CN106855521A - A kind of micro- deformation detecting device of rail web of the rail face crack and detection method - Google Patents
A kind of micro- deformation detecting device of rail web of the rail face crack and detection method Download PDFInfo
- Publication number
- CN106855521A CN106855521A CN201710126822.8A CN201710126822A CN106855521A CN 106855521 A CN106855521 A CN 106855521A CN 201710126822 A CN201710126822 A CN 201710126822A CN 106855521 A CN106855521 A CN 106855521A
- Authority
- CN
- China
- Prior art keywords
- coupler
- light
- rail
- acquisition circuit
- signal acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/161—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
- G01N2021/458—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods using interferential sensor, e.g. sensor fibre, possibly on optical waveguide
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
- G01N2201/082—Fibres for a reference path
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
- G01N2201/088—Using a sensor fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of micro- deformation detecting device of rail web of the rail face crack and detection method, including wideband light source, the first coupler, reference arm, the first sample arm, the second sample arm, the first signal acquisition circuit and secondary signal Acquisition Circuit；The light of wideband light source is by being divided into reference light and flashlight after the first coupler, reference light after first annular device by reaching piezoelectric ceramics, first annular device outgoing is returned after piezoelectric ceramics surface is reflected, is divided into by the second coupler and the first signal acquisition circuit and secondary signal Acquisition Circuit is had respectively entered after two-way outgoing reference light；Flashlight after the 3rd coupler by being divided into two paths of signals light, two paths of signals light is respectively through arrival rail web of the rail surface after corresponding first sample arm, the second sample arm, outgoing is returned to after rail web of the rail surface is reflected, two-way output signal light enters into the first signal acquisition circuit and secondary signal Acquisition Circuit.The present invention uses non-contact optical Low coherence defect inspection method, realizes quick detection and localization over long distances.
Description
Technical field
The invention belongs to field of non destructive testing, and in particular to a kind of micro- deformation detecting device of rail web of the rail face crack and inspection
Survey method.
Background technology
China is classified according to the hurt species of rail, hurt position and hurt reason, is divided into 9 class, 32 kinds of hurts,
And use two-digit number, tens to represent hurt position and state, units represents the reason for causing hurt.Train rail is shy with strangers
Rust, exposes to the sun and rain, train waste discharge is the main cause for causing rail to get rusty, even if railway workman keeps daily daily
Maintenance, oiling (having locomotive oiling and artificial oiling), but infringement of the corrosion to rail is still very big.Corrosion can at leisure corrode rail
Rail level, is cut out the shape that is uneven by face, and some places will start chip off-falling, and to a certain extent, rail level will become concavo-convex to chip off-falling
Injustice, some edges can be collapsed, and train will jolt when such wheel is opened.
The rail damage detection method applied has the methods such as electromagnetic test, electric capacity, laser infrared, with optical measurement
The advantage of the structure of technology without wound property and measurement accuracy is highlighted, and optical measuring technique has been widely used for production industry
Every field.Current University Of Tianjin's Precision Inspection and instrument National Key Laboratory to the spectral domain based on low phase drying method with
And frequency sweep domain is all studied, Main Achievements are the tomography area research that object can be penetrated to light.
The content of the invention
For how carrying out high speed detection problem to long range track crack defect, the present invention propose it is a kind of based on high speed when
The micro- deformation detecting device of rail web of the rail face crack and method of domain Low coherence, measure by common time domain Michelson interference
Method is improved, and eliminates the influence of the light source light power vibration error and reference arm path-length error of script, can reduce damage
The scope of positioning, conveniently carries out higher precision and more accurate damage position is searched.
Above-mentioned technical purpose is realized, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of micro- deformation detecting device of rail web of the rail face crack, including wideband light source, the first coupler, reference arm,
One sample arm, the second sample arm, the first signal acquisition circuit and secondary signal Acquisition Circuit；
The reference arm includes piezoelectric ceramics；The light of the wideband light source is by being divided into reference light and letter after the first coupler
Number light, the reference light returns to the first ring by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Shape device outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered the first letter
Number Acquisition Circuit and secondary signal Acquisition Circuit；The flashlight is by being divided into two paths of signals light, two-way letter after the 3rd coupler
Number light is anti-by rail web of the rail surface respectively through rail web of the rail surface is reached after corresponding first sample arm, the second sample arm
Corresponding first sample arm, the second sample arm outgoing are returned to after penetrating, two-way output signal light has respectively entered the first signal and adopts
Collector and secondary signal Acquisition Circuit.
Further, first signal acquisition circuit and secondary signal Acquisition Circuit include the 4th coupling being sequentially connected
Clutch, photodetector, data collecting card, the 4th coupler are used to receive reference light and output signal light.
Further, the photodetector is balance amplification photodetector.
Further, first sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；
The second circulator in first sample arm respectively with the 3rd coupler and the first signal acquisition circuit in the 4th coupler
It is connected；The second circulator in second sample arm respectively with the 3rd coupler and secondary signal Acquisition Circuit in the 4th coupling
Clutch is connected.
Further, the data collecting card uses the data collecting card of model USB6211.
A kind of micro- deformation detecting method of rail web of the rail face crack, comprises the following steps：
(1) light of wideband light source is divided into reference light and flashlight by the first coupler；
(2) reference light returns to first by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Circulator outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered first
Signal acquisition circuit and secondary signal Acquisition Circuit；
(3), by being divided into two paths of signals light after the 3rd coupler, two paths of signals light is respectively through corresponding first for flashlight
Rail web of the rail surface is reached after sample arm, the second sample arm, corresponding first sample is returned to after rail web of the rail surface is reflected
Product arm, the second sample arm outgoing, two-way output signal light have respectively entered the first signal acquisition circuit and secondary signal collection electricity
Road；
(4) two-way outgoing reference light is interfered with corresponding output signal light respectively, is carried out respectively by photodetector
Data collecting card is sent to after opto-electronic conversion carries out data acquisition, and finally passing to computer carries out data processing.
Further, first signal acquisition circuit and secondary signal Acquisition Circuit include the 4th coupling being sequentially connected
Clutch, photodetector, data collecting card, the 4th coupler are used to receive two-way outgoing reference light and two-way output signal light.
Further, first sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；
The second circulator in first sample arm respectively with the 3rd coupler and the first signal acquisition circuit in the 4th coupler
It is connected；The second circulator in second sample arm respectively with the 3rd coupler and secondary signal Acquisition Circuit in the 4th coupling
Clutch is connected.
Further, first coupler, the second coupler and the 3rd coupler are 1x2 couplers；Described 4th
Coupler is 2x2 couplers.
Further, the step (4) specifically includes following steps：
4.1 two-way outgoing reference lights are interfered with corresponding output signal light respectively, form two-way interference signal；
4.2 opto-electronic conversion is carried out to two-way interference signal using photodetector after be sent to data collecting card, Ran Hou
It is sent to computer；
4.3 computers carry out denoising to two-way interference signal first, DC terms and from after coherent term removal, Ran Houli
Phase shift is carried out to the two-way interference signal obtained on the first signal acquisition circuit and secondary signal Acquisition Circuit with phase shift subtractive method
After subtract each other, so as to the signal stablized, when unstable signal is detected, illustrate that crack damage occurs in the rail web of the rail so that
Realize the accurate detection damaged.
Beneficial effects of the present invention：
1st, the present invention uses non-contact optical Low coherence defect inspection method, realizes quick detection and localization over long distances；
2nd, the present invention is detected using the signal of Low coherence, can reach the displacement measurement of higher precision, therefore for
The fine crack of early stage is more readily detected, and can ahead of time exclude potential safety hazard；
3rd, the change of displacement difference can be detected in the present invention by interference signal all the way, that is, is detected whether rail occurs in that and is split
Line, corrosion pitting etc.；Combined with two-way interference signal by by phase shift subtractive method, it may be determined that whether the rail web of the rail bending occurs
The deformation of degree, more fully can be analyzed to type of impairment.
Brief description of the drawings
Fig. 1 is the structural representation of the micro- deformation detecting device of rail web of the rail face crack of the invention；
The cross-sectional structure schematic diagram of Fig. 2 rails；
Fig. 3 is the schematic diagram that interference signal is produced.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail below in conjunction with the accompanying drawings.
Embodiment one
As Figure 1-3, a kind of micro- deformation detecting device of rail web of the rail face crack, including wideband light source, the first coupling
Device, reference arm, the first sample arm, the second sample arm, the first signal acquisition circuit and secondary signal Acquisition Circuit；
The reference arm includes piezoelectric ceramics；The light of the wideband light source is by being divided into reference light and letter after the first coupler
Number light, the reference light returns to the first ring by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Shape device outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered the first letter
Number Acquisition Circuit and secondary signal Acquisition Circuit；The flashlight is by being divided into two paths of signals light, two-way letter after the 3rd coupler
Number light is anti-by rail web of the rail surface respectively through rail web of the rail surface is reached after corresponding first sample arm, the second sample arm
Corresponding first sample arm, the second sample arm outgoing are returned to after penetrating, two-way output signal light has respectively entered the first signal and adopts
Collector and secondary signal Acquisition Circuit.
Preferably, first signal acquisition circuit and secondary signal Acquisition Circuit include the 4th coupling being sequentially connected
Device, photodetector, data collecting card, the 4th coupler are used to receive two-way outgoing reference light and two-way output signal light.
Preferably, first sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；Institute
State the second circulator in the first sample arm respectively with the 3rd coupler and the first signal acquisition circuit in the 4th coupler phase
Even；The second circulator in second sample arm is coupled with the 4th in the 3rd coupler and secondary signal Acquisition Circuit respectively
Device is connected；Optical fiber realizes quick detection and localization over long distances.
Preferably, the model USB6211 of the data collecting card.
In the present embodiment, the first coupler, the second coupler and the 3rd coupler are：1x2 couplers；4th coupling
Device is 2x2 couplers.
In sum, the specific work process of the micro- deformation detecting device of rail web of the rail face crack is：
First with wideband light source, the first coupler, reference arm, the first sample arm, the second sample arm, the first signal acquisition
Circuit and secondary signal Acquisition Circuit produce the interference signal of two-way Low coherence；
DC terms are removed to two-way interference signal and from after the interference of coherent term, obtain the interference signal after denoising；
Because the sample arms of two represent different web of the rail positions respectively, and reference arm is same reference arm, when web of the rail table
When face is formation state, displacement difference should be fixed between two-way interference signal, when this fixed value changes, then demonstrate,prove
The clear web of the rail there occurs deformation, so as to detect whether rail occurs in that crackle, corrosion pitting etc.；By by phase shift subtractive method and two
Road interference signal is combined, it may be determined that whether the rail web of the rail deformation of degree of crook occurs, can more fully to type of impairment
It is analyzed.
Embodiment two
From physical optics, frequency is identical, direction of vibration is identical, phase except must being fulfilled for for the two row light waves for interfering
Outside the primary condition such as potential difference is constant, it is necessary to meet optical path difference this adequate condition, low phase within the coherence length of light source
Interference is produced using this point, and the computing formula of the coherence length of light source is：
Wherein：λ0The centre wavelength of light source is represented, Δ λ represents wavelength bandwidth；Coherence length represents measurement web of the rail deformation
Minimum precision.
From above formula, the present invention is detected using the signal of Low coherence, can reach the displacement measurement of higher precision
(can measure microcosmic rail deformation), therefore be more readily detected for the fine crack of early stage, can ahead of time exclude safety
Hidden danger.
It is represented by via the interference signal converged after reference arm, sample arm reflection：
In formula：PrRepresent the light intensity of the reference light returned from reference arm, referred to as DC terms；P0Represent and returned from sample arm
Output signal light light intensity, r (z) and φ (z) represent the amplitude and phase of the reflectance factor on rail web of the rail surface, Γ respectively
Z () is light source auto-correlation function, k (t) represents the light wave number of time-varying, and z represents reference arm and sample arm displacement difference size.
The interference light intensity (interference light intensity for changing between displacement) of rail surface generation is represented, referred to as
Auto-correlation, PrWithThe noise signal of image formation jamming pattern that can be to finally obtaining is,Be the interference light intensity between reference arm and sample arm, i.e. optics low phase responsibility
Effective interference spectrum signal that system is detected.
Since Fig. 3 represent the optical path difference when reference arm and sample arm change 0 when, and the interference signal figure light intensity of generation becomes
Change form, i.e., to the explanation of low coherence interference.
Interference light intensity signal is periodic light intensity envelope diagram, and due to using two-way interference in the application, two-way is done
The unique difference of signal is related to for phase offset, therefore two-way interference signal be can obtain into approximate 0 value by the method that phase shift is subtracted each other
Straight line, by damage position and deformation extent that the rail web of the rail is drawn by the fluctuation for observing straight line.
A kind of micro- deformation detecting method of rail web of the rail face crack, comprises the following steps：
(1) light of wideband light source is divided into reference light and flashlight by the first coupler；
(2) reference light returns to first by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Circulator outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered first
Signal acquisition circuit and secondary signal Acquisition Circuit；
(3), by being divided into two paths of signals light after the 3rd coupler, two paths of signals light is respectively through corresponding first for flashlight
Rail web of the rail surface is reached after sample arm, the second sample arm, corresponding first sample is returned to after rail web of the rail surface is reflected
Product arm, the second sample arm outgoing, two-way output signal light have respectively entered the first signal acquisition circuit and secondary signal collection electricity
Road；
(4) two-way outgoing reference light is interfered with corresponding output signal light respectively, is carried out respectively by photodetector
Data collecting card is sent to after opto-electronic conversion carries out data acquisition, and finally passing to computer carries out data processing.
Preferably, first signal acquisition circuit and secondary signal Acquisition Circuit include the 4th coupling being sequentially connected
Device, photodetector, data collecting card, the 4th coupler are used to receive two-way outgoing reference light and two-way output signal light.
Preferably, first sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；Institute
State the second circulator in the first sample arm respectively with the 3rd coupler and the first signal acquisition circuit in the 4th coupler phase
Even；The second circulator in second sample arm is coupled with the 4th in the 3rd coupler and secondary signal Acquisition Circuit respectively
Device is connected.
Preferably, the step (4) specifically includes following steps：
4.1 two-way outgoing reference lights are interfered with corresponding output signal light respectively, form two-way interference signal；
4.2 opto-electronic conversion is carried out to two-way interference signal using photodetector after be sent to data collecting card, Ran Hou
It is sent to computer；
4.3 computers carry out denoising to two-way interference signal and (remove DC terms and from after coherent term removal first
Interference), obtain the interference signal after denoising, the first signal acquisition circuit and secondary signal are adopted using phase shift subtractive method then
The two-way interference signal obtained on collector subtracts each other after carrying out phase shift, so as to the signal stablized, when detecting unstable letter
Number when, illustrate that crack damage occurs in the rail web of the rail, thus realize damage accurate detection.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (10)
1. a kind of micro- deformation detecting device of rail web of the rail face crack, it is characterised in that：Including wideband light source, the first coupler,
Reference arm, the first sample arm, the second sample arm, the first signal acquisition circuit and secondary signal Acquisition Circuit；
The reference arm includes piezoelectric ceramics；The light of the wideband light source is by being divided into reference light and signal after the first coupler
Light, the reference light is returned first annular by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Device outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered the first signal
Acquisition Circuit and secondary signal Acquisition Circuit；The flashlight is by being divided into two paths of signals light, two paths of signals after the 3rd coupler
Light reflects respectively through rail web of the rail surface is reached after corresponding first sample arm, the second sample arm by rail web of the rail surface
After return to corresponding first sample arm, the second sample arm outgoing, two-way output signal light has respectively entered the first signal acquisition
Circuit and secondary signal Acquisition Circuit.
2. a kind of micro- deformation detecting device of rail web of the rail face crack according to claim 1, it is characterised in that：Described
One signal acquisition circuit and secondary signal Acquisition Circuit include that the 4th coupler being sequentially connected, photodetector, data are adopted
Truck, the 4th coupler is used to receive reference light and output signal light.
3. a kind of micro- deformation detecting device of rail web of the rail face crack according to claim 2, it is characterised in that：Described
One sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；In first sample arm second
Circulator is connected with the 4th coupler in the 3rd coupler and the first signal acquisition circuit respectively；In second sample arm
Second circulator is connected with the 4th coupler in the 3rd coupler and secondary signal Acquisition Circuit respectively.
4. a kind of micro- deformation detecting device of rail web of the rail face crack according to claim 3, it is characterised in that：Described
One coupler, the second coupler and the 3rd coupler are 1x2 couplers；4th coupler is 2x2 couplers.
5. a kind of micro- deformation detecting device of rail web of the rail face crack according to claim 2, it is characterised in that：The number
The data collecting card of model USB6211 is used according to capture card.
6. a kind of micro- deformation detecting device of rail web of the rail face crack according to claim 2, it is characterised in that：The light
Electric explorer amplifies photodetector for balance.
7. a kind of micro- deformation detecting method of rail web of the rail face crack, it is characterised in that comprise the following steps：
(1) light of wideband light source is divided into reference light and flashlight by the first coupler；
(2) reference light is returned first annular by reaching piezoelectric ceramics after first annular device after piezoelectric ceramics surface is reflected
Device outgoing, emergent light is divided into two-way outgoing reference light by the second coupler, and two-way outgoing reference light has respectively entered the first signal
Acquisition Circuit and secondary signal Acquisition Circuit；
(3), by being divided into two paths of signals light after the 3rd coupler, two paths of signals light is respectively through corresponding first sample for flashlight
Rail web of the rail surface is reached after arm, the second sample arm, returned to after rail web of the rail surface is reflected corresponding first sample arm,
Second sample arm outgoing, two-way output signal light has respectively entered the first signal acquisition circuit and secondary signal Acquisition Circuit；
(4) two-way outgoing reference light is interfered with corresponding output signal light respectively, and photoelectricity is carried out respectively by photodetector
Data collecting card is sent to after conversion carries out data acquisition, and finally passing to computer carries out data processing.
8. a kind of micro- deformation detecting method of rail web of the rail face crack according to claim 7, it is characterised in that：Described
One signal acquisition circuit and secondary signal Acquisition Circuit include that the 4th coupler being sequentially connected, photodetector, data are adopted
Truck, the 4th coupler is used to receive two-way outgoing reference light and two-way output signal light.
9. a kind of micro- deformation detecting method of rail web of the rail face crack according to claim 7, it is characterised in that：Described
One sample arm and the second sample arm include：The second circulator and optical fiber being sequentially connected；In first sample arm second
Circulator is connected with the 4th coupler in the 3rd coupler and the first signal acquisition circuit respectively；In second sample arm
Second circulator is connected with the 4th coupler in the 3rd coupler and secondary signal Acquisition Circuit respectively.
10. a kind of micro- deformation detecting method of rail web of the rail face crack according to claim 7, it is characterised in that：It is described
Step (4) specifically includes following steps：
4.1 two-way outgoing reference lights are interfered with corresponding output signal light respectively, form two-way interference signal；
4.2 opto-electronic conversion is carried out to two-way interference signal using photodetector after be sent to data collecting card, then transmission
To computer；
4.3 computers carry out denoising to two-way interference signal first, DC terms and from after coherent term removal, then using moving
Phase subtractive method carries out phase after phase shift to the two-way interference signal obtained on the first signal acquisition circuit and secondary signal Acquisition Circuit
Subtract, so as to the signal stablized, when unstable signal is detected, illustrate that crack damage occurs in the rail web of the rail, so as to realize
The accurate detection of damage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126822.8A CN106855521B (en) | 2017-03-06 | 2017-03-06 | Rail web surface crack micro-deformation detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710126822.8A CN106855521B (en) | 2017-03-06 | 2017-03-06 | Rail web surface crack micro-deformation detection device and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106855521A true CN106855521A (en) | 2017-06-16 |
| CN106855521B CN106855521B (en) | 2023-07-14 |
Family
ID=59125208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710126822.8A Active CN106855521B (en) | 2017-03-06 | 2017-03-06 | Rail web surface crack micro-deformation detection device and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106855521B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623085A (en) * | 2002-01-24 | 2005-06-01 | 通用医疗公司 | Apparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands |
| CN102057269A (en) * | 2008-11-26 | 2011-05-11 | 齐戈股份有限公司 | Scan error correction in low coherence scanning interferometry |
| US20140160488A1 (en) * | 2012-12-06 | 2014-06-12 | Lehigh University | Apparatus and method for space-division multiplexing optical coherence tomography |
| CN104027073A (en) * | 2014-06-11 | 2014-09-10 | 无锡微奥科技有限公司 | Swept source based common-channel optical coherence tomography system and method |
| CN104854423A (en) * | 2012-12-06 | 2015-08-19 | 周超 | Space-division multiplexing optical coherence tomography apparatus |
| CN105842257A (en) * | 2016-05-09 | 2016-08-10 | 南京理工大学 | Sub-micron scale glass subsurface defect detection device and method |
| CN206671211U (en) * | 2017-03-06 | 2017-11-24 | 南京市计量监督检测院 | A kind of micro- deformation detecting device of rail web of the rail face crack |
-
2017
- 2017-03-06 CN CN201710126822.8A patent/CN106855521B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623085A (en) * | 2002-01-24 | 2005-06-01 | 通用医疗公司 | Apparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands |
| CN102057269A (en) * | 2008-11-26 | 2011-05-11 | 齐戈股份有限公司 | Scan error correction in low coherence scanning interferometry |
| US20140160488A1 (en) * | 2012-12-06 | 2014-06-12 | Lehigh University | Apparatus and method for space-division multiplexing optical coherence tomography |
| CN104854423A (en) * | 2012-12-06 | 2015-08-19 | 周超 | Space-division multiplexing optical coherence tomography apparatus |
| CN104027073A (en) * | 2014-06-11 | 2014-09-10 | 无锡微奥科技有限公司 | Swept source based common-channel optical coherence tomography system and method |
| CN105842257A (en) * | 2016-05-09 | 2016-08-10 | 南京理工大学 | Sub-micron scale glass subsurface defect detection device and method |
| CN206671211U (en) * | 2017-03-06 | 2017-11-24 | 南京市计量监督检测院 | A kind of micro- deformation detecting device of rail web of the rail face crack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106855521B (en) | 2023-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102384799B (en) | Frequency sweeping and data processing method based on Brillouin distributed fiber sensing system correlation detection scheme | |
| KR101473287B1 (en) | Method for optical cable distance measurement by using optical cable tracker and optical cable tracker | |
| CN102095538A (en) | Data demodulation method for polarization maintaining fiber stress sensing | |
| CN109297581A (en) | It is a kind of for compensating the quadratic phase difference measurement method of frequency drift in phase sensitive optical time domain reflectometer | |
| CN103900623A (en) | Optical time domain reflectometer based on double acoustic-optical modulators and common-mode rejection method of optical time domain reflectometer | |
| CN113124994B (en) | Distributed vibration sensing demodulation method based on weak signal-to-noise ratio signal | |
| CN103175837A (en) | Method and device for detecting defect in matrix | |
| CN107515253B (en) | The non-contact quantitative Diagnosis method of girder construction defect based on convolutional neural networks | |
| CN107243511A (en) | Cold-strip Steel Surface roughness online detection instrument and its recurrence smooth adaptive filtering method | |
| CN106595837A (en) | Method and device for processing coherent phase sensitive optical time domain reflectometer | |
| CN102252791A (en) | Differential pair grating demodulating technology for fiber grating sensor stress measurement | |
| JP2007248448A (en) | Internal structure inspecting method and internal structure inspecting device for pearl or precious stones | |
| CN206671211U (en) | A kind of micro- deformation detecting device of rail web of the rail face crack | |
| CN102269911A (en) | Optical demodulation method based on OTDR (Optical Time Domain Reflectometry) technology and optical demodulation device thereof | |
| CN102645168A (en) | System for measuring nanometer micrometric displacement based on full-fiber frequency domain interference | |
| EP2394135B1 (en) | Method and instrument for optical thickness measurement of transparent or semitransparent materials | |
| CN106855521A (en) | A kind of micro- deformation detecting device of rail web of the rail face crack and detection method | |
| CN105928606B (en) | A kind of surface acoustic wave interference of light scanning probe system | |
| CN101666685B (en) | Device and method for extracting low coherence interference center fringe based on two-dimensional image | |
| CN108151871B (en) | Laser interferometry signal extraction system | |
| CN105716521B (en) | Increase the devices and methods therefor of frequency domain low-coherent light interferometry range | |
| CN203224310U (en) | Brillouin optical time domain reflectometer | |
| CN112532337B (en) | Distributed high-precision optical fiber vibration invasion and online monitoring detector | |
| CN114659610B (en) | Homodyne laser interference vibration measurement system based on pupil plane imaging and wavelet transformation | |
| CN205909835U (en) | Measurement system based on optics is relevant interferes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |