System and methods for multiple-place swarm foraging with dynamic depots

    公开(公告)号:US10850395B2

    公开(公告)日:2020-12-01

    申请号:US15985213

    申请日:2018-05-21

    Applicant: STC.UNM

    Abstract: Teams of robots can be organized to collectively complete complex real-world tasks, for example collective foraging in which robots search for, pick up, and drop off targets in a collection zone. A dynamic multiple-place foraging algorithm (MPFAdynamic) is a scalable, flexible, and efficient algorithm for robot swarms to collect objects in unmapped environments. It achieves scalability through a decentralized architecture in which robots search without central control, and then return to mobile depots which provide collection and communication points. Mobile depots move closer to clusters of targets as robots discover them, which reduces robot transport time as well as collisions among robots. Flexibility is achieved by incorporating individual robot behaviors in which robots move and communicate in ways that mimic the foraging behaviors of ants. The MPFAdynamic algorithm demonstrates that dispersed agents that dynamically adapt to local information in their environment provide more flexible and scalable swarms.

    Resonance avalanche photodiodes for dynamic biasing

    公开(公告)号:US10777698B2

    公开(公告)日:2020-09-15

    申请号:US16160272

    申请日:2018-10-15

    Applicant: STC.UNM

    Abstract: Systems and methods implementing a resonance circuit, including an avalanche photodiode, in which a resonance frequency of the resonance circuit is matched with the frequency of a dynamic biasing signal of the avalanche photodiode, can be used in a variety of applications. In various embodiments, a method for blocking and/or compensating current injection associated with the parasitic capacitance of APDs operated under dynamic biasing may be substantially realized by the matching of the resonance frequency of a resonance circuit including the avalanche photodiode with the frequency of an applied dynamic biasing signal. Additional systems and methods are described that can be used in a variety of applications.

    SYSTEMS AND METHODS FOR MEASURING ABSORPTION COEFFICIENTS OF DOPED OPTICAL FIBERS

    公开(公告)号:US20200033261A1

    公开(公告)日:2020-01-30

    申请号:US16522449

    申请日:2019-07-25

    Applicant: STC.UNM

    Abstract: A system for measuring an absorption coefficient of a doped optical fiber may include: a laser source configured to transmit laser light at a selectable wavelength; a single-mode optical fiber including an end configured to splice to the doped optical fiber; two or more multimode fibers at a side of the doped optical fiber, spaced apart along the side of the doped optical fiber, configured to collect spontaneous emissions from the side of the doped optical fiber; and/or a photodiode or power meter connected to the two or more multimode fibers. A method for measuring an absorption coefficient of a doped optical fiber may include: collecting, from a side of the doped optical fiber, an emission spectrum using two or more multimode fibers; and/or calculating the absorption coefficient form using the emission spectrum and McCumber theory.

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