CN110186655A - Imaging detection distance test system based on simulated target and optical energy attenuation device - Google Patents
Imaging detection distance test system based on simulated target and optical energy attenuation device Download PDFInfo
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to photo electric imaging system Performance Evaluation Technique fields, and in particular to a kind of imaging detection distance test system based on simulated target and optical energy attenuation device.Difficult, the problem that test process atmosphere is larger to the measurement difficulty of attenuation, test result accuracy and precision are low is chosen to solve test target of the existing technology.The present invention system is simulated respectively by two integrating spheres and the illumination of control observation target and environment scene background, it is overlapped by projecting in light curtain target beam and the background light velocity simultaneously, the observation object of different illumination, size, contrast is simulated using light curtain pattern, by transmitting the change of area of section to collimated light beam, analog regulation transmits the attenuation of luminous energy.
Description
Technical field
The present invention relates to photo electric imaging system Performance Evaluation Technique fields, and in particular to one kind is based on simulated target and luminous energy
The imaging detection distance test system of attenuator.
Background technique
Isologue distance light electric imaging system in adjustment and overall performance evaluation procedure, the detectable distance of system and identification away from
From an important technology index for being system performance evaluation.During actual test, due to set distance, it is sized, if
The target for determining illumination and contrast is difficult to find that detection and the identification distance test of photo electric imaging system can only select in nature
Fixed some existing targets are tested with scene, it is difficult to a large amount of satisfactory observed object and scene are obtained, to limit
The accuracy of test result is made.On the other hand, the light beam of the reflection of target being observed body surface or transmitting, in propagation in atmosphere mistake
There is decaying in journey, and the size of attenuation is to determine one of the principal element of photo electric imaging system detection range.Therefore existing
Technology has that the larger measurement difficulty to attenuation, test result accuracy and precision are low, influences photoelectronic imaging system
The detection performance test data property of can refer to of uniting and applicability.
Summary of the invention
In view of this, choosing difficult, survey of the test process atmosphere to attenuation for test target of the existing technology
Determine larger difficulty, test result accuracy and the low problem of precision, provide it is a kind of can be tested indoors based on simulation
The imaging detection distance test system of target and optical energy attenuation device.
In order to solve the problems existing in the prior art, the technical scheme is that
Imaging detection distance test system based on simulated target and optical energy attenuation device, it is characterised in that: by simulated target
Subsystem and simulated optical energy decaying subsystem two parts composition；
The simulated target subsystem is by simulated target light source, the first rectangular aperture, the second rectangular aperture, simulated target
Projection lens set, projection light curtain, simulation background light source, simulated target projection lens set and parallel light tube composition；The simulation mesh
Mark light source controls power supply with target light source brightness respectively and target light source illumination photometer is connect；The simulation background light source respectively with back
Scape light-source brightness control power supply is connected with background light source illumination photometer；Being arranged side by side at the simulated target light source light-emitting window has first
The rectangle light-emitting window of rectangular aperture and the second rectangular aperture, the first rectangular aperture and the second rectangular aperture is adjustable structure, and
Adjustment direction is orthogonal, and two on the first rectangular aperture and the second rectangular aperture square type light admission port is respectively positioned on simulated target throwing
The focal plane of shadow lens group；The light-emitting window of the simulation background light source is located at the focal plane of simulation background projection lens set；
The projection light curtain is located on the focal plane of parallel light tube, described from simulated target projection lens set and simulation background projecting lens
The collimated light beam of group outgoing is overlapped in the same area of projection light curtain to be emitted to form simulation infinity mesh through parallel light tube
Mark；
The optical energy attenuation subsystem is described by " L " type pipeline, the adjustable circular iris in aperture and plane mirror composition
One end of " L " type pipeline be set at the light-emitting window of parallel light tube, what the bore of " L " type pipeline was greater than parallel light tube goes out light
Mouthful, and inner wall of the pipe is coated with diffusing reflection coating；The place of turning back of " L " type pipeline is provided with circular iris and plane mirror, puts down
Face reflecting mirror is stacked on the outside of circular iris, and efficient beam reflective surface area is adjusted by the adjustable circular iris in aperture.
Imaging system provided by the invention is a kind of indoor test system, compared with prior art, advantages of the present invention
It is as follows:
1, the present invention is realized by double light sources project beam combination systems, parallel light tube, reflection flux regulating system
Infinity target simulation and the optical energy attenuation simulation that illumination, size, contrast can accurately be set surely, for tested imaging system of looking in the distance
The observed object of different distance, different size, different observation contrasts is provided；
2, the present invention is detected with photo electric imaging system and is combined with identification and evaluation standard, can test out photo electric imaging system
For the detection and recognition capability of different size and contrast target under different atmospheric environments, this system simulated target is shone
Degree, size and contrast, optical energy attenuation system can accurately be set, can for tested photo electric imaging system detection away from
From test design scheme, sufficient test data sample is obtained, analysis obtains accurate test result；
3, the present invention is by adjusting integrating sphere illuminance, diaphragm size to observed object illumination, size, contrast and light beam
Transmission attenuation is accurately set, by simulating in different illumination, size, contrast observed object and light transmission attenuation
The accurate test, it can be achieved that the detectable distance of imaging system and recognizable distance is tested under environment.
Detailed description of the invention
Fig. 1 is present system composite structural diagram；
Fig. 2 is simulated optical energy attenuator composition schematic diagram；
Description of symbols: 1, target light source illumination photometer, 2, target light source brightness control power supply, 3, simulated target light source, 4, the
One rectangular aperture, the 5, first rectangular aperture height adjustment knob, the 6, second rectangular aperture, the rotation of the 7, second rectangular aperture width adjusting
Button, 8, simulated target projection lens set, 9, projection light curtain, 10, simulation background light source, 11, simulated target projection lens set, 12,
Parallel light tube, 13, parallel light tube light-emitting window, 14, background light source brightness control power supply, 15, background light source illumination photometer, 16, " L " type
Pipeline, 17, tested photo electric imaging system, 18, circular iris, 19, regulation handle, 20, plane mirror, 21, regulation handle tune
Save direction.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of based on the test of the photo electric imaging system detection range of simulated target and simulated optical energy attenuator
System, the system simulates illumination of simultaneously control observation target and environment scene background by two integrating spheres respectively, by by mesh
Mark light beam and the background light velocity project in light curtain simultaneously to be overlapped, and simulates different illumination, size, contrast using light curtain pattern
Observation object, pass through to collimated light beam transmit area of section change, analog regulation transmit luminous energy attenuation.
Embodiment:
Referring to Fig. 1, the present invention is based on the imaging detection distance test systems of simulated target and optical energy attenuation device, by simulation mesh
Mark subsystem and simulated optical energy decaying subsystem two parts composition；
The simulated target subsystem is by simulated target light source 3, the first rectangular aperture 4, the second rectangular aperture 6, simulation
Target projection lens group 8, projection light curtain 9, simulation background light source 10, simulated target projection lens set 11 and 12 groups of parallel light tube
At；The simulated target light source 3 controls power supply 2 with target light source brightness respectively and target light source illumination photometer 1 is connect；The simulation
Background light source 10 controls power supply 14 with background light source brightness respectively and background light source illumination photometer 15 is connect；The simulated target light source
Being arranged side by side at 3 light-emitting windows has the first rectangular aperture 4 and the second rectangular aperture 6, the first rectangular aperture 4 and the second rectangular aperture 6
Rectangle light-emitting window be adjustable structure, and adjustment direction is orthogonal, on the first rectangular aperture 4 and the second rectangular aperture 6
Two square type light admission ports are respectively positioned on the focal plane of simulated target projection lens set 8；The light-emitting window of the simulation background light source 10
Positioned at the focal plane of simulation background projection lens set 11；The projection light curtain 9 is located on the focal plane of parallel light tube 12, described
The collimated light beam being emitted from simulated target projection lens set 8 and simulation background projection lens set 11 is in the same zone of projection light curtain 9
It is overlapped to be emitted through parallel light tube 12 in domain and forms simulation infinity target；
The optical energy attenuation subsystem is by " L " type pipeline 16, the adjustable circular iris 18 in aperture and 20 groups of plane mirror
At one end of " L " the type pipeline 16 is set at the light-emitting window of parallel light tube 12, and the bore of " L " type pipeline 16 is greater than flat
The light-emitting window 13 of row light pipe 12, and inner wall of the pipe is coated with diffusing reflection coating；The place of turning back of " L " type pipeline 16 is provided with circular light
Door screen 18 and plane mirror 20, plane mirror 20 are stacked in 18 outside of circular iris, efficient beam reflective surface area through hole
Diameter is adjustable, and circular iris 18 is adjusted.
The simulated target light source 3 controls power supply 2 with target light source brightness respectively and target light source illumination photometer 1 is connected, mould
Illuminance can control power supply 2 by target light source brightness and adjust at quasi- 3 light-emitting window of target light source, and be shown in target light source photograph
On degree meter 1；The background light source 10 controls power supply 14 with background light source brightness respectively and background light source illumination photometer 15 is connected, background
Illuminance can control power supply 14 by control background light source brightness and adjust at 10 light-emitting window of light source, and be shown in background light source photograph
On degree meter 15.
First rectangular aperture 4 and the second rectangular aperture 6 can be adjusted by the first rectangular aperture adjusting knob 5 respectively
The height of square type clear aperture, the second rectangular aperture width adjusting knob 7 adjust the width of square type light admission port；The projection light curtain
9 are set on the focal plane of parallel light tube 12, receive and come from simulated target projection lens set 8 and simulation background projection lens set 11
Light beam, the superposition of this two-beam, which is transmitted across projection light curtain 9 through parallel light tube 12, forms the simulations of different illumination different contrasts
Target；
Selected circular iris 18 is made of several blades, and the surface of blade can be absorbed one by spray treatment
Light splitting energy, and so that reflected light is become a degree of and diffuse, the adjustable circular iris aperture of the folding angle of blade
Size.
The efficient beam reflective surface area of above-mentioned plane mirror 20 is adjusted by circular iris 18, the table of plane mirror 20
The gating to light source light spectrum is realized by being coated with different membrane systems in face.
It is fixed between above-mentioned circular iris 18 and plane mirror 20 by high-precision fixed plane.
The normal and 12 optical axis included angle A of parallel light tube of above-mentioned plane mirror 20 and the bent angle size 2A of " L " type pipeline 16
It can be required to be designed adjustment according to test macro installation environment, the representative value of included angle A takes 450.
When measurement, photo electric imaging system to be measured is set on the outside of the port of " L " type pipeline.
Concrete application 1 of the invention:
If need to be B according to setting value simulated target illumination0Object, illumination B0It can be calculated and be obtained by following formula:
E in formula (1)gIt is the sky illuminance as caused by sunlight, K is target being observed surface diffusing reflection coefficient.
After calculating acquisition testee surface reflection illuminance by ambient lighting and physical surface characteristics parameter, pass through
Target light source brightness controls the adjusting knob of power supply 2, changes 3 illumination of simulated target light source.Simulated target illumination exact value is
The illumination of projection light curtain is crossed, there are a ratio system τ with target light source illumination photometer 1 for it1, this value can by calibration obtain
?.Therefore, the setting value of simulated target light source 3 should be B0/τ1。
By adjust the first rectangular aperture 4 the first rectangular aperture height adjustment knob 5 and the second rectangular aperture 6 second
Rectangular aperture width adjusting knob 7 change rectangular aperture length and width, also just change adjust square type diaphragm clear aperture length and
Degree, changes the size of observed object, the ruler of target being observed is generally defined with the catercorner length for being observed object boundary rectangle
Very little L.There are proportionate relationship k between the size of the rectangular light spot of the value and transmission projection light curtain of L1, proportionate relationship k1By simulated target
The focal length of projection lens set 8 determines.The size for projecting simulated target at light curtain is L × k1。
Concrete application 2 of the invention:
Referring to Fig.1, if need to be B according to setting value simulated environment background illuminance1, power supply 14 is controlled by background light source brightness
Adjusting knob, change 10 illumination of simulation background light source.Simulation background illumination exact value be through projection light curtain illumination, it with
There are a ratio system τ between the indicating value of background light source illumination photometer 152, this value, which can pass through to demarcate, to be obtained.Therefore, it simulates
The setting value of target light source 3 should be B1/τ2。
According to the above process, the simulated target that illumination, size, contrast are all satisfied setting value can be obtained.
Concrete application 3 of the invention:
Referring to Figures 1 and 2, if needing analogue observation distance is R, atmospheric transmittance τa(R) optical energy attenuation experiment scene.
Atmospheric transmittance is τa(R) it can be calculated and be obtained with following formula.
R in formula (2): observed range R, Rv: atmospheric visibility, γ: for optical wavelength, q 1.3.It can be with from formula (2)
Obtain different observed range beam energy attenuation coefficients.
Work as τa(R) according to observed range R determine after, can by change the adjustable circular iris 18 in aperture radius size,
Acquisition optical energy attenuation is τa(R) beam Propagation simulates effect, the specific steps are as follows:
If 1) normal angle of the optical axis of parallel light tube 12 and plane mirror 20 is A, radius is reflected by the aperture of r
Luminous energy are as follows:
D is the radius of parallel light tube light-emitting window diameter 13, k in formula (3)2For the reflectivity of plane mirror 20.
2) τ is takena(R)=τ 'a, then the radius r of the aperture that can be set is adjustable circular iris 18 are as follows:
3) as shown in Fig. 2, being provided with regulation handle 19 on the adjustable circular iris 18 in the aperture selected in the present embodiment, respectively
Blade adjusts the size in circular iris aperture by regulation handle 19, sets circular iris radius as r size, when regulation handle 19
When moving to right end, the aperture of the diaphragm is maximum, i.e. r is maximum, if included angle A is equal to 450, this is that optical energy attenuation ratio is 0.707.
As shown in Fig. 2, the regulation handle 19 on mobile circular iris, to Far Left, circular iris aperture reaches maximum, right
Answering radius is the radius d of parallel light tube light-emitting window diameter 13, is moved to rightmost, circular iris aperture radius becomes 0.It is mobile round
For diaphragm clear aperature regulation handle 19 by Far Left to rightmost, the radius r of aperture is adjustable circular iris 18 is nonlinear change
's.According to measurement by the corresponding relationship scale mark of regulation handle 19 and radius r the adjustable circular iris 18 of Circular Aperture hand
First handle, and reaches certain precision, can be realized according to observed range, calculate τa(R), the adjustable circular iris 18 in aperture is set
Radius r, realize optical energy attenuation analog functuion.
Referring to Fig.1, in the optical path by the installation of tested photo electric imaging system 21, after realizing light axis consistency adjustment, Ji Ketong
Cross the above process, simulation setting object illumination, size and contrast.Size of the simulated target relative to tested photo electric imaging system
Instantaneous field of view's angle equal principle is followed, i.e. simulation article size L × k1With the ratio between the focal length f of parallel light tube 12 and object in photoelectricity
The size of imaging system imaging is equal with the ratio between photo electric imaging system focal length.It is corresponding to concurrently set beam Propagation optical energy attenuation
Circular iris radius r, the image data for acquiring photo electric imaging system divide the detection of photo electric imaging system and recognition performance
Analysis.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (1)
1. the imaging detection distance test system based on simulated target and optical energy attenuation device, it is characterised in that: by simulated target
System and simulated optical energy decaying subsystem two parts composition；
The simulated target subsystem is by simulated target light source (3), the first rectangular aperture (4), the second rectangular aperture (6), mould
Quasi- target projection lens group (8), projection light curtain (9), simulation background light source (10), simulated target projection lens set (11) with it is parallel
Light pipe (12) composition；The simulated target light source (3) controls power supply (2) and target light source illumination photometer with target light source brightness respectively
(1) it connects；The simulation background light source (10) controls power supply (14) and background light source illumination photometer with background light source brightness respectively
(15) it connects；Being arranged side by side at simulated target light source (3) light-emitting window has the first rectangular aperture (4) and the second rectangular aperture
(6), the rectangle light-emitting window of the first rectangular aperture (4) and the second rectangular aperture (6) is adjustable structure, and adjustment direction hangs down mutually
Directly, two square type light admission ports on the first rectangular aperture (4) and the second rectangular aperture (6) are respectively positioned on simulated target projection lens set
(8) focal plane；The light-emitting window of the simulation background light source (10) is located at the focal plane of simulation background projection lens set (11)
Place；Projection light curtain (9) is located on the focal plane of parallel light tube (12), described from simulated target projection lens set (8) and mould
The collimated light beam of quasi- background plane lens group (11) outgoing is overlapped in the same area of projection light curtain (9) through parallel light tube
(12) outgoing forms simulation infinity target；
The optical energy attenuation subsystem is by " L " type pipeline (16), the adjustable circular iris in aperture (18) and plane mirror (20)
Composition, one end of " L " the type pipeline (16) are set at the light-emitting window of parallel light tube (12), the mouth of " L " type pipeline (16)
Diameter is greater than the light-emitting window (13) of parallel light tube (12), and inner wall of the pipe is coated with diffusing reflection coating；" L " type pipeline (16) turn back
Place is provided with circular iris (18) and plane mirror (20), and plane mirror (20) is stacked on the outside of circular iris (18),
Efficient beam reflective surface area is adjusted by the adjustable circular iris in aperture (18).
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