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公开(公告)号：US20230296560A1
公开(公告)日：2023-09-21
申请号：US17698263
申请日：2022-03-18
申请人： Hach Company
发明人： David Langley Rick
摘要： An embodiment provides a method for measuring a component of an aqueous sample using square wave voltammetry, including: introducing the aqueous sample to a chamber of a square wave voltammetry apparatus; applying a stimulus voltage step to the aqueous sample, wherein the stimulus voltage comprises a staircase voltage, wherein each step of the staircase voltage defines a group and comprises two or more repeated square wave modulations of equal voltage amplitude; measuring a resultant current output resulting from the stimulus voltage, wherein the measuring comprises square wave voltammetry; and averaging the resultant current output across at least two or more cycles of each group. Other aspects are described and claimed.
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公开(公告)号：US11635454B2
公开(公告)日：2023-04-25
申请号：US16635282
申请日：2017-08-03
申请人： NEC Corporation
摘要： Provided an apparatus that receives time series data from a data storage unit storing time series of sample data or feature values calculated from the sample data, computes a measure indicating change and repetition characteristics of the time series data, based on sample value distribution thereof, selects a state model structure to be used for model learning and estimation, from state models including a fully connected state model and a one way direction state model, based on the measure and stores the selected state model in a model storage unit.
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公开(公告)号：US20230052689A1
公开(公告)日：2023-02-16
申请号：US17875840
申请日：2022-07-28
发明人： Lei Ding , Srinath Mathur Ramaswamy , Dok Won Lee , Steven Howard
摘要： Current sensing techniques. In an example, a current sensing method includes: generating a first magnetic field measurement; generating a second magnetic field measurement; generating a frequency estimate of a current; calculating a root-mean-square (RMS) value of an estimated amplitude of the current; and generating a temperature estimate of an integrated circuit (IC) configured to perform the method. The method also includes generating a first weighting factor and a second weighting factor based on the frequency estimate, the RMS value, and the temperature estimate, the first weighting factor to control amplification of the first magnetic field measurement and the second weighting factor to control amplification of the second magnetic field measurement.
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公开(公告)号：US20220360167A1
公开(公告)日：2022-11-10
申请号：US17490104
申请日：2021-09-30
发明人： Bosheng SUN
摘要： A control circuit for a power factor correction (PFC) circuit, the control circuit includes a multiplier having first, second, and third multiplier inputs and a multiplier output. The control circuit has an adder having first and second inputs and an output. The first input of the adder is coupled to the multiplier output. The control circuit further includes a root mean square (RMS) calculation circuit configured to determine a square of a root mean square of an input sinusoidal voltage. The RMS calculation circuit has an output coupled to the second multiplier input. An input voltage square calculation circuit is configured to determine a square of the input sinusoidal voltage. The input voltage square calculation circuit has an output coupled to the third multiplier input.
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公开(公告)号：US20220341972A1
公开(公告)日：2022-10-27
申请号：US17640504
申请日：2020-02-10
发明人： Yohei CHISHIKI , Koki TATEISHI , Takashi SONODA
摘要： A diagnosis device for diagnosing a diagnosis target machine having a rotary machine on the basis of a measured current during rotation of the rotary machine is provided with: an effective value acquisition unit configured to acquire an effective value of the measured current for each specified number of cycles in a target current waveform which is time transition of the measured current in a first predetermined period; a distribution information calculation unit configured to calculate a target distribution information which represents a distribution state of a plurality of the effective values acquired; and a detection unit configured to perform abnormality detection of the diagnosis target machine on the basis of the calculated target distribution information.
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公开(公告)号：US20220085593A1
公开(公告)日：2022-03-17
申请号：US17533280
申请日：2021-11-23
申请人： Ze Chen
发明人： Boon Lum Lim , Samuel Raj
IPC分类号： H02H1/00 , G01R19/02 , H01H71/04 , H01H83/04 , H01H71/62 , H02H3/04 , G01R19/165 , G01R19/04 , H02H3/16 , H02H3/38 , G01R31/52
摘要： In one example, an arc fault circuit interrupter (AFCI) is provided. The AFCI may include a plurality of current arc signature detection blocks configured to output a plurality of corresponding current arc signatures, and a processor. The processor may be configured to receive each of the plurality of current arc signature from each of plurality of current arc signature detection blocks, respectively, and generate a first trigger signal. The processor may be further configured to assess each of the current arc signatures, determine whether an arc fault exists based on the assessment, and generate the first trigger signal if an arc fault is determined to exist. A method for detecting an arc fault is also provided.
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公开(公告)号：US20210190840A1
公开(公告)日：2021-06-24
申请号：US16722257
申请日：2019-12-20
发明人： Michael A. Wilson , Gary L. Hess
摘要： Systems, methods, and computer program products for sinusoidal nulling are provided. Aspects include transmitting, by a controller, an excitation signal to a first sensor, determining, by the controller, a target harmonic based at least on one or more characteristics of the excitation signal, receiving a return signal from the first sensor, sampling the return signal at a first sample rate based on the target harmonic, and adjusting a phase of the sampled return signal to null the target harmonic amplitude to form an adjusted return signal.
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8.发明申请公开(公告)号：US20200296513A1
公开(公告)日：2020-09-17
申请号：US16819665
申请日：2020-03-16
发明人： Robert J. Littrell , Michael Carfore , Shuwan Xue
IPC分类号： H04R3/06 , H04R17/02 , G01R19/02 , H01L41/113 , H01L41/04
摘要： A device that includes an adaptive acoustic detection circuit and an acoustic sensor device such as a microphone is described. The device includes in addition to the sensor a circuit configured to detect when an input stimulus to the sensor satisfies an adaptive threshold, and further configured to produce a signal upon detection that causes adjustment of performance of the device, wherein the adaptive threshold is a threshold value that varies over time in accordance with detected changes to sound of an environment in which the device is located.
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公开(公告)号：US10775446B2
公开(公告)日：2020-09-15
申请号：US15921519
申请日：2018-03-14
申请人： Noble M. Salisbury
发明人： Noble M. Salisbury
摘要： A directional flow current transducer is used as a transient stray voltage detector including a first transducer providing an output signal indicating the magnitude of stray current carried by a new grounding wire, and a second, separate transducer providing an output signal indicating the direction of the stray voltage (for either direct and/or alternating stray voltages). The new grounding wire might be between an equi-potential plane of a concrete platform for watering livestock and a grounding bus bar for grounding the service bond of the main electrical service panel, at a significant distance from the watering platform. The output of the directional flow current transducer is recorded, stored and analyzed as a function of time. Preferably by allowing comparison with the output of a second directional flow current transducer, the system allows transient, directional and locational stray voltage/stray current problems to be better identified, understood and addressed.
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公开(公告)号：US10664554B2
公开(公告)日：2020-05-26
申请号：US16176156
申请日：2018-10-31
申请人： DAIHEN Corporation
发明人： Akihiro Ohori , Nobuyuki Hattori
IPC分类号： G06F17/18 , G01R21/133 , G01R19/02
摘要： A measurement apparatus is used in cooperation with another equivalent measurement apparatus. Each measurement apparatus includes a change amount calculator for calculating a change amount of measured values, an average value generator for generating a first internal average value based on the change amount, and a communication unit for receiving a second internal average value that was generated by at least one other measurement apparatus. The average value generator generates a third internal average value, using a computation result based on at least the first and second internal average values.
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