CN112615805A - Mechanical antenna communication system and method based on double permanent magnets - Google Patents
Mechanical antenna communication system and method based on double permanent magnets Download PDFInfo
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- CN112615805A CN112615805A CN202011211134.XA CN202011211134A CN112615805A CN 112615805 A CN112615805 A CN 112615805A CN 202011211134 A CN202011211134 A CN 202011211134A CN 112615805 A CN112615805 A CN 112615805A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/389—Demodulator circuits; Receiver circuits with separate demodulation for the phase and amplitude components
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
Abstract
The invention discloses a mechanical antenna communication system and a method based on double permanent magnets, wherein the system comprises: mechanical mechanism unit, power and the control unit and state monitoring unit, mechanical mechanism unit includes from a left side to the right side in proper order: the driving module, the first permanent magnet, the phase modulation module and the second permanent magnet are connected through a transmission mechanism, and the driving module can drive the first permanent magnet and the second permanent magnet to rotate at a constant speed; the power supply and control unit can control the operation of the driving module and the phase modulation module; the state monitoring unit can monitor the running state of the mechanical mechanism unit and feed back the running state to the power supply and control unit. According to the mechanical antenna communication system based on the double permanent magnets, the electromagnetic radiation of the antenna is directly generated by the mechanical rotation of the permanent magnets, an impedance matching circuit of the traditional antenna is not needed, the antenna efficiency is higher, and the energy consumption is lower.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a mechanical antenna communication system and method based on double permanent magnets.
Background
The ultra Low Frequency (ELF) and ultra Low Frequency (SLF) radio technology has a wide application field, has a strong penetrating power to the earth crust, seawater and other media, and has the advantages of long propagation distance, high reliability, strong anti-interference performance, difficult damage to electromagnetic pulses and the like. However, the radiation efficiency of the existing ultra-low frequency antenna is directly limited by the size of the antenna, so that the low frequency electromagnetic transmission system has the problems of large antenna volume, complex equipment, low radiation efficiency, high energy consumption and the like, and the maneuverability and flexibility of the application of the low frequency electromagnetic transmission system are severely restricted. Such as wisconsin launching pad in the united states, coraa launching pad in russia, etc., both the antenna volume and the floor area are large.
In addition, for the existing mechanical antenna modulation scheme, the modulation idea is mostly to adjust the rotation speed of the driving motor to realize the frequency modulation of the signal. Frequency modulation puts high demands on the performance of the motor and related control circuits, and when the code rate of signals is increased, the energy consumption of the system is obviously increased by frequent speed regulation processes. Therefore, there is room for improvement in the above-described technology.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a dual permanent magnet-based mechanical antenna communication system, in which electromagnetic radiation of an antenna is directly generated by mechanical rotation of a permanent magnet, mechanical energy is directly converted into electromagnetic energy, grounding is not required, an impedance matching circuit of a conventional antenna is not required, and antenna efficiency is high; in addition, the driving motor rotates at a constant speed, the driving circuit is simple, the energy consumption is low, and the amplitude and phase modulation of signals can be realized by changing the included angle of the magnetization directions of the first permanent magnet and the second permanent magnet.
The invention also provides a method applied to the mechanical antenna communication system based on the double permanent magnets.
The mechanical antenna communication system based on the double permanent magnets comprises:
mechanical mechanism unit, mechanical mechanism unit includes from a left side to the right side in proper order: the driving module, the first permanent magnet, the phase modulation module and the second permanent magnet are connected through a transmission mechanism, the driving module can drive the first permanent magnet and the second permanent magnet to rotate at a constant speed, and the phase modulation module can adjust the included angles of the magnetization directions of the first permanent magnet and the second permanent magnet and keep the synchronous rotation of the first permanent magnet and the second permanent magnet;
the power supply and control unit can control the operation of the driving module and the phase modulation module;
and the state monitoring unit can monitor the running state of the mechanical mechanism unit and feed back the running state to the power supply and control unit.
According to the mechanical antenna communication system based on the double permanent magnets, the electromagnetic radiation of the antenna is directly generated by the mechanical rotation of the permanent magnets, and the mechanical energy is directly converted into electromagnetic energy; grounding is not needed, an impedance matching circuit of the traditional antenna is not needed, and the antenna efficiency is high; in addition, the driving motor rotates at a constant speed, the driving circuit is simple, the energy consumption is low, and the amplitude and phase modulation of signals can be realized by changing the included angle of the magnetization directions of the first permanent magnet and the second permanent magnet.
According to the mechanical antenna communication system based on the double permanent magnets, the mechanical mechanism unit, the power supply and control unit and the state monitoring unit form a closed-loop control system.
According to the mechanical antenna communication system based on the double permanent magnets, the power supply and control unit comprises: DC power supply module, Arduino module and motor drive plate, the DC power supply module does the Arduino module with motor drive plate provides working power supply.
According to the mechanical antenna communication system based on the double permanent magnets, the Arduino module can receive message signals of an upper computer, encode the message signals and send instructions to the mechanical mechanism unit.
According to the mechanical antenna communication system based on the double permanent magnets, the mechanical mechanism unit further comprises: the state monitoring unit can collect signals of the sensor and feed back the signals to the power supply and control unit, the grating is arranged on the transmission mechanism, and the electric brush and the slip ring provide control signals for the phase modulation module.
According to the mechanical antenna communication system based on the double permanent magnets, the first permanent magnet and the second permanent magnet are permanent magnets magnetized in the radial direction, and the magnetization direction is that the S pole of the permanent magnet points to the N pole.
The dual permanent magnet-based mechanical antenna communication method according to the second aspect of the present invention can be applied to the dual permanent magnet-based mechanical antenna communication system, and includes the following steps:
s1, modulating signals, namely modulating the amplitude A and the phase B of the harmonic electromagnetic waves when the included angle alpha of the magnetization directions of the first permanent magnet and the second permanent magnet in rotation changes, wherein the modulated signals are expressed as:
A(α)cos(ωt+B(α))；
s2, signal demodulation, comprising:
s201, demodulating amplitude A, performing direct current rectification on the signal, then obtaining a packet network, and extracting a loaded message signal;
s202, phase B demodulation, which multiplies the received signal by a coherent carrier signal having a carrier frequency, and sets the expression of the coherent carrier to cos (ω t + θ). The result after multiplication is:
filtering out AC component to obtain result related to signal phase
In summary, according to the mechanical antenna communication method based on the dual permanent magnets of the second aspect of the present invention, on one hand, grounding is not required, an impedance matching circuit of the conventional antenna is not required, and the antenna efficiency is high; and on the other hand, the radiation signal is subjected to amplitude and phase joint demodulation to extract the information in the original signal to the maximum extent and reduce the error rate in signal transmission.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a dual permanent magnet-based mechanical antenna communication system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power supply and control unit according to an embodiment of the present invention;
FIG. 3 is a diagram of a phase modulation module debugging a first permanent magnet and a second permanent magnet according to an embodiment of the present invention;
FIG. 4 is a second diagram of a phase modulation module tuning a first permanent magnet and a second permanent magnet according to an embodiment of the present invention;
fig. 5 is a partial structural schematic view of a mechanical mechanism unit according to an embodiment of the present invention;
FIG. 6 is a process diagram of a dual permanent magnet based mechanical antenna communication method according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a debugging result of a mechanical antenna communication method based on a double permanent magnet according to an embodiment of the present invention.
Reference numerals:
100-a mechanical antenna communication system based on double permanent magnets, 1-a mechanical mechanism unit, 11-a driving module, 12-a first permanent magnet, 13-a phase modulation module, 14-a second permanent magnet, 15-a transmission mechanism, 2-a power supply and control unit, 21-a direct current power supply module, 22-an Arduino module, 23-a motor driving plate, 3-a state monitoring unit, 4-a sensor, 5-a grating, 6-an electric brush, 7-a slip ring, 8-a limiting disc, 81-a limiting groove, 9-a coupler and 91-a reduction box.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
A dual permanent magnet based mechanical antenna communication system 100 according to an embodiment of the present invention is described below with reference to fig. 1-7. As shown in fig. 1, a dual permanent magnet-based mechanical antenna communication system 100 according to an embodiment of the present invention may include: mechanical mechanism unit 1, power and the control unit 2 and state monitoring unit 3, further, mechanical mechanism unit 1 includes from a left side to the right side in proper order: drive module 11, first permanent magnet 12, phase modulation module 13 and second permanent magnet 14, specifically, drive module 11, first permanent magnet 12, phase modulation module 13 and second permanent magnet 14 are connected through drive mechanism 15. Further, the driving module 11 may drive the first permanent magnet 12 and the second permanent magnet 14 to rotate at a constant speed, so that the dual permanent magnet-based mechanical antenna communication system 100 may stably radiate a carrier signal with a constant frequency to the outside; in addition, amplitude and phase modulation of signals can be realized by changing included angles of the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14, a driving circuit is simple, and energy consumption is low. Further, the phase modulation module 13 can adjust the included angle of the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14 and keep the first permanent magnet 12 and the second permanent magnet 14 rotating synchronously; for example, in a specific embodiment, as shown in fig. 3 and 4, the angle between the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14 is changed from 0 ° to α °, so that the encoded information is loaded on the carrier wave at the same time. Further, the power supply and control unit 2 can control the operations of the driving module 11 and the phase modulation module 13; further, the state monitoring unit 3 may be used to monitor the operation state of the mechanical mechanism unit 1 and feed back to the power supply and control unit 2.
In the existing mechanical antenna modulation scheme, the modulation idea is that the rotation speed of the driving motor is mostly adjusted to realize frequency modulation of signals, but the frequency modulation puts higher requirements on the performance of the motor and related control circuits, and when the code rate of the signals is increased, the energy consumption of the system is obviously increased by a frequent speed regulation process. In the mechanical antenna communication system 100 based on the double permanent magnets, the electromagnetic radiation of the antenna is directly generated by the mechanical rotation of the permanent magnets, and the mechanical energy is directly converted into electromagnetic energy; in addition, amplitude and phase modulation of signals can be realized by changing included angles of the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14, a driving circuit is simple, and energy consumption is low.
According to the dual permanent magnet based mechanical antenna communication system 100 of the present invention, the electromagnetic radiation of the antenna is directly generated by the mechanical rotation of the permanent magnet, and the mechanical energy is directly converted into electromagnetic energy; grounding is not needed, an impedance matching circuit of the traditional antenna is not needed, and the antenna efficiency is high; in addition, amplitude and phase modulation of signals can be realized by changing included angles of the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14, a driving circuit is simple, and energy consumption is low.
According to the mechanical antenna communication system 100 based on the double permanent magnets of one embodiment of the present invention, as shown in fig. 1, the mechanical mechanism unit 1, the power supply and control unit 2 and the state monitoring unit 3 constitute a closed-loop control system.
According to the mechanical antenna communication system 100 based on the dual permanent magnets of one embodiment of the present invention, as shown in fig. 2, the power and control unit 2 may include: DC power supply module 21, Arduino module 22 and motor drive board 23, further, DC power supply module 21 provides working power supply for Arduino module 22 and motor drive board 23.
According to the mechanical antenna communication system 100 based on the dual permanent magnets of the embodiment of the present invention, the Arduino module 22 may receive a message signal from an upper computer (not shown in the figure), encode the message signal, and send an instruction to the mechanical mechanism unit 1.
According to the mechanical antenna communication system 100 based on the dual permanent magnets of one embodiment of the present invention, as shown in fig. 5, the mechanical mechanism unit 1 may further include: the sensor 4, the grating 5, the brushes 6 and the slip rings 7, in particular, the status monitoring unit 3 can collect the signal of the sensor 4 and feed back to the power supply and control unit 2. For example, in a specific embodiment, the sensor 4 may be a photoelectric sensor 4 for collecting a rotation speed signal, a phase modulation angle signal, and the like in the mechanical mechanism unit 1 and feeding back the signals to the power supply and control unit 2. Further, the grating 5 is arranged on the transmission mechanism 15, and further, the brush 6 and the slip ring 7 provide a control signal for the phase modulation module 13. Further, in a specific embodiment, the phase modulation module 13 may be a reduction motor. Further, the limiting disc 8 is fixedly connected with the reduction box 91 of the reducing motor, so that phase modulation operation of the mechanical antenna communication system 100 can be realized through the matching of the reducing motor and the limiting disc 8. Further, the limiting disc 8 is provided with a sliding groove 81, so that the effect of limiting the rotation angle of the second permanent magnet 14 can be achieved when the speed reduction motor drives the second permanent magnet 14 to rotate. Further, the coupling 9 is sleeved on the transmission mechanism 15.
It should be noted that the phase modulation module 13 may also adopt a phase modulation method such as pneumatic or hydraulic.
According to the mechanical antenna communication system 100 based on the double permanent magnets of the embodiment of the present invention, the driving module 11 may adopt a dc motor, and the dc motor may drive the transmission mechanism 15 to rotate and the photoelectric sensor 4 is matched with the grating 15 fixedly connected to the transmission mechanism 15 to realize the closed-loop control of the rotation speed.
According to the mechanical antenna communication system 100 based on the double permanent magnets of one embodiment of the present invention, the first permanent magnet 12 and the second permanent magnet 14 are permanent magnets magnetized in radial directions, and the magnetization directions are such that the S poles of the permanent magnets point to the N poles.
In summary, according to the mechanical antenna communication system 100 based on dual permanent magnets of the present invention, the electromagnetic radiation of the antenna is directly generated by the mechanical rotation of the permanent magnets, and the mechanical energy is directly converted into electromagnetic energy; grounding is not needed, an impedance matching circuit of the traditional antenna is not needed, and the antenna efficiency is high; in addition, amplitude and phase modulation of signals can be realized by changing included angles of the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14, a driving circuit is simple, and energy consumption is low.
The invention also provides a mechanical antenna communication method based on double permanent magnets, as shown in fig. 6, the method is applied to any one of the above mechanical antenna communication systems 100 based on double permanent magnets, and comprises the following steps:
s1, modulating the amplitude a and the phase B of the harmonic electromagnetic wave when the angle α between the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14 is changed, where the modulated signal is expressed as:
A(α)cos(ωt+B(α))；
s2, signal demodulation, comprising:
s201, demodulating amplitude A, performing direct current rectification on the signal, then obtaining a packet network, and extracting a loaded message signal;
s202, phase B demodulation, which multiplies the received signal by a coherent carrier signal having a carrier frequency, and sets the expression of the coherent carrier to cos (ω t + θ). The result after multiplication is:
filtering out AC component to obtain result related to signal phase
It should be noted that the included angle α between the magnetization directions of the first permanent magnet 12 and the second permanent magnet 14 varies from 0 ° to 180 °.
Further, as shown in fig. 7, the modulation test of the ultra-low frequency electromagnetic wave can be performed by the mechanical antenna communication method based on the double permanent magnets of the present invention, that is, the cyclic code signal of "01010 … …" can be sent out by the mechanical antenna, so that the amplitude and phase of the signal can be effectively adjusted.
Further, according to the mechanical antenna communication method based on the double permanent magnets in the second aspect of the invention, a mode of jointly demodulating the amplitude and the phase of the radiation signal is adopted, when the amplitude signal of the antenna far away from the radiation source is weak, the phase information of the waveform can still be extracted, and the message signal loaded on the waveform can be demodulated, so that the information in the waveform can be extracted to the maximum extent, and the error rate in transmission can be reduced.
In summary, according to the mechanical antenna communication method based on the dual permanent magnets of the second aspect of the present invention, on one hand, grounding is not required, an impedance matching circuit of the conventional antenna is not required, and the antenna efficiency is high; and on the other hand, the radiation signal is subjected to amplitude and phase joint demodulation to extract the information in the original signal to the maximum extent and reduce the error rate in signal transmission.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A dual permanent magnet based mechanical antenna communication system, comprising:
mechanical mechanism unit, mechanical mechanism unit includes from a left side to the right side in proper order: the driving module, the first permanent magnet, the phase modulation module and the second permanent magnet are connected through a transmission mechanism, the driving module can drive the first permanent magnet and the second permanent magnet to rotate at a constant speed, and the phase modulation module can adjust the included angles of the magnetization directions of the first permanent magnet and the second permanent magnet and keep the synchronous rotation of the first permanent magnet and the second permanent magnet;
the power supply and control unit can control the operation of the driving module and the phase modulation module;
and the state monitoring unit can monitor the running state of the mechanical mechanism unit and feed back the running state to the power supply and control unit.
2. The dual permanent magnet based mechanical antenna communication system of claim 1, wherein the mechanical mechanism unit, the power and control unit and the status monitoring unit constitute a closed loop control system.
3. The dual permanent magnet-based mechanical antenna communication system of claim 2, wherein the power and control unit comprises: DC power supply module, Arduino module and motor drive plate, the DC power supply module does the Arduino module with motor drive plate provides working power supply.
4. The dual permanent magnet based mechanical antenna communication system of claim 3, wherein the Arduino module is capable of receiving a message signal from an upper computer, encoding the message signal and then sending an instruction to the mechanical mechanism unit.
5. The dual permanent magnet-based mechanical antenna communication system of claim 4, wherein the mechanical mechanism unit further comprises: the state monitoring unit can collect signals of the sensor and feed back the signals to the power supply and control unit, the grating is arranged on the transmission mechanism, and the electric brush and the slip ring provide control signals for the phase modulation module.
6. The dual permanent magnet-based mechanical antenna communication system of claim 1, wherein the first permanent magnet and the second permanent magnet are radially magnetized permanent magnets with the magnetization direction such that the S-pole of the permanent magnet points to the N-pole.
7. A dual permanent magnet based mechanical antenna communication method, which can be applied to the dual permanent magnet based mechanical antenna communication system of any one of claims 1-6, comprising the following steps:
s1, modulating signals, namely modulating the amplitude A and the phase B of the harmonic electromagnetic waves when the included angle alpha of the magnetization directions of the first permanent magnet and the second permanent magnet in rotation changes, wherein the modulated signals are expressed as:
A(α)cos(ωt+B(α))；
s2, signal demodulation, comprising:
s201, demodulating amplitude A, performing direct current rectification on the signal, then obtaining a packet network, and extracting a loaded message signal;
s202, phase B demodulation, which multiplies the received signal by a coherent carrier signal having a carrier frequency, and sets the expression of the coherent carrier to cos (ω t + θ). The result after multiplication is:
filtering out AC component to obtain result related to signal phase
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| CN114844751A (en) * | 2022-04-22 | 2022-08-02 | 西安电子科技大学 | 2FSK signal modulation system based on double mechanical antennas |
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| CN113595660A (en) * | 2021-07-28 | 2021-11-02 | 南京航空航天大学 | ASK signal modulation system and method based on mechanical antenna array |
| CN114844751A (en) * | 2022-04-22 | 2022-08-02 | 西安电子科技大学 | 2FSK signal modulation system based on double mechanical antennas |
| CN114844751B (en) * | 2022-04-22 | 2023-06-30 | 西安电子科技大学 | 2FSK signal modulation system based on double mechanical antennas |
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