By Frequency Sensitive Or Responsive Detection Patents (Class 324/520)
  • 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
    Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
    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
    Assignee: INFINEON TECHNOLOGIES AG
    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
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    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
    Assignee: IMPERIAL INNOVATIONS LIMITED
    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
    Assignee: RENESAS ELECTRONICS CORPORATION
    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
    Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
    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
    Assignee: HIRSCHMANN AUTOMATION AND CONTROL GMBH
    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: 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
    Assignee: AUDYSSEY LABORATORIES, INC.
    Inventor: Jeffrey Clark
  • 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
    Assignee: DET INTERNATIONAL HOLDING LIMITED
    Inventors: Christian Krumpholz, Zoran Radakovic, Nikola Georgijevic, Srdjan Srdic
  • 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
    Assignee: EATON CORPORATION
    Inventors: Theodore James Miller, Daniel A. Hosko, George Gao
  • Patent number: 9702846
    Abstract: A device includes a biosensor, a sensing circuit electrically connected to the biosensor, a quantizer electrically connected to the sensing circuit, a digital filter electrically connected to the quantizer, a selective window electrically connected to the digital filter, and a decision unit electrically connected to the selective window.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: July 11, 2017
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Jui-Cheng Huang, Yi-Shao Liu, Chun-Wen Cheng, Tung-Tsun Chen, Chin-Hua Wen
  • 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
  • Patent number: 9689925
    Abstract: An arc fault circuit interrupter test circuit is disclosed. The test circuit incorporates a controller along with at least one power transistor, a current sense circuit and a voltage sense circuit. When the power transistor is operated, the current flowing through the transistor is sensed, and if the current is not at least equal to a threshold value, the voltage at which the power transistor is operated is increased.
    Type: Grant
    Filed: November 10, 2013
    Date of Patent: June 27, 2017
    Assignee: Unique Technologies, LLC
    Inventors: Kerry Berland, Paul Berland, Mitch Budniak
  • Patent number: 9634479
    Abstract: Systems and methods of detecting arcing in a DC power system that can provide improved noise propagation immunity. The system includes at least two current sensors for monitoring at least two current outputs, respectively. The current sensors have reverse polarities, and are configured and arranged in parallel to provide a combined current output signal. The current sensors monitor the respective current outputs, which are provided for monitoring by the current sensors over at least two adjacent conductors. If arcing occurs at a location on a first conductor, then arcing (adjacent conductor crosstalk), having an arc current signature like that of the arcing on the first conductor, can occur at a location on the other adjacent conductor. The system can effectively cancel out such adjacent conductor crosstalk within a photovoltaic (PV) system, thereby improving the capability of an arc fault detection device for detecting arcing at the PV string level.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: April 25, 2017
    Assignee: SENSATA TECHNOLOGIES, INC.
    Inventors: Jianhong Kang, Christian V. Pellon, Lee Martin, Keith W. Kawate
  • Patent number: 9618624
    Abstract: The invention relates to a sports- and general pole element. The pole element includes components for an arrangement for operating a handheld geophysical locating device with at least one sensor, a power supply, an operating unit, and an interface for wireless data transmissions, wherein the components are arranged concealed in a body of the sports- or general pole element and wireless transmission of locating data is provided through the interface to a mobile evaluation- and display unit.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: April 11, 2017
    Assignee: OKM GMBH
    Inventor: Andreas Krauss
  • Patent number: 9606164
    Abstract: An early fault detection system for a low voltage distribution network including: at least two detectors, each located on one of two power poles at either end of a section of a power distribution line; each detector includes a GPS unit, an uninterruptable power supply, a communication means to send data to a base station, antenna sensors having a bandwidth range of 1 MHz to 3 GHz for each wire in the power line, and a processor receiving signals from each sensor and collecting data relating to a maximum value, a time of maximum value, a minimum value, and a time of minimum value for partial discharge signals within the bandwidth range; and the processor or base station being programmed to analyze the collected data to identify a location of pulses above a predetermined value and record the number of such pulses at each location over a predetermined time interval.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: March 28, 2017
    Assignee: DX TECH PTY LTD
    Inventors: Khoi Loon Wong, Alexe Bojovschi
  • Patent number: 9583892
    Abstract: An aircraft having an avionics system comprising a plurality of avionics equipment and a system of connections, the avionics equipment incorporating protection means for providing protection against indirect effects of lightning, the system of connections including wired connections and connectors between the wired connections. The avionics system has at least one avionics equipment with protection means that are insufficient for providing total protection against the indirect effects of lightning when the equipment is incorporated in the structure, which equipment is connected to at least one connector including a resistor connected in series relative to at least one wired connection secured to the resistive connector.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: February 28, 2017
    Assignee: Airbus Helicopters
    Inventor: Bertrand Chatain
  • Patent number: 9568540
    Abstract: A method for characterizing an integrated circuit that includes ramping the supply voltage to an integrated circuit as a function of time for each of the transistors in the integrated circuit, and measuring a power supply current for the integrated circuit during the ramping of the power supply voltage. The measured peaks in the power supply current are a current pulse that identifies an operation state in which each of the transistors are in an on state. The peaks in the power supply current are compared to the reference peaks for the power supply current for a reference circuit having a same functionality as the integrated circuit to determine the integrated circuit's fitness.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: February 14, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Raphael P. Robertazzi, Peilin Song, Franco Stellari
  • Patent number: 9513320
    Abstract: An electrical test device may include a power supply, a conductive probe element, and a spectral analysis block. The power supply may be connected to an external power source. The conductive probe element may be connected to the power supply and may be configured to be energized by the power supply. The probe element may be configured to be placed in contact with an electrical system under test and apply an input signal containing current for measuring at least one parameter of the electrical system. The spectral analysis block may be connected to the probe element and may be configured to receive an output signal from the electrical system in response to the application of the current to the electrical system. The spectral analysis block may be configured to analyze frequency spectra of the output signal and detect a broadband increase in energy of the frequency spectra above a predetermined energy threshold.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: December 6, 2016
    Assignee: Power Probe, Inc.
    Inventors: Jeff Whisenand, Randy Cruz
  • Patent number: 9392648
    Abstract: A method for controlling an induction heating cooking apparatus, comprises the steps of a) transforming a supply current (Iin) having a base frequency, for example 50 Hz or 60 Hz, into an induction current (Iw) having a higher frequency than the base frequency of the supply current, b) feeding the induction current into at least one inductor of the induction heating cooking apparatus to generate a magnetic induction field, c) detecting a deviation or distortion of the actual shape or frequency spectrum of the supply current or a rectified supply current from a predetermined admissible shape or frequency spectrum lying outside of a pre-given tolerance range, d) adapting the induction current or the electrical power associated with the induction current until the detected deviation or distortion of the actual shape or frequency spectrum of the supply current or a rectified supply current from the predetermined shape or frequency spectrum lies within the pre-given tolerance range again.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: July 12, 2016
    Assignee: ELECTROLUX HOME PRODUCTS CORPORATION N.V.
    Inventors: Laurent Jeanneteau, Svend Erik Christiansen, Alex Viroli, Massimo Zangoli, Thibaut Rigolle, Mario Barocci
  • Patent number: 9391719
    Abstract: A method for determining the place of origin of a passive intermodulation product excites a distributed device under test with two first excitation signals (x1(t), x2(t), each with a single spectral line, of which the frequencies (f1, f2) provide a frequency spacing relative to one another. Following this, the phase (?IM3Meas) of a first passive intermodulation product generated at the place of origin in the distributed device under test from the first excitation signals ((x1(t), x2(t)) by nonlinear distortion is measured, and the delay time of the first passive intermodulation product from the place of origin to the measuring device is calculated from the measured phase (x1(t), x2(t)) and the frequency (2·f1?f2) of the first passive intermodulation product. Finally, the place of origin of the passive intermodulation product is determined from the delay time and the topology of the distributed device under test.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: July 12, 2016
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventors: Steffen Neidhardt, Christian Evers
  • Patent number: 9335150
    Abstract: Probes of a conductor length measurement device are connected to piping, and an output voltage is applied to the piping through the probes. A frequency spectrum curve is subsequently calculated by subjecting a voltage signal to FFT. Resonant frequencies of the piping are then determined from this frequency spectrum curve, and the total length of the piping is calculated on the basis of the resonant frequencies. The total length of the piping can therefore be easily measured without the need to install, for example, any measurement instruments at branch terminals.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshiyasu Higuma, Naoyuki Hibara, Tomoaki Gyota
  • Patent number: 9322881
    Abstract: An impulse voltage generator uses a predetermined rectangular waveform signal and a high voltage to generate an impulse voltage. The high voltage is obtained by boosting an instruction voltage of the rectangular waveform signal on a per-cycle basis. A partial discharge frequency calculation section receives detection signals based on partial discharges occurring in an object to be measured by the application of the impulse voltage and counts the detection signal on a per-cycle basis as a partial discharge frequency. An application voltage signal observation circuit observes an application voltage signal indicating the impulse voltage applied to the object to be measured. In a first cycle in which the partial discharge frequency reaches a specified frequency or more, a voltage value acquiring section sets, as a partial discharge starting voltage, the peak value of the voltage indicated by the application voltage signal output from the application voltage signal observation circuit.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 26, 2016
    Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki Sakurai, Hiroyuki Ogawa, Tetsuo Yoshimitsu, Tatsuya Hirose, Satoshi Hiroshima
  • Patent number: 9325167
    Abstract: A power equipment protection system is provided. The power equipment protection system includes a first trip unit configured to monitor a first circuit, a second trip unit configured to monitor a second circuit that is downstream from the first circuit, an arc-flash (AF) sensor configured to detect an arc flash, an AF mitigation device, at least one current sensor, and a controller. The power equipment protection system is operable in a first mode and a second mode, wherein in the first mode, the controller is configured to activate the AF mitigation device based on signals generated by both the AF sensor and the at least one current sensor, and wherein in the second mode, the controller is configured to activate the AF mitigation device based on signals generated by at least one of the at least one current sensor and the AF sensor.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: April 26, 2016
    Assignee: General Electric Company
    Inventors: Brent Charles Kumfer, Henry Hall Mason, Jr., Craig Benjamin Williams, Marcelo Esteban Valdes
  • Patent number: 9270813
    Abstract: A system and method for testing lines to determine service-affecting conditions on a line, such as telephone wiring. Conditions may be identified from low frequency variations in a frequency spectrum measured on the line. The line may be stimulated with a broad spectrum signal, such as may be generated by a DSL modem operating in the L0 state or may be the result of noise on the line. Analysis of the low frequency variations may yield information about the nature of service-affecting conditions allowing conditions, such as un-terminated or poorly-terminated extensions to be identified. The method may be performed by a test device attached to premises wiring in a telephone network and used to determine whether the premises wiring will support VDSL2 or other high speed data services without modification or may indicate changes at the premises to enable the wiring to support high speed data services.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: February 23, 2016
    Assignee: Tollgrade Communications, Inc.
    Inventor: Roger Faulkner
  • Patent number: 9140731
    Abstract: A controller and infrastructure for an impedance analyzer measures responses to perturbations to respective phases of a multi-phase system at an interface between stages thereof (which may be considered as a source and load in regard to each other), such as a multi-phase electrical power system, to determine a transfer function for each phase of the multi-phase system from which the impedance of each of the source and load can be calculated, particularly for assessing the stability of the multi-phase system.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 22, 2015
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Gerald Francis, Rolando Burgos, Dushan Boroyevich, Fred Wang, Zhiyu Shen, Paolo Mattavelli, Kamiar Karimi, Sheau-Wei Johnny Fu
  • Patent number: 9054785
    Abstract: Method and arrangement in a telecommunication system for estimating frequency dependent resistance of a transmission line. Insertion loss per length unit of the transmission line at a first frequency is determined. Thereupon a first resistance per length unit based on the determined insertion loss per length unit of the transmission line is calculated. Effective resistance per length unit at a second frequency based on the calculated first resistance is calculated. The calculated effective resistance could be used when estimating the insertion loss for the second frequency and all frequencies of interest.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 9, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Miguel Berg, Daniel Cederholm, Per Ola Börjesson
  • Patent number: 9043039
    Abstract: An arc detection and intervention system for a solar energy system. One or more arc detectors are strategically located among strings of solar panels. In conjunction with local management units (LMUs), arcs can be isolated and affected panels disconnected from the solar energy system.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: May 26, 2015
    Assignee: TIGO ENERGY, INC.
    Inventors: Daniel Eizips, Shmuel Arditi
  • Patent number: 8963556
    Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: February 24, 2015
    Assignee: Eaton Corporation
    Inventors: Santosh Kumar Sharma, Xin Zhou, Steven Andrew Dimino, Supriya Karnani, Snehal Kale, Rahul Choudhary, Debsubhra Chakraborty
  • Publication number: 20140354293
    Abstract: A system for the early detection of faults in a low voltage distribution network in which at least two detectors are each located on one of two power poles at either end of a section of a power distribution line, each detector includes a GPS unit, an uninterruptable power supply, a communication means to send data to a base station, antenna sensors having a bandwidth of 1 MHz to 3 GHz for each wire in the power line, a processor to receive signals from each sensor and collect data relating to the maximum value, time of maximum value, minimum value and time of minimum value for partial discharge signals within the range and the processor or base station being programmed to analyse the collected data to identify location of pulses above a predetermined value and record the number of such pulses at each location over a predetermined time interval to enable identification of likely sites of faults in the distribution line.
    Type: Application
    Filed: December 24, 2012
    Publication date: December 4, 2014
    Inventors: Khoi Loon Wong, Alexe Bojovschi
  • Patent number: 8901916
    Abstract: A method of testing an electronic device includes measuring radio frequency emissions at a plurality of positions relative to a trusted unit of a particular electronicdevice during operation of the trusted unit, and measuring radio frequency emissions at the same plurality of positions relative to a second unit of the particular electronic device. For each of the plurality of positions, the radio frequency emissions measured from the second unit are compared to the radio frequency emissions measured from the trusted unit. The method then determines whether there is any frequency at which the measured amplitude of the radio frequency emissions from the second unit and the measured amplitude of the radio frequency emissions from the trusted unit exhibit a statistically significant difference.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 2, 2014
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: Phillip D. Jones, Thomas D. Pahel, Jr., Adam J. Parker, Adrian X. Rodriguez