CN108267787A - Electromagnetism separation AMT detection methods, device and equipment - Google Patents
Electromagnetism separation AMT detection methods, device and equipment Download PDFInfo
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- CN108267787A CN108267787A CN201810081952.9A CN201810081952A CN108267787A CN 108267787 A CN108267787 A CN 108267787A CN 201810081952 A CN201810081952 A CN 201810081952A CN 108267787 A CN108267787 A CN 108267787A
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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
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
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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
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The present invention provides a kind of electromagnetism separation AMT detection methods, device and equipment, are related to underwater technical field of geological exploration, and this method is applied to AMT, including：The electric field signal in target acquisition waters is acquired by electric field signal harvester；The electric field signal harvester is laid in the waterborne of target acquisition waters；The magnetic field signal in above-mentioned target acquisition waters is acquired by magnetic field signal harvester；The magnetic field signal harvester is laid in the land on above-mentioned target acquisition waters bank；Above-mentioned electric field signal and magnetic field signal are transferred to terminal device and obtain the resistivity inversion result in above-mentioned target acquisition waters to carry out inversion procedure.The embodiment of the present invention is designed to provide a kind of electromagnetism separation AMT detection methods, device and equipment, can provide the observation of suitable waters, underwater equipment is easier, water-bed stronger Detection Techniques of conformation identification ability, solves the problems, such as the effective Detection Techniques of underground space shortage of the shallow water areas such as rivers and lakes.
Description
Technical field
The present invention relates to underwater technical field of geological exploration, more particularly, to a kind of electromagnetism separation AMT detection methods, device
And equipment.
Background technology
Chinese large-sized urban development space is limited, and the underground space is the important directions of China's future development, builds its detection
Technical system has strategic importance to national Important Project and local construction.Because rivers and lakes waters working environment limits, many detections
Technology still has problem in waters.
At present, the technical method applied to waters detection has ocean MT, ocean CSAMT and shallow water area transient electromagnetic method.Its
In, MT (Magnetotelluric sounding methods) magnetotelluric sounding method, is Soviet Union scholar Tikhonov
(1950) and the utilization natural alternating electromagnetic field research earth that puts forward French scholar Cagniard (1953) beginning of the fifties is electrical
A kind of geophysical exploration method of structure；CSAMT(Controlled-Source Audio-frequency
Magnetotelluric methods) controlled-source audiomagnetotellurics method is the conductivity difference observation one using different rocks
A kind of electromagnetic exploration method of secondary field potential and change of magnetic field strength；Transient electromagnetic method is to utilize earth-free loop line or ground wire
Source is to underground transmitting pulsatile once magnetic field, and in pulsatile once magnetic field, tempus intercalare utilizes coil or grounding electrode observation underground medium
In caused secondary inductive loop field, so as to detect a kind of method of resistivity of media.
But above-mentioned three kinds of methods there is problems：Shallow water area transient electromagnetic method is in the identification energy to bottom construction
Not as good as MT and CSAMT in power, and ocean MT and CSAMT Detection Techniques due to its underwater equipment excessively it is huge can not be applicable in water body compared with
Small rivers and lakes waters.
Invention content
In view of this, the purpose of the present invention is to provide a kind of electromagnetism separation AMT detection methods, device and equipment, to carry
For be suitble to waters observation, underwater equipment is easier, water-bed stronger Detection Techniques of conformation identification ability, it is shallow to solve rivers and lakes etc.
The underground space in waters lacks the problem of effective Detection Techniques.
In a first aspect, an embodiment of the present invention provides a kind of electromagnetism to detach AMT detection methods, applied to AMT, including：It is logical
Cross the electric field signal in electric field signal harvester acquisition target acquisition waters；The electric field signal harvester is laid in above-mentioned target
Detect the waterborne of waters；The electric field signal harvester includes：Do not polarize electricity in electricity acquisition host, towed acquisition cable and water
Pole；The magnetic field signal in the target acquisition waters is acquired by magnetic field signal harvester；The magnetic field signal harvester is laid in
The land on above-mentioned target acquisition waters bank；The magnetic field signal harvester includes：Magnetic acquisition host, Magnetic Sensor and magnetic pass
Conducting wire；The electric field signal and the magnetic field signal are transferred to terminal device and obtain above-mentioned target acquisition waters to carry out inversion procedure
Resistivity inversion result.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, it should
Electromagnetism separation AMT detection methods further include：Satellite clock signal is received by satellite earth antenna；The satellite clock signal is used for
Synchronize above-mentioned electric field signal and above-mentioned magnetic field signal.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein,
Before the step of acquiring the electric field signal in target acquisition waters above by electric field signal harvester, further include：Pass through production
Preceding experiment obtains acquisition parameter；The preproduction-type test includes：Measuring electrode is away from experiment, the experiment of observation duration and surveys area's electromagnetic interference
Experiment；The acquisition parameter includes：Measuring electrode away from, observation duration, observation period.
Second of possible embodiment with reference to first aspect, an embodiment of the present invention provides the third of first aspect
Possible embodiment, wherein, before the step of obtaining acquisition parameter above by preproduction-type test, further include：Passability
Energy testing experiment acquires the performance data of above-mentioned electric field signal harvester and above-mentioned magnetic field signal harvester；The performance data
For judging the behavior pattern of the electric field signal harvester and the magnetic field signal harvester；The performance test includes：
Instrumental calibration experiment, the experiment of instrument Consistency test, parallel testing and unpolarizable electrode testing experiment.
With reference to first aspect, an embodiment of the present invention provides the 4th kind of possible embodiment of first aspect, wherein, it adopts
The acquisition of above-mentioned electric field signal and above-mentioned magnetic field signal is carried out with scalar fashion.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein, it should
Method further includes：It is analyzed according to above-mentioned resistivity inversion result, obtains the underwater geological conditions construction feelings in the target acquisition waters
Condition.
Second aspect, the embodiment of the present invention additionally provide a kind of electromagnetism separation AMT detection devices, applied to AMT, including：
Electric field signal acquisition module, for passing through the electric field signal in electric field signal harvester acquisition target acquisition waters；The electric field is believed
Number harvester is laid in the waterborne of target acquisition waters；The electric field signal harvester includes：Electricity acquisition host, towed are adopted
Collect unpolarizable electrode in cable and water；Magnetic field signal acquisition module acquires above-mentioned target for passing through magnetic field signal harvester
Detect the magnetic field signal in waters；The magnetic field signal acquires the land for being laid in the target acquisition waters bank；The magnetic field signal
Harvester includes：Magnetic acquisition host, Magnetic Sensor and magnetic call wire；Transmission module, for by above-mentioned electric field signal and above-mentioned
Magnetic field signal is transferred to terminal device and obtains the resistivity inversion result in the target acquisition waters to carry out inversion procedure.
With reference to second aspect, an embodiment of the present invention provides the first possible embodiment of second aspect, wherein, it should
Electromagnetism separation AMT detection devices further include：Satellite clock module receives satellite clock signal for passing through satellite earth antenna；
The satellite clock signal is used to synchronize above-mentioned electric field signal and above-mentioned magnetic field signal.
With reference to second aspect, an embodiment of the present invention provides second of possible embodiment of second aspect, wherein, it should
Electromagnetism separation AMT detection devices further include：Acquisition parameter module obtains acquisition parameter for passing through preproduction-type test；The production
Preceding experiment includes：Measuring electrode is away from experiment, the experiment of observation duration and surveys area's test of electromagnetic disturbance；The acquisition parameter includes：It measures
Electrode spacing, observation duration, observation period.
The third aspect, the embodiment of the present invention additionally provide a kind of electromagnetism separation AMT detecting devices, including：Electric field signal is adopted
Acquisition means and magnetic field signal harvester；The electric field signal harvester includes：Electricity acquisition host, towed acquisition cable and water
Middle unpolarizable electrode；The electricity acquires host and is connected by above-mentioned towed acquisition cable with unpolarizable electrode in above-mentioned water；The magnetic
Field signal harvester includes：Magnetic acquisition host, Magnetic Sensor and magnetic call wire；Magnetic acquisition host passes through above-mentioned magnetic call wire
It is connected with above-mentioned Magnetic Sensor；The electric field signal harvester is laid in the waterborne of target acquisition waters, for acquiring the target
Detect the electric field signal in waters；The magnetic field signal harvester is laid in the land on the target acquisition waters bank, for adopting
Collect the magnetic field signal in the target acquisition waters.
The embodiment of the present invention brings following advantageous effect：
Electromagnetism provided in an embodiment of the present invention detaches AMT detection methods, device and equipment, electromagnetism separation AMT detection sides
Method is applied to AMT, and the electric field signal in target acquisition waters is acquired by electric field signal harvester；The electric field signal harvester
It is laid in the waterborne of above-mentioned target acquisition waters；The electric field signal harvester includes：Electricity acquisition host, towed acquisition cable
With unpolarizable electrode in water；The magnetic field signal in above-mentioned target acquisition waters is acquired by magnetic field signal harvester；Believe in the magnetic field
Number harvester is laid in the land on the target acquisition waters bank；The magnetic field signal harvester includes：Magnetic acquisition host,
Magnetic Sensor and magnetic call wire；Above-mentioned electric field signal and above-mentioned magnetic field signal are transferred to terminal device to obtain to carry out inversion procedure
To the resistivity inversion result in the target acquisition waters；Can provide the observation of suitable waters, underwater equipment it is easier, water-bed
The stronger Detection Techniques of conformation identification ability, the underground space for solving the shallow water areas such as rivers and lakes lack asking for effective Detection Techniques
Topic.
Other feature and advantage of the disclosure will illustrate in the following description, alternatively, Partial Feature and advantage can be with
Deduce from specification or unambiguously determine or by implement the disclosure above-mentioned technology it can be learnt that.
For the above-mentioned purpose of the disclosure, feature and advantage is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 detaches AMT detection method application scenarios schematic diagrams for a kind of electromagnetism provided in an embodiment of the present invention；
Fig. 2 detaches AMT detection method flow diagrams for a kind of electromagnetism provided in an embodiment of the present invention；
Fig. 3 detaches AMT detection method electrode connection mode schematic diagrames for a kind of electromagnetism provided in an embodiment of the present invention；
Fig. 4 detaches AMT detection method irrigation canals and ditches banks and irrigation canals and ditches observation waterborne for a kind of electromagnetism provided in an embodiment of the present invention
Comparative result figure；
Fig. 5 detaches the sight waterborne of AMT detection method interference-free coverage area difference durations for a kind of electromagnetism provided in an embodiment of the present invention
Apparent resistivity and phase-contrast figure are tested in test；
Fig. 6 detaches the observation waterborne of AMT detection method interference range different interpolar distances for a kind of electromagnetism provided in an embodiment of the present invention
Test apparent resistivity and phase-contrast figure；
Fig. 7 is the observation experiment waterborne that a kind of electromagnetism provided in an embodiment of the present invention detaches AMT detection method different periods
Apparent resistivity and phase-contrast figure；
Fig. 8 is the inversion result schematic diagram that a kind of electromagnetism provided in an embodiment of the present invention detaches AMT detection methods；
Fig. 9 is the structure diagram that a kind of electromagnetism provided in an embodiment of the present invention detaches AMT detection devices.
Icon：
10- electricity acquires host；11- toweds acquire cable；Unpolarizable electrode in 12- water；13- magnetic acquires host；14- magnetic
Sensor；15- magnetic call wires；91- electric field signal acquisition modules；92- magnetic field signal acquisition modules；93- satellite clock modules；
94- acquisition parameter modules；95- transmission modules.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
At present, ocean MT, ocean CSAMT and shallow water area transient electromagnetic method are all applied in the exploration of waters, wherein,
The above two are mainly used in seafari, because its equipment is relatively bulky, are not suitable for the waters such as the smaller rivers and lakes of water body；And the latter
The bottom construction recognition capability on then not as good as the above two, on the whole for, still lack in the underground space of the shallow water areas such as rivers and lakes
Effective Detection Techniques.Based on this, a kind of electromagnetism provided in an embodiment of the present invention detaches AMT detection methods, device and equipment, can
To provide, that waters is suitble to observe, underwater equipment is easier, the water-bed stronger Detection Techniques of conformation identification ability.
For ease of understanding the present embodiment, a kind of electromagnetism separation AMT disclosed in the embodiment of the present invention is visited first
Survey method describes in detail.
Embodiment 1
AMT (Audio-frequency Magnetotelluric methods) audio-frequency magnetotelluric magnetic method, is that one kind is based on
Electromagnetic induction principle in the mutually orthogonal audiorange of ground survey (0.1Hz-50kHz) electric field and magnetic-field component, calculates and regards electricity
Resistance rate and impedance phase, a kind of frequency-domain sounding method in passive source of Study of The Underground resistivity structure.Under normal conditions, AMT
The electric field signal and magnetic field signal in target acquisition region are acquired, and passes through the two parameters and handles to obtain target acquisition region
Subsurface resistivity.
In order to which AMT Detection Techniques are applied on waters, an embodiment of the present invention provides a kind of electric field signals and magnetic field to believe
Number AMT detection methods separately acquired.As shown in Figure 1, detach AMT detection methods for a kind of electromagnetism provided in an embodiment of the present invention
Application scenarios schematic diagram, in the embodiment shown in Fig. 1, electric field signal harvester is laid in river, and magnetic field signal is adopted
Acquisition means are laid in the land on river side.As seen from Figure 1, which includes：Electricity acquisition host 10 pulls
Formula acquires unpolarizable electrode 12 in cable 11 and water, and wherein host is placed on tractor tug, is connected on towed acquisition cable 11
There is a unpolarizable electrode 12 in several water, unpolarizable electrode 12 is equally spaced in each water, and towed acquisition cable 11 is fixed on
Stern, and be electrically connected with electricity acquisition host 10, it is in alignment on the whole.The magnetic field signal harvester includes：Magnetic acquisition master
Machine 13, Magnetic Sensor 14 and magnetic sensing line.Wherein, there are two Magnetic Sensors 14 in this embodiment, sensed respectively by magnetic
Line is connected with magnetic acquisition host 13, is mutually perpendicular to put in the two 14 planes of Magnetic Sensor.
Specific implementation for electromagnetism provided in an embodiment of the present invention separation AMT detection methods, as shown in Fig. 2, for this hair
A kind of electromagnetism separation AMT detection method flow diagrams that bright embodiment provides, the specific steps are：
Step S201：The electric field signal in target acquisition waters is acquired by electric field signal harvester；The electric field signal is adopted
Acquisition means are laid in the waterborne of above-mentioned target acquisition waters；The electric field signal harvester includes：Electricity acquisition host 10, towed
Acquire unpolarizable electrode 12 in cable 11 and water.
Wherein, electricity acquisition host 10 acquires cable 11 by above-mentioned towed and is connected with unpolarizable electrode in water 12.Electricity is adopted
Collect the electric signal that host 10 controls the measurement target acquisition of unpolarizable electrode 12 waters in water, and will by towed acquisition cable 11
Electric field signal is passed back and is preserved.Electricity acquisition host 10 is non-watertight, need to be placed on floating carrier, avoid the contact with water, the drift
Float carrier can be a canoe.Towed acquisition cable 11 has stronger intensity, can sustain a fairly large number of water
The weight of middle unpolarizable electrode 12, and unpolarizable electrode 12 in water above can be drawn when moving and moved.
In wherein a kind of embodiment, the model of electricity acquisition host 10 can be MTU-5A or MTU-2E, in addition, electromagnetism
The acquisition system of separation AMT detection methods further includes：Satellite earth antenna, external connection battery and buoy.External connection battery is used for instrument
Device host supplying power, operating voltage 12V, the external connection battery can be lithium battery or accumulator.Satellite earth antenna is used to give
Instrument host provides satellite clock signal.Wherein, unpolarizable electrode 12 is separately fixed at towed acquisition electricity in buoy and water
On cable 11, the buoy for providing buoyancy, make in towed acquisition cable 11 and water unpolarizable electrode 12 hover over the water surface with
Under, but do not sink under water.
Step S202：The magnetic field signal in above-mentioned target acquisition waters is acquired by magnetic field signal harvester；Believe in the magnetic field
Number harvester is laid in the land on above-mentioned target acquisition waters bank；The magnetic field signal harvester includes：Magnetic acquisition master
Machine 13, Magnetic Sensor 14 and magnetic call wire 15.
Magnetic acquisition host 13 is connected, and Magnetic Sensor 14 is controlled to acquire target by magnetic call wire 15 with Magnetic Sensor 14
The magnetic field signal in waters is detected, passed the magnetic field signal back magnetic acquisition host 13 by magnetic call wire 15 and is preserved.It is a kind of wherein
In embodiment, the model of magnetic acquisition host 13 can be MTU-5A.Wherein, entire magnetic field signal harvester is all laid in
Land, and close proximity to target acquisition waters.
Step S203：Above-mentioned electric field signal and above-mentioned magnetic field signal are transferred to terminal device to obtain to carry out inversion procedure
The resistivity inversion result in the target acquisition waters.
In wherein one or more embodiments, the coffret on host 10 can be acquired by electricity by the electricity of acquisition
The export of field signal data comes, and the export of magnetic field signal data is also similarly.For the acquisition host of certain model, set in host
There are pluggable TF RAM cards, TF card can be taken out and the data in TF RAM cards are copied, and transfer data to by card reader
Terminal device, such as laptop.Inversion procedure is carried out using Correlation method for data processing software on the terminal device, at the data
It can be mating software AMT-PRO or MT-SOFT2D of Canadian phoenix company etc. to manage software, after software inversion procedure
To resistivity inversion result.
In practical operation, before formal collecting work is carried out, first have to acquire above-mentioned electric field by performance test
The performance data of signal pickup assembly and above-mentioned magnetic field signal harvester.The performance data fills for judging that electric field signal acquires
Put the behavior pattern with magnetic field signal harvester.Wherein, above-mentioned performance test includes：Instrumental calibration experiment, instrument one
The experiment of cause property, parallel testing experiment and unpolarizable electrode testing experiment.
According to the natural field audio-frequency magnetotelluric magnetic methods of People's Republic of China (PRC) geological and mineral professional standard DZ/T 0305-2017
Technical regulation, first, before going into operation in work area and instrument break down after be required for demarcating instrument with inspection apparatus whether
Normally；Magnetic Sensor 14 should then be calibrated before going into operation.Secondly, also reply participates in more instruments of production before measurement goes into operation
Consistency contrast test is carried out, and the mean square error of more than 80% frequency point measurement result is required to be not more than 5%.Then, field
Measuring instrument should should carry out parallel testing before and after surveying area and going into operation, and the frequency field result that adjacent electricity road or inter-track are tested is opposite accidentally
Difference requirement is no more than 2%.Finally, unpolarizable electrode in water 12 is positioned in water and detected, difference in Electrode Potential between any two will
It asks no more than 2mV.
It is completed in above-mentioned performance test and after qualification, also acquisition parameter is obtained by preproduction-type test.Wherein,
Above-mentioned preproduction-type test includes：Measuring electrode is away from experiment, the experiment of observation duration and surveys area's test of electromagnetic disturbance, passes through above-mentioned production
Preceding experiment obtains the best-of-breed technology scheme in work area, including following acquisition parameter：Measuring electrode away from, observation duration and observation when
Section.First, according to design sheets and work purpose requirement, multiple and different electrode spacings is generally selected, observed result is compared, determines electrode
Away from range；Secondly, observation time is determined, and carry out observation interval experiment according to investigation depth and interference level, with reference to regarding
Resistivity and the round and smooth continuous situation of phase curve, choose rational observation interval；Then, area's electromagnetic interference is surveyed by actual measurement
Signal judges the features such as type, intensity, frequency distribution range and the interference period of electromagnetic interference source, to avoid, reducing or suppress
The influence providing method foundation of electromagnetic interference field, determines best observation period.
After completing above-mentioned preproduction-type test and obtaining the best acquisition parameter in target acquisition region, survey line measuring point is carried out
The laying of arrangement and observation device.Wherein, survey line and measuring point require to lay according to design sheets, and measuring point laying should be avoided hindering in water
Hinder object, when encountering barrier, can along survey line half point away from the range of or cross line direction half line-spacing side
By parallel move to suitable place in position.When really obstacle can not be avoided, the measuring point can be cast out.Towed acquires cable 11
It is measured along pre-designed survey line, pull-type acquisition cable at interval of certain distance is fixed, is allowed to protect
It holds along line direction, and is fixed the position angle with forest compass.In wherein a kind of embodiment, as shown in figure 3, real for the present invention
A kind of electromagnetism separation AMT detection method electrode connection mode schematic diagrames of example offer, as seen from Figure 3, unpolarizable electrode in water are provided
12 can be used staggered form connection or sequential connection mode.The laying principle of Magnetic Sensor 14 be choose it is nearest and dry away from measuring point
Smaller bank is disturbed, the azimuth of cable 11 is acquired according to towed, Magnetic Sensor 14 is buried using forest compass and level meter,
Including the Magnetic Sensor 14Hx and the Magnetic Sensor 14Hy of cross line direction along line direction；Make towed acquisition cable 11 with
Its corresponding Magnetic Sensor 14 is intersecting vertical, also needs to intersect vertically between two horizontal Magnetic Sensors 14, respective azimuth deviation is not
More than 1 °.Two horizontal Magnetic Sensors 14 bury spacing not less than 5m, and magnetic sensing line cannot be hanging, can not be placed in parallel, often
Soil or stone need to be used to be compacted every 3m-5m, prevent from shaking, avoid generating electromagnetic interference because wind shakes conducting wire.
After observation device laying is ready, according to determining acquisition parameter, with scalar fashion acquisition target acquisition region
Electric field signal data and magnetic field signal data.First, it checks whether acquisition cable, Magnetic Sensor 14 and signal wire laying reach to want
It asks；Securely whether inspection apparatus connect correct, with acquisition cable, and whether each electrode ground connection of acquisition cable good, supply voltage with
Whether instrument is normal, and whether Magnetic Sensor 14 is flapped toward correct；It is respectively checked item by item to content by class's report.Secondly, start in instrument
Afterwards every test is carried out by instrumentation specification.Wherein, it is desirable that each measuring point, which should reach completion geological tasks, to be observed
Lowest observed frequency；Each frequency point should have enough stacking folds, particularly the low-frequency range quality of data, not reach requirement such as,
Observation time should be extended, increase stacking fold, to ensure the quality of data.In addition, reply influences the prominent of measurement in observation process
Heat condition is recorded, and so as to data processing and mends survey.Also field inspection work on the spot record is done.Finally, after knocking off daily
The data of acquisition are preserved and backed up, carry out data processing and quality evaluation in time, it should be another day to the measuring point for not meeting quality requirement
It resurveys.
The electromagnetism separation AMT detection methods that embodiment provides in order to further illustrate the present invention, below with a practical example
Son is explained.First, on Tianjin Clintonia udensis periphery, the AMT on the waterborne and bank that irrigation canals and ditches implement small irrigation canals and ditches is observed to having a competition
It tests.Experiment is using same pole away from (60m), same magnetic field point position, identical observation duration (45min).As shown in figure 4, for the present invention
A kind of electromagnetism separation AMT detection method irrigation canals and ditches banks and irrigation canals and ditches observed result comparison diagram waterborne that embodiment provides, can by Fig. 4
See, the apparent resistivity and phase of observation waterborne and bank observation, in addition to natural field frequencies range blind area (near 1kHz-4kHz) is by noise
It influences outside different from, two tracing patterns are completely the same, and it is feasible to illustrate that AMT is observed on the water.
Secondly, it most preferably observes pole span for determining trial zone and most preferably observes duration, respectively in the different ditches in 7, Clintonia udensis periphery
Canal point has carried out the contrast test of different interpolar distance waterborne and different observation durations, is determined using electromagnetism separation AMT detection methods
Point observation.The electrode spacing of contrast test is respectively 20m, 60m and 100m, and observation duration is respectively 10min, 30min and 60min.
Comparative test result is shown, in the AMT apparent resistivities of no electromagnetic interference point observation waterborne and phase curve (as shown in Figure 5), nothing
By from small pole span to big pole span, big duration is grown to from hour, curve is smooth and form is consistent, illustrates to work in interference-free coverage area,
Job requirement can be met using small pole span and small duration；And in the AMT apparent resistivities for having the observation waterborne of certain electromagnetic interference point
And phase curve (shown in Fig. 6), various pole spans and observation duration, curve are only affected after 8Hz, most of curve
Section is smooth consistent, illustrates that small pole span and small duration can also meet job requirements of the 500m with shallow penetration.
In order to understand the noise situation of trial zone, the noise observation experiment of whole day is implemented.As shown in fig. 7, for the present invention
A kind of electromagnetism separation AMT detection method interference range different interpolar distances observation experiment apparent resistivity waterborne and phase pair that embodiment provides
Than figure, result of the test shows that signal-to-noise ratio in afternoon will be significantly better than the morning.Frequency blind area or 1Hz near either 1kHz-4kHz
Neighbouring blind area section, the apparent resistivity and phase curve of observation waterborne in afternoon are better than morning observation curve, illustrate in this area
Carry out AMT waterborne and measure and should be observed preferably afternoon.
In wherein a kind of embodiment, by taking the AMT section detection tests of Baiyang Lake waters as an example, experimental field positioned at Anxin County
Hold villages and small towns Nan Dian areas, Shu Nan Baiyang Lake area.Static measurement is carried out using electromagnetism separation AMT detection methods, electricity road waterborne chain is 20m
The intersection Connection Mode of spacing, 60m pole spans often arranges 3 electric road ocean weather station observations, observation duration 30 minutes.Profile survey amounts to 24
It is a, total length about 1150m.Test data obtains test profile after data processing is calculated with one-dimensional, two dimensional inversion
Inverting resistivity section.As shown in figure 8, the inverting knot of AMT detection methods is detached for a kind of electromagnetism provided in an embodiment of the present invention
Fruit schematic diagram analyzes inversion result, 4 layers of medium-low electricity of-height-during inverting resistivity section is shown from top to bottom according to Fig. 8
Resistance rate off-note.Peripherally matter research data transitivity feature, initial guess are thought according to North China Oilfield, from top to bottom
In-high-medium-low stratiform electrical structure, be the region layer shape earth formation reflection, corresponded to four stratum, first layer respectively：
Water, mud, the rich water sand bed of shallow lake area from top to bottom；The second layer：Argillic horizon；Third layer：Water-bearing sand；4th layer：Containing brine
Layer.
Electromagnetism provided in an embodiment of the present invention detaches AMT detection methods, and applied to AMT, this method is adopted by electric field signal
The electric field signal in acquisition means acquisition target acquisition waters；The electric field signal harvester is laid in the water in above-mentioned target acquisition waters
On；The electric field signal harvester includes：Unpolarizable electrode in electricity acquisition host, towed acquisition cable and water；Pass through magnetic field
Signal pickup assembly acquires the magnetic field signal in above-mentioned target acquisition waters；The magnetic field signal harvester is laid in the target acquisition
The land on waters bank；The magnetic field signal harvester includes：Magnetic acquisition host, Magnetic Sensor and magnetic call wire；It will be above-mentioned
Electric field signal and above-mentioned magnetic field signal are transferred to terminal device and obtain the resistivity in the target acquisition waters to carry out inversion procedure
Inversion result；Can provide the observation of suitable waters, underwater equipment is easier, the water-bed stronger detection skill of conformation identification ability
Art solves the problems, such as that the underground space of the shallow water areas such as rivers and lakes lacks effective Detection Techniques.
Embodiment 2
The embodiment of the present invention additionally provides a kind of electromagnetism separation AMT detection devices, applied to AMT, as shown in figure 9, for this
The structure diagram of a kind of electromagnetism separation AMT detection devices that inventive embodiments provide, as seen from Figure 9, which includes：Electric field
Signal acquisition module 91, for passing through the electric field signal in electric field signal harvester acquisition target acquisition waters；The electric field signal
Harvester is laid in the waterborne of target acquisition waters；The electric field signal harvester includes：Electricity acquisition host 10, towed are adopted
Collect unpolarizable electrode 12 in cable 11 and water；Magnetic field signal acquisition module 92, for passing through the acquisition of magnetic field signal harvester
State the magnetic field signal in target acquisition waters；The magnetic field signal acquires the land for being laid in the target acquisition waters bank；The magnetic
Field signal harvester includes：Magnetic acquisition host 13, Magnetic Sensor 14 and magnetic call wire 15；Transmission module 95, for will be above-mentioned
Electric field signal and above-mentioned magnetic field signal are transferred to terminal device and obtain the resistivity in the target acquisition waters to carry out inversion procedure
Inversion result.Above-mentioned transmission module 95 is connected respectively with electric field signal acquisition module 91 and magnetic field signal acquisition module 92.
Wherein, electromagnetism separation AMT detection devices further include：Satellite clock module 93, for passing through satellite earth antenna
Receive satellite clock signal；The satellite clock signal is used to synchronize above-mentioned electric field signal and above-mentioned magnetic field signal.The satellite clock
Module 93 is connected respectively with electric field signal acquisition module 91 and magnetic field signal acquisition module 92.
In addition, electromagnetism separation AMT detection devices further include：Acquisition parameter module 94 obtains for passing through preproduction-type test
Take acquisition parameter；The preproduction-type test includes：Measuring electrode is away from experiment, the experiment of observation duration and surveys area's test of electromagnetic disturbance；It should
Acquisition parameter includes：Measuring electrode away from, observation duration, observation period.The acquisition parameter module 94 acquires respectively with electric field signal
Module 91 is connected with magnetic field signal acquisition module 92.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
Specific work process, can refer to preceding method embodiment in corresponding process, details are not described herein.
Embodiment 3
The embodiment of the present invention additionally provides a kind of electromagnetism separation AMT detecting devices, including：Electric field signal harvester and magnetic
Field signal harvester；The electric field signal harvester includes：Not pole in electricity acquisition host 10, towed acquisition cable 11 and water
Polarizing electrode 12；The electricity acquires host 10 and is connected by above-mentioned towed acquisition cable 11 with unpolarizable electrode 12 in above-mentioned water；It should
Magnetic field signal harvester includes：Magnetic acquisition host 13, Magnetic Sensor 14 and magnetic call wire 15；The magnetic acquires host 13 by upper
Magnetic call wire 15 is stated with above-mentioned Magnetic Sensor 14 to be connected；The electric field signal harvester is laid in the waterborne of target acquisition waters,
For acquiring the electric field signal in the target acquisition waters；The magnetic field signal harvester is laid in the target acquisition waters bank
Land, for acquiring the magnetic field signal in the target acquisition waters.
Electromagnetism provided in an embodiment of the present invention detaches AMT detecting devices, and detaching AMT with the electromagnetism that above-described embodiment provides visits
Survey method has identical technical characteristic, so can also solve the technical issues of identical, reaches identical technique effect.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement is carried out to which part technical characteristic；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of electromagnetism detaches AMT detection methods, which is characterized in that applied to AMT, including：
The electric field signal in target acquisition waters is acquired by electric field signal harvester；The electric field signal harvester is laid in
The target acquisition waters it is waterborne；The electric field signal harvester includes：Electricity acquisition host, towed acquisition cable and water
Middle unpolarizable electrode；
The magnetic field signal in the target acquisition waters is acquired by magnetic field signal harvester；The magnetic field signal harvester cloth
It is located at the land on target acquisition waters bank；The magnetic field signal harvester includes：Magnetic acquisition host, Magnetic Sensor
With magnetic call wire；
The electric field signal and the magnetic field signal are transferred to terminal device and obtain the target acquisition to carry out inversion procedure
The resistivity inversion result in waters.
2. electromagnetism according to claim 1 detaches AMT detection methods, which is characterized in that further includes：
Satellite clock signal is received by satellite earth antenna；The satellite clock signal is used to synchronize the electric field signal and institute
State magnetic field signal.
3. electromagnetism according to claim 1 detaches AMT detection methods, which is characterized in that is adopted described by electric field signal
Before the step of electric field signal in acquisition means acquisition target acquisition waters, further include：
Acquisition parameter is obtained by preproduction-type test；The preproduction-type test includes：Measuring electrode is away from experiment, observation duration experiment
With survey area's test of electromagnetic disturbance；The acquisition parameter includes：Measuring electrode away from, observation duration, observation period.
4. electromagnetism according to claim 3 detaches AMT detection methods, which is characterized in that passes through preproduction-type test described
Before the step of obtaining acquisition parameter, further include：
The performance data of the electric field signal harvester and the magnetic field signal harvester is acquired by performance test；
The performance data is used to judge the behavior pattern of the electric field signal harvester and the magnetic field signal harvester；It is described
Performance test includes：Instrumental calibration experiment, the experiment of instrument Consistency test, parallel testing and unpolarizable electrode test examination
It tests.
5. electromagnetism according to claim 1 detaches AMT detection methods, which is characterized in that described in being carried out using scalar fashion
The acquisition of electric field signal and the magnetic field signal.
6. electromagnetism according to claim 1 detaches AMT detection methods, which is characterized in that the method further includes：
It is analyzed according to the resistivity inversion result, obtains the underwater geological conditions construction situation in the target acquisition waters.
7. a kind of electromagnetism detaches AMT detection devices, applied to AMT, which is characterized in that including：
Electric field signal acquisition module, for passing through the electric field signal in electric field signal harvester acquisition target acquisition waters；It is described
Electric field signal harvester is laid in the waterborne of the target acquisition waters；The electric field signal harvester includes：Electricity acquisition
Unpolarizable electrode in host, towed acquisition cable and water；
Magnetic field signal acquisition module, for passing through the magnetic field signal that magnetic field signal harvester acquires the target acquisition waters；
The magnetic field signal acquisition is laid in the land on target acquisition waters bank；The magnetic field signal harvester includes：
Magnetic acquisition host, Magnetic Sensor and magnetic call wire；
Transmission module is obtained for the electric field signal and the magnetic field signal to be transferred to terminal device with carrying out inversion procedure
The resistivity inversion result in the target acquisition waters.
8. electromagnetism according to claim 7 detaches AMT detection devices, which is characterized in that further includes：
Satellite clock module receives satellite clock signal for passing through satellite earth antenna；The satellite clock signal is for same
Walk the electric field signal and the magnetic field signal.
9. electromagnetism according to claim 7 detaches AMT detection devices, which is characterized in that further includes：
Acquisition parameter module obtains acquisition parameter for passing through preproduction-type test；The preproduction-type test includes：Measuring electrode away from
Experiment, the experiment of observation duration and survey area's test of electromagnetic disturbance；The acquisition parameter includes：Measuring electrode away from, observation duration, observation
Period.
10. a kind of electromagnetism detaches AMT detecting devices, which is characterized in that including：
Electric field signal harvester and magnetic field signal harvester；
The electric field signal harvester includes：Unpolarizable electrode in electricity acquisition host, towed acquisition cable and water；The electricity
Acquisition host acquires cable by the towed and is connected with unpolarizable electrode in the water；The magnetic field signal harvester packet
It includes：Magnetic acquisition host, Magnetic Sensor and magnetic call wire；The magnetic acquisition host passes through the magnetic call wire and the Magnetic Sensor
It is connected；
The electric field signal harvester is laid in the waterborne of target acquisition waters, for acquiring the electricity in the target acquisition waters
Field signal；The magnetic field signal harvester is laid in the land on target acquisition waters bank, for acquiring the mesh
The magnetic field signal in mark detection waters.
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| CN114578438A (en) * | 2022-05-05 | 2022-06-03 | 成都理工大学 | Electromagnetic detection system for self-adaptive water area |
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| CN112596108A (en) * | 2020-11-24 | 2021-04-02 | 中国地质科学院地球物理地球化学勘查研究所 | AMT (automated mechanical Transmission) profile detection method, device and equipment |
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