52 results about "Waveform monitor" patented technology

A non-contact method and apparatus for continuously monitoring a physiological event in a human or animal, such as blood pressure, which involves utilizing a laser-based interferometer system to produce a waveform that is representative of continuous blood pressure in a subject. The invention may preferably utilize a laser Doppler vibrometer which is oriented to produce a laser beam directed toward the subject substantially perpendicular to a skin surface of the subject wherein the skin surface is moveable in response to blood pressure. The vibrometer is sensitive to motion of the skin surface in a direction parallel to the laser beam and produces a signal representative of this motion. By plotting the velocity of the skin surface movement in the direction parallel to the laser beam with respect to time, a waveform is produced that has been found to be representative of the blood pressure waveform and highly defined to thereby permit accurate timing analysis thereof relating to cardiac cycles.

The invention discloses a kind of online supersonic wave detection method and the device for steel track. The device comprises mechanical system, information processing system and the automatic control system, the mechanical system is made up of steel rail guiding mechanism, steel rail guiding and restraining mechanism, multi-crystal supersonic detecting head, speed measuring mechanism, two sets of contacting coupled detecting head landing chassis, detecting frame adjustment mechanism and mark spraying device; information processing system includes digital supersonic wave detection instrument, waveform processing computer and the waveform monitor; the automatic control system includes detecting head landing chassis, mark spraying and speed measuring, made up of closing switch, photoelectric rotary coding device, PLC controller, electricity control computer and the monitor.

A power transmission device in a power transmission system including the power transmission device including a primary coil and a power reception device including a secondary coil, the primary coil being electromagnetically coupled to the secondary coil, to receive in the power reception device AC power transmitted from the power transmission device, comprises a waveform monitor circuit configured to detect an electric potential at one end of the primary coil and output a waveform monitor signal formed by restricting the detected electric potential to an electric potential which is equal to or higher than a ground electric potential; a waveform detection circuit configured to detect a waveform change in the waveform monitor signal input from the waveform monitor circuit; and a data detection circuit configured to detect data transmitted by load change by a load modulation unit in the power reception device based on a result of detection of the waveform change detected by the waveform detection circuit.

The invention provides a large-current transient state characteristic detection device of an electronic current transformer. The large-current transient state characteristic detection device comprises a controller unit, a transformer, a direct-current charging power supply and waveform output units connected with an ECT test product. The waveform output units include a steady state waveform output unit and a transient state waveform output unit, the controller unit comprises a charging control module, a phase-selection switching-on control module, a waveform monitoring module and a waveform adjustment module, and the controller unit outputs signals for adjusting work states to electronic devices in the waveform output units so as to control the waveform output units to output steady state waveforms and transient state waveforms to the ECT test product. Compared with the prior art, the large-current transient state characteristic detection device of the electronic current transformer can accurately adjust current peak values and attenuation time constants of output transient state voltage waveforms and output transient state current waveforms, and accordingly detection requirements of electronic current transformer test products of different models are met.

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 power transmission control device includes a power-transmitting-side control circuit that controls an operation of a power transmitting device, a driver control circuit that controls operations of a first power transmitting driver and a second power transmitting driver, and a waveform detection circuit that performs a waveform detection process based on a monitor signal from a waveform monitor circuit. The first power transmitting driver drives a first node of a primary coil directly, and the second power transmitting driver drives a second node of the primary coil through a capacitor. A switch circuit is provided in the waveform monitor circuit, the switch circuit being situated in a signal path between the primary coil and a low-level power supply potential. The power-transmitting-side control circuit causes the switch circuit to be turned ON / OFF using a switch control signal.

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.

Waveform monitor apparatus of injection molding machine. When a waveform monitor apparatus (1) of an injection molding machine (M) for monitoring an operation waveform at least during molding is configured by mounting the waveform monitor apparatus (1) on the injection molding machine (M) for performing molding according to a specific molding system, a parting opening detecting means (Fp) for detecting change data of a parting opening (Lm) to a time during molding, and an operation waveform displaying means (Fd) for displaying at least change data from a resin filling start (ts) is into a mold (2) to a cooling time termination (te) to of the mold (2), detected by the parting opening detecting means (Fp), on a waveform displaying portion (5) of a screen (4v) on a display (4) attached to a molding machine controller (3) are provided.

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 waveform monitor comprises: means (51) for converting a compressed video signal into uncompressed parallel data; means (33) for converting the parallel data into waveform display data; means (52) for analyzing a transmission status of the compressed video signal and generating analysis data; and means (36) for displaying the waveform display data and the analysis data simultaneously. The waveform monitor can further comprise: means (31) for converting an SDI signal into parallel data; and means (32) for analyzing a transmission status of the SDI signal and generating the analysis data.

The invention provides a large-current synthesis transient state circuit for an electronic current transformer. The large-current synthesis transient state circuit comprises a controller unit, a direct-current charging power supply and a waveform output unit, the waveform output unit is connected with an ECT test product, the controller unit comprises a charging control module, a discharging control module, a waveform monitoring module and a transient state waveform adjustment module, the controller unit is used for controlling the work state of an electronic component in the waveform output unit, and accordingly the waveform output unit is controlled to output transient state voltage waveforms and transient state current waveforms to the ECT test product. Compared with the prior art, the large-current synthesis transient state circuit for the electronic current transformer can accurately adjust current peak values and attenuation time constants of the output transient state voltage waveforms and the output transient state current waveforms, so that detection requirements of electronic current transformer test products of different models are met.

The invention relates to a multifunctional video parameter calibration device, and the device comprises a control module, a waveform generation module, an arbitrary waveform generation card and a display device; the control module is used for receiving parameters input by a user and sending the parameters to the waveform generation module; the waveform generation module is used for generating waveform data of test signals according to parameters input by a user and sending the waveform data to the arbitrary waveform generation card, and the test signals comprise a video test signal, a test signal for waveform monitor calibration, a test signal for vector oscilloscope calibration and a test signal for video analyzer calibration; the arbitrary waveform generation card is used for outputting test signals and is provided with a plurality of signal output channels so as to simultaneously generate multiple paths of test signals; and the display device is used for displaying the waveform of the test signal output by the waveform generation card. The device can replace various instruments and equipment, calibrate various video measuring instruments and realize chroma phase traceability, has strong pertinence, and is convenient and rapid to test.

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 waveform monitor for generating a modified image from an original image includes a brightness measuring system to generate brightness values that are then converted to f-stop equivalents. A selector is used to create a range of f-stop values and a modifier changes the original image for selected pixels that fall within the range of f-stop values. The original image may be modified by replacing or blending certain pixels with colorized pixels, i.e., by falsely coloring the original image. Methods of modifying images in this manner are also described.

The invention discloses a detection method for a resolution ratio of a camera lens. The method comprises a camera, a light source box, a standard video detector and a main system. The method comprisesthe steps of connecting the camera with the light source box and the standard video detector separately, arranging a resolution ratio test card on the standard video detector, connecting the video output end of the main system with a waveform monitor, and connecting the output of the waveform monitor with the standard video detector. The detection method for the resolution ratio of the camera lens provided by the invention has the beneficial effects that the resolution ratio of the lens can be detected, the random signal noise is relatively large, and the smaller the noise mixed in the signalis, the higher the sound quality of played back sound is. Single frequency and pulse interferences are relatively small.

A waveform monitor comprises: means (35) for generating image data including at least waveform display data of a video signal; means (36) for displaying the image data; means (71) for generating moving image data compressed in a predetermined format from the image data; a converter (38) for packetizing the moving image data; and interface means (39) for outputting the packetized moving image data to a network. The waveform monitor can further comprise means (51) for converting a compressed video signal to uncompressed parallel data, the waveform display data is converted from the parallel data.

The automatic test system and method of the on-load performance of a power distribution terminal can be used to solve a technical problem that an existing on-load waveform burr is easy to generate interference on a test result. The system comprises an electronic load meter, a waveform monitor, test software, a database and a multi-equipment switching device. The multi-equipment switching device iscommunicated with the power distribution terminal through an Ethernet. The test software and the database are interacted to store and read data and configuration. The test software and the electronicload meter are communicated through a serial port. The test software, the waveform monitor and the multi-equipment switching device are communicated through the Ethernet. The test software realizes the disconnection and the access of the power distribution terminal through controlling the on and off of the internal circuit of a multi-path switching device so as to realize the automatic testing ofthe on-load performance of the multiple power distribution terminals. In the invention, whether the on-load performance of the equipment accords with a requirement can be automatically determined, and the multi-equipment switching device is used at the same time so as to realize the automatic testing of the multiple equipment and testing efficiency is increased.

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.

A transmission circuit sends a transmission signal from a signal-processing unit to a port. A reception circuit sends a received signal from a port to the signal-processing unit. A waveform monitor, by monitoring the waveform of the transmission signal that is sent to the port from the transmission circuit, generates a feedback signal. A switch unit connects the feedback signal from the waveform monitor to the reception circuit at transmission timing. The signal-processing unit compares the transmission signal with the feedback signal of the transmission signal.

A waveform monitoring apparatus includes a hydraulic cylinder which is incorporated in an injection molding device and ejects a molding material, a sensor which generates pressure data of the hydraulic cylinder, a determinant which forms a measured value waveform based on the pressure data and determines whether the pressure data exceeds a reference pressure waveform by a predetermined range, a marking applier which applies a marking to an excess portion of the measured value waveform determined by the determinant.

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 discloses a low-voltage apparatus short circuit tolerance strength test intelligent protective device comprising a measuring device, a data processing device and a control device; the measuring device is used for real-time measuring of the voltage waveform and current waveform at an incoming end of a test sample and providing a data source for the data processing device; the data processing device is used for determining whether the voltage waveform and the current waveform are abnormal through a current harmonic content abnormality detecting algorithm and according to the voltage waveform and current waveform monitored and collected by the measuring device in real time during the short-circuit test, and outputting a control signal to the control device when an abnormality occurs; and the control device is used to receive the control signal transmitted by the data processing device, control opening of a high-voltage side circuit breaker of the short-circuit test system, and protect the test sample from persistent long-term abnormal voltages or currents, thus avoiding risks such as damages and blasting and protecting the safety of the short-circuit test system and testpersonnel.

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.

Disclosed are a system and a method of detecting a partial discharge position. The system comprises: a partial discharge sensor detecting an electromagnetic partial discharge signal; a waveform monitor measuring a waveform of a partial discharge signal detected by the partial discharge sensor; a conversion module converting the waveform and dividing the partial discharge signal according to each transmission mode; and a calculation module calculating a distance between the partial discharge sensor and the partial discharge position through an arrival time and a frequency of the divided partial discharge signal.