Patents by Inventor Viet Hoang
Viet Hoang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11976915Abstract: 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.Type: GrantFiled: December 1, 2022Date of Patent: May 7, 2024Assignee: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Publication number: 20230104471Abstract: 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.Type: ApplicationFiled: December 1, 2022Publication date: April 6, 2023Applicant: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Patent number: 11609086Abstract: 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.Type: GrantFiled: November 8, 2021Date of Patent: March 21, 2023Assignee: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Patent number: 11467255Abstract: A lidar sensor system and method use the parallax phenomenon to determine one or more attributes of an object, such its distance, size, or shape. An optical element illuminates the object with a linear beam along a first plane. A photodetector is displaced from the optical element so that it detects the reflection of the linear beam from the object along a second plane, which is at an angle to the first plane. A computer-implemented line detection module determines a measure of deviation of the linear beam reflection from a vanishing point of the first plane. A computer-implemented analysis module determines the attribute based on the measure of deviation.Type: GrantFiled: January 9, 2019Date of Patent: October 11, 2022Inventors: Siamak Akhlaghi Esfahany, Viet Hoang, Ilya Utkin, Murray Paulson, Ken Brizel
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Publication number: 20220310112Abstract: Audio-derived information is provided to a vehicle control system of a vehicle by attaching a microphone externally to a vehicle to generate an analog signal in response to sound waves external to the vehicle. An enclosure containing sound-attenuating material mechanically filters low frequency sounds from reaching the microphone transducer. An analog-to-digital converter converts the analog signal to a digital signal. A vehicle data bus transfers the digital signal to the vehicle control system.Type: ApplicationFiled: June 16, 2022Publication date: September 29, 2022Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Warren Sheydwasser, Ajay Sandhu
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Patent number: 11410673Abstract: Audio-derived information is provided to a vehicle control system of a vehicle by attaching a microphone externally to a vehicle to generate an analog signal in response to sound waves external to the vehicle. An enclosure containing sound-attenuating material mechanically filters low frequency sounds from reaching the microphone transducer. An analog-to-digital converter converts the analog signal to a digital signal. A vehicle data bus transfers the digital signal to the vehicle control system.Type: GrantFiled: May 3, 2018Date of Patent: August 9, 2022Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Warren Sheydwasser, Ajay Sandhu
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Publication number: 20220057193Abstract: 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.Type: ApplicationFiled: November 8, 2021Publication date: February 24, 2022Applicant: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Patent number: 11199393Abstract: 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.Type: GrantFiled: January 11, 2018Date of Patent: December 14, 2021Assignee: HiFi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Publication number: 20210308501Abstract: A respirator or mask includes a filtration medium including a fabric which is a non-woven or knit fabric having a mixture of natural and synthetic fibres.Type: ApplicationFiled: April 1, 2021Publication date: October 7, 2021Inventors: Ken BRIZEL, Viet HOANG, William CULLY
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Patent number: 11054288Abstract: 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.Type: GrantFiled: July 26, 2019Date of Patent: July 6, 2021Assignee: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Tom Clement
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Patent number: 10916260Abstract: A system for detection of a target sound in an environment of a vehicle, includes an audio sensor, a computer processor, and a memory storing a digital target sound template produced by converting a sample of the target sound in accordance with conversion parameters. The computer processor receives a sound signal from the audio sensor, digitizes the sound signal in accordance with the conversion parameters, and determines a degree of similarity between the digitized signal and the digital target sound template. The sound signal may be logarithmically amplified before being digitized. The sound signal may be received from two audio sensors, and the direction of the target sound may be determined based on a difference between time indices for detection of the target sound for each audio sensor.Type: GrantFiled: February 5, 2019Date of Patent: February 9, 2021Assignee: Soltare Inc.Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Ajay Sandhu
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Publication number: 20190346295Abstract: 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.Type: ApplicationFiled: July 26, 2019Publication date: November 14, 2019Applicant: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Tom Clement
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Patent number: 10416005Abstract: 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.Type: GrantFiled: December 4, 2015Date of Patent: September 17, 2019Assignee: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Tom Clement
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Publication number: 20190212414Abstract: A lidar sensor system and method use the parallax phenomenon to determine one or more attributes of an object, such its distance, size, or shape. An optical element illuminates the object with a linear beam along a first plane. A photodetector is displaced from the optical element so that it detects the reflection of the linear beam from the object along a second plane, which is at an angle to the first plane. A computer-implemented line detection module determines a measure of deviation of the linear beam reflection from a vanishing point of the first plane. A computer-implemented analysis module determines the attribute based on the measure of deviation.Type: ApplicationFiled: January 9, 2019Publication date: July 11, 2019Inventors: Siamak Akhlaghi Esfahany, Viet Hoang, llya Utkin, Murray Paulson, Ken Brizel
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Publication number: 20190172478Abstract: A system for detection of a target sound in an environment of a vehicle, includes an audio sensor, a computer processor, and a memory storing a digital target sound template produced by converting a sample of the target sound in accordance with conversion parameters. The computer processor receives a sound signal from the audio sensor, digitizes the sound signal in accordance with the conversion parameters, and determines a degree of similarity between the digitized signal and the digital target sound template. The sound signal may be logarithmically amplified before being digitized. The sound signal may be received from two audio sensors, and the direction of the target sound may be determined based on a difference between time indices for detection of the target sound for each audio sensor.Type: ApplicationFiled: February 5, 2019Publication date: June 6, 2019Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Ajay Sandhu
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Publication number: 20190165923Abstract: A new method to transmit data of IP applications over half-duplex channel. More precisely, this method makes it possible to run IP applications (such as e-mail, web . . . ) based on low speed, half-duplex channel (VHF, HF . . . ).Type: ApplicationFiled: November 22, 2018Publication date: May 30, 2019Applicant: VIETTEL GROUPInventors: Hoang Anh Nguyen, Viet Hoang Nguyen, Thai Binh Nguyen
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Patent number: 10236018Abstract: A system for detection of a target sound in an environment of a vehicle, includes an audio sensor, a computer processor, and a memory storing digital target sound templates produced by converting samples of the target sound in accordance with conversion parameters. The computer processor receives the sample sound signal from the audio sensor, converts the sample sound signal to a digital sample vector in accordance with the conversion parameters, compares the vector to each of the templates to determine if a degree of similarity of the vector to any one of the templates exceeds a predetermined threshold value, and notifies a user or a vehicle control system if the threshold value is exceeded.Type: GrantFiled: March 1, 2018Date of Patent: March 19, 2019Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Ajay Sandhu
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Publication number: 20180356210Abstract: 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.Type: ApplicationFiled: January 11, 2018Publication date: December 13, 2018Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Chris Henrikson, Ajay Sandhu, Adrian Dumitru, Thomas Clement, Dongliang Huang, Seyed Ehsan Jalilian
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Publication number: 20180350391Abstract: Audio-derived information is provided to a vehicle control system of a vehicle by attaching a microphone externally to a vehicle to generate an analog signal in response to sound waves external to the vehicle. An enclosure containing sound-attenuating material mechanically filters low frequency sounds from reaching the microphone transducer. An analog-to-digital converter converts the analog signal to a digital signal. A vehicle data bus transfers the digital signal to the vehicle control system.Type: ApplicationFiled: May 3, 2018Publication date: December 6, 2018Inventors: Brian Moore, Viet Hoang, Ken Brizel, Siamak Akhlaghi Esfahany, Warren Sheydwasser, Ajay Sandhu
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Publication number: 20180266854Abstract: 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.Type: ApplicationFiled: December 4, 2015Publication date: September 20, 2018Applicant: Hifi Engineering Inc.Inventors: Brian H. Moore, Walter Jeffrey Shakespeare, Phillip William Wallace, Viet Hoang, Tom Clement