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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Abstract
基于数字电极技术的电法测量系统。根据电阻率层析成像系统的阵列电极的特征和现代地震勘探采集系统的数字检波器技术，提出了基于数字电极的电法测量系统设计，这种设计将实现电法测量的创新；说明书讨论了数字电极的电路结构、系统的总体设计、控制通信网络拓扑结构和其他关键技术，基于数字电极的电法测量系统不仅用于可电阻率、激发极化、相位以及复电阻率的等多种方法，而且可用于时间域或频率域中的3D电法勘探，由于每个数字电极都参与采集工作，所以可以同时测量多种测量装置的数据，大大提高数据采集效率，从而实现拟地震方式的勘探。Electrical measurement system based on digital electrode technology. According to the characteristics of the array electrode of the resistivity tomography system and the digital detector technology of the modern seismic exploration acquisition system, the design of the electrical measurement system based on the digital electrode is proposed. This design will realize the innovation of the electrical measurement; the specification discusses The circuit structure of the digital electrode, the overall design of the system, the topology of the control communication network and other key technologies, the electrical measurement system based on the digital electrode is not only used for various methods such as resistivity, excited polarization, phase and complex resistivity. , and can be used for 3D electrical prospecting in the time domain or frequency domain. Since each digital electrode participates in the acquisition work, it can measure the data of multiple measuring devices at the same time, greatly improving the efficiency of data acquisition, thereby realizing quasi-seismic exploration. .
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.
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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 | A portable ultra-high-resolution multi-distance electrode array electrical measurement 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 | A portable ultra-high-resolution multi-distance electrode array electrical measurement device and method |
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