公开(公告)号：US20200212956A1

公开(公告)日：2020-07-02

申请号：US15752214

申请日：2016-08-12

Applicant: University of Washington

Inventor： Shyamnath Gollakota ,  Bryce Kellogg ,  Vamsi Talla ,  Joshua R. Smith

IPC: H04B1/713 ,  H04W74/08 ,  H04B7/0413

Abstract: Examples described herein include devices and systems utilizing backscatter communication to directly generate transmissions in accordance with wireless communication protocols that can be decoded existing devices. Examples include devices that generate 802.11b transmissions using backscatter communication. Examples of network stacks are described which may facilitate backscatter devices to coexist with other devices (e.g. in the ISM band), without incurring, or reducing a need for, the power consumption or carrier sense and medium access control operations.

公开(公告)号：US20190289284A1

公开(公告)日：2019-09-19

申请号：US16463105

申请日：2016-11-24

Applicant: University of Washington

Inventor： Joshua R. Smith ,  Samuel R. Browd ,  Rufus Griffin Nicoll ,  James Andrew Youngquist

IPC: H04N13/344 ,  H04N13/243 ,  H04N13/282 ,  H04N13/254

Abstract: Systems and methods for capturing and rendering light fields for head-mounted displays are disclosed. A mediated-reality visualization system includes a head-mounted display assembly comprising a frame configured to be mounted to a user's head and a display device coupled to the frame. An imaging assembly separate and spaced apart :from the head-mounted display assembly is configured to capture light-field data. A computing device in communication with the imaging assembly and the display device is configured to receive light-field data from the imaging assembly and render one or more virtual cameras. Images from the one or more virtual cameras are presented to a user via the display device.

公开(公告)号：US20180241604A1

公开(公告)日：2018-08-23

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: H04L27/26 ,  H04B1/40 ,  H04B7/0413

CPC classification number: H04L27/2649 ,  H04B1/40 ,  H04B7/0413 ,  H04K3/25 ,  H04K2203/20

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：US20130158711A1

公开(公告)日：2013-06-20

申请号：US13663355

申请日：2012-10-29

Applicant: University of Washington through its Center for Commercialization

Inventor： Joshua R. Smith ,  Liang-Ting Jiang

IPC: B25J9/16 ,  G01S1/72

CPC classification number: B25J9/1694 ,  B25J9/1612 ,  B25J9/1697 ,  G01S1/72 ,  G01S11/14 ,  G05B2219/37433 ,  G05B2219/39466 ,  Y10S901/46 ,  Y10S901/47

Abstract: An acoustic pretouch sensor or proximity sensor (110) includes a cavity (104) with a first microphone (106) disposed therein, and optionally a second microphone (108) disposed outside of the cavity. A processing system (110) receives the signals generated by the first microphone and analyzes the spectrum to produce a result representing the resonant frequency of the cavity. The processing system may optionally subtract the second microphone signal spectrum from the first to automatically compensate for changes in ambient noise. The processing system uses the resonant frequency to estimate the distance from the cavity opening to a surface (90). For example, the pretouch sensors may be incorporated into a stand alone device (100), into a robotic end effector (204), or into a device such as a phone (300).

Abstract translation: 声学前置传感器或接近传感器（110）包括具有设置在其中的第一麦克风（106）的空腔（104），以及可选地设置在空腔外部的第二麦克风（108）。 处理系统（110）接收由第一麦克风产生的信号并分析频谱以产生表示空腔谐振频率的结果。 处理系统可以可选地从第一麦克风信号频谱中减去第二麦克风信号频谱以自动补偿环境噪声的变化。 处理系统使用谐振频率来估计从腔体开口到表面的距离（90）。 例如，前置传感器可以并入到独立设备（100）中，并入到机器人端部执行器（204）中，或者被并入到诸如电话（300）的设备中。