CN106501864B - Utilize the high density electric survey devices and methods therefor of metal electrode measurement polarizability - Google Patents
Utilize the high density electric survey devices and methods therefor of metal electrode measurement polarizability Download PDFInfo
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- CN106501864B CN106501864B CN201610983517.6A CN201610983517A CN106501864B CN 106501864 B CN106501864 B CN 106501864B CN 201610983517 A CN201610983517 A CN 201610983517A CN 106501864 B CN106501864 B CN 106501864B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields
Abstract
The invention discloses a kind of high density electric survey devices and methods therefors using metal electrode measurement polarizability, the measuring device includes electrical prospecting apparatus and high voltage direct current power supply unit, the high voltage direct current power supply unit includes master controller, isolated drive circuit and H-bridge circuit, and the electrical prospecting apparatus includes metal electrode A, metal electrode B, metal electrode M and metal electrode N.Cooperated using high voltage direct current power supply unit and electrical prospecting apparatus, unpolarizable electrode is not used to measure polarizability, it is easy to operate, compared with traditional induced polarization method, have the advantages that detection efficient is high；Compared with the prior art is using polarizing electrode measurement polarizability, the error that current electrode generates polarity effect to geology is eliminated, there is higher accuracy, Effect on Detecting is good.Suitable for earth resistivity and polarizability exploration.
Description
Technical field
The present invention relates to technical field of geophysical exploration more particularly to a kind of surveys using metal motor measurement polarizability
Measure device and measurement method.
Background technique
All there is potential difference in earth surface any two points, exist 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, it is established on ground
In shell between each rocks (ore) on the basis of conductive difference, by observing and studying natural electric field related with this species diversity
Or the regularity of distribution of artificial electric field, it can reach and find out geological structure or the astronomical geology of solution, 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 into soil in certain point, and positive and negative charge just adsorbs on the electrode of opposed polarity, with the time
Passage gradually accumulates in the form of polarization potential and exists on electrode, that is, generates polarization potential.
Traditional induced polarization method is electrodes of A, B using metal electrode, and measuring electrode M, N uses unpolarizable electrode, gold
Belonging to electrode is exactly a copper rod, and unpolarizable electrode is a can-like structure, such as copper-copper sulphate (Cu-CuSO4) electrode, knot
Structure is that small copper rod is inserted into copper-bath, passes through copper-bath and the earth by copper-bath device biscuiting porcelain jar
Contact, this polarization of electrode voltage is little, but the stabilization time for obtaining smaller polarizing voltage is about one hour, is made in field
With very inconvenient, and it is long to explore the time.
Currently, also have using electrodes of A, it is the high density electricity of polarizing electrode that B, which is metal electrode, measuring electrode M, N,
Method instrument.High-density electric instrument is many root electrodes of primary property cloth on a section, is realized automatically by electrode conversion device a variety of
Electrode combination serially measures, the electrode arrangement rule of high-density electric instrument: A, (wherein A, B are current electrodes, and M, N are to survey by M, N, B
Measure 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 a 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, due in geology any two points there are the natural potential order of magnitude very little compared with current electrode, measuring electrode M, N two o'clock
Voltage Δ VMNOnly several millivolts are arrived several hundred millivolts, are completed an A, B, M, N electrode at work when high-density electric instrument and are arranged
After measurement, A, B, M, N electrode arrangement are successively moved to next measurement position an of electrode spacing by electrode conversion device, i.e.,
A, M, N, B measuring point are respectively corresponded with 1,2,3, No. 4 electrode when measuring for the first time, is distinguished when measuring for the second time with 2,3,4,5 electrodes
Corresponding A, M, N, B measuring point, since No. 4 electrodes are corresponding current electrode B when first time measures, No. 4 electrodes are when measuring for the second time
Corresponding measuring electrode N, underground geologic bodies are influenced to generate polarity effect, polarization body power supply by current electrode after first time measures
The charge of accumulation does not have enough time also discharging and (not completely eliminating polarization in the short time), becomes measuring electrode in a short time, this
A charge for not having enough time also discharging is to the voltage Δ V between measuring electrode measurement M, NMNIn the presence of very big interference.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of height using metal electrode measurement polarizability
Density electrical survey device, energy while detection resistance rate and parameters of electrical induction polarizability.
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of height using metal electrode measurement polarizability
Density electrical survey method, easy to operate, detection efficient is high, Effect on Detecting is good.
The technical scheme adopted by the invention is that: a kind of high density electric survey dress using metal electrode measurement polarizability
It sets, including electrical prospecting apparatus and high voltage direct current power supply unit, the high voltage direct current power supply unit includes 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, the metal electrode
A and metal electrode B is current electrode, and the metal electrode M and metal electrode N are measuring electrodes, and the first of the electrical prospecting apparatus is defeated
The connection of the input terminal of outlet and master controller, the output end of the master controller and the input terminal of isolated drive circuit connect, institute
The input terminal of the output end and H-bridge circuit of stating isolated drive circuit connects, and the electrical prospecting apparatus is connect to acquire metal with H-bridge circuit
Electric current between electrode M and metal electrode N, the H-bridge circuit include the first output end, second output terminal, the H-bridge circuit
First output end is connect for providing supply voltage, the second output terminal of the H-bridge circuit to metal electrode A with metal electrode A
It is connect with metal electrode B for providing supply voltage to 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, the vibration
Circuit is swung to connect with the master controller, the master controller is connected by the input terminal of NAND gate series capacitance and transformer,
The output end of the transformer and the input terminal of rectification filtering voltage stabilizing circuit connect, the output end and H of the current rectifying and wave filtering circuit
The input terminal of bridge circuit connects.
Further, the H-bridge circuit includes switching tube and surge voltage absorbing circuit, and the switching tube is IGBT pipe,
The output end of the current rectifying and wave filtering circuit connect driving IGBT pipe, the output end of the IGBT pipe and institute with the input terminal of IGBT pipe
The input terminal connection of surge voltage absorbing circuit is stated, the IGBT pipe includes the 9th IGBT pipe, the tenth IGBT pipe, the 11st IGBT
Pipe and the 12nd IGBT pipe, the 9th IGBT pipe form the first bridge arm, the tenth IGBT Guan Yu with the 12nd IGBT pipe
11 IGBT pipes form the second bridge arm.
Further, the H-bridge circuit further includes protection filter circuit, and the input terminal of the protection filter circuit connects electricity
The output end of source voltage, the protection filter circuit connects the second input terminal of the surge voltage absorbing circuit.
Further, the IGBT cast number is IHW40T0120 pipe.
A kind of high density electric survey method using metal electrode measurement polarizability, the method are applied to above-mentioned one
Kind measures the high density electric survey method of polarizability using metal electrode, the method includes the steps:
The metal electrode of measuring device is squeezed into the bottom surface of search coverage by S1 according to the distance that detection needs, will with cable
Each electrode is connected with detection device；Each unit time measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein
Electrode A, electrode B are as current electrode, and electrode M, electrode N are as measuring electrode, and AM=MN=NB is an electrode spacing, in pole
In a cycle of rate measurement, electrical prospecting apparatus controls high voltage direct current power supply unit and powers to electrode A and electrode B；
S2, in one cycle, it is positive to underground by electrode A and electrode B that electrical prospecting apparatus controls high voltage direct current power supply unit
Power supply, 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 controls high voltage direct current power supply unit and stops power supply, and electrical prospecting apparatus is surveyed
The voltage between electrode A and electrode B is measured, if the voltage between electrode A and electrode B is not zero, electrical prospecting apparatus controls high voltage direct current and supplies
Electric installation exports an equal, contrary backward voltage of voltage swing between electrode A and electrode B, to underground geologic bodies
Reverse polarization is carried out, so that it is zero that the voltage between electrode A and electrode B, which is progressively smaller until,；Electrical prospecting apparatus controls four electrodes and moves
Move an electrode spacing, into measuring next time, return step S2.
The beneficial effects of the present invention are:
A kind of high density electric survey device using metal electrode measurement polarizability using high voltage direct current power supply unit and
Electrical prospecting apparatus cooperation does not use unpolarizable electrode to measure polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
It compares, has the advantages that detection efficient is high；Compared with the prior art is using polarizing electrode measurement polarizability, current electrode pair is eliminated
Geology generates the error of polarity effect, has higher accuracy, and Effect on Detecting is good.
Another beneficial effect of the invention is:
A kind of high density electric survey method using metal electrode measurement polarizability using high voltage direct current power supply unit and
Electrical prospecting apparatus cooperation does not use unpolarizable electrode to measure polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
It compares, has the advantages that detection efficient is high；Compared with the prior art is using polarizing electrode measurement polarizability, current electrode pair is eliminated
Geology generates the error of polarity effect, has higher accuracy, and Effect on Detecting is good.
Detailed description of the invention
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
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 high voltage direct current power supply unit 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 high voltage direct current power supply unit output high-voltage dc voltage waveform diagram of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
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, is observed using measuring electrode to the potential difference variation of subsurface rock, ore, it is assumed that underground medium is equal
Even non-polarized medium, then when supply current is constant, the potential difference that measuring electrode measures is Δ V1If there are a polarization for underground
Body, then electric current is propagated in underground medium when flowing through the polarization body, and electrochemical reaction occurs for polarization body, and polarization body is stimulated and produces
Raw " secondary current ", and then generate additional " secondary electrical field " Δ V2, potential difference is generated between measuring electrode, is switched in current electrode
When not disconnecting, the potential difference that measuring electrode measures is Δ V1With Δ V2The sum of, referred to as potential difference of total field.Current electrode is disconnected at this time
Switch, supply current hour, and the polarization of underground polarization body still remains, polarization body will discharge to reply former equilibrium state,
This process needs the regular hour, T as shown in figure 1It puts, usually use ηsAs a parameter to this spy of description medium induced polarization
Property, is defined as:
Wherein Δ V2(toff) it is that the secondary electric potential that a certain moment measures after powering off is poor, Δ V1+ΔV2=Δ V is survey before power-off
The potential difference of total field obtained, ηsIt is opposite 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, primary cloth is very on a section
More electrodes, such as 60, the serial measurement method of a variety of electrode combinations are realized by electrode conversion device, as shown in Fig. 2, 60 automatically
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, firstly, n=n (MIN)=1,
Since electrode shares 4, so measurement data is 57:
Step 1: A=1#, M=2#, N=3#, B=4#；
Step 2: 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:
Step 1: A=1#, M=3#, N=5#, B=7#；
Step 2: 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 is 12:
Step 1: A=1#, M=17#, N=33#, B=49#；
Step 2: A=2#, M=18#, N=34#, B=60#；
……
Step 12: 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, measurement is with 1,2,3, No. 4 electrode for the first time, and corresponding A, M, N, B measuring point, A, B are current electrodes, corresponding to 1
Number, No. 4 electrodes, M, N are measuring electrodes, correspond to No. 2, No. 3 electrodes.Measurement next time is 2,3,4, No. 5 electrodes, and A, B are to supply
Electrode corresponds to No. 2, No. 5 electrodes；M, N is measuring electrode, corresponds 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 M, N two o'clockMNOnly several millivolts
It will after 1 second after High Density Resistivity completes the measurement of 1,2,3, No. 4 electrode arrangement at work to several hundred millivolts
With 2,3,4, No. 5 electrode corresponding As, M, N, B measuring point, 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 of measurement become measuring electrode N, and after No. 4 electrodes measure for the first time, current electrode B is over the ground
Plastid generates polarity effect, and underground geologic bodies (i.e. polarization body) are not since the charge of power supply accumulation has enough time also discharging, and general 1 second
Become measuring electrode after clock, the charge not discharged is to the voltage Δ V between measuring electrode measurement M, NMNIn the presence of very big interference.
Fig. 3 is high-density electric instrument connection high voltage direct current power supply unit schematic diagram of the present invention, as shown in figure 3, a kind of utilization
Metal electrode measures the high density electric survey device of polarizability, including electrical prospecting apparatus and high voltage direct current power supply unit, the present embodiment
It is preferred that using high-density electric instrument.The high voltage direct current power supply unit includes master controller, isolated drive circuit and H-bridge circuit,
The master controller includes single-chip microcontroller, 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 are current electrodes, and the metal electrode M and metal electrode N are measuring electrodes, described
The input terminal of first output end of electrical prospecting apparatus and master controller connects, the output end of the master controller and isolated drive circuit
Input terminal connection, the output end of the isolated drive circuit and the input terminal of H-bridge circuit connect, the electrical prospecting apparatus and H-bridge circuit
To acquire 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 connect for providing supply voltage, the H bridge to metal electrode A with metal electrode A
The second output terminal of circuit is connect for providing 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 oscillating circuit 1, transformer and rectification filtering voltage stabilizing circuit 2, and the oscillating circuit 1 is connect with the master controller,
The oscillating circuit 1 includes NAND gate U1B, NAND gate U1C, resistance R6, resistance R7 and capacitor C7, and the first of NAND gate U1B is defeated
Enter the protection driving signal PROTECT_nQ that end receives master controller output, the output end of NAND gate U1B is separately connected NAND gate
Two input terminals 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 terminal, the output end of NAND gate U1B also pass through the node that resistance R7 is connected between capacitor C7 and resistance R6.NAND gate U1C
Export the oscillator signal OSC of a 18KHz.The oscillator signal that the present embodiment preferably uses oscillating circuit to generate, can also pass through
The adjustable square-wave signal of single-chip microcontroller output pulse width in master controller, the isolated drive circuit further includes 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's
First input end receives the oscillator signal OSC of NAND gate U1C output, and it is defeated that the second input terminal of NAND gate U4A receives master controller
The second input terminal of the first direct current signal PDRV out, NAND gate U4B receive the second direct current signal NDRV of master controller output,
The output end of NAND gate U4A passes through the first input end of capacitor C1, capacitor C3 connection transformer TR1, transformer TR2 respectively, becomes
Depressor TR1, transformer TR2 the second input terminal be all connected with power ground, the output end of the NAND gate U4B passes through capacitor respectively
The first input end of C5, capacitor C8 connection transformer TR3, transformer TR4, the second input terminal of transformer TR3, transformer TR4
It is all connected with power ground.H-bridge circuit includes switching tube and surge voltage absorbing circuit, and the switching tube is IGBT pipe, including the 9th
IGBT pipe U9, the tenth IGBT pipe U10, the 11st IGBT pipe U11 and the 12nd IGBT pipe U12, rectification filtering voltage stabilizing circuit 2 include
The first output end of diode D1 to D8, capacitor C2, C4, C6, C9, resistance R1 to R8, transformer TR1 pass through connection diode D1
Driving signal DRV_G1, the second output terminal connection the of transformer TR1 are provided with the end G for being connected to the 9th IGBT pipe U9 resistance R1
The end E of nine IGBT pipe U9 provides driving signal DRV_E1, capacitor C2 and resistance the R2 cathode and the 9th for being connected in parallel on diode D1
Between the end E of IGBT pipe U9, the end E of the 9th IGBT pipe U9 of anode connection of diode D2, cathode connect the G of the 9th IGBT pipe U9
End；The end G that the first output end of transformer TR2 is connected to the tenth IGBT pipe U10 by connecting diode D3 and resistance R3 provides
The end E that the second output terminal of driving signal DRV_G2, transformer TR2 connect the tenth IGBT pipe U10 provides driving signal DRV_E2,
Capacitor C4 and resistance R4 is connected in parallel between the cathode of diode D3 and the end E of the tenth IGBT pipe U10, the anode connection of diode D4
The end E of tenth IGBT pipe U10, cathode connect the end G of the tenth IGBT pipe U10；The first output end of transformer TR3 passes through connection two
The end G that pole pipe D5 and resistance R5 is connected to the 11st IGBT pipe U11 provides driving signal DRV_G3, and the second of transformer TR3 is defeated
The end E that outlet connects the 11st IGBT pipe U11 provides driving signal DRV_E3, capacitor C6 and resistance R8 and is connected in parallel on diode D5's
Between cathode and the end E of the 11st IGBT pipe U11, the end E of the 11st IGBT pipe U11 of anode connection of diode D6, cathode connect
Connect the end G of the 11st IGBT pipe U11；The first output end of transformer TR4 is connected to the by connecting diode D7 and resistance R9
The end G of 12 IGBT pipe U12 provides driving signal DRV_G4, and the second output terminal of transformer TR4 connects the 12nd IGBT pipe U12
The end E driving signal DRV_E4, capacitor C9 and resistance R10 are provided are connected in parallel on the cathode and the 12nd IGBT pipe U12 of diode D7
The end E between, the anode connection end E of the 12nd IGBT pipe U12 of diode D8, cathode connect the G of the 12nd IGBT pipe U12
End.
Since the driving voltage of general IGBT pipe is 7V, the driving voltage designed in the present embodiment is 10V, NAND gate U1B,
U1C generates ac voltage signal, is coupled to transformer TR1 to TR4 by NAND gate U4A, U4B by main controller controls respectively
In, the ac voltage signal of 20V or so is exported after transformer boosts, and is by 2 output amplitude of rectification filtering voltage stabilizing circuit
The square wave of 10V, and then drive the 9th IGBT pipe U9 to the 12nd IGBT pipe U12.As shown in figure 5, one bridge arm of H-bridge circuit is by
Nine IGBT pipe and the 12nd IGBT pipe composition, another bridge arm are made of the tenth IGBT pipe and the 11st IGBT pipe, the present embodiment
The model of the IGBT pipe of use is IHW40T0120.H-bridge circuit includes surge voltage absorbing circuit 3 and protection filter circuit 4, is protected
Protecting filter circuit includes diode D9, varistor R17, capacitor C12 to C14, resistance R16, R18, surge voltage absorbing circuit 3
Including varistor R22, R23, R27, R28, diode D10 to D17, resistance R20, R21, R25, R26 and capacitor C15 to C18,
Host in high-density electric instrument provides H-bridge circuit supply voltage, the anode of supply voltage anode HV+ connection diode D9, pressure
Quick resistance R17, capacitor C12, capacitor C13, capacitor C14 are connected in parallel between the cathode of diode D9 and supply voltage cathode HV-, are protected
The diode D9 protected in filter circuit plays unilateal conduction or so, prevents H-bridge circuit because of supply voltage reverse-connection damage circuit.Diode
The cathode of D9 also passes through resistance R16, resistance R18 is connected to supply voltage cathode HV-.The cathode of diode D9 passes through varistor
R19 connection supply voltage cathode HV-, the C-terminal of the 9th IGBT pipe and the C-terminal of the tenth IGBT pipe are all connected with second source voltage HVB
+, the end E of the 9th IGBT pipe and C-terminal series connection varistor R22, the C-terminal of the 9th IGBT pipe pass through diode D11, diode D13
The end E of the 9th IGBT pipe and the C-terminal of the 11st IGBT pipe, the anode of resistance R21 connection diode D11 are connected to capacitor C15
With the cathode of diode D13；The end E of tenth IGBT pipe and C-terminal series connection varistor R23, the C-terminal of the tenth IGBT pipe pass through two poles
Pipe D10, diode D12 and capacitor C12 are connected to the end E of the tenth IGBT pipe and the C-terminal of the 12nd IGBT pipe, resistance R20 connection
The anode of diode D10 and the cathode of diode D12；The end E of 11st IGBT pipe and C-terminal are connected varistor R27, and the 11st
The C-terminal of IGBT pipe is connected to the end E and the supply voltage of the 11st IGBT pipe by diode D15, diode D17 and capacitor C17
The anode of cathode HV-, resistance R26 connection diode D15 and the cathode of diode D17；The end E of tenth IGBT pipe and C-terminal series connection
The C-terminal of varistor R23, the 12nd IGBT pipe are connected to the 12nd IGBT by diode D14, diode D16 and capacitor C18
The end E of pipe and supply voltage cathode HV-, the anode of resistance R25 connection diode D14 and the cathode of diode D16.In capacitor
Node between C15 and the anode of diode D15 is connected to the metal electrode B of high-density electric instrument, in capacitor C16 and diode
The metal electrode A that node between the anode of D14 is connected to high-density electric instrument by connecting resistance R24, for exporting forward direction
(wherein, metal electrode A and metal electrode B is power supply to metal electrode A and metal electrode B for supply voltage and reverse power supply voltage
Electrode).High-density electric instrument can test the electric current I between metal electrode A and metal electrode B at the both ends resistance R24AB。
Fig. 4 is high voltage direct current power supply unit of the present invention output high-voltage dc voltage waveform diagram, in the present embodiment master controller
The preferred MSP430F169 single-chip microcontroller of single-chip microcontroller, high-density electric instrument control high voltage direct current power supply unit and change power-on time, power-off
Time and supply voltage, as shown in figure 4, high-density electric instrument controls the output of high voltage direct current pressure device in power-on time T1
Forward dc high pressure V1, when power is off between in T2, high direct voltage value zero exports reversed high direct voltage V2 in power-on time T3.
It is out of office it is outer n root electrode is squeezed on a cable according to actual needs when needing to carry out multi-electrode resistivity imaging survey,
Number is 1 to n, and high voltage direct current power supply unit is powered by electrodes of A and current electrode B to underground, measuring electrode M and measurement
Electrode N is connected to high-density electric instrument M, N input terminal by measurement cable, carries out first time measurement, high-density electric instrument control
When high voltage direct current power supply unit provides forward dc high pressure, high-density electric instrument is acquired between electrodes of A and current electrode B
Electric current IABAnd the voltage Δ V between measuring electrode M and measuring electrode N, high-density electric instrument controls high straightening after having measured
It flows power supply unit and stops power supply, high-density electric instrument acquires the electric current I between electrodes of A and current electrode BAB, judge to power
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
It presses DC power supply apparatus to provide a backward voltage, reverse polarization is carried out to underground geologic bodies, until the voltage between A, B is
Zero.
A kind of high density electric survey device using metal electrode measurement polarizability using high voltage direct current power supply unit and
Electrical prospecting apparatus cooperation does not use unpolarizable electrode to measure polarizability, easy to operate, measures polarizability with conventionally employed unpolarizable electrode
It compares, has the advantages that detection efficient is high；Compared with the prior art is using polarizing electrode measurement polarizability, current electrode pair is eliminated
Geology generates the error of polarity effect, has higher accuracy, and Effect on Detecting is good.
It is a kind of using metal electrode measurement polarizability high density electric survey method be applied to it is above-mentioned it is a kind of utilize metal
The high density electric survey device of electrode measurement polarizability, steps are as follows for measurement method:
The metal electrode of measuring device is squeezed into the bottom surface of search coverage by S1 according to the distance that detection needs, will with cable
Each electrode is connected with detection device；Each unit time measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein
Electrode A, electrode B are as current electrode, and electrode M, electrode N are as measuring electrode, and AM=MN=NB is an electrode spacing, in pole
In a cycle of rate measurement, electrical prospecting apparatus controls high voltage direct current power supply unit and powers to electrode A and electrode B；
S2, in one cycle, it is positive to underground by electrode A and electrode B that electrical prospecting apparatus controls high voltage direct current power supply unit
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 controls high voltage direct current power supply unit and stops power supply, when power is off
Between in T2, the 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
It controls high voltage direct current power supply unit and exports an equal, contrary reversed electricity of voltage swing between electrode A and electrode B
Pressure carries out reverse polarization to underground geologic bodies, so that it is zero that the voltage between electrode A and electrode B, which is progressively smaller until,；Electrical prospecting apparatus
Four electrode movements, one electrode spacing is controlled, into measuring next time, return step S2.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (6)
1. a kind of high density electric survey device using metal electrode measurement polarizability, which is characterized in that it includes electrical prospecting apparatus
With high voltage direct current power supply unit, the high voltage direct current power supply unit 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 terminal of device connects, and the output end of the master controller and the input terminal of isolated drive circuit connect, the isolation drive electricity
The output end on road and the input terminal of H-bridge circuit connect, and the isolated drive circuit includes oscillating circuit, transformer and rectifying and wave-filtering
Voltage regulator circuit, the oscillating circuit are connect with the master controller, and the master controller passes through NAND gate series capacitance and transformation
The input terminal of device connects, and the output end of the transformer and the input terminal of rectification filtering voltage stabilizing circuit connect, the rectifying and wave-filtering
The output end of voltage regulator circuit and the input terminal of H-bridge circuit connect, and the electrical prospecting apparatus is connect to acquire metal electrode M with H-bridge circuit
Electric current between metal electrode N, the H-bridge circuit include the first output end, second output terminal, the first of the H-bridge circuit
Output end is connect for providing supply voltage, the second output terminal and gold of the H-bridge circuit to metal electrode A with metal electrode A
Belong to electrode B connection for providing supply voltage to metal electrode B.
2. a kind of high density electric survey device using metal electrode measurement polarizability according to claim 1, special
Sign is that the electrical prospecting apparatus is high-density electric instrument.
3. a kind of high density electric survey device using metal electrode measurement polarizability according to claim 1, special
Sign is that the H-bridge circuit includes switching tube and surge voltage absorbing circuit, and the switching tube is IGBT pipe, the rectification filter
The output end of wave voltage regulator circuit connect driving IGBT pipe, the output end and the surge of the IGBT pipe with the input terminal of IGBT pipe
The first input end of voltage absorpting circuit connects, and the IGBT pipe includes the 9th IGBT pipe, the tenth IGBT pipe, the 11st IGBT pipe
It is managed with the 12nd IGBT, the 9th IGBT pipe forms the first bridge arm, the tenth IGBT pipe and the tenth with the 12nd IGBT pipe
One IGBT pipe forms the second bridge arm.
4. a kind of high density electric survey device using metal electrode measurement polarizability according to claim 3, special
Sign is that the H-bridge circuit further includes protection filter circuit, and the input terminal of the protection filter circuit connects supply voltage, institute
The output end for stating protection filter circuit connects the second input terminal of the surge voltage absorbing circuit.
5. a kind of high density electric survey device using metal electrode measurement polarizability according to claim 3, special
Sign is that the IGBT cast number is IHW40T0120 pipe.
6. a kind of high density electric survey method using metal electrode measurement polarizability, which is characterized in that the method application
In a kind of high density electric survey device using metal electrode measurement polarizability such as described in any one of claim 1 to 5, institute
State method comprising steps of
The metal electrode of measuring device is squeezed into the bottom surface of search coverage by S1 according to the distance that detection needs, will be each with cable
Electrode is connected with detection device；Each unit time measurement is participated in by four electrodes, is followed successively by A, M, N, B, wherein electrode
A, electrode B is as current electrode, and electrode M, electrode N are as measuring electrode, and AM=MN=NB is an electrode spacing, in polarizability
In a cycle of measurement, electrical prospecting apparatus controls high voltage direct current power supply unit and powers to electrode A and electrode B；
S2, in one cycle, electrical prospecting apparatus control high voltage direct current power supply unit and are powered by electrode A and electrode B to underground forward direction,
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 controls high voltage direct current power supply unit and stops 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 controls high voltage direct current for Denso
One equal, contrary backward voltage of voltage swing between electrode A and electrode B of output is set, underground geologic bodies are carried out
Reverse polarization, so that it is zero that the voltage between electrode A and electrode B, which is progressively smaller until,；Electrical prospecting apparatus controls four electrode movements one
A electrode spacing, into measuring next time, return step S2.
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| CN107725045B (en) * | 2017-09-27 | 2021-08-31 | 中国石油天然气集团公司 | Multi-polar polarizability combined logging instrument and logging method thereof |
| CN108508491B (en) * | 2018-05-03 | 2019-11-08 | 湖南师范大学 | A kind of ultra high density electrical method electrode planing method for eliminating polarity effect interference |
| CN110263985B (en) * | 2019-06-04 | 2021-05-04 | 长江勘测规划设计研究有限责任公司 | Electric method monitoring and early warning system for water permeation of water delivery culvert, dike and side slope water body |
| CN110276484B (en) * | 2019-06-04 | 2021-05-04 | 长江勘测规划设计研究有限责任公司 | Electric method monitoring and early warning system for water permeation of water delivery culvert, dike and side slope water body |
| CN112083368A (en) * | 2019-06-12 | 2020-12-15 | 中国船舶重工集团公司第七六研究所 | Self-noise test method of measuring electrode based on compensation mode |
| CN111413738B (en) * | 2020-04-26 | 2021-06-11 | 山东大学 | Time domain induced polarization spectrum analysis method and system for porous medium |
| CN111913046B (en) * | 2020-05-27 | 2022-09-27 | 哈尔滨理工大学 | Method for measuring steady-state relaxation polarizability of insulating dielectric |
| CN111693570B (en) * | 2020-06-17 | 2023-02-21 | 上海应用技术大学 | Device for measuring polarizability of reinforcing steel bar based on four-polarization method |
| CN114063171A (en) * | 2021-11-04 | 2022-02-18 | 中国地质大学（武汉） | Rock stratum karst cave nondestructive detection system and detection method |
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