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309 results about "Induced polarization" patented technology
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Induced polarization (IP) is a geophysical imaging technique used to identify the electrical chargeability of subsurface materials, such as ore. The polarization effect was originally discovered by Conrad Schlumberger when measuring the resistivity of rock.
Comprehensive advanced geological detection system carried on tunnel boring machine
ActiveUS20150233242A1Improve accuracyImprove efficiencySeismic signal processingTunnelsDecision systemComputer module
The present invention presents a comprehensive advanced geological detection system carried on a tunnel boring machine. The comprehensive advanced geological detection system includes a multifunctional combination main frame, an induced polarization detection device, a seismic wave detection device, an integrated junction device, a borehole ground penetrating radar detection device and a comprehensive interpretation and decision system; the multifunctional combination main frame includes a time division multiplexing control module, an excitation source control module and a parallel data acquisition module; the excitation source control module outputs trigger signals to the three detection devices respectively, and the three detection devices respectively output measurement data and feedback signals to the time division multiplexing control module through the parallel data acquisition module; and the comprehensive interpretation and decision system supports geological interpretations and decisions through the inversion / migration imaging joint inversion of three detection methods.
Owner:SHANDONG UNIV
Roadway drivage drilling induced polarization advance water probing forecasting method, device and probe
ActiveCN102768369AAchieving advanced water exploration and forecastingEasy to identifyElectric/magnetic detection for well-loggingWater resource assessmentBusiness forecastingGeological structure
The invention discloses a roadway drivage drilling induced polarization advance water probing forecasting method, device and probe. The probe is placed in a drill hole; a power supply negative electrode B is mounted in a roadway outside the drill hole and is connected with an on-site main machine by a power supply cable; a power supply positive electrode A, a measuring electrode M and a measuring electrode N of the probe are mounted inside the drill hole, and are connected with the on-site main machine by the power supply cable and a signal cable; the power supply positive electrode A and the power supply negative electrode B outside the drill hole form the power supply cable; the on-site main machine measures an electric field change signal by the measuring electrode M and the measuring electrode N of the probe; and the electric field change signal is input to the main machine to calculate and detect the apparent resistivity and apparent chargeability of a target; the probe is propelled to repeat the steps at each measuring point to measure the apparent resistivity and apparent chargeability of each point and generate a resistivity profile map and a chargeability profile map; and the rate of change of the apparent resistivity and apparent chargeability is calculated to determine an inner geological structure taking a drilling axis as a central cylindrical space.
Owner:WUHAN CONOURISH COALMINE SAFETY TECH +1
Comprehensive advance geological detection system carried by tunnel boring machine
ActiveCN103713335AImprove efficiencyImprove accuracyGeological measurementsDecision systemWave detection
The invention discloses a comprehensive advance geological detection system carried by a tunnel boring machine. The comprehensive advance geological detection system comprises a multifunctional combination main frame, an induced polarization detection device, an earthquake wave detection device, an integrated junction device, a drilling geological radar detection device and a comprehensive interpretation decision system. The multifunctional combination main frame comprises a time division multiplexing control module, an excitation source control module and a parallel data collecting module. The excitation source control module outputs trigger signals to the three detection devices respectively, the three detection devices respectively output measurement data and feedback signals to the time division multiplexing control module through the parallel data collecting module. The comprehensive interpretation decision system supports geological interpretations and decisions through the inversion / migration imaging joint inversion of three detection methods. The detection system greatly improves the automation degree and detection speed of detection equipment on the tunnel boring machine, and multiple kinds of detection equipment can be carried by the tunnel boring machine.
Owner:山东百廿慧通工程科技有限公司
Advanced detection system and method for TBM (Tunnel Boring Machine) tunnel construction based on forward three-dimensional induced polarization
ActiveCN103076635ACompatibleAutomatically and quickly assign jobsElectric/magnetic detectionAcoustic wave reradiationBound waterWater flow
The invention discloses an advanced detection system and method for TBM (Tunnel Boring Machine) tunnel construction based on forward three-dimensional induced polarization. By fully utilizing a narrow detection space of a full-face excavated tunnel, controlling the opening of cabin doors of a power supply and measuring electrode cabin and a shielding electrode cabin through controllers, and controlling corresponding hydraulic transmission devices to automatically and rapidly arrange power supply, measurement and shielding electrode systems onto a TBM tunneling working face and side wall bottom plates at the rear of the TBM tunneling working face, under the effect of a shielding current system, tomographic detection power supply current points to the front of the working face. By using the detection method based on the forward three-dimensional induced polarization, the three-dimensional geological information of the front of the working face can be obtained. Moreover, by using a relation between induced polarization half-time difference and water flow, the magnitude of the water flow of a water body can be quantitatively forecasted. In addition, the parameter, i.e. the half-time difference has a stronger ability of distinguishing free water and bound water.
Owner:山东百廿慧通工程科技有限公司
Methods and apparatus for measuring electrical properties of a ground using an electrode configurable as a transmitter or receiver
An apparatus for measuring induced polarization of the ground. The apparatus includes a polarizable contact member configured to transmit a current to the ground. An electrode includes a first conductor and a second conductor. The first conductor is coupled to the polarizable contact member. A non-polarizable contact member is coupled to the second conductor of the electrode and is configured to measure an electrical potential associated with the current.
Owner:ADVANCED GEOSCI
Advanced detector system and method using forward three-dimensional induced polarization method for tbm construction tunnel
ActiveUS20140333308A1Improve work efficiencyLow costElectric/magnetic detection for well-loggingSurveyBound waterEngineering
Disclosed is an advanced detector system and method using a forward three-dimensional induced polarization method for a TBM (Tunnel Boring Machine) construction tunnel. A narrow detection space of a full-face excavated tunnel is fully used, a controller controls doors of a source and measuring electrode compartment and a shielding electrode compartment to open and controls a corresponding hydraulic delivery device to automatically and quickly arrange a source electrode system, a measuring electrode system and a shielding electrode system. Under the action of a shielding current system, tomography detection supply current is directed ahead of the working face. Three-dimensional geologic information can be obtained, and the relationship between an induced polarization half-decay time difference and a water quantity can be used to quantitatively forecast the water quantity of a water-bearing body, and meanwhile, the half-decay time difference parameter has a high capacity of distinguishing free water from bound water.
Owner:SHANDONG UNIV
Method for accurately evaluating targets containing oil gas in clastic rock basin
ActiveCN101520517AAccurate identificationImprove drilling success rateElectric/magnetic detectionAcoustic wave reradiationTime domainData acquisition
The invention relates to a geophysical oil gas prospecting method which is capable of accurately evaluating targets containing oil gas in clastic rock basin and based on resistivity and induced polarization effect and comprises the specific steps of collecting data from a target area, processing the collected data on time domain and frequency domain, obtaining all-time apparent resistivity and phase curve, drawing a plane anomaly chart of polarization effect, and comparing the chart with the anomaly mode of an oil gas reservoir to determine oil-bearing trap as well as the position border of the oil reservoir and accurately recognize the favorable targets containing oil gas. The invention adopts a high-precision artificial source time frequency deep sounding method for sounding the solid change of electric properties from shallow to deep, including resistivity R and polarizability IP, thus being capable of accurately recognizing the favorable targets containing oil gas and further improving the success ratio of drilling.
Owner:BGP OF CHINA NAT GASOLINEEUM CORP
Measurement mechanism and measurement method of ferroelectric materials electric hysteresis loop wire
InactiveCN101158712AGuaranteed accuracyResistance/reactance/impedenceCurrent density measurementsHysteresisMeasurement device
The invention discloses an apparatus for measuring the ferroelectric hysteresis of ferroelectric materials which is based on a current measurement circuit, as well as a measurement method thereof. The invention inputs a simulated output signal generated by a computer processing unit into a high voltage amplifier through a signal source and a data acquisition board, thus giving excitation voltage to a sample being tested, and then through a sampling resistance R0, sampled current signal is input into a signal regulating module through an operational amplifier, and then the sampled current signal is transmitted back into the computer processing unit through the data acquisition board. By separating the current signal acquired from the measurement into three parts as linear polarization, non-linear polarization and electric loss, the measurement system is provided with not only the function of measuring the P-E relationship, but also the function of acquiring the relationship between the real spontaneous polarization and induced polarization of the dielectric substance being tested and the field intensity. Furthermore, by superimposing actuating signal of a small alternative electric field to a bias electric field with constant intensity and synchronously collecting the corresponding change information of the polarization intensity of the sample being tested, then the reversible permittivity can be acquired.
Owner:XI AN JIAOTONG UNIV
Directional induced polarization real-time advance water detecting device and method while drilling for tunnel construction
ActiveCN103076636AVisualizing apparent resistivityResults visualizationElectric/magnetic detectionAcoustic wave reradiationCouplingLow resistance
The invention discloses a directional induced polarization real-time advance water detecting device while drilling for tunnel construction. The device comprises a drill bit, a high-strength insulated sleeve while drilling, and a directional induced polarization detection system, wherein the drill bit is connected with the high-strength insulated sleeve while drilling through a connecting bearing, and the directional induced polarization detection system is distributed at the periphery of the high-strength insulated sleeve while drilling. The invention also provides a corresponding directional induced polarization real-time advance water detecting method while drilling for tunnel construction. According to the device and the method disclosed by the invention, the interference of the construction environment is avoided, the detection effect is better, the utilization efficiency of an advance borehole is improved, current orientation is realized, the low resistance at the borehole wall is broken through, the detection range is enlarged, an electrode is protected, and a better coupling contact between the electrode and a rock-soil body is guaranteed.
Owner:山东百廿慧通工程科技有限公司
Micro-optics solar energy concentrator
Due to an ever growing shortage of conventional energy sources, there is an increasingly intense interest in harnessing solar energy. The instant invention can contribute to the goal of achieving environmentally clean solar energy to be competitive with conventional energy sources. Method and apparatus are presented for coupling to a transparent sheet with an embedded array of preformed or formable mirrored micro-balls for use in a solar energy concentrator, and functionally similar applications such as optical switches and solar rocket assist. Mirrored micro-balls and particulate formable mirrors in cells are covered with a thin spherical shell of lubricating liquid so that they are free to rotate in an almost frictionless encapsulation in the sheet. Induced polarization electric or magnetic dipoles in the mirrors provide a method of controlling the alignment of the mirrored balls. Electrophoretically and magnetophoretically forming mirrors in situ on a rigid surface in a rotatable cell are also disclosed. Confining the balls and cells in cavities within a single sheet, rather than loosely between two sheets, allows for greater alignment accuracy which is needed for higher concentrations with gains greater than 10×. Immersing balls and cells in a lubricating fluid permits nearly frictionless rotation which reduces the power requirement for rotation, and further enables greater alignment accuracy as the impediment of unnecessary friction need not be overcome.
Owner:RABINOWITZ MARIO
Advanced detection method for focusing chromatography induced polarization of underground engineering
ActiveCN102508303ARealize 3D reconstructionAchieving Water Quantity EstimationWater resource assessmentElectric/magnetic detectionPotential differenceEngineering
The invention relates to an advanced detection method for focusing chromatography induced polarization of underground engineering. The advanced detection method comprises the following steps of: arranging a circle of shield electrodes A1 on a contour line of an operating surface of the underground engineering by utilizing a focusing operating manner and arranging a plurality of parallel measuringlines on parts with different heights from a base plate to a top plate firstly, wherein the measuring lines are provided with power supply electrodes and receiving electrodes, and the base plate is also provided with power supply electrodes and receiving electrodes; acquiring data layer by layer by utilizing a chromatography method; carrying out inversion on measuring line potential difference data obtained through measurement to obtain a three-dimensional resistivity image of a geologic body in the front of the operating surface; drawing a relation coordinate graph of difference data and horizontal distances of half time by using the half time obtained through measurement, calculating an envelope area St of half time difference and abscissa axis, and drawing a two-dimensional profile mapof the envelope area St to realize estimation of the quantity of water in the front of the operating surface. The advanced detection method for the focusing chromatography induced polarization of theunderground engineering, disclosed by the invention, has excellent advanced detection directivity, realizes three-dimensional location of an aquifer and solves problem of incapability of location in a traditional focusing electric method during single-point measurement.
Owner:SHANDONG UNIV
Artificial source frequency domain electromagnetic sounding device and measurement method
InactiveCN102183792AHigh resolutionImprove resolutionElectric/magnetic detectionAcoustic wave reradiationFrequency spectrumFrequency conversion
The invention discloses an artificial source frequency domain electromagnetic sounding device and a measurement method; the device provided by the invention comprises an emitting system and a receiving system; the emitting system can be used for realizing frequency conversion emission according to a measurement demand, the receiving system is a master-slave distributed acquiring system composed of a master station and a plurality of acquiring stations to measure the whole measurement line simultaneously. The measurement method comprises the following steps: roughly measuring the measurement when performing the artificial source frequency domain electromagnetic sounding, processing and imaging a measurement result at field to find a frequency range corresponding to an abnormal object, encrypting a frequency point and performing the detailed survey aiming at an abnormal position, gradually detailing the frequency point distribution until meeting a resolution requirement to the abnormal object; a different-density frequency point distribution measurement method is adopted in the whole measuring frequency band, the frequency point is encrypted only aiming at a target, the resolution capability to the target is improved and the work efficiency is improved. The measurement method not only can be applied to a controllable source audio magnetotelluric method and a frequency electromagnetic sounding method, but also can be spread to a frequency spectrum induced polarization and a complex resistivity method.
Owner:JILIN UNIV
Geophysical technique for mineral exploration and discrimination based on electromagnetic methods and associated systems
ActiveUS20070061080A1Realistic representationElectric/magnetic detection for well-loggingSeismology for water-loggingAnalytical expressionsMicroscopic scale
Mineral exploration needs a reliable method to distinguish between uneconomic mineral deposits and economic mineralization. A method and system includes a geophysical technique for subsurface material characterization, mineral exploration and mineral discrimination. The technique introduced in this invention detects induced polarization effects in electromagnetic data and uses remote geophysical observations to determine the parameters of an effective conductivity relaxation model using a composite analytical multi-phase model of the rock formations. The conductivity relaxation model and analytical model can be used to determine parameters related by analytical expressions to the physical characteristics of the microstructure of the rocks and minerals. These parameters are ultimately used for the discrimination of different components in underground formations, and in this way provide an ability to distinguish between uneconomic mineral deposits and zones of economic mineralization using geophysical remote sensing technology.
Owner:THE UNIV OF UTAH +1
Method for realizing oil-gas detection by applying long-offset distance transient electromagnetic array method
InactiveCN102053281AEliminate late aberrationsImprove inversion accuracyElectric/magnetic detection for well-loggingAcoustic wave reradiationPolarizabilityTransient electromagnetics
The invention relates to a method for realizing oil-gas detection by applying a long-offset distance transient electromagnetic array method. The method comprises the following steps: firstly, carrying out ATEM (analytical transmission electron microscopy) observation on a detection region to acquire data; selecting measuring points without obvious distortion or negative anomaly of electric field components while an induced polarization field is not stripped, utilizing the ATEM data for inversion, and acquiring a high-resolution lamellar specific resistance model in a detection region; then carrying out ATEM forward operation to obtain transient induced electric field or magnetic field attenuation curves of all the measuring points in the detection region; substracting the electric field or magnetic field component attenuation curve acquired during forward operation by the actually observed ATEM electric field or magnetic field component attenuation curve at the same observation time point to obtain a time domain induced polarization spectrum; applying a time domain induced polarization method for inversion to obtain the polarizability of an underground medium; and carrying out detection and evaluation on an oil-gas reservoir by utilizing the specific resistance and polarizability parameters. According to the invention, the accuracy and reliability of exploration on the oil-gasreservoir by utilizing an electromagnetic method are greatly enhanced, the working efficiency is improved, and the exploration cost is lowered.
Owner:中石化石油工程技术服务有限公司
Three-dimensional induced polarization method advanced forecast system carried by earth pressure balance shield, and detection method
ActiveCN105068128AAchieving advanced detectionIncrease distanceElectric/magnetic detection for well-loggingWater resource assessmentHigh resistanceAutomatic control
The invention discloses a three-dimensional induced polarization method advanced forecast system carried by an earth pressure balance shield, and a detection method. The system penetrates a needle-like electrode into soil for power supply and acquisition by use of a push electrode system carried by a cutter head and overcomes the difficulty of zero detection space in a conventional earth pressure balance shield. Detection currents are enabled to be distributed forwards by use of a shielding electrode, and a guniting device on the cutter head injects a high-resistance grouting material towards soil around the cutter head and the shield, and the difficulties of electromagnetic interference and conduction of currents by taking the shield as a good conductor are overcome. By use of automatic control in a whole process, multipath parallel acquisition and a rapid inversion means, the difficulty of small detection time is overcome. The method provided by the invention realizes detection of spherical weathering bodies, soft and hard layered strata, front full-section hard rocks, pebble layers and muddy layers by use of resistivity differences among geologic bodies; and detection of water containing condition of a water-rich layer by use of excitation polarization half failure is realized.
Owner:SHANDONG UNIV
Interwell parallel resistivity CT (computed tomography) testing method
ActiveCN102419455ARealize integrationRealize lifting automationElectric/magnetic detection for well-loggingComputed tomographyData acquisition
The invention discloses an interwell parallel resistivity CT (computed tomography) testing method which is a geophysical prospecting technology for probing geologic conditions and structural features between drill holes. In the method, through arranging a testing system between every two drilling wells, an interwell measuring line with 64 electrodes is formed; a parallel electrical method data collection technology is utilized to carry out monopole or dipole power supply and test, thus interwell electrical property collected data are obtained, and intewell chromatography data bodies between different electrodes are formed; and an interwell resistivity tomography technology is utilized to carry out resistivity and induced polarization parameter tomography on a test area, thus the terrane and structural feature conditions are further evaluated, and geologic interpretation achievement and recognition are obtained. The testing system can be used for achieving data collection of a 1200m deep well.
Owner:ANHUI UNIV OF SCI & TECH
Applications of wideband em measurements for determining reservoir formation properties
InactiveUS20080290874A1Electric/magnetic detection for well-loggingSeismology for water-loggingWidebandGeophysics
A method for determining reservoir formation properties that consists of exciting the reservoir formation with an electromagnetic exciting field, measuring an electromagnetic signal produced by the electromagnetic exciting field in the reservoir formation, extracting from the measured electromagnetic signal a spectral complex resistivity as a function of frequency, fitting the spectral complex resistivity with an induced polarization model and deducing the reservoir formation properties from the fitting with the induced polarization model.
Owner:SCHLUMBERGER TECH CORP
Underground construction water burst source advance geology forecast three-dimensional focus induced polarization equipment
ActiveCN103064121AHigh precisionImprove efficiencyElectric/magnetic detectionAcoustic wave reradiationData acquisitionPersonal computer
The invention discloses underground construction water burst source advance geology forecast three-dimensional focus induced polarization equipment which comprises a constant current multipath transmitter, a multichannel intelligent receiver, a multipath electrode automatic translator, an industrial personal computer, an observation electrode array and a bucking electrode. Electrodes in the observation electrode array are chosen to serve as a power supply electrode and an observation electrode respectively. The industrial personal computer controls the constant current multipath transmitter to transmit currents of the same nature to the bucking electrode and the power supply electrode so as to enable currents of the power supply electrode to almost point to the front of a tunneling face under the action of the bucking electrode. Scanning data collection is conducted by utilizing the observation electrode, and the collected data back feed to the industrial personal computer through the multichannel intelligent receiver. The industrial personal computer controls the multipath electrode automatic translator to change the power supply electrode. Multipath power supply and multipath collection are achieved by the underground construction water burst source advance geology forecast three-dimensional focus induced polarization equipment, directional detection of a tunnel face is achieved, directivity of the currents is good, and the problem of side interference nearby a measuring line is effectively solved so that background interference data are small, forecast accuracy is improved, and detection range is increased.
Owner:山东百廿慧通工程科技有限公司
Magma type copper-nickel ore exploration method
InactiveCN107589472AImprove exploration efficiencyNarrow down the scope of prospectingGeological measurementsMagmaSediment
The invention discloses a magma type copper-nickel ore exploration method. The magma type copper-nickel ore exploration method comprises steps of A, analyzing a geological setting of an ore-forming process of a magma type copper-nickel mineral deposit and summarizing its ore-forming pattern, B, carrying out 1:50000 stream sediment measurement with an aim to observe a geochemical halo on the upperpart of a rock mass, marking abnormities of Cu and Ni, C, performing 1:10000 soil measurement by targeting an area where the Cu and Ni are abnormal, D performing trenching reveal on abnormalities anda mineralized clue or performing 1:2000 geologic measurement, high accuracy magnetic survey, induced polarization sounding and rock comprehensive profile measurement and revealing through trenching engineering, E, marking ore bodies, mineralized bodies and basic and ultra-basic rock bodies, F, using drilling to perform verification on the marked ore bodies or mineralized bodies, and G, determiningthe ore body or the mineral deposit. The magma type copper-nickel ore exploration method can improve a success rate of ore prospecting, can effectively shorten a construction period of ore prospecting and can find various kinds of metal mineral bodies.
Owner:青海省第三地质矿产勘查院
Method and apparatus for modeling a vectorial polarization effect in an optical lithography system
InactiveUS20090070730A1Accurately model polarization effectEnhances a lithography modelPhotomechanical apparatusSpecial data processing applicationsPupilComputational physics
One embodiment of the present invention provides a system that accurately models polarization effects in an optical lithography system for manufacturing integrated circuits. During operation, the system starts by receiving a polarization-description grid map for a lens pupil in the optical lithography system. The system then constructs a pupil-polarization model by defining a vectorial matrix at each grid point in the grid map, wherein the vectorial matrix specifies a pupil-induced polarization effect on an incoming optical field at the grid point. Next, the system enhances a lithography model for the optical lithography system by incorporating the pupil-polarization model into the lithography / OPC model. The system then uses the enhanced lithography model to perform convolutions with circuit patterns on a mask in order to simulate optical lithography pattern printing.
Owner:SYNOPSYS INC
Segmented-centralized-type high-density electrical method measurement system and application thereof
ActiveCN103543472AFew tapsReduce weightElectric/magnetic detectionAcoustic wave reradiationHigh densityEngineering
Owner:ST GEOMATIVE CO LTD
Advanced-prediction observation system while drilling
InactiveCN102156301AAchieve contrastEasy to compareElectric/magnetic detection for well-loggingAcoustic wave reradiationEngineeringObservation system
The invention discloses an advanced-prediction observation system while drilling, and is characterized in that: a power supply electrode is arranged at the bottom of a bored well; a measurement electrode group is arranged above the power supply electrode in the bored well; a remote reference electrode and the power supply electrode are connected with an electrical instrument respectively via a cable; the measurement electrode group is connected with the electrical instrument via a measurement cable and an electrode conversion switch; and an apparent resistivity calculating unit or an induced polarization amplitude frequency calculating unit is arranged in the electrical instrument. The advanced-prediction observation system while drilling is high in detection accuracy, simple in operationand construction, low in measuring cost, and has good application value.
Owner:CENT SOUTH UNIV
Method for determining pore structure and in-place permeability utilizing induced polarization spectrum of rock
InactiveCN1570670AGood correlationImprove permeabilityElectric/magnetic detection for well-loggingTime spectrumCapillary pressure
This invention relates to a method for determine the zone permeability and pore structures by use of rock induced polarization and it solves the problem of single parameter and complicated influence factors in current induced polarization method. Its characteristics are the following: first to supply electricity to control units through constant-current source to generate polarization field in rock core then to cut off electricity. The polarization field fading with time and through measuring fading electric potential to obtain the induced polarization fading spectrum, and to obtain relaxing time spectrum by multiple exponential decline match of fading spectrum. And it can quantitatively descript zone capillary pressure and pore space structure. And it can calculate permeability by combining pore space materials with relaxing time geometrical mean and is characterized by high permeability accuracy and on-spot accessing.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1
Three-dimensional numeral simulation method based on arbitrary dipole-dipole device for direct-current induced polarization method
ActiveCN107742015AVector measurement method is validImprove calculation accuracyDesign optimisation/simulationSpecial data processing applicationsMeasurement pointPolarizability
The invention discloses a three-dimensional numeral simulation method based on an arbitrary dipole-dipole device for a direct-current induced polarization method. The three-dimensional numeral simulation method includes the steps of adopting a three-dimensional direct-current induced polarization arbitrary dipole-dipole device to carry out all-region observation and parameter measurement; calculating a specific resistance model of a normalized background electric field of actually measured data; calculating the normalized transmission functions of the specific resistance and polarizability ofthe actually measured data; calculating the normalized transmission functions of the specific resistance and polarizability of a theoretical model. According to the method, under complex conditions, all-region observation of three-dimensional numeral simulation of the three-dimensional direct-current induced polarization arbitrary dipole-dipole device can be achieved without limitation of null lines of an electric field, the distribution of electrodes is flexible, and as for an important exploring area, the density of measurement points can be enhanced freely, the method is capable of adaptingto exploration in a complex environment; more abundant three-dimensional information of an underground target body can be obtained, and preparation conditions can be provided for inversion imaging ofeach anisotropic medium; the method has the advantages of being big in morphological difference, abundant in polarization information, high in resolution ratio, and capable of effectively improving the calculation accuracy of numeral simulation.
Owner:CENT SOUTH UNIV
Network tunnel real time continuous leading preinforming method and device
InactiveCN1904644AImprove continuityAchieve forecastElectric/magnetic detectionAcoustic wave reradiationElectrical polarityEngineering
The invention discloses a latticing tunnel real time continuously leading forecasting method and the device. It includes the following steps: adopting metal component locating outside tunnel, on tunnel inner wall or working face field to arrange infinite distance measuring electrode B, shield electrode A1 and main electrode A0, and using cable to connect host computer at locality; the host computer emitting homopolarity impulse current of different voltage and receiving electric signal of main electrode, after processing and A / D covert, the digital signal would be input to CPU of host computer; the CPU testing apparent resistivity and apparent induced polarization ratio of the target object; comparing the tested apparent resistivity and apparent induced polarization ratio with the preset value range, the target object would be identified and displayed and alarming.
Owner:WUHAN CHANGSHENG ENG EXPLORATION TECH DEV CO LTD
Underwater main control and data collection system of marine double-frequency induced polarization instrument
InactiveCN102508302ARealize acquisitionRealize measurementProgramme controlComputer controlMicrocontrollerData acquisition
The invention relates to an underwater main control and data collection system of a marine double-frequency induced polarization instrument, which comprises a power management unit, a single chip machine main control unit, a data collection unit, a real-time monitoring unit and a communication unit, wherein the single chip machine main control unit is the core of a whole underwater system and controls the power supplement to modules and devices through the power management unit, so as to control the time sequence when each device starts to work; under the domination of the signal chip machinemain control unit, the data collection unit is used for collecting double-frequency induced polarization signals and the real-time monitoring unit is used for collecting underwater environment information; the obtained data is sent to a water deck machine; the communication unit is responsible for transferring data and commands of the units. The underwater main control and data collection system of the marine double-frequency induced polarization instrument has a certain intelligent control ability and can realize underwater information collection and measuring under hostile marine environment of high pressure, low temperature, undercurrent and the like; the application range includes the exploration of various marine geologic structures, exploration of submarine mineral resources, ocean scientific research and environment monitoring, underwater camera shooting and many underwater information collection areas.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Electric field restraining method coal safety type fully-mechanized excavating onboard geological structure detection system and method thereof
InactiveCN103176214ASolve the geological conditions behind the susceptible excavation faceResolve interferenceElectric/magnetic detectionAcoustic wave reradiationAbnormal positionsEngineering
The invention relates to an electric field restraining method coal safety type fully-mechanized excavating onboard geological structure detection system and a method thereof. The fully-mechanized excavating onboard geological structure detection system is used for detecting the hidden geological structure in front of a tunneling surface under a coal mine and is composed of a coal road fully-mechanized excavating ahead detector, an emission electrode, a restraining electrode and a grounding electrode. Double-frequency modulating wave current is emitted to an area to be detected through the emission electrode and the restraining electrode so as to generate induced polarization effect in coal rock. Polarization information is collected and processed by a receiving part of the detector, apparent resistivity and visual width frequency, namely power feeding equipment (PFE) values, can be automatically calculated and converted into coordinate graphs for display, accordingly, the ahead tunneling geological structure can be judged, and the abnormal positions can be determined by angle scanning and depth scanning. Detection data can be automatically stored and be further analyzed through special data interpretation software, the ahead tunneling geological structure can be obtained, and advanced detection of the fully-mechanized excavating surface of a coal road can be finished. The electric field restraining method coal safety type fully-mechanized excavating onboard geological structure detection system and the method thereof are in accordance with coal safety verification standards, can be in cooperative work with a heading machine and is fast in detection, high in accuracy, good in instantaneity and convenient to operate.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Process and device for measurement of spectral induced polarization response using pseudo random binary sequence (PRBS) current source
InactiveUS20100102822A1Improve signal-to-noise ratioEven power distributionElectric/magnetic detectionAcoustic wave reradiationSpectral induced polarisationBand II
A process and device for measurement of spectral induced polarization response of subsurface over a wide band of frequencies (0.03 Hz to 100 Hz) using pseudo noise current source, is provided. (Pseudo Random Binary Sequence current source). The measurement setup employs a current source (500 VA) and a computer controlled real time correlator for excitation of the subsurface. The current from the source is reversed through the grounded electrodes in a Pseudo Random Binary Sequence (PRBS) and the computer based receiver essentially computes Auto (input-input) and Cross (input-output) correlation estimates in the field. The collected data (time series) is transformed into frequency domain (DFT) in order to obtain the phase spectrum. The receiver has a provision to stack data for an improved S / N ratio. Measurements taken in laboratory using simple RC network, which simulates the subsurface, are accurate. Accuracy of measurement is better than 2% in Band-I (0.031-2 Hz) and 1% in Band-II (2-100 Hz) respectively.
Owner:COUNCIL OF SCI & IND RES
Double-frequency induced polarization method water tank physical simulation experiment device
InactiveCN101881837AGuidance is sensitive and more reliableHigh precisionElectric/magnetic detectionAcoustic wave reradiationElectricityEngineering
The invention relates to a double-frequency induced polarization method water tank physical simulation experiment device which comprises a guide rail platform, a pulley block, a vertical bracket, a leveling instrument, an emission electrode, a receiving electrode, a movable hand wheel, a lifting hand wheel and a water tank, wherein the guide rail platform is a guide rail pair formed by two long guide rails, a bottom plate and a sliding block; the guide rail platform is provided with the leveling instrument, the movable hand wheel, a synchronous belt wheel and a synchronous belt; the two ends of the guide rails are fixed on the water tank; the vertical bracket is provided with a guide sleeve; two vertical rods of an experiment frame pass through a central hole of the guide sleeve; the vertical bracket is provided with the pulley block, flat belts, the lifting hand wheel, a balance weight shaft and a roll spring steel belt; one end of the two flat belts is fixed on a cross rod in the middle of the experiment frame; an electrode is installed in a hole at the lower transverse side of the experiment frame; the movable hand wheel is rotated to drive the experiment frame to horizontally move; and the lifting hand wheel is rotated to drive the experiment frame to be vertically lifted. The double-frequency induced polarization method water tank physical simulation experiment device can simulate marine environment in the water tank, and can measure the activation rate, the electrical resistivity profile and electric depth of ore by adopting a double-frequency induced polarization method.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Underground construction surrounding rock disaster whole time interval induced polarization monitoring method
InactiveCN103267977AHigh degree of automationNo damageMining devicesElectric/magnetic detectionAcousto-opticsPolarizability
The invention provides an underground construction surrounding rock disaster whole time interval induced polarization monitoring method, and belongs to the technical field of mining industry and geotechnical engineering security detection and monitoring. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method relates to a power supply electrode (1), a measuring electrode (2), a digital direct current induced polarization instrument (3), a main control computer (4) and an acousto-optic warning device (5). The power supply electrode (1) and the measuring electrode (2) are respectively connected with the digital direct current induced polarization instrument (3) through connecting wires, the digital direct current induced polarization instrument (3) is mutually communicated with the main control computer (4), the main control computer (4) is communicated with the acousto-optic warning device (5), the power supply electrode (1) and the measuring electrode (2) are arranged in an underground construction roadway or a tunnel surrounding rock monitoring region, and the digital direct current induced polarization instrument (3) and the main control computer (4) record and analyze monitored polarizability of the underground construction roadway or a tunnel surrounding rock in interval time periods in real time. The underground construction surrounding rock disaster whole time interval induced polarization monitoring method has the advantages of being large in monitoring range, high in safety, damage-free, real-time and reliable in monitored data, and capable of early warning in a grading mode.
Owner:SHANDONG UNIV OF TECH
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