Non-contact induction heating device for super-large-surface black body

Abstract

The invention provides a non-contact induction heating device for a super-large-surface black body. The non-contact induction heating device comprises an induction coil module, an induction coil power supply, a temperature sensor array, a temperature control device, a cooling module and an electric mechanical device, according to the invention, the black-body radiant panel with a super-large surface (the area is greater than or equal to 5 square meters) can be uniformly heated by using an electromagnetic induction heating technology in a vacuum environment, and the heating precision is controlled within 1 DEG C. The device is suitable for a vacuum environment, has the advantages of high precision, high uniformity, easy maintenance, high reliability and the like, and can meet strict requirements in a spacecraft calibration test.

Description

Technical Field

[0001] The present invention belongs to the technical field of spacecraft calibration test equipment, and specifically, relates to a non-contact induction heating device for a black body, and more particularly, to a non-contact induction heating device for uniformly and accurately heating a super-large black body radiation plate in a vacuum calibration experiment. The super-large surface refers to an area greater than or equal to 5 square meters. Background Art

[0002] In the spacecraft calibration test, the blackbody radiation source is used as the standard radiation source, and its temperature uniformity and stability directly affect the accuracy of the calibration results. The traditional heating method of the heating plate is difficult to achieve uniform heating of a large area of ​​blackbody radiation plate, and the process of pasting the heating plate is cumbersome and time-consuming; and as the area of ​​the blackbody radiation plate increases, more heating plates are used and the amount of adhesive is large, which easily leads to volatile pollutants that contaminate optical instruments.

[0003] The traditional heating plate is placed inside the blackbody calibrator. Since the thermal expansion system of the heating plate and the blackbody structural plate is different, the heating plate is prone to wrinkling and detaching during use, thus affecting the normal test. In addition, the blackbody calibrator has poor maintainability.

[0004] Patent document CN116793505A discloses a blackbody temperature control solution, which can achieve temperature offset between the heater and the refrigerator before reaching the target temperature by introducing a refrigerator in low-temperature and high-temperature tests.

[0005] However, the ultra-wide range in the patent document CN116793505A refers to the temperature range, which is an ultra-wide range of 30K to 400K. These black bodies are small in area (less than 1 square meter), and there is no problem of uniform heating of large-area black bodies. In addition, silicone grease and the like are required, which contains volatile pollutants and may contaminate optical instruments.

[0006] In the present invention, a super large black body with an area of ​​5 square meters or more is used, which solves the problem of uniform heating of a large black body. The heating method is non-contact heating, and no heating sheet, adhesive, silicone grease, etc. are required, and there is no volatile pollutant.

[0007] Therefore, there is an urgent need for a new type of heating device that can heat the ultra-large black body uniformly and with high precision in a vacuum environment. Summary of the invention

[0008] In view of the defects in the prior art, an object of the present invention is to provide a non-contact induction heating device for ultra-large black bodies.

[0009] A non-contact induction heating device for a super-large black body provided by the present invention comprises:

[0010] Induction coil module: set on the back of the blackbody radiation plate, heating the blackbody radiation plate through electromagnetic induction;

[0011] Temperature sensor array: evenly distributed on the surface of the blackbody radiation panel, used to monitor the temperature of the blackbody surface in real time;

[0012] Temperature control device: According to the feedback from the temperature sensor array, the output power of the power supply of the induction coil module is adjusted to realize the control of the temperature of the black body radiation plate;

[0013] Cooling module: It cools down the temperature of the blackbody radiation plate through the flowing medium, and regulates the temperature of the blackbody radiation plate together with the induction coil module.

[0014] Preferably, it also includes:

[0015] Electric mechanical device: used to move the induction coil module, control the distance between the induction coil module and the blackbody radiation plate, and regulate the heating efficiency and the temperature uniformity of the blackbody radiation plate by changing the distance.

[0016] Preferably, the induction coil module uses multiple layers of spiral coils with different diameters and different spacings.

[0017] Preferably, the induction coil module is obtained by:

[0018] Establish a blackbody structure model;

[0019] Establish a physical model of the induction coil;

[0020] Through simulation software, the induction coil is simulated; by setting the geometric shape, material properties, and excitation source of the induction coil, the magnetic field distribution, induced electromotive force, and power loss performance indicators are simulated; among which, the material properties include conductivity and magnetic permeability, and the excitation source includes current frequency and amplitude;

[0021] According to the simulation results, the parameters of the induction coil are adjusted; if it is found that the magnetic field distribution is uneven, resulting in the difference in charging efficiency between the center and edge of the charging area being greater than the set threshold, the spacing between the induction coils is adjusted to make the magnetic field distribution more uniform;

[0022] According to the parameters optimized by simulation, induction coil samples are manufactured and the performance of the induction coil is tested.

[0023] Preferably, the temperature control system is based on a PID control algorithm, collects data from the temperature sensor array in real time, calculates the temperature deviation of each area of ​​the blackbody radiation panel, adjusts the output power of the power supply, and achieves temperature uniformity control within 1 degree Celsius.

[0024] Preferably, the cooling module comprises a refrigeration plate, and the black body radiation plate is cooled by introducing a refrigerant into the refrigeration plate.

[0025] Preferably, the refrigeration plate adopts an integrated inner channel cold plate structure.

[0026] Preferably, the temperature sensor array is evenly distributed on the surface of the blackbody radiation panel.

[0027] A non-contact induction temperature control device for a very large black body provided by the present invention comprises a vacuum chamber and the non-contact induction heating device for a very large black body located in the vacuum chamber.

[0028] According to a non-contact induction heating method for a very large black body provided by the present invention, the temperature of a black body radiation plate is controlled by using the non-contact induction heating device for a very large black body.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention is suitable for vacuum environment and has the advantages of high precision, high uniformity, easy maintenance, high reliability, etc., and can meet the strict requirements of spacecraft calibration tests.

[0031] 2. The present invention monitors the temperature of the blackbody surface in real time through a temperature sensor array evenly distributed on the surface of the blackbody radiation plate, and adjusts the output power of the power supply according to the feedback of the temperature sensor array through the temperature control device to achieve precise control of the temperature of the blackbody radiation plate.

[0032] 3. The cooling device in the present invention is an integrated inner groove cold plate structure. By introducing a refrigerant, such as liquid nitrogen, liquid helium, etc., into the cold plate, the radiation plate can be quickly cooled down. It can be used for temperature control of a blackbody calibrator to achieve temperature uniformity of the blackbody radiation plate and meet the temperature requirements of the calibration test at a certain temperature.

[0033] 4. The present invention uses an electric mechanical device to move the induction coil module of the non-contact heating device, accurately controls the distance between the induction coil module and the blackbody radiation plate, thereby regulating the temperature of the blackbody radiation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0035] Figure 1 It is a schematic diagram of the working process of the non-contact induction heating device;

[0036] Figure 2 Simulate and design an optimized flow chart for non-contact induction heating devices;

[0037] Figure 3 Temperature distribution diagram after optimization design.

[0038] Figure 4 Schematic diagram of the induction coil. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0040] The purpose of the present invention is to provide a non-contact induction heating device for ultra-large black bodies, which can use electromagnetic induction heating technology in a vacuum environment to uniformly heat ultra-large (area greater than or equal to 5 square meters) black body radiation panels, and control the heating accuracy within 1 degree Celsius. The device is suitable for vacuum environments and has the advantages of high precision, high uniformity, easy maintenance, high reliability, etc., and can meet the strict requirements of spacecraft calibration tests.

[0041] Specifically, a non-contact induction heating device for ultra-large black body provided by the present invention comprises: an induction coil module, an induction coil power supply, a temperature sensor array, a temperature control device, a cooling module, and an electric mechanical device;

[0042] The induction coil module is arranged on the back of the black body radiation plate and heats the black body radiation plate by electromagnetic induction;

[0043] Induction coil power supply, providing medium frequency and high frequency current for the induction coil module;

[0044] The temperature sensor array is evenly distributed on the surface of the blackbody radiation plate and is used to monitor the temperature of the blackbody surface in real time;

[0045] The temperature control device adjusts the output power of the power supply according to the feedback of the temperature sensor array to achieve precise control of the temperature of the blackbody radiation panel;

[0046] The cooling module controls the temperature of the blackbody radiation panel through liquid nitrogen, liquid helium and other media to meet the temperature uniformity requirements of the blackbody radiation panel under low temperature conditions.

[0047] An electric mechanical device is used to move the non-contact heating device and accurately control its distance from the blackbody radiation plate. The heating efficiency and the temperature uniformity of the blackbody radiation plate can be adjusted by changing the distance.

[0048] More specifically, the induction coil module uses multiple layers of spiral coils with different diameters and spacings, and the coil spacing and shape are optimized. The specific process of the optimization design is as follows:

[0049] Establish a blackbody structure model;

[0050] Establish a physical model of the induction coil. For multi-layer spiral coils, factors such as magnetic field coupling, self-inductance and mutual inductance between different layers need to be considered;

[0051] Set boundary conditions, material properties, etc., including blackbody materials, dimensions, boundary constraints, etc., and the effects of the induction coil diameter, number of turns, coil spacing, etc. on performance. For example, increasing the diameter of the induction coil can increase the magnetic flux, but it may also increase the distribution range of the magnetic field, resulting in energy loss. Increasing the number of turns will increase the induced electromotive force, but it will also increase the resistance of the coil and generate more heat loss;

[0052] Use simulation software to simulate the induction coil. Set the coil's geometry, material properties (conductivity, magnetic permeability), and excitation source (current frequency, amplitude). Then simulate performance indicators such as magnetic field distribution, induced electromotive force, and power loss.

[0053] Adjust the coil parameters based on the simulation results. If you find that the magnetic field distribution is uneven, resulting in a large difference in charging efficiency between the center and edge of the charging area, you can adjust the coil spacing to make the magnetic field distribution more uniform;

[0054] According to the parameters optimized by simulation, induction coil samples are manufactured and the performance of the induction coil is tested.

[0055] Furthermore, the temperature control system collects data from the temperature sensor array in real time based on a PID control algorithm, calculates the temperature deviation of each area of ​​the blackbody radiation panel, adjusts the output power of the power supply, and achieves temperature uniformity control within 1 degree Celsius.

[0056] like Figure 3 As shown, the left picture is the temperature field of the ultra-large black body when the set temperature is -100°C, and the right picture is the temperature field of the ultra-large black body when the set temperature is 50°C.

[0057] according to Figure 3 It can be seen that when the set temperature is -100℃, the temperature range of the ultra-large black body is -100±0.7℃, indicating that the patented design can ensure the temperature uniformity of the ultra-large black body in the low temperature area; when the set temperature is 50℃, the temperature range of the ultra-large black body is 50±0.3℃, indicating that the patented design can ensure the temperature uniformity of the ultra-large black body in the medium and high temperature areas.

[0058] In a preferred embodiment, the non-contact induction heating device of the present invention is used to heat a black body radiation plate (2.5 meters long and 2 meters wide), and the temperature of the radiation plate is set to 30°C.

[0059] Device installation: Install the black body radiation panel and induction coil module on the track of the vacuum container.

[0060] The induction heating device is moved by an electric mechanical device to adjust the distance between the induction coil module and the black body radiation plate to 5 cm.

[0061] In the vacuum container, connect the blackbody radiation board, the power supply of the induction coil module, the signal data cable, etc. Start the vacuum pump, and the vacuum degree is better than 1.3×10 -3 Pa.

[0062] The output power of the induction coil module is dynamically adjusted according to the instruction of the temperature control device.

[0063] The temperature sensor array monitors the surface temperature of the blackbody radiation panel in real time and transmits the data to the temperature control device. The test results show that the surface evaluation temperature of the blackbody radiation panel is 30°C, and the uniformity is controlled within ±1°C, which meets the requirements of high-precision testing.

[0064] In another preferred embodiment, the non-contact induction heating device of the present invention is used to cool a black body radiation plate (2.5 meters long and 2 meters wide) from 30°C to -40°C.

[0065] The induction heating device is moved by an electric mechanical device to adjust the distance between the induction coil module and the black body radiation plate to 7.5 cm.

[0066] Reduce or stop the output power of the induction heating device;

[0067] The cooling module is started and liquid nitrogen or other refrigerants are introduced to cool the radiation plate.

[0068] When the temperature of the cooling module drops to -55°C, turn off the cooling device;

[0069] Adjust the output power of the induction heating device.

[0070] The output power of the induction coil module is dynamically adjusted according to the instruction of the temperature control device.

[0071] The temperature sensor array monitors the surface temperature of the blackbody radiation panel in real time and transmits the data to the temperature control device. The test results show that the surface evaluation temperature of the blackbody radiation panel is -40°C, and the uniformity is controlled within ±1°C, which meets the requirements of high-precision testing.

[0072] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A non-contact induction heating device for ultra-large black body, characterized in that: include: Induction coil module: set on the back of the blackbody radiation plate, heating the blackbody radiation plate through electromagnetic induction; Temperature sensor array: evenly distributed on the surface of the blackbody radiation panel, used to monitor the temperature of the blackbody surface in real time; Temperature control device: According to the feedback from the temperature sensor array, the output power of the power supply of the induction coil module is adjusted to realize the control of the temperature of the black body radiation plate; Cooling module: It cools down the temperature of the blackbody radiation plate through the flowing medium, and regulates the temperature of the blackbody radiation plate together with the induction coil module.

2. The non-contact induction heating device for ultra-large black body according to claim 1, characterized in that: Also includes: Electric mechanical device: used to move the induction coil module, control the distance between the induction coil module and the blackbody radiation plate, and regulate the heating efficiency and the temperature uniformity of the blackbody radiation plate by changing the distance.

3. The non-contact induction heating device for ultra-large black body according to claim 1, characterized in that: The induction coil module adopts multiple layers of spiral coils with different diameters and different spacings.

4. The non-contact induction heating device for ultra-large black body according to claim 3, characterized in that: The induction coil module is obtained in the following manner: Establish a blackbody structure model; Establish a physical model of the induction coil; Through simulation software, the induction coil is simulated; by setting the geometric shape, material properties, and excitation source of the induction coil, the magnetic field distribution, induced electromotive force, and power loss performance indicators are simulated; among which, the material properties include conductivity and magnetic permeability, and the excitation source includes current frequency and amplitude; According to the simulation results, the parameters of the induction coil are adjusted; if it is found that the magnetic field distribution is uneven, resulting in the difference in charging efficiency between the center and edge of the charging area being greater than the set threshold, the spacing between the induction coils is adjusted to make the magnetic field distribution more uniform; According to the parameters optimized by simulation, induction coil samples are manufactured and the performance of the induction coil is tested.

5. The non-contact induction heating device for ultra-large black body according to claim 1, characterized in that: The temperature control system is based on a PID control algorithm, collects data from a temperature sensor array in real time, calculates the temperature deviation of each area of ​​the blackbody radiation panel, and adjusts the output power of the power supply to achieve temperature uniformity control within 1 degree Celsius.

6. The non-contact induction heating device for ultra-large black body according to claim 1, characterized in that: The cooling module comprises a refrigeration plate, and the black body radiation plate is cooled by introducing a refrigerant into the refrigeration plate.

7. The non-contact induction heating device for ultra-large black body according to claim 6, characterized in that: The refrigeration plate adopts an integrated inner channel cold plate structure.

8. The non-contact induction heating device for ultra-large black body according to claim 1, characterized in that: The temperature sensor array is evenly distributed on the surface of the blackbody radiation plate.

9. A non-contact induction temperature control device for ultra-large black bodies, characterized in that: The invention comprises a vacuum chamber, and the non-contact induction heating device for ultra-large black body according to any one of claims 1 to 8 located in the vacuum chamber.

10. A non-contact induction heating method for ultra-large black body, characterized in that: The non-contact induction heating device for ultra-large black body according to any one of claims 1 to 8 is used to control the temperature of the black body radiation plate.

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