CN106645962A - Marine soil resistivity measuring method and device - Google Patents
Marine soil resistivity measuring method and device Download PDFInfo
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- CN106645962A CN106645962A CN201611120809.3A CN201611120809A CN106645962A CN 106645962 A CN106645962 A CN 106645962A CN 201611120809 A CN201611120809 A CN 201611120809A CN 106645962 A CN106645962 A CN 106645962A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The invention discloses a marine soil resistivity measuring method and device. The device comprises a probe bar which comprises a top tank, a bar body and a probe. The bar body is connected with the top tank and the probe. The top tank is provided with a hook. A built-in power supply, a control circuit, a constant current source circuit, a data acquisition circuit, a sensing circuit and an acceleration sensor which is connected with the sensing circuit are formed in the top tank. An electrode sequence is formed on the probe. The electrode sequence comprises two power supply electrodes and at least two measuring electrodes. The power supply electrodes and the measuring electrodes are communicated with the outside and are arranged on the probe. The power supply electrodes are connected with the constant current source circuit through a wire located in the bar body. The measuring electrodes are connected with the data acquisition circuit through a wire located in the bar body. According to the invention, in-situ, fast and accurate measurement of the resistivity of marine soil in a certain depth is realized.
Description
Technical field
The invention belongs to Ocean Surveying technical field, is the method and dress for being related to Measuring Oceanic soil resistivity specifically
Put.
Background technology
21st century is the century of ocean, with the laying of submarine pipeline cable, the exploration of submarine oil resources and is opened
Send out, the physical mechanics of ocean soil and engineering geological property are studied, especially complicated deep-sea ocean soil Quality Research is increasingly subject to
The attention of people.In recent years, resistivity Detection Techniques are widely used for the test of ocean soil physical index, resources development and utilization etc.
Link.Resistivity is the basic physical properties index of the conductive capability for characterizing soil, can reflect the basic physico-mechanical properties and structure of soil
Feature etc., therefore the resistivity of Measuring Oceanic soil has important theory significance and using value.
At present, the measurement of ocean soil resistivity is generally using submarine sampling measuring method and electric logging measuring method.Seabed
Sampling and measuring method is to take out ocean soil in situ, then, the resistivity data of the soil sample of taking-up is measured indoors.Electric logging
Method is to excavate to log well flatly first in seabed, then that resistivity probe injection well logging is interior, using resistivity probe measurement sea
The resistivity of foreign soil.
Submarine sampling measuring method is non real-time nature measurement, and causes disturbance to soil sample during soil sampling, changes
The stability of soil layer construction, affects the accuracy of measurement data.Although electric logging measuring method is measurement in real time, can obtain true
Resistivity data, and then obtain soil layer state and geologic assessment parameter.But the method for electric logging is during well logging is excavated
Still the soil layer of borehole wall periphery can be caused compared with large disturbances, this results in the uncertain and inaccuracy of measurement result.Also, electricity
The method of well logging needs to excavate well logging, process complexity, cost and high cost, and the investment of one-shot measurement process is larger.
The content of the invention
It is an object of the invention to provide a kind of method and device of Measuring Oceanic soil resistivity, realizes to ocean soil resistivity
In situ, quick, accurate measurement.
For achieving the above object, the device of the Measuring Oceanic soil resistivity that the present invention is provided adopts following technical proposals
It is achieved：
A kind of device of Measuring Oceanic soil resistivity, described device includes feeler lever, and the feeler lever includes overhead bin, the body of rod
And probe, the body of rod connection overhead bin and the probe；
Hook is formed with the overhead bin, built-in power, control circuit, constant-current source circuit, number are formed with the overhead bin
According to Acquisition Circuit and sensing circuit；The built-in power is the control circuit, the constant-current source circuit, data acquisition electricity
Road and the sensing circuit are powered, the control circuit respectively with the data acquisition circuit, the sensing circuit and the perseverance
Current source circuit connects；The acceleration transducer being connected with the sensing circuit is also formed with the overhead bin；
Electrode sequence is formed with the probe, the electrode sequence includes two current electrodes and at least two measurements
Electrode, the current electrode and the measuring electrode are arranged on the probe in the form of communicating with the external world, the power supply electricity
Pole is connected by the wire in the body of rod with the constant-current source circuit, and the measuring electrode is by the body of rod
Wire be connected with the data acquisition circuit.
Device as above, the probe includes tubular probe body and tapered head, the electrode
Sequence is formed in the probe body, and the cross section of the electrode sequence is vertical with the axis of the probe body.
Device as above, the electrode sequence includes four measuring electrodes, and two current electrodes are along described
The circumferencial direction of probe is symmetrically formed on the probe, and two measuring electrodes in four measuring electrodes form a survey
Amount electrode group, four measuring electrodes form left and right two measuring electrode groups, and described two measuring electrode groups are with described in two
The line of current electrode is symmetrically formed on the probe for symmetry axis, two current electrodes and four surveys
Amount electrode is equidistantly mounted on the probe.
Device as above, is formed with attitude transducer, the attitude transducer and the sensing in the feeler lever
Circuit connects.
Device as above, is formed with pressure sensor, the pressure sensor and the sensing in the feeler lever
Circuit connects.
Device as above, on the body of rod balancing weight is formed with.
To realize aforementioned invention purpose, the method for the Measuring Oceanic soil resistivity that the present invention is provided adopts following technical proposals
To realize：
A kind of method of Measuring Oceanic soil resistivity, methods described adopts above-mentioned measurement device ocean soil resistivity, institute
The method of stating includes：
Feeler lever in said device to during ocean soil injection, using the constant-current source circuit in described device to institute
State in device two current electrodes to power, using two surveys in the data acquisition circuit collection described device in described device
Electrode potential between amount electrode, according to following formula Real-Time Ocean soil resistivity is obtained：
Wherein, ρ is Real-Time Ocean soil resistivity, and K is electrode coefficient, and C1P1 is the first power supply in two current electrodes
The distance between electrode and first measuring electrode in the measuring electrode, C2P1 is the second power supply electricity in two current electrodes
The distance between pole and described first measuring electrode, C1P2 is first current electrode and the second measuring electrode in measuring electrode
The distance between, C2P2 is the distance between second current electrode and described second measuring electrode, △ UP1P2For described
Real-time potential difference between one measuring electrode and second measuring electrode, I be described device in constant-current source circuit export to
Alternation DC current on the current electrode；
Meanwhile, in the feeler lever to during ocean soil injection, using the inspection of the acceleration transducer in described device
Survey the real-time deep that result obtains the feeler lever injection ocean soil；
Based on the real-time deep and Real-Time Ocean soil resistivity, the ocean of ocean soil depth and the depth is obtained
One-to-one relation between native resistivity.
Method as above, the feeler lever includes four measuring electrodes, and four measuring electrodes are constituted for surveying
Measure two measuring electrode groups of the ocean soil resistivity of same ocean soil depth, the corresponding ocean soil electricity of the ocean soil depth
Resistance rate is the mean value of the Real-Time Ocean soil resistivity that two measuring electrode groups are obtained.
Method as above, methods described also includes：
Feeler lever in said device obtains the angle of inclination of the feeler lever to during ocean soil injection；
The angle of inclination of the feeler lever is made comparisons with set angle；
If the angle of inclination of the feeler lever is more than the set angle, the Real-Time Ocean acquired during this is abandoned
Native resistivity.
Compared with prior art, advantages of the present invention and good effect are：The Measuring Oceanic soil resistivity that the present invention is provided
Device in, be power supply during feeler lever injection ocean soil by arranging the probe with current electrode and measuring electrode
Electrode power supply forms electric field, and the electric field can be produced and ocean soil resistance through the effect of ocean soil in the measuring electrode of probe
The corresponding potential difference of the size of rate, by measuring the measurement that the potential difference is capable of achieving to ocean soil resistivity, what is obtained is
Horizontal resistivity data, can accurately react the layering of ocean soil, high resolution.Because measurement process is in feeler lever injection
In real time measurement during ocean soil, thus, the in site measurement of the resistivity to ocean soil is not only realized, obtain and will not
Disturbance is caused to ocean soil, it is ensured that the accuracy of DATA REASONING；Also, feeler lever can at any time put into as needed seabed,
Measurement well need not be pre-set, measurement is simple, convenient, low cost.
After the specific embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more clear
Chu.
Description of the drawings
Fig. 1 is the stereogram of the device one embodiment based on Measuring Oceanic of the present invention soil resistivity；
Fig. 2 is the sectional view of Fig. 1 embodiments；
Fig. 3 is the structural representation of electrode sequence in Fig. 1 embodiments；
Fig. 4 is the circuit theory diagrams of Fig. 1 embodiments；
Fig. 5 is the flow chart of the method one embodiment based on Measuring Oceanic of the present invention soil resistivity；
Fig. 6 is the curve of the method acquisition of the device based on Fig. 1 and Fig. 5.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below with reference to drawings and Examples,
The present invention is described in further detail.
Refer to one embodiment of the device based on Measuring Oceanic of the present invention soil resistivity shown in Fig. 1 to Fig. 4.Its
In, Fig. 1 and Fig. 2 is respectively the stereogram and sectional view of the embodiment, and Fig. 3 is the structural representation of electrode sequence, and Fig. 4 is the reality
Apply the circuit theory diagrams of example.
Anticipate as shown in Figures 1 to 4, the embodiment is used for the device of Measuring Oceanic soil resistivity and includes feeler lever 100, feeler lever
100 include overhead bin 1, the body of rod 2 and probe 3, the connection overhead bin 1 of the body of rod 2 and probe 3.
Specifically, overhead bin 1 be by stainless steel material as housing, be internally formed the structure of cavity.Overhead bin 1 is included
Nacelle, upper end cover and bottom end cover (not marking in figure), upper and lower end cap is threaded connection respectively with nacelle, and solid by nut
It is fixed.Hook 11 is formed with the top of overhead bin 1, using the hook 11, with connection cable, and then can will entirely be visited by hawser
Bar 100 is connected with hull, realizes aboard ship easily to seabed throwing feeler lever 100 and the feeler lever 100 in seabed is towed back on ship.
Battery flat 12 and the two parts of circuit board chamber 13 are formed with the internal cavities of overhead bin 1, as the battery of built-in power electricity is arranged on
In pond cabin 12, two pieces of circuit boards are mounted vertically in side by side in circuit board chamber 13, and battery and circuit board are fixed on into bracket by nut
On.Bracket is made up of dielectric resin material, can pass through the length of nut regulating cell cabin 12 and circuit board chamber 13, to adapt to difference
Size.
Control circuit, constant-current source circuit, data acquisition circuit and sensing circuit are included on circuit board in overhead bin 1.It is interior
Put power supply to power for control circuit, constant-current source circuit, data acquisition circuit and sensing circuit, control circuit respectively with data acquisition
The connection of circuit, sensing circuit and constant-current source circuit.Additionally, being also formed with the acceleration sensing being connected with sensing circuit in overhead bin 1
Device (not shown).In feeler lever 100, specifically the acceleration that is connected with sensing circuit can be formed in overhead bin 1 and passed
Sensor, control circuit can be sampled by sensing circuit according to the frequency synchronous with alternating current to acceleration transducer,
And the acceleration signal to obtaining obtains the real-time deep of feeler lever injection ocean soil through time-domain integration twice.
Wherein, constant-current source circuit can include A/D change-over circuits, D/A change-over circuits, current regulator, protection circuit and
Sampling resistor.Data acquisition circuit can include A/D change-over circuits, Anti-aliasing Filter Circuits, signal front-end processing circuit, load
Circuit and high speed COMS bus exchange switch and filter circuit.But the structure is not limited to, identical work(can also can be realized using other
Can structure realizing.
The body of rod 2 is the tubular structure with hollow cavity, the mode that can be threaded connection respectively with overhead bin 1 and probe
3 connections.The depth of the submarine soil layer that the length of the body of rod 2 can be measured as needed is selected.Preferably, the housing of the body of rod 2
Realized using sandwich construction, outermost material is Kynoar (PVDF), the second layer is hollow stainless steel tube.Stainless
Wire 5 is installed with the hollow cavity of steel pipe.
Used as the core measurement part of feeler lever 100, preferred structure is the spy for including the tubular with hollow cavity to probe 3
Head main body 31 and tapered head 32, wherein, the upper end of probe body 31 is connected with the body of rod 2, and head 32 is away from the body of rod 2.Head
Portion 32 as head position from whole feeler lever 100 to injection in ocean soil, from the structure of taper, material is stainless steel, is beneficial to
In injection soil.The housing of probe body 31 using with the housing identical sandwich construction of the body of rod 2 realizing.
An electrode sequence 33 is formed with probe body 31, the structure of electrode sequence is described below.
Electrode sequence 33 includes two current electrodes and four measuring electrodes, respectively the first current electrode C1, second
Current electrode C2, the first measuring electrode P1, the second measuring electrode P2, the 3rd measuring electrode P3 and the 4th measuring electrode P4.This six
Individual electrode is equidistantly embedded in probe body 31 in the form of communicating with the external world.Specifically, in the housing of probe body 31
Above, circumferentially six holes are offered on direction, an electrode is inlaid with each hole.In two current electrodes, first supplies
Electrode C1 and the second current electrode C2 are connected respectively by the wire 5 in the body of rod 2 with the constant-current source circuit in overhead bin 1, four
Measuring electrode is also connected by wire 5 respectively with the data acquisition circuit in overhead bin 1.Also, the first current electrode C1 and second
Current electrode C2 is symmetrical along the circumferencial direction of probe, and in four measuring electrodes, the first measuring electrode P1 and second is measured
Electrode P2 forms a measuring electrode group, and the 3rd measuring electrode P3 and the 4th measuring electrode P4 form another measuring electrode group,
Two measuring electrode groups are symmetrically embedded in the line of the first current electrode C1 and the second current electrode C2 as symmetry axis
In probe body 31.Certainly, in other embodiments, measuring electrode can also only have two, measuring electrode and current electrode
Arrangement can also be other structures.
And, used as preferred embodiment, the cross section of electrode sequence 33 is vertical with the axis of probe body 31.
That is, when probe body 31 is in vertical direction, first electrode sequence 33 is horizontal direction.So as to, when probe body 31 it is vertical
When in injection ocean soil, it is possible to use electrode sequence realizes the measurement of ocean soil transverse resistivity.But this is not limited to, at other
Embodiment in, the cross section of electrode sequence can not also be vertical with the axis of probe body 31.
Additionally, being also formed with balancing weight 4 on the body of rod 2.Balancing weight 4 is removably formed on the body of rod 2, close
The position of overhead bin 2.By arranging balancing weight 4, the weight that can pass through change balancing weight 4 adjusts the weight of feeler lever 100, to adapt to
The ocean soil deposit of heterogeneity, increases the accuracy of resistivity measurement.
As preferred embodiment, in this embodiment, also formed in feeler lever 100, specifically in probe 3
There is attitude transducer, it is connected also by wire 5 with the sensing circuit in overhead bin 1.By arranging attitude transducer, can interpolate that
Go out the size whether feeler lever 100 there occurs inclination and angle of inclination during injection ocean soil, and then can be to measurement
Resistivity data carries out aid in treatment, improves the accuracy of measurement data.More specifically principle and method are with reference to description below.
Further, it is also possible in feeler lever 100, specifically the pressure sensor being connected with sensing circuit can be formed in overhead bin 1, profit
Real-time monitoring is carried out to the pressure suffered by feeler lever 100 with pressure sensor, it is to avoid depth of penetration is excessive, pressure is excessive and damage is visited
Bar 100.
During the device busy with said structure, control circuit receives the instruction that host computer sends, by current regulator
The control signal of D/A change-over circuits is received, after protection circuit, sampling resistor is sampled to current signal and is sent to A/D and turns
Unit is changed, the closed loop feedback control of constant-current source circuit is completed.Data acquisition circuit, will by high speed COMS bus exchange switch and filter circuit
The DC source of constant-current source circuit output is changed into that frequency is certain, the such as alternating current of 1KHz, and alternating current is by the first power supply electricity
Pole C1 and the second current electrode C2 is electrode sequence continued power, the first measuring electrode P1, the second measurement electricity in electrode sequence
Pole P2, the 3rd measuring electrode P3 and the 4th measuring electrode P4 will continue output electrode current potential.In order to coordinate data acquisition circuit pair
The pickup of tiny signal, constant-current source circuit can add pseudo-random signal to extract useful signal for data acquisition circuit.This skill
The application of art efficiently solves the difficult problem for receiving tiny signal in seawater under low-resistivity environment.The output of four measuring electrodes
Electrode potential is exported in Anti-aliasing Filter Circuits Jing after signal front-end processing circuit is filtered and amplifies, and signal is carried out
Anti-aliasing process, aliasing frequency component in the level of output is preferably minimized.Finally, the electric potential signal Jing A/D conversion electricity of collection
Transmit into control circuit on road.At the same time, control circuit according to the frequency synchronous with alternating current to acceleration transducer
Detection data is sampled such that it is able to obtain the parallel resistance rate curve of two resistivity changes with depth, by two groups of resistance
Rate data are corresponded and calculate average, obtain final resistivity curve.Data in measurement process can pass through control circuit
Upload in memory cell, such as SD card and store.More specifically method of work is shown in Figure 5 and the description to Fig. 5 below.
Fig. 5 is referred to, the figure show the flow process of the method one embodiment based on Measuring Oceanic of the present invention soil resistivity
Figure, is the one embodiment for the measuring method that ocean soil resistivity is realized based on the device of Fig. 1 embodiments specifically.
As schematically shown in Figure 5, in combination with Fig. 1 to Fig. 4 device embodiment structure and description, the embodiment realized to sea
The measuring method of foreign soil resistivity comprises the steps：
Step 51：By feeler lever to ocean soil injection.
When needing to measure the resistivity of somewhere seabed ocean soil, the steamer for carrying the feeler lever 100 of Fig. 1 embodiments is opened
Somewhither, then, feeler lever 100 is vertically thrown into seabed so that feeler lever 100 enters seabed in the way of freely falling body.In feeler lever
Under 100 own wt effect, feeler lever 100 is to ocean soil injection.
Before this, suitable balancing weight is configured on feeler lever 100 previously according to the characteristic of the bottom sediment to be measured
5。
Step 52：Powered for current electrode using constant-current source circuit, using between data acquisition circuit collection measuring electrode
Potential difference；The real-time deep of feeler lever injection ocean soil is obtained using acceleration transducer.
It is electrode sequence using the constant-current source circuit in overhead bin 1 when the probe 3 of feeler lever 100 touches ocean soil
In current electrode power.Current electrode produces electric field, in the electric field action Yu Haiyang soil, by contacted with marine soil phase
Potential difference is produced between two measuring electrodes in individual measuring electrode group, the potential difference can be adopted by data acquisition circuit
Collection.
Meanwhile, obtain the real-time deep of feeler lever injection ocean soil using the testing result of the acceleration transducer in device.
The realization of the process may be referred to prior art.
Step 53：Real-Time Ocean soil resistivity is obtained according to the electrode potential of step 52 measurement.
The size of the electrode potential that step 52 is collected is not only related to the position between the size for electric field, electrode,
It is also related to the resistivity of ocean soil.Can be determined by alternating constant current source for the size of electric field, specifically, such as Fig. 4
It is shown, it is that direct current is changed into by alternating constant current source by high speed COMS bus exchange switch, alternation DC current is added to electrode by C1, C2
In sequence.Position between electrode is known, and electrode potential can be collected by data acquisition circuit.Therefore, pass through
Certain mode can be calculated and the one-to-one ocean soil resistivity of electrode potential for being gathered.
By taking the electrode sequence 33 in Fig. 3 as an example, Real-Time Ocean soil resistivity can be obtained according to following formula：
Wherein, ρ is Real-Time Ocean soil resistivity, and K is electrode coefficient, and C1P1 is that two the first current electrode C1 and first are surveyed
The distance between amount electrode P1, C2P1 is the distance between the second current electrode C2 and the first measuring electrode P1, and C1P2 is first
The distance between current electrode C1 and the second measuring electrode P2, C2P2 is between the second current electrode C2 and the second measuring electrode P2
Distance, △ UP1P2For the real-time potential difference between the first measuring electrode P1 and the second measuring electrode P2, I for constant-current source export to
Alternation DC current on current electrode.In above-mentioned formula, the distance between electrode is also fixed after the fixation of feeler lever 100
And known, electric current I and electrode potential △ UP1P2Acquisition can be measured, therefore, obtaining real-time electric current I and electrode
Current potential △ UP1P2Afterwards, you can calculate real-time ocean soil electricalresistivityρ using above-mentioned formula, so as to acquisition one and injection
The related resistivity curve of depth.
Same method, while can calculate using measured between the 3rd measuring electrode P3 and the 3rd measuring electrode P4
Another Real-Time Ocean soil resistivity for calculating of potential difference meter.And, four measuring electrodes are in same level, and first
Real-Time Ocean soil resistivity and the 3rd measuring electrode P3 and the 4th measurement that measuring electrode P1 and the second measuring electrode P2 are obtained
The Real-Time Ocean soil resistivity that electrode P4 is obtained is the resistivity of ocean soil in same depth.
Feeler lever 100 is constantly to during ocean soil injection, can in real time obtaining multiple ocean soils electricity not in the same time
Resistance rate.
Step 54：Based on real-time deep and Real-Time Ocean soil resistivity, the ocean of ocean soil depth and the depth is obtained
One-to-one relation between native resistivity.
If determined in the not depth of the injection ocean soil of feeler lever 100 in the same time by acceleration transducer, then, so that it may
To obtain one-to-one relation between ocean soil depth and the ocean soil resistivity of the depth.So as to obtaining ocean soil and hanging down
The resistivity of different soil upwards.
Specific work process is as follows：
Control circuit receives the instruction that host computer sends, and by current regulator the control signal of D/A change-over circuits is received, and leads to
After overprotection circuit, sampling resistor is sampled to current signal and is sent to A/D converting units, and the closed loop for completing constant-current source circuit is anti-
Feedback control.Data acquisition circuit is changed into the DC source that constant-current source circuit is exported by high speed COMS bus exchange switch and filter circuit
Frequency is certain, the such as alternating current of 1KHz, and alternating current is electrode sequence by the first current electrode C1 and the second current electrode C2
Row continued power, the first measuring electrode P1, the second measuring electrode P2, the 3rd measuring electrode P3 and the 4th measurement in electrode sequence
Electrode P4 will continue output electrode current potential.In order to coordinate pickup of the data acquisition circuit to tiny signal, constant-current source circuit can be with
Pseudo-random signal is added to extract useful signal for data acquisition circuit.The application of this technology efficiently solves low electricity in seawater
A difficult problem for tiny signal is received under resistance rate environment.The electrode potential Jing signal front-end processings circuit of four measuring electrode outputs is carried out
After filtering and amplification, export in Anti-aliasing Filter Circuits, anti-aliasing process is carried out to signal, aliasing frequency in the level that will be exported
Rate component is preferably minimized.Finally, the electric potential signal Jing A/D change-over circuits of collection are transmitted into control circuit.At the same time, control
Circuit is sampled according to the frequency synchronous with alternating current to the detection data of acceleration transducer such that it is able to obtain two
The parallel resistance rate curve of resistivity changes with depth, two groups of resistivity datas is corresponded and calculates average, obtains final
Resistivity curve.Data in measurement process can be uploaded in memory cell, such as SD card by control circuit and stored.Such as Fig. 6
Electrode potential and the relation curve of depth that the method for device and Fig. 5 of the shown curve as based on Fig. 1 is obtained.In figure,
Curve 1 is that the first measuring electrode P1 in electrode sequence 33 and the potential difference measured by the second measuring electrode P2 are bent with the relation of depth
Line, curve 2 is the 3rd measuring electrode P3 in electrode sequence 33 and the pass of the potential difference measured by the 4th measuring electrode P4 and depth
It is curve.From the curve of Fig. 6, can reflect that electrode potential changes with the change of depth of penetration.
It is that current electrode is supplied during feeler lever injection ocean soil during using said method Measuring Oceanic soil resistivity
Electric forming electric field, the electric field can be produced big with ocean soil resistivity through the effect of ocean soil in the measuring electrode of probe
Little corresponding electrode potential, by measuring the i.e. achievable measurement to ocean soil resistivity of the electrode potential, and obtains different
The transverse resistivity of the soil layer of depth, and then it is obtained in that the physical mechanics shape of layer shape of the reflection soil layer on different depth
State.Because measurement process is the measurement in real time during feeler lever injection ocean soil, thus, not only realize to ocean soil
The in site measurement of resistivity, and disturbance will not be caused to ocean soil, it is ensured that the accuracy of DATA REASONING；Also, feeler lever can be with
Put into seabed at any time as needed, without the need for pre-setting measurement well, measurement is simple, convenient, low cost.
It is to reduce because feeler lever 100 inclines for the measurement process for requiring feeler lever 100 and being measured with injection vertically downward
Tiltedly the inaccurate of measurement data is caused, the inclination journey of feeler lever 100 can be judged using attitude transducer in measurement process
Degree.Specifically, in feeler lever to during ocean soil injection, acquisition obtains feeler lever using the detection data of attitude transducer
Angle of inclination；Then, the angle of inclination of feeler lever is made comparisons with set angle；If the angle of inclination of feeler lever is more than set angle
Degree, abandons Real-Time Ocean soil resistivity acquired during this.For example, set angle is 15 °, if feeler lever angle of inclination is big
In 15 °, then it is assumed that angle of inclination is excessive, the resistivity data obtained in this process is abandoned.
Above example is only illustrating technical scheme, rather than is limited；Although with reference to aforementioned reality
Apply example to be described in detail the present invention, for the person of ordinary skill of the art, still can be to aforementioned enforcement
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging claimed technical solution of the invention of appropriate technical solution.
Claims (9)
1. the device of a kind of Measuring Oceanic soil resistivity, it is characterised in that described device includes feeler lever, and the feeler lever is included
Overhead bin, the body of rod and probe, the body of rod connects the overhead bin and the probe；
Hook is formed with the overhead bin, built-in power, control circuit, constant-current source circuit, data is formed with the overhead bin and is adopted
Collector and sensing circuit；The built-in power be the control circuit, the constant-current source circuit, the data acquisition circuit and
The sensing circuit is powered, the control circuit respectively with the data acquisition circuit, the sensing circuit and the constant-current source
Circuit connects；The acceleration transducer being connected with the sensing circuit is also formed with the overhead bin；
Electrode sequence is formed with the probe, the electrode sequence includes two current electrodes and at least two measurement electricity
Pole, the current electrode and the measuring electrode are arranged on the probe in the form of communicating with the external world, the current electrode
It is connected with the constant-current source circuit by the wire in the body of rod, the measuring electrode is by the body of rod
Wire is connected with the data acquisition circuit.
2. device according to claim 1, it is characterised in that the probe includes tubular probe body and in cone
The head of shape, the electrode sequence is formed in the probe body, the cross section of the electrode sequence and the probe body
Axis it is vertical.
3. device according to claim 2, it is characterised in that the electrode sequence includes four measuring electrodes, two
The current electrode is symmetrically formed on the probe along the circumferencial direction of the probe, two in four measuring electrodes
Measuring electrode forms a measuring electrode group, and four measuring electrodes form left and right two measuring electrode groups, described two surveys
Amount electrode group is symmetrically formed on the probe by symmetry axis of the line of two current electrodes, two confessions
Electrode and four measuring electrodes are equidistantly mounted on the probe.
4. device according to any one of claim 1 to 3, it is characterised in that attitude biography is formed with the feeler lever
Sensor, the attitude transducer is connected with the sensing circuit.
5. device according to any one of claim 1 to 3, it is characterised in that pressure biography is formed with the feeler lever
Sensor, the pressure sensor is connected with the sensing circuit.
6. device according to any one of claim 1 to 3, it is characterised in that be formed with balancing weight on the body of rod.
7. the method for a kind of Measuring Oceanic soil resistivity, it is characterised in that methods described is using the dress described in the claims 1
Measuring Oceanic soil resistivity is put, methods described includes：
Feeler lever in said device to during ocean soil injection, using the constant-current source circuit in described device to the dress
Two current electrodes in putting are powered, using two measurement electricity in the data acquisition circuit collection described device in described device
Electrode potential between pole, according to following formula Real-Time Ocean soil resistivity is obtained：
Wherein, ρ is Real-Time Ocean soil resistivity, and K is electrode coefficient, and C1P1 is the first current electrode in two current electrodes
With the distance between first measuring electrode in the measuring electrode, C2P1 be two current electrodes in the second current electrode with
The distance between described first measuring electrode, C1P2 is between the second measuring electrode in first current electrode and measuring electrode
Distance, C2P2 is the distance between second current electrode and described second measuring electrode, △ UP1P2Survey for described first
Real-time potential difference between amount electrode and second measuring electrode, I is that the constant-current source circuit in described device is exported to described
Alternation DC current on current electrode；
Meanwhile, in the feeler lever to during ocean soil injection, tied using the detection of the acceleration transducer in described device
Fruit obtains the real-time deep of the feeler lever injection ocean soil；
Based on the real-time deep and Real-Time Ocean soil resistivity, the ocean soil electricity of ocean soil depth and the depth is obtained
One-to-one relation between resistance rate.
8. method according to claim 7, it is characterised in that the feeler lever includes four measuring electrodes, described four
Measuring electrode constitutes two measuring electrode groups for measuring the ocean soil resistivity of same ocean soil depth, the ocean soil depth
Corresponding ocean soil resistivity is the mean value of the Real-Time Ocean soil resistivity that two measuring electrode groups are obtained at degree.
9. the method according to claim 7 or 8, it is characterised in that methods described also includes：
Feeler lever in said device obtains the angle of inclination of the feeler lever to during ocean soil injection；
The angle of inclination of the feeler lever is made comparisons with set angle；
If the angle of inclination of the feeler lever is more than the set angle, Real-Time Ocean soil electricity acquired during this is abandoned
Resistance rate.
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| CN114706130A (en) * | 2022-02-28 | 2022-07-05 | 中国海洋大学 | Method for in-situ measurement of vertical distribution range of seabed bubble type shallow gas |
| CN114924322A (en) * | 2022-02-28 | 2022-08-19 | 中国海洋大学 | Method for in-situ measurement of gas content of bubble type shallow layer gas based on point-like electrode probe rod |
| CN114924322B (en) * | 2022-02-28 | 2023-09-26 | 中国海洋大学 | Method for in-situ measurement of bubble type shallow gas content based on dot electrode probe rod |
| CN114706130B (en) * | 2022-02-28 | 2023-09-26 | 中国海洋大学 | Method for in-situ measurement of vertical distribution range of seabed bubble type shallow air |
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