Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

713 results about "Electromagnetic pulse" patented technology

An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Such a pulse's origin may be a natural occurrence or man-made and can occur as a radiated, electric, or magnetic field or a conducted electric current, depending on the source.

Unmanned aerial vehicle multi-dimensional information fusion method and system based on acousto-optic-electric composite detection

The invention provides an unmanned aerial vehicle multi-dimensional information fusion method and system based on acousto-optic-electric composite detection. According to the method, acoustic frequency band signals, visible light image sequences and electromagnetic field intensity change data are collected, acoustic characteristic flow, optical characteristic flow and electrical characteristic flow are generated, and based on the time deviation between a low-frequency vibration mode and transient electromagnetic pulses, multi-channel dynamic calibration is carried out on an image distortion area in the optical characteristic flow. The method comprises the following steps: acquiring an acoustic feature flow, an optical feature flow and an electrical feature flow, correcting space-time coordinate parameters of the acoustic feature flow, the optical feature flow and the electrical feature flow, generating a calibration feature flow, carrying out anti-interference fusion processing on the calibration feature flow, extracting multi-dimensional coupling features, inputting the multi-dimensional coupling features into an unmanned aerial vehicle flight path planning model, and generating a three-dimensional space situation model; according to the invention, the physical space-time consistency alignment and noise suppression of the multi-modal data are realized, and the obstacle positioning precision and the dynamic trajectory prediction real-time performance are significantly improved.
Owner:ZHONGLIAN GOLDEN CROWN INFORMATION TECH (BEIJING) CO LTD

Electromagnetic pulse data transmission method

The invention relates to the technical field of electromagnetic pulses, and discloses an electromagnetic pulse data transmission method. The method comprises the following steps: collecting natural electromagnetic pulse signal data of a detection target area through a six-dimensional complementary electrode array structure, and executing Kalman filtering peak extraction and characteristic frequency locking to obtain frequency-optimized signal data; executing first-order and second-order gradient difference matrix calculation and space vector synthesis to obtain signal source position coordinate data and signal intensity data; performing spectral domain reconstruction and multilayer dynamic threshold analysis to obtain a spatial clustering abnormal data packet; and selecting an optimal transmission channel to transmit the spatial clustering abnormal data packet to a cloud server. According to the invention, the influence of an external interference source is effectively eliminated, accurate extraction and characteristic frequency locking of effective frequency band signals are realized, power frequency and harmonic interference thereof are effectively suppressed, the signal-to-noise ratio of the effective frequency band of the signals is improved, and the reliability and timeliness of data transmission in a severe field environment are ensured.
Owner:SHAANXI HAOXING KUNDA NEW ENERGY TECH CO LTD

Transient electromagnetic three-dimensional embankment leakage hidden danger detection method based on unmanned aerial vehicle carrying

The invention discloses a transient electromagnetic three-dimensional dike leakage hidden danger detection method based on unmanned aerial vehicle carrying, and the method comprises the steps: S1, scanning a detection region range, obtaining dike terrain remote sensing image and point cloud image data, and setting a flight path of an unmanned aerial vehicle according to a preset detection region range; s2, performing task flight, and transmitting transient electromagnetic pulse signals with different frequencies to the underground of the dike through a transmitting coil according to a transmitting current frequency range; s3, a receiving coil is used for synchronously collecting secondary electromagnetic response signals generated by underground medium induction, discretization sampling is conducted on the collected signals according to the sampling time interval, and a sampling data sequence is obtained; s4, constructing a three-dimensional resistivity model of the dike underground medium through a three-dimensional inversion algorithm; and S5, through the constructed three-dimensional resistivity model, multi-dimensional features of the leakage hidden danger are extracted, and an area with the leakage hidden danger in the dike is identified. The leakage hidden danger area can be rapidly identified, and the detection efficiency and precision are improved.
Owner:JIANGXI ACAD OF WATER RESOURCES (JIANGXI PROVINCE DAM SAFETY MANAGEMENT CENT JIANGXI PROVINCE WATER RESOURCES MANAGEMENT CENT)

Geological stress concentration area intelligent identification method

The invention relates to the technical field of intelligent identification, and discloses an intelligent identification method for a geological stress concentration area. The method comprises the steps that a plurality of vector electromagnetic induction coils are arranged in a monitoring area in a latticed mode, and original electromagnetic pulse signals containing components in the X direction, the Y direction and the Z direction are collected; performing denoising and time-frequency analysis on the original electromagnetic pulse signal to obtain a multi-dimensional data cube; processing the multi-dimensional data cube by using an integer linear programming model and an adaptive fuzzy correction algorithm to obtain a corrected electromagnetic pulse signal data set; performing decomposition and mapping relation construction on the corrected electromagnetic pulse signal data set to obtain a geological stress distribution estimation value; and constructing a geological stress concentration area three-dimensional model according to the geological stress distribution estimation value. According to the method, the stress field boundary identification precision is enhanced, and the blind area is reduced, so that high-precision stress field reconstruction under complex geological conditions is realized.
Owner:SHAANXI HAOXING KUNDA NEW ENERGY TECH CO LTD

Intelligent detection system of high and low voltage power distribution cabinet and detection method thereof

The invention relates to the technical field of power distribution cabinet detection, and discloses an intelligent detection system and method for a high-low voltage power distribution cabinet, and the system comprises a data collection module, a feature extraction module, a network construction and updating module, a fault positioning module, a positioning map generation module, and a self-healing control module. The method comprises the following steps: generating a multi-physical field coupling data set by synchronously collecting electromagnetic radiation spectrum and cabinet vibration waveform, performing time-frequency domain conjoint analysis to extract fault feature vectors, constructing and dynamically updating a fault propagation network, identifying key fault sources by combining betweenness centrality and historical case matching, and generating a fault positioning map; accurate self-healing control is realized by applying reverse electromagnetic pulse and adjusting contact pressure based on the atlas; according to the invention, the problems of low positioning precision and mechanical self-healing control means during detection of the high-low voltage power distribution cabinet are solved, and the fault detection efficiency and reliability are significantly improved.
Owner:CSSC SILENT ELECTRIC SYSTEM (WUXI) TECHNOLOGY CO LTD +1

Leaky coaxial resonant sensor systems and methods

A disclosed leaky coaxial resonant sensor system and methods. In use, the system includes at least one split-ring resonator (SRR) embedded within a material of the component. The at least one SRR is formed from a composite material. Additionally, the at least one SRR is configured to resonate at a first frequency in response to an interrogation signal from a leaky coaxial cable antenna. In some aspects, each SRR may resonate at a first frequency in response to an electromagnetic ping when the composite material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the composite material is in a second state. A resonant frequency of the composite material may be based on physical characteristics of the composite material.
Owner:LYTEN INC

Electromagnetic shielding method and shielding system for power distribution

The invention relates to an electromagnetic shielding method and shielding system for power distribution, and belongs to the technical field of electromagnetic shielding. Comprising the following steps: establishing a shielding model corresponding to the shielded room according to volume data of the shielded room; simulating and positioning electromagnetic wave conditions in the shielded room in the shielding model; selecting key detection points; constructing a phase difference matrix; shielding requirements of different waveforms in the same frequency band are distinguished, leakage path positioning based on a waveguide equation is carried out, and a core leakage area and an auxiliary protection area are divided. According to the electromagnetic shielding method and shielding system for power distribution provided by the invention, the dynamic adaptability of electromagnetic shielding and the detection capability of transient electromagnetic pulses are remarkably improved, and a multi-dimensional risk quantification and differentiation reinforcement strategy is realized. Meanwhile, intelligent materials and a dynamic optimization mechanism are adopted, the material utilization rate and the protection effect are improved, and a reinforcing effect feedback closed loop is formed.
Owner:WUXI ANXIN SHIELDING EQUIP CO LTD

Optical fiber communication line fault feedback system

The invention provides an optical fiber communication line fault feedback system, which relates to the technical field of optical fiber communication fault diagnosis, and comprises a data acquisition module, a feature extraction module, a feedback module and a fault feedback module, according to the method, the attenuation rate, the reflectivity, the packet loss rate, the temperature, the humidity, the vibration signal, the electromagnetic pulse signal and the radio frequency interference signal of the optical fiber communication line are obtained; compared with the prior art, the method comprehensively considers the influence of communication related parameters and environment related parameters, achieves the comprehensive evaluation of the optical fiber communication line, and improves the evaluation accuracy of the optical fiber communication line. Therefore, the accuracy of subsequent fault diagnosis and fault classification is improved.
Owner:NANJING UNIV OF POSTS & TELECOMM

Electromagnetic pulse collaborative deicing system based on multi-mode sensing and self-adaptive control method

The invention relates to an electromagnetic pulse collaborative deicing system based on multi-mode perception. The system comprises a power supply system; the FPGA controller is used for logic control and signal processing, calculating electromagnetic pulse parameters and realizing high-speed and accurate deicing instruction scheduling; a sensing module; a real-time detection system; a pulse generation unit; and the deicing module executes an electromagnetic pulse deicing action and efficiently removes ice covered on the surface of the power grid. The invention further discloses an electromagnetic pulse collaborative deicing method based on multi-mode sensing. Through the electromagnetic pulse technology, the power transmission and distribution line ice can be efficiently removed, compared with a traditional thermal ice melting method, the energy consumption is greatly reduced, the response speed is remarkably increased, and the deicing strategy and parameters are dynamically adjusted according to real-time monitoring data based on the real-time signal processor of the FPGA; the power supply priority can be dynamically adjusted according to the energy supply condition, the energy is improved to the maximum extent, and an accurate deicing basis is provided for the system.
Owner:HEFEI UNIV OF TECH

Rolling stress relief and plate shape flatness coordinated optimization method in strip steel annealing process

The invention provides a rolling stress relief and plate shape flatness coordinated optimization method in a strip steel annealing process, which comprises the following steps of: performing segmented dynamic tension control, dual-frequency electromagnetic field temperature control, gradient pulse stress reconstruction and electromagnetic-pulse multi-target coupling optimization; the problems that heat conduction lags behind, residual stress release is not thorough and flatness control is insufficient in a traditional process are solved, and the method has the advantages that stress elimination and plate shape control are synchronously optimized, recrystallization uniformity is improved, and residual stress is reduced.
Owner:阳江宏旺实业有限公司

One-way valve air tightness detection method and system

The invention discloses a one-way valve air tightness detection method and system, and relates to the technical field of air tightness detection.According to the one-way valve air tightness detection method and system, through dynamic interaction of AI virtual sensor prediction and physical detection values and combination of time-frequency domain signal fusion, the extraction capacity of micro-leakage signals is remarkably enhanced, and misjudgment caused by background noise or residual gas in a traditional method is avoided; a multi-mode interference source correlation analysis and dynamic weight distribution mechanism is utilized to actively identify and compensate composite interference such as temperature drift and electromagnetic pulse, so that the reliability of a detection result in severe scenes such as workshop vibration and airflow disturbance is improved; and meanwhile, a model adaptation module based on transfer learning and non-contact vibration spectrum monitoring are adopted, manual parameter adjustment dependence is reduced, valve bodies of different specifications are rapidly adapted, early damage of the diaphragm is warned in advance, and the equipment maintenance period is prolonged.
Owner:JIANGXI ZHONGJIE MEDICAL INSTR CO LTD

Strong electromagnetic pulse-ultrasonic auxiliary electric arc additive manufacturing platform

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.
Owner:ZHEJIANG UNIV OF TECH

Far-zone electromagnetic pulse waveform simulation method and system

ActiveCN119808449ADesign optimisation/simulationElectron collisionIonosphere
The invention provides a far-zone electromagnetic pulse waveform simulation method and system, and the method comprises the steps: introducing an international reference geomagnetic model, an international reference ionosphere model and an international reference atmosphere model when a waveguide parameter of a single-frequency signal segmented along a path is calculated through an LWPC model; the obtained geomagnetic parameters, the ionosphere electron density and the electron collision frequency contain influences of time and space, solar disturbance and geomagnetic changes, are used for simulation of the far-zone electromagnetic pulse waveform, and can improve the simulation precision of the far-zone electromagnetic pulse waveform.
Owner:NANCHANG UNIV +1

Anti-unmanned aerial vehicle defense system based on electromagnetic pulse and defense method thereof

The invention discloses an anti-unmanned aerial vehicle defense system based on electromagnetic pulses and a defense method thereof, and relates to the technical field of unmanned aerial vehicle defense. The position information, the signal characteristics and the thermal imaging information of the unmanned aerial vehicle are acquired and comprehensively evaluated, so that a three-dimensional threat evaluation system is constructed, multi-dimensional parameters are weighted and calculated into the threat evaluation index, the threat evaluation index is matched with the preset index set to determine the threat level, different threat scenes can be dynamically responded, and the threat evaluation accuracy is improved. The problem that in the prior art, the threat level cannot be automatically evaluated according to dynamic parameters such as the speed, the flight path and the load type of the unmanned aerial vehicle, and overreaction or defense vulnerabilities are likely to occur is solved.
Owner:XINJIANG LICHENG TECH CO LTD

Unmanned aerial vehicle detection and judgment method based on air-ground system and radio detection cooperation

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.
Owner:TIANMUSHAN LABORATORY

Low-voltage switch cabinet intelligent monitoring system and method based on Internet of Things

The invention discloses a low-voltage switch cabinet intelligent monitoring system and method based on the Internet of Things, particularly relates to the technical field of power equipment state monitoring, and is used for solving the problem of monitoring data distortion caused by accumulated damage of a sensor due to arc electromagnetic pulses in the prior art. A current and voltage waveform is collected and an arc event is identified; calculating an electromagnetic coupling weight coefficient according to the arc position and the sensor coordinate; capturing working parameters of the sensor, comparing the working parameters with historical reference values, and calculating offset of key parameters; information entropy mutation of the offset of the same type of sensor groups is analyzed, and a nonlinear damage mark is triggered; based on the offset and the damage mark, establishing a segmentation mapping relation and outputting an accumulated damage evaluation value; correcting monitoring data according to the evaluation value and inputting the monitoring data into a fault diagnosis model to execute early warning; quantitative evaluation and data self-correction of the hidden damage of the sensor are realized, and the accuracy of fault early warning is guaranteed from the source.
Owner:ZHEJIANG HAOWANG ELECTRIC CO LTD

Sensors incorporated into building materials to detect physical characteristic changes

A disclosed construction structure unit may include at least one split-ring resonator, which may be embedded within a material. The split ring resonator may be formed from a three-dimensional (3D) monolithic carbonaceous growth and may detect an electromagnetic ping emitted from a user device. The split ring resonator may generate an electromagnetic return signal in response to the electromagnetic ping. The electromagnetic return signal may indicate a state of the material in a position proximate to a respective split ring resonator. In some aspects, the split-ring resonator may resonate at a first frequency in response to the electromagnetic ping when the material is in a first state, and may resonate at a second frequency in response to the electromagnetic ping when the material is in a second state. A resonant frequency of the 3D monolithic carbonaceous growth may be based on physical characteristics of the material.
Owner:LYTEN INC

Method and apparatus for generating a quantum cryptographic key

There is presented an apparatus for generating a quantum cryptographic key by outputting an EM pulse / a set of EM pulses to a further apparatus. One or more electromagnetic pulse sources are for outputting at least a first set of one or more EM pulses and a second set of one or more EM pulses. A random phase relationship exists between a first EM pulse and a second EM pulse. An optical element (BS3) receives the first EM pulse and the second EM pulse and is configured to interfere the first EM pulse with the second EM pulse and output an interfered EM pulse along an output path. Further optical elements BS4 and BS5 are used to split off a portion of the output pulses for measuring the properties of the interfered EM pulses. In one example, at least one EM attenuator is configured to attenuate the said received EM pulse such that the attenuated EM pulse comprises an average of up to one photon. The attenuated pulse is output towards a further apparatus, for generating the quantum cryptographic key.
Owner:XEN QUANTUM LTD

Frequency and waveform agile microwave devices

Implementations of disclosed systems and methods are capable of changing the frequency or other waveform characteristics dynamically based on receiving feedback about the effect of an electromagnetic pulse radiation on a target electronic device. Various implementations can be configured to emit electromagnetic pulses at a single radio frequency or a plurality of radio frequencies. For example, the frequency of the carrier electromagnetic radiation in a single pulse can change during the pulse interval. As another example, a single electromagnetic pulse can comprise a frequency comb with two or more frequencies.
Owner:EPIRUS INC

Strong electromagnetic pulse injection test system and method for radio frequency component of unmanned aerial vehicle

The invention provides a strong electromagnetic pulse injection test system and method for a radio frequency component of an unmanned aerial vehicle, in the system, a pulse generation device generates a plurality of injection signals based on a strong electromagnetic pulse generation strategy and sends the injection signals to a signal monitoring device and a control device, and the signal monitoring device is used for sampling each injection signal and a reflection signal; the control device is used for generating a plurality of analog signals, coupling the analog signals and the injection signals to obtain a plurality of coupling signals, and transmitting the coupling signals to the control device. According to the coupling signals, the monitoring parameters of the injection signals corresponding to the coupling signals and the monitoring parameters of the reflection signals, at least one electromagnetic protection threshold value of the unmanned aerial vehicle is determined, and the analog signals are used for simulating actual working signals of the unmanned aerial vehicle. The injection signal parameters are flexible to regulate and control, the parameter coverage range is wide, the test result can be quantitatively evaluated, and the interference of the strong electromagnetic pulse on the unmanned aerial vehicle is visually reflected.
Owner:QIANYUAN NATIONAL LABORATORY

On-line monitoring method and system for strong electromagnetic pulse damage of radio frequency device

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.
Owner:CHINA SHIP DEV & DESIGN CENT

Laser cladding process for slender shaft parts and real-time monitoring method for width-depth ratio of molten pool

The invention relates to the technical field of surface treatment and modification, in particular to a laser cladding process for slender shaft parts and a real-time monitoring method for the width-depth ratio of a molten pool. Comprising the following process steps that S1, dynamic segmented cladding is conducted, the number N of segments is scientifically calculated, and a non-adjacent skip welding strategy is adopted to disperse thermal stress; s2, gradient cooling, quenching, speed-controlled cooling and natural air cooling are carried out, and residual stress and grain coarsening are inhibited; s3, electromagnetic pulse straightening is conducted, the magnetic field intensity B is calculated according to the deformation amount and material parameters, and micron-sized deformation is corrected in a non-contact mode; and S4, closed-loop control is conducted, the width-depth ratio W / D of the molten pool is monitored in real time based on multispectral imaging and a deep learning model, and the laser power P and the clamping force F are dynamically adjusted. By combining thermal conductivity and geometric parameter dynamic segmentation and fusing multispectral intelligent sensing and non-contact straightening technologies, the problems of thermal stress accumulation, uncontrollable deformation and large process fluctuation in slender shaft laser cladding are solved, and the method is suitable for the high-added-value fields such as aerospace and precision machine tools.
Owner:CHENGDU ZHENGXI INTELLIGENT EQUIPMENT GROUP CO LTD

Optimisation of control of reactive circuit for generating electromagnetic pulses

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.
Owner:OXFORD UNIVERSITY INNOVATION LTD

Three-dimensional surrounding imaging denoising method and system based on physical constraint optimization algorithm

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.
Owner:STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER CO

Directional ultra-short strong field electromagnetic pulse generation device

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.
Owner:INSTITUTE OF PHYSICS CHINESE ACADEMY OF SCIENCES

Signal wall box with strong electromagnetic pulse combination protection and high shielding effectiveness

The invention relates to a signal wall box with strong electromagnetic pulse combined protection and high shielding effectiveness, which belongs to the field of shielding square cabins of electronic equipment and comprises a shell, an out-cabin panel, an in-cabin panel and a filter. The peripheral shell wall of the shell penetrates through a cabin plate of the square cabin, and an outer cabin panel and an inner cabin panel are installed at the outer end and the inner end of the shell respectively. A plurality of connector sockets are arranged on the out-cabin panel and the in-cabin panel in a one-to-one correspondence mode, and a signal interface is formed by a group of corresponding connector sockets. The plurality of filters are installed in the shell, each signal interface corresponds to one corresponding filter, and the filters are connected in series in a signal loop of a group of connector sockets. The filter comprises a combined filter, a radio frequency protection filter and a short wave protection filter. The signal wall box has lightning protection, high-altitude nuclear explosion electromagnetic pulse protection and high shielding effectiveness at the same time, and provides reliable protection for a signal window of an electronic equipment shielding square cabin in a strong electromagnetic pulse environment.
Owner:XIAN CHANGFENG ELECTROMECHANICAL RES INST +1

Electronic component parameter optimization method and system

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.
Owner:SHENZHEN HENGTIAN ELECTRONICS CO LTD

Optical-parametric-amplification-enhanced spectroscopy and sensing

A device useful as a spectrometer or a sensor, comprising a source of a short electromagnetic pulses at a first wavelength and having a full width at half maximum in a range of 1 femtosecond-1 nanosecond; a sample holder in which the short pulses interact with the sample in the sample holder so as to form an output signal comprising a background residual of the short pulses and a sample response signal in the time domain, and an amplifier comprising nonlinear medium. The nonlinear medium comprises an input for receiving the output signal and a pump pulse at a second wavelength, and a second-order nonlinearity configured for a nonlinear process selectively amplifying the sample response signal, for example by temporally overlapping the pump pulse and the sample response signal.
Owner:CALIFORNIA INST OF TECH

A kind of box-type substation monitoring method and device, system, storage medium

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.
Owner:广蓝电气设备有限公司

EMP hardened enclosure

An enclosure to protect people and instruments from the effects of an electromagnetic pulse (EMP) is provided. The enclosure includes a floor assembly; walls extending upward on a first, second, third, and fourth side of the floor assembly; a roof; and a ceiling. On the interior of the enclosure, a shield layer is provided such that the enclosure forms a six-sided Faraday cage. Fasteners and other conductive securement materials such as copper tape help achieve the conductivity of the shield layer. Extending through the walls of the enclosure may be secure points of entry allowing for people, air, and conductors to securely enter and exit the enclosure. The enclosure contains a grounding system to assist with protecting the contents of the enclosure from the effects of the EMP.
Owner:TRACHTE LLC