CN105785478B - A kind of system for being applied to surface polarization effect between test solid phase sample and current electrode - Google Patents
A kind of system for being applied to surface polarization effect between test solid phase sample and current electrode Download PDFInfo
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- CN105785478B CN105785478B CN201610226793.8A CN201610226793A CN105785478B CN 105785478 B CN105785478 B CN 105785478B CN 201610226793 A CN201610226793 A CN 201610226793A CN 105785478 B CN105785478 B CN 105785478B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V13/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups G01V1/00 – G01V11/00
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention belongs to electrical method Geological Prediction correlative technology field, and disclose a kind of system for being applied to surface polarization effect between test solid phase sample and current electrode, it includes signal generating unit, sample measurement unit, data acquisition unit and CPU, wherein signal generating unit is used for the sine voltage signal for producing constant amplitude and frequency change, then amplifies and be converted to the sine-wave current signal of constant amplitude；Sample measurement unit loads sine-wave current signal and carrys out effect of induced polarization on the interface between current electrode and solid phase sample, and is equidistantly inserted in solid phase sample using multiple measuring electrodes, and thus the magnitude of voltage between each measurement point and current electrode is measured；Data acquisition unit multi-path gathers measurement data, is then sent to CPU and result is calculated.By means of the invention it is possible to solve the peculiar requirement of the surface polarization effect test between solid phase sample and current electrode, and improve the result precision of advance geologic prediction.
Description
Technical field
The invention belongs to electrical method Geological Prediction correlative technology field, is applied to test solid phase examination more particularly, to one kind
The system of surface polarization effect between sample and current electrode.
Background technology
In geologic prospect field, it will usually using to induced polarization method come the effect of induced polarization according to rock, ore so as to
Find metalliferous mineral and solve the problems such as hydrogeology, engineering geology.Induced polarization method can be divided into time-domain induced polarization method and
The prediction of frequency-domain IP method two types, wherein Beam advance geologics is based on frequency-domain IP method, is TBM
A kind of method for forecasting advanced geology commonly used in tunnel piercing, it is advantageous to by using appropriate advance geologic Predicting Technique
Front geological condition is verified, carries out corresponding safeguard procedures, so that it is guaranteed that construction safety is normally carried out.
The prediction of Beam advance geologics body is still in the research and development elementary step in China, to effectively improve test accuracy, it would be highly desirable to
Improve its measuring technology.At present, Beam methods of the prior art are that current electrode is arranged on TBM shields, entirely
Equipment contacts as current emission source with surrounding medium, and direct measurement shield voltage.Due to shield and country rock in the case of energization
Between there is very big surface polarization effect, and this surface polarization effect is larger for the total polarity effect of geologic body, this
Kind surface polarization voltage is directly superimposed upon between shield and other end current electrode on the voltage of electrical circuit again, therefore the face of shield
Polarization can directly influence the accuracy of forward probe.Existing surface polarization experiment test is all between current electrode and liquid
Interface carry out, and for the surface polarization effect measurement between solid phase sample and current electrode, due to being measured in solid sample
Electrode can not possibly be as moving freely in a liquid, therefore is unable to infinite approach solid current electrode surface, causes existing
Surface polarization experiment test scheme is difficult to better conform to actual condition.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides one kind be applied to test solid phase sample with
The system of surface polarization effect between current electrode, wherein passing through the structure to the especially multiple key components of its overall measuring principle
Composition and its set-up mode etc. are studied and designed, and mutually should be able to preferably meet the face between solid phase sample and current electrode
Polarity effect tests peculiar requirement, and is remarkably improved the result precision for address prediction of exceeding the time limit compared with prior art, simultaneously
Possesses the advantages that compact-sized, to be easy to manipulation and operating efficiency high.
To achieve the above object, it is proposed, according to the invention, provide a kind of be applied between test solid phase sample and current electrode
The system of surface polarization effect, it is characterised in that the system include signal generating unit, signal amplification unit, sample measurement unit,
Data acquisition unit and CPU, wherein：
The signal generating unit is used for the sine voltage signal for producing constant amplitude and frequency change, its one end and institute
State CPU signal to be connected, the other end is connected with the signal amplification unit and exports sine voltage signal；It is described
Signal amplification unit is used to receive and amplify inputted sine voltage signal, and is converted into corresponding sine wave electricity
Stream signal continues to output；
The sample measurement unit includes material barrel, current electrode and measuring electrode, and wherein the material barrel is by insulating materials
It is made, and solid phase sample to be tested is filled with inside it；The current electrode is opposed to each other installed in the material barrel
The left and right sides, and be inserted into solid phase sample each via laterally protruding structural member and contact therewith；In addition, the signal amplification
Unit, current electrode and solid phase sample together form loop, and the sine-wave current signal of signal amplified signal output
It is loaded on the interface between the current electrode and the solid phase sample, and induced polarization effect is produced in alternating electric field
Should；The quantity of the measuring electrode is multiple, and they are inserted into solid phase sample at the top of the material barrel respectively connects therewith
Touch, and keep being equally spaced between all measuring electrodes, be consequently for each measurement point on solid phase sample and the power supply electricity
The relevant informations such as the magnitude of voltage between pole are measured in real time；
One end of the data acquisition unit is connected with the CPU signal, and the other end is provided with multiple data
Acquisition channel, these data acquisition channels are corresponding one by one with the measuring electrode, and for each measuring electrode
Measurement data is acquired, and corresponding signal then is delivered into the CPU；The CPU is used for institute
State signal generating unit to provide for producing the signal of different sine voltage signals, while receive, store and handle and come from institute
Data acquisition unit signal is stated, and then the surface polarization effect value being calculated between solid phase sample and current electrode.
As it is further preferred that the current electrode, measuring electrode are preferably made up of Steel material.
As it is further preferred that the signal amplification unit is preferably constant-current source.
As it is further preferred that the surface polarization effect value between the solid phase sample and current electrode preferably according to following
Formula is calculated：
Wherein, ηRsRepresent the surface polarization effect value between the solid phase sample and current electrode；Represent solid phase sample
Low-frequency resistance between current electrode, its unit are ohm；Represent the high-frequency electrical between solid phase sample and current electrode
Resistance, its unit is ohm.
In general, by the contemplated above technical scheme of the present invention compared with prior art, by integrally being surveyed to it
Amount principle is particularly multiple crucial component units, and for example the structure composition of sample measurement unit and set-up mode and signal occur
Running parameter of unit etc. is studied and designed, and can effectively overcome in existing equipment in solid sample measuring electrode not
The problems such as moving freely, preferably meet the peculiar requirement of the surface polarization effect test between solid phase sample and current electrode,
Be provided simultaneously with it is compact-sized, be easy to manipulation and operating efficiency it is high the advantages that, be therefore particularly suitable for solid phase sample and current electrode
Between surface polarization effect test-purpose, while can also be applied to other mutually the high-precision polarization characteristic at interface ground between electrode
Study carefully occasion.
Brief description of the drawings
Fig. 1 is according to the system for being applied to polarity effect between test solid phase sample and current electrode constructed by the present invention
Unitary construction schematic diagram；
Fig. 2 is the structure sectional view for more specifically showing material barrel shown in Fig. 1；
Fig. 3 is the structure sectional view according to the current electrode of the preferred embodiment of the present invention；
Fig. 4 more specifically shows the measurement application scenarios schematic diagram of solid phase sample in Fig. 1.
In all of the figs, identical reference is used for representing identical element or structure, wherein：
1- signal generating unit 2- signal amplification unit 3- sample measurement unit 4- data acquisition unit 5- centres
Manage unit 31- material barrel 32- current electrode 33- measuring electrode 321- cylinder 322- through holes
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
Fig. 1 is according to the system for being applied to polarity effect between test solid phase sample and current electrode constructed by the present invention
Unitary construction schematic diagram.As shown in fig. 1, the system mainly includes signal generating unit 1, signal amplification unit 2, sample survey
Unit 3, data acquisition unit 4 and CPU 5 etc. are measured, these parts are carried out with specific explanations one by one below and is said
It is bright.
Signal generating unit 1 is for example the form of signal generator, and for producing constant amplitude and frequency change just
String wave voltage signal, its one end are connected with the signal of CPU 5, and the other end is for example positive and negative electrode, and respectively with signal
The positive and negative electrode of amplifying unit 2 is connected, and exports sine voltage signal.
Signal amplification unit 2 is for example in the form of constant-current source, and for receiving and amplifying inputted sine voltage letter
Number, and be converted into corresponding sine-wave current signal and continue to output, namely keep original constant amplitude and frequency.So
Afterwards, the sine-wave current signal is loaded into the current electrode that will be described in detail below by the positive and negative electrode of constant-current source and tried with solid phase
On interface between sample, and effect of induced polarization is produced in alternating electric field.
As another key component of the present invention, sample measurement unit 3 includes material barrel 31, current electrode 32 and measurement electricity
Pole 33 etc..Specifically, as shown in Figure 2, material barrel 31 is for example made up in cube structure of insulating materials, and centre is provided with one
The cylindrical hole being sized, and solid phase sample to be tested is filled with inside it；At the top of material barrel 31, it is provided with multiple
The screw that (5 are shown as in Fig. 2) is equally spaced, these screws are respectively for insertion into measuring electrode.An in addition, left side for the material barrel
Right both sides have symmetrical multiple screws, corresponding through hole are provided with current electrode 32, so that two current electrodes
The both sides of material barrel are arranged on opposed to each other, and are inserted into solid phase sample each via laterally protruding structural member and are connected therewith
Touch.After by being for example the solid phase sample threading material barrel of rock sample, sealing ring, the structure of protrusion are put on two current electrodes
The upper surface insertion sample to be tested both ends of part (being preferably cylinder) contact.Then passed through with screw logical on current electrode
Corresponding screw and tightened on well insert barrel so that current electrode fully contacts with rock sample.For measuring electrode 33,
Its quantity is multiple and be inserted into solid phase sample contact therewith from the top of material barrel 31 respectively, is consequently formed multiple phases
Mutually keep being equally spaced between independent measurement point and all measuring electrodes.
According to a preferred embodiment of the present invention, as shown in Figure 3, the confession for directly influencing measurement result precision
For electrode, it is preferably designed in the present invention：Disk is intercepted remaining structure after following sub-fraction by straight line, and
And be not only provided with the side of the structure multiple through holes 322 be used to being embedded in screw it is combined with material barrel, and in central area
Domain is additionally provided with laterally projecting cylinder 321 to be adequately inserted to solid phase sample, correspondingly, is ensureing and solid phase sample
Between abundant contact while, also contribute to the reliability and accuracy of whole measurement process.
Data acquisition unit 4 is for example data acquisition card, and one end of the capture card is connected with the signal of CPU 5,
The other end is provided with multiple data acquisition channels, and these data acquisition channels and each measuring electrode 33 are corresponding one by one, thus
The measurement data of each measuring electrode is acquired simultaneously, and corresponding signal then is delivered into CPU.
CPU 5 is used to provide signal for producing different sine voltage signals to signal generating unit,
All signals from data acquisition unit 4 are received, stored and handled simultaneously, and then solid phase sample and current electrode is calculated
Between surface polarization effect value, correspondingly, the magnitude of voltage of each passage under different frequency can be read in this CPU,
Simultaneously including information such as testing time, apparent chargeabilities.For example, can be by the magnitude of voltage of above-mentioned five measured measuring electrodes, root
According to the geometric distance between each measuring electrode and current electrode, the voltage at whole sample medium both ends can be obtained by the method for extrapolation
Value.The difference that the magnitude of voltage of two current electrodes subtracts the magnitude of voltage of sample medium produces face voltage.
Below by using the certain kaolin of water content as test sample, current electrode made of steel material, steel material is made
Measuring electrode, and under the certain experiment condition of current density, illustrate the measurement and calculating of surface polarization.
Based on the surface polarization test system more than present patent application established, different frequencies can be collected by data acquisition card
Under rate, instantaneous value that current electrode both ends and five measuring electrode voltage change over time obtains voltage by calculation process
Amplitude.
Specifically, can be by standard pure resistance R0It is connected in whole circuit, passes through overall measurement system for demarcating
Electric current.It is A, B installed in material barrel both ends current electrode, current electrode and sample contacts resistance are respectively RS1、RS2。
The electrodes of A terminal voltage value measured under the conditions of Alternating Current Power Supply isB terminal voltage values are
As shown in Figure 4, all five measuring electrodes are from left to right named as the first measuring electrode, the second measurement successively
Electrode, the 3rd measuring electrode, the 4th measuring electrode and the 5th measuring electrode, wherein the magnitude of voltage gathered at the first measuring electrode isThe magnitude of voltage collected at 5th measuring electrode isIt is Z from the first measuring electrode to the impedance of right side current electrode1, from
The impedance of first measuring electrode to left side current electrode is Z3, the first measuring electrode to the impedance between the 5th measuring electrode is Z2。
In addition, it is by the electric current of whole series circuit
According to series circuit principle, formula (1), (2), (3), (4) can be obtained：
So as to derive (5), (6), (7)：
Wherein complex number voltageCollected by data acquisition card.
Total power plural currentIt can be tried to achieve by formula (1).
By formula (2), (3), (4) by multinomial plus and minus calculation, the first measuring electrode can be released to the 5th measuring electrode
Between, overall length is the impedance Z of 4d (i.e. the first measuring electrode to the spacing between the 5th measuring electrode) medium2.In addition, first
Measuring electrode is preferably configured to adjacent material barrel Edge Distance and the 5th measuring electrode to adjacent material barrel Edge Distance
For d/2.
Then for medium, formula (8) is obtained：
By Z1、Z3, bring formula (5) into, (7) can obtain RS1、RS2, i.e., the impedance on current electrode and medium contact interface.
Current electrode and the surface polarization rate on test sample contact interface：
Wherein, ηRsRepresent the surface polarization effect value between the solid phase sample and current electrode；Represent solid phase sample
Low-frequency resistance between current electrode, its unit are ohm；Represent the high-frequency electrical between solid phase sample and current electrode
Resistance, its unit is ohm；Correspondingly, high accuracy is able to, has quickly obtained and excites pole on current electrode and solid sample interface
Change effect-size.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (4)
- A kind of 1. system for being applied to surface polarization effect between test solid phase sample and current electrode, it is characterised in that the system Including signal generating unit (1), signal amplification unit (2), sample measurement unit (3), data acquisition unit (4) and central processing Unit (5), wherein：The signal generating unit (1) is used for the sine voltage signal for producing constant amplitude and frequency change, its one end and institute State CPU (5) signal to be connected, the other end, which is connected with the signal amplification unit (2) and exports sine voltage, to be believed Number；The signal amplification unit (2) is used to receive and amplify inputted sine voltage signal, and is converted into corresponding Sine-wave current signal continue to output；The sample measurement unit (3) includes material barrel (31), current electrode (32) and measuring electrode (33), the wherein material barrel (31) it is made up of insulating materials, and solid phase sample to be tested is filled with inside it；The current electrode (32) is opposed to each other Solid phase sample phase therewith is inserted into installed in the left and right sides of the material barrel (31), and each via laterally protruding structural member Contact；In addition, the signal amplification unit (2), current electrode (32) and solid phase sample together form loop, and the signal The sine-wave current signal of amplified signal output is loaded on the interface between the current electrode and the solid phase sample, and Effect of induced polarization is produced in alternating electric field；The quantity of the measuring electrode (33) is multiple, and they are respectively from the material barrel (31) it is inserted into solid phase sample and contacts therewith at the top of, and keep being equally spaced between all measuring electrodes, thus uses The relevant informations such as the magnitude of voltage on to solid phase sample between each measurement point and the current electrode (32) are measured in real time；One end of the data acquisition unit (4) is connected with the CPU (5) signal, and the other end is provided with more numbers According to acquisition channel, these data acquisition channels correspond with the measuring electrode, and for each measuring electrode Measurement data is acquired, and corresponding signal then is delivered into the CPU；The CPU is used to provide for producing different sine voltage signals to the signal generating unit (1) Signal, while receive, store and handle the signal from the data acquisition unit (4), so be calculated solid phase sample with Surface polarization effect value between current electrode.
- 2. the system as claimed in claim 1 for being applied to surface polarization effect between test solid phase sample and current electrode, it is special Sign is that the current electrode, measuring electrode are made up of Steel material.
- 3. the system as claimed in claim 1 or 2 for being applied to surface polarization effect between test solid phase sample and current electrode, its It is characterised by, the signal amplification unit is constant-current source.
- 4. the system as claimed in claim 3 for being applied to surface polarization effect between test solid phase sample and current electrode, it is special Sign is that the surface polarization effect value between the solid phase sample and current electrode is calculated according to below equation：<mrow> <msub> <mi>&eta;</mi> <mrow> <mi>R</mi> <mi>s</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mrow> <mi>S</mi> <mn>1</mn> <mo>,</mo> <msub> <mi>f</mi> <mrow> <mi>l</mi> <mi>o</mi> <mi>w</mi> </mrow> </msub> </mrow> </msub> <mo>-</mo> <msub> <mi>R</mi> <mrow> <mi>S</mi> <mn>1</mn> <mo>,</mo> <msub> <mi>f</mi> <mrow> <mi>h</mi> <mi>i</mi> <mi>g</mi> <mi>h</mi> </mrow> </msub> </mrow> </msub> </mrow> <msub> <mi>R</mi> <mrow> <mi>S</mi> <mn>1</mn> <mo>,</mo> <msub> <mi>f</mi> <mrow> <mi>l</mi> <mi>o</mi> <mi>w</mi> </mrow> </msub> </mrow> </msub> </mfrac> <mo>&times;</mo> <mn>100</mn> <mi>%</mi> </mrow>Wherein, ηRsRepresent the surface polarization effect value between the solid phase sample and current electrode；Represent solid phase sample with supplying Low-frequency resistance between electrode, its unit are ohm；The alternating-current resistance between solid phase sample and current electrode is represented, Its unit is ohm.
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009046350A1 (en) * | 2007-10-05 | 2009-04-09 | The Regents Of The University Of California | Detection of magnetic resonance signals using a magnetoresistive sensor |
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| US6119804A (en) * | 1999-05-13 | 2000-09-19 | Owen; Thomas E. | Horizontally polarized shear-wave vibrator seismic source |
| WO2000072031A1 (en) * | 1999-05-19 | 2000-11-30 | Nycomed Imaging As | Methods of magnetic resonance imaging (mri) using contract agent solutions formed from the dissolution of hyperpolarised materials |
| WO2010120783A1 (en) * | 2009-04-13 | 2010-10-21 | The Regents Of University Of California | Detection of j-coupling using atomic magnetometer |
| CN103176214A (en) * | 2011-12-20 | 2013-06-26 | 中国矿业大学(北京) | Electric field restraining method coal safety type fully-mechanized excavating onboard geological structure detection system and method thereof |
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Non-Patent Citations (1)
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| 煤巷含水地质构造双频激电探测阻容模拟试验;刘志民 等;《煤炭科学技术》;20150430;第43卷(第4期);第100-105页 * |
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