WO2012072084A1 - Device and method of repelling flying animals - Google Patents
Device and method of repelling flying animals Download PDFInfo
- Publication number
- WO2012072084A1 WO2012072084A1 PCT/DK2011/050455 DK2011050455W WO2012072084A1 WO 2012072084 A1 WO2012072084 A1 WO 2012072084A1 DK 2011050455 W DK2011050455 W DK 2011050455W WO 2012072084 A1 WO2012072084 A1 WO 2012072084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wind turbine
- turbine generator
- reflector
- wind
- transmitter
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/24—Scaring or repelling devices, e.g. bird-scaring apparatus using electric or magnetic effects, e.g. electric shocks, magnetic fields or microwaves
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/06—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like
- A01M29/08—Scaring or repelling devices, e.g. bird-scaring apparatus using visual means, e.g. scarecrows, moving elements, specific shapes, patterns or the like using reflection, colours or films with specific transparency or reflectivity
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/24—Scaring or repelling devices, e.g. bird-scaring apparatus using electric or magnetic effects, e.g. electric shocks, magnetic fields or microwaves
- A01M29/26—Scaring or repelling devices, e.g. bird-scaring apparatus using electric or magnetic effects, e.g. electric shocks, magnetic fields or microwaves specially adapted for birds, e.g. electrified rods, cords or strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- This invention provides for a wind turbine generator with the ability to repel flying animals. More specifically, this invention provides for a reflector to be applied on the wind turbine generator where the reflector is capable of reflecting at least a portion of electromagnetic waves incident.
- Wind power is one of the fastest growing sectors of the energy industry; there has been significantly increased installation of wind turbine generators in areas, both onshore and offshore. With this there is g rowing public concern, particularly with onshore installations that flying animals, notably birds and bats, may come into contact with the wind turbine generator, and in particular the rotor. There is a growing need for practical measures to reduce or prevent a possibility of such a phenomena.
- the present invention provides for a wind turbine generator having at least one rotor blade, a reflector provided on the wind turbine generator and where the reflector is capable of reflecting at least a portion of electromagnetic waves incident thereon from a source of electromagnetic waves provided in the vicinity of the turbine.
- the reflector provided on the wind turbine generator functions to reflect electromagnetic waves thereby appearing as a source of such waves to flying animals. It is believed that flying animals such as birds and bats may be able to sense the reflected electromagnetic waves, and are repelled, thereby reducing the risk of their striking the turbine.
- a preferred feature of this invention provides for the reflective coating in the form of a reflective paint or reflective tape applied on a surface of the wind turbine generator. Such a form of coating can be readily applied to an
- the location of the reflective surface can be conveniently selected based on a variety of factors such as ease and access of application, direction of which the
- electromagnetic waves reflect or the direction at which the flying animals might approach at.
- the reflector is provided onto a surface of the biade of the wind turbine generator. This location is preferred because studies have shown that the flying animals such as birds and bats may be attracted to the rotation of the blades.
- the reflector is preferably applied at least to a portion of the leading edge of the biade of the wind turbine generator. More preferably, the reflector is provided on substantially the entire leading edge of the blade of the wind turbine generator. It appears that the leading edge may be the most effective position to provide for the reflectors on the basis that the leading edge would first come into contact with any flying animals in the vicinity.
- the reflector may be applied onto a vortex generator that is provided on the blade of the wind turbine generator.
- the vortex generator is usually manufactured separately from the biade and easily applied onto the blade after the blade is manufactured.
- the vortex generator provides a convenient structure on which to apply the reflector.
- the invention provides for the wind turbine generator further provided with a transmitter placed in the vicinity of the wind turbine generator. This transmitter functions to emit electromagnetic waves a portion of which will be reflected by the reflectors.
- the transmitter can also be movable thus enabling the transmitter to be transported and deployed at different locations within the vicinity of the wind turbine generator. This allows the direction of reflected waves to be controlled to a degree, which may be particularly relevant where the pattern of movement of flying animals may vary, for example with the seasons.
- a wind farm having a plurality of wind turbine generators and including a transmitter for transmitting electromagnetic waves, a reflector arranged on at least one wind turbine generator of the plurality of wind turbine generators and where the reflector is capable of reflecting at least a portion of the electromagnetic waves incident thereon.
- the transmitter is arranged on at least one of the plurality of the wind turbine generator.
- a wind turbine generator can act as a base for the transmitter.
- a further aspect of this invention provides for a method of operating a wind farm having a plurality of wind turbine generators and with at least one transmitter, and a reflector provided on a wind turbine generator, the method comprising of the transmitter transmitting electromagnetic waves and the reflector reflecting at least a portion of the transmitted electromagnetic waves incident thereon.
- Figure 1 shows a wind turbine generator
- Figure 2 shows a wind turbine generator and a transmitter Figure 3A shows a blade of the wind turbine generator with reflectors arranged on the blade along the leading edge
- Figure 3B shows a blade of the wind turbine generator with reflectors arranged on various surface portions of the blade.
- Figure 4 shows a blade of the wind turbine generator with the reflectors on a vortex generator of the blade.
- Figure 5 show several wind turbine generators in a wind farm and a transmitter. Detailed description of embodiments
- Figure 1 shows a wind turbine generator comprising of a blade 01, a tower 07, a hub 05 and a nacelle 03.
- the wind turbine generator is used to convert kinetic energy of wind into mechanical energy, and this mechanical energy is converted to electricity.
- Figure 2 shows an embodiment of the invention and comprises a transmitter 23 placed in the vicinity of the wind turbine generator.
- the transmitter 23 functions as a source of electromagnetic waves 25.
- a reflector 11 is provided on the wind turbine generator which functions to reflect at least a portion of the
- electromagnetic field strength should be at least 2 volts per meter.
- the transmitter 23 can be movable, for example it might be located on a vehicle such as an ai l-terrain vehicle or towed behind such a vehicle, thus enabling the transmitter to be transported and deployed at different locations within the vicinity of the wind turbine generator.
- the ability to vary the position is advantageous when the transmitter is being sited, in order to optimize its effect.
- movement patterns of the f!ying animals may be seasonal requiring different siting at different times of the year, in the case when the flying animals are not present the mobile transmitter may be removed all together from the wind farm and potentially used on another site.
- the properties of the reflector 11 in terms of size, shape, disposition and reflectivity are selected to provide a reflected signal of appropriate strength to provide a repeliant effect. Given the apparent repellent effectiveness of frequencies between 1 to 4 GHz and having a field strength of at least 2 volts per meter it is preferred that the incident wave and the reflector properties are selected to provide a reflected wave having such a field strength in the turbine vicinity.
- Figures 3A, 3B and 4 show reflector arrangements on the blades 01 of the wind turbine generator 10.
- the reflectors 11 are in a form of reflective paint layer applied to the entire length of the leading edge 11 of the blade.
- the reflectors in the form of a reflective paint are applied at certain intervals on the leading edge 11 of the blade. It appears that the leading edge is a particularly effective position to provide for the reflectors on the basis that this edge is the portion of the blade first encountered by a flying animal in the vicinity of the turbine.
- FIG 4 show reflectors associated with vortex generators on the wind turbine blade.
- vortex generators are sometimes used to improve the aerodynamic lift properties of the wind turbine blades, typically consisting of protruding fins fitted to the blade.
- the vortex generator is usually manufactured separately from the blade and applied onto the blade after the blade has been
- FIG. 2 shows a single turbine and transmitter, more usually, a number of turbines are arranged together in a "farm" or "park".
- a single transmitter is able to provide repelling electromagnetic waves for a number of wind turbine generators, with the transmitter being placed at the vicinity of the wind turbines shown in Figure 5.
- the transmitter can be arranged on one of the plurality of the wind turbine generators. In this way, the wind turbine generator can also act as a support base for the transmitter. This may reduce the amount of space that is required for the wind farm in that no additional space is require specifically for the transmitter location. More preferably, the transmitter may be mobile and can be transported and deployed at different locations as discussed above.
- the reflectors 11 are preferably applied to the blades 01, the reflector 11 can be applied to other surfaces on the wind turbine generator such as the tower 07, the hub 05 and the nacelle 03 as shown in Figure 5. This may enable further flexibility in choosing the optimized location, size, aspect etc of the relector(s) in the wind turbine generator for maximum repellent effect.
- a further embodiment of this invention provides for a wind turbine generator where, in combination with reflectors, the turbine is provided with radar absorbent material at selected portions.
- radar absorbent material can also be applied in the form of paint.
- Various types of radar absorption material are known, for example but limited to iron ball paint, foam absorbers or
- This radar absorbent material may serve to adjust or minimise the radar signature of the turbine, which may otherwise be altered by the presence of the reflectors.
Abstract
A wind turbine generator is provided with features to repel flying animals (21) such as bats, in the form of a reflector (11) provided on the wind turbine generator, such as on the rotor and/or tower where the reflector is capable of reflecting at least a portion of electromagnetic waves (25) incident thereon from a transmitter (23) provided in the vicinity of the turbine.
Description
Device and method of repeHintg flying asiirtiafs Field of Invention;
This invention provides for a wind turbine generator with the ability to repel flying animals. More specifically, this invention provides for a reflector to be applied on the wind turbine generator where the reflector is capable of reflecting at least a portion of electromagnetic waves incident.
Background of the invention;
Wind power is one of the fastest growing sectors of the energy industry; there has been significantly increased installation of wind turbine generators in areas, both onshore and offshore. With this there is g rowing public concern, particularly with onshore installations that flying animals, notably birds and bats, may come into contact with the wind turbine generator, and in particular the rotor. There is a growing need for practical measures to reduce or prevent a possibility of such a phenomena.
It is known in the art to use emitted electromagnetic radiation in an attempt to warn flying animals and to ward them away from wind turbines . For example, U.S. Pat, No. 5,774,088 has documented the use of a source of microwave energy on the turbine, it is however not practical to install an electromagnetic radiation emitting device on every wind turbine in a wind farm.
It is an object of the invention to avoid or mitigate the disadvantages set out above.
Summary of the invention;
The present invention provides for a wind turbine generator having at least one rotor blade, a reflector provided on the wind turbine generator and where the reflector is capable of reflecting at least a portion of electromagnetic waves incident thereon from a source of electromagnetic waves provided in the vicinity of the turbine.
The reflector provided on the wind turbine generator functions to reflect electromagnetic waves thereby appearing as a source of such waves to flying animals. It is believed that flying animals such as birds and bats may be able to sense the reflected electromagnetic waves, and are repelled, thereby reducing the risk of their striking the turbine.
A preferred feature of this invention provides for the reflective coating in the form of a reflective paint or reflective tape applied on a surface of the wind turbine generator. Such a form of coating can be readily applied to an
appropriate surface such as the blade, nacelle, or hub. in this way, the location of the reflective surface can be conveniently selected based on a variety of factors such as ease and access of application, direction of which the
electromagnetic waves reflect or the direction at which the flying animals might approach at.
Preferably, the reflector is provided onto a surface of the biade of the wind turbine generator. This location is preferred because studies have shown that the flying animals such as birds and bats may be attracted to the rotation of the blades.
The reflector is preferably applied at least to a portion of the leading edge of the biade of the wind turbine generator. More preferably, the reflector is provided on substantially the entire leading edge of the blade of the wind turbine generator. It appears that the leading edge may be the most effective position to provide for the reflectors on the basis that the leading edge would first come into contact with any flying animals in the vicinity.
Alternatively or additionally, the reflector may be applied onto a vortex generator that is provided on the blade of the wind turbine generator. The vortex generator is usually manufactured separately from the biade and easily applied onto the blade after the blade is manufactured. Thus, the vortex generator provides a convenient structure on which to apply the reflector.
Additionally, the invention provides for the wind turbine generator further provided with a transmitter placed in the vicinity of the wind turbine generator. This transmitter functions to emit electromagnetic waves a portion of which will be reflected by the reflectors. The transmitter can also be movable thus enabling the transmitter to be transported and deployed at different locations within the vicinity of the wind turbine generator. This allows the direction of reflected waves to be controlled to a degree, which may be particularly relevant where the pattern of movement of flying animals may vary, for example with the seasons.
In a further aspect of this invention, there is provided a wind farm having a plurality of wind turbine generators and including a transmitter for transmitting electromagnetic waves, a reflector arranged on at least one wind turbine generator of the plurality of wind turbine generators and where the reflector is capable of reflecting at least a portion of the electromagnetic waves incident thereon. Preferably, the transmitter is arranged on at least one of the plurality of the wind turbine generator. In this arrangement, a wind turbine generator can act as a base for the transmitter.
A further aspect of this invention provides for a method of operating a wind farm having a plurality of wind turbine generators and with at least one transmitter, and a reflector provided on a wind turbine generator, the method comprising of the transmitter transmitting electromagnetic waves and the reflector reflecting at least a portion of the transmitted electromagnetic waves incident thereon.
Brief Description of Figures:
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings, in which :
Figure 1 shows a wind turbine generator
Figure 2 shows a wind turbine generator and a transmitter
Figure 3A shows a blade of the wind turbine generator with reflectors arranged on the blade along the leading edge
Figure 3B shows a blade of the wind turbine generator with reflectors arranged on various surface portions of the blade.
Figure 4 shows a blade of the wind turbine generator with the reflectors on a vortex generator of the blade.
Figure 5 show several wind turbine generators in a wind farm and a transmitter. Detailed description of embodiments
Figure 1 shows a wind turbine generator comprising of a blade 01, a tower 07, a hub 05 and a nacelle 03. The wind turbine generator is used to convert kinetic energy of wind into mechanical energy, and this mechanical energy is converted to electricity.
Figure 2 shows an embodiment of the invention and comprises a transmitter 23 placed in the vicinity of the wind turbine generator. The transmitter 23 functions as a source of electromagnetic waves 25. A reflector 11 is provided on the wind turbine generator which functions to reflect at least a portion of the
electromagnetic waves 25 incident thereon, as indicated 27, Although only a single reflector is shown in figure 2, the reflector 11 can be applied to a wide area or to several portions of the wind turbine generator. It is believed that the electromagnetic waves 25 are able to be sensed by flying animals 21 warning them of the presence of the wind turbine generator and therefore deterring them from flying towards the wind turbine generator 10. Studies have suggested that radio wave frequencies between 1 to 4 GHz that is in the ultra high to super high area of the frequency spectrum ,or L and S bands are particularly effective in repelling flying animals. Further studies have also suggested that the
electromagnetic field strength should be at least 2 volts per meter.
The transmitter 23 can be movable, for example it might be located on a vehicle such as an ai l-terrain vehicle or towed behind such a vehicle, thus enabling the transmitter to be transported and deployed at different locations within the vicinity of the wind turbine generator. The ability to vary the position is
advantageous when the transmitter is being sited, in order to optimize its effect. Moreover, movement patterns of the f!ying animals may be seasonal requiring different siting at different times of the year, in the case when the flying animals are not present the mobile transmitter may be removed all together from the wind farm and potentially used on another site.
The properties of the reflector 11 in terms of size, shape, disposition and reflectivity are selected to provide a reflected signal of appropriate strength to provide a repeliant effect. Given the apparent repellent effectiveness of frequencies between 1 to 4 GHz and having a field strength of at least 2 volts per meter it is preferred that the incident wave and the reflector properties are selected to provide a reflected wave having such a field strength in the turbine vicinity. Figures 3A, 3B and 4 show reflector arrangements on the blades 01 of the wind turbine generator 10. In Figure 3A, the reflectors 11 are in a form of reflective paint layer applied to the entire length of the leading edge 11 of the blade. In figure 3B, the reflectors in the form of a reflective paint are applied at certain intervals on the leading edge 11 of the blade. It appears that the leading edge is a particularly effective position to provide for the reflectors on the basis that this edge is the portion of the blade first encountered by a flying animal in the vicinity of the turbine.
Figure 4 show reflectors associated with vortex generators on the wind turbine blade. Such vortex generators are sometimes used to improve the aerodynamic lift properties of the wind turbine blades, typically consisting of protruding fins fitted to the blade.. The vortex generator is usually manufactured separately from the blade and applied onto the blade after the blade has been
manufactured. Applying the reflector onto the vortex generator prior to applying it onto the blade provides a convenient and simple manner of attaching the reflector. The reflector can alternatively be applied to both vortex generators and other locations on the wind turbine blade such as the leading edge.
While Figure 2 shows a single turbine and transmitter, more usually, a number of turbines are arranged together in a "farm" or "park". In this case, a single transmitter is able to provide repelling electromagnetic waves for a number of wind turbine generators, with the transmitter being placed at the vicinity of the wind turbines shown in Figure 5. Alternatively, the transmitter can be arranged on one of the plurality of the wind turbine generators. In this way, the wind turbine generator can also act as a support base for the transmitter. This may reduce the amount of space that is required for the wind farm in that no additional space is require specifically for the transmitter location. More preferably, the transmitter may be mobile and can be transported and deployed at different locations as discussed above.
Although the reflectors 11 are preferably applied to the blades 01, the reflector 11 can be applied to other surfaces on the wind turbine generator such as the tower 07, the hub 05 and the nacelle 03 as shown in Figure 5. This may enable further flexibility in choosing the optimized location, size, aspect etc of the relector(s) in the wind turbine generator for maximum repellent effect.
A further embodiment of this invention (not illustrated) provides for a wind turbine generator where, in combination with reflectors, the turbine is provided with radar absorbent material at selected portions. Such absorbent material can also be applied in the form of paint. Various types of radar absorption material are known, for example but limited to iron ball paint, foam absorbers or
Jaumann absorbers. This radar absorbent material may serve to adjust or minimise the radar signature of the turbine, which may otherwise be altered by the presence of the reflectors.
Claims
1. A wind turbine generator comprising :
a rotor having at least one blade;
a reflector provided on the wind turbine generator,
wherein the reflector is capable of reflecting at least a portion of electromagnetic waves incident thereon from a source in the vicinity of the wind turbine generator.
2, The wind turbine generator as claimed in claim 1 wherein the reflector comprises a reflective coating in a form of a paint applied on a surface of the wind turbine generator.
3. The wind turbine generator as claimed in claim 1 or 2, wherein the reflector is provided onto a surface of the blade of the wind turbine generator.
4. The wind turbine generator as claimed in claim 1, 2 or 3, wherein the reflector is provided on a vortex generator provided on a blade of the wind turbine generator.
5. The wind turbine generator as claimed in claim 1, 2 or 3, wherein the reflector is provided on a portion of the leading edge of the blade of the wind turbine generator.
6. The wind turbine generator as claimed in claim 5, wherein the reflector is provided on substantially the entire leading edge of the blade of the wind turbine generator.
7. The wind turbine generator as claimed in claim 5, wherein the reflector is provided both on a portion of the leading edge of the blade and on a vortex generator provided on the blade of the wind turbine generator.
8. The wind turbine generator as claimed in claim 1 further comprising a transmitter of electromagnetic radiation placed at the vicinity of the wind turbine generator.
9. The wind turbine generator as claimed in claim 8 wherein the transmitter is movable.
10. The wind turbine generator as claimed in claim 9 wherein the transmitter is adapted to emit electromagnetic waves of between 1 to 4 GHz and with a strength of at least 2 volts per meter.
11. A wind farm comprising :
a plurality of wind turbine generators;
a transmitter for transmitting electromagnetic waves,
a reflector arranged on at least one wind turbine generator of the plurality of wind turbine generators,
wherein the reflector is capable of reflecting at least a portion of the electromagnetic waves incident thereon.
12. The wind farm as claimed in claim 11 wherein the transmitter is arranged on one of the plurality of the wind turbine generators.
13. The wind farm as claimed in claim 12 wherein the transmitter is arranged on
He of the wind turbine generator.
14. The wind farm as claimed in claim 13 wherein the transmitter is movable.
15. The wind farm as claimed in any one of claims 11 to 14 wherein the reflector comprises a reflective coating in the form of a paint applied on a surface of the wind turbine generator.
16. The wind farm as claimed in claim 15, wherein the reflector is provided on a surface of a rotor blade of the wind turbine generator.
1 /. The wind farm as ciaimed in ciaimed 15, wherein the reflector is provided on a vortex generator provided on a blade of the wind turbine generator,
18. The wind farm as ciaimed in claim 16, wherein the reflector is provided on a portion of the leading edge of the rotor blade.
19. The wind farm as ciaimed in any one of claims 15 to 18 further comprising a radar absorbent material applied onto a part of the wind turbine generator.
20. The wind farm as claimed in claim 19 wherein the radar absorbent material comprises a paint applied onto the wind turbine generator.
21. A method of operating a wind farm comprising a plurality of wind turbine generators, at least one transmitter, and a reflector provided on at least one wind turbine generator, the method comprising;
a) the transmitter transmitting electromagnetic waves;
b) the reflector reflecting at least a portion of the transmitted
electromagnetic waves.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41956610P | 2010-12-03 | 2010-12-03 | |
| DKPA201070528 | 2010-12-03 | ||
| DKPA201070528 | 2010-12-03 | ||
| US61/419,566 | 2010-12-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012072084A1 true WO2012072084A1 (en) | 2012-06-07 |
Family
ID=45372174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DK2011/050455 WO2012072084A1 (en) | 2010-12-03 | 2011-11-30 | Device and method of repelling flying animals |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2012072084A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9523279B2 (en) | 2013-11-12 | 2016-12-20 | General Electric Company | Rotor blade fence for a wind turbine |
| US20180002034A1 (en) * | 2016-07-01 | 2018-01-04 | Maurice A. Khawam | Aircraft lighting system |
| CN108142408A (en) * | 2017-12-22 | 2018-06-12 | 江苏金风科技有限公司 | Bird-repeller system, method and its wind power plant and marine wind electric field of wind power plant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2918671A (en) * | 1946-01-15 | 1959-12-22 | Halpern Otto | Identifying reflector with reflection dissymmetry |
| US5774088A (en) | 1994-07-26 | 1998-06-30 | The University Of Pittsburgh | Method and system for warning birds of hazards |
| US6250255B1 (en) * | 1998-08-06 | 2001-06-26 | Virginia Commonwealth University | Methods and apparatus for alerting and/or repelling birds and other animals |
| US20100098844A1 (en) * | 2008-04-02 | 2010-04-22 | Frank Emest Pettinger | Application of ultraviolet reflective materials to surfaces to enhance avian and human safety |
| US20100236497A1 (en) * | 2005-07-01 | 2010-09-23 | Precise Flight, Inc. | System for controlling the interaction of animals and objects |
-
2011
- 2011-11-30 WO PCT/DK2011/050455 patent/WO2012072084A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2918671A (en) * | 1946-01-15 | 1959-12-22 | Halpern Otto | Identifying reflector with reflection dissymmetry |
| US5774088A (en) | 1994-07-26 | 1998-06-30 | The University Of Pittsburgh | Method and system for warning birds of hazards |
| US6250255B1 (en) * | 1998-08-06 | 2001-06-26 | Virginia Commonwealth University | Methods and apparatus for alerting and/or repelling birds and other animals |
| US20100236497A1 (en) * | 2005-07-01 | 2010-09-23 | Precise Flight, Inc. | System for controlling the interaction of animals and objects |
| US20100098844A1 (en) * | 2008-04-02 | 2010-04-22 | Frank Emest Pettinger | Application of ultraviolet reflective materials to surfaces to enhance avian and human safety |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9523279B2 (en) | 2013-11-12 | 2016-12-20 | General Electric Company | Rotor blade fence for a wind turbine |
| US20180002034A1 (en) * | 2016-07-01 | 2018-01-04 | Maurice A. Khawam | Aircraft lighting system |
| US10220959B2 (en) * | 2016-07-01 | 2019-03-05 | Maurice A Khawam | Aircraft lighting system |
| CN108142408A (en) * | 2017-12-22 | 2018-06-12 | 江苏金风科技有限公司 | Bird-repeller system, method and its wind power plant and marine wind electric field of wind power plant |
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