Efficient flight operations based on naturally present energy sources or sinks

    公开(公告)号:US10891868B1

    公开(公告)日:2021-01-12

    申请号:US16138902

    申请日:2018-09-21

    Abstract: Changes in energy of an aerial vehicle that are unrelated to any operational changes in the aerial vehicle may be associated with energy sources or sinks naturally present at a location. Air flows generated due to contrasts in surface temperatures or terrain features at locations may cause energy levels of aerial vehicles to rise or fall. Locations of changes in energy may be recorded and used to generate a map or other representation of energy within an area. The map or other representation may be used in selecting optimal routes for aerial vehicles within the area. Additionally, a machine learning system may be trained using maps or representations of energy within areas and images of such areas. An image of an area may be provided to a trained machine learning system as an input, and a representation of energy within the area may be generated based on an output.

    Navigating using electromagnetic signals

    公开(公告)号:US10378902B1

    公开(公告)日:2019-08-13

    申请号:US15601602

    申请日:2017-05-22

    Abstract: A system to determine position and/or heading may include a receiver including at least two antennas configured to be coupled to the vehicle and receive electromagnetic signals including at least one of microwaves or radio waves. The system may also include a navigation module configured to determine first and second locations associated with respective first and second transmitters that send respective first and second signals. The navigation module may also be configured to determine, based at least in part on the first signals, a first relative orientation of the receiver relative to the first transmitter, and determine, based at least in part on the second signals, a second relative orientation of the receiver relative to the second transmitter. The navigation module may also be configured to determine a position and/or heading of the vehicle based at least in part on the first and second relative orientations of the receiver.

    Mechanical vibration based inter-module communication in vehicle

    公开(公告)号:US11542001B1

    公开(公告)日:2023-01-03

    申请号:US16941240

    申请日:2020-07-28

    Abstract: Components of a device may transmit signals between one another using piezo electric transducers (PETs). In a basic system, a first PET may be coupled to and/or in contact with a first location on a member. A second PET may be coupled to and/or in contact with a second location on the member and separated from the first PET by a distance. The first PET may receive a signal (e.g., an electrical voltage) and convert the signal to a mechanical force/stress causing vibration of the member. The vibration may propagate through the member to other locations about the member. The second PET receive the vibration and may convert the vibration back to the signal, such as by converting mechanical force/stress to the electrical voltage (i.e., the signal). A similar process may be performed in reverse to enable the first and second PET to provide two-way communication.

    Charging mat for unmanned aircraft

    公开(公告)号:US10418830B1

    公开(公告)日:2019-09-17

    申请号:US15711883

    申请日:2017-09-21

    Abstract: Systems for landing and facilitating power flow or data transfer between an unmanned aerial vehicle (UAV) and a charging mat using a boom are described. The system includes a mat with a conductive mesh on the top and a conductive surface on the other bottom of the mat. The conductive mesh and bottom conductive surface are separated (electrically isolated) by an isolation core. The outer portion of the boom contacts part of the conductive mesh of the mat to create an electrical pathway. An inner portion of the boom penetrates through the top layer conductive mesh, through the isolating core, and contacts the bottom conductive surface of the mat to create another electrical pathway.

    Navigating using electromagnetic signals

    公开(公告)号:US11204248B2

    公开(公告)日:2021-12-21

    申请号:US16507384

    申请日:2019-07-10

    Abstract: A system to determine position and/or heading may include a receiver including at least two antennas configured to be coupled to the vehicle and receive electromagnetic signals including at least one of microwaves or radio waves. The system may also include a navigation module configured to determine first and second locations associated with respective first and second transmitters that send respective first and second signals. The navigation module may also be configured to determine, based at least in part on the first signals, a first relative orientation of the receiver relative to the first transmitter, and determine, based at least in part on the second signals, a second relative orientation of the receiver relative to the second transmitter. The navigation module may also be configured to determine a position and/or heading of the vehicle based at least in part on the first and second relative orientations of the receiver.

    Selection of satellites for global positioning system

    公开(公告)号:US11035959B1

    公开(公告)日:2021-06-15

    申请号:US15491783

    申请日:2017-04-19

    Abstract: A system may include a global positioning system (GPS) receiver and inertial measurement units configured to generate signals representative of relative motion of the GPS receiver. The system may also include a navigation processor configured to receive a first position determination from the GPS receiver, and determine relative motion of the GPS receiver with respect to the first position determination based at least in part on signals received from the inertial measurement units. The navigation processor may also receive second respective distances between the GPS receiver and respective satellites based on signals received from the respective satellites, and determine second projected distances between the GPS receiver and the respective satellites based on the relative motion determination. The navigation processor may also select satellites from among the respective satellites for determining a second position of the GPS receiver based on a comparison of second respective distances and the second projected distances.

    Precise transmission medium delay measurement

    公开(公告)号:US10698030B1

    公开(公告)日:2020-06-30

    申请号:US16418528

    申请日:2019-05-21

    Abstract: A measurement system may measure a fractional time delay of transmission of a signal across a medium, such as a cable. The system may use a first clock to assist in creating and injecting an injected sequence (signal) into the medium. A second, slower clock may be used for sampling the sequence after transmission of the sequence through the medium. This causes a time Vernier scale effect that results in a sampled sequence that has a one-step skip for each instances of the sequence, where the sequence has N elements in the sequence. The location of the skip within the sequence will depend on the magnitude of the delay measured as a fraction of a clock period with a resolution of N. To measure this delay, a modified version of a pseudo-random sequence generator, capable of skipping one step, is used to determine the output.

    Charging mat for unmanned aircraft

    公开(公告)号:US11143784B1

    公开(公告)日:2021-10-12

    申请号:US16504559

    申请日:2019-07-08

    Abstract: Systems for landing and facilitating power flow or data transfer between an unmanned aerial vehicle (UAV) and a charging mat using a boom are described. The system includes a mat with a conductive mesh on the top and a conductive surface on the other bottom of the mat. The conductive mesh and bottom conductive surface are separated (electrically isolated) by an isolation core. The outer portion of the boom contacts part of the conductive mesh of the mat to create an electrical pathway. An inner portion of the boom penetrates through the top layer conductive mesh, through the isolating core, and contacts the bottom conductive surface of the mat to create another electrical pathway.

    Simulating inertial motion using true inertial motion

    公开(公告)号:US10883852B1

    公开(公告)日:2021-01-05

    申请号:US15881606

    申请日:2018-01-26

    Abstract: Where a body includes one or more inertial motion sensors, such as gyroscopes or accelerometers, the body's response to inertial motion may be simulated by actually imparting inertial motion to the sensors, and interpreting signals received from such sensors in response to the inertial motion. Gyroscopes or accelerometers of an aerial vehicle may be physically removed therefrom and remain in communication with an inertial navigation system, and rotated by one or more motors or motorized components to simulate angular velocities on the gyroscopes or accelerations on the accelerometers. Signals received by the inertial navigation system from the gyroscopes or the accelerometers may be evaluated to confirm the operability of the gyroscopes and accelerometers, the responsiveness of the inertial navigation system to sensed inertial motion or events associated with such inertial motion, or any other aspect of the aerial vehicle.

    Mechanical vibration based inter-module communication in vehicle

    公开(公告)号:US10759533B1

    公开(公告)日:2020-09-01

    申请号:US15997365

    申请日:2018-06-04

    Abstract: Components of a device may transmit signals between one another using piezo electric transducers (PETs). In a basic system, a first PET may be coupled to and/or in contact with a first location on a member. A second PET may be coupled to and/or in contact with a second location on the member and separated from the first PET by a distance. The first PET may receive a signal (e.g., an electrical voltage) and convert the signal to a mechanical force/stress causing vibration of the member. The vibration may propagate through the member to other locations about the member. The second PET receive the vibration and may convert the vibration back to the signal, such as by converting mechanical force/stress to the electrical voltage (i.e., the signal). A similar process may be performed in reverse to enable the first and second PET to provide two-way communication.

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