CN110109223A - A kind of laser radio energy transmission system based on light guide plate - Google Patents
A kind of laser radio energy transmission system based on light guide plate Download PDFInfo
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- CN110109223A CN110109223A CN201910399053.8A CN201910399053A CN110109223A CN 110109223 A CN110109223 A CN 110109223A CN 201910399053 A CN201910399053 A CN 201910399053A CN 110109223 A CN110109223 A CN 110109223A
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- 239000000463 material Substances 0.000 claims description 9
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
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- 238000007493 shaping process Methods 0.000 abstract description 5
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- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 239000000969 carrier Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
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- 229920005591 polysilicon Polymers 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
-
- 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
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of laser radio energy transmission system based on light guide plate, it includes laser emitter, light guide plate and photovoltaic receiver, to photovoltaic receiver, the bottom surface of the light guide plate is provided with for incident laser heterogeneous to be changed into the uniform outer micro structure array for penetrating laser the laser guide that the light guide plate is used to issue laser emitter.The present invention passes through the scattering direction of light-guide plate guides laser, change the direction of propagation of light, improve the uniformity of the irradiation laser on photovoltaic receiver, reduce series-parallel photovoltaic receiver as receive the different laser of power and caused by mismatch loss, improve the output power and efficiency of the laser radio energy transmission system based on light guide plate.Laser is converted into area source by dotted laser in light guide plate transmission process simultaneously, laser irradiation is received convenient for classic flat-plate type photovoltaic receiver, so that laser is easy to be full of entire receiving panel, further save beam shaping device, the energy loss for reducing device, has saved the cost of system.
Description
Technical field
The present invention relates to wireless energy transfer field more particularly to a kind of laser radio energy transmission systems based on light guide plate
System.
Background technique
Wireless energy transfer is a kind of contactless energy transmission mode, and energy is transferred to load from energy source and does not need to lead to
Traditional transmission line is crossed to realize, since being born from the technology, just as its own is convenient and safe, and can satisfy it is certain special
The demand powered under environment and be concerned by all parties, have broad application prospects and high practical value.
Wireless energy transmission technology is usually the transmission that electric energy is realized by air or other media, wherein by recognizing
There are two kinds of carriers of application prospect to have microwave and laser to be opposite.Laser has monochromaticjty, good directionality, energy collection medium excellent
Point, even if the laser radio energy transmission system based on light guide plate is also able to achieve at a distance under the conditions of smaller transmission power
Electric energy transmits, and the volume and quality of transmitting and receiving apparatus required for simultaneity factor only need the 1/10 of similar microwave equipment,
Therefore more promising.
But laser is that the light intensity of presentation central part is stronger, and the weaker light distribution of the light intensity of marginal portion is that is, so-called
Gaussian Profile, for remote-wireless energy transmission, this heterogeneity of laser energy is very beneficial for energy in sky
It is propagated in gas or medium, the energy loss in transmission process can be reduced.It is non-equal but when receiving end carries out photoelectric conversion
The efficiency that even light irradiates lower photovoltaic receiver will be significantly less than homogeneous light irradiation, therefore laser radio energy system to be enable to obtain
A large amount of application very well, it is crucial for solving receiving end laser uniformity problem.
Therefore, the prior art needs to improve.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of laser radio energy based on light guide plate
Measure Transmission system, it is intended to solve the heterogeneity due to laser emission and lead to the laser radio energy transmission system based on light guide plate
The lower problem of the output power and efficiency of system.
Technical scheme is as follows:
A kind of laser radio energy transmission system based on light guide plate, wherein connect including laser emitter, light guide plate and photovoltaic
Device is received, to photovoltaic receiver, the bottom surface of the light guide plate is set the laser guide that the light guide plate is used to issue laser emitter
It is equipped with for incident laser heterogeneous to be changed into the uniform outer micro structure array for penetrating laser.
The laser radio energy transmission system based on light guide plate, wherein the micro structure array is to arrange in array
The light guiding points of cloth form.
The laser radio energy transmission system based on light guide plate, wherein the micro structure array is that size is identical
And the identical light guiding points composition of density degree.
The laser radio energy transmission system based on light guide plate, wherein the micro structure array is of different sizes
And the light guiding points composition that density degree is different.
The laser radio energy transmission system based on light guide plate, wherein the light guiding points are hemisphere jut, cylindricality
One of protrusion, regular polygon protrusion or irregular polygon protrusion.
The laser radio energy transmission system based on light guide plate, wherein the light guide plate is rectangular slab comprising
Four sides, bottom surface and top surface, one of side be laser entrance face, the top surface be laser outgoing plane, described other three
A side and bottom surface are provided with reflecting plate.
The laser radio energy transmission system based on light guide plate, wherein the light guide panel material is vitreous silica.
The laser radio energy transmission system based on light guide plate, wherein the laser emitter front end is also set up
There is the beam expanding lens for adjusting laser spot size size；The laser emitter, beam expanding lens and light guide plate are located at same water
Plane, the photovoltaic receiver are located at the surface of light guide plate.
The laser radio energy transmission system based on light guide plate, wherein when the laser emitter is 808nm wave
Long semiconductor laser, the photovoltaic receiver are made of GaAs photovoltaic cells.
The laser radio energy transmission system based on light guide plate, wherein when the laser emitter is that wavelength is big
When the diode pumping solid laser of 1000nm, the photovoltaic receiver is made of InGaAs photovoltaic cells.
The utility model has the advantages that the laser radio energy transmission system proposed by the present invention based on light guide plate is using light guide plate as solution
The certainly key technology of receiving end light uniformity problem is changed the direction of propagation of light, is mentioned by the scattering direction of light-guide plate guides laser
The uniformity of irradiation laser on high photovoltaic receiver reduces series-parallel photovoltaic receiver due to receiving the different laser of power
Mismatch loss caused by and improves the output power and efficiency of the laser radio energy transmission system based on light guide plate.Swash simultaneously
Light is converted into area source by dotted laser in light guide plate transmission process, receives convenient for classic flat-plate type photovoltaic receiver
Laser irradiation further saves beam shaping device, reduces the energy of device so that laser is easy to be full of entire receiving panel
Amount loss, has saved the cost of system.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the laser radio energy transmission system preferred embodiment based on light guide plate of the present invention
Figure.
Specific embodiment
The present invention provides a kind of laser radio energy transmission system based on light guide plate, to make the purpose of the present invention, technology
Scheme and effect are clearer, clear, and the present invention is described in more detail below.It should be appreciated that described herein specific
Embodiment is only used to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of laser radio energy transmission system based on light guide plate, as shown in Figure 1, the base
In the laser radio energy transmission system of light guide plate include laser emitter 10, light guide plate 20 and photovoltaic receiver 30, it is described
For the laser guide that light guide plate 20 is used to issue laser emitter to photovoltaic receiver, the bottom surface setting of the light guide plate 20 is useful
In incident laser heterogeneous is changed into the uniform outer micro structure array 21 for penetrating laser.
In the present embodiment, the micro structure array that bottom surface of light guide plate is arranged in can will inject into the laser in light guide plate
Diffusing reflection state is changed by total reflection state, i.e., the described micro structure array can change the direction of propagation of laser, the laser
In the purpose that uniform can be achieved after reflection, refraction and scattering, to improve the irradiation laser on photovoltaic receiver
Uniformity, reduce series-parallel photovoltaic receiver as receive the different laser of power and caused by mismatch loss, raising is based on
The output power and efficiency of the laser radio energy transmission system of light guide plate.Laser is in light guide plate transmission process by dotted simultaneously
Laser be converted into area source, laser irradiation is received convenient for classic flat-plate type photovoltaic receiver, so that laser is easy to be full of
Entire receiving panel, further saves beam shaping device, reduces the energy loss of device, has saved the cost of system.
In some embodiments, the light guide plate is prepared using optical-grade transparent material, the micro-structure battle array
It is classified as the light guiding points composition being arranged in array, the light guiding points are using chemical etching, precision machinery engraving, mold injection moulding
The methods of be prepared in bottom surface of light guide plate.The present embodiment utilizes dissipating for light by making light guiding points in the bottom surface of light guide plate
Principle is penetrated, when in laser irradiation to light guiding points, a light can be scattering into a plurality of light, a part of these scattering lights
Light guide plate can be projected, another part then will continue to reflect, until encountering next light guiding points, repeat scattering process；Therefore, pass through
The light guiding points that are arranged in array of bottom surface of light guide plate setting can effectively improve the laser projected from light guide plate uniformity (90% with
On), it is defeated that this can effectively solve the photovoltaic receiver as caused by the inhomogeneities of laser in laser radio energy transport
The problem of current limited is in minimum photogenerated current out, and photovoltaic receiver output voltage is limited to minimum photovoltage, so as to mention
The delivery efficiency and output power of laser radio energy transmission system of the height based on light guide plate.In the present embodiment, the leaded light
Plate is by the bootable laser uniform irradiation to entire photovoltaic receiver of light guiding points that its bottom surface is arranged, to more efficiently control
The distribution of light and more efficiently using laser improve photoelectric efficiency.
In some embodiments, since laser has very high temperature, when the materials such as use PMMA are as guide-lighting plate
When material, light guide plate is easy to damage in laser transmission process, so the present embodiment is using vitreous silica resistant to high temperature as light guide plate
The characteristics of material, its heat resistance is very high, meets laser transmission well.In some embodiments, the light guide plate
Laser entrance face and positive output face are coated with 808nm or 1000nm anti-reflection film, for improving coupling efficiency and the output of laser
Effect.
In some embodiments, the light guide plate can be made with monolith, can also be fabricated separately and be arbitrarily spliced into whole
Body, it is simple process, simple for production.In some embodiments, the micro structure array is that size is identical and density degree phase
Same light guiding points composition, i.e., using uniformly same laser distribution.In other embodiments, the micro structure array
It is formed for light guiding points of different sizes and different density degree, i.e., according to the specification of photovoltaic receiver, does of different sizes, density journey
Spend different distributions.Photovoltaic in wireless energy transfer system can be improved by the difference of the density of design light guiding points, size
The uniformity for the laser that receiver receives, i.e., the laser projected from light guide plate is integrally highly uniform, and optical uniformity can reach 90%
More than, this can effectively be mentioned for the laser radio energy transmission system based on light guide plate that large area uses light guide plate
Rise its photoelectric efficiency.In the light guide plate, material, size, arrangement rule and the processing method of light guiding points determine light guide plate
Output laser surface illumination and the uniformity, reasonably arranged to the light guiding points, destroy the total reflection condition of laser,
To can reach laser in the purpose of the uniform after reflection, refraction and scattering.
In some embodiments, as shown in Figure 1, the light guide plate is rectangular slab comprising four sides, bottom surface and top
Face, one of side are laser entrance face, and the top surface is laser outgoing plane, and the other three side and bottom surface are respectively provided with
There is reflecting plate 22.In the present embodiment, the reflecting plate can enter back into unscattered laser reflection in light conducting region, to mention
The utilization rate of bloom reduces power loss of the laser in light guide plate, improves the laser transmission rate in light guide plate.Reflecting plate can be adopted
With metallic reflection piece, reflection mode is mirror-reflection, and not only reflectivity is high for metal mirror, but also is conducive to laser in light guide plate
The heat transfer of generation in middle transmission process reduces influence of the temperature to equipment and device, improves the service life of equipment.When laser from
To smooth surface laser entrance face be coupled into light guide plate after, due to the presence of reflecting plate, the laser can in bottom surface of light guide plate and
Then side roundtrip is projected from the top surface of the light guide plate；When laser encounters the leaded light that bottom surface of light guide plate is arranged in
When point, since it destroys the total reflection condition of laser, the laser can scatter to all directions after being irradiated to light guiding points, from
And diffusing reflection is formed, since three sides of light guide plate and bottom surface are provided with reflecting plate, the laser is by repeatedly folding
The uniform area source to form front output is transmitted after penetrating, reflecting from the top surface of light guide plate, so that circular incident light
Spot shaping becomes square focus spot, and the uniform laser of this shape just meets plate photovoltaic receiver shape requirement, can be with
It is used cooperatively well with photovoltaic receiver.
In some embodiments, the light guiding points are hemisphere jut, column-shaped projection, regular polygon protrusion or irregular
One of polygon protrusion, but not limited to this.
In some embodiments, as shown in Figure 1, the laser radio energy transmission system based on light guide plate further includes
The beam expanding lens 40 of the laser emitter front end is set, and the laser emitter 10, beam expanding lens 40 and light guide plate 20 are successively
Positioned at same level, the photovoltaic receiver 30 is located at the surface of the light guide plate.In the present embodiment, the beam expanding lens
For the more power beam expansion lens of Galilean type, beam expanding lens is made of two eyeglasses, including one input concavees lens and one output it is convex
Lens input mirror for virtual focus beam Propagation to outgoing mirror, and two eyeglass two sides are coated with the narrowband 808nm 1000nm anti-reflection film,
Increase the light transmittance of laser.The effect of the beam expanding lens is that the laser for issuing laser emitter collimates, and reduces laser beam
The angle of divergence, adjust laser spot size, it is ensured that the laser of transmission can fully enter in light guide plate.The laser emitter hair
Laser out after beam expanding lens collimates by air or other do not connect and be transmitted to light guide plate at a distance, into light guide plate swash
Light light spot shape is circle, and the diameter of the circle laser facula is less than the lateral thickness of the light guide plate.
In some embodiments, the photovoltaic receiver is made of in series and parallel multiple photovoltaic cells, has knot
The features such as structure is simple, small in size, easy to use.The photovoltaic cell can be monocrystalline silicon, polysilicon, GaAs, indium and transfer arsenic
(InGaAs) etc. materials are constituted, and band gap width and 808nm wavelength or 1000nm laser just match, and have very high photoelectricity
Transfer efficiency.When in laser irradiation to pn-junction, electronics-hole pair is generated, is not had in the carrier that semiconductor internal junction attachment generates
Have by compound and reach space-charge region, by the attraction of built in field, electronics flows into the area n, and hole flows into the area P, as a result stores up the area n
Deposit superfluous electronics, the not no superfluous hole in the area P, they are formed about the photoproduction electric field contrary with potential barrier in pn-junction,
To generating photovoltage, which has many advantages, such as that structure is simple, performance stabilization, durable, utilization rate is high
The photovoltaic receiver also has charging control circuit, and the effect of control circuit is to maintain the stabilization of output voltage, reduces
It is illuminated the higher photovoltaic cells output voltage of light intensity, and increases the insufficient photovoltaic cells output of irradiation light intensity
Voltage improves the delivery efficiency of photovoltaic receiver to reduce output voltage difference between the two.
In some embodiments, when the laser emitter is 808nm long wavelength semiconductor laser, the photovoltaic receiver
Device is made of GaAs photovoltaic cells.The wavelength of semiconductor laser 808nm and the photovoltaic cell band gap width of GaAs material
It just matches, photoelectric conversion efficiency is up to 50%, therefore the wireless energy transfer system for using 808nm long wavelength laser, light
Receiver is lied prostrate preferably with GaAs photovoltaic cell.
In some embodiments, when the laser emitter is the diode-pumped solid laser that wavelength is greater than 1000nm
When device, the photovoltaic receiver is made of InGaAs photovoltaic cells.The diode pumping solid laser not only has
Small in size, the features such as service life is long, operating is reliable, also there is higher output power (such as 100kw), and it can be under high-power
The advantages such as higher radiance are kept, therefore are also suitble to laser radio energy transmission.It is worth noting that, the diode pumping
Optical maser wavelength caused by solid state laser is greater than 1000nm, and the solar panel for generalling use Si and GaAs material comes
It says, it is also very low in this wavelength period photoelectric conversion efficiency, it is therefore desirable to select in 1000nm laser wave strong point high conversion efficiency
Indium transfers arsenic (InGaAs) (incident photon-to-electron conversion efficiency 50% at 1000nm) photovoltaic cell.
In conclusion the laser radio energy transmission system proposed by the present invention based on light guide plate is using light guide plate as solution
The certainly key technology of receiving end light uniformity problem is changed the direction of propagation of light, is mentioned by the scattering direction of light-guide plate guides laser
The uniformity of irradiation laser on high photovoltaic receiver reduces series-parallel photovoltaic receiver due to receiving the different laser of power
Mismatch loss caused by and improves the output power and efficiency of the laser radio energy transmission system based on light guide plate.Swash simultaneously
Light is converted into area source by dotted laser in light guide plate transmission process, receives convenient for classic flat-plate type photovoltaic receiver
Laser irradiation further saves beam shaping device, reduces the energy of device so that laser is easy to be full of entire receiving panel
Amount loss, has saved the cost of system.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of laser radio energy transmission system based on light guide plate, which is characterized in that including laser emitter, light guide plate with
And photovoltaic receiver, the laser guide that the light guide plate is used to issue laser emitter to photovoltaic receiver, the light guide plate
Bottom surface be provided with for incident laser heterogeneous to be changed into the uniform outer micro structure array for penetrating laser.
2. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that micro- knot
Structure array is the light guiding points composition being arranged in array.
3. the laser radio energy transmission system according to claim 2 based on light guide plate, which is characterized in that micro- knot
Structure array is that size is identical and the identical light guiding points of density degree form.
4. the laser radio energy transmission system according to claim 2 based on light guide plate, which is characterized in that micro- knot
Structure array is that light guiding points of different sizes and different density degree form.
5. according to any laser radio energy transmission system based on light guide plate of claim 2-4, which is characterized in that institute
Stating light guiding points is one of hemisphere jut, column-shaped projection, regular polygon protrusion or irregular polygon protrusion.
6. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that the leaded light
Plate is rectangular slab comprising four sides, bottom surface and top surface, one of side are laser entrance face, and the top surface is laser
Outgoing plane, the other three side and bottom surface are provided with reflecting plate.
7. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that the leaded light
Plate material is vitreous silica.
8. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that the laser
Transmitter front-end is additionally provided with the beam expanding lens for adjusting laser spot size size；The laser emitter, beam expanding lens and
Light guide plate is located at same level, and the photovoltaic receiver is located at the surface of light guide plate.
9. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that swash when described
Optical transmitting set is 808nm long wavelength semiconductor laser, and the photovoltaic receiver is made of GaAs photovoltaic cells.
10. the laser radio energy transmission system according to claim 1 based on light guide plate, which is characterized in that when described
When laser emitter is the diode pumping solid laser that wavelength is greater than 1000nm, the photovoltaic receiver is by InGaAs photovoltaic
Battery unit composition.
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