CN108508492B - High-density resistivity measurement system for stabilizing current field and current field stabilizing method - Google Patents
High-density resistivity measurement system for stabilizing current field and current field stabilizing method Download PDFInfo
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Abstract
The invention provides a high-density resistivity measuring system for stabilizing an artificial current field and a current field stabilizing method, wherein the system comprises: the stepped power supply unit is used for providing stepped power supply voltage; the intelligent detection and judgment unit for the stability of the artificial current field is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable; and the intelligent control unit is used for controlling the stepped power supply unit after receiving the reminding signal so as to realize automatic adjustment of the power supply voltage. The invention provides a new idea of establishing a stable artificial current field in a high-density apparent resistivity measurement arrangement, and the invention can eliminate the influence of an unstable field, suppress industrial interference, improve the signal-to-noise ratio and ensure that the measurement result can truly and reliably reflect the apparent resistivity distribution condition in the underground half-space detection depth range.
Description
Technical Field
The invention relates to the technical field of electrical exploration, in particular to a high-density resistivity measurement system for stabilizing an artificial current field and a current field stabilizing method.
Background
the array electrical prospecting observation system was firstly developed by the japan OYO corporation and the university of birmingham in the uk in the early 90 th of the last century, so that the electrical prospecting can obtain the geoelectrical information of the underground medium by using an overlay observation mode like seismic prospecting, and the resistivity array prospecting method is called as a high-density resistivity method. Later, many geological instruments abroad began to develop such advanced facilities, mainly comprising OYO company, AGT company and ZONGE company in Japan, DMT company in Germany, PASI company in Italy, GF company in Czech, and the like. The developed high-density electrical method instrument mainly comprises two forms: a centralized (electrode control) high-density electrical method instrument and a distributed (electrode control) intelligent high-density electrical method instrument. The most prominent function is the RESECS high-density electrical instrument manufactured by German DMT company, which distributes the switching units on the electrodes (decoder), and the host machine of the instrument has a current measuring channel and a potential measuring channel which can be expanded to 6, and can control 960 electrodes at most under the conditions of single channel and multiple channels.
Instruments developed by our country in the end of the 90 s are beginning to be used in the exploration field. The representative instrument is a WDJD-3 multifunctional digital direct current exciter and a WDJD-3 multi-way electrode converter produced by the research institute of numerical control technology of Pentium in Chongqing, and the high-density measurement function of a direct current method is realized. The instrument is improved and upgraded on the original basis along with the development of electronic technology and computer intelligent control technology, various types of electrical methods are researched and developed, WDA-1 and WDA-1B type super digital direct current electrical methods are widely applied in China at present, the instrument is taken as a measurement and control host, and centralized two-dimensional high-density resistivity measurement can be realized by selecting and matching WDZJ-4 or WDZJ-120 multi-way electrode converters, centralized high-density cables and electrodes; and a distributed high-density resistivity cable or an induced voltage cable and an electrode can also be selectively matched, so that distributed two-dimensional and three-dimensional high-density resistivity measurement and distributed two-dimensional high-density induced voltage measurement are realized. The instruments are greatly improved in circuit design, intelligent control, data storage and data processing, but the measurement principle and the power supply control mode are basically not changed.
The method and the instrument find that the following problems exist in addition to the advantages through years of practical application:
At present, a high-density electrical method instrument used in China generally adopts a power supply mode that power supply voltage between power supply electrodes A-B is fixed and unchanged in a measurement arrangement, so that the current density of an underground half space becomes lower along with the increase of the distance between the power supply electrodes, the current density is increased to a certain degree, an artificial current field established in the underground half space becomes weak or unstable, particularly long-section arrangement is adopted, the number of the electrodes is large, the power supply requirement for measuring the small polar distance is ensured to be inevitably influenced by the power supply of the large polar distance under the condition that the voltage between the power supply electrodes A-B is fixed and unchanged, and the performance is more prominent in an exploration area with uneven grounding condition and large industrial interference. As a result, the measurement signals are unstable and have poor repeatability in a relatively deep part on a measurement section, so that the detection depth is limited, and the interpretation of exploration result data is difficult.
disclosure of Invention
aiming at the defects in the prior art, the invention provides a high-density resistivity measurement system for stabilizing an artificial current field and a current field stabilizing method.
in order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides a high density resistivity measurement system for stabilizing an artificial current field, comprising: cascaded power supply unit, artifical electric current field stability intellectual detection system and decision unit and intelligent control unit, wherein:
The stepped power supply unit is used for providing stepped power supply voltage so that a stable artificial current field can be established in the underground half space;
the intelligent detection and judgment unit for the stability of the artificial current field is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable;
and the intelligent control unit is used for controlling the stepped power supply unit after receiving the reminding signal so as to realize automatic adjustment of the power supply voltage.
further, the stepped power supply unit is used for outputting continuously-changed power supply voltage or outputting stepped power supply voltage, so that a stable artificial current field can be established in an underground half space.
Further, the intelligent detection and determination unit for stability of the artificial current field is specifically configured to:
judging whether the underground half-space artificial current field is stable or not according to a comparison result of a full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
and/or the presence of a gas in the gas,
And judging whether the underground half-space artificial current field is stable or not according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold.
further, the intelligent control unit is specifically configured to:
after the reminding signal is received, the stepped power supply unit is controlled, and the power supply voltage output by the stepped power supply unit is automatically increased, so that a stable artificial current field can be established in an underground half space.
further, the intelligent control unit is specifically configured to:
after the reminding signal is received, if the difference between the full wave train signal and the power supply time sequence wave between the measurement electrodes MN meets a first difference condition, or the difference between the voltage and the voltage threshold value between the measurement electrodes MN and the difference between the phase and the phase threshold value meet a third difference condition, controlling the stepped power supply unit to carry out voltage lifting with a first amplitude;
If the difference between the full wave train signal between the measurement electrodes MN and the power supply time sequence wave meets a second difference condition, or the difference between the voltage between the measurement electrodes MN and the voltage threshold value and the difference between the phase position and the phase position threshold value meet a fourth difference condition, controlling the stepped power supply unit to carry out voltage lifting with a second amplitude;
wherein the first difference condition determined difference is greater than the second difference condition determined difference, the third difference condition determined difference is greater than the fourth difference condition determined difference, and the first magnitude is greater than the second magnitude.
In a second aspect, the present invention further provides a method for stabilizing an artificial current field of a high-density resistivity measurement system, including:
In the measuring process, whether the current underground half-space artificial current field is stable or not is judged in real time;
When the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted so that the underground half space can establish a stable artificial current field.
further, when it is detected that the current artificial current field in the underground half space is unstable, the power supply voltage is adjusted to establish a stable artificial current field in the underground half space, including:
When the current artificial current field in the underground half space is detected to be unstable, continuously changing and adjusting the power supply voltage so that the underground half space can establish a stable artificial current field;
or the like, or, alternatively,
When the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted in a step mode, so that the underground half space can establish a stable artificial current field.
further, in the measurement process, it is judged whether the current underground half-space artificial current field is stable in real time, and the method comprises the following steps:
In the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the comparison result of the full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
and/or the presence of a gas in the gas,
In the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold.
in a third aspect, the present invention further provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the artificial current field stabilization method of the high density resistivity measurement system according to the first aspect when executing the program.
In a fourth aspect, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for artificial current field stabilization of a high density resistivity measurement system according to the first aspect.
according to the technical scheme, the high-density resistivity measuring system for stabilizing the artificial current field comprises: cascaded power supply unit, artifical electric current field stability intellectual detection system and decision unit and intelligent control unit, wherein: the stepped power supply unit is used for providing stepped power supply voltage so that a stable artificial current field can be established in the underground half space; the intelligent detection and judgment unit for the stability of the artificial current field is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable; and the intelligent control unit is used for controlling the stepped power supply unit after receiving the reminding signal so as to realize automatic adjustment of the power supply voltage. Therefore, the invention provides a new idea of establishing a stable artificial current field in a high-density apparent resistivity measurement arrangement, adopts a step power supply mode, adjusts the voltage according to the stable condition of the underground half-space artificial current field, establishes the stable underground half-space artificial current field in the whole measurement arrangement, eliminates the influence of an unstable field, suppresses industrial interference, improves the signal-to-noise ratio, and ensures that the measurement result can truly and reliably reflect the apparent resistivity distribution condition in the underground half-space detection depth range.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a high density resistivity measurement system with stabilized artificial current field according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of a high density resistivity measurement system with a stable artificial current field according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the relationship between the exploration depth and the distance between the power supply electrodes, using an A-MN-B quadrupole depth measurement device as an example;
FIG. 4 is a flow chart of a method for artificial current field stabilization of a high density resistivity measurement system according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
an embodiment of the present invention provides a high density resistivity measurement system for stabilizing an artificial current field, referring to fig. 1, the system comprising: cascaded power supply unit 11, artifical electric current field stability intellectual detection system and decision unit 12 and intelligent control unit 13, wherein:
The stepped power supply unit 11 is used for providing stepped power supply voltage so that a stable artificial current field can be established in an underground half space;
it is understood that the stepped power supply unit 11 is used for outputting a continuously varying power supply voltage, or outputting a stepped power supply voltage, so that a stable artificial current field can be established in an underground half space;
It is understood that the step power supply unit 11 outputs the continuously varying power supply voltage means that the voltage output by the step power supply unit 11 can be continuously adjusted, for example, from 30V to 31V, then to 32V, and so on.
when the stepped power supply unit 11 outputs a stepped power supply voltage, power supply voltages of DC30V, DC50V, DC90V, DC150V, DC270V, DC400V, and DC600V may be output, in which:
DC 30V-DC 150V are used for ultra-shallow exploration with electrode distance less than 3 meters and total number of electrodes not more than 60 (depth less than 10 meters);
DC 50V-DC 270V are used for shallow exploration with the electrode distance of 5 meters and the total number of electrodes of not more than 60 (the depth is less than 50 meters);
DC 90V-DC 400V are used for shallow and middle layer exploration with electrode distance larger than 5 meters and total number of 60 electrodes (the depth is less than 100 meters);
the DC 90V-DC 600V are used for medium-depth exploration with the electrode distance of more than 5 meters and the total number of electrodes of 60-120 (the depth is less than 300 meters);
the division of the power supply voltage is based on the experience of the conventional high-density electrical prospecting. During exploration, reasonable selection and adjustment can be carried out according to actual geoelectricity conditions, so that the aim of establishing a stable artificial current field in the underground half space is fulfilled.
the artificial current field stability intelligent detection and judgment unit 12 is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable;
It can be understood that the intelligent detection and determination unit 12 for artificial current field stability is specifically configured to:
judging whether the underground half-space artificial current field is stable or not according to a comparison result of a full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
and/or the presence of a gas in the gas,
And judging whether the underground half-space artificial current field is stable or not according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold.
As can be seen, the intelligent detection and determination unit 12 for stability of the artificial current field can determine whether the underground half-space artificial current field is stable in the following two ways:
a. And (3) picking up full-wave train signals between the measuring electrodes MN to be compared with the power supply time sequence waveform, and judging whether the underground half-space artificial current field is stable or not by using a comparison result.
b. and measuring the voltage magnitude and the phase between the MNs to judge whether the underground semi-space artificial current field is stable or not.
It can be understood that, when determining whether the underground half-space artificial current field is stable according to the comparison result between the full-wave train signal between the measurement electrodes MN and the power supply time sequence wave, it may be determined whether the underground half-space artificial current field is stable by determining the matching condition or the matching degree between the full-wave train signal between the measurement electrodes MN and the power supply time sequence wave, for example, if the matching degree between the full-wave train signal between the measurement electrodes MN and the power supply time sequence wave is lower than a preset threshold, it is determined that the underground half-space artificial current field is unstable.
It can be understood that, when determining whether the underground half-space artificial current field is stable according to the voltage and the phase between the measurement electrodes MN and the corresponding voltage threshold and phase threshold, the voltage threshold and the phase threshold of the corresponding magnitude may be preset according to different ground electrical conditions, and then the artificial current field stability intelligent detection and determination unit 12 may determine the stability of the underground half-space artificial current field according to the preset threshold. For example, when the voltage between the MNs is smaller than a preset voltage threshold, it indicates that the underground half-space artificial current field is unstable, and the intelligent control unit 13 may be prompted to perform automatic adjustment of the power supply voltage.
in an optional embodiment, a threshold parameter required by the artificial current field stability intelligent detection and determination unit 12 may be set through an instrument operation panel to control the artificial current field stability intelligent detection and determination unit 12, so as to achieve the purpose of artificial current field stability determination applicable to different geoelectrical conditions.
And the intelligent control unit 13 is used for controlling the stepped power supply unit after receiving the reminding signal, so as to realize the automatic adjustment of the power supply voltage.
Referring to the schematic diagram of the working principle of the high-density resistivity measurement system for stabilizing the artificial current field shown in fig. 2, the schematic diagram is designed on the basis of a centralized high-density electrical method instrument which is composed of a WDA-1 type super digital direct current electrical method instrument as a host machine WDZJ-4 as a multi-way electrode converter, and the principle of the schematic diagram is also applicable to a distributed high-density electrical method instrument.
in this embodiment, the intelligent control unit 13 may include an intelligent operation panel, and the intelligent operation panel sets a threshold parameter required by the artificial current field stability intelligent detection and determination unit 12 to control the determination unit, so as to achieve the purpose of determining the artificial current field stability under different geoelectrical conditions.
Therefore, the system provided by the embodiment adopts the operation panel to set parameters, intelligently judges and controls, and is suitable for high-density electrical prospecting under various geoelectrical conditions. Because a stable power supply current field is established on the whole arrangement measuring section, the influence of an unstable field is eliminated, the industrial interference is suppressed, the signal to noise ratio is improved, and the apparent resistivity distribution condition in the underground half-space detection depth range can be truly and reliably reflected by the measuring result.
in an optional implementation manner, the intelligent control unit 13 is specifically configured to:
After the reminding signal is received, the stepped power supply unit is controlled, and the power supply voltage output by the stepped power supply unit is automatically increased, so that a stable artificial current field can be established in an underground half space. It is understood that, in other alternative embodiments, the intelligent control unit 13 may be further specifically configured to: and after the reminding signal is received, the stepped power supply unit is controlled, and the power supply voltage output by the stepped power supply unit is automatically reduced according to the condition so that a stable artificial current field can be established in the underground half space. However, in general, the artificial current field stabilizing process is performed by adjusting the voltage to a high voltage, but it is not excluded that the artificial current field stabilizing process is occasionally performed by adjusting the voltage to a low voltage.
FIG. 3 is a schematic diagram of the relationship between the exploration depth and the distance between the power supply electrodes, which is illustrated by an A-MN-B quadrupole depth measurement device. As can be seen from fig. 3, the multistage stepped power supply mode is adopted in one array, so that the contradiction between shallow power supply and deep power supply is solved, the length of the measuring section of one array can be greatly increased, the exploration depth is also increased, the defect that the depth detection is limited due to the fact that the original instrument can only measure a short section due to insufficient power supply with a large polar distance is overcome, and the working efficiency of high-density electrical exploration is really improved.
when the measuring system provided by the embodiment is used, in a complete measuring arrangement, measurement of the whole arrangement section and jump of the power supply voltage can be automatically completed without human intervention as long as relevant parameters are set according to the ground electrical conditions of an exploration area. The stable power supply current field is established on the whole arrangement measuring section, the anti-interference capability is enhanced, the exploration precision and the exploration depth are ensured, and the working efficiency of high-density electrical prospecting is greatly improved.
therefore, the power supply system, the artificial current field stability intelligent detection system and the voltage conversion intelligent control system of the high-density electrical method instrument are redesigned in the embodiment. The stability of the underground half-space artificial current field is judged by detecting full-wave train signals and variation conditions between the measuring electrodes MN in a stepped power supply mode, corresponding power supply channels are opened according to the stability condition of the underground half-space artificial current field, the stable underground half-space artificial current field is established in the whole measuring arrangement, the influence of an unstable field is eliminated, industrial interference is suppressed, the signal to noise ratio is improved, and the apparent resistivity distribution condition in the underground half-space detection depth range can be truly and reliably reflected by the measuring result.
In an optional implementation manner, the intelligent control unit 13 is specifically configured to:
After the reminding signal is received, if the difference between the full wave train signal and the power supply time sequence wave between the measurement electrodes MN meets a first difference condition, or the difference between the voltage and the voltage threshold value between the measurement electrodes MN and the difference between the phase and the phase threshold value meet a third difference condition, controlling the stepped power supply unit to carry out voltage lifting with a first amplitude;
If the difference between the full wave train signal between the measurement electrodes MN and the power supply time sequence wave meets a second difference condition, or the difference between the voltage between the measurement electrodes MN and the voltage threshold value and the difference between the phase position and the phase position threshold value meet a fourth difference condition, controlling the stepped power supply unit to carry out voltage lifting with a second amplitude;
wherein the first difference condition determined difference is greater than the second difference condition determined difference, the third difference condition determined difference is greater than the fourth difference condition determined difference, and the first magnitude is greater than the second magnitude.
it will be appreciated that in this alternative embodiment, the intelligent control unit 13 may make voltage adjustments as the case may be. For example, if the current unstable situation of the underground half-space artificial current field is serious, the output voltage can be greatly adjusted; if the unstable condition of the current underground half-space artificial current field is not too serious, the output voltage can be adjusted in a small amplitude, so that the purposes of ensuring the adjustment efficiency and the adjustment precision can be achieved.
As can be seen from the above description, the high-density resistivity measurement system with stable artificial current field provided by the present embodiment includes: cascaded power supply unit, artifical electric current field stability intellectual detection system and decision unit and intelligent control unit, wherein: the stepped power supply unit is used for providing stepped power supply voltage so that a stable artificial current field can be established in the underground half space; the intelligent detection and judgment unit for the stability of the artificial current field is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable; and the intelligent control unit is used for controlling the stepped power supply unit after receiving the reminding signal so as to realize automatic adjustment of the power supply voltage. Therefore, the embodiment provides a new idea of establishing a stable artificial current field in a high-density apparent resistivity measurement arrangement, the embodiment adopts a step power supply mode, voltage adjustment is carried out according to the stable condition of the underground half-space artificial current field, the stable underground half-space artificial current field is established in the whole measurement arrangement, the influence of an unstable field is eliminated, industrial interference is suppressed, the signal to noise ratio is improved, and the measurement result can truly and reliably reflect the apparent resistivity distribution condition in the underground half-space detection depth range.
another embodiment of the present invention provides a method for artificial current field stabilization of a high density resistivity measurement system, referring to fig. 4, the method comprising the steps of:
Step 101: and in the measuring process, judging whether the current underground half-space artificial current field is stable or not in real time.
step 102: when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted so that the underground half space can establish a stable artificial current field.
in an alternative embodiment, the step 102 is specifically implemented as follows:
When the current artificial current field in the underground half space is detected to be unstable, continuously changing and adjusting the power supply voltage so that the underground half space can establish a stable artificial current field;
Or the like, or, alternatively,
when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted in a step mode, so that the underground half space can establish a stable artificial current field.
In an alternative embodiment, the step 101 is specifically implemented as follows:
in the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the comparison result of the full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
and/or the presence of a gas in the gas,
in the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold.
Therefore, the embodiment adopts a stepped power supply mode, the stability of the underground half-space artificial current field is judged by detecting full-wave train signals and change conditions between the measuring electrodes MN, corresponding power supply channels are opened according to the stability condition of the underground half-space artificial current field, the stable underground half-space artificial current field is established in the whole measuring arrangement, the influence of an unstable field is eliminated, industrial interference is suppressed, the signal to noise ratio is improved, and the apparent resistivity distribution condition in the underground half-space detection depth range can be truly and reliably reflected by the measuring result.
In addition, the artificial current field stabilizing method of the high-density resistivity measuring system can be realized by adopting the high-density resistivity measuring system for stabilizing the artificial current field in the embodiment, the working principle and the technical effect are similar, and detailed description is omitted here.
Based on the same inventive concept, another embodiment of the present invention provides an electronic device, which specifically includes the following components, with reference to fig. 5: a processor 701, a memory 702, a communication interface 703 and a bus 704;
the processor 701, the memory 702 and the communication interface 703 complete mutual communication through the bus 704; the communication interface 703 is used for realizing information transmission between related devices such as modeling software, an intelligent manufacturing equipment module library and the like;
the processor 701 is configured to call a computer program in the memory 702, and the processor implements all the steps of the artificial current field stabilization method of the high-density resistivity measurement system according to the above embodiment when executing the computer program, for example, the processor implements the following steps when executing the computer program:
step 101: and in the measuring process, judging whether the current underground half-space artificial current field is stable or not in real time.
step 102: when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted so that the underground half space can establish a stable artificial current field.
based on the same inventive concept, another embodiment of the present invention provides a computer-readable storage medium, having a computer program stored thereon, which when executed by a processor implements all the steps of the artificial current field stabilization method of the high-density resistivity measurement system described in the above embodiment, for example, the processor implements the following steps when executing the computer program:
step 101: and in the measuring process, judging whether the current underground half-space artificial current field is stable or not in real time.
Step 102: when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted so that the underground half space can establish a stable artificial current field.
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A high density resistivity measurement system for stabilizing an artificial current field, comprising: cascaded power supply unit, artifical electric current field stability intellectual detection system and decision unit and intelligent control unit, wherein:
the stepped power supply unit is used for providing stepped power supply voltage so that a stable artificial current field can be established in the underground half space;
The intelligent detection and judgment unit for the stability of the artificial current field is used for judging whether the underground half-space artificial current field is stable or not and sending a reminding signal to the intelligent control unit when the underground half-space artificial current field is determined to be unstable;
the intelligent control unit is used for controlling the stepped power supply unit after receiving the reminding signal so as to realize automatic adjustment of power supply voltage;
The stepped power supply unit is used for outputting continuously-changed power supply voltage or stepped power supply voltage so that a stable artificial current field can be established in an underground half space;
Wherein, artifical electric current field stability intellectual detection system and decision unit specifically are used for:
Judging whether the underground half-space artificial current field is stable or not according to a comparison result of a full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
and/or the presence of a gas in the gas,
Judging whether the underground half-space artificial current field is stable or not according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold;
wherein, the intelligent control unit is specifically used for:
after the reminding signal is received, the stepped power supply unit is controlled, and the power supply voltage output by the stepped power supply unit is automatically increased, so that a stable artificial current field can be established in an underground half space;
Wherein, the intelligent control unit is specifically used for:
After the reminding signal is received, if the difference between the full wave train signal and the power supply time sequence wave between the measurement electrodes MN meets a first difference condition, or the difference between the voltage and the voltage threshold value between the measurement electrodes MN and the difference between the phase and the phase threshold value meet a third difference condition, controlling the stepped power supply unit to carry out voltage lifting with a first amplitude;
If the difference between the full wave train signal between the measurement electrodes MN and the power supply time sequence wave meets a second difference condition, or the difference between the voltage between the measurement electrodes MN and the voltage threshold value and the difference between the phase position and the phase position threshold value meet a fourth difference condition, controlling the stepped power supply unit to carry out voltage lifting with a second amplitude;
Wherein the first difference condition determined difference is greater than the second difference condition determined difference, the third difference condition determined difference is greater than the fourth difference condition determined difference, and the first magnitude is greater than the second magnitude.
2. an artificial current field stabilization method for a high-density resistivity measurement system based on the stabilized artificial current field of claim 1, comprising:
in the measuring process, whether the current underground half-space artificial current field is stable or not is judged in real time;
when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted so that the underground half space can establish a stable artificial current field.
3. The method of claim 2, wherein when it is detected that the current subsurface half-space artificial current field is unstable, adjusting the supply voltage so that the subsurface half-space can establish a stable artificial current field comprises:
when the current artificial current field in the underground half space is detected to be unstable, continuously changing and adjusting the power supply voltage so that the underground half space can establish a stable artificial current field;
Or the like, or, alternatively,
when the current artificial current field in the underground half space is detected to be unstable, the power supply voltage is adjusted in a step mode, so that the underground half space can establish a stable artificial current field.
4. The method of claim 3, wherein the step of judging whether the current underground half-space artificial current field is stable in real time during the measurement process comprises the following steps:
in the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the comparison result of the full wave train signal between the measuring electrodes MN and the power supply time sequence wave;
And/or the presence of a gas in the gas,
In the measuring process, whether the current underground half-space artificial current field is stable or not is judged according to the voltage and the phase among the measuring electrodes MN and the corresponding voltage threshold and phase threshold.
5. an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method for artificial current field stabilization of a high density resistivity measurement system according to any one of claims 2 to 4.
6. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for artificial current field stabilization of a high-density resistivity measurement system according to one of the claims 2 to 4.
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