CN106525244A - Infrared fusion visual detection system - Google Patents
Infrared fusion visual detection system Download PDFInfo
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- CN106525244A CN106525244A CN201610894127.1A CN201610894127A CN106525244A CN 106525244 A CN106525244 A CN 106525244A CN 201610894127 A CN201610894127 A CN 201610894127A CN 106525244 A CN106525244 A CN 106525244A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0818—Waveguides
- G01J5/0821—Optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
- G01J2005/123—Thermoelectric array
Abstract
The invention discloses a fusion visual detection system based on fiber bundle chromatography and infrared multi-view vision, and the system comprises a fiber bundle chromatography subsystem, an infrared vision subsystem, a Gigabit switcher, and a computer. The Gigabit switcher enables the computer, the fiber bundle chromatography subsystem and the infrared vision subsystem to form a Gigabit-LAN, and all processing terminal RJ45 network interfaces and sensing terminal RJ45 network interfaces and the network interface of the computer are connected with the network interface of the Gigabit switcher through a twisted pair. The computer carries out the control of the fiber bundle chromatography subsystem and the infrared vision subsystem through the Gigabit-LAN, and obtains a processing result of the fiber bundle chromatography subsystem and the infrared image data outputted by the infrared vision subsystem. The beneficial effects of the invention are that the system reconstructs the three-dimensional infrared surface shape of a target through an MV, distinguishes optical thin and thick regions, and obtains the OFBT boundary constraint conditions of an OFBT; the OFBT reconstructs the internal distribution of the optical thin region; the information fusion of two sides overcomes a difficulty of three-dimensional thermal image detection of a complex object.
Description
Technical field
It is the present invention relates to a kind of infrared fusion visual detection system, more particularly to a kind of based on fibre bundle chromatography and infrared many
The fusion visual detection system visually felt.
Background technology
Infrared Thermography Technology is a kind of skill that sightless infra-red radiation is converted into visual picture using Infrared Detectorss
Art.Its early stage of development combines optical mechaical scanning device frequently with infrared unit sensor and obtains Infrared Targets image.Last century 80
In the age, begin one's study in the world and using infrared focal plane array (IRFPA) as the sensor in thermal imaging system, including system
Cold mould and non-refrigeration type IRFPA, and the new detector based on quantum effect such as SQW (QWIP), quantum dot (QDIP) etc..
Third generation IRFPA is made progress at aspects such as imaging area, pixel scale and polychrome imagings in the world, such as U.S. Teledyne
Company provides the mercury cadmium telluride of up to 4096 × 4096 pixels for the Webb Telescope that NASA comes into operation for 2011
IRFPA；In the QWIP of other 1024 × 1024 pixel, long wave IRFPA and four color IRFPA are also succeeded in developing.
Although high-resolution IRFPA improves the resolution of thermal image, conventional infrared thermal imagery method can only obtain target office
Portion's imaging plane thermography, its Limited information for providing.Aero-Space, national defense and military, industrial all departments are to providing mesh at present
The demand of the thermography technique of mark precise information is urgent.As realistic objective mostly includes partial optical thickness surface or is partially in light
Among learning the encirclement of the extraneous obstacle that thick material is constituted, a huge difficult problem is become to the infrared three-dimensional probe of target, is badly in need of target
The measuring method and means of infrared body thermal imagery.
For the problem, the present invention proposes a kind of infrared fusion visible sensation method, and free space fibre-optical beam is chromatographed
(Optical Fiber Bundle Tomography in Free Space, abbreviation OFBT) and multi-vision visual (Multi-view
Vision, abbreviation MV) information fusion.To realize target solid thermal imaging to be measured and the things such as emissivity, absorbance, temperature can be calculated
The distributed in three dimensions of reason parameter.
The content of the invention
It is an object of the invention to provide it is a kind of based on fibre bundle chromatograph and infrared multi-vision visual fusion visual detection system
System.With MV reconstruct target surface optics thickness region black matrix passband radiation intensity distribution, and the target surface that MV is reconstructed not same district
Domain border point coordinates and its corresponding passband blackbody radiation intensity are used as OFBT constraintss, the thin area of high accuracy inverting objective opticses
The corresponding passband blackbody radiation intensity field distribution of domain interior point, so as to realizing target solid thermal imaging to be measured and calculating its sky
Between Three Dimensional Thermal physical quantity distribution.
The technical scheme is that what is be achieved in, based on fibre bundle chromatography and the fusion vision of infrared multi-vision visual
The hardware system of detection is mainly by test platform, fibre bundle chromatography subsystem, infrared vision subsystem, gigabit switch, calculating
Machine is constituted；
Wherein fibre bundle chromatography subsystem includes n OFB (i.e. Optical fiber bundle, fibre bundle), and n is big
In the integer equal to 4, i.e., from first OFB, second OFB, the 3rd OFB until n-th OFB；N tripod, n it is empty
Between wave filter；N band pass filter；N long wave device array and its corresponding analogue amplifier and digital signal processing circuit；
Each OFB is made up of the equally distributed Fibre Optical Sensor unit of p roots, p be the integer more than or equal to 10 square.Per root
Fibre Optical Sensor unit is made up of sensing head, input coupler, sensor fibre, output coupler, long wave unit component.Belong to one
The p long wave unit component that amount in the p root Fibre Optical Sensor units of OFB rearranges a long wave device array in order.Light
The external diameter of the sensing head of fine sensing unit is suitable with the internal diameter of the location hole of spatial filter, and the root optical fiber for belonging to an OFB is passed
A sensing head altogether in sense unit is as one group, in putting into the location hole of spatial filter in order and fixed, in sensing head
The heart is provided with collimating aperture, it is allowed to which light enters sensing head along straight line；The band pass filter of same size is assembled before spatial filter, to entering
The light for entering all Fibre Optical Sensor units of OFB carries out passband optical filtering；Each OFB is fixed on the head of tripod, and its position can
It is convenient to adjust；Sensor fibre is connected with sensing head by input coupler, is connected with long wave unit component by output coupler；
The transducing signal of long wave device array can Jing analogue amplifiers be amplified, then Jing digital signal processing circuits are processed, place
Reason result is outwards transmitted by processing end RJ45 network interfaces；
Infrared vision subsystem includes m infrared vision module, and m is the integer more than or equal to 4；There is m on test platform
Individual translation guide rail and a rotary rail；M infrared vision module is arranged on this m translation guide rail, can be made along translation guide rail
One-dimensional translation and rotate around rotary rail, can fix to after expected space and angle position；Infrared vision module is mainly comprising red
Outer zoom lens and infrared surface battle array, have sensor ends RJ45 network interface, infrared image number on infrared surface battle array controlling and driving circuits
According to can outwards be transmitted by the interface；
Computer, fibre bundle chromatography subsystem are constituted gigabit LAN, institute with infrared vision subsystem by gigabit switch
There is the network interface for processing end RJ45 network interfaces and sensor ends RJ45 network interface and computer all to pass through twisted-pair feeder and thousand
The network interface of million switches is connected.Computer chromatographs subsystem and infrared vision subsystem by the gigabit LAN to fibre bundle
System is controlled, and obtains the result of fibre bundle chromatography subsystem and the infrared image number with the output of infrared vision subsystem
According to so as to realize the gigabit level high speed data transfer between computer, fibre bundle chromatography subsystem and infrared vision subsystem.
Based on the fusion visual detection method of fibre bundle chromatography and infrared multi-vision visual, its step is：
(1) OFB passband radiation calibrations are carried out using blackbody furnace
In each OFB, a Fibre Optical Sensor unit detects an infrared radiation, and sensor fibre adopts infrared optical fiber (hollow
Thermal infrared element can 8～14 μm of thermal infrared radiations of low-loss transmission) Jing output couplers coupling long wave unit component realizes passband
Fibre bundle tomography data acquisition, is converted into analog voltage institute's raying, becomes digital quantity after amplified and A/D conversion.
Each passband corresponding to long wave unit component position that the n altogether of n OFB is multiplied by p root Fibre Optical Sensor units is black
Body radiant intensity It,jAll must be demarcated in advance with the relation of digital quantity, ItFor passband blackbody radiation intensity, j is to be calibrated
The affiliated Fibre Optical Sensor unit of long wave unit component sequence number, the method for adopting for：
Fibre bundle chromatography 8～14 μm of wave-length coverage of detection is selected, and black matrix furnace temperature is adjusted to a certain temperature T, according to Pu Lang
Gram Formula of the blackbody radiation calculates the corresponding passband blackbody radiation intensity I of temperature Tt(radiation curve i.e. under blackbody temperature T 8～
The area of 14 μ ms).Away from blackbody furnace radial chamber distance L, the Fibre Optical Sensor unit to be calibrated of fixed placement one so as to sense
End surface is aligned and perpendicular to radial chamber center, and it is D to measure Fibre Optical Sensor unit output digital quantity.Record above-mentioned one group parameter
Value (L, It,D).Black matrix furnace temperature T is adjusted, another group of parameter value (L, I is recordedt, D), complete the mark of whole blackbody furnace temperature range
After fixed, change L, repeat above step, be capable of achieving under different distance, under different passband blackbody radiation intensities, Fibre Optical Sensor unit
The demarcation of output digital quantity.Because there is individual variation in the long wave unit component of every Fibre Optical Sensor unit, it is therefore desirable to every
Root Fibre Optical Sensor unit is demarcated, and reduces systematic error.The n that amounts to for being finally completed n OFB is multiplied by p root Fibre Optical Sensor units
In the corresponding passband blackbody radiation intensity I of different detection range Lt,jWith the relations I of output digital quantity Dt,j=f1(L, D j), build
Vertical OFB passbands radiation data storehouse.
(2) infrared vision passband radiation calibration is carried out using blackbody furnace
In order to realize fibre bundle chromatography and infrared multi-vision visual information fusion, that is, provide the border of fibre bundle tomographic reconstruction about
Beam condition, it is necessary to solve the transfer problem of passband infrared image (8～14 μm) gray scale and passband blackbody radiation intensity, that is, carry out red
Outer vision passband radiation calibration.
Infrared image composition pixel gray value G of each the infrared surface battle array output in m infrared vision module and passband
Blackbody radiation intensity It,iRelation all must be demarcated in advance, ItFor passband blackbody radiation intensity, i is to be calibrated infrared
The sequence number of vision module, scaling method are similar with step (1)：
Black matrix furnace temperature is adjusted to a certain temperature T, the corresponding passband of temperature T is calculated according to Planck radiation law black
Body radiant intensity It(area of the radiation curve i.e. under blackbody temperature T in 8～14 μ ms).From blackbody furnace radial chamber distance L
Place, the infrared vision module to be calibrated of fixed placement one adjust the infrared zooming lens of infrared vision module so as to accurately focus on
To blackbody furnace radial chamber.Blackbody furnace radiation cavity segment in the infrared image of the infrared surface battle array output for reading the infrared vision module
Average gray value G, records above-mentioned one group parameter value (L, It,G).Adjust black matrix furnace temperature T, record another group of parameter value (L,
It, G), after completing the demarcation of whole blackbody furnace temperature range, change L, repeat above step, be capable of achieving under different distance, it is different
Under passband blackbody radiation intensity, the infrared image of infrared vision module output constitutes the demarcation of pixel gray value G.Due to each
There is individual variation in the infrared surface battle array of infrared vision module, therefore all of infrared surface battle array is demarcated, and can reduce system mistake
Difference.It is finally completed and amounts to m infrared surface battle array under different detection range L in m infrared vision modules, the infrared image of output
(8～14 μm) composition pixel gray values G and passband blackbody radiation intensity It,iRelations It,i=f2(L, G i), set up many mesh
Infrared vision passband radiation data storehouse.
(3) MV and OFBT data acquisitions
Target to be measured is positioned on test platform, at the different direction of warp and weft angles of diameter of Spherical Volume (equal radius of a ball R)
On position, by the installing plate on tripod pan/tilt head, fixed placement n OFB.Meanwhile, m infrared vision module is flat installed in m
On dynamic guide rail 8, make one-dimensional translation along translation guide rail and rotate around rotary rail, until the angle between each translation guide rail it is equal,
And m infrared vision module with a distance from the diameter of Spherical Volume centre of sphere is equal to after R to fix, by the infrared change of all infrared vision modules
The focus of zoom lens is adjusted to R；
The sensing head of each OFB be parallel collimation pore structure, the structure not only ensured line signals collection but also meet real-time
Require.The p sensing head altogether belonged in the p root Fibre Optical Sensor units of an OFB, as one group, puts into space filtering in order
It is in the location hole of device and fixed, sensing head external diameter and location hole equal diameters, the level and vertical dimension between positioning holes center
It is equal, the spatial resolution requirements tested to target to be measured can be met.
Carry out the fusion visual test of target to be measured, gigabit switch by computer, fibre bundle chromatography subsystem with it is infrared
Vision subsystem constitutes gigabit LAN, and computer obtains the relevant to be measured of infrared vision subsystem output by gigabit LAN
M roads infrared picture data under target difference angle, all pixels point gray scale G to every road infrared image compare many mesh infrared
Vision passband radiation data storehouse It,i=f2(R, G, i) are changed, and obtain m width with black matrix passband radiant intensity ItWhat is characterized is infrared
Radiation image.
Meanwhile, digital signal processing circuit is multiplied by each of p root Fibre Optical Sensor units by control electrical switch to all n
Long wave unit component is operated the control of power supply, so as to realize with all long wave unit components of electronic shutter mode instantaneous starting
To gather the space multiple spot passband intensity signal that target to be measured enters each sensing head, while the output of each long wave unit component
Termination peak holding circuit, makes the space multiple spot passband intensity signal for collecting be converted into voltage signal and is latched in peak value guarantor
Hold in circuit.Be amplified through analogue amplifier, then Jing digital signal processing circuits are processed, and mould are carried out to all data
Intend the conversion of signal to digital signal, obtain digital quantity D, then compare OFB passband radiation data storehouse It,j=f1(R, D j), are obtained
The passband radiant intensity initial data I of object space multiple spot to be measuredt。
(4) fused data is processed
To the m width in computer with black matrix passband radiant intensity ItThe infrared radiation images of sign, using Harris operators
The Corner Detection of zones of different is carried out, based on IR pass band is optically thin and the thick region of optics is different image spatial domain and frequency domain character
(such as gray scale, rectangular histogram, texture, amplitude-frequency distribution etc.) carries out region segmentation, and the image matching algorithm based on epipolar-line constraint enters to m width
Row infrared radiation images feature corners Matching, reconstructs the surface topography of target to be measured, and the three-dimensional seat in surface zones of different border
Mark and passband blackbody radiation intensity value.According to the surface zones of different border of the target to be measured of reconstruct, sky is carried out to target to be measured
Between split, that is, be divided into that IR pass band is optically thin and the thick region of optics, for optics thickness region, directly using the target to be measured for reconstructing
Surface topography, that is, complete the work of infrared multi-vision visual；For optically thin region, into following fibre bundle chromatography spaces three
Dimension is rebuild：
The surface zones of different border three-dimensional coordinate and passband blackbody radiation intensity value that are reconstructed by infrared multi-vision visual are made
For constraint, the passband radiant intensity original of the object space multiple spot to be measured for obtaining is processed to digital signal processing circuit in step (2)
Beginning data are divided, and the radiation intensity data in optics thickness region is given up, and the passband radiant intensity using optically thin region is former
Beginning data carry out the Inversion Calculation of fiber optic bundle emission optical chromatography.Calculated by chromatographing, the thin region of objective opticses to be measured is obtained
The passband radiant intensity of inner space each point, so as to optics thickness region in, the target to be measured 1 reconstructed by infrared multi-vision visual
Surface topography and its passband radiant intensity are blended, and complete whole target to be measured (including optically thin region and optics thickness region) empty
Between three-dimensional passband radiant intensity ItThe reconstruction of distribution, based on this can inverting target to be measured (including optically thin region and optics
Thick region) physical quantity such as space three-dimensional temperature, pressure, population density distribution, in computer during its distributed in three dimensions fructufy
Upper display, completes entirely to merge visual detection.
The invention has the beneficial effects as follows, overcome the limitation of single OFBT and MV targets three-dimensional thermal image detection, rebuild using MV
Target three-dimensional Infrared Surface pattern, distinguishes optically thin and optics thickness region, and obtains OFBT edge-restraint conditions；OFBT rebuilds light
Learn thin intra-zone distribution；Both information fusion solve a difficult problem for the three-dimensional thermal image detection of complex object.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention, in figure：1 target to be measured；2 diameter of Spherical Volume；3 tripods；
4 spatial filters；5 location holes；6 first OFB；7 band pass filters；8 translation guide rails；
9 second OFB；10 the 3rd OFB；11 rotary rails；12 infrared surface battle arrays；13 sensor ends RJ45
Network interface；14 infrared zooming lens；15 n-th OFB；16 test platforms；17 collimating apertures；18——
Sensing head；19 sensor fibres；20 input couplers；21 long wave device arrays；22 analogue amplifiers；
23 digital signal processing circuits；24 process end RJ45 network interfaces；25 twisted-pair feeders；26 gigabits are exchanged
Machine；27 computers；28 infrared vision modules；29 output couplers；30 long wave unit components.
Note：OFB is Optical fiber bundle, fibre bundle；RJ45 is 45 data transfers of Registered Jack
Interface；Total numbers of the n for OFB.
Specific embodiment
Chromatographed based on fibre bundle and the hardware system structure for merging visual detection of infrared multi-vision visual is as shown in Figure 1, firmly
Part system is mainly by test platform 16, fibre bundle chromatography subsystem, infrared vision subsystem, gigabit switch 26, computer 27
Composition；
Wherein fibre bundle chromatography subsystem includes n OFB, i.e., from first OFB, 6, second OFB9, the 3rd OFB
10 up to n-th OFB 15, (in the present embodiment, 4) n takes；N tripod 3, n spatial filter 4；N band pass filter
7；N long wave device array 21 and its corresponding analogue amplifier 22 and digital signal processing circuit 23；
Each OFB is made up of the equally distributed Fibre Optical Sensor unit of p roots.Every Fibre Optical Sensor unit is by sensing head 18, defeated
Enter bonder 20, sensor fibre 19, output coupler 29, long wave unit component 30 to constitute.The p roots optical fiber for belonging to an OFB is passed
The p long wave unit component 30 that amount in sense unit rearranges a long wave device array 21 in order.Fibre Optical Sensor unit
Sensing head 18 external diameter it is suitable with the internal diameter of the location hole 5 of spatial filter 4, belong to the p root Fibre Optical Sensor units of an OFB
In amount to p sensing head 18 as one group, in order put into spatial filter 4 location hole 5 in and fixation, in sensing head 18
The heart is provided with collimating aperture 17, it is allowed to which light enters sensing head 18 along straight line；The band pass filter of same size is assembled before spatial filter 4
7 (its passband of the present embodiment is 8～14 μm), carry out passband optical filtering to the light into all Fibre Optical Sensor units of OFB；Each OFB
All it is fixed on the head of tripod 3, its position is conveniently adjusted；Sensor fibre 19 is by input coupler 20 and sensing head 18
Connection, is connected with long wave unit component 30 by output coupler 29；The transducing signal of long wave device array 21 can Jing simulation put
Big device 22 is amplified, then Jing digital signal processing circuits 23 are processed, and result is by processing end RJ45 network interfaces
24 outwards transmit；
Infrared vision subsystem includes m infrared vision module 28；There is m translation guide rail 8 and on test platform 16
Individual rotary rail 11；M infrared vision module 28 is arranged on this m translation guide rail 8, can make one-dimensional translation along translation guide rail 8
And rotate around rotary rail 11, can fix to after expected space and angle position；Infrared vision module 28 mainly includes infrared change
Zoom lens 14 and infrared surface battle array 12, have sensor ends RJ45 network interface 13, infrared figure on 12 controlling and driving circuits of infrared surface battle array
As data can be outwards transmitted by the interface；
Computer 27, fibre bundle chromatography subsystem and infrared vision subsystem are constituted gigabit local by gigabit switch 26
The network interface of net, all process end RJ45 network interfaces 24 and sensor ends RJ45 network interface 13 and computer 27 all passes through
Twisted-pair feeder 25 is connected with the network interface of gigabit switch 26.Computer 27 chromatographs subsystem by the gigabit LAN to fibre bundle
System be controlled with infrared vision subsystem, and obtain fibre bundle chromatography subsystem result and with infrared vision subsystem
The infrared picture data of output, so that realize thousand between computer 27, fibre bundle chromatography subsystem and infrared vision subsystem
Million grades of high speed data transfers.
Based on the fusion visual detection method of fibre bundle chromatography and infrared multi-vision visual, its step is：
(1) OFB passband radiation calibrations are carried out using blackbody furnace
In each OFB, a Fibre Optical Sensor unit detects an infrared radiation, and sensor fibre 19 is (empty using infrared optical fiber
Core thermal infrared element can 8～14 μm of thermal infrared radiations of low-loss transmission) 30 (this of the coupling long wave of Jing output couplers 29 unit component
Embodiment adopts home made O TP538U unit component, and its spectral response range is 8～14 μm) realize passband fibre bundle chromatographic data
Collection, is converted into analog voltage institute's raying, becomes digital quantity after amplified and A/D conversion.
N OFB's amounts to each passband corresponding to 30 position of long wave unit component that n is multiplied by p root Fibre Optical Sensor units
Blackbody radiation intensity It,jAll must be demarcated in advance with the relation of digital quantity, ItFor passband blackbody radiation intensity, j is to wait to mark
Fibre Optical Sensor unit belonging to fixed long wave unit component 30 sequence number (in the present embodiment, n take 4, p take 900, j scope be 1 to
3600) method for, adopting for：
Fibre bundle chromatography 8～14 μm of wave-length coverage of detection is selected, and black matrix furnace temperature is adjusted to a certain temperature T, according to Pu Lang
Gram Formula of the blackbody radiation calculates the corresponding passband blackbody radiation intensity I of temperature Tt(radiation curve i.e. under blackbody temperature T 8～
The area of 14 μ ms).Away from blackbody furnace radial chamber distance L, the Fibre Optical Sensor unit to be calibrated of fixed placement one so as to sense
18 end faces alignment perpendicular to radial chamber center, it is D to measure Fibre Optical Sensor unit output digital quantity.Record above-mentioned one group ginseng
Numerical value (L, It,D).Black matrix furnace temperature T is adjusted, another group of parameter value (L, I is recordedt, D), complete whole blackbody furnace temperature range
After demarcation, change L, repeat above step, be capable of achieving under different distance, under different passband blackbody radiation intensities, Fibre Optical Sensor list
The demarcation of unit's output digital quantity.Because there is individual variation in the long wave unit component 30 of every Fibre Optical Sensor unit, it is therefore desirable to
Every Fibre Optical Sensor unit is demarcated, reduces systematic error.The n that amounts to for being finally completed n OFB is multiplied by p root Fibre Optical Sensors
Unit is in the corresponding passband blackbody radiation intensity I of different detection range Lt,jWith the relations I of output digital quantity Dt,j=f1(L,D,
J), set up OFB passband radiation datas storehouse.
(2) infrared vision passband radiation calibration is carried out using blackbody furnace
In order to realize fibre bundle chromatography and infrared multi-vision visual information fusion, that is, provide the border of fibre bundle tomographic reconstruction about
Beam condition, it is necessary to solve the transfer problem of passband infrared image (8～14 μm) gray scale and passband blackbody radiation intensity, that is, carry out red
Outer vision passband radiation calibration.
(the present embodiment is burnt flat using vanadium oxide uncooled ir for each infrared surface battle array 12 in m infrared vision module 28
Face array, its operating wavelength range are 8～14 μm) infrared image that exports composition pixel gray value G and passband black body radiation
Intensity It,iRelation all must be demarcated in advance, ItFor passband blackbody radiation intensity, i is infrared vision module to be calibrated
28 sequence number (in the present embodiment, it is 1 to 4 that m takes the scope of 4, i), scaling method is similar with step (1)：
Black matrix furnace temperature is adjusted to a certain temperature T, the corresponding passband of temperature T is calculated according to Planck radiation law black
Body radiant intensity It(area of the radiation curve i.e. under blackbody temperature T in 8～14 μ ms).From blackbody furnace radial chamber distance L
Place, the infrared vision module 28 to be calibrated of fixed placement one adjust the infrared zooming lens 14 of infrared vision module 28 so as to accurate
Blackbody furnace radial chamber is focused on really.Blackbody furnace spoke in the infrared image of the output of infrared surface battle array 12 for reading the infrared vision module 28
The average gray value G of cavity segment is penetrated, above-mentioned one group parameter value (L, I is recordedt,G).Black matrix furnace temperature T is adjusted, another group is recorded
Parameter value (L, It, G), after completing the demarcation of whole blackbody furnace temperature range, change L, repeat above step, be capable of achieving it is different away from
Under, under different passband blackbody radiation intensities, the infrared image of the infrared output of vision module 28 constitutes the mark of pixel gray value G
It is fixed.As the infrared surface battle array 12 of each infrared vision module 28 has individual variation, therefore all of infrared surface battle array 12 is carried out
Demarcate, systematic error can be reduced.The m infrared surface battle array 12 that amount to being finally completed in m infrared vision module 28 is detected different
Under L, (8～14 μm) of the infrared image of output constitutes pixel gray values G and passband blackbody radiation intensity It,iRelation
It,i=f2(L, G i), set up the infrared vision passband radiation data storehouse of many mesh.
(3) MV and OFBT data acquisitions
Target to be measured 1 is positioned on test platform 16, in the different direction of warp and weft of diameter of Spherical Volume 2 (equal radius of a ball R)
On the position at angle, by the installing plate on 3 head of tripod, fixed placement n OFB.Meanwhile, m infrared vision module 28 is installed
On m translation guide rail 8, make one-dimensional translation along translation guide rail 8 and rotate around rotary rail 11, until between each translation guide rail 8
Angle it is equal, and m infrared vision modules 28 with a distance from 2 centre of sphere of diameter of Spherical Volume are equal to after R to fix, and infrared regard all
Feel that the focus of the infrared zooming lens 14 of module 28 is adjusted to R；
The sensing head 18 of each OFB is parallel collimation pore structure, and the structure had not only ensured line signals collection but also satisfaction is real-time
Property require.The p sensing head 18 altogether belonged in the p root Fibre Optical Sensor units of an OFB, as one group, puts into space in order
In the location hole 5 of wave filter 4 and fixed, 18 external diameter of sensing head and 5 equal diameters of location hole (being 1mm in the present embodiment) are fixed
Level (distance is 2mm in the present embodiment) equal with vertical dimension between 5 center of hole of position, can meet and target to be measured 1 is entered
The spatial resolution requirements of row test.
Carry out the fusion visual test of target to be measured 1, gigabit switch 26 by computer 27, fibre bundle chromatography subsystem with
Infrared vision subsystem constitutes gigabit LAN, and computer 27 obtains having for infrared vision subsystem output by gigabit LAN
The m roads infrared picture data under 1 different angles of target to be measured is closed, all pixels point gray scale G to every road infrared image is compareed many
The infrared vision passband radiation data storehouse I of mesht,i=f2(R, G, i) are changed, and obtain m width with black matrix passband radiant intensity ItCharacterize
Infrared radiation images.
Meanwhile, digital signal processing circuit 23 is multiplied by the every of p root Fibre Optical Sensor units by controlling electrical switch to all n
Individual long wave unit component 30 is operated the control of power supply, so as to realize with all long wave units of electronic shutter mode instantaneous starting
Device 30 with gather target to be measured 1 into each sensing head 18 space multiple spot passband intensity signal, while each long wave unit
The output termination peak holding circuit of device 30, makes the space multiple spot passband intensity signal for collecting be converted into voltage signal
It is latched in peak holding circuit.It is amplified through analogue amplifier 22, then Jing digital signal processing circuits 23 is processed,
The conversion of signal to digital signal is simulated to all data, digital quantity D is obtained, then is compareed OFB passband radiation data storehouse It,j
=f1(R, D j), obtain the passband radiant intensity initial data I of 1 space multiple spot of target to be measuredt。
(4) fused data is processed
To the m width in computer 27 with black matrix passband radiant intensity ItThe infrared radiation images of sign, are calculated using Harris
Son carries out the Corner Detection of zones of different, special based on the image spatial domain and frequency domain that IR pass band is optically thin and the thick region of optics is different
Levying (such as gray scale, rectangular histogram, texture, amplitude-frequency distribution etc.) carries out region segmentation, and the image matching algorithm based on epipolar-line constraint is to m width
Infrared radiation images feature corners Matching is carried out, the surface topography of target to be measured 1 is reconstructed, and surface zones of different border is three-dimensional
Coordinate and passband blackbody radiation intensity value.According to the surface zones of different border of the target to be measured 1 of reconstruct, target to be measured 1 is entered
Row space is split, that is, be divided into that IR pass band is optically thin and the thick region of optics, for optics thickness region, directly to be measured using what is reconstructed
The surface topography of target 1, that is, complete the work of infrared multi-vision visual；For optically thin region, chromatograph into following fibre bundles
Space three-dimensional is rebuild：
The surface zones of different border three-dimensional coordinate and passband blackbody radiation intensity value that are reconstructed by infrared multi-vision visual are made
For constraint, the passband radiant intensity of the 1 space multiple spot of target to be measured for obtaining is processed to digital signal processing circuit 23 in step (2)
Initial data is divided, and the radiation intensity data in optics thickness region is given up, using the passband radiant intensity in optically thin region
Initial data carries out the Inversion Calculation of fiber optic bundle emission optical chromatography.Calculated by chromatographing, 1 optically thin area of target to be measured is obtained
The passband radiant intensity of domain inner space each point, so as to optics thickness region in, the target to be measured 1 reconstructed by infrared multi-vision visual
Surface topography and its passband radiant intensity blend, complete whole target to be measured 1 (including optically thin region and optics thickness area
Domain) space three-dimensional passband radiant intensity ItThe reconstruction of distribution, based on this can inverting target to be measured 1 (including optically thin region
And optics thickness region) physical quantity such as space three-dimensional temperature, pressure, population density distribution, during its distributed in three dimensions fructufy
Show on computer 27, complete entirely to merge visual detection.
Claims (1)
1. it is a kind of chromatographed based on fibre bundle and infrared multi-vision visual fusion visual detection system, the system includes test platform
(16), fibre bundle chromatography subsystem, infrared vision subsystem, gigabit switch (26) and computer (27), it is characterised in that：
Described fibre bundle chromatography subsystem includes n OFB, and n is the integer more than or equal to 4, i.e., from first OFB (6), the
Two OFB (9), the 3rd OFB (10), until n-th OFB (15)；N tripod (3), n spatial filter (4)；N
Band pass filter (7)；N long wave device array (21) and its corresponding analogue amplifier (22) and digital signal processing circuit
(23)；
Each OFB is made up of the equally distributed Fibre Optical Sensor unit of p roots, p be the integer more than or equal to 10 square, every optical fiber
Sensing unit is by sensing head (18), input coupler (20), sensor fibre (19), output coupler (29), long wave unit component
(30) constitute.Belong to and amount to p long wave unit component (30) arrangement group in order in the p root Fibre Optical Sensor units of an OFB
Into a long wave device array (21)；The external diameter of the sensing head (18) of Fibre Optical Sensor unit and the location hole of spatial filter (4)
(5) internal diameter quite, belongs to the p sensing head (18) altogether in the p root Fibre Optical Sensor units of an OFB as one group, by suitable
During sequence puts into the location hole (5) of spatial filter (4) and fixed, sensing head (18) center is provided with collimating aperture (17), it is allowed to light
Sensing head (18) is entered along straight line；Band pass filter (7) of the assembling with size before spatial filter (4), to into all light of OFB
The light of fine sensing unit carries out passband optical filtering；Each OFB is fixed on the head of tripod (3), and its position is conveniently adjusted；
Sensor fibre (19) is connected with sensing head (18) by input coupler (20), by output coupler (29) and long wave unit device
Part (30) is connected；The transducing signal of long wave device array (21) can Jing analogue amplifiers (22) be amplified, then Jing digital signals
Process circuit (23) is processed, and result is outwards transmitted by processing end RJ45 network interfaces (24)；
Described infrared vision subsystem includes m infrared vision module (28), and m is the integer more than or equal to 4；Test platform
(16) there are m translation guide rail (8) and a rotary rail (11) on；M infrared vision module (28) are led installed in this m translation
On rail (8), one-dimensional translation can be made along translation guide rail (8) and be rotated around rotary rail (11), to after expected space and angle position
Can fix；Infrared vision module (28) mainly include infrared zooming lens (14) and infrared surface battle array (12), infrared surface battle array (12) control
There is sensor ends RJ45 network interface (13) on system and drive circuit, infrared picture data can be outwards transmitted by the interface；
Computer (27), fibre bundle chromatography subsystem are constituted gigabit with infrared vision subsystem by described gigabit switch (26)
The network of LAN, all process end RJ45 network interfaces (24) and sensor ends RJ45 network interface (13) and computer (27)
Interface is all passed through twisted-pair feeder (25) and is connected with the network interface of gigabit switch (26).Computer (27) passes through the gigabit LAN
To fibre bundle chromatography subsystem be controlled with infrared vision subsystem, and obtain fibre bundle chromatography subsystem result and
With infrared vision subsystem output infrared picture data, so as to realize computer (27), fibre bundle chromatography subsystem with it is infrared
Gigabit level high speed data transfer between vision subsystem.
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Effective date of registration: 20200629 Address after: 201800 First Floor and First Floor of the Underground of 2398 Luyi Road Comprehensive Laboratory Building, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: SHANGHAI JIWU PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 200083 No. 500, Yutian Road, Shanghai, Hongkou District Patentee before: Shanghai Institute of Technical Physics, Chinese Academy of Sciences |