There exists a need for an improved system and method that allow for wireless energy and/or data transfer between unmanned vehicles, sensor units, and refueling units.
Disclosed herein is are embodiments of a system and method that provide for wireless power and/or data transfer in air or other fluid mediums by way of a towed, tethered, or mechanically linked off-body coil device that can passively or autonomously be positioned proximate to or onto a mating coil device, which may also be towed, tethered, mechanically linked or autonomously driven. Various embodiments of the system and method may use components such as mechanical or cable linkage, wire coils, positioning devices, homing, capture, and/or delivery devices. Although the embodiments are primarily discussed with reference to wireless energy and/or data transfer using unmanned vehicles, such systems and methods may also be utilized with manned vehicles, including surface vehicles, undersea vehicles, airborne vehicles, and road-based vehicles.
UUV 20 includes a coil 22. It should be noted that although UUV 20 is shown with only one coil 22, that UUV 20 or any other UV that may be used in accordance with the systems and methods disclosed herein, may include multiple coils towed by the UV or positioned in similar or different locations with respect to the UV. In one embodiment, coil 22 is embedded within the underside of UUV 20, while in another embodiment coil 22 is secured to the exterior of the underside of UUV 20.
The positioning of coil 22 at the underside of UUV 20 helps to ensure a better wireless power and data transfer with a coil 42 within receiving station 40, which is configured for UUV 20 to be situated directly overhead during wireless power and data transfer. However, it should be recognized that coil 22 may be situated in other areas of UUV 20, such as near the topside, fore, or aft, depending upon where UUV 20 is to be positioned with respect to coil 42 within receiving station 40. As an example, if the front of UUV 20 is to be positioned closest to coil 42, coil 22 may be situated at the front of UUV 20.
Coils 22 and 42 may be any type of coil that allows for wireless power and data transfer. As an example, coil 22 and 42 may be configured such as coil structure 700 shown in
In operation, when UUV 20 comes within a distance D to receiving station 40, as shown by arrow 60 in
To position UUV 20 in such a position, several methods may be used. In some embodiments, the positioning is performed autonomously using a signal, such as an optical or acoustic signal, from UUV 20 and/or receiving station 40. In some embodiments, the positioning is performed autonomously by UUV 20 using machine vision. Once coil 22 in UUV 20 is positioned directly over coil 42 or substantially close to coil 42 depending upon the wireless transmission/reception capabilities of coils 22 and 42, wireless power and/or data transfer between coils 22 and 42 may commence, as shown by arrows 44 in
As shown, UUV 20 is configured to operate in an underwater environment. However, as noted above, a differently configured unmanned vehicle (UV) may be used which is configured to operate in a land-based and/or air-based environment. An example component configuration that may be used for UUV 20 or other UV is shown in diagram 100 shown in
Further, it should be recognized by a person having ordinary skill in the art that the system for UUV 20 or other UV may be configured with more or less components and/or modules than those shown and described herein, depending upon factors including, but not limited to, the type, purpose, and operation of the selected UV or UUV. As an example, UUV 20 or other UV may have components for DC-AC or AC-DC power conversion or AC-AC conversion for allowing wireless energy transfer.
Storage unit 30 serves as the source of data and energy transmitted to a UV, such as UUV 20, and/or a storage unit for data and energy received from a UV when the UV is transferring data and/or energy to the UV. In some embodiments, storage unit 30, or any of the storage units shown and described herein, may comprise a self-sustaining unit, such as a renewable energy source. In some embodiments, storage unit 30 may include various types of energy sources, such as a fixed energy source and a renewable energy source. Further, in some embodiments, storage unit 30 may be a permanent source of energy and/or data such as a land-based power line or data network. In such embodiments, the distance between receiving station 40 and storage unit 30 may be considerable.
An example component configuration of storage unit 30 is shown in diagram 200 shown in
Receiving station 40 may comprise any device, structure, or mechanism that has a coil integrated into it, disposed thereon, or otherwise connected thereto that allows for a UV to position itself such that wireless energy and/or data transfer may occur. As an example, receiving station 40 may be a mat, such as is shown in
As an example, coil 320, or any of the other tethered, towed, or otherwise disposed coils shown and described herein, may be an active or autonomous coil with three-dimensional translation capabilities to help locate, mate, or otherwise latch onto coils such as those located on mat 340 or otherwise operatively connected to an energy source. Such coils could use a variety of methods for positioning themselves, including but not limited to, propelling, driving, flying, or swimming, using homing devices that utilize, for example, optical, chemical, acoustic, and/or temperature-based methods, propulsors, wheels, thrusters, vortex generators, buoyancy devices, and other maneuvering methods.
As an example, mat 340, or any of the mats shown and described herein, may be positioned on land, on the surface of a body of water, or underwater. In embodiments wherein mat 340 is positioned within the maritime domain, mat 340 may be moored or integrated to a surface vessel, submarine, buoy, ocean/wave glider, or other maritime platform as would be recognized by a person having ordinary skill in the art.
Mat 340 includes a plurality of coils 350 embedded/integrated/disposed therein. As an example, coils 350 are recessed within mat 340 such that as coil 320 is being directed over mat 340 it is passively directed towards coils 350. As an example, coils 350 may be serially connected or connected in a grid, and are connected to an energy source 360. Further, in some embodiments, coils 350 may be unconnected from each other and form an array of coils each individually connected to energy source 360. Coils 350 are configured to wirelessly transfer and/or receive data to/from coil 320 as coil 320 proceeds over coils 350 such as in a path as shown by arrow 370. Coils 320 and 350 may be configured to be transmitting coils, receiving coils, or both a transmitting and receiving coils, depending upon the specific configuration of the operating system.
In some embodiments, coils 320 and 350, as well as any other coils shown and described herein, may contain one or more magnets and/or mechanical devices within or disposed about the coil to help capture and/or position a second coil in such a manner that wireless energy and/or data transfer may occur with maximum efficiency. For example, coils 350 may have a ring of magnets disposed around the perimeter thereof to help attract similarly situated magnets, but of opposite polarity, disposed around the perimeter of coil 320.
Coil 450 is connected to an energy source 460. Coil 450 is configured to wirelessly transfer and/or receive data to/from coil 420 as coil 420 is positioned directly over coil 450 or substantially close to coil 450 depending upon the wireless transmission/reception capabilities of coils 420 and 450. Coils 420 and 450 may be configured to be transmitting coils, receiving coils, or both a transmitting and receiving coils, depending upon the specific configuration of the operating system.
Guide rails 470 and 472 are disposed on mat 440 and angled in such a manner to direct coil 420 towards coil 450 as shown by arrow 480. As an example, guide rails 470 and 472 may comprise various materials, including non-corrosive metals and polymers. Further, guide rails 470 and 472 may be designed to be various heights depending upon, for example, the location of coil 420 from mat 440 and/or the thickness of coil 420.
As an example of operation, receiving station 540 may spool out tether 570 after it sends a ping receipt acknowledgement to UV 510. UV 510 may then position itself such that coils 520 and 560 are in position to wirelessly transmit and/or receive data and/or energy as discussed above. When transmission is complete, receiving station 540 may retract tether 570. The system configuration shown in
As shown in
As an example, storage unit 630 may be configured similarly as shown in
Further, storage unit 630 may be passive or autonomous. A passive storage unit 630 would require UUV 610 to position itself such that opening 612 is over storage unit 630. Then, UUV 610 would have to use some mechanism to secure storage unit 630 to UUV 610. As an example, storage unit 630 could be secured to UUV 610 by a number of methods including, but not limited to magnetic, hydraulic, or buoyancy methods. An autonomous storage unit 630 would contain the appropriate circuitry and components (e.g. accelerometers, thrusters, strobe lights, vision or acoustic guidance sensors) therein to allow for autonomous positioning of storage unit 630 from floor 640 to within opening 612 as is shown by the arrows in
As an illustrative example of operation, a first device 632 operatively connected to an underwater energy source 630 and having a processor therein (such as controller 210 in
In some embodiments, UUV 610 may wait until all of the data and/or power is transferred to it from energy source 630 prior to continuing on its way. In such a scenario, energy source will reposition itself such that it is no longer located within opening 612 prior to the departure of UUV 610. In some embodiments, once energy source 630 is located within opening 612 and power and/or data transfer has begun, UUV 610 may continue on to perform its operational scenarios while the power and/or data transfer is occurring. As discussed with reference to method 900 below, UUV 610 may then find another energy source location or return to the same energy source location when it is in need of additional power and/or data.
As an example, sealant 720 may be a polyurethane waterproofing sealant. Shielding plate 730, which may comprise ferrite, powder iron, or a meta-material, is disposed over a thermally conductive sealant 740, within which is disposed a coil 750. Coil 750 may be comprised of various materials including copper wire, Litz wire, graphene, or superconductor material. As an example, coil 750 may comprise 700 strands of 40 AWG wire (˜12 AWG) and may be approximately 0.12″ in diameter, providing for a high current (>25 A) and low impedance (1.5 Ω/kft) at 100 kHz.
One embodiment of a coil that may be used for transmission of power and/or data may include a spiral wire wound 13 turns with an outside diameter of 5.7″ and an inside diameter of 2.0″, and 18 uH. One embodiment of a coil that may be used for reception of power and/or data may include a spiral wire wound 10 turns with an outside diameter of 4.8″ and an inside diameter of 2.0″, and 10 uH.
Coil structure 700 may further include a plurality of resistors located within housing 710 to help generate the thermal load. For example, housing 710 may contain 30 resistors connected in series to produce a 100 W thermal load at 120 VAC.
Step 910 involves positioning a first device, such as, for example, device 42 shown in
It should be recognized by a person having ordinary skill in the art that the positioning of the first device and second device within a wireless transmission range of step 910 could involve only movement of the first device, only movement of the second device, or a combination of movement from both the first device and the second device. For example, as shown in
In some embodiments, step 910 is performed passively using a static alignment structure, such as guard rails 470 and 472 shown in
In some embodiments, step 910 is performed autonomously using a signal from the UV. As an example, the signal may be either an optical signal or an acoustic signal. In some embodiments, step 910 is performed autonomously by the first device using machine vision. In embodiments using an optical signal, the UV may contain optical sensors such as photomultiplier tubes or cameras to assist in performing step 910.
Step 920 involves wirelessly transferring at least one of power and data from the energy source to the UV via the first device and the second device, such as shown by arrows 44 between devices 22 and 42 in
In some embodiments, method 900 may involve, prior to step 910, with a step of establishing communication between a UV, such as UV 20 shown in
As a further example, if storage units 630 are configured to be autonomous and include the appropriate components, circuitry, and software, UUV 610 could send a first ping to storage unit 630, storage unit 630 could send a second ping to UUV 610 to establish communication, after which storage unit 630 could autonomously position itself such that device 632 is within wireless transmission range with device 614.
In some embodiments, method 900 may proceed to step 930, which involves performing one or more operational scenarios using the UV. Such operational scenarios can include any number of activities for which an UV may be used, such as data gathering, data transfer, surveillance, payload delivery, and the like. After such operational scenarios, the UV may return to the same energy source to receive additional data and/or power or may return to an energy source in another location. In either situation, the unmanned vehicle would receive additional data and/or power using the same process as described in steps 910 and 920 above.
As one example, upon running low on power from one storage unit 630, UUV 610 may return to the same energy source location to “swap out” its current storage unit 630 for a storage unit 630 that is “fully charged”. As noted above, UUV 610 may continue with its operational scenarios during power and/or data transmission, rather than waiting for power and/or data transfer to terminate.
Method 900 may be implemented as a series of modules, either functioning alone or in concert, with physical electronic and computer hardware devices. Method 900 may be computer-implemented as a program product comprising a plurality of such modules, which may be displayed for a user.
Various storage media, such as magnetic computer disks, optical disks, and electronic memories, as well as non-transitory computer-readable storage media and computer program products, can be prepared that can contain information that can direct a device, such as a micro-controller, to implement the above-described systems and/or methods. Once an appropriate device has access to the information and programs contained on the storage media, the storage media can provide the information and programs to the device, enabling the device to perform the above-described systems and/or methods.
For example, if a computer disk containing appropriate materials, such as a source file, an object file, or an executable file, were provided to a computer, the computer could receive the information, appropriately configure itself and perform the functions of the various systems and methods outlined in the diagrams and flowcharts above to implement the various functions. That is, the computer could receive various portions of information from the disk relating to different elements of the above-described systems and/or methods, implement the individual systems and/or methods, and coordinate the functions of the individual systems and/or methods.
Many modifications and variations of the Wireless Power and Data Transfer for Unmanned Vehicles are possible in light of the above description. Within the scope of the appended claims, the embodiments of the systems described herein may be practiced otherwise than as specifically described. The scope of the claims is not limited to the implementations and the embodiments disclosed herein, but extends to other implementations and embodiments as may be contemplated by those having ordinary skill in the art.
This application is a continuation of U.S. application Ser. No. 15/001,101, which was filed on 19 Jan. 2016.
This invention is assigned to the United States Government and is available for licensing for commercial purposes. Licensing and technical inquiries may be directed to the Office of Research and Technical Applications, Space and Naval Warfare Systems Center, Pacific, Code 72120, San Diego, Calif., 92152; phone (619) 553-5118; email ssc_pac_T2@navy.mil; reference Navy Case Number 108916.
Number | Name | Date | Kind |
---|---|---|---|
6167831 | Watt | Jan 2001 | B1 |
6223675 | Watt | May 2001 | B1 |
6808021 | Zimmerman | Oct 2004 | B2 |
8109223 | Jamieson | Feb 2012 | B2 |
9860358 | Park | Jan 2018 | B2 |
20020083880 | Shelton | Jul 2002 | A1 |
20100007214 | Howard | Jan 2010 | A1 |
20140091626 | Walley | Apr 2014 | A1 |
20140094116 | Walley | Apr 2014 | A1 |
20140253025 | Van Wiemeersch | Sep 2014 | A1 |
20140257614 | Niizuma | Sep 2014 | A1 |
20140347007 | Kee | Nov 2014 | A1 |
20150211368 | Kalwa | Jul 2015 | A1 |
20150333573 | Leabman | Nov 2015 | A1 |
20150371771 | Abu Qahouq | Dec 2015 | A1 |
20160009187 | Niizuma | Jan 2016 | A1 |
20160013837 | Howell | Jan 2016 | A1 |
20160049799 | Takatsu | Feb 2016 | A1 |
20160052450 | Chan | Feb 2016 | A1 |
20160087691 | Van Wageningen | Mar 2016 | A1 |
20160236760 | Siesjo | Aug 2016 | A1 |
20160261120 | Riehl | Sep 2016 | A1 |
20160264223 | Ferguson | Sep 2016 | A1 |
20160304217 | Fisher | Oct 2016 | A1 |
20160311329 | Rodriguez | Oct 2016 | A1 |
20160334793 | Celikkol | Nov 2016 | A1 |
20160336805 | Yoshida | Nov 2016 | A1 |
20160341578 | Park | Nov 2016 | A1 |
20170015415 | Chan | Jan 2017 | A1 |
20170021946 | Weller | Jan 2017 | A1 |
20170113768 | Jamieson | Apr 2017 | A1 |
20170141583 | Adolf | May 2017 | A1 |
20170207658 | Bana | Jul 2017 | A1 |
20170240061 | Waters | Aug 2017 | A1 |
20170271926 | Plekhanov | Sep 2017 | A1 |
20180041072 | Clifton | Feb 2018 | A1 |
20180068165 | Cantrell | Mar 2018 | A1 |
20180141682 | Blake | May 2018 | A1 |
20180275649 | Harnett | Sep 2018 | A1 |
20180277860 | Eickhoff | Sep 2018 | A1 |
Number | Date | Country | |
---|---|---|---|
Parent | 15001101 | Jan 2016 | US |
Child | 16114329 | US |