CN107229082B - Physical prospecting instrument and its collecting method - Google Patents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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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 acquisition data.The method of the present invention include: the different pins based on same acquisition chip construct respectively analog channel and data channel with and meanwhile acquire the analog signal values and digital signal value of same electrode pair；It obtains user whithin a period of time, the voltage value of same observation station electric field, at least two analog signal values collected and at least two digital signal values is directed under same frequency；All analog signal values of 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 so, modulus intends voltage value of the median of average value and digital average value as the measuring point electric field；If the difference of the two is more than threshold value, instruction user samples failure.
Description
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 technique
Currently, traditional way is to acquire virtual value (analog signal) conduct of signal in the signal acquisition of physical prospecting instrument
Signal sample either passes through the real value (digital signal) for acquiring multiple signals, after then doing average treatment, as signal post
This.
Both methods has certain defect, if only acquiring analog signal, probably due to circuit back noise and environment
The influence of factor, signal and former measured signal might have apparent difference.Only if acquisition digital signal, due to signal approximation
For sine wave, the signal that the set time samples out is averaged that will lead to signal amplitude slightly higher.
Summary of the invention
Present invention aims at a kind of physical prospecting instrument and its collecting method is disclosed, to improve the accuracy of acquisition data.
To achieve the above object, the present invention discloses the collecting method of physical prospecting instrument, comprising:
Different pins based on same acquisition chip construct respectively analog channel and data channel with and meanwhile acquire same electricity
Analog signal values and digital signal value extremely pair；
Obtain user whithin a period of time, under same frequency be directed to same observation station electric field voltage value, it is collected extremely
Few two analog signal values and at least two digital signal values；
All analog signal values of 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 so, taking the mould
Voltage value of the median of quasi- average value and digital average value as the measuring point electric field；If the difference of the two is more than threshold value, refer to
Show that user samples failure.
It corresponds to the above method, invention additionally discloses a kind of physical prospecting instrument, the same acquisition chip of acquisition module
Different pins construct respectively analog channel and data channel with and meanwhile acquire the analog signal values and digital signal of same electrode pair
Value；
The acquisition module is also used to obtain user whithin a period of time, and same observation station electric field is directed under same frequency
Voltage value, at least two analog signal values collected 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, to all digital signal values of same observation station into
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 so, taking voltage value of the median of the simulation average value and digital average value as the measuring point electric field；Such as
The difference of both fruits is more than threshold value, and instruction user samples failure.
The invention has the following advantages:
Different pins based on same acquisition chip construct respectively analog channel and data channel with and meanwhile acquire same electricity
Analog signal values and digital signal value extremely pair eliminate same signal and separately acquire caused phase difference；Pass through virtual value
Screening, eliminate invalid value caused by the misreading etc. of component noise and acquisition chip, and by simulation average value with
The difference of digital average value gives objective examination to when time sampling, and it is comprehensive that final result takes two channel datas effectively acquired to carry out
It closes, compensates for the existing defect of single channel acquisition；Whereby, the present invention ensures 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 described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of collecting method disclosed by the embodiments of the present invention.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached 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, comprising:
Step S1, the different pins based on same acquisition chip construct respectively analog channel and data channel with and meanwhile acquire
The analog signal values and digital signal value of same electrode pair.
Step S2 obtains user whithin a period of time, and the voltage value 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 screens all analog signal values of same observation station, and calculates the simulation average value of available point；With
This screens all digital signal values of same observation station, and calculate the digital average value of available point simultaneously.
Such as: assuming that analog signal values collected are 1000 in the period, the sieve that analog signal values are screened
Selecting algorithm may include following step S31 to step S35.
Step S31, sampling array is arranged from small to large, they are labeled as 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 follows.
Step S33 increases an array k [n], 1≤n≤999, whereinIt then takes out wherein
It is all to be greater than n value corresponding in 10% k value, n is subjected to sequence from small to large.
Step S34, makes a decision: if n value is both greater than 500, taking wherein the smallest n value, chooses P1-PnAs available point；
If n value is both less than 500, maximum n value is taken, chooses Pn-P1000As available point；It is greater than if all n values are existing
500 also have less than 500, then take 2 points in all collated n closest to 500, 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, and it is average to obtain the simulation
Value.
It is corresponding, in another example, it is assumed that digital signal value collected is 1000 in the period, to digital signal value into
The filtering algorithm of row screening includes the following steps S310 to step S330.
Array sort is D by step S3101-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.
Maximum and minimum in mathematics is defined as: in some minimum section, there are independent variable value x, and exist than
It is greatly with smaller independent variable, and functional value corresponding to these independents variable is respectively less than the corresponding functional value of x, then this functional value
Referred to as maximum；In some minimum section, there are independent variable value x, and there is independent variable bigger than its and smaller, these are certainly
Functional value corresponding to variable is all larger than the corresponding functional value of x, then this functional value is known as minimum.
Above-mentioned steps S320 essence is the wave crest and trough point for judging signal array, so that it may be 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
A point is also respectively less than the first from left and the right side one.Therefore they are sought into difference it is found that the first from left, which subtracts wave crest point, subtracts multiplying for the right side one with wave crest
Product is negative, and the second from left subtracts the first from left and the first from left subtracts the product of wave crest as positive number, while wave crest subtracts the right side one and subtracts the right side with the right side one
Similarly for positive number, trough point is also in this way to two products.
Step S330, then after being averaged to the absolute value of available point, then by the average value drawn divided by after 1.414,
4 are taken after decimal point, obtains the digital average value.
Step S4 judges the difference for simulating average value and digital average value whether in given threshold, if so, modulus is quasi-
Voltage value of the median of average value and digital average value as the measuring point electric field；If the difference of the two is more than threshold value, instruction
User samples failure.
In general, collection of simulant signal to virtual value be equivalent to the absolute value of the wave crest of digital signal or the value of trough and remove
With 1.414.It therefore, is theoretically equal by the value that above-mentioned 2 methods obtain.But in reality, due to the difference of electronic device
Different, the power of interference, the error etc. of chip collection voltages, corresponding two values are impossible absolutely equal.Therefore, at this
In embodiment, as long as both persons difference can be defaulted lower than 25% (threshold value in corresponding above-mentioned steps S4), by being averaged for the two
Value regards as collected final virtual value.
Therefore the weighted average (i.e. simulation average value in step S4) and number for only needing to obtain analog signal are believed
Number virtual value obtained (i.e. digital average value in step S4) compares, and analog signal values are set as A, digital signal value at this
It is set as D, 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, for reduce acquisition chip calculation amount, 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, the present embodiment constructs analog channel and data channel respectively based on the different pins of same acquisition chip with same
When acquire the analog signal values and digital signal value of same electrode pair, eliminate same signal and separately acquire caused phase
Difference；By the screening of virtual value, invalid value caused 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 gives objective examination to when time sampling, and final result takes two channels effectively acquired
Data are integrated, and the existing defect of single channel acquisition is compensated for；Whereby, the present invention ensures final data from multiple dimensions
Accuracy, the significant increase overall performance of physical prospecting instrument.
Embodiment 2
Corresponding to the above method embodiment, the present embodiment discloses a kind of physical prospecting instrument, the same acquisition of acquisition module
The different pins of chip construct respectively analog channel and data channel with and meanwhile acquire the analog signal values sum number of same electrode pair
Word signal value.
Wherein, the present embodiment acquisition module is mainly used for: user is obtained whithin a period of time, for same under same frequency
The voltage value of one measuring point electric field, at least two analog signal values collected 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；Average value is simulated in judgement and the difference of digital average value is
It is no in given threshold, if so, modulus intends voltage value of the median of average value and digital average value as the measuring point electric field；
If the difference of the two is more than threshold value, instruction user samples failure.Wherein, the same embodiment of the method for specific Processing Algorithm, it is no longer superfluous
It states.
In general, it is existing that physical prospecting instrument, which further includes functional modules, the contents of the section such as signal electrode, filtering, power frequency amplification, storage,
There is technology, does not repeat them here.
Similarly, physical prospecting instrument disclosed in the present embodiment, the different pins based on same acquisition chip construct analog channel respectively
The analog signal values and digital signal value for acquiring same electrode pair simultaneously with data channel, eliminate same signal and separately acquire
Caused phase difference；By the screening of virtual value, nothing caused by the misreading etc. of component noise and acquisition chip is eliminated
Valid value, and objective examination is given to when time sampling by the difference of simulation average value and digital average value, final result has taken
Two channel datas of effect acquisition are integrated, and the existing defect of single channel acquisition is compensated for；Whereby, the present invention is from multiple dimensions
Ensure the accuracy of final data, the significant increase overall performance of physical prospecting instrument.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of collecting method of physical prospecting instrument characterized by comprising
Different pins based on same acquisition chip construct respectively analog channel and data channel with and meanwhile acquire same electrode pair
Analog signal values and digital signal value；
Obtain user whithin a period of time, under same frequency be directed to same observation station electric field voltage value, collected at least two
A analog signal values and at least two digital signal values；The analog signal values are the simulation collected through the analog channel
Voltage value, the digital signal value are the digital voltage value collected through the data channel；
All analog signal values of 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 after being averaged to the absolute value of the available point filtered out, then will be drawn
Average value divided by after 1.414, the digital average value of available point is calculated；
The difference of the simulation average value and digital average value is judged whether in given threshold, if so, taking the simulation flat
The voltage value of mean value and the median of digital average value as the measuring point electric field；If the difference of the two is more than threshold value, instruction is used
Family sampling failure.
2. the collecting method of physical prospecting instrument according to claim 1, which is characterized in that assuming that collected 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,
In,
Judge KmaxValue, if Kmax≤ 10%, illustrate this array without invalid value；If Kmax> 10%, then counted as follows
It calculates:
Increase an array k [n], 1≤n≤999, whereinThen take out wherein all be greater than
N is carried out sequence from small to large by corresponding n value in 10% k value；
It finally makes a decision: if n value is both greater than 500, taking wherein the smallest n value, choose P1-PnAs available point；If n value
Both less than 500, then maximum n value is taken, P is chosenn-P1000As available point；If all n values are existing to be greater than 500
Have less than 500, then take 2 points in all collated n closest to 500, it is assumed that is n1 and n2, then takes Pn1-Pn2It is 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, which is characterized 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×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.
4. the collecting method of physical prospecting instrument according to claim 3, which is characterized 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, which is characterized in that it is logical that the different pins of the same acquisition chip of its acquisition module construct simulation respectively
Road and data channel to acquire the analog signal values and digital signal value of same electrode pair simultaneously；
The acquisition module is also used to obtain user whithin a period of time, and the electricity of same observation station electric field is directed under same frequency
Pressure value, at least two analog signal values collected and at least two digital signal values；The analog signal values are through the mould
The analog voltage that quasi- channel collects, the digital signal value are the digital voltage collected through the data channel
Value；All analog signal values of 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 after being averaged to the absolute value of the available point filtered out, then will be drawn
Average value divided by after 1.414, the digital average value of available point is calculated；Judge the simulation average value and digital average value
Difference whether in given threshold, if so, take it is described simulation average value and digital average value median as the measuring point
The voltage value of electric field；If the difference of the two is more than threshold value, instruction user samples failure.
6. physical prospecting instrument according to claim 5, which is characterized in that assuming that analog signal values collected are in the period
1000, the filtering algorithm of the acquisition module 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,
In,
Judge KmaxValue, if Kmax≤ 10%, illustrate this array without invalid value；If Kmax> 10%, then counted as follows
It calculates:
Increase an array k [n], 1≤n≤999, whereinThen take out wherein all be greater than
N is carried out sequence from small to large by corresponding n value in 10% k value；
It finally makes a decision: if n value is both greater than 500, taking wherein the smallest n value, choose P1-PnAs available point；If n value
Both less than 500, then maximum n value is taken, P is chosenn-P1000As available point；If all n values are existing to be greater than 500
Have less than 500, then take 2 points in all collated n closest to 500, it is assumed that is n1 and n2, then takes Pn1-Pn2It is effective
Point；
The numerical value of available point does weighted average processing in the array filtered out, obtains the simulation average value.
7. physical prospecting instrument according to claim 5 or 6, which is characterized in that assuming that digital signal value collected in the period
It is 1000, the filtering algorithm that the acquisition module screens 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.
8. physical prospecting instrument according to claim 7, which is characterized in that the signal gain of collection of simulant signal is adopted with digital signal
The signal gain of collection is consistent.
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