Excitation device and method for generating infrared radiation

Abstract

The present invention provides an excitation device and method for generating infrared radiation, the excitation device comprising: an excitation material body containing a first functional material and a second functional material, the first functional material being a magnetostrictive material, the second functional material being graphite or graphene, the excitation material body is designed to enable the magnetostrictive material to generate follow-up deformation under the action of an alternating electromagnetic field, and the follow-up deformation is used for generating alternate extrusion and stretching effects on the graphite or graphene so that the graphite or graphene can generate energy level transition to generate narrow-band infrared radiation; and meanwhile, vortex current generated by graphite or graphene under the action of an alternating electromagnetic field acts to generate broadband infrared radiation. According to the excitation device and method, broadband infrared radiation and narrowband infrared radiation are generated at the same time, the intensity and proportion of the two kinds of infrared radiation can be regulated and controlled in real time, and therefore the excitation device and method have wide application prospects in the directions of irradiation of organisms and materials, hidden transmission of information and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conversion, and in particular to an excitation device and method for generating infrared radiation. Background Art

[0002] Graphene, a two-dimensional thin film composed of hexagonally arranged carbon atoms, exhibits excellent electrical, thermal, and mechanical properties, making it a hot topic in the emerging materials field in recent years. Currently, graphene has been widely applied in many fields, such as electronics, catalysis, biomedicine, and sensors. Graphene's high carrier mobility, high optical transmittance, high specific surface area, and excellent mechanical strength make it an ideal candidate for infrared radiation, thus holding it in a promising field. Graphene is composed of multiple stacked layers of carbon atoms, each layer arranged in a hexagonal honeycomb pattern. The layers are held together by weak van der Waals forces, resulting in good intralayer conductivity but poor interlayer conductivity. Chemical treatment can break down these van der Waals forces and separate them into graphene, thus enabling graphite to exhibit good infrared radiation capabilities.

[0003] Currently, infrared radiation has specific and mature applications, primarily focusing on the thermal radiation generated by electricity. This type of infrared radiation, produced by conductive materials like graphene under certain conditions, has a spectrum similar to blackbody radiation. However, the thermal radiation effect of infrared radiation can easily increase the surface temperature of objects. Producing infrared radiation with a low-temperature rise in a safer manner remains an unresolved issue. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides an excitation device and method for generating infrared radiation, which can generate infrared radiation with wider application scenarios, safety and low temperature rise based on an excitation material that converts alternating electromagnetic energy into infrared radiation.

[0005] One aspect of the present invention provides an excitation device for generating infrared radiation, comprising: The excitation material body contains a first functional material and a second functional material, wherein the first functional material is a magnetostrictive material and the second functional material is graphite or graphene. The excitation material body is designed to cause the magnetostrictive material to produce a kinetic deformation under the action of an alternating electromagnetic field. The kinetic deformation is used to produce an alternating compression and stretching effect on the graphite or graphene, causing the graphite or graphene to undergo an energy level transition. The graphite or graphene is used to generate broadband infrared radiation and narrowband infrared radiation. The narrowband infrared radiation is infrared radiation generated by energy level transition.

[0006] In some embodiments of the present invention, the main body of the excitation material is a mixture containing a first functional material and a second functional material. The mixture achieves energy transfer with dynamic deformation through close contact between the first functional material and the second functional material to cause energy level transition.

[0007] In some embodiments of the present invention, the excitation material body is a solid block or solid particles.

[0008] In some embodiments of the present invention, the spectral line width of the broadband infrared radiation is greater than the spectral line width of the narrowband infrared radiation, and the wavelength bands corresponding to the broadband infrared radiation and the narrowband infrared radiation have overlapping portions.

[0009] In some embodiments of the present invention, the first functional material and the second functional material in the mixture are in powder form, and the particle sizes of the first functional material and the second functional material are below the micrometer level.

[0010] In some embodiments of the present invention, the excitation device further includes an electromagnetic excitation unit; the alternating electromagnetic field is generated by inputting an alternating current into the electromagnetic excitation unit; the electromagnetic excitation unit is an electromagnetic coil; and the excitation material body is used to be placed within the magnetic field coverage range of the electromagnetic coil.

[0011] In some embodiments of the present invention, when the frequency of the alternating current input to the electromagnetic excitation unit increases, the proportion of broadband infrared radiation decreases and the proportion of narrowband infrared radiation increases; When the intensity of the alternating current input to the electromagnetic excitation unit increases, the wavelength of the central spectrum line of the broadband infrared radiation moves toward a shorter wavelength and the spectrum line amplitude increases, while the amplitude of the narrowband infrared radiation increases while the spectrum line position remains unchanged.

[0012] In some embodiments of the present invention, when an alternating current containing more than two frequencies is input into an electromagnetic excitation unit, and the total power of the alternating currents of each frequency remains unchanged while the power ratio changes, when the power change of the broadband infrared radiation is small, the narrowband infrared radiation whose intensity changes greatly with the change of the power ratio is used to carry information to achieve covert transmission of information.

[0013] In some embodiments of the present invention, broadband infrared radiation is thermal radiation generated by eddy currents generated on graphite or graphene under the action of an alternating electromagnetic field.

[0014] Another aspect of the present invention provides an excitation method for generating infrared radiation, using the excitation device described in any of the above embodiments, the method comprising the following steps: Under the action of an alternating electromagnetic field, the graphite or graphene in the material body is excited to generate infrared radiation including broadband infrared radiation and narrowband infrared radiation; Among them, narrowband infrared radiation is generated by exciting the magnetostrictive material in the material body to produce a dynamic deformation under the action of an alternating electromagnetic field, which produces an alternating squeezing and stretching effect on graphite or graphene, causing energy level transitions in graphite or graphene.

[0015] This application proposes an excitation device and method for generating infrared radiation. Under the action of an alternating electromagnetic field, the comprehensive infrared radiation generated by the excitation material body is a superposition of broadband infrared radiation and narrowband infrared radiation. It has a lower temperature rise and has broad application prospects in the irradiation of organisms and materials and the covert transmission of information.

[0016] Additional advantages, objects, and features of the present invention will be set forth in part in the following description and will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by the structures particularly pointed out in the description and drawings.

[0017] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific descriptions, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. In the drawings: Figure 1 Schematic diagram of the structure of an excitation device in one embodiment of the present invention.

[0019] Figure 2 Schematic diagram of the mechanism of the excitation device in one embodiment of the present invention.

[0020] Figure 3 This is an example diagram of the spectrum of infrared radiation generated by the excitation device in one embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0022] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps closely related to the solutions according to the present invention, while other details that are not closely related to the present invention are omitted.

[0023] It should be emphasized that the term "include / comprises" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0025] At present, infrared radiation has its specific and mature application scenarios. Its application mainly focuses on the thermal radiation generated after power is applied. This type of infrared radiation is infrared radiation whose spectrum lines are similar to blackbody radiation produced by conductive materials such as graphene under certain conditions.

[0026] Based on this, in order to obtain infrared radiation with a wider range of application scenarios and low temperature rise, the present application creatively proposes an excitation device and method that can simultaneously generate infrared radiation including infrared radiation spectra excited by eddy currents and infrared spectra excited by material characteristic spectra.

[0027] In this application, for the convenience of writing, the infrared radiation similar to blackbody radiation generated by the work done by the eddy current of the conductor is referred to as broadband infrared radiation (i.e. Figure 2 The eddy current infrared radiation in the material is called narrow-band infrared radiation (i.e. Figure 2 transition infrared radiation in the

[0028] The present application can generate broadband infrared radiation and narrowband infrared radiation simultaneously through two different physical mechanisms, wherein narrowband infrared radiation can be excited by driving graphite or graphene to produce energy level transitions through an alternating electromagnetic field. The corresponding wavelength of this type of infrared radiation is fixed and is the characteristic spectrum of graphene; broadband infrared radiation is infrared thermal radiation generated by the eddy current generated under the same alternating electromagnetic field; furthermore, the peak position and intensity of the spectrum lines of these two infrared radiations can be controlled by adjusting the intensity of the alternating current, and the ratio of broadband infrared radiation to narrowband infrared radiation can be changed by regulating the frequency of the alternating current. Therefore, compared with the existing method of generating infrared radiation based only on the conductor commonality of the material, the excitation device and method proposed in this application have a wider range of application scenarios, such as realizing the irradiation of biochemical materials, safer biomedical irradiation, and the covert transmission of information.

[0029] Figure 1 FIG. 1 is a schematic diagram of an excitation device according to an embodiment of the present invention. Figure 1 As shown, the excitation device 100 for generating infrared radiation proposed in the present application includes an excitation material body 110 .

[0030] The excitation material body 110 in this application can be used to be excited by an alternating electromagnetic field to emit broadband infrared radiation and narrowband infrared radiation. Broadband infrared radiation is generated by the eddy currents generated in the conductor by the alternating electromagnetic field, generating work and heat, a common property of conductors. Narrowband infrared radiation is generated by the innovative excitation material body 110 proposed in this application. It is generated by transferring mechanical energy from the deformation of the magnetostrictive material to graphite or graphene, causing energy level transitions.

[0031] As an example, the material used to prepare the excitation material body 110 can be a mixture containing a magnetostrictive material and graphite, or the material used to prepare the excitation material body 110 can be a mixture containing a magnetostrictive material and graphene. That is, the excitation material body 110 is a mixture containing a first functional material and a second functional material, where the first functional material is a magnetostrictive material and the second functional material is graphite or graphene. The first functional material and the second functional material can be mixed in a predetermined ratio. Magnetostrictive materials are a type of material that can convert electromagnetic energy into mechanical energy. In this application, the magnetostrictive material used to prepare the excitation material body 110 can be nickel-based alloys, manganese-based alloys, iron-based alloys, ferrites, etc., but the present invention is not limited to this. Moreover, the mixing ratio of magnetostrictive material and graphene (or graphite) can also vary depending on the magnetostrictive material. The mixing ratio can be set based on the ability to simultaneously generate broadband infrared radiation and narrowband infrared radiation.

[0032] More specifically, in order to overcome the problems of infrared radiation generated by the existing method, the present application creatively designs an excitation material body 110 for simultaneously generating broadband infrared radiation and narrowband infrared radiation, such as Figure 2As shown, the generation method is as follows: under the excitation of an external alternating electromagnetic field, since the excitation material body 110 has the common property of being conductive, a follow-up eddy current can be generated based on the common property of the conductor, thereby causing the excitation material body 110 to generate broadband infrared radiation through a thermal effect. Among them, the follow-up eddy current refers to the eddy current that changes with the alternating change of the electromagnetic field; under the excitation of the external alternating electromagnetic field, the magnetostrictive material in the excitation material body 110 will undergo magnetostrictive deformation such as elongation or shortening in the magnetization direction or the perpendicular direction based on its magnetostrictive property (that is, the magnetostrictive material produces microscopic deformation in the particle structure). Based on the energy transfer mechanism, this deformation can be transferred to the graphite or graphene, causing the six-carbon ring planar honeycomb structure of the graphite or graphene to be mechanically stretched and squeezed alternately, thereby causing some C-C bonds in the graphite or graphene to undergo energy level transitions, generating narrowband infrared radiation. Given the time- and space-varying nature of alternating electromagnetic fields, the deformation of magnetostrictive materials under the influence of these fields can vary depending on the excitation. Therefore, this deformation can be referred to as kinetic deformation, meaning that the deformation of the magnetostrictive material follows the alternating electromagnetic field. Furthermore, the compression and tension exerted on graphite or graphene by this kinetic deformation also alternate, meaning that over time, the kinetic deformation continuously exerts alternating compression and tension on the graphite or graphene according to the kinetic deformation cycle. Based on the multiple excitation steps involved in narrowband infrared radiation, the cycle of the alternating current corresponds to the cycle of the alternating electromagnetic field, the cycle of the reciprocating motion of the magnetostrictive material, and the cycle of compression and tension on the graphite or graphene.

[0033] In some embodiments of the present invention, the excitation material body 110 may be in the form of a solid block, solid particles, or an aqueous / greasy form that can be condensed into a solid state. The solid state is a functional form that simultaneously generates broadband infrared radiation and narrowband infrared radiation. For example, when the excitation material body 110 is a solid block, it can be obtained by simply mixing particles of the first functional material and particles of the second functional material and pressing the mixed particles. Alternatively, the particles of the first functional material and the second functional material can be mixed and then the mixed materials can be formed into a block material using a binding material such as a gel. When the excitation material body 110 is a solid particle, the first functional material and the second functional material can be simply mixed and stacked, or particles of a magnetostrictive material and particles of graphene (or graphite) can be mixed so that each solid particle contains the first functional material and the second functional material. In addition, in addition to magnetostrictive materials and graphene (or graphite), the excitation material body 110 may also contain other materials as auxiliary materials for adjusting the mechanical, physical, chemical and / or electrical properties of the excitation material body 110, such as conductive materials or adhesive materials such as gel (the materials other than the first functional material and the second functional material in the excitation material body 110 can be collectively referred to as the third material), and the present invention does not specifically limit them.

[0034] Furthermore, to facilitate mixing of the first and second functional materials, the first and second functional materials used to prepare the excitation material body 110 can both be in powder form, and the magnetostrictive material and graphene (or graphite) can have comparable particle sizes. The term "equivalent particle sizes of the magnetostrictive material and graphene (or graphite)" used in this application refers to particles of both falling within a specific range, such as particles of both micrometers. The particle sizes of the magnetostrictive material and graphene (or graphite) mentioned above are merely examples, and this application does not impose specific limitations on particle size and shape. Furthermore, this application does not specifically limit the form of the first and second functional materials used to prepare the excitation material body 110 (which can be powders, aqueous dispersions, or oily dispersions, etc.); these are merely examples.

[0035] In addition, this application does not specifically limit the mixing method of the magnetostrictive material and graphene (or graphite). Existing solid material mixing technologies such as mechanical stirring mixing, wet mixing (e.g., using a volatile solvent to prepare a mixture of magnetostrictive material and graphene (or graphite), and drying to obtain a solid energy conversion structure) and chemical grafting can be used. Self-designed or improved methods can also be used. Furthermore, the magnetostrictive material and graphene (or graphite) in the excitation material body 110 need to be in close contact to achieve the process of transferring the mechanical energy generated by the magnetostrictive material to the graphene (or graphite). For example, the relatively independent magnetostrictive material and graphene (or graphite) can have a certain density to achieve energy transfer through compression and stretching between powder particles. For example, the mixture can achieve dynamic deformation energy transfer through a third material located between the first functional material and the second functional material. For another example, intermolecular interaction forces can exist between the magnetostrictive material and graphene (or graphite) in the excitation material body 110, achieving energy transfer through compression and stretching through these intermolecular interactions. The intermolecular interaction forces between the magnetostrictive material and the graphene (or graphite) can include chemical bonds and secondary bonds (secondary bonds include hydrogen bonds, van der Waals forces, and electrostatic Coulomb forces). In addition, the excitation material body 110 can be placed in a container without electromagnetic shielding function, or other holding, supporting or fixing methods can be used to keep it in a suitable functional position. This application does not specifically limit the placement method of the excitation material body 110.

[0036] In some embodiments of the present invention, since narrowband infrared radiation is generated when energy level transitions occur in the excitation material body 110, the spectral lines corresponding to the narrowband infrared radiation can be considered characteristic spectral lines of graphene or graphite; while the spectral lines corresponding to the broadband infrared radiation are similar to the spectral lines of blackbody radiation (this simply means that the spectral line shape of the broadband infrared radiation is similar to the spectral line shape of blackbody radiation). Moreover, the spectral lines corresponding to the narrowband infrared radiation and the broadband infrared radiation are both emission lines of the optical spectrum. In addition, the spectral lines corresponding to the broadband infrared radiation are in the infrared spectral range, while the spectral lines corresponding to the narrowband infrared radiation are in the far-infrared spectral range.

[0037] Furthermore, in addition to the excitation material body 110, the excitation device 100 of the present application may also include an electromagnetic excitation unit 120 for generating an alternating electromagnetic field. The electromagnetic excitation unit 120 serves as a load inlet for alternating electromagnetic energy. After being injected with external energy, it can generate an alternating electromagnetic field within and around it, thereby additionally exciting the excitation material body 110 with electromagnetic energy. Furthermore, the excitation material body 110 must be within the alternating electromagnetic field generated by the electromagnetic excitation unit 120 to be excited by the electromagnetic energy and generate infrared radiation. However, since the magnetic induction intensity varies at different locations within the alternating electromagnetic field, to ensure that the excitation of the alternating electromagnetic field fully affects the excitation material body 110, the excitation material body 110 can be placed in an area with a strong magnetic induction intensity within the alternating electromagnetic field generated by the electromagnetic excitation unit 120 (or, the excitation material body 110 can be located at a location within the alternating electromagnetic field generated by the electromagnetic excitation unit 120 where the magnetic induction intensity exceeds a set value; this application does not specifically limit the set value of the magnetic induction intensity). For example, the excitation material body 110 can be placed at the center of the electromagnetic excitation unit 120 to achieve a better infrared radiation effect. Because the excitation material body 110 contains magnetostrictive material, which is a soft magnetic material, placing the excitation material body 110 in an area with a strong magnetic induction density will significantly change the inductance of the electromagnetic excitation unit 120.

[0038] By way of example, the electromagnetic excitation unit 120 may be an electromagnetic coil, an electromagnet, or a transformer. For example, the electromagnetic coil may generate an alternating electromagnetic field through electromagnetic induction and an external current. This application does not limit the specific type of electromagnetic excitation unit 120. Taking the electromagnetic coil as an example, the electromagnetic excitation unit 120 may be an existing electromagnetic coil or a self-designed electromagnetic coil in a closed-shaped pattern. For example, the electromagnetic coil may be a planar coil or a three-dimensional coil. For example, the electromagnetic coil may be circular, elliptical, or polygonal in shape. This application does not specifically limit the shape and style of the electromagnetic coil. Furthermore, the electromagnetic excitation unit 120 may be connected to an external power source to utilize energy provided by the external power source to generate an alternating electromagnetic field (for example, the electromagnetic excitation unit 120 may generate an alternating electromagnetic field when excited by an alternating current input into the electromagnetic excitation unit 120). This application also allows devices other than an external power source to provide energy to the electromagnetic excitation unit 120 to generate an alternating electromagnetic field. In addition, if the electromagnetic excitation unit 120 is an electromagnetic coil, the excitation material body 110 can be placed within the magnetic field coverage of the electromagnetic coil to electromagnetically excite the excitation material body 110 .

[0039] In some embodiments of the present invention, if the electromagnetic excitation unit 120 generates an alternating electromagnetic field by inputting an alternating current, the spectral line amplitude and peak position of the broadband infrared radiation and the narrowband infrared radiation can be controlled by regulating the intensity of the alternating current input to the electromagnetic excitation unit 120, and the frequency of the alternating current input to the electromagnetic excitation unit 120 can be controlled to control the ratio of the broadband infrared radiation to the narrowband infrared radiation. Specifically, when the input alternating current has a lower frequency, the proportion of broadband infrared radiation is greater than that of narrowband infrared radiation; when the input alternating current has a higher frequency, the proportion of narrowband infrared radiation is greater than that of broadband infrared radiation, that is, as the frequency of the alternating current input to the electromagnetic excitation unit 120 increases, the proportion of broadband infrared radiation decreases and the proportion of narrowband infrared radiation increases. When the intensity of the input alternating current changes, the amplitude and spectral line position of the broadband infrared radiation also change: when the intensity of the alternating current input to the electromagnetic excitation unit increases, the change in the broadband infrared radiation conforms to the change law of blackbody radiation, that is, the central spectral line wavelength of the broadband infrared radiation moves toward a shorter wavelength and the spectral line amplitude increases, while for the narrowband infrared radiation, the amplitude increases while the spectral line position remains unchanged. Furthermore, the spectrum of narrowband infrared radiation is a characteristic spectrum of graphite / graphene emitted due to energy level transitions, and it has a fixed wavelength. By properly controlling the frequency and intensity of the alternating electromagnetic field, the position and amplitude of the broadband infrared radiation spectrum, the amplitude of the narrowband infrared radiation, and the ratio of broadband to narrowband infrared radiation can be effectively adjusted.

[0040] As an example, based on the aforementioned mechanism of generating infrared radiation, it can be seen that the excitation device of the present application can realize multiple energy excitations and conversions: the electromagnetic excitation unit can convert the input energy into an alternating electromagnetic field, and the first functional material (magnetostrictive material) in the excitation material body 110 of the present application is used to convert electromagnetic energy into mechanical energy, and the second functional material (graphite or graphene) is used to convert the mechanical energy transmitted by the first functional material into infrared radiation (including the conversion of mechanical energy into thermal energy and transition energy). Therefore, the broadband radiation and narrowband radiation mentioned in the present application are both generated by the second functional material.

[0041] The generation method of the above-mentioned narrow-band infrared radiation is derived from the principles of physics and chemistry, and its verification results can be obtained through Fourier spectrometer, liquid nitrogen cooling sensor or optical focusing. Specifically, Figure 3 This is an infrared radiation spectrum obtained by using a Fourier spectrometer to detect the infrared radiation generated by the excitation device of the present application (the vertical axis is a relative value). Under the excitation of alternating electromagnetic energy, the infrared radiation generated by the excitation device of the present application has special characteristics, such as Figure 3 As shown, at 1600cm -1A narrow-band emission line is superimposed on the left and right blackbody radiation lines. According to the data query, this is the G peak of the graphene infrared radiation line, with a wave number of 1580cm -1 , and the radiation energy intensity of the narrowband emission line is relatively high. Figure 3 In the spectrum shown, the narrowband infrared radiation has a much smaller spectral width than the broadband infrared radiation, and its integrated radiant power is also much less than that of the broadband infrared radiation. Furthermore, due to variations in the frequency and intensity of the alternating electromagnetic field, the curve in the infrared radiation spectrum measured by the spectrometer will also vary significantly. Proper control of the frequency and intensity of the alternating electromagnetic field can highlight these narrowband radiation lines.

[0042] In some embodiments of the present invention, the excitation device proposed in this application can be used as a signal transmitting device. In this case, the signal emitted by the excitation device may include a signal obtained by converting broadband infrared radiation and narrowband infrared radiation. In order to reduce the spectral line variation of the broadband infrared radiation, the excitation signal of the signal transmitting device can operate at a dual frequency, that is, alternating currents of two or more frequencies are simultaneously input into the electromagnetic excitation unit in the excitation device. Thus, by adjusting the power ratio of the alternating currents of each frequency while ensuring that the total power of the alternating currents of each frequency remains unchanged, the amplitude of the narrowband infrared radiation spectrum can be changed while keeping the power of the broadband infrared radiation basically unchanged. In this case, the narrowband infrared radiation can be superimposed on the spectrum of the essentially unchanged broadband infrared radiation. Since existing broadband infrared receiving devices have difficulty in sensing and distinguishing narrowband infrared radiation, it is possible to consider using narrowband infrared radiation to carry information and transmit it in the form of infrared radiation. Therefore, the excitation device proposed in this application that can generate simultaneously not only has a wide range of application prospects in infrared radiation, but also can hide information in the infrared radiation when the intensity variation of the narrowband infrared radiation is controlled in real time, thereby realizing covert transmission of information.

[0043] Corresponding to the above-mentioned excitation device, the present invention also provides a method for generating infrared radiation, which can be implemented using the excitation device described in any of the above embodiments. The method proposed in this application includes the following steps: The excitation material body 110 is stimulated by the electromagnetic energy of the external alternating electromagnetic field, and the graphite or graphene generates infrared radiation including broadband infrared radiation and narrowband infrared radiation generated based on energy level transitions: the first functional material (magnetostrictive material) produces a follow-up deformation under the action of the alternating electromagnetic field, which causes the second functional material (graphite or graphene) to be alternately squeezed and stretched, thereby causing the graphite or graphene to generate narrowband infrared radiation; at the same time, the eddy current generated by the graphite or graphene under the action of the alternating electromagnetic field does work to generate broadband infrared radiation.

[0044] In the method for generating infrared radiation proposed in this application, the preparation materials, setting of the mixing ratio and the mixing method of the excitation material body 110 can be as described above for the excitation device, and will not be repeated here.

[0045] The excitation device and method for generating infrared radiation proposed in this application can simultaneously generate two types of radiation, including broadband infrared radiation and narrowband infrared radiation generated based on energy level transitions, and can (1) adjust the energy ratio between broadband infrared radiation and narrowband infrared radiation by controlling the frequency and intensity of the input electromagnetic energy; (2) control the energy of narrowband infrared radiation to switch back and forth between strong and weak, thereby opening up a wider range of application scenarios, such as covert transmission of information, irradiation of biochemical materials, and safer biomedical irradiation.

[0046] It should be understood by those skilled in the art that the various exemplary components, systems and methods described in conjunction with the embodiments disclosed herein can be implemented in hardware, software or a combination of the two. Whether it is specifically performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link via a data signal carried in a carrier.

[0047] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0048] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0049] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations to the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An excitation device for generating infrared radiation, characterized in that include: An excitation material body comprises a first functional material and a second functional material, wherein the first functional material is a magnetostrictive material and the second functional material is graphite or graphene. The excitation material body is designed to cause the magnetostrictive material to produce a kinetic deformation under the action of an alternating electromagnetic field. The kinetic deformation is used to produce an alternating compression and stretching effect on the graphite or graphene, causing the graphite or graphene to undergo an energy level transition. The graphite or graphene is used to generate broadband infrared radiation and narrowband infrared radiation. The narrowband infrared radiation is the infrared radiation generated by the energy level transition.

2. The excitation device according to claim 1, characterized in that The main body of the excitation material is a mixture containing a first functional material and a second functional material. The mixture realizes energy transfer with dynamic deformation through close contact between the first functional material and the second functional material to generate energy level transition.

3. The excitation device according to claim 1, characterized in that The excitation material body is a solid block or solid particles.

4. The excitation device according to claim 1, characterized in that The spectral line width of broadband infrared radiation is greater than that of narrowband infrared radiation, and there is an overlapping portion in the wavelength bands corresponding to broadband infrared radiation and narrowband infrared radiation.

5. The excitation device according to claim 2, characterized in that The first functional material and the second functional material in the mixture are in powder form, and the particle sizes of the first functional material and the second functional material are below the micron level.

6. The excitation device according to claim 1, characterized in that The excitation device also includes an electromagnetic excitation unit; the alternating electromagnetic field is generated by inputting an alternating current into the electromagnetic excitation unit; the electromagnetic excitation unit is an electromagnetic coil; the excitation material body is used to be placed within the magnetic field coverage range of the electromagnetic coil.

7. The excitation device according to claim 6, characterized in that When the frequency of the alternating current input to the electromagnetic excitation unit increases, the proportion of broadband infrared radiation decreases and the proportion of narrowband infrared radiation increases; When the intensity of the alternating current input to the electromagnetic excitation unit increases, the wavelength of the central spectrum line of the broadband infrared radiation moves toward a shorter wavelength and the spectrum line amplitude increases, while the amplitude of the narrowband infrared radiation increases while the spectrum line position remains unchanged.

8. The excitation device according to claim 6, characterized in that When an alternating current containing more than two frequencies is input into an electromagnetic excitation unit, and the total power of the alternating currents of each frequency remains unchanged while the power ratio changes, when the power change of the broadband infrared radiation is small, the narrowband infrared radiation whose intensity changes greatly with the change of the power ratio is used to carry information to achieve covert transmission of information.

9. The excitation device according to claim 1, characterized in that The broadband infrared radiation is thermal radiation generated by the eddy current generated on the graphite or graphene under the action of the alternating electromagnetic field.

10. A method for generating infrared radiation, characterized in that: Using the excitation device according to any one of claims 1 to 9, the method comprises the following steps: Under the action of an alternating electromagnetic field, graphite or graphene in the material body is excited to generate infrared radiation including broadband infrared radiation and narrowband infrared radiation; The narrowband infrared radiation is generated by exciting the magnetostrictive material in the material body to produce a dynamic deformation under the action of an alternating electromagnetic field, which produces an alternating compression and stretching effect on the graphite or graphene, causing the graphite or graphene to undergo energy level transition.

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