Invention Grant
- Patent Title: Method and apparatus for detecting a disturbance in a medium based on shifted filtered phase information for a plurality of locations
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Application No.: US17301516Application Date: 2021-04-05
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Publication No.: US11438059B2Publication Date: 2022-09-06
- Inventor: Andrew Lewis , Stuart Russell
- Applicant: AT&T Intellectual Property II, L.P.
- Applicant Address: US GA Atlanta
- Assignee: AT&T Intellectual Property II, L.P.
- Current Assignee: AT&T Intellectual Property II, L.P.
- Current Assignee Address: US GA Atlanta
- Priority: GB0620258 20061013
- Main IPC: H04B10/071
- IPC: H04B10/071 ; G01M11/00 ; G01D5/353 ; G01H9/00

Abstract:
An improved technique for acoustic sensing involves, in one embodiment, launching into a medium, a plurality of groups of pulse-modulated electromagnetic-waves. The frequency of electromagnetic waves in a pulse within a group differs from the frequency of the electromagnetic waves in another pulse within the group. The energy scattered by the medium is detected and, in one embodiment, the beat signal may be used to determine a characteristic of the environment of the medium. For example, if the medium is a buried optical fiber into which light pulses have been launched in accordance with the invention, the presence of acoustic waves within the region of the buried fiber can be detected.
Public/Granted literature
- US20210226698A1 METHOD AND APPARATUS FOR DETECTING A DISTURBANCE IN A MEDIUM Public/Granted day:2021-07-22
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