CN115453632A

CN115453632A - Electrical prospecting system, method, device and storage medium

Info

Publication number: CN115453632A
Application number: CN202110638826.0A
Authority: CN
Inventors: 张金成; 付大其; 张凤霖; 张天林; 李民; 毕亮亮
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2022-12-09

Abstract

The disclosure provides an electrical prospecting system, method, device, equipment and storage medium, and belongs to the technical field of prospecting. The electrical prospecting system comprises a control device, a transmitter and at least two receivers, each receiver having a plurality of measuring electrodes. On the one hand, the number of the measuring electrodes can be increased by arranging a plurality of receivers, and more geological data can be obtained through a larger number of measuring electrodes. On the other hand, the transmitter starts to transmit the measurement signal at a predetermined transmission time, and each receiver starts to receive the response signal of the measurement signal at a predetermined reception time which is not later than the predetermined transmission time. Each receiver may control the corresponding plurality of measurement electrodes to start receiving the response signal of the measurement signal at the same time as or before the transmitter starts transmitting the measurement signal. The situation that the measuring electrode of the receiver cannot receive the response signal can be reduced, and more geological data can be obtained.

Description

Electrical prospecting system, method, device and storage medium

Technical Field

The present disclosure relates to the field of exploration technologies, and in particular, to an electrical prospecting system, method, device, and storage medium.

Background

The electrical prospecting is a kind of geophysical prospecting method which takes the electrical property difference between underground rocks and ores as the basis and carries out resource prospecting and engineering prospecting by observing and researching the space and time distribution rule of an electric field and an electromagnetic field, thereby realizing the purpose of searching useful mineral resources and solving the geological problems of engineering, environment, disaster and the like.

In the related art, an electrical prospecting system includes a control device, a transmitter, and a receiver including a plurality of measuring electrodes. The transmitter is used for sending a measuring signal to a measured area, the receiver is used for receiving a response signal of the measuring signal after underground transmission through the plurality of measuring electrodes and sending the received response signal to the control equipment, and the control equipment is used for processing the response signal sent by the receiver to obtain geological data such as apparent resistivity.

In the course of implementing the present disclosure, the inventors found that the prior art has at least the following problems:

the number of the measuring electrodes of a single receiver is limited, and there may be a case that a plurality of measuring electrodes of the receiver cannot receive a response signal of the measuring signal, so that less geological data is obtained and the geological condition of the measured area cannot be accurately reflected.

Disclosure of Invention

The embodiment of the disclosure provides an electrical prospecting system, method, device and storage medium, which can obtain more geological data and further accurately reflect the geological condition of a detected region. The technical scheme is as follows:

in a first aspect, there is provided an electrical prospecting system comprising: a control device, a transmitter and at least two receivers; each of the receivers includes a plurality of measurement electrodes; the control device is used for sending a first control command to the transmitter, wherein the first control command is used for instructing the transmitter to start transmitting a measurement signal to the measured area at a preset transmission time; the control device is further configured to send a second control command to each of the receivers, where the second control command is used to instruct each of the receivers to control the corresponding plurality of measurement electrodes to start receiving the response signal of the measurement signal at a predetermined receiving time, where the predetermined receiving time is not later than the predetermined transmitting time; the transmitter is used for transmitting the measuring signal according to the first control command; the receiver is used for controlling the corresponding measuring electrodes to receive response signals of the measuring signals according to the second control command and sending the received response signals to the control equipment.

Optionally, the control device, the transmitter and the receiver each comprise a positioning unit; the control equipment is used for determining the current time through a built-in positioning unit and generating the scheduled transmitting time and the scheduled receiving time according to the current time; the transmitter is used for determining a first time, and starting to transmit the measurement signal according to the first time and the preset transmission time, wherein the first time is real-time UTC time obtained by the transmitter through a built-in positioning unit, or UTC time obtained by the transmitter through the built-in positioning unit when the transmitter receives the first control command; each receiver is configured to determine a second time, and control a corresponding plurality of measurement electrodes to start receiving the response signal according to the second time and the predetermined receiving time, where the second time is a real-time UTC time obtained by each receiver through a built-in positioning unit, or a UTC time obtained by each receiver through a built-in positioning unit when receiving the second control command.

Optionally, each of the receivers is further configured to determine a first receiving time from the time when the corresponding plurality of measuring electrodes start receiving the response signal of the measuring signal, where the first receiving time is the time when a first measuring electrode starts receiving the response signal of the measuring signal, and the first electrical measuring electrode is the measuring electrode which starts receiving the response signal of the measuring signal first among the plurality of measuring electrodes; calculating a receiving time difference of a second measuring electrode according to the first receiving time and a second receiving time, wherein the second receiving time is a time when the second measuring electrode starts to receive a response signal of the measuring signal, and the second measuring electrode is one of a plurality of measuring electrodes except the first measuring electrode; and according to the calculated receiving time difference of the second measuring electrode, performing time compensation on the preset receiving time corresponding to the second measuring electrode.

Optionally, each receiver further includes a channel switching unit, and is further configured to obtain first position parameters of the corresponding plurality of measurement electrodes by controlling the channel switching unit, and send the first position parameters of the plurality of measurement electrodes to the control device; the control equipment is used for calibrating the prestored second position parameters of the plurality of measuring electrodes according to the first position parameters of the plurality of measuring electrodes.

In a second aspect, there is provided a method of electrical prospecting, the method comprising:

the control device sends a first control command to a transmitter and sends a second control command to at least two receivers, wherein the first control command is used for instructing the transmitter to transmit a measurement signal to a measured area at a preset transmission time, and the second control command is used for instructing each receiver to control a corresponding plurality of measurement electrodes to start receiving a response signal of the measurement signal at a preset receiving time which is not later than the preset transmission time; the control device receives a response signal sent by the receiver, the response signal is a response signal of a measurement signal received by the receiver according to the second control command and controlling the corresponding multiple measurement electrodes, and the measurement signal is transmitted by the transmitter according to the first control command.

Optionally, the method further comprises:

the control equipment determines the current time through a built-in positioning unit, and generates the scheduled transmitting time and the scheduled receiving time according to the current time; the transmitter is configured to start transmitting the measurement signal according to the first time and the predetermined transmission time, where the first time is an UTC time obtained by the transmitter through a built-in positioning unit in real time, or an UTC time obtained by the built-in positioning unit when the transmitter receives the first control command; each receiver is configured to control a corresponding plurality of measurement electrodes to start receiving a response signal of the measurement signal according to the second time and the predetermined receiving time, where the second time is a real-time UTC time acquired by each receiver through a built-in positioning unit, or a UTC time acquired by each receiver through a built-in positioning unit when each receiver receives the second control command.

Optionally, the method further comprises:

each receiver determines a first receiving time from the time when the corresponding plurality of measuring electrodes start to receive the response signal of the measuring signal, wherein the first receiving time is the time when a first measuring electrode starts to receive the response signal of the measuring signal, and the first electric measuring electrode is the measuring electrode which starts to receive the response signal of the measuring signal firstly in the plurality of measuring electrodes; calculating a receiving time difference of a second measuring electrode according to the first receiving time and a second receiving time, wherein the second receiving time is a time when the second measuring electrode starts to receive a response signal of the measuring signal, and the second measuring electrode is one of a plurality of measuring electrodes except the first measuring electrode; and according to the calculated receiving time difference of the second measuring electrode, performing time compensation on the preset receiving time corresponding to the second measuring electrode.

Optionally, the method further comprises:

the control equipment receives first position parameters of the corresponding measuring electrodes sent by the receivers; and calibrating the prestored second position parameters of the plurality of measuring electrodes according to the first position parameters of the plurality of measuring electrodes.

In a third aspect, a computer device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the second aspect.

In a fourth aspect, a computer-readable storage medium is provided, wherein instructions, when executed by a processor of a computer device, enable the computer device to perform the method of the second aspect.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

in an embodiment of the disclosure, an electrical prospecting system comprises a control device, a transmitter and at least two receivers, each receiver having a plurality of measuring electrodes. On the one hand, the number of the measuring electrodes can be increased by arranging a plurality of receivers, so that more geological data can be obtained by a larger number of measuring electrodes. On the other hand, the transmitter starts to transmit the measurement signal at a predetermined transmission time, and each receiver starts to receive the response signal of the measurement signal at a predetermined reception time which is not later than the predetermined transmission time. Therefore, each receiver can control the corresponding plurality of measuring electrodes to start receiving the response signals of the measuring signals when the transmitter starts to transmit the measuring signals; alternatively, each receiver may control the corresponding plurality of measuring electrodes to start receiving the response signal of the measuring signal before the transmitter starts transmitting the measuring signal. Therefore, the situation that the response signals of the measuring signals cannot be received by each measuring electrode of the receiver can be reduced, more geological data can be obtained, and the geological condition of the measured area can be accurately reflected through the obtained more geological data.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic diagram of an electrical prospecting system according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of another electrical prospecting system according to embodiments of the present disclosure;

FIG. 3 is a schematic diagram of a time compensation provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a receiver provided in the embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a control device provided in an embodiment of the present disclosure;

FIG. 6 is a flow chart of a method of electrical prospecting as provided by an embodiment of the present disclosure;

fig. 7 is a block diagram of a computer device according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an electrical prospecting system according to an embodiment of the present disclosure. Referring to fig. 1, an electrical prospecting system comprises a control device 10, a transmitter 20 and at least two receivers 30, each receiver 30 having a plurality of measuring electrodes 31.

The plurality of measuring electrodes 31 of the at least two receivers 30 are evenly distributed around the area under test.

In some examples, each measurement electrode 31 is arranged in a circular pattern. For example, a reference point is selected in the measured area, a plurality of measuring electrodes 31 are arranged at intervals on circles 50 meters, 100 meters and 150 meters from the reference point as the center, and on the same circle, the central angle formed by two adjacent measuring electrodes 31 is 5 °. Illustratively, the plurality of measuring electrodes 31 of each receiver 30 are arranged in a circle, or the plurality of measuring electrodes 31 of the plurality of receivers 30 are arranged on the same circle.

In other examples, each measurement electrode 31 is radially disposed. For example, a reference point is selected in the measured area, and a plurality of measuring electrodes 31 are arranged at intervals along a line in three directions of the reference point with the reference point as a center. Illustratively, the distance between the measurement electrodes 31 in the same direction is 5 meters. Illustratively, the plurality of measuring electrodes 31 of one receiver 30 are arranged in one direction of the reference point, or the plurality of measuring electrodes 31 of the plurality of receivers 30 are arranged in the same direction of the reference point.

In still other examples, each measurement electrode 31 is in a grid-like arrangement. For example, a reference point is selected in the area to be measured, any straight line passing through the reference point is taken as a reference line, and a plurality of measuring electrodes 31 are arranged at intervals on a plurality of parallel lines and a plurality of vertical lines of the reference line. The spacing distance between any two adjacent parallel lines, the spacing distance between any two adjacent vertical lines, and the spacing distance between any two adjacent receivers 30 are all equal. Illustratively, a plurality of measuring electrodes 31 of one receiver 30 are arranged on parallel lines or vertical lines of each reference line, or a plurality of measuring electrodes 31 of a plurality of receivers 30 are arranged on parallel lines or vertical lines of each reference line.

The number of the arranged measuring electrodes 31, the spacing distance between the respective measuring electrodes 31, and the like can be adjusted according to the actual topography around the measured area. For example, the measuring electrode 31 is disposed avoiding a river, a puddle, or the like.

By uniformly arranging a plurality of measuring electrodes of a plurality of receivers around the measured area, on one hand, more response signals of the measuring signals can be obtained, and on the other hand, the detection area for receiving the response signals can be increased.

The transmitter 20 may be arranged according to actual needs as long as the plurality of measuring electrodes of each receiver 30 can receive the response signals.

The control device 10 is configured to send a first control command to the transmitter 20, where the first control command is used to instruct the transmitter 20 to start transmitting the measurement signal to the area under test at a predetermined transmission time. The first control command includes transmission time information indicating the predetermined transmission time. Illustratively, the transmission time information includes UTC time or is a set duration.

The transmitter 20 is arranged to transmit the measurement signal in accordance with a first control command.

In some embodiments, the first control command sent by the control device 10 to the transmitter 20 also includes parameter information of the measurement signal. The transmitter 20 may generate a measurement signal according to parameter information of the received measurement signal and start transmitting the measurement signal to the measured area according to the first control command.

In other embodiments, the first control command sent by the control device 10 to the transmitter 20 does not include parameter information of the measurement signal. The transmitter 20 may generate a measurement signal according to parameter information of the measurement signal stored in advance and start to transmit the measurement signal to the measured area according to the first control command.

Illustratively, the measurement signal is a pseudo-random sequence, such as an M-sequence. The parameter information of the pseudo-random sequence includes a pseudo-random sequence polynomial, a symbol length, and the like. The formula of the polynomial of the pseudo-random sequence is as follows:

i is the order of the pseudorandom polynomial. The symbol length is the clock period of the pseudorandom sequence.

Due to the fact that the pseudo-random sequence has the good self-correlation characteristic similar to white noise and the anti-interference capacity, the anti-interference performance of the measuring signal can be improved by adopting the pseudo-random sequence as the measuring signal.

The control device 10 is further configured to send a second control command to each receiver 30, the second control command being configured to instruct each receiver 30 to control a corresponding plurality of measuring electrodes 31 to start receiving a response signal of the measuring signal at a predetermined receiving time. The second control command includes reception time information indicating the predetermined reception time. Illustratively, the transmission Time information includes a Coordinated Universal Time (UTC) Time or a set Time duration. The predetermined reception time is not later than the predetermined transmission time.

The receiver 30 is configured to control the corresponding plurality of measuring electrodes 31 to start receiving the response signal of the measuring signal at a predetermined receiving time according to the second control command, and transmit the received response signal to the control device 10.

In some examples, after acquiring the response signals received by the corresponding measuring electrodes 31, each receiver 30 performs data processing on the multiple response signals to obtain geological data, and then sends the geological data to the control device 10. The control device 10 stores the received geological data in a database.

In other examples, each receiver 30 directly transmits the received plurality of response signals to the control device 10, performs data processing by the control device 10 to obtain geological data, and then stores the geological data in the database.

In embodiments of the present disclosure, the geological data includes apparent resistivity and phase parameters that have geophysical significance.

Illustratively, the process of data processing the response signal includes: and obtaining a pulse transition function through the response signal, and obtaining apparent resistivity and phase parameters through fast Fourier transform and the like.

FIG. 2 is a schematic diagram of another electrical prospecting system according to the disclosed embodiments. As shown in fig. 2, the system includes: a control device 10, a transmitter 20 and at least two receivers 30. Wherein the control device 10, the transmitter 20 and the at least two receivers 30 each comprise a wireless communication unit 40. The transmitter 20 and the plurality of receivers 30 are respectively provided with a controller. The controller 21 of the transmitter 20 communicates with the control device 10 through the wireless communication unit 40 built in the transmitter, and the controller 31 of the receiver 30 communicates with the control device 10 through the wireless communication unit 40 built in the receiver 30.

Compared with wired communication, for example, the control device 10 communicates with the transmission center, and the control device 10 communicates with the at least two receivers 30 through the serial communication module, the wireless communication has the advantages of fast data transmission rate, long data transmission distance, high data transmission reliability, and the like. Illustratively, the wireless communication unit 40 is a 5G communication module.

Optionally, as shown in FIG. 2, the electrical prospecting system further comprises a plurality of positioning units 50, and the control device 10, the transmitter 20 and the at least two receivers 30 each comprise a positioning unit 50. The positioning unit 50 built in the transmitter 20 is connected to the controller 21 of the transmitter 20. The positioning unit 50 built into the receiver 30 is connected to the controller 32 of the receiver 30. Exemplarily, the Positioning unit may be a GPS (Global Positioning System), a BDNS (BeiDou Navigation Satellite System), a GSNS (Galileo Navigation Satellite System), a GNSS (Global Navigation Satellite System), and the like. The positioning unit 50 may output a standard UTC time according to the received position signal.

The control device 10 is configured to determine a current time by the built-in positioning unit 50, and to generate a scheduled transmission time and a scheduled reception time according to the current time. The scheduled transmit time and the scheduled receive time are both later than the current time.

In some examples, the first set duration is added to the current time to obtain the time indicated by the scheduled transmission time information. And adding a second set time length on the basis of the current time to obtain the preset receiving time information. The specific values of the first set time length and the second set time length can be set according to actual needs.

Optionally, the first set duration is greater than or equal to the second set duration. That is, the scheduled receive time is not later than the scheduled transmit time.

The transmitter 20 is configured 50 to determine a first time and to begin transmitting measurement signals based on the first time and a predetermined transmission time. The first time is a real-time UTC time acquired by the transmitter 20 through the built-in positioning unit 50 or a UTC time acquired by the built-in positioning unit 50 when the transmitter 20 receives the first control command.

Alternatively, the transmitter 20 may transmit the measurement signal in two ways:

the first method is as follows:

the first time is the real-time UTC time acquired by the transmitter 20 through the built-in positioning unit 50. The transmitter 20 is configured to compare the currently acquired first time with a predetermined transmission time in the first control command in real time; and when the first time is consistent with the preset transmitting time, starting to transmit the measuring signal to the measured area.

The second method comprises the following steps:

the first time is UTC time acquired by the built-in positioning unit 50 when the transmitter 20 receives the first control command. The transmitter 20 is configured to obtain a first time via the built-in positioning unit 50 in response to receiving the first control command; converting the time type of the first time and the time type of the preset transmitting time in the first control command into a second type, and calculating the time difference taking the second as a time unit; and counting up or down in units of seconds according to the calculated time difference, and starting to transmit a measuring signal to the measured area when the counting value is increased to the value of the time difference or is reduced to 0. For example, if the calculated time difference is 20 seconds, the transmitter 20 starts to count up from 0 in units of seconds, and when the count value increases to 20, the transmitter 20 starts to transmit the measurement signal to the measured area; or counting down from 20 and when the count value is reduced to 0, the transmitter 20 starts to transmit the measurement signal to the measured area. Illustratively, the transmitter 20 may count by a timer of the built-in controller 21.

Each receiver 30 is configured to determine a second time and to control a corresponding plurality of measuring electrodes 31 to receive the response signal according to the second time and a predetermined receiving time. The second time is a real-time UTC time acquired by each receiver 30 through the built-in positioning unit 50 or a UTC time acquired by each receiver 30 through the built-in positioning unit 50 when receiving the second control command.

Alternatively, the receiver 30 may control the corresponding plurality of measuring electrodes 31 to receive the response signals in the following two ways.

The first method is as follows:

the second time is the real-time UTC time acquired by the receiver 30 through the built-in positioning unit 50. The receiver 30 is configured to compare the currently acquired second time with a predetermined receiving time in the second control command in real time; when the second time coincides with the predetermined receiving time, the corresponding plurality of measuring electrodes 31 are controlled to receive the response signal.

The second method comprises the following steps:

the second time is the UTC time acquired by the built-in positioning unit 50 when the receiver 30 receives the second control command. Each receiver 30 is configured to obtain a second time via the built-in positioning unit 50 in response to receiving a second control command; converting the time type of the second time and the time type of the preset receiving time in the second control command into a second type, and calculating the time difference with the second as a time unit; and performing increment or decrement counting according to the calculated time difference, and controlling the corresponding plurality of measuring electrodes 31 to receive the response signal of the measuring signal when the counting value is increased to the value of the time difference or the counting value is decreased to 0. Illustratively, the receiver 30 may count by a built-in timer of the controller 32.

Since the transmitter 20 and the at least two receivers 30 are distributed at different locations in the electrical prospecting system, in order to ensure that the measuring electrode 31 of each receiver 30 can receive the response signal of the measuring signal transmitted by the transmitter 20, it is necessary to control the measuring electrodes 31 of the at least two receivers 30 to start operating synchronously with the transmitter 20, or to control the measuring electrodes 31 of the at least two receivers 30 to start operating before the transmitter 20. By using the accurate UTC time obtained by the positioning unit 50, the transmitter 20 can be controlled to transmit the measurement signal and the measurement electrodes 31 of the multiple receivers 30 can be controlled to receive the response signal of the measurement signal more accurately, thereby reducing the situation that the receivers 30 cannot receive the response signal of the measurement signal to a certain extent. In this way, as much geological data as possible can be obtained.

Optionally, in the embodiment of the present disclosure, each receiver 30 further includes a plurality of sub-controllers, the number of the sub-controllers is the same as the number of the measuring electrodes 31 of the receiver 30, and one sub-controller is correspondingly disposed on one measuring electrode 31. Normally, the controller 32 of the receiver 30 controls the plurality of sub-controllers to turn on the corresponding measuring electrodes 31 to receive the response signals of the measuring signals at the same time.

Considering that the depth of the drilled well is different in the actual geological exploration using the electrical prospecting system, the response signals obtained by the receiver 30 through the plurality of measuring electrodes 31 are different, and the depth of the drilled well is changed continuously. Therefore, it is necessary to control the plurality of measuring electrodes 31 of each receiver 30 to be able to receive the response signals of the measurement signals at the same time.

However, for some complicated terrain areas, such as mining areas, railway lines, high-voltage lines, factories, etc., where electromagnetic interference is serious, interference may be caused to the reception of the response signals by the measuring electrodes 31, which may result in inconsistent time for the plurality of measuring electrodes 31 in the receiver 30 to start receiving the response signals. For example, there is one measuring electrode 31 that starts to receive a response signal 1 minute later than the other measuring electrodes 31. This may result in the measuring electrode 31 not receiving a response signal to the measuring signal, or the received signal may be a signal that is a response signal to other non-measuring signals.

Therefore, the receiver 30 also needs to time compensate for the predetermined reception times of the corresponding plurality of measurement electrodes 31. Fig. 3 is a schematic diagram of a time compensation provided by an embodiment of the present disclosure. As shown in fig. 3, the transmitter 20 starts to transmit the measurement signal at time Ts, and the measurement electrode 31A and the measurement electrode 31B of a certain receiver 30 start to receive the response signal of the measurement signal at time Ta and time Tb, respectively. The receiver 30 determines whether or not the waveforms of the response signals received by the plurality of measurement electrodes 31 are synchronized at the time of the black point in the drawing, where synchronization means that the waveforms of the response signals received by the plurality of measurement electrodes are the same and the high and low levels of the waveforms are the same within a certain time range. If the response signal received by one measuring electrode is not synchronous with the response signals received by the other measuring electrodes, the time compensation is performed on the predetermined receiving time corresponding to the measuring electrode 31. For example, the sub-controller controlling the measuring electrode 31 starts the measuring electrode 31 in advance to receive the response signal of the measuring signal, so that the measuring electrode 31 can receive the response signal of the measuring signal synchronously with other measuring electrodes 31.

In some embodiments, each receiver 30 records the time when the corresponding plurality of measuring electrodes 31 begin receiving the response signal. The receiver 30 is further configured to determine a first receiving time from the time when the corresponding measuring electrodes 31 start receiving the response signal of the measuring signal, wherein the first receiving time is the time when the first measuring electrode starts receiving the response signal of the measuring signal, and the first measuring electrode is the measuring electrode which first starts receiving the response signal of the measuring signal among the measuring electrodes 31. Then, the receiver 30 calculates a reception time difference of a second measurement electrode, which is one of the plurality of measurement electrodes 31 other than the first measurement electrode, from the first reception time and a second reception time, which is a time when the second measurement electrode starts to receive a response signal of the measurement signal; and according to the calculated receiving time difference of the second measuring electrode, performing time compensation on the preset receiving time corresponding to the second measuring electrode. The time compensation means that a sub-controller corresponding to the second measuring electrode starts the second measuring electrode to start receiving the response signal in advance, namely, the preset receiving time is advanced, and the time started in advance is the receiving time difference of the second measuring electrode. Illustratively, the receiver 30 includes 16 measuring electrodes, of which 16 measuring electrodes 31, measuring electrode a starts to receive the response signal of the measuring signal first at 10 points, and measuring electrode B starts to receive the response signal of the measuring signal separately at 10 points 1. And if the receiving time difference of the measuring electrode B is 1 minute, the sub-controller corresponding to the measuring electrode B starts the measuring electrode B to receive the response signal 1 minute in advance.

By time compensation of the preset receiving time of the measuring electrodes, the plurality of measuring electrodes of each receiver can synchronously receive the response signals of the measuring signals, and the response signals of the measuring signals received by the plurality of measuring electrodes of each receiver are more accurate.

Optionally, the electrical prospecting system in the disclosed embodiment further includes an ADC (Analog-to-digital converter) unit. Fig. 4 is a schematic structural diagram of a receiver 30 provided in an embodiment of the present disclosure, referring to fig. 4. Each receiver 30 comprises an ADC unit 33. Each ADC unit 33 includes a plurality of signal input ports, and a plurality of signal output ports corresponding to the plurality of signal input ports, respectively. A plurality of signal input ports correspond to the number of measurement electrodes 31 of the receiver 30, one signal input port corresponding to each measurement electrode 31, and each signal output port corresponding to one input port of the controller 32. The ADC unit 33 is adapted to convert the analog response signal received via the measurement electrode 31 into a digital signal.

Illustratively, the master control chip of each controller 32 is an ARM Cortex-M4 processor, and each controller 32 supports 16 ADC channels for data acquisition. The ADC unit 33 is a 24-bit high-precision ADC sampling chip.

Optionally, as shown in fig. 4, each receiver 30 in the embodiment of the present disclosure further includes an analog front end unit 34. An analog front end unit 34 is arranged between the measurement electrode 31 of each receiver 30 and the ADC unit 33.

The analog front end unit 34 includes a first-order RC filter circuit, a programmable gain amplification circuit, and a second-order active low pass filter circuit. The first-order RC filter circuit is used to filter small interference signals with high frequency or small amplitude mixed in the response signals received by the measuring electrodes 31. The programmable gain amplifying circuit is used for amplifying the peak value of the response signal filtered by the first-order RC filter circuit to improve the resolution of the ADC unit 33. The second-order active low-pass filter circuit is used for filtering small interference signals amplified by the programmable gain amplification circuit.

Due to many unknown factors and potential external interference in the underground medium, interference signals may exist in response signals received by the receiver 30 after the test signals transmitted by the transmitter 20 to the tested area are transmitted underground. Therefore, the analog front end unit 34 is disposed between each measuring electrode 31 and the ADC unit 33 to filter the response signals of the measuring signals received by the measuring electrodes 31, so that the plurality of response signals obtained by the receiver 30 can be more accurate.

Optionally, as shown in fig. 4, each receiver 30 further includes a channel switching unit 35. A channel switching unit 35 is located between each measuring electrode 31 and the controller 32 of the receiver 30.

The channel switching unit 35 includes a switch combination circuit, and each switch corresponds to one of the measurement electrodes 31. The controller 32 can open or close the measuring electrode 31 built in with the switch by controlling the opening or closing of the switch in the channel switching unit 35. When the controller 32 controls the switch corresponding to the measuring electrode 31 to be closed, the measuring electrode 31 is turned on, and the controller 32 can obtain a response signal of the measuring signal received by the measuring electrode 31. When the controller 32 controls the switch corresponding to the measuring electrode 31 to be opened, the measuring electrode 31 is opened, and the controller 32 cannot acquire a response signal of the measuring signal received by the measuring electrode 31. Illustratively, the switches in the channel switching unit 35 are relays.

By designing the channel switching unit 35 between each measuring electrode 31 and the controller 32, it is possible to flexibly switch each measuring electrode 31 to receive the response signal according to the actual requirement of the measurement. For example, only the switches corresponding to the plurality of measuring electrodes 31 closer to the measured area are controlled to be closed.

Optionally, in the embodiment of the present disclosure, when the electrical prospecting system is used in the detected region for the first time, each receiver 30 is further configured to obtain the first position parameters of the corresponding plurality of measuring electrodes 31 by controlling the channel switching unit 35, and send the first position parameters of the plurality of measuring electrodes 31 to the control device 10.

The control device 10 is configured to calibrate a second position parameter of the plurality of measuring electrodes 31 stored in advance, based on the first position parameter of the plurality of measuring electrodes 31. The first position parameter is a position parameter at which each measuring electrode 31 is actually arranged, and the second position parameter is a position parameter at which the control device 10 simulates each measuring electrode 31 in advance according to the measured area topography or the like. And when the first position parameter is inconsistent with the second position parameter, modifying the second position parameter by taking the acquired first position parameter as a reference.

Illustratively, the first position parameter and the second position parameter are position coordinates of each measuring electrode 31. A positioning unit is arranged on each of the plurality of measuring electrodes 31 of each receiver 30, and each measuring electrode 31 acquires the first position parameter through the arranged positioning unit. The positioning unit can be GPS, BDNS, GSNS, GNSS and the like.

The calibration of the position parameters of the individual measuring electrodes 31 by the channel switching unit 35 makes it possible for the control device 10 to obtain accurate position parameters of the actually arranged measuring electrodes 31. In this way, the control device 10 can obtain a relatively accurate view resistivity view according to the accurate position parameters of the measuring electrodes 31 and the obtained geological data corresponding to the position parameters, and further more accurately analyze the geological condition of the measured area according to the view resistivity view.

Optionally, as shown in fig. 4, each receiver 30 further comprises a power management unit. The power management unit is used to supply power to the wireless communication unit 40, the positioning unit 50, the controller 32, and the like of each receiver 30.

Fig. 5 is a schematic structural diagram of a control device 10 according to an embodiment of the present disclosure. As shown in fig. 5, the control device 10 includes a positioning unit 50, a wireless communication unit 40, a processor 11, and a memory 12. Illustratively, the control apparatus 10 is a PC (Personal Computer) machine.

Wherein the positioning unit 50 of the control device 10 is used to achieve the acquisition of the current UTC time, and the wireless communication unit 40 of the control device 10 is used to achieve the communication with the transmitter 20 and at least two receivers 30. A database for storing a plurality of response signals of the measurement signals transmitted by the at least two receivers 30 is disposed in the memory 12, and the processor 11 is configured to perform data processing on the plurality of response signals of the measurement signals transmitted by the at least two receivers 30.

Fig. 6 is an electrical prospecting method provided by the embodiment of the disclosure, which is executed by the control device, the transmitter and at least two receivers in fig. 1 together. Referring to fig. 6, the method includes the steps of:

in step 601, the control device sends a first control command to the transmitter and a second control command to the at least two receivers, the first control command being used for instructing the transmitter to transmit the measurement signal to the measured area at a predetermined transmission time, and the second control command being used for instructing each receiver to control the corresponding plurality of measurement electrodes to start receiving the response signal of the measurement signal at a predetermined receiving time, wherein the predetermined receiving time is not later than the predetermined transmission time.

The first control command includes transmission time information, and the second control command includes reception time information. The relevant contents of the transmission time information and the reception time information are referred to the embodiment shown in fig. 1, and a detailed description is omitted here.

In step 602, the transmitter transmits a measurement signal according to a first control command.

The relevant content of the measurement signal is referred to the embodiment shown in fig. 1, and the detailed description is omitted here.

In step 603, the receiver controls the corresponding plurality of measuring electrodes to receive the response signals of the measuring signals according to the second control command.

In step 604, the receiver transmits a response signal to the received plurality of measurement signals to the control device.

In step 605, the control device receives a response signal transmitted by the receiver.

The response signal is the response signal of the measurement signal received by the receiver according to the second control command to control the corresponding plurality of measurement electrodes, and the measurement signal is transmitted by the transmitter according to the first control command.

In an embodiment of the disclosure, an electrical prospecting system includes a control device, a transmitter, and at least two receivers, each receiver having a plurality of measuring electrodes. On the one hand, the number of the measuring electrodes can be increased by arranging a plurality of receivers, so that more geological data can be obtained by a larger number of measuring electrodes. On the other hand, the transmitter starts to transmit the measurement signal at a predetermined transmission time, and each receiver starts to receive the response signal of the measurement signal at a predetermined reception time which is not later than the predetermined transmission time. Therefore, each receiver can control the corresponding plurality of measuring electrodes to start receiving the response signals of the measuring signals when the transmitter starts to transmit the measuring signals; alternatively, each receiver may control the corresponding plurality of measuring electrodes to start receiving the response signal of the measuring signal before the transmitter starts transmitting the measuring signal. Therefore, the situation that the response signals of the measuring signals cannot be received by the measuring electrodes of the receiver can be reduced, more geological data can be obtained, and the geological condition of the measured area can be accurately reflected through the obtained more geological data.

Optionally, in an embodiment of the present disclosure, the electrical prospecting method further includes:

firstly, the control device determines the current time through a built-in positioning unit and generates the scheduled transmitting time and the scheduled receiving time according to the current time. The determination of the predetermined transmission time and the predetermined reception time is related to the embodiment shown in fig. 2, and a detailed description thereof is omitted.

And secondly, the transmitter starts to transmit the measuring signal according to the first time and the preset transmitting time.

The first time is UTC time acquired by the transmitter through the built-in positioning unit in real time, or UTC time acquired by the transmitter through the built-in positioning unit when the transmitter receives the first control command. The transmitter transmits the measurement signal according to the embodiment shown in fig. 2, and the detailed description is omitted.

And thirdly, each receiver controls the corresponding measuring electrodes to start to receive response signals of the measuring signals according to the second time and the preset receiving time.

The second time is UTC time acquired by each receiver through the built-in positioning unit in real time or UTC time acquired by each receiver through the built-in positioning unit when receiving the second control command. The receiver receives the relevant content of the response signal of the measurement signal, see the embodiment shown in fig. 2, and a detailed description is omitted here.

Optionally, in an embodiment of the present disclosure, the electrical prospecting system further includes:

the receiver determines a first receiving time from the time when the receiver starts to receive the response signal from the corresponding measuring electrodes, wherein the first receiving time is the time when the first measuring electrode starts to receive the response signal of the measuring signal, and the first measuring electrode is the measuring electrode which starts to receive the response signal of the measuring signal firstly in the plurality of measuring electrodes; calculating a receiving time difference of a second measuring electrode according to the first receiving time and a second receiving time, wherein the second receiving time is the time when the second measuring electrode starts to receive the response signal of the measuring signal, and the second measuring electrode is one of a plurality of measuring electrodes except the first measuring electrode; and according to the calculated receiving time difference of the second measuring electrode, performing time compensation on the preset receiving time corresponding to the second measuring electrode.

The time compensation is related to the embodiment shown in fig. 2, and a detailed description is omitted here.

Optionally, in an embodiment of the present disclosure, before the first measurement is performed on the measured area, the electrical prospecting method further includes:

each receiver acquires the first position parameters of the corresponding plurality of measuring electrodes and sends the first position parameters of the plurality of measuring electrodes to the control device.

The control equipment receives first position parameters of the corresponding multiple measuring electrodes sent by the receivers; and calibrating the prestored second position parameters of the plurality of measuring electrodes according to the first position parameters of the plurality of measuring electrodes. The position parameter calibration is related to the embodiment shown in fig. 2, and a detailed description thereof is omitted.

Optionally, in an embodiment of the present disclosure, the electrical prospecting method further includes: the control device determines the operating states of the transmitter and the at least two receivers before sending the first control command and the second control command to the transmitter and the receivers, respectively.

The control equipment sends requests to the transmitter and the at least two receivers, and judges the working states of the transmitter and the at least two receivers according to the feedback information of the transmitter and the at least two receivers.

If the control equipment can receive the feedback information of the transmitter and the at least two receivers, the communication between the control equipment and the transmitter and the communication between the control equipment and the at least two receivers are normal; otherwise, a failure of the radio communication unit of the control device or of the transmitter or of the at least two receivers is indicated. At this time, the control device prompts the alarm information or stores the communication failure information into the device log, and related technicians specifically analyze the reason of the communication failure according to the alarm information or the device log.

When the transmitter and at least two receivers receive the request sent by the control equipment, the transmitter and at least two receivers judge whether the respective positioning units work normally or not, and feed back the state information of the positioning units to the control equipment.

If the control equipment determines that the positioning unit has a fault according to the state information of the positioning unit in the feedback information, alarm information is prompted or the fault information of the positioning unit is stored in an equipment log, and related technicians maintain the fault positioning unit according to the alarm information or the system log.

If the communication between the control device and the transmitter and between the control device and the at least two receivers is normal, and the positioning unit of the control device, the positioning unit of the transmitter and the positioning units of the at least two receivers are normal, a first control command is sent to the transmitter, and a second control command is sent to each receiver.

Optionally, in an embodiment of the present disclosure, the electrical prospecting method further includes: after the at least two receivers send the response signals to the control device, the power management unit is cut off to stop supplying power, and the controller and the wireless communication module enter a standby mode. And when the controller receives the control command of the control equipment again, the power supply of the power supply management unit is recovered. By switching off the power management unit, power can be saved as much as possible to prolong the service time of the receiver.

Fig. 7 is a block diagram of a computer device according to an embodiment of the present disclosure. The computer device includes: a processor 701 and a memory 702.

The processor 701 may include one or more processing cores, such as a 4-core processor, a 7-core processor, and so on. The processor 701 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 701 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 701 may be integrated with a GPU (Graphics Processing Unit) that is responsible for rendering and drawing content that needs to be displayed on the display screen. In some embodiments, the processor 701 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 702 may include one or more computer-readable storage media, which may be non-transitory. Memory 702 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 702 is used to store at least one instruction for execution by processor 701 to implement a method of electrical prospecting as provided in embodiments of the present application.

Those skilled in the art will appreciate that the architecture shown in FIG. 7 is not intended to be limiting of computer devices, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of a computer device, enable the computer device to perform the electrical prospecting method provided in the embodiments of the present application.

A computer program product containing instructions which, when run on a computer, cause the computer to perform a method of electrical prospecting as provided by embodiments of the present application.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. An electrical prospecting system, characterized in that it comprises: a control device, a transmitter and at least two receivers; each of the receivers includes a plurality of measurement electrodes;

the control device is used for sending a first control command to the transmitter, wherein the first control command is used for instructing the transmitter to start transmitting a measurement signal to the measured area at a preset transmission time;

the control device is further configured to send a second control command to each of the receivers, where the second control command is used to instruct each of the receivers to control the corresponding plurality of measurement electrodes to start receiving the response signal of the measurement signal at a predetermined receiving time, where the predetermined receiving time is not later than the predetermined transmitting time;

the transmitter is used for transmitting the measuring signal according to the first control command;

the receiver is used for controlling the corresponding measuring electrodes to receive response signals of the measuring signals according to the second control command and sending the received response signals to the control equipment.

2. An electrical prospecting system according to claim 1, characterized in that the control device, the transmitter and the receiver each comprise a positioning unit;

the control equipment is used for determining the current time through a built-in positioning unit and generating the scheduled transmitting time and the scheduled receiving time according to the current time;

the transmitter is used for determining a first time, and starting to transmit the measurement signal according to the first time and the preset transmission time, wherein the first time is real-time UTC time acquired by the transmitter through a built-in positioning unit, or UTC time acquired by the transmitter through the built-in positioning unit when the transmitter receives the first control command;

each receiver is configured to determine a second time, and control the corresponding multiple measurement electrodes to start receiving the response signals according to the second time and the predetermined receiving time, where the second time is a real-time UTC time acquired by each receiver through a built-in positioning unit, or a UTC time acquired by each receiver through a built-in positioning unit when the receiver receives the second control command.

3. The electrical prospecting system of claim 2, wherein each of the receivers is further configured to determine a first reception time from among times at which the corresponding plurality of measurement electrodes start receiving the response signal of the measurement signal, the first reception time being a time at which a first measurement electrode starts receiving the response signal of the measurement signal, the first measurement electrode being a measurement electrode of the plurality of measurement electrodes that starts receiving the response signal of the measurement signal first;

calculating a receiving time difference of a second measuring electrode according to the first receiving time and a second receiving time, wherein the second receiving time is a time when the second measuring electrode starts to receive a response signal of the measuring signal, and the second measuring electrode is one of a plurality of measuring electrodes except the first measuring electrode;

and according to the calculated receiving time difference of the second measuring electrode, performing time compensation on the preset receiving time corresponding to the second measuring electrode.

4. An electrical prospecting system according to any one of claims 1 to 3, wherein each receiver further comprises a channel switching unit, and each receiver is further configured to acquire first position parameters of a corresponding plurality of measuring electrodes by controlling the channel switching unit and to transmit the first position parameters of the plurality of measuring electrodes to the control device;

the control equipment is used for calibrating the prestored second position parameters of the plurality of measuring electrodes according to the first position parameters of the plurality of measuring electrodes.

5. A method of electrical prospecting, the method comprising:

the control device sends a first control command to a transmitter and sends a second control command to at least two receivers, wherein the first control command is used for instructing the transmitter to transmit a measurement signal to a measured area at a preset transmission time, and the second control command is used for instructing each receiver to control a corresponding plurality of measurement electrodes to start receiving a response signal of the measurement signal at a preset receiving time which is not later than the preset transmission time;

the control device receives a response signal sent by the receiver, the response signal is a response signal of a measurement signal received by the receiver according to the second control command and controlling the corresponding multiple measurement electrodes, and the measurement signal is transmitted by the transmitter according to the first control command.

6. The method of claim 5, further comprising:

the control equipment determines the current time through a built-in positioning unit, and generates the scheduled transmitting time and the scheduled receiving time according to the current time;

the transmitter is configured to start transmitting the measurement signal according to a first time and the predetermined transmission time, where the first time is an UTC time acquired by the transmitter through a built-in positioning unit in real time, or an UTC time acquired by the transmitter through the built-in positioning unit when the transmitter receives the first control command;

each receiver is configured to control a corresponding plurality of measurement electrodes to start receiving a response signal of the measurement signal according to a second time and the predetermined receiving time, where the second time is a real-time UTC time acquired by each receiver through a built-in positioning unit, or a UTC time acquired by each receiver through a built-in positioning unit when the receiver receives the second control command.

7. The method of claim 6, further comprising:

each receiver determines a first receiving time from the time when the corresponding plurality of measuring electrodes start to receive the response signal of the measuring signal, wherein the first receiving time is the time when a first measuring electrode starts to receive the response signal of the measuring signal, and the first electric measuring electrode is the measuring electrode which starts to receive the response signal of the measuring signal firstly in the plurality of measuring electrodes;

8. The method according to claim 6 or 7, characterized in that the method further comprises:

the control equipment receives first position parameters of the corresponding multiple measuring electrodes sent by the receivers;

and calibrating the prestored second position parameters of the plurality of measuring electrodes according to the first position parameters of the plurality of measuring electrodes.

9. A computer device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the method of claim 5 or 6 or 8.

10. A computer-readable storage medium, wherein instructions in the computer-readable storage medium, when executed by a processor of a computer device, enable the computer device to perform the method of claim 5 or 6 or 8.