Portable laser infrared composite target simulator

Abstract

The invention discloses a portable laser infrared composite target simulator which comprises a laser infrared composite target simulator body and a control case. The laser infrared composite target simulator main body comprises a card type optical system, a composite light path window, a pluggable target, a laser collimation focusing system and a blackbody radiation source, and the composite light path window, the pluggable target and the card type optical system are sequentially arranged in the light path direction; the laser collimating and focusing system introduces and focuses laser to the composite light path window, the composite light path window composites the laser and infrared light emitted by the blackbody radiation source to form a composite light beam, and the composite light beam penetrates through the pluggable target and finally enters the cassette optical system; and the control case is connected with the laser infrared composite target simulator main body through the laser optical fiber and the black body control cable, and is used for adjusting parameters of the laser and the infrared light emitted by the black body radiation source. The target simulator provided by the invention is small in size, light in weight, good in portability and high in adaptability to different test environments.

Description

Technical Field

[0001] The present invention relates to the technical field of composite target simulation and emulation, and particularly to a portable laser-infrared composite target simulator. Background Art

[0002] During the development of a composite optical band detection system, it is necessary to conduct semi-physical simulation experiments on composite targets to evaluate the relevant performance of the composite optical band detection system and assess the working performance and comprehensive capabilities of detection modules in different bands. Currently, the relevant performance verification of the composite optical band detection system is mainly carried out by using a large-aperture collimator and light source switching. This method is inconvenient in actual use, mainly for laboratory environments, and can only test the tracking and aiming capabilities by mounting the composite optical band detection system on a turntable. Moreover, the current composite target simulation and emulation system is large in size and not easily portable, failing to meet the usage requirements of on-site performance verification tests. Summary of the Invention

[0003] Based on the above, the purpose of the present invention is to provide a portable laser-infrared composite target simulator, which provides a composite band target for a device under test through the combination of laser and infrared optical paths, generates an infrared target with a certain equivalent radiation temperature difference, realizes the detection of the receiving optical axis of the device under test, and simultaneously improves the portability of the target simulator and its adaptability to different test environments.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A portable laser-infrared composite target simulator includes a laser-infrared composite target simulator main body and a control chassis;

[0006] The laser-infrared composite target simulator main body includes: a cassegrain optical system, a composite optical path window, a pluggable target, a laser collimation and focusing system, and a blackbody radiation source. The composite optical path window, the pluggable target, and the cassegrain optical system are arranged in sequence along the optical path direction; the laser collimation and focusing system guides and focuses the laser to the composite optical path window, the composite optical path window combines the laser and the infrared light emitted by the blackbody radiation source to form a composite beam, and the composite beam passes through the pluggable target and finally enters the cassegrain optical system;

[0007] The control chassis is connected to the laser-infrared composite target simulator main body through a laser optical fiber and a blackbody control cable, and is used to adjust the parameters of the laser and the infrared light emitted by the blackbody radiation source.

[0008] As a preferred solution of the portable laser-infrared composite target simulator, the cassegrain optical system includes a primary mirror and a secondary mirror, and the primary mirror and the secondary mirror are arranged in sequence along the optical path direction and are located on the same axis.

[0009] As a preferred solution of a portable laser-infrared composite target simulator, the composite optical path window includes a semi-transparent and semi-reflective mirror, which is used to selectively transmit infrared light and reflect the laser irradiated at 45°.

[0010] As a preferred solution of a portable laser-infrared composite target simulator, the laser collimation and focusing system includes a collimating mirror and a converging mirror arranged in sequence along the optical path direction, which are used to introduce and focus the laser with a certain divergence angle into the composite optical path window through a fiber optic interface.

[0011] As a preferred solution of a portable laser-infrared composite target simulator, the pluggable target is arranged at the focal plane position of the cassette optical system, and the pluggable target is one of a small hole-shaped, cross-shaped, or four-bar-shaped target.

[0012] As a preferred solution of a portable laser-infrared composite target simulator, the surface of the radiation plate of the blackbody radiation source is sprayed with high-emissivity black paint to improve the surface emissivity and temperature field uniformity.

[0013] As a preferred solution of a portable laser-infrared composite target simulator, the control chassis includes:

[0014] A laser light source, a laser light source drive and temperature control circuit, which is used to control the laser light source and provide the required pulsed laser for the main body of the portable laser-infrared composite target simulator;

[0015] A blackbody radiation source control circuit, including a blackbody radiation source controller and a blackbody radiation source temperature controller. The blackbody radiation source controller is used to control heating and cooling to reach a dynamic balance; the blackbody radiation source temperature controller is used to realize heating and cooling of the heating / cooling unit;

[0016] A configuration screen, which is used to provide a human-machine interaction interface, set laser parameters, and set the radiation temperature difference of the infrared radiation source;

[0017] A power supply, which is used to supply power to the portable laser-infrared composite target simulator.

[0018] The beneficial effects of the present invention are:

[0019] The present invention adds a composite optical path window in front of the cassette optical system for echo simulation transmission, thereby realizing laser-infrared composite echo simulation, achieving laser-infrared compounding, and having a convenient measurement method. By setting up a portable laser-infrared composite target simulator main body and a control chassis, placing the portable laser-infrared composite target simulator main body on a turntable, setting the laser and blackbody radiation parameters through the control chassis, and cooperating with the turntable to test performance indicators such as the optical axis consistency, tracking accuracy, and tracking angular velocity of the device under test, it is more convenient to use. The laser-infrared composite target simulator is small in size, light in weight, and has good portability, enabling the present invention to not only carry out composite target hardware-in-the-loop simulation experiments in a laboratory environment, but also conduct functional verification of composite optical band detection systems on-site. The pluggable target can switch between different types and sizes of targets such as small holes, crosses, and four rods, with high flexibility and good adaptability. By spraying high-emissivity black paint on the surface of the radiation plate, the emissivity of the radiation plate surface and the temperature field uniformity are improved. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0021] Figure 1 It is a schematic diagram of the composition of the laser-infrared composite target simulator provided by the embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the principle of the laser-infrared composite target simulator main body provided by the embodiment of the present invention.

[0023] In the figure: 11, secondary mirror; 12, primary mirror; 2, pluggable target; 3, laser collimation and focusing system; 4, composite optical path window; 5, blackbody radiation source. Detailed Description of the Embodiment

[0024] The following will further elaborate on the present invention in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0025] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] As Figures 1 to 2 shown, an embodiment of the present invention provides a portable laser infrared composite target simulator, including: a laser infrared composite target simulator main body and a control chassis. The laser infrared composite target simulator main body includes: a cassette optical system, a composite optical path window 4, a pluggable target 2, a laser collimation and focusing system 3, and a blackbody radiation source 5. The composite optical path window 4, the pluggable target 2, and the cassette optical system are arranged in sequence along the optical path direction; the laser collimation and focusing system 3 guides and focuses the laser to the composite optical path window 4. The composite optical path window 4 combines the laser and the infrared light emitted by the blackbody radiation source 5 to form a composite beam. The composite beam passes through the pluggable target 2 and finally enters the cassette optical system; the control chassis is connected to the laser infrared composite target simulator main body through a laser optical fiber and a blackbody control cable to adjust the parameters of the laser and the infrared light emitted by the blackbody radiation source 5. The embodiment of the present invention can simulate the 1064nm laser echo with a specific repetition frequency and pulse width, realize the linear adjustment of the output power through the calibration of the output power, and ensure the consistency of the laser and infrared optical axes according to the characteristics of the optical path, provide a composite target signal with laser and infrared bands for the device under test, and detect the receiving optical axis of the device under test through the consistency of the simulator optical axis.

[0027] As Figure 2As shown, the Cassegrain optical system includes a primary mirror 12 and a secondary mirror 11. The primary mirror 12 and the secondary mirror 11 are arranged in sequence along the optical path direction and are located on the same axis to achieve composite optical path transmission and simulation of a far target, thereby ensuring the coaxiality of laser and infrared. The composite optical path window 4 includes a semi-transmissive and semi-reflective mirror. The semi-transmissive and semi-reflective mirror is a window that transmits infrared light at 45° and reflects laser light at 45°. It can selectively transmit the infrared light radiated by the blackbody radiation source 5 and reflect the laser light irradiated at 45°. The pluggable target 2 is arranged at the focal plane position of the Cassegrain optical system and can switch between different target types and sizes, such as a small hole target, a cross target, and a four-bar target, to realize the performance test of the composite optical band detection system, with high flexibility and good adaptability. The laser collimation and focusing system 3 includes a collimating mirror and a focusing mirror arranged in sequence along the optical path direction. The collimating mirror is specifically an expanded beam collimating mirror, and the focusing mirror is specifically a focusing mirror. It can introduce and focus the laser with a certain divergence angle through the FC / PC fiber optic interface to the position of the pluggable target 2. The laser collimation and focusing system 3 is specifically a laser illumination module.

[0028] In the embodiment of the present invention, the blackbody radiation source 5 is specifically an infrared radiation source. The infrared radiation source can generate an infrared band and includes components such as a radiation plate, a temperature sensor, a heating / cooling unit, a heat sink, and a fan. Among them, the radiation plate is heated and cooled by the heating / cooling unit to achieve the required infrared radiation. Its surface is sprayed with high-emissivity black paint to improve the surface emissivity and temperature field uniformity. The temperature sensor collects the temperature of the radiation plate and is received and processed by the infrared radiation source controller. The heating / cooling unit is a Peltier semiconductor refrigeration device, which uses the current thermal effect and the direction of the supply current to realize the heating and cooling treatment of the radiation plate. The heat sink and the fan achieve a large dynamic thermal balance, can improve the temperature field uniformity and stability, and obtain the best electric control temperature effect.

[0029] Specifically, the control chassis includes a laser light source, a laser light source drive and temperature control circuit, a blackbody radiation source 5 control circuit, a configuration screen, and a power supply. For the laser light source, the laser light source drive and temperature control circuit, the laser light source is the pulsed laser required for the portable laser infrared composite target simulator main body, and is received by the laser collimation and focusing system 3 through optical fiber transmission. The laser light source drive and temperature control circuit can control the semiconductor laser. Among them, the laser light source drive mainly modulates parameters such as output energy, pulse width, and repetition frequency, so as to realize the semiconductor laser outputting pulsed laser with corresponding parameters. The temperature control circuit mainly monitors the working temperature of the semiconductor laser through the negative feedback circuit mode, and can ensure that the semiconductor laser works at a constant temperature, so as to realize the stable laser output power; for the blackbody radiation source 5 circuit, specifically the infrared radiation source control circuit, it includes a blackbody radiation source 5 controller and a blackbody radiation source 5 temperature controller. The blackbody radiation source 5 controller loads a constant current for the temperature sensor, converts the resistance change of the sensor into a voltage signal change to reflect the temperature change, and performs feedback adjustment according to the difference between the temperature measured by the temperature sensor and the set target temperature, adjusting the magnitude and direction of the current flowing into the heating / cooling unit. Finally, heating and cooling reach a dynamic balance, and the temperature is controlled within the set target temperature; the blackbody radiation source 5 temperature controller is the drive circuit of the heating / cooling unit, which converts the voltage signal converted by the blackbody radiation source 5 controller, performs signal conversion and power amplification, and then changes the magnitude and direction of the power current to realize the heating and cooling of the heating / cooling unit; the power supply powers each system and module of the simulator; the system master control is the configuration screen for human-computer interaction, which can be controlled through the communication protocols corresponding to the laser light source drive and temperature control circuit and the infrared radiation source control circuit, that is, controlling the laser light source drive and temperature control circuit and the infrared radiation source control circuit. Specifically, it can control the output parameters of the laser, such as energy magnitude, pulse width, repetition frequency and other parameters, and can also control the parameters of infrared radiation, such as radiation temperature, radiation temperature difference and other parameters.

[0030] The connection between the portable laser infrared composite target simulator main body and the control chassis mainly includes a laser FC / PC optical fiber and a blackbody control cable. In the experimental environment, the portable laser infrared composite target simulator main body can be placed on a turntable. By setting the laser and blackbody radiation source 5 parameters through the control chassis, it can cooperate with the turntable to test performance indicators such as the optical axis consistency, tracking accuracy, and tracking angular velocity of the device under test. It is convenient to use. At the same time, in the embodiment of the present invention, the laser infrared composite target simulator is small in volume, light in weight, and has good portability. It can not only carry out composite target hardware-in-the-loop simulation experiments in the laboratory environment, but also carry out functional verification of the composite optical band detection system on-site.

[0031] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A portable laser-infrared composite target simulator, characterized in that, It includes a laser-infrared composite target simulator main body and a control chassis; The laser-infrared composite target simulator main body includes: a cassette optical system, a composite optical path window, a pluggable target, a laser collimation and focusing system, and a blackbody radiation source. The composite optical path window, the pluggable target, and the cassette optical system are arranged in sequence along the optical path direction. The laser collimation and focusing system imports and focuses the laser to the composite optical path window. The composite optical path window combines the laser and the infrared light emitted by the blackbody radiation source to form a composite beam. The composite beam passes through the pluggable target and finally enters the cassette optical system; The control chassis is connected to the laser-infrared composite target simulator main body through a laser optical fiber and a blackbody control cable, and is used to adjust the parameters of the laser and the infrared light emitted by the blackbody radiation source.

2. The portable laser infrared composite target simulator according to claim 1, wherein The cassette optical system includes a primary mirror and a secondary mirror. The primary mirror and the secondary mirror are arranged in sequence along the optical path direction and are located on the same axis.

3. The portable laser infrared composite target simulator according to claim 1, wherein The composite optical path window includes a semi-transparent and semi-reflective mirror, which is used to selectively transmit infrared light and reflect the laser irradiated at 45°.

4. The portable laser infrared composite target simulator according to claim 1, characterized in that, The laser collimation and focusing system includes a collimating mirror and a converging mirror arranged in sequence along the optical path direction, and is used to import and focus the laser with a certain divergence angle through a fiber optic interface to the composite optical path window.

5. The portable laser infrared composite target simulator according to claim 1, characterized in that, The pluggable target is arranged at the focal plane position of the cassette optical system, and the pluggable target is one of a small hole shape, a cross shape, and a four-rod shape target.

6. The portable laser infrared composite target simulator according to claim 1, wherein, The surface of the radiation plate of the blackbody radiation source is sprayed with high-emissivity black paint, which is used to improve the surface emissivity and the temperature field uniformity.

7. The portable laser infrared composite target simulator according to claim 1, wherein The control chassis includes: A laser light source, a laser light source drive and temperature control circuit. The laser light source drive and temperature control circuit is used to control the laser light source and provide the required pulsed laser for the portable laser-infrared composite target simulator main body; A blackbody radiation source control circuit, including a blackbody radiation source controller and a blackbody radiation source temperature controller. The blackbody radiation source controller is used to control the heating and cooling to reach a dynamic balance; the blackbody radiation source temperature controller is used to realize the heating and cooling of the heating / cooling unit; A configuration screen, which is used to provide a human-machine interaction interface, set laser parameters, and set the radiation temperature difference of the infrared radiation source; A power supply, which is used to supply power to the portable laser-infrared composite target simulator.

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