公开(公告)号：US12111338B2

公开(公告)日：2024-10-08

申请号：US17336278

申请日：2021-06-01

申请人： Xiaotian Steve Yao

发明人： Xiaotian Steve Yao

IPC分类号： G01R15/24 ,  G01K11/32 ,  G01R19/00

CPC分类号： G01R15/246 ,  G01K11/32 ,  G01R19/0092

摘要： Optical techniques and sensor devices for sensing or measuring electric currents and/or temperature based on photonic sensing techniques in optical reflection modes by using optical dielectric materials exhibiting Faraday effects are provided in various configurations. The disclosed optical sensing technology uses light to carry and transmit the current or temperature information obtained at the sensing location to a remote base station and this optical transmission allows remote sensing in various applications and provide a built-in temperature calibration mechanism to enhance the measurement accuracy in a range of different temperature conditions.

公开(公告)号：US20240230724A9

公开(公告)日：2024-07-11

申请号：US18278766

申请日：2022-01-11

申请人： Siemens Aktiengesellschaft

发明人： ULRICH WETZEL ,  JÜRGEN ZETTNER

IPC分类号： G01R15/24

CPC分类号： G01R15/246

摘要： A method for monitoring a semiconductor element in a semiconductor module, wherein the semiconductor module has feed lines contacting the semiconductor element, includes arranging a magneto-optical sensor in a region of the semiconductor element or of at least one of the feed lines, reflecting a polarized light signal from the magneto-optical sensor or transmitting a polarized light signal through the magneto-optical sensor, and determining a current from a polarization of the reflected or transmitted light signal.

公开(公告)号：US20240133924A1

公开(公告)日：2024-04-25

申请号：US18278766

申请日：2022-01-11

申请人： Siemens Aktiengesellschaft

发明人： ULRICH WETZEL ,  JÜRGEN ZETTNER

IPC分类号： G01R15/24

CPC分类号： G01R15/246

摘要： A method for monitoring a semiconductor element in a semiconductor module, wherein the semiconductor module has feed lines contacting the semiconductor element, includes arranging a magneto-optical sensor in a region of the semiconductor element or of at least one of the feed lines, reflecting a polarized light signal from the magneto-optical sensor or transmitting a polarized light signal through the magneto-optical sensor, and determining a current from a polarization of the reflected or transmitted light signal.

公开(公告)号：US11899044B2

公开(公告)日：2024-02-13

申请号：US17875547

申请日：2022-07-28

申请人： DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  MIRISE Technologies Corporation

发明人： Tomohiro Nezuka ,  Yoshikazu Furuta ,  Shotaro Wada

IPC分类号： G01R33/04 ,  G01R15/14 ,  G01R27/02 ,  G01R19/00 ,  G01R15/24 ,  G01R1/07 ,  G01R33/02 ,  G01C17/30 ,  G01C17/28 ,  G01C17/38

CPC分类号： G01R15/146 ,  G01R1/071 ,  G01R15/242 ,  G01R15/246 ,  G01R19/0092 ,  G01R27/02 ,  G01R33/02 ,  G01R33/04 ,  G01R33/045 ,  G01C17/28 ,  G01C17/30 ,  G01C17/38

摘要： A current sensor for a detection target current using a shunt resistor includes: a resistance value correction circuit having a correction resistor; a signal application unit that applies an alternating current signal to a series circuit of the shunt resistor and the correction resistor; a voltage detection unit that detects terminal voltages of the shunt resistor and the correction resistor; and a correction unit that calculates a resistance value of the shunt resistor and corrects the resistance value for detection; and a power supply circuit having a first power supply generation unit that generates a first power supply of the signal application unit from an input power supply of an outside; and a second power supply generation unit that generates a second power supply of the voltage detection unit.

公开(公告)号：US11892479B2

公开(公告)日：2024-02-06

申请号：US17627118

申请日：2020-03-31

申请人： CITIZEN FINEDEVICE CO., LTD. ,  CITIZEN WATCH CO., LTD. ,  Shinshu University

发明人： Mitsunori Miyamoto ,  Toshiya Kubo ,  Toshiroh Sato ,  Makoto Sonehara

IPC分类号： G01R15/24 ,  G01R33/032

CPC分类号： G01R15/246 ,  G01R33/0322

摘要： A magnetic field sensor element 1 includes a light emitter 10 emitting a first linearly polarized light, a first optical element 20 emitting a first linearly polarized wave and the second linearly polarized wave in response to a first linearly polarized light incident, and emitting a second linearly polarized light in response to a third linearly polarized wave and the a linearly polarized wave incident, at least one pair of magnetic field sensor elements 50 capable of disposing in a predetermined magnetic field across the measured conductor, having a light transmissive, changing the phase of transmitted light in accordance with the magnetic field, and fixing a relative position therebetween, an optical path 30 including a first optical path propagating the first linearly polarized wave and the fourth linearly polarized wave, and a second optical path propagating the second linearly polarized wave and the third linearly polarized wave, and connected to the first optical element and the magnetic field sensor element, a detected signal generator 60 outputting a detected signal corresponding to the magnetic field, by receiving two components of the second linearly polarized light, and converting to the electrical signal, and an optical branching element transmitting the first linearly polarized light to the first optical element and branching the second linearly polarized light to the detected signal generator.

公开(公告)号：US11815531B2

公开(公告)日：2023-11-14

申请号：US17875677

申请日：2022-07-28

申请人： DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  MIRISE Technologies Corporation

发明人： Tomohiro Nezuka ,  Yoshikazu Furuta ,  Shotaro Wada

IPC分类号： G01R31/00 ,  G01R15/14 ,  G01R27/02 ,  G01R15/24 ,  G01R1/07 ,  H02S50/10 ,  H02S50/00 ,  H02S50/15

CPC分类号： G01R15/146 ,  G01R1/071 ,  G01R15/242 ,  G01R15/246 ,  G01R27/02 ,  H02S50/00 ,  H02S50/10 ,  H02S50/15

摘要： A current sensor of a detection target current using a shunt resistor includes: a resistance value correction circuit having: a correction resistor; a signal application unit that applies an alternating current signal to a series circuit of the shunt resistor and the correction resistor; a first voltage detection unit that detects the terminal voltage of the shunt resistor; a second voltage detection unit that detects a terminal voltage of the correction resistor; and a correction unit that calculates the resistance value of the shunt resistor based on a first voltage detection value by the first voltage detection unit and a second voltage detection value by the second voltage detection unit, and corrects the resistance value for current detection based on a calculated resistance value of the shunt resistor.

公开(公告)号：US20180067147A1

公开(公告)日：2018-03-08

申请号：US15695858

申请日：2017-09-05

申请人： ABB Schweiz AG

发明人： XUN GU ,  Klaus Bohnert ,  Sergio Vincenzo Marchese

IPC分类号： G01R15/24 ,  G01R19/00 ,  G01R35/00

CPC分类号： G01R15/241 ,  G01R15/246 ,  G01R19/0084 ,  G01R35/005

摘要： In order to measure a voltage, an electro-optic element is placed in an electrical field generated by the voltage, and light is passed from a light source through a Faraday rotator and the electro-optic element onto a reflector and from there back through the electro-optic element and the Faraday rotator, thereby generating a voltage-dependent phase shift between two polarizations of the light. The interference contrast as well as a principal value of the total phase shift between said polarizations are measured and converted to a complex value having an absolute value equal to the contrast and a phase equal to the principal value. This complex value is offset and scaled using calibration values in order to calculate a compensated complex value. The voltage is derived from the compensated complex value.

公开(公告)号：US09817038B2

公开(公告)日：2017-11-14

申请号：US15389752

申请日：2016-12-23

申请人： GRIDVIEW OPTICAL SOLUTIONS, LLC.

发明人： Philip B. Davis ,  Ye Li ,  Theodore C. Konetski

IPC分类号： G01R13/38 ,  G01R15/24

CPC分类号： G01R15/246 ,  G01R1/071 ,  G01R15/142 ,  G01R15/247

摘要： An optical sensor that senses current by directing polarized light across an airgap that is orthogonal to a direction of current running through a conductor. The sensor includes a prism having a high Verdet constant for high sensitivity to magnetic fields, which cause an angle of polarization of the polarized light to be rotated as an indication of the magnitude of current. A polarizing beamsplitter having a low Verdet constant is mounted to the prism so that incoming light that is traveling in a direction orthogonal to the magnetic field being sensed across the airgap is insensitive to unwanted magnetic fields produced by nearby conductors. The distance the light travels in this orthogonal direction is minimized, reducing the overall volume of the sensor, making a compact sensor highly sensitive to magnetic fields of interest, largely insensitive to unwanted magnetic fields, and having a very high dynamic range for sensing current.

公开(公告)号：US20170191171A1

公开(公告)日：2017-07-06

申请号：US14989582

申请日：2016-01-06

申请人： Saudi Arabian Oil Company

发明人： Saeed Omar Aljabri

IPC分类号： C23F13/22 ,  F17D5/00 ,  F16L58/00 ,  C23F13/04

CPC分类号： C23F13/22 ,  C23F13/04 ,  C23F2213/32 ,  F16L58/00 ,  F17D5/00 ,  G01R15/246 ,  G01R33/032

摘要： A system implementing fiber optics to monitor pipeline cathodic protection systems includes a cathodic protection system coupled to a hydrocarbon pipeline and a fiber optic system connected to the cathodic protection system. The cathodic protection system passes a current through the hydrocarbon pipeline to control corrosion of the hydrocarbon pipeline. The fiber optic system measures the current flowing through the hydrocarbon pipeline over time and provides the measured current.

公开(公告)号：US09632113B2

公开(公告)日：2017-04-25

申请号：US14208749

申请日：2014-03-13

申请人： OFS Fitel, LLC

发明人： Poul Kristensen

IPC分类号： G02B6/26 ,  G01R15/24 ,  G01R33/032

CPC分类号： G01R15/246 ,  G01R33/0322

摘要： A few-moded fiber is doped such that spatial modes of a signal exhibit different magnetic-field-dependent effects. Based on these magnetic-field-dependent effects, one can determine the electric current that induced a magnetic field that caused these effects.