CN108204888A - A kind of emulation infrared dynamic scene simulator field calibration device - Google Patents
A kind of emulation infrared dynamic scene simulator field calibration device Download PDFInfo
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- CN108204888A CN108204888A CN201611176118.5A CN201611176118A CN108204888A CN 108204888 A CN108204888 A CN 108204888A CN 201611176118 A CN201611176118 A CN 201611176118A CN 108204888 A CN108204888 A CN 108204888A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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Abstract
The present invention provides a kind of emulation infrared dynamic scene simulator field calibration device, including infrared lens, rotatable optical filter wheel, infra-red radiation calibration black matrix, Infrared FPA image-forming assembly, frame frequency measurement assembly, control unit.It can be with parameters such as the spectral region of on-site rapid measurement dynamic scene simulator, frame frequency, radiation temperature, contrast, heterogeneity, distortion, field angles using the present invention.To sum up, the field calibration to dynamic scene simulator different parameters can be achieved on the covering device, can easily fully assess the performance of dynamic scene simulator, solve the normalization of existing infrared dynamic scene simulator calibration, systemic problem all the time.
Description
Technical field
The present invention relates to a kind of emulation infrared dynamic scene simulator field calibration devices, belong to infrared optics test school
Quasi- technical field.
Background technology
Infrared Imaging Seeker is applied since its strong antijamming capability, guidance precision are high in modern missile weapon system
It is increasingly wider.It is carried out in laboratory during emulation testing in Infrared Imaging Seeker, infrared dynamic scene simulator is wherein
The most important simulated test device being applied to.
When carrying out emulation testing to various Infrared Imaging Seeker using infrared dynamic scene simulator, infrared dynamic field
The many characteristics of scape simulator in itself all have to be calibrated, the typical such as spectral characteristic of infrared dynamic scene simulator,
Radiation temperature characteristic, object space geometrical property, uniformity characteristics etc. so that the infrared scene simulated with it is true infrared
Scene characteristic is identical, ensures the accuracy of emulation testing, and the Curve guide impeller for Infrared Imaging Seeker provides correct data.Mesh
The preceding domestic calibration about novel infrared dynamic scene simulator especially type field is calibrated, and not yet establishes a set of metering mark
It is accurate.The calibration of existing infrared dynamic scene simulator substantially utilizes various laboratory infrared test instruments, pieces together one
Non- mark system calibrates it, and adjustment time is long, and light path adjustment is complicated, and measurement process is also lack of standardization, does not form a unification
Measurement criteria.As Infrared Imaging Seeker develops towards high-performance direction, the requirement to infrared dynamic scene simulator
It is higher and higher, be badly in need of establishing the infrared dynamic scene simulator calibrating installation of a set of type field at home, to be developed to the country and
All kinds of infrared dynamic scene simulators of production are accurately and rapidly calibrated.
Invention content
For complete equipment calibrations more present in current Infrared scene simulation with image device calibration process are of high cost, efficiency is low, data
The problem of inaccurate, it is proposed that a kind of emulation infrared dynamic scene simulator field calibration device belongs to a kind of dynamic scene
Simulator field calibration device.
Technical scheme is as follows：
A kind of emulation infrared dynamic scene simulator field calibration device, including two groups of infrared lens, imaging len, filters
Mating plate wheel assembly, infra-red radiation correction black matrix component, Infrared FPA image-forming assembly, frame frequency measurement assembly, the position of above-mentioned each device
Relationship is：The light all the way of scenario simulation device is along input path direction successively by first group of infrared lens, optical filter wheel component
With infra-red radiation correction black matrix component, imaging len, Infrared FPA image-forming module；The other light path edge all the way of the scenario simulation device
Incident light is successively by second group of infrared lens, frame frequency measurement assembly.
The optical filter wheel component includes rotatable optical filter wheel and one group of bandpass filter：The rotatable optical filter
It takes turns as annular shape, several installation circular holes is evenly distributed on annulus, a pair of of reference blackbody is respectively placed in two symmetrical installations
On circular hole, for 180 degree between two reference blackbodies, the mounting hole positioned at a pair of of reference blackbody centre position is a through-hole, through-hole
90 degree away from reference blackbody, bandpass filter is installed on remaining mounting hole.The each optical filter thang-kng spectrum wave of bandpass filter
It is long different, it is made to cover 3 μm~5 μm of the design spectral region of the present apparatus by plated film processing technology.
The infrared lens and imaging len can be imaged the infra-red radiation that wavelength is 3 μm~5 μm.
The reference blackbody of two hole installations is nonuniformity correction black matrix on the optical filter wheel, and radiation magnitude can trace to the source
To the point-source blackbody radiation source of standard.
The reference blackbody temperature is controlled respectively at 5 DEG C higher than environment temperature and 10 DEG C high, and reference source uses red copper material
It makes, and temperature control is carried out to it using electronic cooling device, ensure temperature-controlled precision.
The invention also includes a control unit, described control unit includes external control module, data acquisition module, data
Processing and preserving module, the external control module complete the switching to optical filter wheel by serial ports, and matching program is completed different
The acquisition and storage of target image under spectral region are completed the parameter setting to frame frequency test scope by USB interface, are passed through
Gigabit Ethernet mouth is completed to Infrared FPA imaging device parameter setting；Data acquisition module is completed by gigabit ethernet interface
The acquisition of infrared image acquires the frame frequency measurement result of frame frequency measurement module by USB interface；Data processing and preserving module,
The temperature of each position of target is calculated by founding mathematical models, infrared field is calculated by mathematical formulae on this basis
Radiation temperature range, contrast, heterogeneity, distortion, the field angle of scape simulator.
The present invention makes different-waveband optical filter, calibration black matrix and through-hole be installed on same rotatable optical filter wheel, can press
As requested free switching, while meet the two point correction of light spectrum image-forming, through-hole imaging and imaging FPA components；
The present invention switches two correction black matrixes of optical filter successively in light path, and it is infrared to acquire black matrix by control module
The two point correction algorithm of Infrared FPA image-forming module is completed in imaging.
The tested scenario simulation device of the present invention exports under specific frequency, and highly sensitive point source detection device, which exports simulator, to be believed
It number is detected, after amplifying circuit processing and relevant treatment, by parameters such as high sensitivity oscilloscope measuring signal frequencies,
It is handled finally by software data and obtains scenario simulation device rate signals；
Control unit of the present invention controls optical filter, calibration black matrix, through-hole to switch over by serial ports, passes through USB interface control
Oscilloscope measurement parameter and data acquisition processed controls Infrared FPA component imaging parameters and data to acquire by gigabit Ethernet mouth；
The present invention establishes the mathematical model of infrared image gray scale and temperature, and is calibrated by standard blackbody and realize IR Scene
The measurement of simulator temperature calculates the radiation temperature model of export scenario simulation device on the basis of temperature survey by mathematical model
It encloses, contrast, heterogeneity.
The present invention is imaged using to standard dot matrix target, establishes the functional relation of dot matrix target imager coordinate and ideal coordinates, school
Quasi- Infrared FPA image-forming module and infrared lens systematical distortion, scene is calculated on the basis of ideal coordinates by mathematical model
The distortion of simulator and field angle.
The advantageous effect of the present invention compared with prior art：
The present invention, which realizes, at any time at the scene accurately and rapidly calibrates infrared dynamic scene simulator, calibration ginseng
Number includes spectral response, radiation characteristic, heterogeneity, resolution ratio, distortion, contrast, dynamic range etc., ensures infrared dynamic field
Scape simulator carries out Infrared Imaging Seeker the accurate reliability of each item data during emulation testing.
Description of the drawings
Included attached drawing is for the more clear composition and embodiment that illustrate the present invention, as the present invention's
One embodiment only represents the basic principle of the present invention, and industry professional technician can be on the basis of this principle
Embodiment, which is slightly split, changed or combined, without creative work can obtain related art scheme, these technical sides
Case is still fallen within the protection domain of this patent.
Fig. 1 is emulation infrared dynamic scene simulator field calibration device structure chart of the invention；
Fig. 2 is optical filter wheel structure diagram；
Fig. 3 is controlled for system and data processing software structure diagram.
Specific embodiment
Specific embodiments of the present invention are described in detail below in conjunction with attached drawing.In the following description, for solution
Purpose and not restrictive is released, elaborates detail, to help to be apparent from the present invention.However, to people in the art
It is readily apparent that the present invention can also be put into practice in the other embodiments departing from these details for member.
It should be noted that in order to avoid because having obscured the present invention during unnecessary details, only show in the accompanying drawings
The device structure closely related with scheme according to the present invention and/or processing step are gone out, and have been omitted with relationship of the present invention not
Big other details.
The embodiment of the present invention is illustrated with reference to the accompanying drawings.
As shown in Figure 1, a kind of emulation Infrared scene simulation with image device field calibration device, including two groups of infrared lens 2, imaging
Camera lens 5, optical filter wheel component, infra-red radiation correct black component 4, infrared imaging component 6, frame frequency measurement assembly 7, control unit 8；
As shown in Fig. 2, the optical filter wheel component includes rotatable optical filter wheel and one group of bandpass filter, wherein：
The rotatable optical filter wheel 3 is annular shape, several installation circular holes, a pair of reference are evenly distributed on annulus
Black matrix is respectively placed on two symmetrical installation circular holes, is 180 degree between two reference blackbodies, among a pair of of reference blackbody
The mounting hole of position is a through-hole, and 90 degree away from reference blackbody of through-hole installs several bandpass filters on remaining mounting hole.Optical filter
Ensure that its spectral transmission characteristic is mutually linked by plated film processing technology, in the present embodiment, be divided into 9, each optical filter leads to
Light spectral wavelength is different, and 3 μm~5 μm of the design spectral region of the present apparatus is covered by plated film processing technology.Rotate optical filter wheel
Enable dynamic scene simulator 1 be emitted infrared light optical axis by optical filter wheel be equipped with optical filter center of circular hole,
The echo signal light of transmission is imaged on by imaging len (5) on Infrared FPA image-forming module, forms the light for carrying spectral information
Spectrogram picture.Rotate optical filter wheel, it is possible to obtain the target emanation image of different spectrum segments.Different frequency is switched by calibration
Optical filter can obtain the target image of respective frequencies.
The reference blackbody of two hole installations is nonuniformity correction black matrix on optical filter wheel, and radiation magnitude can trace to the source to mark
Accurate point-source blackbody radiation source.Blackbody temperature controls at 5 DEG C higher than environment temperature and 10 DEG C high respectively.Reference source uses red copper material
Material makes, and temperature control is carried out to it using electronic cooling device, ensures temperature-controlled precision.
As one embodiment of the present of invention, optical filter wheel in Fig. 2 is adjusted, through-hole is made to be in light path, Infrared FPA imaging
Component is imaged target, and Infrared FPA image-forming assembly uses the operating mode of external sync, passes through regarding for scenario simulation device 1
Vertical synchronizing signal triggers the acquisition of image, avoids since scenario simulation device refreshing frequency and image-forming module frequency acquisition are inconsistent
Caused by be imaged flicker, final data transports to computer by gigabit Ethernet oral instructions.
As the embodiment of the present invention, frame frequency measurement assembly includes power detector, signal amplifier, oscillography
Device uses the response time as Microsecond grade, point source detection device of the signal output for analog signal, after amplifying by later stage signal,
It is measured by oscillograph, signal message is transmitted to computer by USB interface.
The invention also includes control unit 8, as shown in Figure 3.Described control unit 8 includes external control, data acquisition, number
According to processing and preserve three modules.External control module completes the switching to optical filter wheel by serial ports, and matching program is completed not
With the acquisition and storage of target image under spectral region, the parameter setting to frame frequency test scope is completed by USB interface, is led to
Gigabit Ethernet mouth is crossed to complete to Infrared FPA imaging device parameter setting；Data acquisition module is complete by gigabit ethernet interface
Into the acquisition of infrared image, the frame frequency measurement result of frame frequency measurement module is acquired by USB interface；Data processing and preservation mould
Block, the temperature of each position of target is calculated by founding mathematical models, is calculated on this basis by mathematical formulae red
Radiation temperature range, contrast, heterogeneity, distortion, the field angle of outer scene simulator.Spectral region can be by switching not
Same optical filter imaging can be led.Finally all results are summarized and are exported.
The course of work and operation principle of the present invention：
System is broadly divided into self-aligning and the calibration to dynamic scene simulator, as one embodiment of the present of invention,
System self-aligning utilizes Nonuniformity Correction device of the present invention, black using two controllable temperatures on optical filter wheel
Body corrects to carry out the live Fast Inhomogeneous of imaging FPA components itself；The distortion of system itself is calibrated, using standard
Mesh distortion target.The polynomial relation of ideal coordinates and actual acquisition image coordinate is established by least square method, completes to adopt
Collect transformation of the image coordinate to ideal coordinates.
As one embodiment of the present of invention, dynamic scene simulator frame frequency calibration process is as follows, dynamic scene simulator
It is placed in before calibrating installation, adjusts light axis consistency, setting dynamic scene simulator is in corresponding working state, sends out infrared spoke
It penetrates, after infra-red radiation is first by infrared lens 2, into frame frequency measurement module.Infrared dynamic scene simulator is in certain frequency
When under working condition, IR point source detector output signal by amplification band circuit is followed by into oscillograph, by oscillograph into
The appropriate parameter setting of row, oscillograph can be with the frequency of measuring signal.Detectivity, response wave band, the frequency of point source detection device are special
The indexs such as property should meet testing requirement.Oscilloscope measurement signal is transmitted to computer, and infrared dynamic scene simulator is calculated
Frame frequency.
As one embodiment of the present of invention, dynamic scene simulator other parameter calibration process is as follows, dynamic scene mould
Intend device to be placed in before calibrating installation, adjust light axis consistency, setting dynamic scene simulator is in corresponding working state, sends out red
External radiation, after infra-red radiation is first by infrared lens 2, by corresponding optical filter on optical filter wheel 3, and by imaging len
After 5, infra-red radiation is imaged on Infrared FPA component 6, and the corresponding signal of infra-red radiation, infrared dynamic field are obtained by computer
The calibration infrared light of the parameters such as the analog temperature range of scape simulator, contrast, heterogeneity, distortion, field angle is according to this
Process passes to, and does not know to need to carry out dynamic scene simulator different setting and operation in different parameters test process.
As one embodiment of the present of invention, Dynamic IR Scene simulator point is controlled during analog temperature range calibration
Not Shu Chu full black and full white image, control optical filter wheel lead to the hole site be in light path, to scenario simulation device output image progress
Acquisition.The mean temperature of all black picture is obtained using data processing module, is denoted as T1, the average temperature of full white image is then obtained
Degree, is denoted as T2, then the analog temperature of infrared dynamic scene simulator ranging from T1~T2.
Control dynamic scene simulator output half black half white as one embodiment of the present of invention, during contrast calibration
Image is obtained the two-part mean temperature of image black and white using software, is recorded as T1, and the mean temperature of complete white part is then obtained
T2 is recorded as, calculates the Integrated radiance emittance M of completely black part and complete white part in corresponding wave bandT1And MT2, last basisObtain the contrast of Infrared scene simulation with image device.
As one embodiment of the present of invention, control dynamic scene simulator output gray level is during nonuniformity calibration
The image taken is carried out gray level analysis by the homogeneous image of semi-saturation state, and the average value of gray level is G in image, mark
Quasi- deviation is Sg, then can be by formulaCalculate the output image non-uniform of infrared dynamic scene simulator.
As one embodiment of the present of invention, dynamic scene simulator is controlled to generate four asterism figures during distortion calibration
Picture, wherein two upper left corners and the upper right corner for being located at visual field, in addition two left ends and right end for being located at visual field horizontal central line, original
Image is exported, ensures that two asterism distance of upper end is stringent equal with two asterism of horizontal central line distance.The image of shooting is analyzed,
Two asterism actual pixels distance l of upper end is calculated by software1With two asterism pixel distance l of center line2, then the marginal distortion of image is
As one embodiment of the present of invention, dynamic scene simulator is controlled to be exported in full filed during Calibration
Full white image analyzes the image taken, and calibrating installation transverse field angle is denoted as α, longitudinal field angle β, horizontal pixel
Number scale is A, and longitudinal pixel is denoted as B；The image taken longitudinally occupies pixel number as a, longitudinally occupies pixel number as b；Pass through meter
The horizontal and vertical visual field of Infrared scene simulation with image device can be obtained by calculating.In the distortion, field angle measurement process, pixel coordinate is all
It is the ideal coordinates after distortion calibration.
Although describing technical scheme of the present invention with reference to preferred embodiment, those skilled in the art easily manage
Solution, protection scope of the present invention are not limited to these specific embodiments, in the basic principle without departing from the present invention
In the case of, the technical solution after can the embodiment and particular technique feature therein being split, combine or be changed is still
It will fall under the scope of the present invention.
Unspecified part of the present invention is known to the skilled person.
Claims (7)
1. a kind of emulation infrared dynamic scene simulator field calibration device, which is characterized in that including two groups of infrared lens
(2), imaging len (5), optical filter wheel component, infra-red radiation correction black matrix component (4), Infrared FPA image-forming assembly (6), frame frequency
Measurement assembly (7), the light path trend of above-mentioned each device are：The light all the way of scenario simulation device (1) along input path direction successively
By first group of infrared lens (2), optical filter wheel component and infra-red radiation correction black matrix component (4), imaging len (5), infrared
FPA image-forming modules (6)；In addition light path passes through second group of infrared lens to the scenario simulation device (1) successively along incident light all the way
(2), frame frequency measurement assembly (7).
2. a kind of emulation infrared dynamic scene simulator field calibration device according to claims 1, feature exist
In, the optical filter wheel component includes rotatable optical filter wheel and one group of bandpass filter, wherein：
The rotatable optical filter wheel (3) is annular shape, several installation circular holes is evenly distributed on annulus, a pair is with reference to black
Body is respectively placed on two symmetrical installation circular holes, is 180 degree between two reference blackbodies, positioned at a pair of of reference blackbody interposition
The mounting hole put is a through-hole, and 90 degree away from reference blackbody of through-hole installs bandpass filter on remaining mounting hole.
3. according to the infrared dynamic scene simulator field calibration device of emulation described in claims 2, which is characterized in that described
The each optical filter thang-kng spectral wavelength of bandpass filter is different, it is made to cover the design spectrum of the present apparatus by plated film processing technology
3 μm~5 μm of range.
4. according to the infrared dynamic scene simulator field calibration device of emulation described in claims 1, which is characterized in that described
Infrared lens (2) and imaging len (5) can be imaged the infra-red radiation that wavelength is 3 μm~5 μm.
5. a kind of emulation infrared dynamic scene simulator field calibration device according to claims 2, feature exist
In the reference blackbody of two hole installations is nonuniformity correction black matrix on the optical filter wheel, and radiation magnitude can trace to the source to mark
Accurate point-source blackbody radiation source.
6. a kind of emulation infrared dynamic scene simulator field calibration device according to claims 2, feature exist
Controlled respectively in, the reference blackbody temperature it is at 5 DEG C higher than environment temperature and 10 DEG C high, reference source using red copper material making,
And temperature control is carried out to it using electronic cooling device, ensure temperature-controlled precision.
7. a kind of emulation infrared dynamic scene simulator field calibration device according to claims 1, feature exist
In further including a control unit, described control unit includes external control module, data acquisition module, data processing and preservation
Module, the external control module complete the switching to optical filter wheel by serial ports, and matching program is completed under different spectral regions
The acquisition and storage of target image complete the parameter setting to frame frequency test scope by USB interface, pass through gigabit Ethernet
Mouth is completed to Infrared FPA imaging device parameter setting；Data acquisition module completes infrared image by gigabit ethernet interface
Acquisition acquires the frame frequency measurement result of frame frequency measurement module by USB interface；Data processing and preserving module, by establishing number
The temperature that model calculates each position of target is learned, Infrared scene simulation with image device is calculated by mathematical formulae on this basis
Radiation temperature range, contrast, heterogeneity, distortion, field angle.
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Cited By (6)
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| CN109269642A (en) * | 2018-08-30 | 2019-01-25 | 上海机电工程研究所 | IR image enhancement device and method based on optical filter colour wheel |
| CN113008381A (en) * | 2021-03-15 | 2021-06-22 | 东莞先导先进科技有限公司 | Thermal infrared imager device and real-time temperature calibration method thereof |
| CN113588094A (en) * | 2021-08-13 | 2021-11-02 | 超晶科技（北京）有限公司 | High-low temperature comprehensive infrared test system |
| CN113859574A (en) * | 2020-06-30 | 2021-12-31 | 北京振兴计量测试研究所 | Device and method for detecting optical load performance of unmanned aerial vehicle in flight state |
| CN114370941A (en) * | 2020-10-14 | 2022-04-19 | 北京振兴计量测试研究所 | Bicolor medium-wave infrared radiation simulation source, simulation system and simulation method thereof |
| CN114577065A (en) * | 2020-12-02 | 2022-06-03 | 北京振兴计量测试研究所 | Excitation source for infrared scene simulation, simulation device and simulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109269642A (en) * | 2018-08-30 | 2019-01-25 | 上海机电工程研究所 | IR image enhancement device and method based on optical filter colour wheel |
| CN109269642B (en) * | 2018-08-30 | 2021-10-22 | 上海机电工程研究所 | Infrared image generation device and method based on color filter wheel |
| CN113859574A (en) * | 2020-06-30 | 2021-12-31 | 北京振兴计量测试研究所 | Device and method for detecting optical load performance of unmanned aerial vehicle in flight state |
| CN113859574B (en) * | 2020-06-30 | 2024-01-05 | 北京振兴计量测试研究所 | Unmanned aerial vehicle optical load performance detection device and method in flight state |
| CN114370941A (en) * | 2020-10-14 | 2022-04-19 | 北京振兴计量测试研究所 | Bicolor medium-wave infrared radiation simulation source, simulation system and simulation method thereof |
| CN114577065A (en) * | 2020-12-02 | 2022-06-03 | 北京振兴计量测试研究所 | Excitation source for infrared scene simulation, simulation device and simulation method |
| CN113008381A (en) * | 2021-03-15 | 2021-06-22 | 东莞先导先进科技有限公司 | Thermal infrared imager device and real-time temperature calibration method thereof |
| CN113588094A (en) * | 2021-08-13 | 2021-11-02 | 超晶科技（北京）有限公司 | High-low temperature comprehensive infrared test system |
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