CN117031552B - Resistivity tomography measuring system and method based on multichannel electrode design - Google Patents
Resistivity tomography measuring system and method based on multichannel electrode design Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000003325 tomography Methods 0.000 title claims abstract description 16
- 238000013461 design Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 238000010291 electrical method Methods 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims description 36
- 238000009413 insulation Methods 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 9
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000009933 burial Methods 0.000 description 5
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention relates to the technical field of detection of a high-density electrical method, in particular to a resistivity tomography measuring system based on a multichannel electrode design and a method thereof. The invention improves the richness of the ground electric information measured by the high-density electric method, improves the signal to noise ratio of measured data, improves the effective depth of measurement, and expands the application range and application scene of the high-density electric method.
Description
Technical Field
The invention relates to the technical field of detection of a high-density electrical method, in particular to a resistivity tomography measuring system and a resistivity tomography measuring method based on a multichannel electrode design.
Background
The high-density apparent resistivity method is an array exploration method, which is based on the difference of rock and soil conductivity to research the distribution rule of conductive current in the ground under the action of manually applying a stable current field. When in field measurement, only tens to hundreds of electrodes are placed on each measuring point of an observation section, and then the program-controlled electrode conversion device and the micro-engineering electric measuring instrument are utilized to realize rapid and automatic data acquisition.
The traditional high-density electric method is mainly used in the market at present, the detection equipment mainly comprises a cable, electrodes and a high-density electric method measuring instrument, only the electric potentials of two detection electrodes on the same plane are detected when detection is carried out, the obtained electric information is limited, and the data signal-to-noise ratio obtained by detection is low due to the fact that the burial depth of the detection electrodes is shallow, and the resolution of deep geological information is low.
The detection method used at present is that each electrode is used as a detection electrode, potential information on the same depth is detected each time, and for areas with complex geological conditions and areas with deeper detection depth requirements, resolution is insufficient and anisotropic characteristics of resistivity cannot be reflected.
Disclosure of Invention
The invention aims to provide a resistivity tomography measuring system and a resistivity tomography measuring method based on a multichannel electrode design, which are used for solving the problems that in the prior art, each electrode is used as a detection electrode, potential information on the same depth is detected each time, and for a region with complex geological conditions and a region with deeper requirements on detection depth, resolution is insufficient and anisotropic characteristics of resistivity cannot be reflected.
In order to achieve the above purpose, the present invention provides the following technical solutions: the resistivity tomography measuring system based on the multichannel electrode design comprises a high-density electrical measuring instrument, a plurality of measuring wires and a plurality of multichannel electrodes, wherein the high-density electrical measuring instrument is electrically connected with the multichannel electrodes through the measuring wires;
The multichannel electrode includes initiating terminal, earthing device, measurement section and tail end, the initiating terminal includes wiring mouth, interface male port, a plurality of fixed orifices and insulating stay tube, the insulating stay tube includes four insulating bracing pieces, four insulating bracing piece's one end integrated into one piece sets up, four insulating bracing piece's the other end is mutually unconnected, and is a plurality of the fixed orifices is seted up respectively in insulating bracing piece and earthing device, the measurement section is including seting up the wiring hole in insulating stay tube and earthing device, the measurement wire is pegged graft with the wiring hole, the tail end includes two detachable electrode holders and metal drill bit, detachable electrode holders and insulating bracing piece threaded connection, metal drill bit and detachable electrode holder fixed connection.
Preferably, the grounding device comprises a metal base, a plurality of butt joint grooves, a plurality of barbs and a plurality of elastic pieces, wherein the butt joint grooves are formed in the surface of the metal base, the insulating support rods are connected with the butt joint grooves in a sliding mode, the fixing holes are formed in the butt joint grooves, the barbs are rotationally connected to the outer side of the metal base, one ends of the elastic pieces are fixedly connected with the outer side of the metal base, and the other ends of the elastic pieces are fixedly connected with the barbs.
Preferably, a threaded through hole is formed in the fixing hole, a positioning bolt is connected with the metal base in a threaded mode, the positioning bolt is connected with the threaded through hole in a threaded mode, and the metal base is fixedly connected with the insulation supporting rod through the positioning bolt.
Preferably, the electric connector further comprises a converter, a plurality of interface female ports, a shorting stub and a connecting port, wherein the conductive plate is fixedly connected in the converter, the interface female ports are fixedly connected inside the converter, the interface female ports and the shorting stub are electrically connected with the conductive plate, and the connecting port is electrically connected with the shorting stub.
Preferably, the inside internal thread that all is equipped with in the both ends of insulating bracing piece, be equipped with in the removable electrode tip with internal thread looks adaptation's external screw thread, removable electrode tip passes through external screw thread and the internal thread threaded connection of insulating bracing piece.
A method of resistivity tomography measurement system based on a multi-channel electrode design, comprising the steps of:
step one: determining the detection depth, the position of the measuring lines and the number of the measuring lines according to the requirements of the detection range;
step two: determining the number of measuring points on one electrode and the distance between the measuring points according to the detection depth, assembling the multichannel electrode, adjusting the multichannel electrode to a required shape, inserting the multichannel electrode into each detection position, and connecting a high-density electrical measuring instrument, a power supply and the multichannel electrode;
Step three: setting a resistivity threshold value at the interface of the high-density electrical method measuring instrument, checking the grounding resistance of each electrode, if the grounding resistance is larger than the threshold value, indicating that the electrode is not connected or the grounding resistance is overlarge, injecting saline water between the electrode and the ground to reduce the grounding resistance in order to avoid poor quality of measured data, and starting measurement after the checking is passed;
Step four: measuring potential data from a starting point, obtaining a plurality of groups of potential data after each measurement is completed, obtaining a plurality of groups of apparent resistivities in different directions through potential differences between different detection points and corresponding device coefficients, and forming a plurality of complete detection sections through inversion software after the plurality of groups of apparent resistivities are obtained;
Step five: after the measurement of one measuring line is completed, the device is disassembled, the device is moved to the next measuring line according to the measuring line arrangement scheme determined in the first step, the second step, the third step and the fourth step are repeated, and all the components are decomposed after the measurement is completed, and are tidied and retracted.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, steel bars used in the traditional high-density electric method are replaced by composite metal bars with adjustable length and the number of measuring points, so that the electrode has the capability of being convenient to adjust and carry, the steps of electrode arrangement are simplified, and the application range of the method is enlarged; the invention obtains the apparent resistivity in different directions of multiple groups each time, and the measuring electrodes have deeper burial depths of a plurality of measuring electrodes, has the characteristics of richer, more comprehensive and more accurate measured ground electric information compared with the traditional high-density electric method, can better reflect the characteristics of the region under the complex geological condition, has higher resolution for the region with deeper burial, and has wide application prospect.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a metal base according to the present invention;
FIG. 3 is a schematic diagram of a converter according to the present invention;
FIG. 4 is a schematic diagram of a measurement mode according to the present invention;
fig. 5 is an overall front side block diagram of the present invention.
In the figure: 1. a detachable electrode tip; 2. measuring wires; 3. a wiring port; 4. an insulating support rod; 5. a metal base; 6. a fixing hole; 7. a butt joint groove; 8. a barb; 9. a spring plate; 10. an interface male port; 11. a converter; 12. an interface female port; 13. a shorting bar; 14. a connection port; 15. a metal drill bit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, an embodiment of the present invention is provided:
The resistivity tomography measuring system based on the multichannel electrode design comprises a high-density electrical measuring instrument, a plurality of measuring wires 2 and a plurality of multichannel electrodes, wherein the high-density electrical measuring instrument is electrically connected with the multichannel electrodes through the measuring wires 2;
The multichannel electrode comprises a starting end, a grounding device, a measuring section and a tail end, wherein the starting end comprises a wiring port 3, an interface male port 10, a plurality of fixing holes 6 and an insulating supporting tube, the insulating supporting tube comprises four insulating supporting rods 4, one ends of the four insulating supporting rods 4 are integrally formed and arranged, the other ends of the four insulating supporting rods 4 are not connected with each other, the plurality of fixing holes 6 are respectively arranged in the insulating supporting rods 4 and the grounding device, the measuring section comprises wiring holes arranged in the insulating supporting tube and the grounding device, a measuring wire 2 is inserted into the wiring holes, the tail end comprises two detachable electrode heads 1 and a metal drill bit 15, the detachable electrode heads 1 are in threaded connection with the insulating supporting rods 4, the metal drill bit 15 is fixedly connected with the detachable electrode heads 1, steel drills used in the traditional high-density electric method are replaced by composite metal rods with adjustable lengths and the number of measuring points, namely the multichannel electrode in the technical scheme has the capability of being convenient to adjust and carry, so that the steps of electrode arrangement are simplified, and the using breadth of the method is increased; the application obtains the apparent resistivity in different directions of multiple groups each time, and the measuring electrodes have deeper burial depths of a plurality of measuring electrodes, has the characteristics of richer, more comprehensive and more accurate measured ground electric information compared with the traditional high-density electric method, can better reflect the characteristics of the region under the complex geological condition, has higher resolution for the region with deeper burial, and has wide application prospect.
It should be noted that, in the multi-channel electrode assembly, a proper amount of grounding device is slid into the four insulating support rods 4 through the non-connected ends of the four insulating support rods 4 of the insulating support tube, then the measuring wire 2 is passed through the insulating support rods 4 and the grounding device, and then the detachable electrode tip 1 and the detachable electrode tip 1 with the metal drill bit 15 are screwed into the two ends of the insulating support rods 4 to complete the installation.
Referring to fig. 1, in this embodiment, the grounding device includes a metal base 5, a plurality of docking slots 7, a plurality of barbs 8 and a plurality of elastic pieces 9, the docking slots 7 are formed on the surface of the metal base 5, the insulating support rods 4 are slidably connected with the docking slots 7, the fixing holes 6 are formed in the docking slots 7, the barbs 8 are rotatably connected to the outer sides of the metal base 5, one ends of the elastic pieces 9 are fixedly connected to the outer sides of the metal base 5, the other ends of the elastic pieces 9 are fixedly connected with the barbs 8, a plurality of detection points are formed on one electrode by using a multi-channel electrode instead of the original electrode on the basis of the arrangement of the conventional high-density electrical method, the potentials at a plurality of different positions can be obtained during measurement, and the apparent resistivity in different directions can be obtained after calculating the corresponding device coefficients, so that the obtained electrical structure is richer, more comprehensive and more accurate than the conventional high-density electrical method, the electrical structure characteristics can be better reflected under complex geological conditions, and the resolution of a deep region can be improved;
it should be noted that, during installation, the grounding device may slide into the four insulating support rods 4 through the end portions of the four insulating support rods 4 of the insulating support tube, which are not connected with each other, and the installation of the detachable electrode tip 1 will be performed after the installation of the grounding device is completed, so that the installation of the grounding device is not hindered.
The position of the original tail end where the electrode head is arranged can be selected not to be provided with the detachable electrode head 1, and is additionally connected with a section of measuring end, so that the length of the electrode is increased, whether the electrode head is arranged at two ends of the multichannel electrode can be selected, and the electrode head cannot be arranged at the middle part.
It should be noted that, on the basis of the arrangement of the steel bars or electrodes of the traditional high-density electric method, the steel bars or electrodes used by the traditional high-density electric method are changed into multichannel electrodes with adjustable length of the steel bars or electrodes and the number of potential measurement points, on the basis of the traditional method, two or more groups of potential measurement points are arranged below the detection electrodes, and when in measurement, multiple groups of apparent resistivities in different directions can be obtained.
The fixed orifices 6 are internally provided with threaded through holes, the metal base 5 is internally connected with positioning bolts, the positioning bolts are in threaded connection with the threaded through holes, the metal base 5 is in fastening connection with the insulating support rods 4 through the positioning bolts, the bolts are screwed into the fixed orifices 6 at corresponding positions between the metal base 5 and the insulating support rods 4, the metal base 5 is fixed at the positions inside the insulating support rods 4, the electric conduction plate is fixedly connected in the converter 11, the plurality of interface female ports 12 are fixedly connected inside the converter 11, the interface female ports 12 and the shorting bars 13 are electrically connected with the conducting plate, the connecting ports 14 are electrically connected with the shorting bars 13, the multi-channel electrode is electrically connected with the high-density electric meter through the insertion connection between the interface female ports 12 and the interface male ports 10, the inner threads are arranged inside the two ends of the insulating support rods 4, the detachable electrode head 1 is internally provided with external threads matched with the internal threads, the detachable electrode head 1 is detachably connected with the insulating support rods 4 through the internal threads of the external threads, and the detachable electrode head 1 is detachably connected with the insulating support rods 4 through the internal threads, and the detachable electrode head 1 is detachably arranged with the detachable electrode head 1 through the internal threads and the external threads.
A method of resistivity tomography measurement system based on a multi-channel electrode design, comprising the steps of:
step one: determining the detection depth, the position of the measuring lines and the number of the measuring lines according to the requirements of the detection range;
Step two: determining the number of measuring points on one electrode and the distance between the measuring points according to the detection depth, assembling the multichannel electrode, adjusting the multichannel electrode to a required shape, inserting the multichannel electrode into each detection position, and connecting a high-density electrical measuring instrument, a power supply and the multichannel electrode;
Step three: setting a resistivity threshold value at the interface of the high-density electrical method measuring instrument, checking the grounding resistance of each electrode, if the grounding resistance is larger than the threshold value, indicating that the electrode is not connected or the grounding resistance is overlarge, injecting saline water between the electrode and the ground to reduce the grounding resistance in order to avoid poor quality of measured data, and starting measurement after the checking is passed;
Step four: measuring potential data from a starting point, obtaining a plurality of groups of potential data after each measurement is completed, obtaining a plurality of groups of apparent resistivities in different directions through potential differences between different detection points and corresponding device coefficients, and forming a plurality of complete detection sections through inversion software after the plurality of groups of apparent resistivities are obtained;
Step five: after the measurement of one measuring line is completed, the device is disassembled, the device is moved to the next measuring line according to the measuring line arrangement scheme determined in the first step, the second step, the third step and the fourth step are repeated, and all the components are decomposed after the measurement is completed, and are tidied and retracted.
It should be noted that, the measuring section is the middle part of the multichannel electrode, responsible for installing the grounding device, play the role of grounding and measurement, the tail end is responsible for installing the electrode head, and reduce the work load in the electrode buries into the soil through the metal drill bit 15, the measuring section is the part of installing the grounding device, can install several grounding devices on the measuring section, the position of installing the grounding device can be regarded as a measuring point, the ground resistance of each electrode is checked, there is relevant option on the high-density electrical measuring instrument, the upper limit of resistivity when measuring can be selected, once the resistivity in the position exceeds this upper limit, the measurement can be stopped and the error report can be made, the resistivity of each point can be tested before formal measurement, thereby guaranteeing the smoothness of current and the reliability of data, resistivity inversion software needs to be used to obtain the resistivity profile after obtaining a plurality of sets of potential data, and the number of electrodes and the number of wires are limited in actual measurement, often can not be measured once, the connection of only a part can be untied according to the detection requirement, namely, the interface male port 10 is pulled out from the interface, the interface is moved from the interface port 12, the tail end is moved through the measuring section, the whole distance is reduced, the number of the measuring section is inserted into the measuring section through the measuring device, the whole measuring device is reduced, the distance is convenient for the measurement is reduced, the number of the whole measuring section is inserted into the soil, and the measuring section is inserted into the measuring section, and the measuring section is installed.
Referring to fig. 4, in actual measurement, the multi-channel electrodes are assembled according to the requirement and connected in sequence to form a measuring line, and the measuring line has the characteristics of richer measured ground electric information, higher signal-to-noise ratio and deeper effective detection depth.
The high-density electrical method measurement principle of the invention is as follows: the measuring array supplies power to the underground, and the high-density electrical measuring instrument measures the apparent resistivity of the corresponding area, and an inverted triangle-shaped apparent resistivity data array is formed in each measurement. The apparent resistivity can be processed to form an underground apparent resistivity profile, and the underground object is judged according to the apparent resistivity profile. The measuring method provided by the invention uses multichannel electrodes on the basis of the electrodes arranged in the traditional method, two groups of detection electrodes are additionally added below each detection electrode, a plurality of potentials at different positions are obtained through each measurement, a plurality of potential differences in different directions are obtained after difference is made, and the richness and resolution of measured data are improved.
In practical use, this embodiment includes the following considerations: the grounding resistance of each measuring point is not more than a threshold value, and the grounding resistance can be reduced by irrigating saline water; the application area should not be set on a road surface with hardening, the electrode cannot be inserted and the ground resistance is too high; the number and the distance between the measuring points on the same electrode are determined according to the detected depth and the detected precision, so that the workload is reduced, and the data precision is improved; when the apparent resistivity is calculated, the fluctuation of the device coefficient is noted, and the incorrect apparent resistivity is avoided; the power supply must use direct current.
Working principle: determining the detection depth, the position of the measuring lines and the number of the measuring lines according to the requirements of the detection range; according to the detection depth, determining the number of measurement points on one electrode and the distance between the measurement points, assembling the multichannel electrode, adjusting the multichannel electrode to a required shape, namely, sliding a proper amount of grounding device into the four insulated support rods 4 through the end parts of the insulated support rods 4 which are not connected with each other, then enabling a measurement lead 2 to pass through the insulated support rods 4 and the grounding device, installing the detachable electrode head 1 and the two ends of the detachable electrode head 1 with a metal drill bit 15 in a threaded connection manner, and then enabling the metal base 5 to be fixed at the position inside the insulated support rods 4 by screwing bolts into the fixed holes 6 at the corresponding positions between the metal base 5 and the insulated support rods 4, inserting the multichannel electrode into each detection position, and connecting the high-density electric measuring instrument, a power supply and the multichannel electrode, namely, enabling the high-density electric measuring instrument to be electrically connected with the connecting ports 14, and enabling the high-density electric measuring instrument to be electrically connected with the multichannel electrode through the connecting ports 14, the shorting lines 13, the converters 11, the interface female ports 12, the interface male ports 10 and the measurement lead 2 which are sequentially connected; setting a resistivity threshold value at the interface of the high-density electrical method measuring instrument, checking the grounding resistance of each electrode, if the grounding resistance is larger than the threshold value, indicating that the electrode is not connected or the grounding resistance is overlarge, injecting saline water between the electrode and the ground to reduce the grounding resistance in order to avoid poor quality of measured data, and starting measurement after the checking is passed; measuring potential data from a starting point, obtaining a plurality of groups of potential data after each measurement is completed, obtaining a plurality of groups of apparent resistivities in different directions through potential differences between different detection points and corresponding device coefficients, and forming a plurality of complete detection sections through inversion software after the plurality of groups of apparent resistivities are obtained; after the measurement of one measuring line is completed, the device is disassembled, namely the interface male port 10 is extracted from the interface female port 12, so that the connection of the multichannel electrode and the high-density electric measuring instrument is disconnected, the device is moved to the next measuring line according to the originally determined measuring line arrangement scheme, the multichannel electrode is repeatedly installed in an upper operation, and all components are disassembled and tidied and retracted after all the measurements are completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. The resistivity tomography measuring system based on the multichannel electrode design is characterized by comprising a high-density electrical measuring instrument, a plurality of measuring wires (2) and a plurality of multichannel electrodes, wherein the high-density electrical measuring instrument is electrically connected with the multichannel electrodes through the measuring wires (2);
The multi-channel electrode comprises a starting end, a grounding device, a measuring section and a tail end, wherein the starting end comprises a wiring port (3), an interface male port (10), a plurality of fixing holes (6) and an insulation supporting tube, the insulation supporting tube comprises four insulation supporting rods (4), one ends of the insulation supporting rods (4) are integrally formed, the other ends of the insulation supporting rods (4) are not connected with each other, the fixing holes (6) are respectively arranged in the insulation supporting rods (4) and the grounding device, the measuring section comprises wiring holes arranged in the insulation supporting tube and the grounding device, the measuring wire (2) is spliced with the wiring holes, the tail end comprises two detachable electrode heads (1) and a metal drill bit (15), the detachable electrode heads (1) are in threaded connection with the insulation supporting rods (4), the metal drill bit (15) is fixedly connected with the detachable electrode heads (1), the grounding device comprises a metal base (5), a plurality of butt joint grooves (7), a plurality of barbs (8) and a plurality of elastic pieces (9), the butt joint grooves (7) are respectively arranged in the insulation supporting rods (7) and are arranged on the outer sides of the metal base (5) in the butt joint grooves (7) in a sliding mode, the metal base (7) are fixedly connected with the butt joint grooves (7), one end of the elastic piece (9) is fixedly connected with the outer side of the metal base (5), the other end of the elastic piece (9) is fixedly connected with the barb (8), a threaded through hole is formed in the fixing hole (6), a positioning bolt is connected with the metal base (5) in a threaded mode, the positioning bolt is connected with the threaded through hole in a threaded mode, and the metal base (5) is fixedly connected with the insulating support rod (4) through the positioning bolt.
2. The resistivity tomography measurement system based on the multi-channel electrode design as claimed in claim 1, further comprising a converter (11), a plurality of interface female ports (12), shorting bars (13) and connecting ports (14), wherein a conductive plate is fixedly connected in the converter (11), a plurality of interface female ports (12) are fixedly connected in the converter (11), the interface female ports (12) and the shorting bars (13) are electrically connected with the conductive plate, and the connecting ports (14) are electrically connected with the shorting bars (13).
3. The resistivity tomography measuring system and the resistivity tomography measuring method based on the multi-channel electrode design according to claim 1, wherein internal threads are arranged inside two ends of the insulation supporting rod (4), external threads matched with the internal threads are arranged in the detachable electrode tip (1), and the detachable electrode tip (1) is in threaded connection with the internal threads of the insulation supporting rod (4) through the external threads.
4. A method of implementing a multi-channel electrode design based resistivity tomography measurement system according to any of the claims 1-3, comprising the steps of:
step one: determining the detection depth, the position of the measuring lines and the number of the measuring lines according to the requirements of the detection range;
step two: determining the number of measuring points on one electrode and the distance between the measuring points according to the detection depth, assembling the multichannel electrode, adjusting the multichannel electrode to a required shape, inserting the multichannel electrode into each detection position, and connecting a high-density electrical measuring instrument, a power supply and the multichannel electrode;
Step three: setting a resistivity threshold value at the interface of the high-density electrical method measuring instrument, checking the grounding resistance of each electrode, if the grounding resistance is larger than the threshold value, indicating that the electrode is not connected or the grounding resistance is overlarge, injecting saline water between the electrode and the ground to reduce the grounding resistance in order to avoid poor quality of measured data, and starting measurement after the checking is passed;
Step four: measuring potential data from a starting point, obtaining a plurality of groups of potential data after each measurement is completed, obtaining a plurality of groups of apparent resistivities in different directions through potential differences between different detection points and corresponding device coefficients, and forming a plurality of complete detection sections through inversion software after the plurality of groups of apparent resistivities are obtained;
Step five: after the measurement of one measuring line is completed, the device is disassembled, the device is moved to the next measuring line according to the measuring line arrangement scheme determined in the first step, the second step, the third step and the fourth step are repeated, and all the components are decomposed after the measurement is completed, and are tidied and retracted.
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