CN105974487A - Device and method for performing full-area measurement on electric field component Ephi of current source frequency domain - Google Patents
Device and method for performing full-area measurement on electric field component Ephi of current source frequency domain Download PDFInfo
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- CN105974487A CN105974487A CN201610406831.8A CN201610406831A CN105974487A CN 105974487 A CN105974487 A CN 105974487A CN 201610406831 A CN201610406831 A CN 201610406831A CN 105974487 A CN105974487 A CN 105974487A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
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Abstract
The invention provides a device and a method for performing full-area measurement on an electric field measurement on an electric field component Ephi of a current source frequency domain. The device comprises a transmitting power supply, a single-frequency or 2<n>-sequence pseudo random multifrequency current transmitter, two power supply electrodes and at least one set of electromagnetic receiving equipment. The transmitting power supply is connected with the single-frequency or 2<n>-sequence pseudo random multifrequency current transmitter. The single-frequency or 2<n>-sequence pseudo random multifrequency current transmitter is connected with the two power supply electrodes. The two power supply electrodes are arranged correspondingly with the electromagnetic receiving equipment. The current transmitter converts electric energy which is generated by the transmitting power supply to a single-frequency or 2n-sequence pseudo random multifrequency current signal and transmits the single-frequency or 2<n>-sequence pseudo random multifrequency current signal to the two power supply electrodes. The two power supply electrodes transmit the single-frequency or 2<n>-sequence pseudo random multifrequency current signal to a target area of ground. At least one set of electromagnetic receiving equipment receives a single-frequency or multiple-frequency Ephi electric field response from the ground. According to the device and the method, because only the Ephi is measured, full-area measurement can be realized, thereby expanding frequency domain sounding range and having no requirement for multiple times of movement of the transmitting power supply.
Description
Technical field
The present invention relates to the electromagnetic sounding technical field in Key words exploration geophysics field, particularly relate to one
Plant whole district's measuring current source frequency domain electric field componentDevice and method.
Background technology
In generation nineteen fifty, just the Carniard of the Tikhonov of the former Soviet Union and France separately carried
Go out to measure mutually orthogonal electric field and magnetic field calculates apparent resistivity greatly, establish the earth electricity
The theoretical basis of magnetic method (MT).MT have utilize natural field source, use Plane wave theory and
The advantages such as investigation depth is big, but also have weak output signal and the random shortcoming of field source simultaneously.
Magnetotelluric method was improved by Goldtein in 1971, proposed to use artificial field source
Replacing natural field source, (far field, the detection of generally 9 times is deep in the area far at distance field source
Degree) measure, thus have also been obtained Carnot model formula and (need to believe with electric field response
Number and magnetic responsiveness signal calculate), define controlled-source audiomagnetotellurics method (CSAMT).
CSAMT overcomes the shortcoming that MT field source is random and signal is weak, but it requires to measure in far field,
And still use Ka Niya formula to calculate apparent resistivity, give up many height representing non-far field feature
Secondary item, introduces no small personal error.
E-ExWide area electromagnetic method can be measured in non-far field, and its investigative range has than CSAMT
No small extension so that depth measurement can be carried out in the non-far field of certain area, identical transmitting-receiving away from time
The degree of depth that can explore increases, i.e. detect same even depth can with less transmitting-receiving away from, but due to E-Ex
The character of itself, such as ExZero band distributing position, cause the waste of portion of energy information, this
Sample is when large-area oil-gas exploration or geologic survey, owing to survey line is the longest, needs repeatedly to move
Emission source, certainly will bring a lot of inconvenience.
Summary of the invention
The present invention provides a kind of and overcomes the problems referred to above or solve the one of the problems referred to above at least in part
Plant whole district's measuring current source frequency domain electric field componentDevice and method.
First aspect, the present invention provides a kind of whole district measuring current source frequency domain electric field component's
Device, including: send power supply, single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, two
Current electrode, at least one electromagnetism receive equipment；
Described transmission power supply connects described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, institute
State single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter connects said two current electrode, described
Two current electrodes receive equipment with described electromagnetism and are correspondingly arranged；
Described transmission power supply, is used for as described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter
Conveying electric energy；
Described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, for by described transmission power supply
The electric energy produced is converted into single-frequency or 2nSequence pseudorandom multi-frequency current signal, and by described single-frequency
Or 2nSequence pseudorandom multi-frequency current signal is sent to said two current electrode；
Said two current electrode, for by described single-frequency or 2nSequence pseudorandom multi-frequency electric current is believed
Number send to target area greatly；
Described at least one electromagnetism receives equipment, for receive the target area of described the earth according to
Described single-frequency or 2nThe electric field of one or more frequencies of sequence pseudorandom multi-frequency current signal feedback
ComponentResponse signal；Described electric field componentResponse signal for be perpendicular to measuring point position and
The electric field component response signal of two current electrode lines of centres.
Preferably, described device also includes: processing means；
Described processing means, at least one electromagnetism receives equipment described in connection；
Described at least one electromagnetism receives equipment, is additionally operable to the electricity of the one or more frequency
Field componentResponse signal be sent to described processing means；
Described processing means, for the electric field component according to the one or more frequencySound
Induction signal, calculates the apparent resistivity of the different frequency of described measuring point present position.
Preferably, described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter is for having centre
The electric current transmitter of reason device；
Described central processing unit controls described electric current transmitter and generates single-frequency or 2nSequence pseudo is the most
Frequently current signal.
Preferably, described electromagnetism receives equipment is single-frequency or the multifrequency current potential with central processing unit
Difference measuring device；
Described central processing unit controls described single-frequency or the operating frequency of multifrequency potential difference measurement device
With described single-frequency or 2nThe power frequency that sequence pseudorandom multi-frequency electric current transmitter generates is corresponding.
Preferably, described transmission power supply is electromotor.
Preferably, also to include that range unit, described range unit are used for measuring described for described device
Measuring point position is to the distance at said two current electrode midpoint.
Preferably, described current electrode is horizontally disposed with, and described at least one electromagnetism receives equipment phase
Survey line residing for described current electrode is obliquely installed.
Second aspect, the present invention also provides for a kind of based on described whole district's measuring current source frequency domain
Electric field componentMethod, including:
Described transmission power supply is described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter conveying electricity
Energy；
Described single-frequency or 2nDescribed electric energy is converted into single-frequency by sequence pseudorandom multi-frequency electric current transmitter
Or 2nSequence pseudorandom multi-frequency current signal, and by described single-frequency or 2nSequence pseudorandom multi-frequency electricity
Stream signal is sent to said two current electrode；
Said two current electrode is by described single-frequency or 2nSequence pseudorandom multi-frequency current signal sends
To target area greatly；
Described at least one electromagnetism receive equipment receive the target area of the earth according to described single-frequency or
2nThe electric field component of one or more frequencies of sequence pseudorandom multi-frequency current signal feedbackSound
Induction signal；Described electric field componentResponse signal for being perpendicular to measuring point position and two power supplies
The electric field component response signal of electrode centers line.
Preferably, described method also includes:
Described at least one electromagnetism receives equipment by the electric field component of the one or more frequency
Response signal be sent to described processing means；
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, calculate the apparent resistivity of the different frequency of described measuring point present position.
Preferably, described processing means is according to the electric field component of the one or more frequency's
Response signal, calculates the apparent resistivity of the different frequency of described measuring point present position, including:
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, obtained the different frequency of described measuring point present position by alternative manner according to formula (1)
Apparent resistivity
In formula
Wherein, ρaFor apparent resistivity,For electric field componentResponse signal, ρ is preset resistance
Rate, Ω m；I is single-frequency or 2nThe single-frequency or 2 that sequence pseudorandom multi-frequency electric current transmitter sendsnSequence
The supply current of pseudorandom multi-frequency, A；DL is the straight length of two current electrodes, m；For
Measuring point and the line at two current electrode midpoints and the angle of two current electrode lines；R is note
Record o'clock is to the distance at two current electrode midpoints, m；I is imaginary unit；K is wave number；MN is
Electromagnetism receives the distance between two measurement electrodes of equipment, m.
As shown from the above technical solution, due to the fact that and only need to measure above-mentioned electric field component response letter
NumberTherefore can measure in the whole district including near region, transition region and far field, expand
Open up the scope of frequency-domain sounding, and owing to can measure in the whole district, so preventing energy to believe
The waste of breath, when large-area oil-gas exploration or geologic survey, when survey line is the longest, it is not necessary to
Mobile emission source, convenient relative to prior art.
Accompanying drawing explanation
Fig. 1 is that a kind of whole district measuring current source frequency domain electric field that one embodiment of the invention provides divides
AmountThe structural representation of device；
A kind of whole district measuring current source frequency domain electric field that Fig. 2 provides for one embodiment of the invention divides
AmountThe schematic flow sheet of method；
Fig. 3 is that horizontal current source of the present invention producesThe schematic diagram of direction electric field.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is made the most in detail
Describe.Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Fig. 1 is that a kind of whole district measuring current source frequency domain electric field that one embodiment of the invention provides divides
AmountThe structural representation of device.
As it is shown in figure 1, a kind of whole district measuring current source frequency domain that one embodiment of the invention provides
Electric field componentDevice, including: send power supply 1, single-frequency or 2nSequence pseudorandom multi-frequency electricity
Stream transmitter 2, electrodes of A, current electrode B, at least one electromagnetism receive equipment 3；
Described transmission power supply 1 connects described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter 2,
Described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter 2 connects described electrodes of A and confession
Electricity electrode B, described electrodes of A and described current electrode B receive equipment 3 with described electromagnetism
It is correspondingly arranged；
Described transmission power supply 1, is used for as described single-frequency or 2nSequence pseudorandom multi-frequency electric current sends
Machine 2 carries electric energy；
Described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter 2, for turning described electric energy
Change single-frequency or 2 intonSequence pseudorandom multi-frequency current signal, and by described single-frequency or 2nSequence pseudo with
Machine multifrequency current signal is sent to described electrodes of A and described current electrode B；
It is understood that described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter 2 can one
Secondary transmission comprises the electric current of one or more frequency.
Said two electrodes of A, B, for by described single-frequency or 2nSequence pseudorandom multi-frequency electricity
Stream signal sends to target area greatly；
It is understood that the distance root between described electrodes of A and described current electrode B
According to prospecting it needs to be determined that, generally about 1km, from target area can be measured simultaneously
Or the electric field component response signal of multiple frequency(above-mentioned electric field component response signal).
Described at least one electromagnetism receives equipment 3, for receive the target area of described the earth according to
Described single-frequency or 2nThe electric field of one or more frequencies of sequence pseudorandom multi-frequency current signal feedback
ComponentResponse signal；Described electric field componentResponse signal for be perpendicular to measuring point position and
The electric field component response signal of two current electrode lines of centres.
What deserves to be explained is, measuring point is in described electrodes of A and described current electrode B
Point position.
It is understood that the whole district of the present invention measuring current source frequency domain electric field componentDevice
In transmission power supply 1, single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter 2, described power supply electricity
Pole A and described current electrode B may be arranged at target area be separated by certain transmitting-receiving away from transmission position
Put.
Measuring point in Fig. 1 is measuring point.
Due to the fact that and only need to measure above-mentioned electric field component response signalTherefore can include
Near region, transition region and far field measure in the interior whole district, extend the scope of frequency-domain sounding,
And owing to can measure in the whole district, it is therefore prevented that the waste of energy information, survey at large-area oil gas
Look into or during geologic survey, when survey line is the longest, it is not necessary to mobile emission source, relative to prior art
Convenient.
CSAMT, owing to can only measure in far field, is therefore using Ka Niya formula to calculate apparent resistance
During rate, give up many high-order terms representing non-far field feature, introduced no small personal error,
Computational accuracy is low.As a kind of preferred embodiment, described device also includes: processing means；
Described processing means, at least one electromagnetism receives equipment described in connection；
Described electromagnetism receives equipment, is additionally operable to the electric field component of the one or more frequency
Response signal be sent to described processing means；
Described processing means, for the electric field component according to the one or more frequencySound
Induction signal, calculates the apparent resistivity of the different frequency of described measuring point present position.
In the present embodiment, owing to only needing measurement(above-mentioned electric field component response signal)
Calculating apparent resistivity, work efficiency is improved, and in the present embodiment accuracy of observation only with one
Individual observed quantity is relevant, it is to avoid uses two observed quantities and Carnot model formula to calculate and regards
The problem that the error that resistivity is brought is amplified (refers mainly to square meter of Carnot model formula
Calculate), therefore computational accuracy is higher.
The present invention can carry out underground Electrical distribution in the whole district (near region, transition region and far field)
Detection, can find out subsurface geological structure and distribution of mineral deposits, solve conventional gas and oil, shale gas and
The geological problems such as other engineering, the hydrology, environment.Observed efficiency is high, and precision is high, and construction is simple.
Existing important theory significance, has again important practical value.
As a kind of preferred embodiment, described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter
For having the electric current transmitter of central processing unit；
Described central processing unit controls described electric current transmitter and generates single-frequency or 2nSequence pseudo is the most
Frequently current signal.
That is, described single-frequency or 2nThe height of the frequency that sequence pseudorandom multi-frequency electric current transmitter 2 generates
Low and number can be previously set by central processing unit and carry out manual adjustment, the concrete electricity produced
Pressure, size of current and frequency all can need manual adjustment and selection according to prospecting.
As a kind of preferred embodiment, described electromagnetism receives equipment 3 for have central processing unit
Single-frequency or multifrequency potential difference measurement device；
Described central processing unit controls described single-frequency or the operating frequency of multifrequency potential difference measurement device
With described single-frequency or 2nThe power frequency that sequence pseudorandom multi-frequency electric current transmitter 2 generates is corresponding.
As, control described electromagnetism by central processing unit and receive the operating frequency of equipment 3 with described
Single-frequency or 2nThe operating frequency one_to_one corresponding of sequence pseudorandom multi-frequency electric current transmitter 2.
In reality, described transmission power supply 1 can be an electromotor.
As a kind of preferred embodiment, described device also includes range unit, described range unit
For measuring the described measuring point position distance to said two current electrode midpoint.
For the ease of realizing the measurement of the present invention, as a kind of preferred embodiment, said two supplies
Electricity electrode is horizontally disposed with, and described at least one electromagnetism receives equipment 3 relative to described current electrode
Residing survey line is obliquely installed.
A kind of whole district measuring current source frequency domain electric field that Fig. 2 provides for one embodiment of the invention divides
AmountThe schematic flow sheet of method.
As in figure 2 it is shown, a kind of whole district measuring current source frequency domain that one embodiment of the invention provides
Electric field componentMethod, including:
S21, described transmission power supply are described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter is defeated
Power transmission energy；
S22, described single-frequency or 2nDescribed electric energy is converted into by sequence pseudorandom multi-frequency electric current transmitter
Single-frequency or 2nSequence pseudorandom multi-frequency current signal, and by described single-frequency or 2nSequence pseudo is the most
Frequently current signal is sent to said two current electrode；
S23, said two current electrode are by described single-frequency or 2nSequence pseudorandom multi-frequency current signal
Send to target area greatly；
S24, described at least one electromagnetism receive equipment and receive the target area of the earth according to described list
Frequency or 2nThe electric field component of one or more frequencies of sequence pseudorandom multi-frequency current signal feedback
Response signal；Described electric field componentResponse signal for be perpendicular to measuring point position with two
The electric field component response signal of the current electrode line of centres.
It is understood that described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter can be once
Send the electric current comprising one or more frequency, can arrange that at least one electromagnetism receives equipment, with
Time measure from target area one or more frequencies electric field component response signal(above-mentioned
Electric field component response signal).
Due to the fact that and only need to measure above-mentioned electric field component response signalTherefore can include
Near region, transition region and far field measure in the interior whole district, extend the scope of frequency-domain sounding,
And owing to can measure in the whole district, it is therefore prevented that the waste of energy information, survey at large-area oil gas
Look into or during geologic survey, when survey line is the longest, it is not necessary to mobile emission source, relative to prior art
Convenient.
As a kind of preferred embodiment, described method also includes:
Described at least one electromagnetism receives equipment by the electric field component of the one or more frequency
Response signal be sent to described processing means；
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, calculate the apparent resistivity of the different frequency of described measuring point present position.
In the present embodiment, owing to only needing measurement(above-mentioned electric field component response signal)
Calculating apparent resistivity, work efficiency is improved, and in the present embodiment accuracy of observation only with one
Individual observed quantity is relevant, it is to avoid uses two observed quantities and Carnot model formula to calculate and regards
The problem that the error that resistivity is brought is amplified (refers mainly to square meter of Carnot model formula
Calculate), therefore computational accuracy is higher.
The present invention can carry out underground Electrical distribution in the whole district (near region, transition region and far field)
Detection, can find out subsurface geological structure and distribution of mineral deposits, solve conventional gas and oil, shale gas and
The geological problems such as other engineering, the hydrology, environment.Observed efficiency is high, and precision is high, and construction is simple.
Existing important theory significance, has again important practical value.
As a kind of preferred embodiment, described processing means is according to the one or more frequency
Electric field componentResponse signal, calculate described measuring point present position different frequency regard electricity
Resistance rate, including:
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, obtained the different frequency of described measuring point present position by alternative manner according to formula (1)
Apparent resistivity
In formula
Wherein, ρaFor apparent resistivity,For electric field componentResponse signal, ρ is preset resistance
Rate, Ω m；I is single-frequency or 2nThe single-frequency or 2 that sequence pseudorandom multi-frequency electric current transmitter sendsnSequence
The supply current of pseudorandom multi-frequency, A；DL is the straight length of two current electrodes, m；For
Measuring point and the line at two current electrode midpoints and the angle of two current electrode lines；R is note
Record o'clock is to the distance at two current electrode midpoints, m；I is imaginary unit；K is wave number；MN is
Electromagnetism receives the distance between two measurement electrodes of equipment, m..
Described measuring point present position uses iterative method Approach by inchmeal, can ask for target area and regard electricity
The optimum of resistance rate.
The derivation of above-mentioned formula (1) be given below:
As it is shown on figure 3, under quasistatic maximum conditions, HORIZONTAL ELECTRIC DIPOLE (described eelctric dipole
The electric dipole that son is constituted by said two current electrode) it is positioned at earth's surface, dipole moment is IdL (I
For humorous time-dependent current, dL is dipole length).Choose have the cylindrical-coordinate system of common origin O with
Rectangular coordinate system (Fig. 3), makes initial point be positioned at the side of the center of electric dipole, x-axis and electric dipole moment
To identical (Implication refer to the explanation of above-mentioned formula (1)-(5), it may be understood herein that for note
Record point and the angle with electric dipole moment direction, x-axis forward is i.e.), Electric field on earth surfacePoint
Amount expression formula is
In formula:
M is spatial frequency, R*With R it is
Spatial frequency characteristic function, N is the number of plies on stratum, ω is circular frequency, and μ is underground medium
Permeability, the implication of remaining parameter asks for an interview the explanation of above-mentioned formula (1)-(5).
As N=1, the electric field on available homogeneous half space surfaceThe expression formula of component:
Can directly obtain according to (14) formulaRegarding of wide area electromagnetic method (whole district's electromagnetic method) is electric
Resistance rate ρaFormula:
In formula
Expression formula formula contains the information (containing electricalresistivityρ in wave number k) of electricalresistivityρ,
I.e. formula (15) is the implicit function about electricalresistivityρ, i.e. can not ask for regarding electricity by directly calculating
The exact value of resistance rate.And the solving of the formula that develops into (15) of computer provides possibility, pass through
Computer programming, successive iteration, until obtainWith actual measurementMeet the precision that sets as
Only, the error of the apparent resistivity i.e. obtained is closely related with the precision of setting.
In the present embodiment, owing to only needing measurement(above-mentioned electric field component response signal)
Calculating apparent resistivity, work efficiency is improved, and in the present embodiment accuracy of observation only with one
Individual observed quantity is relevant, it is to avoid uses two observed quantities and Carnot model formula to calculate and regards
The problem that the error that resistivity is brought is amplified (refers mainly to square meter of Carnot model formula
Calculate), therefore computational accuracy is higher.
It should be noted that, in all parts of assembly of the invention, to be realized according to it
Function and parts therein have been carried out logical partitioning, but, the present invention is not only restricted to this, can
As required all parts repartitioned or to combine, for example, it is possible to by some portions
Part is combined as single parts, or some parts can be further broken into more subassembly.
The all parts embodiment of the present invention can realize with hardware, or with at one or many
The software module run in individual processing means realizes, or realizes with combinations thereof.This area
It will be appreciated by the skilled person that can use in practice at micro treatmenting device or digital signal
Reason device (DSP) realizes the some or all parts in system according to embodiments of the present invention
Some or all functions.The present invention is also implemented as performing side as described herein
Part or all equipment of method or (such as, computer program and the calculating of device program
Machine program product).The program of such present invention of realization can be stored in computer-readable medium
On, or can be to have the form of one or more signal.Such signal can be from because of spy
Download on net website and obtain, or provide on carrier signal, or carry with any other form
Supply.
The present invention will be described rather than carries out the present invention to it should be noted above-described embodiment
Limit, and those skilled in the art without departing from the scope of the appended claims may be used
Design alternative embodiment.In the claims, any reference between bracket should not will be located in
Symbol construction becomes limitations on claims.Word " comprise " do not exclude the presence of be not listed in right want
Element in asking or step.Word "a" or "an" before being positioned at element does not excludes the presence of multiple
Such element.The present invention can by means of include some different elements hardware and by
Realize in properly programmed computer.If in the unit claim listing equipment for drying,
Several in these devices can be specifically to be embodied by same hardware branch.Word first,
Second and third use do not indicate that any order.Can be title by these word explanations.
Embodiment of above is only suitable to illustrate the present invention, and not limitation of the present invention is relevant
The those of ordinary skill of technical field, without departing from the spirit and scope of the present invention,
Can also make a variety of changes and modification, the technical scheme of the most all equivalents falls within the present invention
Category, the scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. whole district's measuring current source frequency domain electric field componentDevice, it is characterised in that
Including: send power supply, single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, two power supply electricity
Pole, at least one electromagnetism receive equipment；
Described transmission power supply connects described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, institute
State single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter connects said two current electrode, described
Two current electrodes receive equipment with described electromagnetism and are correspondingly arranged；
Described transmission power supply, is used for as described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter
Conveying electric energy；
Described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter, for by described transmission power supply
The electric energy produced is converted into single-frequency or 2nSequence pseudorandom multi-frequency current signal, and by described single-frequency
Or 2nSequence pseudorandom multi-frequency current signal is sent to said two current electrode；
Said two current electrode, for by described single-frequency or 2nSequence pseudorandom multi-frequency electric current is believed
Number send to target area greatly；
Described at least one electromagnetism receives equipment, for receive the target area of described the earth according to
Described single-frequency or 2nThe electric field of one or more frequencies of sequence pseudorandom multi-frequency current signal feedback
ComponentResponse signal；Described electric field componentResponse signal for be perpendicular to measuring point position and
The electric field component response signal of two current electrode lines of centres.
Device the most according to claim 1, it is characterised in that described device also includes:
Processing means；
Described processing means, at least one electromagnetism receives equipment described in connection；
Described at least one electromagnetism receives equipment, is additionally operable to the electricity of the one or more frequency
Field componentResponse signal be sent to described processing means；
Described processing means, for the electric field component according to the one or more frequencySound
Induction signal, calculates the apparent resistivity of the different frequency of described measuring point present position.
Device the most according to claim 1, it is characterised in that described single-frequency or 2nSequence
Pseudorandom multi-frequency electric current transmitter is the electric current transmitter with central processing unit；
Described central processing unit controls described electric current transmitter and generates single-frequency or 2nSequence pseudo is the most
Frequently current signal.
Device the most according to claim 1, it is characterised in that described electromagnetism receives equipment
For having single-frequency or the multifrequency potential difference measurement device of central processing unit；
Described central processing unit controls described single-frequency or the operating frequency of multifrequency potential difference measurement device
With described single-frequency or 2nThe power frequency that sequence pseudorandom multi-frequency electric current transmitter generates is corresponding.
Device the most according to claim 1, it is characterised in that described transmission power supply can be
Electromotor.
Device the most according to claim 1, it is characterised in that described device also includes surveying
Away from device, described range unit is used for measuring described measuring point position to said two current electrode
The distance at midpoint.
7. according to the device according to any one of claim 1-6, it is characterised in that described confession
Electricity electrode is horizontally disposed with, and described at least one electromagnetism receives equipment relative to described current electrode institute
The survey line at place is obliquely installed.
8. one kind based on the whole district's measuring current source frequency domain according to any one of claim 1-7
Electric field componentMethod, it is characterised in that including:
Described transmission power supply is described single-frequency or 2nSequence pseudorandom multi-frequency electric current transmitter conveying electricity
Energy；
Described single-frequency or 2nDescribed electric energy is converted into single-frequency by sequence pseudorandom multi-frequency electric current transmitter
Or 2nSequence pseudorandom multi-frequency current signal, and by described single-frequency or 2nSequence pseudorandom multi-frequency electricity
Stream signal is sent to said two current electrode；
Said two current electrode is by described single-frequency or 2nSequence pseudorandom multi-frequency current signal sends
To target area greatly；
Described at least one electromagnetism receive equipment receive the target area of the earth according to described single-frequency or
2nThe electric field component of one or more frequencies of sequence pseudorandom multi-frequency current signal feedbackSound
Induction signal；Described electric field componentResponse signal for being perpendicular to measuring point position and two power supplies
The electric field component response signal of electrode centers line.
Method the most according to claim 8, it is characterised in that described method also includes:
Described at least one electromagnetism receives equipment by the electric field component of the one or more frequency
Response signal be sent to described processing means；
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, calculate the apparent resistivity of the different frequency of described measuring point present position.
Method the most according to claim 9, it is characterised in that described processing means root
Electric field component according to the one or more frequencyResponse signal, calculate described measuring point institute
The apparent resistivity of the different frequency of position, place, including:
Described processing means is according to the electric field component of the one or more frequencyResponse letter
Number, obtained the different frequency of described measuring point present position by alternative manner according to formula (1)
Apparent resistivity
In formula
Wherein, ρaFor apparent resistivity,For electric field componentResponse signal, ρ is preset resistance
Rate, Ω m；I is single-frequency or 2nThe single-frequency or 2 that sequence pseudorandom multi-frequency electric current transmitter sendsnSequence
The supply current of pseudorandom multi-frequency, A；DL is the straight length of two current electrodes, m；For
Measuring point and the line at two current electrode midpoints and the angle of two current electrode lines；R is note
Record o'clock is to the distance at two current electrode midpoints, m；I is imaginary unit；K is wave number；MN is
Electromagnetism receives the distance between two measurement electrodes of equipment, m.
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