CN203930089U - A kind of distributed ocean electrical survey device - Google Patents
A kind of distributed ocean electrical survey device Download PDFInfo
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- CN203930089U CN203930089U CN201420342017.0U CN201420342017U CN203930089U CN 203930089 U CN203930089 U CN 203930089U CN 201420342017 U CN201420342017 U CN 201420342017U CN 203930089 U CN203930089 U CN 203930089U
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Abstract
The utility model discloses a kind of distributed ocean electrical survey device, comprise generator, ocean electrical method transmitter, sender electrode, one receives total node and multiple data acquisition child node, PC host computer and software thereof and be connected in total node and each child node between cable, generator connects ocean electrical method transmitter and inputs electric energy to it, the voltage that produces and send by PC host computer regulation and control ocean electrical method transmitter, electric current and frequency, send by sender electrode, PC upper computer software sends order to receiving total node, receive and sum up the electric signal of the multiple data acquisition child node of point control synchronous acquisition from receiving electrode, pass the digital electric signal of collection back to PC upper computer software by cable.The utility model adopts distributed measurement, has improved collection density and precision, makes instrument become miniaturization and lighting; The design of cable and manufacturing process have realized standardization and mass, and the maintainability of system and reliability are improved, and scalability is better.
Description
Technical field
The utility model relates to a kind of ocean electrical survey device, especially relates to the measurement mechanism that adopts distributed multichannel synchronousing collection data in the resistivity prospecting of a kind of ocean.
Background technology
Since 1987, Russian geology department carried out the work of D.C. method oil and sulfide mineral products in ocean, designed several up-to-date towing systems, can provide self-potential method (SP) and DC resistivity (DC) to measure.Japan was since 1984, carry out several Marine Electromagnetic Approach (EM) test, wherein once carrying out at Izu-Bonin arc of maximum, from 1986 to 1992, all around the northwest (NW) Pacific Ocean, a typical island arc system is carried out seabed EM observation every year, comprise seabed magnetic survey (OBM) 17 points, seabed electrical measurement (OBE) 4 points.Woods Hole institute of oceanography is also the more mechanism of working in this respect.Such as arranging that 4 OBE have worked 1 year bay, New Jersey stream (Gulf Stream) is lower, carry out electric field and Ocean Surveying (1993 years) with galvanometer and sounding device simultaneously; Design a set of new shallow water EM device, can 1Hz sampling rate have recorded variation, pressure, temperature and 2 tilt component etc. of electric field level component, magnetic vector.Scripps institute of oceanography, geoscience center, the Pacific Ocean, University of Toronto, Cambridge University are devoted to study ocean controllable source electromagnetic method (CSEM) always, approximately since the eighties up to now, the Forward Modeling and Inversion theory of research CSEM, be designed for the instrument of habitata, carry out the test in seabed.
Since the nineties in last century, the units such as China University of Geosciences, Zhongnan Polytechnic Univ, Changchun Univ. of Science & Technology, Tongji University, Zhejiang Oil exploration department add the ranks of marine electromagnetic research, comprise the methods such as mt (MT), be studied work in Tan Hai, offshore area and carried out experimental study in lake region.But in general,, overall work amount is also not very big, and is all in the experimental study stage.Domestic some mechanism has developed experimental prototype, such as Oceanographic Inst. No.1 of State Bureau of Oceanography cooperates with China Geological Univ. Wuhan, develop a set of marine double-frequency and swashed electric electrical survey (-ing) system, but also has a segment distance from productivity (or commerciality) operational phase, mainly there is following problem: first, the signal of multiple passage collections all transmits in a long reception cable, and the core number of cable and diameter have certain limitation, cause the number of channels of data acquisition to be restricted.Number of channels cannot improve the resolution of electrical survey (-ing) at least, and how number of channels can give again the raising difficulty such as the manufacture processing of cable.And unit cable is too slightly oversize, in marine tow operation and transportation, can be damaged unavoidably, once damage, grow and somewhat expensive its servicing time, brings huge risk to operation surveying work.Secondly, once cable manufacture machines, have fixing data acquisition channel quantity and spread of electrodes, will greatly limit the range of application of electrical survey and reduce instrument dirigibility.
Summary of the invention
Exist and singlely long receive cable restriction acquisition channel quantity and damage easy-maintaining not and measure the deficiency that number of channels and receiving electrode distance cannot change in order to overcome existing ocean electrical survey device, the purpose of this utility model is to provide a kind of distributed ocean electrical survey device, this device can not only solve the single long problem mutually restricting between cable and data acquisition channel quantity that receives, and can increase and decrease easily number of channels and the receiving electrode pole span of data acquisition, and be easy to change when cable bad.
The principle of the technical solution of the utility model institute foundation is as follows:
Set up electric field in earth's surface any two points A, B power supply, then measure potential difference (PD) at potential electrode M, N for any two points.The current potential that obtains 2 of M, N according to the current potential formula of point source electric field is:
（1）
（2）
Wherein ρ is ground resistivity,
ifor supply current intensity, U is the measurement current potential that M, N are ordered, and AM, BM, AN, BN are respectively electrode separation.The potential difference (PD) that A, B produce between MN is:
（3）
The computing formula that is obtained even ground resistivity by (3) formula is:
（4）
Wherein
be defined as electrode assembly coefficient.
Distributed ocean of the present utility model electrical survey device, comprise generator, ocean electrical method transmitter, sender electrode, a total node of data acquisition and multiple data acquisition child node, PC host computer and software thereof and be connected in total node and each child node between cable, described each data acquisition child node comprises pressurized capsule and the receiving electrode for waterproof sealing node, generator connects ocean electrical method transmitter and inputs electric energy to it, the voltage that produces and send by PC host computer regulation and control ocean electrical method transmitter, electric current and frequency, send by sender electrode, PC upper computer software sends order to receiving total node, receive and sum up the electric signal of the multiple data acquisition child node of point control synchronous acquisition from receiving electrode, pass the digital electric signal of collection back to PC upper computer software by cable.Voltage, electric current and frequency that ocean electrical method transmitter produces and sends have different combinations, can pass through PC upper computer software regulation and control; Receive total node and do not participate in data collection task, only play the effect of telegon, the normal work of each data acquisition child node in management system under the order of PC data acquisition demonstration and control software.
Individual data gathers child node and is made up of data acquisition circuit plate, receiving electrode, lithium battery, gathers child node and both can, by externally fed, also can, by the powered battery carrying, realize from appearance work.Data acquisition circuit plate adopts multilayer printed circuit board manufacture craft, whole volume is small, can be sealed in the node pressurized capsule of withstand voltage, seawater corrosion resistance of cable splice place design, form " digital cable " with independent measurement function, be the minimum unit of distributed measurement.The cable of each section of regular length comprises a node module and receiving electrode.The cable of multistage equal length or different length can connect by sealing cable junctions, forms one and has the most nearly long cable for data acquisition of 128 data acquisition nodes (passage).Cable plays the effects such as the signal of communication, power supply, connection potential electrode, transmission collection, also possesses certain resistance to tension, to adapt in submarine work simultaneously.Total node and multiple data acquisition node are by the RS-485 bus communication in cable.Under the control of total node, child node synchronous acquisition signal, the result recording deposits large capacity Micro SD card in node in file layout and obtains the apparent resistivity value of survey line by RS-485 Internet Transmission to PC host computer data through processing.If data and command transfer are interrupted or collection child node power failure in the course of the work, gathering child node can also be worked on by the battery carrying, after collection completes, data acquisition shows that controlling software can also read the data of storing in each data acquisition child node online by total node, prevents loss of data.Data acquisition child node circuit adopts 24 analog to digital converter translation circuits of 3 input channels to carry out analog to digital conversion to the signal of 3 passages, the electric signal of exporting from the electrode of adjacent three passages is respectively after front end difference input bias voltage, send into preposition programmable amplifier and amplify, then after the Butterworth LPF of a second order, send in 24 analog to digital converters.Analog to digital converter, under the control of single-chip microcomputer, is converted into digital signal the analog electrical signal gathering, and by spi bus, the data that obtain is stored in large capacity SD card, and is transferred to PC by RS-485 bus network.
The beneficial effects of the utility model are: in the electrical survey (-ing) of ocean, adopt distributed measurement, regular length based on centralized data acquisition before making, the single long cable of stationary conduit number are realized and being combined by multistage stub cable, have become distributed " digital cable "; The design of cable and manufacturing process have realized standardization and mass, and the maintainability of system and reliability are improved, and scalability is better; This device structurally can increase arbitrarily or reduce port number, changes spread of electrodes.In having improved whole receiving system data acquisition density, make instrument become miniaturization and lighting, this has good Practical Performance when operation under marine environment; Data acquisition node is converted to digital signal by signals collecting in bee-line, at utmost avoid simulating signal in transmitting procedure, to be sent interference and the intertrack crosstalk of cable high-power signal, there is higher precision with respect to many signal wire transmission acquisition modes of existing ocean electrical method; Data acquisition child node power supply or with receive in total node communicating interrupt and can be worked on by the battery carrying, do not affect operation.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the utility model device.
Fig. 2 is that the data acquisition of the utility model device shows and the logic diagram of controlling software.
Fig. 3 is the utility model device data acquisition child node logic diagram of circuit.
Fig. 4 is the utility model device data acquisition sub-node operation process logic block diagram.
Embodiment
Below in conjunction with accompanying drawing and by specific embodiment, the utility model is further illustrated.
As shown in Figure 1, distributed measurement device of the present utility model comprises ocean transmitter and receiving system, with the generator that electric energy is provided
,export with transmitter the cable and sender electrode A, the B that are connected
,receiving system comprises PC host computer
,one receives total node, multiple data acquisition child node 1, is respectively child node 1, child node 2, until child node n.Receive between total node and each child node and be connected by cable.
Each data acquisition child node comprises pressurized capsule and the receiving electrode for waterproof sealing node, is sealed with data acquisition circuit plate and lithium battery in pressurized capsule.Gathering child node both can, by externally fed, also can, by the powered battery carrying, realize from appearance work.Data acquisition circuit plate adopts multilayer printed circuit board manufacture craft, and whole volume is small, in sealing section dot encapsulation cabin, forms " digital cable " with independent measurement function, is the minimum unit of distributed measurement.Between described total node, child node, connect by sealing cable junctions.
The course of work of the present utility model is as follows: arrange generator aboard ship, according to surveying needs, select distance and receiving electrode pole span between sender electrode A, B, calculate the length that receives cable, distribute the quantity of different length stub cable, couple together and form the long cable that receives by sealing adaptor, keep the distance between sender electrode B and total node to be put into seabed sending cable and receiving cable, walk transmissions cable and receive the stretching and maintenance of cable point-blank by shipping agency.Select on demand the various combination parameters such as voltage, electric current and frequency that ocean electrical method transmitter sends by PC host computer, and the distance A B of sender electrode A, B, the distance BM0 of sender electrode B and total node, distance M0M1, M1M2 between child node ... be recorded to PC host computer etc. data.The electric energy that generator is produced is delivered to ocean electrical method transmitter.By PC host computer to information such as total node transmitting time calibration information, acquisition parameter setting, channel selecting and gain adjustment, total node sends relevant information to each child node again, control the electric signal of child node synchronous acquisition from receiving electrode, child node exists the information gathering in SD card separately, and transfer data to PC host computer by RS-485 network, upper computer software is processed data, transmission electric current binding with transmitter provides, obtains apparent resistivity value according to formula (4).Original signal waveform and formula resistivity value show with curve, and separately deposit in the file of PC.If data and command transfer are interrupted or collection child node power failure in the course of the work, gathering child node can also be worked on by the battery carrying, after collection completes, PC upper computer software can also read the data of storing in each data acquisition child node online by total node, prevents loss of data.
As shown in Figure 2, the utility model adopts the architecture of stratification, according to stratification system from being longitudinally divided into four ranks: field layer, direct control layer, operation supervise and control layer, administration and supervision authorities.System is on the hardware foundation of data acquisition node, build taking RS-485 fieldbus as basic distributed data acquisition network structure model, its each layer function is as follows: the field layer being made up of data acquisition child node is the basis of data acquisition system (DAS), and the multiple data acquisition child nodes that are distributed in trailing cable are directly responsible for data collection task.Child node is only accepted the order of total node, does not link up each other; The direct control layer that total node forms is the control key of distributed data acquisition system, total node is a unit of forming a connecting link, under it, be connected with each data acquisition child node, its Main Function is the normal work of being in charge of whole collection network, comprising: system powers on, starts/close data acquisition, collection synchronizing signal is provided, collects and forwards image data (being transmitted to PC host computer), fault handling etc.; On it, be connected with upper computer software, accept and forward various information and the order of administration and supervision authorities; The operation supervise and control layer being made up of upper computer software and PC is the control center of distributed data acquisition system, the work of method for power supplying survey crew service data acquisition system, and make on-the site analysis and fault eliminating; The administration and supervision authorities of distributed system comprise layer of production management and decision-making management layer, form by measuring operating personnel.
PC host computer provides the interface of a human to user, the whole network of distributed data acquisition is under water managed and monitored.Measure operating personnel by operating the initial of PC host computer procedure control data acquisition, metering system and distributed data acquisition system under water carry out that data transmission and order issue etc., finally read original electric signal from data acquisition node, the various Frames that occur between host computer background process upper computer software and distributed capture system, comprise that order sends, order is replied, command catalog processing, eject the contents such as dialog box and the data that transmit are carried out after computing calculating apparent resistivity value, finally show intuitively with curve, the apparent resistivity value obtaining is stored into file, for operations such as further electrical method invertings.
As shown in Figure 3, data acquisition child node circuit is made up of data acquisition circuit plate, receiving electrode, lithium battery, waterproof sealing cabin and cable, wherein data acquisition circuit plate adopts 24 analog to digital converter translation circuits of 3 input channels to carry out analog to digital conversion to the signal of 3 passages, the electric signal of exporting from the electrode of adjacent three passages is respectively after front end difference input bias voltage, send into preposition programmable amplifier and amplify, then after the Butterworth LPF of a second order, send in 24 analog to digital converters.Analog to digital converter, under the control of single-chip microcomputer, is converted into digital signal the analog electrical signal gathering, and by spi bus, the data that obtain is stored in large capacity SD card, and is transferred to PC by RS-485 bus network.
As shown in Figure 4, the software of data acquisition child node is carried out by child node single-chip microcomputer master control core, mainly comprises the subroutine such as programme-controlled gain adjustment and signalling channel selection, A/D initialization setting and result reads, parameter setting, Clockreading, FAT16 file system management, communication.After node powers on, program enters initialization subfunction, mainly comprises that system clock initialization, serial ports initialization, Micro SD card detect and initialization.After completing, initialization reads the operational parameter value existing in power down preventing storer, the running status while judging last time power down.If be improper reset in working order time last time, system directly enters duty, waits for that serial ports interrupts occurring otherwise enter dormancy.Serial ports is had no progeny in producing, and program can be made following three kinds of tasks: parameter setting, file read, enter work.The program exit of three kinds of tasks is all to turn back to continue to wait for that serial ports interrupts, until next task produces.
Claims (5)
1. a distributed ocean electrical survey device, it is characterized in that comprising generator, ocean electrical method transmitter, sender electrode, one receives total node and multiple data acquisition child node, PC host computer and software thereof and be connected in total node and each child node between cable, generator connects ocean electrical method transmitter and inputs electric energy to it, the voltage that produces and send by PC host computer regulation and control ocean electrical method transmitter, electric current and frequency, send by sender electrode, PC upper computer software sends order to receiving total node, receive and sum up the electric signal of the multiple data acquisition child node of point control synchronous acquisition from receiving electrode, pass the digital electric signal of collection back to PC upper computer software by cable.
2. device according to claim 1, is characterized in that described each data acquisition child node comprises pressurized capsule and the receiving electrode for waterproof sealing node.
3. device according to claim 1, is characterized in that connecting by sealing cable junctions between described total node, child node.
4. device according to claim 2, is characterized in that described pressurized capsule comprises data acquisition circuit plate and lithium battery.
5. device according to claim 4, it is characterized in that described data acquisition circuit adopts 24 analog to digital converter translation circuits of 3 input channels to carry out analog to digital conversion to the signal of 3 passages, the electric signal of exporting from the electrode of adjacent three passages is respectively after front end difference input bias voltage, send into preposition programmable amplifier and amplify, then after the Butterworth LPF of a second order, send in 24 analog to digital converters; Analog to digital converter, under the control of single-chip microcomputer, is converted into digital signal the analog electrical signal gathering, and by spi bus, the data that obtain is stored in large capacity SD card, and is transferred to PC by RS-485 bus network.
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| CN201420342017.0U CN203930089U (en) | 2014-06-25 | 2014-06-25 | A kind of distributed ocean electrical survey device |
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| CN201420342017.0U CN203930089U (en) | 2014-06-25 | 2014-06-25 | A kind of distributed ocean electrical survey device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199113A (en) * | 2014-06-25 | 2014-12-10 | 国家海洋局第一海洋研究所 | Distributed ocean power generation method measuring method and device |
| CN106504493A (en) * | 2016-11-04 | 2017-03-15 | 珠海国勘仪器有限公司 | A kind of electrical prospecting distribution cable data transmission system |
| 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 |
| CN114993380A (en) * | 2022-06-06 | 2022-09-02 | 中国海洋大学 | Multi-parameter monitoring sensing array and method for seabed shallow gas accumulation and overflow process |
-
2014
- 2014-06-25 CN CN201420342017.0U patent/CN203930089U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199113A (en) * | 2014-06-25 | 2014-12-10 | 国家海洋局第一海洋研究所 | Distributed ocean power generation method measuring method and device |
| CN106504493A (en) * | 2016-11-04 | 2017-03-15 | 珠海国勘仪器有限公司 | A kind of electrical prospecting distribution cable data transmission system |
| CN106504493B (en) * | 2016-11-04 | 2022-05-10 | 珠海国勘仪器有限公司 | Distributed cable data transmission system for electrical prospecting |
| 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 |
| CN114993380A (en) * | 2022-06-06 | 2022-09-02 | 中国海洋大学 | Multi-parameter monitoring sensing array and method for seabed shallow gas accumulation and overflow process |
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