441results 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 discloses a DC bus interference anomaly detection method based on a dynamic local outlier factor algorithm. The DC bus interference anomaly detection method is especially suitable for real-time operation state monitoring of a complex power system. Aiming at the limitation that a traditional anomaly detection method is high in calculation complexity and limited in detection precision in high-dimensional time series data processing, optimization is carried out on the basis of an outlier detection theory, a dynamic mode updating algorithm is provided, the algorithm evaluates outlier characteristics of time series data through local density, and the detection precision of the time series data is improved. The global calculation overhead is obviously reduced, and the real-time performance and the detection efficiency of the system are improved. Compared with a traditional method, the method consumes manual intervention, is high in detection precision and strong in early warning, can be widely applied to the field of health assessment and intelligent operation maintenance of power equipment, and shows a good engineering application prospect.

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 relates to the technical field of power system monitoring, and discloses a power circuit breaker state monitoring and recording system and method based on a signal processing algorithm, and the system comprises a data collection module which is used for collecting the real-time operation data of a power circuit breaker, and storing the real-time operation data as a monitoring record; the signal preprocessing module is used for preprocessing the real-time operation data by using a filtering and denoising algorithm before the state of the power circuit breaker is analyzed; the state analysis module is used for performing state analysis on the preprocessed data based on PLC program optimization and a signal processing algorithm so as to judge the working state of the power circuit breaker; and the recording module is used for recording and storing the analyzed state of the power circuit breaker for subsequent query and analysis. The working state of the circuit breaker can be accurately judged, and potential faults can be found in time, so that electric power accidents are effectively prevented, and the stability and the safety of an electric power system are improved.

The invention discloses a lightning current waveform determination method, apparatus and device, a medium and a product. The lightning current waveform determination method comprises the steps of obtaining historical lightning stroke positioning data of a waveform position to be determined and actually measured recording data of a detection point; according to the historical lightning stroke positioning data, establishing an electromagnetic transient simulation model of the multi-base tower at the waveform position to be determined; and according to the electromagnetic transient simulation model and the actually measured recording data, carrying out inversion on the lightning current waveform to obtain the lightning current waveform of the waveform position to be determined. An electromagnetic transient simulation model is established through actual historical lightning stroke positioning data, a real line condition is simulated, and inversion is performed on a lightning current waveform through actually measured recording data to obtain the lightning current waveform. The lightning current waveform is determined, and the accuracy of the lightning current waveform is improved.

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.

The invention relates to the technical field of electromagnetic radiation measurement, and discloses a near-field scanning system and a rapid scanning method for electromagnetic radiation measurement. The near-field scanning system comprises a data acquisition unit, a probe control moving unit and a control unit; the data acquisition unit comprises a vector network analyzer and a spectrum analyzer which are used for frequency domain measurement, an oscilloscope and a radio frequency signal source which are used for time domain measurement, and a near-field electromagnetic probe; the probe control moving unit is used for controlling the near-field electromagnetic probe to move along a set route in the X direction, the Y direction and the Z direction; the control unit is used for synchronously controlling the data acquisition unit and the probe control moving unit; according to the rapid scanning method, by judging the gradient amplitude and the local self-adaptive threshold value of each scanning point, the scanning points are encrypted at the place where the electromagnetic field changes rapidly, rough scanning is carried out at the place where the electromagnetic field changes slowly, and compared with equal-interval uniform sampling, the number of the scanning points can be reduced, and the efficiency of a near-field scanning system can be improved.

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.

A power system may receive power signals for one or more monitored devices, where a respective power signal includes at least one of a current or a voltage; perform discrete wavelet transforms (DWTs) of the power signals to generate DWT coefficients associated with the power signals; classify the power signals within two or more classes based on the DWT coefficients, where the two or more classes include one or more normal classes associated with one or more acceptable operational conditions and one or more atypical classes associated with one or more atypical operational conditions; and generate one or more alert signals based on the classified power signals when one or more alert conditions are met.

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.

The invention discloses an oscilloscope based on a long afterglow luminescent material. The oscilloscope comprises a first laser, a light beam horizontal deflector, a light beam vertical deflector and a long afterglow screen, the first laser is used for emitting a light beam, the light beam sequentially enters the light beam horizontal deflector and the light beam vertical deflector and then reaches the long afterglow screen, and light spots are formed on the long afterglow screen; the light beam horizontal deflector is used for enabling the light spots to circularly move from one side of the long afterglow screen to the other opposite side in the horizontal direction at a preset speed; the light beam vertical deflector is used for enabling a light spot to move up and down in the long afterglow screen in the vertical direction under the action of an input electric signal, the amplitude of the up-down movement is in positive correlation with the intensity of the input electric signal, and the frequency of the up-down movement is consistent with the frequency of the input electric signal; and the long afterglow screen is used for displaying the waveform of the input electric signal. According to the oscilloscope, the size, energy consumption, complexity and cost of equipment can be effectively reduced, and batch production, popularization and application are facilitated.

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 provides a device for testing the shaft voltage in bearing electrocorrosion, which comprises a rotating shaft, a pair of bearings is mounted on the rotating shaft, one end of the rotating shaft is connected with a servo motor through a magnetic coupling, the servo motor is connected with a frequency converter, the rotating shaft is connected with a function signal generator, and the function signal generator is connected with a signal generator. The voltage measuring point of the bearing is connected with an oscilloscope, an adjustable resistor is connected in series between the voltage measuring point of the outer diameter of the bearing and the oscilloscope, and the oscilloscope is in communication connection with an upper computer through a data switch; based on the device, on the second aspect, the invention provides a method for testing and analyzing the shaft voltage in bearing electro-corrosion, a corresponding recognition algorithm is designed according to the data collected by the oscilloscope and a bearing capacitor discharge event, and then the bearing electro-corrosion is identified through the applied common-mode voltage and the measured shaft voltage. And bearing capacitance, breakdown voltage, discharge energy and discharge times are calculated, so that data support is provided for subsequent motor bearing fault prediction and life evaluation.

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 bicycle detection, and particularly discloses an electric power-assisted bicycle pedal force detection method and system based on wave crest positioning, and the method comprises the steps: monitoring the working process of an electric power-assisted bicycle, and collecting pedal force sensing signal data; performing wave crest positioning on the voltage waveform of the torque sensor, collecting periodic data between an inner sleeve and an outer sleeve in the torque sensor, performing phase comparison on the periodic data of the inner sleeve and the outer sleeve to obtain a phase difference between the inner sleeve and the outer sleeve, and processing to obtain real-time pedal force data; and whether feedback adjustment is performed on the electric power is judged according to the real-time data of the pedal force. According to the electric power-assisted bicycle pedal force detection method and system based on wave crest positioning, it can be ensured that assistance provided by an electric power-assisted bicycle is matched with the actual demand of a rider, the optimal assistance level of the electric power-assisted bicycle under different road conditions and riding speeds is further determined, and the energy utilization efficiency is improved.

The present disclosure provides a measurement application device comprising a signal processing module configured to at least one of generate measurement signals, and acquire measurement signals, a user interface configured to acquire gesture-based user input, and a processor coupled to the user interface, and executing a machine learning algorithm, wherein the machine learning algorithm is configured to analyze received gesture-based user input, and to output respective control information for controlling the signal processing module or configuration information for configuration of the signal processing module. Further, a respective computer implemented method is provided.

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 relates to the technical field of multi-channel synchronous test wave recorders, in particular to a multi-channel synchronous test wave recorder which comprises an outer box, a multi-channel synchronous test wave recording device and multiple groups of plug-in assemblies, a flow guide plate is fixedly mounted on the inner wall of the outer box, a heat dissipation mechanism is arranged in the outer box, a mounting pipe is arranged at the bottom of the flow guide plate, and the plug-in assemblies are arranged in the mounting pipe. A fan is fixedly mounted in the mounting pipe, a first dust removal net is slidably connected to the inner wall of the mounting pipe, a vibrating mechanism is arranged below the first dust removal net, and the mounting pipe is connected with a collecting mechanism. The dust removal device has the advantages that the fan reversely runs to blow air downwards, so that air circulates, dust can be quickly taken away by airflow after falling from the first dust removal net and enters the collection mechanism, the falling dust is effectively captured and stored, dust leakage is avoided, the situation that the cleaned dust is sucked again after the fan is restarted is avoided, and the service life of the dust removal device is prolonged. Dust is effectively prevented from entering the system for the second time, and long-term stable operation of equipment is ensured.

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.