CN104656145A - Electrical-method measurement system based on digital electrode technology - Google Patents
Electrical-method measurement system based on digital electrode technology Download PDFInfo
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- CN104656145A CN104656145A CN201410663818.1A CN201410663818A CN104656145A CN 104656145 A CN104656145 A CN 104656145A CN 201410663818 A CN201410663818 A CN 201410663818A CN 104656145 A CN104656145 A CN 104656145A
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Abstract
The invention provides an electrical-method measurement system based on a digital electrode technology. The design of the electrical-method measurement system based on digital electrodes is provided according to the features of array electrodes of a resistivity tomographic system and a digital wave detector technology of a modern seismic exploration acquisition system. The design realizes the innovation of electrical-method measurement. Issues like the circuit structure of the digital electrodes, the overall design of the system, a communication network control topological structure and other key technologies are discussed in the invention. The electrical-method measurement system based on the digital electrodes not only can be used for various methods about resistivity, induced polarization, phases, complex resistivity and the like, but also can be used for 3D electrical-method exploitation in a time domain or a frequency domain. As each digital electrode is involved in acquisition work, the data of various measurement devices can be simultaneously measured, the data acquisition efficiency is greatly improved, and exploitation of pseudo-seismic manner is realized.
Description
Technical field
Patent of the present invention relates to exploration geophysics---geophysical instrument technical field, especially resistivity prospecting measuring system.
Background technology
In all kinds of Key words exploration geophysics method, electrical survey is the important branch of exploration geophysics, be mutation and branch at most, the widest method of application surface, its development level is closely related with the technical progress of industrial production technology, socioeconomic status and Other subjects.Along with the development of advancing by leaps and bounds of modern physics, electronics, computing machine and signal processing technology, no matter electrical survey is at instrument development, or data sampling and processing technology and inverting, interpretation procedure research, all merged advanced scientific theory and new and high technology.But, existing high density electric survey and chromatographic imaging system still come with some shortcomings part, as single in measurement mechanism (each measurement only can be set to the devices such as winner, Schlumberger, three poles or dipole), the information measured is relatively less, existing high-density electric device only can use 2D or 2.5D to measure (intending 3D to measure), still cannot meet 3D and measure.
Summary of the invention
Only can be few with a kind of measurement device, quantity of information when current high density measuring system is measured, namely measure winner, Schlumberger, the device such as three grades and dipole simultaneously, in addition, the plan earthquake modes such as 2D and 3D measurement can be carried out measure, for existing electrical survey system urgently improvements, analyze the array electrode technology of high density measuring system and the digital geophone thought of seismic prospecting, propose the concept of digital electrode, and devise the electrical survey system based on digital electrode.This integrated design geophysics, electronic technology, mechanics of communication etc., in one, realize the once innovation that resistivity prospecting is measured; It not only for resistivity, induced polarization, phase place and frequency spectrum intensify (complex resistivity) etc. many measuring methods, and 2D, 3D resistivity prospecting that can be used in time domain or frequency field, and measure the data of multiple device simultaneously, realize the resistivity prospecting data acquisition intending earthquake mode.
Summary of the invention comprises digital electrode design and based on the integrated electrical survey system etc. of digital electrode.
1, digital electrode
The introducing of digital electrode makes Multifunction resistivity prospecting system be achieved, and be the core of Multifunction electrical survey system, its frame mode and passage tolerance limit decide overall performance and the function of system.Technically be mainly reflected in and the functions such as signals collecting, data storage and communication are distributed on acquisition electrode.Its design philosophy derives from the array electrode technology of resistivity tomography system and the data acquisition system (DAS) of Modern seismic exploration.Modern seismic exploration data acquisition system adopts digital geophone to add advanced network communications technology, conventional moving-coil geophone is far superior in the stability etc. of amplitude calibration, temperature variation, weight, reliability and timeliness, due to fully digital output, there is good Electro Magnetic Compatibility, insensitive for electric leakage, the impact of cross-talk is also very little, can meet the real-time data acquisition in road up to ten thousand.Digital electrode has merged the feature of digital geophone and resistivity tomography acquisition system, achieves the once innovation of the data acquisition system (DAS) of resistivity prospecting.
Digital electrode is integrated with the modules such as micro-chip processor, signal conversion, fieldbus, data storage and communication forwarding in one, and its structure is shown in shown in Figure of description 1.Digital electrode and main frame form master slave relation, Receiving Host instruction, completing the functions such as the setting of electrode working method, data acquisition and data transmission. digital electrode technology is equivalent to the digital electrode of seismic survey system, multiple tracks is collaborative to be gathered, the data acquisition of direct current multi-electrode resistivity imaging survey can not only be realized, and the data acquisition in multi-frequency territory can be realized, thus measure the measurement of induced polarization, phase place, complex resistivity.
Digital electrode is different from the array electrode of resistivity tomography system.The switch enclosure only Receiving Host switch order code of chromatographic imaging system array electrode, switches electrode and cable system is turned on or off, thus realizes electrode by the connection of cable with A, B, M or N pole of measurement main frame; Main frame acquisition module realize signal condition, conversion, process and data storage etc.And digital electrode not only realizes the switching between Different electrodes, and realize signals collecting and memory function, between main frame and digital electrode, be integrated into master-slave network structure; Due to work such as the conditioning of digital electrode single track settling signal, conversion, process, anti-electromagnetic interference capability strengthens greatly, does not almost have cross-talk; In addition, complete digital communication between digital electrode and main frame, overcomes the long range signals decay of traditional chromatographic imaging system, loses and the problem such as anti-interference; In addition, the setting of digital electrode observation device is very flexible, not only can meet traditional measuring method, and each digital electrode can be exactly a small-sized measuring system, and all digital electrode measurement data are passed back main frame, parse the data of multiple measurement mechanism, realize the measuring method of many devices, multiparameter.
2, based on the electrical survey system of digital electrode
Digital electrode has independently address; Metering system has two kinds, and one is the order of digital electrode Receiving Host and controls multi-way switch to connect A, B, M pole or disconnection in the large line of measurement, and digital electrode self access the earth one end is N
npole (n is the numbering of digital electrode), digital electrode is by measuring MN
nbetween potential difference (PD) U
mn(as U can be regarded
m1, U
m2, U
m3, U
m4deng), and pass main frame back by communication system; Another kind of mode is the measurement of all digital electrode and the potential difference (PD) between A, B, M, obtains potential difference (PD) between any two electrodes through simple calculations process.
The beneficial effect of patent of the present invention is: multiple digital electrode is measured simultaneously, main frame can obtain the information of multiple measurement mechanism (device such as winner, Schlumberger, three poles or dipole) by simple calculations process, if digital electrode net synchronization capability consistent (reaching digital electrode crystal oscillator clock by fieldbus real-time performance consistent) and different excitaton sources (AB power supply mode), measure phase difference, induced polarization and frequency spectrum parameters such as (complex resistivitys) can also be intensified.Utilize a survey line can carry out 2D and measure imaging, if infinite point is placed in any for AB pole, adopt many measuring methods, 3D can be carried out and measure imaging.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is circuit principle structure figure of the present invention.
Fig. 2 is based on the electrical survey system schematic of digital electrode.
Fig. 3 is based on the acquisition mode key diagram of the electrical survey system of digital electrode.
Fig. 4 measures Cable structure schematic diagram.
Embodiment
In FIG, central processing unit (arm, DSP or 51 etc. single-chip microcomputer) is core (the CPU part of similar computer), the order that he is sent by fieldbus Receiving Host, according to Host Command, central processing unit switches multicircuit switch and the terminals such as the ABMN in ground-electrode and the large line of measurement is connected, if N terminal connected by multi-way switch, central processing unit controls the potential difference (PD) between terminal such as A/D module measurement N and A, B, M etc., and in temporary flash storage, finally utilize Field Bus Transceiver to be sent to main frame by fieldbus.
Fig. 2 is the electrical survey system based on digital electrode, wherein measuring main frame is PC, major function comprises man-machine interaction, data storage and field survey data prediction etc., power source generator mainly produces (AB power packs) such as the power supplies in electrical survey, need to adopt direct methods, square wave (frequency spectrum, complex resistivity method etc.) or two-color excitation etc. according to measurement, control casing is the function of the adapter of digital electrode, PC main frame and power source generator.
Fig. 3 be based on digital electrode electrical survey mode illustrate schematic diagram.Digital electrode 2 connects A, and digital electrode 9 connects B, and digital electrode 4 connects M, and other digital electrode and large line A, B, M disconnect, and other Any Digit electrodes can be N and measure the potential difference (PD) between MN; Or all digital electrode measurements and the potential difference (PD) between A, B, M, digital electrode 1 measured value is Ua1Ub1Um1, and as a same reason, other digital electrode measure Ua2Ub2Um2; Ua3Ub3Um3; Ua10Ub10Um10 etc.; Potential difference (PD) then between digital electrode 3 and 6 is: Ua3-Ua6 Ua3-Ua6 or Um3-Um6; By that analogy, the voltage difference between any two digital electrode combinations can be obtained simultaneously.Therefore, to be calculated by simple by the measurement of all electrodes, can obtain simultaneously obtain urethane acrylate anionomer (A-M-N-B, spacing between electrodes is equal), Schlumberger device (A-MN-B, AB spacing changes, and MN spacing is constant), the data that dipole (AB-MN) etc. are measured.If infinite point is placed by extended line in A pole or B pole, can obtain 3 pole measuring methods, multiple parallel survey line can carry out 3D and measure imaging etc.
Fig. 4 is for measuring cable composition, cable has nine, two power cables as current supply circuit A, B, four for power supply with communicate integrally, net synchronization capability is high, antijamming capability is strong (screen layer) fieldbus (as DeviceNet field bus technique) is as the working power supplying digital electrode, relay station (communication and power supply expansion) is set time necessary, G is the screen layer of ready-made bus, other two difference called after MN.
Claims (2)
1. based on the high density measuring system of digital electrode, comprise digital electrode (1), be connected to and measure large line (2) and measure main frame (3), it is characterized in that: described potential electrode comprises multiple change-over switch, relay, overload detection circuit, compares amplifying circuit, control circuit, indicating circuit and time-delay reset circuit, overload detection circuit comprises current transformer (s), MCU, voltage measurement module and communication module etc., the order that during work, Receiving Host sends, switches ground-electrode and the different cables core measuring large line; Namely cable core comprises resistivity prospecting electrodes of A, B core, also comprises potential electrode M, N, also comprises the communication cable (CAN or DevceNet bus etc.) based on field bus technique; Main frame major function comprises: the function such as the earth power supply AB, measurement data computing of man-machine interaction, administering digital electrode, management resistivity prospecting.
2. digital electrode is that core realizes difference in functionality by Receiving Host order, mainly comprise the public pole etc. switched to for battery core A, B, M, N or infinite distance, if connect cable A core, then change the A pole that electrode is resistivity prospecting, voltage measurement module measures this electrode and public electrode, potential difference (PD) between B, M, N; As a same reason, the public pole that electrode connects B, M, N or infinite distance if change, changing electrode is exactly corresponding resistivity prospecting electrode, and voltage measurement module measures the potential difference (PD) from different electrodes respectively; Then, the signal of measurement is transferred to main frame by the connection of cable by potential electrode, and main frame, by computing, can obtain the data of the multiple measurement mechanism of resistivity prospecting respectively, provide measurement efficiency; Data electrode can infinite expanding, and each electrode has independently identifier, and corresponding with measuring point; If many surveys line, resistivity prospecting 3d space can be realized and measure, obtain the measurement in space data surveying district.
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| CN201410663818.1A CN104656145A (en) | 2014-11-20 | 2014-11-20 | Electrical-method measurement system based on digital electrode technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866860A (en) * | 2016-06-07 | 2016-08-17 | 中国石油天然气集团公司 | Method and device for determining resistivity threshold value of target region |
| CN105911594A (en) * | 2016-04-18 | 2016-08-31 | 张道清 | ZH-8 type multi-functional electrical workstation |
| WO2019200905A1 (en) * | 2018-04-18 | 2019-10-24 | 浙江大学 | Three-dimensional high-density resistivity measurement method based on electrode random distribution and exploration system |
| CN110927805A (en) * | 2019-12-18 | 2020-03-27 | 吉林大学 | Portable ultrahigh-resolution multi-remote-electrode array electrical method measuring device and method |
-
2014
- 2014-11-20 CN CN201410663818.1A patent/CN104656145A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911594A (en) * | 2016-04-18 | 2016-08-31 | 张道清 | ZH-8 type multi-functional electrical workstation |
| CN105911594B (en) * | 2016-04-18 | 2019-02-19 | 张道清 | The multi-functional electrical method work station of ZH-8 |
| CN105866860A (en) * | 2016-06-07 | 2016-08-17 | 中国石油天然气集团公司 | Method and device for determining resistivity threshold value of target region |
| CN105866860B (en) * | 2016-06-07 | 2018-03-13 | 中国石油天然气集团公司 | A kind of method and apparatus for determining target area resistivity threshold value |
| WO2019200905A1 (en) * | 2018-04-18 | 2019-10-24 | 浙江大学 | Three-dimensional high-density resistivity measurement method based on electrode random distribution and exploration system |
| US11262472B2 (en) | 2018-04-18 | 2022-03-01 | Zhejiang University | Prospecting method and instrument system of the three-dimensional electrical resistivity tomography based on random distribution of electrodes |
| CN110927805A (en) * | 2019-12-18 | 2020-03-27 | 吉林大学 | Portable ultrahigh-resolution multi-remote-electrode array electrical method measuring device and method |
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Application publication date: 20150527 |