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1.发明公开公开(公告)号：US20240230760A1
公开(公告)日：2024-07-11
申请号：US18388439
申请日：2023-11-09
发明人： Heping Qiu , Tongqiu Liu , Ming Yin , Tingting Wang , Hongliang Tian , Guoping Pan , Baoxiang Cen , Longwen Wang , Lan Wang
IPC分类号： G01R31/327 , B66B5/02 , G01R19/257 , H02P3/22
CPC分类号： G01R31/3277 , B66B5/02 , G01R19/257 , H02P3/22
摘要： A device for detecting a function of a contactor, the contactor is configured to short three-phase phase lines of an elevator motor together by closing contacts, the device including: a voltage signal source coupled with the contactor; a voltage detection unit coupled with the three-phase phase lines of the elevator motor; a switching unit arranged between the contactor and the voltage signal source and between the voltage detection unit and the three-phase phase lines, in a detection mode, the switching unit is configured to conduct the voltage signal source to the contactor to provide a voltage detection signal to the three-phase phase lines via the contactor and to conduct the voltage detection unit to the three-phase phase lines, the voltage detection unit being configured to measure voltage of the three-phase phase lines and to output measurement to a control unit.
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公开(公告)号：US12007420B2
公开(公告)日：2024-06-11
申请号：US17435315
申请日：2020-02-28
发明人： Koji Ogawa
IPC分类号： G01R19/257 , G01R19/25 , H03F1/26 , C12M1/34 , G01N27/30
CPC分类号： G01R19/257 , G01R19/2509 , H03F1/26 , C12M1/3407 , G01N27/301 , H03F2200/21 , H03F2200/504
摘要： Provided is a potential measurement device including: a first substrate having read electrodes arranged in a two-dimensional array; and a second substrate on which the first substrate is stacked, in which each of the read electrodes includes at least one or more AD conversion circuits each having independent correspondence to the read electrode, and at least a part of the AD conversion circuits is arranged in a two-dimensional array on the second substrate.
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3.发明公开公开(公告)号：US20240103046A1
公开(公告)日：2024-03-28
申请号：US18371313
申请日：2023-09-21
IPC分类号： G01R17/16 , G01R17/04 , G01R19/00 , G01R19/165 , G01R19/257
CPC分类号： G01R17/16 , G01R17/04 , G01R19/0023 , G01R19/16523 , G01R19/257 , G05F1/461
摘要： A pre-driving stage drives one or more Field Effect Transistors in a power stage driving a load. A method for measuring current flowing in the Field Effect Transistors includes: measuring drain to source voltages of the one or more Field Effect Transistor; and measuring an operating temperature of the one or more Field Effect Transistor. The current flowing in the Field Effect Transistors is measured by: calculating the respective on drain to source resistance at the operating temperature as a function of the measured operating temperature and obtaining the current value as a ratio of the respective measured drain to source voltage over the calculated drain to source resistance at the operating temperature.
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4.发明公开公开(公告)号：US20240044952A1
公开(公告)日：2024-02-08
申请号：US18207216
申请日：2023-06-08
申请人： SIGMASENSE, LLC.
发明人： Phuong Huynh
IPC分类号： G01R19/25 , H03M3/00 , G01R19/257
CPC分类号： G01R19/2509 , H03M3/32 , G01R19/257 , H03M3/462 , H03M3/476
摘要： An impedance sensing circuit includes first and second current sources and first and second bias current sources that are appropriately coupled to first and second resistors. The impedance sensing circuit also includes a comparator that compares a first voltage based on the first terminal of the first resistor to a second voltage based on the first terminal of the second resistor to generate a comparator output signal. Either the comparator output signal or a digital signal based on the comparator output signal operates to regulate the current signals output from the first and second current sources so that the first voltage is same as the second voltage. The comparator output signal and the digital signal is representative of a difference between the first voltage and the second voltage that is based on an impedance difference between the first resistor and the second resistor.
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公开(公告)号：US11852663B2
公开(公告)日：2023-12-26
申请号：US17824505
申请日：2022-05-25
IPC分类号： G01R19/257 , H03M1/66 , G01R31/3835
CPC分类号： G01R19/257 , G01R31/3835 , H03M1/66
摘要： One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.
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公开(公告)号：US11448668B2
公开(公告)日：2022-09-20
申请号：US17016571
申请日：2020-09-10
发明人： Kazuhiro Taguchi , Akihiro Murayama
IPC分类号： G01R19/00 , G01R19/257 , G01R19/165
摘要： According to one embodiment, a current detection circuit includes a current detection part including an operational amplifier configured to compare a first voltage proportional to a load current with a second voltage proportional to a detection current. The current detection part is configured to output the detection current. The current detection circuit includes an adjustment part configured to generate data in accordance with a result of comparing a monitor voltage proportional to the detection current with a reference voltage, and to adjust an input offset of the operational amplifier.
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公开(公告)号：US11372032B2
公开(公告)日：2022-06-28
申请号：US15717219
申请日：2017-09-27
IPC分类号： G01R19/257 , H03M1/66 , G01R31/3835
摘要： One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.
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公开(公告)号：US11368011B2
公开(公告)日：2022-06-21
申请号：US16944176
申请日：2020-07-31
申请人： WUHAN UNIVERSITY
发明人： Yigang He , Jianbo Zhou , Hui Zhang , Liulu He , Weibo Yuan , Yi Ruan , Bing Li
IPC分类号： G01R19/25 , G01R19/252 , G01R19/255 , G01R19/257 , G01R31/327 , H02H3/05
摘要： An intermediate relay maloperation preventing device and method based on an improved recursive wavelet algorithm is provided. The device includes a power supply module, a voltage sampling circuit, an analog-to-digital conversion module, a DSP chip, and a relay maloperation signal shielding module. The voltage sampling circuit is connected to the analog-to-digital conversion module. The analog-to-digital conversion module is connected to the DSP chip. The DSP chip is connected to and controls a relay signal control module. The voltage sampling circuit collects a voltage. An improved recursive wavelet is used to extract a voltage feature. As such, identification of a fault signal and a normal signal is achieved, and real-time fault monitoring is accomplished. The detection method may be easily implemented, exhibits good filtering performance and anti-interference capability, delivers high detection accuracy, and may accomplish real-time online monitoring of intermediate relay faults.
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公开(公告)号：US20220099712A1
公开(公告)日：2022-03-31
申请号：US17033505
申请日：2020-09-25
申请人： Apple Inc.
发明人： Michele De Fazio , Shawn Searles
IPC分类号： G01R19/15 , G01R19/257
摘要： A current measurement circuit is disclosed. The current measurement circuit includes first and second circuit branches coupled to a circuit node through which current is to be measured. During a first period, the first circuit branch converts the current into a first voltage. During a second period, the second circuit branch converter the current into a second voltage. An analog-to-digital converter is configured to convert the first and second voltages into digital values indicative of the measured current. A control circuit is configured to alternately select one of the first and second branches during the generation of the digital values.
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公开(公告)号：US11249117B2
公开(公告)日：2022-02-15
申请号：US16530418
申请日：2019-08-02
IPC分类号： G01R19/00 , G01R19/257
摘要： An autoranging ammeter with fast dynamic response allows improved dynamic measurement of rapidly changing direct electrical currents. The ammeter utilizes a low-cost dual threshold comparator mechanism coupled with an analog-to-digital converter and digital processing to rapidly select the appropriate current shunt resistor.
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