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1.发明公开公开(公告)号：US20240345145A1
公开(公告)日：2024-10-17
申请号：US18292683
申请日：2022-07-15
发明人： Franz-Josef Schuster
CPC分类号： G01R27/025 , G01R35/00
摘要： The invention relates to the self-diagnosis of a circuit for measuring the insulation resistance of a battery system, the circuit having a first switch, which connects the positive terminal of the battery system to earth via a series-connected first comparator resistor, and a second switch, which connects the negative terminal of the battery system to earth via a series-connected second comparator resistor. Current measurements are made via the closed first switch to obtain a measured first current flow and via the closed second switch to obtain a measured second current flow, wherein at any one time only one of the two switches closed, the theoretical current flow via the switches is calculated on the basis of the voltage of the battery system and the size of the comparator resistor, and the measured current flow, is compared with the associated theoretical current flow, wherein an error signal is output and/or an error action is carried out when the result of the comparison is above or below a predefined reference value range.
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公开(公告)号：US12105127B2
公开(公告)日：2024-10-01
申请号：US18088931
申请日：2022-12-27
发明人： Qichao Zhao , Ran Yang , Zhao Li
摘要： Disclosed are a detection circuit and apparatus based on equipotential shielding. A first connection end of a row control circuit, configured to be connected to a row lead of an array piezoresistive sensor; a control end of the row control circuit, connected to a main control chip for outputting a control signal; a second connection end of the row control circuit, connected to a first power supply terminal; and a row pull-up resistor, with an end connected to the row lead and another end connected to a second power supply terminal. Herein, each row lead corresponds to one row pull-up resistor; each column lead of the array piezoresistive sensor is connected to an input end of an inverse adder; an output end of the inverse adder is connected to a first connection end of the column control circuit.
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公开(公告)号：US12099081B2
公开(公告)日：2024-09-24
申请号：US18016399
申请日：2021-09-10
发明人： Zunhui Xiao , Meng Huang , Jing Wang , Xianqiao Yu , Hongdi An , Ningning Chen
IPC分类号： G01R27/02
CPC分类号： G01R27/02
摘要： The present disclosure provides a method and device for detecting insulation impedance of a photovoltaic inverter. The method includes: detecting, after a first path of photovoltaic input is electrically connected to the photovoltaic inverter, whether a second path of photovoltaic input needs to be electrically connected to the photovoltaic inverter; if the second path of photovoltaic input needs to be electrically connected to the photovoltaic inverter, causing the first path of photovoltaic input to stop operating, and then detecting insulation impedance of the second path of photovoltaic input; judging whether the insulation impedance of the second path of photovoltaic input satisfies a preset impedance condition; and if the insulation impedance of the second path of photovoltaic input satisfies the preset impedance condition, causing the second path of photovoltaic input to be electrically connected to the photovoltaic inverter, and causing the first path of photovoltaic input and the second path of photovoltaic input to perform grid-connected operation. The present disclosure resolves the problem in the prior art that insulation detection is inaccurate when two paths of photovoltaic input are grid-connected, such that insulation impedance detection results are more accurate, thereby increasing the safety of the inverter.
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公开(公告)号：US12074427B2
公开(公告)日：2024-08-27
申请号：US17865422
申请日：2022-07-15
发明人： Min-Hong Kim , Taejoon Kim , Jungmok Park , Hyun-Wook Cho , Jaewoo Choi
CPC分类号： H02H3/24 , G01R27/025 , G01R31/2837 , G01R31/50
摘要： An input sensor short-circuit inspection method including: setting an inspection frequency for detecting a short-circuit of an input sensor comprising a plurality of electrodes; driving the input sensor in an inspection mode at the set inspection frequency; and detecting the short-circuit of the input sensor based on a capacitance charged between adjacent electrodes among the plurality of electrodes of the input sensor in the inspection mode.
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公开(公告)号：US12072366B2
公开(公告)日：2024-08-27
申请号：US18220009
申请日：2023-07-10
申请人： Bender GmbH & Co. KG
发明人： Pascal Becker
CPC分类号： G01R31/086 , G01R15/18 , G01R23/00 , G01R27/025 , G01R27/08 , G01R27/18 , G01R27/2605
摘要： A method and an electric circuit arrangement for determining a branch insulation resistance and a branch leakage capacitance of a line branch to be monitored in a branched, ungrounded power supply system having active conductors and a measuring voltage fed centrally by a controllable measuring voltage source and a residual current caused by the measuring voltage being registered using a current sensor in the line branch to be monitored. The centrally supplied measuring voltage is formed over a generator period having a characteristic signal form defined via the frequency composition. By this (frequency) modulation of the measuring voltage, information is transmitted from the central feed location of the measuring voltage to the current sensor disposed in the line branch to be monitored. Based on this information, the current sensor can establish with which resistance value the coupling circuit feeds the measuring voltage in the corresponding generator period, without another communication channel being required.
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公开(公告)号：US12072362B2
公开(公告)日：2024-08-27
申请号：US17517449
申请日：2021-11-02
申请人： Analog Devices, Inc.
发明人： Mohit Gopalraj
IPC分类号： G01R27/02 , G01R31/319 , H02H9/04
CPC分类号： G01R27/02 , G01R31/31905 , H02H9/044
摘要： Apparatus and methods for characterizing electrical components for evaluating performance in a high voltage transient protection circuit. Impedance graphs provided by manufacturers for electrical components are typically low voltage measurements that do not necessarily accurately reflect component performance at high voltages above 150 volts. It is important to characterize and understand the behavior of these components at high voltages in order to ensure the components will protect circuitry as expected. In certain embodiments, a characterization method includes obtaining time domain voltage measurements from two terminals of a device under test (DUT) as it is exposed to high voltage transients from an electrical fast transient (EFT) generator. The time domain voltage data is transformed into frequency domain voltage data using a transform algorithm, and additional analysis is performed to derive scattering parameters, impedance, and other valuable metrics for component characterization.
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公开(公告)号：US12032007B2
公开(公告)日：2024-07-09
申请号：US17572906
申请日：2022-01-11
申请人： IMAGINETEC LTD
发明人： Ivan Kaloyanov
CPC分类号： G01R27/02 , G01R27/2605 , G01R35/007
摘要： An apparatus comprises a signal generator; first and second electrodes, the second electrode being connected to a first terminal of the signal generator; a processor; and a first switch configured to connect the first electrode to the processor, the first switch having a first position and a second position. The processor is configured to determine one or more values of a first electrical parameter based on a signal received from the first electrode via the first switch in the first position, and to determine one or more values of a second electrical parameter based on a signal received from the first electrode via the first switch in the second position.
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公开(公告)号：US12019043B2
公开(公告)日：2024-06-25
申请号：US17360873
申请日：2021-06-28
IPC分类号： G01R27/08 , A61B5/0531 , A61B5/0537 , A61B5/08 , G01N27/02 , G01R1/20 , G01R19/00 , G01R27/02 , G01R27/14
CPC分类号： G01N27/028 , A61B5/0531 , A61B5/0537 , A61B5/0809 , G01R1/203 , G01R19/0092 , G01R27/02 , G01R27/08 , G01R27/14 , H01L2224/48091 , H01L2224/48472 , H01L2924/00
摘要： Accurately measuring bio-impedance is important for sensing properties of the body. Unfortunately, contact impedances can significantly degrade the accuracy of bio-impedance measurements. To address this issue, circuitry for implementing a four-wire impedance measurement can be configured to make multiple current measurements. The multiple current measurements set up a system of equations to allow the unknown bio-impedance and contact impedances to be derived. The result is an accurate bio-impedance measurement that is not negatively impacted by large contact impedances. Moreover, bad contacts with undesirably large impedances can be identified.
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公开(公告)号：US12016397B2
公开(公告)日：2024-06-25
申请号：US17042496
申请日：2019-03-28
摘要： A response procedure for an aerosol-generating device includes detecting a fall or shock using at least one acceleration value and initiating at least one response procedure using a controller. Acceleration values are provided by at least one accelerometer coupled to the aerosol-generating device. The response procedures may include at least one of: initiating a mechanical change in the aerosol-generating device, initiating a modification to an external device interface, generating a human-perceptible beacon, storing data associated with the fall or shock in persistent or non-volatile memory, initiating a diagnostic routine, monitoring for a lost device condition, and initiating a soft shutdown or restart.
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公开(公告)号：US11965916B2
公开(公告)日：2024-04-23
申请号：US17769142
申请日：2020-10-15
申请人： Safetytest GmbH
发明人： Simon Schulze , Wolfgang Schulze , Dimitar Vergov
CPC分类号： G01R19/10 , G01R27/025 , G01R27/18
摘要： A method for determining the resistive component of the leakage current impedance (Ri50) of a downstream branch to an alternating current network having a live phase (L), a neutral conductor (N), and a protective conductor (PE) conducted by: (a) measuring a differential current ILN between the live phase (L) and the neutral conductor (N); (b) measuring a voltage U between the live phase (L) and the neutral conductor (N) or between the live phase (L) and the protective conductor (PE); (c) correcting a phase shift between the differential current ILN and the voltage U; (d) determining several individual differential current values ILN,i and several individual voltage values Ui, the differential current values ILN,i being phase-corrected with respect to the voltage values Ui; (e) determining the effective power P from the several individual differential current values ILN,I and the several individual voltage values Ui; (f) determining the effective voltage UEff by the voltage values Ui; and (g) determining the resistive component of the leakage current impedance (Ri50).
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