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公开(公告)号：US20240272244A1
公开(公告)日：2024-08-15
申请号：US18508794
申请日：2023-11-14
IPC分类号： G01R33/032 , G01R15/24
CPC分类号： G01R33/0322 , G01R15/246
摘要： A magneto-optical sensor can be used to measure electrical current with a very narrow pulse width as sensed by the magnetic field in the transmission line region of a pulsed power accelerator. Pulsed power accelerator experimental results agreed remarkably well with the Faraday effect theory, device physical model, and reference electrical current shunt data.
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公开(公告)号：US20240159800A1
公开(公告)日：2024-05-16
申请号：US18509107
申请日：2023-11-14
发明人： Ralf Albrecht , Gareth Lees
IPC分类号： G01R15/24
CPC分类号： G01R15/24
摘要： It is described an arrangement for obtaining electrical state information related to an electrical power cable, the arrangement comprising: at least one current sensor arrangeable at at least one measurement location and adapted to generate a current sensor signal indicative of a value of an electrical current related to the electrical power cable; at least one electrical-mechanical transducer arranged in order to receive a current sensor signal based driving signal and adapted to generate a mechanical response at a response surface based on the driving signal; a distributed acoustic sensing equipment, comprising: at least one first optical fibre having a first end and a second end, a contact portion of the first optical fibre between the first end and the second end being mechanically in contact with the response surface; an interrogation system adapted to generate temporally successively optical pulses and coupleable to the first end of the first optical fibre in order to inject the optical pulses into the first optical fibre and adapted to detect first Rayleigh backscattered light returning from the first optical fibre in a time resolved manner; a processing portion adapted to process the detected first Rayleigh backscattered light in order to at least determine the value of the current.
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公开(公告)号：US20230366913A1
公开(公告)日：2023-11-16
申请号：US18247059
申请日：2021-09-28
申请人： PsiQuantum, Corp.
发明人： Vimal KAMINENI , Nicholas V. LICAUSI , Ann MELNICHUK , James Jay MCMAHON , Henrik JOHANSSON , Alexey VERT
IPC分类号： G01R15/24 , G02F1/035 , G01J1/44 , G01J5/0818 , G01R13/02 , H01L27/144 , H01L31/0352
CPC分类号： G01R15/242 , G02F1/035 , G01J1/44 , G01J5/0818 , G01R13/0281 , H01L27/1446 , H01L31/035227 , G01J2001/442
摘要： A photonic integrated circuit including a substrate, a plurality of oxide layers on the substrate, and various passive and active integrated optical components in the plurality of oxide layers. The integrated optical components include silicon nitride waveguides, a Pockets effect phase shifter (e.g., BaTiO3 phase shifter), a superconductive nanowire single photon detector (SNSPD), an optical isolation structure surrounding the SNSPD, a single photon generator, a thermal isolation structure, a heater, a temperature sensor, a photodiode for data communication (e.g., a Ge photodiode), or a combination thereof.
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公开(公告)号：US20230288641A1
公开(公告)日：2023-09-14
申请号：US18020929
申请日：2021-08-16
IPC分类号： G02B6/38 , G01R33/032 , G01R15/24
CPC分类号： G02B6/3818 , G01R33/0322 , G01R15/246
摘要： An optical waveguide for a magneto-optical current sensor. The optical waveguide includes a first end surface, through which light can be coupled into the optical waveguide, and a second end surface, through which light can be coupled out of the optical waveguide, wherein at least one of the two end surfaces has an anti-reflective coating.
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公开(公告)号：US11747370B2
公开(公告)日：2023-09-05
申请号：US17744070
申请日：2022-05-13
发明人： Bowen Zhao , Shaochun Zhang
CPC分类号： G01R15/247 , G01R19/0092
摘要： The present disclosure relates to the technical field of current sensors, and provides a fiber-optic current transformer based on nitrogen-vacancy (NV) centers in diamond, and a measurement method. The fiber-optic current transformer based on NV centers in diamond includes a device for laser light excitation and reflected light reception and analysis, a diamond NV center probe, a magnetic concentrator, and a microwave excitation device. The fiber-optic current transformer based on NV centers in diamond includes three measurement methods: an all-optical measurement method, a non-all-optical measurement method, and a measurement method combining the all-optical measurement method and the non-all-optical measurement method. A sensor in the present disclosure has advantages of a simple structure, strong practicability, resistance to external interference, and strong robustness.
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公开(公告)号：US11543438B2
公开(公告)日：2023-01-03
申请号：US17280338
申请日：2019-09-06
发明人： Stefan Schuberth
摘要： A glass ring for current measurements includes a glass body, which can be disposed around an electrical conductor and has a light entry surface and a light exit surface. The glass ring allows light which enters the glass body through the light entry surface to circulate completely around the conductor in the glass body by reflection on external sides or outer faces of the glass body, the light exiting from the glass body on the light exit surface. The glass ring is formed of a monolithic glass body. A method for optical current measurement includes using a current flow in an electrical conductor to generate an electromagnetic field around the conductor, by which a polarization of a light beam in the glass ring around the conductor, in particular with a plane perpendicular to the longitudinal axis of the conductor, is changed as the light beam circulates around the conductor.
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公开(公告)号：US11519942B2
公开(公告)日：2022-12-06
申请号：US17340462
申请日：2021-06-07
IPC分类号： G01R15/24 , G01R33/032
摘要： Disclosed is an optical fiber winding for measuring the current circulating through a conductor. According to one embodiment the optical fiber winding includes a central support core extending in a longitudinal direction, a first optical fiber cable arranged around the central support core, a second optical fiber cable arranged around the central support core, the first and second optical fiber cables extend in a helical manner around the central support core. According to one embodiment the first optical fiber cable is twisted about its longitudinal axis in a first twist direction, and the second optical fiber cable is twisted about its longitudinal axis in a second twist direction, the first twist direction being opposite the second twist direction. Optical fiber-based current measuring equipment is also disclosed.
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公开(公告)号：US11237224B2
公开(公告)日：2022-02-01
申请号：US16592086
申请日：2019-10-03
发明人： Eunsun Noh
摘要： A magnetic property measuring system may include a stage configured to load a sample and to rotate the sample about a rotation axis such that the stage rotates the sample by a rotation angle, the rotation axis extending normal to a top surface of the sample. The magnetic property measuring system may further include a polarizer having a first polarization axis, and an analyzer having a second polarization axis. The polarizer and the analyzer may enable the first and second polarization axes to be independently rotated based on the rotation angle of the sample.
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公开(公告)号：US20210396786A1
公开(公告)日：2021-12-23
申请号：US17307329
申请日：2021-05-04
摘要： A magneto-optical sensor for sensing a current flowing through a conductor includes a light source capable of providing a linearly-polarised optical beam, and a polarisation analyser configured to perform a differential measurement of two polarisation components of the linearly-polarised optical beam having travelled along an optical path arranged between the light source and the polarisation analyser. The optical path forms a closed trajectory around the conductor. The sensor comprises a cell containing an atomic gas arranged along the optical path.
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公开(公告)号：US20210389350A1
公开(公告)日：2021-12-16
申请号：US17340462
申请日：2021-06-07
IPC分类号： G01R15/24 , G01R33/032
摘要： Disclosed is an optical fiber winding for measuring the current circulating through a conductor. According to one embodiment the optical fiber winding includes a central support core extending in a longitudinal direction, a first optical fiber cable arranged around the central support core, a second optical fiber cable arranged around the central support core, the first and second optical fiber cables extend in a helical manner around the central support core. According to one embodiment the first optical fiber cable is twisted about its longitudinal axis in a first twist direction, and the second optical fiber cable is twisted about its longitudinal axis in a second twist direction, the first twist direction being opposite the second twist direction. Optical fiber-based current measuring equipment is also disclosed.
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