CN110095528A - Orthogonal rotation Eddy Inspection System - Google Patents
Orthogonal rotation Eddy Inspection System Download PDFInfo
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- CN110095528A CN110095528A CN201910373841.XA CN201910373841A CN110095528A CN 110095528 A CN110095528 A CN 110095528A CN 201910373841 A CN201910373841 A CN 201910373841A CN 110095528 A CN110095528 A CN 110095528A
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- 238000007689 inspection Methods 0.000 title claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 230000007547 defect Effects 0.000 claims description 16
- 230000002950 deficient Effects 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 230000006378 damage Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 239000000523 sample Substances 0.000 description 9
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 238000011158 quantitative evaluation Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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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
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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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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention provides a kind of orthogonal rotation Eddy Inspection System, including orthogonal current vortex defectoscope and signal handling equipment, and orthogonal current vortex defectoscope includes the iron core and array of electro-magnetic sensors of the omnidirectional distribution of shell and setting inside the shell.Defectoscope includes the iron core and array of electro-magnetic sensors of the omnidirectional distribution of shell and setting inside the shell；The iron core of omnidirectional distribution includes two identical U-shaped iron cores, is orthogonally separately fixed in shell；First iron core and the second iron core are wound with coil respectively；Array of electro-magnetic sensors is arranged by multiple Magnetic Sensors to be formed M*N and combines, for receiving the feedback signal of eddy current detection；Orthogonal rotation Eddy Inspection System of the invention can form the current vortex rotated in rail surface and sub-surface, and the current vortex for passing through rotation realizes complete detection.
Description
Technical field
The present invention relates to eddy current detection technical fields, especially to the eddy current detection of rail damage, specifically relate to
And a kind of orthogonal rotation Eddy Inspection System.
Background technique
The method for mainly having 4 kinds of rails to detect at present, cuts both ways.Manual identified: detection speed is slow, low precision, for
The work attainment of testing staff requires high；Ultrasonic examination: it is suitable for rail interiors and detects, and be highly prone to environmental factor
It influences；CCD line scan camera: detection accuracy is fast, is suitable for rail surface and detects, the influence vulnerable to rail surface impurity；Tradition
Current vortex flaw detection: being suitable for rail surface and sub-surface detects, and can accurately judge defective locations, but still not be able to achieve iron
The shape of rail defect, size, degree of injury quantitative evaluation.
The vortex that the probe of current most of current vortex rail defectoscopes generates all can be only done a certain type flaw
Crack detection, such as: transversal crack.And longitudinal crack is then difficult to measure, a possibility that this just directly results in missing inspection, and efficiency
Lowly.
The action of alternating magnetic field that conventional current vortex inspection technique is generated by alternating current is in conductive material to be detected a flaw, sense
Current vortex should be gone out.If defective in material, it will interfere generated current vortex, (forming interference signal).It is visited with vortex
Hurt instrument and detect its interference signal, so that it may know the situation of defect.There are many factor for influencing vortex, that is are loaded in vortex rich
Rich signal, these signals are related with the several factors of material, and wherein useful signal is separated one by one from many signals
Out, it will be able to realize the judgement to defect condition.For the shape of defect, size, degree of injury quantitative evaluation but without
It can be power.
Summary of the invention
Present invention seek to address that the problem of missing inspection in the prior art, propose a kind of orthogonal rotation Eddy Inspection System,
The current vortex of a rotation is formed in rail surface and sub-surface, detection is realized by the current vortex of rotation.
Above-mentioned purposeful to realize, the technical solution adopted in the present invention is as follows:
Orthogonal rotation Eddy Inspection System, including orthogonal current vortex defectoscope and signal handling equipment, positive alternating current whirlpool
Stream defectoscope includes the iron core and array of electro-magnetic sensors of the omnidirectional distribution of shell and setting inside the shell；
The iron core of the omnidirectional distribution includes two identical U-shaped iron cores, respectively the first iron core and the second iron core, orthogonal
Ground is separately fixed in shell, and the first iron core and the second iron core are orthogonal position distribution and there are gaps between；
It is wound with coil on each iron core in the iron core of the omnidirectional distribution, it is each as current vortex generating device
Group coil passes through winding wire respectively and constitutes independent circuit and be drawn out to the outside of shell, connect with ac driven circuit；Its
Middle ac driven circuit has signal generating circuit, and two sine wave signals for being 90 degree for generating phase difference are activated to two
Group coil, so that two groups of coils generate the current vortex of rotation；
Wherein, the array of electro-magnetic sensors is arranged by multiple Magnetic Sensors forms M*N and combines, for receiving current vortex inspection
The feedback signal of survey, wherein M and N is the positive integer more than or equal to 1, and the lower surface of the array of electro-magnetic sensors with just
Hand over the free end of the U-shaped iron core side of distribution in same plane；
The array of electro-magnetic sensors is drawn out to the outside of shell via extraction wire, electrically connects with signal handling equipment
It connects；
The signal handling equipment includes the signal conditioning circuit being sequentially connected electrically, AD Acquisition Circuit and image reconstruction electricity
Road, the signal conditioning circuit receive the signal of array of electro-magnetic sensors output, carry out phase demodulation, amplification and Shape correction, defeated
AD Acquisition Circuit is arrived out；Analog quantity is transformed into digital quantity by AD Acquisition Circuit；Image reconstruction circuitry is based on array type Magnetic Sensor
It detects that the digital quantity that the magnetic field detection signal of relevant position obtains carries out image reconstruction, obtains defective patterns.
Preferably, the shell includes upper housing, lower case and extension, and extension is fixed with upper housing, lower case
It is removably fixed with upper housing, wherein iron core, coil and the array of electro-magnetic sensors of the omnidirectional distribution are pacified
In lower case.
Preferably, the corresponding extraction wire of the Magnetic Sensor and the corresponding winding wire of coil are pooled to described
Through being drawn by the line outlet of extension after extension.
Preferably, the inside of the lower case, in the side far from upper housing be further fixed on a pcb board, the electromagnetism passes
Sensor array is arranged on the pcb board.
Preferably, it is provided with wire casing between the iron core of the omnidirectional distribution and the inner wall of shell, for the extraction wire
It passes through.
Preferably, the shell is ferrous material preparation.
Preferably, the signal generating circuit by adjust output signal type, signal phase, signal amplitude peak value and
Signal frequency generates two sine wave signals that phase difference is 90 degree, magnitude peak 5V, frequency 1KHz.
Preferably, two sine wave signals application that the phase difference that the signal generator generates is 90 degree is activated to described
Coil on, the current vortex of rotation is formed in surface to be detected or sub-surface, when encountering defective place, due to defect
There is an inhibition at position to rotation current vortex, and the feedback magnetic field that rotation current vortex generates will be with zero defect when institute feedback signal not
Together, by using the three axis electromagnetic sensors of model AMI306R detect feedback signal.
Preferably, the signal conditioning circuit includes phase discriminator, amplifying circuit and shaping circuit, wherein phase discriminator
For the phase of detection circuit signal, judge whether phase changes；The amplifying circuit is used to carry out signal to signal to put
Big processing, exports the voltage signal of amplification；Shaping circuit carries out signal shaping to the voltage signal that amplifying circuit exports, and will export
Waveform is modified processing, is then output to AD Acquisition Circuit.
Preferably, the coiling of the coil is using any one in following manner:
1) in the groove portion position of the first iron core and the second iron core, coiling is distinguished positioned at the position being overlapped mutually, in two iron
A coil is respectively formed on core；
2) coiling is distinguished in the opposite end position of each iron core, a pair of of coil of coiling constitutes one group on each iron core
Coil.
Compared with prior art, orthogonal rotation Eddy Inspection System of the invention passes through two groups of orthogonal iron cores and line
Circle is used as current vortex generating device, and two sine wave exciting signals for being 90 degree by applying phase difference make probe can be in iron
Track surface and sub-surface form the current vortex of a rotation, if defective in rail detected, the testing result of probe
It will change and (form interference signal), i.e., detected by array of magnetic sensors, complete rail surface and sub-surface
Different type defect detection, in favor of can effectively be visualized to rail damage, the classification of quantification assessment.
Notice can effectively and rapidly damage into identification different type using array MI magnetic sensing and detecting system, reduce
Influence of the complex defect to eddy current signal improves the accuracy that indicated range determines.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this
It can be viewed as a part of the subject matter of the disclosure in the case that the design of sample is not conflicting.In addition, required guarantor
All combinations of the theme of shield are considered as a part of the subject matter of the disclosure.
Can be more fully appreciated from the following description in conjunction with attached drawing present invention teach that the foregoing and other aspects, reality
Apply example and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the invention will be below
Description in it is obvious, or learnt in practice by the specific embodiment instructed according to the present invention.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, identical or nearly identical group each of is shown in each figure
It can be indicated by the same numeral at part.For clarity, in each figure, not each component part is labeled.
Now, example will be passed through and the embodiments of various aspects of the invention is described in reference to the drawings, in which:
Fig. 1 is the schematic diagram of the defectoscope of orthogonal rotation Eddy Inspection System of the invention.
Fig. 2 is the circuit theory schematic diagram of the signal handling equipment of orthogonal rotation Eddy Inspection System of the invention.
Fig. 3 is 90 degree of phase phase difference of two sine wave signal schematic diagrames that signal generator generates.
Fig. 4 is the corresponding phase diagram of two signals.
Fig. 5 is the schematic diagram of the rotation current vortex generated.
Fig. 6-9 is an implementation of the orthogonal shaped iron core and coiling of orthogonal rotation Eddy Inspection System of the invention
The schematic diagram of example.
Figure 10-12 be orthogonal rotation Eddy Inspection System of the invention orthogonal shaped iron core and coiling another
The schematic diagram of embodiment.
Specific embodiment
In order to better understand the technical content of the present invention, special to lift specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
Various aspects with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.
It is not intended to cover all aspects of the invention for embodiment of the disclosure.It should be appreciated that a variety of designs and reality presented hereinbefore
Those of apply example, and describe in more detail below design and embodiment can in many ways in any one come it is real
It applies, this is because conception and embodiment disclosed in this invention are not limited to any embodiment.In addition, disclosed by the invention one
A little aspects can be used alone, or otherwise any appropriately combined use with disclosed by the invention.
As shown in Figure 1, Figure 2, a kind of orthogonal rotation Eddy Inspection System of the invention, including defectoscope and signal
Processing equipment, defectoscope have the iron core of shell and setting omnidirectional distribution inside the shell, array of electro-magnetic sensors and around
System constitutes detection probe in iron core coil, iron core and coil.Just by apply that phase differences are 90 degree to two groups of coils two
String wave excitation signal, exciting current make coil generate the current vortex of rotation, realize comprehensive detection to damage.
As shown in connection with fig. 1, the shell of defectoscope includes upper housing 10a, lower case 10b and extension 10c, extension
10c is fixed with upper housing 10a, the prominent upper housing 10a of extension.
Lower case 10b is removably fixed with upper housing 10a, such as with the snap-in structure with limit in diagram.
In conjunction with Fig. 1, the iron core of omnidirectional distribution includes two identical U-shaped iron cores, respectively the first iron core 1a and the second iron
Core 1b, is orthogonally separately fixed in shell, inside especially lower case 10b.
First iron core 1a and the second iron core 1b is orthogonal position distribution and there are gaps between.
It is corresponding that one group of coil 3a and another group of coil 3b, difference is respectively set on first iron core 1a and the second iron core 1b
Iron core on corresponding coil (i.e. two groups of coils) be used as current vortex generating device.
Two groups of coils pass through respective winding wire respectively and constitute independent circuit and be drawn out to the outside of shell, with excitation
Circuit connection, i.e. ac driven circuit.
As shown in connection with fig. 2, ac driven circuit has signal generating circuit, has signal generator and phase discriminator, signal
Generator is used to generate the signal of 50-100KHz, two sine-wave excitations that phase discriminator is 90 degree to phase demodulation phase difference output
Signal is applied on corresponding two groups of coils.
Optionally, signal generating circuit is by adjusting output signal type, signal phase, signal amplitude peak value and signal
Frequency generates two sine wave signals that phase difference is 90 degree, magnitude peak 5V, frequency 1KHz.
Preferably, buffer is additionally provided between phase discriminator and coil.
For array of electro-magnetic sensors by multiple Magnetic Sensors 2, arrangement forms M*N combination, the i.e. combining form of M row, N column, connects
Receive the feedback signal of eddy current detection.M and N is the positive integer more than or equal to 1.The lower surface of array of electro-magnetic sensors with it is orthogonal
The free end of the U-shaped iron core side of distribution is in same plane.
Array of electro-magnetic sensors is drawn out to the outside of shell via extraction wire, is electrically connected with signal handling equipment.
In embodiment above-mentioned, by orthogonal U-shaped iron core, the coiling basis of coil is provided, magnet accumulating cap is played, prevents
The excessive leakage in magnetic field, to reduce the loss of energy.
Magnetic Sensor of the currently preferred three axis electromagnetic sensors using AMI306R as feedback detection, detects
Its interference signal, to determine the situation of defect.
In conjunction with Fig. 1, the weight of the iron core of omnidirectional distribution, coil and Magnetic Sensor is relatively light, and it is small-sized to be conducive to whole equipment
Change design.Iron core and pcb board are all made of adhesive fixed to shell.
Preferably, shell is ferrous material preparation, to be electromagnetically shielded, avoids external magnetic field to the shadow of defect-detecting equipment
It rings.
In conjunction with Fig. 1, it is preferable that the corresponding extraction wire of Magnetic Sensor 2 and the corresponding winding wire of coil are pooled to
Then extension 10c is drawn via the line outlet of extension 9 again.In diagram, with the conducting wire of the unified mark extraction of label 11.
Such as Fig. 1, the inside of lower case 10b is further fixed on a pcb board 5, electromagnetic sensor battle array in the side far from upper housing
Column are arranged on the pcb board, to realize the fixed installation to sensor array.
Preferably, wire casing (not identifying label) is provided between the iron core of omnidirectional distribution and the inner wall of shell, for drawing
Conducting wire passes through.In this way, the extraction channel of conducting wire is reasonably arranged in partial region inside the shell, it is pooled to extension together
It is interior, extraction is uniformly summarized by extension.
As shown in connection with fig. 2, signal handling equipment includes the signal conditioning circuit being sequentially connected electrically, AD Acquisition Circuit and figure
As reconfigurable circuit.
Signal conditioning circuit receives the multipath output signals of array of electro-magnetic sensors output, carries out phase demodulation, amplification and whole
Shape processing, is output to AD Acquisition Circuit.
Analog quantity is transformed into digital quantity by AD Acquisition Circuit.
Image reconstruction circuitry detects the number that the magnetic field detection signal of relevant position obtains based on array type Magnetic Sensor
Amount carries out image reconstruction, obtains defective patterns.
In conjunction with Fig. 1, when coil leads to a pulse signal, winding coil will generate magnetic field, and the present invention is by applying phase
Two sine-wave excitations that potential difference is 90 degree, so that coil generation is applied to surface to be detected (such as rail) and sub-surface shape
At the current vortex of rotation, if defective in rail detected, the testing result of probe, which will change, (forms interference
Signal).
In conjunction with shown in Fig. 3,4,5, Fig. 3 is 90 degree of phase phase difference of two sine wave signals that signal generator generates.?
5 points are taken above, are 0 degree respectively, 45 degree, 90 degree, 135 degree, 180 degree, the abscissa of first sine wave corresponding diagram 5, second
The ordinate of a sine wave corresponding diagram 5, when X-axis is 0 degree, the corresponding value of first sine wave is 0, and second sine wave is corresponding
Value be -5, the current vortex generated at this time is the 5th figure in Fig. 5, and direction is downward.When X-axis is 45 degree, first sine wave
Corresponding value is 2.5 √ 2, and the corresponding value of second sine wave is -2.5 √ 2, and the current vortex generated at this time is the 4th in Fig. 5
Figure, direction is to bottom right.And so on, meet in rotation current vortex and Fig. 4 corresponding to the figure of Fig. 5.If by each in X-axis
A coordinate points are all drawn, then form the current vortex of a rotation.
In conjunction with Fig. 2-5, two sine wave signals application that the phase difference that signal generator generates is 90 degree is activated to described
Coil on, the current vortex of rotation is formed in surface to be detected or sub-surface, when encountering defective place, due to defect
There is an inhibition at position to rotation current vortex, and the feedback magnetic field that rotation current vortex generates will be with zero defect when institute feedback signal not
Together, by using the three axis electromagnetic sensors of model AMI306R detect feedback signal.
In the particular embodiment, signal conditioning circuit includes phase discriminator, amplifying circuit and shaping circuit.
Phase discriminator is used for the phase of detection circuit signal, judges whether phase changes, and input is sent out from signal
Raw device, is inputted, the signal of output is the sine wave signal of 90 degree of two-way phase phase difference in the form of sine wave.
The amplifying circuit is used to carry out signal enhanced processing to signal, exports the voltage signal of amplification.
Shaping circuit carries out signal shaping to the voltage signal that amplifying circuit exports, and output waveform is modified processing,
It is then output to AD Acquisition Circuit.
During carrying out flaw detection, as shown in connection with fig. 2, its implementation process is briefly described below:
1) by the way that with signal generator, by adjusting output signal type, signal phase, signal amplitude peak value, signal is frequently
Rate, generates two sine wave signals that phase difference is 90 degree, magnitude peak 5V, and frequency is 1K HZ；
2) two sine wave signals that the phase difference generated by signal generator is 90 degree lead to the coil in sensor probe
On, the current vortex of rotation is formed on the rail of detection, when encountering defective place, since rejected region is to electric rotating whirlpool
Stream has inhibition, and the feedback magnetic field that rotation current vortex generates will be different from zero defect when institute's feedback signal, with AMI306R's
Three axis electromagnetic sensors detect feedback signal；
3) by the signal of tri- axis electromagnetic sensor of AMI306R output by signal conditioning circuit (phase demodulation, amplification, shaping electricity
Road), for AD conversion；
4) DSP acquires AD data-signal (analog quantity is converted to digital quantity), is analyzed and is handled.
5) by treated, data are output to host computer (such as embedded host), reconstruct damage figure.
As shown in connection with fig. 1, it is preferable that the winding method of 2 groups of coils of the invention using it is following any one:
1) in the groove portion position of the first iron core and the second iron core, coiling is distinguished positioned at the position being overlapped mutually, in two iron
A coil is respectively formed on core；
2) coiling is distinguished in the opposite end position of each iron core, a pair of of coil of coiling constitutes one group on each iron core
Coil.
Coil shown in Fig. 6-9 is one of coiling.
In conjunction with shown in Fig. 6-9, the groove portion position of the first iron core 1a and the second iron core 1b are distinguished positioned at the position being overlapped mutually
Coiling is respectively formed coil a 3a and 3b on two iron cores, applies excitation respectively.
Figure 10-12 shows another coiling.
In conjunction with Figure 10-12, coiling is distinguished in the opposite end position of each iron 1a, 1b, the one of coiling on each iron core
One group of coil is constituted to coil, 2 groups of coils are correspondingly formed on two iron cores, applies excitation respectively.
Orthogonal rotation Eddy Inspection System of the invention, forms the current vortex of rotation in object being measured, especially can
Rail surface and the different types of defect of sub-surface are enough detected, and environmental variance can be effectively prevented to traditional detection hand
The influence of section method of detection such as ultrasonic wave, CCD line scan camera.
Equipment performance is as follows:
1. crack position positions: error is no more than 1mm
2. crack shape reconstructs size: error is less than 2mm
3. surface damage position: error is no more than 2mm
4. surface damage Shape Reconstruction size: error is less than 2mm
The depth 5. rail surface is detected a flaw: ≈ 2mm rail surface and sub-surface crackle, fatigue damage (early defect)
6. rail surface detects speed: 3KM/H when portable detection；153KM/H7. detection device makes when train detection of detecting a flaw
With temperature: -40 DEG C~60 DEG C
Compared with prior art, orthogonal rotation Eddy Inspection System of the invention passes through two groups of orthogonal iron cores and line
Circle is used as current vortex generating device, makes probe that can form the current vortex rotated in rail surface and sub-surface, if
Defective in rail detected, the testing result of probe will change and (form interference signal), i.e., sensed by magnetic
Device array detection comes out, and the detection of the different type defect of rail surface and sub-surface is completed, so that the later period can be effectively
Rail damage is visualized, the classification of quantification assessment.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (10)
1. a kind of orthogonal rotation Eddy Inspection System, which is characterized in that including orthogonal current vortex defectoscope and signal processing
Equipment, orthogonal current vortex defectoscope include the iron core and electromagnetic sensor battle array of the omnidirectional distribution of shell and setting inside the shell
Column；
The iron core of the omnidirectional distribution includes two identical U-shaped iron cores, respectively the first iron core and the second iron core, is orthogonally divided
Gu Ding not inside the shell, the first iron core and the second iron core are orthogonal position distribution and there are gaps between；
It is wound with coil on each iron core in the iron core of the omnidirectional distribution, as current vortex generating device, each group of line
Circle constitutes independent circuit by winding wire respectively and is drawn out to the outside of shell, connect with ac driven circuit；Wherein hand over
Flowing exciting circuit has signal generating circuit, and two sine wave signals for being 90 degree for generating phase difference are activated to two groups of lines
Circle, so that two groups of coils generate the current vortex of rotation；
Wherein, the array of electro-magnetic sensors is arranged by multiple Magnetic Sensors forms M*N and combines, for receiving eddy current detection
Feedback signal, wherein M and N is the positive integer more than or equal to 1, and the lower surface of the array of electro-magnetic sensors with orthogonal point
The free end of the U-shaped iron core side of cloth is in same plane；
The array of electro-magnetic sensors is drawn out to the outside of shell via extraction wire, is electrically connected with signal handling equipment；
The signal handling equipment includes the signal conditioning circuit being sequentially connected electrically, AD Acquisition Circuit and image reconstruction circuitry,
The signal conditioning circuit receives the signal of array of electro-magnetic sensors output, carries out phase demodulation, amplification and Shape correction, is output to
AD Acquisition Circuit；Analog quantity is transformed into digital quantity by AD Acquisition Circuit；Image reconstruction circuitry is detected based on array type Magnetic Sensor
The digital quantity obtained to the magnetic field detection signal of relevant position carries out image reconstruction, obtains defective patterns.
2. orthogonal rotation Eddy Inspection System according to claim 1, which is characterized in that the shell includes upper casing
Body, lower case and extension, extension are fixed with upper housing, and lower case is removably fixed with upper housing, wherein institute
Iron core, coil and the array of electro-magnetic sensors for the omnidirectional distribution stated are installed in lower case.
3. orthogonal rotation Eddy Inspection System according to claim 2, which is characterized in that the Magnetic Sensor is corresponding
Extraction wire and the corresponding winding wire of coil are pooled to after the extension through being drawn by the line outlet of extension.
4. orthogonal rotation Eddy Inspection System according to claim 2, which is characterized in that the inside of the lower case,
It is further fixed on a pcb board in the side far from upper housing, the array of electro-magnetic sensors is arranged on the pcb board.
5. orthogonal rotation Eddy Inspection System according to claim 1, which is characterized in that the iron core of the omnidirectional distribution
It is provided with wire casing, between the inner wall of shell so that the extraction wire passes through.
6. orthogonal rotation Eddy Inspection System according to claim 1, which is characterized in that the shell is irony material
Material preparation.
7. orthogonal rotation Eddy Inspection System according to claim 1, which is characterized in that the signal generating circuit is logical
Overregulate output signal type, signal phase, signal amplitude peak value and signal frequency, two for generating that phase difference is 90 degree are just
String wave signal, magnitude peak 5V, frequency 1KHz.
8. orthogonal rotation Eddy Inspection System according to any one of claims 1-7, which is characterized in that the letter
Two sine wave signals that the phase difference that number generator generates is 90 degree apply on the coil described in being activated to, on surface to be detected
Or sub-surface forms the current vortex of rotation, when encountering defective place, since rejected region has resistance to rotation current vortex
Hinder effect, the feedback magnetic field that rotation current vortex generates will be different from zero defect when institute's feedback signal, by using model
The three axis electromagnetic sensors of AMI306R detect feedback signal.
9. orthogonal rotation Eddy Inspection System according to claim 8, which is characterized in that the signal conditioning circuit packet
Phase discriminator, amplifying circuit and shaping circuit are included, wherein phase discriminator is used for the phase of detection circuit signal, judges that phase is
It is no to change；The amplifying circuit exports the voltage signal of amplification for amplifying processing to signal；Shaping circuit is to putting
The voltage signal of big circuit output carries out signal shaping, and output waveform is modified processing, is then output to AD Acquisition Circuit.
10. orthogonal rotation Eddy Inspection System according to claim 1, which is characterized in that the coiling of the coil is adopted
With any one in following manner:
1) in the groove portion position of the first iron core and the second iron core, coiling is distinguished positioned at the position being overlapped mutually, on two iron cores
It is respectively formed a coil；
2) coiling is distinguished in the opposite end position of each iron core, a pair of of coil of coiling constitutes one group of line on each iron core
Circle.
Priority Applications (1)
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