CN109244625A - For the received magnetic antenna device of underwater ultra-low frequency signal - Google Patents
For the received magnetic antenna device of underwater ultra-low frequency signal Download PDFInfo
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- CN109244625A CN109244625A CN201811080531.0A CN201811080531A CN109244625A CN 109244625 A CN109244625 A CN 109244625A CN 201811080531 A CN201811080531 A CN 201811080531A CN 109244625 A CN109244625 A CN 109244625A
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- magnetic antenna
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- low frequency
- frequency signal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/04—Adaptation for subterranean or subaqueous use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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Abstract
The invention discloses one kind to be used for the received magnetic antenna device of underwater ultra-low frequency signal, including is arranged in parallel and at interval upper layer aerial array and lower layer's aerial array up and down；Upper layer aerial array includes the first magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic antenna of square distribution in same level；Lower layer's aerial array is identical as upper layer antenna array structure, and slow wave material is filled between each magnetic antenna.The present invention takes array antenna design, it is divided into upper layer and lower layer, signal omnidirectional can be achieved to receive, simultaneously, it according to magnetic antenna directionality filtering characteristic and shows the difference of each magnetic antenna output waveform intensity and spectrum intensity, determines that the incoming wave of ultra-low frequency signal comes to and determining that incoming wave signal that two magnetic antennas up and down close to incoming wave acquire is the relatively authentic specimen at the moment, obtained sample is handled by filtering and noise cancellation again, obtains ultra-low frequency signal.
Description
Technical field
The present invention relates to deep water fields of communication technology, more particularly to one kind is for the received magnetic day of underwater ultra-low frequency signal
Line apparatus.
Background technique
Ultralow frequency (SLF) communication is the currently the only deep water communication technology in China, and submarine navigation device is existed using trailing aerial
It is underwater to receive ultralow frequency radio signal, reach the one-way communication of the water surface and submarine navigation device.Trailing aerial is a kind of electric antenna,
Although can be realized the reception of ultra-low frequency signal, the about several hundred rice of overall antenna length degree, existing main problem is as follows:
1. the mobility that trailing aerial seriously affects submarine navigation device
Since trailing aerial is currently without omnidirectional's reception is solved the problems, such as, submarine navigation device course must be adjusted when collecting mail
Onto defined course, there is serious limitation to the course of submarine navigation device.Submarine navigation device wake flow is in after trailing aerial release
In, caused trailing aerial to swing by wake effect, antenna generates electromagnetic interference noise, influences submarine navigation device collection of letters quality, makes
The speed of a ship or plane is restricted when collecting mail at submarine navigation device.
2. the safety that trailing aerial seriously affects submarine navigation device
Trailing aerial system is discharged and is recycled using hoisting mechanism, and hoisting system can issue noise at work, is increased
A possibility that big submarine navigation device Acoustic exposure.After trailing aerial release under water behind aircraft, length reaches 800m, can be in spy
It is wound in different situation with tail structures collisions such as propellers, and is easy to be collided by trawler, water surface merchant ship etc., cause to navigate under water
Row device parts damages.Conflict mutually when the equipments uses such as trailing aerial and towed sonar, it is not possible to while using both equipments,
Otherwise it will cause the winding of towing part to pull, or even fall off.
3. the real-time that trailing aerial seriously affects communication.
The non-omnidirectional antenna of trailing aerial could only communicate after designated time submarine navigation device adjusts course, Wu Faquan
When, in real time collect mail.For submarine navigation device motor-driven limited or when can not in emergency circumstances adjust course, liaison can not be timely
Reach, and miss this collection of letters to wait next collection of letters point.The real-time of communication not can guarantee.
The shortcomings that in order to overcome trailing aerial, foreign countries have the submarine navigation device using magnetic antenna as receiving antenna,
But communications band is very low frequency (VLF), is also unable to reach the purpose that ultralow frequency frequency band signals are received by using magnetic antenna.
However ultralow frequency collection of letters effect depends on two factors, one is the signal strength in collection of letters depth, the second is receiving
Believe the signal-to-noise ratio in depth.At present by calculating and test, can reliably be collected mail in 100 meters of depth using single magnetic antenna,
Signal strength and magnetic antenna sensitivity index are up to standard, and signal-to-noise ratio also complies with the collection of letters and requires.But collection of letters antenna is mounted on water
When on lower vehicle hull, submarine navigation device noise is by the signal-to-noise ratio in extreme influence collection of letters depth, so that signal-to-noise ratio index is not
Meet to collect mail and require.Under the premise of the indexs such as magnetic field antenna sensitivity are met the requirements, to realize that magnetic antenna navigates by water under water
The problem of function of reception ultra-low frequency signal on device, most critical is the noise for how overcoming submarine navigation device itself to generate.
Summary of the invention
The object of the present invention is to provide one kind to be used for the received magnetic antenna device of underwater ultra-low frequency signal.
For achieving the above object, the technical scheme is that a kind of be used for the received magnetic of underwater ultra-low frequency signal
Property antenna assembly, including it is arranged in parallel and at interval upper layer aerial array and lower layer's aerial array up and down；Upper layer aerial array packet
Include the first magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic day of square distribution in same level
Line；Lower layer's aerial array is identical as upper layer antenna array structure, including the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetism
Antenna, the 8th magnetic antenna, the 5th magnetic antenna are parallel to the first magnetic antenna, and the 6th magnetic antenna is parallel to the second magnetic day
Line, the 7th magnetic antenna are parallel to third magnetic antenna, and the 8th magnetic antenna is parallel to the 4th magnetic antenna；Described first is magnetic
Antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic antenna, the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetic
Property antenna, the 8th magnetic antenna between be filled with slow wave material.
One kind as this programme is preferred, first magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th
Magnetic antenna, the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetic antenna, the 8th magnetic antenna are that induction type magnetic field passes
Sensor.
The ultra-low frequency signal record principle of the magnetic antenna device: aircraft under water is arranged in the aerial array
On, according to magnetic antenna directionality filtering characteristic and show the difference of each magnetic antenna output waveform intensity and spectrum intensity
It is different, determine the incoming wave of ultra-low frequency signal come to, and determine close to incoming wave two magnetic antennas up and down acquire incoming wave signal be
Compared with authentic specimen；Obtained sample is handled by filtering and noise cancellation again, obtains ultra-low frequency signal.
The beneficial effects of the present invention are:
1, the present invention using induction type magnetic field sensor be core component as ultralow frequency collection of letters antenna, it is easy to accomplish with it is underwater
The integrated design of aircraft, the sensor have very high receiving sensitivity, can satisfy the requirement of SLF communication, and work
It does not require submarine navigation device to reduce cruising speed and submerged depth when making, can guarantee the mobility of submarine navigation device and hidden
Property.
2, the present invention takes array antenna design, and using 8 magnetic field sensor group battle arrays, one square of every 4 compositions is flat
Face battle array is divided into upper layer and lower layer, and group battle array, which designs, can be achieved the reception of signal omnidirectional, obtains multiple signals and noise sample, is conducive to subsequent
Signal processing and noise suppressed.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Below in conjunction with attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.
As shown in Figure 1, a kind of be used for the received magnetic antenna device of underwater ultra-low frequency signal, including parallel up and down and interval
The upper layer aerial array and lower layer's aerial array of setting；Upper layer aerial array includes first of square distribution in same plane
Magnetic antenna U1, the second magnetic antenna U2, third magnetic antenna U3, the 4th magnetic antenna U4；Lower layer's aerial array and upper layer day
Linear array structure is identical, including the 5th magnetic antenna D1, the 6th magnetic antenna D2, the 7th magnetic antenna D3, the 8th magnetic antenna
D4, the 5th magnetic antenna are parallel to the first magnetic antenna, and the 6th magnetic antenna is parallel to the second magnetic antenna, the 7th magnetic antenna
It is parallel to third magnetic antenna, the 8th magnetic antenna is parallel to the 4th magnetic antenna；First magnetic antenna, the second magnetic day
Line, third magnetic antenna, the 4th magnetic antenna, the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetic antenna, the 8th magnetism
Slow wave material (not shown) is filled between antenna.
First magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic antenna, the 5th magnetic antenna,
6th magnetic antenna, the 7th magnetic antenna, the 8th magnetic antenna are induction type magnetic field sensor.
Submarine navigation device noise is near field noise, is decayed with distance at cube, and decaying is quickly.And signal of communication belongs to far
Field signal is substantially decayed with the first power of distance, is decayed slower.Therefore, communication signal strength is remote on the magnetic antenna of upper layer
The intensity being better than on lower layer's magnetic antenna.Conversely, intensity of the submarine navigation device noise on lower layer's magnetic antenna is much larger than upper layer
Intensity on magnetic antenna.
Two magnetic antennas for being mutually perpendicular to arrange in the horizontal plane can receive the signal in the plane, therefore four with omnidirectional
The aerial array of a array-element antenna composition is that omnidirectional receives in the horizontal direction, and each come to magnetic field signal at least by two
Magnetic antenna receives, and can obtain two sample datas.And for above-mentioned magnetic antenna device, for any one incoming wave side
To magnetic field signal, at least exist four magnetic antennas can receive signal, at most all 8 magnetic antennas receive signal.
With horizontal arrival bearing perpendicular to the signal S1 (f, d, n) of U4 for, according to the directional characteristic of array-element antenna, U4
U2 D4 D2 can receive signal S1 (f, d, n) in the maximum gain direction of directional diagram.
Under above situation, upper layer array directivity matrix is defined are as follows:
Lower layer's array directivity matrix are as follows:
This directionality rank of matrix is 2, and conditional number is fine.
If arrival bearing is diagonal, upper layer array directivity matrix is
Similarly lower layer's array directivity matrix are as follows:
This direction matrix conditional number is very poor, order 1.
With horizontal arrival bearing perpendicular to the signal S1 (f, d, n) of U4 for, since signal is propagated from left to right, filling
Distance L1 is travelled in material, then according to the filtering characteristic of above packing material, can calculate signal on distance L1
Attenuation K1 (f).To release the gain matrix of upper layer antenna array:
The similarly gain matrix of lower layer's antenna array are as follows:
By above-mentioned matrix can be used to distinguish the level of signal come to, meanwhile, packing material filtering gain can be passed through
Get off on the sub-signal of difference section to.
Assuming that S1 (f, d, n) is simple signal at a certain moment, without loss of generality, it is believed that multiple-frequency signal is by multiple lists
Frequency signal composition, the then signal matrix that four magnetic antennas in upper layer export are as follows:
Sout (U)=G (U) S1 (f, d, n)+Gm (U)
By signal matrix formula it can be concluded that, since magnetic antenna directionality filtering characteristic and packing material filtering are special
Property, and show the difference of four magnetic antenna output waveform intensity and spectrum intensity, incoming wave can be carried out to S1 (f, d, n)
The determination in direction, and determine that the signal acquired on U4/D4 antenna is relatively authentic specimen of the S1 (f, d, n) at the moment, it can use
In subsequent filtering and noise cancellation.Similarly for the noise signal propagated from below to up, lower layer's aerial array inductive signal
It can produce the amplitude difference of certain decibel higher than upper layer respective antenna.This amplitude difference is in the amplitude that time domain representation is time domain waveform
It is worth, while the difference of amplitude can also be shown as on frequency domain.Upper layer and lower layer respective antenna occur time domain waveform it is similar but
It is the signal that wave-shape amplitude and spectrum amplitude all differ certain decibel, it may be considered that being obtained in specific time period on lower layer's antenna
One sample of noise.Finally, obtained sample is handled by filtering and noise cancellation, obtain ultra-low frequency signal.
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to the scope of the present invention.
Claims (3)
1. one kind is used for the received magnetic antenna device of underwater ultra-low frequency signal, which is characterized in that including parallel up and down and interval
The upper layer aerial array and lower layer's aerial array of setting；Upper layer aerial array includes of square distribution in same level
One magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic antenna；Lower layer's aerial array and upper layer aerial array
Structure is identical, including the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetic antenna, the 8th magnetic antenna, the 5th magnetic antenna
It is parallel to the first magnetic antenna, the 6th magnetic antenna is parallel to the second magnetic antenna, and the 7th magnetic antenna is parallel to third magnetism
Antenna, the 8th magnetic antenna are parallel to the 4th magnetic antenna；First magnetic antenna, the second magnetic antenna, third magnetism day
Filled with slow between line, the 4th magnetic antenna, the 5th magnetic antenna, the 6th magnetic antenna, the 7th magnetic antenna, the 8th magnetic antenna
Wave material.
2. as described in claim 1 a kind of for the received magnetic antenna device of underwater ultra-low frequency signal, which is characterized in that institute
State the first magnetic antenna, the second magnetic antenna, third magnetic antenna, the 4th magnetic antenna, the 5th magnetic antenna, the 6th magnetic day
Line, the 7th magnetic antenna, the 8th magnetic antenna are induction type magnetic field sensor.
3. as described in claim 1 a kind of for the received magnetic antenna device of underwater ultra-low frequency signal, which is characterized in that institute
It states the ultra-low frequency signal record principle of magnetic antenna device: the aerial array being arranged in aircraft under water, according to magnetism
Antenna directivity filtering characteristic and the difference for showing each magnetic antenna output waveform intensity and spectrum intensity, determine ultralow frequency
The incoming wave of signal comes to and determining that incoming wave signal that two magnetic antennas up and down close to incoming wave acquire is at the moment compared with can
Believe sample；Obtained sample is handled by filtering and noise cancellation again, obtains ultra-low frequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080531.0A CN109244625B (en) | 2018-09-17 | 2018-09-17 | Magnetic antenna device for receiving underwater ultralow frequency signals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811080531.0A CN109244625B (en) | 2018-09-17 | 2018-09-17 | Magnetic antenna device for receiving underwater ultralow frequency signals |
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| Publication Number | Publication Date |
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| CN109244625A true CN109244625A (en) | 2019-01-18 |
| CN109244625B CN109244625B (en) | 2021-04-06 |
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| CN201811080531.0A Active CN109244625B (en) | 2018-09-17 | 2018-09-17 | Magnetic antenna device for receiving underwater ultralow frequency signals |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114664071A (en) * | 2022-03-18 | 2022-06-24 | 青岛理工大学 | Underwater vehicle remote control system and method based on magnetic sensor |
| CN116260529A (en) * | 2023-03-10 | 2023-06-13 | 中国舰船研究设计中心 | Cross-seawater medium high-speed information transmission device |
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| JPH02121000A (en) * | 1988-10-28 | 1990-05-08 | Ishikawajima Harima Heavy Ind Co Ltd | Method for measuring physical characteristics of underwater rotary body |
| CN102854536A (en) * | 2012-09-27 | 2013-01-02 | 南京丹海电子科技有限公司 | Five-rod type side-length-adjustable type submarine cable detection antenna array and detection method thereof |
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| JPH02121000A (en) * | 1988-10-28 | 1990-05-08 | Ishikawajima Harima Heavy Ind Co Ltd | Method for measuring physical characteristics of underwater rotary body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114664071A (en) * | 2022-03-18 | 2022-06-24 | 青岛理工大学 | Underwater vehicle remote control system and method based on magnetic sensor |
| CN114664071B (en) * | 2022-03-18 | 2023-03-28 | 青岛理工大学 | Underwater vehicle remote control system and method based on magnetic sensor |
| CN116260529A (en) * | 2023-03-10 | 2023-06-13 | 中国舰船研究设计中心 | Cross-seawater medium high-speed information transmission device |
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| CN109244625B (en) | 2021-04-06 |
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