654 results about "Electromagnetic pulse" patented technology

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.

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.

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.

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.

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.

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.

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 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.

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.

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.

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.

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.

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.

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.

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.

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.

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 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.

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.

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.

The invention relates to the technical field of electromagnetic pulse radiation simulation, in particular to a Split-type bounded wave electromagnetic pulse simulator and a design method and application thereof. The Split-type bounded wave electromagnetic pulse simulator comprises a pulse source, and a bounded wave simulation antenna and a load which are connected with the pulse source in sequence; the bounded wave simulation antenna is a plurality of metal wires which are connected in parallel, and comprises a simulator front cone section, a distributed load connecting piece and a Split type tail end bifurcated structure which are sequentially connected with a pulse source; and the load is connected to the tail end of the Split type tail end bifurcated structure. A parallel section of a traditional simulator is omitted, a tail end matched load adopts a Split type tail end bifurcated structure, high-frequency and low-frequency reflection of electromagnetic waves propagating in the simulator is effectively reduced, high-frequency response of the simulator is improved, the high-frequency upper limit of the simulator is improved, distortion of the tail end reflection to a working space electric field waveform trailing edge is basically eliminated, and the stability of the simulator is improved. The problems that in the prior art, a bounded wave electromagnetic pulse simulator is insufficient in high-frequency response and tail end reflection causes work space electric field waveform distortion and the like are solved.

A method, apparatus and device for monitoring the degradation of an electromagnetic pulse (EMP) protection apparatus. Operation data of at least two parameters of an EMP protection apparatus are monitored, and a curve is fitted on the basis of operation data, so as to obtain the degradation rate of each parameter, thereby avoiding the limitation of single parameter monitoring and improving the reliability; and then, a polynomial model of the parameters changing over time is constructed, and each coefficient of the polynomial model is solved by means of the operation data of the parameter having the fastest degradation rate, so as to obtain a degradation prediction model for the EMP protection apparatus, such that the degree of degradation of the EMP protection apparatus can be predicted on the basis of the degradation prediction model for the EMP protection apparatus. The method is simple and reliable, and solves the technical problem of existing methods for monitoring the degradation of an EMP protection apparatus having limitations and low reliability.

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.