CN106712310A - Distributed wireless energy transmission method based on time reversal - Google Patents
Distributed wireless energy transmission method based on time reversal Download PDFInfo
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- CN106712310A CN106712310A CN201710142293.0A CN201710142293A CN106712310A CN 106712310 A CN106712310 A CN 106712310A CN 201710142293 A CN201710142293 A CN 201710142293A CN 106712310 A CN106712310 A CN 106712310A
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Abstract
The invention relates to the field of energy transmission through electromagnetic waves, and specifically discloses a remote distributed wireless energy transmission method in a closed winding environment based on electromagnetic time reversal. The method comprises the following steps that a generator at a receiving end generates an electromagnetic signal; a beacon antenna at the receiving end transmits the electromagnetic signal; the electromagnetic signal transmitted by the beacon antenna is efficiently transmitted through a metal wire array arranged in the winding environment; a distributed antenna array in the winding environment receives the electromagnetic signal transmitted by the metal wire array, and transmits the electromagnetic signal to a signal reversal device; the signal reversal device carries out the time reversal of the electromagnetic signal, and then transmits the electromagnetic signal to an amplifier for amplification; the distributed antenna array transmits the electromagnetic signal and enables the electromagnetic signal to be focused at the receiving end. According to the invention, the beacon antenna at the receiving end is used for transmitting the electromagnetic signal, and the metal wire array serves as a transmission carrier. The time reversal is used for achieving the high-efficiency transmission of energy in the closed winding environment.
Description
Technical field
The invention belongs to electromagnetic wave wireless energy transportation art, more specifically, it is related to a kind of anti-based on the electromagnetism time
Remote distributed wireless delivery of energy method in the tortuous environment of closing drilled.
Background technology
So-called delivery of energy, is that energy conveying is carried out to electrical equipment, and the supply lines of such as cable television is powered, electric toothbrush
Inductive charging etc..With society continue to develop and people for the promptness of energy demand, wireless power transfer start by
Propose.Wireless power transfer mode, generally comprises three kinds：Electromagnetic wave far-field energy is conveyed, and resonance coupling delivery of energy, electromagnetic induction coupling is defeated
Energy.
Resonance coupling delivery of energy refers to the device at two with same frequency, can realize nothing by the positive energy exchange that resonates
The conveying of heat input.The advantage of this method is that energy transimission power is high, has the disadvantage that the size of device is generally large, efficiency of transmission
It is relatively low, it is more difficult to reach the purpose of practice.
Electromagnetic induction coupling delivery of energy is the electric current that energy transmission, i.e. main coil are realized by the sensing between coil and coil
Can change over time the electromagnetic wave in space Deng change, so as to produce induced-current in secondary coil, realize that wireless energy is defeated
Send.The advantage of this method is efficiency of transmission higher, but transmits energy, general electromagnetic interference by the electromagnetic field for then passing through change
Than more serious.
The conveying of electromagnetic wave far-field energy is, with electromagnetic wave as carrier, electromagnetic wave to be launched by transmitting terminal, and receiving terminal is received
By a series of subsequent treatments after to electromagnetic wave, energy is transmitted in realization between emitter and reception device.This method
Advantage is without the redundant equipments such as cable auxiliary, save space.
In the last few years, also there is researcher to propose wire and be conducive to Electromagnetic Wave Propagation, but simply using preferable
Studied in communication space, in tortuous spaces environment how to improve delivery of energy effect for wire linear array and have no correlation and grind
Study carefully；Wire is simply randomly dispersed within communication space by existing research simultaneously mostly, not more efficient for wire
Or sufficiently increase delivery of energy effect is studied.
Time reversal is a kind of new Electromagnetic Wave Propagation and control method；Time reversal needs the closing in the source of encirclement bent
It is covered with electromagnetic wave signal receiver on face, the receiving device is referred to as TRM；TRM is carried out after receiving the electromagnetic wave signal that source is launched
Time reversal, then re-emit, the electromagnetic wave signal re-emissioned realizes spatiotemporal focusing again in the vicinity of emission source；
Radio magnetic wave conveying energy aspect, by using the space-time focus characteristics of time reversal, wireless power transfer has been achieved for larger
Progress, have developed a series of station column time reversal mirror system, compared to former, energy transfer efficiency is for this method
Through being enhanced, but have the disadvantage that antenna array ambient radiation is larger and is difficult to use in the place for more closing complications.
Wherein time reversal includes that distributed aerial array and time reversal module are (general to use signal reversing device reality
The inverting of existing signal), distributed aerial array is also referred to as antenna array, and it is (such as symmetrically placed by many identical individual antennas
Dipole antenna) antenna system that rearranges.The directional diagram of individual antenna is difficult to control, and gain is not high, and other parameters are often
Use requirement can not be met, so needing to use array antenna in some application scenarios (such as radar antenna etc.).Array day
The each group of line should have certain arrangement regulation and feeding classification into antenna element, to obtain required function.Arranged by unit
Linear array and face battle array can be divided into.The most frequently used linear array is the center equidistant arrangement line array in a straight line successively of each unit.Line
The each unit of battle array also has what Unequal distance was arranged, and each unit center can not also arrange in a straight line, for example, arrange circumferentially.
The radiation field of array antenna be constitute the antenna array unit radiation field summation (vector) due to unit each
The amplitude and phase of position and feed current can be adjusted, so as to realize efficient transmission.Distributed aerial array is used and divided
Cloth is placed, and is used in the tortuous environment of closing, individual antenna can be allowed to bear relatively low power power dispersion, realizes long distance
From conveying, while keeping wireless power transfer efficiency higher.
Existing automation control appliance is using quite varied, and many automation control appliances are in closing space, no
It is easily disassembled；It is so when device needs energy, then very inconvenient；When pass energy in the tortuous environment of closing simultaneously,
Due to the space limitation in tortuous environment and the electromagnetic transmission environment of complexity, cause efficiency of transmission low, this gives and is applied to envelope
The energy supply of the device closed in tortuous environment causes great inconvenience.So, work out a kind of distributed remote energy
The technology of transmission, the efficiency for improving the remote-wireless energy transmission in the tortuous environment of closing, with highly important meaning
Justice.
The content of the invention
It is an object of the invention to：For due to electromagnetic wave in tortuous environment space limitation and complexity electromagnetism ring
Transmitted in border and cause the problem of efficiency of transmission reduction, high efficiency of transmission can be also realized in curved structure the invention provides one kind
The distributed wireless energy transmission method based on time reversal.
The technical solution adopted by the present invention is as follows：
A kind of distributed wireless energy transmission method based on time reversal, comprises the following steps：
(1)：The generator of the receiving terminal in the tortuous environment of closing produces electromagnetic wave signal and passes to beacon antenna, beacon
Antenna receives the electromagnetic wave signal of generator transmission and passes to wire linear array, and the transmission of wire linear array receives beacon day
The electromagnetic wave signal of line transmission simultaneously passes to distributed aerial array；
(2)：The electromagnetic wave signal that distributed aerial array receives the transmission of wire linear array passes to signal inversion device again
Part, the electromagnetic wave signal that signal reversing device will be received carries out under operation as energy signal, obtains inverting electromagnetic wave signal,
Inverting electromagnetic wave signal is passed to amplifier by signal reversing device；Amplifier receives inverting electromagnetic wave signal and it is carried out
Enhanced processing, is amplified electromagnetic wave signal, and amplifier passes to distributed aerial array by electromagnetic wave signal is amplified, distributed
Amplification electromagnetic wave signal that antenna array receiver is transmitted to amplifier simultaneously passes to wire linear array；Wherein distributed aerial array
Effect with dispersion electromagnetic wave signal and transmission；
(3)：Wire linear array receives the electromagnetic wave signal of distributed aerial array transmission and is delivered to receiving terminal, and
Focusing is produced at receiving terminal, focused electromagnetic ripple signal is obtained.The electromagnetic wave signal of final distributed aerial array transmission is being received
End focuses on, and realizes passing energy.
After device at the beacon antenna of receiving terminal does not have energy, beacon antenna electromagnetic signals to residing complications
In environment, under the canalization effect of wire linear array, electromagnetic wave signal expeditiously reaches distributed aerial array, distributed day
After receiving electromagnetic wave signal at linear array, electromagnetic wave signal is inverted in time by signal reversing device, Ran Hou
In the presence of amplifier, it is exaggerated by the electromagnetic wave signal of reversion treatment, then is launched by distributed aerial array, then by gold
The effect of category silk thread battle array, electromagnetic wave signal is expeditiously focused at the beacon antenna up to receiving terminal, realizes wireless power transfer；Time
Inverting mirror (TRM) include distributed aerial array, signal reversing device and amplifier, the application by time reversal and
Increase wire linear array in space and realize high efficiency of transmission of the electromagnetic wave signal in tortuous spaces, it is wireless in tortuous spaces
Biography can be significant for existing automation control appliance etc..
Alternatively, distributed aerial array is omnidirectional antenna or directional aerial.Can be according to the specific of electromagnetic wave signal
Propagate to select；Directional aerial can allow electromagnetic wave signal emission port to be directed at wire linear array, more conducively propagate, relative to reduce
The loss of electromagnetic wave signal.
Preferably, distributed aerial array is distributed in the center of wire linear array.Central magnetic field is most strong, electromagnetic wave signal edge
The wire transmission of surrounding, can preferably realize the high efficiency of transmission of electromagnetic wave signal.
Preferably, wire linear array average length is the integral multiple of electromagnetic wave half-wavelength.When wire linear array average length
When being the integral multiple of electromagnetic wave half-wavelength, resonance effect becomes apparent from, canalization effect (electromagnetic wave is propagated along wire linear array) effect
Fruit is more preferably.
Specifically, signal reversing device is connected by wired transmission with amplifier, and distributed aerial array is by wired biography
Pass and be connected with signal reversing device and amplifier respectively.The signal of distributed aerial array transmitting is directly by transmission line to signal
Reversing device, directly amplifier is delivered to after the treatment of signal reversing device by transmission line by the electromagnetic wave signal after treatment again,
Electromagnetic wave signal is directly delivered to distributed aerial array by amplifier by transmission line again.Amplifier and signal reversing device
Position sets and does not require.
In sum, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. the present invention produces electromagnetic wave signal, the letter of receiving terminal using the generator for being located at receiving terminal in closing curved structure
Mark antenna emission detection electromagnetic wave signal, is transmitted by wire linear array, and electromagnetic wave signal is received by distributed aerial array, is believed
Number reversing device carries out time reversal operation to electromagnetic wave signal, and amplifier is amplified treatment to electromagnetic wave signal again, finally
Electromagnetic wave signal after being processed by distributed aerial array transmitting, electromagnetic wave signal is focused at the beacon antenna of receiving terminal, together
When in tortuous spaces, improved by wire linear array and time reversal electromagnetic wave signal transmission efficiency, realize electricity
High efficiency of transmission of the magnetostatic wave signal in curved structure.
2. distributed aerial array is omnidirectional antenna or directional aerial；According to delivery of energy needs, flexible Application.Spaced antenna
Array has the advantages that focusing is good, small, delivery of energy efficiency high is lost.
3. when tinsel array length degree is the integral multiple of electromagnetic wave half-wavelength, resonance can be reached, canalization (electromagnetic wave along
Wire linear array is propagated) it is better.
4. when distributed aerial array is distributed in the center of wire linear array, central magnetic field is most strong, the loss of electromagnetic wave
Relative to reduce, electromagnetic wave is transmitted along the wire of surrounding, can preferably realize the high efficiency of transmission of electromagnetic wave signal.
5. the signal of distributed aerial array transmitting is directly delivered to signal reversing device, signal inversion device by transmission line
The electromagnetic wave signal after treatment is directly delivered to by amplifier by transmission line again after part treatment, amplifier is straight by transmission line again
Connect and electromagnetic wave signal is delivered to distributed aerial array.Wire transmission relative loss factor is smaller, and transmission controllability is stronger.
Brief description of the drawings
Fig. 1 is the basic block diagram of the application；
Fig. 2 is the basic block diagram of the application not attached cavity；
The electromagnetic wave signal waveform that Fig. 3 launches for the beacon antenna of the application receiving terminal；
Fig. 4 distributed antenna array receiver electromagnetic wave signal and metal-loaded silk when being the application non-metal-loaded silk thread battle array
Distributed antenna array receiver electromagnetic wave signal envelope comparison diagram during linear array；
Electromagnetism when Fig. 5 is the non-metal-loaded silk thread battle array after the application under operation received by distributed aerial array
Electromagnetic wave signal envelope comparison diagram when ripple signal is with metal-loaded silk thread battle array received by distributed aerial array；
Fig. 6 for the application receiving terminal beacon antenna non-metal-loaded silk thread battle array with metal-loaded silk thread gust when receive
Focused electromagnetic ripple signal contrast figure；
Marked in figure：1- distributed aerial arrays；The spaced antennas of 1-1- first；The spaced antennas of 1-2- second；2- believes
Mark antenna；3- wire linear arrays；5- cavitys.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, can be with any
Mode is combined.
The present invention is elaborated with reference to Fig. 1 to Fig. 6.
In order that the purpose of the present invention, technical scheme are definitely, next with reference to drawings and Examples, the present invention is entered
Row is further described.Embodiments of the present invention include but is not limited to following examples.
The present embodiment uses distributed aerial array 1；The reception antenna quantity for setting distributed aerial array 1 includes two
It is individual, it is respectively the first spaced antenna 1-1, the second spaced antenna 1-2；Electromagnetic wave signal used be 4.9-5.1GHz, then in
It is 5Ghz that frequency of heart calculates average value；According to λ f=c (c is the light velocity), wavelength can be calculated for 6cm, a length of 3cm of half-wave, then
To a length of 3cm of centre frequency half-wave, the first spaced antenna 1-1 and the second spaced antenna 1-2 using same class dipole day
Line (is used for receiving and launching fixed frequency electromagnetic wave signal；It is in simultaneously pipeline model), pipeline model is included in 160cm*80*
In the cuboid of cm*60cm, the pipeline model cross section length of side is 60cm, and cavity inner wire linear array uses 8*7 arrays, average long
It is 96cm to spend, and is 32 double-lengths of centre frequency half-wavelength, and distributed aerial array 1 is believed at wire linear array center 26cm
At mark antenna 2 offline battle array about 26cm, beacon antenna and generator are provided with receiving terminal, generator is connected with beacon antenna；
Simultaneously signal reversing device and amplifier are additionally provided with tortuous spaces.First spaced antenna 1-1 and the second spaced antenna
1-2 is connected by transmission line with signal reversing device, and signal reversing device is connected by transmission line with amplifier, and amplifier passes through
Transmission line is connected with the second spaced antenna 1-2 and the second spaced antenna 1-1；Energy transfer process is comprised the following steps successively：
1：One channel detection electromagnetic wave signal is produced by the generator of receiving terminal, channel is visited by the beacon antenna of receiving terminal
Electromagnetic wave signal is surveyed to around launching, electromagnetic signals figure is as shown in Figure 3；
2：The electromagnetic wave signal of beacon antenna transmitting is transmitted by wire linear array, and distributed aerial array 1 receives biography
The electromagnetic wave signal passed, the first spaced antenna 1-1 (wherein the first spaced antenna 1-1 and the second spaced antenna 1-2
Signal graph it is identical because the two is in distribution) the electromagnetic wave signal figure that receives is as shown in Figure 4；First spaced antenna 1-1
The electromagnetic wave signal that will be received by transmission line again with the second spaced antenna 1-2 is delivered to signal reversing device；Signal is anti-
Turning electromagnetic wave signal of the device to receiving carries out time reversal operation；Electromagnetic wave signal after reversion treatment is as shown in Figure 5；Letter
Electromagnetic wave signal is passed to by amplifier by transmission line after the treatment of number reversing device；Amplifier is put to electromagnetic wave signal again
Greatly, the electromagnetic wave signal after being amplified, due to the linear character and convenient ratio to channel response of electromagnetic wave signal amplitude
Compared with efficiency, it is 1 to set multiplication factor, and the first spaced antenna 1-1 and the second spaced antenna 1-2 is simultaneously by the electromagnetism after amplification
Ripple signal is launched；
3：Electromagnetic wave signal after the amplification of the first spaced antenna 1-1 and the second spaced antenna 1-2 transmittings is in metal
Focusing is produced in the presence of silk thread battle array and at the beacon antenna of receiving terminal；Electromagnetic wave signal after focusing is as shown in Figure 6；
In Fig. 4-Fig. 6, what dotted line was represented is the corresponding electromagnetic wave signal envelope diagram of non-metal-loaded silk thread；And solid line
What is represented is the corresponding electromagnetic wave signal envelope diagram of metal-loaded silk thread, and wherein abscissa represents the time, with ns (nanosecond)
It is unit；Ordinate is the electromagnetic wave signal amplitude at correspondence moment, and electromagnetic wave signal amplitude is in units of V.
As seen from Figure 4 after metal-loaded silk thread battle array, electromagnetic wave signal amplitude is received more after distributed aerial array
It is high, it was demonstrated that wire linear array can improve transmission of the electromagnetic wave signal in distributed aerial array；
It is distributed during non-metal-loaded silk thread battle array after under operation as seen from Figure 5 after metal-loaded silk thread battle array
Electromagnetic wave signal amplitude received by aerial array is higher, it was demonstrated that it is anti-in the time that wire linear array can improve electromagnetic wave signal
The transmission drilled；
As seen from Figure 6 after metal-loaded silk thread battle array, the electromagnetic wave signal width that the beacon antenna of receiving terminal is received
Degree is stronger, it was demonstrated that wire linear array can improve the transmission of electromagnetic wave signal；After addition metallic wire array, occur at former beacon antenna
Stronger focused electromagnetic ripple signal, the amplitude increase about 30% of focused electromagnetic ripple signal.
This programme sets distributed wireless power transfer array antenna by curved structure is closed, and in curved structure
Setting meets the wire array of certain condition, after the beacon antenna at impact point transmits channel detection electromagnetic wave signal,
Corresponding electromagnetic wave signal is received at distributed aerial array, the electromagnetic wave signal that signal reversing device will be received is by inverting
Operation, amplifier enters line amplitude amplification to electromagnetic wave signal again, obtains inverting electromagnetic wave signal and again by spaced antenna battle array
Row transmitting, using channel reverse property and during auto-correlation convolution, occur focused electromagnetic ripple signal at impact point, it is real
The remote distributed wireless delivery of energy in the tortuous environment of efficient closing is showed.
The application is not limited to above-described embodiment, and the reception antenna quantity in distributive array is more not limited to two, can root
Factually border space requirement sets；Any direct replacement can directly use or the side in the application is used in the case of not taking work
Case, all should fall into the protection domain of the application.
Claims (5)
1. a kind of distributed wireless energy transmission method based on time reversal, it is characterised in that comprise the following steps：
(1)：The generator of the receiving terminal in the tortuous environment of closing produces electromagnetic wave signal and passes to beacon antenna, beacon day
Line receives the electromagnetic wave signal of generator transmission and passes to wire linear array, and wire linear array receives beacon antenna transmission
Electromagnetic wave signal and pass to distributed aerial array；
(2)：The electromagnetic wave signal that distributed aerial array receives the transmission of wire linear array passes to signal reversing device again, believes
The electromagnetic wave signal that number reversing device will be received carries out under operation as energy signal, obtains inverting electromagnetic wave signal, signal
Inverting electromagnetic wave signal is passed to amplifier by reversing device；Amplifier receives inverting electromagnetic wave signal and it is amplified
Treatment, is amplified electromagnetic wave signal, and amplifier passes to distributed aerial array, spaced antenna by electromagnetic wave signal is amplified
Amplification electromagnetic wave signal that array received is transmitted to amplifier simultaneously passes to wire linear array；
(3)：Wire linear array receives the electromagnetic wave signal of spaced antenna transmission and is delivered to and focusing is produced at receiving terminal, obtains
To focused electromagnetic ripple signal.
2. a kind of distributed wireless energy transmission method based on time reversal according to claim 1, it is characterised in that
Distributed aerial array is omnidirectional antenna or directional aerial.
3., according to a kind of any described distributed wireless energy transmission method based on time reversal of claim 1 or 2, it is special
Levy and be, distributed aerial array is distributed in the center of wire linear array.
4. a kind of distributed wireless energy transmission method based on time reversal according to claim 1, it is characterised in that
Wire linear array average length is the integral multiple of electromagnetic wave half-wavelength.
5. a kind of distributed wireless energy transmission method based on time reversal according to claim 1, it is characterised in that
Signal reversing device is connected by transmission line with amplifier, distributed aerial array by transmission line respectively with signal reversing device
Connected with amplifier.
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| CN108879894A (en) * | 2018-06-07 | 2018-11-23 | 深圳市宇能无线技术有限公司 | A kind of multiobjective selection wireless power transfer method and device based on focus wave |
| CN110120711A (en) * | 2019-04-17 | 2019-08-13 | 电子科技大学 | Autonomous dynamic radio electric energy reception device and method based on time reversal |
| CN111030324A (en) * | 2019-12-09 | 2020-04-17 | 南京航空航天大学 | Multi-target mobile equipment tracking wireless energy transmission method and system |
| CN111674430A (en) * | 2020-07-16 | 2020-09-18 | 何秀华 | Micro-rail vehicle distance measuring device and method |
| CN114841179A (en) * | 2022-05-31 | 2022-08-02 | 电子科技大学 | Sensing system based on RFID and time reversal electromagnetism |
| CN115208081A (en) * | 2022-09-15 | 2022-10-18 | 西南交通大学 | Wireless energy transmission method based on time reversal equal-space angle large-aperture array |
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| CN108879894A (en) * | 2018-06-07 | 2018-11-23 | 深圳市宇能无线技术有限公司 | A kind of multiobjective selection wireless power transfer method and device based on focus wave |
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| CN111030324A (en) * | 2019-12-09 | 2020-04-17 | 南京航空航天大学 | Multi-target mobile equipment tracking wireless energy transmission method and system |
| CN111030324B (en) * | 2019-12-09 | 2021-05-28 | 南京航空航天大学 | Multi-target mobile equipment tracking wireless energy transmission method and system |
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| CN114841179A (en) * | 2022-05-31 | 2022-08-02 | 电子科技大学 | Sensing system based on RFID and time reversal electromagnetism |
| CN115208081A (en) * | 2022-09-15 | 2022-10-18 | 西南交通大学 | Wireless energy transmission method based on time reversal equal-space angle large-aperture array |
| CN115208081B (en) * | 2022-09-15 | 2022-11-22 | 西南交通大学 | Wireless energy transmission method based on time reversal equal-space angle large-aperture array |
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