CN111106875B - Black barrier area X-ray communication system and method thereof - Google Patents
Black barrier area X-ray communication system and method thereof Download PDFInfo
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- CN111106875B CN111106875B CN201911301601.5A CN201911301601A CN111106875B CN 111106875 B CN111106875 B CN 111106875B CN 201911301601 A CN201911301601 A CN 201911301601A CN 111106875 B CN111106875 B CN 111106875B
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Abstract
The invention belongs to the technical field of X-ray communication, and particularly relates to a black-barrier area X-ray communication system, which comprises: an X-ray communication signal generating device (2) arranged in the aircraft cabin body 1 and an X-ray communication signal receiving device (6) arranged in the communication satellite (5); the X-ray communication signal generating device (2) is used for generating X-rays with modulation information and transmitting X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device (6); the X-ray communication signal receiving device (6) is used for receiving the X-rays with the modulation information, demodulating the X-rays to obtain available information, transmitting the X-rays with the available information back to the ground receiving terminal (9) by the X-ray energy radiated from the X-ray communication signal generating device (2), and completing the communication of the X-rays in the black-out area.
Description
Technical Field
The invention belongs to the technical field of X-ray communication, and particularly relates to a black barrier area X-ray communication system and a method thereof.
Background
When the aircraft, the satellite, the spacecraft, the space shuttle and other space reentry bodies pass through the atmosphere, huge friction and strong extrusion are generated between the aircraft, the satellite, the spacecraft, the space shuttle and other space reentry bodies and the air, when the temperature is suddenly increased to more than 3000K, atmospheric molecules are ionized, and part of electrons rotating around atomic nuclei are separated from the traction of the atomic nuclei and become free electrons, so that the originally neutral molecules become ions with positive charges. Meanwhile, when the free electrons meet with positively charged ions, the free electrons are compounded into neutral molecules, and finally, the ionization and the compounding reach an equilibrium state. In addition to the interaction of free electrons and charged ions in the gas, and physical and chemical processes such as chemical freezing of non-equilibrium ionization processes caused by fluid diffusion, surface enhancement of chemical reactions, burning of aircraft surfaces, deposition of surface net charges, etc., a plasma with a certain thickness is finally formed around the aircraft, which is called as a plasma sheath. Plasma sheath density of 109～1014Per cm3The frequency of the communication signal is higher than the frequency range (1-10 GHz) of the conventional L, S, X and C wave communication signals, so that most of the communication signals can be absorbed and reflected by the plasma, and a screen similar to a metal cover is generatedThe shadowing effect causes attenuation of communication signals, and in severe cases, leads to complete signal interruption, which is called a communication blackout phenomenon.
Communication blackouts can cause interference or interruption in the real-time transmission of the relevant signals, which can have a serious impact on the real-time control and safety of the aircraft. The blackout time usually lasts for 4-10 minutes, the aircraft may be in the worst space environment in the period, any parameter information such as impact, vibration, overload and the like cannot be transmitted to the ground command system in time, and the fault cannot be eliminated in time, so that the aircraft is disassembled, and even the life safety of astronauts is threatened. Therefore, it is important to solve the communication problem in the blackout area.
Currently, there are two types of methods for inhibiting or reducing the black barrier effect: the first method is to weaken the electron density distribution of plasma above the aircraft antenna, for example, add strong magnetic field or magnetic windowing, introduce cross electromagnetic field, purify harmful impurities of heat release materials, etc.; the second method is to improve the penetration ability of electromagnetic waves in the plasma sheath, such as increasing the transmission power, increasing the gains of the transmitting antenna and the receiving antenna, increasing the carrier frequency (using Ku and Ka band or terahertz band electromagnetic waves for communication), and the like. However, neither of the above two approaches completely solves the communication problem in black-out areas.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an X-ray communication system and method for a black barrier area, which solve the special communication problem of the black barrier area in the process that a space reentry body such as an aircraft, a spacecraft, a space shuttle and the like returns to the ground by utilizing X-rays;
in order to achieve the above object, the present invention provides a black-mask region X-ray communication system, comprising: the X-ray communication signal generating device is arranged in the cabin body of the aircraft, and the X-ray communication signal receiving device is arranged in the communication satellite;
the X-ray communication signal generating device is used for generating X-rays with modulation information and transmitting X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device;
the X-ray communication signal receiving device is used for receiving the X-rays with the modulation information, demodulating the X-rays with the modulation information to obtain available information, transmitting the X-rays with the available information back to the ground receiving terminal by the X-ray energy radiated from the X-ray communication signal generating device, and completing the communication of the X-rays in the black-out area.
As an improvement of the above technical solution, the X-ray communication signal generating apparatus includes: a high-frequency X-ray generating modulator and an X-ray collimating lens; the high-frequency X-ray generation modulator is arranged opposite to the X-ray collimating lens, X-rays with modulation information generated by the high-frequency X-ray generation modulator are transmitted to the X-ray collimating lens through X-ray focal spots, parallel X-ray beams with modulation information are formed through the X-ray collimating lens, and the X-ray focal spots radiated along the 4 pi direction are transmitted to the X-ray communication signal receiving device.
As an improvement of the above technical solution, the high frequency X-ray generating modulator includes: the cathode filament is arranged on the anode target, and comprises a first cathode binding post, a second cathode binding post, a cathode filament, a modulation electrode, a first electron lens focusing electrode, a second electron lens focusing electrode, a third electron lens focusing electrode, a fourth electron lens focusing electrode and an anode target;
the first cathode binding post, the second cathode binding post, the cathode filament, the modulation electrode, the first electronic lens focusing electrode, the second electronic lens focusing electrode, the third electronic lens focusing electrode, the fourth electronic lens focusing electrode and the anode target are all arranged in a high-frequency X-ray generation modulator shell, and an X-ray focal spot is arranged outside the high-frequency X-ray generation modulator shell and is opposite to the anode target;
the first cathode binding post and the second cathode binding post are arranged in parallel relatively, one end of the first cathode binding post and one end of the second cathode binding post both extend to the outside of the shell of the high-frequency X-ray generation modulator, the other end of the first cathode binding post and the other end of the second cathode binding post are connected through a cathode filament, and the modulation electrode is arranged close to the cathode filament and is perpendicular to the first cathode binding post and the second cathode binding post; the first electronic lens focusing electrode and the second electronic lens focusing electrode are oppositely arranged close to the modulation electrode, and a first opening is arranged between the first electronic lens focusing electrode and the modulation electrode; the third electronic lens focusing electrode and the fourth electronic lens focusing electrode are oppositely arranged, a second opening is arranged between the third electronic lens focusing electrode and the fourth electronic lens focusing electrode, and the anode target is arranged on the inner wall of the shell of the high-frequency X-ray generation modulator and is positioned on the horizontal central line of the first opening and the second opening; the modulating electrode generates free electron beams, focuses the free electron beams on an anode target, and emits X-ray beams with modulation information outwards through X-ray focal spots radiated along the direction of 4 pi.
As one improvement of the above technical solution, the width of the first opening is larger than the width of the second opening.
As an improvement of the above technical solution, the X-ray communication signal receiving apparatus includes: a high-frequency X-ray demodulator and an X-ray focusing lens;
the high-frequency X-ray demodulator and the X-ray focusing lens are oppositely arranged; the X-ray focusing lens receives the X-ray beam with the modulation information and focuses the X-ray beam on the X-ray demodulator, the X-ray demodulator demodulates the received X-ray beam with the modulation information to obtain available information, and transmits the available information to the ground receiving terminal, so that the X-ray communication of the whole black barrier area is completed.
The invention also provides a black-mask area X-ray communication method, which is realized by the system and comprises the following steps:
the X-ray communication signal generating device generates X-rays with modulation information and transmits X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device;
the X-ray communication signal receiving device receives and demodulates the X-rays with the modulation information to obtain available information, and then the X-ray energy radiated from the X-ray communication signal generating device transmits the X-rays with the available information back to the ground receiving terminal to complete the X-ray communication in the black barrier area.
As an improvement of the above technical solution, the X-ray communication signal generating device generates X-rays with modulation information and emits X-ray focal spots radiated along a 4 pi direction to the X-ray communication signal receiving device; the method specifically comprises the following steps:
the X-ray with modulation information generated by the high-frequency X-ray generation modulator is transmitted to the X-ray collimating lens through an X-ray focal spot, and forms a parallel X-ray beam with modulation information through the X-ray collimating lens, and the X-ray beam with modulation information is radiated to an X-ray focusing lens 7 through the X-ray focal spot radiated by 4 pi and then focused on the X-ray demodulator.
As one improvement of the above technical solution, the X-ray communication signal receiving device receives and demodulates the X-ray with the modulation information to obtain available information, and then transmits the X-ray energy radiated from the X-ray communication signal generating device back to the ground receiving terminal to complete the communication of the X-ray in the black-out area; the method specifically comprises the following steps:
the X-ray communication signal receiving device receives and demodulates the X-rays with the modulation information to obtain available information, and then the X-ray energy radiated from the X-ray communication signal generating device is calculated according to the following formula, namely the X-ray energy radiated by the collimating lens is transmitted back to the ground receiving terminal to finish the communication of the X-rays in the black barrier area;
wherein the X-ray energy E of the radiated X-ray beam is generated from the X-ray communication signalX1In relation to the focal length F and the aperture R of the collimator lens, is determined by:
wherein E isX1The energy of the X-ray beam radiated by the collimating lens; eXFor modulating the energy of the X-ray source; r is the aperture of the collimating lens; f is the focal length of the collimating lens;
wherein, the X-ray energy finally received by the X-ray focusing lens with the distance D and the area S from the collimating lens is EX2The X-ray energy Ex required to be output by the X-ray generation modulator is determined by the following equation:
wherein E isX1Generating an X-ray energy output by the modulator for the X-rays; eX2The energy of the X-ray finally received by the collimating lens and the X-ray focusing lens; r is the aperture of the collimating lens; f is the focal length of the collimating lens; d is a communication distance; s is the receiving area of the receiving antenna.
Compared with the prior art, the invention has the beneficial effects that:
the system of the invention uses X-ray as the communication carrier wave of the black barrier area, can thoroughly solve the communication problem of the black barrier area, and has the advantages of good directivity, low transmitting power, long transmission distance, strong confidentiality and wide communication frequency band.
Drawings
FIG. 1 is a schematic diagram of a black-mask X-ray communication system according to the present invention;
FIG. 2 is a schematic diagram of a high-frequency X-ray generation modulator in an X-ray communication signal generation device of a black-mask X-ray communication system according to the present invention;
fig. 3 is a schematic structural diagram of an X-ray collimator lens focused by an X-ray focal spot in an X-ray communication signal generating device of an X-ray communication system in a black barrier region according to the present invention.
Description of the drawings:
1. aircraft cabin 2 and X-ray communication signal generating device
3. High-frequency X-ray generation modulator 4 and X-ray collimating lens
5. Communication satellite 6, X-ray communication signal receiving device
7. High-frequency X-ray demodulator 8 and X-ray focusing lens
9. Ground receiving terminal 10, X-ray focal spot
31. First and second cathode terminals 32 and 32
33. Cathode filament 34 and modulation electrode
35. A first electron lens focusing electrode 36 and a second electron lens focusing electrode
37. A third electron lens focusing electrode 38 and a fourth electron lens focusing electrode
39. Anode target 40, free electron beam
41. High frequency X-ray generating modulator housing
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an X-ray communication system in black-out region for communication signal interference or interruption of the penetration of the aircraft, satellite, spacecraft, space shuttle and other space reentrants through the atmosphere, which solves the communication problem in black-out region.
The black barrier area X-ray communication system comprises: an X-ray communication signal generating device 2 arranged in the aircraft cabin 1 and an X-ray communication signal receiving device 6 arranged in the communication satellite 5;
the X-ray communication signal generating device 2 is used for generating X-rays with modulation information and transmitting X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device 6;
the X-ray communication signal receiving device 6 is configured to receive and demodulate the X-ray with the modulation information to obtain available information, and then transmit the X-ray energy radiated from the X-ray communication signal generating device 2, that is, the X-ray energy radiated through the collimating lens, back to the ground receiving terminal 9, so as to complete the communication of the X-ray in the blackout area.
The X-ray communication signal generation apparatus 2 includes: a high-frequency X-ray generation modulator 3 and an X-ray collimating lens 4; the high-frequency X-ray generation modulator 3 is arranged opposite to the X-ray collimating lens 4, X-rays with modulation information generated by the high-frequency X-ray generation modulator 3 are transmitted to the X-ray collimating lens 4 through an X-ray focal spot 10, parallel X-ray beams with modulation information are formed through the X-ray collimating lens 4, and then the X-ray focal spots radiated along the 4 pi direction are transmitted to the X-ray communication signal receiving device 6.
As shown in fig. 2, the high-frequency X-ray generation modulator 3 includes: a first cathode terminal 31, a second cathode terminal 32, a cathode filament 33, a modulator electrode 34, a first electron lens focus electrode 35, a second electron lens focus electrode 36, a third electron lens focus electrode 37, a fourth electron lens focus electrode 38, and an anode target 39;
the first cathode terminal 31, the second cathode terminal 32, the cathode filament 33, the modulation electrode 34, the first electron lens focusing electrode 35, the second electron lens focusing electrode 36, the third electron lens focusing electrode 37, the fourth electron lens focusing electrode 38 and the anode target 39 are all installed in a high-frequency X-ray generation modulator shell 41, and the X-ray focal spot 10 is installed outside the high-frequency X-ray generation modulator shell 41 and is opposite to the anode target 39;
the first cathode binding post 31 and the second cathode binding post 32 are oppositely arranged in parallel, one end of the first cathode binding post 31 and one end of the second cathode binding post 32 both extend to the outside of the high-frequency X-ray generation modulator shell 41, the other end of the first cathode binding post 31 and the other end of the second cathode binding post 32 are connected through a cathode filament 33, and the modulation electrode 34 is arranged close to the cathode filament 33 and is in perpendicular relation to the first cathode binding post 31 and the second cathode binding post 32; the first electron lens focusing electrode 35 and the second electron lens focusing electrode 36 are both disposed close to the modulation electrode 34 and opposite to each other, and a first opening is provided therebetween; the third electron lens focusing electrode 37 and the fourth electron lens focusing electrode 38 are oppositely arranged, and a second opening is arranged between the third electron lens focusing electrode and the fourth electron lens focusing electrode, and the anode target 39 is arranged on the inner wall of the high-frequency X-ray generation modulator shell 41 and is positioned on the horizontal central line of the first opening and the second opening; the modulating electrode 34 generates a free electron beam 40 which is focused onto an anode target 39 and emits an X-ray beam with modulated information outward through the X-ray focal spot 10 radiating in the 4 pi direction.
The width of the first opening is greater than the width of the second opening.
The X-ray communication signal receiving apparatus 6 includes: a high-frequency X-ray demodulator 8 and an X-ray focusing lens 7; the high-frequency X-ray demodulator 8 and the X-ray focusing lens 7 are oppositely arranged; the X-ray focusing lens 7 receives the X-ray beam with the modulation information and focuses the X-ray beam on the X-ray demodulator 8, the X-ray demodulator 8 demodulates the received X-ray beam with the modulation information to obtain available information, and transmits the available information to the ground receiving terminal 9, and the communication of the X-rays of the whole black barrier area is completed.
The invention also provides a black-mask area X-ray communication method, which is realized by the system and comprises the following steps:
the X-ray communication signal generating device generates X-rays with modulation information and transmits X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device 6;
the X-ray communication signal receiving device 6 receives the X-ray with the modulation information, demodulates the X-ray with the modulation information to obtain available information, and transmits the X-ray with the available information back to the ground receiving terminal 9 according to the obtained X-ray energy radiated from the X-ray communication signal generating device 2, namely the X-ray energy radiated through the collimating lens, so as to complete the communication of the X-ray in the black barrier area.
The X-ray communication signal generating device generates X-rays with modulation information and transmits X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device 6; the method specifically comprises the following steps:
the X-ray with modulation information generated by the high-frequency X-ray generation modulator 3 is transmitted to the X-ray collimating lens 4 through the X-ray focal spot 10, and forms a parallel X-ray beam with modulation information through the X-ray collimating lens 4, as shown in fig. 3, the X-ray beam with modulation information is radiated to the X-ray focusing lens 7 through the X-ray focal spot radiated by 4 pi through the X-ray collimating lens 4, and then is focused on the X-ray demodulator 8.
Wherein, the two ends of the first cathode filament binding post 31 and the second cathode filament binding post 32 are electrified, when the temperature of the cathode filament 33 reaches above 800 ℃, the free electron beam 40 is generated;
by changing the electric potential between the first electron lens focusing electrode 35 and the second electron lens focusing electrode 36 and the electric potential between the third electron lens focusing electrode 37 and the fourth electron lens focusing electrode 38, the electric field distribution in the whole X-ray tube is changed, so that the motion track of the free electron beam 40 is changed, and finally focused on the anode target 39, and an electron micro focal spot is formed. Electrons in the electron micro-focal spot have high energy, and when the electrons in the electron micro-focal spot are focused on the anode target 39, bremsstrahlung and characteristic spectrum X-rays are generated and radiated along the 4 pi direction. The electron micro focal spot size can be considered to be about the X-ray focal spot size, i.e. the focal spot size of the X-rays generated by the high frequency X-ray generating modulator 3.
Modulation information is loaded on a modulation electrode 34 in the high-frequency X-ray generation modulator 3, modulation of X-ray communication is realized by modulating the free electron beam 40 by a pulse modulation method, X-rays with modulation information are generated, and the X-rays are transmitted to the X-ray collimating lens 4 through the X-ray focal spot 10.
The common signal modulation method for X-ray communication includes amplitude modulation, binary phase shift keying and the like; among them, pulse modulation is preferable;
meanwhile, an X-ray as a modulation signal is an electromagnetic wave having a large energy, and its energy is generally in a range of several keV to several hundred keV. The X-ray also has a characteristic that after the X-ray is transmitted in the atmosphere for a certain distance, some X-rays are absorbed by the atmosphere, and the absorption (attenuation) efficiency of the X-ray with different energy is different, and the absorption (attenuation) efficiency of the X-ray with the same energy in the atmosphere with different height is also different, that is, the intensity of the X-ray obtained after a certain distance in the atmosphere follows the following formula:
wherein, I is the X-ray intensity after atmospheric attenuation: i is0Is the initial intensity of the X-ray; ρ is the atmospheric density; d is the thickness of the atmosphere passing through; n is a radical ofAIs an Avogastron constant; x is the number ofiThe ratio of different components; a. theiAtomic numbers of different components; sigmaaiIs atomic absorption of different elementsAnd (4) narrowing the section.
In order to realize black barrier communication, X-rays as communication signals are transmitted in the atmosphere without fail, and the intensity of the X-rays is attenuated without fail, so that the proper X-ray energy section is selected as a carrier wave to perform signal transmission communication according to different positions and heights of an aircraft or other reentry bodies in the atmosphere through calculation of the formula.
The X-ray communication signal receiving device 6 receives and demodulates the X-ray with the modulation information to obtain available information, and then the available information is transmitted back to the ground receiving terminal 9 to complete the communication of the X-ray in the black-out area; the method specifically comprises the following steps:
the X-ray communication signal receiving device 6 receives the X-ray with the modulation information, demodulates the X-ray with the modulation information to obtain available information, and then calculates the X-ray energy radiated from the X-ray communication signal generating device 2 according to the following formula, namely the X-ray energy radiated through the collimating lens, and transmits the X-ray with the available information back to the ground receiving terminal 9 to complete the communication of the X-ray in the black barrier area;
wherein the X-ray energy E of the radiated X-ray beamX1In relation to the focal length F and the aperture R of the collimator lens, is determined by:
wherein E isX1The energy of the X-ray beam radiated by the collimating lens; eXFor modulating the energy of the X-ray source; r is the aperture of the collimating lens; f is the focal length of the collimating lens;
the X-ray focal spot formed by the X-ray generation modulator is placed at the focal point of the collimating lens, so that the minimum emission angle of the emergent X-ray beam is ensured.
Wherein, the energy of the finally received X-ray is E from the X-ray focusing lens 8 with the distance of the collimating lens D and the area SX2The X-ray energy Ex required to be output by the X-ray generation modulator is determined by the following equation:
wherein E isX1Generating an X-ray energy output by the modulator for the X-rays; eX2Is the X-ray energy finally received by the collimating lens and the X-ray focusing lens 8; r is the aperture of the collimating lens; f is the focal length of the collimating lens; d is a communication distance; s is the receiving area of the receiving antenna.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A blackout area X-ray communication system, comprising: an X-ray communication signal generating device (2) arranged in the aircraft cabin body 1 and an X-ray communication signal receiving device (6) arranged in the communication satellite (5);
the X-ray communication signal generating device (2) is used for generating X-rays with modulation information and transmitting X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device (6);
the X-ray communication signal receiving device (6) is used for receiving and demodulating the X-rays with the modulation information to obtain available information, and then the X-ray energy radiated from the X-ray communication signal generating device (2) transmits the X-rays with the available information back to the ground receiving terminal (9) to complete the communication of the X-rays in the black barrier area;
the X-ray communication signal generation device (2) comprises: a high-frequency X-ray generation modulator (3) and an X-ray collimating lens (4); the high-frequency X-ray generation modulator (3) is arranged opposite to the X-ray collimating lens (4), X-rays with modulation information generated by the high-frequency X-ray generation modulator (3) are transmitted to the X-ray collimating lens (4) through an X-ray focal spot (10), parallel X-ray beams with modulation information are formed through the X-ray collimating lens (4), and then the X-ray focal spots radiated along the 4 pi direction are transmitted to the X-ray communication signal receiving device (6);
the high-frequency X-ray generating modulator (3) comprises: a first cathode terminal (31), a second cathode terminal (32), a cathode filament (33), a modulation electrode (34), a first electron lens focusing electrode (35), a second electron lens focusing electrode (36), a third electron lens focusing electrode (37), a fourth electron lens focusing electrode (38) and an anode target (39);
the first cathode binding post (31), the second cathode binding post (32), the cathode filament (33), the modulation electrode (34), the first electronic lens focusing electrode (35), the second electronic lens focusing electrode (36), the third electronic lens focusing electrode (37), the fourth electronic lens focusing electrode (38) and the anode target (39) are all installed in a high-frequency X-ray generation modulator shell (41), and the X-ray focal spot (10) is installed outside the high-frequency X-ray generation modulator shell (41) and is opposite to the anode target (39);
the first cathode binding post (31) and the second cathode binding post (32) are arranged in parallel relatively, one end of the first cathode binding post (31) and one end of the second cathode binding post (32) both extend towards the outside of the high-frequency X-ray generation modulator shell (41), the other end of the first cathode binding post (31) and the other end of the second cathode binding post (32) are connected through a cathode filament (33), and the modulation electrode (34) is arranged close to the cathode filament (33) and is perpendicular to the first cathode binding post (31) and the second cathode binding post (32); the first electron lens focusing electrode (35) and the second electron lens focusing electrode (36) are oppositely arranged close to the modulation electrode (34), and a first opening is arranged between the first electron lens focusing electrode and the modulation electrode; the third electron lens focusing electrode (37) and the fourth electron lens focusing electrode (38) are oppositely arranged, a second opening is arranged between the third electron lens focusing electrode and the fourth electron lens focusing electrode, and an anode target (39) is arranged on the inner wall of a shell (41) of the high-frequency X-ray generation modulator and is positioned on the horizontal central line of the first opening and the second opening; the modulating electrode (34) generates a free electron beam (40), focuses the free electron beam on an anode target (39), and emits an X-ray beam with modulation information outwards through an X-ray focal spot (10) radiating along the 4 pi direction;
x radiated from an X-ray communication signal generating device (2)X-ray energy E of the radiation beamX1In relation to the focal length F and the aperture R of the collimator lens, is determined by:
wherein E isX1The energy of the X-ray beam radiated by the collimating lens; eXFor modulating the energy of the X-ray source; r is the aperture of the collimating lens; f is the focal length of the collimating lens;
wherein the energy of the finally received X-ray is E from the X-ray focusing lens (8) with the distance of the collimating lens D and the area SX2The X-ray energy Ex required to be output by the X-ray generation modulator is determined by the following equation:
wherein E isX1Generating an X-ray energy output by the modulator for the X-rays; eX2Is the X-ray energy finally received by the collimating lens and the X-ray focusing lens (8); r is the aperture of the collimating lens; f is the focal length of the collimating lens; d is a communication distance; s is the receiving area of the receiving antenna.
2. The black mask area X-ray communication system of claim 1, wherein the width of the first opening is greater than the width of the second opening.
3. The black-mask X-ray communication system according to claim 1, wherein the X-ray communication signal receiving means (6) comprises: a high-frequency X-ray demodulator (8) and an X-ray focusing lens (7);
the high-frequency X-ray demodulator (8) and the X-ray focusing lens (7) are oppositely arranged; the X-ray focusing lens (7) receives the X-ray beam with the modulation information and focuses the X-ray beam onto the X-ray demodulator (8), the X-ray demodulator (8) demodulates the received X-ray beam with the modulation information to obtain available information, and transmits the available information to the ground receiving terminal (9), and the communication of the X-rays of the whole black barrier area is completed.
4. A blackdam area X-ray communication method implemented by the system of any one of claims 1 to 3, the method comprising:
the X-ray communication signal generating device generates X-rays with modulation information and emits X-ray focal spots radiated along the 4 pi direction to the X-ray communication signal receiving device (6);
the X-ray communication signal receiving device (6) receives and demodulates the X-rays with the modulation information to obtain available information, and then the X-ray energy radiated from the X-ray communication signal generating device (2) transmits the X-rays with the available information back to the ground receiving terminal (9) to complete the communication of the X-rays in the black barrier area;
specifically, the X-ray communication signal receiving device (6) receives and demodulates the X-rays with the modulation information to obtain available information, and then the X-ray energy radiated from the X-ray communication signal generating device (2) is calculated according to the following formula, namely the X-ray energy radiated by the collimating lens transmits the X-rays with the available information back to the ground receiving terminal (9), so that the communication of the X-rays in the black barrier area is completed;
wherein the X-ray energy E of the X-ray beam radiated from the X-ray communication signal generating device (2)X1In relation to the focal length F and the aperture R of the collimator lens, is determined by:
wherein E isX1The energy of the X-ray beam radiated by the collimating lens; eXFor modulating the energy of the X-ray source; r is the aperture of the collimating lens; f is the focal length of the collimating lens;
wherein the energy of the finally received X-ray is E from the X-ray focusing lens (8) with the distance of the collimating lens D and the area SX2X-ray, X-rayThe X-ray energy Ex required to produce the output of the modulator is determined by:
wherein E isX1Generating an X-ray energy output by the modulator for the X-rays; eX2Is the X-ray energy finally received by the collimating lens and the X-ray focusing lens (8); r is the aperture of the collimating lens; f is the focal length of the collimating lens; d is a communication distance; s is the receiving area of the receiving antenna.
5. The method according to claim 4, characterized in that the X-ray communication signal generating device generates X-rays with modulation information and emits the X-ray focal spots radiating in the 4 pi direction to the X-ray communication signal receiving device (6); the method specifically comprises the following steps:
the X-ray with modulation information generated by the high-frequency X-ray generation modulator (3) is transmitted to the X-ray collimating lens (4) through the X-ray focal spot 10 and forms a parallel X-ray beam with modulation information through the X-ray collimating lens (4), and the X-ray beam with modulation information is radiated to the X-ray focusing lens (7) through the X-ray collimating lens (4) through the X-ray focal spot radiated by 4 pi and then focused on the X-ray demodulator (8).
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