CN209979867U - Three-dimensional direct current data acquisition device - Google Patents

Abstract

The utility model relates to a three-dimensional direct current data acquisition device, including receiving and dispatching host computer, the device of annotating the electricity, the transmitting wire of the device of annotating the electricity links to each other transmitting electrode A, B utmost point and receiving and dispatching host computer, and power supply unit is connected to the receiving and dispatching host computer, and in addition, set up wireless local area network to guarantee can be with whole work area whole covers, place the electric potential caliber on each measuring point, will survey the wire on the line, the electric potential caliber is connected with receiving electrode, adopt a public wire to connect wire on the survey line is whole. The utility model discloses can reduce the three-dimensional direct current and arrange and drag the work load of heavy cable when gathering, use the relation of electric potential and potential difference ingeniously, increase the adaptability of three-dimensional direct current method. The method can effectively solve the problem of three-dimensional direct current data acquisition in a complex geological environment, is beneficial to improving the acquisition efficiency, shortens the required construction period and reduces the economic consumption.

Description

Three-dimensional direct current data acquisition device

Technical Field

The utility model belongs to the technical field of three-dimensional direct current sounding technique and specifically relates to a three-dimensional direct current data acquisition device.

Background

Materials are not uniformly distributed in nature, and almost all geological formations are anisotropic in formation, especially for large metal ores formed by geological evolution. At present, the problem can be effectively solved by adopting a geophysical method, wherein the electrical exploration in the geophysical exploration method is very mature in the aspect of detecting geological problems with large difference of electrical conductivity. The electrical prospecting relates to a plurality of types, can be divided into conventional, one-dimensional and two-dimensional electrical prospecting according to a pole distribution mode, has basically the same principle, and analyzes the electrical difference between a target geological abnormal body and surrounding rocks. The direct current method is characterized in that the resistivity of an underground medium is used as a physical parameter, a pair of transmitting electrodes is used for supplying stable current to the underground, so that a stable current field is established in an underground non-uniform half space, then the potential difference at the position is measured through the other pair of measuring electrodes, and finally an observed value is analyzed and the distribution rule of the artificially established underground current field is researched to achieve the purpose of solving the geological problem.

However, the conventional one-dimensional and two-dimensional electrical prospecting methods have certain limitations along with the increase of target depth and the complication of geological conditions, and mainly in the aspects of explaining complex geological problems and refining shallow layer detection, the requirements of practical application are far from being met. In order to effectively improve the field adaptability and reduce the economic cost brought by actual measurement, three-dimensional electrical prospecting needs to be carried out in areas with complex geological conditions.

In the conventional direct current acquisition system, as shown in fig. 1, a host issues all commands, and the acquisition work of a work area is completed under a data anti-interference transmitter. However, when moving to the next alignment after the data acquisition of one alignment is completed, the received cables must be reconnected, which doubles the workload in practical use and is uneconomical. The main content of direct current acquisition is potential difference, and according to the definition of potential difference (also called voltage), the potential difference is the difference of potential between two points, and the potential is a relative quantity, so that the potential difference of any two points can be obtained as long as the potentials of all observation points under one arrangement are obtained. A wire is connected with all the observation points, the potential is on a horizontal plane, and the potential of the measurement point is measured by a potential measurer covered by a wireless network on the observation points, so that the working link is greatly optimized.

Three-dimensional electrical prospecting development to date, there is no one-dimensional or two-dimensional electrical prospecting maturity in methods, techniques and practice applications, and it is still a subject to be researched urgently, and there are two main reasons: first, advanced instrument acquisition and processing systems are required to acquire and process regional three-dimensional data, which consumes more labor and material resources and increases exploration cost. Secondly, theoretical research, development and development of a three-dimensional electric forward and backward modeling method are still in the perfection period, and the three-dimensional electric forward and backward modeling method is difficult to be applied to the three-dimensional large-amount electric data calculation requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-dimensional direct current data acquisition device in order to solve the defect that prior art exists.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

the utility model provides a three-dimensional direct current data acquisition device, includes the receiving and dispatching host computer, the device of annotating the electric energy, the transmission wire of the device of annotating the electric energy links to each other transmitting electrode A, B utmost point with the receiving and dispatching host computer, and the receiving and dispatching host computer is connected power supply unit, in addition, sets up wireless local area network to guarantee to cover whole work area is whole, place the electric potential caliber on each measuring point, be connected wire, electric potential caliber and receiving electrode on the survey line, adopt a public wire to connect wire on the survey line is whole.

Further, two power supply electrodes A, B are used for supplying power for direct current prospecting, and two measuring electrodes M, N are used for measuring the potential difference, wherein the emission current at the power supply end is I_ABThen a stable electric field is established in a uniform half-space of subsurface resistivity p by measuring M, N the potential difference U between_MNThe apparent resistivity value is obtained by utilizing the one-to-one correspondence of the potential difference and the apparent resistivity, the potential of which at the M, N measuring point is,

the potential difference between M, N is then,

namely, it is

In the formula, AM and AN represent horizontal distances from point a to point M, N, respectively, and BM and BN represent horizontal distances from point B to point M, N, respectively.

Further, the apparent resistivity is obtained through the measured potential difference, and the comprehensive reaction of the underground electrical inhomogeneity on the measuring line is obtained.

The utility model has the advantages that: the utility model discloses can reduce the three-dimensional direct current and arrange and drag the work load of heavy cable when gathering, use the relation of electric potential and potential difference ingeniously, increase the adaptability of three-dimensional direct current method. The method can effectively solve the problem of three-dimensional direct current data acquisition in a complex geological environment, is beneficial to improving the acquisition efficiency, shortens the required construction period and reduces the economic consumption.

Drawings

FIG. 1 is a schematic diagram of a two-dimensional DC current collecting device in the background art;

FIG. 2 is a schematic diagram of a three-dimensional DC current acquisition principle;

fig. 3 is a schematic diagram of a three-dimensional direct current field data acquisition device.

Detailed Description

As shown in fig. 3, a three-dimensional dc data acquisition device includes a transceiver 1 and a power injector 2, wherein a transmitting wire of the power injector 2 connects a transmitting electrode A, B with the transceiver 1, the transceiver 1 is connected with a power supply device 4, and the transmitting wire must be stable and safe during power supply. On the other hand, a wireless local area network is arranged and can ensure that the whole work area can be completely covered, an electric potential measurer 3 is placed on each measuring point, the lead on the measuring line, the electric potential measurer 3 and the receiving electrode are connected, and the lead on the measuring line is completely connected by adopting a common lead. All wires must be confirmed to be unbroken when the acquisition system is deployed; when the potential measurer is arranged to be connected with the electrodes, whether the connection is normal or not can be detected in pairs under the condition of connecting a local area network, and if the resistance is too high, saline water is properly poured to reduce the resistance. When power is supplied for collection, each electric potential measurer records the electric potential collected at the time. In a arranging and collecting process, arranging the electrode on the next measuring line along the moving direction of the electrode; after one arrangement collection is completed, only the lateral wires in the opposite direction of the electrodes are required to be disconnected with the common wire, and the lateral wires arranged in the positive direction of the electrodes are connected, so that the time required by each arrangement and collection is greatly reduced, and the working efficiency of direct current three-dimensional collection is improved.

The utility model discloses deep method of direct current measurement's rationale is: using two power supply electrodes A, B for supplying power for direct current prospecting and two measuring electrodes M, N for measuring potential difference, the emission current at power supply end is I_ABThen a stable electric field is established in a uniform half-space of subsurface resistivity p by measuring M, N the potential difference U between_MNThe apparent resistivity value can be obtained by utilizing the one-to-one correspondence relationship between the potential difference and the apparent resistivity (as shown in figure 2). The potential at its point of measurement M, N is,

the potential difference between M, N is then,

namely, it is

In the formula, AM and AN represent horizontal distances from point a to point M, N, respectively, and BM and BN represent horizontal distances from point B to point M, N, respectively. The above formula is an equation in which the potential difference and the apparent resistivity are in one-to-one correspondence, and the apparent resistivity is obtained by measuring the potential difference, so that the structural characteristics of the underground electrical inhomogeneity in the measurement area can be obtained.

The workload of dragging a heavy cable during three-dimensional direct current arrangement and collection can be reduced, the relation between the electric potential and the electric potential difference is used skillfully, and the applicability of the three-dimensional direct current method is improved. The method can effectively solve the problem of three-dimensional direct current data acquisition in a complex geological environment, is beneficial to improving the acquisition efficiency, shortens the required construction period and reduces the economic consumption.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. The utility model provides a three-dimensional direct current data acquisition device, its characterized in that includes the host computer of receiving and dispatching, and the device is annotated to the notes electric installation's transmitting wire links to each other transmitting electrode A, B utmost point with the host computer of receiving and dispatching, and the host computer of receiving and dispatching connects power supply unit, in addition, sets up wireless local area network to guarantee to can all cover whole workplace, place the potentiometric caliber on every measuring point, will survey the wire on the line, potentiometric caliber and receiving electrode and be connected, adopt a public wire to survey the wire on the line and all connect together.

2. The apparatus of claim 1, wherein the two power supply electrodes A, B are used for supplying power for DC prospecting, and the two measuring electrodes M, N are used for measuring potential difference, and the emission current at the power supply end is I_ABThen a stable electric field is established in a uniform half-space of subsurface resistivity p by measuring M, N the potential difference U between_MNThe apparent resistivity value is obtained by utilizing the one-to-one correspondence of the potential difference and the apparent resistivity, the potential of which at the M, N measuring point is,

the potential difference between M, N is then,

namely, it is

In the formula, AM and AN represent horizontal distances from point a to point M, N, respectively, and BM and BN represent horizontal distances from point B to point M, N, respectively.

3. The apparatus of claim 1, wherein the apparent resistivity is determined from the measured potential difference to obtain structural characteristics of the subsurface electrical inhomogeneities in the survey area.

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