公开(公告)号：US20240377235A1

公开(公告)日：2024-11-14

申请号：US18783079

申请日：2024-07-24

Applicant: Hifi Engineering Inc.

Inventor： Seyed Ehsan Jalilian ,  Dongliang Huang ,  Henry Leung ,  King Fai Ma

IPC: G01F1/66 ,  G01M3/28 ,  G06N3/0455 ,  G06N3/08 ,  G06N20/00

Abstract: There is provided a method of estimating flowrate in a pipeline based on acoustic behaviour of the pipe. First acoustic data is measured from the pipeline. A flowrate of the fluid in the pipeline is then estimated. The estimation is based on the first acoustic data and based on a correlation established between second acoustic data and corresponding flowrate data from an experimental pipeline. The correlation is established by a machine learning process (which may include the use of an artificial neural network, such as an autoencoder). The second acoustic data and corresponding flowrate data are used as inputs to the machine learning process.

公开(公告)号：US11754462B2

公开(公告)日：2023-09-12

申请号：US17299302

申请日：2019-12-02

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01M3/38 ,  E21B47/117

CPC classification number: G01M3/38 ,  E21B47/117

Abstract: There are described methods, systems, and computer-readable media for detecting events in a conduit. Multiple lengths of optical fiber positioned alongside a conduit are used to detect a signal. For each length of optical fiber, interferometric data is obtained from the detected signal. The interferometric data obtained for one length of optical fiber is compared to the interferometric data obtained for one or more other lengths of optical fiber. Based on the comparison, it is determined whether the signal originated from the conduit.

公开(公告)号：US11609086B2

公开(公告)日：2023-03-21

申请号：US17521052

申请日：2021-11-08

Applicant: Hifi Engineering Inc.

Inventor： Brian H. Moore ,  Walter Jeffrey Shakespeare ,  Phillip William Wallace ,  Viet Hoang ,  Chris Henrikson ,  Ajay Sandhu ,  Adrian Dumitru ,  Thomas Clement ,  Dongliang Huang ,  Seyed Ehsan Jalilian

IPC: G01B11/16 ,  G01D5/353 ,  G01H9/00 ,  G01K11/3206 ,  G01L1/24

Abstract: There is described a method for interrogating optical fiber comprising fiber Bragg gratings (“FBGs”), using an optical fiber interrogator. The method comprises (a) generating an initial light pulse from phase coherent light emitted from a light source, wherein the initial light pulse is generated by modulating the intensity of the light; (b) splitting the initial light pulse into a pair of light pulses; (c) causing one of the light pulses to be delayed relative to the other of the light pulses; (d) transmitting the light pulses along the optical fiber; (e) receiving reflections of the light pulses off the FBGs; and (f) determining whether an optical path length between the FBGs has changed from an interference pattern resulting from the reflections of the light pulses.

公开(公告)号：US11441926B2

公开(公告)日：2022-09-13

申请号：US16961031

申请日：2019-01-08

Applicant: Hifi Engineering Inc.

Inventor： Adekunle Adeyemi ,  Seyed Ehsan Jalilian

IPC: G01L1/24 ,  G01D5/353 ,  G01H9/00 ,  G01K11/3206

Abstract: There is provided a system for determining multiple baselines for detecting events in a conduit. The system comprises an optical fiber interrogator for interrogating optical fiber; and one or more processors communicative with the optical fiber interrogator and memory having stored thereon computer program code configured, when executed by the one or more processors, to cause the one or more processors to perform a method. The method comprises, for each of multiple channels of the conduit, each channel comprising a portion of the conduit: obtaining phase data for the channel, the phase data being obtained by causing the optical fiber interrogator to interrogate optical fiber positioned alongside the conduit; and determining one or more baselines from the phase data. As a result, events in the conduit may be detected with fewer false positives.

公开(公告)号：US20220057193A1

公开(公告)日：2022-02-24

申请号：US17521052

申请日：2021-11-08

Applicant: Hifi Engineering Inc.

Inventor： Brian H. Moore ,  Walter Jeffrey Shakespeare ,  Phillip William Wallace ,  Viet Hoang ,  Chris Henrikson ,  Ajay Sandhu ,  Adrian Dumitru ,  Thomas Clement ,  Dongliang Huang ,  Seyed Ehsan Jalilian

IPC: G01B11/16 ,  G01D5/353 ,  G01H9/00 ,  G01K11/3206 ,  G01L1/24

Abstract: There is described a method for interrogating optical fiber comprising fiber Bragg gratings (“FBGs”), using an optical fiber interrogator. The method comprises (a) generating an initial light pulse from phase coherent light emitted from a light source, wherein the initial light pulse is generated by modulating the intensity of the light; (b) splitting the initial light pulse into a pair of light pulses; (c) causing one of the light pulses to be delayed relative to the other of the light pulses; (d) transmitting the light pulses along the optical fiber; (e) receiving reflections of the light pulses off the FBGs; and (f) determining whether an optical path length between the FBGs has changed from an interference pattern resulting from the reflections of the light pulses.

公开(公告)号：US11243122B2

公开(公告)日：2022-02-08

申请号：US16358066

申请日：2019-03-19

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01K11/32 ,  G01K1/20 ,  G01B11/16 ,  G01H9/00 ,  G01N25/16 ,  G01N21/45

Abstract: Described are methods and systems using optical fiber interferometry to sense interference causing events in a region of interest and differentiate between a strain event and a thermal event. Other methods and systems relate to the use of optical fiber interferometry for determining temperature offset in a region of interest and using the determined temperature offset for determining temperature in the region of interest.

公开(公告)号：US20210247250A1

公开(公告)日：2021-08-12

申请号：US17243142

申请日：2021-04-28

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01L1/24 ,  E21B47/135 ,  G02B6/02 ,  F17D5/00 ,  F17C13/02 ,  E21B47/007

Abstract: A system and method for detecting dynamic strain of a housing. The system includes an optical fiber linearly affixed along a surface of a length of the housing and an interrogator comprising a laser source and a photodetector. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths with a segment of the optical fiber extending between the FBGs. The segment of the optical fiber is linearly affixed along the surface of the housing. The interrogator is configured to perform interferometry by shining laser light along the optical fiber and detecting light reflected by the FBGs. The interrogator outputs dynamic strain measurements based on interferometry performed on the reflected light.

公开(公告)号：US11085758B2

公开(公告)日：2021-08-10

申请号：US16805277

申请日：2020-02-28

Applicant: Hifi Engineering Inc.

Inventor： Seyed Ehsan Jalilian ,  John Hull ,  Daniel Huang ,  Adekunle Adeyemi

IPC: G01B11/16 ,  G01L1/24 ,  G01M3/00 ,  G01M3/24 ,  G01M3/38 ,  G01D5/353 ,  G01K11/3206 ,  G01B21/32 ,  G01H9/00

Abstract: Methods, systems, and techniques for determining whether an event has occurred from dynamic strain measurements involve determining, using a processor, at least one event parameter from a signal representing the dynamic strain measurements, and then having the processor use the at least one event parameter to determine whether the event has occurred. The at least one event parameter is any one or more of a measure of magnitude of the signal, frequency centroid of the signal, filtered baseline of the signal, harmonic power of the signal, and time-integrated spectrum flux of the signal.

公开(公告)号：US20210239516A1

公开(公告)日：2021-08-05

申请号：US17053041

申请日：2019-05-07

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01H9/00 ,  G01L1/24 ,  G02B6/44

Abstract: There is described an optical fiber assembly comprising an optical fiber casing and optical fiber deployed within and fixed relative to the casing at multiple fixation points spaced along the casing. The optical fiber assembly may further comprise one or more weights attached within the casing to the optical fiber, for increasing a tension of the optical fiber between the multiple fixation points. The optical fiber casing may comprise flexible portions and rigid portions, with the optical fiber fixed to the flexible portions.

公开(公告)号：US20200158594A1

公开(公告)日：2020-05-21

申请号：US16625640

申请日：2018-06-29

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian ,  David Westwick

IPC: G01M3/24 ,  G01H9/00

Abstract: Methods, systems, and techniques for determining whether an acoustic event lias occurred along a fluid conduit iliat lias acoustic sensors positioned along its length. For each of the sensors, a processor is used to determine a linear relationship between a measured acoustic signal measured using the sensor and a white noise acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor. From the linear relationship, the processor determines an acoustic path response that includes an acoustic response of the longitudinal segment and an acoustic source transfer function dial transforms the white noise acoustic source. Over time, variations in the acoustic path responses and/or acoustic source transfer functions are monitored. When the event threshold is exceeded, the acoustic event is identified as having occurred along the longitudinal segment corresponding to the acoustic path response or acoustic source transfer function that varied in excess of the event threshold.