Testing And Calibrating Electric Meters (e.g., Watt-hour Meters) Patents (Class 324/74)
  • Patent number: 10393791
    Abstract: A utility meter includes a meter housing that supports at least one current coil, a temperature sensor, and a processing circuit coupled to both. The current coil can be coupled to receive heat energy from a meter socket. The temperature sensor disposed generates a sensor signal based on a temperature within the meter housing. The processing circuit obtains the sensor signal and generates meter temperature information based at least in part thereon. The processing circuit also obtains a first predetermined threshold based on at least one of time of day information and date information. The processing circuit also determines whether an abnormal condition exists by comparing the meter temperature information to a value based on the first predetermined threshold, and generates an output signal to a memory, display or communication circuit responsive to determining that the abnormal condition exists.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 27, 2019
    Assignee: Landis+Gyr LLC
    Inventors: Mark David Minich, Steven John Schamber
  • Patent number: 10274572
    Abstract: A system for calibrating a power meter may include mechanically detachably electrically engaging a first power meter with a second power meter. The first power meter may receive a first current input signal representative of a current level in a first conductor to a load and receive a first voltage input signal representative of a voltage level in the first conductor, and determine a first power level based upon the first current input signal and the first voltage input signal. A second power meter may receive a second current input signal representative of the current level in the first conductor to the load from the first power meter, receive a second voltage input signal representative of the voltage level in the first conductor to the load from the first power meter, and determine a second power level based upon the second current input signal and the second voltage input signal.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 30, 2019
    Assignee: Veris Industries, LLC
    Inventor: Martin Cook
  • Patent number: 10171174
    Abstract: An apparatus comprises a phase modulator having a first input port to receive a radiation and having a first output port to provide a first signal toward a device under test (DUT), wherein the phase modulator is configured to generate the first signal by performing phase modulation on the radiation received at the first input port; an intensity modulator having a second input port to receive the radiation and having a second output port to provide a second signal toward the DUT, wherein the intensity modulator is configured to generate the second signal by performing intensity modulation on the radiation received at the second input port; and a transfer function analyzer configured to determine a transfer function of the DUT based on the first signal and the second signal.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: January 1, 2019
    Assignee: SUZHOU LIUYAOSI INFORMATION TECHNOLOGY CO., LTD.
    Inventors: Shilong Pan, Min Xue, Shifeng Liu, Shupeng Li, Jianbin Fu, Wansheng Pan
  • Patent number: 10164320
    Abstract: A transmitter assembly for transmitting data from a utility meter to a remote location for disposition in a subsurface utility enclosure is described. The assembly includes a printed circuit board, including a transmitter portion receiving the data from the utility meter and configured to generate a meter data message for transmission to the remote location, an antenna portion including a board mounted antenna receiving the generated meter data message and using the boarding mounted antenna to propagate the generated meter data message to a remote location, and a seal mount portion configured to receive a seal affixed to the printed circuit board.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 25, 2018
    Assignee: Badger Meter, Inc.
    Inventors: Matthew Stuyvenberg, Ryan Beverung, Jeremy Aderhold
  • Patent number: 9961979
    Abstract: “Hair Dryer with control switches underneath handle” (1) consisting of external body (2), provided of cable (2a), wire (3) and buttons/switches (4), and internally, engine (5), electrical resistance (6) and internal cabinet (7) that delimits heating air chamber (8), aforementioned cabinet (7) extending frontally out in short nozzle (7a), said hair dryer (1) incorporating digital hour counter (“hour meter”) (9associated with the appliance's engine (5), and presenting its buttons/switches (4) moved to the bottom (10) of the cable (2a), being provided cold air flow system, configured by spacing (11) and (12) that delimit cold air input and output, creating a cold air flow around and along the entire length of the outer surface of the internal cabinet (7), which isolates this latter of the inner surface of the body (2).
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 8, 2018
    Inventor: Oscar Jose Rodrigues
  • Patent number: 9918145
    Abstract: A water meter transmission system reads data from a water meter and wirelessly transmits data to a central billing or receiving system. Disclosed transmission systems are fully integrated and contained within pit housings such that electronic components are well protected. A spiral antenna is integrated into a specially configured integrated antenna cover which fits into the top cover of a pit housing. The antenna cover and/or upper lip area of the upper lip of the main housing may comprise a distal barrier and a medial barrier used to exclude water and contaminates. Disclosed transmission systems offer high output and low power consumption and vitiate the need for meter readers to physically access a water meter or other meters.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: March 13, 2018
    Assignee: Mueller International, LLC
    Inventor: Yoram Kenig
  • Patent number: 9912047
    Abstract: An antenna cover has a plate with a top surface and outer perimetric edge, and a housing affixed to or integrally formed with the plate. The housing extends downwardly from an underside of the plate. The housing is positioned within the outer perimetric edge. The housing is adapted to receive an antenna therein. The plate is formed of a radio-frequency transmissive material. The top surface of the plate taper slightly upwardly from the outer perimetric edge. The housing has a generally rectangular configuration with an open bottom. The plate is formed of a material such as an acetyl copolymer, and acetyl homopolymer and, or a polyester-reinforced thermoplastic.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: March 6, 2018
    Assignee: PARK TEQ, LLC
    Inventors: Chad W. Eberly, George W. Eberly, III, Christopher R. Howerton, Andreas H. Vu
  • Patent number: 9864358
    Abstract: Disclosed is an event input module, wherein the event input module receives time information which is an IRIG-B signal of a predetermined method from an outside time provider, allocates the time information to a detected event and determines event generation information.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: January 9, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Yong Gak Sin
  • Patent number: 9762980
    Abstract: A water meter transmission system reads data from a water meter and wirelessly transmits data to a central billing or receiving system. Disclosed transmission systems are fully integrated and contained within pit housings such that the electronic components are well protected. A flat spiral VHF antenna is integrated into a specially configured integrated antenna cover which fits into the top cover of a pit housing. The antenna cover and/or upper lip area of the upper lip of the main housing comprises protrusions complementary to the distal barrier and medial barrier of the integrated cover and is used to exclude water and contaminates. Disclosed transmission systems offer high output and low power consumption and vitiate the need for meter readers to physically access a water meter or other meters.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: September 12, 2017
    Assignee: Mueller International, LLC
    Inventor: Yoram Kenig
  • Patent number: 9548602
    Abstract: A ruggedized electronic enclosure for in-ground installation is disclosed. In one embodiment, the ruggedized electronic enclosure comprises a top cover which is exposed above a top surface of the ground and a cylindrical base portion which is embedded within the ground. The top cover and the cylindrical base portion are configured to create a channel conveying an adhesive toward the center of the ruggedized enclosure when the top cover and the cylindrical base portion are coupled.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: January 17, 2017
    Assignee: Trimble Inc.
    Inventors: John F. Cameron, Larry Collins, Daniel Shane Fitzgibbons
  • Patent number: 9494671
    Abstract: A method of error correction in automated test equipment (ATE) is presented. The method comprises calibrating the ATE using a calibration board, wherein the calibration board comprises a reference voltage. The calibrating comprises: (a) measuring the reference voltage using a reference channel and each of a plurality of channels in the ATE; (b) recording a series of differential voltage measurement values obtained from the measuring in a calibration module; and (c) calculating a respective correction factor for each of the plurality of channels utilizing the series of differential voltage measurement values. The method further comprises obtaining a measured voltage value for a DUT connected to a first channel in the ATE, wherein the first channel is one of the plurality of channels. Finally, the method comprises correcting the measured voltage value using a respective correction factor for said first channel.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: November 15, 2016
    Assignee: ADVANTEST CORPORATION
    Inventor: Thien Ngo
  • Patent number: 9444498
    Abstract: A transceiver circuit including a digital-to-analog converter, a filter coupled to the digital-to-analog converter, a passive mixer coupled to the filter, via a buffer and a multi-stage power amplifier coupled to the passive mixer via a passive amplifier. A transmitter and method for amplifying a RF signal for transmission are also provided.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: September 13, 2016
    Assignee: Broadcom Corporation
    Inventors: Rahul Magoon, Michael (Meng-An) Pan, Ahmad Mirzaei, Mohyee Mikhemar
  • Patent number: 9383223
    Abstract: A smart meter system architecture comprises of a local server, a coordinator, and a plurality of smart meters in a one-to-many data communication system configuration is disclosed. The invention discloses the architecture for a coordinator-server interface control register, data registers, routing table, non-volatile memory, parameter register, non-interruptible battery backup subsystem, and a low-power energy calculation and calibration method for resistive loads.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: July 5, 2016
    Assignee: INTERNATIONAL TECHNOLOGICAL UNIVERSITY
    Inventor: Karl L. Wang
  • Patent number: 9246530
    Abstract: A communication device includes a DC input component, a transmitting component an envelope detecting component, a receiving component, a storage component and a comparator. The DC input component generates a first direct current signal and a second direct current signal. The transmitting component generates a first transmitted signal based on the first direct current signal and a second transmitted signal based on the second direct current signal. The envelope detecting component generates a first envelope signal based on the first transmitted signal and generates a second envelope signal based on the second transmitted signal. The receiving component generates a first received signal based on the first envelope signal and a second received signal based on the second envelope signal. The storage component has a priori information stored therein. The comparator outputs a correlation signal based on the first received signal, the second received signal and the a priori information.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: January 26, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Michael Orlovsky, Eran Nussbaum, Asaf Even-Chen, Roy Beeri
  • Patent number: 9237007
    Abstract: A system and method are disclosed for securely transmitting and receiving a signal. A nonlinear keying modulator is used in the transmitter to encrypt the signal using a nonlinear keying modulation technique. A nonlinear keying demodulator is used in the receiver to decrypt the signal.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 12, 2016
    Assignee: Broadcom Corporation
    Inventor: Roy G. Batruni
  • Patent number: 9196977
    Abstract: An apparatus for use in wiring a multi-configurable electrical device during installation thereof at point of operation includes a substrate defining a plurality of tabs separated by at least one gap. The tabs and the gap or gaps are arranged such that when the substrate is positioned proximate the electrical device, the tabs cover a first group of one or more wiring terminals of the electrical device and the gap or gaps provides access to a second group of one or more wiring terminals of the electrical device in accordance with a first wiring configuration of a plurality of possible wiring configurations. According to one exemplary embodiment, the substrate is generally rectangular and non-conductive. Visible indicia may be optionally disposed on the substrate (e.g., by adhering a label containing the indicia to the substrate) to provide information relating to wiring the electrical device according to the first wiring configuration.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 24, 2015
    Assignee: Consert Inc.
    Inventor: Erasmo Perez, Jr.
  • Publication number: 20150061636
    Abstract: A system is provided for calibrating a device. The system includes a reference component, a sampling component, a calibration component, a comparing component and a proportional integral component. The reference component provides a reference power signal based on a voltage instruction and a current instruction. The sampling component samples a voltage signal to obtain a sampled voltage value and samples a current signal to obtain a sampled current value. The calibration component generates a calibrated power signal based on the sampled voltage value and the sampled current. The comparing component generates an error signal based on the reference power signal and the calibrated power signal. The proportional integral component and the calibration component are a feedback system that is operable to calibrate the gain of the sampled voltage and the sample current based on the error signal.
    Type: Application
    Filed: June 27, 2014
    Publication date: March 5, 2015
    Inventors: Kaichien Tsai, Minghua Fu, Anand Dabak
  • Publication number: 20150015232
    Abstract: An arrangement for measuring an internal clock within an electricity meter includes an optical communication circuit within the meter, an optical detector external to the meter, and a frequency counter. The optical communication circuit within the electricity meter is operably coupled to receive a pulse output of the meter's internal clock, and is further configured to generate a corresponding optical pulse representative of the pulse output. The optical detector is configured to detect the pulse output via an optical port of the electricity meter. The frequency counter is operably coupled to receive from the optical detector a signal that is representative of the detected pulse output.
    Type: Application
    Filed: June 17, 2014
    Publication date: January 15, 2015
    Inventor: John T. Voisine
  • Patent number: 8922224
    Abstract: An electronic system having a high speed signaling bus requiring training (calibration) of a calibrated item in a driver circuitry or a receiver circuitry for reliable operation. At manufacturing or in a secure location, secure calibration coefficients are determined for the electronic system and are stored in a non-volatile storage. During operation, the high speed signaling bus may be re-calibrated, resulting in a new currently active calibration coefficient for the calibrated item. A coefficient watchdog checks a new coefficient value selected by the re-calibration at present environmental conditions such as voltage and temperature against the secure calibration coefficients. If the new calibration coefficient value is the same as a calibration coefficient value in an acceptably close secure calibration coefficient, the new calibration coefficient is accepted; if not, a potentially probed warning is created by the coefficient watchdog.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: December 30, 2014
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: Ronald L. Billau, Roger J. Gravrok, Brian G. Holthaus, Darryl Solie
  • Patent number: 8902100
    Abstract: A aircraft hazard warning system or method can be utilized to determine a location of a turbulence hazard for an aircraft. The aircraft hazard warning system can utilize processing electronics coupled to an antenna. The processing electronics can determine an inferred presence of turbulence in response to lightning sensor data, radar reflectivity data, turbulence data, geographic location data, vertical structure analysis data, and/or temperature data. The system can include a display for showing the turbulence hazard and its location.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: December 2, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Daniel L. Woodell, Jeffery A. Finley, Gregory J. Koenigs, John G. Conkling
  • Patent number: 8878517
    Abstract: A method and apparatus provides high-accuracy measurements of an electrical parameter across a broad range of parameter input values. In one embodiment, an intelligent electronic device (IED), e.g., a digital electrical power and energy meter, with a plurality of independently-adjustable gain factors measures a parameter, and calculates and stores calibration factors associated with known values of the measured parameter. The IED or meter applies the stored calibration factors when measuring unknown values of the measured parameter, to improve the accuracy of the measurement.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: November 4, 2014
    Assignee: Electro Industries/Gauge Tech
    Inventor: Tibor Banhegyesi
  • Patent number: 8837118
    Abstract: A combined current transformer and metering system is described, having a securable case, two or more current transformers each having a core and secondary windings connected to a secondary circuit, wherein the transformers are mounted within the case. A wiring harness connects the secondary windings of the transformers with shorting current switches for short circuiting the secondary current circuit, and voltage switches for disconnecting a voltage, wherein both sets of switches are mounted on the case. A process of manufacturing the system is described, wherein the transformer cores are positioned within the case, the wiring is connected between the transformer cores and attachment hardware on an upper deck of the case, and insulation medium is inserted within the case. A base plate is described, having rails to hold the system and having a tab at one end, and apertures for a rod positionable between rails at a second end.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: September 16, 2014
    Inventor: Kenneth William McGrail
  • Patent number: 8823359
    Abstract: This disclosure relates to a three-phase electric energy measurement apparatus, comprising: a voltage detection unit for detecting voltage of each phase in power transmitting lines where the voltage detection unit is; a current detection unit for detecting current of each phase in the power transmitting lines where the current detection unit is; an electric energy calculation unit, connected to said voltage detection unit and said current detection unit, for receiving signals outputted from said voltage detection unit and said current detection unit, and performing signal processing and calculation, and then outputting a calculation result; wherein both said voltage detection unit and said electric energy calculation unit are connected in a star connection mode, forming a common virtual ground. Through the above-mentioned grounding manner different from that in the prior art, a three-phase four-wire electric energy meter is formed using a three-phase three-wire connection method.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: September 2, 2014
    Assignee: National Institute of Metrology P.R. China
    Inventors: Zhigao Zhang, Zhishou Zheng, Qingchang Qu
  • Patent number: 8803546
    Abstract: An apparatus for performing power detection includes a squarer module and a calibration module that is coupled to the squarer module, where the squarer module includes a first squarer and a second squarer. The first squarer is arranged to convert an input signal of the squarer module into a first squarer output signal. In addition, the second squarer is arranged to output a second squarer output signal while a predetermined voltage level is input into an input terminal of the second squarer. Additionally, the calibration module is arranged to compare a difference between the first squarer output signal and the second squarer output signal with a reference signal to generate a comparison signal, and to compensate the difference according to the comparison signal, so as to perform a calibration on the apparatus. A method for performing power detection is also provided, and can be performed by utilizing the apparatus.
    Type: Grant
    Filed: November 27, 2011
    Date of Patent: August 12, 2014
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventor: Zhiming Deng
  • Patent number: 8754630
    Abstract: An arrangement for measuring an internal clock within an electricity meter includes an optical communication circuit within the meter, an optical detector external to the meter, and a frequency counter. The optical communication circuit within the electricity meter is operably coupled to receive a pulse output of the meter's internal clock, and is further configured to generate a corresponding optical pulse representative of the pulse output. The optical detector is configured to detect the pulse output via an optical port of the electricity meter. The frequency counter is operably coupled to receive from the optical detector a signal that is representative of the detected pulse output.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: June 17, 2014
    Assignee: Lanids+Gyr, Inc.
    Inventor: John T. Voisine
  • Patent number: 8742748
    Abstract: Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined DC current is injected through a conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: June 3, 2014
    Assignee: International Business Machines Corporation
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Patent number: 8736249
    Abstract: A first envelope detector circuit and a second envelope detector circuit are the same in circuit configuration, where the former detects an input high frequency signal, and the latter generates a reference voltage for power level detection. A detector detects an output voltage of a selector configured to select an output of the first envelope detector circuit with reference to an output voltage of a selector configured to select an output of the second envelope detector circuit. A controller controls an input selector to determine and store control values for the two selectors during input of a high frequency reference signal generated by a high frequency reference signal generating unit, and controls the two selectors by using the stored control values when an actual high frequency signal is input.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: May 27, 2014
    Assignee: Panasonic Corporation
    Inventor: Ryangsu Kim
  • Patent number: 8717007
    Abstract: An intelligent electronic device having a terminal assembly for coupling the IED, e.g., a revenue meter, to a meter mounting socket. The assembly includes a housing including a generally planar, rigid base, the base including at least one opening and at least one circuit board having at least one electrically conducting terminal surface mounted thereon, the at least one electrically conducting terminal extending through the at least one opening of the base to mate with at least one matching jaw of a detachable meter mounting device coupled to the electrical circuit.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: May 6, 2014
    Assignee: Electro Industries/Gauge Tech
    Inventor: Tibor Banhegyesi
  • Patent number: 8692538
    Abstract: Calibrating test equipment may include: aligning timing of a first group of channels in the test equipment; aligning timing of a second group of channels in the test equipment, with the second group of channels being different from the first group of channels; determining a misalignment in timing between a first channel and a second channel, with the first channel being from the first group of channels, and the second channel being from the second group of channels; and compensating, for the misalignment, channels in at least one of the first group or the second group.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: April 8, 2014
    Assignee: Teradyne, Inc.
    Inventor: Bradley A Phillips
  • Patent number: 8558531
    Abstract: A method and system for determining a health of a metering system are provided. The metering system includes a meter base including a meter bus couplable between an electrical source and an electrical load, a plurality of sensors configured to determine electrical characteristics of electrical power in the meter bus, and a processor configured to execute at least one code segment. The code segments instruct the processor to determine revenue parameters for the metering system, determine at least one fault of a plurality of possible faults associated with the operation of the metering system using outputs from the plurality of sensors, the determination of the revenue parameters, and a processing fault generated by the processor, determine a severity level of each of the at least one faults, and determine a single value for a health of the metering system using the determined at least one fault.
    Type: Grant
    Filed: June 22, 2010
    Date of Patent: October 15, 2013
    Assignee: General Electric Company
    Inventors: Satish Sharadrao Khanke, Thrishul Patil
  • Patent number: 8552739
    Abstract: In an electronic device and a method of correcting time-domain reflectometers, two channels of a time-domain reflectometer are connected to a corrector using cables, and the two channels are enabled to transmit pulses. Parameters Step Deskew and Channel Deskew of the two channels are zeroed. Resistance values of the two channels are measured simultaneously, and the value of the parameter Step Deskew of one of the two channels is adjusted according to the Resistance values of the two channels. Times of achieving the same resistance value of the two channels are measured after the cables and the connector have been disconnected, and the value of the parameter Channel Deskew of one of the two channels is adjusted according to the times of achieving the same resistance value. The adjusted values of the parameters Step Deskew and Channel Deskew are displayed through a display unit.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: October 8, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Hsien-Chuan Liang, Shen-Chun Li, Shou-Kuo Hsu
  • Publication number: 20130241529
    Abstract: Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined DC current is injected through a conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode.
    Type: Application
    Filed: May 9, 2013
    Publication date: September 19, 2013
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Patent number: 8508212
    Abstract: Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined current is injected through a voltage sensing conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode. The voltage sensing conductor is used to provide an indication of the magnitude and/or the phase of the electrostatic potential on the wire. The calibration current may be a DC current, and calibration may be performed while the conductor is carrying an AC current.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: August 13, 2013
    Assignee: International Business Machines Corporation
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Patent number: 8502714
    Abstract: A method for calibrating at least one analog-to-digital converting circuit includes: during a wafer level probe testing, inputting at least one calibration signal provided by a wafer level testing machine into the analog-to-digital converting circuit to generate at least one digital signal; and calibrating the analog-to-digital converting circuit according to at least the digital signal. The analog-to-digital converting circuit is applied to a video system or an audio system.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: August 6, 2013
    Assignee: Mediatek Inc.
    Inventors: Chien-Ming Chen, Chen-Yu Hsiao
  • Patent number: 8493054
    Abstract: Calibration of a non-contact voltage sensor provides improved accuracy for measuring voltage on a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined voltage is imposed on a first voltage sensing conductor integrated in the non-contact voltage sensor, while a voltage on a second voltage sensing conductor is measured using a circuit of predetermined input impedance. The capacitance between the wire and each of the voltage sensing conductors may be the same, so that in measurement mode, when the first and second voltage sensing conductors are coupled together, the effective series capacitance provided in combination with the predetermined input impedance is four times as great. The results of the voltage measurement made in the calibration mode can thereby be used to adjust subsequent voltage measurements made in measurement mode with the first and second voltage sensing conductors combined in parallel.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: July 23, 2013
    Assignee: International Business Machines Corporation
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Patent number: 8489346
    Abstract: A method and apparatus measures electrical power usage and quality, while mitigating the effects of noise on measured signals or parameters. Specifically, a digital electrical power and energy meter employs a method in which a processor averages a parameter, such as voltage or current, over a plurality of cycles of a time-varying signal, such as an AC electrical signal. The method employed by the meter samples a parameter over the plurality of cycles and computes the average of the samples corresponding to the same phase angle of the signal to produce an average signal.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 16, 2013
    Assignee: Electro Industries/Gauge Tech
    Inventor: Tibor Banhegyesi
  • Patent number: 8482908
    Abstract: A sealed electronic meter register with no moving parts and no bottom wall or bottom cover includes a casing of plastic with an open bottom. A viewing window is snap fitted into a top wall of the casing. A gasket is placed on top of an electronic numerical display and under the viewing window. The display is placed on top of a frame that is positioned face down into the casing. An electronic circuit board with the processing circuitry of the device is attached to the bottom of the frame. A polyurethane compound sealing material is deposited though a hole in the circuit board and onto the backside of the display. An epoxy-resin sealant is then deposited from the bottom of the housing to seal over everything in the housing to protect the components and provide an exposed bottom surface for the assembly.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: July 9, 2013
    Assignee: Badger Meter, Inc.
    Inventors: Dennis W. Schwartz, Eric Metzger, John A. Olson, Ronald D. Benson, Eric Tabaska
  • Publication number: 20130134961
    Abstract: An apparatus for performing power detection includes a squarer module and a calibration module that is coupled to the squarer module, where the squarer module includes a first squarer and a second squarer. The first squarer is arranged to convert an input signal of the squarer module into a first squarer output signal. In addition, the second squarer is arranged to output a second squarer output signal while a predetermined voltage level is input into an input terminal of the second squarer. Additionally, the calibration module is arranged to compare a difference between the first squarer output signal and the second squarer output signal with a reference signal to generate a comparison signal, and to compensate the difference according to the comparison signal, so as to perform a calibration on the apparatus. A method for performing power detection is also provided, and can be performed by utilizing the apparatus.
    Type: Application
    Filed: November 27, 2011
    Publication date: May 30, 2013
    Inventor: Zhiming Deng
  • Patent number: 8446143
    Abstract: Various embodiments of a self-calibration circuit may solve the problem that arises in high performance oscilloscopes and in particular, RF oscilloscopes, of internally providing a precision calibration signal without degrading the bandwidth, flatness of the frequency response, and input return loss of the oscilloscope. The self-calibration circuit may be configured to implement an impedance transformation technique where active and passive circuit elements with carefully chosen values are configured in an impedance converter. During self-calibration, switching elements comprised in the self-calibration circuit may be toggled to create a servo loop comprising an amplifier within the circuit, with an attenuator and resistive component acting as feedback elements. The circuit may hence become an impedance gyrator and behave as a precision source with an impedance matching the input impedance of the load circuit.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: May 21, 2013
    Assignee: National Instruments Corporation
    Inventors: Mark Whittington, Zaher G. Harb
  • Publication number: 20130119972
    Abstract: Some embodiments can concern a method of using an electrical sensor device. The method can include: determining a first current measurement of a first current in an electrical power infrastructure and a first phase angle measurement of the first current; determining that a first load is coupled to the electrical power infrastructure; while the first load is coupled to the electrical power infrastructure, determining a second current measurement of a second current in the electrical power infrastructure and a second phase angle measurement of the second current; and using a Kalman filter to determine one or more first calibration coefficients for the electrical sensor device at least in part using the first current measurement, the second current measurement, the first phase angle, and the second phase angle. Other embodiments are disclosed.
    Type: Application
    Filed: January 8, 2013
    Publication date: May 16, 2013
    Applicant: BELKIN INTERNATIONAL, INC.
    Inventor: BELKIN INTERNATIONAL, INC.
  • Publication number: 20130088213
    Abstract: A current switch that can be reset when it is not powered automatically calibrates itself when the circuit monitored by the current switch is energized.
    Type: Application
    Filed: July 31, 2012
    Publication date: April 11, 2013
    Applicant: VERIS INDUSTRIES, LLC
    Inventor: David PIERSON
  • Publication number: 20120319674
    Abstract: Calibration of a non-contact current sensor provides improved accuracy for measuring current conducted through a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined current is injected through a voltage sensing conductor integrated in the non-contact current sensor. The magnitude of the magnetic field is measured using a sensing element of the non-contact current sensor. Then, when operating in measurement mode, a current conducted in a wire passing through the non-contact current sensor is determined by correcting the output of the non-contact current sensor using the result of the measurement made in the calibration mode. The voltage sensing conductor is used to provide an indication of the magnitude and/or the phase of the electrostatic potential on the wire. The calibration current may be a DC current, and calibration may be performed while the conductor is carrying an AC current.
    Type: Application
    Filed: June 14, 2011
    Publication date: December 20, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Publication number: 20120319675
    Abstract: Calibration of a non-contact voltage sensor provides improved accuracy for measuring voltage on a conductor such as an AC branch circuit wire. In a calibration mode, a predetermined voltage is imposed on a first voltage sensing conductor integrated in the non-contact voltage sensor, while a voltage on a second voltage sensing conductor is measured using a circuit of predetermined input impedance. The capacitance between the wire and each of the voltage sensing conductors may be the same, so that in measurement mode, when the first and second voltage sensing conductors are coupled together, the effective series capacitance provided in combination with the predetermined input impedance is four times as great. The results of the voltage measurement made in the calibration mode can thereby be used to adjust subsequent voltage measurements made in measurement mode with the first and second voltage sensing conductors combined in parallel.
    Type: Application
    Filed: June 14, 2011
    Publication date: December 20, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wael El-Essawy, Alexandre Peixoto Ferreira, Thomas Walter Keller, Sani R. Nassif
  • Publication number: 20120313618
    Abstract: Calibrating test equipment may include: aligning timing of a first group of channels in the test equipment; aligning timing of a second group of channels in the test equipment, with the second group of channels being different from the first group of channels; determining a misalignment in timing between a first channel and a second channel, with the first channel being from the first group of channels, and the second channel being from the second group of channels; and compensating, for the misalignment, channels in at least one of the first group or the second group.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 13, 2012
    Applicant: Teradyne, Inc.
    Inventor: Bradley A Phillips
  • Patent number: 8332175
    Abstract: An oscilloscope probe calibrating system for a single terminal probe and a differential probe includes an oscilloscope, a main branch module, a sub-branch module, and a resistor. The oscilloscope includes multiple inputs for receiving signals from the single terminal probe and the differential probe, an output for outputting an original calibration signal, and a display module displaying the waveforms of the original calibration signal and the signals from the single terminal probe and the differential probe. The main branch module converts the original calibration signals to a number of first calibration signals. The sub-branch module converts the first calibration signals to a number of second calibration signals. The sub-branch module includes a single terminal sub-branch module and a differential sub-branch module coupled to the main branch module. One end of the resistor is connected between the main branch module and the differential sub-branch module, and the other end is grounded.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: December 11, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventor: Hui Li
  • Publication number: 20120310557
    Abstract: A power and energy meter self configures the pulse weight and pulse duration for pulse communication.
    Type: Application
    Filed: May 8, 2012
    Publication date: December 6, 2012
    Applicant: VERIS INDUSTRIES, LLC
    Inventors: Marc Bowman, Aaron Parker
  • Publication number: 20120299574
    Abstract: An apparatus includes a connector and a connecting apparatus. The connector includes a first pin and a shell surrounding the first pin. The shell is insulated from the first pin. The connecting apparatus includes a main body, a second pin, and a third pin. The main body is connected to a bottom of the shell of the connector. First ends of the second and third pins extend through the main body, to be electrically connected to the first pin and the shell, respectively. Second ends of the second and third pins are exposed through a bottom of the main body.
    Type: Application
    Filed: June 29, 2011
    Publication date: November 29, 2012
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHUANG-WEI TSENG, CHI-MIN WANG, CHIH-YU YEH, CHIA-MING YEH
  • Publication number: 20120299575
    Abstract: A load regulation circuit used for calibrating a voltage drop tester includes a voltage control switch, a first resistor group, a power control switch and a second resistor group electrically connected to the first resistor group through the power control switch. When the voltage control switch is switched on to different positions, the first resistor group provides different loads and load voltages for the voltage drop tester. When the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester. The load regulation circuit can simulate and replace different electronic device to calibrate the voltage drop tester.
    Type: Application
    Filed: July 12, 2011
    Publication date: November 29, 2012
    Applicants: HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.
    Inventor: XIAO-LIAN HE
  • Patent number: 8310224
    Abstract: Embodiments of circuits, devices, and methods related to calibration circuits are disclosed. In various embodiments, a calibration circuit may be used for calibrating a power detector circuit. In various other embodiments, a calibration circuit may be used for calibrating a resistor module. Other embodiments may also be described and claimed.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: November 13, 2012
    Assignee: TriQuint Semiconductor, Inc.
    Inventor: Kiran Karnik
  • Patent number: 8248059
    Abstract: A method and apparatus for mounting an electronic measuring device inside the housing a pad mount low voltage distribution power transformer are provided. The space inside a transformer enclosure cover contains the power input and output connections and cables. The electronic measuring device includes a surface mounting assembly that is configured to mount the measuring device at multiple locations of the housing.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: August 21, 2012
    Assignee: Elster Solutions, LLC
    Inventor: David Michael Cooper