52 results about "Waveform monitor" patented technology

The optical transmitter has a feature that the transmitter comprises a light-emitting device, an optical splitter, a dispersion controller including a first dispersion generator and a waveform monitor, and a processing unit. The optical splitter splits light emitted from the light-emitting device, and guides one of split light into the first dispersion generator. The first dispersion generator adds dispersion, an amount of which is predefined by the processing unit so as to reflect dispersion of the optical path to the receiving station, to the split light and outputs dispersed light to the waveform monitor. The processing unit maintains the dispersed light output from the dispersion generator to have a predetermined quality.

The purpose of the present invention is to provide a power transmission device capable of highly accurate discrimination between a device placed on a secondary side and a foreign object without additional complex circuitry. The power transmission device comprises: a control unit (5a) for setting the drive frequency of a signal which drives a resonant circuit; an inverter unit (2) for driving the resonant circuit at three or more drive frequencies on the basis of the settings of the control unit (5a); and a waveform monitoring unit (4) for detecting the drive waveform of the resonant circuit. The control unit (5a), in accordance with the procedures of a program stored in a storage unit (5b), sets the three or more drive frequencies, compares signal data in each drive frequency detected by a drive waveform detection unit, and detects a power receiving device (50) on the basis of the comparison results.

An object of the present invention is to adjust the operating wavelength of a decoder, in order to coordinate the operating characteristics of an encoder and the decoder. To this end, an optical code division multiplex transmission device of the present invention comprises a second SSFBG in the decoder, and has a mechanism to perform adjustment (phase adjustment step) of the fixation portion interval L which is the interval between a first and second fixation portions fixing in place the second SSFBG, such that the extent of the eye opening of optical pulses output from the second SSFBG is maximum. The extent of the eye opening is measured using a correlation waveform monitor, and the measurement data is sent to the wavelength control portion. A signal is sent from the wavelength control portion to the movement control portion to set the fixation portion interval L, based on data relating to the extent of the eye opening sent from the correlation waveform monitor.

A system and method for automatic measurement of video parameters for a video sequence using a video processor that has a software waveform monitor implemented as an integral part of a video processing application run by the video processor. Each frame of the processed video sequence, either in realtime as processed by the video processor, in near realtime after storage by the video processor in a storage device, or in the background for each video sequence stored in the storage device, is analyzed against specified parameters for legalization and / or color balancing of the video sequence. The analysis results may be reported as a display in several forms—an error image map, an error log, a timeline graphic, etc. The analysis results may also be provided to the video processor for automatic correction of the video sequence when the specified parameters are not satisfied.

The invention relates to the technical field of power grid monitoring, and particularly discloses a clock synchronization abnormity monitoring method and device and a computer readable storage medium. The method comprises the following steps: acquiring a voltage sag waveform monitored by each power quality monitoring device in a power grid; screening out homologous voltage sag waveforms from the voltage sag waveforms, wherein the homologous voltage sag waveforms are waveforms corresponding to voltage sags caused by transient disturbance events of the same power grid; and based on the voltage sag starting time of each homologous voltage sag waveform, determining whether clocks among the corresponding power quality detection devices are synchronous and abnormal. Compared with the prior art, the method does not need to compare a large amount of historical data, does not need to depend on manual detection, can achieve the automatic detection of the clock synchronization abnormality according to the waveform data recorded by the power quality monitoring equipment in real time, is good in real-time performance and reliability, is high in monitoring efficiency, and is high in intelligent degree.

A measured optical pulse and a sampling optical pulse having different wavelengths are input to a nonlinear optical effect, that is, (i) a nonlinear optical medium generating four optical wave mixing or three optical wave mixing, and the optical intensity of the wavelength converted light generated by the four optical wave mixing or four optical wave mixing generated in a common portion in time of the two optical pulses is detected, thereby observing the waveform of a measured light, or (ii) a nonlinear optical medium generating mutual phase modulation which generates mutual phase modulation, and the optical intensity of converted light switched using a phase shift by mutual phase modulation generated in a common portion in time is detected, thereby observing the waveform of measured light.

A stochastic system in a waveform monitor reduces the amount of memory used to store waveform data as it is being accumulated. The system produces a high quality trace display using fewer bits of memory by incrementing pixels using stochastic methods. In at least some embodiments, possible memory values are divided into two or more value ranges and an increment percentage is ascribed for each of the value ranges. During operation, first a present stored value is read from the memory store and its ascribed increment percentage for the particular range is selected. Then the present stored value is stochastically incremented based on the percentage for the particular range.

A waveform monitor for generating a modified image from an original image includes a measuring system to select luminance frequency values of the original image that are above a first and a second threshold. A modifier changes selected pixels of the original image that fall above the first and second thresholds. In some embodiments these changed pixels are given a false color as color markers to indicate DOF and areas of sharpest focus of the original image. Methods of modifying images in this manner are also described.

The invention discloses a lightning current impact test device for an intelligent voltage limiter, which comprises a voltage regulator, a test transformer, a silicon stack, a capacitor, a wave-regulating resistor, a wave-regulating inductor, a current divider, a measuring instrument and a voltage divider, wherein the current divider and the voltage divider are connected with the measuring instrument, the test transformer is boosted through the voltage regulator, the secondary side voltage of the test transformer is rectified by the silicon stack and then charges the capacitor, the gap breaks down after the charging is completed, the intelligent voltage limiter is discharged through the wave-regulating resistor and the wave-regulating inductor, the actual current and residual voltage passing through the intelligent voltage limiter are measured through the measuring instrument, and the measured waveform is compared with the waveform monitored by the intelligent voltage limiter. The lightning current impact test device can verify the reliability of the intelligent voltage limiter.

The invention provides a large-current transient characteristic detection device of an electronic current transformer, which includes a controller unit, a transformer, a DC charging power supply and a waveform output unit connected to an ECT test product; the waveform output unit includes a steady-state waveform output unit and a transient waveform output unit; the controller unit includes a charging control module, a phase selection and closing control module, a waveform monitoring module and a waveform adjustment module; the controller unit outputs a signal for adjusting the working state to the electronic device in the waveform output unit to control the waveform output unit Output steady-state waveforms and transient waveforms to ECT samples. Compared with the prior art, the present invention provides a large current transient characteristic detection device of an electronic current transformer, which can accurately adjust the current peak value and decay time constant of the output transient voltage waveform and transient current waveform To meet the detection requirements of different types of electronic current transformer samples.