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4167results about "Voltage-current phase angle" patented technology
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Battery pack, electronic appliance, and method of detecting remaining amount of battery
InactiveUS8359174B2Accurate detectionCircuit monitoring/indicationElectrical testingPower flowCharge current
A battery pack has a charge and discharge count measuring part (131) configured to measure the number of times of charges and discharges of a secondary battery based on the summed value of the charge current for the secondary battery, and a decay rate output part (132) configured to compute a decay rate that indicates a degree of decay of the secondary battery based on the number of times of charges and discharges measured by the charge and discharge count measuring part (131) and to output it to a device being a discharge load. For example, the charge and discharge count measuring part (131) repeatedly sums the detected values of the charge current to a predetermined threshold, and counts up the number of times of charges and discharges every time when the summed value reaches the threshold. Accordingly, even though charges and discharges are repeated at finer steps in a relatively narrow voltage range, the number of times of charges and discharges can be counted accurately, and the computing accuracy of the decay rate is improved. In the battery pack in which the secondary battery is accommodated, parameters for detecting the remaining amount of the battery are detected more accurately.
Owner:SONY CORP
Using a fixed network wireless data collection system to improve utility responsiveness to power outages
ActiveUS7308370B2Good serviceElectric signal transmission systemsElectrical testingCollection systemWireless data
A system for determining service outages and restorations includes an outage management server (OMS) that generates reports of outages and restoration information for metering endpoints. The outages may be caused by faults at various locations in the distribution network. The metering endpoint may include a transmitter having a battery backup that transmits the outage information upon a failure to detect a voltage at the endpoint. The transmission of the information may be filtered based on configurable criteria. The metering endpoints may also inform the OMS when power is restored.
Owner:ELSTER ELECTRICTY LLC
Method for software driven generation of multiple simultaneous high speed pulse width modulated signals
InactiveUS7113541B1Electroluminescent light sourcesVoltage-current phase angleTime segmentControl signal
Systems and methods can provide, in one aspect, a method for modulating the pulse width of control signals generated on a plurality of separate channels. In one practice, the methods described herein are suitable for execution on a microprocessor or micro controller platform that includes a timer interrupt mechanism which will generate an interrupt in response to a timer counting down a selected time interval or time period. In one practice, the timer is set to count down a period of time that is representative of a portion, or sub period, of the PWM cycle. Upon expiration of that time period, the timer executes an interrupt that causes the micro controller to enter an interrupt service routine (ISR) that can further modulate the PWM cycle of one or more signals.
Owner:PHILIPS SOLID STATE LIGHTING SOLUTIONS
Low cost millimeter wave imager
InactiveUS7583074B1Low costUseful sensitivity levelMeasurement using dc-ac conversionMeasurement using ac-dc conversionLow noiseTunnel diode
Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias results in low noise detectors that alleviate the need for expensive and heat generating low noise amplifiers or Dicke switches in the imager. BTD detectors are installed on a printed circuit board using flip chip packaging technology and horn antennas direct the waves toward the flip chip including the BTD detectors. The assembly of the horn antennas, flip chips, printed circuit board substrate, and interconnects together work as an imaging sensor. Corrugated surfaces of the components prevent re-radiation of the incident waves.
Owner:HRL LAB
Monitoring device for a medium voltage overhead line
InactiveUS7518529B2Reduce the amount requiredConserve costTelemetry/telecontrol selection arrangementsResistance/reactance/impedenceEngineeringOverhead line
A monitoring device (1) for monitoring the electrical properties of a medium voltage overhead line (3) in a medium voltage network comprises three separate measurement sensors (2a, 2b, 2c), each being adapted for direct connection onto a medium voltage overhead line. Each of the measurement sensors has means to draw operating power from the medium voltage overhead line. The measurement sensors measured results may be combined for accurate measurement analysis.
Owner:FMC TECH LTD
Advanced analyte sensor calibration and error detection
Systems and methods for processing sensor data and self-calibration are provided. In some embodiments, systems and methods are provided which are capable of calibrating a continuous analyte sensor based on an initial sensitivity, and then continuously performing self-calibration without using, or with reduced use of, reference measurements. In certain embodiments, a sensitivity of the analyte sensor is determined by applying an estimative algorithm that is a function of certain parameters. Also described herein are systems and methods for determining a property of an analyte sensor using a stimulus signal. The sensor property can be used to compensate sensor data for sensitivity drift, or determine another property associated with the sensor, such as temperature, sensor membrane damage, moisture ingress in sensor electronics, and scaling factors.
Owner:DEXCOM
Gap-mode waveguide
ActiveUS8952678B2Low dispersionMultiple-port networksResistance/reactance/impedenceUltrasound attenuationWaveguide
In a gap-mode waveguide embodiment, an interior gap in a tubular waveguide principally condenses a dominant gap mode near the interior gap, and an absorber dissipates electromagnetic energy away from the gap mode. In this manner, the gap mode may dissipate relatively little power in the absorber compared to other modes and propagate with lesser attenuation than all other modes. A gap mode launched into a gap-mode waveguide may provide for low-loss, low-dispersion propagation of signals over a bandwidth including a multimode range of the waveguide. Gap-mode waveguide embodiments of various forms may be used to build guided-wave circuits covering broad bandwidths extending to terahertz frequencies.
Owner:GIBONEY KIRK S
Digital spread spectrum methods and apparatus for testing aircraft wiring
InactiveUS7069163B2Efficient implementationElectronic circuit testingTesting electric installations on transportOriginal dataData signal
A system and method that utilizes direct sequence spread spectrum signal (DSSS) encoding to enable testing of a live wire, wherein an original data signal is modified and then transmitted along the wire, and a reflected signal is collected and analyzed using correlation techniques to determine characteristics of the live wire, including the location of a fault.
Owner:UTAH STATE UNIVERSITY
Method and apparatus for optically analyzing a surface
InactiveUS20070091317A1Quick and efficient analysisEffectively and accurately characteristicRadiation pyrometryInterferometric spectrometryCharacterization testBroadband
Apparatus and methods are provided for analyzing surface characteristics of a test object using broadband scanning interferometry. Test objects amenable to these apparatus and methods include but are not limited to semiconductor wafers, semiconductor devices, metallic surfaces, and the like. An interferometry system is used to obtain an interferometry signal and related to data embodied in the signal representative of the test object surface. This signal and / or data is used to construct an n-dimensional function that includes an independent frequency variable and an independent time variable, and / or an n-dimensional function that includes an independent scale variable and an independent time variable, and / or a multi-domain function. These functions are compared with various models to obtain a best match that is then used to characterize the test object surface.
Owner:PHASE SHIFT TECH
Interconnect for on-body analyte monitoring device
ActiveUS20110191044A1Resistance/reactance/impedenceMicrobiological testing/measurementAnalyteEngineering
Disclosed herein are systems and methods for providing a compressible interconnect for allowing electrical communication between an electronics unit and an analyte sensor in an on-body analyte monitoring device. In other embodiments, systems and methods are provided for reducing the Z-height of an on-body analyte monitoring device by utilizing novel interconnects.
Owner:ABBOTT DIABETES CARE INC
Self-powered current monitor
A self-powered current monitor for monitoring current in electric power systems. Various data relating to input currents may be displayed, such as current magnitude, current demand, and harmonics levels. Operating power is derived from one or more of the input currents. The power supply configuration may include a burden-reducing means to reduce the burden on input current sources during sampling of the input currents. The self-powered current monitor (1) includes a power supply section (3), input resistors (R1 and R3), an analog-to-digital converter circuit (5), a microprocessor circuit (6), a memory circuit (9), and a display circuit (7). Optional features include a burden-reducing circuit (2), input circuit protective elements (D1, D2, D3, D4, R2, and R4), an amplifier circuit (4), a user interface circuit (10), and an interface circuit (8) for communication to other equipment.
Owner:EDEL THOMAS G
Method and apparatus for reading and controlling electric power consumption
ActiveUS20050096857A1Avoid the needElectric devicesTariff metering apparatusCommunications systemControl power
An electro-optical, automatic meter reader for enabling a consumer to view and manage power consumption through a browser. A sensor attached to a bracket is mounted to the outside cover of a utility meter without modification of the meter or removal of its housing. A data-collector stores data obtained from the sensor via a serial port which may also provide power for the sensor, thus avoiding use of a dedicated power supply. The data-collector connects to a computer which provides a centralized object through which to view and manage power consumption. The real-time and combined historic data can be used to forecast whether usage will fall above or below a predetermined usage level at the end of a given period of time. In response to a forecast exceeding the level, the computer displays the appropriate graph in a red colored bar within a quantity vs. time chart. The computer may control power consuming devices. A communication system may be established to the system for remote management by the consumer or by the utility company for its own billing and management purposes.
Owner:TRENDPOINT SYST
Methods and systems for observing sensor parameters
ActiveUS20110230741A1Testing/calibration apparatusResistance/reactance/impedenceVoltage pulseMonitors blood glucose
The invention disclosed herein provides methods and materials for observing the state of a sensor, for example those used by diabetic patients to monitor blood glucose levels. Typically a voltage such as a voltage pulse is applied to the sensor in order to solicit a current response from which for example, factors such as impedance values can be derived. Such values can then be used as indicators of a sensor's state, for example the state of sensor hydration, sensor noise, sensor offset, sensor drift or the like.
Owner:MEDTRONIC MIMIMED INC
Integrated circuit with timing adjustment mechanism and method
InactiveUS6950956B2Multiple-port active networksModulated-carrier systemsComputer scienceIntegrated circuit
An integrated circuit device includes a receiver, a register and a clock circuit. The receiver samples data from an external signal line in response to an internal clock signal. The register stores a value that represents a timing offset to adjust the time at which the data is sampled. The clock circuit generates the internal clock signal such that the internal clock signal maintains a controlled timing relationship with respect to an external clock signal. The clock circuit includes an interpolator that phase mixes a set of reference clock signals such that the internal clock signal is phase offset in accordance with the value.
Owner:RAMBUS INC
High frequency array ultrasound system
ActiveUS20070239001A1Time indicationSynchronous motors for clocksPhased array transducerLinear arrays
A system for acquiring an ultrasound signal comprises a signal processing unit adapted for acquiring a received ultrasound signal from an ultrasound transducer having a plurality of elements. The system is adapted to receive ultrasound signals having a frequency of at least 20 megahertz (MHz) with a transducer having a field of view of at least 5.0 millimeters (mm) at a frame rate of at least 20 frames per second (fps). The signal processing can further produce an ultrasound image from the acquired ultrasound signal. The transducer can be a linear array transducer, a phased array transducer, a two-dimensional (2-D) array transducer, or a curved array transducer.
Owner:SUNNYBROOK HEALTH SCI CENT +1
Noise checking method and apparatus and computer-readable recording medium which records a noise checking program
InactiveUS7158920B2Reduce amount and correctionWork lessSpectral/fourier analysisNoise figure or signal-to-noise ratio measurementLimit valueComputer science
The apparatus reduces the amount of correction for noise value error, so as to reduce work needed for correction to ensure error avoidance, and to improve the freedom of layout design, and to reduce load on DA. Based on a timing chart of signal transfer on each wire, the last edge appearance timing in the signal waveform of a victim whose noise value exceeds a limit value is compared with the last edge appearance timing in the signal waveform of an aggressor, to evaluate the noise value error in the victim. The apparatus is used in static noise checking of cell arrangement and inter-cell wiring after such cell arrangement and inter-cell wiring are performed at design of integrated circuits such as LSIs.
Owner:FUJITSU LTD
Event occurrence graph
Owner:KOODALI ANURAG T
Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply
ActiveUS7362593B2Save power consumptionLight load conditionEfficient power electronics conversionDc-dc conversionAudio power amplifierControl signal
A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifier amplifies the voltage-feedback signal and generates a control signal. An off-time modulator correspondingly generates a discharge-current signal and a standby signal in response to the control signal and an under-voltage signal. The under-voltage signal indicates a low supply voltage of the controller. An oscillator produces a pulse signal in response to the discharge-current signal. The pulse signal determines the off-time of the switching signal. A PWM circuit generates the switching signal in response to the pulse signal and the standby signal. The standby signal further controls the off-time of the switching signal and maintains a minimum switching frequency. The switching signal is used for regulating the output of the power supply.
Owner:FAIRCHILD SEMICON CORP
Methods and systems for observing sensor parameters
InactiveUS20100169035A1Resistance/reactance/impedenceCurrent/voltage measurementVoltage pulseEngineering
The invention disclosed herein provides methods and materials for observing the state of a sensor, for example those used by diabetic patients to monitor blood glucose levels. Typically a voltage such as a voltage pulse is applied to the sensor in order to solicit a current response from which for example, factors such as impedance values can be derived. Such values can then be used as indicators of a sensor's state, for example the state of sensor hydration, sensor noise, sensor offset, sensor drift or the like.
Owner:MEDTRONIC MIMIMED INC
Communication method and system
ActiveUS20080150514A1Increase network capacityCooperate fullySite diversityReceivers monitoringPhase correctionCommon base
There is provided a method comprising: determining a phase difference between at least two antenna units of a distributed antenna system on the basis of at least one pilot signal received from at least one of a plurality of antenna units; and transmitting phase correction commands to a common base station of the plurality of antenna units on the basis of the determined phase difference in order to synchronize carrier phases between at least two antenna units of the distributed antenna system.
Owner:WSOU INVESTMENTS LLC
Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supply
ActiveUS20060055433A1Save power consumptionLight load conditionEfficient power electronics conversionDc-dc conversionControl signalSwitching frequency
A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifier amplifies the voltage-feedback signal and generates a control signal. An off-time modulator correspondingly generates a discharge-current signal and a standby signal in response to the control signal and an under-voltage signal. The under-voltage signal indicates a low supply voltage of the controller. An oscillator produces a pulse signal in response to the discharge-current signal. The pulse signal determines the off-time of the switching signal. A PWM circuit generates the switching signal in response to the pulse signal and the standby signal. The standby signal further controls the off-time of the switching signal and maintains a minimum switching frequency. The switching signal is used for regulating the output of the power supply.
Owner:FAIRCHILD SEMICON CORP
Circuit and method for measurement of battery capacity fade
InactiveUS6892148B2Accurately indicatedReduce eliminateBatteries circuit arrangementsResistance/reactance/impedenceLower limitElectrical battery
The remaining run-time (t_rem) of a battery is determined independently of the condition of the battery and the amount of load on the battery by obtaining the value of a present total zero-current capacity (Qmax) of the battery based on relaxed-battery OCV values measured just before and just after a charging or discharging cycle. A current through the battery is integrated to determine a transfer of charge (Q) from the battery, and a value of total run-time (t_total) that would be required to reduce the open circuit voltage of the battery to a predetermined lower limit (Vmin) is determined. The remaining run-time (t_rem) is determined by subtracting the duration of the integrating from the total run-time (t_total).
Owner:TEXAS INSTR INC
Networked Battery Monitors
ActiveUS20090144001A1Low costCurrent/voltage measurementResistance/reactance/impedenceModem deviceIp address
A battery monitoring system for simultaneously managing the batteries in 100 or more remote locations, each of said locations comprising a battery string with 100 or fewer cells, said system comprising:a. an individual battery monitor operatively engaged with at least one of said cells;b. a network access module in communication with said battery monitor, said network access module comprising a modem compatible with an M2M data communication protocol, said protocol comprising assigning a variable IP address to said network access module modem upon initiation of a connection to a battery manager; andc. said battery manager comprising a fixed IP address that can be connected to via said M2M data protocol upon said initiation of said connection,wherein said network access module is programmed to periodically transfer battery monitor data, including ohmic measurements, to said battery manager at a frequency of not less than once per week and with a total rate of data transfer of not more than 1 Mb per month.
Owner:BTECH INC
Method and apparatus for reading and controlling electric power consumption
ActiveUS7263450B2Avoid the needElectric devicesTariff metering apparatusGraphicsCommunications system
Owner:TRENDPOINT SYST
Monitoring and representing complex signals
Owner:SALK INST FOR BIOLOGICAL STUDIES
Method and apparatus for anti-islanding of distributed power generation systems
InactiveUS20090021877A1Noise figure or signal-to-noise ratio measurementApparatus with intermediate ac conversionIslandingPhase shifted
A method and apparatus for anti-islanding of distributed power generation systems having an inverter comprising a phase locked loop (PLL), a phase shift generator for injecting a phase shift into the PLL during at least one sample period, and a phase error signature monitor for monitoring at least one phase error response of the PLL during the at least one sample period.
Owner:ENPHASE ENERGY
Method and arrangement for detecting load mismatch, and a radio device utilizing the same
ActiveUS6965837B2Reduce lossesAccurate and reliable detectionResonant long antennasResistance/reactance/impedenceRadio equipmentEngineering
A method and an arrangement for detecting impedance mismatch between an output of a radio frequency amplifier (200, 901, 911, 921, 1101) which has an amplifying component (201, 301, Q46, 701, 801) and an input of a load (203, 302) coupled to the output of the radio frequency amplifier having: first monitoring means (401) to monitor a measurable electric effect (311) at a side of the amplifying component (201, 301, Q46, 701, 801) other than the load (203, 302) and to produce a first measurement signal (411). Second monitoring means (402) monitor a measurable electric effect (312) between the amplifying component (201, 301, Q46, 701, 801) and the load (203, 302) and produce a second measurement signal (412). Decision-making means (204, 902, 912, 923, 1102) receive said first (411) and second (412) measurement signals and decide, whether said first and second measurement signals together indicate impedance mismatch.
Owner:III HLDG 3
Protective relay with synchronized phasor measurement capability for use in electric power systems
InactiveUS6845333B2Current/voltage measurementResistance/reactance/impedenceDigital protective relayEngineering
The relay system obtains voltage and current values from a power line and uses a first sampling element to sample the voltage and current values at selected intervals of time. The resulting sampled signals are used for power system-wide protection, control, monitoring and metering. The sampled signals are then resampled at a rate which is a selected multiple of the power system frequency. The results of the resampling are used by processing circuitry for protection functions including fault determinations.
Owner:SCHWEITZER ENGINEERING LABORATORIES
Method and apparatus for testing circuit boards
ActiveUS7188037B2Shorten the timeHigh-precision detectionResistance/reactance/impedenceError detection/correctionElectrical conductorPath network
The invention provides a method of apparatus for testing circuit boards which does not require any inner wide power plane so as to detect an open circuit defect and / or a short circuit defect in a conductor path network formed in the circuit board quickly and accurately. An apparatus for testing a circuit board according to the present invention includes a transmission unit (2) for transmitting electromagnetic (radio) wave signal by way of an antenna (1) to a circuit board (3) to be tested, a detecting unit (3) for detecting signal received by a conductor path (4) of the circuit board (3) by using the conductor path (4) as a receiving antenna, and compare unit (8) for determining whether or not there is an open circuit defect or a short circuit defect in the conductor path (4) by comparing the detected signal with reference data of corresponding to a conductor path not including any defect.
Owner:MICROCRAFT
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