470 results about "Electromagnetic pulse" patented technology

The invention belongs to the technical field of additive manufacturing, and particularly relates to a strong electromagnetic pulse-ultrasonic auxiliary electric arc additive manufacturing platform. The platform body is provided with an upper substrate used for providing an initial plane for electric arc additive manufacturing; the water cooling device comprises a water cooling box used for containing cooling water, and the substrate is contained in the water cooling box; the base plate locking clamp comprises a positioning clamping table and a clamping device. The positioning clamping table and the clamping device are arranged on the two sides of the upper base plate and matched to form a fixing structure for fixing the relative positions of the upper base plate and the platform body. The welding gun head is connected with the six-axis mechanical arm and is used for carrying out additive manufacturing on the upper substrate; the clamping device and the welding gun head are arranged on the two opposite sides of the upper base plate in a spaced mode. And the clamping device is partially arranged outside the water cooling box. The clamping device and the welding gun head are arranged on the two sides of the water cooling box respectively, space interference between the clamping device and the welding gun head in the working process can be effectively avoided, meanwhile, a principle heat source of the clamping device can be guaranteed, and normal work of the clamping device is guaranteed.

The invention relates to the technical field of unmanned aerial vehicle radio detection, in particular to an unmanned aerial vehicle detection and judgment method based on cooperation of an air-ground system and radio detection, and the method comprises the steps: finding a suspected target through scanning of a multi-frequency-band radar, triggering an infrared thermal imager carried by an aerial unmanned aerial vehicle to approach an ultra-wide-frequency-band spectrum sensor for verification; accurate positioning is realized by combining ground photoelectric equipment multi-view triangulation positioning and a signal arrival time difference algorithm, a command and control center calculates threat levels through a multi-source data fusion engine, and navigation decoy of dynamically adjusting intensity is adopted for targets smaller than or equal to two levels. Hard killing of ground laser locking rotor center and air electromagnetic pulse synchronous coverage is executed on a target of more than or equal to three levels, the equipment state is synchronized in real time through an optical fiber link, high-energy-consumption equipment is intelligently closed after threat is relieved, a platform starting strategy is optimized, a detection closed loop of'three-dimensional perception-graded treatment-intelligent energy saving 'is constructed, and the intelligent energy saving effect is achieved. And an efficient and accurate low-altitude safety protection scheme is provided for a sensitive area.

According to the radio frequency device strong electromagnetic pulse damage on-line monitoring method and system, the incident power, the output power and the reflection power of the tested radio frequency device are monitored in real time, then whether the tested radio frequency device is damaged or not is judged through comprehensive comparison and analysis, and the function of monitoring the state of the tested radio frequency device on line in real time is achieved. The device is used for monitoring the damage state of the radio frequency device under the strong electromagnetic pulse injection test in real time, the test efficiency is improved, the damage probability to the strong electromagnetic pulse injection source after the radio frequency device is damaged is reduced, and the test range of a traditional off-line measurement method of the test is expanded. The device is used for on-line damage monitoring during the strong electromagnetic pulse injection test of the radio frequency device, the test efficiency can be improved, test equipment can be protected, the defects of traditional off-line detection can be overcome, and the device has important significance in carrying out the strong electromagnetic pulse injection effect test of the radio frequency device and obtaining the damage threshold value of the radio frequency device.

Offline prior to operation, an optimised control sequence is derived for a pulse system comprising a reactive circuit for generating electromagnetic pulses, such as a transcranial magnetic stimulation circuit, and cascaded switching modules for switchably connecting capacitive discharge elements to provide a multi-level output voltage for the reactive circuit. A discrete-time model predicts an electrical state of the pulse system. A target profile for an electromagnetic pulse is received. For respective time-steps of the control sequence taken in succession, an optimal path of switching states over a window of time-steps starting with the respective time-step is derived, optimising a cost function having a deviation cost contribution representing deviation of an electrical state of the pulse system predicted by the discrete-time model from the target profile over the window. The switching state of the determined path at the respective time-step is selected for the control sequence.

The invention provides a three-dimensional winding imaging de-noising method and system based on a physical constraint optimization algorithm, and belongs to the field of ultrasonic imaging de-noising, and the method comprises the steps: collecting and preprocessing an ultrasonic echo signal of a transformer winding, and generating a joint coordinate matrix; recombining the joint coordinate matrix into a three-dimensional winding data parameter matrix, constructing a physical constraint term based on an amplitude and energy coupling relationship of ultrasonic waves in a winding medium, and constructing a fitness function for evaluating coordinate data quality in combination with the physical constraint term; initializing an iteration parameter and a solution space boundary parameter of a physical constraint optimization algorithm, and executing multiple rounds of iteration optimization by taking the three-dimensional winding data parameter matrix as initial data until a convergence condition is met; and generating a de-noised three-dimensional winding image through coordinate system mutual verification and three-dimensional point cloud reconstruction by using the optimized coordinate parameters. According to the invention, the interference of electromagnetic pulse noise of a specific frequency band is effectively suppressed, and the precision and definition of three-dimensional winding imaging are improved.

The invention provides a directional ultra-short strong field electromagnetic pulse generation device, a plasma channel is formed through laser targeting gas and ultra-short strong field electromagnetic pulses are generated, the device comprises a high-power laser, a laser focusing module, a gas target module and a vacuum cavity, the high-power laser is used for generating femtosecond laser pulses and emitting the femtosecond laser pulses into the vacuum cavity; the laser focusing module is arranged in the vacuum cavity and is used for focusing femtosecond laser pulses generated by the high-power laser onto the gas target; the gas target module is arranged in the vacuum cavity and used for generating a high-density gas target and spraying the high-density gas target upwards, and a gas spraying opening of a gas target nozzle is located below the laser focus and can be adjusted in an electric control mode. According to the invention, escape electrons with charge quantity larger than that of a solid target and a low-density gas target can be generated, and laser forms arc discharge similar to thunder and lightning cloud in near-critical density plasma to generate EMP, so that electromagnetic radiation which is stronger than that of the solid target and far better than that of a common gas target can be generated.

The invention relates to the technical field of electronic component parameter optimization, in particular to an electronic component parameter optimization method and system, and the method comprises the following steps: collecting high-frequency measurement data of an electronic component; performing preliminary interference separation on the high-frequency measurement data to identify and suppress continuous waveform distortion caused by impedance mismatching of the transmission line and accidental transient electromagnetic pulses caused by reduction of shielding capability of the transmission line, and obtaining data after preliminary interference separation; performing purity evaluation on the data after the preliminary interference separation to quantify the degree of residual interference in the data after the preliminary interference separation to obtain a purity evaluation result; and dynamically adjusting an optimization strategy and a data weight of an electronic component parameter optimization program according to a purity evaluation result so as to carry out electronic component parameter optimization. The accuracy and efficiency of parameter optimization of the electronic component can be improved.

The application provides a kind of box-type substation monitoring method and device, system, storage medium, belong to substation monitoring technical field, this method includes: based on the discharge data of box-type substation that first ultrasonic wave data is corrected to the electromagnetic pulse data collected by electromagnetic sensor in box-type substation;Box-type substation discharge data is compared with preset threshold value, whether the fault of box-type substation occurs is judged;Wherein, first ultrasonic wave data is the data collected by ultrasonic sensor in different positions in box-type substation;In response to the fault of box-type substation, the fault position of box-type substation is determined based on discharge data using time difference positioning method;Based on fault position, the operation state data of box-type substation is analyzed to determine fault type, and the parameters of box-type substation are compensated based on the compensation mode corresponding to different fault types.The application adopts multi-modal compensation strategy based on fault type, to improve the power supply reliability of box-type substation.

The invention relates to the technical field of film material mechanical stress testing, and discloses PET protective film tension testing equipment which comprises an equipment detection table, a detection groove is formed in the middle of the upper end face of the equipment detection table, and an unwinding roller is installed on the upper end face of the equipment detection table and located on the left side of the detection groove. A winding roller is installed on the upper end face of the equipment detection table and located on the right side of the detection groove, and the unwinding roller and the winding roller pull the PET film. A blowing structure is designed, on one hand, an electromagnetic pulse valve on a pulse pipe is opened in a small part, so that part of gas in a gas supply tank sequentially flows at a lower flow speed and is sprayed out from a gas spraying bent pipe to blow a film sample below, and a bent edge-warping part is stretched and smoothed; on the other hand, the electromagnetic pulse valve on the pulse pipe is completely opened, so that part of gas in the gas supply tank sequentially flows at a relatively high flow speed and is sprayed out from the gas spraying bent pipe, and membrane sample wastes adhered to the first membrane pressing groove, the second membrane pressing groove and the membrane pressing block are cleaned.

The utility model belongs to the technical field of electromagnetic pulse welding, and particularly relates to a magnetic pulse welding device based on welding area maximization, a coil is arranged in a base, one surface of the base is used for arranging a flying plate and a supporting block and is provided with a through groove, and the working surface of a welding working area is in a concave arc shape and is arranged towards the through groove; the supporting block is used for supporting a workpiece with curvature, and the fixing structure is used for fixing the flying plate and the workpiece with curvature; during welding, the generatrix of the to-be-welded area of the workpiece with the curvature is parallel to the generatrix of the working face of the welding working area, and the to-be-welded area of the workpiece with the curvature coincides with the working face of the welding working area in the projection direction from the workpiece with the curvature to the welding working area. According to the utility model, the collision point position and the collision angle of the flying plate and the workpiece with curvature can be improved, the effective connection area of the welding area of the flying plate and the workpiece with curvature is increased, the excessive melting of an interface is avoided, and the strength of a welding joint is effectively improved.

The invention discloses an electromagnetic pulse coupling signal separation method based on optimized variational mode decomposition, and belongs to the field of signal processing. The method comprises the following steps: carrying out injection test on an engine rotating speed control system shielding wire harness, and constructing an electromagnetic pulse coupling signal data set; a population initialization process of a parrot algorithm is improved by adopting spatial pyramid matching chaotic mapping, population diversity is improved by utilizing uniform ergodicity and initial value sensitivity of a chaotic sequence, and premature convergence is avoided; a mirror reflection learning strategy is introduced to improve the optimization precision and convergence speed of the parrot algorithm; optimization is carried out by using input parameters of improved parrot optimization variational mode decomposition, and mode decomposition is carried out on electromagnetic pulse coupling signals of a rotating speed control system; and calculating a kurtosis factor of each intrinsic mode function, and selecting a reconstruction target signal of the intrinsic mode function with the minimum kurtosis factor. According to the method, efficient and accurate electromagnetic pulse coupling signal separation can be realized, and the stability and reliability of the system in a strong electromagnetic interference environment are improved.

The invention relates to the technical field of geophysical exploration, and discloses a three-dimensional fine electromagnetic detection method for ore control fracture of a deep gold ore. The method comprises the following steps: arranging a measuring point array to emit a coding artificial electromagnetic pulse signal, and synchronously receiving a plurality of induced magnetic field responses to form an original data volume; estimating a noise baseline based on statistical distribution and adaptively calibrating data; constructing a spatial correlation network by using the time sequence correlation of adjacent measuring points, and identifying a high-connectivity cluster as a suspected fracture region; extracting a regional time sequence to perform multi-level clustering, and screening a typical fracture response mode; based on the mode set global matching enhancement response, generating an enhancement data volume; multi-scale three-dimensional tensor decomposition is adopted to extract a tensor kernel component, and an electrical structure is reconstructed according to the spatial compactness and energy attenuation characteristics of the tensor kernel component; and finally, iteratively fusing with a geological constraint model to output a three-dimensional ore control fracture fine detection result. According to the method, intelligent identification and high-precision imaging of the deep fracture are realized.

The invention provides an unmanned aerial vehicle dynamic path planning method and system for a strong electromagnetic interference environment, and relates to the field of unmanned aerial vehicle navigation and interference resistance. The method mainly solves the problem of robust positioning of an optical sensing system in a strong electromagnetic environment. The core of the method lies in a spectrum anti-noise technology of a visual SLAM module, and spectrum separation of visible light and near-infrared band electromagnetic noise is realized through electromagnetic shielding packaging and an adaptive imaging algorithm of a multispectral camera. According to the method, a time-frequency double-domain filtering algorithm is adopted, the phenomena of light intensity abrupt change and frequency spectrum aliasing generated by electromagnetic pulses are eliminated in the feature extraction stage, and the electromagnetic interference mismatching rate of ORB feature points is reduced to 2% or below. The optimized feature point cloud keeps electromagnetic immune characteristics in the dynamic updating process, centimeter-level positioning precision can be achieved in the field intensity environment of 30 dBm or above, and meanwhile real-time detection of dynamic obstacles is achieved through an optical flow acceleration constraint mechanism.

The invention discloses an electromagnetic pulse simulation method and device, electronic equipment and a storage medium, and relates to the technical field of electromagnetic pulse simulation. The pulse compression loop module is used for performing sharpening treatment to form a double-exponential waveform conforming to high-altitude electromagnetic pulse characteristics, and meanwhile, an upper polar plate and a lower polar plate of the transmission line structure module are used for converting pulse energy into a bounded wave radiation field so as to simulate the coupling effect of the high-altitude electromagnetic pulse on ground equipment; and finally, a PoE port effect experiment module is injected to evaluate the response characteristic, the damage mechanism and the system-level failure behavior, so that the problems of insufficient waveform reproduction precision, huge system size and difficulty in deployment caused by the adoption of a traditional Marx generator and a modular splicing structure in an existing high-altitude electromagnetic pulse simulation method can be solved; the technical effect of improving experiment repeatability and protection design accuracy is achieved.

A high altitude electromagnetic pulse (HEMP) or other similar geomagnetic disturbance (GMD) has the potential to severely impact the operation of large-scale electric power grids by introducing low-frequency common-mode (CM) currents which deteriorate the performance of key grid components, such as large power transformers. A solid-state transformer (SST) can replace susceptible equipment and improve grid resiliency by safely redirecting, absorbing, and / or converting these CM insults.

The invention belongs to the field of high-purity indium preparation, and provides a method for preparing high-purity indium based on ultrasonic vacuum distillation-electromagnetic pulse zone melting purification, the method combines vacuum distillation and zone melting purification technologies, ultrasonic waves are applied in the vacuum distillation process to assist in removing low-boiling-point impurities such as Cd, Zn and the like, and the purity of the high-purity indium is improved. In the zone melting process, pulse current is applied through an induction coil to assist in removing impurities mainly including Sn, Pb and Fe, and stable preparation of a high-purity indium product with the purity larger than or equal to 99.9995% and the oxygen content smaller than or equal to 2 ppm is achieved by screening and controlling technological conditions. According to the method, the requirement for the purity of the raw material indium is low, and the preparation cost of a high-purity indium product can be reduced.

The invention discloses a transmission tower angle steel electromagnetic pulse fastening system, which belongs to the technical field of transmission tower angle steel fastening, and is characterized in that a track subsystem is rigidly connected with an operation table to realize movement and position adjustment in an operation environment; the charging control platform comprises a power supply device, a capacitor, an SCR power voltage regulator and voltage sensors, the power supply device is connected with the capacitor, and the voltage sensors are connected to the two ends of the capacitor; the charging control platform regulates and controls the charging process of the capacitor through the SCR power voltage regulator; the electromagnetic pulse generation subsystem is connected with the charging control platform, and the electromagnetic pulse generation subsystem is used for generating electromagnetic pulses to achieve fastening operation of angle steel of the power transmission tower; the monitoring feedback subsystem is used for monitoring the operation state of the transmission tower angle steel electromagnetic pulse fastening system in real time. The electromagnetic pulse technology is combined with the field of angle steel reinforcement, and the problems that existing electromagnetic pulse crimping equipment is inconvenient to move, depends on an external power supply, is inaccurate in charging control, and is difficult to monitor the running state in real time are solved.

The invention discloses an ancient building lightning protection system and method based on a lightning early warning device, and belongs to the technical field of lightning protection systems, and the system comprises a sensing layer, a decision layer, an execution layer and a digital twin platform. The sensing layer collects multi-mode environmental parameters through an annular atmospheric electric field monitoring array, a broadband electromagnetic pulse sensor and a meteorological sensor. The decision-making layer fuses data and outputs four levels of risk levels through the risk prediction model of the ancient building LSTM combined attention mechanism, and generates a protection instruction; and the execution layer adopts a bionic hidden lightning receiving device (hidden in a non-working state), a passive corona field lightning driving device and a multi-stage historic building SPD, and responds according to a grading strategy. The digital twin platform constructs a high-precision model, and realizes data visualization and protection strategy simulation optimization. Passive lightning protection is converted into active intelligent protection, the situation that a traditional device destroys the style and appearance of an ancient building is avoided, secondary damage caused by lightning stroke is reduced, self-learning optimization can be achieved, and the requirements for safety and cultural relic protection are met.

The invention discloses a real-time damage detection device for a communication receiver under strong electromagnetic pulse impact, and belongs to the field of electromagnetic compatibility. According to the device, different signal injection modes are adopted, the injection power and the injection duration of signals are adjusted, an injection experiment of high-power electromagnetic pulses is carried out, and the damage condition of the communication receiver under strong electromagnetic pulse attack in a complex electromagnetic environment is simulated through the working state of the most sensitive first-stage low noise amplifier of the receiver, so that the reliability of the communication receiver is improved. And real-time damage detection is carried out, and exploration about damage conditions is carried out, so that timely maintenance and further protection of the communication receiver in a complex environment are facilitated. The device can simulate the impact effect of strong electromagnetic pulses on the communication receiver, comprehensively monitor the working state of the communication receiver in real time and record the damage condition, provide core support for rapid positioning and isolation of fault equipment, and remarkably shorten the communication link repair time.

The invention relates to the technical field of electromagnetic pulse welding detection, and discloses an electromagnetic pulse welding seam surface quality detection method based on a convolutional neural network. The method comprises the following steps: acquiring a multispectral surface image of a welding joint, and generating a preprocessed image sequence through gray normalization and noise suppression; constructing a multi-scale feature fusion convolutional neural network, inputting a preprocessed image, and extracting weld deep features through alternately stacked expansion convolutional layers and cavity space pyramid pooling layers; inputting the deep features into a bidirectional long-short-term memory network for time sequence modeling, and generating a space-time correlation feature vector; adopting adaptive threshold segmentation to mark suspected defect area parameters; intercepting a corresponding region, calculating texture complexity and spectral reflectivity, and generating a defect candidate feature set; and matching a standard defect library to determine defect categories, dynamically updating the library, and outputting a report with defect labels, a thermodynamic diagram containing defect positions and a batch qualification rate.

The utility model relates to the technical field of electromagnetic valves, and discloses a dustproof energy-saving electromagnetic pulse valve which comprises a valve body, a connecting shell is fixedly connected to the bottom end of the valve body, air bags are fixedly connected to the front end and the rear end of the connecting shell, an electromagnet is fixedly connected to the top end of the valve body, and fixing rings are fixedly connected to the outer walls of the left end and the right end of the valve body. The back-to-back ends of the fixing rings are connected with a plurality of screws through transmission sets, the outer walls of the back-to-back ends of the screws are in threaded connection with moving blocks, the outer walls of the moving blocks are connected with extrusion plates through extrusion sets, the left end and the right end of the valve body are fixedly connected with fixing pipes, and the inner walls of the fixing pipes are fixedly connected with air bags. A circulating fan is mounted at the top end of the inner wall of the connecting shell. According to the utility model, the flexible butt joint of the valve body and pipelines with different diameters is realized, the installation process is simplified, the universality and applicability of equipment are improved, dust entering the valve body is reduced, and the liquid flow adjusting power of the valve body is maintained.

The application discloses an alloy vacuum self-consumption electric arc smelting magnetic pulse grain refining device, which comprises a vacuum self-consumption electric arc furnace body and a copper crucible, a metal molten pool is arranged in the copper crucible, a plurality of non-contact magnetic pulse coils are wound on the outer wall of the copper crucibble, and a water-cooling interlayer is arranged between the vacuum self-consumption electric arc furnace body and the copper crucible; a screw rod is arranged between the vacuum self-consumption electric arc furnace body and the copper crucible, and the screw rod is connected with a motor. The application further discloses a method for alloy vacuum self-consumption electric arc smelting magnetic pulse grain refining, cooling water is introduced into the water-cooling interlayer, a power supply of the vacuum self-consumption electric arc furnace is turned on for smelting, a pulse power supply is turned on when the height of the metal molten pool formed at the bottom of the copper crucible reaches 50 mm, and the plurality of non-contact magnetic pulse coils are uniformly moved upwards until the process is finished. The metal molten pool is directionally treated by electromagnetic pulse in a moving mode, the columnar crystal-equiaxed crystal transition is realized in the alloy ingot preparation process, the grain is refined, and segregation is reduced, so that the overall organization of the large-size long ingot is refined.

The invention discloses an intelligent pulse dust collector monitored by Internet of Things and a control method, the intelligent pulse dust collector comprises a pulse dust filter main body and an Internet of Things monitoring system, the main body comprises a sealed upper box body, a lower box body, electromagnetic pulse valves arranged in groups, a dust filtering assembly and a scraper assembly; the Internet of Things monitoring system is composed of a sensing module, a control module, a communication module and a cloud Internet of Things platform. The sensing module is used for collecting operation parameters such as filter bag resistance and dust concentration and equipment states through multiple types of sensors; the control module adopts an edge calculation module and PLC dual-core architecture, operates a multi-parameter fused intelligent ash removal decision algorithm, and generates a targeted control instruction to drive an execution mechanism to act; the communication module realizes data interaction through wired and wireless dual modes, and the cloud platform supports remote monitoring, control, fault early warning and data analysis. The problems that traditional equipment is rigid in ash removal, inconvenient to operate and maintain and the like are solved, the dust removal efficiency and the equipment reliability are remarkably improved, and the energy consumption and the operation and maintenance cost are reduced.

The invention relates to the technical field of electromagnetic pulse simulators, and solves the technical problems of low efficiency, limited debugging precision and high debugging cost when an existing pulse source debugging system and method of an electromagnetic pulse simulator are used for debugging a pulse source of the electromagnetic pulse simulator. The invention discloses a pulse source debugging system and method for a large horizontal polarization radiation wave electromagnetic pulse simulator. According to the method, under the condition that only a simple dummy load module is connected, the influence of ground reflection and cone bottom reflection on a radiation electric field waveform index is avoided by reasonably arranging the position of an electric field sensor, and a radiation electric field waveform parameter at the actually measured electric field sensor is directly used as a debugging basis of a pulse source; and dynamically adjusting the state of the to-be-debugged pulse source through the remote control end. Therefore, large-scale antenna erection is avoided, and the requirements on debugging sites and environments are obviously reduced; the limitation of traditional indirect parameter debugging is broken through, and the accuracy of pulse source state parameters is improved; the debugging efficiency is greatly improved, the research and development period is shortened, and the cost is reduced.

The invention discloses an electric reactor transient arc detection method, device and equipment and a medium. The method comprises the steps that an optical signal, an acoustic signal and an electromagnetic pulse signal in an electric reactor oil tank are collected in real time; arc fault diagnosis is carried out based on the optical signal, the sound signal and the electromagnetic pulse signal, and a diagnosis result is obtained; and executing a protection action based on the diagnosis result. According to the invention, multi-parameter signal synchronous monitoring can be realized, and the risk of missing report caused by limitation of a single signal is reduced; in addition, the characteristics of the electric arc in the oil are used as a criterion, so that the probability of false alarm and missing alarm is reduced.

The utility model discloses a fault detection device for a blowing valve of a dust remover, which relates to the technical field of dust removers, and one end of a blowing pipe of the dust remover is provided with the blowing valve for opening and closing the blowing pipe. The upper part of the swinging block is hinged to the mounting frame through a hinge shaft; the swing in-place sensor is mounted on the mounting frame; the detection end of the swing in-place sensor corresponds to the lower part of one side wall of the swing block in the axial direction of the hinge shaft in a static state so as to detect the swing state of the swing block; an air inlet of the air blowing branch pipe is connected and communicated with the blowing pipe, and an air outlet of the air blowing branch pipe corresponds to the lower part of one side wall in the swinging direction of the swinging block so as to drive the swinging block to swing away from the detection end of the swinging in-place sensor during air blowing; and the controller is electrically connected with the blowing valve and the swing in-place sensor so as to receive a detection signal sent by the swing in-place sensor. The working state of the electromagnetic pulse valve can be diagnosed in time, so that the dust removal effect is prevented from being influenced, and the dust remover can be ensured to have a better dust removal effect.

The invention discloses a charging optimization method and system in a cable electromagnetic pulse connector crimping technology, and belongs to the technical field of cable connector crimping. The method comprises the steps that a charging control system is started, and a power module is used for providing initial charging current for a capacitor; the voltage of the capacitor is monitored in real time through voltage sensors at the two ends of the capacitor, and voltage data is fed back to the charging control module; a current sensor in the charging loop is used for monitoring the charging current of the capacitor in real time, and current data is fed back to the charging control module; the charging control module adjusts the current and voltage of the power supply module according to the feedback of the voltage sensor and the current sensor, so that the capacitor is charged according to a set charging curve. According to the invention, the problems of inaccurate charging process control, lack of effective monitoring feedback, low charging efficiency and the like in the existing cable electromagnetic pulse joint crimping process are solved, so that the crimping quality is improved, the equipment damage is avoided, the production cost is reduced, and the stability and safety of power transmission are ensured.

The utility model discloses an electromagnetic pulse air pressure spray water gun, which relates to the technical field of fire extinguishing devices and comprises an electromagnetic pulse spray water gun body, an internal structure and an external structure, the internal structure is fixedly connected inside the electromagnetic pulse spray water gun body, and the external structure is fixedly connected outside the electromagnetic pulse spray water gun body. The reciprocating piston slides on the surface of the connecting guide rod at a high speed under the action of magnetic force of the transmitting coil, the reciprocating piston moves to push out a fire extinguishing agent in the water storage chamber from an opening shaped like a Chinese character'mi 'in the surface of the rubber front baffle for extinguishing fire, and the electromagnetic pulse spraying water gun body takes electromagnetism as a power source which is much better than high-pressure gas; the electromagnetic pulse spraying water gun is lighter than a pulse air pressure spraying water gun, the electromagnetic pulse spraying water gun body is more convenient and flexible in maneuverability, a standby power supply is much lighter than a standby air cylinder, and the size is much smaller.

The invention relates to the technical field of communication, in particular to a broadband radiation field generation and measurement system and a maximum shielding effectiveness estimation method. The system mainly comprises a transmitting end and a receiving end. The transmitting end is composed of a signal generator, a power amplifier and a monopole antenna, and the flexible deployment problem of the high-size monopole mooring antenna is solved by adopting an unmanned aerial vehicle air stretching mode; the receiving end is composed of an annular antenna, a low-noise amplifier and a spectrum analyzer, the spectrum analyzer is used for detecting low-frequency signal characteristics in the shielding body, the low-frequency signal characteristics are substituted into the maximum shielding effectiveness estimation method, and the maximum shielding effectiveness value is obtained through calculation. The system is flexible, detection and analysis of wide-range electromagnetic pulse signals can be achieved by adjusting the frequency of transmitted signals and replacing corresponding transmitting and receiving antenna types, and therefore the system can be widely applied to shielding effectiveness measurement.

The invention provides a WAPI access module driver-free access method, which comprises the following steps: acquiring a transient electromagnetic pulse intensity magnitude of a WAPI access module in substation deployment, recording data packet error code position distribution, acquiring an actual distance measurement result of the module and a terminal, and forming a comprehensive monitoring record; identifying an interference area division boundary according to the comprehensive monitoring record, extracting an anti-interference shielding demand level and an anti-interference frequency band coverage range, and obtaining a specific interference intensity magnitude distribution file of the area; according to the thickness partition candidate implementation scheme, identifying the influence degree of the volume increase of the shielding layer on the installation position far away from the communication node, and obtaining a signal path extension risk assessment result; and evaluating the communication delay increase and the signal attenuation degree when the signal path extension risk evaluation result exceeds the drive-free access allowable range, and generating an adjusted shielding layer thickness partition implementation scheme.