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Distributed acoustic sensing system with propagation direction and related methods
US2023296425A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023296425-A1 |
| Application number | US-202217655608-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 21, 2022 |
| Priority date | Mar 21, 2022 |
| Publication date | Sep 21, 2023 |
| Grant date | — |
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Abstract
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A DAS system may include an OTDR, and acoustic-sensing optical fibers coupled to the OTDR. The acoustic-sensing optical fibers may have known relative positions within an acoustic wave transmitting medium. The DAS system may also include a processor cooperating with the OTDR to determine a propagation direction of an acoustic wave from an acoustic event in the acoustic wave transmitting medium based upon the known relative positions of the acoustic-sensing optical fibers.
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1 . A distributed acoustic sensing (DAS) system comprising: an optical time domain reflectometer (OTDR); a plurality of acoustic-sensing optical fibers coupled to the OTDR, the plurality of acoustic-sensing optical fibers having known relative positions within an acoustic wave transmitting medium; and a processor cooperating with the OTDR to determine a propagation direction of an acoustic wave from an acoustic event in the acoustic wave transmitting medium based upon the known relative positions of the plurality of acoustic-sensing optical fibers. 2 . The DAS system of claim 1 comprising an optical coupler between the OTDR and the plurality of acoustic-sensing optical fibers. 3 . The DAS system of claim 2 wherein the optical coupler comprises an optical switch. 4 . The DAS system of claim 3 wherein the processor is configured to detect the acoustic event via a given acoustic-sensing optical fiber, and cause the optical switch to switch from the given acoustic-sensing optical fiber to another acoustic-sensing optical fiber. 5 . The DAS system of claim 3 wherein the processor is configured to operate the optical switch to sequentially couple the OTDR to the plurality of acoustic-sensing optical fibers. 6 . The DAS system of claim 2 wherein the optical coupler comprises a fixed optical coupler. 7 . The DAS system of claim 1 wherein the OTDR comprises an optical source configured to inject a sensing optical signal into a coupled acoustic-sensing optical fiber, and an optical detector configured to receive a return optical signal from the coupled acoustic-sensing optical fiber. 8 . The DAS system of claim 1 wherein the plurality of acoustic-sensing optical fibers are arranged in a diverging pattern. 9 . The DAS system of claim 1 wherein the acoustic wave transmitting medium comprises ground. 10 . The DAS system of claim 1 wherein each of the plurality of acoustic-sensing optical fibers has a length greater than 10 km. 11 . A distributed acoustic sensing (DAS) device comprising: an optical time domain reflectometer (OTDR) to be coupled to a plurality of acoustic-sensing optical fibers having known relative positions within an acoustic wave transmitting medium; and a processor configured to determine a propagation direction of an acoustic wave from an acoustic event in the acoustic wave transmitting medium based upon the known relative positions of the plurality of acoustic-sensing optical fibers. 12 . The DAS device of claim 11 comprising an optical coupler between the OTDR and the plurality of acoustic-sensing optical fibers. 13 . The DAS device of claim 12 wherein the optical coupler comprises an optical switch. 14 . The DAS device of claim 13 wherein the processor is configured to detect the acoustic event via a given acoustic-sensing optical fiber, and cause the optical switch to switch from the given acoustic-sensing optical fiber to another acoustic-sensing optical fiber. 15 . The DAS device of claim 13 wherein the processor is configured to operate the optical switch to sequentially couple the OTDR to the plurality of acoustic-sensing optical fibers. 16 . The DAS device of claim 12 wherein the optical coupler comprises a fixed optical coupler. 17 . The DAS device of claim 11 wherein the OTDR comprises an optical source configured to inject a sensing optical signal into a coupled acoustic-sensing optical fiber, and an optical detector configured to receive a return optical signal from the coupled acoustic-sensing optical fiber. 18 . A method of distributed acoustic sensing (DAS) device using a plurality of acoustic-sensing optical fibers having known relative positions within an acoustic wave transmitting medium, the method comprising: operating an optical time domain reflectometer (OTDR) in cooperation with a processor to determine a propagation direction of an acoustic wave from an acoustic event in the acoustic wave transmitting medium based upon the known relative positions of the plurality of acoustic-sensing optical fibers. 19 . The method of claim 18 comprising detecting the acoustic event via a given acoustic-sensing optical fiber, and causing an optical switch to switch from the given acoustic-sensing optical fiber to another acoustic-sensing optical fiber. 20 . The method of claim 19 comprising operating the optical switch to sequentially couple the OTDR to the plurality of acoustic-sensing optical fibers.
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- What does patent US2023296425A1 cover?
- A DAS system may include an OTDR, and acoustic-sensing optical fibers coupled to the OTDR. The acoustic-sensing optical fibers may have known relative positions within an acoustic wave transmitting medium. The DAS system may also include a processor cooperating with the OTDR to determine a propagation direction of an acoustic wave from an acoustic event in the acoustic wave transmitting medium …
- Who is the assignee on this patent?
- Eagle Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification G01H9/004. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Sep 21 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).