CN208505578U - A kind of vehicular photoelectric equipment altitude environment performance impact analysis pilot system - Google Patents
A kind of vehicular photoelectric equipment altitude environment performance impact analysis pilot system Download PDFInfo
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- CN208505578U CN208505578U CN201820792537.XU CN201820792537U CN208505578U CN 208505578 U CN208505578 U CN 208505578U CN 201820792537 U CN201820792537 U CN 201820792537U CN 208505578 U CN208505578 U CN 208505578U
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Abstract
The utility model discloses a kind of vehicular photoelectric equipment altitude environment performance impact analysis pilot systems, scout car and diffusing reflection plate including being equipped with electro-optical system；The electro-optical system includes photoelectric platform, and the computer with photoelectric platform communication connection；It further include radiation source and the Portable weather station for the variation of real-time monitoring external environment；The diffusing reflection plate is installed on ground by fixation kit, and its primary optical axis and optical model its primary optical axis is located along the same line；The vehicular photoelectric equipment altitude environment performance impact analysis pilot system of the utility model, establish the radiative transfer model of target background, the comparative analysis influence of plateau and plains region propagation in atmosphere to Object-background contrast；The optical model for establishing vehicular photoelectric system has carried out simulation analysis to its imaging performance at temperature change, air pressure change and temperature and air pressure couple variations.
Description
Technical field
The utility model relates to a kind of vehicular photoelectric equipment altitude environment performance impact analysis pilot systems, belong to photoelectricity and set
Standby experimental technique field.
Background technique
The climatic environments such as the distinctive strong solar radiation in highlands, hypobaric hypoxia, big day and night temperature, can be to long under this environment
The structural parameters and working performance of the optoelectronic device of phase work generate large effect；The utility model is with the light of certain type scout car
Electric system is research object, and the influence generated to altitude environment to vehicular photoelectric system imaging quality is analyzed, and is devised
Altitude environment vehicular photoelectric image quality pilot system provides to further increase the environmental suitability research of vehicular photoelectric system
Effective method.
Utility model content
A kind of vehicular photoelectric equipment altitude environment performance impact analysis examination that in order to solve the above problems, the utility model proposes
Check system, establishes the radiative transfer model of target background, and comparative analysis plateau and plains region propagation in atmosphere carry on the back target
The influence of scape contrast；Plateau border vehicular photoelectric imaging test system is devised, and analyzes high altitude environment to vehicular photoelectric
The influence of system imaging quality.
The vehicular photoelectric equipment altitude environment performance impact analysis pilot system of the utility model, including Opto-electrical Section is installed
The scout car and diffusing reflection plate of system；The electro-optical system includes photoelectric platform, and the computer with photoelectric platform communication connection；Institute
Photoelectric platform is stated to be made of optical model and CCD camera group；The CCD camera group is by video collector and calculates electromechanical
Connection；It further include radiation source and the Portable weather station for the variation of real-time monitoring external environment；The diffusing reflection plate passes through
Fixation kit is installed on ground, and its primary optical axis and optical model its primary optical axis is located along the same line.
Further, the radiation source is the standard sources of sunlight or simulated solar irradiation.
Further, the Portable weather station includes solar energy change-over panel, and the storage being electrically connected with solar energy change-over panel
Electric installation, and the measure and control device being electrically connected with electrical storage device；The measure and control device includes central processing unit, and and central processing unit
The multiple sensors being electrically connected by data collector；The central processing unit is connect with computer communication, respectively by multiple
Sensors sense environmental temperature, humidity and air pressure, and will test after result is handled by data collector and be transmitted to central processing
Device, and be transmitted to computer through central processing unit and shown.
Still further, the sensor includes the temperature sensor for detecting environment temperature, and for detecting environment
The humidity sensor of humidity, and the baroceptor for detecting ambient pressure.
Further, the optical model its according to optical path direction of illumination successively by window, simple lens, cemented doublet,
Optical filtering and image planes are constituted.
Compared with prior art, the vehicular photoelectric equipment altitude environment performance of the utility model influences to divide
It pilot system is analysed, establishes the radiative transfer model of target background, comparative analysis plateau and plains region propagation in atmosphere are to mesh
Mark the influence of background contrasts；The optical model for establishing vehicular photoelectric system, to it in temperature change, air pressure change and temperature
Imaging performance under degree and air pressure couple variations has carried out simulation analysis；Plateau border vehicular photoelectric imaging test system is devised,
And analyze influence of the high altitude environment to vehicular photoelectric system imaging quality.
Detailed description of the invention
Fig. 1 is the altitude environment vehicular photoelectric imaging test system schematic of the utility model.
Fig. 2 is the connection schematic block diagram of the Portable weather station of the utility model.
Fig. 3 is the optical model schematic diagram of the utility model.
Fig. 4 is the target background radiative transfer model schematic diagram of the utility model.
Fig. 5 is the MODTRAN model functional block diagram of the utility model.
Fig. 6 is the direct solar radiation illumination schematic diagram in the different months of the utility model.
Fig. 7 is the sky background radiance schematic diagram in the different months of the utility model.
Fig. 8 is the path radiance schematic diagram in the different months of the utility model.
Fig. 9 is the atmospheric transmittance schematic diagram in the different months of the utility model.
Figure 10 is the performance contrast schematic diagram of the target and background in the different months of the utility model.
Figure 11 is the contrast descent coefficient schematic diagram of the target and background in the different months of the utility model.
Figure 12 is the defocus imaging schematic diagram of the utility model.
Figure 13 is the mtf value variation with temperature rule schematic diagram of the utility model；Wherein, A line indicates 0 visual field meridian
Sagitta of arc direction, B line indicate that 0.707 visual field meridian direction, C line indicate 0.707 visual field sagitta of arc direction, and D line indicates 1.0 visual field meridians
Direction, E line indicate 1.0 visual field sagitta of arc directions.
Figure 14 is the mtf value of the utility model with the changing rule schematic diagram of air pressure；Wherein, wherein A line indicates 0 visual field
Meridian sagitta of arc direction, B line indicate that 0.707 visual field meridian direction, C line indicate 0.707 visual field sagitta of arc direction, and D line indicates 1.0 visual fields
Meridian direction, E line indicate 1.0 visual field sagitta of arc directions.
Each component mark in attached drawing are as follows: 1- scout car, 2- diffusing reflection plate, 3- photoelectric platform, 31- optical model, 4- are calculated
Machine, 5- radiation source, 6- Portable weather station, 61- solar energy change-over panel, 62- electrical storage device, 63- measure and control device, in 631-
Central processor, 632- data collector, 633- temperature sensor, 634- humidity sensor, 635- baroceptor, 7- window,
8- simple lens, 9- cemented doublet, 10- optical filtering, 11- image planes.
Specific embodiment
Vehicular photoelectric equipment altitude environment performance impact analysis pilot system as shown in Figure 1 to Figure 3, including light is installed
The scout car 1 and diffusing reflection plate 2 of electric system；The electro-optical system includes photoelectric platform 3, and with 3 communication connection of photoelectric platform
Computer 4；The photoelectric platform 3 is made of optical model 31 and CCD camera group (not shown)；The CCD camera group is logical
Video collector is crossed to be electrically connected with computer 4；Further include radiation source 5 and changes for real-time monitoring external environment portable
Weather station 6；The diffusing reflection plate 2 is installed on ground by fixation kit, and its primary optical axis and its primary optical axis of optical model 31
It is located along the same line.
The radiation source 5 is the standard sources of sunlight or simulated solar irradiation.
The Portable weather station 6 includes solar energy change-over panel 61, and the electric power storage dress being electrically connected with solar energy change-over panel 61
62 are set, and the measure and control device 63 being electrically connected with electrical storage device 62；The measure and control device 63 includes central processing unit 631, and in
Central processor 631 passes through multiple sensors that data collector 632 is electrically connected；The central processing unit 631 is communicated with computer 4
Connection.
The sensor includes the temperature sensor 633 for detecting environment temperature, and for detecting the wet of ambient humidity
Spend sensor 634, and the baroceptor 635 for detecting ambient pressure.
The optical model 31 its according to optical path direction of illumination successively by window 7, simple lens 8, cemented doublet 9, filter
Mirror 10 and image planes 11 are constituted.
Its analysis method of the vehicular photoelectric equipment altitude environment performance impact analysis pilot system of the utility model, including it is right
Impact analysis of the propagation in atmosphere to the impact analysis of Object-background contrast and temperature and air pressure to Performance of Optical System.
(1) impact analysis of the propagation in atmosphere to Object-background contrast,
For vehicular photoelectric system when target and background is imaged, atmosphere is the primary link in imaging process；Atmosphere is one
Kind unstable transmission medium will be with the gas in atmosphere point when light radiation is transmitted in the optical medium of this complexity of atmosphere
The generations such as son, particulate absorb and the physical processes such as scattering, and so as to cause the decaying of radiation energy, this is to photoelectronic imaging system
System will generate direct influence to the detectivity of target；As shown in Fig. 4, using light system as initial point, it is denoted as X=0,
Target background is set to the place for being S with light system distance, is denoted as X=S, then in direct solar radiation and sky background
Under the action of radiation, it is bright that spoke of the target and background at optical system entrance pupil is calculated according to formula (1) and formula (2) respectively
Degree, and original Contrast's degree and the performance of target and background of target and background is calculated according to formula (3) and formula (4) respectively
Contrast；
In formula, Lo-sun、Lo-skyAnd LpathIt respectively indicates for entire visible light wave range, direct solar radiation, sky background
Radiation and path radiation at the target caused by spoke brightness,For in visible light wave range, atmosphere is averaged in observation path
Transmitance；
In formula, Lb-sun、Lb-skyAnd LpathIt respectively indicates for entire visible light wave range, direct solar radiation, sky background
Radiation and path radiation at the background caused by spoke brightness,For in visible light wave range, atmosphere is averaged in observation path
Transmitance；
In formula, C (0) is the apparent contrast of the target and background at observed range zero, Lo(0) and Lb(0) it is illustrated respectively in
Distance is the spoke brightness of the target and background observed at zero；
In formula, C (s) is the apparent contrast of the target and background at observed range s, and C (0) is the mesh at observed range zero
The apparent contrast of mark and background, Lpath(s) path radiance when be observed range being s, τ (s) is observed range when being s
Atmospheric transmittance；
The factors such as atmospheric radiation characteristic and position of sun, earth rotation revolution, observation place, observation time, weather condition
It is closely bound up, therefore be typically all to be carried out by various atmospheric transfer models when calculating, as shown in figure 5, being MODTRAN mould
Type functional block diagram；It is direct solar radiation illumination, the sky background radiance, path in different months as shown in Fig. 6 to Figure 11
Radiance, atmospheric transmittance, the performance contrast of target and background and target and background contrast descent coefficient schematic diagram,
It shows the direct solar radiation illumination of highlands and atmospheric transmittance is all larger than plains region, and sky background radiance
Plains region is respectively less than with path radiance；The contrast that propagation in atmosphere will cause target background reduces, but highlands
The contrast of target background is higher than plains region.
(2) impact analysis of temperature and air pressure to Performance of Optical System,
Under normal circumstances, Optical System Design is all to consider its work in normal temperature and pressure environment, but for being in height
Optical system in altitude environment, the temperature born, air pressure differ larger with design environment, lead to the imaging performance of system
Change because of the variation of its optical element structure parameter；
Assuming that optical system is by n group lens L1,L2…LnComposition, the focal length of each group lens is respectively f1,f2…fn, T0
For room temperature, P0For normal pressure；Therefore, temperature and air pressure change can first be analyzed to single lens LjDefocus situation, such as Figure 12 institute
Show, A point is object point, ajIt is distance of the object point to lens plane, bjIt is distance of the detector image-forming face to lens plane；Work as temperature
For T0, air pressure P0When, the focal length of lens is fj, the distance of ideal image point to lens plane is also b justj, the picture of object point at this time
It clearly focuses on detector image-forming face；When temperature becomes T, and air pressure becomes P, the focal length of lens becomes fj+Δfj, reason
The distance of imagination point to lens plane is cj, at this time on detector image-forming face, object point will be one piece of circular light spot by disperse；If
hjIndicate the radius of lens, rjIndicate disc of confusion radius, available according to Gauss formula:
Formula (5) and formula (6) are subtracted each other, and can be obtained:
Lens LjVertical axis magnifying power βjAre as follows:
Thus, lens LjImage speckles are as follows:
Lens LjSubsequent lens Lj+1Logitudinal magnification αj+1It may be expressed as:
αj+1=βj+1 2； (10)
In formula, βj+1For lens Lj+1Vertical axis magnifying power, then pass through lens LjThe image speckles of each group lens afterwards are as follows:
In formula, αj+1,nFor lens LjThe product of the logitudinal magnification of each group lens afterwards, it may be assumed that
αj+1,n=βj+1 2·βj+2 2…βn 2； (12)
It can be concluded that the image speckles of entire optical system are as follows:
When temperature even variation, lens LjFocal length variations amount are as follows:
Δfj=xfj·fj·ΔT； (14)
In formula, Δ T is temperature relative to room temperature T0Variable quantity, by formula (14) substitute into formula (13), change in temperature Δ T can be obtained
When, the image speckles of entire optical system are as follows:
When air pressure even variation, lens LjFocal length variations amount are as follows:
In formula, Δ P is air pressure relative to normal pressure P0Variable quantity, by formula (16) substitute into formula (15), air pressure change Δ P can be obtained
When, the image speckles of entire optical system are as follows:
It can be obtained by formula (15) and formula (16), when temperature and air pressure change simultaneously, the image speckles of entire optical system are as follows:
ΔXT,P=Δ XT+ΔXP； (18)
To the optical model of vehicular photoelectric system at temperature change, air pressure change and temperature and air pressure couple variations
Imaging performance carries out simulation analysis, and as shown in Figure 13 and Figure 14, temperature change is bigger, and mtf value decline is more serious, and imaging performance is got over
Difference；Mtf value forms the trend of monotone decreasing with the reduction of air pressure, and air pressure is lower, and imaging performance is poorer.
The vehicular photoelectric equipment altitude environment performance impact analysis pilot system of the utility model, establishes target background
Radiative transfer model, the comparative analysis influence of plateau and plains region propagation in atmosphere to Object-background contrast；Establish vehicle
The optical model for carrying electro-optical system, to its imaging at temperature change, air pressure change and temperature and air pressure couple variations
Simulation analysis is can be carried out；Plateau border vehicular photoelectric imaging test system is devised, and analyzes high altitude environment to vehicle-mounted light
The influence of electric system image quality.
Above-described embodiment is only the better embodiment of the utility model, therefore all according to the utility model patent application range
The equivalent change or modification that the structure, feature and principle is done, is included in the scope of the utility model patent application.
Claims (5)
1. a kind of vehicular photoelectric equipment altitude environment performance impact analysis pilot system, the scout car including being equipped with electro-optical system
With diffusing reflection plate；The electro-optical system includes photoelectric platform, and the computer with photoelectric platform communication connection；The photoelectric platform
It is made of optical model and CCD camera group；The CCD camera group is by video collector and calculates mechatronics；It is special
Sign is: further including radiation source and the Portable weather station for the variation of real-time monitoring external environment；The diffusing reflection plate is logical
It crosses fixation kit to be installed on ground, and its primary optical axis and optical model its primary optical axis is located along the same line.
2. vehicular photoelectric equipment altitude environment performance impact analysis pilot system according to claim 1, it is characterised in that:
The radiation source is the standard sources of sunlight or simulated solar irradiation.
3. vehicular photoelectric equipment altitude environment performance impact analysis pilot system according to claim 1, it is characterised in that:
The Portable weather station includes solar energy change-over panel, and the electrical storage device being electrically connected with solar energy change-over panel, and is filled with electric power storage
Set the measure and control device of electrical connection；The measure and control device includes central processing unit, and passes through data collector electricity with central processing unit
Multiple sensors of connection；The central processing unit is connect with computer communication.
4. vehicular photoelectric equipment altitude environment performance impact analysis pilot system according to claim 3, it is characterised in that:
The sensor includes the temperature sensor for detecting environment temperature, and the humidity sensor for detecting ambient humidity, and
For detecting the baroceptor of ambient pressure.
5. vehicular photoelectric equipment altitude environment performance impact analysis pilot system according to claim 1, it is characterised in that:
The optical model its be successively made of window, simple lens, cemented doublet, optical filtering and image planes according to optical path direction of illumination.
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