公开(公告)号：US20250012619A1

公开(公告)日：2025-01-09

申请号：US18763337

申请日：2024-07-03

Applicant: University of Washington

Inventor： Joshua R. Smith ,  Jared Nakahara

IPC: G01G5/00 ,  G01G23/01 ,  G01G23/06 ,  G01N29/22

Abstract: Acoustic balances configured for weighing in ultrasonic non-contact manipulators, and associated systems and methods are described. In one embodiment, a method for a non-contact acoustic determination of a mass of an object includes capturing the object within an acoustic trap of an acoustic balance. The method also includes, in response to changing at least one acoustic parameter of the acoustic balance, changing an equilibrium position of the object; and in response to changing the equilibrium position of the object, causing the object to oscillate. The method also includes determining a resonant frequency of oscillation of the object; and based on the resonant frequency of oscillation of the object, determining the mass of the object.

公开(公告)号：US11722017B2

公开(公告)日：2023-08-08

申请号：US17376861

申请日：2021-07-15

Applicant: University of Washington through its Center for Commercialization

Inventor： Joshua R. Smith ,  Benjamin H. Waters ,  Scott Wisdom ,  Alanson P. Sample

IPC: H02J50/90 ,  H02J50/12 ,  H03H7/40 ,  A61M60/216 ,  A61M60/873 ,  A61M60/523 ,  A61M60/538 ,  A61M60/178 ,  A61M60/148

CPC classification number: H02J50/90 ,  A61M60/178 ,  A61M60/216 ,  A61M60/523 ,  A61M60/538 ,  A61M60/873 ,  H02J50/12 ,  A61M60/148 ,  A61M2205/04 ,  A61M2205/3515 ,  A61M2205/3523 ,  A61M2205/3561 ,  A61M2205/8243 ,  H03H7/40

Abstract: An adaptive system for efficient and long-range wireless power delivery using magnetically coupled resonators responds to changes in a dynamic environment, and maintains high efficiency over a narrow or fixed frequency range. The system uses adaptive impedance matching to maintain high efficiency. The wireless power transfer system includes a drive inductor coupled to a high-Q transmitter coil, and a load inductor coupled to a high-Q receiver coil. The transmitter coil and receiver coil for a magnetically coupled resonator. A first matching network is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.

公开(公告)号：US11090481B2

公开(公告)日：2021-08-17

申请号：US16358528

申请日：2019-03-19

Applicant: University of Washington through its Center for Commercialization

Inventor： Joshua R. Smith ,  Benjamin H. Waters ,  Scott Wisdom ,  Alanson P. Sample

IPC: H02J50/12 ,  H02J50/90 ,  H02J7/02 ,  A61M60/871 ,  A61M60/50 ,  H03H7/40 ,  A61M60/148 ,  A61M60/205

Abstract: An adaptive system for efficient and long-range wireless power delivery using magnetically coupled resonators responds to changes in a dynamic environment, and maintains high efficiency over a narrow or fixed frequency range. The system uses adaptive impedance matching to maintain high efficiency. The wireless power transfer system includes a drive inductor coupled to a high-Q transmitter coil, and a load inductor coupled to a high-Q receiver coil. The transmitter coil and receiver coil for a magnetically coupled resonator. A first matching network is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.

公开(公告)号：US10382161B2

公开(公告)日：2019-08-13

申请号：US15118443

申请日：2015-02-11

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  David Wetherall ,  Bryce Kellogg ,  Aaron N. Parks

IPC: H04B1/04 ,  H04L1/00 ,  H02J50/00 ,  H02J3/38 ,  H04W4/70 ,  H04W84/12

Abstract: Example devices described herein include endpoint devices which may communicate with an access point device by modulating a channel associated with the wireless communication to encode transmit data. The channel modulation may be performed by utilizing a switch to control an impedance of an antenna at the endpoint device to either reflect or absorb wireless network communication signals received by the endpoint device. The access point device may extract the transmit data by decoding changes in the channel caused, at least in part, by the modulation. Access point devices may transmit a pattern of packets—the presence or absence of which may correspond with transmit data. Endpoint devices may decode this data by using an energy detector to differentiate between the presence or absence of a packet.

公开(公告)号：US10187241B2

公开(公告)日：2019-01-22

申请号：US15958880

申请日：2018-04-20

Applicant: UNIVERSITY OF WASHINGTON

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  Aaron N. Parks ,  Angli Liu

IPC: H04L1/02 ,  H04L27/26 ,  H04K3/00 ,  H04B1/40 ,  H04B7/0413

Abstract: Apparatuses, systems, ambient RF backscatter transceivers, and methods for communicating using MIMO and spread spectrum coding of backscattered ambient RF signals are described. An example system may include an ambient RF backscatter transceiver that include an antenna configured to receive a backscattered ambient radio frequency (RF) signal, and a receiver coupled to the antenna. The receiver may be configured to demodulate the backscattered ambient RF signal using one of multiple input, multiple output multiplexing demodulation or spread spectrum code demodulation to retrieve the first data. The backscattered ambient RF signal may be generated by backscattering an ambient RF signal at a first frequency. The ambient RF signal may be configured to provide other data at a second frequency.

公开(公告)号：US10033424B2

公开(公告)日：2018-07-24

申请号：US15601836

申请日：2017-05-22

Applicant: University of Washington

Inventor： Shyamnath Gollakota ,  Joshua R. Smith ,  Vincent Liu ,  Aaron N. Parks ,  Vamsi Talla

IPC: H04B1/38 ,  H04L27/14 ,  H04B1/40

CPC classification number: H04B1/40

Abstract: Apparatuses, systems, ambient backscatter transceivers, and methods for modulating a backscatter of an ambient RF signal are described. An example system may include an ambient backscatter transceiver comprising an antenna that is configured to receive a backscattered ambient radio frequency (RF) signal. The ambient backscatter transceiver is configured to demodulate the backscattered ambient RF signal to retrieve first data. The backscattered ambient RF signal is generated by backscattering an ambient RF signal at a first frequency. The ambient RF signal is encoded with modulated to provide second data at a second frequency.

公开(公告)号：US20170317529A1

公开(公告)日：2017-11-02

申请号：US15503711

申请日：2015-07-30

Applicant: University of Washington

Inventor： Joshua R. Smith ,  Benjamin Waters

IPC: H02J50/10 ,  H04B5/00 ,  H02J50/80

CPC classification number: H02J50/10 ,  H02J7/025 ,  H02J50/12 ,  H02J50/80 ,  H04B5/0037

Abstract: A wireless power transfer system (100) includes a transmitter (110) configured to transmit power to a receiver (120), for example, through coupled resonators (111,121). The transmitter receives feedback from the receiver, and uses the feedback to control the power transmission, to control a parameter at the receiver, for example, a rectified voltage output by the receiver. The feedback to the transmitter may be provided, for example, by an out-of-band radio system (117, 126) between the transmitter and receiver, by a reflection coefficient at the transmitter (116), and/or by an encoded modulation of power in the receiver, for example, in an impedance matching module (121). The transmitter may control the transmitted power, for example, by controlling a transmitter signal generator voltage (VSIG), a transmitter gate driver voltage (VGD), a transmitter amplifier voltage (VpA), and/or an impedance setting in a transmitter impedance matching module (111).

公开(公告)号：US20160301257A1

公开(公告)日：2016-10-13

申请号：US15093459

申请日：2016-04-07

Applicant: UNIVERSITY OF WASHINGTON

Inventor： AARON N. PARKS ,  Joshua R. Smith

IPC: H02J50/20 ,  H04B1/16

CPC classification number: H02J50/20

Abstract: Examples described herein include systems and methods for multiband harvesting. An example system may include a single wideband antenna followed by several narrowband rectifier chains. Each rectifier chain may include a bandpass filter, a tuned impedance matching network, and a rectifier. The outputs of the rectifiers may be combined using a summation network. The summation network, which may be a diode summation network, may in some examples provide good performance even when only a subset o the narrowband harvesters (e.g. a subset of the rectifier chains) is excited.

Abstract translation: 本文描述的实例包括用于多带收获的系统和方法。 示例系统可以包括单个宽带天线，后面是几个窄带整流器链。 每个整流器链可以包括带通滤波器，调谐阻抗匹配网络和整流器。 整流器的输出可以使用求和网络进行组合。 即使在仅窄带收集器（例如，整流器链的子集）上的子集被激发时，可以在二极管求和网络中的求和网络在一些示例中提供良好的性能。

公开(公告)号：US20150280444A1

公开(公告)日：2015-10-01

申请号：US14402660

申请日：2013-05-21

Applicant: University of Washington through its Center for Commercialization

Inventor： Joshua R. Smith ,  Benjamin H. Waters ,  Scott Wisdom ,  Alanson P. Sample

IPC: H02J5/00

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02J17/00 ,  H02J50/90

Abstract: An adaptive system for efficient and long-range wireless power delivery using magnetically coupled resonators responds to changes in a dynamic environment, and maintains high efficiency over a narrow or fixed frequency range. The system uses adaptive impedance matching to maintain high efficiency. The wireless power transfer system includes a drive inductor coupled to a high-Q transmitter coil, and a load inductor coupled to a high-Q receiver coil. The transmitter coil and receiver coil for a magnetically coupled resonator. A first matching network is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.

Abstract translation: 使用磁耦合谐振器的高效和长距离无线功率传输的自适应系统响应动态环境的变化，并且在窄或固定频率范围内保持高效率。 该系统采用自适应阻抗匹配来保持高效率。 无线功率传输系统包括耦合到高Q发射器线圈的驱动电感器和耦合到高Q接收器线圈的负载电感器。 用于磁耦合谐振器的发射器线圈和接收器线圈。 第一匹配网络是（i）可操作地耦合到驱动电感器并且被配置为选择性地调节驱动电感器和发射器线圈之间的阻抗，或者（ii）可操作地耦合到负载电感器，并且被配置为选择性地调节 负载电感和接收线圈。

公开(公告)号：US20130310630A1

公开(公告)日：2013-11-21

申请号：US13843884

申请日：2013-03-15

Applicant: University of Washington through its Center for Commercialization

Inventor： Joshua R. Smith ,  Pramod Bonde ,  Benjamin H. Waters ,  Alanson P. Sample

IPC: A61M1/12 ,  A61M1/10

CPC classification number: A61M1/127 ,  A61M1/101 ,  A61M1/1086 ,  A61M1/122 ,  A61M2205/04 ,  A61M2205/3515 ,  A61M2205/3523 ,  A61M2205/3561 ,  A61M2205/8243 ,  H03H7/40

Abstract: A ventricular assist device (VAD) system includes one or more external subsystems including an amplifier energizing a drive loop with alternating current, and a Tx resonator inductively coupled to the drive loop. An implanted subsystem includes a VAD, an Rx resonator that forms a magnetically coupled resonator with the Tx resonator, and a load loop for providing power to the VAD that is inductively coupled to the Rx resonator. A sensor monitors the drive loop and a controller uses the sensor data to adjust a system parameter to optimize energy transfer performance. Distributing a plurality of the external subsystems throughout a defined space provides a patient with freedom of movement within the defined space.

Abstract translation: 心室辅助装置（VAD）系统包括一个或多个外部子系统，包括用交流电驱动驱动环路的放大器，和感应耦合到驱动环路的Tx谐振器。 植入的子系统包括VAD，形成与Tx谐振器的磁耦合谐振器的Rx谐振器，以及用于向感应耦合到Rx谐振器的VAD提供功率的负载环路。 传感器监控驱动环路，控制器使用传感器数据来调整系统参数以优化能量传输性能。 在整个定义的空间内分布多个外部子系统为患者提供在所定义空间内的移动自由度。