20 results about "Induced polarization" patented technology

The tunnel hole induced polarization device comprises a plurality of electrodes divided into a plurality of electrode arrays; a power supply control module provides different currents to the plurality of electrode arrays; a voltage sampling module collects potential differences generated by the tunnel hole induced polarization of the plurality of electrode arrays; a collection module collects the potential differences and converts and transmits the potential differences to an upper computer and converts and transmits instructions of the upper computer to a driving control module; the driving control module drives the power supply control module and the voltage sampling module respectively, the power supply control module comprises a power supply bus and a power supply relay array; an electromagnetic shielding module is arranged on the power supply relay array and is used for suppressing transient electromagnetic interference of a coil and electromagnetic interference of a switch contact.

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 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 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.

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.

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 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 application discloses a kind of geological abnormal area identification method and system based on excitation polarization method, the present application is based on geological data fusion, target area positioning is realized by geological modeling and target weight analysis, the purpose of enhancing the amplitude of physical property anomaly is reached by resistivity, polarization rate attribute modeling, excitation polarization method anomaly coefficient calculation, accurate identification of geological anomaly is reached by physical property and anomaly coefficient clustering analysis and anomaly cluster extraction, the purpose of accurate identification of geological anomaly is reached by geological anomaly target area weight distribution and multi-attribute fusion analysis and comparison.The present application uses multiple data information by data fusion, weight analysis, physical property parameter modeling, anomaly coefficient calculation, clustering analysis and multi-attribute fusion analysis etc. Key technologies, improve exploration accuracy and efficiency, can more accurately identify geological abnormal area.The present application enhances weak physical property anomaly by excitation polarization method anomaly feature calculation, improves the accuracy of anomaly identification.

The application provides a mine roof water disaster monitoring method based on the induced polarization method and related equipment, and two drilling modes are provided according to the development position of the water flowing fractured zone on the mine roof: when the water flowing fractured zone develops to the ground, vertical drilling is selected on the side close to the ground of the mine roof, the electrode string arranged in the drilling is more easily avoided from the caving zone in the mine roof, the drilling difficulty is reduced, and the drilling cost is saved while the monitoring accuracy is ensured; and when the water flowing fractured zone does not develop to the ground, drilling with a certain angle is selected on the side close to the working face of the mine roof, the electrode string can enter the water flowing fractured zone when the drilling depth is shallow, accurate monitoring data of the electrode string are obtained, the drilling difficulty is reduced, and the drilling cost is saved. Then, the apparent resistivity and the apparent polarization rate of the surrounding rock of the mine roof are monitored in real time through the electrode string, and the water inrush of the coal seam roof is quickly and accurately monitored.

The application discloses a kind of resistivity extraction methods based on single pole distance induced polarization sounding, including obtaining the parameter information of single pole distance induced polarization sounding scheme;Arrangement power supply electrode;Determine the distribution of measuring point;In turn with each measuring point as center determine magnetic field observation direction;Power supply electrode is powered, corresponding magnetic field observation is carried out and observation signal is obtained;Iterative calculation obtains apparent resistivity and is combined with corresponding apparent depth, different depth resistivity information is obtained by inversion, completes the resistivity extraction based on single pole distance induced polarization sounding.The application also discloses a kind of system for realizing the resistivity extraction based on single pole distance induced polarization sounding of the application.By observing the horizontal magnetic field of induced electric field to extract the resistivity information of different depth, the time domain induced polarization sounding parameter is expanded, the detection effect can be improved, and the reliability is high, accurate.

This invention relates to the field of geophysical exploration technology, specifically to a high-precision three-dimensional forward modeling method for airborne electromagnetic spectral elements considering induced polarization effects. Based on the Cole-Cole model, a complex conductivity expression considering induced polarization effects is established, and the frequency domain Helmholtz equation is introduced to construct the corresponding governing equations. A regular hexahedral mesh is generated, and reference domain vector basis functions are constructed using the Gauss-Lobatto-Legendre orthogonal polynomial method according to the spectral element method. The mapping relationship between these functions and physical mesh elements is established. The Galerkin weighted residual method is applied to discretize the governing equations into element system matrices, which are then assembled to form the overall system matrix and the corresponding linear equation set. A direct solver is used to obtain the frequency domain three-dimensional electromagnetic response, and the time domain three-dimensional forward modeling result of the computational region is obtained through Hankel transformation. This invention achieves rapid and high-precision three-dimensional forward modeling simulation of complex geological models containing induced polarization effects.

The present application relates to the field of geophysical prospecting technology, in particular to a variable power supply distance electrical sounding method in geophysical prospecting; first, determine each position point in the region to be measured, and each position point is on the same straight line, then determine the detection point in each position point, embed the detection electrode into the detection point, and embed two power supply electrodes into the first position point and the adjacent second position point respectively; then change the embedding position of the two power supply electrodes, so as to obtain multiple groups of measured potential difference collected by the two detection electrodes through the detection host, calculate the apparent induced polarization parameters of the region to be measured based on the multiple groups of measured potential difference collected by the two detection electrodes, and carry out geological inversion analysis; the whole process does not need to move the detection electrode, only needs to change the embedding position of the power supply electrode, so that the geological conditions of the region to be measured can be quickly inverted, which is a more efficient and better electrical prospecting technology scheme.

The application discloses an electric source transient electromagnetic method, system, device and medium for avoiding induced polarization effect, and relates to the technical field of geophysical exploration. The method comprises the following steps: a square wave pulse with a set pulse width and a set duty cycle is used to excite a secondary field in a target area; a magnetic bar or a coil is used to collect a vertical induced voltage component of the secondary field; full-period apparent resistivity is calculated based on the vertical induced voltage component and a pulse response function, and a three-dimensional inversion algorithm is used to construct a subsurface resistivity structure to obtain resistivity imaging; and the resistivity imaging is used to describe transient electromagnetic exploration results. The application can solve the problems of IP effect interference and low inversion accuracy in traditional transient electromagnetic methods, and realizes high-precision resistivity imaging without IP interference.

The application belongs to the field of geological advance prediction, and provides a power supply device and method for induced polarization advance detection electrode for TBM construction. The device comprises a movable arch, a movable track, a telescopic multi-degree-of-freedom drilling machine, an image acquisition device, a controller and a telescopic power supply electrode. The movable track is connected with a movable track driving assembly. The movable track driving assembly, the telescopic multi-degree-of-freedom drilling machine, the image acquisition device and the telescopic power supply electrode are all connected with the controller. The image acquisition device is used for acquiring the current drilling position image and transmitting the image to the controller. The controller is used for judging whether there is sundry according to the drilling position image, so as to control the movable track driving assembly to drive the movable track to move to the next drilling position until there is no sundry in the drilling position to which the movable track moves, and to control the telescopic multi-degree-of-freedom drilling machine to perform drilling action, while the telescopic power supply electrode is controlled to extend into the drilling hole. The device can improve the reliability and stability of detection.

To address the limitations of existing chopping decoupling methods, such as waveform distortion and residual interference, which cause weak induced polarization (IP) signals at deep depths to be submerged by noise and fail to meet the requirements for deep ore body identification, this invention provides a half-wave decoupling method and apparatus for IPD detection based on multi-level transmission. By employing single-field-source multi-level transmission technology at the transmitting end, a multi-level signal waveform is synthesized to provide a waveform signal for decoupling at the receiving end. Furthermore, at the receiving end, a translation-convolution decoupling method is proposed. Through waveform translation, frequency-division convolution, and signal amplitude compensation, the electromagnetic coupling signal and the effective IPD signal are accurately separated, avoiding the loss of effective signal in traditional chopping decoupling methods.

This invention discloses a lightweight, multi-parameter detection and monitoring system and method for potential hazards in dikes, belonging to the field of water conservancy engineering safety monitoring and geophysical exploration technology. The system includes: a lightweight acquisition station connected to an external electrode array deployed on the dike cross-section, used to acquire the original time-series waveform containing primary field potential and excitation polarization attenuation signals; adaptive filtering and integration of the original time-series waveform to obtain the apparent resistivity and apparent polarizability at each measuring point; a quasi-real-time inversion unit, used to perform constrained inversion on the received apparent resistivity and apparent polarizability to obtain the spatial resistivity distribution and spatial polarizability distribution of the dike soil; and a multi-parameter fusion inversion unit, used to obtain derived engineering parameters characterizing the state of the dike soil based on the received spatial resistivity and spatial polarizability distributions and a pre-constructed geophysical relationship conversion model. This invention enables the direct conversion from basic geophysical parameters to engineering safety diagnostic indicators.

The application discloses a method and device for predicting the permeability of dense sandstone based on induced polarization parameters, and the method comprises the following steps: performing complex resistivity testing on a dense sandstone sample core in a target area, and extracting complex resistivity data; extracting induced polarization parameters by using an MGEMTIP model inversion according to the complex resistivity data; and obtaining the permeability of the dense sandstone in the target area by using a pre-trained nonlinear relationship model between the induced polarization parameters of the dense sandstone and the permeability, wherein the nonlinear relationship model between the induced polarization parameters of the dense sandstone and the permeability is based on a GA-BP neural network model architecture.

This invention discloses a nodal-type well-induced polarization field observation device and method. By setting up a downhole data acquisition device and a ground receiver, the downhole data acquisition device includes a data transmission module, a multi-node acquisition unit, and a counterweight. The multi-node acquisition unit includes multiple node acquisition modules and multiple connection modules. The modular design enables digital transmission of downhole signals, avoiding signal coupling caused by long cables in traditional well-induced polarization observation. Through the nodal observation method and flexible connection modules, the large electrode potential gradient measurement requirement specified in the well-induced polarization law is achieved in small-diameter boreholes, increasing the useful signal strength. The nodal design of the transmission section allows for arbitrary replacement of the number of node acquisition modules, improving data acquisition efficiency, and also allows for arbitrary replacement of the node sampling units, greatly improving the applicability of the well-induced polarization field observation device.