公开(公告)号：US12196635B2

公开(公告)日：2025-01-14

申请号：US18188967

申请日：2023-03-23

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

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

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：US20240011594A1

公开(公告)日：2024-01-11

申请号：US18054496

申请日：2022-11-10

Applicant: HIFI ENGINEERING INC.

Inventor： Seyed Ehsan JALILIAN ,  Mehri OWJIMEHR

IPC: F16L55/48 ,  G01S11/14 ,  G01H9/00

CPC classification number: F16L55/48 ,  G01S11/14 ,  G01H9/004

Abstract: An object moving along a conduit having multiple channels is tracked. Each channel defines a portion of a length of the conduit. For each channel, acoustic data, generated from one or more acoustic signals detected at the channel in response to movement of the object along the conduit, is generated. For at least one channel, the acoustic data obtained for the at least one channel is cross-correlated with the acoustic data obtained for at least one other one of the channels. Based on the cross-correlating, a position of the object within the conduit is determined.

公开(公告)号：US11662489B2

公开(公告)日：2023-05-30

申请号：US16607924

申请日：2018-04-25

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01V1/18 ,  G01H9/00 ,  G01V1/40 ,  G01V1/20 ,  H05K1/02

CPC classification number: G01V1/18 ,  G01H9/004 ,  G01V1/20 ,  G01V1/40 ,  H05K1/0274

Abstract: There is described a method of making an acoustic sensor having a frequency response approximating a desired frequency response. The method comprises wrapping optical fiber around a core according to a wrapping pattern. The wrapping pattern is determined from an impulse response of the acoustic sensor. The impulse response is determined from the desired frequency response of the acoustic sensor.

公开(公告)号：US20210164812A1

公开(公告)日：2021-06-03

申请号：US16961031

申请日：2019-01-08

Applicant: Hifi Engineering Inc.

Inventor： Adekunle Adeyemi ,  Seyed Ehsan Jalilian

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

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.

公开(公告)号：US20200249107A1

公开(公告)日：2020-08-06

申请号：US16679050

申请日：2019-11-08

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01L1/24 ,  G01D5/353

Abstract: A device and system for detecting dynamic strain. The device comprises a longitudinally extending carrier and an optical fiber embedded along an outer surface of a length of the carrier. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths. The system comprises the device and an interrogator comprising a laser source and a photodetector. 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：US20200096658A1

公开(公告)日：2020-03-26

申请号：US16607924

申请日：2018-04-25

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01V1/18 ,  G01H9/00 ,  G01V1/40

Abstract: There is described a method of making an acoustic sensor having a frequency response approximating a desired frequency response. The method comprises wrapping optical fiber around a core according to a wrapping pattern. The wrapping pattern is determined from an impulse response of the acoustic sensor. The impulse response is determined from the desired frequency response of the acoustic sensor.

公开(公告)号：US20200057220A1

公开(公告)日：2020-02-20

申请号：US16485917

申请日：2018-02-09

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Neil Gulewicz ,  Robert Sokolowski ,  Alex Pletnyov ,  Souheil Merhi ,  Philip Cheuk ,  Seyed Ehsan Jalilian

IPC: G02B6/44

Abstract: There are described methods and systems for deploying optical fiber within a conduit. In one aspect, an optical fiber injector comprising a pressure vessel having a fluid inlet and a fluid outlet. The fluid outlet is engaged with an open end of the conduit. A length of optical fiber is provided within the pressure vessel. The optical fiber is then jetted into the conduit by injecting a fluid into the pressure vessel via the fluid inlet. The optical fiber injector is configured such that the fluid is directed from the fluid inlet to the fluid outlet, and urges the optical fiber to move through the conduit, thereby deploying the optical fiber within the conduit. In a further aspect, there is provided a modular assembly comprising a pipeline and a line of two or more conduits arranged end-to-end. Each pair of opposing ends of adjacent conduits is connected together by a separate splice box. The line is positioned along and adjacent to a length of the pipeline.

公开(公告)号：US20190331513A1

公开(公告)日：2019-10-31

申请号：US16310375

申请日：2017-06-14

Applicant: Hifi Engineering Inc.

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

IPC: G01F1/66 ,  G01M3/28 ,  G06N3/08

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：US10416005B2

公开(公告)日：2019-09-17

申请号：US15532963

申请日：2015-12-04

Applicant: Hifi Engineering Inc.

Inventor： Brian H. Moore ,  Walter Jeffrey Shakespeare ,  Phillip William Wallace ,  Viet Hoang ,  Tom Clement

IPC: G01B9/02 ,  G01B11/16 ,  G01D18/00 ,  G01D5/353

Abstract: An optical fiber interrogator for interrogating optical fiber that includes fiber Bragg gratings (“FBGs”). The interrogator includes a light source operable to emit phase coherent light, amplitude modulation circuitry optically coupled to the light source and operable to generate pulses from the light, and control circuitry communicatively coupled to the amplitude modulation circuitry that is configured to perform a method for interrogating the optical fiber. The method includes generating a pair of light pulses by using the amplitude modulation circuitry to modulate light output by the light source without splitting the light.

公开(公告)号：US10281341B2

公开(公告)日：2019-05-07

申请号：US15575981

申请日：2016-05-19

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

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

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.