348results about "Digital variable/waveform display" patented technology

The invention discloses a wire drawing machine operation state evaluation method and system based on deep learning, and relates to the technical field of intelligent manufacturing, and the method comprises the steps: deploying a multi-source sensor at a preset part of a wire drawing machine, and forming a multi-dimensional operation data flow; the deep learning evaluation model is trained based on the standardized time series data set, model parameters are optimized through a cross entropy loss function, the model learns the characteristic difference between a normal working condition and an abnormal working condition, and the deep learning evaluation model is trained based on the standardized time series data set. And inputting a multi-dimensional operation data flow collected in real time into the trained deep learning evaluation model to generate a dynamic evaluation report. According to the wire drawing machine operation state evaluation method and system based on deep learning provided by the invention, a visual operation state score can be output, detailed fault type probability distribution is given, and intelligent support is provided for equipment maintenance decision.

The invention, which belongs to the technical field of electromagnetic signal monitoring, relates to a rapid judgment method for a spatial spill electromagnetic signal, and the method specifically comprises the following steps: S1, receiving a spill electromagnetic signal in a space; s2, dividing the monitoring total frequency band into a plurality of sub-frequency bands with the same width, rapidly analyzing the obtained electromagnetic signal frequency spectrum in real time based on multi-scale spectrum entropy analysis, and positioning the frequency band where the characteristic signal is located; and S3, converting the frequency spectrum of the frequency band where the characteristic signal is located into a time domain signal, and simultaneously displaying a spectrogram and a time domain waveform. Through spectrum segmentation, multi-scale spectrum entropy analysis, adaptive threshold judgment and frequency domain-time domain combined display, the problems of poor real-time performance, weak anti-noise capability and single dimension in the prior art are solved.

The invention relates to the technical field of lightning current measurement, in particular to a wireless measurement method for a high tower wave impedance real-model test. According to the technical scheme, the method comprises the steps that a three-dimensional model with the size proportion of 1: 1 to an actual tower is established in simulation software based on structural parameters of the actual tower, and the model is segmented; and applying a standard lightning current signal to the tower top of the three-dimensional model in simulation to obtain a simulation voltage value of each section of tower. A traditional potential line is replaced by the wireless measurement module, coupling interference is eliminated, and the wave impedance measurement precision is remarkably improved; the trigger voltage is pre-judged by adopting sectional type wireless networking and simulation, so that field wiring is simplified, and the test period is shortened; the system is suitable for high-rise towers of different heights and structures, stable data transmission in a complex environment is ensured in combination with a wireless transmission system deployed in a layered mode, meanwhile, the electrical characteristics of the towers under transient lightning current are accurately captured, and a reliable basis is provided for lightning protection design and electromagnetic compatibility optimization.

The invention provides a novel environment-friendly insulating gas surface flashover characteristic evaluation method based on surface charge on-line measurement, which comprises an electric field measurement system based on an electric field induced second harmonic effect (EFISH), a coupling high-voltage surface flashover experiment system, and an evolutionary process of an electric field in a process of applying high voltage to surface flashover, the evolutionary process of charge distribution is obtained based on the electrostatic field source relation, the starting moment of surface flashover is determined by measuring sound, light and electromagnetic signals in the surface flashover process, and the starting area of the surface flashover is observed through a high-speed camera; and associating the relationship between the charge and the surface flashover, and quantitatively explaining the induction effect of the charge on the flashover.

The invention relates to a Hall thruster discharge disturbance acquisition device and a Hall thruster discharge disturbance acquisition method, which are used for solving the technical problems of relatively low accuracy and reliability of an acquisition result of a Hall thruster discharge disturbance acquisition device in the prior art. According to the Hall thruster discharge disturbance acquisition device provided by the invention, the oscilloscope is used for measuring voltage and current changes of anode and cathode ignition, when the changes exceed a preset value, an acquisition triggering signal is sent to the high-speed camera while electric signal acquisition is automatically triggered, and the high-speed camera synchronously acquires an optical signal; and dual acquisition of photoelectric signals is realized.

The invention discloses a rectifier bridge arm fault identification method and system circuit based on multi-characteristic current waveform analysis, and relates to the technical field of rectifier bridge arm fault identification, and the method comprises the steps: collecting a current signal of an AC input side of a rectifier bridge through a current sensor, and obtaining an original current time domain waveform after filtering conditioning; performing period division on the original current time domain waveform based on a voltage synchronization signal, and outputting a positive half-cycle conduction interval and a negative half-cycle conduction interval in each power frequency period; in each power frequency period, performing square integral operation on the current waveforms of the positive half-cycle conduction interval and the negative half-cycle conduction interval to obtain a positive half-cycle energy value and a negative half-cycle energy value, and calculating an energy unbalance degree; and windowing fast Fourier transform is carried out on the original current time domain waveform, amplitudes and phases of third, fifth and seventh characteristic harmonics are extracted to form a harmonic characteristic vector, the vector is matched with a pre-stored bridge arm fault harmonic fingerprint template, and the matching degree of each fault type is obtained.

This invention relates to the field of data processing, and more particularly to an oscilloscope signal data processing method and system for bearing testing. The method involves acquiring bearing vibration data using an oscilloscope, extracting data from a first time moment for frequency domain analysis, obtaining its power spectrum, and dividing it into frequencies to obtain a first frequency sequence. Similarly, a second frequency sequence is obtained from the data at a second time moment. Aligning the two frequency sequences yields frequency matching pairs. Utilizing the frequency variations of neighboring frequencies within a single matching pair, the noise figure of each frequency in the matching pair is calculated, resulting in the noise figure for any frequency in the first frequency sequence. Based on these noise figures, a first mean sequence is constructed. The distribution consistency of each frequency point in the first mean sequence is obtained, and the segmentation effectiveness of each frequency point is calculated. Combined with a noise segmentation threshold, oscilloscope signal processing is completed. This invention denoises bearing vibration data acquired by an oscilloscope, improving the accuracy of the denoised oscilloscope signal data.

The present disclosure relates to a test and / or measurement system having a processing circuit configured to process a signal and to determine at least a first presentation based on a first parameter and a second presentation based on a second parameter when processing the signal, wherein the second parameter is different to the first parameter. The test and / or measurement system includes a display connected with the processing circuit, which is configured to display either the first presentation or the second presentation at the same time. The test and / or measurement system includes a storage medium configured to store first data associated with the first presentation and second data associated with the second presentation. Further, a computer-implemented method of gathering data of a signal as well as a computer program product are described.

The utility model provides a test system for a power device, and the system comprises power equipment which is used for applying high-voltage excitation between a source electrode and a drain electrode of the power device; the semiconductor parameter analyzer is used for applying bias voltage to the grid electrode of the power device; the oscilloscope is combined with the current probe to measure the drain current of the power device; and the upper computer is used for controlling the working time sequence of the power supply equipment and the semiconductor parameter analyzer so as to realize the scanning test of the device parameters. By combining the high-voltage power supply, the oscilloscope and the general semiconductor parameter analyzer, the performance of the power device under different voltage and current conditions can be comprehensively evaluated, the reliability and stability of the device in practical application are ensured, and the test cost is also considered.

The invention discloses a power frequency waveform classification method and device, a medium and equipment, and belongs to the field of waveform classification, and the method comprises the steps: obtaining preprocessed power frequency waveform data of a power transmission line, calculating various waveform features, and inputting the features into a preset cascade classifier model. The model is composed of a plurality of XGBoost binary classifiers which are cascaded in sequence, and each classifier is responsible for executing a specific binary classification task. The output result of the previous classifier is used for triggering the starting of the next classifier, or the final classification result is directly output. The cascade structure not only improves the accuracy and efficiency of classification, but also reduces the complexity of the model, and effectively solves the problem that the fault positioning power frequency of the power transmission line cannot be accurately and efficiently classified in the prior art.

The invention belongs to the field of box-type substation fault detection, relates to an information fusion technology, is used for solving the problem that the accuracy of a detection result cannot be guaranteed due to the fact that only a single fault diagnosis mode is adopted for fault detection in the prior art, and particularly relates to a box-type substation 5G intelligent information fusion system which comprises an information fusion platform. The information fusion platform is in communication connection with a box transformer fault detection module, a detection verification module and an instant decision module; the box-type substation fault detection module comprises an electrical detection unit and a waveform detection unit, the electrical detection unit is used for performing electrical fault detection on the box-type substation, and the waveform detection unit is used for performing current waveform detection on the box-type substation; the electrical state of the box-type substation is comprehensively monitored, the winding overheating hidden danger can be found in time through dynamic temperature rise calculation, and the problem of insulation degradation or sealing failure can be accurately recognized in combination with partial discharge and gas concentration detection.

Embodiments of the present application disclose a kind of to be displayed object color control method, device, display equipment and medium.The method includes: obtaining the to-be-displayed object information of to-be-displayed object, and corresponding to-be-displayed object interface is generated according to the to-be-displayed object information;The color information of the to-be-displayed object interface is configured based on the preset to-be-displayed object color mapping frame, and the to-be-displayed object color mapping frame is used to configure the mapping relationship of the to-be-displayed object information and the color information of the to-be-displayed object on the current display interface;According to the color information of configuration, the to-be-displayed object information of the to-be-displayed object interface is displayed.The technical scheme of the embodiment of the present application can freely select the color information displayed by to-be-displayed object, and the mapping relationship of the selected color information and to-be-displayed object is displayed in display interface in real time, facilitate user operation, improve the use experience of user.

A DC voltage test system for indicating a voltage, the DC voltage test system comprising a threshold switch, an oscillator connected thereto, and a liquid crystal display segment connected to the oscillator for indicating a state of the DC voltage, ie whether the DC voltage is above or below a threshold.

The invention provides a residual magnetism detection method and device of a power transformer, a medium and a product, and relates to the technical field of transformer residual magnetism detection. The method comprises the following steps: applying preset sinusoidal voltage excitation to an excitation winding of a to-be-detected power transformer; the excitation current waveform of the excitation winding is collected, and power transformer temperature data corresponding to the collection time is recorded; based on the temperature data of the power transformer, temperature compensation is carried out on the excitation current waveform; determining the peak difference of the exciting current in each alternating current period from the exciting current waveform subjected to temperature compensation; and determining the residual magnetism state of the power transformer based on the peak difference. According to the invention, the residual magnetism detection precision is improved.

The invention discloses a circuit board general online test method and system. The system comprises a master control system, a tool box, an online conveying device, an automatic docking device and a circuit board general test device. A general control system, an automatic docking device and a circuit board universal testing device are arranged on the side of the near end of the online conveying device, the automatic docking device is located on the other side, and the general control system is in communication connection with the online conveying device, the automatic docking device and the circuit board universal testing device; the tool box loaded with the circuit board to be tested is conveyed to the automatic butt joint device through the online conveying device, and the automatic butt joint device automatically achieves electrical butt joint between the tool box and the circuit board universal testing device. Test and data processing software is arranged in the circuit board general test device, and the test software is used for testing voltage, current, resistance, frequency and / or waveform of different circuit boards and carrying out data acquisition, statistical analysis, test report generation and the like. According to the invention, automatic on-line testing of different circuit boards is realized.

The invention relates to the technical field of electric appliance cabinet control, in particular to an intelligent electric appliance cabinet state evaluation method based on multi-dimensional time sequence data, and the method comprises the steps: collecting operation and environment data when an electric appliance cabinet acts; dynamically correcting the historical sample by using the temperature difference and the waveform change rate to generate a self-adaptive reference waveform; calculating a topology distortion index and an energy efficiency deviation index based on the current time sequence data and the adaptive reference waveform; and fusing the topological distortion index and the energy efficiency deviation index to calculate a mahalanobis distance to obtain a comprehensive abnormal score, and evaluating the state of the electric appliance cabinet according to the comprehensive abnormal score. By generating the environment adaptive reference waveform and fusing the multi-dimensional features, environment interference can be effectively stripped, macroscopic and microscopic fault features are captured, and the accuracy and robustness of fault diagnosis are improved.

The invention discloses a broadband oscilloscope input overvoltage protection circuit which is characterized in that an input signal V1 after voltage division attenuation is sent to a shift circuit, so that the input signal V1 is shifted to be within two comparison voltages, when the voltage of an input signal V2 is within the two comparison voltages VH and VL, a low level is output to a D trigger circuit, and when the voltage of the input signal V2 is outside the two comparison voltages VH and VL, a high level is output to the D trigger circuit. When input signal overvoltage occurs, the D flip-flop circuit outputs a high level to the enable end of the switch control circuit, so that output switch switching control signals of the switch control circuit are all low levels, and the switch circuit disconnects the input signal from a post-stage circuit. The shift circuit is adopted to shift the input signal V1 after voltage division attenuation, then comparison is carried out, and the input signal V1 exceeding the range of two comparison voltages VH and VL is overvoltage, so that waveform amplitude does not need to be converted into a waveform amplitude effective value signal, integral time delay does not exist, and the response speed is high; the problem that a single-pulse overvoltage signal cannot be detected due to the fact that a voltage measurement result is small is solved, and the problem that a broadband oscilloscope is prone to being damaged due to the fact that large voltage is input into a low-resistance channel is further solved.

A test and measurement system includes one or more remote probes, each of the one or more remote probes being configured to be coupled to a corresponding device under test (DUT) to receive an electrical test signal from the DUT, and each of the one or more remote probes including an electrical-to-optic interface (EOM) configured to convert the received electrical test signal into an optical test signal. The optical interconnect circuit receives the optical test signal from the EOM of the one or more remote probes and, in response to control signals, selects one of the optical test signals to be provided to a test and measurement system. The optical interconnect circuit converts the selected optical test signal into an electrical test signal that is provided to a test port of the test and measurement instrument. Methods are also described.

A method for synchronizing tasks in a test and measurement system, comprising: receiving a task input at a client in the system; receiving a call from the client at a job manager running on a first device processor in the system to create a job associated with the task; returning an action containing at least one job code block associated with the job to the client; receiving a call for the action; executing the at least one job code block by at least one processor in the system; determining that the job has completed; and completing the task. A device system comprises at least one test and measurement device and a device controller, the device controller having: at least one user input, a device controller processor configured to execute instructions, at least one memory storing data and storing instructions in the form of executable code, wherein the code causes the device controller processor to: receive input from a client, the input identifying a task; create a job associated with the task; return an action containing at least one job code block associated with the task to the client; receive a call for the action; determine that the job has completed; and notify the client that the job has completed.

This invention discloses a method for automatically calculating the two-channel switching time of a power supply panel. During the testing process, a control command is used to enable an oscilloscope to accurately sample data points. Based on the voltage amplitude and frequency of the preceding and following AC waveforms and the standard formula for a sine wave, the trend of the changing sine wave is predicted. The predicted trend waveform points are compared with the corresponding points sampled by the oscilloscope, and the moments of abrupt changes in the waveform are identified. The time difference between these two moments is the two-channel power supply switching time. This invention can reliably and quickly detect the two-channel switching of a power supply panel, reducing the risk of defective products entering the customer's possession.

The invention discloses a fertilizer production equipment predictive maintenance system and method based on machine learning. The system comprises a data acquisition module, a data preprocessing module, a data partitioning module, a health prediction and alarm module and a storage module. The data acquisition module is used for acquiring equipment vibration information, temperature field data, current waveform and historical equipment data in real time, the vibration information is spatially sampled by a vibration sensor unit, and the temperature field data is measured in a non-contact manner by an infrared thermal imager. When the scheme is implemented, the historical data of the equipment is acquired, and the current state of the equipment is judged on the basis of the historical data, so that the operation condition of the equipment can be judged more accurately, and the future operation state of the equipment can be predicted, so that a worker can eliminate potential safety hazards earlier, and the working efficiency is improved. The service life of the equipment is prolonged, and meanwhile safe and stable operation of the equipment is guaranteed.

The application discloses a flyback transformer winding loss evaluation method, device, equipment and storage medium, and the method comprises the following steps: acquiring electrical data in a preset switching period, and actual primary side current waveform and actual secondary side current waveform of a to-be-tested flyback transformer under the electrical data, and constructing a current calculation model to obtain a primary side current change function and a secondary side current change function; then, the primary side current change function and the secondary side current change function are subjected to Fourier decomposition to obtain a primary side DC component, a primary side harmonic component, a secondary side DC component and a secondary side harmonic component; then, selected primary side harmonic components, selected primary side harmonic frequencies, selected secondary side harmonic components and selected secondary side harmonic frequencies are determined; subsequently, the primary side AC resistance, the primary side DC resistance, the secondary side AC resistance and the secondary side DC resistance of the flyback transformer are acquired; finally, the winding loss value of the to-be-tested flyback transformer is calculated. Through implementation of the application, the winding loss of the flyback transformer can be quantitatively calculated.

The invention provides a simulation temperature rise test system for a magnetic device, and the system comprises an upper computer which is connected with a display and is used for setting test parameters. The control signal processor is used for receiving the test parameters of the upper computer and performing signal conversion to obtain a test pulse signal; the inductance on-line simulator is used for receiving the test pulse signal, at least two test ends are arranged in the inductance on-line simulator, the test ends are connected with a magnetic device to be tested, and the test ends are used for driving the magnetic device according to the test pulse signal; the oscilloscope is electrically connected with the output end of the inductance online simulator and is used for receiving temperature rise and loss data of the magnetic device driven by the test pulse signal, exporting the received temperature rise and loss data and displaying the received temperature rise and loss data on the display in a curve mode; the magnetic device simulation temperature rise test system provided by the invention is good in integration, and facilitates performance comparison between different magnetic devices.

The invention relates to a double-pulse test tool and method for a full-control device series valve, and the tool comprises an upper computer main control unit which is used for transmitting a control instruction, receiving waveform data, and carrying out the automatic parameter calculation; the control unit is connected with the upper computer main control unit, comprises a high-voltage power supply, a support capacitor and a bridge arm change-over switch, and is used for providing adjustable high voltage and realizing rapid reconstruction of a test loop; the test unit is electrically connected with the control unit and the to-be-tested device and comprises a busbar box and a load inductor, and the busbar box is used for interconnecting the supporting capacitor, the load inductor, the bridge arm change-over switch and the to-be-tested device to form an energy transmission main loop; and the acquisition unit is connected with the upper computer main control unit and the test unit, comprises an oscilloscope, a voltage probe and a current probe, and is used for capturing the electrical parameter waveform of the device to be tested in real time and uploading the electrical parameter waveform to the upper computer main control unit.

The invention relates to the technical field of waveform display, in particular to an eye pattern generation method and system based on a high-resolution oscilloscope, and the method comprises the following steps: analyzing a channel impact response, extracting effective delay, defining an operation kernel range, constructing sparse inverse filtering compensation distortion, judging an edge generation eye pattern track, and quantifying noise as a weight to carry out sub-pixel diffusion. According to the method, a delay set is established, a non-linear participation range is made to fit real channel behaviors, a high-order cross product is constructed in an original waveform, detail compensation of amplitude and time is enhanced in a sparse inverse filtering mode, and zero point and amplitude characteristics of a second derivative are combined, so that the error rate contour is deduced. A real edge interval is separated, continuous diffusion is formed in a histogram through a discrete probability weight constructed by quantizing noise, so that a statistical form of a low-probability region is completely reserved, and an error code related boundary presents a regular distribution structure in combination with a tail probability gradient.

According to an embodiment of the disclosure, a display device includes a display unit including a plurality of areas, a driver integrated circuit including a plurality of integrated circuits driving the display unit, and a storage medium configured to store temperature information of the display unit. Each of the temperature information includes data for temperature increment values for each area of the display unit when the driver integrated circuit is driven.

The utility model discloses a system for measuring the half-wave voltage of a phase modulator. The system comprises a laser generation module, an optical coupler, a first phase modulator, a second phase modulator, a first Faraday mirror, a second Faraday mirror, a signal generator, a photoelectric detector and an oscilloscope. The utility model discloses a system for measuring the half-wave voltage of a phase modulator, which is characterized in that a high-frequency periodic square wave electric signal is loaded to a second phase modulator through a signal generator, and the phase drift amount caused by unstable factors such as a light source, an optical device and an external environment can be regarded as perturbation in a small time period; the half-wave voltage of the second phase modulator is obtained by accurately calculating the variable quantity of the number of the peak (valley) values of the sine (cosine) waveform, so that the judgment on the light intensity extreme point of an interference pattern is avoided, the measurement precision is improved, and the key core application in the fields of quantum communication and quantum calculation is realized.

The invention discloses a delay value determination method and system, a compensation method and system, an oscilloscope and a storage medium. The method comprises the steps that a control module obtains a first delay value corresponding to each to-be-calibrated channel; the control module obtains a second delay value between analog signals input by each analog channel at different gears to be calibrated and analog signals input relative to the analog channel at the reference gear; the control module determines a third delay value corresponding to each analog channel at each to-be-calibrated gear according to the second delay value and the first delay value; the control module obtains a corresponding fourth delay value of the reference channel at each to-be-calibrated gear; and the control module determines a fifth delay value corresponding to the reference channel at different gears to be calibrated according to the fourth delay value and the fifth delay value. According to the technical scheme, manual calculation and determination are not needed, the delay value determination precision is improved, the consumed time is shortened, and the labor cost is reduced.

The invention relates to a piezoelectric measuring device (100) comprising a sensor element (10) which generates a measurement signal (M) for a pressure to be measured, a conductor element (13) for deriving the measurement signal (M) to a data acquisition device (12), which data acquisition device (12) is configured to acquire and evaluate the derived measurement signal (M), wherein the sensor element (10) comprises an operational amplifier (20) which has an inverting input and an output, a feedback capacitor (22) which is arranged in parallel to the inverting input and output of the operational amplifier (20), and a reset switching element (27) arranged in parallel to the inverting input and output of the operational amplifier (20), wherein the data acquisition device (12) is further configured toto provide an electrical supply voltage (U) for the sensor element (10), wherein the data acquisition device (12) has a measurement cycle circuit (35) configured to switch on the electrical supply voltage (U) for the sensor element (10) before the start of a measurement cycle and to switch it off after completion of the measurement cycle; and that the sensor element (10) has a power-on reset logic (25, 26) configured to detect the presence of the electrical supply voltage (U) and, if the electrical supply voltage (U) is present before the start of a measurement cycle, closes and reopens the reset switching element (27).

The application discloses an optical multiplier system for processing high-speed data flow and a method thereof, and belongs to the technical field of semiconductors, comprising a stibonium quantum well laser, an intensity modulator, a phase modulator, a balanced homodyne detector and an oscilloscope; the stibonium quantum well laser is used as a light source, light signals output by the stibonium quantum well laser are evenly divided into two light beams by a Y-type beam splitter, and the two light beams are defined as x-vector light beams and y-vector light beams respectively; the two light beams sequentially pass through the intensity modulator and the phase modulator to complete real number and complex number coding; after the two light beams are coupled by a beam splitter / coupler, the two light beams are input to the balanced homodyne detector for detection, and the photocurrent output by the balanced homodyne detector is calculated to obtain a differential current, the differential current is collected and displayed in real time by the oscilloscope, and the differential current is the vector point multiplication operation result corresponding to the two vector light beams. The application has the characteristics of low cost, low energy consumption, high speed, expandability and the like.