CN111245451A - Low-consumption mechanical antenna ultralow frequency communication device - Google Patents
Low-consumption mechanical antenna ultralow frequency communication device Download PDFInfo
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- CN111245451A CN111245451A CN202010037905.1A CN202010037905A CN111245451A CN 111245451 A CN111245451 A CN 111245451A CN 202010037905 A CN202010037905 A CN 202010037905A CN 111245451 A CN111245451 A CN 111245451A
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- 238000004891 communication Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000007493 shaping process Methods 0.000 claims description 20
- 238000010586 diagram Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/03—Constructional details, e.g. casings, housings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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Abstract
The invention discloses a low-consumption mechanical antenna ultralow frequency communication device, belonging to the technical field of ultralow frequency wireless communication, the ultralow frequency communication device comprises an ultralow frequency signal transmitting module and an ultralow frequency signal receiving module, the ultralow frequency signal transmitting module transmits the generated ultralow frequency signal to the ultralow frequency signal receiving module, the ultralow frequency signal receiving module receives the ultralow frequency signal generated by the transmitting module and processes the received ultralow frequency signal to obtain the low frequency signal information generated by the ultralow frequency signal transmitting module, the ultralow frequency signal transmitting module comprises a motor and a permanent magnet, the permanent magnet is used as a transmitting source and can be used permanently without considering the impedance matching problem, the omni-directionality of the signal receiving by adopting a three-axis orthogonal coil is better, the coil has a filtering function, the collected signal has less noise, the device adopts ultralow frequency communication, the device has the advantages of small propagation loss, long transmission distance and strong anti-interference capability, and the system of the device adopts short-time Fourier change and can observe the frequency transformation of communication signals in real time.
Description
Technical Field
The invention relates to the technical field of ultralow frequency wireless communication, in particular to a low-consumption mechanical antenna ultralow frequency communication device.
Background
Ultra low frequency communication technology is technology for wireless communication using ultra/very low frequency bands in the radio spectrum. Wherein, the ultra-low frequency (30 Hz-300 Hz) wave band has the following advantages: (1) path loss in water and soil is small; (2) the method is not sensitive to unreliable propagation conditions, and the propagation is stable and reliable; (3) and the anti-interference capability is strong. Based on the advantages of the ultra-low frequency band, the ultra-low frequency communication has the following advantages: (1) the attenuation of the ultra-low frequency signal in the earth crust is far lower than that of other common low frequency signals, so that the ultra-low frequency signal has higher penetration depth; (2) the ultra-low frequency signal is not sensitive to unreliable propagation conditions, is stably and reliably propagated, and is one of a few communication means free from electromagnetic wave damage; (3) the anti-interference capability is strong, and if the ultra-low frequency communication is attempted to be interfered, the power output is stronger than that of the ultra-low frequency communication signal.
Although the ultra low frequency communication has such many advantages, the most important problem of the ultra low frequency communication is how to realize the effective generation of the ultra low frequency electromagnetic wave.
The traditional ELF-ULF antenna is an electric field antenna or a magnetic field antenna, wherein the electric field antenna needs electric dipoles to radiate electromagnetic waves, and the magnetic field antenna needs coils to radiate the electromagnetic waves. In both cases, the radiation resistance value is low, and a large oscillation current is required to generate a significant radiation power. The ohmic resistance of the antenna is only small with the superconducting structure, the energy dissipated by these currents, but the use of superconducting structures is costly in terms of materials and cooling. The huge size of the antenna is extremely easy to destroy in war period, which is not beneficial to military use.
Disclosure of Invention
According to the problems existing in the prior art, the invention discloses a low-consumption mechanical antenna ultralow frequency communication device, which comprises an ultralow frequency signal transmitting module and an ultralow frequency signal receiving module;
the ultra-low frequency signal transmitting module transmits the generated ultra-low frequency signal to the ultra-low frequency signal receiving module;
the ultra-low frequency signal receiving module receives the ultra-low frequency signal generated by the transmitting module and processes the received ultra-low frequency signal to obtain the low frequency signal information generated by the ultra-low frequency signal transmitting module.
Further: the ultra-low frequency signal transmitting module comprises a motor and a permanent magnet;
the motor drives the permanent magnet to rotate to generate a time-varying magnetic field and transmits a magnetic field signal to the ultralow frequency signal receiving module;
the ultra-low frequency signal receiving module comprises a magnetic signal sensor, an amplifying and shaping filter circuit, a data acquisition unit and an upper computer;
the magnetic signal sensor collects magnetic field signals emitted by the ultra-low frequency signal emitting module and converts the magnetic field signals into voltage signals, the collected voltage signals are transmitted to the amplifying and shaping filter circuit to be filtered, shaped and amplified, the amplifying and shaping filter circuit transmits the processed voltage signals to the data collecting unit, the data collecting unit converts the collected and processed voltage signals into digital signals and transmits the digital signals to the upper computer, and the upper computer performs Fourier transform on the transmitted digital signals to obtain a frequency domain diagram of the ultra-low frequency signal emitting module.
Further, the magnetic signal sensor adopts a three-axis orthogonal square coil.
Further: the ultra-low frequency signal transmitting module further comprises a chuck and a rack, the permanent magnet is loaded through the chuck, the motor is fixed through the rack, and the permanent magnet is driven to rotate through the chuck connected with the motor to generate a time-varying magnetic field.
Further: the amplifying and shaping filter circuit comprises a filter circuit and an amplifying and shaping circuit, and the filter circuit is electrically connected with the amplifying and shaping circuit.
Due to the adoption of the technical scheme, the low-consumption mechanical antenna ultralow frequency communication device provided by the invention has the advantages that the signal transmitting module can realize a time-varying magnetic field with the same working frequency as a motor, the permanent magnet is used as a transmitting source and can be permanently used without considering the impedance matching problem, the omni-directionality of signal receiving by adopting the triaxial orthogonal coil is better, the coil has a filtering function, the collected signal has less noise, and the signal-to-noise ratio of the receiving antenna is improved. The device adopts ultra-low frequency communication, has small propagation loss, long transmission distance and strong anti-interference capability, and the system of the device adopts short-time Fourier change, and can observe the frequency conversion of communication signals in real time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a low-loss mechanical antenna ultra-low frequency communication device according to the present invention;
FIG. 2 is a schematic diagram of the ultra-low frequency magnetic field signal generating module according to the present invention;
FIG. 3 is a schematic structural diagram of an ultra-low frequency magnetic field signal receiving module according to the present invention;
FIG. 4 is a time-frequency domain diagram;
FIG. 5 is a filter circuit diagram;
fig. 6 is an enlarged shaping circuit diagram.
In the figure: 1. the device comprises a chuck, 2, a motor, 3, a frame, 4, a permanent magnet, 5, a square coil frame, 6, a three-axis orthogonal coil, 7, a data acquisition card, 8, an amplifying, shaping and filtering circuit, 9 and an upper computer.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a low-consumption mechanical antenna ultralow frequency communication device in the invention, and the low-consumption mechanical antenna ultralow frequency communication device comprises an ultralow frequency magnetic field signal generating module and an ultralow frequency magnetic field signal receiving module.
Fig. 2 is a schematic structural diagram of an ultra low frequency magnetic field signal generating module according to the present invention, wherein the ultra low frequency magnetic field signal generating module comprises: the device comprises a chuck 1, a motor 2, a rack 3 and a permanent magnet 4, wherein the rack 3 is used for fixing the motor 2; the chuck 1 is used for loading the permanent magnet 4, and the permanent magnet 4 is driven to rotate by the chuck 3 connected with the motor 2 to generate a time-varying magnetic field; the magnetic induction intensity and the electric field generated by the rotating permanent magnet at the distance r are respectively as follows:
and
the attenuation law of the electromagnetic wave radiation field excited by the traditional antenna is the same. It is therefore reasonably feasible that the rotating permanent magnet acts as a transmitting unit for a mechanical antenna ultra low frequency communication device.
Fig. 3 is a schematic diagram of an ultra-low frequency magnetic field signal receiving module according to the present invention, which includes a square coil frame 5, a three-axis orthogonal coil 6, a data acquisition card 7, an amplifying, shaping, and filtering circuit 8, and an upper computer 9, wherein the square frame 5 is used for fixing the three-axis orthogonal coil 6; the three-axis orthogonal coil 6 converts the acquired magnetic signals into voltage signals, transmits the voltage signals to the amplifying, shaping and filtering circuit 8 for filtering, shaping and amplifying, and transmits the processed voltage signals to the data acquisition card 7, the data acquisition card 7 converts the acquired and processed voltage signals into digital signals and transmits the digital signals to the upper computer 9, the upper computer 9 performs Fourier transform on the transmitted digital signals to obtain a frequency domain diagram of the ultra-low frequency signal transmitting module, and the time-frequency domain diagram is shown in FIG. 4.
The three square coils in the three-axis orthogonal coil 6 are all the same in side length, material, single-turn wire diameter and number of turns, and are designed into the three-axis orthogonal coil so as to collect space magnetic induction signals more comprehensively, wherein the design method of each square coil is as follows: the design selects the antenna impedance of 1 omega-1 mH, wherein the resistance calculation formula is
The inductance is calculated by the formula
The square coil 6 is designed from these two equations and design constraints.
The amplifying and shaping filter circuit comprises a filter circuit and an amplifying and shaping circuit.
FIG. 5 is a filter circuit diagram including resistor R1, resistor R2, capacitor C1, capacitor C2, and amplifier U1; one end of the resistor R1 is connected with the input, and the other end of the resistor R1 is connected with one end of the resistor R2 and one end of the capacitor C2; the other end of the resistor R2 is connected with the other end of the capacitor C1 and the positive input end of an amplifier U1; the other end of the capacitor C1 is connected with the other end of the capacitor C2 and the ground; the negative input end of the amplifier U1 is connected with a power supply VCC, and the output end of the amplifier U1 is connected with the power supply VCC and the power supply Vff.
Fig. 6 is an amplification and shaping circuit diagram including an amplifier U2, an amplifier U3, an amplifier U4, an amplifier U5, a resistor R3, a resistor R4, a resistor R5, and a resistor R6; one end of a resistor R3 is connected with an input, the other end of the resistor R3 is connected with a positive input end of the amplifier U3, a negative input end of the amplifier U3 is connected with an output end, a power supply VCC and one end of a resistor R5, one end of a resistor R4 is connected with the input, the other end of the resistor R4 is connected with a positive input end of the amplifier U4, a negative input end of an amplifier U4 is connected with an output end and one end of a resistor R6, the other end of the resistor R6 is connected with a positive input end of an amplifier U5, the other end of a resistor R5 is connected with a negative input end of an amplifier U5, an output end of an amplifier U5 is connected with a negative input end of an amplifier U6, and a positive input end of an amplifier U36.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A low-loss mechanical antenna ultra-low frequency communication device, characterized by: the system comprises an ultra-low frequency signal transmitting module and an ultra-low frequency signal receiving module;
the ultra-low frequency signal transmitting module transmits the generated ultra-low frequency signal to the ultra-low frequency signal receiving module;
the ultra-low frequency signal receiving module receives the ultra-low frequency signal generated by the transmitting module and processes the received ultra-low frequency signal to obtain the low frequency signal information generated by the ultra-low frequency signal transmitting module.
2. A low-loss mechanical antenna ultra-low frequency communication device as recited in claim 1, further characterized by:
the ultra-low frequency signal transmitting module comprises a motor and a permanent magnet;
the motor drives the permanent magnet to rotate to generate a time-varying magnetic field and transmits a magnetic field signal to the ultralow frequency signal receiving module;
the ultra-low frequency signal receiving module comprises a magnetic signal sensor, an amplifying and shaping filter circuit, a data acquisition unit and an upper computer;
the magnetic signal sensor collects magnetic field signals emitted by the ultra-low frequency signal emitting module and converts the magnetic field signals into voltage signals, the collected voltage signals are transmitted to the amplifying and shaping filter circuit to be filtered, shaped and amplified, the amplifying and shaping filter circuit transmits the processed voltage signals to the data collecting unit, the data collecting unit converts the collected and processed voltage signals into digital signals and transmits the digital signals to the upper computer, and the upper computer performs Fourier transform on the transmitted digital signals to obtain a frequency domain diagram of the ultra-low frequency signal emitting module.
3. A low-loss mechanical antenna ultra-low frequency communication device as recited in claim 2, further characterized by: the magnetic signal sensor adopts a three-axis orthogonal square coil.
4. A low-loss mechanical antenna ultra-low frequency communication device as recited in claim 2, further characterized by: the ultra-low frequency signal transmitting module further comprises a chuck and a rack, the permanent magnet is loaded through the chuck, the motor is fixed through the rack, and the permanent magnet is driven to rotate through the chuck connected with the motor to generate a time-varying magnetic field.
5. A low-loss mechanical antenna ultra-low frequency communication device as recited in claim 2, further characterized by: the amplifying and shaping filter circuit comprises a filter circuit and an amplifying and shaping circuit, and the filter circuit is electrically connected with the amplifying and shaping circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037905.1A CN111245451B (en) | 2020-01-14 | 2020-01-14 | Low-consumption mechanical antenna ultralow frequency communication device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037905.1A CN111245451B (en) | 2020-01-14 | 2020-01-14 | Low-consumption mechanical antenna ultralow frequency communication device |
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| CN111245451A true CN111245451A (en) | 2020-06-05 |
| CN111245451B CN111245451B (en) | 2021-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768907A (en) * | 2020-12-28 | 2021-05-07 | 南京步微通信设备有限公司 | Magnetic-electromechanical coupling type miniaturized signal receiving antenna and implementation method |
| CN114095323A (en) * | 2021-10-13 | 2022-02-25 | 西安电子科技大学 | Mechanical antenna time-frequency combined modulation system, method, equipment, medium and terminal |
| CN114603407A (en) * | 2022-04-08 | 2022-06-10 | 山东农业大学 | Online detection device and method for sharpening of drum-type chopping roller moving knife |
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| CN110581355A (en) * | 2019-09-05 | 2019-12-17 | 北京航空航天大学 | Flexible mechanical antenna communication system based on electret |
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2020
- 2020-01-14 CN CN202010037905.1A patent/CN111245451B/en not_active Expired - Fee Related
Patent Citations (3)
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| CN103441803A (en) * | 2013-09-10 | 2013-12-11 | 北京科技大学 | Underground low-frequency wireless communication system based on low-power small electric antenna |
| CN106788558A (en) * | 2016-11-22 | 2017-05-31 | 北京信息科技大学 | A kind of ground through communication system |
| CN110581355A (en) * | 2019-09-05 | 2019-12-17 | 北京航空航天大学 | Flexible mechanical antenna communication system based on electret |
Non-Patent Citations (1)
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| 张多佳: "《超低频率机械天线机理及调制方法研究》", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112768907A (en) * | 2020-12-28 | 2021-05-07 | 南京步微通信设备有限公司 | Magnetic-electromechanical coupling type miniaturized signal receiving antenna and implementation method |
| CN112768907B (en) * | 2020-12-28 | 2022-06-21 | 南京步微通信设备有限公司 | Magnetic-electromechanical coupling type miniaturized signal receiving antenna and manufacturing method thereof |
| CN114095323A (en) * | 2021-10-13 | 2022-02-25 | 西安电子科技大学 | Mechanical antenna time-frequency combined modulation system, method, equipment, medium and terminal |
| CN114095323B (en) * | 2021-10-13 | 2023-02-03 | 西安电子科技大学 | Mechanical antenna time-frequency combined modulation system, method, equipment, medium and terminal |
| CN114603407A (en) * | 2022-04-08 | 2022-06-10 | 山东农业大学 | Online detection device and method for sharpening of drum-type chopping roller moving knife |
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| CN111245451B (en) | 2021-11-26 |
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