CN106501864A - The high density electric survey devices and methods therefor that polarizability is measured using metal electrode - Google Patents
The high density electric survey devices and methods therefor that polarizability is measured using metal electrode Download PDFInfo
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- CN106501864A CN106501864A CN201610983517.6A CN201610983517A CN106501864A CN 106501864 A CN106501864 A CN 106501864A CN 201610983517 A CN201610983517 A CN 201610983517A CN 106501864 A CN106501864 A CN 106501864A
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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 invention discloses a kind of utilization metal electrode measures the high density electric survey devices and methods therefor of polarizability, the measurement apparatus include electrical prospecting apparatus and HVDC electric supply installation, the HVDC electric supply installation includes that master controller, isolated drive circuit and H-bridge circuit, the electrical prospecting apparatus include metal electrode A, metal electrode B, metal electrode M and metal electrode N.Coordinated using HVDC electric supply installation and electrical prospecting apparatus, do not adopt unpolarizable electrode measurement polarizability, easy to operate, compared with traditional induced polarization method, high have the advantages that detection efficient；Compared with polarizability being measured with prior art using polarizing electrode, eliminate the error that current electrode produces polarity effect to geology, with higher accuracy, Effect on Detecting is good.It is applied to and earth resistivity and polarizability is explored.
Description
Technical field
A kind of the present invention relates to technical field of geophysical exploration, more particularly to the survey of utilization metal motor measurement polarizability
Amount device and measuring method.
Background technology
All there is potential difference in earth surface any two points, in the form of DC potential, referred to as natural potential.
Resistivity method in technical field of geophysical exploration is one kind of conducting electrical method exploitation method, and it is set up on ground
In shell between each rocks (ore) on the basis of conductive difference, by observing and studying the natural electric field relevant with this species diversity
Or the regularity of distribution of artificial electric field, can reach and find out geological structure or solve astronomical geology, engineering geology, environmental geology exploration neck
The problems such as Investigation of water resources, catalase situation and sewage area in domain.
Metal electrode is squeezed in soil in certain point, and positive and negative charge just adsorbs on the electrode of opposed polarity, over time
Passage, gradually accumulates and exists with electrode with polarization potential form, that is, produce polarization potential.
Traditional induced polarization method is that electrodes of A, B use metal electrode, measuring electrode M, N to use unpolarizable electrode, gold
Category electrode is exactly a copper rod, and unpolarizable electrode is a can-like structure, such as copper-copper sulphate (Cu-CuSO4) electrode, which is tied
Structure is by copper-bath device biscuiting porcelain jar, and little copper rod is inserted in copper-bath, by copper-bath and the earth
Contact, this polarization of electrode voltage are little, but obtain the about one hour stabilization time of less polarizing voltage, make in the wild
With very inconvenient, and it is long to explore the time.
At present, electrodes of A also adopted, B is metal electrode, measuring electrode M, N is the high density electricity of polarizing electrode
Method instrument.High-density electric instrument is once a lot of root electrodes of property cloth on a section, is automatically obtained by electrode conversion device multiple
Electrode combination serial is measured, the electrode arrangement rule of high-density electric instrument：(wherein A, B are current electrodes, and M, N are to survey for A, M, N, B
Amount electrode), as shown in Fig. 2 electrode spacing AM=MN=NB, as interval coefficient n is gradually increased to n (MAX) by n (MIN), four
Spacing between individual electrode is also uniformly pulled open, and general High Density Resistivity will add the direct current of several hectovolts between two electrode of A, B
High pressure, as in geology there is natural potential order of magnitude very little compared with current electrode in any two points, 2 points of measuring electrode M, N
Voltage Δ VMNOnly several millivolts are arrived hundreds of millivolt, are arranged when high-density electric instrument operationally completes A, B, M, a N electrode
After measurement, A, B, M, N electrode arrangement are moved to electrode conversion device the next measurement position of an electrode spacing successively, i.e.,
Corresponding A, M, N, B measuring point is distinguished with 1,2,3, No. 4 electrodes when measuring for the first time, distinguished with 2,3,4,5 electrodes during second measurement
Corresponding A, M, N, B measuring point, when being measured due to first time, No. 4 electrodes are corresponding current electrode B, and during second measurement, No. 4 electrodes are
Corresponding measuring electrode N, after first time measures, underground geologic bodies are affected to produce polarity effect by current electrode, and polarization body is powered
The electric charge of accumulation does not also have enough time to discharge (polarization is not completely eliminated in the short time), is changed into measuring electrode at short notice, this
Voltage Δ V of the individual electric charge for also not having enough time to discharge to measuring electrode measurement between M, NMNThere is very big interference.
Content of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of utilization metal electrode measures the height of polarizability
Density electrical survey device, can be while detection resistance rate and parameters of electrical induction polarizability.
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of utilization metal electrode measures the height of polarizability
Density electrical survey method, easy to operate, detection efficient is high, Effect on Detecting is good.
The technical solution adopted in the present invention is：A kind of high density electric survey dress of utilization metal electrode measurement polarizability
Put, including electrical prospecting apparatus and HVDC electric supply installation, the HVDC electric supply installation includes master controller, isolated drive circuit
And H-bridge circuit, the electrical prospecting apparatus includes metal electrode A, metal electrode B, metal electrode M and metal electrode N, the metal electrode
A and metal electrode B are current electrodes, and the metal electrode M and metal electrode N are measuring electrodes, and the first of the electrical prospecting apparatus is defeated
Go out end to be connected with the input of master controller, the output end of the master controller is connected with the input of isolated drive circuit, institute
State the output end of isolated drive circuit to be connected with the input of H-bridge circuit, the electrical prospecting apparatus is connected to gather metal with H-bridge circuit
Electric current between electrode M and metal electrode N, the H-bridge circuit include the first output end, the second output end, the H-bridge circuit
First output end is connected to provide supply voltage, the second output end of the H-bridge circuit to metal electrode A with metal electrode A
It is connected to provide supply voltage to metal electrode B with metal electrode B.
Further, the electrical prospecting apparatus is high-density electric instrument.
Further, the isolated drive circuit includes oscillating circuit, transformer and rectification filtering voltage stabilizing circuit, described shakes
Swing circuit to be connected with the master controller, the master controller is connected with the input of transformer by NAND gate series capacitance,
The output end of the transformer is connected with the input of rectification filtering voltage stabilizing circuit, the output end of the current rectifying and wave filtering circuit and H
The input connection of bridge circuit.
Further, the H-bridge circuit includes switching tube and surge voltage absorbing circuit, and the switching tube is IGBT pipes,
The output end of the current rectifying and wave filtering circuit is connected driving IGBT pipes, the output end of the IGBT pipes and institute with the input of IGBT pipes
The input connection of surge voltage absorbing circuit is stated, the IGBT pipes include the 9th IGBT pipes, the tenth IGBT pipes, the 11st IGBT
Pipe and the 12nd IGBT are managed, and the 9th IGBT pipe and the 12nd IGBT pipes constitute the first bridge arm, the tenth IGBT pipes and the
11 IGBT pipes constitute the second bridge arm.
Further, the H-bridge circuit also includes protecting filter circuit, the input connection electricity of the protection filter circuit
Source voltage, the output end of the protection filter circuit connect the second input of the surge voltage absorbing circuit.
Further, the IGBT casts number are IHW40T0120 pipes.
A kind of utilization metal electrode measures the high density electric survey method of polarizability, and methods described is applied to above-mentioned one
Plant the high density electric survey method that polarizability is measured using metal electrode, methods described includes step：
S1, the bottom surface that the metal electrode of measurement apparatus is squeezed into search coverage according to the distance that detection needs will with cable
Each electrode is coupled together with detection device；Each unit interval measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein
, used as current electrode, used as measuring electrode, AM=MN=NB is an electrode spacing, in pole for electrode M, electrode N for electrode A, electrode B
In a cycle of rate measurement, electrical prospecting apparatus control HVDC electric supply installation is powered to electrode A and electrode B；
S2, in one cycle, electrical prospecting apparatus control HVDC electric supply installation is positive to underground by electrode A and electrode B
The electric current I of power supply, electrical prospecting apparatus measuring electrode A and electrode B power circuitAB, voltage Δ V between measuring electrode M and electrode N；
S3, measures electric current IABAfter voltage Δ V, electrical prospecting apparatus control HVDC electric supply installation is stopped power supply, and electrical prospecting apparatus is surveyed
Voltage between amount electrode A and electrode B, if the voltage between electrode A and electrode B is not zero, electrical prospecting apparatus control HVDC is supplied
Electric installation exports a voltage swing backward voltage equal, in opposite direction between electrode A and electrode B, to underground geologic bodies
Carry out reverse polarization so that the voltage between electrode A and electrode B is progressively smaller until to be zero；Electrical prospecting apparatus controls four electrodes and moves
An electrode spacing is moved, is entered and is measured next time, return to step S2.
The invention has the beneficial effects as follows：
A kind of high density electric survey device of utilization metal electrode measurement polarizability using HVDC electric supply installation and
Electrical prospecting apparatus coordinates, and does not adopt unpolarizable electrode measurement polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
Compare, high have the advantages that detection efficient；Compared with polarizability being measured with prior art using polarizing electrode, eliminate current electrode pair
Geology produces the error of polarity effect, and with higher accuracy, Effect on Detecting is good.
The present invention another beneficial effect be：
A kind of high density electric survey method of utilization metal electrode measurement polarizability using HVDC electric supply installation and
Electrical prospecting apparatus coordinates, and does not adopt unpolarizable electrode measurement polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
Compare, high have the advantages that detection efficient；Compared with polarizability being measured with prior art using polarizing electrode, eliminate current electrode pair
Geology produces the error of polarity effect, and with higher accuracy, Effect on Detecting is good.
Description of the drawings
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further：
Fig. 1 is time-domain induced polarization charge and discharge electrical schematic；
Fig. 2 is the Wenner arrangement schematic diagram in High Density Resistivity；
Fig. 3 is high-density electric instrument connection HVDC electric supply installation module diagram of the present invention；
Fig. 4 is isolated drive circuit figure of the present invention；
Fig. 5 is H-bridge circuit figure of the present invention；
Fig. 6 is HVDC electric supply installation output high-voltage dc voltage oscillogram of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combine.
The measuring principle of polarizability：
Fig. 1 is time-domain induced polarization charge and discharge electrical schematic, as shown in figure 1, high-density electric instrument will by current electrode
Electric current feeds underground, the potential difference change of subsurface rock, ore is observed using measuring electrode, it is assumed that underground medium is equal
Even non-polarized medium, then, when supply current is constant, the potential difference that measuring electrode is measured is Δ V1If underground has one and polarizes
Body, then when electric current is propagated in underground medium and flows through the polarization body, there is electrochemical reaction in polarization body, and polarization body is stimulated and produces
Raw " secondary current ", and then produce additional " secondary electrical field " Δ V2, potential difference is produced between measuring electrode, is switched in current electrode
When not disconnecting, the potential difference that measuring electrode is measured is Δ V1With Δ V2Sum, referred to as potential difference of total field.Current electrode is now disconnected
Switch, supply current hour, and the polarization of underground polarization body is still present, polarization body will discharge to reply former poised state,
This process needs the regular hour, the T in such as Fig. 1Put, usually use ηsAs a parameter to this is special to describe medium induced polarization
Property, which is defined as:
Wherein Δ V2(toff) secondary electric potential that measures for a certain moment after power-off is poor, Δ V1+ΔV2=Δ V is survey before power-off
The potential difference of total field for obtaining, ηsIt is with respect to physical quantity, dimensionless.
High-density electric instrument polarizing electrode Measure section resistivity principle：
Fig. 2 is the Wenner arrangement schematic diagram in High Density Resistivity, as shown in Fig. 2 once cloth is very on a section
Many electrodes, are automatically obtained multiple electrode combination serial metering systems by electrode conversion device, as shown in Fig. 2 60 roads by such as 60
Electrode arrangement rule is：A, M, N, B, (wherein A, B are current electrodes, and M, N are measuring electrodes), electrode spacing AM=MN=NB,
Space-number is n, and as space-number n (MIN) is gradually increased to n (MAX), the spacing between four electrodes is also uniformly pulled open.Such as Fig. 2
Shown, Measure section is inverted trapezoidal, if electrode sum is 60, n (MIN)=1, n (MAX)=16, first, n=n (MIN)=1,
As electrode has 4, so measurement data is 57：
The first step：A=1#, M=2#, N=3#, B=4#；
Second step：A=2#, M=3#, N=4#, B=5#；
……
57th step：A=57#, M=58#, N=59#, B=60#；
Then, n=n+1, measurement data are 54：
The first step：A=1#, M=3#, N=5#, B=7#；
Second step：A=2#, M=4#, N=6#, B=8#；
……
54th step：A=54#, M=56#, N=58#, B=60#；
……
Finally, n=n (MAX)=16, measurement data are 12：
The first step：A=1#, M=17#, N=33#, B=49#；
Second step：A=2#, M=18#, N=34#, B=60#；
……
12nd step：A=12#, M=28#, N=44#, B=60#.
Obviously, measurement data number=(60-n × 3) of corresponding each layer of position (n), if n=1 to n=16,16 layers
All measurement obtains a complete section for position, and data count should be 552.This ginseng for being arranged in measurement induced polarization method
Number polarizability ηs, for the first time measurement is that A, B are current electrodes, corresponding to 1 with 1,2,3, No. 4 electrodes, corresponding A, M, N, B measuring point
Number, No. 4 electrodes, M, N are measuring electrodes, corresponding to No. 2, No. 3 electrodes.Measurement next time is 2,3,4, No. 5 electrodes, and A, B are to supply
Electrode, corresponding to No. 2, No. 5 electrodes；M, N are measuring electrodes, corresponding to No. 3, No. 4 electrodes；The rest may be inferred, general high density
Resistivity method will add the high direct voltage of several hectovolts in two electrode of A, B, and measure the voltage Δ V of 2 points of M, NMNOnly several millivolts
Hundreds of millivolt is arrived, after High Density Resistivity operationally completes the measurement of 1,2,3, No. 4 electrode arrangements, will after 1 second
With 2,3,4, No. 5 electrode corresponding As, M, N, B measuring points, A, B are current electrodes, and M, N are measuring electrodes, and No. 4 electrodes are to supply for the first time
Electrode B, No. 4 electrodes of second measurement are changed into measuring electrode N, and after No. 4 electrodes are measured for the first time, current electrode B is over the ground
Plastid produces polarity effect, and underground geologic bodies (i.e. polarization body) also do not have enough time to discharge due to the electric charge of power supply accumulation, general 1 second
It is changed into measuring electrode after clock, voltage Δ V of the electric charge not discharged to measuring electrode measurement between M, NMNThere is very big interference.
Fig. 3 is high-density electric instrument connection HVDC electric supply installation schematic diagram of the present invention, as shown in figure 3, a kind of utilize
Metal electrode measures the high density electric survey device of polarizability, including electrical prospecting apparatus and HVDC electric supply installation, the present embodiment
It is preferred that adopting high-density electric instrument.The HVDC electric supply installation includes master controller, isolated drive circuit and H-bridge circuit,
The master controller includes single-chip microcomputer, and the electrical prospecting apparatus includes metal electrode A, metal electrode B, metal electrode M and metal electrode
N, the metal electrode A and metal electrode B is current electrode, and the metal electrode M and metal electrode N are measuring electrodes, described
First output end of electrical prospecting apparatus is connected with the input of master controller, the output end of the master controller and isolated drive circuit
Input connects, and the output end of the isolated drive circuit is connected with the input of H-bridge circuit, the electrical prospecting apparatus and H-bridge circuit
To gather the electric current between metal electrode M and metal electrode N, the H-bridge circuit includes the first output end, the second output for connection
End, the first output end of the H-bridge circuit are connected to provide supply voltage, the H bridges to metal electrode A with metal electrode A
Second output end of circuit is connected to provide supply voltage to metal electrode B with metal electrode B.
Fig. 4 is isolated drive circuit figure of the present invention, and Fig. 5 is H-bridge circuit figure of the present invention, in conjunction with Fig. 4 and Fig. 5, isolation drive
Circuit includes that oscillating circuit 1, transformer and rectification filtering voltage stabilizing circuit 2, the oscillating circuit 1 are connected with the master controller,
The oscillating circuit 1 includes NAND gate U1B, NAND gate U1C, resistance R6, resistance R7 and electric capacity C7, and the first of NAND gate U1B is defeated
Enter the protection drive signal PROTECT_nQ that end receives master controller output, the output end of NAND gate U1B connects NAND gate respectively
Two inputs of U1C, the output end of NAND gate U1C are connected to the second of NAND gate U1B by series capacitance C7 and resistance R6
Input, the output end of NAND gate U1B are connected to the node between electric capacity C7 and resistance R6 also by resistance R7.NAND gate U1C
The oscillator signal OSC of one 18KHz of output.The oscillator signal that the present embodiment is preferably produced using oscillating circuit, it is also possible to pass through
The adjustable square-wave signal of single-chip microcomputer output pulse width in master controller, the isolated drive circuit also include NAND gate
U4A, NAND gate U4B, the first input end of NAND gate U4A receive the oscillator signal OSC of NAND gate U1C output, NAND gate U4B
First input end receives the oscillator signal OSC of NAND gate U1C output, and the second input reception master controller of NAND gate U4A is defeated
The the first direct current signal PDRV for going out, the second input of NAND gate U4B receive the second direct current signal NDRV of master controller output,
The output end of NAND gate U4A is become respectively by electric capacity C1, electric capacity C3 connection transformer TR1, the first input end of transformer TR2
Depressor TR1, second input of transformer TR2 are all connected with power supply ground, and the output end of NAND gate U4B passes through electric capacity respectively
C5, electric capacity C8 connection transformer TR3, the first input end of transformer TR4, transformer TR3, second input of transformer TR4
It is all connected with power supply ground.H-bridge circuit includes switching tube and surge voltage absorbing circuit, and the switching tube is IGBT pipes, including the 9th
IGBT pipe U9, the tenth IGBT pipe U10, the 11st IGBT pipes U11 and the 12nd IGBT pipe U12, rectification filtering voltage stabilizing circuit 2 include
Diode D1 to D8, electric capacity C2, C4, C6, C9, first output end of resistance R1 to R8, transformer TR1 is by connecting diode D1
The G ends that the 9th IGBT pipe U9 are connected to resistance R1 provide drive signal DRV_G1, the second output end connection the of transformer TR1
The E ends of nine IGBT pipe U9 provide the negative pole and the 9th that drive signal DRV_E1, electric capacity C2 and resistance R2 are connected in parallel on diode D1
Between the E ends of IGBT pipe U9, the positive pole of diode D2 connects the G that the E ends of the 9th IGBT pipe U9, negative pole connect the 9th IGBT pipe U9
End；First output end of transformer TR2 is connected to the G ends of the tenth IGBT pipe U10 and provides by connecting diode D3 and resistance R3
Second output end of drive signal DRV_G2, transformer TR2 connects the E ends of the tenth IGBT pipe U10 and provides drive signal DRV_E2,
Electric capacity C4 and resistance R4 are connected in parallel between the E ends of the negative pole of diode D3 and the tenth IGBT pipe U10, the positive pole connection of diode D4
The E ends of the tenth IGBT pipe U10, negative pole connect the G ends of the tenth IGBT pipe U10；First output end of transformer TR3 is by connection two
Pole pipe D5 and resistance R5 are connected to the G ends of the 11st IGBT pipe U11 and provide drive signal DRV_G3, and the second of transformer TR3 is defeated
E ends offer the drive signal DRV_E3, electric capacity C6 and resistance R8 for going out the 11st IGBT pipe U11 of end connection is connected in parallel on diode D5's
Between the E ends of negative pole and the 11st IGBT pipe U11, the positive pole of diode D6 connects the E ends of the 11st IGBT pipe U11, negative pole and connects
Connect the G ends of the 11st IGBT pipe U11；First output end of transformer TR4 is connected to the by connecting diode D7 and resistance R9
The G ends of 12 IGBT pipe U12 provide drive signal DRV_G4, and second output end of transformer TR4 connects the 12nd IGBT pipe U12
E ends drive signal DRV_E4, electric capacity C9 and resistance R10 be provided be connected in parallel on the negative pole and the 12nd IGBT pipe U12 of diode D7
E ends between, the positive pole of diode D8 connects the G that the E ends of the 12nd IGBT pipe U12, negative pole connect the 12nd IGBT pipe U12
End.
Due to general IGBT pipes driving voltage be 7V, in the present embodiment design driving voltage be 10V, NAND gate U1B,
U1C produces ac voltage signal, and respectively by main controller controls by NAND gate U4A, U4B is coupled to transformer TR1 to TR4
In, the ac voltage signal of output 20V or so after transformer boost by 2 output amplitude of rectification filtering voltage stabilizing circuit is
The square wave of 10V, and then drive the 9th IGBT pipes IGBT pipe U12 of U9 to the 12nd.As shown in figure 5, one bridge arm of H-bridge circuit is by
Nine IGBT pipes and the 12nd IGBT pipes are constituted, and another bridge arm is made up of the tenth IGBT pipes and the 11st IGBT pipes, the present embodiment
Using the model of IGBT pipes be IHW40T0120.H-bridge circuit includes surge voltage absorbing circuit 3 and protection filter circuit 4, protects
Shield filter circuit includes diode D9, piezo-resistance R17, electric capacity C12 to C14, resistance R16, R18, surge voltage absorbing circuit 3
Including piezo-resistance R22, R23, R27, R28, diode D10 to D17, resistance R20, R21, R25, R26 and electric capacity C15 to C18,
Main frame in high-density electric instrument provides H-bridge circuit supply voltage, and supply voltage positive pole HV+ connects the positive pole of diode D9, pressure
Quick resistance R17, electric capacity C12, electric capacity C13, electric capacity C14 are connected in parallel between the negative pole of diode D9 and supply voltage negative pole HV-, are protected
Diode D9 in shield filter circuit plays unilateal conduction or so, prevents H-bridge circuit because of supply voltage reverse-connection damage circuit.Diode
The negative pole of D9 is connected to supply voltage negative pole HV- also by resistance R16, resistance R18.The negative pole of diode D9 passes through piezo-resistance
R19 connects the C-terminal of supply voltage negative pole HV-, the C-terminal of the 9th IGBT pipes and the tenth IGBT pipes and is all connected with second source voltage HVB
+, the E ends of the 9th IGBT pipes and C-terminal series connection piezo-resistance R22, the C-terminal of the 9th IGBT pipes pass through diode D11, diode D13
The E ends of the 9th IGBT pipes and the C-terminal of the 11st IGBT pipes is connected to electric capacity C15, and resistance R21 connects the positive pole of diode D11
Negative pole with diode D13；The E ends of the tenth IGBT pipes and C-terminal series connection piezo-resistance R23, the C-terminal of the tenth IGBT pipes pass through two poles
Pipe D10, diode D12 and electric capacity C12 are connected to the E ends of the tenth IGBT pipes and the C-terminal of the 12nd IGBT pipes, and resistance R20 connects
The positive pole of diode D10 and the negative pole of diode D12；The E ends of the 11st IGBT pipes and C-terminal series connection piezo-resistance R27, the 11st
The C-terminal of IGBT pipes is connected to E ends and the supply voltage of the 11st IGBT pipes by diode D15, diode D17 and electric capacity C17
The negative pole of the positive pole and diode D17 of negative pole HV-, resistance R26 connection diode D15；The E ends of the tenth IGBT pipes and C-terminal series connection
Piezo-resistance R23, the C-terminal of the 12nd IGBT pipes are connected to the 12nd IGBT by diode D14, diode D16 and electric capacity C18
The negative pole of the positive pole and diode D16 of the E ends of pipe and supply voltage negative pole HV-, resistance R25 connection diode D14.In electric capacity
Node between the positive pole of C15 and diode D15 is connected to the metal electrode B of high-density electric instrument, in electric capacity C16 and diode
Node between the positive pole of D14 is connected to the metal electrode A of high-density electric instrument by connecting resistance R24, for exporting forward direction
(wherein, metal electrode A and metal electrode B are power supplies to metal electrode A and metal electrode B for supply voltage and reverse power supply voltage
Electrode).The electric current I that high-density electric instrument can be tested between metal electrode A and metal electrode B at resistance R24 two endsAB.
Fig. 4 is HVDC electric supply installation output high-voltage dc voltage oscillogram of the present invention, in the present embodiment master controller
The preferred MSP430F169 single-chip microcomputers of single-chip microcomputer, high-density electric instrument control HVDC electric supply installation change power-on time, power-off
Time and supply voltage, as shown in figure 4, in power-on time T1, high-density electric instrument control high voltage direct current pressure device output
Forward dc high pressure V1, when power is off between in T2, high direct voltage value zero, in power-on time T3, exports reverse high direct voltage V2.
When needing to carry out multi-electrode resistivity imaging survey in the wild, n root electrodes are squeezed on a cable according to actual needs,
Numbering is 1 to n, and HVDC electric supply installation is powered to underground by electrodes of A and current electrode B, measuring electrode M and measurement
Electrode N is connected to high-density electric instrument M, N input by measuring cable, carries out first time measurement, and high-density electric instrument is controlled
When HVDC electric supply installation provides forward dc high pressure, between high-density electric instrument collection electrodes of A and current electrode B
Electric current IABAnd the voltage Δ V between measuring electrode M and measuring electrode N, after having measured, high-density electric instrument controls high straightening
Stream electric supply installation is stopped power supply, the electric current I between high-density electric instrument collection electrodes of A and current electrode BAB, judge power supply
Whether the voltage between electrode A and current electrode B is zero, if the voltage between A, B is not zero, high-density electric instrument control is high
Pressure DC power supply apparatus provide a backward voltage, carry out reverse polarization to underground geologic bodies, until the voltage between A, B is
Zero.
A kind of high density electric survey device of utilization metal electrode measurement polarizability using HVDC electric supply installation and
Electrical prospecting apparatus coordinates, and does not adopt unpolarizable electrode measurement polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
Compare, high have the advantages that detection efficient；Compared with polarizability being measured with prior art using polarizing electrode, eliminate current electrode pair
Geology produces the error of polarity effect, and with higher accuracy, Effect on Detecting is good.
A kind of high density electric survey method of utilization metal electrode measurement polarizability is applied to above-mentioned one kind and utilizes metal
The high density electric survey device of electrode measurement polarizability, measuring method step are as follows：
S1, the bottom surface that the metal electrode of measurement apparatus is squeezed into search coverage according to the distance that detection needs will with cable
Each electrode is coupled together with detection device；Each unit interval measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein
, used as current electrode, used as measuring electrode, AM=MN=NB is an electrode spacing, in pole for electrode M, electrode N for electrode A, electrode B
In a cycle of rate measurement, electrical prospecting apparatus control HVDC electric supply installation is powered to electrode A and electrode B；
S2, in one cycle, electrical prospecting apparatus control HVDC electric supply installation is positive to underground by electrode A and electrode B
Power supply, in power-on time T1, the electric current I of electrical prospecting apparatus measuring electrode A and electrode B power circuitAB, measuring electrode M and electrode N it
Between voltage Δ V；
S3, measures electric current IABAfter voltage Δ V, electrical prospecting apparatus control HVDC electric supply installation is stopped power supply, when power is off
Between in T2, voltage between electrical prospecting apparatus measuring electrode A and electrode B, if the voltage between electrode A and electrode B is not zero, electrical prospecting apparatus
Control HVDC electric supply installation exports a voltage swing reverse electricity equal, in opposite direction between electrode A and electrode B
Underground geologic bodies are carried out reverse polarization so that the voltage between electrode A and electrode B is progressively smaller until to be zero by pressure；Electrical prospecting apparatus
Four electrodes of control move an electrode spacing, enter and measure next time, return to step S2.
It is more than that the preferable enforcement of the present invention is illustrated, but the invention is not limited to the enforcement
Example, those of ordinary skill in the art without prejudice to spirit of the invention on the premise of can also made a variety of equivalent variations or replaced
Change, the deformation of these equivalents or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of utilization metal electrode measures the high density electric survey device of polarizability, it is characterised in which includes electrical prospecting apparatus
With HVDC electric supply installation, the HVDC electric supply installation includes master controller, isolated drive circuit and H-bridge circuit, institute
Stating electrical prospecting apparatus includes metal electrode A, metal electrode B, metal electrode M and metal electrode N, the metal electrode A and metal electrode B
It is current electrode, the metal electrode M and metal electrode N are measuring electrodes, the first output end of the electrical prospecting apparatus and main control
The input connection of device, the output end of the master controller are connected with the input of isolated drive circuit, the isolation drive electricity
The output end on road is connected with the input of H-bridge circuit, and the electrical prospecting apparatus is connected to gather metal electrode M and metal with H-bridge circuit
Electric current between electrode N, the H-bridge circuit include the first output end, the second output end, the first output end of the H-bridge circuit
It is connected to provide supply voltage, the second output end of the H-bridge circuit and metal electrode B to metal electrode A with metal electrode A
It is connected to provide supply voltage to metal electrode B.
2. a kind of utilization metal electrode according to claim 1 measures the high density electric survey device of polarizability, and which is special
Levy and be, the electrical prospecting apparatus is high-density electric instrument.
3. a kind of utilization metal electrode according to claim 1 measures the high density electric survey device of polarizability, and which is special
Levy and be, the isolated drive circuit includes oscillating circuit, transformer and rectification filtering voltage stabilizing circuit, the oscillating circuit and institute
Master controller connection is stated, the master controller is connected with the input of transformer by NAND gate series capacitance, the transformer
Output end be connected with the input of rectification filtering voltage stabilizing circuit, the output end of the current rectifying and wave filtering circuit is defeated with H-bridge circuit
Enter end connection.
4. a kind of utilization metal electrode according to claim 1 measures the high density electric survey device of polarizability, and which is special
Levy and be, the H-bridge circuit includes switching tube and surge voltage absorbing circuit, the switching tube is IGBT pipes, the rectification filter
The output end of wave circuit is connected driving IGBT pipes, the output end of the IGBT pipes and the surge voltage with the input of IGBT pipes
The first input end connection of absorbing circuit, IGBT pipe include that the 9th IGBT pipes, the tenth IGBT pipes, the 11st IGBT are managed and the
12 IGBT are managed, and the 9th IGBT pipes constitute the first bridge arm, the tenth IGBT pipes and the 11st with the 12nd IGBT pipes
IGBT pipes constitute the second bridge arm.
5. a kind of utilization metal electrode according to claim 4 measures the high density electric survey device of polarizability, and which is special
Levy and be, the H-bridge circuit also includes protecting filter circuit, the input connection supply voltage of the protection filter circuit, institute
The output end for stating protection filter circuit connects the second input of the surge voltage absorbing circuit.
6. a kind of utilization metal electrode according to claim 4 measures the high density electric survey device of polarizability, and which is special
Levy and be, the IGBT casts number are IHW40T0120 pipes.
7. a kind of utilization metal electrode measures the high density electric survey method of polarizability, it is characterised in that methods described application
In the high density electric survey device that a kind of utilization metal electrode as described in any one of claim 1 to 6 measures polarizability, institute
The method of stating includes step：
The metal electrode of measurement apparatus is squeezed into the bottom surface of search coverage according to the distance that detection needs by S1, with cable by each
Electrode is coupled together with detection device；Each unit interval measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein electrode
, used as current electrode, used as measuring electrode, AM=MN=NB is an electrode spacing, surveys in polarizability for electrode M, electrode N for A, electrode B
In a cycle of amount, electrical prospecting apparatus control HVDC electric supply installation is powered to electrode A and electrode B；
S2, in one cycle, electrical prospecting apparatus control HVDC electric supply installation is powered to underground is positive by electrode A and electrode B,
The electric current I of electrical prospecting apparatus measuring electrode A and electrode B power circuitAB, voltage Δ V between measuring electrode M and electrode N；
S3, measures electric current IABAfter voltage Δ V, electrical prospecting apparatus control HVDC electric supply installation is stopped power supply, electrical prospecting apparatus measurement electricity
Voltage between pole A and electrode B, if the voltage between electrode A and electrode B is not zero, electrical prospecting apparatus control HVDC supplies Denso
One voltage swing backward voltage equal, in opposite direction between electrode A and electrode B of output is put, underground geologic bodies are carried out
Reverse polarization so that the voltage between electrode A and electrode B is progressively smaller until to be zero；Electrical prospecting apparatus controls four electrode movements one
Individual electrode spacing, enters and measures next time, return to step S2.
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| CN111413738B (en) * | 2020-04-26 | 2021-06-11 | 山东大学 | Time domain induced polarization spectrum analysis method and system for porous medium |
| CN111913046A (en) * | 2020-05-27 | 2020-11-10 | 哈尔滨理工大学 | Principle for measuring steady-state relaxation polarizability of insulating dielectric medium based on polarization current time domain spectrum |
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| CN117270062A (en) * | 2023-11-22 | 2023-12-22 | 山东大学 | TBM induced polarization advanced water detection device and method based on annular electrode emission |
| CN117270062B (en) * | 2023-11-22 | 2024-02-09 | 山东大学 | TBM induced polarization advanced water detection device and method based on annular electrode emission |
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