CN107229082A - Physical prospecting instrument and its collecting method - Google Patents

Physical prospecting instrument and its collecting method Download PDF

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CN107229082A
CN107229082A CN201710382385.6A CN201710382385A CN107229082A CN 107229082 A CN107229082 A CN 107229082A CN 201710382385 A CN201710382385 A CN 201710382385A CN 107229082 A CN107229082 A CN 107229082A
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average value
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CN107229082B (en
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陈波
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Hunan Tianjian Ocean Engineering Equipment Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V9/00Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00

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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
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Abstract

The present invention relates to geologic prospect technical field, a kind of physical prospecting instrument and its collecting method are disclosed, to improve the accuracy of gathered data.The inventive method includes:Different pins based on same acquisition chip build analog channel and data channel with while gathering the analog signal values and digital signal value of same electrode pair respectively;User is obtained within a period of time, the magnitude of voltage of same observation station electric field, at least two analog signal values gathered and at least two digital signal values are directed under same frequency;All analog signal values to same observation station are screened, and calculate the simulation average value of available point;At the same time, all digital signal values of same observation station are screened, and calculates the digital average value of available point;The difference for simulating average value and digital average value is judged whether in given threshold, if it is, the median that modulus intends average value and digital average value is used as the magnitude of voltage of the measuring point electric field;If both differences exceed threshold value, instruction user sampling failure.

Description

Physical prospecting instrument and its collecting method
Technical field
The present invention relates to geologic prospect technical field, more particularly to a kind of physical prospecting instrument and its collecting method.
Background technology
At present, in the signal acquisition of physical prospecting instrument, traditional way is to gather virtual value (analog signal) conduct of signal Signal sample either by gathering the instantaneous value (data signal) of multiple signals, then does after average treatment, is used as signal post This.
Both approaches have certain defect, only if collection analog signal, probably due to circuit back noise and environment The influence of factor, signal might have obvious difference with former measured signal.Only if collection data signal, because signal is approximate For sine wave, the signal that the set time samples out, which is averaged, to cause signal amplitude slightly higher.
The content of the invention
Present invention aims at a kind of physical prospecting instrument and its collecting method is disclosed, to improve the accuracy of gathered data.
To achieve the above object, the present invention discloses the collecting method of physical prospecting instrument, including:
Different pins based on same acquisition chip build analog channel and data channel with while gathering same electricity respectively Extremely to analog signal values and digital signal value;
Obtain user a period of time in, under same frequency be directed to same observation station electric field magnitude of voltage, gathered to Few two analog signal values and at least two digital signal values;
All analog signal values to same observation station are screened, and calculate the simulation average value of available point;At the same time, All digital signal values of same observation station are screened, and calculate the digital average value of available point;
Judge it is described simulation average value and digital average value difference whether in given threshold, if it is, taking the mould The median for intending average value and digital average value is used as the magnitude of voltage of the measuring point electric field;If both differences exceed threshold value, refer to Show user's sampling failure.
It is corresponding with the above method, invention additionally discloses a kind of physical prospecting instrument, the same acquisition chip of its acquisition module Different pins build analog channel and data channel with while gathering the analog signal values and data signal of same electrode pair respectively Value;
The acquisition module, is additionally operable to obtain user within a period of time, same observation station electric field is directed under same frequency Magnitude of voltage, at least two analog signal values gathered and at least two digital signal values;All simulations to same observation station Signal value is screened, and calculates the simulation average value of available point;At the same time, all digital signal values of same observation station are entered Row screening, and calculate the digital average value of available point;Judge whether the difference of the simulation average value and digital average value is setting Determine in threshold value, if it is, taking the median of the simulation average value and digital average value as the magnitude of voltage of the measuring point electric field;Such as Both differences of fruit exceed threshold value, instruction user sampling failure.
The invention has the advantages that:
Different pins based on same acquisition chip build analog channel and data channel with while gathering same electricity respectively Extremely to analog signal values and digital signal value, eliminate same signal and separately gather caused phase difference;Pass through virtual value Screening, eliminate the invalid value produced by the misreading etc. of component noise and acquisition chip, and by simulate average value with The difference of digital average value when time sampling to giving objective examination, and it is comprehensive that final result takes two channel datas effectively gathered to carry out Close, compensate for the existing defect of single channel collection;Thereby, the present invention ensure that the accuracy of final data from multiple dimensions, The significant increase overall performance of physical prospecting instrument.
Below with reference to accompanying drawings, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of collecting method disclosed in the embodiment of the present invention.
Embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be defined by the claims Implement with the multitude of different ways of covering.
Embodiment one
The present embodiment discloses a kind of collecting method of physical prospecting instrument, as shown in figure 1, including:
Step S1, the different pins based on same acquisition chip build analog channel and data channel to gather simultaneously respectively The analog signal values and digital signal value of same electrode pair.
Step S2, obtains user within a period of time, the magnitude of voltage of same observation station electric field is directed under same frequency, is adopted At least two analog signal values and at least two digital signal values of collection.
Step S3, all analog signal values to same observation station are screened, and calculate the simulation average value of available point;With This is screened, and calculate the digital average value of available point to all digital signal values of same observation station simultaneously.
For example:Assuming that the analog signal values gathered in the period are 1000, the sieve screened to analog signal values Algorithm is selected to may include following step S31 to step S35.
Step S31, sampling array is arranged from small to large, they are labeled as into P1, P2... ..., P1000, then calculate most Big difference Kmax, wherein,
Step S32, judges KmaxValue, if Kmax≤ 10%, illustrate this array without invalid value;If Kmax> 10%, then It is calculated as below.
Step S33, one array k [n] of increase, 1≤n≤999, wherein,Then take out wherein It is all to be more than n values corresponding in 10% k values, by the sequence of n progress from small to large.
Step S34, makes a decision:If n values are both greater than 500, wherein minimum n values are taken, P is chosen1-PnIt is used as available point; If n values are both less than 500, maximum of which n values are taken, P is chosenn-P1000It is used as available point;It is more than if all of n values are existing 500 also have less than 500, then take 2 points closest to 500 in all collated n, it is assumed that is n1 and n2, then takes Pn1- Pn2For available point.
Step S35, the numerical value of available point does weighted average processing in the array filtered out, obtains the simulation average Value.
Corresponding, in another example, it is assumed that the digital signal value gathered in the period is 1000, and digital signal value is entered The filtering algorithm of row screening comprises the steps S310 to step S330.
Step S310, is D by array sort1-D1000, a new array z [999] is created first, wherein, zn=Dn+1-Dn, N ∈ (2,998).
Step S320, it is assumed that wherein some point zm, 2 < m < 998;There is zm×zm+1< 0, and zm×zm-1> 0, zm-1× zm-2> 0 and zm+1×zm+2> 0, zm+2×zm+3> 0, then take zm+1For available point.
The definition of maximum and minimum is in mathematics:Some it is minimum it is interval in, there is independent variable value x, and exist than It is greatly with smaller independent variable, and the functional value corresponding to these independents variable is respectively less than the corresponding functional values of x, then this functional value Referred to as maximum;Some is minimum interval interior, there is independent variable value x, and there is independent variable bigger than its and smaller, and these are certainly Functional value corresponding to variable is all higher than the corresponding functional values of x, then this functional value is referred to as minimum.
Above-mentioned steps S320 essence judges the crest and trough point of signal array, it is possible to found out with above-mentioned definition.Root According to above-mentioned definition, when at wave crest point, the point on the left side and the point on the right are respectively less than it, and second left point and the right second Individual point is also respectively less than the first from left and the right side one.Therefore difference is asked to understand them, the first from left subtracts wave crest point and subtracts multiplying for the right side one with crest Product is negative, and the second from left subtracts the first from left and subtracts the product of crest with the first from left for positive number, while crest subtracts the right side one subtracts the right side with the right side one For positive number similarly, trough point is also so to two products.
Step S330, then after being averaged to the absolute value of available point, then by behind the average value drawn divided by 1.414, 4 are taken after decimal point, the digital average value is drawn.
Step S4, judges the difference for simulating average value and digital average value whether in given threshold, if it is, modulus is intended The median of average value and digital average value as the measuring point electric field magnitude of voltage;If both differences exceed threshold value, indicate User's sampling failure.
Generally, collection of simulant signal to virtual value be equivalent to the absolute value of the crest of data signal or the value of trough and remove With 1.414.Therefore, the value obtained by above-mentioned 2 methods is theoretically equal.But, in reality, due to the difference of electronic device It is different, the power of interference, the error of chip collection voltages etc., two corresponding values are impossible definitely equal.Therefore, at this In embodiment, it is less than 25% (threshold value in correspondence above-mentioned steps S4) as long as both persons can be given tacit consent to and differed, then being averaged both Value regards as the final virtual value collected.
Therefore the weighted average (i.e. simulation average value in step S4) for only needing to draw analog signal is believed with numeral Number virtual value drawn (i.e. digital average value in step S4) is contrasted, and analog signal values are set into A, digital signal value at this D is set to, computational representation simulates the proportionality coefficient C of the difference of average value and digital average value.Specific formula for calculation is as follows:
In addition, be reduce acquisition chip amount of calculation, it is preferable that in the present embodiment the signal gain of collection of simulant signal with The signal gain of digital signal acquiring is consistent.
To sum up, different pins of the present embodiment based on same acquisition chip build analog channel and data channel with same respectively When gather the analog signal values and digital signal value of same electrode pair, eliminate same signal and separately gather caused phase Difference;By the screening of virtual value, the invalid value produced by the misreading etc. of component noise and acquisition chip is eliminated, and pass through The difference of simulation average value and digital average value when time sampling to giving objective examination, and final result takes two passages effectively gathered Data are integrated, and compensate for the existing defect of single channel collection;Thereby, the present invention ensure that final data from multiple dimensions Accuracy, the significant increase overall performance of physical prospecting instrument.
Embodiment 2
Corresponding with above method embodiment, the present embodiment discloses a kind of physical prospecting instrument, the same collection of its acquisition module The different pins of chip build analog channel and data channel with while gathering the analog signal values sum of same electrode pair respectively Word signal value.
Wherein, the present embodiment acquisition module is mainly used in:User is obtained within a period of time, for same under same frequency The magnitude of voltage of one measuring point electric field, at least two analog signal values gathered and at least two digital signal values;To same observation station All analog signal values screened, and calculate the simulation average value of available point;At the same time, to all numbers of same observation station Word signal value is screened, and calculates the digital average value of available point;Judging the difference of simulation average value and digital average value is It is no in given threshold, if it is, the median that modulus intends average value and digital average value is used as the magnitude of voltage of the measuring point electric field; If both differences exceed threshold value, instruction user sampling failure.Wherein, the same embodiment of the method for specific Processing Algorithm, no longer goes to live in the household of one's in-laws on getting married State.
Generally, physical prospecting instrument also includes the functional modules such as signal electrode, filtering, power frequency amplification, storage, and the contents of the section is existing There is technology, do not repeat.
Similarly, physical prospecting instrument disclosed in the present embodiment, the different pins based on same acquisition chip build analog channel respectively With data channel to gather the analog signal values and digital signal value of same electrode pair simultaneously, eliminate same signal and separately gather Caused phase difference;By the screening of virtual value, the nothing produced by the misreading etc. of component noise and acquisition chip is eliminated Valid value, and by simulating the difference of average value and digital average value to when time sampling gives objective examination, final result has taken Two channel datas of effect collection are integrated, and compensate for the existing defect of single channel collection;Thereby, it is of the invention from multiple dimensions It ensure that the accuracy of final data, the significant increase overall performance of physical prospecting instrument.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims (8)

1. a kind of collecting method of physical prospecting instrument, it is characterised in that including:
Different pins based on same acquisition chip build analog channel and data channel with while gathering same electrode pair respectively Analog signal values and digital signal value;
User is obtained within a period of time, the magnitude of voltage of same observation station electric field, at least two gathered are directed under same frequency Individual analog signal values and at least two digital signal values;
All analog signal values to same observation station are screened, and calculate the simulation average value of available point;At the same time, to same All digital signal values of one measuring point are screened, and calculate the digital average value of available point;
The difference of the simulation average value and digital average value is judged whether in given threshold, if it is, taking the simulation flat Average and the median of digital average value as the measuring point electric field magnitude of voltage;If both differences exceed threshold value, indicate to use Family sampling failure.
2. the collecting method of physical prospecting instrument according to claim 1, it is characterised in that assuming that gathered in the period Analog signal values are 1000, and the filtering algorithm screened to analog signal values includes:
Sampling array is arranged from small to large, they are labeled as P1, P2... ..., P1000, then calculate maximum difference Kmax, its In,
Judge KmaxValue, if Kmax≤ 10%, illustrate this array without invalid value;If Kmax> 10%, then counted as follows Calculate:
One array k [n] of increase, 1≤n≤999, wherein,Then take out and wherein all be more than 10% K values in corresponding n values, by the sequence of n progress from small to large;
Finally make a decision:If n values are both greater than 500, wherein minimum n values are taken, P is chosen1-PnIt is used as available point;If n values Both less than 500, then maximum of which n values are taken, P is chosenn-P1000It is used as available point;It is more than 500 if all of n values are existing Have less than 500, then take 2 points closest to 500 in all collated n, it is assumed that be n1 and n2, then take Pn1-Pn2To be effective Point;
The numerical value of available point does weighted average processing in the array filtered out, obtains the simulation average value.
3. the collecting method of physical prospecting instrument according to claim 1 or 2, it is characterised in that assuming that being adopted in the period The digital signal value of collection is 1000, and the filtering algorithm screened to digital signal value includes:
It is D by array sort1_D1000, a new array z [999] is created first, wherein, zn=Dn+1-Dn, n ∈ (2,998);
Assuming that wherein some point zm, 2 < m < 998;There is zm×zn+1< 0, and zm×zm-1> 0, zm-1×zm-2> 0 and zm+1 ×zm+2> 0, zm+2×zm+3> 0, then take zm-1For available point;
After being averaged again to the absolute value of available point, then by behind the average value drawn divided by 1.414,4 are taken after decimal point, Draw the digital average value.
4. the collecting method of physical prospecting instrument according to claim 3, it is characterised in that the signal of collection of simulant signal increases Benefit is consistent with the signal gain of digital signal acquiring.
5. a kind of physical prospecting instrument, it is characterised in that it is logical that the different pins of the same acquisition chip of its acquisition module build simulation respectively Road and data channel are with while gather the analog signal values and digital signal value of same electrode pair;
The acquisition module, is additionally operable to obtain user within a period of time, the electricity of same observation station electric field is directed under same frequency Pressure value, at least two analog signal values gathered and at least two digital signal values;To all analog signals of same observation station Value is screened, and calculates the simulation average value of available point;At the same time, all digital signal values of same observation station are sieved Choosing, and calculate the digital average value of available point;Judge whether the difference of the simulation average value and digital average value is setting threshold In value, if it is, taking the median of the simulation average value and digital average value as the magnitude of voltage of the measuring point electric field;If two The difference of person exceedes threshold value, instruction user sampling failure.
6. physical prospecting instrument according to claim 5, it is characterised in that assuming that the analog signal values gathered in the period are 1000, the filtering algorithm screened to analog signal values of the acquisition module includes:
Sampling array is arranged from small to large, they are labeled as P1, P2... ..., P1000, then calculate maximum difference Kmax, its In,
Judge KmaxValue, if Kmax≤ 10%, illustrate this array without invalid value;If Kmax> 10%, then counted as follows Calculate:
One array k [n] of increase, 1≤n≤999, wherein,Then take out and wherein all be more than 10% K values in corresponding n values, by the sequence of n progress from small to large;
Finally make a decision:If n values are both greater than 500, wherein minimum n values are taken, P is chosen1-PnIt is used as available point;If n values Both less than 500, then maximum of which n values are taken, P is chosenn-P1000It is used as available point;It is more than 500 if all of n values are existing Have less than 500, then take 2 points closest to 500 in all collated n, it is assumed that be n1 and n2, then take Pn1-Pn2To be effective Point;
The numerical value of available point does weighted average processing in the array filtered out, obtains the simulation average value.
7. the physical prospecting instrument according to claim 5 or 6, it is characterised in that assuming that the digital signal value gathered in the period For 1000, the filtering algorithm that the acquisition module is screened to digital signal value includes:
It is D by array sort1-D1000, a new array z [999] is created first, wherein, zn=Dn+1-Dn, n ∈ (2,998);
Assuming that wherein some point zm, 2 < m < 998;There is zm×zm+1< 0, and zm×zm-1> 0, zm-1×zm-2> 0 and zm+1 ×zm+2> 0, zm+2×zm+3> 0, then take zm+1For available point;
After being averaged again to the absolute value of available point, then by behind the average value drawn divided by 1.414,4 are taken after decimal point, Draw the digital average value.
8. physical prospecting instrument according to claim 7, it is characterised in that the signal gain of collection of simulant signal is adopted with data signal The signal gain of collection is consistent.
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