CN106405671B - A kind of infrared fusion visual detection method - Google Patents
A kind of infrared fusion visual detection method Download PDFInfo
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- CN106405671B CN106405671B CN201610893815.6A CN201610893815A CN106405671B CN 106405671 B CN106405671 B CN 106405671B CN 201610893815 A CN201610893815 A CN 201610893815A CN 106405671 B CN106405671 B CN 106405671B
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Abstract
The invention discloses a kind of fusion visual detection methods based on fiber optic bundle chromatography and infrared multi-vision visual, it includes OFB passbands radiation calibration, infrared vision passband radiation calibration, the acquisition of MV and OFBT data and fused data and handles four steps.The invention has the advantages that overcoming the limitation of single OFBT and MV targets three-dimensional thermal image detection, target three-dimensional Infrared Surface pattern is rebuild using MV, distinguishes optically thin and optics thickness region, and obtain OFBT edge-restraint conditions；OFBT, which is rebuild inside optically thin region, to be distributed；The information fusion of the two solves the problems, such as the three-dimensional thermal image detection of complex object.
Description
Technical field
The present invention relates to a kind of infrared fusion visual detection system and method, more particularly to it is a kind of based on fiber optic bundle chromatography and
The fusion visual detection method of infrared multi-vision visual.
Background technology
Infrared Thermography Technology is that sightless infra-red radiation is converted into a kind of skill of visual picture using infrared detector
Art.Its early stage of development obtains Infrared Targets image frequently with infrared unit sensor combination optical mechaical scanning device.Last century 80
Age begins one's study and using infrared focal plane array (IRFPA) as the sensor in thermal imaging system, in the world including system
New detector based on quantum effect such as cold mould and non-refrigeration type IRFPA and Quantum Well (QWIP), quantum dot (QDIP) etc..
Third generation IRFPA makes progress in imaging area, pixel scale and polychrome imaging etc. in the world, such as U.S. Teledyne
Company provides the mercury cadmium telluride of up to 4096 × 4096 pixels for the NASA Webb Telescopes to come into operation in 2011
IRFPA；Long wave IRFPA and four color IRFPA have also been succeeded in developing in the QWIP of other 1024 × 1024 pixel.
Although high-resolution IRFPA improves the resolution ratio of thermal image, conventional infrared thermal imagery method can only obtain target office
Portion's imaging plane thermography, the Limited information provided.Aerospace, national defense and military, industrial each department are to that can provide mesh at present
Mark precise information thermography technique demand urgent.Since realistic objective mostly includes partial optical thickness surface or is partially in light
Among learning the encirclement of extraneous obstacle that thick material is formed, huge 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, 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 that the thermal imaging of object to be measured solid can simultaneously calculate the objects such as emissivity, transmissivity, temperature
Manage the distributed in three dimensions of parameter.
Invention content
The purpose of the present invention is to provide a kind of fusion visual detection sides based on fiber optic bundle chromatography and infrared multi-vision visual
Method.With MV reconstruct target surface optics thickness region black matrix passband radiation intensity distribution, and by the target surface of MV reconstruct not same district
Domain boundary point coordinates and its corresponding passband blackbody radiation intensity are as OFBT constraintss, the thin area of high-precision inverting objective optics
Interior point corresponding passband blackbody radiation intensity field distribution in domain so as to fulfill the thermal imaging of object to be measured solid and calculates its sky
Between Three Dimensional Thermal physical quantity be distributed.
The technical scheme is that be achieved in, the fusion vision based on fiber optic bundle chromatography and infrared multi-vision visual
The hardware system of detection is mainly by test platform, fiber optic bundle chromatography subsystem, infrared vision subsystem, gigabit switch, calculating
Machine forms；
Wherein fiber optic bundle chromatography subsystem include n OFB (i.e. Optical fiber bundle, fiber optic bundle), i.e., from
First OFB, second OFB, third OFB are until n-th of OFB；N tripod, n spatial filter；N passband filter
Mating plate；N long wave device array and its corresponding analogue amplifier and digital signal processing circuit；
Each OFB is made of the equally distributed Fibre Optical Sensor unit of p roots.Every Fibre Optical Sensor unit is by sensing head, input
Coupler, sensor fibre, output coupler, long wave unit component composition.Belong in the p root Fibre Optical Sensor units of an OFB
P long wave unit component rearranges a long wave device array in order altogether.The outer diameter of the sensing head of Fibre Optical Sensor unit
Suitable with the internal diameter of the location hole of spatial filter, the sensing head that amounts to belonged in the root Fibre Optical Sensor unit of an OFB is made
It is one group, puts into the location hole of spatial filter and fix in order, sensing head center is provided with collimating aperture, allows light along directly
Line enters sensing head；The band pass filter with size is assembled before spatial filter, to entering the light of all Fibre Optical Sensor units of OFB
Carry out passband optical filtering；Each OFB is fixed on the holder of tripod, and position is conveniently adjusted；Sensor fibre passes through input
Coupler is connect with sensing head, is connected by output coupler with long wave unit component；The transducing signal of long wave device array can
It is amplified through analogue amplifier, then is handled through digital signal processing circuit, handling result passes through processing end RJ45 networks
Interface transmits outward；
Infrared vision subsystem includes m infrared vision modules；There are m translation guide rail and a rotation on test platform
Guide rail；M infrared vision modules are mounted on this m translation guide rail, can make one-dimensional translation and around rotary rail along translation guide rail
Rotation can be fixed to after being expected space and angle position；Infrared vision module mainly includes infrared zooming lens and infrared surface battle array,
There are sensor ends RJ45 network interfaces on infrared surface battle array controlling and driving circuits, infrared picture data can be by the interface to unofficial biography
It send；
Computer, fiber optic bundle chromatography subsystem are formed gigabit LAN, institute by gigabit switch with infrared vision subsystem
There are processing end RJ45 network interfaces and the network interface of sensor ends RJ45 network interfaces and computer all by twisted-pair feeder and thousand
The network interface of million interchangers is connected.Computer chromatographs subsystem and infrared vision subsystem by the gigabit LAN to fiber optic bundle
System is controlled, and obtains the handling result of fiber optic bundle chromatography subsystem and the infrared image number exported with infrared vision subsystem
According to so as to fulfill the gigabit grade high speed data transfer between computer, fiber optic bundle chromatography subsystem and infrared vision subsystem.
It is based on fiber optic bundle chromatography and the fusion visual detection method of infrared multi-vision visual its step：
(1) OFB passband radiation calibrations are carried out using blackbody furnace
A Fibre Optical Sensor unit detects an infrared radiation in each OFB, and sensor fibre uses infrared optical fiber (hollow
Thermal infrared element can 8~14 μm of thermal infrared radiations of low-loss transmission) realize passband through output coupler coupling long wave unit component
Institute's raying is converted into analog voltage by fiber optic bundle tomography data acquisition, becomes digital quantity after amplification and A/D transformation.
The passband that n is multiplied by corresponding to each long wave unit component position of p root Fibre Optical Sensor units altogether of n OFB is black
Body radiation intensity It,jMust all be demarcated in advance with the relationship of digital quantity, n is integer more than or equal to 4, p be more than or equal to
Square of 10 integer, ItFor passband blackbody radiation intensity, j is the affiliated Fibre Optical Sensor unit of long wave unit component to be calibrated
Serial number, the method used for：
Fiber optic bundle chromatography 8~14 μm of wave-length coverage of detection is selected, 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(i.e. radiation curve under blackbody temperature T 8~
The area of 14 μ ms).At blackbody furnace radial chamber distance L, the Fibre Optical Sensor unit to be calibrated of fixed placement one makes its sensing
End surface is aligned and perpendicular to radial chamber center, it is D to measure Fibre Optical Sensor unit output digital quantity.Record one group of above-mentioned parameter
It is worth (L, It,D).Black matrix furnace temperature T is adjusted, records another group of parameter value (L, It, D), complete the mark of entire blackbody furnace temperature range
After fixed, change L, repeat above step, it can be achieved that under different distance, under different passband blackbody radiation intensities, Fibre Optical Sensor unit
Export the calibration of digital quantity.Due to the long wave unit component of every Fibre Optical Sensor unit, there are individual differences, 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,jRelations I with exporting digital quantity Dt,j=f1(L, D, j), builds
Vertical OFB passband radiation datas library.
(2) infrared vision passband radiation calibration is carried out using blackbody furnace
In order to realize fiber optic bundle chromatography and the fusion of infrared multi-vision visual information, that is, provide the boundary of fiber optic 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 infrared image composition pixel gray value G and passband of each infrared surface battle array output in m infrared vision modules
Blackbody radiation intensity It,iRelationship must all be demarcated in advance, m is integer more than or equal to 4, ItIt is strong for passband black body radiation
Degree, i are the serial number of infrared vision module to be calibrated, and scaling method is similar with step (1)：
Black matrix furnace temperature is adjusted to a certain temperature T, it is black that the corresponding passbands of temperature T are calculated according to Planck radiation law
Body radiation intensity It(i.e. radiation curve under blackbody temperature T is in the area of 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, it are made accurately to focus on
To blackbody furnace radial chamber.Read blackbody furnace radiation cavity segment in the infrared image of the infrared surface battle array output of the infrared vision module
Average gray value G records above-mentioned one group of parameter value (L, It,G).Adjust black matrix furnace temperature T, record another group of parameter value (L,
It, G), after the calibration for completing entire blackbody furnace temperature range, change L, repeat above step, it can be achieved that under different distance, it is different
Under passband blackbody radiation intensity, the calibration of the infrared image composition pixel gray value G of infrared vision module output.Due to each
The infrared surface battle array of infrared vision module is demarcated there are individual difference, therefore to all infrared surface battle arrays, can reduce system mistake
Difference.It is finally completed in m infrared vision modules and amounts to m infrared surface battle array under different detection range L, the infrared image of output
(8~14 μm) composition pixel gray value G and passband blackbody radiation intensity It,iRelations It,i=f2(L, G, i) establishes more mesh
Infrared vision passband radiation data library.
(3) MV and OFBT data acquire
Object 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, n OFB of fixed placement.Meanwhile m infrared vision modules are mounted on m and put down
On dynamic guide rail 8, make one-dimensional translation along translation guide rail and rotate around rotary rail, until the angle between each guide rail that is translatable is equal,
And m infrared vision modules R is equal to a distance from the diameter of Spherical Volume centre of sphere after can 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 is parallel collimation pore structure, which had not only ensured line signals acquisition but also met real-time
It is required that.Belong in the p root Fibre Optical Sensor units of an OFB and amount to p sensing head as one group, put into space filtering in order
In the location hole of device and fixed, sensing head outer diameter is equal with positioning bore dia, level and vertical range between positioning holes center
It is equal, the spatial resolution requirements tested object to be measured can be met.
Carry out object to be measured fusion visual test, gigabit switch by computer, fiber optic bundle chromatography subsystem with it is infrared
Vision subsystem forms gigabit LAN, and computer obtains the related to be measured of infrared vision subsystem output by gigabit LAN
To all pixels point gray scale G of every road infrared image, it is infrared to compare more mesh for m roads infrared picture data under target different angle
Vision passband radiation data library It,i=f2(R, G, i) is converted, and obtains m width with black matrix passband radiation intensity ItWhat is characterized is infrared
Radiation image.
Meanwhile digital signal processing circuit is by controlling electronic switch that all n are multiplied by with each of p root Fibre Optical Sensor units
Long wave unit component carries out the control of working power, so as to fulfill all long wave unit components of instantaneous starting in a manner of electronic shutter
To acquire the space multiple spot passband intensity signal that object to be measured enters each sensing head, while the output of each long wave unit component
Peak holding circuit is terminated, collected space multiple spot passband intensity signal is made to be converted into voltage signal and is latched in peak value guarantor
It holds in circuit.It is amplified by analogue amplifier, then is handled through digital signal processing circuit, mould is carried out to all data
Intend signal to the transformation of digital signal, obtain digital quantity D, then compare OFB passband radiation datas library It,j=f1(R, D, j) is obtained
The passband radiation intensity initial data I of object to be measured space multiple spott。
(4) fused data is handled
To the m width in computer with black matrix passband radiation intensity ItThe infrared radiation images of characterization, using Harris operators
The Corner Detection of different zones is carried out, based on the image spatial domain that IR pass band is optically thin and the thick region of optics is different and frequency domain character
(such as gray scale, histogram, texture, amplitude-frequency distribution) carry out region segmentation, based on the image matching algorithm of epipolar-line constraint to m width into
Row infrared radiation images feature corners Matching, the surface topography and surface different zones boundary three-dimensional for reconstructing object to be measured are sat
Mark and passband blackbody radiation intensity value.According to the surface different zones boundary of the object to be measured of reconstruct, object to be measured is carried out empty
Between divide, 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 object to be measured of reconstruct
Surface topography, that is, complete the work of infrared multi-vision visual；For optically thin region, space three is chromatographed into following fiber optic bundles
Dimension is rebuild：
The surface different zones boundary three-dimensional coordinate and passband blackbody radiation intensity value reconstructed by infrared multi-vision visual is made
It is former to the passband radiation intensity of object to be measured space multiple spot that digital signal processing circuit processing obtains in step (2) for constraint
Beginning data are divided, and the radiation intensity data in optics thickness region is given up, former using the passband radiation intensity in optically thin region
Beginning data carry out the Inversion Calculation of fiber optic bundle emission optical chromatography.It is calculated by chromatographing, can obtain the optically thin region of object to be measured
The passband radiation intensity of inner space each point, so as to the object to be measured 1 in optics thickness region, reconstructed by infrared multi-vision visual
Surface topography and its passband radiation intensity blend, and complete entire object to be measured (including optically thin region and optics thickness region) sky
Between three-dimensional passband radiation intensity ItThe reconstruction of distribution, based on this can inverting object to be measured (including optically thin region and optics
Thick region) physical quantitys such as space three-dimensional temperature, pressure, population density distribution, three-dimensional distribution results are in real time in computer
Entire fusion visual detection is completed in upper display.
The invention has the advantages that overcoming 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
It learns and is distributed inside thin region；The information fusion of the two solves the problems, such as the three-dimensional thermal image detection of complex object.
Description of the drawings
Fig. 1 is the principle of the present invention figure, in figure：1 --- object to be measured；2 --- diameter of Spherical Volume；3 --- tripod；
4 --- spatial filter；5 --- location hole；6 --- first OFB；7 --- band pass filter；8 --- translation guide rail；
9 --- second OFB；10 --- third OFB；11 --- rotary rail；12 --- infrared surface battle array；13 --- sensor ends RJ45
Network interface；14 --- infrared zooming lens；15 --- n-th of OFB；16 --- test platform；17 --- collimating aperture；18——
Sensing head；19 --- sensor fibre；20 --- input coupler；21 --- long wave device array；22 --- analogue amplifier；
23 --- digital signal processing circuit；24 --- processing end RJ45 network interfaces；25 --- twisted-pair feeder；26 --- gigabit exchanges
Machine；27 --- computer；28 --- infrared vision module；29 --- output coupler；30 --- long wave unit component.
Note：OFB, that is, Optical fiber bundle, fiber optic bundle；45 data transmissions of RJ45, that is, Registered Jack
Interface；N is the total number of OFB.
Specific embodiment
The hardware system structure of fusion visual detection based on fiber optic bundle chromatography and infrared multi-vision visual is as shown in Figure 1, firmly
Part system is mainly by test platform 16, fiber optic bundle chromatography subsystem, infrared vision subsystem, gigabit switch 26, computer 27
Composition；
Wherein fiber optic bundle chromatography subsystem includes n OFB, i.e., from first OFB, 6, second OFB 9, third
Up to n-th of OFB 15, (in the present embodiment, 4) n takes OFB 10；N tripod 3, n spatial filter 4；N passband filter
Mating plate 7；N long wave device array 21 and its corresponding analogue amplifier 22 and digital signal processing circuit 23；
Each OFB is made of the equally distributed Fibre Optical Sensor unit of p roots.Every Fibre Optical Sensor unit is by sensing head 18, defeated
Enter coupler 20, sensor fibre 19, output coupler 29, long wave unit component 30 to form.The p roots optical fiber for belonging to an OFB passes
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 outer 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 the p sensing head 18 of amounting to be used as one group, put into order in the location hole 5 of spatial filter 4 and fixation, in sensing head 18
The heart is provided with collimating aperture 17, and light is allowed to enter sensing head 18 along straight line；Assembling is the same as the band pass filter of size before spatial filter 4
7 (its passband of the present embodiment is 8~14 μm), passband optical filtering is carried out to the light for entering all Fibre Optical Sensor units of OFB；Each OFB
It is all fixed on the holder of tripod 3, position is conveniently adjusted；Sensor fibre 19 passes through input coupler 20 and sensing head 18
Connection, is connected by output coupler 29 with long wave unit component 30；The transducing signal of long wave device array 21 can be put through simulation
Big device 22 is amplified, then handled through digital signal processing circuit 23, and handling result passes through processing end RJ45 network interfaces
24 transmission outward；
Infrared vision subsystem includes m infrared vision modules 28；There is m translation guide rail 8 and one on test platform 16
A rotary rail 11；M infrared vision modules 28 are mounted on this m translation guide rail 8, can make one-dimensional translation along translation guide rail 8
And rotated around rotary rail 11, it can be fixed to after being 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 interfaces 13, infrared figure on 12 controlling and driving circuits of infrared surface battle array
As data can outward be transmitted by the interface；
Computer 27, fiber optic bundle chromatography subsystem are formed gigabit local by gigabit switch 26 with infrared vision subsystem
Net, all processing end RJ45 network interfaces 24 and the network interface of sensor ends RJ45 network interfaces 13 and computer 27 all pass through
Twisted-pair feeder 25 is connected with the network interface of gigabit switch 26.Computer 27 chromatographs subsystem by the gigabit LAN to fiber optic bundle
System controlled with infrared vision subsystem, and obtain fiber optic bundle chromatograph subsystem handling result and with infrared vision subsystem
The infrared picture data of output, so as to fulfill thousand between computer 27, fiber optic bundle chromatography subsystem and infrared vision subsystem
Million grades of high speed data transfers.
It is based on fiber optic bundle chromatography and the fusion visual detection method of infrared multi-vision visual its step：
(1) OFB passband radiation calibrations are carried out using blackbody furnace
A Fibre Optical Sensor unit detects an infrared radiation in each OFB, 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) couple (this of long wave unit component 30 through output coupler 29
Embodiment uses home made O TP538U unit components, and spectral response range is 8~14 μm) realize passband fiber optic bundle chromatographic data
Institute's raying, is converted into analog voltage by acquisition, becomes digital quantity after amplification and A/D transformation.
The n altogether of n OFB is multiplied by the passband corresponding to each 30 position of long wave unit component of p root Fibre Optical Sensor units
Blackbody radiation intensity It,jIt must all be demarcated in advance with the relationship of digital quantity, ItFor passband blackbody radiation intensity, j is waits to mark
Fibre Optical Sensor unit belonging to fixed long wave unit component 30 serial number (in the present embodiment, n take 4, p take ranging from the 1 of 900, j to
3600) method, used for：
Fiber optic bundle chromatography 8~14 μm of wave-length coverage of detection is selected, 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(i.e. radiation curve under blackbody temperature T 8~
The area of 14 μ ms).At blackbody furnace radial chamber distance L, the Fibre Optical Sensor unit to be calibrated of fixed placement one makes its sensing
First 18 end face is aligned and perpendicular to radial chamber center, it is D to measure Fibre Optical Sensor unit output digital quantity.Record one group of above-mentioned ginseng
Numerical value (L, It,D).Black matrix furnace temperature T is adjusted, records another group of parameter value (L, It, D), complete entire blackbody furnace temperature range
After calibration, change L, repeat above step, it can be achieved that under different distance, under different passband blackbody radiation intensities, Fibre Optical Sensor list
The calibration of member output digital quantity.Due to the long wave unit component 30 of every Fibre Optical Sensor unit, there are individual differences, 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,jRelations I with exporting digital quantity Dt,j=f1(L,D,
J), OFB passband radiation datas library is established.
(2) infrared vision passband radiation calibration is carried out using blackbody furnace
In order to realize fiber optic bundle chromatography and the fusion of infrared multi-vision visual information, that is, provide the boundary of fiber optic 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.
Each infrared surface battle array 12 in m infrared vision modules 28 (using vanadium oxide uncooled ir coke put down by the present embodiment
Face array, operating wavelength range are 8~14 μm) infrared image of output forms pixel gray value G and passband black body radiation
Intensity It,iRelationship must all be demarcated in advance, ItFor passband blackbody radiation intensity, i is infrared vision module to be calibrated
28 serial number (in the present embodiment, m takes ranging from the 1 to 4 of 4, i), scaling method is similar with step (1)：
Black matrix furnace temperature is adjusted to a certain temperature T, it is black that the corresponding passbands of temperature T are calculated according to Planck radiation law
Body radiation intensity It(i.e. radiation curve under blackbody temperature T is in the area of 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, make its standard
Really focus on blackbody furnace radial chamber.Read blackbody furnace spoke in the infrared image of the output of infrared surface battle array 12 of the infrared vision module 28
The average gray value G of cavity segment is penetrated, records above-mentioned one group of parameter value (L, It,G).Black matrix furnace temperature T is adjusted, records another group
Parameter value (L, It, G), after the calibration for completing entire blackbody furnace temperature range, change L, repeat above step, it can be achieved that it is different away from
From under, under different passband blackbody radiation intensities, the infrared image that infrared vision module 28 exports forms the mark of pixel gray value G
It is fixed.Due to the infrared surface battle array 12 of each infrared vision module 28, there are individual differences, and all infrared surface battle arrays 12 are carried out
Calibration, can reduce systematic error.It is finally completed in m infrared vision modules 28 and amounts to m infrared surface battle array 12 in different detections
Under distance L, (8~14 μm) composition pixel gray value G and passband blackbody radiation intensity I of infrared image of outputt,iRelationship
It,i=f2(L, G, i) establishes the infrared vision passband radiation data library of more mesh.
(3) MV and OFBT data acquire
Object 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 holder of tripod, n OFB of fixed placement.Meanwhile m infrared vision modules 28 are installed
On m translation guide rail 8, make one-dimensional translation along translation guide rail 8 and rotated around rotary rail 11, until between each translation guide rail 8
Angle it is equal, and m infrared vision modules 28 R is equal to a distance from 2 centre of sphere of diameter of Spherical Volume after can fix, infrared regarded 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, which had not only ensured line signals acquisition but also met real-time
Property requirement.The p sensing head 18 that amount to belonged in the p root Fibre Optical Sensor units of an OFB is used as one group, puts into space in order
In the location hole 5 of wave filter 4 and fixed, 18 outer diameter of sensing head is equal with 5 diameter of location hole (being 1mm in the present embodiment), fixed
Level between 5 center of hole of position is equal with vertical range (in the present embodiment the distance be 2mm), can meet to object to be measured 1 into
The spatial resolution requirements of row test.
Carry out object to be measured 1 fusion visual test, gigabit switch 26 by computer 27, fiber optic bundle chromatography subsystem with
Infrared vision subsystem forms gigabit LAN, and computer 27 obtains having for infrared vision subsystem output by gigabit LAN
The m roads infrared picture data under 1 different angle of object to be measured is closed, to all pixels point gray scale G of every road infrared image, control is more
The infrared vision passband radiation data library I of mesht,i=f2(R, G, i) is converted, and obtains m width with black matrix passband radiation intensity ItCharacterization
Infrared radiation images.
Meanwhile digital signal processing circuit 23 is by controlling electronic switch that all n are multiplied by with the every of p root Fibre Optical Sensor units
A long wave unit component 30 carries out the control of working power, so as to fulfill all long wave units of instantaneous starting in a manner of electronic shutter
Device 30 is to acquire the space multiple spot passband intensity signal that object to be measured 1 enters each sensing head 18, while each long wave unit
The output termination peak holding circuit of device 30, makes collected space multiple spot passband intensity signal be converted into voltage signal
It is latched in peak holding circuit.It is amplified by analogue amplifier 22, then is handled through digital signal processing circuit 23,
All data are carried out with analog signal to the transformation of digital signal, obtains digital quantity D, then compare OFB passband radiation datas library It,j
=f1(R, D, j) obtains the passband radiation intensity initial data I of 1 space multiple spot of object to be measuredt。
(4) fused data is handled
To the m width in computer 27 with black matrix passband radiation intensity ItThe infrared radiation images of characterization, are calculated using Harris
Son carries out the Corner Detection of different zones, special based on the image spatial domain that IR pass band is optically thin and the thick region of optics is different and frequency domain
Sign (such as gray scale, histogram, texture, amplitude-frequency distribution) carries out region segmentation, based on the image matching algorithm of epipolar-line constraint to m width
Infrared radiation images feature corners Matching is carried out, surface topography and the surface different zones boundary for reconstructing object to be measured 1 are three-dimensional
Coordinate and passband blackbody radiation intensity value.According to the surface different zones boundary of the object to be measured 1 of reconstruct, to object to be measured 1 into
Row space is divided, that is, is divided into that IR pass band is optically thin and the thick region of optics, to be measured directly using what is reconstructed for optics thickness region
The surface topography of target 1 completes the work of infrared multi-vision visual；For optically thin region, chromatographed into following fiber optic bundles
Space three-dimensional is rebuild：
The surface different zones boundary three-dimensional coordinate and passband blackbody radiation intensity value reconstructed by infrared multi-vision visual is made
For constraint, the passband radiation intensity of the 1 space multiple spot of object to be measured obtained is handled 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 radiation intensity in optically thin region
Initial data carries out the Inversion Calculation of fiber optic bundle emission optical chromatography.It is calculated by chromatographing, can obtain 1 optically thin area of object to be measured
The passband radiation intensity of domain inner space each point, so as to the object to be measured 1 that in optics thickness region, is reconstructed by infrared multi-vision visual
Surface topography and its passband radiation intensity blend, complete entire object to be measured 1 (including optically thin region and optics thickness area
Domain) space three-dimensional passband radiation intensity ItThe reconstruction of distribution, based on this can inverting object to be measured 1 (including optically thin region
And optics thickness region) physical quantitys such as space three-dimensional temperature, pressure, population density distribution, three-dimensional distribution results exist in real time
It is shown on computer 27, completes entire fusion visual detection.
Claims (1)
1. a kind of infrared fusion visual detection method, this method is regarded in the fusion based on fiber optic bundle chromatography and infrared multi-vision visual
Feel what is realized in detection system, the fusion visual detection system includes test platform (16), fiber optic bundle chromatographs subsystem, red
Outer vision subsystem, gigabit switch (26), computer (27)；It is characterized in that fusion visual detection method includes following step
Suddenly：
1) OFB passband radiation calibrations are carried out using blackbody furnace
A Fibre Optical Sensor unit detects an infrared radiation in each OFB, and wherein Fibre Optical Sensor unit uses infrared optical fiber；
OFB couples long wave unit component through output coupler, realizes passband fiber optic bundle tomography data acquisition, institute's raying is converted into mould
Intend voltage, become digital quantity after amplification and A/D transformation；
The n altogether of n OFB is multiplied by the passband black matrix spoke corresponding to each long wave unit component position of p root Fibre Optical Sensor units
Penetrate intensity It,jIt must all be demarcated in advance with the relationship of digital quantity；Wherein, n is integer more than or equal to 4, p be more than or equal to
Square of 10 integer, ItFor passband blackbody radiation intensity, j is the affiliated Fibre Optical Sensor unit of long wave unit component to be calibrated
Serial number, demarcate the method that uses for：
Fiber optic bundle chromatography 8~14 μm of wave-length coverage of detection is selected, black matrix furnace temperature is adjusted to temperature T, according to Planck blackbody spoke
It penetrates formula and calculates the corresponding passband blackbody radiation intensity I of temperature Tt, i.e. radiation curve under black matrix furnace temperature T is in 8~14 μm of models
The area enclosed；At blackbody furnace radial chamber distance L, the Fibre Optical Sensor unit to be calibrated of fixed placement one makes it sense end surface
It is aligned and perpendicular to blackbody furnace radial chamber center, it is D to measure Fibre Optical Sensor unit output digital quantity；Recording parameters value L, ItAnd D；
Black matrix furnace temperature T is adjusted, records another group of parameter value L, ItAnd D；After the calibration for completing entire blackbody furnace temperature range, change away from
From L, above step is repeated, it can be achieved that under different distance, under different passband blackbody radiation intensities, the output of Fibre Optical Sensor unit is digital
The calibration of amount；Due to the long wave unit component of every Fibre Optical Sensor unit, there are individual differences, it is therefore desirable to which every optical fiber is passed
Sense unit is demarcated, and reduces systematic error；Be finally completed n OFB amount to n be multiplied by p root Fibre Optical Sensor units difference away from
Passband blackbody radiation intensity I corresponding from Lt,jRelations I with exporting digital quantity Dt,j=f1(L, D, j) establishes the radiation of OFB passbands
Database；
2) infrared vision passband radiation calibration is carried out using blackbody furnace
In order to realize fiber optic bundle chromatography and the fusion of infrared multi-vision visual information, that is, provide the boundary constraint item of fiber optic bundle tomographic reconstruction
Part, it is necessary to solve the transfer problem of 8~14 μm of infrared image gray scales of passband and passband blackbody radiation intensity, that is, carry out infrared vision
Passband radiation calibration；
The infrared image composition pixel gray value G of each infrared surface battle array output in m infrared vision modules and passband black matrix
Radiation intensity It,iRelationship must all be demarcated in advance, m is integer more than or equal to 4, ItFor passband blackbody radiation intensity, i
For the serial number of infrared vision module to be calibrated, demarcate the method that uses for：
Black matrix furnace temperature is adjusted to temperature T, it is strong that the corresponding passband black body radiations of temperature T are calculated according to Planck radiation law
Spend It, i.e. radiation curve under black matrix furnace temperature T is in the area of 8~14 μ ms；It is fixed at blackbody furnace radial chamber distance L
An infrared vision module to be calibrated is placed, the infrared zooming lens of infrared vision module is adjusted, it is made to be correctly focused on black matrix
Stove radial chamber；Read the average ash of blackbody furnace radiation cavity segment in the infrared image of the infrared surface battle array output of the infrared vision module
Angle value G, recording parameters value L, It、G；Black matrix furnace temperature T is adjusted, records another group of parameter value L, ItAnd G；Complete entire blackbody furnace
After the calibration of temperature range, change distance L, repeat above step, it can be achieved that under different distance, different passband blackbody radiation intensities
Under, the calibration of the infrared image composition pixel gray value G of infrared vision module output；It is red due to each infrared vision module
Outside battle array is demarcated there are individual difference, therefore to all infrared surface battle arrays, can reduce systematic error；It is a red to be finally completed m
Amount to m infrared surface battle array under different distance L in outer vision module, 8~14 μm of infrared images composition pixel ash of output
Angle value G and passband blackbody radiation intensity It,iRelations It,i=f2(L, G, i) establishes the infrared vision passband radiation data of more mesh
Library；
3) MV and OFBT data acquire
Object to be measured is positioned on test platform, on the position at the different direction of warp and weft angles of equal radius of a ball R diameter of Spherical Volume,
By the installing plate on tripod pan/tilt head, n OFB of fixed placement, meanwhile, m infrared vision modules are mounted on m translation guide rail 8
On, make one-dimensional translation along translation guide rail and rotated around rotary rail, until the angle between each translation guide rail is equal, and m are red
Outer vision module can be fixed after R is equal to a distance from the diameter of Spherical Volume centre of sphere, by the infrared zooming lens of all infrared vision modules
Focus be adjusted to R；
The sensing head of each OFB is parallel collimation pore structure, which had not only ensured line signals acquisition but also met requirement of real-time；
Belong in the p root Fibre Optical Sensor units of an OFB and amount to p sensing head as one group, put into spatial filter in order
In location hole and fixed, sensing head outer diameter is equal with positioning bore dia, horizontal distance and vertical range between positioning holes center
It is equal, the spatial resolution requirements tested object to be measured can be met；
The fusion visual test of object to be measured is carried out, computer, fiber optic bundle are chromatographed subsystem and infrared vision by gigabit switch
Subsystem forms gigabit LAN, and computer obtains the related object to be measured of infrared vision subsystem output by gigabit LAN
To all pixels point gray value G of every road infrared picture data, it is red to compare more mesh for m roads infrared picture data under different angle
Outer vision passband radiation data library It,i=f2(R, G, i) is converted, and obtains m width with black matrix passband radiation intensity ItWhat is characterized is red
External radiation image data；
Meanwhile digital signal processing circuit is by controlling electronic switch that all n are multiplied by with each long wave of p root Fibre Optical Sensor units
Unit component carries out the control of working power, so as to fulfill in a manner of electronic shutter all long wave unit components of instantaneous starting to adopt
Collect the space multiple spot passband intensity signal that object to be measured enters each sensing head, while the output termination of each long wave unit component
Peak holding circuit makes collected space multiple spot passband intensity signal be converted into voltage signal and is latched in peak holding electricity
Lu Zhong；It is amplified by analogue amplifier, then is handled through digital signal processing circuit, simulation letter is carried out to all data
Number to digital signal transformation, obtain output digital quantity D, then compare OFB passband radiation datas library It,j=f1(R, D, j) is obtained
The passband radiation intensity initial data of object to be measured space multiple spot；
4) fused data is handled
To the m width in computer with black matrix passband radiation intensity ItThe infrared radiation images of characterization are carried out not using Harris operators
With the Corner Detection in region, area is carried out based on the image spatial domain that IR pass band is optically thin and the thick region of optics is different and frequency domain character
Regional partition carries out infrared radiation images feature corners Matching to m width based on the image matching algorithm of epipolar-line constraint, reconstructs mesh to be measured
Target surface topography, surface different zones boundary three-dimensional coordinate and passband blackbody radiation intensity value；According to the object to be measured of reconstruct
Surface different zones boundary three-dimensional coordinate, space segmentation is carried out to object to be measured, that is, is divided into that IR pass band is optically thin and optics
The work of infrared multi-vision visual for optics thickness region, directly using the surface topography of the object to be measured of reconstruct, that is, is completed in thick region
Make；For optically thin region, rebuild into following fiber optic bundle chromatography space three-dimensionals：
Using the surface different zones boundary three-dimensional coordinate and passband blackbody radiation intensity value reconstructed by infrared multi-vision visual as about
Beam, to the passband radiation intensity initial data of object to be measured space multiple spot that digital signal processing circuit processing obtains in step 3)
It is divided, the radiation intensity data in optics thickness region is given up, using the passband radiation intensity initial data in optically thin region
Carry out the Inversion Calculation of fiber optic bundle emission optical chromatography；It is calculated, can obtain empty inside the optically thin region of object to be measured by chromatographing
Between each point passband radiation intensity, so as to in optics thickness region, by the surface shape for the object to be measured that infrared multi-vision visual reconstructs
Looks and its passband radiation intensity blend, and complete entire object to be measured, including optically thin region and optics thickness region, space three-dimensional
Passband radiation intensity ItThe reconstruction of distribution, based on this can inverting object to be measured, including optically thin region and optics thickness region,
The distribution of the physical quantitys such as space three-dimensional temperature, pressure, population density, three-dimensional distribution results show on computers in real time,
Complete entire fusion visual detection.
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