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公开(公告)号：US20240068893A1
公开(公告)日：2024-02-29
申请号：US18260172
申请日：2022-01-06
发明人： Haishan SUN , Dyon BUITENKAMP , Logan THEIS , Andrew HARING
CPC分类号： G01L1/247 , G01L19/0092
摘要： An example method injects a source light into a sensor cavity body, configured with an optical path including first and second reflecting surfaces, and structured to change the optical path distance between the first and second surface in response to subject condition. Sensor reflection optical signals are received from the senor cavity body, with first reflection signals from the first reflecting surface and se second reflection signals from the second reflecting surface and routed to an interferometer with a first optical path to a first reflector and a second optical path to a second reflector. Interferometer reflector signals, including reflections of the sensor reflection signals from the first reflector and the second reflector are received and phase shift coupled into separate channel signals, including first channel signals, second channel signals, and third channel signals, mutually spaced with respect to phase. A computerized dynamic obtains dynamic measurement of the subject condition, through detecting changes in the optical path distance based on the first, second, and third channel signals.
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公开(公告)号：US11002594B2
公开(公告)日：2021-05-11
申请号：US15776246
申请日：2016-11-18
申请人： SENTEK Instrument, LLC , Lingmei Ma , Bo Dong , Anbo Wang
发明人： Lingmei Ma , Bo Dong , Anbo Wang
摘要： Forming a light pulse having a plurality of time-dependent frequency components such as a chirped light pulse or a light pulse group and superposing reflected light from different portions of an optical fiber allows detection of changes in effective optical path differences due to physical parameters in the environment of the optical fiber by sensing the optical interference pattern of each light frequency and wavelength. The development of a plurality of interference patterns from each light pulse provides sufficient information for robust demodulation by known methods to produce signals having good fidelity to variations in the physical parameters of interest, particularly vibrations and acoustic waves. The location of the measured physical parameter along the optical fiber can be determined from the time difference between injecting the light pulse and detection of a reflection or Rayleigh backscattering and diffraction index of the optical fiber.
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公开(公告)号：US20180058949A1
公开(公告)日：2018-03-01
申请号：US15705737
申请日：2017-09-15
CPC分类号： G01K11/3206 , G01D5/266 , G01D5/268 , G01L9/0079 , G01L19/0092
摘要： A sensor for measuring pressure, temperature or both may be provided. The sensor may include a diaphragm that may respond to a change in temperature or pressure, a base connected to the diaphragm, a cavity, and an optical fiber that may conduct light reflected off of a surface of the diaphragm. The diaphragm and base may be sapphire elements. An interrogator may be provided for detecting a deflection of the diaphragm.
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4.发明授权公开(公告)号：US09677957B2
公开(公告)日：2017-06-13
申请号：US14092212
申请日：2013-11-27
发明人： Bo Dong , Fabin Shen , Anbo Wang
CPC分类号： G01L1/246 , E21B47/123 , G01D5/35312 , G01D5/35316 , G01D18/00
摘要： A serial weak FBG interrogator is disclosed. The serial weak FBG interrogator may include a CW tunable laser or pulsed laser utilized as a laser source and an EDFA. The serial weak FBG interrogator may also be an interrogation of a single sensor system by utilization of a DFB laser which utilizes a single sensor, which may be an interferometer sensor, an extrinsic Fabry-Perot interferometer or a wavelength-modulated sensor. The serial weak FBG interrogator may also include a computer system or CSPU.
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公开(公告)号：US11150144B2
公开(公告)日：2021-10-19
申请号：US16681998
申请日：2019-11-13
IPC分类号： G01K11/32 , G01K11/3206 , G01L9/00 , G01L19/00 , G01D5/26
摘要： A system for measuring pressure, temperature or both includes a diaphragm that responds to a change in temperature or pressure, and a base connected to the diaphragm that has a sapphire element. Between the diaphragm and the base is a cavity. An optical fiber that conducts light reflected off of a surface of the diaphragm is adjacent the cavity. An interrogator is used for detecting a deflection of the diaphragm based on at least two reflected light signals having similar wavelengths and coherence lengths. A quadrature phase detection unit demodulates signals received by the interrogator.
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公开(公告)号：US20200249075A1
公开(公告)日：2020-08-06
申请号：US15776246
申请日：2016-11-18
申请人： Lingmei Ma , SENTEK Instrument, LLC
发明人： Lingmei Ma , Bo Dong , Anbo Wang
摘要： Forming a light pulse having a plurality of time-dependent frequency components such as a chirped light pulse or a light pulse group and superposing reflected light from different portions of an optical fiber allows detection of changes in effective optical path differences due to physical parameters in the environment of the optical fiber by sensing the optical interference pattern of each light frequency and wavelength. The development of a plurality of interference patterns from each light pulse provides sufficient information for robust demodulation by known methods to produce signals having good fidelity to variations in the physical parameters of interest, particularly vibrations and acoustic waves. The location of the measured physical parameter along the optical fiber can be determined from the time difference between injecting the light pulse and detection of a reflection or Rayleigh backscattering and diffraction index of the optical fiber.
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公开(公告)号：US10408995B1
公开(公告)日：2019-09-10
申请号：US15650079
申请日：2017-07-14
摘要： Method for creating an optical sensing fiber having a reflective structure integrally disposed therein, comprising: providing an optical fiber having a core and a cladding layer disposed in optical contact with the core, and having a polymer coating layer disposed in contact with and surrounding the cladding layer, the coating layer at least partially transparent in the wavelengths of 390-600 nm; providing a source of electromagnetic radiation having a wavelength in the range of 390-600 nm; and delivering a selected wavelength of the electromagnetic radiation through the coating layer to a selected location within the fiber core or cladding such that the delivered electromagnetic radiation alters the core or cladding to create at least one reflective structure in the core or cladding at the selected location.
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公开(公告)号：US09804033B2
公开(公告)日：2017-10-31
申请号：US14261883
申请日：2014-04-25
CPC分类号： G01K11/3206 , G01D5/266 , G01D5/268 , G01L9/0079 , G01L19/0092
摘要： A sensor for measuring pressure, temperature or both may be provided. The sensor may include a diaphragm that may respond to a change in temperature or pressure, a base connected to the diaphragm, a cavity, and an optical fiber that may conduct light reflected off of a surface of the diaphragm. The diaphragm and base may be sapphire elements. An interrogator may be provided for detecting a deflection of the diaphragm.
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公开(公告)号：US20140152995A1
公开(公告)日：2014-06-05
申请号：US14092212
申请日：2013-11-27
发明人： Bo DONG , Fabin Shen , Anbo Wang
IPC分类号： G01B9/02
CPC分类号： G01L1/246 , E21B47/123 , G01D5/35312 , G01D5/35316 , G01D18/00
摘要： A serial weak FBG interrogator is disclosed. The serial weak FBG interrogator may include a CW tunable laser or pulsed laser utilized as a laser source and an EDFA. The serial weak FBG interrogator may also be an interrogation of a single sensor system by utilization of a DFB laser which utilizes a single sensor, which may be an interferometer sensor, an extrinsic Fabry-Perot interferometer or a wavelength-modulated sensor. The serial weak FBG interrogator may also include a computer system or CSPU.
摘要翻译： 公开了一种串行弱FBG询问器。 串联弱FBG询问器可以包括用作激光源的CW可调谐激光器或脉冲激光器和EDFA。 串行弱FBG询问器也可以是通过利用DFB激光器对单个传感器系统的询问，DFB激光器使用单个传感器，其可以是干涉仪传感器，外部法布里 - 珀罗干涉仪或波长调制传感器。 串行弱FBG询问器还可以包括计算机系统或CSPU。
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公开(公告)号：US20140318273A1
公开(公告)日：2014-10-30
申请号：US14261883
申请日：2014-04-25
CPC分类号： G01K11/3206 , G01D5/266 , G01D5/268 , G01L9/0079 , G01L19/0092
摘要： A sensor for measuring pressure, temperature or both may be provided. The sensor may include a diaphragm that may respond to a change in temperature or pressure, a base connected to the diaphragm, a cavity, and an optical fiber that may conduct light reflected off of a surface of the diaphragm. The diaphragm and base may be sapphire elements. An interrogator may be provided for detecting a deflection of the diaphragm.
摘要翻译： 可以提供用于测量压力，温度或二者的传感器。 传感器可以包括可响应温度或压力变化的隔膜，连接到隔膜的基座，空腔和可以传导从隔膜表面反射的光的光纤。 隔膜和底座可以是蓝宝石元件。 可以提供用于检测隔膜的偏转的询问器。
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