A long-life X-ray pulse beacon device based on nuclear batteries

Abstract

The present application discloses a long-life X-ray pulse beacon device based on a nuclear battery, comprising an X-ray pulse source and a power module connected to the X-ray pulse source. The X-ray pulse source comprises: a first housing; a beta radiation source disposed within the first housing for generating beta particles; a transmissive thin-film hot cathode disposed within the first housing for receiving bombardment from the beta particles to generate thermal electrons; an anode target disposed within the first housing for receiving bombardment from the thermal electrons from the transmissive thin-film hot cathode to generate X-rays; and a grid disposed within the first housing between the beta radiation source and the transmissive thin-film hot cathode. The power module applies a pulse voltage between the beta radiation source and the grid, causing the beta particles to periodically pass through the grid and bombard the transmissive thin-film hot cathode. The present application can emit stable X-ray pulse signals that can be accurately captured and identified by detectors carried by spacecraft, meeting space positioning and navigation requirements.

Description

Technical Field

[0001] The present application relates to the field of space navigation and positioning technology, and in particular to a long-life X-ray pulse beacon device based on a nuclear battery. Background Art

[0002] Current space navigation and positioning are mainly based on traditional technologies such as low-level ranging, Doppler velocity measurement and very long baseline interferometry from the Earth. Relay satellites are often used to assist in positioning the detection of distant planets. However, with the continuous exploration of space, the above technologies are unable to meet the needs due to distance and delay factors. Summary of the Invention

[0003] In order to transmit stable X-ray pulse signals to meet the needs of space positioning and navigation, this application provides a long-life X-ray pulse beacon device based on nuclear batteries, which adopts the following technical solutions:

[0004] A long-life X-ray pulse beacon device based on a nuclear battery, comprising an X-ray pulse source and a power supply module connected to the X-ray pulse source, wherein the power supply module provides electrical energy for the X-ray pulse source; the X-ray pulse source comprises:

[0005] a first shell;

[0006] a beta radiation source, disposed in the first housing and configured to generate beta particles;

[0007] a transmission-type thin-film hot cathode, disposed in the first housing and configured to be bombarded by the beta particles to generate hot electrons;

[0008] an anode target, disposed in the first housing, for receiving bombardment of thermal electrons from the transmission-type thin-film hot cathode to generate X-rays; and

[0009] The grid is arranged in the first shell and is located between the beta radiation source and the transmission-type thin-film hot cathode. The power module applies a pulse voltage between the beta radiation source and the grid to make the beta particles periodically pass through the grid and bombard the transmission-type thin-film hot cathode.

[0010] Optionally, the beta radiation source and the anode target are respectively arranged on a set of opposite inner walls of the first shell, and the transmission-type thin film hot cathode and the grid are located between the beta radiation source and the anode target.

[0011] Optionally, the beta radiation source is 63 Made of Ni.

[0012] Optionally, the transmissive thin film hot cathode is made of diamond.

[0013] Optionally, the transmissive thin film hot cathode comprises a material with negative electron affinity.

[0014] Optionally, the power module includes:

[0015] a second shell;

[0016] an energy source disposed in the second shell, the energy source being a radioisotope heat source, the outer surface of the energy source being provided with a thermal radiation coating, the thermal radiation coating being used to convert thermal energy generated by the energy source into infrared thermal radiation;

[0017] an infrared filter, disposed between the energy source and the second housing, the infrared filter being used to filter non-infrared light components radiated by the thermal radiation coating;

[0018] The energy conversion unit is arranged on the inner wall of the second shell, and is used for collecting light energy from the thermal radiation coating and converting the light energy into electrical energy.

[0019] Optionally, the heat radiation coating is spinel ferrite.

[0020] Optionally, the second shell is a cylindrical structure, and a plurality of the energy conversion units are evenly distributed along the circumference of the inner wall of the second shell.

[0021] Optionally, the volume of the second shell is less than 300cm 3 .

[0022] Optionally, the outer wall of the second shell is provided with heat dissipation fins.

[0023] As mentioned above, when the X-ray pulse beacon device of the present application is applied to space, each X-ray pulse beacon device is set at a designated position in space, and a stable X-ray pulse signal is emitted at a fixed point. The spacecraft detects the X-ray pulse signals emitted by the X-ray pulse beacon devices at different positions, measures the distance according to the phase difference of different X-ray pulse signals, solves the actual position of the spacecraft, and obtains the flight speed and direction information of the spacecraft to achieve positioning and navigation requirements.

[0024] This application is based on the principle of natural pulsar navigation and uses a long-life X-ray pulse beacon device to replace pulsars to emit X-ray pulse signals. Compared with natural pulsars, the X-ray pulse beacon device of this application not only emits stable X-ray pulse signals, which are easier to be captured and identified by spacecraft, but also can emit X-ray signals with customized pulse periods and pulse energies, generating signals with higher flux and higher ranging accuracy, thereby improving the accuracy and real-time performance of positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by this application.

[0026] Figure 1 This is a schematic diagram of the overall structure of a long-life X-ray pulse beacon device based on a nuclear battery provided in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of an X-ray pulse source provided in an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of a power module provided in an embodiment of the present application;

[0029] Figure 4 It is a manifestation Figure 3 Schematic diagram of the internal structure;

[0030] Figure 5 This is a circuit diagram of a DC-DC boost module in a power supply system given in an embodiment of the present application.

[0031] In the figures, the reference numerals refer to the following:

[0032] 1. X-ray pulse source; 11. First shell; 12. β radiation source; 13. Transmission-type thin-film hot cathode; 14. Anode target; 15. Grid mesh; 16. Transmission port; 2. Power module; 21. Shell; 22. Energy source; 221. Thermal radiation coating; 23. Transducer unit; 24. Infrared filter; 25. Heat sink. DETAILED DESCRIPTION

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or interconnected connections; direct connections or indirect connections through an intermediary; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0034] The following is a clear and complete description of the technical solution of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts are within the scope of protection of this application.

[0035] With the continued exploration of space, the concept of using X-rays as a communication carrier for space communications has been proposed. Later, it was discovered that natural celestial bodies, called pulsars, can periodically emit pulse signals, and that X-rays concentrate the vast majority of their radiation energy. When the electromagnetic wave signals emitted by pulsars pass through detection equipment on the ground or on spacecraft, a pulse of electromagnetic radiation can be detected in the line of sight. Because the X-ray pulse signals generated by pulsars have a stable period and the speed of light is constant, by simultaneously observing multiple pulsars and measuring the distance based on the phase differences between their pulse signals, the true position of the spacecraft can be determined. This is the basic principle of pulsar navigation.

[0036] Although positioning and navigation can be achieved by relying on the spacecraft itself to detect X-ray signals emitted by multiple known pulsars, the distance between pulsars is far, so the X-ray signals are very weak, and the accuracy of pulse identification is required to be high. As a result, pulsar navigation technology has the disadvantages of high application threshold and low navigation efficiency, making it difficult to be widely used.

[0037] In order to overcome the above-mentioned technical defects, the present application proposes to set up a device in space that can stably emit X-ray signals, which is referred to as an X-ray pulse beacon device in the present application. The beacon device is usually used in the ocean or on land, and generally includes a power supply and a signal transmitting device. The power supply provides electrical energy to the various circuits of the signal transmitting device, and ultimately transmits signals in the form of electromagnetic waves, images, etc. The present application applies the design concept of the beacon device to the space environment, aiming to set up an X-ray pulse beacon device in space, and use a nuclear battery as a power source to emit stable X-ray pulse signals, so that the detector carried by the spacecraft can accurately capture and identify the X-ray pulse signals emitted by different beacons, solve the actual position of the spacecraft, and realize positioning and navigation functions.

[0038] Reference Figure 1 , is a long-life X-ray pulse beacon device based on a nuclear battery disclosed in an embodiment of the present application, which includes an X-ray pulse source 1 and a power module 2. The power module 2 is electrically connected to the X-ray pulse source 1 to provide electrical energy for the X-ray pulse source 1.

[0039] Reference Figure 2 The X-ray pulse source 1 includes a first shell 11 , a β radiation source 12 , a transmission-type thin film hot cathode 13 , an anode target 14 and a grid 15 .

[0040] The first housing 11 is a closed structure made of quartz glass. The first housing 11, the beta radiation source 12, the transmission-type thin-film hot cathode 13, the anode target 14, and the grid 15 are all disposed inside the first housing 11. The first housing 11 has a transmission port 16 for X-ray emission.

[0041] The β radiation source 12 is fixedly mounted on the inner wall of the first shell 11. When the nuclides in the β radiation source 12 decay, β particles can be generated. 63 Ni, of course, other nuclides can also be used, such as 147 Pm, 90 Sr et al.

[0042] A transmissive thin-film hot cathode 13 is fixed within the first housing 11, located in front of the beta radiation source 12. Made of diamond, the beta particles generated by the decay of the beta radiation source 12 bombard the transmissive thin-film hot cathode 13, prompting it to generate hot electrons.

[0043] The anode target 14 is fixedly mounted on the inner wall of the first housing 11 and generates X-rays when bombarded by thermal electrons from the transmission-type thin-film hot cathode 13 .

[0044] The grid 15 is fixed in the first housing 11 and is located between the β radiation source 12 and the transmission type thin film hot cathode 13 .

[0045] Reference Figure 2 In one implementation, the power module 2 applies a pulse voltage V1 between the β radiation source 12 and the transmission type thin film hot cathode 13, applies a DC voltage V2 between the grid 15 and the transmission type thin film hot cathode 13, and applies a DC voltage V3 between the transmission type thin film hot cathode 13 and the anode target 14.

[0046] A gate-controlled circuit is formed between the β radiation source 12 and the transmission-type thin-film hot cathode 13, generating a high-rate pulse voltage V1. This changes the electric field distribution between the β radiation source 12 and the grid 15. β particles generated by the decay of the β radiation source 12 periodically pass through the grid 15 under the action of the pulse voltage V1, and then bombard the transmission-type thin-film hot cathode 13 under the action of V2. The energy level of the transmission-type thin-film hot cathode 13 is raised, and more electrons can exceed the work function of the material, thereby significantly increasing the number of hot electrons emitted by the transmission-type thin-film hot cathode 13. Under the action of the high voltage V3, the hot electrons are accelerated to hit the anode target 14, generating uninterrupted X-ray pulse signals through bremsstrahlung radiation, and finally emitted into the external space through the transmission port 16.

[0047] When the X-ray pulse beacon device of the present application is used in space, each X-ray pulse beacon device is set at a specified position in space, and a stable X-ray pulse signal is emitted at a fixed point. The spacecraft detects the X-ray pulse signals emitted by the X-ray pulse beacon devices at different positions, measures the distance according to the phase difference of different X-ray pulse signals, solves the actual position of the spacecraft, and obtains the flight speed and direction information of the spacecraft to achieve positioning and navigation requirements.

[0048] This application is based on the principle of natural pulsar navigation and uses an X-ray pulse beacon device to replace pulsars to emit X-ray pulse signals. Compared with natural pulsars, the X-ray pulse beacon device of this application not only emits stable X-ray pulse signals that are easier to be captured and identified by spacecraft, but also can emit X-ray signals with customized pulse periods and pulse energies, generating signals with higher flux and higher ranging accuracy, thereby improving the accuracy and real-time performance of positioning.

[0049] According to an optional technical solution of an embodiment of the present application, the beta radiation source 12 and the anode target 14 are respectively fixedly arranged on a set of opposite inner walls of the first shell 11, and the transmission type thin film hot cathode 13 and the grid 15 are located between the beta radiation source 12 and the anode target 14. The transmission type thin film hot cathode 13 and the grid 15 are both fixed to the first shell 11 through insulating supports, and the centers of the beta radiation source 12, the grid 15, the transmission type thin film hot cathode 13 and the anode target 14 are located on the same straight line, so that the beta particles and thermal electrons move in a straight line.

[0050] According to an optional technical solution in an embodiment of the present application, the transmissive thin-film hot cathode 13 contains nitrogen or other materials with negative electron affinity. These materials spontaneously emit hot electrons at a certain temperature. Under certain external excitation conditions, such as illumination or beta radiation, the number of these hot electrons can be significantly increased. Furthermore, the addition of these materials significantly increases the number of hot electrons generated by the transmissive thin-film hot cathode 13 under periodic beta particle bombardment, thereby effectively ensuring X-ray flux and improving positioning accuracy.

[0051] Reference Figure 3 and Figure 4 The power module 2 is a radioisotope thermophotovoltaic cell, which includes a second shell 21 , an energy source 22 and an energy conversion unit 23 .

[0052] The second shell 21 has a closed cavity inside. The energy source 22 is fixedly arranged at the center of the cavity inside the second shell 21 , and the energy conversion unit 23 is fixedly arranged on the inner wall of the second shell 21 .

[0053] The energy source 22 is a radioisotope heat source, such as 238 PuO2, 241 AmO2,90 SrTiO3, etc. The outer surface of energy source 22 is coated with a thermal radiation coating 221. After receiving the heat generated by energy source 22, thermal radiation coating 221 emits high-energy-density infrared radiation to the surrounding area. During the spontaneous decay process of energy source 22, its operating temperature range is 600-1000K, and the bandgap emissivity of thermal radiation coating 221 is greater than 0.9.

[0054] Transducer unit 23 is a narrow-bandgap GaSb-based photovoltaic module. Alternatively, materials such as InGaAs and InGaAsSb can be used. It collects infrared radiation from thermal radiation coating 221, absorbs photons, and converts the light energy into electrical energy. Transducer unit 23 has a bandgap range of 0.60-0.75 eV.

[0055] Optionally, the second shell 21 is cylindrical as a whole, the energy source 22 is a cylindrical structure as a whole, and the axis of the energy source 22 coincides with the axis of the second shell 21, so that the infrared light can be uniformly radiated to the inner wall of the second shell 21 in all directions.

[0056] When the thermophotovoltaic cell of the present application is in operation, heat is generated during the spontaneous decay of the radioactive isotopes in the energy source 22 , which heats the external thermal radiation coating 221 and emits high-energy-density infrared radiation to the surroundings. The infrared light is continuously converted into electrical energy output in the energy conversion unit 23 .

[0057] This application uses radioisotopes as the energy source 22, and converts the heat energy generated by the decay of the radioisotopes into light energy through the thermal radiation coating 221, and then converts the light energy into electrical energy through the energy conversion unit 23. Compared with traditional chemical batteries and photovoltaic cells, its energy conversion efficiency is higher. At the same time, the radioisotope energy source 22 is small in size and light in weight. The battery is designed to be enclosed as a whole and has a compact structure. In addition, it emits infrared radiation from the center of the second shell 21 to the surrounding area through the thermal radiation coating 221. Compared with traditional thermal photovoltaic technology that uses solar energy, fossil fuels, etc. as heat sources, the energy density of radioisotopes is higher. In addition, the isotope heat source decays spontaneously, and its half-life can reach decades. Not only is the energy conversion mode stable, but its long life makes it more suitable for use in space environments, overcoming the problem of needing to regularly replace batteries.

[0058] The X-ray pulse beacon device of the present application is equipped with a radioisotope thermophotovoltaic cell. Since the radioisotope thermophotovoltaic cell has a higher energy density and a longer service life, it can continuously provide power to the beacon device for a long time, ensuring the stable emission of the X-ray pulse signal and providing long-term, real-time positioning and navigation services for the spacecraft.

[0059] In addition, the materials of the various components of the radioisotope thermophotovoltaic cell of the present application are designed for radiation reinforcement. For example, the special properties of the thermal radiation coating 221 and the transducer unit 23 enable them to withstand long-term thermal radiation, which can ensure that the performance of each component has high stability when using radioisotopes as a heat source.

[0060] Optionally, the material of the thermal radiation coating 221 is spinel ferrite, such as CuFe2O4, NiFe2O4, CoFe2O4 and the like. Of course, it can also be prepared using organic silicon, which is not specifically limited in this application.

[0061] As an optional technical solution in the embodiment of the present application, the outer cover of the energy source 22 is provided with an infrared filter 24. The infrared filter 24 is a cylindrical structure that encloses the energy source 22. Specifically, the material of the infrared filter 24 can be Si / SiO2, Si / TiO2, SiO2, etc. The infrared filter 24 has a transmittance within the band gap greater than 0.9 and a reflectivity outside the band gap greater than 0.9.

[0062] Since the thermal radiation converted by the thermal radiation coating 221 may contain non-infrared light components or infrared light with a longer wavelength, the function of the infrared filter 24 is to filter the non-infrared light components and infrared light with a longer wavelength radiated by the thermal radiation coating 221, thereby obtaining infrared light within a specific wavelength range, which is more conducive to being absorbed by the narrow-bandgap transducer unit 23.

[0063] On the other hand, for example, in traditional photovoltaic cell systems, most photons below the cell's bandgap are absorbed by the cell as heat, causing the cell temperature to rise and energy conversion efficiency to decrease. This problem can be effectively improved by regulating the wavelength band. Furthermore, in the process of regulating the wavelength band through the infrared filter 24, the infrared filter can also reflect infrared energy outside the specific wavelength range back to the surface of the energy source 22, which will increase the temperature of the energy source 22 again, thereby further improving energy utilization efficiency and reducing energy waste.

[0064] In some possible implementations of the present application, the second housing 21 may be a cylindrical structure, with multiple transducer units 23 evenly distributed along the circumference of the inner wall of the second housing 21. Of course, the second housing 21 may also be a hexagonal prism, an octagonal prism, or other structure, and correspondingly, the number of transducer units 23 may be six, eight, or other.

[0065] The energy conversion units 23 are evenly distributed on the inner wall of the second shell 21 and can fully receive energy from the central energy source 22, thereby further improving the energy conversion efficiency.

[0066] Optionally, when the radioisotope thermophotovoltaic cell in this application is used in a space environment, its volume is less than 300 cm 3, to meet the space requirements of space applications. In one possible implementation of this embodiment of the present application, along the radial direction of the second shell 21, the distance between the axis of the energy source 22 and the side wall of the infrared filter 24 is 2 cm, the distance between the side wall of the infrared filter 24 and the transducer unit 23 is 2 cm, and the height of the second shell 21 is 5-6 cm.

[0067] It should be noted that, precisely because this application uses radioactive isotopes as heat sources, compared to heat sources such as chemical fuels and solar energy, it can minimize the size of the battery, improve the compactness of the overall structure of the power system, and can be modularly combined and spliced.

[0068] As an optional technical solution of the embodiment of the present application, refer to Figure 3 and Figure 4 The outer wall of the second shell 21 is provided with heat dissipation fins 25, which can dissipate heat from the battery system and prevent the internal temperature of the system from being too high.

[0069] Optionally, multiple groups of heat dissipating fins 25 are arranged at intervals along the circumference of the outer wall of the second housing 21, and the heat dissipating fins 25 correspond one-to-one to the transducer units 23. The multiple groups of heat dissipating fins 25 are arranged at intervals, and each group of heat dissipating fins 25 corresponds to a respective transducer unit 23. Gaps are formed between adjacent groups of heat dissipating fins 25, thereby increasing the contact area between the heat dissipating fins 25 and the surrounding space, which is conducive to improving heat dissipation efficiency.

[0070] The present application also discloses a power supply system. Figure 1 , including the radioisotope thermophotovoltaic cell, the DC-DC boost module 3 and the energy storage unit 4 in any of the above embodiments.

[0071] Reference Figure 5 , which is a circuit diagram of the DC-DC boost module provided in an embodiment of the present application. The DC-DC boost module first uses an LC oscillation circuit to generate a high-frequency alternating pulse oscillating current, and then uses a magnetic core booster to boost the low voltage to a high voltage within a set range, thereby storing it in an energy storage unit.

[0072] It should be noted that a DC-DC boost module utilizes electronic components such as a bootstrap diode and a bootstrap capacitor to superimpose the capacitor discharge voltage and the power supply voltage, thereby increasing the boosted voltage to several times the power supply voltage. DC-DC boost modules are well known in the art and are not described in detail in the present embodiment.

[0073] Since X-ray pulse beacon devices often require a higher power supply voltage, and the voltage of the radioisotope thermophotovoltaic cell itself is often difficult to meet the requirement, the radioisotope thermophotovoltaic cell is connected to a DC-DC boost module to achieve voltage adjustment to meet space requirements.

[0074] At the same time, since the radioisotope thermal photovoltaic cell uses a radioisotope heat source as the energy source 22, it is decaying all the time and can continuously output electrical energy. Therefore, the present invention will connect an energy storage unit to the high-voltage end of the DC-DC boost module to collect and store electrical energy, and then output electrical energy when the positioning and navigation system has power supply needs.

[0075] Optionally, the energy storage unit in this application utilizes a solid-state supercapacitor. A solid-state supercapacitor is a novel energy storage device between conventional capacitors and batteries. It offers advantages such as high power density, long charge-discharge cycle life, long energy storage life, and a wide operating temperature range, making it particularly suitable for use in space environments. When the payload requires power, the solid-state supercapacitor outputs performance parameters such as voltage and current that are compatible with the positioning and navigation system.

[0076] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the technical solutions and core concepts of the present application. Therefore, changes or modifications made by those skilled in the art based on the concepts of the present application, the specific implementation methods, and the scope of application of the present application, all fall within the scope of protection of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A long-life X-ray pulse beacon device based on a nuclear battery, characterized in that: It includes an X-ray pulse source and a power supply module connected to the X-ray pulse source, wherein the power supply module provides electrical energy for the X-ray pulse source; The X-ray pulse source comprises: a first shell; a beta radiation source, disposed in the first housing and configured to generate beta particles; a transmission-type thin-film hot cathode, disposed in the first housing and configured to be bombarded by the beta particles to generate hot electrons; an anode target, disposed in the first housing, for receiving bombardment of thermal electrons from the transmission-type thin-film hot cathode to generate X-rays; and The grid is arranged in the first shell and is located between the beta radiation source and the transmission-type thin-film hot cathode. The power module applies a pulse voltage between the beta radiation source and the grid to make the beta particles periodically pass through the grid and bombard the transmission-type thin-film hot cathode.

2. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 1, characterized in that: The beta radiation source and the anode target are respectively arranged on a set of opposite inner walls of the first shell, and the transmission type thin film hot cathode and the grid are located between the beta radiation source and the anode target and fixed by an insulating support.

3. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 1, characterized in that: The beta radiation source is 63 Made of Ni.

4. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 1, characterized in that: The transmission type thin film hot cathode is made of diamond.

5. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 1, characterized in that: The transmissive thin film hot cathode includes a material with negative electron affinity.

6. The long-life X-ray pulse beacon device based on a nuclear battery according to any one of claims 1 to 5, characterized in that: The power module includes: a second shell; an energy source disposed in the second shell, the energy source being a radioisotope heat source, the outer surface of the energy source being provided with a thermal radiation coating, the thermal radiation coating being used to convert thermal energy generated by the energy source into infrared thermal radiation; an infrared filter, disposed between the energy source and the second housing, the infrared filter being used to filter non-infrared light components radiated by the thermal radiation coating; The energy conversion unit is arranged on the inner wall of the second shell, and is used for collecting light energy from the thermal radiation coating and converting the light energy into electrical energy.

7. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 6, characterized in that: The heat radiation coating is spinel ferrite.

8. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 6, characterized in that: The second shell is a cylindrical structure, and a plurality of the energy conversion units are evenly distributed along the circumference of the inner wall of the second shell.

9. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 8, characterized in that: The volume of the second shell is less than 300 cm 3 .

10. The long-life X-ray pulse beacon device based on a nuclear battery according to claim 6, characterized in that: The outer wall of the second housing is provided with heat dissipation fins.

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