Delivery drop rate modulation
    31.
    发明授权

    公开(公告)号:US10858103B1

    公开(公告)日:2020-12-08

    申请号:US16101311

    申请日:2018-08-10

    Abstract: An unmanned aerial vehicle (UAV) can deliver a package to a delivery destination. Packages delivered by a UAV may be lowered towards the ground while the UAV continues to fly rather than the UAV landing on the ground and releasing the package. Packages may sway during lowering as a result of wind or movement of the UAV. By modulating a rate of descent of a package, a package sway may mitigated. The lowering mechanism includes wrapping a tether in various directions around the package such that the package rotates in a first and second direction as the package descends. Additionally, a rip-strip lowering mechanism that separates under tension to lower the package and a rappel mechanism that slides the package down a tether may be used. Accordingly, the tether can control a descent of the package assembly.

    Camera calibration in a mobile environment

    公开(公告)号:US10853942B1

    公开(公告)日:2020-12-01

    申请号:US15249821

    申请日:2016-08-29

    Abstract: Camera calibration may be performed in a mobile environment. One or more cameras can be mounted on a mobile vehicle, such as an unmanned aerial vehicle (UAV) or an automobile. Because of the mobility of the vehicle the one or more cameras may be subjected to inaccuracy in imagery caused by various factors, such as environmental factors (e.g., airflow, wind, etc.), impact by other objects (e.g., debris, vehicles, etc.), vehicle vibrations, and the like. To reduce the inaccuracy in imagery, the mobile vehicle can include a mobile camera calibration system configured to calibrate the one or more cameras while the mobile vehicle is traveling along a path. The mobile camera calibration system can cause the one or more cameras to capture an image of an imaging target while moving, and calibrate the one or more cameras based on a comparison between the image and imaging target data.

    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.

    Sensors embedded within aerial vehicle control surfaces

    公开(公告)号:US10279927B1

    公开(公告)日:2019-05-07

    申请号:US15830279

    申请日:2017-12-04

    Abstract: Aerial vehicles may include one or more directional sensors embedded into wings, rudders, ailerons, flaps or other control surfaces. When the aerial vehicles are operating in modes that do not require the use of such surfaces, a surface having a directional sensor embedded therein may be repositioned or reoriented to align the directional sensor toward an area or axis of interest, and information may be gathered from the area or axis of interest using the directional sensor. One or more safety lights, running lights or other illuminators may cast light of a desired color, frequency or wavelength toward the area or axis of interest. The directional sensors may include cameras, radar or laser sensors, or any other reorientable sensors.

    Audio canceling of audio generated from nearby aerial vehicles

    公开(公告)号:US10176792B1

    公开(公告)日:2019-01-08

    申请号:US14829027

    申请日:2015-08-18

    Abstract: The implementations described include an audio canceling device that receives an unmanned aerial vehicle (“UAV”) audio signature representative of audio generated by an unmanned aerial vehicle, monitors audio within an environment in which the audio canceling device is located for audio generated by the UAV, generates an attenuation-signal based on detected audio generated by the UAV, and outputs the attenuation-signal to attenuate the audio generated by the UAV. In one example, the audio canceling device may be used to attenuate audio generated by a UAV that is permeating into a user's home during delivery of an item to the user's home by the UAV.

    Airframe-embedded ultrasonic transducers

    公开(公告)号:US10101443B1

    公开(公告)日:2018-10-16

    申请号:US15368532

    申请日:2016-12-02

    Abstract: Aerial vehicles may be outfitted with one or more ultrasonic anemometers, each having ultrasonic transducers embedded into external surfaces. The transducers may be aligned and configured to transmit acoustic signals to one another, and receive acoustic signals from one another, along one or more paths or axes. Elapsed times of signals transmitted and received by pairs of transducers may be used to determine air speeds along the paths or axes. Where two or more pairs of transducers are provided, a net vector may be derived based on air speeds determined along the paths or axes between the pairs of the transducers, and used to generate control signals for maintaining the aerial vehicle on a desired course, at a desired speed or altitude, or in a desired orientation. The transducers may be dedicated for use in an anemometer, or may serve multiple purposes, and may be reoriented or reconfigured as necessary.

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