Abstract: A receiver is for measuring the output noise of a device-under-test (DUT). The receiver includes an input port configured to connect to an output of the DUT, first and second measurement channels, and a cross-correlation circuit. The first measurement channel includes a first amplifier, a first mixer, a first local oscillator (LO), and a first analog-to-digital converter (ADC). The second measurement channel includes a second amplifier, a second mixer, a second local oscillator (LO), and a second analog-to-digital converter (ADC). A second LO frequency is different than a first LO frequency. The cross-correlation circuit is configured to cross-correlate sample values obtained from the first and second measurement channels to obtain the output noise of the DUT.

Abstract: Systems and methods are disclosed to control the power grid frequency by capturing the frequency change using an extended Kalman filter method with the distributed smart outlet devices at the low-voltage distribution level; and locally control the relay that provides power to the appliance by comparing the captured frequency with the threshold sent from the cloud control center.

Abstract: A drop-detection device (11, 11a, 11b) for the detection of drops (TR) that escape from a nozzle of a metering valve (DV), preferably a micro-metering valve, is described. The drop-detection device (11, 11a, 11b) comprises a signal-generation unit (20), which is configured to produce a carrier signal (TS) with a defined pulse frequency. In addition, the drop-detection device (11, 11a, 11b) has a modulation unit (30, 30a) which is configured to generate a modulated signal (MS) due to a physical interaction of the carrier signal (TS) with a drop to be detected (TR), Furthermore, the drop-detection device (11, 11a, 11b) has an evaluation unit (50), which is configured to determine if a drop (TR) has been dispensed by the metering valve (DV) based on the measurement signal (MS) under consideration of the defined pulse frequency. A method (600) of detecting a drop (TR) of a metering valve (DV) is also described.

Abstract: Systems and methods are provided for blended analog-to-digital conversion for digital test and measurement devices. A first-frequency-domain circuit path is configured to generate a first processed digital signal having high fidelity to an analog signal over a first frequency domain. A second-frequency-domain circuit path is configured to generate a second processed digital signal having high fidelity to the analog signal over a second frequency domain. A blended digital signal is generated using the first processed digital signal and the second processed digital signal. The blended digital signal can have high fidelity to the analog signal over multiple frequency domains.

Abstract: A count value generation circuit includes a first counter that counts edges of a reference signal to generate a first count value in synchronization with an input signal, a time digital value generator that generates a time digital value corresponding to a phase difference between the reference signal and the input signal, a count integrated value combiner that outputs a difference between an integer multiple of the first count value and the time digital value, and a count value generator that generates a count value based on a difference between a first output value and a second output value output from the count integrated value combiner.

Abstract: A system includes a real-time computer having a real-time clock programmed to output a clock signal, a binary clock display programmed to display a first amount of time that has elapsed according to the clock signal, a host computer programmed to simulate a virtual environment including a virtual clock display programmed to represent a second amount of time that has elapsed according to the clock signal, and a latency processor programmed to calculate latency of the host computer based on a difference between the first amount of time and the second amount of time.

Abstract: A technique relates to a microwave device. A pump resonator, at a first pump resonator end, is connected to both a dispersive nonlinear element and a first stub. The pump resonator, at a second pump resonator end, is capacitively coupled to a pump port, where the first stub is terminated in an open circuit. A quantum signal resonator, at a first quantum signal resonator end, is connected to both the dispersive nonlinear element and a second stub. The quantum signal resonator, at a second signal resonator end, is capacitively coupled to a signal port, where the second stub is connected to ground.

Abstract: To provide a phase noise optimization device and a phase noise optimization method which are capable of automatically measuring optimum phase noise according to an offset frequency. There is included a phase noise data generation unit 28 that generates at least two types of phase noise data corresponding to at least two low-pass filters (LPFs) 15a and 15b selected by a filter selection unit 16 in at least one measurement frequency range, set in advance, out of a plurality of measurement frequency ranges, a comparison unit 29 that compares at least two types of phase noise data, and a phase noise optimization unit 30 that generates optimized phase noise data based on a comparison result of the comparison unit 29.

Abstract: A wireless mesh network is configured to manage a power grid. Each node within the wireless mesh network is configured to detect and classify voltage fluctuations in power supplied by an upstream transformer coupled to the power grid. When a given node detects a particular type of fluctuation (i.e., an “event”), the node generates a timestamped event classification that reflects the type of event and a time when the event occurred. A server configured to manage the wireless mesh network receives timestamped event classifications from each node within the wireless mesh network and then performs a time correlation with the received timestamped event classifications to determine which nodes detected similar events. When two or more nodes detected the same event at similar times, the server determines that those nodes are coupled to the same transformer.

Abstract: A phase difference detector detects the phase difference between two AC signals at a high speed and with high accuracy. A phase difference computation unit computes the phase difference ?r(=?2??1) between two detected voltages v1 (phase angle: ?1) and v2 (phase angle: ?2). The phase difference computation unit uses a sine wave vs and a cosine wave vc generated separately and having the same frequency as the fundamental frequency of the voltages v1 and v2, to perform computation of v2s=v2×vs, v2c=v2×vc, v1s=v1×vs, v1c=v1×vc, and then extracts DC components I2=(?A2/2)·sin(?2), R2=(A2/2)·cos(?2), I1=(?A1/2)·sin(?1), R1=(A1/2)·cos(?1) at low-pass filters. The phase difference computation unit computes R3=R1×R2+I1×I2 at a complex multiplying unit to obtain R3=(A1·A2/4)·cos(?r), computes I3=R2×I1?R1×I2 to obtain I3=(A1·A2/4)·sin(?r), and computes ?r=tan?1(I3/R3) at the arctangent calculation unit, thereby obtaining the phase difference ?r.

Abstract: A phase locking system for a three-phase alternating current (AC) electric grid and a method thereof are disclosed. The method includes: receiving a three-phase voltage of the AC electric grid and converting the three-phase voltage to a two-phase voltage signal, each of which including a positive and a negative sequence components; obtaining a pure positive sequence component by subtracting the negative sequence component from the voltage signal of each phase and using ??/dq coordinate transformation and low-pass filtering, and phase locking the pure positive sequence component; and obtaining an error signal by subtracting a disturbance variable and subsequently subtracting the positive sequence component from the voltage signal of each phase, wherein the disturbance variable includes the negative sequence component, and obtaining a signal including the negative sequence component by performing a ?-?/d-q coordinate transformation on the error signal and adjusting the error signal through a regulator.

Abstract: A method and apparatus for controlling of ski vibration consisting an accelerator/actuator sub-system attached to the ski and a adaptive vibration control application residing in the user smart-phone and communicating with the accelerometer/actuator sub-system over Bluetooth radio interface is disclosed. The adaptive vibration control application extracts vibration frequencies and amplitudes from signal received from an accelerometer, separates such frequencies according to their types—bending or torsional, and after thresholding and scaling by the ski calibration parameters and by the user desired ski response, apply such signal to the control loop and consequently to the actuators to provide vibration dampening force. In one embodiment, such actuators are attached to the ski, while in another embodiment such actuators are embedded into the ski.

Abstract: System for adaptive control and release of ski bindings comprising a smart-phone based application performing calculation of forces applied to the ski-binding system by analyzing acceleration vectors received from accelerometers embedded in the bindings, then instantaneously releasing both bindings if one or more of the predefined safety thresholds was exceeded.

Abstract: Method for avoiding voltage instability in an electrical grid of an offshore wind park, the offshore wind park electrical grid being connected at a first end of a high voltage alternating current (HVAC) transmission and the main land electrical grid being connected at a second end of the HVAC transmission, each of the wind turbines being connected to the wind park electrical grid, the method comprises determining a main land phase angle at or near the second end of the HVAC transmission; measuring an individual wind turbine phase angle at one or more wind turbines; determining the difference between each of the measured individual wind turbine phase angles and the main land phase angle; and determining whether the difference between one of the measured individual wind turbine phase angle and the main land phase angle exceeds a threshold phase angle difference.

Abstract: A method and system are provided for determining a length quantity of a power transmission line, which connects a first location with a second location. A first signal having a first carrier frequency is provided at the first location. The first signal is transmitted from the first location to the second location via the power transmission line. A second signal having a second frequency is provided at the second location. A first phase difference between the first signal and the second signal is measured at the second location, and the length quantity is calculated from the measured phase difference. In the system, a second receiver at the second location is configured to receive the first signal having the first carrier frequency from the first location. A frequency generator creates the second signal having the second frequency at the second location.

Abstract: A display apparatus includes a display panel, a light source part, a light source driving part and a used time calculation part. The light source part includes a light source providing the display panel with lights. The light source driving part includes a boost part outputting a light source driving voltage and a light source driving chip controlling the boost part. The used time calculation part detects an initial drive time during which an initial driving voltage is supplied to the light source driving chip and a normal drive time during which a normal driving voltage is supplied to the light source driving chip, and calculates a used time of the light source by using the initial drive time and the normal drive time. Thus, a real used time of a light source may be provided to correctly estimate lifetime of a light source.

Abstract: An on-chip timing slack monitor that measures timing slack at the end of a critical path includes a master-slave flip-flop having a tap on the Q output of the master and a logic module coupled to the flip-flop for producing a pulse whose width is a function of the slack. A pulse width shrinking delay line removes glitches on the flip-flop output and, in combination with a digital integrator and counter, also performs a time to digital conversion operation for determining a value for timing path slack. The determined value is used by a decision module for yield analysis. The monitor can discriminate a glitch from a slack pulse at the flip-flop output for any width of glitch up to one-half of a clock cycle.

Abstract: Described herein are methods, systems, apparatuses and products for phase determination in an electricity grid. An aspect provides for determining phase for at least one electric grid device via receiving power consumption measurements derived from electricity grid devices connected in the electricity grid, comparing, over a series of time intervals, a total power consumed; and determining a phase for at least one electricity grid device.

Abstract: Disclosed is a probe for an oscilloscope comprising a multi-stage transistor amplifier that acts as an impedance transformer. Said amplifier is a d.c.-coupled emitter follower circuit that is composed of bipolar transistors or a d.c.-coupled source follower circuit which is composed of field effect transistors and the successive amplifier elements of which are dimensioned and tuned to each other in such a way that the resulting offset direct voltage between the input and the output is minimal.

Abstract: A phase-to-phase insulation partial discharge inspection apparatus includes: an impulse power supply (1) configured to apply an impulse voltage having a voltage rise time period tr which satisfies an expression “tr>(?coil·Vmax)/(PDIV)” to a rotary electric machine (2); a measurement section (12) configured to measure partial discharge which occurs when the impulse voltage is applied to the rotary electric machine (2); and a decision section (15) configured to determine that, when partial discharge is not measured by the measurement section (12), a phase-to-phase insulation performance is acceptable. In the expression, ?coil is a surge propagation time period of one coil of a rotary electric machine winding, PDIV a partial discharge inception voltage between winding turns, and Vmax a peak of a partial discharge testing voltage for the phase-to-phase insulation.

Abstract: An exemplary method and arrangement for estimating the frequency and the positive sequence of a fundamental component of a measured three-phase voltage are disclosed (???).

Abstract: This disclosure provides a phase measuring device that can measure phase differences with high precision using the digital circuits. A phase measuring device includes a buffer delay measuring circuit and a phase difference measuring circuit which use a TDC, respectively, and a phase difference calculator. The buffer delay measuring circuit generates delay measurement data indicating a delay amount ?B between the buffers of the TDCs based on a highly precise clock signal and a sampling reference signal. The phase difference measuring circuit generates a number data row indicating a phase difference between measuring signals SS(A) and SS(B), and first and second phase difference measuring data Ds(A) and Ds(B), using the clock signal.

Abstract: A method, a system, and an apparatus are described for the data acquisition in the well-logging of a borehole wall during the investigation of formation properties. Data acquisition is conducted by either an adaptive phase compensation processing or a modulus mode processing, both of which use in-phase and out-of-phase current components to obtain current values. Adaptive phase compensation employs a calculation of a phase shift compensation value, which may then be applied to subsequent acquisitions and can be further processed in the generation of an image of the borehole wall.

Abstract: A method for measuring an enhanced electromagnetic field response, especially in a submarine environment, for the purposes of subsurface data acquisition and processing. An electromagnetic field is applied to subterranean strata at two or more different frequencies, a response at each frequency is detected, and the responses at different frequencies are resolved. The differences in the phase and/or amplitude of the responses are analyzed and the nature of the strata is determined. The same method can be used to determine the hydrocarbon content of a reservoir via the use of a borehole.

Abstract: In one embodiment, a requesting device (e.g., head-end application) requests a phase-related response from an end-point that does not know its phase in a polyphase power source system. In response, the requesting device receives the phase-related response from the end-point, where the response relays an identification of the end-point and related phase information without indicating an actual phase of the end-point, e.g., on which power-line is a response generated or at which time is a zero-crossing of the power source's waveform. The phase information of the phase-related response may then be correlated to a known phase of a known-phase device, such that the actual phase of the end-point may be identified based on the correlation.

Abstract: Methods and apparatus for digital demodulation of signals obtained in the measurement of electrical bioimpedance or bioadmittance of an object. One example comprises: generating an excitation signal of known frequency content; applying the excitation signal to the object; sensing a response signal of the object; sampling and digitizing the response signal to acquire a digitized response signal representing the response signal with respect to frequency content, amplitude and phase; correlating, for each frequency fAC of the excitation signal applied, digitized samples of the response signal, with discrete values representing the excitation signal; calculating, using the correlated signals for each frequency fAC of the excitation signal applied, complex values for the bioimpedance Z(fAC); providing, over time, a set of digital bioimpedance waveforms Z(fAC,t)); separating the base bioimpedance Z0(fAC), from the waveforms; and separating the changes of bioimpedance ?Z(fAC,t), from the waveforms.

Abstract: Described herein are embodiments of methods and systems of phase identification.

Abstract: A controller for a brushless motor that includes an input for receiving an analog signal, an analog-to-digital converter (ADC) for sampling the analog signal, and a processor. The processor starts the ADC during a first electrical half-cycle and reads the ADC during a second electrical half-cycle of the motor. Additionally, a motor system that includes the controller.

Abstract: A method of estimating the time of flight of a burst signal includes: receiving the burst signal; determining the slope of the phase characteristic of the Fourier transform of the received burst signal; and estimating the time-of-flight of the burst signal from the slope of the phase characteristic of the Fourier transform of the received burst signal.

Abstract: A phase identification system is proposed. The system includes a sensor coupled to a terminal of a distribution transformer. A processor is coupled to the sensor for processing phase information of the terminal, wherein the sensor and the processor are embedded within a bushing unit on the distribution transformer. The processor is further configured to identify and display phase information at the distribution transformer.

Abstract: A computer-implemented method can include determining an amplitude for each of a plurality of input channels, corresponding to respective nodes. A measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. The method can also include comparing an amplitude for each node relative to other nodes to determine temporary bad channels. For each of the temporary bad channels, a measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. Channel integrity can then be identified based on the computed measures of similarity.

Abstract: A personal mobile device housing contains a display screen, a wireless telephony communications transceiver, and a battery charger interface. A temperature sensor and a gyro sensor whose zero turn rate output contains an offset are also included. A lookup table has gyro zero turn rate offset correction values associated with different temperature values. A programmed processor accesses the lookup table to correct the output of the gyro sensor for zero turn rate offset. It is automatically determined, during in-the-field use, when the device is in a motionless state, and the output of the temperature and gyro sensors are read. The read gyro output is written to the lookup table as part of a pair of associated temperature and zero turn rate offset correction values. Other embodiments are also described and claimed.

Abstract: A phase identification system identifies the unknown phase attribute of any energized conductor within a three-phase power distribution network by comparing remote location non-contact phase identification instrument phase measurements to phase measurements taken at a reference location. The vector sum of three-phase conductor voltages at the remote measurement location are used to determine the near, center, and far conductor phase attributes of the three-phase lines being measured. This allows phase attributes of high overhead conductors to be determined from ground level using a non-contact handheld instrument.

Abstract: A method for estimating and tracking locally oscillating signals. The method comprises the steps of taking measurements of an input signal that approximately preserve the inner products among signals in a class of signals of interest and computing an estimate of parameters of the input signal from its inner products with other signals. The step of taking measurements may be linear and approximately preserve inner products, or may be non-linear and approximately preserves inner products. Further, the step of taking measurements is nonadaptive and may comprise compressive sensing. In turn, the compressive sensing may comprise projection using one of a random matrix, a pseudorandom matrix, a sparse matrix and a code matrix. The step of tracking said signal of interest with a phase-locked loop may comprise, for example, operating on compressively sampled data or by operating on compressively sampled frequency modulated data, tracking phase and frequency.

Abstract: A remote phase identification system identifies the unknown phase attribute of any energized conductor within a three-phase power distribution network. A field probe at a remote location obtains an instantaneous phase measurement at a precise GPS second and communicates this phase, GPS second, and GPS coordinates to a field client. Either wireless Internet or satellite modem communications is used by the field client to retrieve the reference phase taken by a base station at the same GPS second. Field client tagging reference phase configuration files are automatically created for any circuit and applied to the base station reference phase. Configuration files can be named, saved, and loaded and are used by the field client to identify and display the unknown phase attribute. A field client can be any personal computer, smartphone, or personal digital assistant.

Abstract: Systems and methods for editing digital audio data are provided. In one implementation, a method is provided that includes receiving digital audio data. The computer implemented method includes receiving digital audio data and displaying a representation of the digital audio data. The method also includes receiving a selection including a portion of the digital audio data, analyzing a feature of the audio data for the selected portion with respect to a plurality of frequency bands in the digital audio data, calculating a feature value for each frequency band over a specified period of time, and using the feature value for each frequency band to adjust the feature of the audio data.

Abstract: An apparatus for modulating an incident beam includes a body that is non-transmissive and rotatable about an axis perpendicular to a surface of the body. The body has a first set of features including transmissive features with respect to the incident beam along a first radial path at a first radial distance from the axis and a second set of features including data storage features along a second radial path at a second radial distance from the axis. The apparatus also includes a reference sensor disposed over a first position along the second radial path. In the apparatus. the radial distances are different and the numbers of transmissive features and data storage features are relatively prime. When the body is rotating, the first set of features modulate the incident beam and the reference sensor generates a reference signal based on the data storage features traversing the first position.

Abstract: To provide a signal generator, a signal generating system, and a signal generating method capable of repeatedly generating an arbitrary waveform and making the phases of the head and tail of the generated waveform continuous with each other, without changing the frequency of the waveform. A signal generator (10, 11, 12) includes phase shift means (30) that receives waveform data which is repeatedly output n times, shifts the phase of each sample data item in an n-th waveform data item by a phase shift amount ?n corresponding to the number of times n the waveform data is repeatedly output, and outputs the waveform data to D/A conversion means.

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.

Abstract: A measuring apparatus is capable of separately measuring at least one of the purely resistive component and the reactance component of a measured circuit. The measuring apparatus applies an AC voltage to the measured circuit and detects a current flowing in the measured circuit. When doing so, a first detection signal whose amplitude changes in accordance with an amplitude of a real component of the current and a second detection signal whose amplitude changes in accordance with an amplitude of an imaginary component are generated. The at least one of a purely resistive component and a reactance component of the measured circuit is then calculated using the first detection signal and the second detection signal.

Abstract: A method of monitoring a capacitor bank comprising a plurality of capacitor strings connected in parallel, each capacitor string comprising a plurality of capacitors connected in series is provided. The method includes energizing the capacitor bank. The method includes determining dissipation factors of each of the plurality of the capacitor strings. The method further includes comparing each of the determined dissipation factors with an expected dissipation factor and estimating a health state of the plurality of the capacitor strings based, at least in part, on the comparison of the determined and expected dissipation factors.

Abstract: The apparatus corrects multi-phase signals for detecting a position of an object and obtains a phase corresponding to the position of the object. The apparatus includes a correcting unit correcting the multi-phase signals with error coefficients, respectively, a phase calculating unit performing calculation for the corrected multi-phase signals to obtain the phase, a regression unit performing regression for the calculated phases to obtain reference phases, a Fourier transform unit respectively performing Fourier transform for the corrected multi-phase signals whose phases having been respectively changed into the reference phases, and an updating unit updating, using Fourier coefficients obtained by the Fourier transform unit, the error coefficients respectively corresponding to the Fourier coefficients. The updating unit updates the error coefficients if a regression error in the regression performed by the regression unit satisfies a predetermined condition.

Abstract: A method for monitoring a power grid uses power line sensors to measure time-stamped data representing AC current carried by the power grid at a multiple locations on the power grid, communicates the measured data from the power line sensors to a grid analysis device where the data measured by the power line sensors is synchronized and unwrapped to produce absolute phase data. The absolute phase data is then analyzed to generate predictions of instability of the power grid. The resulting unwrapped angle could also be called the “angle distance” from the reference.

Abstract: A method for determining and/or monitoring a process variable of a medium, wherein a mechanically oscillatable unit is supplied with an exciter signal wherein a received signal coming from the mechanically oscillatable unit is received, and wherein the exciter signal is produced in such a manner, that a phase difference between the exciter signal and the received signal equals a predeterminable phase value. A criterion for judging the determining of the phase difference between the exciter signal and the received signal, or a signal dependent on the exciter signal or on the received signal, is established; in the case, in which the criterion for judging the determining of the phase difference is fulfilled, tuning of the phase difference is closed-loop controlled; and, in the alternative case, tuning of the phase difference is open-loop controlled. An apparatus associated with the method is also disclosed.

Abstract: According to one embodiment, a protective relaying device includes a phase difference calculating unit configured to calculate a phase difference between a phase obtained by shifting a phase of first current data by 180°, and a phase of second current data, a setting unit configured to calculate a target value of elimination of a sampling synchronization error caused by a difference between a transmission delay time of up-transmission, and a transmission delay time of down-transmission on the basis of the phase difference, and to set the calculated target value, and a sampling synchronization control unit configured to carry out control of sampling synchronization such that a difference between a time TM and a time TF.

Abstract: A method, device and computer program product for determining at least one property of a current (Ip) running through the primary winding of a transformer operating in saturation using an unreliable detected current (Is) running through the secondary winding of the transformer. According to the invention a first reliable extreme point (EP1) of a cycle of the current in the secondary winding is detected and compared with an absolute time reference. Based on the comparison a first property of the current running through the primary winding in the form of the phase angle is then determined.

Abstract: A communication device, for connecting one or more electrical appliances to a remote service centre, comprises a control unit (AMC), means (PLG) for connecting the device (HG) to an alternating voltage electric mains network (Vac) and means (SK) for supplying the alternating mains voltage (Vac) to a power supply line of an electric appliance. The device (HG) further comprises first communication means (CSA), prearranged for receiving information possibly generated by the electric appliance and transmitted through the power supply line thereof, second communication means (ZB), prearranged for establishing a connection with a local area network (HN1) and third communication means (GGM), prearranged for establishing a connection with a further communication network, different from the local network (HN1), to which the remote service center is connected.

Abstract: Provided is a test apparatus that tests a device under test, having two operational modes which are (i) an edge strobe mode in which the test apparatus judges acceptability of a value of an output signal from the device under test at sequentially designated reference timings, based on expected value information, and (ii) a multi-strobe mode in which the test apparatus judges the acceptability of values of the output signal at a plurality of strobes for each reference timing, based on expected value information, the plurality of strobes being generated based on the reference timing, and comprising a conversion control section that converts an expected value pattern supplied thereto into expected value information to be used in the edge strobe mode or into expected value information to be used in the multi-strobe mode, depending on which of the edge strobe mode and the multi-strobe mode is selected.

Abstract: Described herein are embodiments of methods and systems of phase identification.

Abstract: Disclosed are a method and an NDT/NDI inspection device deploying digital circuitry to conduct detection and compensation of phase and amplitude shift in responding signals. A digital waveform generator, such as a direct digital synthesizer (DDS) is used to generate a digital sine-wave of a specific frequency and amplitude, mimicking the pulser frequency and amplitude. The sine-wave is converted to analog signal through a DAC and transmitted to the transducer. The received analog sine-wave from the transducer is converted back to a digital signal through an ADC. The transmitted and received digital signals are then compared for phase and amplitude differences. A null circuit involving another waveform generating component is employed to compensate the detected phase and amplitude differences. As a result the phase and amplitude differences are effectively eliminated before being further processed and analyzed for defects information.