公开(公告)号：US12203895B2

公开(公告)日：2025-01-21

申请号：US17603685

申请日：2020-04-20

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Boon Siew Ooi ,  Islam Ashry ,  Yuan Mao

IPC: G01N29/24 ,  G01D5/353 ,  G01H9/00 ,  G01N29/14 ,  G01N29/48 ,  G01N33/00 ,  H04B10/071

Abstract: A method for determining tree infestation includes placing an optical fiber around a trunk of a tree; recording with a distributed acoustic sensor (DAS) box a Rayleigh signal reflected from the tree, along the optical fiber; processing the Rayleigh signal to obtain a processed signal; calculating a signal-to-noise ratio (SNR) of the processed signal for the tree; and comparing the SNR to a threshold value and counting an alarm if the SNR is larger than the threshold value. The SNR is defined as a ratio between (1) a maximum value of a processed signal and (2) a minimum value of the processed signal.

公开(公告)号：US11956016B2

公开(公告)日：2024-04-09

申请号：US17914039

申请日：2021-03-08

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Boon Siew Ooi ,  Islam Ashry ,  Yuan Mao

IPC: H04B10/00 ,  G02B6/02 ,  H04B10/2581 ,  H04J14/00

CPC classification number: H04B10/2581 ,  G02B6/02042

Abstract: A hybrid sensing-communication system includes a multicore optical fiber that includes first and second cores, a first communication device optically coupled to a first end of the first core of the multicore optical fiber, a second communication device optically coupled to a second end of the first core of the multicore optical fiber, a first sensing device optically coupled to a first end of the second core of the multicore optical fiber, and a second sensing device optically coupled to a second end of the second core of the multicore optical fiber. The first and second communication devices exclusively exchange communication data along the first core, the first and second sensing devices exclusively exchange sensing data along the second core, and the communication data is different from the sensing data.

公开(公告)号：US11754532B2

公开(公告)日：2023-09-12

申请号：US17050116

申请日：2019-04-24

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Boon Siew Ooi ,  Yuan Mao ,  Islam Ashry

IPC: G01N29/46 ,  G01N29/24 ,  G01H9/00 ,  G01N29/44 ,  G01N33/00 ,  A01M99/00 ,  G01N33/46

CPC classification number: G01N29/2418 ,  G01H9/004 ,  G01N29/4454 ,  G01N29/46 ,  G01N33/0098 ,  A01M99/00 ,  G01N33/46 ,  G01N2291/0238

Abstract: An optical fiber distributed acoustic sensor (DAS) system for detecting a red palm weevil and/or its larvae inside a tree. The system includes an optical fiber that is configured to be placed next to a tree; and a DAS box optically connected to the optical fiber and configured to receive a reflected light from the optical fiber. The DAS box includes electronics that extracts from the reflected light a frequency in a range of [400 Hz, 4 kHz], and sends a message indicating a presence of the red palm weevil and/or its larvae inside the tree.