CN108227004B - A kind of high density alternating current-direct current swashs electric system and its working method - Google Patents
A kind of high density alternating current-direct current swashs electric system and its working method Download PDFInfo
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- CN108227004B CN108227004B CN201810004346.7A CN201810004346A CN108227004B CN 108227004 B CN108227004 B CN 108227004B CN 201810004346 A CN201810004346 A CN 201810004346A CN 108227004 B CN108227004 B CN 108227004B
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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
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
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Abstract
The present invention relates to a kind of high density alternating current-direct currents to swash electric system and its working method, belongs to geophysical instrument field.The system includes measurement host, multi-electrode converter, receives cable, firing cable, receiving electrode, emission electrode and patchcord；Multi-electrode converter includes 4 interfaces.The present invention is kept completely separate using reception cable with firing cable, receiving electrode and emission electrode are fully separating, solve the problems, such as that transmitting and reception cable Solution of Electromagnetic Field Penetration Problems and receiving electrode signal drift are big, the reception electric wire of the transmitting electric wire and low pressure that avoid high pressure simultaneously is too close, the high-voltage breakdown as caused by transmitting electric wire electric leakage etc., damages instrument；Compared with unseparated cable, emission current can be significantly improved.Measuring system can carry out efficient, anti-interference strong exchange induced polarization measurement, can also carry out conventional DC lasering electric measurement, hence it is evident that improve measurement efficiency, have important practical value.
Description
Technical field
The invention belongs to geophysical instrument field, it is related to a kind of high density alternating current-direct current and swashs electric system and its work side
Method.
Background technique
High density electrical survey is to be simutaneously arranged multiple electrodes, by electrode conversion device, is combined into specified electrode
Device, and then realize multi-electrode away from the apparent resistivity and apparent chargeability, apparent rate of frequency spread, view phase on multiple measuring points of observation section
Position observation, the double properties with resistivity profiling and resistivity sounding.The characteristics of high-density electric is that measurement points are more,
Informative.Induced polarization method is divided into alternating current induced polarization method (referred to as exchange and swash electricity) according to the characteristics of signal and direct current excites
Polarization method (abbreviation DC lasering electric).
High density current drive measuring system is the measuring instrument for realizing high density electrical survey.What is had currently on the market is highly dense
Spend swash electric system by centralization, tandem type, it is distributed in the form of embody, these instruments can only do DC lasering electric measurement, and direct current is sharp
Electric energy intuitively measures secondary field, but the time spent is very long.Exchange, which swashs electricity, to be had anti-interference strong, and equipment is light, measurement ginseng
Number is more, and time of measuring is short, but is influenced by electromagnetic coupling serious, therefore this method runs pole application extensively as artificial, still
It is not applied to high density current drive measuring system well.
The electrode converter of above-mentioned measuring system realizes series control by a multicore cable, this root cable is reception
Signal, transmitting signal and control signal mix, and exist due to receiving with transmitting electromagnetic coupling, especially inductive coupling side
Formula, so that received signal includes not only the conducted signal for measuring the earth, there are also the coupled signals of firing cable.
In addition reception and emission electrode are used as the same electrode by above-mentioned most of measuring system, when previous electrode points are made
The electrode charge that can make the earth remaining bigger after being measured for emission electrode, progress next point measurement immediately, which is used as, at this time connects
When receiving electrode, the signal of signal meeting overlay electrode charge electric discharge is received, causes receiving electrode signal drift big, measured result
Have very big measurement error.Some instruments use time-delay method, after allowing the electrode electricity to discharge, then measure, in this way can be into one
Step increases time of measuring, seriously reduces measurement efficiency.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of high density alternating current-direct currents to swash electric system and its working method, solution
Certainly transmitting with receive cable Solution of Electromagnetic Field Penetration Problems and the big problem of receiving electrode signal drift, can carry out efficient, anti-interference strong
Induced polarization measurement is exchanged, conventional DC lasering electric measurement can also be carried out.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of high density alternating current-direct current swashs electric system, the system include measurement host, multi-electrode converter, receive cable,
Firing cable, receiving electrode, emission electrode and patchcord；
The multi-electrode converter includes 4 interfaces, is AB1, AB2, MN1, MN2, wherein AB2 and transmitting respectively
Cable forms a unit, and MN2 and a piece-root grafting receive cable and form a unit, and AB1 and MN1 are respectively the stem of each unit, hair
Ray cable and reception cable are respectively the tail portion of each unit；It connects between unit and unit, measurement host passes through patchcord 1 and list
The stem of member is connected, and is connected by patchcord 2 with the tail portion of unit；
Every cable of each unit includes k tap, and each tap connects an electrode, receives cable and firing cable
It separates.
Further, the firing cable is multicore cable, including k+2 root signal wire, is A, B and k root tap line respectively, often
A tap connects an emission electrode, wherein A and B multiple twin；
The reception cable is multicore cable, including 2 pairs of control lines and k+2 root signal wire, and 2 pairs of control lines are power supply respectively
+, power supply-, communication+, communication-, M, N and k root tap line, each tap connects a receiving electrode, wherein power supply+with power supply-,
Communication+and communication-, M and N distinguish multiple twin.
Further, the multi-electrode converter is by switch buck module, RS485 converter 1, RS485 converter 2, micro-
Controller, relay array 1, relay array 2 and relay driver composition, switch buck module is by the direct current on cable
Power supply is reduced to 5V voltage for driving relay, is that microcontroller and series bus controller are powered, microcontroller passes through I/O port
Control the switch of relay array 1 and relay array 2；Relay array 1 realizes that M or N is selectivelyed switch on and receives tap 1-
K, relay array 2 realize that A or B selectivelyes switch on transmitting tap 1-k.
Further, the receiving electrode is copper electrode or unpolarizable electrode；Emission electrode is copper electrode or stainless steel electrode.
Further, the measurement host is made of transmitting module, receiving module, control module and supplementary module；
The transmitting module generates high voltage and constant current and emits signal, by H bridge, H bridge driver, over-voltage over-current protection circuit and electricity
Flow sample circuit composition；
Receiving module emission current signal, MN voltage signal；Emission current acquisition unit is by being galvanically isolated amplifier, low
Bandpass filter, programming amplifying and AD are cascaded；MN voltage measurement unit is by impedance matching circuit, low-pass filter, program-controlled
Amplification and AD are cascaded；
Control module controls the control core of AD conversion and H bridge transmitting synchronous sequence, human-computer interaction and electrode boxcar, by
FPGA, microcontroller, man-machine interface and USB interface composition；Wherein man-machine interface includes keyboard and liquid crystal；
Supplementary module generates high-voltage DC power supply and serial communication signals, gives each electrode connection box distributed power supply and transmission
Instruction, while various constant voltage sources are generated, it powers for each functional module, specifically includes electric power management circuit, booster circuit and string
Row converter；The voltage of lithium battery is risen to 30-150V by booster circuit, reduces the resistance loss on cable using high-voltage transmission.
Working method based on the system, comprising the following steps:
S1: after measuring device to be measured deploys, system electrification, host sends coded command, compiles to each unit
Code；
S2: according to the working method of setting, host successively sends the switching control order of A, B, M, N electrode；
S3: host emits HT waveform, is powered by A, B electrode to the earth, and synchronous recording MN electrode, emission current
Value；
S4: carrying out FFT transform and calculating to MN electrode voltage and emission current, obtains apparent resistivity, view phase, view phase
Difference, apparent rate of frequency spread and apparent chargeability parameter.
The beneficial effects of the present invention are: the present invention using receive cable and firing cable be kept completely separate, receiving electrode with
Emission electrode is fully separating, solves the problems, such as that transmitting and reception cable Solution of Electromagnetic Field Penetration Problems and receiving electrode signal drift are big, simultaneously
The reception electric wire of the transmitting electric wire and low pressure that avoid high pressure is too close, the high-voltage breakdown as caused by transmitting electric wire electric leakage etc., damage
Bad instrument；Compared with unseparated cable, emission current can be significantly improved.Measuring system can carry out efficient, anti-interference strong
Exchange induced polarization measurement, conventional DC lasering electric measurement can also be carried out, hence it is evident that improve measurement efficiency, there is important practical valence
Value.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is instrument connection schematic diagram；
Fig. 2 is concatenation unit schematic illustration；
Fig. 3 is connection figure inside host.
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
A kind of high density alternating current-direct current, which swashs electric system, to be by measurement host, multi-electrode converter, receives cable, transmitting electricity
Cable, receiving electrode, emission electrode and patchcord are constituted.
Multi-electrode converter includes 4 interfaces, is AB1, AB2, MN1, MN2 respectively as shown in the figure, and wherein AB2 and one
Firing cable, MN2 and a piece-root grafting receive cable and form a unit, and AB1 and MN1 are the stem of unit, emit cable and receive electricity
Cable is the tail portion of unit.It can connect between unit and unit, measurement host is connected by patchcord 1 with the stem of unit, is led to
Patchcord 2 is crossed to be connected with the tail portion of unit.With reference to Fig. 1.
Every cable of each unit includes k tap (our actual product k is 4 or 10), each tap connection one
A electrode,.Cable is received to separate with firing cable.
Firing cable is multicore cable, including k+2 root signal wire, is A, B and k root tap line respectively, each tap connection
One emission electrode, wherein A and B multiple twin.
Receiving cable to be is also multicore cable, including 2 pairs of control lines and k+2 root signal wire, and 2 pairs of control lines are power supply respectively
+, power supply-, communication+, communication-, M, N and k root tap line, each tap connects a receiving electrode, wherein power supply+with power supply-,
Communication+and communication-, M and N distinguish multiple twin.With reference to Fig. 2.
Multi-electrode converter be by switch buck module, RS485 converter 1, RS485 converter 2, microcontroller, after
Electric appliance array 1, relay array 2 and relay driver composition, switch buck module is to be reduced to the DC power supply on cable
5V voltage is that microcontroller and series bus controller are powered, microcontroller controls relay by I/O port for driving relay
The switch of device array 1 and relay array 2.Relay array 1 realizes that M or N is selectivelyed switch on and receives tap 1-k, relay
Array 2 realizes that A or B selectivelyes switch on transmitting tap 1-k.With reference to Fig. 2.
Receiving electrode is copper electrode or unpolarizable electrode.
Emission electrode is copper electrode or stainless steel electrode.
Host is made of transmitting module, receiving module, control module and supplementary module.With reference to Fig. 3.
Transmitting module generates high voltage and constant current and emits signal, including H bridge, H bridge driver, over-voltage over-current protection circuit and electric current
Sample circuit composition.
Receiving module emission current signal, MN voltage signal；Emission current acquisition unit is by being galvanically isolated amplifier, low
Bandpass filter, programming amplifying and AD are cascaded；MN voltage measurement unit is by impedance matching circuit, low-pass filter, program-controlled
Amplification and AD are cascaded.
Control module controls the control core of AD conversion and H bridge transmitting synchronous sequence, human-computer interaction and electrode boxcar, is
It is made of FPGA, microcontroller, man-machine interface and USB interface；Man-machine interface includes keyboard and liquid crystal.
Supplementary module generates high-voltage DC power supply and serial communication signals, gives each electrode connection box distributed power supply and transmission
Instruction, while various constant voltage sources are generated, it powers for each functional module, specifically includes electric power management circuit, booster circuit and string
Row converter.Booster circuit is the voltage of lithium battery to be risen to 30-150V, reduces the resistance on cable using high-voltage transmission in this way
Loss.
The course of work of instrument is:
1. after measuring device to be measured deploys, system electrification, host sends coded command, each unit is compiled
Code.
2. according to the working method that instrument is set, host successively sends the switching control order of A, B, M, N electrode.
3. host emits HT waveform, powered by A, B electrode to the earth, and synchronous recording MN electrode, emission current
Value.
4. pair MN electrode voltage and emission current carry out FFT transform and calculating, apparent resistivity, view phase, view phase are obtained
Difference, apparent rate of frequency spread, apparent chargeability parameter.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (7)
1. a kind of high density alternating current-direct current swashs electric system, it is characterised in that: the system include measurement host, multi-electrode converter,
Receive cable, firing cable, receiving electrode, emission electrode and patchcord；
The multi-electrode converter includes 4 interfaces, is AB1, AB2, MN1, MN2 respectively, wherein AB2 and firing cable
A first unit is formed, MN2 and a piece-root grafting receive cable and form a second unit, and AB1 is the stem of first unit, and MN1 is
The stem of second unit, firing cable and reception cable are respectively the tail portion of each unit；It connects between each first unit, each second
It connects between unit, measurement host is connected with the tail portion of the tail portion of first unit, second unit simultaneously by patchcord 1, is passed through
Patchcord 2 is connected with the stem of first unit, the stem of second unit simultaneously；
The firing cable is multicore cable, including k+2 root signal wire, is A, B and k root tap line respectively, each tap connection
One emission electrode；The reception cable is multicore cable, including 2 pairs of control lines and k+2 root signal wire, 2 pairs of control line difference
Be power supply+, power supply-, communication+, communication-, wherein k+2 root signal wire includes M, N and k root tap line, and each tap connects one
Receiving electrode；
Every cable of each unit includes k tap, and each tap connects an electrode, receives cable and firing cable point
It opens.
2. a kind of high density alternating current-direct current according to claim 1 swashs electric system, it is characterised in that: wherein A and B multiple twin；Its
Middle power supply+and power supply-, communication+is with communication-, M and N difference multiple twin.
3. a kind of high density alternating current-direct current according to claim 1 swashs electric system, it is characterised in that: the multi-electrode conversion
Device by switch buck module, RS485 converter 1, RS485 converter 2, microcontroller, relay array 1, relay array 2 and
Relay driver composition, switch buck module is that the DC power supply on cable is reduced to 5V voltage to be used to drive relay, is
Microcontroller and series bus controller power supply, microcontroller are opened by I/O port control relay array 1 and relay array 2
It closes；Relay array 1 realizes that M or N is selectivelyed switch on and receives 1~k of tap, and relay array 2 realizes that A or B selectively connects
Logical transmitting 1~k of tap.
4. a kind of high density alternating current-direct current according to claim 1 swashs electric system, it is characterised in that: the receiving electrode is copper
Electrode or unpolarizable electrode；Emission electrode is copper electrode or stainless steel electrode.
5. a kind of high density alternating current-direct current according to claim 1 swashs electric system, it is characterised in that: the measurement host is by sending out
Penetrate module, receiving module, control module and supplementary module composition；
The transmitting module generates high voltage and constant current and emits signal, is adopted by H bridge, H bridge driver, over-voltage over-current protection circuit and electric current
Sample circuit composition；
Receiving module emission current signal, MN voltage signal, including emission current acquisition unit and MN voltage measurement unit；Its
In, emission current acquisition unit is by being galvanically isolated amplifier, the first low-pass filter, the first programming amplifying and the first AD cascade
It forms；MN voltage measurement unit be by impedance matching circuit, the second low-pass filter, the second programming amplifying and the 2nd AD cascade and
At；
Control module control AD conversion, H bridge transmitting synchronous sequence, human-computer interaction and electrode boxcar control core, by FPGA,
Microcontroller, man-machine interface and USB interface composition；
Supplementary module generates high-voltage DC power supply and serial communication signals, refers to each electrode connection box distributed power supply and transmission
It enables, while generating various constant voltage sources, power for each functional module, specifically include electric power management circuit, booster circuit and serial
Converter；The voltage of lithium battery is risen to 30-150V by booster circuit, reduces the resistance loss on cable using high-voltage transmission.
6. a kind of high density alternating current-direct current according to claim 5 swashs electric system, it is characterised in that: the man-machine interface includes
Keyboard and liquid crystal.
7. the working method based on any one of the claim 1-6 system, it is characterised in that: method includes the following steps:
S1: after measuring device to be measured deploys, system electrification, host sends coded command, encodes to each unit；
S2: according to the working method of setting, host successively sends the switching control order of A, B, M, N electrode；
S3: host emits HT waveform, is powered by A, B electrode to the earth, and synchronous recording MN electrode voltage, emission current
Value；
S4: carrying out FFT transform and calculating to MN electrode voltage and emission current, obtain apparent resistivity, view phase, view phase difference,
Apparent rate of frequency spread and apparent chargeability parameter.
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| JP2001021662A (en) * | 1999-07-07 | 2001-01-26 | Agency Of Ind Science & Technol | Electrode switching device for electrical prospecting |
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| CN1108391A (en) * | 1994-03-03 | 1995-09-13 | 地质矿产部机械电子研究所 | Large power, electrically metering, computer controlling multi-electrode converter |
| JP2001021662A (en) * | 1999-07-07 | 2001-01-26 | Agency Of Ind Science & Technol | Electrode switching device for electrical prospecting |
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