Auxiliary equipment and system for thermal infrared performance testing

Abstract

This utility model relates to the field of thermal infrared performance testing technology, and discloses an auxiliary device and system for thermal infrared performance testing. The auxiliary device includes a support, a heating plate, and a temperature control box. The heating plate and temperature control box are mounted on the support, and the temperature control box is electrically connected to the heating plate, controlling the surface temperature of the heating plate. The heating plate includes a metal heating element and a high emissivity coating adhered to its surface. The high emissivity coating is positioned towards the camouflage net being tested. This method is low-cost, high-precision, and easy to implement, thereby improving the reliability and economy of testing the thermal shielding performance of camouflage nets, and solving the technical problems of high cost, complex structure, poor temperature uniformity, and limited large-scale application of heating plates.

Description

Technical Field

[0001] This utility model relates to the field of thermal infrared performance testing technology, and in particular, to an auxiliary device for thermal infrared performance testing. Furthermore, this utility model also relates to a thermal infrared performance testing system including the aforementioned auxiliary device. Background Technology

[0002] The thermal shielding performance of camouflage nets is typically evaluated using heated plate technology. This technology works by simulating the infrared radiation characteristics of a high-temperature target and measuring the degree to which the camouflage net attenuates thermal radiation (i.e., thermal transmittance). Modern infrared detection technologies (such as thermal imagers and infrared guidance equipment) can identify the temperature difference between the target and its environment, while camouflage nets need to achieve effective stealth through thermal insulation and spectral matching. In a laboratory environment, heated plates serve as a standard heat source for accurately measuring the thermal transmittance of the camouflage net.

[0003] Currently, heated flat plates on the market mainly include the following structures:

[0004] 1. Far-infrared heating plate: It adopts a composite structure of resin layer, carbon crystal heating layer and far-infrared ceramic coating;

[0005] 2. Microcrystalline plate-based heating plate: composed of microcrystalline plate, nano-insulating coating, nickel alloy heating element and ceramic coating;

[0006] 3. Stainless steel heating plate: Heating is achieved by combining a 304 stainless steel base plate with an intelligent temperature control system.

[0007] While the aforementioned heating plates can meet the testing requirements, their manufacturing costs are high, and some structures are complex, hindering large-scale deployment. Furthermore, existing heating plates still have shortcomings in temperature uniformity control, making it difficult to ensure that the temperature difference across the entire heating surface remains stable within ±2℃, thus affecting the accuracy of the test data. Utility Model Content

[0008] This invention provides an auxiliary device and system for thermal infrared performance testing, which is low in cost, high in accuracy and easy to implement, thereby improving the reliability and economy of thermal shielding performance testing of camouflage nets, and solving the technical problems of high cost, complex structure, poor temperature uniformity and unfavorable large-scale promotion of heating plates.

[0009] According to one aspect of the present invention, a thermal infrared performance testing auxiliary device is provided, including a bracket, a heating plate and a temperature control box. The heating plate and the temperature control box are arranged on the bracket, and the temperature control box is electrically connected to the heating plate. The surface temperature of the heating plate is controlled by the temperature control box. The heating plate includes a metal heating plate and a high emissivity coating attached to the surface of the metal heating plate. The high emissivity coating is arranged towards the camouflage net being tested.

[0010] Furthermore, the high emissivity coating is a metal oxide ceramic coating.

[0011] Furthermore, the high emissivity coating is a carbon-based composite coating.

[0012] Furthermore, the thickness of the high emissivity coating is 50μm-200μm.

[0013] Furthermore, multiple sets of electric heating tubes are evenly installed on the side of the metal heating plate away from the high emissivity coating. Each set consists of three electric heating tubes and is temperature-controlled by the temperature control instrument in the temperature control box. Multiple temperature control instruments control the temperature of multiple sets of electric heating tubes in different zones, thereby achieving constant temperature control.

[0014] Furthermore, a serpentine groove is formed on the side of the metal heating plate away from the high emissivity coating, and a resistance wire is embedded in the serpentine groove, with the temperature control box electrically connected to the resistance wire; or a heating conductive circuit is etched on the side of the metal heating plate away from the high emissivity coating, and the heating conductive circuit is arranged in a serpentine pattern on the surface of the metal heating plate, with the temperature control box electrically connected to the conductive circuit.

[0015] Furthermore, locking casters are installed at the bottom of the bracket.

[0016] Furthermore, the stent is a non-metallic, non-magnetic stent.

[0017] According to another aspect of the present invention, a thermal infrared performance testing system is also provided, including the aforementioned thermal infrared performance testing auxiliary equipment, sample holder, and thermal imager; the thermal infrared performance testing auxiliary equipment, sample holder, and thermal imager are arranged at intervals.

[0018] Furthermore, the thermal infrared performance testing system also includes a slide rail, at least two of the following: thermal infrared performance testing auxiliary equipment, sample holder, and thermal imager are slidably arranged on the slide rail, thereby adjusting the distance between them.

[0019] Furthermore, the thermal infrared performance testing system also includes a windproof cover with a low reflectivity layer attached to the inner wall surface; and / or the thermal infrared performance testing system also includes a detachable background plate.

[0020] This utility model has the following beneficial effects:

[0021] 1. Simplified Structure and Cost Optimization: By adopting a structural design that combines a metal heating plate with a high-emissivity coating, the composition of the heating plate is significantly simplified compared to existing multi-layered composite far-infrared heating plates or microcrystalline plate-based heating plates. The metal substrate is easy to process and has a lower cost, and the high-emissivity coating can be directly adhered to the metal surface without the need for complex intermediate layers, thereby reducing the overall manufacturing cost.

[0022] 2. Improved Temperature Control Stability: The electrical connection design between the temperature control chamber and the metal heating plate allows for precise control of the heating plate's surface temperature. The high thermal conductivity of the metal substrate, combined with the uniform radiation characteristics of the high emissivity coating, facilitates a uniform temperature distribution on the heating surface, providing a stable thermal environment for camouflage net thermal transmittance testing.

[0023] 3. Enhanced Test Reliability: The high-emissivity coating is positioned facing the camouflage net under test, effectively simulating the infrared radiation characteristics of high-temperature targets and ensuring the authenticity and consistency of the thermal radiation signal. This avoids the problem of reduced radiation efficiency caused by interlayer thermal resistance in existing technologies, thereby improving the accuracy of thermal shielding performance test data.

[0024] 4. Improved ease of use: The integrated design of the heating plate and temperature control box in the bracket facilitates equipment movement and positioning, while reducing interference from external wiring. The overall structure is compact and functionally defined, meeting the requirements of laboratory testing environments for ease of operation.

[0025] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the thermal infrared performance testing auxiliary device according to a preferred embodiment of the present invention;

[0028] Figure 2 This is one of the structural schematic diagrams of a preferred embodiment of the thermal infrared performance testing system of this utility model;

[0029] Figure 3 This is the second schematic diagram of the thermal infrared performance testing system of the preferred embodiment of this utility model.

[0030] Legend:

[0031] 100, Support; 200, Heating plate; 201, Metal heating plate; 202, High emissivity coating; 300, Temperature control box; 400, Camouflage net to be tested; 500, Locking casters; 600, Auxiliary equipment for thermal infrared performance testing; 700, Sample holder; 800, Thermal imager; 900, Slide rail. Detailed Implementation

[0032] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0033] Figure 1 This is a schematic diagram of the structure of the thermal infrared performance testing auxiliary device according to a preferred embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of a preferred embodiment of the thermal infrared performance testing system of this utility model; Figure 3 This is the second schematic diagram of the thermal infrared performance testing system of the preferred embodiment of this utility model.

[0034] like Figure 1 As shown, the thermal infrared performance testing auxiliary equipment of this embodiment includes a bracket 100, a heating plate 200, and a temperature control box 300. The heating plate 200 and the temperature control box 300 are arranged on the bracket 100. The temperature control box 300 is electrically connected to the heating plate 200 and controls the surface temperature of the heating plate 200. The heating plate 200 includes a metal heating plate 201 and a high emissivity coating 202 attached to the surface of the metal heating plate 201. The high emissivity coating 202 is arranged in the direction of the camouflage net 400 being tested. The thermal infrared performance testing auxiliary equipment supports the heating plate 200 and the temperature control box 300 via a bracket 100. It employs a structural design combining a metal heating plate 201 with a high emissivity coating 202. Compared to existing multi-layer composite far-infrared heating plates or microcrystalline substrate heating plates, this significantly simplifies the composition of the heating plate 200. The metal substrate is easy to process and has a lower cost. The high emissivity coating 202 can be directly adhered to the metal surface without complex intermediate layers, thus reducing overall manufacturing costs. The electrical connection between the temperature control box 300 and the metal heating plate 201 allows for precise control of the surface temperature of the heating plate 200 via the temperature control box 300. The high thermal conductivity of the metal substrate, combined with the high emissivity coating... The uniform radiation characteristics of layer 202 facilitate a uniform temperature distribution on the heating surface, providing a stable thermal environment for the thermal transmittance test of the camouflage net. The high emissivity coating 202, oriented towards the camouflage net 400 under test, effectively simulates the infrared radiation characteristics of high-temperature targets, ensuring the authenticity and consistency of the thermal radiation signal. This avoids the radiation efficiency reduction problem caused by interlayer thermal resistance in existing technologies, thereby improving the accuracy of thermal shielding performance test data. The integrated layout of the bracket 100, combining the heating plate 200 and the temperature control box 300, facilitates equipment movement and positioning, while reducing external wiring interference. The overall structure is compact and functionally clear, meeting the requirements of laboratory testing environments for ease of operation. Through these structural improvements, while ensuring testing accuracy, the technical problems of high cost and insufficient temperature control uniformity in existing heating plates 200 are solved.

[0035] In this embodiment, the high emissivity coating 202 is a metal oxide ceramic coating. The high emissivity coating 202 of the heating plate 200 adopts a metal oxide ceramic coating. The metal oxide ceramic coating has a stable high emissivity (typically ≥0.9) in the infrared band (3μm-5μm, 8μm-14μm), which can more realistically simulate the thermal radiation characteristics of the equipment and ensure the reliability of the thermal transmittance test data of the camouflage net; the metal oxide ceramic coating has high thermal stability and is not easily oxidized or peeled off under long-term high temperature (e.g., 200℃-500℃) working environment, avoiding test errors caused by coating degradation; the metal oxide ceramic coating can enhance the uniformity of thermal radiation, reduce the temperature gradient on the surface of the heating plate, and ensure that the temperature difference in the test area is controlled within ±2℃; the metal oxide ceramic coating is firmly bonded to the metal substrate. Through commonly known processes such as spraying or sintering, the metal oxide ceramic coating can form a stable bond with the metal heating plate 201 (e.g., aluminum alloy, stainless steel), avoiding coating cracking or peeling due to differences in thermal expansion coefficients. In the field of thermal infrared performance testing, the commonly used metal oxide ceramic coating (existing technology) is an alumina-based coating.

[0036] In this embodiment, the high emissivity coating 202 is a carbon-based composite coating. The high emissivity coating 202 of the heating plate 200, being a carbon-based composite coating, possesses naturally high emissivity (typically ≥0.95) in the infrared band (3μm-5μm, 8μm-14μm), enabling more accurate simulation of the infrared radiation characteristics of high-temperature targets and improving the accuracy of camouflage net thermal transmittance testing. The low density of the carbon-based composite coating reduces the overall weight of the heating plate 200, while also possessing a certain degree of flexibility to adapt to the thermal expansion and deformation of the metal substrate, reducing the risk of coating cracking. The high thermal conductivity of the carbon-based composite coating accelerates heat transfer, resulting in a more uniform surface temperature distribution on the heating plate 200 and shortening test preparation time. Carbon-based composite coatings are widely available, and the spraying or coating process is simple, reducing manufacturing costs compared to metal oxide ceramic coatings. In the field of thermal infrared performance testing, commonly used metal oxide ceramic coatings (existing technology) are silicon carbide coatings or graphite coatings.

[0037] In this embodiment, the thickness of the high emissivity coating 202 is 50μm-200μm. Limiting the thickness of the high emissivity coating 202 to 50μm-200μm balances infrared radiation performance and thermal conductivity requirements. During the thermal expansion and deformation of the metal substrate, a coating thickness of 50μm-200μm effectively alleviates thermal stress and avoids cracking or peeling caused by the difference in expansion coefficients between the coating and the substrate. This thickness range, combined with the high thermal conductivity of the metal substrate, ensures that the temperature gradient on the surface of the heating plate is controlled within a reasonable range, meeting the ±2℃ temperature difference requirement for testing. Too thin (<50μm) will result in incomplete coating coverage and reduced effective emissivity; too thick (>200μm) will increase thermal resistance and affect the heat transfer efficiency from the metal substrate to the coating.

[0038] In this embodiment, multiple sets of electric heating tubes are evenly installed on the side of the metal heating plate 201 facing away from the high emissivity coating 202. Each set consists of three electric heating tubes, and their temperature is controlled by a temperature controller in the temperature control box 300. Multiple temperature controllers control the temperature of each set of electric heating tubes in separate zones, thereby achieving constant temperature control. By zoning the electric heating tubes into groups of three and combining this with independent control by multiple temperature controllers, the temperature gradient problem caused by the lag in heat conduction on the metal plate surface is effectively overcome. Zoned temperature control can specifically compensate for edge heat dissipation effects, ensuring that the overall temperature difference of the heating plate 200 remains stable within the ±2℃ testing requirement range. Multiple independent temperature control units (temperature controllers) form a redundant design; even if a single heating element fails, the remaining zones can still maintain basic operation, avoiding test interruptions caused by the failure of a traditional single temperature control system. Thermal coupling between groups is actively suppressed through zoned adjustment strategies. Zoned temperature control can dynamically adjust power output according to the actual heat load of the test area, reducing ineffective energy consumption compared to overall temperature control. The parameters of each temperature controller can be set differently to match the heat dissipation characteristics of different areas. The modular design of the heating element groups allows for individual replacement of damaged units without disassembling the entire heating plate structure. The correspondence between temperature controllers and heating element groups is clear, facilitating fault diagnosis and calibration.

[0039] In this embodiment, a serpentine groove is formed on the side of the metal heating plate 201 facing away from the high emissivity coating 202, and a resistance wire is embedded in the serpentine groove. The temperature control box 300 is electrically connected to the resistance wire. Alternatively, a heating conductive circuit is etched on the side of the metal heating plate 201 facing away from the high emissivity coating 202. The heating conductive circuit is arranged in a serpentine pattern on the surface of the metal heating plate 201, and the temperature control box 300 is electrically connected to the conductive circuit. The topological structure of the serpentine groove or conductive circuit extends the heat flow path, so that the heating area forms a mesh distribution on the metal plate surface, effectively overcoming the local overheating problem caused by traditional linear heating elements. This structure improves the uniformity of surface temperature distribution, thereby meeting the ±2℃ temperature control accuracy requirement. The resistance wire and the metal substrate are embedded in the groove, or the conductive circuit and the metal substrate are integrally formed by etching, achieving zero interface thermal resistance conduction, shortening the thermal response time, and quickly reaching the steady state of the test temperature. The serpentine layout releases thermal stress through multi-directional bending design, avoiding resistance wire breakage caused by linear expansion. The serpentine structure maximizes the arrangement of heating circuits within a limited board area, increasing power density while maintaining an overall thin and light profile. Optionally, a serpentine heating and conductive circuit is formed on the back of the metal heating plate 201 through etching.

[0040] like Figure 1 As shown, in this embodiment, the bottom of the support 100 is equipped with locking casters 500. The locking casters 500 use a mechanical braking mechanism to fix the rotation and direction of the wheels, completely eliminating the risk of equipment displacement during testing and ensuring the accuracy of the distance between the heating plate 200 and the camouflage net 400 under test. The locking casters 500 allow the equipment to be quickly moved between different areas of the laboratory and adapt to slightly uneven ground. After locking, in conjunction with a leveling device, a horizontal accuracy of ±1° can be achieved, avoiding deviations in heat radiation measurement caused by base tilt.

[0041] In this embodiment, the bracket 100 is a non-metallic and non-magnetic bracket. Optionally, the locking caster 500 is also a non-metallic and non-magnetic locking caster 500. Using a non-metallic and non-magnetic bracket (such as a plastic bracket) or a non-metallic and non-magnetic locking caster 500 avoids the conduction interference of metal materials on the thermal field of the heating plate. The non-magnetic characteristic eliminates the measurement error of the temperature control system caused by the electromagnetic field, reducing the fluctuation range of the thermal transmittance test data. The thermal emissivity (<0.3) of the non-metallic and non-magnetic structure is significantly lower than that of a metal bracket, avoiding interference from the bracket's own infrared characteristics with the camouflage net test results; the non-magnetic structure design also avoids the risk of magnetic detection in the application environment. Optionally, the non-metallic bracket reduces weight, and combined with the nylon wheel design of the locking caster, the entire equipment can be moved and transported by a single person. Optionally, the locking caster 500 can also be replaced with ordinary rollers, but ordinary rollers do not have a locking and positioning function and have poorer structural stability compared to the locking caster 500.

[0042] like Figure 1 , Figure 2 and Figure 3 As shown, the thermal infrared performance testing system of this embodiment includes the aforementioned thermal infrared performance testing auxiliary equipment 600, sample holder 700, and thermal imager 800; the thermal infrared performance testing auxiliary equipment 600, sample holder 700, and thermal imager 800 are arranged at intervals. By integrating the three modules of thermal infrared performance testing auxiliary equipment 600, sample holder 700, and thermal imager 800 at fixed intervals, a standardized test optical path system is formed, ensuring that the geometric relationship between the radiation angle of the heating plate 200, the installation position of the camouflage net, and the observation field of view of the thermal imager remains constant, making the test data of different batches comparable. The fixed interval design of the sample holder 700 enables rapid positioning and installation of the camouflage net. The rigid spacing control between the thermal imager 800 and the heating plate 200 eliminates the viewing angle error caused by manual adjustment. The non-metallic support characteristics of the testing auxiliary equipment (see above) also prevent the thermal radiation of the support from interfering with the thermal imager readings. This design allows for compatibility with thermal imagers 800 of different specifications (such as mid-wave 3μm-5μm or long-wave 8μm-14μm devices), and only requires fine-tuning of the module spacing to meet multi-band testing needs. Optionally, the thermal infrared performance testing auxiliary equipment 600, the sample holder 700, and the thermal imager 800 are arranged in a straight line via a guide rail structure, with an adjustable spacing range of 50cm-150cm.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the thermal infrared performance testing system also includes a slide rail 900. At least two of the following components—the thermal infrared performance testing auxiliary equipment 600, the sample holder 700, and the thermal imager 800—are slidably arranged on the slide rail 900, thereby adjusting the distance between them. The linear guiding structure of the slide rail 900 allows for continuous and precise adjustment of the distance between the thermal infrared performance testing auxiliary equipment 600, the sample holder 700, and the thermal imager 800 (e.g., an adjustment range of 50cm-150cm), meeting the differentiated requirements of different standards for testing distance. By quickly switching the geometric relationship between the heating plate 200, the camouflage net under test 400, and the thermal imager 800 through the sliding module, it is compatible with: full-width testing of camouflage nets 400 of different sizes (adjusting the position of the sample holder 700), optimal field-of-view matching of the multi-band thermal imager 800 (adjusting the position of the thermal imager 800), and variable-angle thermal radiation characteristic analysis (offsetting the sliding thermal imager 800 to form a non-perpendicular observation angle). The modular sliding design allows for single-person spacing adjustment, with a repeatability accuracy of ±0.1mm after locking (using a locking mechanism such as a pin, buckle, or caliper). Optionally, at least one of the thermal infrared performance testing auxiliary equipment 600, sample holder 700, and thermal imager 800 forms a sliding pair with a slider and a slide rail 900. The slider is equipped with a scale indicator, and the slide rail 900 is set with a scale, thereby achieving precise spacing adjustment.

[0044] In this embodiment, the thermal infrared performance testing system also includes a windproof shield with a low-reflectivity layer attached to its inner wall; and / or the thermal infrared performance testing system also includes a detachable background plate. The windproof shield effectively suppresses: temperature fluctuations caused by forced convection heat dissipation on the surface of the heating plate 200, the influence of ambient airflow on the heat exchange of the camouflage net 400 under test, and airflow noise interference during measurement by the thermal imager 800, by physically isolating airflow. The detachable background plate allows for quick switching between different emissivity backgrounds (emissivity adjustable from 0.2 to 0.9) to simulate typical application environments such as jungles, deserts, and snowfields. Optionally, the background plate and the sample holder 700 adopt a snap-fit ​​connection design, thereby enabling quick assembly and disassembly of the background plate. Optionally, the stepped extinction structure at the edge of the background plate avoids interference from abrupt changes in boundary thermal radiation during testing.

[0045] In practice, an auxiliary device for testing thermal infrared performance is provided, comprising a heating plate 200, a movable plate base, heating elements, and a temperature control chamber 300. This significantly reduces equipment costs and can be used entirely as a heating plate 200 for measuring the thermal transmittance of laboratory camouflage nets. It achieves constant temperature control of the heating plate 200 at low cost, and through automatic temperature adjustment and manual assistance, the temperature difference between different areas of the heating plate 200 can be maintained within the required range (±2℃).

[0046] The thermal radiation performance of the heating plate 200 is achieved by spraying a high emissivity coating (the commonly known high emissivity coating 202 is sufficient) onto the metal heating plate 201, which can achieve the efficient thermal radiation conduction required during camouflage net testing.

[0047] When using the device, first connect the temperature control box 300 to a 380V-25KVA power supply. After powering on, set the 6 sets of automatic temperature controllers in the temperature control box 300 to T0+25℃ according to the ambient temperature T0. Wait for the 6 automatic temperature controllers to display that the set temperature has been reached (this process usually takes about 10 minutes).

[0048] Then turn on the thermal imager 800 and observe the temperature of the heating plate 200 on the thermal imager 800. By fine-tuning the set value on the temperature control instrument, control the temperature of the entire heating plate 200 on the thermal imager 800 within the range of T0+25±2℃. After the temperature stabilizes, the first group of thermal transmittance tests of the camouflage net can be carried out according to (GJB7927 standard).

[0049] Similarly, based on the first set of thermal transmittance test process, the temperature of the 6 sets of automatic temperature control instruments on the temperature control box 300 was set to T0+40±2℃, and after stabilization, the second set of thermal transmittance test was carried out.

[0050] Heating Working Principle: The heating plate 200 within the device is evenly equipped with 18 sets of electric heating tubes, arranged in groups of three. Each group is controlled by six temperature controllers on the temperature control box 300. After setting the target temperature (SV) on the temperature controllers, the controllers automatically control the electric heating tubes to heat the heating plate 200 to the set temperature (SV). The current temperature after heating can also be seen on the temperature controllers (PV), thus achieving constant temperature control.

[0051] Any matters not covered in this utility model are common knowledge.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thermal infrared performance testing auxiliary device, comprising a bracket (100), a heating plate (200) and a temperature control box (300), wherein the heating plate (200) and the temperature control box (300) are arranged on the bracket (100), the temperature control box (300) is electrically connected to the heating plate (200), and the surface temperature of the heating plate (200) is controlled by the temperature control box (300); Its features are, The heating plate (200) includes a metal heating plate (201) and a high emissivity coating (202) attached to the surface of the metal heating plate (201). The high emissivity coating (202) is used to be laid in the direction of the camouflage net (400) being tested.

2. The thermal infrared performance testing auxiliary equipment according to claim 1, characterized in that, The high emissivity coating (202) is a metal oxide ceramic coating.

3. The thermal infrared performance testing auxiliary equipment according to claim 1, characterized in that, The high emissivity coating (202) is a carbon-based composite coating.

4. The thermal infrared performance testing auxiliary equipment according to claim 1, characterized in that, The thickness of the high emissivity coating (202) is 50 μm-200 μm.

5. The thermal infrared performance testing auxiliary equipment according to any one of claims 1 to 4, characterized in that, Multiple sets of electric heating tubes are evenly installed on the side of the metal heating plate (201) away from the high emissivity coating (202). Each set of three electric heating tubes is controlled by the temperature control instrument of the temperature control box (300). Multiple temperature control instruments control the temperature of multiple sets of electric heating tubes in different zones, thereby achieving constant temperature control.

6. The thermal infrared performance testing auxiliary equipment according to any one of claims 1 to 4, characterized in that, A serpentine groove is formed on the side of the metal heating plate (201) facing away from the high emissivity coating (202), and a resistance wire is embedded in the serpentine groove. The temperature control box (300) is electrically connected to the resistance wire; or A heating conductive circuit is etched on the side of the metal heating plate (201) away from the high emissivity coating (202). The heating conductive circuit is arranged in a serpentine pattern on the surface of the metal heating plate (201). The temperature control box (300) is electrically connected to the conductive circuit.

7. The thermal infrared performance testing auxiliary equipment according to any one of claims 1 to 4, characterized in that, The bottom of the bracket (100) is equipped with locking casters (500).

8. A thermal infrared performance testing system, characterized in that, The device includes the thermal infrared performance testing auxiliary equipment (600), the sample holder (700), and the thermal imager (800) as described in any one of claims 1 to 7. The thermal infrared performance testing auxiliary equipment (600), the sample holder (700), and the thermal imager (800) are arranged at intervals.

9. The thermal infrared performance testing system according to claim 8, characterized in that, The thermal infrared performance testing system also includes at least two of the following: a slide rail (900), thermal infrared performance testing auxiliary equipment (600), a sample holder (700), and a thermal imager (800), which are slidably arranged on the slide rail (900) to adjust the distance between them.

10. The thermal infrared performance testing system according to claim 8, characterized in that, The thermal infrared performance testing system also includes a windproof shield, the inner wall of which is coated with a low-reflectivity layer; and / or The thermal infrared performance testing system also includes a detachable background panel.

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