CN106932825A - Swash the method and instrument of the electricity timely frequency excitation electric multi parameter simultaneous measuring of absolute phase - Google Patents
Swash the method and instrument of the electricity timely frequency excitation electric multi parameter simultaneous measuring of absolute phase Download PDFInfo
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- CN106932825A CN106932825A CN201511007481.XA CN201511007481A CN106932825A CN 106932825 A CN106932825 A CN 106932825A CN 201511007481 A CN201511007481 A CN 201511007481A CN 106932825 A CN106932825 A CN 106932825A
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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
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Abstract
The invention discloses the method and instrument of a kind of sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase, measuring method is：Potential difference and show the potential difference curve in real time that the square wave of the different frequency sent with the method synchronous recording current electrode of time-domain is formed between measuring electrode, the real part and imaginary part of fundamental wave are obtained by calculating, and then the absolute phase of induced polarization is obtained, and realize frequency excitation electric multi parameter simultaneous measuring during once power supply.Measuring instrument includes transmitter, the receiver of Synchronization Control, and PC104 industrial computers, LCD display, storage dish are provided with transmitter, receiver.Transmitter, receiver use line locking or quartz clock quartz lock or satellite fix synchronization.The present invention realizes being measured while swashing electricity absolute phase timely frequency excitation electric multi parameter.
Description
Technical field
The present invention relates to the measuring method and instrument of a kind of geologic prospect Geophysical parameters, more particularly to a kind of sharp electricity
The method and measuring instrument of the timely frequency excitation electric multi parameter simultaneous measuring of absolute phase.
Background technology
So far, many use time domain induced polarization instrument devices of measuring instrument that domestic geological prospecting mechanism uses.
And frequency domain is only capable of measuring instrument of two potential differences of frequency by being calculated apparent rate of frequency spread respectively, later
The three-frequency excitation instrument of appearance, is measurement relative phase.At present, the domestic instrument without measurement absolute phase,
More without when frequency excitation electric multi parameter simultaneous measuring instrument.External representative instrument is mostly multi-functional
Electrical prospecting apparatus.For its sharp Electricity Functional, measurement frequency domain and IP of time domain parameter are as two methods point
Open what is independently carried out, it is impossible to when frequency excitation electric multi parameter simultaneous measuring.
The content of the invention
Can not simultaneously measure absolute phase for existing measuring instrument, it is impossible to when frequency excitation electric multi parameter simultaneously survey
The technical deficiency of amount, swashs the electricity timely frequency excitation electric multi parameter of absolute phase same it is an object of the invention to provide one kind
When the method that measures and instrument.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of method of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase, it is characterised in that：Measurement
Method is：
1st, under conditions of ensureing that power supply is synchronous with measurement, confessed to underground by current electrode from transmitter
The Continuous Rectangular ripple of at least one frequency；
2nd, receiver is recorded by the method for measuring electrode time-domain and shows the potential difference under given frequency
And its curve；
3rd, the potential difference and curve that will be obtained in step 2, the real part of fundamental wave is asked for by Fourier analysis method
And imaginary part, and then calculate apparent resistivity, regarding absolute phase；
4th, while apparent resistivity is measured and regarding absolute phase, imitated according to the induced polarization in linear scope
The charging process and discharge process answered are equivalent principles, the frequency≤0.25Hz measured using once powering
Given frequency potential difference curve, calculate IP of time domain parameter apparent chargeability, apparent chargeability, decay
Curve.
It is described to power once or twice, the potential difference amplitude of at least two frequencies is measured, try to achieve and dissipate rate regarding width,
Measure two frequencies regarding phase, try to achieve regarding mutually dissipating rate.
The potential difference that will be obtained in step 2 and curve, signal to noise ratio is improved using the synchronous multicycle addition method,
Compacting interference signal.
It is described to use superposition observation time for the integral multiple in measured signal cycle to eliminate power frequency component, wherein
Superposition observation time >=0.5 second.
The apparent chargeability for taking not in the same time or apparent chargeability depict attenuation curve.
A kind of instrument of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase, including Synchronization Control hair
Machine, receiver are sent, VMOS inverter bridge modules, method of synchronization control module, electricity are provided with transmitter circuit
Stream sampling module, current sample module, current electrode, power high voltage power supply, instrument battery, current sampling
Module is connected into VMOS inverter bridge modules, time-sequence control module, instrument battery is provided with receiver circuit, is increased
Beneficial control module, pre-amplifying module, method of synchronization control module, 24 analog-to-digital conversion modules, measurement electricity
Pole, time-sequence control module, method of synchronization control module are connected into 24 analog-to-digital conversion modules, sequential control respectively
Molding block is connected into gain control module, and gain control module is connected into pre-amplifying module, it is characterised in that：
An industrial computer and keyboard, screen, and current control module, Waveform composition module are set in transmitter circuit, electricity
Flow control module, current sample module, Waveform composition module, method of synchronization control module respectively with industrial computer
It is connected, current sample module is connected into current control module, and method of synchronization control module is connected into Waveform composition module；
If a photoelectric isolation module, comprising two drive modules, a V/F module, photoelectric isolation module is connected into electricity
Stream sampling module, current control module, Waveform composition module are connected into photoelectric isolation module respectively；It is provided with PWM
(pulse-width-modulating type) current stabilization circuit, the drive module of a photoelectric isolation module is connected into PWM current stabilization circuits, PWM
Current stabilization circuit is connected with current sampling module, and current sampling module is connected into V/F modules, another Phototube Coupling mould
The drive module of block is connected into VMOS inverter bridge modules；An industrial computer, industrial computer are provided with receiver circuit
It is connected with time-sequence control module, method of synchronization control module, 24 analog-to-digital conversion modules respectively.
The industrial computer is PC104 industrial computers, is provided with LCD display, storage dish.
The transmitter is line locking or quartz clock quartz lock or satellite fix with the connected mode of receiver
It is synchronous.
It is described in PWM current stabilization circuits, reference signal module, current settings module, comparator, driver
VMOS power tubes are linked in sequence and are connected into, the filtered device of VMOS power tube output ends, amplifier are connected into and compare
Device input, VMOS power tubes output end connects ground through a resistance；Transmitted waveform input line is through Phototube Coupling
Module, driver are connected into inverter bridge module.
Beneficial effects of the present invention are：As long as observe appropriate frequency regarding phase angle, so that it may describe big
The polarity effect on ground；Absolute phase can be tried to achieve by calculating potential difference, avoid the larger direct measurement of difficulty
The problem of phase, greatly reduces the difficulty for developing instrument；Only need one-shot measurement, a frequency, you can
To the apparent resistivity of frequency domain and regarding absolute phase, the apparent chargeability of time-domain, apparent chargeability and attenuation curve.
Not only contribute to theoretical research and FORWARD AND INVERSE PROBLEMS is calculated, also greatly improve field work efficiency, and can basis times
Business target and the flexible selection parameter of measurement result, so as to obtain optimal geological effect；The calculating of absolute phase
Journey and " the synchronous multicycle addition method " have the ability of stronger compacting interference, are conducive to improving certainty of measurement；
Different rock and ores, the maximum of its phase-frequency characteristic curve correspond to different " crest frequencies ", meanwhile, tool
Have it is different dissipate rate regarding width, new parameter can be provided for differentiation anomalous property；Due to measurement is to regard telegram in reply
Resistance rate amplitude and phase, when frequency is more, can also carry out complex resistivity method (CR) and spectrum induced polarization method (SIP)
Measurement, and measurement frequency dispersion rate and the method for relative phase conventional at present can not accomplish this point；Time domain
The time of measuring of parameters of electrical induction shifts to an earlier date significantly, and sharp electrical characteristics will be protruded more, is conducive to the research of attenuation characteristic,
It is contemplated that having more preferable effect in the work such as water detection based on studying attenuation characteristic.
Brief description of the drawings
Fig. 1 is the Continuous Rectangular for determining frequency that transmitter of the invention is confessed by electrodes of A B to underground
The oscillogram of ripple.
Fig. 2 is that receiver of the invention is recorded by the method for measuring electrode MN time-domains and shows given
Potential difference oscillogram under frequency.
Transmission characteristic when Fig. 3 is noise signal of the invention identical with measured signal phase.
Fig. 4 is the exhausted of transmission characteristic maximum when there is phase difference between noise signal of the invention and measured signal
To the estimation schematic diagram being worth.
Fig. 5 is that transmitter of the invention sends oscillogram.
Fig. 6 is pulse-width-modulating type current stabilization (PWM) circuit theory diagrams of the invention.
Fig. 7 is transmitter operation principle block diagram of the invention.
Fig. 8 is operation of receiver theory diagram of the invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
The present invention is not limited to following preferred forms, and anyone can draw it under enlightenment of the invention
His various forms of products, however, make any change in its shape or structure, it is every with the application
Technical scheme as same or like, within the scope of the present invention.
As shown in Fig. 1~Fig. 5, measuring method of the invention is：
1st, electricity absolute phase measurement is swashed.
(1), swash electricity absolute phase e measurement technology scheme refer to ensure power supply it is synchronous with measurement under conditions of,
Confess the Continuous Rectangular ripple of certain frequency, waveform such as Fig. 1 to underground by electrodes of A, B from transmitter.
(2) under, receiver is recorded and shows given frequency by the method for measuring electrode M, N time-domain
Potential difference, waveform is as shown in Figure 2.
(3) real part and imaginary part of fundamental wave, are asked for by Fourier analysis method, and then calculates Apparent complex resistivity
Amplitude (mould) and absolute phase.Specific formula for calculation is：
Amplitude (mould) isFormula 3
Then,
So, just complete and swash electricity absolute phase measurement.
Frequency excitation electric multi parameter simultaneous measuring when the 2nd,.
While apparent resistivity is measured and regarding phase, according to the charging of the effect of induced polarization in linear scope
Process and discharge process are this equivalent principles, the given frequency measured using once powering (frequency≤
During 0.25Hz) potential difference curve (equivalent to the forward and reverse charging curve of time-domain, in time-domain, typically
Power supply unidirectional pulse width 2S~8S), can calculate IP of time domain parameter apparent chargeability, apparent chargeability and
Attenuation curve etc., formula is as follows：
(1) apparent chargeability.
Formula 6
Wherein ηs(t)、ΔV2T () is respectively the polarizability and secondary field value of t, Δ V1+2It is resultant field value.
(2) apparent chargeability.
Formula 7
In tool：MsT () is the apparent chargeability value of t, Δ t is integration half-interval.
(3) attenuation curve
Describe attenuation curve by taking apparent chargeability or apparent chargeability not in the same time.
Frequency field parameter：
(4) apparent resistivity：Such as formula 4.
(5) regarding (absolute) phase：Such as formula 5.
Here it is once observing the technical scheme of frequency excitation electric multi parameter simultaneous measuring when realizing.
If twice (or once) power supply, two frequencies being surveyed, can also try to achieve：
(6) rate is dissipated regarding width.
Two potential difference amplitudes of frequency of observation, dissipating rate depending on width can be calculated by following formula：
Formula 8
F in formulasIt is to dissipate rate regarding width；Respectively low frequency, high frequency potential difference amplitude.
(7) regarding mutually scattered rate.
Two frequencies of observation regarding phase, can be calculated by following formula depending on mutually dissipating rate：
Formula 9
X in formulasIt is regarding mutually scattered rate；φg、φdRespectively high frequency, low frequency regarding phase.
So, it is achieved that and swashs electricity population parameter measurement.
3rd, on compacting interference problem
Correlation function analysis method is commonly used in Weak absorption.So-called correlation function is divided into cross-correlation function
And auto-correlation function, cross-correlation function is represented by：
Formula 10
Auto-correlation function is represented by：
Formula 11
Formula 10 and the formula of formula 11 2 are compared with formula 1 and formula 2, it has been found that：Their shapes
Formula is identical, simply differs from a constant " τ ".As long as realizing synchronization, so that it may so that τ=0, so,
Their form is just identical.Thus, it is proposed that harmonic analysis method be exactly a kind of correlation function
Measurement.
In the ideal case, a cycle signal is only needed, can be obtained with formula 1, formula 2 and formula 5
The absolute phase values of precision satisfaction.
But stronger interference is usually constructed with the wild, signal to noise ratio can be improved using the method for multicycle superposition.
This way is called the synchronous multicycle addition method by we.In Weak absorption, " the synchronous multicycle folds
Addition " is exactly the matched filter with maximum signal to noise ratio, and transmission characteristic shows that it has stronger compressed dry
Disturb ability.
Herein, we omit loaded down with trivial details mathematical derivation, only provide the transmission of " the synchronous multicycle addition method "
Characteristic curve.Along to transmission characteristic state exclusive PCR ability method, we calculate noise signal with
Transmission characteristic when measured signal phase is identical, as shown in figure 3, wherein, f is signal frequency, f0Work
Frequency, n stacking folds, n=1 is curve when being superimposed a time, the like.
When there is phase difference between noise signal and measured signal, become because of transmission characteristic with phase, Wo Menqu
The absolute value of out of phase maximum makees to estimate that as a result as shown in Figure 4 wherein, f is signal frequency, f0 works
Working frequency, n stacking folds, n=1 is curve when being superimposed a time, the like.
The filter effect of the synchronous multicycle addition method is good：Stacking fold is more, and its passband is narrower, especially
It is front end, with the increase of stacking fold, is decayed very fast；Low-frequency range is slightly weaker.
We could also generalize to an evident characteristic, exactly how to change regardless of the phase of signal, as long as signal
Frequency is the following multiple of working frequency：
Formula 12
It is 0 to be just all attenuated.That is, when the integral multiple that observation time is the measured signal cycle is superimposed,
Measured signal is eliminated, and only service frequency signal is retained.It can be seen that, as long as superposition observation time
>=0.5 second, 50Hz Hz noises can just be removed well.It is noted that the transmission characteristic shown in Fig. 4
It is maximum estimated, in fact, the actual attenuation of frequency understands the data stronger of compared estimate beyond working frequency
A bit, the effect of compacting interference can be more preferable.
As shown in fig. 7, instrument of the present invention includes transmitter, the receiver of Synchronization Control.In transmitter circuit
In be additionally provided with PC104 industrial computers, contain LCD display, storage dish, and current electrode, power high-tension electricity
Source, instrument battery.Current control module, current sample module, Waveform composition module, method of synchronization control
Module is connected with industrial computer respectively, and current sample module is connected into current control module, method of synchronization control module
It is connected into Waveform composition module；Photoelectric isolation module include two drive modules, a V/F modules, photoelectricity every
Current sample module is connected into from module, current control module, Waveform composition module are connected into Phototube Coupling mould respectively
Block；PWM (pulse-width-modulating type) current stabilization circuit is provided with, the drive module of a photoelectric isolation module is connected into PWM
Current stabilization circuit, PWM current stabilization circuits are connected with current sampling module, and current sampling module is connected into V/F modules,
Drive module, the current sampling module of another photoelectric isolation module are connected into VMOS inverter bridge modules, VMOS respectively
Inverter bridge module connects two electrodes of A, B.
1. transmitter can send multifrequency (128Hz-128s, with 2nPower successively decreases, n=7-7 round numbers, can
Have 15 frequencies), the good Continuous Rectangular ripple of frequency stability, referring to Fig. 5.
2. the square wave current must be stable, such as load or voltage change 10%, and its curent change should be small
It is that this will design current stabilization circuit in 0.5%, such as pulse-width-modulating type current stabilization (PWM) circuit, referring to Fig. 6.
3. the power of transmitter is sufficiently large, it is impossible to less than 400 watts, while small volume, lightweight is required,
It is suitable to generaI investigation.
As shown in figure 8, a PC104 industrial computers are set in receiver circuit, containing LCD display, storage dish,
And instrument battery, measuring electrode.PC104 industrial computers control mould with time-sequence control module, the method for synchronization respectively
Block, 24 analog-to-digital conversion modules are connected.Time-sequence control module, method of synchronization control module are connected into 24 respectively
Position analog-to-digital conversion module, time-sequence control module is connected into gain control module, and gain control module is connected into preceding storing
Big module.
1. the short-circuit noise of receiver is as far as possible small, should typically be not more than 0.5 μ v (microvolt).
2. the microcomputer of built-in PC 104 is had in receiver, it is possible to achieve the storage of mass data, transmission, many
Secondary superposition and real-time processing；Also 24 A/D, for carrying out analog-to-digital conversion and digital filtering.
3. the fluorescent screen of receiver will in real time show measurement potential difference curve and main parameter.
Ensure that power supply and the synchronous method of measurement are line locking or quartz clock quartz lock or satellite fix synchronization.
Satellite fix (GPS) is light, time service precision is high, and typical time precision can meet phase up to≤400ns
The requirement of position measurement.Have the disadvantage to be influenceed by covering, such as in forestland distribution, tunnel and interior because receiving not
Can not be worked to satellite-signal.
As shown in fig. 6, in PWM current stabilization circuits, reference signal module, current settings module, comparator,
Driver is linked in sequence and is connected into VMOS power tubes, and the filtered device of VMOS power tube output ends, amplifier connect
Enter comparator input terminal, VMOS power tubes output end connects ground through a resistance；Transmitted waveform input line is through light
Electric isolution module, driver are connected into inverter bridge module.
Claims (9)
1. a kind of method of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase, it is characterised in that：
Measuring method is：
[1], under conditions of ensureing that power supply is synchronous with measurement, supplied to underground by current electrode from transmitter
Go out the Continuous Rectangular ripple of at least one frequency；
[2], receiver is recorded by the method for measuring electrode time-domain and shows the current potential under given frequency
Difference and its curve；
[3], the potential difference and curve that will be obtained in step [2], fundamental wave is asked for by Fourier analysis method
Real part and imaginary part, so calculate apparent resistivity, regarding absolute phase；
[4], while apparent resistivity is measured and regarding absolute phase, according to the induced polarization in linear scope
The charging process and discharge process of effect are equivalent principles, the frequency≤0.25Hz measured using once powering
Given frequency potential difference curve, calculate IP of time domain parameter apparent chargeability, apparent chargeability, decay
Curve.
2. the side of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 1
Method, it is characterized by：Power once or twice, measure the potential difference amplitude of at least two frequencies, try to achieve regarding width
The rate of dissipating, measure two frequencies regarding phase, try to achieve regarding mutually dissipating rate.
3. the side of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 1
Method, it is characterized by：The potential difference and curve that will be obtained in step [2], using the synchronous multicycle addition method
Signal to noise ratio is improved, interference signal is suppressed.
4. the timely frequency excitation electric multi parameter simultaneous measuring of sharp electric absolute phase according to claim 1 or 3
Method, it is characterized by：Superposition observation time is used for the integral multiple in measured signal cycle to eliminate power frequency
Signal, wherein superposition observation time >=0.5 second.
5. the side of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 1
Method, it is characterized by：Take apparent chargeability not in the same time or apparent chargeability depicts attenuation curve.
6. a kind of instrument of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase, including Synchronization Control
Transmitter, receiver, be provided with transmitter circuit VMOS inverter bridge modules, method of synchronization control module,
Current sampling module, current sample module, current electrode, power high voltage power supply, instrument battery, electric current take
Egf block is connected into VMOS inverter bridge modules, be provided with receiver circuit time-sequence control module, instrument battery,
Gain control module, pre-amplifying module, method of synchronization control module, 24 analog-to-digital conversion modules, measurements
Electrode, time-sequence control module, method of synchronization control module are connected into 24 analog-to-digital conversion modules, sequential respectively
Control module is connected into gain control module, and gain control module is connected into pre-amplifying module, it is characterised in that：
An industrial computer and keyboard, screen, and current control module, Waveform composition module are set in transmitter circuit,
Current control module, current sample module, Waveform composition module, method of synchronization control module respectively with industry control
Machine is connected, and current sample module is connected into current control module, and method of synchronization control module is connected into Waveform composition mould
Block；If a photoelectric isolation module, comprising two drive modules, a V/F module, photoelectric isolation module connects
Enter current sample module, current control module, Waveform composition module are connected into photoelectric isolation module respectively；It is provided with
PWM current stabilization circuits, the drive module of a photoelectric isolation module is connected into PWM current stabilization circuits, PWM current stabilization circuits
It is connected with current sampling module, current sampling module is connected into V/F modules, the driving of another photoelectric isolation module
Module；Be provided with an industrial computer in receiver circuit, industrial computer respectively with time-sequence control module, the method for synchronization
Control module, 24 analog-to-digital conversion modules are connected.
7. the instrument of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 6
Device, it is characterized by：Industrial computer is PC104 industrial computers, is provided with LCD display, storage dish.
8. the instrument of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 6
Device, it is characterized by：Transmitter is line locking or quartz clock quartz lock or satellite with the connected mode of receiver
Positioning synchronous.
9. the instrument of the sharp electric timely frequency excitation electric multi parameter simultaneous measuring of absolute phase according to claim 6
Device, it is characterized by：In PWM current stabilization circuits, reference signal module, current settings module, comparator,
Driver is linked in sequence and is connected into VMOS power tubes, and the filtered device of VMOS power tube output ends, amplifier connect
Enter comparator input terminal, VMOS power tubes output end connects ground through a resistance；Transmitted waveform input line is through light
Electric isolution module, driver are connected into inverter bridge module.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725045A (en) * | 2017-09-27 | 2018-02-23 | 中国石油天然气集团公司 | A kind of multipole polarizability combination logging tool and its logging method |
| CN112882105A (en) * | 2021-01-13 | 2021-06-01 | 廊坊市立福地质勘查技术有限公司 | Self-synchronizing method for receiving rectangular wave periodic signal |
| CN113985484A (en) * | 2021-11-24 | 2022-01-28 | 廊坊市立福地质勘查技术有限公司 | Double-domain induced polarization instrument |
-
2015
- 2015-12-29 CN CN201511007481.XA patent/CN106932825A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725045A (en) * | 2017-09-27 | 2018-02-23 | 中国石油天然气集团公司 | A kind of multipole polarizability combination logging tool and its logging method |
| 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 |
| CN112882105A (en) * | 2021-01-13 | 2021-06-01 | 廊坊市立福地质勘查技术有限公司 | Self-synchronizing method for receiving rectangular wave periodic signal |
| CN113985484A (en) * | 2021-11-24 | 2022-01-28 | 廊坊市立福地质勘查技术有限公司 | Double-domain induced polarization instrument |
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