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公开(公告)号：US20220291263A1
公开(公告)日：2022-09-15
申请号：US17197182
申请日：2021-03-10
发明人： Andrew Michael Owen
IPC分类号： G01R23/165
摘要： Methods, devices, and systems for coherent time-gated residual spur characterization and correction in signal analyzers. In some cases, the method includes: displaying a signal on the display of the signal analyzer that is present without an input signal being provided to an input of the signal analyzer; establishing a predetermined amplitude threshold above which energy spikes in the signal being displayed on the display of the signal analyzer are considered spurious; automatically identifying one or more spurious energy spikes in the signal being displayed on the display of the signal analyzer based on the predetermined amplitude threshold; and automatically reducing or removing the one or more spurious energy spikes from the signal being displayed on the display of the signal analyzer. The method can be performed using one or more processors, application specific integrated circuits (ASICs), field-programmable gate array (FPGA), or other circuitry on any suitable signal analyzer.
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公开(公告)号：US20210255250A1
公开(公告)日：2021-08-19
申请号：US17049536
申请日：2019-03-29
发明人： Jan Philipp SCHMIDT
IPC分类号： G01R31/3842 , G01R31/385 , G01R31/389 , G01R31/396 , G01R23/165
摘要： A diagnostic method and a diagnostic system for an electrochemical energy storage cell, and a vehicle including the diagnostic system. An electrical current due to an electrical connection between the energy storage cell and a central load is modulated at a first excitation frequency and is measured centrally. An electrical voltage at the energy storage cell is measured and a first impedance value is determined based on the electrical current and the electrical voltage. Also, a previously-known electrical current due to an electrical connection between the energy storage cell and a predefined cell-individual load is modulated at a second excitation frequency. The electrical voltage occurring at the energy storage cell is measured and a second impedance value is determined based on the previously-known electrical current and the electrical voltage. Diagnostic information is determined and output based on a comparison of the first impedance value with the second impedance value.
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3.发明授权公开(公告)号：US10797625B2
公开(公告)日：2020-10-06
申请号：US16077506
申请日：2017-02-15
申请人： ERAE AMS CO., LTD.
发明人： Dae Ki Ahn , Seung Soo Noh , Shin Deok Kang , Eung Soo Kim , Soo Hwan Song
IPC分类号： H02P6/17 , B60T17/22 , G01P3/46 , H02P6/18 , B60R16/033 , G01R23/165 , G01R31/34 , G01R19/165 , B60T13/74
摘要： A device and method for detecting the number of revolutions of a sensorless electric park brake (EPB) motor. The device for detecting the number of revolutions of a sensorless motor includes: an actuator driving motor used to set and release a parking brake of an EPB system; an electronic control module for controlling the motor, a vehicle battery for supplying power to the motor and the electronic control module; and a main processing unit for receiving an output signal of the electronic control module and estimating the number of revolutions of the motor, wherein the electronic control module further includes a ripple measuring unit for receiving an output signal of the motor and measuring a ripple of the motor.
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公开(公告)号：US10739399B2
公开(公告)日：2020-08-11
申请号：US15939769
申请日：2018-03-29
IPC分类号： G01R31/28 , G01R23/165 , G01R23/02 , H04B1/00 , H04B1/40 , H04B1/3805 , H04L27/00
摘要： A measurement apparatus and method for measurement of a radio frequency (RF) signal, said measurement apparatus comprising a signal input adapted to receive an RF-signal being split into a first measurement signal path and into a second measurement signal path of said measurement apparatus, wherein said first measurement signal path is adapted to measure the split RF-signal within a predefined first frequency band around a predefined measurement frequency, wherein said second measurement signal path is adapted to measure a current frequency at a power maximum of the split RF-signal in a predefined second frequency band, and wherein the RF-signal measured in said first measurement signal path is shifted in the frequency domain depending on the current frequency measured in said second measurement signal path.
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公开(公告)号：US20200025614A1
公开(公告)日：2020-01-23
申请号：US15998918
申请日：2017-02-07
发明人： Sascha Preu
IPC分类号： G01J3/42 , G01J9/04 , G01R23/165
摘要： The invention relates to a device for the spectral analysis of an electromagnetic measurement signal using an optoelectronic mixer, wherein the optoelectronic mixer is designed to generate the electrical superimposition signal by superimposing the electromagnetic measurement signal and a reference signal with at least one known frequency (fo). The device comprises the following features: a signal input for receiving an electrical superimposition signal from the optoelectronic mixer , a low-pass filter, a rectifier, and a read-out unit. The low-pass filter is designed to generate a filtered superimposition signal from the electrical superimposition signal by filtering out frequency portions above an upper cutoff frequency (fG). The rectifier is designed to generate a rectified superimposition signal from the filtered superimposition signal. The read-out unit is designed to determine a match of the known frequency (fo) of the reference signal with the electromagnetic measurement signal based on the rectified overlay signal.
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公开(公告)号：US10447243B2
公开(公告)日：2019-10-15
申请号：US15766369
申请日：2017-12-14
申请人： Sendyne Corporation
发明人： Yannis Tsividis
摘要： A method and apparatus to compensate for distortion of a waveform due to the skin effect in a current shunt. The method includes modeling the complex impedance of the shunt as component complex impedances. By designing a filter corresponding to the component complex impedances, the distortion of a waveform across the shunt may be reversed to provide an accurate replica of the undistorted waveform.
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公开(公告)号：US10197605B2
公开(公告)日：2019-02-05
申请号：US14669232
申请日：2015-03-26
IPC分类号： G01R21/00 , G01R21/06 , G01R21/133 , G01R23/165 , H03L7/099 , H03M1/12 , H03M1/36
摘要： A power metering circuit includes a current input path for receiving an analog current input at a first analog to digital converter; a voltage input path for receiving an analog voltage input at a second analog to digital converter; a multiplier configured to multiply an output of the current input path and the voltage input path; a notch filter configured to receive an output of the multiplier, the notch filter having a stop band based on a line frequency; and a control circuit for setting a sampling frequency of the first analog to digital converter and the second analog to digital converter to a multiple of the line frequency.
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公开(公告)号：US10126339B2
公开(公告)日：2018-11-13
申请号：US14822588
申请日：2015-08-10
IPC分类号： H03H17/04 , G01R23/165 , H03H17/02
摘要： Methods and devices for switching filters and medical apparatuses using the same are described. The method includes: detecting whether or not a frequency range of an input signal is changed from a first frequency range into a second frequency range; if changed, switching from a first filter to a second filter, and taking a sample value of the input signal at a current moment as an input value of the second filter at the current moment and sample values of the input signal at n moments before the current moment as input values of the second filter at the n moments, respectively, and taking output values of the first filter at m moments before the current moment as output values of the second filter at the m moments, to obtain an output value of the second filter at the current moment.
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公开(公告)号：US09958524B2
公开(公告)日：2018-05-01
申请号：US14737229
申请日：2015-06-11
申请人： The Boeing Company
IPC分类号： G01R35/00 , G01R27/06 , H01P5/08 , G01R3/00 , G01R23/165 , G01B21/04 , G01B7/06 , G01N22/00 , G01R23/07
CPC分类号： G01R35/007 , G01B7/085 , G01B21/042 , G01N22/00 , G01R3/00 , G01R23/07 , G01R23/165 , G01R27/06 , H01P5/082
摘要： A probe calibration device that includes a first offset element having a substantially rectangular first aperture. The probe calibration device includes a tuned pass element disposed adjacent to the first offset element. The tuned pass element has a non-rectangular second aperture. The probe calibration device includes a second offset element disposed adjacent to the tuned pass element and on a side opposite the first offset element. The second offset element has a substantially rectangular third aperture. The probe calibration device includes a backing element disposed adjacent to the second offset element. The first offset element, the tuned pass element, the second offset element and the backing element form a cavity.
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公开(公告)号：US20180062680A1
公开(公告)日：2018-03-01
申请号：US15556769
申请日：2016-03-04
申请人： CRFS LIMITED
IPC分类号： H04B1/10 , H04B1/7156 , G01R23/165
摘要： A frequency discriminator is described. The frequency discriminator comprises a power splitter (2) for splitting a signal into a plurality of paths (40, 41, 42, . . . , 4n). At least two of the plurality of paths (41, 42, . . . , 4n) include respective filters (121; 122, . . . , 12n) having different frequency characteristics which are configured to provide respective filtered signals to respective power detectors (161, 162, . . . , 16n. The frequency discriminator comprises an analogue-to-digital conversion section (8) which is configured to receive values of measured powers from the power detectors, to generate digital values of measured powers and to provide the digital values of measured powers to a digital processing section (10). The digital processing section is configured to estimate a value (11) of at least one frequency in the signal in dependence on the digital values, for example the ratio of the digital values, of measured powers and on frequency responses (201, 202, . . . , 20n; FIG. 2) of the filters.
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