By Frequency Sensitive Or Responsive Detection Patents (Class 324/520)
  • Patent number: 11621884
    Abstract: A test instrument connectable to a cable television (CATV) network to provide a high resolution time domain reflectometry (TDR) in a fault location measurement is disclosed. The test instrument may have a port connectable to a test point in the CATV network. The test instrument may also have a processing circuit to perform a calibration measurement and a fault location measurement by transmitting frequency-chirped probe pulses into a closed calibration circuit within the test instrument, and receiving return signals at an analog-digital converter in the test instrument. The processing circuit may resample the calibration measurement and the fault location measurement at a high sampling rate, cross-correlate the fault location with the calibration measurement to generate a cross-correlation TDR waveform, and generate a new TDR waveform using a refinement processing technique to remove echoes from the cross-correlation TDR waveform.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: April 4, 2023
    Inventors: Daniel Keith Chappell, Loren Eggert
  • Patent number: 11588323
    Abstract: A fault isolating device for use in a microgrid disconnected from a main power grid includes a voltage meter for detecting a voltage anomaly indicative of an electrical fault, a timer for establishing a time window that begins and ends a predetermined time after a voltage anomaly is detected, a switch that is opened at the start of the time window, and a microcontroller that determines whether to leave the switch open to isolate a faulted portion of the microgrid or to close the switch. A plurality of fault isolating devices can be distributed throughout a microgrid to isolate a faulted branch or faulted branches of an islanded microgrid without interfering with normal fuse operation when the microgrid is connected to the main power grid.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: February 21, 2023
    Assignee: Commonwealth Associates, Inc.
    Inventor: Sebastien C. Billaut
  • Patent number: 11581733
    Abstract: The present disclosure provides techniques for estimating network states using asynchronous measurements by leveraging network inertia. For example, a device configured in accordance with the techniques of the present disclosure may receive electrical parameter values corresponding to at least one first location within a power network and determine, based on the electrical parameter values and a previous estimated state of the power network, an estimated value of unknown electrical parameters that correspond to a second location within the power network. The device may further cause at least one device within the power network to modify operation based on the estimated value of the unknown electrical parameters. The leveraging of network inertia may obviate the need for probabilistic models or pseudo-measurements.
    Type: Grant
    Filed: November 12, 2020
    Date of Patent: February 14, 2023
    Assignees: Alliance for Sustainable Energy, LLC, The Regents of the University of Colorado, a body corporate
    Inventors: Guido Cavraro, Andrey Bernstein, Emiliano Dall'Anese
  • Patent number: 11249137
    Abstract: A diagnostic method of switchgear and a device of switchgear that allow regularly grasping a state with high accuracy with a simple configuration is provided. The diagnostic method of switchgear includes: obtaining signals from an acceleration sensor mounted to a switchgear and a load current flowing through the switchgear; determining a frequency to be focused from a spectrum analysis result of the signals from the acceleration sensor in an advance preparation phase of diagnosis of the switchgear, generating learning data using at least the frequency and the load current as feature values; and regularly diagnosing the state of the switchgear from the feature values obtained during diagnosis and the learning data during the diagnosis of the switchgear.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: February 15, 2022
    Assignee: Hitachi, Ltd.
    Inventors: Masaru Tatemi, Toshiaki Rokunohe, Masanori Otsuki, Akira Takahama
  • Patent number: 11177055
    Abstract: A system for detecting water trees in branching underground electrical cables includes a pulse generator configured to inject a pulse into a first underground cable that branches into a second underground cable and a third underground cable. The system includes a first sensor associated with the first cable, a second sensor associated with the second cable, and a third sensor associated with the third cable. The system includes a control device configured to obtain a first, second, and third signal associated with the first, second and third sensors, respectively. The control device determines a lead-lag relationship between the second and third signals and determines presence of a water tree within at least one of the second and third cable based on the lead-lag relationship. When presence of a water tree is determined, the control device generates a control action associated with repairing or replacing the second and/or third cable.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: November 16, 2021
    Assignee: Savannah River Nuclear Solutions, LLC
    Inventor: Klaehn W. Burkes
  • Patent number: 11169188
    Abstract: An example device includes at least one processor configured to receive electrical parameter values corresponding to at least one first location within a power network. The at least one processor is further configured to determine, using matrix completion and based on the at least one electrical parameter value, an estimated value of at least one unknown electrical parameter. The at least one unknown electrical parameter corresponds to a second location within the power network. The at least one processor is also configured to cause at least one device within the power network to modify operation based on the estimated value of the at least one unknown electrical parameter.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: November 9, 2021
    Assignee: Alliance for Sustainable Energy, LLC
    Inventors: Andrey Bernstein, Yingchen Zhang, Andreas Joachim Schmitt
  • Patent number: 11165451
    Abstract: The present disclosure provides a method for detecting presence of a bidirectional amplifier. At least one radio signal is transmitted by a detection device, the at least one radio signal being a two-tone stimulus. The at least one transmitted radio signal is received by the bidirectional amplifier. The radio signal is processed by the bidirectional amplifier, thereby amplifying the radio signal while generating third order or higher intermodulation products such that an amplified radio signal is generated that includes the third order or higher intermodulation products. The amplified radio signal is transmitted. The amplified radio signal is received by the detection device. The amplified radio signal is analyzed by the detection device, thereby obtaining detection results. Further, a system for detecting presence of a bidirectional amplifier is shown.
    Type: Grant
    Filed: October 20, 2020
    Date of Patent: November 2, 2021
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Paul Denisowski
  • Patent number: 10942206
    Abstract: In one embodiment, the PIM load includes a variable attenuator; a detector configured to detect a signal characteristic associated with a signal received by the PIM load; and a controller configured to control the variable attenuator based on output from the detector.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: March 9, 2021
    Assignee: Nokia Shanghai Bell Co., Ltd.
    Inventors: Paul A. Carney, Gordon M. Siebert, Charles J. Grillo
  • Patent number: 10908972
    Abstract: Disclosed herein are methods, systems, and devices for system event detection associated with power grid components. Methods include detecting, at a plurality of sensors, emissions from a system event associated with at least one winding of a power component. Methods also include determining, using a processor, a plurality of event parameters based, at least in part, on measurements made by the plurality of sensors, the event parameters identifying arrival times of the emissions at each of the plurality of sensors. Methods further include generating, using the processor, an output identifying an estimate of a position of the system event within the power component, the estimate being generated based, at least in part, on the arrival times identified by the plurality of event parameters.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: February 2, 2021
    Inventors: Kesheng Wu, Alex Sim, Jonathan Wang, Seongwook Hwangbo
  • Patent number: 10887027
    Abstract: A dynamic dual-port passive intermodulation reference signal generator for calibrating an intermodulation testing device includes: a power allocation coupling network, a non-linear device located under a biasing condition, and a voltage modulation module. Extraction of a carrier signal is performed through a power distribution coupling network; the carrier signal as extracted excites a non-linear device to generate an intermodulation signal; this part of signal, together with the excitation signal, is coupled back to two ports of the generator by the same power distribution coupling network, thereby forming reflected and transmitted reference intermodulation levels as reference sources for calibrating the intermodulation testing apparatus.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: January 5, 2021
    Inventors: Xiong Chen, Yongning He
  • Patent number: 10877138
    Abstract: In the method for transmitting data representing an ultrasonic measurement signal of an ultrasonic measuring device, in particular for a vehicle, from a transmitter to a receiver a digitized analog ultrasonic measurement signal is provided in the transmitter. On the transmitter side the ultrasonic measurement signal is sampled at a multiple of its frequency and divided into individual successive blocks of sampling values. The sampling values of the sampled ultrasonic measurement signal are transformed in blocks into the frequency range. Those frequency portions of the spectrum whose amplitude is smaller than a presettable threshold value, or the frequency portions of the spectrum above an upper frequency limit value and/or below a lower frequency limit value are removed. The amplitude range covered by the remaining frequency spectrum is scaled by a scaling factor for further reduction of the data. The data of each block with the scaling factor assigned to the respective block are transmitted to the receiver.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: December 29, 2020
    Assignee: Elmos Semiconductor SE
    Inventor: Egbert Spiegel
  • Patent number: 10782321
    Abstract: An excitation core includes an annular strip-shaped magnetic substance, in which both ends of the strip-shaped magnetic substance are overlapped in a thickness direction and are in contact with one another. A sensor head includes: this excitation core and a magnetism collecting body. The magnetism collecting body includes a strip-shaped first magnetism collector and a strip-shaped second magnetism collector, the first magnetism collector having both ends thereof in contact with both ends of the second magnetism collector to form the annular magnetism collecting body, the magnetism collecting body being disposed on an inside or an outside of the reinforcing body.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: September 22, 2020
    Assignees: Yokogawa Electric Corporation, YOKOGAWA TEST & MEASUREMENT CORPORATION
    Inventors: Takanobu Shinagawa, Kiyoshi Yokoshima
  • Patent number: 10666907
    Abstract: Provided are a gas insulated switchgear (GIS) internal video monitoring system and a GIS internal video monitoring method. The GIS internal video monitoring system includes a GIS video sensor installed on a GIS enclosure and configured to acquire an open/close state of a GIS internal conductor in a real time manner, an intelligent power source module, a video server, and a video monitoring background system configured to control the intelligent power source module to supply power to the video sensor, where the GIS video sensor is connected with the video monitoring background system through the video server.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: May 26, 2020
    Assignee: China XD Electric Co., Ltd.
    Inventors: Shijun Bai, Yongqiang Zhang, Jizhou Duan, Haiqiang Wang, Rui Ye
  • Patent number: 10585133
    Abstract: A single-ended traveling wave fault location estimation is calculated using this disclosure, and a confidence level is determined based on available independent fault location estimations. Hypothesis are calculated based on traveling wave times and values, wherein the values indicate a polarity that is the same as the first received traveling wave. Hypothesis are then compared against results of other fault location estimations, and confidence levels assigned accordingly. The fault location is then calculated and displayed based on the hypothesis and confidence levels.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: March 10, 2020
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Armando Guzman-Casillas, Yajian Tong, Mangapathirao Venkata Mynam, Bogdan Z. Kasztenny
  • Patent number: 10579085
    Abstract: A power distribution unit and a fault detecting method applied in the power distribution unit are disclosed herein. The power distribution unit includes an input terminal, an insulation fault detection circuit and a processing circuit. The input terminal is electrically coupled to a positive power line and a negative power line, and configured to receive a high voltage direct current (HVDC) voltage. The insulation fault detection circuit is configured to detect an insulation resistance value between a ground terminal and the positive power line or the negative power line. The processing circuit is configured to output a warning signal according to the insulation resistance value.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: March 3, 2020
    Inventors: Chih-Chiang Chan, I-Chieh Li
  • Patent number: 10533978
    Abstract: A component monitoring system structured to monitor circuit breaker assembly component characteristics is provided. The component monitoring system includes a record assembly, a number of vibration sensor assemblies, a comparison assembly, and an output assembly. The record assembly includes selected nominal data for a selected circuit breaker component. The vibration sensor assembly is structured to measure a number of actual component characteristics for a substantial portion of the circuit breaker assembly and to transmit actual component characteristic output data. The comparison assembly is structured to receive an electronic signal from said record assembly and said sensor assemblies, to compare each sensor assembly actual component characteristic output data to said selected nominal data and to provide an indication signal as to whether said sensor assembly output data is acceptable when compared to the selected nominal data. The output assembly includes a communication assembly and an output device.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: January 14, 2020
    Inventors: James Jeffery Benke, Koustubh Dnyandeo Ashtekar, Li Yu, Jiong Chen, Fangji Wu, He Yang, Wilbert deVries
  • Patent number: 10535987
    Abstract: An arc detection apparatus is provided. The arc detection apparatus detects an arc using an electrical energy, eliminates the possibility of a false arc detection caused by noise due to a power environment, increases accuracy of arc detection, and prevents fires that may occur in a home or an industrial site due to an arc occurrence.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: January 14, 2020
    Assignee: KEPID AMSTECH CO., LTD.
    Inventors: Jun Bae Lee, Kyeong Min Hong, Jun Hee Cho
  • Patent number: 10522430
    Abstract: A semiconductor device includes first and second pads separated from each other, first and second test elements connected to the first and second pads and connected to each other in parallel between the first and second pads, a first diode connected to the first test element in series, and a second diode connected to the second test element in series.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: December 31, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Zhan Zhan, Hwa Sung Rhee, Myung Jo Chun
  • Patent number: 10505646
    Abstract: Systems and methods for testing a wireless device having a beamforming circuit are disclosed herein. An exemplary system includes a shielded test enclosure, a wireless channel emulator, and a test instrument. The shielded test enclosure provides a cable-free connection between the wireless device and the wireless channel emulator, thereby allowing for testing of various types of wireless devices, particularly those that do not have radio-frequency (RF) connectors. The shielded test enclosure is smaller in size and less-expensive than traditional multi-probe anechoic chambers. In one example application, the shielded test enclosure is used to house a multiple-input multiple-output (MIMO) antenna array of a wireless device and a probe antenna array. The probe antenna array is coupled to the wireless channel emulator and used to receive signals from MIMO antenna arrays of various sizes thereby eliminating the need to uniquely tailor the probe antenna array to any specific MIMO antenna array.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 10, 2019
    Assignee: Keysight Technologies, Inc.
    Inventors: Pekka Kyosti, Jukka Kyrolainen
  • Patent number: 10484938
    Abstract: An electronic device includes a first connection interface and a second connection interface configured to be electrically connected to at least one host system, a transmission control device, a data access device, and a channel-detecting device. The transmission control device includes a first communication channel electrically connected to the first connection interface and a second communication channel electrically connected to the second connection interface. The transmission control device determines a connection state according to impedance information and provides corresponding operation functions for at least one host system according to the connection state. The data access device is electrically connected to the transmission control device, and is configured to receive data transmitted by the host system. The channel-detecting device detects the impedance information between one or both of the first connection interface and the second connection interface and the at least one host system.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: November 19, 2019
    Assignee: SILICON MOTION, INC.
    Inventor: Liang-Hsuan Lu
  • Patent number: 10393790
    Abstract: The present disclosure relates to a method for testing connectivity. The method is applied to an electronic equipment which is disposed include two test units (e.g. network interface controller, RJ-45 connector) and a network transformer. The test unit couple to the network transformer so that can send a high frequency test signal or a low frequency test signal to the network transformer respectively. When the test unit receives a low frequency response signal, it means correspond internal circuitry of the network transformer does not have a open circuit fault. When the test unit does not receive a high frequency response signal, it means correspond pins of the network transformer does not have a short circuit fault.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: August 27, 2019
    Assignees: Inventec (Pudong) Technology Corporation, INVENTEC CORPORATION
    Inventors: Hsueh-Chih Lu, Lien-Feng Chen
  • Patent number: 10365316
    Abstract: A method for monitoring partial discharges in an electric power transmission system includes the steps of: detecting electric pulses from a component of the electric power transmission system, repeating a battery of different tests adapted to provide each a result indicative of partial discharge activity, the tests being continuously performed in succession one after the other in a preset period of time, each including a set of operations of acquisition and evaluations of the detected electrical pulses, and differing each other for a plurality of different combinations of values taken by test parameters used for executing the acquisition and evaluation operations; analyzing the results obtained with time by the batteries of tests executed at different execution times in the present period of time; and generating an alarm depending on the outcome of the analysis step.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: July 30, 2019
    Assignee: PRYSMIAN S.p.A
    Inventors: Lluis-Ramon Sales Casals, Joaquin Del Rio Fernandez, Rafael Lara, Antonio Manuel Lazaro
  • Patent number: 10310000
    Abstract: There is provided a partial discharge sensor including a first flange formed at an end of a first conductor tube, a second flange formed at an end of a second conductor tube, a first insulating spacer sandwiched between the first flange and the second flange, a plurality of holes passing through the first flange, the first insulating spacer, and the second flange, at least two first conductors each passing through one of the plurality of holes to be disposed with electrically connected to the first flange and the second flange, a second conductor passing through one of the plurality of holes to be disposed with electrically connected to the second flange, and a second insulating spacer that insulates the second conductor and the first flange from each other.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: June 4, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Yanagi, Toru Fukasawa, Takashi Ito
  • Patent number: 10261119
    Abstract: A smart sensor network for power grid health monitoring includes a plurality of spaced sensors that are magnetically coupled to the power transmission line to be monitored. The sensors include a signal injection unit and a signal sensing unit. As such, one of the sensors acts to inject, via its signal injection unit, a high frequency signal through the magnetic coupling into the power transmission line, while sensors on either side of the signal injecting sensor act to block the injected signal, which is then detected by the signal sensing unit of the injecting sensor, and is used to measure the impedance of the power transmission line segment being analyzed. Based on the difference between a pre-measured impedance of the power transmission line being monitored and the actual impedance value of the power transmission line being measured by the sensor, the health of the power line can be obtained.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: April 16, 2019
    Assignee: The University of Akron
    Inventors: Amir Mehdi Pasdar, Yilmaz Sozer, Jose Alexis De Abreu-Garcia
  • Patent number: 10243343
    Abstract: Method and system allowing more accurate detection and identification of unwanted arcing include novel processing of signal voltage representing recovered power-line current. In one implementation, arc-faults are detected based on numerical analysis where individual cycles of line voltage and current are observed and data collected during each cycle is processed to estimate likelihood of presence of arc-event within each individual cycle based on pre-defined number of arc-events occurring within pre-defined number of contiguous cycles.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: March 26, 2019
    Assignee: Hubbell Incorporated
    Inventors: William Vernon Miller, III, Gary Michael Miller
  • Patent number: 10237001
    Abstract: A method for intermodulation measurement for locating points in a signal transmission path for a high-frequency signal that are faulty with regard to HF transmission properties of the signal transmission path, by generating a first HF signal uTest, having a carrier frequency f1 and a digital signal uCode modulated thereon; generating a second HF signal u2 having a frequency f2; introducing the first HF signal uTest and the second HF signal u2 into the signal transmission path at a predetermined introduction point; receiving an intermodulation product, which is generated in the signal transmission path from the first HF signal and the second HF signal at at least one faulty point, as an intermodulation product signal uRX; recovering a digital signal udemod from uRX; and determining a time shift tx between the digital signal uCode and the recovered digital signal udemod. The invention further relates to a measuring device for performing this method.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: March 19, 2019
    Assignee: Rosenberger Hochfrequenztechnik GmbH & Co. KG
    Inventors: Martin Schwab, Christian Entsfellner, Benjamin Kaindl
  • Patent number: 10228403
    Abstract: Various devices, systems and methods are disclosed where a noise signal component of a sensor signal is used to obtain information about a sensor device. A device may include an evaluation circuit that is configured to receive a sensor signal having a noise signal component, and the evaluation circuit is further configured to evaluate the noise signal component to obtain information about a sensor device generating the sensor signal.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: March 12, 2019
    Assignee: Infineon Technologies AG
    Inventors: Thomas Zettler, Dirk Hammerschmidt, Friedrich Rasbornig, Wolfgang Scheibenzuber, Wolfgang Scherr
  • Patent number: 10228406
    Abstract: In order to determine the occurrence of a fault, notably transient, in an electrical distribution network, a method and a device are developed based on the determination of the frequency (f) of the current signal circulating in a phase of the network. Notably, the difference between the determined frequency (f) and the natural frequency (f0) of the network is compared to a threshold.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: March 12, 2019
    Inventors: Guillaume Verneau, Nathalie Baumes
  • Patent number: 10224155
    Abstract: Methods, systems, and apparatus for circuit breakers with integrated safety, control, monitoring, and protection features. In one aspect, a circuit breaker includes, an input and an output, a switch coupled between the input and the output, a sensor configured to measure the current flowing from the input to the output, and a control system coupled to the sensor and the switch, wherein the control system is configured to perform operations including comparing a rate of change of the current measured by the sensor to a threshold rate of change of current, determining that the rate of change of the current measured by the sensor exceeds the threshold rate of change of current for at least a predetermined period of time, and as a consequence of determining that the rate of change of current exceeds the threshold rate of change, opening the switch, thereby disconnecting the input from the output.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: March 5, 2019
    Assignee: Google LLC
    Inventors: Jyoti Sastry, Anand Ramesh, Gregory E. Leyh, Ronald Scott Collyer, Arunava Majumdar, Ankit Somani
  • Patent number: 10193642
    Abstract: Described are methods and circuits for margin testing digital receivers. These methods and circuits prevent margins from collapsing in response to erroneously received data, and can thus be used in receivers that employ historical data to reduce intersymbol interference (ISI). Some embodiments detect receive errors for input data streams of unknown patterns, and can thus be used for in-system margin testing. Such systems can be adapted to dynamically alter system parameters during device operation to maintain adequate margins despite fluctuations in the system noise environment due to e.g. temperature and supply-voltage changes. Also described are methods of plotting and interpreting filtered and unfiltered error data generated by the disclosed methods and circuits. Some embodiments filter error data to facilitate pattern-specific margin testing.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: January 29, 2019
    Assignee: Rambus Inc.
    Inventors: Andrew Ho, Vladimir Stojanovic, Bruno W. Garlepp, Fred F. Chen
  • Patent number: 10126346
    Abstract: Method and system for implementing multiple user-initiated self-test sequences in a multifunction circuit breaker device uses a single test input to initiate both arc fault and ground fault testing while at the same time allowing the multifunction circuit breaker device to continue detecting actual arc faults and ground faults in near real time. Having one test input for multiple self-test sequences significantly reduces the number of mechanical and electrical components required by the circuit breaker device. The multifunction circuit breaker device also distinguishes between a simulated ground fault and an actual ground fault and avoids automatically tripping upon successful completion of the ground fault self-test sequence unless and until all self-test sequences have passed. In this way, users are not given a potentially incorrect indication that the multifunction circuit breaker device is working properly.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 13, 2018
    Assignee: Schneider Electric USA, Inc.
    Inventors: Randall J. Gass, Issa V. Drame
  • Patent number: 10101378
    Abstract: An apparatus and a method for detecting a dielectric breakdown in an eco-friendly vehicle are provided. The apparatus includes a measurer that is configured to measure resistance values of insulation resistors disposed across a high voltage battery and a controller that is configured to measure a voltage applied to the insulation resistor using the measurer and analyze a pattern of the measured voltage to detect a dielectric breakdown portion.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: October 16, 2018
    Assignee: Hyundai Motor Company
    Inventors: In Sung Jung, Hee Sung Moon
  • Patent number: 10090939
    Abstract: An integrated circuit is described herein. According to one or more embodiments, the integrated circuit includes a local oscillator with a voltage-controlled oscillator (VCO) that generates a local oscillator signal. Further, the integrated circuit includes a frequency divider coupled to the VCO downstream thereof. The frequency divider provides a frequency-divided local oscillator signal by reducing the frequency of the local oscillator signal by a constant factor. A first test pad of the integrated circuit is configured to receive a reference oscillator signal. Further, the integrated circuit includes a first mixer that receives the reference oscillator signal and the frequency-divided local oscillator signal to down-convert the frequency-divided local oscillator signal.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: October 2, 2018
    Inventors: Oliver Frank, Guenter Haider, Jochen O. Schrattenecker
  • Patent number: 10078105
    Abstract: A unique electrical system includes a first electrical component and a second electrical component. A conductor electrically couples the first electrical component with the second electrical component. A sensor is constructed to sense an AC power flow in the conductor and output an AC signal proportional to the AC power flow. A band-pass filter is in electrical communication with the sensor and constructed to receive and filter the AC signal and to generate an AC voltage proportional on the AC signal. A controller is in electrical communication with the band-pass filter, and is operative to receive and sample the AC voltage. The controller is configured to execute program instructions to sum sequential AC voltage values received from the band-pass filter over a sample time period, and to determine whether an arc fault has occurred based on the summed AC voltage values.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: September 18, 2018
    Assignee: ABB Schweiz AG
    Inventors: Patrick Erik Schneider, Jing Xu
  • Patent number: 10048310
    Abstract: A partial discharge signal processing device of the present invention is provided with: a partial discharge signal receiving unit disposed inside a high voltage electric machine device; a partial discharge signal processing unit; and a coaxial cable connecting the partial discharge signal receiving unit and the partial discharge signal processing unit. In addition, the partial discharge signal receiving unit comprises an electromagnetic wave receiving unit that receives electromagnetic waves generated by partial discharge. Further, the partial discharge signal processing unit comprises: a detection unit that detects a partial discharge signal transmitted through the coaxial cable; a band limiting unit that limits the frequency bandwidth of the partial discharge signal; an attenuation amount correction unit that corrects an attenuated partial discharge signal; and a signal output unit that outputs, to an external device, the corrected partial discharge signal.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: August 14, 2018
    Inventor: Hiroshi Sako
  • Patent number: 10051117
    Abstract: In accordance with embodiments disclosed herein, there are provided apparatus, systems, and methods for identifying cable-level faults in a copper plant of a DSL system. For example, such means may include identifying a group of Digital Subscriber Lines (DSL lines) within a common cable; determining a baseline of physical line characteristics for each of the DSL lines in the group; collecting current physical line characteristics for each of the DSL lines in the group; determining a physical line characteristics delta for each of the DSL lines in the group by comparing the current physical line characteristics to the baseline of physical line characteristics for each of the respective DSL lines; and indicating a defect in the common cable based on a quantity of the DSL lines in the group for which the respective DSL line's physical line characteristics delta exceeds a threshold. Other related embodiments are disclosed.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: August 14, 2018
    Inventors: Arash Zahedi, Ehsan Ardestanizadeh, Mehdi Mohseni
  • Patent number: 9995774
    Abstract: Determining a property of an electrical signal at a node instant at the current instant (INSTC); determining a previous function indicative of a property of the signal at the node at a previous instant; determining an error function in a previous frequency estimation at the node at a previous instant; determining a first current function indicative of the property of the signal at the node at INSTC in accordance with the determined property, the previous function, and the error function; receiving, from another node, a second current function indicative of a property of an electrical signal at the at least one other node at INSTC; combining the first current function and the second current function to produce a current combined function (CCF) indicative of a property of the signal at the node at INSTC; and estimating a current frequency of the signal at the node in accordance with the CCF.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: June 12, 2018
    Inventors: Danilo Mandic, Yili Xia, Dahir Dini
  • Patent number: 9991855
    Abstract: In a semiconductor device, received signals of different frequency bands are input selectively to low noise amplifiers. A plurality of primary inductors are coupled between differential output nodes of the respective low noise amplifiers. A secondary inductor is provided commonly for the primary inductors, and magnetically coupled to the primary inductors. A demodulator converts a received signal transmitted from one of the primary inductors to the secondary inductor by electromagnetic induction, into a signal of a low frequency.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 5, 2018
    Inventor: Masakazu Mizokami
  • Patent number: 9949154
    Abstract: A test system for testing a plurality of devices under test (DUTs) is provided. The test system comprises a test signal generator configured to generate test signals to be transmitted to the DUTs, wherein the test signals comprise at least one synchronization signal. The test signal generator is configured to broadcast the at least one synchronization signal to the DUTs. It is thereby possible to simultaneously test more than one DUT.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: April 17, 2018
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Thomas Lutz, Jens Volkmann, Franz Obermayr
  • Patent number: 9869709
    Abstract: An electric arc detection device samples first, second and third filterings of a signal in a current window and in another window. A correlation is determined between first filtering samples of the current and the other window, a correlation is determined between second filtering samples of the current and the other window, and a correlation is determined between third filtering samples of the current window and the other window. An arc is then detected as a function of the correlations.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: January 16, 2018
    Inventors: Zakaria Belhaja, Simon Tian, Clement Zeller
  • Patent number: 9863987
    Abstract: A passive intermodulation (“PIM”) distortion test apparatus includes a housing, hammering elements disposed within the housing, each hammering element including a moveable striking member, a strike plate positioned above the hammering elements, where a bottom surface of the strike plate is positioned at a distance above the hammering elements such that the moveable striking members of the hammering elements impact the strike plate when moved into their activated positions, and a retaining member that is configured to hold a device under test on a top surface of the strike plate while a PIM distortion test is performed on the device under test.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: January 9, 2018
    Assignee: CommScope Italy S.r.l.
    Inventors: Riccardo Massa, Vito Caggiano, Gianluca Ratti
  • Patent number: 9856119
    Abstract: Method for determining the overall length (GL) of a jib (1, 4) of a crane in a wear-free manner, characterized in that a signal is coupled in at a first point (2, 5) of the jib (1, 4) and is coupled out at a second point (3, 6) of the jib (1, 4), the overall length (GL) being determined from the time required for the signal to go from the first point (2, 5) to the second point (3, 6).
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: January 2, 2018
    Inventor: Robert Tordy
  • Patent number: 9851324
    Abstract: A sensing apparatus includes a probe and a sensing module. The sensing module includes a material sensing circuit, an operation unit and a signal output circuit. The sensing module generates a frequency sweep signal and sends the frequency sweep signal to the probe to sense a status of a material. The frequency sweep signal is a plurality of signals having different frequencies from each other in a predetermined frequency range. When the frequency sweep signal touches the material, an equivalent capacitance of the material is utilized to generate a reflected signal. The material sensing circuit receives the reflected signal and sends the reflected signal to the operation unit. The operation unit operates the reflected signal to generate a waveform signal to determine the status of the material. The operation unit utilizes an impedance spectrum to determine the status of the material.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: December 26, 2017
    Assignee: Finetek Co., Ltd.
    Inventors: Yin-Lun Huang, I-Chu Lin, Chao-Kai Cheng, Yi-Liang Hou
  • Patent number: 9846188
    Abstract: A method for detecting failures in electrical cable assemblies is provided. A cable test instrument obtains frequency domain data representing electrical characteristics of a cable link under test. A number of connectors in the cable link under test is determined based on the obtained frequency domain data. An estimated location of each of the connectors along the length of the cable link under test is determined by the cable test instrument. The connectors are ranked in accordance with their respective contribution to detected failures in the cable link under test.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: December 19, 2017
    Assignee: Fluke Corporation
    Inventor: Michael Imhof
  • Patent number: 9771823
    Abstract: A method of controlling a power generation system following a transient grid event, and a system and controller to control the power generation system are described. The method includes sensing a rate of change of electrical frequency at terminals of a generator, determining a rate of change of shaft line acceleration, and identifying the transient grid event based on the rate of change of shaft line acceleration. The method also includes triggering an action to recover from the transient grid event when the rate of change of electrical frequency exceeds a first specified value and the rate of change of shaft line acceleration exceeds a second specified value for a specified duration.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: September 26, 2017
    Assignee: General Electric Company
    Inventor: Sreedhar Desabhatla
  • Patent number: 9739821
    Abstract: In a method for detection of an arc in a current path of a converter arrangement (2) for converting a DC input power to an output power, an arc is detected by sensing the current (4) in the current path by means of a current transformer (11), filtering the current signal (4?) with an analog band pass filter (14), converting the analog filtered current signal (4?) into a digital current signal (4??), determining the harmonic content (19) of the digital current signal (4??) and then deciding whether an arc exists if the harmonic content (19) exceeds a threshold, where the threshold is determined at the beginning as a multiple of the average harmonic content during a certain period of time of the current signal.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: August 22, 2017
    Inventors: Christian Krumpholz, Zoran Radakovic, Nikola Georgijevic, Srdjan Srdic
  • Patent number: 9743206
    Abstract: A minimum level for a stimulation signal used in room correction processing is determined by measuring background noise. The stimulation signal is repeated a number of times and resulting responses are recorded. The recording responses are averaged, and the average is subtracted from each recorded response to obtain the background noise present in each recorded response. A stimulation signal to background noise ratio is computed from the stimulation signal and background noise and compared to an SNR threshold to determine if the stimulation signal level is sufficient to support the room correction processing. The background noise may be AC hum introduced electronically into the response signal, acoustic noise introduced by AC ventilation systems or noise emitting devices (refrigerators, etc), and it may be structure-born noise introduced by shaking the microphone, e.g. a bus drives by, shaking the floor the microphone is standing on.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: August 22, 2017
    Inventor: Jeffrey Clark
  • Patent number: 9720025
    Abstract: In monitoring an isolation of an ungrounded power grid an AC voltage source is connected to the power grid via at least one test resistor. A test signal with a periodic continuous voltage course with regard to ground and with a frequency is applied to the power grid by means of the AC voltage source. A leakage current flowing due to the test signal is measured; and an ohmic isolation resistance is determined from the leakage current. The frequency of the test signal is varied such that an active current part of the leakage current keeps a predetermined recommended value at varying leakage capacitances of the power grid. This provides for a desired level of accuracy at maximum speed of isolation or ground fault detection.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: August 1, 2017
    Assignee: SMA Solar Technology AG
    Inventors: Dirk Hermeling, Reinhard Lehmann
  • Patent number: 9716379
    Abstract: A circuit interrupter that includes a passive integration channel structured to receive an output signal from a di/dt current sensor and generate a first signal output based on the output signal, and an active integration channel structured to receive the output signal from the di/dt current sensor and generate a second signal output based on the output signal that is proportional to the primary current received by the di/dt current sensor. Circuit protection functionality is provided based on the first signal output responsive to the primary current being determined to be greater than a threshold level, current metering and circuit protection functionality is provided based on the second signal output responsive to the primary current being determined to be less than or equal to the threshold level, and a seed current value is provided to the active integrator based on the first signal output.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: July 25, 2017
    Inventors: Theodore James Miller, Daniel A. Hosko, George Gao
  • Patent number: 9705304
    Abstract: A method for identifying arcing faults within a circuit having a system frequency, an electrical current and an electrical voltage, in which method an interference signal occurring, which has a frequency below an LF1 frequency and a current intensity above an LF1 limit threshold, defines an LF1 signal, in which a number of interference signals occurring, which have a frequency below an HF2 frequency, are combined to form an HF2 signal if the number of interference signals occurring is greater than or equal to an HF2 number and the time interval between two successive interference signals is less than an HF2 time, in which the number of time periods with a respective length which amounts to an accumulation length and which follow one another directly in time and in which in each case at least one HF2 signal is present define an accumulation when the number of time periods is greater than or equal to an accumulation number.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: July 11, 2017
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Markus Miklis