CN205139386U - Time frequently aerial collection system of electromagnetic survey data and system - Google Patents
Time frequently aerial collection system of electromagnetic survey data and system Download PDFInfo
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- CN205139386U CN205139386U CN201520828912.8U CN201520828912U CN205139386U CN 205139386 U CN205139386 U CN 205139386U CN 201520828912 U CN201520828912 U CN 201520828912U CN 205139386 U CN205139386 U CN 205139386U
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Abstract
The embodiment of the application provides time frequently aerial collection system of electromagnetic survey data and system, this system include when a plurality of the aerial collection system of electromagnetic survey data frequently to and it is a plurality of according to presetting the rule that the distributes controllable electromagnetic field excitaton source of ground face length pole span in the exploration targets region that distributes. Whenever collection system includes: the time electromagnetism data acquisition station frequently for the collection excites the seismic data who generates because of the controllable electromagnetic field excitaton source of ground face length pole span, an aircraft that frequency electromagnetism data acquisition station when is used for the suspended load, the electric -field sensors of a plurality of group mutually orthogonal, its through the electric field data channel that corresponds with the time frequently the controller at electromagnetism data acquisition station link to each other for gather two weights or three -component electric field data in the exploration targets region, the magnetic field sensor of three -component, its through the electromagnetism data channel that corresponds with the system ware links to each other for gather the three -component magnetic field data in the exploration targets region. This application embodiment has reduced electromagnetic survey data acquisition's field source effect, convenient high efficiency.
Description
Technical field
The application relates to technical field of geophysical exploration, especially relates to a kind of time-frequency electromagnetic survey data airborne acquisition Apparatus and system.
Background technology
Geophysical exploration method mainly contains the method for exploration such as seismic method, DC electrical method, magnetic method, gravitational method and electromagnetic method.Wherein electromagnetic method is also known as " inductive electromagnetic method ", according to rock or the electric conductivity of ore and the difference of magnetic conductivity, utilizes electromagnetic induction principle to carry out the method for exploration prospecting, is referred to as electromagnetic method.
Traditional electromagnetic method utilizes natural field source, does not therefore need the laying considering field source.The controllable source audio frequency electromagnetic exploration method of current widespread use and long skew transient electromagnetic method of exploration are all only laid one and are excited field source, can only receive in field source annex certain limit, when the excitation energy of a field source can not meet the signal to noise ratio (S/N ratio) requirement of acceptance point signal, correct position is just selected again to lay field source.There is series of problems in the single signal of field source that excites: first, due to the complicacy of underground structure, and the exciting field in diverse location or orientation can produce notable difference due to the electromagnetic field transmitting procedure acceptance point that do not coexist; Second, source of leaving the theatre is far and near different, and the field signal composition difference being arrived acceptance point by ground, aerial and underground is very large, therefore, acceptance point obtains field source characteristic and there are differences, such as near region, is mainly underground and goes directly wave field, and far field is mainly from ground or airborne plane wave, therefore, the signal received seriously affects by non-exploration targets, between near region and far field, also there is zone of transition, and its electromagnetic nature is more complicated; Therefore, traditional controllable source electromagnetic prospecting usually because Source effects can not be eliminated its effect very well and have a greatly reduced quality, even produces error result.
In addition, current electromagnetic method collecting device used be all be laid in ground, under the surface conditions of current difficulty with a varied topography, the laying constructional difficulties of collecting device, thus be unfavorable for the collection of geological data.
Utility model content
The object of the embodiment of the present application is to provide a kind of Source effects reducing Electromagnetism of Earthquake joint exploration, and is convenient to the time-frequency electromagnetic survey data airborne acquisition Apparatus and system of earthquake data acquisition.
For achieving the above object, on the one hand, the embodiment of the present application provides a kind of time-frequency electromagnetic survey data airborne acquisition device, comprising:
Time-frequency electromagnetic data acquisition station, the geological data generated for gathering multiple electric field excitation source excitation;
For hanging the aircraft carrying described time-frequency electromagnetic data acquisition station;
Some groups of mutually orthogonal electric-field sensors, it is connected with the controller of described time-frequency electromagnetic data acquisition station by corresponding electric field data passage, for gathering two components in exploration targets region or three-component electric field data;
Three-component magnetic field sensor, it is connected with described device processed, for gathering the three-component magnetic field data in described exploration targets region by corresponding electromagnetic data passage.
On the other hand, the embodiment of the present application also provides a kind of time-frequency electromagnetic survey data airborne acquisition system, it comprises several time-frequency electromagnetic survey data airborne acquisition devices, and several are distributed in the face length pole span controllable electromagnetic field excitation source, ground in exploration targets region by default distribution rule; Wherein, each time-frequency electromagnetic survey data airborne acquisition device comprises:
Time-frequency electromagnetic data acquisition station, for gathering the geological data generated because of described ground face length pole span controllable electromagnetic field excitation source excitation;
For hanging the aircraft carrying described time-frequency electromagnetic data acquisition station;
Some groups of mutually orthogonal electric-field sensors, it is connected with the controller of described time-frequency electromagnetic data acquisition station by corresponding electric field data passage, for gathering two components in described exploration targets region or three-component electric field data;
Three-component magnetic field sensor, it is connected with described device processed, for gathering the three-component magnetic field data in described exploration targets region by corresponding electromagnetic data passage.
The time-frequency electromagnetic data airborne acquisition device of the application has multiple electromagnetic field data acquisition channel and realizes an equipment and possess three-component electric field data simultaneously and gather and three-component magnetic field data collection integrated, comprehensive can be carried out to underground geologic objective to launch and excitation, thus can reduce by the single Source effects exciting field source to cause, and the time-frequency electromagnetic data airborne acquisition device of the application does not need at surface deployment wireless time-frequency electromagnetic data acquisition station, non-polarizing electrode to three-component magnetic field sensor, avoid the problem brought because of distribution with a varied topography, be convenient to very much the collection of data.In addition, the time-frequency electromagnetic data airborne acquisition device of the application is mobile very fast and simple aloft, drastically increases production efficiency.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present application, forms the part of the embodiment of the present application, does not form the restriction to the embodiment of the present application.In the accompanying drawings:
Fig. 1 is the structural representation of the time-frequency electromagnetic survey data airborne acquisition device of the application's embodiment;
Fig. 2 is the structural representation of the time-frequency electromagnetic survey data airborne acquisition system of the application's embodiment;
Fig. 3 a ~ 3c is the resistivity measurement equivalent-circuit model of the capacitive battery field sensor in the time-frequency electromagnetic survey data airborne acquisition system of the application's embodiment;
Fig. 4 a ~ 4c is the structural representation of the capacitive battery field sensor in the time-frequency electromagnetic survey data airborne acquisition system of the application's embodiment;
Fig. 5 is the process flow diagram of the collecting method of the time-frequency electromagnetic survey data airborne acquisition system of the application's embodiment.
Embodiment
For making the object of the embodiment of the present application, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the embodiment of the present application is described in further details.At this, the schematic description and description of the embodiment of the present application for explaining the embodiment of the present application, but not as the restriction to the embodiment of the present application.
Below in conjunction with accompanying drawing, the embodiment of the embodiment of the present application is described in further detail.
Shown in figure 1, the time-frequency electromagnetic survey data airborne acquisition device of the embodiment of the present application comprises:
Wireless time-frequency electromagnetic data acquisition station, the geological data generated for gathering multiple electric field excitation source excitation, such as gathers three-component time-frequency electromagnetic data according to fixed point on the coordinate position of two-dimentional survey line or three-dimensional grid;
For hanging the aircraft carrying described wireless time-frequency electromagnetic data acquisition station, this wireless time-frequency electromagnetic data acquisition station is arranged in the air, can have the impact avoiding orographic factor, thus be convenient to the collection of geological data;
Some groups of mutually orthogonal electric-field sensors, it is connected with the controller of described wireless time-frequency electromagnetic data acquisition station by corresponding electric field data passage, for gathering two components in exploration targets region (land exploration targets region) or three-component electric field data; Such as tool two groups or three groups of mutually orthogonal condenser type non-polarizing electrodes are to (EX, EY or EZ), the right length of the often pair of condenser type non-polarizing electrode is about 10 meters (being generally not less than 10 meters), it is connected with the controller of wireless time-frequency electromagnetic data acquisition station, for gathering two components (EX, EY) or three-component (EX, EY, EZ) electric field data in exploration targets region by corresponding electric field data passage;
Three-component magnetic field sensor, it is connected with described device processed, for gathering the three-component magnetic field data in described exploration targets region by corresponding electromagnetic data passage.
In the embodiment of the present application, three-component magnetic field sensor can be that three mutually orthogonal magnetic field sensors (HX, HY, HZ) form three-component magnetic field sensor, it is connected with the controller of wireless time-frequency electromagnetic data acquisition station, for gathering the three-component magnetic field data in described exploration targets region by corresponding magnetic field data passage.
In the embodiment of the present application, aircraft can be helicopter or depopulated helicopter.
For convenience of controlling, above-mentioned wireless time-frequency electromagnetic data acquisition station preferred wireless remote control time-frequency electromagnetic data acquisition station, it comprises a GPS receiving antenna, a wireless data transceiving antenna (such as WiFi or bluetooth etc.).
In the embodiment of the present application, above-mentioned each electromagnetic data passage is by the prime amplifier of a high sensitivity, low noise, low drifting, low-power consumption, 32 analog to digital converters, a storer (flash card), and ensure the independently power supply composition that each electromagnetic data passage normally works.Wherein:
Prime amplifier, for by the condenser type non-polarizing electrode of correspondence to or the simulating signal that collects of magnetic field sensor carry out enlarge leadingly process, obtain the simulating signal of amplifying;
Analog to digital converter, for the simulate electric field of amplification or field signal are carried out analog to digital conversion, obtains the digital signal being suitable for the controller process of wireless time-frequency electromagnetic data acquisition station;
Storer, for preserving digital signal under the control of wireless time-frequency electromagnetic data acquisition station controller.
In the embodiment of the present application, above-mentioned non-polarizing electrode all covers the frequency band range in controllable electromagnetic field excitation source and the frequency band range of nagneto-telluric field to the frequency response scope with magnetic field sensor.In addition, due to the impossible ground connection of the electrode pair on wireless time-frequency electromagnetic data acquisition station, so the embodiment of the present application can only by condenser type non-polarizing electrode to the electric field component at low latitude one-point measurement inducted secondary field.
As can be seen here, the time-frequency electromagnetic data airborne acquisition device of the embodiment of the present application has 6 electromagnetic field data acquisition channels, and (3 for electric field data collection, 3 for magnetic field data collection), realize an equipment possess simultaneously three-component electric field data gather and three-component magnetic field data collection integrated, and do not need at surface deployment wireless time-frequency electromagnetic data acquisition station, non-polarizing electrode to three-component magnetic field sensor.In addition, the movement of time-frequency electromagnetic data airborne acquisition device aloft along survey line is also very fast and simple, drastically increases production efficiency.
In the embodiment of the present application, above-mentioned electric-field sensor can comprise capacitive battery field sensor.Described capacitive battery field sensor comprises the square cavity (in the other embodiment of the application, also can adopt other parallelepipedons such as rectangle) that six blocks of square-shaped metal plates are put together.Wherein be coupled composition X-direction horizontal component of electric field sensor, the parallel relative square-shaped metal plate in two blocks, front and back of the two blocks of parallel relative square-shaped metal plates in left and right is coupled composition Y-direction horizontal component of electric field sensor, upper and lower two pieces of parallel relative square-shaped metal plates composition Z-direction vertical electric field sensors.Fig. 3 a ~ 3c is the resistivity measurement equivalent-circuit model of capacitive battery field sensor, and resistivity measurement receiving system is equivalent to circuit network by it.Wherein, in fig. 3 a, electrode is equivalent to impedance Z
p1, Z
p2, the earth is equivalent to impedance Z
earth.So, there is the flowing of electric current in non-polarizing electrode, non-polarizing electrode can be equivalent to resistance R because of the ion-exchange in electrode and electrolyte solution
p, as shown in Figure 3 b; Capacitance electrode because of electrode with the earth directly do not contact, electrode induction obtain identical with the earth electricity, opposite polarity electric charge, capacitance electrode can be equivalent to electric capacity C
p, as shown in Figure 3 c.
Suppose that the current potential at potential electrode place is respectively
the input impedance of testing circuit is Z
in, the testing circuit input voltage Δ V when using non-polarizing electrode
rfor:
When using capacitance electrode, testing circuit input voltage is:
For operating angle frequency, as the Z that satisfies condition
in> > 1/ (j ω C
p), Z
in> > R
ptime,
compared with non-polarizing electrode, capacitance electrode is without the need in placing into the soil electrode, without the need to watering salt solution to ensure the exchange of ion, more convenient in use.But can see equally, the measurement result of capacitance electrode and operating angle frequency dependence, when angular frequency reduces, the equiva lent impedance of coupling capacitance increases, and testing circuit input impedance not infinitely-great value, certainly exist lower-frequency limit and make capacitance electrode cannot obtain effective measurement result.
In some embodiments of the application, capacitance electrode can have two kinds of forms: wire antenna and flat board-wire antenna.Wire antenna form as shown in fig. 4 a, uses coaxial cable to serve as antenna, forms electric capacity between cable and the earth; Flat board-wire antenna structure then not only cable can form electric capacity, metal plate also forms electric capacity, and the total capacitance of electrode is equivalent to the parallel connection of the electric capacity that cable and metal plate are formed, as shown in Figure 4 b.In addition, in other embodiments of the application, low frequency capacitive electrode can also adopt version as illustrated in fig. 4 c: use metal plate to serve as receiving electrode, at earth electric field effect bottom electrode induced charge, be voltage signal by the preposition testing circuit that is positioned at electrode place by charge conversion, carry out data acquisition through cable to acquisition station.
Shown in composition graphs 2, the time-frequency electromagnetic survey data airborne acquisition system of the embodiment of the present application comprises:
Comprise the time-frequency electromagnetic survey data airborne acquisition device that several are above-mentioned, and several are distributed in the face length pole span controllable electromagnetic field excitation source, ground in exploration targets region by default distribution rule.
Below the time-frequency electromagnetic survey data airborne acquisition system of the embodiment of the present application is specifically described:
When carrying out three-dimensional six components (three electric three magnetic) controllable source time-frequency electromagnetic survey to underground reservoir targets, above subsurface reservoir target, (i.e. exploration targets region) lays three-dimensional survey line, above-mentioned time-frequency electromagnetic data airborne acquisition device 1 is laid by Construction Design Schemes along three-dimensional survey line, lay four mutually perpendicular long pole span levels around this exploration targets region and excite electric dipole current source 2, excite electric dipole current source 2 to provide the high-power square wave current 4 of different frequency by more than 250 kilowatts high power electric power supply systems 3 to level.Three-dimensional controllable source electromagnetic data is gathered, if represent electromagnetism excitation field source with AB, four levels are excited electric dipole current source 2 respectively called after A1B1, A2B2, A3B3, A4B4 by us, and these four levels excite that electric dipole current source is end to end surrounds foursquare four orientation electromagnetism excitation field sources.Wherein, four levels excite adjacent two pairs of transmitting electrodes in electric dipole current source 2 to share a ground-electrode, can save the layout of ground-electrode like this, improve data acquisition efficiency.In addition, due to the underground geologic bodies buried depth very large (several kilometers dark) of detection, the induction secondary electromagnetic field signal amplitude that miniwatt level excites electric dipole current source to excite in subsurface reservoir target is very little, the time-frequency electromagnetic data airborne acquisition device of aerial laying does not collect effective inducted secondary field signal, therefore, only have and select the level of large power long pole span to excite electric dipole current source could improve the amplitude of the secondary electromagnetic field signal that it excites, improve the signal to noise ratio (S/N ratio) of signal.
According to the degree of depth and the size of the land subsurface reservoir target of research, design four orientation and cover activating system, because its primary field excited greatly can affect too by force the induction field (secondary field) that when time-frequency electromagnetic survey data airborne acquisition device 1 measurement level excites electric dipole current source 2 (primary field) power-off, underground geologic bodies produces near the excitaton source, so wireless remote control time-frequency electromagnetic data airborne acquisition device 1 will be laid in dried up flatly to excite beyond electric dipole current source 2 certain distance.Time-frequency electromagnetic survey data airborne acquisition device 1 is not laid, so the side length of four orientation electromagnetism excitation field sources is than the geologic body length (i.e. exploration targets region strike length) long 10% ~ 20% needing detection owing to exciting near electric dipole current source 2 near level.In addition, for ensureing to cover the survey data of large scale geologic body, when exploration targets region strike length is greater than preseting length, then the multiple four orientation electromagnetism excitation field sources of configuration are needed to cover exploration targets region successively.The length of side such as supposing four orientation electromagnetism excitation field sources is 10 kilometers, if exploration targets region strike length is greater than 8 kilometers, then needs to lay two or more four orientation electromagnetism excitation field sources, wants overlapping 20% area between every two four orientation electromagnetism excitation field sources.
In the embodiment of the present application, each time-frequency electromagnetic survey data airborne acquisition device 2 has 6 electromagnetic data acquisition channels, can be used for synchro measure simple component, two components, three-component, four components, five components or six component electromagnetic field data, five component electromagnetic field data are respectively horizontal electric field component EX, the EY parallel with vertical with field source AB, horizontal component ofmagnetic field HX, HY and the magnetic-field component HZ perpendicular to ground.Six component electromagnetic field data are respectively horizontal electric field component EX, the EY parallel with vertical with field source AB, perpendicular to the electric field component EZ on ground, and horizontal component ofmagnetic field HX, HY and the magnetic-field component HZ perpendicular to ground.
In the time-frequency electromagnetic survey data airborne acquisition system of the embodiment of the present application, in exploration targets region, the three-dimensional all time-frequency electromagnetic data airborne acquisition devices 1 laid are the time-frequency electromagnetic signals that same one-step site gathers each long pole span level and excites electric dipole current source 2 to excite, and then gather the time-frequency electromagnetic signal that next long pole span level excites electric dipole current source 2 to excite, complete the data collection task to the time-frequency electromagnetic signal that long pole span levels all in exploration targets region excite electric dipole current source 2 to excite successively.The level in four orientation excites electric dipole current source 2 also sequentially to excite successively.
The time-frequency electromagnetic survey data airborne acquisition system acquisition of the embodiment of the present application to time-frequency electromagnetic data can enter into Installed System Memory storage, also ground or airborne data processing centre (DPC) be can be sent in real time by communication, follow-up process and integrated interpretation carried out.
Time-frequency electromagnetic survey data airborne acquisition system due to the embodiment of the present application can be carried out comprehensive to underground geologic objective and be launched and excitation, thus can eliminate by the single Source effects exciting field source to cause.
Shown in Fig. 5, the collecting method of the time-frequency electromagnetic survey data airborne acquisition system of the embodiment of the present application is comprised the following steps:
Step a, excite a controllable electromagnetic field excitation source in several controllable electromagnetic field excitation sources.
Step b, the time-frequency electromagnetic signal that several these controllable electromagnetic field excitation source excitations of time-frequency electromagnetic survey data airborne acquisition device synchronous acquisition are gone out.
Step c, repetition above-mentioned steps, until complete exciting and gathering of controllable electromagnetic field excitation sources all in several controllable electromagnetic field excitation sources described successively.
The time-frequency electromagnetic data airborne acquisition device of the application has multiple electromagnetic field data acquisition channel and realizes an equipment and possess three-component electric field data simultaneously and gather and three-component magnetic field data collection integrated, comprehensive can be carried out to underground geologic objective to launch and excitation, thus can reduce by the single Source effects exciting field source to cause, and the time-frequency electromagnetic data airborne acquisition device of the application does not need at surface deployment wireless time-frequency electromagnetic data acquisition station, non-polarizing electrode to three-component magnetic field sensor, avoid the problem brought because of distribution with a varied topography, be convenient to very much the collection of data.In addition, the time-frequency electromagnetic data airborne acquisition device of the application is mobile very fast and simple aloft, drastically increases production efficiency.
Above-described specific embodiment; the object of the application, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the embodiment of the present application; and be not used in the protection domain limiting the application; within all spirit in the application and principle, any amendment made, equivalent replacement, improvement etc., within the protection domain that all should be included in the application.
Claims (17)
1. a time-frequency electromagnetic survey data airborne acquisition device, is characterized in that, comprising:
Time-frequency electromagnetic data acquisition station, the geological data generated for gathering multiple electric field excitation source excitation;
For hanging the aircraft carrying described time-frequency electromagnetic data acquisition station;
Some groups of mutually orthogonal electric-field sensors, it is connected with the controller of described time-frequency electromagnetic data acquisition station by corresponding electric field data passage, for gathering two components in exploration targets region or three-component electric field data;
Three-component magnetic field sensor, it is connected with described device processed, for gathering the three-component magnetic field data in described exploration targets region by corresponding electromagnetic data passage.
2. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, it is characterized in that, described time-frequency electromagnetic data acquisition station has the seismoreceiver of several three-component seismoreceivers or at least three simple components, described seismoreceiver is connected with the controller of described time-frequency electromagnetic data acquisition station by corresponding geological data passage, the three-component generated because of ground face length pole span controllable electromagnetic field excitation source excitation for correspondence collection or the geological data of simple component.
3. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, it is characterized in that, described electric-field sensor comprises capacitive battery field sensor.
4. time-frequency electromagnetic survey data airborne acquisition device according to claim 3, it is characterized in that, described capacitive battery field sensor comprises the parallelepipedon that six pieces of sheet metals are put together, wherein, the parallel relative sheet metal in two pieces, left and right is coupled and forms X-direction horizontal component of electric field sensor, the parallel relative sheet metals in two pieces, front and back are coupled and form Y-direction horizontal component of electric field sensor, and upper and lower two pieces of parallel relative sheet metals are coupled and form Z-direction vertical electric field sensor.
5. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, it is characterized in that, described aircraft is helicopter or depopulated helicopter.
6. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, is characterized in that, described electric field data passage and described magnetic field data passage include:
Prime amplifier, carries out enlarge leadingly process for the simulating signal electric-field sensor of correspondence or magnetic field sensor collected, and obtains the simulating signal of amplifying;
Analog to digital converter, for the simulating signal of described amplification is carried out analog to digital conversion, obtains the digital signal being suitable for described device process processed;
Storer, for preserving described digital signal under the control of described device processed.
7. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, it is characterized in that, described electric-field sensor is condenser type non-polarizing electrode pair, and described magnetic field sensor is fluxgate type or line of induction ring type magnetic field sensor.
8. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, it is characterized in that, the frequency response scope of described electric-field sensor covers the frequency band range in controllable electromagnetic field excitation source and the frequency band range of the earth or Natural electromagnetic field, and the frequency response scope of described magnetic field sensor covers the frequency band range in controllable electromagnetic field excitation source and the frequency band range of nagneto-telluric field.
9. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, is characterized in that, each described Electric and magnetic fields data channel is all configured with an independently power supply.
10. time-frequency electromagnetic survey data airborne acquisition device according to claim 1, is characterized in that, described electromagnetic data acquisition station is wireless remote control electromagnetic data acquisition station.
11. 1 kinds of time-frequency electromagnetic survey data airborne acquisition systems, it is characterized in that, comprise several time-frequency electromagnetic survey data airborne acquisition devices, and several are distributed in the face length pole span controllable electromagnetic field excitation source, ground in exploration targets region by default distribution rule; Wherein, each time-frequency electromagnetic survey data airborne acquisition device comprises:
Time-frequency electromagnetic data acquisition station, for gathering the geological data generated because of described ground face length pole span controllable electromagnetic field excitation source excitation;
For hanging the aircraft carrying described time-frequency electromagnetic data acquisition station;
Some groups of mutually orthogonal electric-field sensors, it is connected with the controller of described time-frequency electromagnetic data acquisition station by corresponding electric field data passage, for gathering two components in described exploration targets region or three-component electric field data;
Three-component magnetic field sensor, it is connected with described device processed, for gathering the three-component magnetic field data in described exploration targets region by corresponding electromagnetic data passage.
12. time-frequency electromagnetic survey data airborne acquisition systems according to claim 11, it is characterized in that, several surface controllable electric field excitation sources described are that four long pole span levels excite electric dipole current source, the length of each current source is not less than 10 kilometers, and these four levels excite that electric dipole current source is end to end surrounds foursquare four orientation electromagnetism excitation field sources.
13. time-frequency electromagnetic survey data airborne acquisition systems according to claim 12, is characterized in that, described four levels excite adjacent two electrode couple current source supply electrodes in electric dipole current source to share a ground-electrode.
14. time-frequency electromagnetic survey data airborne acquisition systems according to claim 12, is characterized in that, described four levels excite exploration targets region strike length large 10% ~ 20% described in the end to end foursquare side ratio surrounded of electric dipole current source.
15. time-frequency electromagnetic survey data airborne acquisition systems according to claim 12, is characterized in that, when described exploration targets region strike length is greater than preseting length, configures multiple four orientation electromagnetism excitation field sources and cover exploration target area successively.
16. time-frequency electromagnetic survey data airborne acquisition systems according to claim 12, is characterized in that, the area of overlap 20% between two four orientation electromagnetism excitation field sources adjacent in described multiple four orientation electromagnetism excitation field sources.
17. time-frequency electromagnetic survey data airborne acquisition systems according to claim 11, is characterized in that, described default distribution rule comprises square formation distribution.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301663A (en) * | 2015-10-23 | 2016-02-03 | 中国石油天然气集团公司 | Time-frequency electromagnetic exploration data air acquisition device and system |
| CN109270579A (en) * | 2018-10-29 | 2019-01-25 | 中国有色金属工业昆明勘察设计研究院有限公司 | Transient electromagnetic reception device for small-sized more rotor low latitudes unmanned plane |
| CN109342978A (en) * | 2018-11-06 | 2019-02-15 | 中国石油天然气集团有限公司 | Magnetotelluric anisotropy acquisition system, method and apparatus |
-
2015
- 2015-10-23 CN CN201520828912.8U patent/CN205139386U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301663A (en) * | 2015-10-23 | 2016-02-03 | 中国石油天然气集团公司 | Time-frequency electromagnetic exploration data air acquisition device and system |
| CN109270579A (en) * | 2018-10-29 | 2019-01-25 | 中国有色金属工业昆明勘察设计研究院有限公司 | Transient electromagnetic reception device for small-sized more rotor low latitudes unmanned plane |
| CN109342978A (en) * | 2018-11-06 | 2019-02-15 | 中国石油天然气集团有限公司 | Magnetotelluric anisotropy acquisition system, method and apparatus |
| CN109342978B (en) * | 2018-11-06 | 2021-03-30 | 中国石油天然气集团有限公司 | Magnetotelluric anisotropy acquisition system, magnetotelluric anisotropy acquisition method and magnetotelluric anisotropy acquisition equipment |
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