公开(公告)号：US11159059B2

公开(公告)日：2021-10-26

申请号：US16691202

申请日：2019-11-21

Applicant: University of Washington

Inventor： Shyamnath Gollakota ,  Vikram Subramaniam Iyer ,  Arka Majumdar ,  Elyas Bayati ,  Rajalakshmi Nandakumar

IPC: H02J50/30 ,  H02J50/80 ,  H02J50/90 ,  H01L35/02 ,  H02J7/02

Abstract: Systems and methods for wirelessly transmitting power across a room or space are disclosed herein. One such system is comprised of a power receiving element positioned to receive wireless power transfer, comprised of a power receiving cell and a retroreflector positioned proximate the power receiving cell, and a power transmission element configured to wirelessly transmit power towards the power receiving element. The power transmission element includes an optical power transmitter configured to emit a first laser beam with a first power density towards the receiving cell, a guard beam emitter positioned proximate the optical power transmitter and configured to emit a second laser beam with a second power density towards the retroreflectors, a light detector positioned proximate the guard beam emitter and configured to detect light reflected by the retroreflectors, and an interlock system configured to interrupt power transmission when a decrease in light incident from the retroreflectors is detected.

公开(公告)号：US20200161904A1

公开(公告)日：2020-05-21

申请号：US16691202

申请日：2019-11-21

Applicant: University of Washington

Inventor： Shyamnath Gollakota ,  Vikram Subramaniam Iyer ,  Arka Majumdar ,  Elyas Bayati ,  Rajalakshmi Nandakumar

IPC: H02J50/30 ,  H02J50/80 ,  H02J50/90

Abstract: Systems and methods for wirelessly transmitting power across a room or space are disclosed herein. One such system is comprised of a power receiving element positioned to receive wireless power transfer, comprised of a power receiving cell and a retroreflector positioned proximate the power receiving cell, and a power transmission element configured to wirelessly transmit power towards the power receiving element. The power transmission element includes an optical power transmitter configured to emit a first laser beam with a first power density towards the receiving cell, a guard beam emitter positioned proximate the optical power transmitter and configured to emit a second laser beam with a second power density towards the retroreflectors, a light detector positioned proximate the guard beam emitter and configured to detect light reflected by the retroreflectors, and an interlock system configured to interrupt power transmission when a decrease in light incident from the retroreflectors is detected.