CN114370941A - Bicolor medium-wave infrared radiation simulation source, simulation system and simulation method thereof - Google Patents
Bicolor medium-wave infrared radiation simulation source, simulation system and simulation method thereof Download PDFInfo
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Abstract
The invention provides a bicolor medium wave infrared radiation simulation source, a simulation system and a simulation method thereof, wherein the simulation source comprises: the infrared light source components are used for providing first infrared light beams or second infrared light beams with different wave bands; the radiation intensity adjusting assembly is arranged right in front of the plurality of groups of infrared light source assemblies; the control assembly is used for controlling the infrared light source assembly and the radiation intensity adjusting assembly so as to adjust the radiation intensity of the first infrared beam and/or the second infrared beam. By controlling the multiple groups of infrared source components to perform rough adjustment on the radiation intensity, fine adjustment on the radiation intensity and selection of radiation wave bands through the radiation intensity adjusting components, the infrared radiation characteristic of a typical target is simulated to the maximum extent, so that the calibration precision and accuracy of the infrared imaging system can be greatly improved, and the accurate evaluation on the performance of the weapon system is ensured.
Description
Technical Field
The invention relates to the technical field of infrared radiation measurement and calibration, in particular to a bicolor medium wave infrared radiation simulation source, a simulation system and a simulation method thereof.
Background
Along with the improvement of national defense weapon equipment level, an infrared imaging guidance technology for detecting and identifying a typical target by utilizing infrared radiation characteristics under different wave bands becomes the mainstream trend of the research and production of weapon equipment systems in the military field. The bicolor medium wave infrared radiation simulation source is key ground equipment of a semi-physical simulation system, and simulates the change of infrared radiation characteristics of a typical target under a dual-waveband condition under different postures and different environmental conditions. In the model development process, the infrared imaging guidance system is used as an input target source to carry out comprehensive test and accurate performance evaluation on the infrared imaging guidance system.
At present, a lot of research is carried out on infrared simulation sources by some domestic metering mechanisms, and corresponding devices are formed, but the infrared radiation source devices cannot simulate continuous infrared radiation with a certain rule, so that an infrared imaging guidance system cannot be calibrated accurately.
Disclosure of Invention
In view of the above-mentioned problem that the existing ir radiation source device cannot simulate the ir radiation characteristics of a typical target, the present invention has been made to provide a two-color medium wave ir radiation simulation source, a simulation system and a simulation method thereof that overcome or at least partially solve the above-mentioned problem.
According to one aspect of the invention, there is provided a bichromatic mid-wave infrared radiation analog source comprising:
the infrared light source components are used for providing first infrared light beams or second infrared light beams with different wave bands;
the radiation intensity adjusting assembly is arranged right in front of the plurality of groups of infrared light source assemblies;
the control assembly is used for controlling the infrared light source assembly and the radiation intensity adjusting assembly so as to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
Preferably, the infrared light source assembly includes: the device comprises an infrared light source, a sealing cover body, a collimation unit and a filtering unit;
the infrared light source is positioned in the sealing cover body and is aligned to the focus of the collimation unit;
emergent light of the infrared light source penetrates through the sealing cover body and then is provided to the collimation unit;
the collimating unit provides collimated emergent light to the filtering unit;
the light filtering unit filters the collimated emergent light to obtain a first infrared beam or a second infrared beam with a corresponding waveband;
the light filtering unit is a first light filter or a second light filter, the transmittance of the first light filter to the first infrared light beam is greater than that of the second infrared light beam, and the transmittance of the second light filter to the second infrared light beam is greater than that of the first infrared light beam.
Preferably, the method further comprises the following steps: and the image sensing assembly is arranged above the infrared light source assembly, and the optical axis of the image sensing assembly is parallel to the normal direction of the first infrared light beam or the second infrared light beam and is used for aligning to the detected infrared detection equipment.
Preferably, the radiation intensity adjusting assembly includes: a first blade group, a second blade group and a driving unit;
the driving unit is used for respectively controlling the first blade group and the second blade group to rotate so as to adjust the radiation intensity of the first infrared beam and the second infrared beam.
Preferably, the change of the rotation power of the first blade group and the second blade group is a trapezoidal curve.
Preferably, the control assembly adjusts the radiation intensity of the first infrared beam and/or the second infrared beam by adjusting the output power of the infrared light source assembly.
Preferably, the method further comprises the following steps: and the temperature adjusting unit is used for adjusting the temperature of the bicolor medium wave infrared radiation simulation source.
Preferably, the method further comprises the following steps: and the light beam converging unit converges the collimated emergent light so as to obtain a converging light spot on the surface of the detected infrared detection equipment.
According to another aspect of the invention, there is also provided a two-tone medium wave infrared radiation simulation system comprising a two-tone medium wave infrared radiation simulation source as defined in any one of the above.
According to another aspect of the present invention, there is also provided a bicolor medium wave infrared radiation simulation method, including:
controlling the output power of the infrared light source assembly to adjust the radiation intensity of the first infrared light beam and/or the second infrared light beam;
and controlling the position of the radiation intensity adjustment assembly to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
Preferably, the method further comprises:
and converging the collimated emergent light, then obtaining a converging light spot on the surface of the detected infrared detection equipment, and obtaining the angle energy uniformity of the emergent light according to the position of the converging light spot.
According to the double-color medium wave infrared radiation simulation source, the infrared radiation characteristics of a typical target are simulated to the maximum extent by controlling the multiple groups of infrared light source components to carry out rough adjustment on the radiation intensity, fine adjustment on the radiation intensity and selection of a radiation wave band through the radiation intensity adjusting components, so that the calibration precision and accuracy of an infrared imaging system can be greatly improved, and the accurate evaluation on the performance of a weapon system is ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an infrared light source module according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a bicolor medium wave infrared radiation analog source according to an embodiment of the present invention;
[ description of reference ]
10. An infrared light source assembly; 11. a first infrared light source assembly; 12. a second infrared light source assembly; 21. a first radiation intensity adjusting assembly; 22. a second radiation intensity adjusting assembly; 101. an infrared light source; 102. a collimating unit; 103. a light filtering unit; 20. a radiation intensity adjusting assembly; 40. an image sensing assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a bicolor medium wave infrared radiation analog source, which comprises:
the infrared light source components are used for providing first infrared light beams or second infrared light beams with different wave bands;
the radiation intensity adjusting assembly is arranged right in front of the plurality of groups of infrared light source assemblies;
the control assembly is used for controlling the infrared light source assembly and the radiation intensity adjusting assembly so as to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
According to the double-color medium wave infrared radiation simulation source disclosed by the embodiment of the invention, the infrared radiation characteristics of a typical target are simulated to the maximum extent by controlling the multiple groups of infrared light source components to carry out rough adjustment on the radiation intensity, fine adjustment on the radiation intensity and selection on the radiation wave band through the radiation intensity adjusting components, so that the calibration precision and accuracy of an infrared imaging system can be greatly improved, and the accurate evaluation on the performance of a weapon system is ensured.
In a particular embodiment, the first infrared light beam has a wavelength in a first wavelength band and the second infrared light beam has a wavelength in a second wavelength band, the first wavelength band being different from the second wavelength band. Therefore, in the embodiment of the invention, the output of the infrared beams of two different wave bands is realized, and the maximum radiation intensity formed by the infrared beams in each wave band is not less than 1000W/sr, so that the simulated radiation temperature can reach more than 1000K according to the blackbody Planck's law. The number of the infrared light source assemblies is selected according to the required maximum radiation intensity of the infrared light beams, and the maximum radiation intensity is the sum of the radiation intensities of all the first infrared light beams in the first waveband or the sum of the radiation intensities of all the second infrared light beams in the second waveband.
Preferably, in an embodiment of the present invention, in order to achieve the required maximum radiation intensity, the analog source includes a plurality of sets of infrared light source assemblies, and the plurality of sets of infrared light source assemblies are arranged in a certain rule to achieve an optimal radiation state. Specifically, a plurality of groups of infrared light source assemblies providing first infrared beams are arranged in a matrix or linear mode to form an infrared light source assembly set, a plurality of groups of infrared light source assemblies providing second infrared beams are also arranged in a matrix or linear mode to form an infrared light source assembly set, and two groups of infrared light source assembly sets are arranged in parallel or up and down in a combined mode according to the size of an outer frame of a supporting structure and the actual number of each group of infrared light source assemblies to optimize space utilization rate and achieve the optimal radiation state. The support structure is a structure for accommodating the infrared light source assembly.
In a preferred embodiment, as shown in fig. 1, the plurality of sets of infrared light source assemblies are divided into a first infrared light source assembly 11 and a second infrared light source assembly 12 according to different bands of the provided infrared light beams, the first infrared light source assembly 11 provides a first infrared light beam, the second infrared light source assembly 12 provides a second infrared light beam, and the first infrared light source assembly 11 and the second infrared light source assembly 12 may jointly form an approximately square structure of 3 × 3 and be disposed inside the outer frame. Wherein, the first radiation intensity adjusting assembly 21 is located in front of the plurality of groups of first infrared light source assemblies 11 to adjust the radiation intensity of the first infrared light beams, and the second radiation intensity adjusting assembly 22 is located in front of the plurality of groups of second infrared light source assemblies 12 to adjust the radiation intensity of the second infrared light beams.
Specifically, the arrangement mode of the combination of the first infrared light source assembly 11 and the second infrared light source assembly 12 is related to the size of an outer frame of the bicolor medium-wave infrared radiation analog source, so as to accommodate all the infrared light source assemblies in the outer frame; preferably, the outer frame has a length and width of 350mm + 350mm, and covers a circular area with a diameter of phi 350mm + 30mm, so as to form a circular light spot at infinity.
The radiation intensity resolution varies according to the radiation intensity. Wherein the radiation intensity resolution is of a minimum infrared radiation intensity controllable by the radiation intensity adjustment component. When the radiation intensity is 0-150W/Sr, the radiation intensity resolution is less than or equal to 0.3W/Sr; when the radiation intensity is 150-1000W/Sr, the radiation intensity resolution is less than or equal to 1.5W/Sr.
The control component can control the infrared light source component to roughly adjust the radiation intensity of the first infrared beam and/or the second infrared beam on the one hand, and can also control the radiation intensity adjusting component to finely adjust the radiation intensity of the first infrared beam and/or the second infrared beam on the other hand. In a preferred embodiment of the present invention, the control component adjusts the radiation intensity of the first infrared beam and/or the second infrared beam by adjusting the output power of the infrared light source component.
Further, the control assembly includes: the high-precision radiation intensity adjusting assembly closed-loop control module is used for controlling the radiation intensity adjusting assembly to adjust the radiation intensity of the first infrared beam and/or the second infrared beam, and the infrared light source assembly power supply and power adjusting module is used for supplying power to the infrared light source assembly and adjusting the output power of the infrared light source assembly and the computer module. The control assembly is constructed on the basis of a computer module and is responsible for the whole working mode and working process, and the output power of the infrared light source assembly can be set through control software installed in the control assembly, so that the rough adjustment of the radiation intensity of the infrared light source assembly is realized; on the basis, the radiation intensity adjusting component is fitted to a smooth angle curve according to any group of radiation intensity data, so that the radiation intensity adjusting component can be rapidly, accurately and continuously adjusted through the space duty ratio.
In the analog source for bicolor medium wave infrared radiation according to the embodiment of the present invention, preferably, as shown in fig. 2, the infrared light source assembly 10 includes: an infrared light source 101, a sealing cover (not shown), a collimating unit 102 and a filtering unit 103;
the infrared light source 101 is positioned in the sealed housing and aligned with the focus of the collimation unit 102; the infrared light source adopts a high-power halogen tungsten lamp, the working voltage of the high-power halogen tungsten lamp is 0-24V, and the cross section of the high-power halogen tungsten lamp is approximately a rectangle of 4.5mm multiplied by 10 mm; the sealing cover body is an infrared sealing cover, the outline shape of the infrared sealing cover body is approximately a cylindrical structure with the diameter of 22mm and the length of 25mm, the infrared light source 101 is contained in the cylindrical sealing cover body, and emergent light of the infrared light source 101 reaches the collimation unit 102 from the top surface or the bottom surface of the sealing cover body.
The collimating unit 102 is a paraboloid bowl-shaped structure made of an aspheric reflector, and the collimating unit 102 collects and reflects energy of a hemispherical space of an infrared light source, that is, radiates a punctiform infrared light source in a spherical space, so that all infrared radiation is emitted from an outlet of the collimating unit. The optical design software ZEMAX is used for carrying out ray chasing analysis, the actual ray tracing condition of the collimation unit with the focal length of 30mm, the height of 38mm, the outer diameter of 140mm and the central hole diameter of 40mm is approximately consistent with the radiation field of view of 2.1 degrees multiplied by 2.1 degrees, and the radiation field of view can reach 2 degrees multiplied by 2 degrees through fine adjustment of the position between the infrared light source and the collimation unit. The emergent light of the infrared light source 101 is provided to the collimating unit 102 after passing through the sealed cover body; the collimating unit 102 collects and utilizes the emergent light emitted forward by the infrared light source to the maximum extent, so that the light energy utilization rate of the system can be effectively improved and can reach about 90%.
The collimating unit 102 provides the collimated emergent light to the filtering unit 103;
the filtering unit 103 filters the collimated emergent light to obtain a first infrared beam or a second infrared beam with a corresponding waveband;
the light filtering unit is specifically a first light filter or a second light filter, the transmittance of the first light filter to the first infrared light beam is greater than that of the second infrared light beam, and the transmittance of the second light filter to the second infrared light beam is greater than that of the first infrared light beam. In other words, a first infrared light beam in a first wavelength band can be acquired after being filtered by the first optical filter, and a second infrared light beam in a second wavelength band can be acquired after being filtered by the second optical filter, so that infrared light beams in different wavelength bands can be selectively output through different optical filters.
In a specific embodiment of the present invention, specifically to the present embodiment, the first band having a wavelength of 3.7 μm to 4.2 μm and the second band having a wavelength of 4.4 μm to 4.8 μm are selected from the intermediate band of 3 μm to 5 μm. Namely, the first optical filter can ensure that the first infrared beam positioned in the first waveband from 3.7 mu m to 4.2 mu m can penetrate through the first optical filter, and the second infrared beam positioned in the second waveband from 4.4 mu m to 4.8 mu m can not penetrate through the first optical filter; the second optical filter can ensure that the second infrared beam with the wavelength of 4.4-4.8 μm in the second waveband can pass through, and the first infrared beam with the wavelength of 3.7-4.2 μm in the first waveband can not pass through the second optical filter, namely, the radiation fluxes of the collimated emergent light in different wavebands are selectively output through different band-pass optical filters.
In a preferred embodiment, the radiation intensity of a first infrared beam transmitted through the first filter in the plurality of groups of infrared light sources in a first wave band from 3.7 microns to 4.2 microns is not less than 1000W/sr, and the radiation intensity in a second wave band from 4.4 microns to 4.8 microns is not more than 10W/sr; the radiation intensity of the second infrared beam passing through the second filter in the multiple groups of infrared light sources in the second waveband from 4.4 μm to 4.8 μm is not less than 1000W/sr, the radiation intensity in the first waveband from 3.7 μm to 4.2 μm is not more than 10W/sr, and the number of the groups of infrared light sources is determined according to the requirement and is not limited by the embodiment of the invention.
In the preferred embodiment, since the mounting holes of the infrared light sources are reduced in the overall energy transmission efficiency, the emission intensity of the light emitted from one infrared light source is 514.8W/sr in the 3.7-4.2 μm band and 320.32W/sr in the 4.4-4.8 μm band, calculated according to the transmission efficiency of 0.90. Therefore, in the embodiment of the invention, 6 second optical filters are designed to be arranged in a 2 x 3 mode, so that the radiation intensity of the second infrared beam in a wave band of 4.4-4.8 μm is not less than 1000W/sr; 3 first filters are designed to be arranged in a mode of 1 x 3, and the radiation intensity of the first infrared beams in the first wave band from 3.7 mu m to 4.2 mu m is not less than 1000W/sr. Therefore, 9 infrared light source components are arranged in 3 rows by 3 columns in whole.
In a preferred embodiment, the diameters of the first optical filter and the second optical filter are 140mm, and are consistent with the outer diameter of the collimating unit, and the first optical filter and the second optical filter are respectively installed at 10mm positions outside the outlet of the collimating unit, so that the reliability and the service life of the collimating unit are not affected by overhigh temperature caused by infrared radiation with higher power. In the two selected band-pass filters, the transmittance of the first filter in a first waveband of 3.7-4.2 microns is greater than 0.90, the transmittance in a second waveband of 4.4-4.8 microns is less than 0.002, and the transmittances of the second filter in the two wavebands are opposite, namely the transmittance of the second filter in the second waveband of 4.4-4.8 microns is greater than 0.90, and the transmittance in the first waveband of 3.7-4.2 microns is less than 0.002.
In a preferred embodiment of the present invention, the radiation temperature of the medium wave infrared source (3 μm to 5 μm) after passing through the sealed housing is about 1260 ℃, since the infrared radiation generated by the infrared source is based on planck's radiation law, that is, if the radiation temperature T of the medium wave infrared radiation source is 1533K, the spectral radiation emittance is:
in the formula: c. C1First radiation constant: 3.7418X 10-16 (W.m 2); c. C2Second radiation constant: 1.4388X 10-2 (m.K); λ is the wavelength and ε (λ, T) is the spectral emissivity of the infrared source.
The light source is thus at wavelength λ1～λ2The radiation exitance within the band is:
since the infrared light source is approximately lambertian, the integrated radiance L of the infrared light source band can be expressed as:
L＝M/π (1-3)
the relationship between the radiant flux P of the infrared light source and the integral radiance L of the infrared light source wave band is as follows:
in the formula: eta is the reflectivity of the collimation unit and is 0.95;
α1selecting pi/2 as the field angle of the infrared light source to the collimation unit;
s is the effective area of the infrared light source passing through the collimation unit, and the radius is 0.225 cm.
The relationship between the radiation intensity I of the infrared light source after passing through the collimation unit and the radiation flux P of the infrared light source is as follows:
in the formula:
omega is the spatial solid angle of the radiation field of view of the infrared light source after passing through the collimation unit: 4 pi sin2(1.05°/2)。
The formula (1-5) is substituted by the formula (1-1), (1-2), (1-3) and (1-4), and the radiation intensity I of the infrared light source after passing through the collimation unit can be obtained:
in the formula:
and r is the effective radius of the infrared light source corresponding to the collimation unit.
A bicolor medium wave infrared radiation analog source according to a preferred embodiment of the present invention, as shown in fig. 2, further includes: and the image sensing assembly 40 is arranged above the infrared light source assembly, and the optical axis of the image sensing assembly is parallel to the normal direction of the first infrared light beam or the second infrared light beam so as to align the image sensing assembly to the detected infrared detection equipment. Specifically, the image sensing assembly is a visible light CCD camera, the focal length of a lens selected at the front end of the visible light CCD camera is 50mm, the minimum working distance is 240mm, and the F number is 4-18.
In a preferred embodiment of the present invention, the radiation intensity adjusting assembly 50 includes: a first blade group, a second blade group and a driving unit;
the driving unit is used for respectively controlling the first blade group and the second blade group to rotate so as to adjust the radiation intensity of the first infrared beam and the second infrared beam, and therefore continuous fine adjustment of the radiation intensity is achieved.
Specifically, the first blade group and the second blade group are arranged in the left-right direction, the size of the first blade group corresponds to the first infrared beam exit size of the first band from 3.7 μm to 4.2 μm, and the size of the second blade group corresponds to the second infrared beam exit size of the second band from 4.4 μm to 4.8 μm, and in the embodiment of the present invention, the sizes are 420mm × 140mm and 420mm × 280mm, respectively.
Preferably, the first set of blades and the second set of blades may be in the form of a combination of louvres or in the form of other types of louvres. The adjustment of the radiation intensity of the first infrared beam is effected in the following by way of example with a first set of blades in the form of louvers. The control assembly may control the first set of vanes to oscillate continuously according to its typical profile to achieve fine tuning of the radiant energy. Specifically, the first blade group is composed of 10 louver blades with the same size and a movement mechanism. The shutter blades are made of aluminum alloy materials, can resist the high temperature of 200 ℃, are arranged at the position right in front of the infrared light source assembly, and are consistent with the size of the outlet end of the collimation unit in overall size. The movement mechanism comprises a rotating shaft positioned on each shutter blade and connecting rods on two sides of the rotating shaft, the driving unit drives the rotating shaft on any one shutter blade to rotate so as to drive the connecting rods on two sides of the shutter blade to move, and then the rotating shafts on other shutter blades connected with the connecting rods are driven to rotate, so that the effect of linkage of all the shutter blades is realized, and the rotating angle can be adjusted at will. Preferably, the driving mechanism is a servo motor, the rated rotating speed is 3000r/m, the highest rotating speed is 5000r/m, the starting rotating speed is 1500r/m, 20000 pulses rotate 360 degrees, namely one pulse rotates 0.018 degrees, so that 0.018 degrees is the minimum angle which can be moved by the servo motor, and the normal included angle between the louver blades and the first infrared light beam output by the infrared light source component is theta. The rate of change of the radiation intensity resolution | (1-sin θ)' | cos θ decreases with increasing θ during the shutter blades from fully open to fully closed (i.e., θ changes from 0 ° to 90 °).
The radiation intensity resolution is the maximum when the radiation intensity is 150-1000W/Sr, theta is changed from 58.21 DEG to 0 DEG, and the radiation intensity resolution is 1000W/Sr x (sin 0.018-sin 0 DEG) to 0.314W/Sr when theta is 0 DEG;
when the radiation intensity is 0-150W/Sr, the radiation intensity resolution is the maximum when theta is 58.21 DEG in the process of changing theta from 90 DEG to 58.21 DEG, and is 1000W/Sr x (sin 58.21-sin (58.21 DEG +0.018 DEG) × 0.165W/Sr.
Wherein, when theta is 58.21 degrees, the corresponding radiation intensity is 100W/sr; when θ is 0 °, the corresponding radiation intensity is 1000W/sr.
In the bicolor medium wave infrared radiation simulation source according to the preferred embodiment of the present invention, the change of the rotation power of the first blade group and the second blade group is a trapezoidal curve. Specifically, in the process that the driving unit drives the first blade group and the second blade group to rotate, the first blade group and the second blade group are accelerated to a first speed within a first time, then move at a constant speed at the first speed within a second time, and then are decelerated from the first speed to 0 within a third time and stop, wherein the first time and the third time are extremely short, and the total length of the first time, the second time and the third time is less than or equal to 15 ms. Therefore, the change of the rotating power of the first blade group and the second blade group is in a trapezoidal curve when viewed from the time change curve. The slopes of the two sides of the trapezoidal curve are related to the lengths of the first time and the third time.
The bicolor medium wave infrared radiation analog source of the preferred embodiment of the invention further comprises: and the temperature adjusting unit is used for adjusting the temperature of the bicolor medium wave infrared radiation simulation source. Specifically, the temperature regulation unit is a fan, and 4 fans are installed at the rear part of the simulation source, so that the temperature regulation can be performed on the infrared light source component by using a high-power working time collimation unit, a filtering unit, a supporting structure and the like, and the influence on the use caused by overhigh temperature of the bicolor medium-wave infrared radiation simulation source is avoided.
The bicolor medium wave infrared radiation analog source of the preferred embodiment of the invention further comprises: and the light beam converging unit converges the collimated emergent light so as to obtain a converging light spot on the surface of the detected infrared detection equipment. In order to ensure that more than 85% of the spatial radiation of the infrared light source in the infrared light source component is converged in a 2-degree x 2-degree field of view, theoretical simulation needs to be carried out on the collimation unit. Specifically, adopt surveyed infrared detection equipment to place on the focal plane of light beam convergence unit, the distance between the two does the focus of light beam convergence unit to the emergent light after will collimating assembles the back and obtains assembling the facula on surveyed infrared detection equipment's surface. And the energy distribution uniformity of the collimation unit is proved by the capability of the detected infrared detection equipment for detecting a certain position of the convergent light spot and the central capability. In the embodiment of the invention, the light beam converging unit is a converging lens with a focal length of 85mm, when emergent light of a single infrared light source passes through the collimating unit, the emergent light is collected through the converging lens to obtain a converging light spot on the surface of detected infrared detection equipment, the image surface size corresponding to the position of the detection equipment 1 DEG away from a central light spot is 1.5mm, the side length of the selected detector surface is 150mm, the energy of the central position of the light spot and the position of +/-1.5 mm on the surface of the detection equipment is analyzed, and the angle energy uniformity is calculated by using the following formula.
Wherein E is the energy of the light spot, Emax、EminRespectively refers to the maximum energy and the minimum energy value in the central light spot and the position with the distance of +/-1.5 mm,
refers to the average energy value.
After calculation, the angle energy uniformity of a single infrared light source passing through the collimation unit is 88.3%, and the collimation unit is proved to be capable of ensuring that more than 85% of infrared light beams can be converged in a 2-degree multiplied by 2-degree field of view.
The embodiment of the invention also provides a bicolor medium wave infrared radiation simulation system which comprises the bicolor medium wave infrared radiation simulation source in any one of the specific embodiments.
The embodiment of the invention also provides a bicolor medium wave infrared radiation simulation method, which comprises the following steps:
controlling the output power of the infrared light source assembly to adjust the radiation intensity of the first infrared light beam and/or the second infrared light beam;
and controlling the position of the radiation intensity adjustment assembly to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
The bicolor medium wave infrared radiation simulation method provided by the embodiment of the invention preferably further comprises the following steps:
and converging the collimated emergent light, then obtaining a converging light spot on the surface of the detected infrared detection equipment, and obtaining the angle energy uniformity of the emergent light according to the position of the converging light spot.
According to the double-color medium wave infrared radiation simulation source disclosed by the embodiment of the invention, the infrared radiation characteristics of a typical target are simulated to the maximum extent by controlling the multiple groups of infrared light source components to carry out rough adjustment on the radiation intensity, fine adjustment on the radiation intensity and selection on the radiation wave band through the radiation intensity adjusting components, so that the calibration precision and accuracy of an infrared imaging system can be greatly improved, and the accurate evaluation on the performance of a weapon system is ensured.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should also be understood that, in the embodiment of the present invention, the term "and/or" is only one kind of association relation describing an associated object, and means that three kinds of relations may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A two-color medium wave infrared radiation analog source comprising:
the infrared light source components are used for providing first infrared light beams or second infrared light beams with different wave bands;
the radiation intensity adjusting assembly is arranged right in front of the plurality of groups of infrared light source assemblies;
the control assembly is used for controlling the infrared light source assembly and the radiation intensity adjusting assembly so as to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
2. The dual-color medium wave infrared radiation analog source of claim 1, wherein the infrared light source assembly comprises: the device comprises an infrared light source, a sealing cover body, a collimation unit and a filtering unit;
the infrared light source is positioned in the sealing cover body and is aligned to the focus of the collimation unit;
emergent light of the infrared light source penetrates through the sealing cover body and then is provided to the collimation unit;
the collimating unit provides collimated emergent light to the filtering unit;
the light filtering unit filters the collimated emergent light to obtain a first infrared beam or a second infrared beam with a corresponding waveband;
the light filtering unit is a first light filter or a second light filter, the transmittance of the first light filter to the first infrared light beam is greater than that of the second infrared light beam, and the transmittance of the second light filter to the second infrared light beam is greater than that of the first infrared light beam.
3. The analog source of dichromatic medium wave infrared radiation of claim 1, further comprising: and the image sensing assembly is arranged above the infrared light source assembly, and the optical axis of the image sensing assembly is parallel to the normal direction of the first infrared light beam or the second infrared light beam and is used for aligning to the detected infrared detection equipment.
4. The analog source of dichromatic medium wave infrared radiation of claim 1, wherein the radiation intensity adjustment assembly comprises: a first blade group, a second blade group and a driving unit;
the driving unit is used for respectively controlling the first blade group and the second blade group to rotate so as to adjust the radiation intensity of the first infrared beam and the second infrared beam.
5. The analog source of dichromatic medium wave infrared radiation according to claim 4, wherein the variation of the rotational power of the first and second blade sets is in the form of a trapezoidal curve.
6. The dual-color medium wave infrared radiation analog source of claim 1, wherein the control assembly adjusts the radiation intensity of the first infrared beam and/or the second infrared beam by adjusting the output power of the infrared light source assembly.
7. The analog source of dichromatic medium wave infrared radiation of claim 2, further comprising: and the light beam converging unit converges the collimated emergent light so as to obtain a converging light spot on the surface of the detected infrared detection equipment.
8. A two-color medium wave infrared radiation simulation system, comprising a two-color medium wave infrared radiation simulation source according to any of claims 1 to 7.
9. A bicolor medium wave infrared radiation simulation method is characterized by comprising the following steps:
controlling the output power of the infrared light source assembly to adjust the radiation intensity of the first infrared light beam and/or the second infrared light beam;
and controlling the position of the radiation intensity adjustment assembly to adjust the radiation intensity of the first infrared beam and/or the second infrared beam.
10. The bi-color medium wave infrared radiation simulation method of claim 9, further comprising:
and converging the collimated emergent light, then obtaining a converging light spot on the surface of the detected infrared detection equipment, and obtaining the angle energy uniformity of the emergent light according to the position of the converging light spot.
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