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公开(公告)号：US12208192B2
公开(公告)日：2025-01-28
申请号：US17635857
申请日：2020-09-01
Applicant: ODINWELL AB
Inventor： Patrik Byhmer , Patrik Strömsten
Abstract: A method and device for monitoring a measurement object. A passive unit has a light source, which radiates radiated light modulated by at least one external measurement influence from the measurement object. An active unit has an optical detector, which receives the radiated and modulated light via an optical link. In addition, there is a transmitter unit emitting energy, such as optical energy, sound energy, electromagnetic energy etc. The emitted energy is coded by an energy signature and sent to the passive unit via an energy link. The passive unit receives the emitted energy by a receiver unit, which decodes the energy signature and moderates the radiated and modulated light in dependence of the energy signature. The received energy is also used to drive the light source. A processor unit may decode the signal for discriminating the signal from error sources.
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公开(公告)号：US20240230718A9
公开(公告)日：2024-07-11
申请号：US17972297
申请日：2022-10-24
Applicant: Keysight Technologies, Inc.
Inventor： Hal Robert Paver , Michael Thomas McTigue
IPC: G01R1/07 , G01R15/22 , G01R19/00 , G01R19/252 , G01R31/302
CPC classification number: G01R1/071 , G01R15/22 , G01R19/0084 , G01R19/252 , G01R31/3025
Abstract: A system and method are provided for compensating for thermal drift of a probe device. The method includes monitoring a first temperature of a laser source in a sensor head that receives output electrical signals from a DUT and outputs corresponding optical signals; monitoring a second temperature of a photoreceiver in a probe interface that converts the optical signals to electrical test signals to input to the test instrument; calculating a first value of a first bias voltage using the first temperature; applying the first value of the first bias voltage to the laser source to compensate for thermal drift when the first temperature is within a first predefined temperature range; calculating a second value of a second bias voltage for the photoreceiver using the second temperature; and applying the second value of the second bias voltage to the photoreceiver to compensate for thermal drift when the second temperature is within a second predefined temperature range.
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公开(公告)号：US11994539B2
公开(公告)日：2024-05-28
申请号：US17770292
申请日：2021-03-26
Applicant: SEIKOH GIKEN Co., Ltd. , Rohm Co., Ltd.
Inventor： Ryuji Osawa , Noriaki Hiraga
CPC classification number: G01R15/22 , G01R19/0084 , G02F1/0327 , G02F1/035 , G02F1/2252 , G02F2201/02 , G02F2202/20
Abstract: An optical voltage probe includes: an optical modulator 1 having two modulation electrodes 11 and 12, the optical modulator 1 being configured to modulate an intensity of an incident light depending on a voltage between the two modulation electrodes and output the incident light which is modulated; an input/output optical fiber 2 connected with the optical modulator 1; two contact terminal attachment portions 5, 6 to which contact terminals 3, 4 can be detachably attached and contacted, the two contact terminals 3, 4 being configured to be in contact with the points to be measured, the two contact terminal attachment portions 5, 6 being respectively connected with the modulation electrodes 11, 12; and a package 8 that houses the optical modulator 1 and a part of the input/output optical fiber 2. A voltage signal induced via the contact terminals 3, 4 is converted into an optical intensity modulation signal. When an electric wave having a measurement frequency is applied while the contact terminal attachment portions 5, 6 are opened, the package 8 exhibits a shielding effect of attenuating the electric wave by 15 dB or more compared to an output signal intensity measured without providing the package.
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公开(公告)号：US20230402632A1
公开(公告)日：2023-12-14
申请号：US18248793
申请日：2021-10-14
Applicant: CELLCENTRIC GMBH & CO. KG
Inventor： Philipp HAUSMANN , Marc KOELMEL , Benjamin PIECK
IPC: H01M8/04537 , H01M8/0202 , H01M8/242 , G01R15/22
CPC classification number: H01M8/04552 , H01M8/0269 , H01M8/242 , G01R15/22
Abstract: The invention relates to an apparatus for monitoring the cell voltage of an individual cell (3), formed by a membrane electrode assembly (4) and bipolar plates (6), of a fuel cell stack (1), the apparatus having a measuring device (7) for each of the individual cells (3), which measuring device comprises an optical signal generator (9) which is controllable by the measuring device. The apparatus according to the invention is characterized in that the measuring device (7) is formed on a flexible circuit board that is connected to a frame (5) of a framed membrane electrode assembly (4, 5) or is formed as part of the frame.
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公开(公告)号：US20220291260A1
公开(公告)日：2022-09-15
申请号：US17770292
申请日：2021-03-26
Applicant: SEIKOH GIKEN Co., Ltd. , Rohm Co., Ltd.
Inventor： Ryuji OSAWA , Noriaki HIRAGA
Abstract: An optical voltage prove includes: an optical modulator 1 having two modulation electrodes 11 and 12, the optical modulator 1 being configured to modulate an intensity of an incident light depending on a voltage between the two modulation electrodes and output the incident light which is modulated; an input/output optical fiber 2 connected with the optical modulator 1; two contact terminal attachment portions 5, 6 to which contact terminals 3, 4 can be detachably attached and contacted, the two contact terminals 3, 4 being configured to be in contact with the points to be measured, the two contact terminal attachment portions 5, 6 being respectively connected with the modulation electrodes 11, 12; and a package 8 that houses the optical modulator 1 and a part of the input/output optical fiber 2. A voltage signal induced via the contact terminals 3, 4 is converted into an optical intensity modulation signal. When an electric wave having a measurement frequency is applied while the contact terminal attachment portions 5, 6 are opened, the package 8 exhibits a shielding effect of attenuating the electric wave by 15 dB or more compared to an output signal intensity measured without providing the package.
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Patent Agency Ranking
公开(公告)号：US20210132127A1
公开(公告)日：2021-05-06
申请号：US17148178
申请日：2021-01-13
Applicant: WAGO Verwaltungsgesellschaft mbH
Inventor： Frank SELLKE , Jan REWALD
IPC: G01R27/18 , G01R31/52 , G01R19/165 , G01R15/22
Abstract: A ground conductor monitoring device, having: at least one ground conductor connection which is designed to connect a ground conductor potential, at least one first potential connection which is designed to connect a first electrical potential which differs from the ground conductor potential, at least one second potential connection which is designed to connect a second electrical potential which differs from the first potential and the ground conductor potential, at least one electrical switching device which is designed to establish an electrical connection, optionally in accordance with an electrical control signal, between the first potential connection and the ground conductor connection (connection state) or to interrupt same (interruption state), at least one control unit which is designed to automatically output control signals to the electrical switching device.
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公开(公告)号：US10816618B2
公开(公告)日：2020-10-27
申请号：US15988418
申请日：2018-05-24
Applicant: Siemens Healthcare GmbH
Inventor： Stefan Popescu
Abstract: A magnetic resonance (MR) body coil is provided with a supporting surface for support on an object to be examined and an outer side remote from the support side, wherein at least one light source is fastened to the outer side at a predefined position. A magnetic resonance system has at least one MR body coil and an image acquisition device for acquiring light, which may be radiated by the at least one light source of the at least one MR body coil. A method is used for operating a MR body coil, wherein at least one light source radiates light for positioning the MR body coil. A further method is used for positioning a MR body coil on an object to be examined, wherein at least one light source fastened to a MR body coil radiates light, the light is acquired by an image acquisition device, which includes at least one camera, and at least one position of the at least one light source is determined by the acquisition.
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公开(公告)号：US20200025805A1
公开(公告)日：2020-01-23
申请号：US16516427
申请日：2019-07-19
Applicant: Lumiker Aplicaciones Tecnológicas S.L.
Inventor： Francisco Javier BENGOECHEA DE LA LLERA
IPC: G01R15/22
Abstract: A method for measuring the current circulating through at least one conductor with the use of optical fiber-based measuring equipment is provided. According to one implementation the measuring equipment includes a first emitter that emits a first signal which reaches a sensing branch through a first branch, runs through the sensing branch, and is modified depending on the current circulating through the conductor. A modified first signal is received by a second receiver from a second branch. A second emitter emits a second signal which reaches the sensing branch through the second branch, runs through the sensing branch, and is modified depending on the current circulating through the conductor. A modified second signal is received by a first receiver from the first branch. The current circulating through the conductor is determined by combining the modified first signal and the modified second signal.
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公开(公告)号：US10520548B2
公开(公告)日：2019-12-31
申请号：US15785960
申请日：2017-10-17
Applicant: Toshiba America Electronic Components, Inc.
Inventor： Jurgis Astrauskas
Abstract: A system and method for monitoring, testing or configuring electrical devices includes an input amplifier having an input connected to a device load line to generate an output linearly proportional to a voltage on the load line. An output of the input amplifier is connected to a photodiode in an optical path with a phototransistor. The phototransistor generates an output proportional to light generated by the photodiode, and this output is amplified and passed to an analog-to-digital converter. The converter generates a digital voltage level corresponding to the amplified output of the phototransistor. Digital temperature information is used to further enhance linearity of a generated digital voltage level. Multiple quantum well photodiodes further improve measurement linearity.
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公开(公告)号：US09897662B2
公开(公告)日：2018-02-20
申请号：US14784141
申请日：2013-04-15
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Hikaru Miura , Mutsumi Kikuchi , Akihiko Kudoh , Tomonori Kanai
CPC classification number: G01R31/3658 , B60L3/12 , B60L11/1853 , B60L2240/547 , B60L2240/549 , G01R15/22 , G01R31/3606 , G01R31/3689 , H01M10/482 , H01M2010/4278 , H01M2220/20 , H02J1/10 , H02J7/0021 , Y02T10/7005 , Y02T10/705
Abstract: A battery system includes a battery module having a plurality of assembled batteries. Battery monitoring circuits are provided to correspond to each of the assembled batteries of the battery module. A control circuit controls operation of the battery monitoring circuits. A first signal transmission path transmits signals that are input and output between the battery monitoring circuits and the control circuit. A first isolation element is connected to the control circuit, and a second isolation element is connected to the battery monitoring circuit. The first signal transmission path is isolated from the control circuit by the first isolation element and is isolated from the battery monitoring circuit by the second isolation element. The electrical potential of the first signal transmission path is a floating potential in relation to the electrical potentials of the control circuit and battery monitoring circuits.
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