61 results about "Induced polarization" patented technology

The invention discloses a complex medium controllable source electromagnetic multi-parameter three-dimensional inversion method and system, and the method comprises the steps: carrying out the three-dimensional space discretization of an exploration region, and carrying out the multi-time iteration inversion of a discrete exploration region through initializing a multi-parameter geologic model based on a multi-parameter inversion target function, and obtaining a multi-parameter three-dimensional inversion result; wherein the multi-parameter inversion objective function comprises a data fitting constraint, a model constraint and a cross gradient constraint, and the multi-parameter model comprises resistivity, magnetic conductivity, a charging rate, a frequency correlation coefficient and a time constant; and a hexahedral mesh discrete calculation region is adopted in inversion, and a finite element linear equation set is obtained through a vector finite element method, so that multi-parameter three-dimensional forward modeling calculation is realized. According to the method, the induced polarization effect and the magnetic conductivity influence are considered at the same time, multi-parameter three-dimensional inversion is achieved, the application precision and reliability of the controllable source electromagnetic method under the complex geological condition are remarkably improved, and rich geophysical basis is provided.

The invention relates to the technical field of pollution detection, in particular to a pollution assessment method, system, equipment and medium for a refuse landfill, and the method comprises the following steps: firstly, obtaining full-spectrum induced polarization data of the landfill to construct a stratum electrochemical attribute model; resolving a retardation factor distribution field by using the physical and chemical parameters of the pollution carrier and the model; constructing a Darcy velocity field in combination with hydrogeological parameters, and generating a pollution carrier migration velocity field through retardation factor correction; and finally, streamline tracing simulation is executed based on the velocity field, so that a target monitoring well coordinate and a risk early warning level are output. The technical problems that the dominant flow channel of the structural fracture is difficult to identify under the complex geology and evaluation distortion is caused by non-synchronous migration caused by the interface electrochemical action of the micro-nano carrier in the traditional method are solved; accurate positioning of the hidden leakage channel and accurate prediction of the penetration time are achieved, and the early warning capacity and the management and control efficiency of landfill environment risks are remarkably improved.

The invention discloses a stratigraphic water content layering inversion method based on a shallow seismic full waveform, and relates to the technical field of geophysical exploration data processing, and the method comprises the following steps: 1, under the same survey line condition, synchronously obtaining a seismic wave full waveform, complex impedance and an induced polarization frequency spectrum; 2, constructing a layered initial model containing a layer boundary line and an in-layer water content initial value; based on the layered initial model, executing dual-domain quantile alignment interface keeping iteration until convergence, and obtaining a final layer boundary line and an in-layer water content field; the double-domain quantile alignment interface maintaining iteration comprises the following steps: updating an in-layer moisture content field and a layer boundary line according to a seismic wave full waveform; and performing total variation regularization processing on the updated in-layer water content field to maintain the transition characteristic of the layer boundary line. According to the method, an efficient and reliable solution with actual guidance value is provided for mineral resource exploration, geological structure detection, groundwater survey and engineering geology evaluation.

The invention belongs to the related technical field of pipe network leakage detection, and provides a comprehensive detection method and system for leakage of an underground sewage pipe network in an industrial park in order to solve the problems that existing pipe network leakage detection is inaccurate, large-area detection is difficult and the like. Performing inversion on the acquired data by adopting prior constraint, and judging a detection section of suspected leakage abnormity according to a resistivity profile; further detecting the detection section with the suspected leakage abnormity by using a high-density resistivity method and an induced polarization method, refining a grid based on an electromagnetic method result and prior information, introducing directional smooth constraint and minimum gradient support to perform inversion constraint on acquired data, and positioning a leakage area; sampling to judge the authenticity of the leakage of the detected area, and peeping, measuring and positioning the leakage area through the pipeline robot; and rapid identification and delineation of the pipe network leakage risk area of the industrial park are realized through cooperation of multiple methods.

This invention belongs to the field of geographic exploration technology, specifically relating to a method and system for metal ore exploration based on multi-frequency phase induced polarization and radial gradient. The proposed solution creatively integrates broadband multi-frequency phase measurement with borehole radial vector gradient measurement, constructing an integrated joint inversion interpretation framework. This effectively overcomes the industry's technical bottlenecks, such as the difficulty of distinguishing mineralized bodies from water-bearing structures and the insufficient ability to characterize the spatial occurrence of target bodies in traditional borehole induced polarization methods. Specifically, the proposed solution can simultaneously achieve accurate identification of underground polarization body types and fine imaging of their three-dimensional spatial morphology, significantly reducing the ambiguity of exploration interpretation. It provides a high-precision and high-efficiency technical means for locating and delineating deep, concealed metal ore bodies, strongly supporting the precise exploration of mineral resources.

The invention relates to the technical field of rare earth resource exploration, in particular to an ion adsorption type rare earth content determination method, system, equipment and medium, and the method comprises the following steps: constructing a quantitative relation prediction model between normalized charge rate and total rare earth oxide mass fraction, arranging an impedance measurement system in a research area, and collecting impedance amplitude and phase; and obtaining a normalized charge rate based on the impedance amplitude and the phase, constructing a quantitative relation prediction model between the normalized charge rate and the total rare earth oxide mass fraction, and calculating to obtain the total rare earth oxide mass fraction based on the quantitative relation prediction model. According to the method, the surface electrical influence of the ion adsorption type rare earth ore sample is considered, the correlation between the spectrum induced polarization response and the chemical parameters is established, and the content of the rare earth oxide in the ion adsorption type rare earth sample is estimated by using the correlation.

This invention, in the field of geophysical electromagnetic exploration technology, discloses a system and method for evaluating the grouting effect at the working face based on the charge-induced polarization method. A power supply device and a receiving device are deployed around the grouting drill rod at the working face. The power supply device includes power supply electrodes that directly charge the water body. The receiving device includes multiple non-polarized electrodes uniformly distributed on the working face. The method includes: after the power supply current stabilizes, injecting a high-conductivity, high-polarization solution into the water body in front of the working face, and during the injection of grout into the water body in front of the working face, acquiring the electric field components received by the multiple non-polarized electrodes. For the data received at the same time, the distribution data of electrical parameters at the working face are calculated to determine the changes in the distribution of the water body in front of the working face, and to infer the grout migration and solidification process. By setting up power supply electrodes directly connected to the water body in front of the working face, observation data can be acquired in real time before and during grouting, realizing dynamic monitoring of the grouting effect during the grouting process.

The invention provides an induced polarization detection electromagnetic induction coupling elimination method and device based on double-source excitation, and aims to solve the problem that weak induced polarization signals of a deep target are submerged by noise and cannot be effectively identified in deep detection application of a double-frequency induced polarization method. Transmitting a low-frequency square wave signal to the underground through the other transmitter; the receiver receives a high-frequency time-domain waveform and a low-frequency time-domain waveform containing electromagnetic induction coupling; and performing frequency division convolution decoupling processing on the high-frequency time-domain waveform and the low-frequency time-domain waveform to obtain high-frequency signal amplitude and low-frequency signal amplitude after electromagnetic induction coupling is eliminated, thereby improving the deep induced polarization anomaly identification capability.

The application discloses a coal water-structure state recognition method based on terahertz spectroscopy, and relates to the technical field of material property characterization. The method prepares a characteristic state coal sample containing raw coal, collects a terahertz frequency band transmission spectrum and constructs a difference spectrum; three typical mechanism spectra of water-induced polarization absorption, structure scattering enhancement and cavity polarization nonlinearity are extracted through non-negative matrix decomposition to construct a frequency spectrum-mechanism-structure mapping model; the spectrum of a coal sample to be measured is collected and a difference spectrum is constructed, and after solving an activation weight vector, the difference spectrum is matched with characteristic samples to inverse the water-structure state thereof. The method can realize nondestructive and accurate recognition of the water-structure state of coal, adapt to disaster precursor warning such as water inrush in coal mines, and expand the engineering practical value of terahertz technology.

The application discloses a kind of induction logging instrument systems and acquisition method based on plasma optical fiber sensor, including ground current emission source and at least one well in current emission source and well in receiving acquisition device, the well in receiving acquisition device is connected with the optical system of induction signal detection being arranged on ground, the optical system is composed of sequentially connected broadband light source, polarizer, polarization controller, fiber optic circulator and spectrum analyzer, the fiber optic circulator is connected with well in receiving acquisition device and spectrum analyzer respectively, at least two plasma resonance optical fiber sensing probes are arranged in the well in receiving acquisition device. There is no mutual interference or crosstalk between plasma resonance optical fiber sensor, optical fiber sensor and emission power supply and antenna, and it is not easy to be disturbed by environmental electromagnetic noise, and multi-channel large data high-speed real-time transmission can be realized by using armored photoelectric composite cable connected with each well in receiving acquisition device.

The application discloses a polarization anomaly information extraction method based on resistivity inversion results, and comprises the following steps: introducing a Cole-Cole model into controllable source one-dimensional forward calculation, and deriving one-dimensional frequency domain forward calculation formula containing induced polarization effect; simulating frequency domain electromagnetic field response under the condition of layered induced polarization medium, and analyzing the influence of induced polarization parameters in the Cole-Cole model on the electromagnetic field response; adopting a step-by-step processing strategy to carry out inversion processing on the electrical property parameters of the measured electromagnetic field data, so as to obtain geoelectric section resistivity data; and adopting mapping imaging and sensitive optimal layer recursive imaging to extract the geoelectric section resistivity data, so as to obtain induced polarization anomaly information contained in the electromagnetic field response. Through the above scheme, the application has the advantages of simple logic, accuracy and reliability, and has high practical value and popularization value in the field of geophysical exploration technology.

The application discloses a rock anisotropy frequency spectrum complex resistivity acquisition method and system. First, the rock pore characteristics are acquired, and effective characterization of rock anisotropy frequency spectrum induced polarization is realized based on the rock pore characteristics, so that the correlation between the micro-pore structure and the meso-complex resistivity anisotropy characteristics is constructed, and the technical problem that it is difficult to realize scale-up frequency spectrum induced polarization characterization based on pore characteristics in the prior art is effectively solved, thereby providing more direct and reliable technical support for unconventional reservoir physical property interpretation.

The invention provides an anti-interference cross-hole induced polarization observation system and method, and relates to the technical field of cross-hole induced polarization, and the method comprises the steps: enabling a transmitter and a multi-pole full-waveform receiver to be disposed on the ground, and enabling a transmitting electrode to be disposed in a transmitting well; an electrode string is placed in the measuring well, the electrode string comprises a plurality of electrode terminals which are longitudinally arranged according to a preset distance array, and each electrode terminal is connected with a multi-pole full-waveform receiver; a multi-pole full-waveform receiver is adopted to simultaneously acquire multiple groups of full-waveform measurement data of multiple electrode terminals in the electrode string; target parameters are calculated according to the multiple sets of full-waveform measurement data of the multiple electrode terminals; according to the invention, the observation efficiency of cross-hole induced polarization can be improved, the measurement error is reduced, and the observation accuracy is improved.

The present application relates to rare earth resources exploration technical field, specifically to a kind of ion adsorption type rare earth content determination method, system, equipment and medium, the method by constructing the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction, impedance measurement system is arranged in study area, impedance amplitude and phase are collected, normalized charge rate is obtained based on impedance amplitude and phase, the quantitative relationship prediction model between the normalized charge rate and total rare earth oxide mass fraction is constructed, and total rare earth oxide mass fraction is calculated based on quantitative relationship prediction model.The present application method considers the surface electrical property influence of ion adsorption type rare earth ore sample, establishes the correlation between frequency spectrum induced polarization response and chemical parameter, and estimates the rare earth oxide content in ion adsorption type rare earth sample using it.

The application discloses a kind of monitoring system and method for safety of induced electric high voltage launch, it is related to geophysical exploration instrument technical field, the system includes: data acquisition module, DC relay, control module and monitoring end;Data acquisition module, DC relay and monitoring end are connected with control module;Data acquisition module is used to calculate the ground resistance in the induced electric launch loop of target induced electric transmitter in real time, and the ground resistance of real-time calculation is sent to control module;Control module is used to send the ground resistance received in real time to monitoring end, and when ground resistance is greater than set resistance threshold, the DC bus voltage of target induced electric transmitter is disconnected by controlling DC relay, and open-circuit fault information is sent to monitoring end by wireless communication.The application realizes the real-time safety monitoring of high induced electric transmitter, and improves production safety.

The invention provides a photo-thermal coupling self-powered system, and the system comprises a substrate which is used for bearing a whole device structure; the light-heat cooperation unit is arranged on the substrate and generates surface charges under illumination and temperature changes; a friction material for generating an electric charge; the electrodes are arranged at the two ends of the triboelectric material pair and are used for collecting charges; the rectification energy storage circuit is connected with the electrodes and used for rectifying, storing or outputting the collected charges outwards; the light-heat cooperation unit can be used as a triboelectric material or a functional layer, charge transfer coupling is carried out through light-induced polarization and pyroelectric effects under illumination and temperature changes, and coupling collection is carried out on multi-mode energy of light energy, heat energy and mechanical energy. According to the application, the photosensitive-thermal cooperation unit is introduced, illumination and temperature change are converted into surface charge quantity, and the problems that traditional TENG can only depend on single mechanical excitation and the energy source is limited are solved.

This invention relates to the field of lead-zinc ore detection equipment, and more particularly to an induced polarization (IP) sounding device for detecting lead-zinc ore. The technical solution includes: a base composed of a vertical base plate and a horizontal base plate that can be rotated and folded together; a clamping and insertion mechanism for clamping electrodes and inserting them into the ground; an electrode spacing adjustment mechanism connected to the vertical base plate and the clamping and insertion mechanism for adjusting the distance between the clamping and insertion mechanisms; and a graduated scale connected to the vertical base plate for indicating the displacement values ​​of the clamping and insertion mechanisms. This invention utilizes the clamping and insertion mechanism to clamp and fix electrodes and insert them into the ground, and the electrode spacing adjustment mechanism to translate the positions of each clamping and insertion mechanism to precisely adjust the distance between the electrodes. The graduated scale allows for visual observation of the specific positions. This precise adjustment of the electrode positions not only improves the accuracy of the detection data but also increases the detection efficiency.

The invention provides a deep solid resource mining multi-source forecast information joint detection and interpretation system and method. The method comprises the steps that firstly, rapid delineation of a large-scale water-rich stratum and a goaf is achieved through air-ground joint electromagnetic detection; performing long-distance positioning and imaging on a front disaster-causing structure on a mining surface by using an active / passive source earthquake technology; and fine detection of the sub-meter water guide channel and the disaster body is realized through in-hole directional radar, induced polarization and sound wave observation. And finally, performing multi-field joint inversion and comprehensive interpretation by fusing multi-source geophysical field data, and accurately depicting spatial distribution, attribute characteristics and evolution processes of disaster sources. According to the method, the limitation and multiplicity of solutions of a single geophysical exploration method are effectively overcome, and the comprehensiveness, precision and reliability of disaster forecasting before deep solid resource exploitation are remarkably improved.

The application discloses a kind of based on the measurement method of geologic hazard body slip surface of induced polarization effect, comprising: drilling N work drill holes in the rear end of potential landslide body to be detected;High polarizability and lower viscosity slurry are injected into work drill hole;Using the werner device with equal electrode distance, apparent polarizability under several first electrode distances along the direction of landslide body is obtained;The distance of electrode is increased, and apparent polarizability under several second electrode distances along the direction of landslide body is repeatedly obtained;Apparent polarizability dataset is formed, and apparent polarizability pseudo-section is drawn according to apparent polarizability dataset;According to apparent polarizability pseudo-section, high polarizability distribution law is analyzed, and preliminary slip surface position is obtained;The apparent polarizability dataset is inverted, and apparent polarizability inversion section is obtained;According to apparent polarizability pseudo-section and apparent polarizability inversion section, the accurate slip surface position is obtained.

The invention relates to the technical field of geophysical exploration, in particular to a blasting zoning method based on the geophysical exploration technology. The method comprises the following steps: synchronously acquiring multi-source data such as seismic waves, resistivity and induced polarization, and generating a high-precision static rock physical parameter three-dimensional model through cross gradient joint inversion; obtaining three-dimensional distribution of dynamic damage factors through calibration blasting and full-waveform inversion; fusing the static and dynamic parameters, and constructing a three-dimensional geomechanical model containing mechanical parameters by means of a machine learning model; intelligent blasting partitioning is realized based on a multi-index fusion rule, and a customized blasting design scheme is automatically generated; and finally, self-evolution of the model is driven through blasting effect feedback. The defects that a traditional method is single in data, disjointed in dynamic and static, dependent on experience and the like are overcome, and precision, intellectualization and self-adaptive optimization of blasting partition are achieved.

A SERF inertial measurement unit based on a rotating planar multi-pass optical cavity enhances the system's signal-to-noise ratio while eliminating the projection component of the optical path in the longitudinal polarization direction and suppressing the coupling of photo-induced polarization noise. This is significant for improving the sensitivity of inertial measurement units. The unit is characterized by an alkali metal gas chamber with a cavity structure enclosed by transparent glass. The incident detection light side of the cavity uses a first inner-coated reflective film glass, and the exit detection light side uses a second inner-coated reflective film glass. The first inner-coated reflective film glass has a mirror-coated portion on the incident side inner cavity surface and a light-transmitting portion on the uncoated incident side inner cavity surface. The second inner-coated reflective film glass has a mirror-coated portion on the exit side inner cavity surface and a light-transmitting portion on the uncoated exit side inner cavity surface. The light-transmitting portion on the incident side inner cavity surface is located at the lower left corner of the xy-plane, and the light-transmitting portion on the exit side inner cavity surface is located at the upper right corner of the xy-plane. The alkali metal gas chamber achieves a rotating planar multi-pass optical cavity within the cavity through angular displacement around the z-axis.

The application belongs to the technical field of surveying, and provides an improved method for surveying underground water in high-resistance surrounding rock area by using transient electromagnetic method, which comprises the following steps: obtaining high-resistance surrounding rock area, collecting transient electromagnetic data in the high-resistance surrounding rock area, checking whether negative response exists in late channel, introducing Cole-Cole model to carry out forward modeling when the negative response exists, extracting zero-frequency resistivity, charging rate, time constant and frequency correlation coefficient, simultaneously solving zero-frequency resistivity and three induced polarization parameters by using quasi-two-dimensional regularization Newton inversion, and delineating underground water-bearing stratum by joint interpretation of zero-frequency resistivity and three induced polarization parameters. The application is aimed at the negative response of late channel caused by induced polarization effect of underground water in high-resistance surrounding rock area, and can extract zero-frequency resistivity and other three induced polarization parameters by using the negative response, and carry out underground water surveying by using quasi-two-dimensional regularization Newton inversion interpretation.

The invention discloses an electrical source transient electromagnetic method, system and device for avoiding an induced polarization effect, and a medium, and relates to the technical field of geophysical exploration. The method comprises the following steps: exciting a secondary field for a target area by adopting square wave pulses with set pulse width and set duty ratio; collecting a vertical induced voltage component of the secondary field by adopting a magnetic rod or a coil; calculating full-period apparent resistivity based on the vertical induced voltage component and the pulse response function, and constructing an underground resistivity structure through a three-dimensional inversion algorithm to obtain a resistivity image; the resistivity imaging is used for describing a transient electromagnetic exploration result. According to the method, the problems of IP effect interference and low inversion precision in a traditional transient electromagnetic method can be solved, and resistivity high-precision imaging without IP interference is realized.

The application provides a tunnel induced polarization inversion imaging method and device, and the tunnel induced polarization inversion imaging method comprises the following steps: establishing a resistivity initial model m0; performing inversion iteration according to the resistivity initial model m0 and outputting a resistivity model m1; establishing a polarization rate initial model η0; constructing a polarization rate reference model η based on the resistivity model m1 r2 ; performing inversion iteration according to the polarization rate reference model η r2 , and outputting a polarization rate inversion result η1. The tunnel induced polarization inversion imaging method is based on the idea of sequential inversion, a polarization rate inversion reference model is constructed under the premise of obtaining a resistivity inversion result, a polarization rate inversion reference model η r2 is constructed and a polarization rate inversion reference model constraint inversion equation is derived, the tunnel induced polarization inversion imaging method ensures that inversion converges in the correct direction, and solves the problem that traditional polarization rate inversion is prone to local optimization and difficult to converge.

The utility model relates to an intensification-polarization instrument for deep resource exploration, and relates to the technical field of detection instruments, the intensification-polarization instrument comprises a base and a receiver, the top of the base is fixedly connected with a vertical plate, the interior of the vertical plate is slidably connected with an anti-winding mechanism, the anti-winding mechanism comprises a sliding rod, the exterior of the sliding rod is fixedly connected with a connecting rod, and the connecting rod is fixedly connected with the receiver. And a support is fixedly connected to the outer portion of the sliding rod, a pulley is rotatably connected to the interior of the support, a connecting rod is rotatably connected to the interior of the connecting rod, and a driving assembly is fixedly connected to the interior of the base. According to the utility model, the motor I is started, the driving disc rotates to drive the connecting rod to swing, the sliding rod slides in the slideway of the vertical plate through the connecting rod, the bracket and the pulley are driven to move, the pulley guides the winding rope, orderly arranges and winds the winding rope, the winding rope is prevented from being wound, and the effect of orderly winding is realized; and the stability and the reliability of winding and unwinding the winding rope by the intensification-polarization instrument in deep resource exploration are ensured.

The application discloses a method for exciting polarization medium transient electromagnetic forward fast selection of central frequency, and belongs to the technical field of geophysical prospecting, and comprises the following steps: firstly, determining three-dimensional forward time step iteration parameters and a central frequency range, and constructing a Cole-Cole model; then, sequentially performing Padé series approximation on the discrete central frequency vector and the angular frequency vector at each frequency point to obtain an expansion format of each frequency point; respectively calculating time domain pulse responses of the expansion format and the Cole-Cole model and relative errors thereof, obtaining a two-dimensional distribution of the relative errors, expanding the Cole-Cole model by using the Padé series approximation method, and starting three-dimensional forward calculation of the Cole-Cole model with the exciting polarization effect. The application can provide a fast central frequency selection method for developing three-dimensional forward calculation of transient electromagnetic waves in the underground polarized medium, and is the basis of geophysical transient electromagnetic prospecting.

The application relates to a kind of neural network-based electric source induction-polarization symbiotic effect multi-parameter imaging method.According to the fractional order model of polarized medium, the conductivity formula is substituted into Maxwell equation, and the electric source induction-polarization symbiotic effect formula is derived.According to the geological data of the experimental area, the polarized medium model of different conductivity, polarization rate, frequency dispersion coefficient and time constant parameters is constructed and numerically simulated to construct a sample set.The structure and activation function of the neural network are optimized, the neural network is trained and the performance is optimized.The neural network is applied to extract the multi-parameter of polarized medium from the measured data of electric source induction-polarization symbiotic effect, and multi-parameter-depth imaging is realized.The purpose of the application is to extract the multi-parameter information of polarized medium, and the conductivity and polarization rate imaging results are more accurate compared with the traditional resistivity imaging method.

This invention provides a method for comprehensively evaluating permeability coefficient and water inflow in tunnels using geophysical parameters. By testing rock cores in lithologically varying sections, the permeability coefficient, P-wave velocity, and relaxation time of the cores are obtained. A comprehensive permeability coefficient prediction model is constructed. The P-wave velocity and relaxation time distributions for the construction section are predicted using seismic wave analysis and induced polarization analysis. Based on the obtained P-wave velocity and relaxation time distributions, the permeability coefficient of each grid is calculated using the comprehensive permeability coefficient prediction model. The equivalent nodal flow rate numerical method is then used to predict the tunnel's water inflow based on the permeability coefficient distribution imaging results. This invention improves the accuracy of water inflow prediction to a certain extent and is applicable to water inflow prediction in long-distance tunnel construction, solving the problem of permeability evaluation and water inflow estimation in complex tunnel environments.

The present application relates to the technical field of photoelectrochemical performance analysis, and discloses a method for quantitatively analyzing photoelectrochemical performance based on polarization potential calibration, which comprises the following steps: (1) in a three-electrode system, photo-induced OCP of a semiconductor electrode with a photoelectric functional coating is tested under solution environment and light, and a photo-induced polarization curve of the semiconductor electrode is obtained; (2) in a three-electrode system, dark-state OCP of the semiconductor electrode is tested under solution environment and closed light, and a dark-state polarization curve of the semiconductor electrode is obtained; (3) according to the photo-induced polarization curve and the dark-state polarization curve, a semi-logarithmic polarization curve, a current density-potential curve, a ΔE-i curve and a ΔE-Δi curve are obtained; and (4) photoelectrochemical performance of the semiconductor electrode is analyzed according to the curves. The method can directly characterize actual photo-induced current density of the photoelectric functional coating and quantitatively analyze electrochemical performance thereof.