CN109193969A - A kind of microwave power transmission system and emulation mode suitable for mobile target - Google Patents
A kind of microwave power transmission system and emulation mode suitable for mobile target Download PDFInfo
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- CN109193969A CN109193969A CN201810791190.1A CN201810791190A CN109193969A CN 109193969 A CN109193969 A CN 109193969A CN 201810791190 A CN201810791190 A CN 201810791190A CN 109193969 A CN109193969 A CN 109193969A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses a kind of microwave power transmission systems and emulation mode suitable for mobile target, for realizing non-gaussian distribution transmitted waveform -- flat wave beam, the transmitting bore level as microwave wireless energy output system.To achieve the goals above, the microwave power transmission system uses transmitting module and receiving module including spaced antenna battle array, realizes the multi-multipoint microwave wireless delivery of energy of multifrequency, high-power without limitations, application is more flexible.The microwave power transmission system is using the flat wave beam of non-gaussian distribution waveform as transmitting bore level, the power density that can be evenly distributed on receiving front, the power capacity of rectifier diode is the same, and RECTIFYING ANTENNA can reduce design difficulty with uniform design；Meanwhile the transfer efficiency of RECTIFYING ANTENNA can be improved in equally distributed power density, and then promotes the efficiency of whole system；Focusing center's point is caused to deviate and burn RECTIFYING ANTENNA because target is mobile in addition, the design can also solve the problems, such as traditional Gauss distribution waveform.
Description
Technical field
The present invention relates to and microwave transmission field, more particularly, to a kind of microwave power transmission system suitable for mobile target
System and emulation mode.
Background technique
Currently, microwave wireless energy output system is mainly made of transmitting, spatial, reception rectification three parts, such as Fig. 1 institute
Show.DC energy is converted microwave energy by transmitting terminal microwave power generator, is then emitted microwave energy using antenna, passes through
Microwave energy is received and is rectified by free space transmission, receiving end RECTIFYING ANTENNA, is converted into DC energy.
The prior art needs to be specifically designed the bore level form of transmitting antenna and receiving rectification antenna, transmitting antenna bore
Field level distribution needs to be designed to Gaussian Profile form, and center transmission power is high, and periphery transmission power is low, and watt level meets height
This distribution, generally realizes the distribution using phased array antenna, at high cost；Receiving rectification antenna also wants corresponding and is designed to height
This distribution form, center antenna low gain high density, outer antennas high-gain low-density, design difficulty are larger.
The power capacity of rectifier diode can only be set according to the calculated results of power density in existing RECTIFYING ANTENNA
Meter, when practical application, can because calculated result and actual power density it is inconsistent, lead to the drop of RECTIFYING ANTENNA transfer efficiency
It is low.
The transmitted waveform of the prior art and receiving rectification antenna are designed according to Gaussian Profile, and static target is suitable for
Microwave wireless delivery of energy, the offset because of centre focus point is easy to when applying in mobile target, causes periphery high-gain low
The rectification unit power density of density is excessively high, burns rectification circuit, threatens system safety in utilization, therefore is not suitable for mobile mesh
Target microwave wireless delivery of energy.
The prior art using single-frequency single-point to single-point or single-frequency multiple spot to the microwave wireless delivery of energy emission system of single-point because
Frequency is identical, it is therefore desirable to which homologous design, microwave source is limited to when high-power applications, is unable to distributed group battle array, and focus with frequency
Algorithm is complex, can not accurately realize that Gaussian Profile designs.
Summary of the invention
The present invention is to overcome defect described in the above-mentioned prior art, while adapting to mobile target application demand, is guaranteed
Higher capture rate and RECTIFYING ANTENNA transfer efficiency provide a kind of microwave power transmission system suitable for mobile target and emulation side
Method.
In order to solve the above technical problems, technical scheme is as follows:
A kind of microwave power transmission system suitable for mobile target, comprising: transmitting module, receiving module and control module；
The transmitting module includes driving source, power amplifier and transmitting antenna, and driving source generates microwave signal and sends
To power amplifier, the microwave signal is amplified and passes through antenna by power amplifier is sent to receiving module；
The group battle array mode of the transmitting module is the setting of multifrequency multizone, and transmitting antenna is homologous relevant in region, interregional
Different frequencies are irrelevant, form the focus point of multiple and different frequencies on receiving front by self-focusing control algolithm, so that receiving
It is relatively uniform that power density is received in the entire plane of front, realizes flat wave beam；
The receiving module includes RECTIFYING ANTENNA, load and parameter detection module, and RECTIFYING ANTENNA is equally distributed front,
The flat wave beam of adaptation and transceiver system, and the microwave signal is converted to direct current signal, the direct current signal is passed
Transport to load；
The parameter detection module connect with RECTIFYING ANTENNA, for detecting the working condition and bearing power of RECTIFYING ANTENNA
Parameter is simultaneously sent to control module, and control module carries out the switch and power adjustment of transmitting module according to the parameter received；
The transmitting module and receiving module are wirelessly connected, control module respectively with transmitting module and receiving module into
The connection of row signal.
Preferably, the transmitting antenna and RECTIFYING ANTENNA are the antenna array being made of several antennas, for realizing into
The multi-multipoint microwave energy polymerization methods of row multifrequency.
Preferably, the parameter detection module includes communication module, processor and microwave remote sensor, for collecting rectification day
The state and parameter information of line are simultaneously sent to control module.
Preferably, the control module includes communication module and processor, by communication module respectively with parameter detecting mould
Block carries out signal with driving source and connects, and analyzes the state of RECTIFYING ANTENNA and adjusts the corresponding output power of driving source and switch.
Preferably, the transmitting antenna is the hexagon day being made of 1 central radiator and 6 edge-emission antennas
Linear array.
A kind of emulation mode of the microwave power transmission system suitable for mobile target, comprising the following steps:
S1. calculated using Matlab software, obtain the antenna array information of transmitting module A and receiving module B, calculate and
Drawing three-dimensional normalized power density map, by finding variable adjustment rule, the power density distribution optimized, it is desirable that energy
Power density fluctuation is less than 3dB on amount polymerization significant surface, and beam rolloff coefficient levels off to 1, obtains performance number P point；
S2. working frequency f, transmitting-receiving spacing L, antenna aperture D and antenna spacing d are obtained, 7 transmitting antennas and 7 are connect
It receives antenna to be indicated on three-dimensional coordinate, obtains A1, A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7, wherein in
For heart launch point A7 as origin, Φ is the angle relative to bore normal；
S3. the three-dimensional coordinate for passing through step S1, obtainsWithPhasor coordinate, obtain following vector cosine first
Function:
Also obtain:
S4. by the step S2'sFormula 2 is substituted into, is obtained:
Wherein,Angle for transmitting antenna A1 relative to the bore normal of receiving module B；
S5. willSubstitute into normalization field strength function:
Wherein,The normalization field strength size E for being transmitting antenna A1 at P pointA1p(φA1)；D is transmitting antenna bore
Diameter, unit m；λ is wavelength, unit m；Φ is the angle relative to bore normal；J1 is first-order bessel function；
S6. A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7 are carried out in P point according to the step S2-S5
The normalization field strength size at place calculates and substitutes into following formula:
Wherein, SpFor the power density values at P point, EiMAX(φi) it is transmitting antenna field strength maximum point on the receiving surface
Value；
S7. using Matlab to the S of the step S6pValue carries out emulation solution, carries out 3-D graphic using drawing tool
Describe, obtains the power density distribution waveform diagram of flat wave beam.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention program is pursued using the multi-multipoint energy converging mode of multifrequency realizes that beam rolloff coefficient levels off to 1
Flat wave beam can reach following effect:
Guarantee higher capture rate and RECTIFYING ANTENNA transfer efficiency, the available wave in 3dB fluctuation range simultaneously
Beam energy accounts for the wave beam of gross energy 80%, it is meant that can obtain high capture rate and high transfer efficiency simultaneously；
Mobile target application demand is adapted to exist when Gaussian Profile mode is applied to mobile target since centre focus is inclined
It the drawbacks of shifting causes the RECTIFYING ANTENNA local unit power of non-uniform Distribution form excessively high and instantaneously burns, is only applicable to static
The wireless power transfer of target；Flat beam designing only can lose portion of energy when center shifts, but not burn rectification day
Line is suitble to mobile target application；In addition, being uniformly distributed the RECTIFYING ANTENNA of design special-shaped can design, it is easier to realize and mobile
Target it is conformal；
Emission system can structure the formation in a distributed manner, and each region submatrix designs for different frequencies, can be spaced a distance distribution
Formula is laid, and according to the demand of mobile target selectively group battle array, is realized the common delivery of energy to mobile target or is connected delivery of energy, application
It is more flexible.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the microwave power transmission system schematic suitable for mobile target.
Fig. 2 is transmission antenna group battle array algorithm computation model schematic diagram.
Fig. 3 is the first analogous diagram of the flat wave beam that the multi-multipoint energy converging mode of multifrequency obtains.
Fig. 4 is the second analogous diagram of the flat wave beam that the multi-multipoint energy converging mode of multifrequency obtains.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
A kind of microwave power transmission system suitable for mobile target, as shown in Figure 1, comprising: transmitting module, receiving module and control
Molding block；
The transmitting module includes driving source, power amplifier and transmitting antenna, and driving source generates microwave signal and sends
To power amplifier, the microwave signal is amplified and passes through antenna by power amplifier is sent to receiving module；
The group battle array mode of the transmitting module is the setting of multifrequency multizone, and transmitting antenna is homologous relevant in region, interregional
Different frequencies are irrelevant, form the focus point of multiple and different frequencies on receiving front by self-focusing control algolithm, so that receiving
It is relatively uniform that power density is received in the entire plane of front, realizes flat wave beam；
The receiving module includes RECTIFYING ANTENNA, load and parameter detection module, and RECTIFYING ANTENNA is equally distributed front,
The flat wave beam of adaptation and transceiver system, and the microwave signal is converted to direct current signal, the direct current signal is passed
Transport to load；
The parameter detection module connect with RECTIFYING ANTENNA, for detecting the working condition and bearing power of RECTIFYING ANTENNA
Parameter is simultaneously sent to control module, and control module carries out the switch and power adjustment of transmitting module according to the parameter received；
The transmitting module and receiving module are wirelessly connected, control module respectively with transmitting module and receiving module into
The connection of row signal.
In the present embodiment, in order to reduce antenna size, facilitate a group battle array, the signal frequency that driving source generates is preferably X wave
Section, centre frequency 11.2GHz, each frequency source frequency interval 100MHz；Wherein, frequency source interval 100MHz is that adaptation multifrequency is more
The preferred embodiment of the filter bandwidht for the focus point being arranged on point receiving plane.It is realized and is considered based on symmetry and system, will emitted
Aerial array is determined as the hexagon battle array of 7 transmitting units composition.Each antenna element uses the circular polarisation parabolic of 0.4m bore
Surface antenna, about 5 ° of antenna half-power field angle, gain G t=30dBi, radiation efficiency > 50%.
According to far field formula:
L=2D2/λ
Wherein D is antenna aperture, and λ is wavelength, obtains the nearest far field of antenna of 0.4m bore, 11.2GHz working frequency
Distance is 12m.
After 7 transmission antenna group battle arrays, the power density on receiving plane can be calculated:
Wherein Pt is transmission power, and Gt is transmitter antenna gain (dBi), and L is dual-mode antenna spacing.Determine that antenna transmission power is
20W, the power density that can be calculated receiving rectification antenna face at this time is 7.7mW/cm2.
After calculating the basic parameter for determining emission system, modeling and simulation has been carried out to emission system group battle array algorithm.This
Algorithm calculates the field strength size of arbitrary point on receiving plane using Nen Method of Using Vector-matrix, is calculated using Matlab software and drawing three-dimensional is returned
One changes power density diagram, by finding variable adjustment rule, the power density distribution optimized, it is desirable that energy converging is effective
Power density fluctuation is less than 3dB on face, and beam rolloff coefficient levels off to 1.Variable parameter is working frequency f, receives in computation model
Spacing L, antenna aperture D, antenna spacing d are sent out, 7 launch points and 7 receiving points are indicated into each point respectively on three-dimensional coordinate and are sat
Mark, Φ are the angle relative to bore normal.Transmission antenna group battle array algorithm computation model is as shown in Figure 2.
Obtain following vector cosine function:
Wherein,Phasor coordinate be (- Xo-d/2,- L),Phasor coordinate is (0,0 ,-L), is obtained
It arrives:
Above-mentioned value is substituted into above-mentioned formula 2, is obtained:
By φA1Value substitutes into normalization field strength function:
Wherein: D---- transmitting antenna bore diameter, unit m；
λ ----wavelength, unit m；
The Φ ----angle relative to bore normal；
J1---- first-order bessel function；
Obtain normalization field strength size E of the transmitting antenna A1 at P pointA1p(φA1), and so on, it is every to calculate A2~A7
Normalization field strength size of a transmitting antenna at P point.Because of each transmitting antenna different frequency, the general power at P point is each hair
The power summation of antenna, therefore the power density values Sp at the available point are penetrated, which is frequency, reception and transmission range, antenna opening
The equation of diameter, antenna spacing.
Wherein EiMAX(φi) be some transmitting antenna field strength maximum point on the receiving surface value.
Power density formula 4 is subjected to emulation solution with Matlab, while carrying out 3-D graphic description using tool, it can be with
Obtain the power density distribution waveform of flat wave beam as shown in Figure 3 and Figure 4；Parameters can be determined to wave beam by emulation
The influence of shape, and provide and receive the dimension reference that front needs, on the basis of the basic parameter of above-mentioned emission system, more
Further refine and design the scheme of antenna array.
In the present embodiment, transmitting antenna is the parabola antenna battle array being made of several antennas, realizes multifrequency multiple spot pair
The microwave transmission of multiple spot；Transmitting antenna array is determined as the hexagon battle array of 7 transmitting units composition.In a kind of embodiment party of change
In formula, transmitting antenna can use phased array antenna battle array, achieve the effect that similar with parabola antenna battle array, can also realize flat wave
The transmission of beam.
In the present embodiment, parameter detection module includes communication module, processor and microwave remote sensor.Parameter detection module
Using the working condition of microwave remote sensor detection RECTIFYING ANTENNA and the data of microwave parameters, it is collected by processor and arranges and lead to
It crosses wired or wireless module and is sent to control module.
In the present embodiment, control module includes communication module and processor.Control module may be provided in transmitting module or connect
Any end for receiving module, when being attached with the other end, is used in local corresponding driving source or parameter detection module
Corresponding be wirelessly connected carries out data transmission.Control module receives the work shape of the RECTIFYING ANTENNA of parameter detection module transmission first
State and microwave parameters are analyzed and are judged according to above-mentioned data, to carry out the switch of driving source and the adaptability tune of power
It is whole.
A kind of emulation mode of the microwave power transmission system suitable for mobile target, comprising the following steps:
S1. calculated using Matlab software, obtain the antenna array information of transmitting module A and receiving module B, calculate and
Drawing three-dimensional normalized power density map, by finding variable adjustment rule, the power density distribution optimized, it is desirable that energy
Power density fluctuation is less than 3dB on amount polymerization significant surface, and beam rolloff coefficient levels off to 1, obtains performance number P point；
S2. working frequency f, transmitting-receiving spacing L, antenna aperture D and antenna spacing d are obtained, 7 transmitting antennas and 7 are connect
It receives antenna to be indicated on three-dimensional coordinate, obtains A1, A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7, wherein in
For heart launch point A7 as origin, Φ is the angle relative to bore normal；
S3. the three-dimensional coordinate for passing through step S1, obtainsWithPhasor coordinate, obtain following vector cosine first
Function:
Also obtain:
S4. by the step S2'sFormula 2 is substituted into, is obtained:
Wherein,Angle for transmitting antenna A1 relative to the bore normal of receiving module B；
S5. willSubstitute into normalization field strength function:
Wherein,The normalization field strength size E for being transmitting antenna A1 at P pointA1p(φA1)；D is transmitting antenna bore
Diameter, unit m；λ is wavelength, unit m；Φ is the angle relative to bore normal；J1 is first-order bessel function；
S6. A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7 are carried out in P point according to the step S2-S5
The normalization field strength size at place calculates and substitutes into following formula:
Wherein, SpFor the power density values at P point, EiMAX(φi) it is transmitting antenna field strength maximum point on the receiving surface
Value；
S7. using Matlab to the S of the step S6pValue carries out emulation solution, carries out 3-D graphic using drawing tool
Describe, obtains the power density distribution waveform diagram of flat wave beam.
The region submatrix quantity, frequency selection, power amplifier power, antenna size and the group formation formula that use in the present invention etc. are specific
Parameter values and implementation are to illustrate embodiment and use, and are not defined to teachings herein.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (6)
1. a kind of microwave power transmission system suitable for mobile target characterized by comprising transmitting module, receiving module and control
Molding block；
The transmitting module includes driving source, power amplifier and transmitting antenna, and driving source generates microwave signal and is sent to function
Rate amplifier, the microwave signal is amplified and passes through antenna by power amplifier is sent to receiving module；
The group battle array mode of the transmitting module is the setting of multifrequency multizone, and transmitting antenna is homologous relevant in region, interregional difference
Frequently irrelevant, the focus point of multiple and different frequencies is formed on receiving front by self-focusing control algolithm, realizes flat wave beam；
The receiving module includes RECTIFYING ANTENNA, load and parameter detection module, and RECTIFYING ANTENNA is equally distributed front, adaptation
With the flat wave beam of transceiver system, and the microwave signal is converted to direct current signal, the direct current signal is transmitted to
Load；
The parameter detection module is connect with RECTIFYING ANTENNA, for detecting the working condition of RECTIFYING ANTENNA and the parameter of bearing power
And it is sent to control module, control module carries out the switch and power adjustment of transmitting module according to the parameter received；
The transmitting module and receiving module are wirelessly connected, and control module carries out letter with transmitting module and receiving module respectively
Number connection.
2. the microwave power transmission system according to claim 1 for being suitable for mobile target, which is characterized in that the transmitting antenna
It is the antenna array being made of several antennas with RECTIFYING ANTENNA.
3. the microwave power transmission system according to claim 1 for being suitable for mobile target, which is characterized in that the parameter detecting
Module includes communication module, processor and microwave remote sensor.
4. the microwave power transmission system according to claim 1 for being suitable for mobile target, which is characterized in that the control module
Including communication module and processor.
5. the microwave power transmission system according to claim 2 for being suitable for mobile target, which is characterized in that the transmitting antenna
For the hexagonal antenna battle array being made of 1 central radiator and 6 edge-emission antennas.
6. a kind of emulation mode of the microwave power transmission system suitable for mobile target, which comprises the following steps:
S1. it is calculated using Matlab software, obtains the antenna array information of transmitting module A and receiving module B, calculated and draw
Three-dimensional normalized power density map, by finding variable adjustment rule, the power density distribution optimized, it is desirable that energy is poly-
It closes power density fluctuation on significant surface and is less than 3dB, beam rolloff coefficient levels off to 1, obtains performance number P point；
S2. working frequency f, transmitting-receiving spacing L, antenna aperture D and antenna spacing d are obtained, by 7 transmitting antennas and 7 reception days
Line is indicated on three-dimensional coordinate, obtains A1, A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7, wherein center hair
For exit point A7 as origin, Φ is the angle relative to bore normal；
S3. the three-dimensional coordinate for passing through step S1, obtainsWithPhasor coordinate, obtain following vector cosine function first:
Also obtain:
S4. by the step S2'sFormula 2 is substituted into, is obtained:
Wherein,Angle for transmitting antenna A1 relative to the bore normal of receiving module B；
S5. willSubstitute into normalization field strength function:
Wherein,The normalization field strength size E for being transmitting antenna A1 at P pointA1p(φA1)；D is transmitting antenna bore diameter,
Its unit is m；λ is wavelength, unit m；Φ is the angle relative to bore normal；J1 is first-order bessel function；
S6. A2, A3, A4, A5, A6, A7, B1, B2, B3, B4, B5, B6 and B7 are carried out at P point according to the step S2-S5
Normalization field strength size calculates and substitutes into following formula:
Wherein, SpFor the power density values at P point, EiMAX(φi) be transmitting antenna field strength maximum point on the receiving surface value；
S7. using Matlab to the S of the step S6pValue carries out emulation solution, carries out 3-D graphic description using drawing tool,
Obtain the power density distribution waveform diagram of flat wave beam.
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