82 results about "Point energy" patented technology

The invention belongs to the technical field of energy storage, and particularly relates to an equalization device for series battery packs. The device is used for equalization regulation and management between single energy-storage batteries and between battery packs. The device comprises at least one battery pack. The battery packs are connected in series to form the series battery packs. Each battery pack comprises at least two single batteries which are connected in series. The single battery comprises a battery and an equalization module. The two ends of the battery are connected in parallel with the equalization module. By the equalization device, point-to-point energy equalization between the battery packs and between the single batteries in each battery pack is realized, so that equalization speed is greatly increased, and equalization efficiency is greatly improved; and electrically isolated energy channels are formed between every two packs, so that a system can be adapted to many kinds of application from a low voltage grade to a high voltage grade, and has high universality, and a complex equalization strategy can be conveniently realized by a flexible hardware operating mode.

A processing information acquisition system in a processing machine which feeds a processing point energy or material, the processing information acquisition system provided with a position information acquisition unit which acquires position information of a feed unit of energy or material, a feed rate control unit which receives a feed condition command of energy or material, converts the feed condition command to a control command which controls a feed of energy or material, and uses the converted control command to control a feed rate of energy or material from the feed unit, a feed rate estimation unit which acquires the control command from the feed rate control unit and calculates an estimated feed rate of energy or material which is fed to a processing point based on the control command, and an output unit which outputs the position information which the position information acquisition unit acquired and the estimated feed rate which the feed rate estimation unit calculated when the feed unit is located at a position corresponding to the position information.

The invention discloses a vibration measuring method of engine speed by applying a four-point energy centrobaric correction method, which comprises the steps of: discrete-sampling a vibration acceleration signal on the surface of an engine block to obtain a time series; obtaining a frequency domain signal X1(f) through fast Fourier transformation of Zn(t); correcting the peak frequency fi of X1(f) by adopting a four-point energy centrobaric correction method, and obtaining a corrected frequency; obtaining a time spectrum signal ZZn(t) through carrying out self-related transformation and fast Fourier transformation on the frequency domain signal X1(f); correcting the time ti corresponding to the peak of ZZn(t) by adopting the four-point energy centrobaric correction method again, and obtaining the corrected time; and finding the accurate 1 / 2 harmonic frequency value of the rotating speed w of the four stroke engine according to the corrected frequency and time, and calculating the rotating speed w of the engine through a relational expression. The vibration measuring method of engine speed can solve the problem that the rotating speed of the engine cannot be detected when the number of engine blocks cannot be determined; and the method has the advantages of better universality, high noise-proof performance and accurate and reliable result.

An x-ray scanning system includes an x-ray source that produces a collimated fan beam of incident x-ray radiation. The system also includes a chopper wheel that can be irradiated by the collimated fan beam. The chopper wheel is oriented with a wheel plane containing the chopper wheel substantially non-perpendicular relative to a beam plane containing the collimated fan beam. In various embodiments, a disk chopper wheel's effective thickness is increased, allowing x-ray scanning with end point energies of hundreds of keV using relatively thinner, lighter, and less costly chopper wheel disks. Backscatter detectors can be mounted to an exterior surface of a vehicle housing the x-ray source, and slits in the disk chopper wheel can be tapered for more uniform target irradiation.

The invention discloses a meshing frequency and spectrum correction technology based wind power gear box order tracking method. The meshing frequency and spectrum correction technology based wind power gear box order tracking method comprises performing discrete sampling on vibration acceleration signals on the surface of a box body of a fan planet gear box to obtain a non-stationary time domain sequence xn (t); adding a hanning window w (t) to intercept a section of xn (t) and performing FFT (Fast Fourier Transformation) to obtain a power spectrum G (f); performing frequency correction on the meshing frequency fm of a gear box high-speed shaft in the G (f) by a four-point energy centrobaric correction method to obtain an instantaneous meshing frequency which is expressed by the formula; moving window functions in turn and extracting the formula by the energy centrobaric method repeatedly to obtain a meshing frequency curve which is expressed by the formula; obtaining a high-speed shaft rotating frequency curve according to the relation between the meshing frequency and the rotating frequency, wherein the high-speed shaft rotating frequency curve is expressed by the formula; combining with the formula to performing equal-angle resampling on the xn (t) to obtain a smooth angle domain sequence theta n (t); performing correction on the order time and the amplitude by a window length moving method and the energy centrobaric method to obtain an order tracking curves Oi (t). The meshing frequency and spectrum correction technology based wind power gear box order tracking method is good in generality, high in anti-noise performance and accurate and reliable and the problems that a method for measuring the fan rotating speed through a tachometer is difficult in installation, high in cost, poor in accuracy and the like can be avoided.

Methods and systems are provided for calibrating a nuclear medicine imaging system. In one embodiment, a method comprises: detecting, with a plurality of detectors, photons emitted by a calibration source comprising a radioactive line source and a fluorescence source, while pivoting one or more detectors of the plurality of detectors; and calibrating, with a processor communicatively coupled to the plurality of detectors, each detector of the plurality of detectors based on energy measurements of the detected photons. In this way, a two-point energy calibration of detectors can be performed with a single isotope, and without removing or adjusting a collimator attached to the detector.

The method of this invention, and any apparatus which implements it, improves the accuracy of determining the sub-pixel location of the image of a point-like radiator of energy (typically light). This method distributes the image of a point radiator of energy over detector pixels such that the number of image pixels with high intensity gradients is maximized, while it minimizes the energy wasted on pixels with low intensity gradients, which contribute little to the computation of the sub-pixel location of the image. By improving such accuracy in each of one or more cameras, the accuracy of deriving the spatial location of the energy radiator improves also.

The invention relates to an instrument stellar magnitude estimation method for a star sensor. The method comprises the following steps of S1, preprocessing a real star point spot image; S2, performingdimension reduction filtering on the star point spot image, and extracting image characteristics of the star point spot image by utilizing Kalman filtering; S3, according to the characteristics of the star sensor, calculating the total number of photoelectrons generated by incidence of a star point; S4, traversing parameters according to a skewed normal distribution model of a star point spot, and establishing a relation database between the parameters and the image characteristics; and S5, based on the image characteristics obtained in the step S2, searching for the parameter with an optimalmatching error in the relation database obtained in the step S4, building the skewed normal distribution model, and performing simulation to obtain the star point spot image. The Kalman filtering isused for parameter estimation of a star point imaging model; a star point energy distribution model is optimized; the instrument stellar magnitude of the star sensor can be iteratively estimated in real time; the asymmetry of the star point spot is characterized; and the real-time performance and the accuracy of estimation are ensured.

The invention provides an illumination test apparatus and a test method for illumination uniformity and stray light. A special detecting light path is added for realizing energy detection, and the problem of an insufficient sampling frequency in an image plane space is solved; a high-precision measurement for the illumination uniformity and stray light in small fields of view can be realized at the same time; compared with the conventional test method carried out by driving a point energy sensor through a motion table, the test method provided by the invention makes the test time shorter; and the stray light can be monitored in real time without requiring to load a mask.

The invention discloses a broadband radar target adaptive fusion detection method based on a skew-symmetry structure, belonging to the field of radar signal processing. Aiming at a broadband radar system for which auxiliary data is missing and a space symmetric linear array or a fixed coherent pulse recurrence interval is used, clutter background statistical characteristics are estimated through clutter covariance matrix skew-symmetry structured information in main data and the auxiliary data, target scattering point energy in all to-be-detected distance units is fused based on a one-step process generalized likelihood ratio detection criterion, the clutter information in the main data and the auxiliary data is used maximally, a broadband target skew-symmetry structured adaptive detector is designed, false alarm probability and detection probability analytical expression of the detector are derived, mathematical tool support is provided for detector threshold value setting and detection performance theoretical analysis, range spread target adaptive detection performance under an environment where the auxiliary data is missing is improved, and the method has a popularization and application value.

The invention discloses a vibration energy collector. The collector comprises a piezoelectric cantilever beam and a mass block. The piezoelectric cantilever beam comprises a main beam which is transversely arranged, a plurality of first auxiliary beams which are vertically arranged and a plurality of second auxiliary beams which are vertically arranged. One end of the main beam is a fixed end. The other end of the main beam is a free end. The mass block is fixed to the free end of the main beam. The plurality of first auxiliary beams are arranged with intervals and are fixed to one side of the main beam. The plurality of second auxiliary beams are arranged with intervals and are fixed to the other side of the main beam. By using the vibration energy collector, the main beam of the piezoelectric cantilever beam is provided with the plurality of first auxiliary beams and the plurality of second auxiliary beams; each auxiliary beam possesses a respective resonant frequency and resonant frequency points of the vibration energy collector are increased; and when each auxiliary beam generates vibration, voltage attenuation of two sides of each resonant frequency point is slow so that a bandwidth is increased. Simultaneously, through the auxiliary beams, an electricity production area is correspondingly increased, output electric energy is improved and a problem that a frequency point energy density is low is solved.

The invention provides a flow coefficient 0.0242 pipeline compressor model grade which comprises an impeller, a vaneless diffuser, a curve and a return channel, wherein the impeller is positioned in the inlet of the model grade; the vaneless diffuser is arranged at the outlet of the impeller; the return channel is positioned at the outlet of the model grade; the vaneless diffuser is communicated with the return channel via the curve; the machine mach number of the model grade is Mu2=0.35 to 0.65; the design point flow coefficient of the model grade is Phi1=0.0242; the design point energy head coefficient of the model grade is tau=0.585; the polytropic efficiency of different mach numbers under design flow coefficient working conditions is eta pcl=0.819 to 0.825; the flow range of an application is 60 to 150% that of design points. The invention further provides a method for designing a model grade impeller. The model grade provided by the invention is high in efficiency, high in energy head coefficient, large in hub ratio and small in span; by adopting the model grade, a light medium compressor can be relatively high in operation efficiency and relatively wide in working condition range, meanwhile the working rotation speed of a rotor can be reduced, the span of a bearing can be reduced, and the stability of the rotor can be improved.

The invention provides a method for measuring stray light. The method comprises the following steps of: S1, initializing a displacement platform; S2, setting measuring parameters of a measuring system; S3, driving the displacement platform by a driving motor to scan an illumination light field region, performing light energy detection on a test point on a mask surface or a silicon slice surface by using a point energy detector, fixing the point energy detector at the position of a test point, adjusting the size of an opening of a changeable slit to obtain light energy values of the same test point at different openings of the variable slit; S4, for different test points in the illumination light field region, repeating the step S3 to measure different light energy values at different openings of the variable slit; and S5, storing light energy value data into a computer through a serial port communication, and performing data processing on the light energy value data by the computer to obtain the stray light of each test point on the mask surface or the silicon slice surface. The invention also provides a system for measuring the stray light.

The invention discloses a method for quickly extracting star points from star images. The method includes: according to a clustering concept, adopting part of star point pixels for coarse positioning of star points so as to realize rough estimation on center coordinates of star point dispersion regions; taking the center coordinates of the star point dispersion regions as seed points to automatically screen star point pixels according to a seed point area region growing method; according to characteristics of star point energy distribution, correcting gray values of the star point pixels; adopting a centroid calculation formula for precision positioning of the star points. Since star point extraction operations are centered in local ranges of the star point dispersion regions by means of coarse positioning of the star points, start point extraction speed can be increased; correction of the gray values of the start point pixels is simple and feasible, and image filtering effects can be achieved while more algorithm time and cost are saved as compared with those of image filtering.

The invention discloses a jumping start point energy management method for salutatory reentry of a lunar spacecraft. The method includes firstly, reentering by a maximum heeling angle to facilitate capture of the lunar spacecraft; secondly, controlling energy dissipation ratio and energy dissipation quantity of the lunar spacecraft, estimating an energy value at a jumping start point in real time according to an online parameter identification result, and determining a quit opportunity of an energy management section; finally, flying according to a preset literal heeling angle to enable the spacecraft to jump at a preset energy valve. By the method, precision management on energy at the jumping start point can be realized, so that the probability atmosphere capture of the lunar spacecraft is improved, and proper energy is reserved for follow-up voyages.

The embodiment of the invention discloses a method and a system for analyzing mineral composition of dense sandstone. The method comprises the following steps: acquiring a mineral sample; pretreating the mineral sample; performing point-by-point energy spectrum analysis on the pretreated mineral sample by using a scanning electron microscope to obtain a scanning electron microscope gray image and a corresponding energy spectrum data volume, comparing the energy spectrum data volume with a standard mineral database, and determining mineral plane distribution characteristics of the gray image; performing micron CT scanning on the pretreated mineral sample, and acquiring a gray slice of a scanning result; comparing gray image with the gray slice, determining the gray image and a matching image in the gray slice, and according to the matching image and the gray image, determining a corresponding relation between a mineral in the gray slice and a gray value; and according to the corresponding relation, establishing a three-dimensional spatial distribution model of the mineral, and determining occurrence and spatial distribution characteristics of the mineral. Through the method and the system for analyzing the mineral composition of the dense sandstone, provided by the invention, accuracy and intuition of mineral composition analysis can be improved.

The invention provides a shock sound detection device and a shock sound detection method. The impact sound detection device includes: a unit configured to obtain an audio input; a unit configured to extract at least one feature from the obtained audio, and based on the extracted feature, divide the obtained audio into at least one audio segment; A unit configured to identify a first impact sound from an audio segment based on a pre-generated sound model and extracted features; configured to detect a start point of the audio segment within at least a portion of the audio segment, and output a location and a start point of the start point an element of the energy-related characteristics of the onset; at least two types of elements configured to determine the onset based on the pre-generated onset model and the energy-related characteristics of the onset; and configured to determine the onset based on the identified impact sound and the determined onset The type of , which determines the unit of the second impact sound from the audio segment. According to the present invention, impact sound detection performance can be improved by using the information of the starting point.

The embodiment of the invention discloses an energy and signal co-transmission system based on an optical fiber, namely an energy and signal co-transmission system based on the optical fiber, which comprises a pumping energy device for providing an energy optical signal; a first signal transceiving device which is used for transmitting and / or receiving a communication optical signal for communication; a single-mode optical fiber which is used for transmitting the energy optical signal and the communication optical signal; a photoelectric conversion device which is used for converting the energy optical signal into an electric signal; and an energy storage device which is used for storing the electric signals obtained through conversion of the photoelectric conversion device. The scheme hasthe advantages of simple laying, low cost, safe and reliable data transmission, end point energy self-supply, strong anti-electromagnetic interference capability in energy transmission and the like.

The invention relates to an apparatus for measuring resonant frequency of an acoustic surface wave device by adopting wide-band excitation. According to the measuring apparatus, broadband modulating signals are generated through an FPGA, and radio-frequency signals are generated by the broadband modulating signals and local oscillation signals of a local oscillator through frequency mixing of a frequency mixer; the radio-frequency signals are emitted out through an antenna after being amplified through a power amplifier, and the acoustic surface wave device absorbs the signals with frequency close to the resonant frequency of the acoustic surface wave device, then reflects the signals to the antenna and transmits the signals to a signal receiving unit; the signal receiving unit outputs intermediate frequency signals and RSSI signals through a receiver, an A / D processor performs sampling on the intermediate frequency signals and the RSSI signals, a signal processing unit compares the RSSI signals with a signal intensity designated value, and if the RSSI signals are larger than the designated value, the signal processing unit performs FFT conversion processing on the intermediate frequency signals to calculate the resonant frequency of the acoustic surface wave device. The measuring apparatus can emit the radio-frequency signals with multiple frequency point energy at the same time, so that resonant frequency measurement of the acoustic surface wave device is finished within a transmitting-receiving period, and the measuring speed is high.

The invention relates to a wireless charging system and a charging method based on an electromagnetic wave. The wireless charging system based on the electromagnetic wave comprises a transmitting device and a receiving device arranged on an electronic device. The transmitting device comprises a signal generating module, a transmitting antenna, a first monitoring module and a position monitoring module. The signal generation module is connected with an external power supply. The first monitoring module is used for acquiring and judging the working parameters of the external power supply, the signal generation module and the transmitting antenna. The position monitoring module monitors the position parameters and the working parameters of the transmitting antenna. The receiving device comprises a receiving antenna, a conversion unit and a second monitoring module. The second monitoring module obtains the position parameter of the receiving antenna and feeds back to the position monitoring module, and is used for obtaining and judging the working parameter of the analysis conversion unit to feed back to the external power supply, so that the external power supply adjusts the working parameter. The wireless charging system based on electromagnetic wave can realize point-to-point energy transmission and improve charging efficiency.

The invention discloses a web searching method and terminal, belonging to the field of a global system for mobile communications (GSM). The web searching method comprises the following steps of: measuring each frequency point to obtain frequency point energy; performing cell synchronization on corresponding cells of the frequency points in a sequence from large frequency point energy to small frequency point energy; after performing cell synchronization on each cell, judging whether the time difference between a first time point and a second time point is greater than or equal to the cell synchronization required time, wherein the first time point is the synchronization finish time of the latest cell on which cell synchronization is performed, and the second time point is the soonest time when the system message scheduling cycle of all the cells in a synchronized state arrives; if the time difference between the first time point and the second time point is greater than or equal to the cell synchronization required time, performing cell synchronization on the cell corresponding to the next frequently point; and if the time difference between the first time point and the second time point is less than the cell synchronization required time, waiting till the second time point and reading the system message when the second time point arrives. According to the web searching method disclosed by the invention, the synchronization tasks of other frequency points are performed in advance during the idle time after the synchronization is finished before the system message is read, thus increasing the web searching speed.

The invention provides a model stage of a pipeline compressor having a flow coefficient of 0.02. The model stage comprises an impeller, a vaneless diffuser, a curve passage and a reflowing machine, wherein the impeller is positioned at the inlet position of the model stage; the vaneless diffuser is arranged at the outlet of the impeller; the reflowing machine is positioned at the outlet position of the model stage; the vaneless diffuser communicates with the reflowing machine through the curve passage; the machine mach number Mu2 of the model stage is equal to 0.35 to 0.65, the design point flow coefficient Phi1 is equal to 0.02, the design point energy head coefficient Tau is equal to 0.53, the polytropic efficiency Etapcl at the design flow coefficient working condition under each mach number is equal to 0.82 to 0.85, and the applied flow range is 60% to 150% of a design point. The invention also provides a design method of the impeller of the model stage. The model stage provided by the invention is high in efficiency, high in energy head coefficient, large in hub ratio and small in span; by adopting the model stage, a light-medium compressor can have relatively high running efficiency and relatively wide working condition range, and meanwhile, the working rotating speed of a rotor can be reduced, the span of a bearing can be shortened, and the stability of the rotor can be improved.

The invention provides a model level of a pipeline compressor with the discharge coefficient being 0.0322. The model level of the pipeline compressor with the discharge coefficient being 0.0322 comprises an impeller, a vaneless diffuser, a bend and a return channel. The impeller is located at the position of an inlet of the model level. The vaneless diffuser is arranged at an outlet of the impeller. The return channel is located at the position of an outlet of the model level. The vaneless diffuser and the return channel communicate with each other through the bend. The machine mach number Mu2 is 0.35-0.65, the design point discharge coefficient phi1 is 0.0322, the design point energy head coefficient tau is 0.614, the polytropic efficiency Etapcl under the design discharge coefficient working conditions at various mach numbers is 0.846-0.851, and the application discharge range is 60%-150% that of the design point. The invention further provides a design method of the impeller of the model level. The model level of the pipeline compressor with the discharge coefficient being 0.0322 is high in efficiency, high in energy head coefficient, large in hub ratio and small in span, by the adoption of the model level of the pipeline compressor with the discharge coefficient, a light medium compressor can have high operation efficiency and wide working condition range; and meanwhile, the work rotation speed of a rotor can be reduced, the space of a bearing is reduced, and the stability of the rotor is improved.

The invention discloses a single-shaft CO2 compressor final-section model stage with a flow coefficient of 0.0086 and an impeller design method, and mainly aims to improve the efficiency of a CO2 compressor set, to reduce the power consumption of the CO2 compressor set, to guarantee wider working condition range of compressors and to improve stability of rotors. The model stage comprises an impeller, a blade diffuser, a curve and a reflux machine, wherein the impeller is a low-friction wedged impeller designed according to specific blade thickness reference rules, and is positioned in an inletposition of the model stage; the blade diffuser is arranged in an outlet of the impeller; the reflux machine is positioned in an outlet position of the model stage; the blade diffuser and the refluxmachine communicate through the curve; the machine mach number Mu2 of the model stage is 0.6-0.9; the flow coefficient phi 1 is 0.0086; the design point energy head coefficient t is 0.62; each mach number lower polytropic efficiency npol is 0.68-0.685; and the applied flow range is 73-139% of the design point.

Methods and systems are provided for calibrating a nuclear medicine imaging system. In one embodiment, a method comprises: detecting, with a plurality of detectors, photons emitted by a calibration source comprising a radioactive line source and a fluorescence source, while pivoting one or more detectors of the plurality of detectors; and calibrating, with a processor communicatively coupled to the plurality of detectors, each detector of the plurality of detectors based on energy measurements of the detected photons. In this way, a two-point energy calibration of detectors can be performed with a single isotope, and without removing or adjusting a collimator attached to the detector.

The invention discloses an active imaging type star sensor and a control method thereof. The star sensor comprises a front group of optical lenses, a DMD (digital micro-mirror device) chip, a DMD driving control unit, a rear group of optical lenses, a detector, a data acquisition unit and a star point data processing system; the front group of the optical lenses enables a micro-mirror on the DMD chip to reflect star light in a first working state, and controls the micro-mirror in a star point area to work in the first working state according to the working state of the micro-mirror; the rear group of the optical lenses converges the star light energy which is reflected by the micro-mirror on the DMD chip to the detector; the detector detects star point energy which is reflected by the micro-mirror on a detected DMD chip in the first working state; the data acquisition unit acquires an electric signal, and performs A / D conversion on the electric signal; the star point data processing system is used for generating a star map random template. According to the star sensor, the DMD chip can be applied to the star sensor so as to improve the dynamic performance of the star sensor, improve the updating rate, and effectively improve the precision of the star sensor.

The invention discloses a double resonance oscillation circular polarization and short back reflection C waveband antenna. The double resonance oscillation circular polarization and short back reflection C waveband antenna uses a multifunctional spurious coupling array mode, and is characterized in that a reflection cavity is of a cylindrical structure with one end sealed, an antenna substrate is located at the bottom of the interior of the reflection cavity, an antenna array of a square corner cut shape is etched at the center of the antenna substrate, a plurality of spurious array pieces are evenly distributed along the circumference of the antenna array, the reflection cavity achieves an antenna pointing energy convergence radiation function, the spurious array pieces achieve electromagnetic coupling, fixation support and antenna substrate positioning functions, a reflection plate is fixedly connected with an open end of the reflection cavity, a round reflector piece is pasted at the center of the reflection plate, the reflection plate is parallel and opposite to the antenna array, a radio frequency connection piece is located at the center of the outer end of the reflection cavity, one end of the radio frequency connection piece is fixedly connected with a cable, and the other end of the radio frequency connection piece passes through the reflection cavity and is connected with the antenna array. The double resonance oscillation circular polarization and short back reflection C waveband antenna is simple in structure, has the advantages of being wide in main lobe, low in side lobe, portable and small, and is suitable for satellite communications, navigation communications and ground anti-interference communications.

The invention discloses a single-shaft CO2 compressor tail section model stage with the flow coefficient being 0.0056 and an impeller design method and mainly aims to improve the efficiency of a CO2 compressor unit, reduce power consumption of the CO2 compressor unit, ensure the effect that a compressor is wide in working condition range and improve the stability of a rotor at the same time. The model stage comprises an impeller, a blade diffuser, a bend and a return device, wherein the impeller is a low-friction-resistance wedge-shaped impeller designed according to specific blade thickness reference; the impeller is located at an inlet of the model stage; the impeller diffuser is arranged at an outlet of the impeller; the return device is located at an outlet of the model stage; the blade diffuser communicates with the return device through the bend; and the machine Mach number Mu2 of the model stage ranges from 0.6 to 0.9, the flow coefficient phi1 is equal to 0.0056, the design point energy head coefficient Tau is equal to 0.61, the polytropic efficiency Etapo1 of all Mach numbers ranges from 0.64 to 0.645, and the application flow range is 75%-146% of design points.

The invention discloses an earth ground electromagnetic pulse response identification method and system based on a broadband LFM excitation source. By using the broadband LFM excitation source, the current waveform of an emitted broadband chirp signal and the response voltage of an earth in the broadband chirp signal, then by using an established earth ground electromagnetic pulse response identification model, a convolution inverse operator is determined according to the current waveform and earth ground electromagnetic pulse response is calculated according to the response voltage of a corresponding time, and the fine identification of earth ground electromagnetic pulse response is realized. The broadband chirp signal employed by the invention has the characteristics of wide frequency band, large spectrum density, uniform frequency point energy and an excellent inverse operator characteristic, the random noise and rule noise are effectively suppressed in a identification process, thus the identification precision of the earth ground electromagnetic pulse response is substantially improved, and the signal to noise ratio of detection is improved.