Multi-element photoelectric target and scene analogue simulation test system

Abstract

The utility model discloses a multi-element photoelectric target and scene analogue simulation test system, which comprises a target and scene simulator, a laser distance simulator, a laser echo simulator, a multiband beam combining device, a flying platform motion simulation device and a main control computer, the main control computer is connected with the flight platform motion simulation device, the target and scene simulator, the laser distance simulator, the laser echo simulator and the multiband beam combining device, and respectively sends a control motion instruction to the flight platform motion simulation device and sends a scene image to the target and scene simulator; a control instruction is sent to the laser distance simulator and the laser echo simulator, and the target and scene simulator projects an emitted television / infrared light signal to a tested device through the multi-band beam combining device; the laser distance simulator and the laser echo simulator transmit and receive laser signals with a tested device through the multi-band beam combining device. The device has high flexibility and repeatability, and military resources are saved.

Description

Technical Field

[0001] The utility model relates to the field of equipment target and scene simulation such as airborne photoelectric detection systems, seekers, photoelectric pods, etc., and particularly to a multi-element photoelectric target and scene excitation device. Background Art

[0002] In modern military, aircraft are the core equipment for transportation, reconnaissance, confrontation, etc. in the battlefield. Airborne optoelectronic detection and confrontation systems use infrared detection and laser tracking technology to scan, detect, track, attack and destroy targets. In the field of airborne detection, optoelectronic detection equipment has developed rapidly. At present, it is fully deployed on fourth-generation aircraft, fifth-generation aircraft and future models. As the "eyes" for discovering air, ground and sea targets, optoelectronic detection systems play a vital role in combat. At present, there are two main ways to obtain infrared scene images of aircraft targets: one is field flight test, using airborne infrared detection system to measure real infrared image data; the other is to use computer simulation method. Field flight test can obtain accurate scene data, but it not only consumes huge manpower and financial resources, but also is limited by the test battlefield environment and weather conditions. It is difficult to obtain infrared images of scenes under various complex conditions and environments. Infrared images in many military applications and scenes are almost impossible to obtain. In these issues, computer simulation modeling technology is more convenient and effective. Establishing a virtual infrared and laser battlefield environment can not only efficiently and realistically simulate infrared scene images of targets and backgrounds under various environments and complex interference conditions, but also serve as an experimental basis for algorithm design and system evaluation.

[0003] The existing simulation technologies are mainly as follows:

[0004] (I) Resistive array infrared scene generation technology

[0005] For example, a dual-channel infrared scene simulator device disclosed in Chinese invention patent application publication number CN110376732A uses a black body to generate a radiation light source, generates an infrared scene through a resistor array component, and projects it to the exit pupil through a telescope group.

[0006] The resistor array assembly is made by micromachining technology. Each resistor in the resistor array assembly is controlled by an independent current source. The current on each resistor is precisely controlled by a computer. According to Joule's law, different currents on resistors will generate different amounts of heat, and each resistor can be heated to a different temperature. According to the Stefan-Boltzmann law, resistors with different temperatures generate different infrared radiation. The infrared radiation radiated by the entire resistor array forms a two-dimensional infrared image. The continuous change of the resistor temperature generates a dynamic infrared image. However, when the resistor temperature is high, the thermal crosstalk between the resistors will obviously cause the temperature of the resistor matrix to be out of control, thereby affecting the image generation effect.

[0007] According to the Stefan-Boltzmann law, the resistor array can only produce scenes in the infrared band, which has great limitations.

[0008] (2) Infrared CRT

[0009] In the 1980s, research on infrared scene simulators based on infrared cathode ray tubes (IRCRTs) began. Infrared CRTs are developed from visible light CRTs, with the glass fluorescent screen replaced by a stainless steel cold screen coated with infrared fluorescent material. The working principle of infrared CRTs is the same as that of visible light CRTs, both of which generate dynamic infrared images by scanning the fluorescent screen with a cathode ray tube and controlling the input video signal. The advantages of infrared CRT-type infrared scene simulators are simple structure and high grayscale level of infrared images. The disadvantages are low frame rate, large target screen cooling equipment, low radiation intensity, and difficult to solve the electron beam crosstalk problem. They have been gradually replaced by other types of scene generation devices. Summary of the invention

[0010] In view of the fact that the existing technology is insufficient in evaluating the comprehensive combat effectiveness of optoelectronic equipment, it is necessary to provide a multi-electrooptical target and scene simulation test system to solve the above problems.

[0011] The utility model discloses a multi-element photoelectric target and scene simulation test system, comprising a target and scene simulator, a laser distance simulator, a laser echo simulator, a multi-band beam combining device, a flight platform motion simulation device, and a main control computer; the main control computer is connected with the flight platform motion simulation device, the target and scene simulator, the laser distance simulator, the laser echo simulator, and the multi-band beam combining device, and sends a control motion instruction to the flight platform motion simulation device, sends a scene image to the target and scene simulator, and sends a control instruction to the laser distance simulator and the laser echo simulator; the target and scene simulator projects an emitted television / infrared light signal to a device under test through the multi-band beam combining device; the laser distance simulator and the laser echo simulator realize the transmission and reception of laser signals with the device under test through the multi-band beam combining device.

[0012] In a preferred embodiment of the utility model, the target and scene simulator includes a first signal processing module, a driving circuit, a composite light source assembly, a beam splitter, a television micromirror assembly, an infrared micromirror assembly, and a beam combiner; the first signal processing module receives the image information output by the main control computer, controls the deflection of the television micromirror assembly and the infrared micromirror assembly through the driving circuit to realize optical switching, the composite light source assembly realizes multi-dimensional light path beam splitting through the beam splitter, the light beam vertically enters the television micromirror assembly and the infrared DMD micromirror assembly, and then is coupled by the beam combiner to output multi-dimensional optoelectronic targets and scenes.

[0013] In a preferred embodiment of the utility model, the first signal processing module includes a signal processing circuit, a frame frequency synchronization circuit, an image decoding circuit and a pulse width modulation circuit, wherein the signal processing circuit receives the image information output by the main control computer, and transmits it to the driving circuit after being frequency synchronized, decoded and modulated in parallel by the frame frequency synchronization circuit, the image decoding circuit and the pulse width modulation circuit; the image decoding circuit collects the input image signal and converts it into a digital storable signal for subsequent circuit processing; the frame frequency synchronization circuit synchronizes the frequency of the photodetector with the TV micromirror assembly and the infrared micromirror assembly, so as to realize stable image transmission between the infrared detection system and the TV micromirror assembly and the infrared micromirror assembly; that is, the image information is refreshed at a high speed according to the frequency and phase of the input frame synchronization pulse, the input image signal frame frequency and the synchronization signal frequency are exactly the same, and this frequency can vary within the range of 10Hz to 100Hz; the pulse width modulation circuit selects a row of the pixel array of the TV micromirror assembly and the infrared micromirror assembly for refreshing, and the pixel array of the TV micromirror assembly and the infrared micromirror assembly completes the refreshing of the entire array in a row-by-row manner, and the micromirror array will be refreshed many times within the time of one frame of image, and the grayscale image is displayed through the light integration effect of the infrared detection system.

[0014] In a preferred embodiment of the present invention, the composite light source assembly includes a composite light source and an illumination optical system.

[0015] In a preferred embodiment of the utility model, the composite light source is a low-temperature cavity black body; the illumination optical system is a collimating optical system composed of a meniscus lens and two biconvex lenses, and the meniscus lens is located between the two biconvex lenses.

[0016] In a preferred embodiment of the present invention, the beam splitter is subjected to a coating process.

[0017] In a preferred embodiment of the utility model, the television micromirror assembly includes a visible DMD micromirror and a visible TIR prism; the infrared micromirror assembly also includes an infrared DMD micromirror and an infrared TIR prism; the surface of the infrared DMD micromirror is coated with an infrared reflective film; the visible TIR and infrared TIR prisms are both formed by gluing two prisms together; the visible TIR prism is placed between the beam splitter and the visible DMD micromirror, and the infrared TIR prism is placed between the beam splitter and the infrared DMD micromirror.

[0018] In a preferred embodiment of the utility model, the laser distance simulator includes a time delay module and a laser echo module, and the external laser obtains laser pulse width information through the time delay module and outputs it to the main control computer; the time delay module triggers the laser echo module to drive and start timing, and the laser echo module is connected to the main control computer, receives the laser echo parameter setting instruction from the main control computer, and outputs the echo signal.

[0019] In a preferred embodiment of the utility model, the time delay module includes a first adjustable attenuation component, a first photodetector, a pulse measurement circuit and a delay circuit. The external laser is converged onto the target surface of the first photodetector through the first adjustable attenuation component. The pulse width measurement circuit is connected to the first adjustable attenuation component to obtain the laser pulse width information converged on the target surface of the first photodetector, and outputs it to the main control computer; the delay circuit triggers the laser echo module to start timing.

[0020] In a preferred embodiment of the utility model, the laser echo module includes a laser collimator, a first laser, an infrared indicator, a semi-transparent and semi-reflective mirror and a reflector. The first laser and the infrared indicator are connected to the main control computer to receive a laser echo parameter setting instruction from the main control computer; the delay circuit is connected to the first laser to trigger the first laser to start timing, the first laser sends out a laser echo signal according to the laser echo parameter setting instruction of the main control computer, the laser echo signal is collimated by the laser collimator and then outputs the laser echo signal through the semi-transparent and semi-reflective mirror; the infrared indicator sends out an infrared signal according to the laser echo parameter setting instruction of the main control computer, after being reflected by the reflector, it is merged into the laser echo signal through the semi-transparent and semi-reflective mirror to assist in optical path alignment.

[0021] In a preferred embodiment of the present utility model, the laser echo simulator includes an irradiation light information detection module and a target echo emission module. The external laser obtains the coded information of the external laser through the irradiation light information detection module and outputs it to the main control computer for decoding; the main control computer outputs the echo instruction to the target echo emission module, and the target echo emission module outputs the echo laser after attenuation shaping.

[0022] In a preferred embodiment of the utility model, the illumination light information detection module includes a second adjustable attenuation component, a second photodetector and a second signal processing module. The external laser is converged to the target surface of the second photodetector through the second adjustable attenuation component, and the coded information of the external laser is obtained through analysis by the second signal processing module.

[0023] In a preferred embodiment of the utility model, the target echo emission module includes a second laser and a laser collimator attenuator. The second laser receives an echo output instruction from the main control computer, emits an echo laser, and outputs the echo laser after attenuation and shaping by the laser collimator attenuator.

[0024] In a preferred embodiment of the present invention, the laser collimation attenuator is a fiber collimation attenuator; the fiber collimation attenuator includes an electrically adjustable fiber attenuator and a fiber collimator.

[0025] In a preferred embodiment of the present invention, both the first laser and the second laser are fiber lasers.

[0026] In a preferred embodiment of the present invention, the first adjustable attenuation component and the second adjustable attenuation component both use paddle-type attenuation plates, and the attenuation plates have different transmittances.

[0027] In a preferred embodiment of the present invention, both the first photodetector and the second photodetector are silicon-based detectors.

[0028] In a preferred embodiment of the utility model, the multi-band beam combining device includes a folding reflector and a laser / scene beam combining mirror. The lasers emitted by the target and scene simulator are projected onto the folding reflector so that the optical path vertically cuts into the laser / scene beam combining mirror. Then, through reflection by the laser scene beam combining mirror, the multi-optical signals are output to the laser distance simulator and the laser echo simulator respectively through a common aperture.

[0029] In a preferred embodiment of the present invention, the folding reflector is a normal space vertical structure.

[0030] In a preferred embodiment of the present invention, a multi-spectral film system is coated on the surface of the laser / scene beam combining mirror.

[0031] In a preferred embodiment of the present utility model, the flight platform motion simulation device includes a moving component, a bearing component and a base, and the base supports the moving component through the bearing component to complete pitch and azimuth motion.

[0032] The above-mentioned multi-electro-optical target and scene simulation test system is a simulation system that integrates laser, television, infrared targets and scenes. The target and scene simulator is used to build a dynamic scene simulation environment covering the three bands of medium wave / long wave infrared and television; the laser distance simulator simulates the echo after the laser rangefinder measures the target at a specific distance according to the simulation needs; the laser echo simulator is used to simulate the echo spot of the laser illuminator; the multi-band beam combining device realizes the beam combining of the multi-electro-optical paths of the target and scene simulator, the laser distance simulator and the laser echo simulator; the flight platform motion simulation device is used to adjust the system azimuth and pitch, and simulate the dynamic excitation signal in the search, scanning, and tracking state. The above-mentioned multi-electro-optical target and scene simulation test system can generate optical characteristic simulation technical data of the target and background in the background optical scene through the control of the main control computer, can simulate infrared and television scene images of different background types and meteorological conditions on land, sea and air, can simulate the characteristics of the echo signal of the laser ranging and laser irradiation target, and realize the interaction of the common optical path. In the laboratory, the index evaluation, key parameter sensitivity analysis and operational process research of the optoelectronic detection system are carried out until the operational effectiveness of the optoelectronic detection equipment meets the system requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is a composition diagram of a multi-element photoelectric target and scene simulation test system of the utility model.

[0035] Figure 2 It is the target and scene simulator composition and principle diagram of the utility model.

[0036] Figure 3 The utility model is a laser distance simulator composition and principle diagram.

[0037] Figure 4 The utility model is a laser echo simulator composition and principle diagram.

[0038] Figure 5 It is the composition and principle diagram of the multi-band beam combining device of the utility model.

[0039] Figure 6 The utility model is a composition and principle diagram of a flight platform motion simulation device.

[0040] Figure 7It is an optical principle diagram of the lighting optical system of the utility model.

[0041] Figure 8 The utility model is a schematic diagram of the principle and composition of the television micromirror assembly.

[0042] Fig. 9 It is a schematic diagram of the principle and composition of the infrared micromirror component of the utility model.

[0043] Fig.10 It is a schematic diagram of the spatial structure of the folding reflector of the utility model. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, they are further described below in conjunction with the accompanying drawings and embodiments.

[0045] Please refer to Figure 1 A multi-element optoelectronic target and scene simulation test system shown in the figure includes a main control computer 1, a target and scene simulator 2, a laser distance simulator 3, a laser echo simulator 4, a multi-band beam combining device 5, and a flight platform motion simulation device 6; the main control computer is connected to the target and scene simulator 2, the laser distance simulator 3, the laser echo simulator 4, and the multi-band beam combining device 5; the target and scene simulator 2 projects the emitted TV / infrared light signal to the device under test through the multi-band beam combining device 5; the laser distance simulator 3 and the laser echo simulator 4 realize the transmission and reception of laser signals with the device under test through the multi-band beam combining device 5.

[0046] Please refer to Figure 2 The target and scene simulator 2 includes a signal processing module 21 (the aforementioned first signal processing module), a driving circuit 22, a composite light source assembly 23, a spectroscope 24, a TV micromirror assembly 25, an infrared micromirror assembly 26, and a beam combiner 27; the signal processing module 21 receives the image information output by the main control computer, controls the deflection of the TV micromirror assembly 251 and the infrared micromirror assembly 261 through the driving circuit 22 to realize the optical switch, and the composite light source assembly 23 realizes multivariate light path splitting through the spectroscope 24, and the light beam vertically enters the TIR prism 252 and the TIR prism 262, and then is coupled and output by the beam combiner 27 to produce multivariate optical targets and scenes.

[0047] The signal processing module 21 also includes an image decoding circuit 212, a frame frequency synchronization circuit 211 and a pulse width modulation circuit 213; the image decoding circuit 212 collects the input image signal and converts it into a digital storable signal for subsequent circuit processing; the frame frequency synchronization circuit 211 synchronizes the frequency of the photodetector with the TV micromirror assembly 251 and the infrared micromirror assembly 261, and realizes stable image transmission between the infrared detection system and the TV micromirror assembly 251 and the infrared micromirror assembly 261; that is, the image information is refreshed at a high speed according to the frequency and phase of the input frame synchronization pulse. The input image signal frame frequency and the synchronization signal frequency are exactly the same, and this frequency can vary within the range of 10Hz to 100Hz. The pulse width modulation circuit 213 selects a row of the pixel array of the TV micromirror assembly 251 and the infrared micromirror assembly 261 for refreshing, and the pixel array of the TV micromirror assembly 251 and the infrared micromirror assembly 261 completes the refreshing of the entire array in a row-by-row order. The micromirror array will be refreshed many times within the time of a frame image, and the grayscale image is displayed through the light integration effect of the infrared detection system.

[0048] The composite light source assembly 23 also includes a composite light source 231 and an illumination optical system 232; the composite light source 231 is a low-temperature cavity black body; the illumination optical system 232 is a collimating optical system composed of a meniscus lens and a double convex lens; the composite light source 231 is incident on the illumination optical system 232 so that the light source uniformity is better than 95% within the field of view.

[0049] Please refer to Figure 7 The illumination optical system 232 includes a meniscus lens 2322 , convex lenses 2321 and 2323 , and the meniscus lens 2322 is located between the convex lens 2321 and the convex lens 2323 .

[0050] Please refer to Figure 8 The TV micromirror assembly 25 includes a visible DMD micromirror 251 and a visible TIR prism 252; the resolution of the visible DMD micromirror 251 is 1400×1024, and the reflection band is 450-950 nm; the visible TIR prism 252 is formed by gluing two prisms; the visible TIR prism 252 is placed between the beam splitter 24 and the visible DMD micromirror 251;

[0051] The structure of the TV micromirror assembly 25 is such that the incident light enters the visible TIR prism 252 vertically, is totally reflected on the inner inclined surface of the visible TIR prism 252, exits the visible TIR prism 252, is reflected by the visible DMD micromirror 251 array, and then enters the visible TIR prism 252. Since the air gap between the glued visible TIR prisms 252 is particularly small, the light can be viewed on a flat panel and is emitted vertically.

[0052] See also Fig. 9The infrared micromirror assembly 26 also includes an infrared DMD micromirror 261 and an infrared TIR prism 262; the surface of the infrared DMD micromirror 261 is coated with an infrared reflective film, which can reflect infrared light in the medium wave 2.7~5.4um and long wave 7~14um bands, with a resolution of 1024×768; the infrared TIR prism 262 is formed by gluing two prisms; the infrared TIR prism 262 is placed between the spectroscope 24 and the infrared DMD micromirror 261.

[0053] The structure of the infrared DMD micromirror assembly 26 is such that the incident light enters the infrared TIR prism 262 vertically, is totally reflected on the internal inclined surface of the infrared TIR prism 262, exits the infrared TIR prism 262, is reflected by the infrared DMD micromirror assembly 26 array, and then enters the infrared TIR prism 262. Since the air gap between the glued infrared TIR prisms 262 is particularly small, the light can be seen on the flat panel and is emitted vertically.

[0054] Please refer to Figure 3 The laser distance simulator 3 includes a time delay module 31 and a laser echo module 32; the external laser obtains the laser pulse width information through the time delay module 31 and outputs it to the main control computer 1; the time delay module 31 triggers the laser echo module 32 to drive and start timing, and the laser echo module 32 is connected to the main control computer 1, receives the laser echo parameter setting instruction from the main control computer 1 and outputs the echo signal, specifically:

[0055] The time delay module 31 includes an adjustable attenuation component 311 (the aforementioned first adjustable attenuation component), a photodetector 312 (the aforementioned first photodetector), a pulse measurement circuit 313 and a delay circuit 314. The external laser is converged onto the target surface of the photodetector 312 through the adjustable attenuation component 311. The pulse width measurement circuit 313 is connected to the adjustable attenuation component 311 to obtain the laser pulse width information converged onto the target surface of the photodetector 312, and outputs it to the main control computer 1.

[0056] The laser echo module 32 includes a laser collimator 322, a laser 321 (the aforementioned first laser), an infrared indicator 323, a semi-transparent and semi-reflective mirror 324 and a reflector 325. The laser 321 and the infrared indicator 323 are connected to the main control computer 1 to receive the laser echo parameter setting instruction from the main control computer 1; the delay circuit 314 is connected to the laser 321 to trigger the laser 321 to drive and start timing. The laser 321 sends out a laser echo signal according to the laser echo parameter setting instruction of the main control computer 1. The laser echo signal is collimated by the laser collimator 322 and then outputs the laser echo signal through the semi-transparent and semi-reflective mirror 324; the infrared indicator 323 sends out an infrared signal according to the laser echo parameter setting instruction of the main control computer 1, which is reflected by the reflector 325 and then merged into the laser echo signal through the semi-transparent and semi-reflective mirror 324 to assist in optical path alignment.

[0057] The laser 321 is a fiber laser; the adjustable attenuation component 311 uses a paddle-type attenuation plate with different transmittances. The photodetector 312 is a silicon-based detector with a detection wavelength range of 700 to 1700 nm, a central wavelength of 1064 nm, and a measurable pulse width range of 1 to 50 ns.

[0058] Please refer to Figure 4 The laser echo simulator 4 includes an irradiation light information detection module 41 and a target echo emission module 42. The external laser obtains the coded information of the external laser through the irradiation light information detection module 42 and outputs it to the main control computer 1 for decoding; the main control computer 1 outputs the echo instruction to the target echo emission module 42, and the target echo emission module 42 outputs the echo laser after attenuation shaping, as follows:

[0059] The irradiation light information detection module 42 includes a second adjustable attenuation component 411 (the aforementioned second adjustable attenuation component), a photodetector 412 (the aforementioned second photodetector) and a signal processing module 413 (the aforementioned second signal processing module). The external laser is converged onto the target surface of the photodetector 412 through the adjustable attenuation component 411, and the signal processing module 413 analyzes and obtains the coded information of the external laser.

[0060] The target echo transmitting module 42 includes a laser 421 (the aforementioned second laser) and a laser collimator attenuator 422. The laser 421 receives an echo output instruction from the main control computer 1, emits an echo laser, and outputs the echo laser after being attenuated and shaped by the laser collimator attenuator 422.

[0061] The laser collimation attenuator 422 is a fiber collimation attenuator; the fiber collimation attenuator includes an electrically adjustable fiber attenuator and a fiber collimator. The laser 421 is a fiber laser. The adjustable attenuation component 411 uses a paddle-type attenuation plate, and the attenuation plate has different transmittances. The photodetector 412 is a silicon-based detector with a detection wavelength range of 700 to 1700 nm, a central wavelength of 1064 nm, and a measurable pulse width range of 1 to 50 ns.

[0062] Please refer to Figure 5 The multi-band beam combining device 5 includes a folding reflector 51 and a laser / scene beam combining mirror 52. The laser emitted by the target and scene simulator 2 is projected onto the folding reflector 52 so that the optical path vertically cuts into the laser / scene beam combining mirror 51, and then is reflected by the laser scene beam combining mirror 51 to realize the common aperture of the multi-element optical signal and output to the laser distance simulator 3 and the laser echo simulator 4 respectively.

[0063] The folding reflector 51 is a vertical structure in the normal space. The folding reflector 51 is a vertical structure in the normal space. Please refer to Fig.10The vertical structure of the normal space is that the incident light forms a vertical structure relationship with the incident light in space after the incident light passes through the folding reflector 51. The surface of the laser / scene beam combiner 52 is coated with an infrared anti-reflection film and a laser reflective film.

[0064] Please refer to Figure 6 The flight platform motion simulation device 6 includes a moving component 62, a bearing component 63 and a base 61, and the base 61 supports the moving component 62 through the bearing component 63 to complete the pitch and azimuth motion;

[0065] The above-mentioned multi-electro-optical target and scene simulation test system can simulate in real time the dynamic laser ranging echo, laser irradiation echo, TV target and scene, infrared target and scene in the real combat and training environment. The laser echo simulation distance quantization error of the above-mentioned multi-electro-optical target and scene simulation test system product is small, the dynamic range is large, the TV and infrared image space pixels are large, the dynamic frame rate is high, the spectral range is large, and all optical paths are transmitted with a common aperture. The resolution of the above-mentioned multi-electro-optical target and scene simulation test system reaches 1024×768 for infrared and 1400×1024 for visible; the energy uniformity is good, which can reach 95%; the stray light suppression is high, and the stray light coefficient is ≤2% given by the stray light reverse simulation analysis; the distance simulation accuracy is high, which can reach ≤2m@100Km; the image dynamic frame rate is high, which can reach 100Hz; the above-mentioned multi-electro-optical target and scene simulation test system belongs to the common optical path design, with high integration and strong versatility.

[0066] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A multi-electro-optical target and scene simulation test system, characterized in that: It includes a target and scene simulator, a laser distance simulator, a laser echo simulator, a multi-band beam combining device, a flight platform motion simulation device, and a main control computer; the main control computer is connected to the flight platform motion simulation device, the target and scene simulator, the laser distance simulator, the laser echo simulator, and the multi-band beam combining device, and sends control motion instructions to the flight platform motion simulation device, sends scene images to the target and scene simulator, and sends control instructions to the laser distance simulator and the laser echo simulator; the target and scene simulator projects the emitted television / infrared light signal to the device under test through the multi-band beam combining device; the laser distance simulator and the laser echo simulator transmit and receive laser signals to the device under test through the multi-band beam combining device.

2. The multi-element optoelectronic target and scene simulation test system according to claim 1, characterized in that: The target and scene simulator includes a first signal processing module, a driving circuit, a composite light source assembly, a spectroscope, a television micromirror assembly, an infrared micromirror assembly, and a beam combiner; the first signal processing module receives the image information output by the main control computer, controls the deflection of the television micromirror assembly and the infrared micromirror assembly through the driving circuit to realize optical switching, and the composite light source assembly realizes multi-element light path beam splitting through the spectroscope, and the light beam vertically enters the television micromirror assembly and the infrared DMD micromirror assembly, and then is coupled by the beam combiner to output multi-element photoelectric targets and scenes.

3. The multi-element optoelectronic target and scene simulation test system according to claim 2, characterized in that: The first signal processing module includes a signal processing circuit, a frame frequency synchronization circuit, an image decoding circuit and a pulse width modulation circuit. The signal processing circuit receives the image information output by the main control computer, and transmits it to the driving circuit after being frequency synchronized, decoded and modulated in parallel by the frame frequency synchronization circuit, the image decoding circuit and the pulse width modulation circuit; the image decoding circuit collects the input image signal and converts it into a digital storable signal for subsequent circuit processing; the frame frequency synchronization circuit synchronizes the frequency of the photodetector with the TV micromirror assembly and the infrared micromirror assembly to achieve stable image transmission between the infrared detection system and the TV micromirror assembly and the infrared micromirror assembly; that is, the image information is refreshed at a high speed according to the frequency and phase of the input frame synchronization pulse, the input image signal frame frequency and the synchronization signal frequency are exactly the same, and this frequency can vary within the range of 10Hz to 100Hz; the pulse width modulation circuit selects a row of the pixel array of the TV micromirror assembly and the infrared micromirror assembly for refreshing, and the pixel array of the TV micromirror assembly and the infrared micromirror assembly completes the refreshing of the entire array in a row-by-row manner. The micromirror array will be refreshed many times within the time of a frame image, and a grayscale image is displayed through the light integration effect of the infrared detection system.

4. The multi-element optoelectronic target and scene simulation test system according to claim 3, characterized in that: The composite light source assembly comprises a composite light source and an illumination optical system.

5. The multi-element optoelectronic target and scene simulation test system according to claim 4, characterized in that: The composite light source is a low-temperature cavity black body; the illumination optical system is a collimating optical system composed of a meniscus lens and two biconvex lenses, and the meniscus lens is located between the two biconvex lenses.

6. The multi-element optoelectronic target and scene simulation test system according to claim 5, characterized in that: The beam splitter is subjected to coating treatment.

7. The multi-element optoelectronic target and scene simulation test system according to claim 6, characterized in that: The television micromirror assembly includes a visible DMD micromirror and a visible TIR prism; the infrared micromirror assembly also includes an infrared DMD micromirror and an infrared TIR prism; the surface of the infrared DMD micromirror is coated with an infrared reflective film; the visible TIR and infrared TIR prisms are both formed by gluing two prisms together; the visible TIR prism is placed between the beam splitter and the visible DMD micromirror, and the infrared TIR prism is placed between the beam splitter and the infrared DMD micromirror.

8. The multi-element optoelectronic target and scene simulation test system according to claim 1, characterized in that: The laser distance simulator comprises a time delay module and a laser echo module. The external laser obtains laser pulse width information through the time delay module and outputs it to the main control computer. The time delay module triggers the laser echo module to drive and start timing. The laser echo module is connected to the main control computer, receives the laser echo parameter setting instruction from the main control computer, and outputs the echo signal.

9. The multi-element optoelectronic target and scene simulation test system according to claim 8, characterized in that: The time delay module includes a first adjustable attenuation component, a first photodetector, a pulse measurement circuit and a delay circuit. The external laser is converged onto the target surface of the first photodetector through the first adjustable attenuation component. The pulse width measurement circuit is connected to the first adjustable attenuation component to obtain the laser pulse width information converged on the target surface of the first photodetector, and outputs it to the main control computer; the delay circuit triggers the laser echo module to start timing.

10. The multi-element optoelectronic target and scene simulation test system according to claim 9, characterized in that: The laser echo module comprises a laser collimator, a first laser, an infrared indicator, a semi-transparent and semi-reflective mirror and a reflector. The first laser and the infrared indicator are connected to the main control computer to receive a laser echo parameter setting instruction from the main control computer; the delay circuit is connected to the first laser to trigger the first laser to start timing, the first laser sends out a laser echo signal according to the laser echo parameter setting instruction of the main control computer, the laser echo signal is collimated by the laser collimator and then outputs the laser echo signal through the semi-transparent and semi-reflective mirror; the infrared indicator sends out an infrared signal according to the laser echo parameter setting instruction of the main control computer, after being reflected by the reflector, the infrared signal is merged into the laser echo signal through the semi-transparent and semi-reflective mirror to assist in optical path alignment.

11. The multi-element optoelectronic target and scene simulation test system according to claim 10, characterized in that: The laser echo simulator comprises an irradiation light information detection module and a target echo emission module. The external laser obtains the coded information of the external laser through the irradiation light information detection module and outputs it to the main control computer for decoding; the main control computer outputs the echo instruction to the target echo emission module, and the target echo emission module outputs the echo laser after attenuation shaping.

12. The multi-element optoelectronic target and scene simulation test system according to claim 11, characterized in that: The irradiation light information detection module includes a second adjustable attenuation component, a second photodetector and a second signal processing module. The external laser is converged to the target surface of the second photodetector through the second adjustable attenuation component, and the coded information of the external laser is obtained through analysis by the second signal processing module.

13. The multi-element optoelectronic target and scene simulation test system according to claim 12, characterized in that: The target echo emission module comprises a second laser and a laser collimator attenuator. The second laser receives an echo output instruction from the main control computer, emits an echo laser, and outputs the echo laser after being attenuated and shaped by the laser collimator attenuator.

14. The multi-element optoelectronic target and scene simulation test system according to claim 13, characterized in that: The laser collimation attenuator is a fiber collimation attenuator; the fiber collimation attenuator comprises an electrically adjustable fiber attenuator and a fiber collimator.

15. The multi-element optoelectronic target and scene simulation test system according to claim 10 or 13, characterized in that: The first laser and the second laser are both fiber lasers.

16. The multi-element optoelectronic target and scene simulation test system according to claim 9 or 12, characterized in that: The first adjustable attenuation component and the second adjustable attenuation component both use paddle-type attenuation plates, and the attenuation plates have different transmittances; the first photodetector and the second photodetector are both silicon-based detectors.

17. The multi-element optoelectronic target and scene simulation test system according to claim 1, characterized in that: The multi-band beam combining device includes a folding reflector and a laser / scene beam combining mirror. The lasers emitted by the target and scene simulator are projected onto the folding reflector so that the light path vertically cuts into the laser / scene beam combining mirror. Then, through reflection by the laser scene beam combining mirror, the multi-element light signals are output to the laser distance simulator and the laser echo simulator through a common aperture.

18. The multi-element optoelectronic target and scene simulation test system according to claim 17, characterized in that: The folding reflector is a normal space vertical structure; the surface of the laser / scene beam combining mirror is coated with a multi-element spectral film system.

19. The multi-element optoelectronic target and scene simulation test system according to claim 1, characterized in that: The flight platform motion simulation device comprises a moving component, a bearing component and a base, and the base supports the moving component through the bearing component to complete pitch and azimuth motion.

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