CN108267787B - Electromagnetism separates AMT detection method, device and equipment - Google Patents
Electromagnetism separates AMT detection method, device and equipment Download PDFInfo
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- CN108267787B CN108267787B CN201810081952.9A CN201810081952A CN108267787B CN 108267787 B CN108267787 B CN 108267787B CN 201810081952 A CN201810081952 A CN 201810081952A CN 108267787 B CN108267787 B CN 108267787B
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- G—PHYSICS
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- 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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- 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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Abstract
The present invention provides a kind of electromagnetism separation AMT detection method, device and equipment, are related to underwater technical field of geological exploration, and this method is applied to AMT, comprising: the electric field signal in target acquisition waters is acquired by electric field signal acquisition device；The electric field signal acquisition device 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 acquisition device；The magnetic field signal acquisition device 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 to carry out inversion procedure and obtain the resistivity inversion result in above-mentioned target acquisition waters.The embodiment of the present invention is designed to provide a kind of electromagnetism separation AMT detection method, 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, separate AMT detection method, device more particularly, to a kind of electromagnetism
And equipment.
Background technique
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.
Currently, being applied to the technical method of 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 utilization the natural alternating electromagnetic field research earth electrical property that puts forward French scholar Cagniard (1953) beginning of the fifties
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 line
Source emits pulsatile once magnetic field to underground, observes underground medium using coil or grounding electrode in pulsatile once magnetic field tempus intercalare
In caused secondary inductive loop field, 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
In power be not so good as MT and CSAMT, 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.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of electromagnetism separation AMT detection method, device and equipment, to mention
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, the embodiment of the invention provides a kind of electromagnetism to separate AMT detection method, it is applied to AMT, comprising: logical
Cross the electric field signal in electric field signal acquisition device acquisition target acquisition waters；The electric field signal acquisition device is laid in above-mentioned target
Detect the waterborne of waters；The electric field signal acquisition device includes: the electricity that do not polarize 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 acquisition device；The magnetic field signal acquisition device is laid in
The land on above-mentioned target acquisition waters bank；The magnetic field signal acquisition device includes: that magnetic acquisition host, Magnetic Sensor and magnetic pass
Conducting wire；The electric field signal and the magnetic field signal are transferred to terminal device to carry out inversion procedure and obtain above-mentioned target acquisition waters
Resistivity inversion result.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein should
Electromagnetism separates AMT detection method further include: receives satellite clock signal 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, the embodiment of the invention provides second of possible embodiments of first aspect, wherein
Before the step of acquiring the electric field signal in target acquisition waters above by electric field signal acquisition device, further includes: pass through production
Preceding test obtains acquisition parameter；The preproduction-type test includes: measuring electrode away from test, the test of observation duration and surveys area's electromagnetic interference
Test；The acquisition parameter include: measuring electrode away from, observation duration, observation period.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein before the step of obtaining acquisition parameter above by preproduction-type test, further includes: passability
Energy testing experiment acquires the performance data of above-mentioned electric field signal acquisition device and above-mentioned magnetic field signal acquisition device；The performance data
For judging the behavior pattern of the electric field signal acquisition device and the magnetic field signal acquisition device；The performance test includes:
Instrumental calibration test, the test of instrument Consistency test, parallel testing and unpolarizable electrode testing experiment.
With reference to first aspect, the embodiment of the invention provides the 4th kind of possible embodiments of first aspect, wherein 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, the embodiment of the invention provides the 5th kind of possible embodiments of first aspect, wherein should
Method further include: analyzed according to above-mentioned resistivity inversion result, obtain the underwater geological conditions construction feelings in the target acquisition waters
Condition.
Second aspect, the embodiment of the invention also provides a kind of electromagnetism to separate AMT detection device, is applied to AMT, comprising:
Electric field signal acquisition module, for acquiring the electric field signal in target acquisition waters by electric field signal acquisition device；Electric field letter
Number acquisition device is laid in the waterborne of target acquisition waters；The electric field signal acquisition device includes: that electricity acquires host, towed is adopted
Collect unpolarizable electrode in cable and water；Magnetic field signal acquisition module, for acquiring above-mentioned target by magnetic field signal acquisition device
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
Acquisition device 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 to carry out inversion procedure and obtain the resistivity inversion result in the target acquisition waters.
In conjunction with second aspect, the embodiment of the invention provides the first possible embodiments of second aspect, wherein should
Electromagnetism separates AMT detection device further include: satellite clock module, for receiving satellite clock signal by satellite earth antenna；
The satellite clock signal is for synchronizing above-mentioned electric field signal and above-mentioned magnetic field signal.
In conjunction with second aspect, the embodiment of the invention provides second of possible embodiments of second aspect, wherein should
Electromagnetism separates AMT detection device further include: acquisition parameter module, for obtaining acquisition parameter by preproduction-type test；The production
Preceding test includes: measuring electrode away from test, the test of observation duration and surveys area's test of electromagnetic disturbance；The acquisition parameter includes: measurement
Electrode spacing, observation duration, observation period.
The third aspect, the embodiment of the invention also provides a kind of electromagnetism to separate AMT detecting devices, comprising: electric field signal is adopted
Acquisition means and magnetic field signal acquisition device；The electric field signal acquisition device 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 acquisition device includes: magnetic acquisition host, Magnetic Sensor and magnetic call wire；The magnetic acquires host and passes through above-mentioned magnetic call wire
It is connected with above-mentioned Magnetic Sensor；The electric field signal acquisition device is laid in the waterborne of target acquisition waters, for acquiring the target
Detect the electric field signal in waters；The magnetic field signal acquisition device 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 bring it is following the utility model has the advantages that
Electromagnetism separation AMT detection method, device and equipment provided in an embodiment of the present invention, the electromagnetism separation detection side AMT
Method is applied to AMT, and the electric field signal in target acquisition waters is acquired by electric field signal acquisition device；The electric field signal acquisition device
It is laid in the waterborne of above-mentioned target acquisition waters；The electric field signal acquisition device 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 acquisition device；Magnetic field letter
Number acquisition device is laid in the land on the target acquisition waters bank；The magnetic field signal acquisition device include: 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.
To enable the above objects, features, and advantages of the disclosure to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is 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, is also possible to obtain other drawings based on these drawings.
Fig. 1 is that a kind of electromagnetism provided in an embodiment of the present invention separates AMT detection method application scenarios schematic diagram；
Fig. 2 is that a kind of electromagnetism provided in an embodiment of the present invention separates AMT detection method flow diagram；
Fig. 3 is that a kind of electromagnetism provided in an embodiment of the present invention separates AMT detection method electrode connection mode schematic diagram；
Fig. 4 is that a kind of electromagnetism provided in an embodiment of the present invention separates AMT detection method irrigation canals and ditches bank and irrigation canals and ditches observation waterborne
Comparative result figure；
Fig. 5 is that a kind of electromagnetism provided in an embodiment of the present invention separates the sight waterborne of AMT detection method interference-free coverage area difference duration
Apparent resistivity and phase-contrast figure are tested in test；
Fig. 6 is that a kind of electromagnetism provided in an embodiment of the present invention separates the observation waterborne of AMT detection method interference range different interpolar distance
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 separates 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 separates AMT detection method；
Fig. 9 is the structural schematic diagram that a kind of electromagnetism provided in an embodiment of the present invention separates AMT detection device.
Icon:
10- electricity acquires host；11- towed acquires cable；Unpolarizable electrode in 12- water；13- magnetic acquires host；14- magnetic
Sensor；15- magnetic call wire；91- electric field signal acquisition module；92- magnetic field signal acquisition module；93- satellite clock module；
94- acquisition parameter module；95- transmission module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments 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
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Currently, 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 lesser rivers and lakes of water body；And the latter
The bottom construction recognition capability on then be not so 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 separation AMT detection method, device and equipment provided in an embodiment of the present invention can
To provide, being suitble to waters to observe, underwater equipment is easier, the water-bed stronger Detection Techniques of conformation identification ability.
To be visited to a kind of separation of electromagnetism disclosed in embodiment of the present invention AMT first convenient for understanding the present embodiment
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 calculates view electricity in the mutually orthogonal audio range of ground survey (0.1Hz-50kHz) electric and magnetic fields component
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 handles to obtain target acquisition region by the two parameters
Subsurface resistivity.
In order to which AMT Detection Techniques are applied on waters, the embodiment of the invention provides a kind of electric field signals and magnetic field to believe
Number AMT detection method separately acquired.As shown in Figure 1, for a kind of electromagnetism separation AMT detection method provided in an embodiment of the present invention
Application scenarios schematic diagram, in embodiment shown in fig. 1, electric field signal acquisition device 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, connects on towed acquisition cable 11
There is 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 acquisition device includes: magnetic acquisition master
Machine 13, Magnetic Sensor 14 and magnetic sense 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 method, as shown in Fig. 2, being this hair
A kind of electromagnetism that bright embodiment provides separates AMT detection method flow diagram, the specific steps are that:
Step S201: the electric field signal in target acquisition waters is acquired by electric field signal acquisition device；The electric field signal is adopted
Acquisition means are laid in the waterborne of above-mentioned target acquisition waters；The electric field signal acquisition device 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 12 in water.Electricity is adopted
Collect host 10 and control the electric signal that unpolarizable electrode 12 in water measures target acquisition waters, and acquiring cable 11 by towed will
Electric field signal is passed back and is saved.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.The towed, which acquires cable 11, has stronger intensity, can sustain a fairly large number of water
The weight of middle unpolarizable electrode 12, and it is mobile to draw unpolarizable electrode 12 in water above when moving.
In a kind of wherein embodiment, the model of electricity acquisition host 10 can be MTU-5A or MTU-2E, in addition, electromagnetism
Separate the acquisition system of AMT detection method further include: 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 battery.Satellite earth antenna is for giving
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 acquisition device；Magnetic field letter
Number acquisition device is laid in the land on above-mentioned target acquisition waters bank；The magnetic field signal acquisition device includes: magnetic acquisition master
Machine 13, Magnetic Sensor 14 and magnetic call wire 15.
Magnetic acquisition host 13 is connected by magnetic call wire 15 with Magnetic Sensor 14, and is controlled Magnetic Sensor 14 and acquired target
The magnetic field signal for detecting waters is passed the magnetic field signal back magnetic acquisition host 13 by magnetic call wire 15 and is saved.It is a kind of wherein
In embodiment, the model of magnetic acquisition host 13 can be MTU-5A.Wherein, entire magnetic field signal acquisition device is all laid in
Land, and as close as possible to target acquisition waters.
Step S203: above-mentioned electric field signal and above-mentioned magnetic field signal are transferred to terminal device and obtained with carrying 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, it is arranged in host
There is pluggable TF RAM card, TF card can be taken out and the data in TF RAM card are copied by card reader, and transfers data to
Terminal device, such as laptop.Inversion procedure is carried out using Correlation method for data processing software on the terminal device, at the data
Reason software can be matched software AMT-PRO or MT-SOFT2D of Canadian phoenix company etc., after software inversion procedure
To resistivity inversion result.
In practical operation, before carrying out formal collecting work, first has to passage capacity testing experiment and acquire above-mentioned electric field
The performance data of signal pickup assembly and above-mentioned magnetic field signal acquisition device.The performance data is for judging electric field signal acquisition dress
Set the behavior pattern with magnetic field signal acquisition device.Wherein, above-mentioned performance test includes: instrumental calibration test, instrument one
The test of cause property, parallel testing test and unpolarizable electrode testing experiment.
According to the natural field audio-frequency magnetotelluric magnetic method of People's Republic of China (PRC) geological and mineral professional standard DZ/T 0305-2017
Technical regulation, firstly, before work area goes into operation and instrument break down after require to demarcate instrument with inspection apparatus whether
Normally；Magnetic Sensor 14 should then be calibrated before going into operation.Secondly, also reply participates in the more instruments produced before measurement goes into operation
Consistency comparative test is carried out, and the mean square error of 80% or more 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 requires to be not more than 2%.It is detected finally, unpolarizable electrode 12 in water is placed in water, difference in Electrode Potential between any two is wanted
It asks and is no more than 2mV.
After the completion of above-mentioned performance test and qualification, also acquisition parameter is obtained by preproduction-type test.Wherein,
Above-mentioned preproduction-type test includes: measuring electrode away from test, the test of observation duration and surveys area's test of electromagnetic disturbance, passes through above-mentioned production
It is preceding test obtain work area best-of-breed technology scheme, including following acquisition parameter: measuring electrode away from, observation duration and observation when
Section.Firstly, generally selecting multiple and different electrode spacings according to design sheets and work purpose requirement, being compared to observed result, determine electrode
Away from range；Secondly, determining observation time according to investigation depth and interference level, and observation interval test is carried out, in conjunction with view
Resistivity and the round and smooth continuous situation of phase curve, choose reasonable 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 optimal observation period.
After completing above-mentioned preproduction-type test and obtaining the optimal 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 range 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 is fixed at interval of certain distance, is allowed to protect
It holds along line direction, and is fixed the position angle with forest compass.In a kind of wherein embodiment, as shown in figure 3, real for the present invention
A kind of electromagnetism separation AMT detection method electrode connection mode schematic diagram of example offer, as seen from Figure 3, unpolarizable electrode in water are provided
12 can be used staggered form connection or sequential connection type.The laying principle of Magnetic Sensor 14 is to choose nearest and dry away from measuring point
Lesser bank is disturbed, the azimuth of cable 11 is acquired according to towed, buries Magnetic Sensor 14 using forest compass and level meter,
Magnetic Sensor 14Hy including Magnetic Sensor 14Hx and cross line direction along line direction；Make towed acquisition cable 11 with
Its corresponding Magnetic Sensor 14 intersects vertically, also needs intersection vertical between two horizontal Magnetic Sensors 14, respective azimuth deviation is not
Greater than 1 °.Two horizontal Magnetic Sensors 14 bury spacing not less than 5m, and magnetic senses line cannot be hanging, can not be placed in parallel, often
Soil or stone compacting need to be used every 3m-5m, prevent from shaking, avoiding, which shakes conducting wire because of wind, generates electromagnetic interference.
After observation device laying is ready, according to the acquisition parameter determined, with scalar fashion acquisition target acquisition region
Electric field signal data and magnetic field signal data.It is wanted firstly, checking whether acquisition cable, Magnetic Sensor 14 and signal wire laying reach
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, starting in instrument
Every test is carried out by instrumentation specification afterwards.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, especially the low-frequency range quality of data, not reach requirement such as,
Observation time should be extended, increase stacking fold, to guarantee 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 saved 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 that embodiment provides in order to further illustrate the present invention separates AMT detection method, below with a practical example
Son is explained.Firstly, implementing the AMT observation on the waterborne and bank of small irrigation canals and ditches to having a competition in Tianjin Clintonia udensis periphery irrigation canals and ditches
It tests.Test is using same pole away from (60m), same magnetic field point, 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 bank 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 for illustrating that AMT is observed on the water.
Secondly, to determine that pole span and most preferably observation duration are most preferably observed in trial zone, respectively in the different ditches in 7, Clintonia udensis periphery
Canal point has carried out the comparative test of different interpolar distance waterborne and different observation durations, is determined using electromagnetism separation AMT detection method
Point observation.The electrode spacing of comparative 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 resistivity and phase curve (as shown in Figure 5) of the observation waterborne of no electromagnetic interference point, nothing
By from small pole span to big pole span, big duration is grown to from hour, curve is smooth and form is consistent, illustrate to work in interference-free coverage area,
Job requirement can be met using small pole span and small duration；And in the AMT apparent resistivity 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 are able to satisfy 500m also with the job requirement of 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 distance observation experiment apparent resistivity waterborne and phase pair that embodiment provides
Than figure, test result 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
Carrying out AMT measurement waterborne should observe preferably afternoon.
In a kind of wherein embodiment, by taking the AMT section detection test of Baiyang Lake waters as an example, experimental field it is located at Anxin County
Hold the area villages and small towns Nan Dian, the Baiyang Lake Shu Nan area.Static measurement is carried out using electromagnetism separation AMT detection method, electricity road chain waterborne is 20m
The intersection Connection Mode of spacing, 60m pole span, the electric road ocean weather station observation of every arrangement 3, observes duration 30 minutes.Profile survey total 24
It is a, total length about 1150m.Test data obtains test profile after data processing and one-dimensional, two dimensional inversion calculate
Inverting resistivity section.As shown in figure 8, for a kind of inverting knot of electromagnetism separation AMT detection method provided in an embodiment of the present invention
Fruit schematic diagram analyzes inversion result according to Fig. 8, inverting resistivity section show from top to bottom in-high-medium-low 4 layers of electricity
Resistance rate off-note.Peripherally matter research data transitivity feature, initial guess are thought according to North China Oilfield, from top to bottom
In-the medium-low stratiform electrical structure of height-, it is the reflection of the region layer shape earth formation, has respectively corresponded four stratum, first layer:
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 separates AMT detection method, is applied to AMT, and this method is adopted by electric field signal
The electric field signal in acquisition means acquisition target acquisition waters；The electric field signal acquisition device is laid in the water in above-mentioned target acquisition waters
On；The electric field signal acquisition device includes: that electricity acquires host, towed acquires unpolarizable electrode in 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 acquisition device is laid in the target acquisition
The land on waters bank；The magnetic field signal acquisition device 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 invention also provides a kind of electromagnetism to separate AMT detection device, is applied to AMT, as shown in figure 9, for this
A kind of structural schematic diagram for electromagnetism separation AMT detection device that inventive embodiments provide, as seen from Figure 9, which includes: electric field
Signal acquisition module 91, for acquiring the electric field signal in target acquisition waters by electric field signal acquisition device；The electric field signal
Acquisition device is laid in the waterborne of target acquisition waters；The electric field signal acquisition device includes: that electricity acquires host 10, towed is adopted
Collect unpolarizable electrode 12 in cable 11 and water；Magnetic field signal acquisition module 92, for being acquired by magnetic field signal acquisition device
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 acquisition device includes: magnetic acquisition host 13, Magnetic Sensor 14 and magnetic call wire 15；Transmission module 95, being used 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 with electric field signal acquisition module 91 and magnetic field signal acquisition module 92 respectively.
Wherein, which separates AMT detection device further include: satellite clock module 93, for passing through satellite earth antenna
Receive satellite clock signal；The satellite clock signal is for synchronizing above-mentioned electric field signal and above-mentioned magnetic field signal.The satellite clock
Module 93 is connected with electric field signal acquisition module 91 and magnetic field signal acquisition module 92 respectively.
In addition, the electromagnetism separates AMT detection device further include: acquisition parameter module 94, for being obtained by preproduction-type test
Take acquisition parameter；The preproduction-type test includes: measuring electrode away from test, the test of observation duration and surveys area's test of electromagnetic disturbance；It should
Acquisition parameter include: measuring electrode away from, observation duration, observation period.The acquisition parameter module 94 is acquired with electric field signal respectively
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 corresponding processes in the foregoing method embodiment, details are not described herein.
Embodiment 3
The embodiment of the invention also provides a kind of electromagnetism to separate AMT detecting devices, comprising: electric field signal acquisition device and magnetic
Field signal acquisition device；The electric field signal acquisition device includes: electricity acquisition host 10, not pole in 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 acquisition device includes: magnetic acquisition host 13, Magnetic Sensor 14 and magnetic call wire 15；Magnetic acquisition host 13 passes through upper
Magnetic call wire 15 is stated to be connected with above-mentioned Magnetic Sensor 14；The electric field signal acquisition device is laid in the waterborne of target acquisition waters,
For acquiring the electric field signal in the target acquisition waters；The magnetic field signal acquisition device 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 separates AMT detecting devices, and AMT spy is separated with electromagnetism provided by the above embodiment
Survey method technical characteristic having the same reaches identical technical effect so also can solve identical technical problem.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
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 ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection 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, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；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 in protection of the 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 separates AMT detection method, which is characterized in that be applied to AMT, comprising:
The electric field signal in target acquisition waters is acquired by electric field signal acquisition device；The electric field signal acquisition device is laid in
The target acquisition waters it is waterborne；The electric field signal acquisition device 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 acquisition device；The magnetic field signal acquisition device cloth
It is located at the land on target acquisition waters bank；The magnetic field signal acquisition device 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 separates AMT detection method, which is characterized in that further include:
Satellite clock signal is received by satellite earth antenna；The satellite clock signal is for synchronizing the electric field signal and institute
State magnetic field signal.
3. electromagnetism according to claim 1 separates AMT detection method, which is characterized in that adopted described by electric field signal
Acquisition means acquired before the step of electric field signal in target acquisition waters, further includes:
Acquisition parameter is obtained by preproduction-type test；The preproduction-type test includes: measuring electrode away from test, observation duration test
With survey area's test of electromagnetic disturbance；The acquisition parameter include: measuring electrode away from, observation duration, observation period.
4. electromagnetism according to claim 3 separates AMT detection method, which is characterized in that pass through preproduction-type test described
Before the step of obtaining acquisition parameter, further includes:
Passage capacity testing experiment acquires the performance data of the electric field signal acquisition device and the magnetic field signal acquisition device；
The performance data is used to judge the behavior pattern of the electric field signal acquisition device and the magnetic field signal acquisition device；It is described
Performance test includes: instrumental calibration test, the test of instrument Consistency test, parallel testing and unpolarizable electrode test examination
It tests.
5. electromagnetism according to claim 1 separates AMT detection method, which is characterized in that using described in scalar fashion progress
The acquisition of electric field signal and the magnetic field signal.
6. electromagnetism according to claim 1 separates AMT detection method, which is characterized in that the method also 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 separates AMT detection device, it is applied to AMT characterized by comprising
Electric field signal acquisition module, for acquiring the electric field signal in target acquisition waters by electric field signal acquisition device；It is described
Electric field signal acquisition device is laid in the waterborne of the target acquisition waters；The electric field signal acquisition device includes: electric acquisition
Unpolarizable electrode in host, towed acquisition cable and water；
Magnetic field signal acquisition module, for acquiring the magnetic field signal in the target acquisition waters by magnetic field signal acquisition device；
The magnetic field signal acquisition is laid in the land on target acquisition waters bank；The magnetic field signal acquisition device includes:
Magnetic acquires 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 separates AMT detection device, which is characterized in that further include:
Satellite clock module, for receiving satellite clock signal by 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 separates AMT detection device, which is characterized in that further include:
Acquisition parameter module, for obtaining acquisition parameter by preproduction-type test；The preproduction-type test include: measuring electrode away from
Test, the test of observation duration and survey area's test of electromagnetic disturbance；The acquisition parameter include: measuring electrode away from, observation duration, observation
Period.
10. a kind of electromagnetism separates AMT detecting devices characterized by comprising
Electric field signal acquisition device and magnetic field signal acquisition device；
The electric field signal acquisition device includes: that electricity acquires host, towed acquires unpolarizable electrode in 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 acquisition device packet
Include: magnetic acquires 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 acquisition device is laid in the waterborne of target acquisition waters, for acquiring the electricity in the target acquisition waters
Field signal；The magnetic field signal acquisition device 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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| CN112596108B (en) * | 2020-11-24 | 2022-08-23 | 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 |
| CN114578438B (en) * | 2022-05-05 | 2022-07-12 | 成都理工大学 | Electromagnetic detection system for self-adaptive water area |
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