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公开(公告)号：US20220065669A1
公开(公告)日：2022-03-03
申请号：US17298942
申请日：2019-12-02
Applicant: Hifi Engineering Inc.
Inventor： Arne Dankers , Seyed Ehsan Jalilian
Abstract: There are described methods, systems, and computer-readable media for detecting events in a conduit. A first length of optical fiber, positioned alongside the conduit, is interrogated to obtain interferometric data from the first length of optical fiber. A second length of optical fiber, positioned alongside the conduit, is interrogated to obtain interferometric data from the second length of optical fiber. The interferometric data obtained from the first length of optical fiber is compared with the interferometric data obtained with the second length of optical fiber. Based on the comparison, whether an event has occurred in the conduit is determined.
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公开(公告)号：US11054288B2
公开(公告)日：2021-07-06
申请号：US16523864
申请日：2019-07-26
Applicant: Hifi Engineering Inc.
Inventor： Brian H. Moore , Walter Jeffrey Shakespeare , Phillip William Wallace , Viet Hoang , Tom Clement
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.
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公开(公告)号：US11002620B2
公开(公告)日：2021-05-11
申请号：US16679050
申请日：2019-11-08
Applicant: Hifi Engineering Inc.
Inventor： John Hull , Seyed Ehsan Jalilian
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.
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公开(公告)号：US20210033485A1
公开(公告)日：2021-02-04
申请号：US17046539
申请日：2019-04-04
Applicant: Hifi Engineering Inc.
Inventor： Arne Dankers , Seyed Ehsan Jalilian
IPC: G01M3/24 , G01D5/353 , E21B47/107 , E21B47/117
Abstract: There is described a method of locating an area of interest in a conduit, comprising: measuring multiple acoustic signals at multiple locations along the conduit; for each acoustic signal, determining its autocorrelation; and applying a relationship to the determined autocorrelations to estimate a location of the area of interest, wherein the relationship is between autocorrelations of acoustic signals measured in a modelled conduit and modelled areas of interest in the modelled conduit, wherein it is assumed that acoustic signals propagating along the modelled conduit reflect from at least one point in the modelled conduit.
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55.发明授权公开(公告)号：US10859212B2
公开(公告)日：2020-12-08
申请号：US16024513
申请日：2018-06-29
Applicant: Hifi Engineering Inc.
Inventor： Seyed Ehsan Jalilian , Arne Dankers , David Westwick
Abstract: Methods, systems, and techniques for determining whether an acoustic event has occurred along a fluid conduit having acoustic sensors positioned therealong. The method uses a processor to, for each of the sensors, determine a predicted acoustic signal using one or more past acoustic signals measured prior to measuring a measured acoustic signal using the sensor; determine a prediction error between the measured acoustic signal and the predicted acoustic signal; from the prediction error, determine a power estimate of an acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor; and determine whether the power estimate of the acoustic source exceeds an event threshold for the sensor. When the power estimate of at least one of the acoustic sources exceeds the event threshold, the processor attributes the acoustic event to one of the sensors for which the power estimate of the acoustic source exceeds the event threshold.
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Patent Agency Ranking
56.发明授权公开(公告)号：US10725174B2
公开(公告)日：2020-07-28
申请号：US15753528
申请日：2016-08-22
Applicant: Hifi Engineering Inc.
Inventor： Seyed Ehsan Jalilian , Arne Dankers
IPC: G01S15/00 , G01S15/08 , G01S7/521 , F17D3/01 , G01S7/536 , E21B47/04 , E21B47/09 , F17D5/06 , G01H9/00 , G01S7/54
Abstract: Methods and systems for estimating a distance between an acoustic sensor and an acoustic reflector in a conduit are disclosed. One such method includes using the acoustic sensor to measure a combined acoustic signal that comprises an originating acoustic signal propagating along the conduit and an echo signal. The echo signal is generated by the originating acoustic signal reflecting off the acoustic reflector after propagating past the acoustic sensor. A frequency domain representation of the combined acoustic signal is determined and the echo signal is identified by identifying in the frequency domain representation periodic oscillations having a peak-to-peak difference between 0.75 Hz and 1500 Hz. The distance between the acoustic sensor and the acoustic reflector is determined from the velocity of the echo signal and a time required for the echo signal to propagate between the acoustic sensor and the acoustic reflector.
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57.发明授权公开(公告)号：US10704740B2
公开(公告)日：2020-07-07
申请号：US15773965
申请日：2016-11-03
Applicant: Hifi Engineering Inc.
Inventor： John Hull , Seyed Ehsan Jalilian , Oleksiy Pletnyov
Abstract: Various embodiments provide a method of simulating a leak in a pipeline. The method includes: receiving a fluid stream from a fluid supply; and outputting the received fluid stream through an outlet such that the received fluid stream hits an outer surface of the pipeline at a location opposite the outlet such that a vibration is caused in the pipeline. Some other embodiments provide a corresponding system for simulating a leak in a pipeline, and a corresponding outlet for coupling a conduit to a pipeline.
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公开(公告)号：US20190339145A1
公开(公告)日：2019-11-07
申请号：US16271623
申请日：2019-02-08
Applicant: Hifi Engineering Inc.
Inventor： John Hull , Seyed Ehsan Jalilian
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.
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公开(公告)号：US10428644B2
公开(公告)日：2019-10-01
申请号：US15105386
申请日：2014-12-15
Applicant: Hifi Engineering Inc.
Inventor： John Hull , Neil Gulewicz , Seyed Ehsan Jalilian
Abstract: A sound baffle device for use with an acoustic sensor deployed in a housing by a deployment line comprises a radially extending baffle plate and an affixing mechanism for affixing the baffle plate to the deployment line. The baffle plate is configured to reduce acoustic transmission between a first zone of the housing on one side of the baffle plate and a second zone of the housing on an opposite side of the baffle plate.
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公开(公告)号：US10422365B2
公开(公告)日：2019-09-24
申请号：US15739336
申请日：2016-06-27
Applicant: Hifi Engineering Inc.
Inventor： John Hull , Seyed Ehsan Jalilian , Derek Logan
IPC: F16B2/24 , F16B2/06 , F17D5/00 , G01B9/02 , G02B6/46 , G01B11/16 , G02B6/00 , F16L3/06 , F17D5/06
Abstract: A clamp for clamping optical fiber to a tube. The clamp has a body portion coupled at one end to a first arm and at an opposing end to a second arm, and a resilient portion to permit the clamp to elastically deform from a closed state in which the clamp is fastened around the tube to an open state in which the clamp is radially moveable off the tube. At least one of the body portion, the first arm and the second arm has a clamping surface to clamp a portion of the optical fiber against the tube when the clamp is fastened around the tube, and a clamping mechanism operable to extend at least part of the clamping surface towards the tube when the clamp is secured to the tube to increase a clamping force applied by the clamping surface.
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