A heating circuit and heating device for a curved blackbody radiation source

Abstract

This application provides a heating circuit and heating device for a curved blackbody radiation source. The heating circuit includes: a heating device connected to a relay for generating a heating current based on the relay current; a temperature sensor connected to the heating device for acquiring the temperature of the heating device; a temperature control system connected to the temperature sensor for generating a control signal based on the temperature; and a relay connected to the temperature control system for generating different relay currents based on the control signal. The heating current is converted into thermal energy by the heating device to heat the curved blackbody. This ensures that the heating of the spherical blackbody is as uniform as possible, and since the heating device can control the heating process according to the temperature control system, it ensures convenient and quick heating of the spherical blackbody under repeated heating conditions.

Description

Technical Field

[0001] This application belongs to the field of blackbody heating, and particularly relates to a heating circuit and heating device for a curved blackbody radiation source. Background Technology

[0002] In thermal imaging systems, due to the influence of lens optics, images often appear brighter in the center and darker in the four corners. Our thermal imagers typically employ a two-point calibration process during manufacturing to address this imaging issue. Two-point calibration requires two blackbodies at different temperatures. The blackbodies used for two-point calibration need to have a very uniform temperature across their target surfaces.

[0003] In applications requiring thermal imagers with a wide field of view, conventional planar black bodies cannot meet the requirements during the production process. A common practice is to use a specially made hemispherical metal structure, which is first placed in a high-temperature chamber and heated evenly. Then, the heated hemispherical metal structure is removed from the high-temperature chamber, and two-point calibration processes need to be completed before the hemispherical metal structure cools down.

[0004] Heating hemispherical metal components in a high-temperature chamber results in slow temperature control, requiring over 15 minutes each time. After removal from the chamber, the temperature of the hemispherical blackbody continuously decreases, making it difficult to control its actual temperature. This method of heating spherical blackbodies in a high-temperature chamber is not only inefficient but also fails to guarantee environmental consistency during the two-point calibration process, thus failing to meet the demands of mass production. Summary of the Invention

[0005] The main objective of this invention is to provide a heating circuit and heating device for a curved blackbody radiation source, which can ensure that the heating of the spherical blackbody to be heated is as uniform as possible. At the same time, since the heating device can control the heating process according to the temperature control system, it ensures that the heating of the spherical blackbody is convenient and quick in repeated heating situations.

[0006] In a first aspect, a heating circuit for a curved blackbody radiation source is provided. The heating circuit includes: a heating device connected to a relay for generating a heating current based on the relay current generated by the relay; a temperature sensor connected to the heating device for acquiring the temperature of the heating device; a temperature control system connected to the temperature sensor for generating a control signal based on the temperature; and a relay connected to the temperature control system for generating different relay currents based on the control signal. The heating current is used to convert the heating device into thermal energy to heat the curved blackbody.

[0007] In one possible implementation, the heating device is a small ceramic heating element or a flexible heating element.

[0008] In another possible implementation, the relay is a solid-state relay.

[0009] In a second aspect, a heating device for a curved blackbody radiation source is provided. The heating device is used to heat the curved blackbody radiation source through a heating circuit as described in the first aspect. The heating device includes a heat-conducting seat (2) and a heat-transfer seat (3) stacked sequentially. Both the heat-conducting seat (2) and the heat-transfer seat (3) are concave structures. The blackbody radiation source (4) is embedded in the concave structure of the heat-transfer seat (3). The convex surface of the heat-conducting seat (2) is connected to a heating module. The heating module transfers heat to the heat-conducting seat (2), the heat-transfer seat (3), and the blackbody radiation source (4) sequentially.

[0010] In another possible implementation, the housing (1) is further included, and a cover plate (5) is fitted onto the port of the housing (1). The heat-conducting seat (2) is embedded in the port of the housing (1). The cover plate (5) covers the extended frame of the heat-conducting seat (2), the heat transfer seat (3), and the blackbody radiation source (4). A perforation is provided in the middle of the cover plate (5), which allows the concave surface of the blackbody radiation source (4) to be open to the outside.

[0011] In another possible implementation, the inner diameter of the heat-conducting seat (2) is larger than the outer diameter of the heat transfer seat (3), such that when the heat transfer seat (3) is embedded in the inner cavity of the heat-conducting seat (2), a first filling gap (8) is formed between the heat-conducting seat (2) and the heat transfer seat (3).

[0012] In another possible implementation, the first filling gap (8) is filled with a flexible medium, so that the heat-conducting seat (2) and the heat-transfer seat (3) are in thermal contact.

[0013] In another possible implementation, the inner diameter of the heat transfer seat (3) is larger than the outer diameter of the blackbody radiation source (4), such that when the blackbody radiation source (4) is embedded in the inner cavity of the heat transfer seat (3), a second filling gap (9) is formed between the heat transfer seat (3) and the blackbody radiation source (4); the filling medium in the second filling gap (9) is a particulate medium.

[0014] In another possible implementation, a gap is provided between the heat-conducting seat (2), the heat-transfer seat (3), and the blackbody radiation source (4). The gap includes a first filling gap (8) and a second filling gap (9). The gap width is the same at all points in the first filling gap (8), and the gap width is the same at all points in the second filling gap (9).

[0015] In another possible implementation, the heat-conducting base (2) has a plurality of side cut surfaces (21) circumferentially formed on its outer convex surface, and a bottom cut surface (22) is formed at the bottom of the heat-conducting base (2). The plurality of side cut surfaces (21) are evenly distributed around the bottom cut surface (22). The heating module includes a first heating module (6) and a second heating module (7). The first heating module (6) is mounted on the circumferentially formed side cut surface (21), and the second heating module (7) is mounted on the bottom cut surface (22). The heating elements of the first heating module (6) and the second heating module (7) are both attached to the cut surface of the heat-conducting base (2). Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0017] Figure 1 This is a structural diagram of a heating device for heating a spherical blackbody according to an embodiment of the present invention;

[0018] Figure 2 An exploded view of a heating device for a curved blackbody radiation source according to an embodiment of the present invention;

[0019] Figure 3 A main body diagram of a heating device for a curved blackbody radiation source provided in an embodiment of the present invention;

[0020] Figure 4 A cross-sectional view of a heating device for a curved blackbody radiation source provided in an embodiment of the present invention;

[0021] Figure 5 A cross-sectional view of the heat-conducting structure of a heating device for a curved blackbody radiation source provided in an embodiment of the present invention;

[0022] Figure 6 A cross-sectional view of the heating module of a heating device for a curved blackbody radiation source provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the dielectric filling of a heating device for a curved blackbody radiation source according to an embodiment of the present invention;

[0024] Figure 8 The bottom view of the heating device for a curved blackbody radiation source provided in an embodiment of the present invention.

[0025] In the diagram: 1. Housing; 2. Heat-conducting base; 3. Heat transfer base; 4. Blackbody radiation source; 5. Cover plate; 6. First heating module; 7. Second heating module; 8. First filling gap; 9. Second filling gap; 10. Infrared module; 11. Front plate; 12. Heat sink; 13. Back plate; 14. Operation panel; 15. Base plate; 16. Temperature sensor; 17. Fuse; 21. Side section; 22. Bottom section; 31. Filling hole; 61. Heat insulation plate; 62. Side heating element; 63. Fixing plate; 71. Fixing plate; 72. Bottom heating element; 121. Cooling fan; 131. Relay; 132. Switching power supply; 141. Control switch; 142. Temperature controller.

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting the invention.

[0027] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, modules, components, and / or groups thereof. It should be understood that when we say a module is “connected” or “coupled” to another module, it can be directly connected or coupled to the other module, or there may be an intermediate module. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any of the modules and all combinations thereof of one or more associated listed items.

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the implementation of this application will be described in further detail below with reference to the accompanying drawings.

[0029] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0030] like Figure 1 The diagram shown is a structural diagram of a heating circuit for a curved blackbody radiation source according to an embodiment of the present invention. The heating circuit includes:

[0031] A heating device 102 connected to a relay for generating a heating current based on the relay current generated by the relay; a temperature sensor 103 connected to the heating device for acquiring the temperature of the heating device; a temperature control system 104 connected to the temperature sensor for generating a control signal based on the temperature; and a relay 101 connected to the temperature control system for generating different relay currents based on the control signal. The heating current is used to convert the heating device into thermal energy to heat the curved blackbody.

[0032] In this embodiment of the invention, the heating device mainly includes: a relay, a heating device, a temperature sensor, and a temperature control system. During the specific heating process, the heating device generates heat energy after being powered on to heat the curved blackbody radiation source. The temperature sensor connected to the heating device collects the temperature of the heating device in real time and sends this temperature to the temperature control system. The temperature control system generates a control signal based on the acquired temperature and sends this control signal to the relay. The relay controls its own generated relay current according to the control signal, thereby controlling the heating current generated by the heating device. The magnitude of the heating current directly affects the heat generated by the heating device, thus achieving control over the heating of the curved blackbody radiation source.

[0033] Solid-state relays were chosen because their long lifespan provides high reliability for the temperature control system. Furthermore, their high operating frequency allows for more frequent temperature control of the heating element, resulting in better temperature control performance. The temperature sensor used is a high-linearity, high-stability PT100 platinum resistance thermometer.

[0034] The heating element is a small ceramic heating element with high thermal conductivity, or a flexible heating element.

[0035] In this embodiment of the invention, the ceramic heating element is a rigid heating element whose shape cannot be changed. Therefore, the ceramic heating element needs to be made as small as possible to ensure that a large number of small ceramic heating elements can completely cover the curved blackbody radiation source. Unlike the ceramic heating element, the flexible heating element, because its shape can be changed, can adhere well to the surface of the spherical blackbody to be heated. However, the flexible heating element has poor thermal conductivity. This application provides two options for the heating element, which can be selected according to specific application needs.

[0036] In this embodiment of the invention, the heating device generates heat energy to heat the curved blackbody radiation source after being powered on. A temperature sensor connected to the heating device collects the temperature of the heating device in real time and sends the temperature to the temperature control system. The temperature control system generates a control signal based on the acquired temperature and sends the control signal to a relay. The relay controls its own generated relay current according to the control signal, thereby controlling the heating current generated by the heating device. The magnitude of the heating current directly affects the heat generated by the heating device, thus achieving control over the heating of the curved blackbody radiation source. This ensures that the heating of the spherical blackbody is as uniform as possible. At the same time, since the heating device can control the heating process according to the temperature control system, it ensures convenience and speed in repeated heating of the spherical blackbody.

[0037] like Figure 2 The diagram shown is a structural diagram of a heating device for a curved blackbody radiation source according to an embodiment of the present invention. The heating device includes:

[0038] The heat-conducting base 2, heat-transfer base 3, and blackbody radiation source 4 are stacked in sequence. The heat-conducting base 2, heat-transfer base 3, and blackbody radiation source 4 are all concave structures. The concave surface of the blackbody radiation source 4 is curved. The gap between the heat-transfer base 3 and the heat-conducting base 2 and the blackbody radiation source 4 is filled with a heat transfer medium, which includes flexible medium and particulate medium.

[0039] In the embodiments of this application, the gap can be provided in multiple layers. In this application, a two-layer gap is used as an example for explanation. A first filling gap 8 is provided between the heat conduction seat 2 and the heat transfer seat 3. The filling medium in the first filling gap 8 is a flexible medium that can conduct heat. A second filling gap 9 is provided between the heat transfer seat 3 and the blackbody radiation source 4. The filling medium in the second filling gap 9 is a fine particulate medium that can conduct heat.

[0040] As is necessary, a heating module is provided on the outer convex surface of the heat-conducting base 2. The gap between the heat-conducting base 2 and the blackbody radiation source 4 is uniformly filled with a solid filling medium that can conduct heat, so that the heat of the heating module can be uniformly transferred to the blackbody radiation source 4, thereby heating the blackbody radiation source 4.

[0041] In this application, the heat-conducting base 2, the heat-transfer base 3, and the blackbody radiation source 4 are all concave structures. The blackbody radiation source 4 can be designed as a standard spherical concave structure according to actual needs, with the concave surface being a smooth curved surface. For large-field-of-view modules with high temperature measurement accuracy requirements, the concave curved surface can be spherical, ensuring good consistency between the field-of-view receiving angle and the normal angle of the radiation surface unit, significantly improving the module's K-axis performance. For large-field-of-view modules with lower temperature measurement accuracy, the concave curved surface can be aspherical, effectively reducing the product's thickness dimension while still meeting the K-axis performance requirements of the large-field-of-view module, thus reducing product volume and cost.

[0042] In the embodiments of this application, a spherical surface with a curved surface as the standard is used as an example for illustration. Correspondingly, the main structure of the heat transfer seat 3 and the blackbody radiation source 4 is a concave hemispherical shell structure, and the heat conduction seat 2 has a concave hemispherical cavity for aligning and accommodating the heat transfer seat 3. The convex structure of the heat conduction seat 2 can be cut to facilitate the installation and fixing of the standard heating module.

[0043] In this application, there is a gap between the heat-conducting base 2 and the blackbody radiation source 4. The gap can be filled with a solid filling medium that can conduct heat, so that the heat of the heating module located on the outer convex surface of the heat-conducting base 2 can be stably, effectively and uniformly transferred to the blackbody radiation source 4, thereby heating the blackbody radiation source 4.

[0044] Based on the stacked structure of the heat-conducting base 2, heat transfer base 3, and blackbody radiation source 4 of this application, the outer edge of the heat-conducting base 2 can extend horizontally to form a heat-conducting frame to facilitate the installation and fixation of the heat-conducting base 2; the outer edge of the heat transfer base 3 can extend horizontally to form a heat transfer frame, which overlaps and is fixed on the heat-conducting frame, so that the heat transfer base 3 can be aligned and installed inside the heat-conducting base 2; the outer edge of the blackbody radiation source 4 can extend horizontally to form a fixing frame, which overlaps and is fixed on the heat transfer frame, so that the blackbody radiation source 4 can be aligned and installed inside the heat transfer base 3.

[0045] In one specific embodiment, the heat-conducting base 2 can be embedded in the housing 1. The housing 1 has a four-sided enclosed and bottom-sealed structure. The heat-conducting base 2 is embedded from the upper port. The heat-conducting frame can be designed to fit the size of the upper port so that the heat-conducting frame and the four side walls of the housing 1 can be fixedly installed by right-angle connectors.

[0046] Furthermore, a cover plate 5 is provided at the upper port of the housing 1 to cover the frame area of ​​the heat-conducting base 2. For example, the cover plate 5 can completely cover the extended frame of the heat-conducting base 2, the heat transfer base 3, and the blackbody radiation source 4; a perforation is provided in the center of the cover plate 5, aligned with the curved surface of the blackbody radiation source 4, allowing the concave curved surface of the blackbody radiation source 4 to be directly exposed. That is, the infrared module 10 can be directly inserted / removed.

[0047] The basic conditions for setting the above-mentioned gaps are met between the heat-conducting seat 2 and the heat-transfer seat 3, and between the heat-transfer seat 3 and the blackbody radiation source 4. Therefore, in the embodiments of this application, the gaps are set at these two locations as examples for illustration.

[0048] In one specific embodiment, the gap may include a first filling gap 8 and a second filling gap 9. The first filling gap 8 is located between the heat-conducting base 2 and the heat-transfer base 3, and the second filling gap 9 is located between the heat-transfer base 3 and the blackbody radiation source 4. Preferably, the gap widths at various points within the first filling gap 8 are substantially the same, and the gap widths at various points within the second filling gap 9 are substantially the same.

[0049] Specifically, the inner diameter (recessed size) of the heat-conducting seat 2 is larger than the outer diameter (convex size) of the heat transfer seat 3. Taking the spherical shell structure as an example, the radius of the recessed cavity of the heat-conducting seat 2 is slightly larger than the radius of the convex structure of the heat transfer seat 3, so that when the convex structure of the heat transfer seat 3 is aligned and embedded in the inner cavity of the heat-conducting seat 2, a first filling gap 8 can be formed between the heat-conducting seat 2 and the heat transfer seat 3. The first filling gap 8 is filled with a solid filling medium that can transfer heat.

[0050] The filling medium within the first filling gap 8 is a flexible medium, allowing for sufficient thermal contact between the heat-conducting base 2 and the heat-transfer base 3. The flexible medium may include thermally conductive putty or gel-like silicone grease, etc. Relying on the flexibility of the medium, sufficient thermal contact between the heat-conducting base 2 and the heat-transfer base 3 can be guaranteed, ensuring stable heat transfer performance.

[0051] Specifically, the inner diameter (recessed dimension) of the heat transfer seat 3 is larger than the outer diameter (convex dimension) of the blackbody radiation source 4. Taking a spherical shell structure as an example, the radius of the recessed cavity of the heat transfer seat 3 is slightly larger than the radius of the convex structure of the blackbody radiation source 4. This allows a second filling gap 9 to be formed between the heat transfer seat 3 and the blackbody radiation source 4 when the convex structure of the blackbody radiation source 4 is aligned and embedded in the inner cavity of the heat transfer seat 3. The second filling gap 9 is filled with a solid filling medium capable of heat transfer. The filling medium in the second filling gap 9 is a fine particulate medium. The fine particulate medium may include salt or sand, etc. Such media have excellent heat preservation effects, and the fine particulate nature can ensure the uniformity of contact between the filling medium and the blackbody radiation source 4, thereby ensuring the thermal uniformity of the surface (concave surface) of the blackbody radiation source 4.

[0052] In this application, the filling gap can be closed by extending the frame. The heat transfer frame is fixedly installed on the heat conduction frame, and the heat transfer frame can completely cover the upper port of the first filling gap 8, so that when the heat transfer base 3 is aligned and installed in the heat conduction base 2, the first filling gap 8 can be closed. The outer edge of the blackbody radiation source 4 extends horizontally to form a fixed frame, and the heat transfer frame has a groove for fitting and installing the fixed frame, so that when the blackbody radiation source 4 is aligned and installed in the heat transfer base 3, the fixed frame can close the second filling gap 9.

[0053] Based on the distribution characteristics of the filling gaps in this application, the blackbody radiation source 4 can be fixedly installed to the heat transfer frame on the heat transfer base 3 through the screw holes on the fixed frame to form a radiation assembly. The heat transfer base 3 has a filling hole 31 near the heat transfer frame, through which the medium can be filled into the second filling gap 9. After filling is completed, the filling hole 31 can be sealed. The sealing method can be selected according to the actual situation, such as glue with sealing block, thread with sealing bolt, etc.

[0054] Before fixing the radiating component to the heat-conducting base 2, a layer of flexible medium of uniform thickness can be radiated onto the inner cavity of the heat-conducting base 2. Then, the radiating component is aligned and installed on the heat-conducting base 2. It is understood that both the heat-conducting base 2 and the heat transfer base 3 can be made of hard alloy material. When filling the flexible medium, appropriate pressure can be applied to ensure uniform application of the flexible medium. Finally, the cover plate 5 can be placed on top of the radiating component and fixed with screws.

[0055] Based on the stacked structure of this application, the heat-conducting base 2, the heat transfer base 3, and the blackbody radiation source 4 can be coaxially aligned. Coaxial alignment can be achieved through positioning holes on their respective extended frames, thereby ensuring that the width of each filling gap is basically the same. For example, the heat-conducting frame can be fixedly installed with the housing 1 to maintain a horizontal posture; positioning holes are provided on the heat-conducting frame to cooperate with positioning holes on the heat transfer frame, thereby achieving alignment between the heat transfer base 3 and the heat-conducting base 2; an annular groove can be provided on the heat transfer frame of the heat transfer base 3 so that the fixing frame of the blackbody radiation source 4 can be installed in the groove, thereby achieving alignment between the heat transfer base 3 and the blackbody radiation source 4.

[0056] In this application, the heating source of the blackbody radiation source 4 is located on the outer convex surface of the heat conduction base 2. In order to facilitate efficient contact heat conduction, the curved outer convex surface is obviously not suitable for the existing planar heating plate structure. Therefore, in the embodiment of this application, the outer convex surface of the heat conduction base 2 is cut to form multiple planar heating areas so that the planar heating plate can be attached and used to provide good thermal contact and heat conduction.

[0057] In one specific embodiment, the heat-conducting base 2 has multiple side cut surfaces 21 circumferentially formed on its outer convex surface and a bottom cut surface 22 formed at its bottom. The multiple side cut surfaces 21 are evenly distributed around the bottom cut surface 22, such as... Figure 2 , Figure 8 As shown, the side cut surface 21 is inclined and the bottom cut surface 22 is horizontal. The heating module is installed in close contact with the cut surface, which allows the heating element of the heating module to be fixedly installed in close contact with the cut surface, resulting in stable heat transfer.

[0058] For example, the heating module may include a first heating module 6 and a second heating module 7, wherein the first heating module 6 is fixedly mounted on the side cut surface 21, and the second heating module 7 is fixedly mounted on the bottom cut surface 22. The heating elements of the first heating module 6 and the second heating module 7 are both attached to the cut surface of the heat-conducting base 2.

[0059] Specifically, the first heating module 6 includes a fixing plate 63, a side heating element 62, and a heat insulation plate 61, all attached to the side cut surface 21. The upper end of the fixing plate 63 extends to the lower side of the heat-conducting frame and is fixed thereon, while the lower end of the fixing plate 63 extends to the bottom cut surface 22 and is fixed thereon. The fixing plate 63 has an annular notch at the side cut surface 21. The side heating element 62 has an annular structure. The heat insulation plate 61 is fixedly installed on the outside of the fixing plate 63, allowing the heat insulation plate 61 to press the side heating element 62 into the notch, ensuring a tight fit with the side cut surface 21. A connection cable interface can be provided on the lower side of the annular notch for routing the wires of the side heating element 62. The heat insulation plate 61 and the connection cable interface do not interfere with each other.

[0060] The second heating module 7 includes a fixing plate 71 and a bottom heating element 72 that are attached to the bottom cut surface 22. The bottom heating element 72 has a ring structure. The fixing plate 71 is located on the outside and presses it tightly against the bottom cut surface 22. The fixing plate 71 is fixed to the bottom cut surface 22 by screws and does not conflict with the lower end of the fixing plate 63.

[0061] It is understandable that the rated power and rated voltage of the side heating element 62 and the bottom heating element 72 can be the same, but their dimensions may differ, which can be adjusted according to the actual cross-sectional size. The heat insulation plate 61 and the fixing plate 71 are made of high-temperature resistant plastic, usually bakelite, which can work for a long time at a high temperature of 300℃. The poor thermal conductivity of plastic can reduce heat loss from the heating element. The heating element can be a ceramic heating element, which heats up through electrical control, and the connection method is simply two wires connected to the circuit.

[0062] If necessary, the side heating element 62 can be aligned and attached to the weak point of the circumferential structure of the heat-conducting base 2, so that the heat transfer efficiency is faster and the filling medium is heated quickly.

[0063] Based on practical needs, the housing 1 may include a front plate 11, a heat sink 12, a back plate 13, an operation panel 14, and a bottom plate 15. These plates can be fixedly installed together using right-angle connectors to form a box-like structure. A cooling fan 121 is mounted on the heat sink 12, with its vent connected to the outside. A relay 131 and a switching power supply 132 are mounted on the back plate 13. A control switch 141 and a temperature controller 142 are mounted on the operation panel 14. The control switch 141 is embedded in the outer side of the operation panel 14, and the display section of the temperature controller 142 is located on the outer side of the operation panel 14. A fuse 17 is mounted on the heat-conducting frame of the heat-conducting base 2, located inside the housing 1. A temperature sensor 16 is mounted at the bottom of the heat-conducting base 2, electrically connected to the temperature controller 142, enabling the temperature controller 142 to process the feedback parameters from the temperature sensor 16 and display the corresponding temperature parameters.

[0064] In the embodiments of this application, the second filling gap 9 uses a granular filling medium. When heated, the thermal expansion effect can be eliminated within the second filling gap 9, without causing structural damage to the blackbody radiation source 4, and the integrity of the curved surface can be effectively guaranteed. If necessary, the surface of the blackbody radiation source 4 can be sandblasted and anodized to eliminate the influence of light reflection on the module.

[0065] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0066] The above description is only a partial implementation of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A heating device for a curved blackbody radiation source, characterized in that The heating device comprises a heating circuit and heat-conducting seat (2) and heat-conducting seat (3) installed in sequence, and the heating circuit comprises a heating device connected with a relay for generating a heating current according to a relay current generated by the relay, a temperature sensor connected with the heating device for collecting the temperature of the heating device, a temperature control system connected with the temperature sensor for generating a control signal according to the temperature, and a relay connected with the temperature control system for generating different relay currents according to the control signal, and the heating current is used for converting into thermal energy for heating the curved black body by the heating device; The heat-conducting seat (2) and the heat-conducting seat (3) are both concave structures, and the black body radiation source (4) is embedded in the concave structure of the heat-conducting seat (3); the convex surface of the heat-conducting seat (2) is connected with a heating module, and the heating module sequentially transfers heat to the heat-conducting seat (2), the heat-conducting seat (3) and the black body radiation source (4). Wherein, the first filling gap (8) is formed between the heat-conducting seat (2) and the heat-conducting seat (3), and the flexible medium is filled in the first filling gap (8); the second filling gap (9) is formed between the heat-conducting seat (3) and the black body radiation source (4), and the granular medium is filled in the second filling gap (9).

2. The heating device of claim 1, wherein The heating device is a small ceramic heating sheet or a flexible heating sheet.

3. The heating device of claim 1, wherein, The relay is a solid-state relay.

4. The heating device of claim 1, wherein, It also comprises a shell (1) and a cover plate (5) covering the port of the shell (1), the heat-conducting seat (2) is embedded in the port of the shell (1), and the extension frame of the heat-conducting seat (2), the heat-conducting seat (3) and the black body radiation source (4) is covered around the cover plate (5); a through hole is formed in the middle of the cover plate (5), and the concave surface of the black body radiation source (4) is opened outward through the through hole.

5. The heating device of claim 4, wherein The inner diameter of the heat-conducting seat (2) is greater than the outer diameter of the heat-conducting seat (3), so that when the heat-conducting seat (3) is embedded in the inner cavity of the heat-conducting seat (2), the first filling gap (8) is formed between the heat-conducting seat (2) and the heat-conducting seat (3).

6. The heating device of claim 5, wherein, The first filling gap (8) is filled with flexible medium, so that the heat-conducting seat (2) and the heat-conducting seat (3) are in thermal contact.

7. The heating device of claim 4, wherein The inner diameter of the heat-conducting seat (3) is greater than the outer diameter of the black body radiation source (4), so that when the black body radiation source (4) is embedded in the inner cavity of the heat-conducting seat (3), the second filling gap (9) is formed between the heat-conducting seat (3) and the black body radiation source (4).

8. The heating device of claim 4, wherein, The heat-conducting seat (2), the heat-conducting seat (3) and the black body radiation source (4) are provided with a gap, and the gap comprises the first filling gap (8) and the second filling gap (9), the gap width of each part in the first filling gap (8) is the same, and the gap width of each part in the second filling gap (9) is the same.

9. The heating device of claim 1, wherein, The outer convex surface of the heat-conducting seat (2) is provided with a plurality of side cutting surfaces (21) in the circumferential direction, and the bottom of the heat-conducting seat (2) is provided with a bottom cutting surface (22), and the plurality of side cutting surfaces (21) are uniformly distributed around the bottom cutting surface (22); the heating module comprises a first heating module (6) and a second heating module (7), the first heating module (6) is installed on the circumferentially provided side cutting surface (21), the second heating module (7) is installed on the bottom cutting surface (22), and the heating fins of the first heating module (6) and the second heating module (7) are attached to the cutting surface of the heat-conducting seat (2).

Images