through the scanning component connection 6 with scanning component
Dress.
The detection probe component has one group, and 4 groups of column is installed by 1 detection coil 3 and 1 corresponding detection coil
At.
The excitation coil 1 and the detection coil 3 are circular vortex coil.
The diameter of the excitation coil 1 and corresponding excitation coil installation column 2 is respectively greater than the detection coil 3 and right
The diameter for the detection coil installation column 4 answered.
The excitation coil 1 is using sinusoidal bifrequency alternating current excitation.
The excitation coil 1 is sleeved on completely on excitation coil installation column 2, and top end face installs column 2 with excitation coil
Top end face is kept in the same plane, to keep the fixed relative position relation in detection process of excitation coil 1；
The detection coil 3 is sleeved on completely on detection coil installation column 4, top end face and 4 top of detection coil installation column
Face is kept in the same plane, to keep the fixed relative position relation in detection process of detection coil 3.
The scanning component connection 6 is connecting plate 7, and mounting hole 8 is provided on the connecting plate 7, and being used for will be described double
Frequency excitation circular vortex pops one's head in integral installation on scanning component.
The mounting hole 8 has 2, is symmetrically distributed in 7 left and right sides of connecting plate.
The excitation coil installation column 2, detection coil installation column 4 and fixed frame are made of PVC material.
The excitation coil 1 and detection coil 3 are formed by enameled wire coiling.
Clearance distance S=(1.4-2) × R between two groups of excitation coils 1o, RoFor the outer radius of excitation coil.
In two groups of excitation coils 1, the higher side excitation coil 1 of frequency matches smaller exciting current, frequency compared with
Larger exciting current is matched in low side, and size of current is maintained at the driving frequency being passed through thereto in each excitation coil 1
0.5-0.7 times.
By the installation diagram of 1 gained double frequency excitation probe assembly of embodiment, Fig. 1 is seen.
Embodiment 2：
As shown in Fig. 2, on the basis of embodiment 1, a kind of double frequency excitation circular vortex detection probe is to heavy wall deep torn grain defect
The method being detected, it is characterised in that：Include the following steps：
S1. by synchronous AC power supply 9, frequency and steady-state sine of different sizes excitation are continually fed into two groups of excitation coils 1
Electric current, the sinusoidal excitation current generate vortex field in metal plate test specimen 13；
S2. by scanning console, so that detection probe component is carried out C on 13 surface of test specimen and sweep, the vortex field of fault location is by scarce
Sunken disturbance is fed back to defect information in detection coil 3 by disturbed magnetic field；
S3. the detection signal in detection coil 3 is input in filter 10, height therein is filtered to remove using filter 10
Frequency noise；
S4. the detection signal for being filtered to remove high-frequency noise is input in amplifier 11, by amplifier 11 by faint detection
Signal amplifies, and is output to oscillograph 12；
S5. by 13 flaw indication of test specimen, real-time display comes out on oscillograph 12, finds defect, passes through the calibration of standard specimen
Curve goes out the actual grade of the defect by finite element analysis computation using ansys softwares.
Embodiment 3：
Penetration depth when being detected to heavy wall deep torn grain defect for verification double frequency excitation circular vortex detection probe is better than phase
Unifrequency incentive probe is answered, on the basis of embodiment 2, with two kinds of driving frequencies of 5kHz, 20kHz, unifrequency is carried out and encourages whirlpool
The penetration depth contrast experiment of stream probe and dual frequency excitation eddy current probe.
1. tested using double frequency excitation circular vortex detection probe, to the excitation line positioned at 3 left side of detection coil
The electric current that 5kHz, 1.3A are inputted in circle 1 inputs the electricity of 20kHz, 0.7A into the excitation coil 1 positioned at 3 right side of detection coil
Stream；The configuration parameter of dual frequency excitation eddy current probe, detection method and result are specific as follows：
1）Configure parameter
1. two groups of 1 basic sizes of excitation coil：Outer radius Ro=12mm, inside radius Ri=9mm, height H=6mm；
2. the driving frequency of two groups of excitation coils 1 is respectively：f left =5kHz and f right =20kHz
3. the exciting current size in two groups of excitation coils 1 is respectively：I left =1.3A and I right =0.7A
4. the distance between two groups of excitation coils 1：S=16mm
2）Detection method：
As shown in Fig. 2, according to the method in embodiment 2, it is detected；
3）Testing result：
By vortex density of 3 gained double frequency excitation circular vortex of the embodiment probe when two kinds of driving frequencies of 5kHz, 20kHz combine
Change curve is shown in Fig. 3, can be calculated by curve in Fig. 3, and when being combined using 5kHz and 20kHz driving frequencies, penetration depth can
To reach 21.28mm.
2. on the basis of Examples 1 and 2, one group of excitation coil 1 is only installed, using unifrequency encourage eddy current probe into
Row experiment.When being tested using single frequency excitation circular vortex detection probe, 5kHz, 0.7A are inputted into excitation coil 1 successively
Electric current and 20kHz, 0.7A electric current；1 basic size of excitation coil used, detection method and result are specific as follows：
1）1 basic size of excitation coil：Outer radius Ro=12mm, inside radius Ri=9mm, height H=6mm；
2）Detection method and result：
1. inputting frequency into excitation coil 1f 1 =5kHz, electric currentI 1 The steady-state sine exciting current of=0.7A, using with installation
Identical method is tested when two groups of excitation coils 1；Gained single frequency excitation circular vortex probe is encouraged in 5kHz driving frequencies
When vortex density change curve, see Fig. 4；It can be calculated by curve in Fig. 4, penetration depth when 5kHz unifrequencys encourage is
13.7mm；
2. inputting frequency into excitation coil 1f 2 =20kHz, electric currentI 2 =The steady-state sine exciting current of 0.7A, using with installation
Identical method is tested when two groups of excitation coils 1；Gained single frequency excitation circular vortex probe is encouraged in 20kHz driving frequencies
When vortex density change curve, see Fig. 4.It can be calculated by curve in Fig. 4, penetration depth when 20kHz unifrequencys encourage is
10.08mm。
3. double frequency excitation is compared with single frequency excitation testing result：
Penetration depth and single frequency excitation circle whirlpool of the double frequency excitation circular vortex probe when 5kHz and 20kHz driving frequencies combine
The comparison for flowing the penetration depth obtained by popping one's head in when two kinds of driving frequencies of 5kHz and 20kHz encourage respectively, is shown in Table 1：
It can be seen from the above result that using dual frequency excitation eddy current probe when 5kHz and 20kHz driving frequencies combine, penetration depth
Up to 21.28mm, gained penetration depth is encouraged respectively more than corresponding unifrequency.
Embodiment 4：
For the penetration depth for further verifying when double frequency excitation circular vortex detection probe is detected heavy wall deep torn grain defect
Better than corresponding unifrequency incentive probe, on the basis of embodiment 2, two kinds of driving frequencies of 30kHz, 80kHz are further used, are carried out
Unifrequency encourages the penetration depth contrast experiment of eddy current probe and dual frequency excitation eddy current probe.
1. tested using double frequency excitation circular vortex detection probe, to the excitation line positioned at 3 left side of detection coil
The electric current that 30kHz, 1.3A are inputted in circle 1 inputs the electricity of 80kHz, 0.7A into the excitation coil 1 positioned at 3 right side of detection coil
Stream；The configuration parameter of dual frequency excitation eddy current probe, detection method and result are specific as follows：
1）Configure parameter：
1. two groups of 1 basic sizes of excitation coil：Outer radius Ro=12mm, inside radius Ri=9mm, height H=6mm；
2. the driving frequency of two groups of excitation coils 1 is respectively：f left =30kHz and f right =80kHz
3. the exciting current size in two groups of excitation coils 1 is respectively：I left =1.3A and I right =0.7A
4. the distance between two groups of excitation coils 1：S=16mm
2）Detection method：
As shown in Fig. 2, according to the method in embodiment 2, it is detected；
3）Testing result：
It is close by vortex of 4 gained double frequency excitation circular vortex of the embodiment probe when two kinds of driving frequencies of 30kHz, 80kHz combine
Change curve is spent, Fig. 5 is seen, can be calculated by curve in Fig. 5, when being combined using 30kHz and 80kHz driving frequencies, infiltration is deep
Degree can reach 13.87mm.
2. on the basis of Examples 1 and 2, one group of excitation coil 1 is only installed, using unifrequency encourage eddy current probe into
Row experiment.When being tested using single frequency excitation circular vortex detection probe, 30kHz, 0.7A are inputted into excitation coil 1 successively
Electric current and 80kHz, 0.7A electric current；1 basic size of excitation coil used, detection method and result are specific as follows：
1）1 basic size of excitation coil：Outer radius Ro=12mm, inside radius Ri=9mm, height H=6mm；
2）Detection method and result：
1. being inputted into excitation coil 1f 1 =30kHz、I 1 The steady-state sine exciting current of=0.7A, using with installation two groups of excitations
Identical method is tested when coil 1；Gained single frequency excitation circular vortex probe is vortexed close when 30kHz driving frequencies encourage
Change curve is spent, sees Fig. 6.It can be calculated by curve in Fig. 6, penetration depth when 30kHz unifrequencys encourage is 8.663mm；
2. being inputted into excitation coil 1f 2 =80kHz、I 2 The steady-state sine exciting current of=0.7A, using with installation two groups of excitations
Identical method is tested when coil 1；Gained single frequency excitation circular vortex probe is vortexed close when 80kHz driving frequencies encourage
Change curve is spent, sees Fig. 6.It can be calculated by curve in Fig. 6, penetration depth when 80kHz unifrequencys encourage is 6.447mm.
3. double frequency excitation is compared with single frequency excitation testing result：
Penetration depth and single frequency excitation of the double frequency excitation circular vortex probe when 30kHz and 80kHz driving frequencies combine are round
Eddy current probe when two kinds of driving frequencies of 30kHz and 80kHz encourage respectively obtained by penetration depth comparison, be shown in Table 2：
It can be seen from the above result that using dual frequency excitation eddy current probe when 30kHz and 80kHz driving frequencies combine, infiltration is deep
Degree reaches 1.6 times or more of corresponding single frequency excitation probe gained penetration depth up to 13.87mm.
The above is only presently preferred embodiments of the present invention, not to limit the present invention interest field.It is any with this
The technical solution or any technical person familiar with the field that the interest field that claim is covered is implemented utilize
The method content of the disclosure above makes the scheme of many possible changes and modifications, all belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect, it is characterised in that：Including incentive probe group
Part, detection probe component and fixed frame；The incentive probe component has two groups, centered on detection probe component, in left and right pair
Claim distribution；Every group of the incentive probe component installs column (2) group by 1 excitation coil (1) and 1 corresponding excitation coil
At the excitation coil (1) is sleeved on excitation coil installation column (2)；The detection probe component is by detection coil (3) and inspection
Test coil is installed column (4) and is formed, and the detection coil (3) is sleeved on detection coil installation column (4)；The fixed frame is by standing
Column fixed plate (5) and scanning component connection (6) composition, the column fixed plate (5) and the fixed company of scanning component connection (6)
It connects；Excitation coil installation column (2) bottom end and detection coil installation column (4) bottom end are mounted on column fixed plate
(5) on.
2. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect as described in claim 1, feature exist
In：The double frequency excitation circular vortex probe is detachably installed entirely through the scanning component connection (6) with scanning component.
3. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect as described in claim 1, feature exist
In：The excitation coil (1) and the detection coil (3) are circular vortex coil；
The excitation coil (1) and corresponding excitation coil installation column (2) diameter be respectively greater than the detection coil (3) and
The diameter of corresponding detection coil installation column (4)；
The excitation coil (1) is using sinusoidal bifrequency alternating current excitation.
4. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect as described in claim 1, feature exist
In：The excitation coil (1) is sleeved on completely on excitation coil installation column (2), top end face and excitation coil installation column (2)
Top end face is kept in the same plane, to keep excitation coil (1) fixed relative position relation in detection process；
The detection coil (3) is sleeved on completely on detection coil installation column (4), and top end face installs column with detection coil
(4) top end face is kept in the same plane, to keep detection coil (3) fixed relative position relation in detection process.
5. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect as described in claim 1, feature exist
In：The scanning component connection (6) is connecting plate (7), and mounting hole (8) is provided on the connecting plate (7), and being used for will be described
Double frequency excitation circular vortex pops one's head in integral installation on scanning component.
6. a kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect as described in claim 1, feature exist
In：The excitation coil installation column (2), detection coil installation column (4) and fixed frame are made of PVC material；
The excitation coil (1) and detection coil (3) are formed by enameled wire coiling.
7. the side being detected to heavy wall deep torn grain defect with the double frequency excitation circular vortex detection probe described in claim 1-6
Method, it is characterised in that：Include the following steps：
S1. by synchronous AC power supply (9), frequency and stable state of different sizes are being continually fed into just into two groups of excitation coils (1)
String exciting current, the sinusoidal excitation current generate vortex field in metal plate test specimen (13)；
S2. by scanning console, so that detection probe component is carried out C on test specimen (13) surface and sweep, the vortex field of fault location by
The disturbance of defect is fed back to defect information in detection coil (3) by disturbed magnetic field；
S3. the detection signal in detection coil (3) is input in filter (10), it is filtered to remove using filter (10)
In high-frequency noise；
S4. the detection signal for being filtered to remove high-frequency noise is input in amplifier (11), it will be faint by amplifier (11)
Signal amplification is detected, oscillograph (12) is output to；
S5. by test specimen (13) flaw indication, real-time display comes out on oscillograph (12), finds defect, passes through standard specimen
Calibration curve calculates the actual grade of the defect.
8. the side that double frequency excitation circular vortex detection probe as claimed in claim 7 is detected heavy wall deep torn grain defect
Method, it is characterised in that：Clearance distance S=(1.4-2) × R between two groups of excitation coils (1)o, RoFor the outer radius of excitation coil.
9. the side that double frequency excitation circular vortex detection probe as claimed in claim 7 is detected heavy wall deep torn grain defect
Method, it is characterised in that：Clearance distance S=16mm between two groups of excitation coils (1).
10. the side that double frequency excitation circular vortex detection probe as claimed in claim 7 is detected heavy wall deep torn grain defect
Method, it is characterised in that：In two groups of excitation coils (1), the higher side excitation coil (1) of frequency matches smaller exciting current,
Larger exciting current is matched in the lower side of frequency, and size of current is maintained in each excitation coil (1) is passed through thereto
0.5-0.7 times of driving frequency.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406623A (en) * | 2018-12-30 | 2019-03-01 | 北方民族大学 | For detecting the round tangent eddy current probe and method of deep torn grain |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007108A1 (en) * | 2003-07-11 | 2005-01-13 | Teodor Dogaru | Probes and methods for detecting defects in metallic structures |
| AT502976A1 (en) * | 2004-07-02 | 2007-06-15 | Univ Graz Tech | DETECTION OF SURFACE FAILURES ON BARS, WIRES, AND TUBES USING SPINALS AND LOCATION COMPENSATION |
| US20090102473A1 (en) * | 2007-10-22 | 2009-04-23 | Soshi Narishige | Eddy current testing method and eddy current testing apparatus |
| CN102183579A (en) * | 2011-02-21 | 2011-09-14 | 南京农业大学 | Eddy current testing probe |
| CN103822967A (en) * | 2014-03-18 | 2014-05-28 | 江苏理工学院 | Double-excitation-coil conductor defect automatic flaw detection device and flaw detection method |
| CN104880508A (en) * | 2015-04-13 | 2015-09-02 | 北京理工大学 | Orthogonal rotation exciting field eddy current transducer |
| CN106645391A (en) * | 2016-10-10 | 2017-05-10 | 南京航空航天大学 | Multi-frequency eddy current testing system and method for evaluating carbon fiber plate defect depth |
| CN206515292U (en) * | 2017-02-08 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of differential excitation formula Eddy Current Testing Transducer |
| CN208076453U (en) * | 2018-04-20 | 2018-11-09 | 北方民族大学 | A kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect |
-
2018
- 2018-04-20 CN CN201810360807.4A patent/CN108344798B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007108A1 (en) * | 2003-07-11 | 2005-01-13 | Teodor Dogaru | Probes and methods for detecting defects in metallic structures |
| AT502976A1 (en) * | 2004-07-02 | 2007-06-15 | Univ Graz Tech | DETECTION OF SURFACE FAILURES ON BARS, WIRES, AND TUBES USING SPINALS AND LOCATION COMPENSATION |
| US20090102473A1 (en) * | 2007-10-22 | 2009-04-23 | Soshi Narishige | Eddy current testing method and eddy current testing apparatus |
| CN102183579A (en) * | 2011-02-21 | 2011-09-14 | 南京农业大学 | Eddy current testing probe |
| CN103822967A (en) * | 2014-03-18 | 2014-05-28 | 江苏理工学院 | Double-excitation-coil conductor defect automatic flaw detection device and flaw detection method |
| CN104880508A (en) * | 2015-04-13 | 2015-09-02 | 北京理工大学 | Orthogonal rotation exciting field eddy current transducer |
| CN106645391A (en) * | 2016-10-10 | 2017-05-10 | 南京航空航天大学 | Multi-frequency eddy current testing system and method for evaluating carbon fiber plate defect depth |
| CN206515292U (en) * | 2017-02-08 | 2017-09-22 | 中国航发沈阳发动机研究所 | A kind of differential excitation formula Eddy Current Testing Transducer |
| CN208076453U (en) * | 2018-04-20 | 2018-11-09 | 北方民族大学 | A kind of double frequency excitation circular vortex probe of detection heavy wall deep torn grain defect |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406622B (en) * | 2018-12-30 | 2023-09-12 | 北方民族大学 | Interlinked vortex probe and method for detecting opening fatigue and stress corrosion deep cracks |
| CN109406624A (en) * | 2018-12-30 | 2019-03-01 | 北方民族大学 | A kind of dual frequency array eddy current probe and deep torn grain mixing detection signal extraction technology |
| CN109406621A (en) * | 2018-12-30 | 2019-03-01 | 北方民族大学 | A kind of double frequency uniform turbulence probe and deep torn grain mixing detection signal extraction technology |
| CN109406622A (en) * | 2018-12-30 | 2019-03-01 | 北方民族大学 | The connecting ring type eddy current probe and method of detection opening fatigue and stress corrosion deep torn grain |
| CN109406623A (en) * | 2018-12-30 | 2019-03-01 | 北方民族大学 | For detecting the round tangent eddy current probe and method of deep torn grain |
| CN109406623B (en) * | 2018-12-30 | 2023-09-22 | 北方民族大学 | Circular tangential eddy current probe and method for detecting deep cracks |
| CN110375630A (en) * | 2019-07-23 | 2019-10-25 | 杭州申昊科技股份有限公司 | The adjustment structure of current vortex sensor |
| CN111272864A (en) * | 2020-02-28 | 2020-06-12 | 湖北工业大学 | Pulse eddy current detection system and method based on radial magnetic field |
| CN111780696A (en) * | 2020-07-14 | 2020-10-16 | 桂林电子科技大学 | Intelligent detection system for buried depth and defects of highway guardrail stand column |
| CN112034037A (en) * | 2020-09-25 | 2020-12-04 | 北方民族大学 | Novel eddy current synchronous detection method and probe for various defects |
| CN111929359B (en) * | 2020-09-25 | 2023-08-04 | 北方民族大学 | Layered defect eddy current detection probe excited by annular solenoid coil and method |
| CN111999380A (en) * | 2020-09-25 | 2020-11-27 | 北方民族大学 | Eddy current superposition probe for detecting layering defects and detection method |
| CN111929359A (en) * | 2020-09-25 | 2020-11-13 | 北方民族大学 | Layered defect eddy current detection probe excited by annular solenoid coil and method |
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