1422 results about "Oscilloscope" patented technology

The invention discloses a response time conduction type testing device and method for a radio frequency channel protection device. The response time conduction type testing device comprises a transient field intensity generating device, an isolator, a directional coupler, a first attenuator, a second attenuator, a third attenuator, a first power meter, a second power meter, a high-speed oscilloscope, a vector network analyzer and a radio frequency channel protection device to be tested. According to the method, the response performance of the protection device under the influence of the transient strong field can be comprehensively, safely and accurately evaluated, the amplitude limiting function of the protection device can still be effectively exerted under the action of the transient strong field with an extremely narrow rising edge, and then subsequent devices, circuits and equipment are prevented from being damaged.

The invention relates to an optical acoustic sensor, in particular to a high-sensitivity acoustic sensor based on Fano resonance and a measuring method. The problem that an existing optical acoustic sensor is low in sensitivity is solved. A high-sensitivity acoustic sensor based on Fano resonance comprises a 1550nm laser, a phase modulator, a first polarization controller, a conical optical fiber, a CaF2 crystal resonant cavity, a second polarization controller, a photoelectric detector, an oscilloscope and a computer. The emergent end of the 1550nm laser is connected with the head end of the conical optical fiber through the phase modulator and the first polarization controller in sequence; the conical optical fiber is coupled with the CaF2 crystal resonant cavity; the tail end of the conical optical fiber is connected with the incident end of the photoelectric detector through the second polarization controller; the signal output end of the photoelectric detector is connected with the signal input end of the oscilloscope; the signal output end of the oscilloscope is connected with the signal input end of the computer. The method is suitable for acoustic signal measurement in the fields of industry, traffic, environmental protection, medical treatment and the like.

The invention discloses a window-based decoupling short-time fractional Fourier transform time-frequency analysis method. The method comprises the following steps: S1, acquiring non-stationary signal data generated under power quality disturbance in a power grid; s2, segmenting the non-stationary signal into a plurality of parts based on signal waveform characteristics, and setting an initialized virtual window function for discrete short-time fractional Fourier transform, wherein the window function only provides an interface for calling of a specific window function; s3, calling different window functions for each segmented sub-segment signal to obtain windowed sub-segment signals under a specific window function; and S4, discrete fractional Fourier transform is applied to the sub-segment signals obtained in the step S3 to obtain time-frequency results of the sub-segment signals under different windows, and finally, frequency spectrums of the sub-segment signals are spliced according to a time sequence and output by an oscilloscope. Based on the characteristics of non-stationary signals generated under power quality disturbance in a power grid, different window function analysis signals can be called in one task by setting a virtual window function interface, and the window-based decoupling short-time fractional order Fourier transform time-frequency analysis method is formed. According to the method, the coupling between fractional Fourier transform and a specific window is reduced, the expandability of a program is improved, and more accurate signal local spectrum features can be obtained.

The invention discloses a POL power supply automatic test method based on modular design, and belongs to the technical field of power supply test. The method comprises the following steps: firstly, under the control of an upper computer, automatically reading POL power supply basic parameters including key characteristic parameters such as input / output voltage, rated current and frequency from a preset Excel table, and establishing a judgment reference for testing; then, instrument initialization is completed, communication connection with test equipment such as an oscilloscope, an electronic load and a direct-current power supply is established, and configuration of initialization function parameters is completed; then, executing a measurement task of each core parameter of the POL power supply to be tested, and in the test process, executing a parallel measurement management mechanism, namely configuring each instrument parameter and channel state in real time according to a specific test item, and triggering a retry or interrupt logic under the conditions of communication abnormality, data timeout and the like until the test recovers a running state; and finally, after the test is completed, performing Excel storage and interaction on the standardized test data and the waveform screenshot, and finally safely exiting. According to the POL power supply automatic test method based on the modular design, the whole test process is divided into a plurality of serial or parallel function processing units such as parameter reading, instrument initialization, test execution and test management, data storage and interaction and the like, and high efficiency and usability of a test system are achieved.

An oscilloscope having a Nyquist frequency lower than an analog bandwidth includes an input configured to receive a signal under test; an analog-to-digital converter (ADC) to receive the signal under test, sample the signal under test at a sample rate, and produce digital samples of the signal under test; one or more processors configured to execute code that causes the one or more processors to: determine a set of candidate unit intervals by generating corresponding candidate histograms using the candidate unit intervals; determine a best unit interval from the candidate unit intervals based upon entropy measures of each candidate histogram; and reconstruct a representation of the signal under test using the digital samples and the best unit interval.

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 signal measurement method of an oscilloscope, the oscilloscope and a storage medium, and belongs to the technical field of oscilloscopes. The method comprises the following steps: controlling to display a measurement group interface, wherein the measurement group interface comprises a target measurement group; in response to a first operation on the target measurement group, controlling to display a measurement type interface, and determining at least two target measurement types based on the measurement type interface so as to update the measurement types in the target measurement group into the at least two target measurement types; and / or, in response to a second operation on the target measurement group, controlling to display the information source interface, determining at least one target information source based on the information source interface, and updating the information source in the target measurement group to the at least one target information source; and updating and applying the current measurement type in the target measurement group to the current information source in the target measurement group to obtain an updated target measurement group, and measuring the signal according to the updated target measurement group. Through the measurement group mode, the operation process can be reduced, and the measurement efficiency can be improved.

The invention relates to the related technical field of performance testing, in particular to a performance testing method and system based on an ultrathin touch switch color film.The method comprises the steps that electrical performance testing parameters are configured to be connected with a signal generator and an oscilloscope, touch and force data are introduced, correlation between stray capacitance disturbance signals and time frequency is analyzed, and interference intensity and time delay are determined; and associating the physical defect type mapping failure path to generate a reminding signal. The technical problems that a single-point testing means is limited in analysis capacity for stray capacitance disturbance signals and cannot accurately grasp signal interference characteristics are solved, self-adaptive configuration of electrical performance testing parameters driven by building material parameters is achieved, the testing parameters can be automatically adjusted according to different color film material characteristics, the testing accuracy and effectiveness are improved, and the testing efficiency is improved. And meanwhile, the limitation of the traditional single-point test is broken through, the signal interference characteristics are accurately quantified, the signal interference condition is deeply known, the failure mechanism analysis is combined, the fault source is quickly positioned, and the fault occurrence probability is reduced.

The invention relates to a long-gap discharge leader development speed measurement method based on radiated electromagnetic wave detection. The method comprises a set of high-frequency antennas and a high-speed oscilloscope and a long-gap discharge leader development speed calculating method. The method adopts a certain antenna arrangement form; long-gap discharge radiated electromagnetic wave pulse time is detected simultaneously through the plurality of antennas; leader head position is positioned according to time difference of a signal arriving at different antennas; and furthermore, the long-gap discharge leader development speed can be calculated. The method can effectively improve the measurement precision of the discharge leader development speed, and resolution reaches the level of 0.1 ns.

The invention relates to the technical field of data analysis, and provides a CAN bus waveform message analysis method, device and equipment and a medium, and the method comprises the steps: issuing an operation instruction carrying a preset operation parameter to an oscilloscope; in response to waveform data fed back by the oscilloscope, storing the waveform data as a message file in a preset format; analyzing and converting the message file according to the data head structural body identified by the oscilloscope to obtain a message array; performing time domain segmentation, normalization processing and de-noising processing on the data in the message array by using a Numpy library to obtain a message signal; and performing error frame screening on the message signal by adopting a strategy of supplementing one after five, and performing layer-by-layer analysis on the screened message signal based on a CAN protocol structure to obtain message analysis content. According to the invention, through the software design of the whole process, a universal scheme is adopted from data acquisition, storage and analysis to signal processing and message generation, so that the analysis universality of the CAN bus waveform message is effectively improved.

A test and measurement device has an input port to receive a signal from a device under test (DUT), the signal having a symbol rate, one or more analog-to-digital converters (ADC) to convert the signal to waveform samples at a sampling rate, and one or more processors, when aliasing is present: up-sample a portion of the signal having aliased samples to produce up-sampled samples; use the up-sampled samples to produce a real-time waveform; perform clock recovery on the real-time waveform to produce a recovered clock; and resample the aliased samples to produce a non-aliased waveform.

The invention provides an electromagnetic compatibility test system for an integrated circuit, a part or a whole vehicle. The system comprises an interference signal injection or receiving device, a test board, an oscilloscope, an upper computer, a power supply and an isolation communication device, the interference signal injection or receiving device is used for sending a quantitative interference signal to the test board or receiving and measuring the size of the interference signal of the test board; the test board is used for bearing a tested integrated circuit and carrying out an electromagnetic compatibility test according to a working state specified by the upper computer; the isolation communication device is used for performing photoelectric conversion on a control signal and a monitoring signal corresponding to the electromagnetic compatibility test to form photoelectric isolation; the oscilloscope is used for measuring the waveform of the monitoring signal; and the upper computer is used for controlling the test process and analyzing the monitoring signal to judge the test result. The isolation communication device is used for cutting off electrical connection between the test board and the upper computer and the oscilloscope, it is ensured that the test board is not affected by the outside in the electromagnetic compatibility test process, and the accuracy of the electromagnetic compatibility test is improved.

The invention provides an energy storage simulation system and an analysis method based on a simulation model, and the system comprises a simulation module which builds a simulation model comprising a photovoltaic system and an energy storage device, simulates a power grid adjustment strategy through the simulation model, and outputs a simulation report; the PI D controller is used for controlling the output power of the energy storage device and maintaining the power of the grid-connected point within a set range by compensating a power curve of the photovoltaic system; the oscilloscope is used for collecting voltage, current and power data at the two ends of the photovoltaic system, the energy storage device and the grid-connected point, after the simulation command is executed, a simulation waveform is displayed on an interface of the oscilloscope, the simulation waveform is analyzed, the reliability of the energy storage simulation system in different operation states is evaluated, and a system reliability report is generated; the direct current side protection circuit is used for protecting direct current components of the photovoltaic system and the energy storage device; and the alternating current side protection circuit is used for protecting the alternating current sides of the photovoltaic system and the energy storage device.

The utility model relates to the technical field of automobile testing, in particular to a double-pulse automatic testing device which comprises a shell provided with a containing cavity, an opening is formed in the shell, and a cover plate capable of being opened and closed is arranged at the opening; a signal generator, a tested device and an oscilloscope which are electrically connected in sequence are arranged in the accommodating chamber; the door lock module is used for locking the cover plate when the cover plate is closed; the high-voltage control module is electrically connected with the high-voltage power supply, the high-voltage power supply end of the tested device, the door lock module and the output end of the signal generator, and is used for connecting the high-voltage power supply and the tested device when the door lock module is locked and disconnecting the high-voltage power supply and the tested device after a double-pulse signal is output; the discharging module is electrically connected with the high-voltage control module and the high-voltage power supply end of the tested device and is used for releasing the high-voltage power supply after the high-voltage power supply is disconnected; and the door lock module is electrically connected with the high-voltage power supply end of the tested device and is used for unlocking the cover plate after the high-voltage power supply is released. By adopting the device, the test safety can be improved.

The invention relates to the technical field of photoelectronics, and discloses a chirp parameter measuring device and method based on a directly modulated laser optical module, and the device comprises an arbitrary waveform generator, an optical module, a tunable dispersion compensation module, and an oscilloscope. The optical module comprises a directly modulated laser; the output of the arbitrary waveform generator is electrically connected with the radio frequency input port of the directly modulated laser; the output optical signal end of the directly modulated laser is connected with the input optical end of the adjustable dispersion compensation module; the adjustable dispersion compensation module is used for controlling dynamic switching between a zero dispersion state and a preset non-zero dispersion state by introducing dispersion into a link, and an output optical signal port of the adjustable dispersion compensation module is optically connected with a receiving port of the optical module; and the radio frequency output end of the optical module is electrically connected with the oscilloscope. According to the invention, the problems of long chirp parameter test time and high measurement cost in the prior art are solved, and the chirp parameter measurement method has the characteristic of being capable of realizing rapid and accurate chirp parameter measurement.

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 invention belongs to the technical field of microwave photon links, and particularly relates to a high-resolution microwave photon frequency measurement system based on real-time Fourier transform. The link comprises a mode-locked laser, a first dispersion compensation module, a second dispersion compensation module, a dual-drive Mach-Zehnder modulator, a Mach-Zehnder modulator, a dispersion optical fiber, a time lens, an erbium-doped optical fiber amplifier, a photoelectric detector and an oscilloscope; the mode-locked laser outputs femtosecond Gaussian light pulses, and the femtosecond Gaussian light pulses are injected into the first dispersion compensation module and then stretched into chirp light pulses; modulating the chirp light pulse through electro-optical modulators which are connected in parallel; the modulated optical signal is subjected to time amplification processing through a dispersion optical fiber, a time lens, a second dispersion compensation module and an erbium-doped optical fiber amplifier in sequence; and the optical signal after time amplification processing is converted into a microwave pulse carrying frequency information of the signal to be detected by a photoelectric detector, and the microwave pulse is observed by an oscilloscope.

The invention relates to the technical field of electronic circuits, in particular to a field effect transistor dynamic threshold voltage measuring method and system. The method comprises the following steps: generating a high-speed pulse signal with preset rise time through a pulse signal generator; applying the high-speed pulse signal to the grid electrode of the field-effect tube to be tested, and collecting the voltage waveform of the grid electrode of the field-effect tube through an oscilloscope, and recording the voltage waveform as a grid electrode voltage waveform; the current probe monitors the current response of the drain electrode of the field effect transistor in real time, the current response is recorded as drain electrode current response, and the sampling rate of the drain electrode current response is synchronous with the sampling rate of the grid voltage waveform. According to the invention, the channel establishment delay is quantified in situ on the electrical characteristic, so that the threshold voltage is redefined by the potential at the completion moment of the channel formation, and the concealment of the transient characteristic caused by direct current slow scanning is eliminated.

The invention provides a probe frequency response calibration parameter determining method, a probe frequency response calibration parameter measuring system and a storage medium, and the probe frequency response calibration parameter determining method introduces a composite test signal including a steady-state frequency sweep signal and a transient pulse signal. De-embedding calculation is carried out on a data set which is obtained under the two conditions that a probe is not connected to a calibration system and the probe is connected to the calibration system and responds to the same test signal, namely amplitude division is carried out to eliminate link gain deviation, phase subtraction is carried out to strip channel phase deviation, accurate extraction of the independent frequency response characteristic of the probe is achieved, and the accuracy of the independent frequency response characteristic of the probe is improved. Therefore, the frequency response calibration parameter of the probe is determined. According to the invention, system errors introduced by a test environment and a rear-end measurement link are eliminated, the calibration precision of the amplitude-frequency characteristic and the phase-frequency characteristic of the probe in a full working frequency band is improved, and a reliable basis is provided for implementation of accurate real-time anti-distortion compensation in actual signal acquisition of measurement equipment such as an oscilloscope and the like; and the reduction authenticity of the whole measurement system in the high-frequency and broadband signal test is ensured.

An integrated photonics millimeter wave (MMW) radar communication system based on analog phase modulation scheme includes an integrated photonics MMW radar communication signal transmitter, a radar receiver, and a communication receiver. The transmitter includes a radar communication signal analog phase modulation module, an optical frequency comb (OFC) module, an electro-optic modulator (EOM), an optical shaping filter, an optical power divider, a photoelectric detector, an electric power amplifier, and a transmitting antenna that are cascaded sequentially. The radar receiver includes a radar receiving antenna, an electric low-noise amplifier (LNA), an optical phase modulator, an optical bandpass filter (BPF), a low-speed photoelectric detector, an electric low-pass filter, and a low-speed oscilloscope that are cascaded sequentially. In the communication receiver, a communication receiving antenna is sequentially cascaded with an electric LNA, a frequency mixer, and an oscilloscope, and a voltage-controlled oscillator is cascaded with a frequency multiplier and then connected to the frequency mixer.

The invention provides a device and method for manipulating and regulating the bandwidth of a quantum compression state light field, and belongs to the technical field of optics. The problems that an experiment system is complex and high in cost due to the fact that existing bandwidth compression manipulation experiments depend on additional optical devices are solved. The device comprises an optical module, a data acquisition module and a data processing module, two BHDs are used for detecting noise variances of an upper sideband mode and a lower sideband mode based on compression carrier symmetry respectively, then an oscilloscope and a spectrum analyzer are used for detecting time domain signals and frequency domain signals of the BHDs respectively, and broadband compression state light field noise distribution is obtained. A collected time domain signal is post-processed by using an LPSD algorithm, and frequency-dependent differential phase shift is introduced into an upper sideband mode, so that bandwidth compression control of low-pass filtering, high-pass filtering and band-pass filtering effects can be realized.

The invention discloses a laser radar echo signal simulator performance parameter testing method and device, and belongs to the field of photoelectric information. The system comprises a simulation distance related parameter measuring device, a working wavelength measuring device, a view field and distortion measuring device, an output power related parameter measuring device, a scanning speed and frame frequency and waveform similarity measuring device, an angular resolution measuring device and a simulator position adjusting device. The view field and distortion testing device is composed of a camera, an adjusting frame and a hemispherical guide rail. The scanning speed and frame frequency measuring device is composed of a focusing lens, two photoelectric detectors and an oscilloscope. The output power related parameter measuring device is composed of a focusing lens and a power meter. The working wavelength measuring device is composed of a focusing lens, an optical attenuator and a wavemeter. The placing position of the simulator on the platform is preset in advance through the simulator position adjusting device, and the simulator is sent to a specified testing position by driving the adjusting frame and the simulator to slide on the guide rail.

The invention relates to the technical field of high-voltage insulation prediction, in particular to a pilot channel electron density diagnosis system and method based on a slit spectrum, and the system comprises an impulse voltage generator, a high-voltage electrode, a condensing lens, a slit, a first collimating lens, a second collimating lens, a VPHG, a high-speed camera, an electro-optical converter, a photoelectric converter, an oscilloscope, and a computer. According to the invention, the electron density in the pilot channel is accurately obtained, the evolution characteristics of physical characteristic parameters in the pilot channel in the long-gap discharge process can be effectively described, and high-precision calculation of the electron density can be realized without measuring the temperature; compared with the prior art, the method has the advantages that the time resolution and the space resolution are improved, the high diagnosis precision is ensured, the monitoring capability of the electron density change in the pilot discharge channel is enhanced, the change of the electron density can be effectively monitored in time and space, and the physical mechanism and characteristics in the pilot discharge process can be deeply understood.

The invention provides an automatic waveform identification method for an intelligent oscilloscope, and relates to the technical field of signal processing, and the method comprises the steps: carrying out the time sequence compression processing and cross-scale frequency band aggregation operation of a waveform signal of the intelligent oscilloscope, and obtaining a time sequence compression sequence and multi-resolution frequency spectrum information of the waveform signal; time sequence energy characteristics and complex domain characteristics are determined through the time sequence compression sequence and the multi-resolution frequency spectrum information, spatial-temporal characteristic interaction is carried out on the time sequence energy characteristics and the complex domain characteristics based on a multi-head self-attention mechanism and a bidirectional long-short-term memory network, and a spatial-temporal characteristic weight matrix is obtained; constructing a teacher network and a student network according to the waveform signals, and determining waveform alignment features through the spatial-temporal feature weight matrix, the teacher network and the student network; and finally, the intelligent oscilloscope outputs a waveform recognition result based on the waveform alignment feature, and multi-scale waveform feature extraction and attention enhancement recognition of the waveform signal can be realized, so that the recognition accuracy of the intelligent oscilloscope is improved.

The invention relates to the technical field of ultrasonic detection, in particular to a glue pouring bubble detection device and method for a water immersion ultrasonic transducer, and the device comprises a signal generator, a power amplifier, an oscilloscope, a to-be-detected ultrasonic transducer, a clamp, a fixing device, an infrared camera and a computer. In order to solve the problems that a traditional infrared thermal imaging technology is sensitive to material characteristics, high in excitation condition requirement and difficult to achieve defect quantitative analysis, an excitation electric signal drives an ultrasonic transducer to work to generate heat after power amplification, an infrared camera is adopted to capture a surface temperature distribution image of the ultrasonic transducer, and a convolutional neural network model is constructed; the volume fractions of the bubble defects of the glue pouring layer of the ultrasonic transducer in the infrared image are subjected to hierarchical identification (including four hierarchical intervals of less than 10%, 10%-30%, 30%-60% and more than 60%). The method solves the limitation of defect qualitative analysis of a traditional method, realizes quantitative evaluation of the bubble content of the glue pouring layer, and provides data support for quality detection of the ultrasonic transducer.

The invention discloses an oscilloscope sampling waveform data processing method based on reinforcement learning, and relates to the technical field of waveform signal processing, and the method comprises the steps: obtaining a plurality of groups of original waveform signals, including a first waveform signal and a second waveform signal, collected by an oscilloscope based on a pre-configured data collection strategy, extracting waveform features and constructing a multi-dimensional vector matrix; introducing reinforcement learning into the multi-dimensional vector matrix to analyze phase deviation caused by hardware energy consumption, determining an influence weight of the phase deviation on waveform quality, and feeding back and adjusting a data acquisition strategy; based on the adjusted data acquisition strategy, a third waveform signal is obtained, comprehensive characteristic deviation is obtained through Hilbert transform, the comprehensive characteristic deviation is compared with a preset deviation threshold value, and if the comprehensive characteristic deviation exceeds the preset deviation threshold value, a scale disturbance mechanism is introduced, secondary time processing is executed, and the third waveform signal is corrected; according to the invention, the sampling precision is improved.

The utility model belongs to the technical field of aeronautical manufacturing, and relates to an electrical performance test device, an airborne disc box piece comprises a plurality of relays and freewheeling diodes CR, the freewheeling diodes CR are connected in parallel at two ends of a relay coil RL, the test device comprises a plurality of test units connected in parallel, the number of the test units is the same as that of the relays of the airborne disc box piece, and the relays are connected in parallel. According to the utility model, the oscilloscope is adopted to check the performance of the fly-wheel diode in which the relay coil is connected in parallel, so that the open-circuit characteristic of the fly-wheel diode caused by manufacturing processes such as welding overheating and the like can be quickly diagnosed; a relay contact on-off inspection mode is innovated, a three-purpose meter resistance gear conduction method is replaced by lightening of light-emitting diodes with different colors, the on-off state of the relay contact is judged visually, and the test efficiency and safety are improved.

The invention discloses a power semiconductor board-level test system and method, and belongs to the technical field of power semiconductor device test. According to the system, a reactive aging test and a dynamic characteristic test are creatively integrated on a single test platform, and the problems of low efficiency and high cost of a traditional substation test are solved through modular design. The system comprises a multifunctional test head arranged at a test station and capable of being connected with a power terminal and a signal terminal of a power module at the same time; the reactive load loop is formed by a three-phase adjustable reactor; the high-precision signal acquisition module comprises a flexible current probe and a differential voltage probe; the oscilloscope realizes multi-channel synchronous acquisition; and accurate control is realized based on the main control board card of the FPGA. According to the testing method, Vge, Vce, Ic and other parameters are collected in real time in the reactive aging process, online monitoring of dynamic characteristics is achieved through a current triggering mechanism, and a fault recording function is achieved.

The invention discloses a high-voltage electric pulse cracking coal rock stress shock wave monitoring device which comprises a high-voltage pulse capacitor, a voltage divider, a high-voltage pulse switch, a high-voltage pulse cracking generation chamber, a high-voltage probe, a Rogowski coil and an oscilloscope. A test piece is fixed in the high-pressure pulse cracking generation chamber, a circle of test piece clamping assembly corresponding to the test piece is arranged in the high-pressure pulse cracking generation chamber, needle-shaped electrodes are arranged on the two sides, not provided with the test piece clamping assembly, of the test piece, and a piezoelectric pressure sensor is arranged on the high-pressure pulse cracking generation chamber. The detection signal output ends of all the piezoelectric pressure sensors are connected with the pressure detection signal input end of the stress wave signal collector, and a Faraday cage used for covering the piezoelectric pressure sensors is arranged in the high-pressure pulse fracturing generation chamber. The propagation characteristics of the high-voltage electric pulse stress shock waves in the coal rock mass can be accurately and directly captured in real time, and accurate and reliable data support is provided for deep research on a high-voltage pulse electric crushing mechanism.

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.