CN108132450B - Broadband electric-field sensor flatness optimization method based on data fusion mechanism - Google Patents
Broadband electric-field sensor flatness optimization method based on data fusion mechanism Download PDFInfo
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- CN108132450B CN108132450B CN201711163833.XA CN201711163833A CN108132450B CN 108132450 B CN108132450 B CN 108132450B CN 201711163833 A CN201711163833 A CN 201711163833A CN 108132450 B CN108132450 B CN 108132450B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
Broadband electric-field sensor flatness optimization method based on data fusion mechanism, steps are as follows: multiple measurement frequency points are arranged in the measurement frequency range of electric-field sensor, each induction antenna of electric-field sensor is obtained in the test data of each measurement frequency point, calculates the field strength measurement value of each induction antenna at each measurement frequency point；The feature judgment value for calculating each induction antenna of electric-field sensor at the measurement frequency point in the field strength measurement value of each measurement frequency point according to induction antenna carries out the feature extraction and feature identification of electric-field sensor；Fusion treatment is carried out according to field strength data of the characteristic value of the electric-field sensor of each measurement frequency point to entire measurement frequency range, calculates the fusion field strength of electric-field sensor.The present invention is based on Data fusion techniques, and the measurement data of multichannel electric field induction antenna is carried out Decision fusion, the advantage of multiple induction antennas is concentrated, makes up defect problem of the single group sensing antenna on local segments, and then achieve the purpose that optimization probe flatness.
Description
Technical field
The invention belongs to sensor measurement processing technology fields, in particular to a kind of to be applied to based on data fusion mechanism
The method of broadband electric-field sensor flatness optimization.
Background technique
The development of electric-field sensor in recent years is concentrated mainly on the design to electric field probe antenna, the choosing of sensor production device
Type, pick up calibration etc., the research in terms of sensor measurement data processing are seldom.Moreover, for sensor measurement
The processing of data more at present is calibrated about the linearity, to linearity school in the pick up calibration standard announced such as IEEE
Standard is analyzed, but the calibration about flatness, is worth the standard of reference and document very few.However, in engineer application
In, suitably the processing of progress sensor measurement data is necessary, and Back end data processing is cooperation hardware design to solve to pop one's head in
The important method of performance optimization problem.
Summary of the invention
The object of the present invention is to provide a kind of broadband electric-field sensor flatness optimization methods, take blend of predominance mechanism,
It solves the problems, such as that the flatness of the wide brought full frequency band of electric-field sensor system operating frequency is difficult to take into account, widens frequency to reach
Flatness is not reduced while band.
To achieve the goals above, the present invention adopts the following technical scheme that:
Broadband electric-field sensor flatness optimization method based on data fusion mechanism, steps are as follows:
S101, multiple measurement frequency points are set in the measurement frequency range of electric-field sensor, obtains electric-field sensor and respectively incudes day
Line calculates the field strength measurement value of each induction antenna at each measurement frequency point in the test data of each measurement frequency point；
S102, the field strength measurement value according to induction antenna in each measurement frequency point calculate electric field sensing at the measurement frequency point
The feature judgment value of each induction antenna of device carries out the feature extraction and feature identification of electric-field sensor；
The feature judgment value K of m-th of induction antenna of electric-field sensor at n-th of measurement frequency pointm(n)Pass through following formula
It calculates:
E in formulam(n)For at n-th of measurement frequency point in electric-field sensor m-th of induction antenna field strength measurement value, n
=1,2 ..., N, N are the quantity of measurement frequency point, and m=1,2 ..., M, M is the quantity of induction antenna in electric-field sensor；
For each measurement frequency point, a feature is formed by the feature judgment value of all induction antennas of electric-field sensor
Judgement combination (K1(n),…,Km(n),…,KM(n)), the spy of electric-field sensor at the measurement frequency point is determined according to feature judgment rule
Value indicative；
S103, the field strength data of entire measurement frequency range are melted according to the characteristic value of the electric-field sensor of each measurement frequency point
Conjunction processing, calculates the fusion field strength of electric-field sensor；
By the characteristic value (f of electric-field sensor at each measurement frequency point1,…,fn,…,fN) step-by-step or operation are carried out, obtain electricity
Fusion feature f of the field sensor in entirely measurement frequency ranges:
fs=f1∨f2…∨fn...∨fN=[w1,w2,…,wM]；
Wherein, fnFor the characteristic value of electric-field sensor at n-th of measurement frequency point, ∨ indicates step-by-step or operation；
According to fusion feature fsCalculate fusion field strength Ef:
Wherein, EmIndicate the practical field strength measured value of m-th of induction antenna.
More specifically, the step of determining the characteristic value of electric-field sensor at the measurement frequency point according to feature judgment rule is such as
Under:
A. determine that each induction antenna meets the frequency range of flatness requirement；Each measurement frequency in electric-field sensor measurement frequency range
Point carries out the flatness test in the case of standard field strength to each induction antenna respectively, is wanted according to the flatness of electric-field sensor
Seek the frequency range for determining that each induction antenna meets flatness requirement；
B. assume the feature judgement combination (K of n-th of measurement frequency point1(n),…,Km(n),…,KM(n)) in, m-th is felt
It answers for antenna, as feature judgment value Km(n)Meet the following conditions for the moment, it is believed that m-th of induction antenna is the measurement frequency point
Meet the antenna of flatness requirement:
When induction antenna has 0 or 1 resonance point: Km(n)> Pm1Or Km(n)∈[Pm2,Pm1] and Km+1(n)> Qm1, wherein
Pm1The 1st boundary value for being m-th of induction antenna in full frequency band, Pm2The 2nd for being m-th of induction antenna in full frequency band
Boundary value, Qm1Meet the 1st boundary value in flatness requirement frequency range, m in m-th of induction antenna for the m+1 induction antenna
When=M, Qm1Meet the 1st boundary value in flatness requirement frequency range in m-th of induction antenna for the 1st induction antenna；
When induction antenna has 2 or 2 or more resonance points: Km(n)> hm(1)；Or Km(n)∈[hm(i),hm(i-1)] and Km+1(n)
∈[Qm(2i-2),Qm(2i-3)], i=2 ..., I；Or Km(n)∈[Hm,hm(I)] and Km+1(n)>Qm(2I-1)；Wherein, hm(1)Feel for m-th
Answer maximum value of the antenna in the corresponding feature judgment value in each resonance point place, hm(i)It is special for the resonance point of m-th of induction antenna
Sign judges value setIn i-th of element, hm(I)For the resonance point feature judgment value set of m-th of induction antennaIn
I-th element, I are the resonance point number of induction antenna, HmIt is m-th of induction antenna in all frequency points for meeting flatness requirement
Minimum value in the corresponding feature judgment value in place, Qm(2i-2)Meet for the m+1 induction antenna in m-th of induction antenna flat
Degree requires the 2i-2 boundary value in frequency range.
From the above technical scheme, the present invention is based on data fusion mechanism, are repaired using the result of Data Fusion of Sensor
The data result that positive sensor directly acquires, can solve the flat of the wide bring full frequency band of electric-field sensor system operating frequency
Degree is difficult to the problem of taking into account, and can be applied in the Measurement and Data Processing fusion of broadband electric-field sensor, thus to electric field probe
Performance optimizes.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention.
Fig. 2 is the 10V/m frequency response curve of three induction antennas of the embodiment of the present invention；
Fig. 3 is the feature judgment value curve graph of three induction antennas of the embodiment of the present invention.
A specific embodiment of the invention is described in more detail below in conjunction with attached drawing.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out to the technical solution of the embodiment of the present invention clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, the every other implementation that those of ordinary skill in the art obtain without making creative work
Example, shall fall within the protection scope of the present invention.
One electric-field sensor may include multiple induction antennas, commonly to include three induction antenna (S1、S2、S3)
Electric-field sensor for, three induction antennas are respectively used to the electric field component on measurement different frequency, on electric-field sensor
Each induction antenna is independent sensing unit, and the typical operating frequency range of each induction antenna is different, and
Optimal working condition is within the scope of respective typical operating frequency.It, will after the induction antenna of electric-field sensor collects data
Data are transmitted to single-chip microcontroller, calculate field intensity value (E according to the data that sensor acquires by single-chip microcontroller1、E2、E3), then it will calculate
Obtained field strength data are transferred to host computer and carry out data processing, and the field intensity value for each induction antenna that host computer receives is in physics
It is independent from each other on route, only numerical values recited, does not include electric field frequency to be measured and phase information.
Since the induction antenna of electric-field sensor in design is classified according to frequecy characteristic, each induction antenna
Typical operating frequency range it is different, in different frequency ranges, single induction antenna on local segments can existing defects,
Therefore the field that each induction antenna field intensity value that each local segments measure in measurement frequency range finally transmits out electric-field sensor
The reliability of the numerical value of intensity values is different, i.e. field intensity value E of three induction antennas in different frequency range1、E2、E3Support not
Together, the antenna that advantage function (meeting flatness requirement) is played in some band limits may have one or more.Due to being tested field
Be by force it is unknown, the present invention passes through the field intensity value (E to each induction antenna1、E2、E3) efficiency assessment is carried out, by babble day
The measurement data of line carries out Decision fusion and makes up single sensing antenna in local frequency to concentrate the advantage of multiple induction antennas
Defect problem in section, and then achieve the purpose that optimize sensor flat degree.
Electric-field sensor flatness optimization method of the invention mainly include sensing data obtain, data characteristics extract and
Identification and the big step of fusion treatment three, Fig. 1 is the flow chart of the method for the present invention, below with reference to Fig. 1, to electric field sensing of the invention
The step of device flatness optimization method is illustrated, the method for the present invention is as follows:
S101, multiple measurement frequency points are set in the measurement frequency range of electric-field sensor, obtains electric-field sensor and respectively incudes day
Line calculates the field strength measurement of each induction antenna of electric-field sensor at each measurement frequency point in the test data of each measurement frequency point
Value；
S102, measurement frequency is calculated in the field strength measurement value of each measurement frequency point according to the induction antenna of electric-field sensor
The feature judgment value of each induction antenna of electric-field sensor at point carries out the feature extraction and feature identification of electric-field sensor；
Feature extraction is exactly that the feature judgment value of induction antenna, induction antenna are calculated according to the field strength measurement value of induction antenna
Feature judgment value be two induction antennas field strength measurement value ratio, at n-th of measurement frequency point, the m of electric-field sensor
The feature judgment value K of a induction antennam(n)It is calculated by the following formula:
E in formulam(n)For m-th of induction antenna S in electric-field sensor at n-th of measurement frequency pointmField strength measurement value, n
=1,2 ..., N, N are the quantity of measurement frequency point, and m=1,2 ..., M, M is the quantity of induction antenna in electric-field sensor；
After the feature judgment value for calculating all induction antennas, for each measurement frequency point, have by electric-field sensor
All induction antennas feature judgment value composition a feature judgement combination (K1(n),…,Km(n),…,KM(n)), according to spy
Sign judgment rule determines the characteristic value f of electric-field sensor at the measurement frequency pointn, an available spy of feature judgement combination
Value indicative fn, this feature value indicates to meet the induction antenna of flatness requirement in the measurement frequency point (frequency range), i.e., feature identifies；
S103, the field strength data of entire measurement frequency range are melted according to the characteristic value of the electric-field sensor of each measurement frequency point
Conjunction processing, calculates the fusion field strength of electric-field sensor；
By the characteristic value (f of electric-field sensor at each measurement frequency point1,…,fn,…,fN) step-by-step or operation are carried out, obtain electricity
Fusion feature f of the field sensor in entirely measurement frequency ranges:
fs=f1∨f2…∨fn…∨fN=[w1,w2,…,wM]；
Wherein, fnFor the characteristic value of electric-field sensor at n-th of measurement frequency point, ∨ indicates step-by-step or operation, step-by-step or fortune
The result w of calculation1、w2、wMIt is that 0 or 1,0 expression does not meet flatness requirement, 1 indicates to meet flatness requirement；
According to fusion feature fsCalculate fusion field strength Ef:
Wherein, EmIndicate the practical field strength measured value of m-th of induction antenna.
In step S102, feature judgment value is equal to the ratio of field strength measurement value between two induction antennas, and reflection is sense
The similitude of antenna performance is answered, on different frequency bands, the performance of different induction antennas is different, and the process of feature identification is exactly to determine
The process of the characteristic value of electric-field sensor determines which induction antenna meets the process of flatness requirement, in the same frequency range
It is interior that multiple induction antennas is allowed to meet flatness requirement simultaneously；The step of feature identifies is as follows:
A. determine that each induction antenna meets the frequency range of flatness requirement；Each measurement frequency in electric-field sensor measurement frequency range
Point carries out the flatness test in the case of standard field strength to each induction antenna respectively, is wanted according to the flatness of electric-field sensor
Seek the frequency range for determining that each induction antenna meets flatness requirement；
B. assume the feature judgement combination (K of n-th of measurement frequency point1(n),…,Km(n),…,KM(n)) in, m-th is felt
It answers for antenna, when the induction antenna is there are when 0 or 1 resonance point, feature judgment value Km(n)Meet the following conditions first
Think that m-th of induction antenna meets flatness requirement in the measurement frequency point (frequency range):
Km(n)> Pm1Or Km(n)∈[Pm2,Pm1] and Km+1(n)> Qm1；
Wherein, Pm1The 1st boundary value for being m-th of induction antenna in full frequency band, Pm2It is m-th of induction antenna complete
The 2nd boundary value in frequency range, Qm1Meet in flatness requirement frequency range for the m+1 induction antenna in m-th of induction antenna
1st boundary value, as m=M, Qm1Meet in flatness requirement frequency range in m-th of induction antenna for the 1st induction antenna
1 boundary value；
When the induction antenna is there are when I resonance point, I >=2 are corresponding in each resonance point place by m-th of induction antenna
Feature judgment value arranges from big to small, forms the resonance point feature judgment value set of m-th of induction antennaI=1 ..., I, as its feature judgment value Km(n)Meet the following conditions for the moment, it is believed that m
A induction antenna meets flatness requirement the measurement frequency point (frequency range):
Km(n)> hm(1)；Or Km(n)∈[hm(i),hm(i-1)] and Km+1(n)∈[Qm(2i-2),Qm(2i-3)], i=2 ..., I；Or
Km(n)∈[Hm,hm(I)] and Km+1(n)>Qm(2I-1)；
Wherein, hm(1)For maximum value of m-th of induction antenna in the corresponding feature judgment value in each resonance point place, hm(i)
For the resonance point feature judgment value set of m-th of induction antennaIn i-th of element (i-th arranged from big to small is sentenced
Disconnected characteristic value), corresponding, hm(i-1)It is then the resonance point feature judgment value set of m-th of induction antennaIn (i-1)-th member
Element, hm(I)For the resonance point feature judgment value set of m-th of induction antennaIn i-th element, i.e. m-th of induction antenna
The corresponding judging characteristic value of all resonance points in minimum value, HmIt is m-th of induction antenna in the institute for meeting flatness requirement
There are the minimum value in the corresponding feature judgment value in frequency point place, Qm(2i-2)Indicate the m+1 induction antenna in m-th of induction antenna
Meet the 2i-2 boundary value in flatness requirement frequency range, corresponding, Qm(2i-3)Indicate the m+1 induction antenna at m-th
Induction antenna meets the 2i-3 boundary value in flatness requirement frequency range, Qm(2I-1)Feel for the m+1 induction antenna at m-th
Antenna is answered to meet the 2I-1 boundary value in flatness requirement frequency range.
That is, for some only has 1 or the not induction antenna of resonance point, when the induction antenna is in a certain measurement
The feature judgment value K of frequency pointm(n)Greater than first boundary value P of the induction antenna in full frequency bandm1When, without considering other inductions
Antenna can determine that digital output value of the induction antenna on this frequency point meets the flatness requirement of electric-field sensor；When
Km(n)In [Pm2,Pm1] in range when, there may come a time when to will appear the corresponding measurement frequency point of this feature judgment value and want meeting flatness
With two kinds of situations not in the frequency range for meeting flatness requirement in the frequency range asked, need to be added the m+1 induction antenna at this time
Feature judgment value is judged, as the feature judgment value K of the m+1 induction antennam+1(n)Greater than the m+1 induction antenna is in m
A induction antenna meets the 1st boundary value Q in flatness requirement frequency rangem1When, then determine m-th of induction antenna on this frequency point
Digital output value meet the flatness requirement of electric-field sensor；The judgement of induction antenna with 2 or 2 or more resonance points
Process is same as above.Such as Pm1、Pm2、Qm1Value etc. each boundary value is empirical value, according to test of each induction antenna in full frequency band
Data determine that, when the selection for testing frequency point changes, the value of each boundary value also can accordingly change.
The present invention carries out decision according to the mutual support degree between each induction antenna of electric-field sensor, passes through induction antenna pair
Feature judgment value carry out the anti-induction antenna that pushes away and meet the band limits of flatness requirement, and then obtain the E in the frequency range1、
E2、E3Different supports, support of the invention refer to the reliability of induction antenna measurement data in each self-test frequency range, frequency
Counter push away of segment limit refers to according to the test data of each induction antenna calculating feature judgment value, so that it is right to analyze feature judgment value institute
The fixed frequency range answered.
The method of the present invention is described in detail with a specific embodiment below, the electric-field sensor packet in the present embodiment
Include three induction antenna S1、S2、S3, used three induction antenna S1、S2、S3Theoretical typical frequencies working range be respectively
1MHz~3GHz, 100MHz~18GHz and 500MHz~25GHz, the measurement frequency range of electric-field sensor are 0.5MHz~25GHz,
The flatness requirement of electric-field sensor is less than ± 3dB；
Firstly, taking N=90 measurement frequency point within the scope of measurement frequency range 0.5MHz~25GHz of electric-field sensor, will pass
Sensor is placed under 10V/m pattern field environment, is obtained field strength measurement value of each induction antenna at each measurement frequency point, is calculated each
The field strength measurement value of each induction antenna of measurement frequency point；
It is each that each induction antenna is calculated according to the field strength measurement value of each induction antenna measured in each measurement frequency point
The feature judgment value of measurement frequency point, at n-th of measurement frequency point, there are three feature judgment values altogether for the electric-field sensor:
K1(n)=E1(n)/E2(n), K2(n)=E2(n)/E3(n), K3(n)=E3(n)/E1(n)；
Wherein, E1(n)For the 1st induction antenna S in n-th of measurement frequency point electric-field sensor1Field strength measurement value, E2(n)
For the 2nd induction antenna S in electric-field sensor at n-th of measurement frequency point2Field strength measurement value, E3(n)For in n-th of measurement frequency
3rd induction antenna S in electric-field sensor at point3Field strength measurement value；Feature judgment value curve such as Fig. 3 of three induction antennas
It is shown；
The feature judgement combination of the measurement frequency point is made of the feature judgment value of all induction antennas of each measurement frequency point
(K1(n),K2(n),K3(n)), K1(n)Indicate the feature judgment value of the 1st induction antenna at n-th of measurement frequency point, K2(n)It indicates n-th
The feature judgment value of 2nd induction antenna, K at measurement frequency point3(n)Indicate the spy of the 3rd induction antenna at n-th of measurement frequency point
Judgment value is levied, the characteristic value of electric-field sensor at the measurement frequency point is determined according to feature judgment rule, that is, determines the measurement frequency point
Locating which induction antenna in three induction antennas is the induction antenna for meeting flatness requirement, the specific steps are as follows:
Judge that each induction antenna meets the frequency range of flatness requirement by drawing；It is measured according in each measurement frequency point
Field intensity value draw, abscissa is frequency, and ordinate is field intensity value, as shown in Figure 2；When the flatness of electric-field sensor is wanted
When asking as less than ± 3dB, the field strength measurement value that induction antenna obtains under the conditions of standard field strength is within the scope of 7V/m-14V/m
Think the flatness requirement for meeting ± 3dB, three induction antenna S it can be seen from field intensity curve figure (Fig. 2)1、S2、S3Meet
The frequency operating range of flatness requirement is respectively 0.5MHz~3.0GHz, and 95MHz~18GHz (removes 13000MHz, 16000MHz
Outside), 500MHz~25GHz；
Then, for the feature judgement combination (K of each measurement frequency point1(n), K2(n), K3(n)), successively judge each induction day
Whether line is eligible, so that it is determined that meet the antenna of flatness requirement, the boundary value of three induction antennas of the present embodiment and sentences
Broken strip part is as shown in table 1:
Table 1
| K1 | K2 | K3 | feature | Feature description |
| O | O | >0.77 | f3 | S3It works |
| O | [0.51,1.68] | >0.69 | f2 | S2It works |
| O | [1.68,2.27] | [0.41,1.09] | f2 | S2It works |
| O | >2.27 | O | f2 | S2It works |
| [0.64,1.03] | >0.64 | O | f1 | S1It works |
| >1.03 | O | O | f1 | S1It works |
Judged at each measurement frequency point after the characteristic value of electric-field sensor according to conditions above, by electric field at each measurement frequency point
Characteristic value (the f of sensor1,…,fn,…,fN) step-by-step or operation are carried out, electric-field sensor is obtained in entirely measurement frequency range
Fusion feature fs, according to fusion feature fsCalculate the fusion field strength E of actual measurementf。
The boundary value of 3 induction antennas of the present embodiment determines that steps are as follows using drawing:
Feature judgment value according to each induction antenna in each measurement frequency point is mapped, and abscissa is frequency, and ordinate is spy
Judgment value is levied, obtained feature judgment value curve graph is as shown in Figure 3.Have determined that three induction antenna S1、S2、S3Meet it is flat
The band limits that degree requires is respectively as follows: the 1st induction antenna S1The frequency range for meeting flatness requirement is 0.5MHz~3.0GHz, the
2 induction antenna S2The frequency range for meeting flatness requirement is 95MHz~18GHz (except 13000MHz, outside 16000MHz), the 3rd
Induction antenna S3The frequency range for meeting flatness requirement is 500MHz~25GHz；
For the 1st induction antenna, the 1st induction antenna does not have resonance point, from figure 3, it can be seen that in 0.5MHz
Except~3.0GHz frequency range, i.e., the 1st induction antenna is not met in the band limits of flatness requirement, the 1st induction antenna
Maximum value in all feature judgment values is 1.03, then 1st boundary value P of the 1st induction antenna in full frequency band11For
1.03, it can thus be appreciated that 1st boundary value of a certain induction antenna in full frequency band is that the induction antenna does not meet flatness at it
It is required that band limits in (each measurement frequency point) feature judgment value in maximum value；When meeting K1(n)When > 1.03, without examining
Consider the corresponding feature judgment value of other induction antennas, that is, can determine that frequency point (frequency range) meets flatness to the 1st induction antenna thus
It is required that antenna；
Simultaneously from fig. 3 it can also be seen that the 1st induction antenna meet the band limits 0.5MHz of flatness requirement~
In 3.0GHz, the minimum value in all feature judgment values is 0.64, then the 2nd of the 1st induction antenna boundary value P12For
0.64, it is wanted it can thus be appreciated that 2nd boundary value of a certain induction antenna in full frequency band meets flatness at it for the induction antenna
Minimum value in the band limits asked in the feature judgment value of (each measurement frequency point)；Work as K1(n)It, need to be by when [0.64,1.03] ∈
2nd induction antenna judges whether to meet flatness requirement, K1(n)When [0.64,1.03] ∈, the 1st induction antenna meets at it
Frequency point in the frequency range of flatness requirement has: 95MHz-150MHz, 250MHz, 400MHz, 450MHz, 550MHz,
700MHz, 750MHz and 950MHz, the minimum value above each frequency point in the feature judgment value of corresponding 2nd induction antenna are
0.64, while working as K1(n)When [0.64,1.03] ∈, the 2nd induction antenna meets the frequency of flatness requirement in the 1st induction antenna
Frequency point except rate range has: 21000MHz-25000MHz (except 22000MHz), corresponding 2nd above each frequency point
Maximum value in the feature judgment value of induction antenna is 0.18, and the larger value in the two is that the 2nd induction antenna incudes at the 1st
Antenna meets the 1st boundary value in flatness requirement frequency range, and 0.18 less than 0.64, then the 2nd induction antenna incudes at the 1st
Antenna meets the 1st boundary value Q in flatness requirement frequency range11It is 0.64, when meeting K1(n)∈ [0.64,1.03] and K2(n)>
When 0.64, it can determine that frequency point (frequency range) meets the antenna of flatness requirement to the 1st induction antenna thus.It is equivalent to Qm1For Km(n)∈
[Pm2,Pm1] when, the m+1 induction antenna each measurement frequency point in the frequency range that m-th of induction antenna meets flatness requirement
The minimum value of corresponding feature judgment value and the m+1 induction antenna do not meet the frequency of flatness requirement in m-th of induction antenna
The maximum value of the corresponding feature judgment value of each measurement frequency point within the scope of rate, the greater in the two values.
For the 2nd induction antenna, from figure 3, it can be seen that meeting flatness requirement in the 2nd induction antenna
There are two resonance point 13000MHz and 16000MHz in band limits 95MHz~18GHz, the 2nd induction antenna is humorous at the two
Corresponding feature judgment value is respectively 1.68 and 2.27 at vibration point, i.e., feature corresponding to the resonance point of the 2nd induction antenna is sentenced
Maximum value h in disconnected value2(1)It is 2.27, the minimum value h in feature judgment value corresponding to the resonance point of the 2nd induction antenna2(2)
It is 1.68,2.27 simultaneously and the 2nd induction antenna does not meet in the band limits of flatness requirement (95MHz~18GHz frequency range
Except) maximum value in all feature judgment values, when meeting K2(n)When > 2.27, without considering the corresponding spy of other induction antennas
Judgment value is levied, that is, can determine that frequency point (frequency range) meets the antenna of flatness requirement to the 2nd induction antenna thus；
The resonance point feature judgment value set of 2nd induction antennaWhen
K2(n)The feature judgment value for needing to be added the 3rd induction antenna when [1.68,2.27] ∈ is judged, K is worked as2(n)∈[1.68,
When 2.27], there are the following Frequency points for meeting flatness requirement for the 2nd induction antenna: 300MHz, 400MHz, 3500MHz, with
Maximum value at upper each frequency point in the feature judgment value of corresponding 3rd induction antenna is 1.09, minimum value 0.41, then the 3rd
A induction antenna meets the 1st boundary value Q in flatness requirement frequency range in the 2nd induction antenna21It is the 1.09, the 2nd boundary
Value Q22It is 0.41, then it is K that its corresponding judgment rule, which can be obtained,2(n)∈ [1.68,2.27] and K3(n)∈[0.41,1.09]；Phase
When in Qm(2i-2)And Qm(2i-3)Respectively Km(n)∈[hm(i),hm(i-1)] when, m-th of induction antenna meets each survey of flatness requirement
The minimum value and maximum value in the feature judgment value of the m+1 induction antenna corresponding to frequency point are measured, when there is more multiple resonance points,
Remaining boundary value is obtained using identical method；
Simultaneously as seen from Figure 3, the 2nd induction antenna is in frequency range 95MHz~18GHz that it meets flatness requirement
Minimum value in the corresponding feature judgment value of all measurement frequency points of (removing 13000MHz, 16000MHz) is 0.51, i.e. H2For
0.51, work as K2(n)∈[H2,h2(2)]=[0.51,1.68] when, there is the Frequency point for meeting flatness requirement in the 2nd induction antenna
For 95MHz and 450MHz-18000MHz (removing 3500MHz, 13000MHz, 16000MHz), corresponding 3rd above each frequency point
Minimum value in the feature judgment value of induction antenna is 0.69, and works as K2(n)When [0.51,1.68] ∈, the 3rd induction antenna exists
It is (except 3MHz) 0.5MHz-70MHz that 2nd induction antenna, which meets the Frequency point except the frequency range of flatness requirement, above
Maximum value in the feature judgment value of corresponding 3rd induction antenna of each frequency point is 0.35,0.35 less than 0.69, then the 3rd sense
Antenna is answered to work in the 2nd induction antenna the 3rd boundary value Q in frequency range23It is 0.69, i.e., ought meets K2(n)∈[0.51,
1.68] and K3(n)When > 0.69, it can determine that frequency point (frequency range) meets the antenna of flatness requirement to the 2nd induction antenna thus.Phase
When in Qm(2I-1)For Km(n)∈[Hm,hm(I)] when, the m+1 induction antenna meets the frequency of flatness requirement in m-th of induction antenna
Minimum value and the m+1 induction antenna within the scope of rate in feature judgment value corresponding to each measurement frequency point is in m-th of induction day
Line does not meet the maximum value in the corresponding feature judgment value of each measurement frequency point in the frequency range of flatness requirement, in two values
The greater.
For the 3rd induction antenna, from figure 3, it can be seen that except 500MHz~25GHz frequency range, i.e., the 3rd sense
Antenna is answered not meet in the band limits of flatness requirement, the maximum value of the feature judgment value of the 3rd induction antenna is 0.77, then
By the first boundary value P of the 3rd induction antenna31It is set to 0.77；In the present embodiment, the 3rd induction antenna does not have resonance point, and institute
There is feature judgment value to be all satisfied K3(n)> 0.77, without considering (the corresponding feature judgement of other induction antennas of other Rule of judgment
Value), that is, it can determine that frequency point (frequency range) meets the antenna of flatness requirement to the 3rd induction antenna thus.
Electric-field sensor flatness optimization method of the invention, on the basis of the electric-field sensor comprising multiple induction antennas
On, it is based on Data fusion technique, the measurement data of multichannel electric field induction antenna is subjected to Decision fusion, concentrates multiple induction antennas
Advantage, make up defect problem of the single group sensing antenna on local segments, so achieve the purpose that optimization probe flatness, benefit
The data directly acquired with the modified result sensor of Data Fusion of Sensor as a result, can solve electric-field sensor system work
The flatness of the wide bring full frequency band of working frequency is difficult to the problem of taking into account, and can be applied at the measurement data of broadband electric-field sensor
In reason fusion, so that the performance to electric field probe optimizes.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, although this
Invention has been disclosed in a preferred embodiment above, and however, it is not intended to limit the invention, any person skilled in the art,
It does not depart within the scope of technical solution of the present invention, is equal when the technology contents using the disclosure above are modified or are modified to
The equivalent embodiment of variation, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention to above
Any simple modification, equivalent change and modification made by embodiment, all of which are still within the scope of the technical scheme of the invention.
Claims (2)
1. the broadband electric-field sensor flatness optimization method based on data fusion mechanism, which is characterized in that steps are as follows:
S101, multiple measurement frequency points are set in the measurement frequency range of electric-field sensor, obtains each induction antenna of electric-field sensor and exists
The test data of each measurement frequency point calculates the field strength measurement value of each induction antenna at each measurement frequency point；
S102, electric-field sensor at the measurement frequency point is calculated in the field strength measurement value of each measurement frequency point according to induction antenna
The feature judgment value of each induction antenna carries out the feature extraction and feature identification of electric-field sensor；
At n-th of measurement frequency point, the feature judgment value K of m-th of induction antenna of electric-field sensorm(n)It is calculated by the following formula:
E in formulam(n)For at n-th of measurement frequency point in electric-field sensor m-th of induction antenna field strength measurement value, n=1,
2 ..., N, N are the quantity of measurement frequency point, and m=1,2 ..., M, M is the quantity of induction antenna in electric-field sensor；
For each measurement frequency point, a feature judgement is formed by the feature judgment value of all induction antennas of electric-field sensor
Combine (K1(n),…,Km(n),…,KM(n)), the characteristic value of electric-field sensor at the measurement frequency point is determined according to feature judgment rule；
S103, the field strength data of entire measurement frequency range are carried out at fusion according to the characteristic value of the electric-field sensor of each measurement frequency point
Reason, calculates the fusion field strength of electric-field sensor；
By the characteristic value (f of electric-field sensor at each measurement frequency point1,…,fn,…,fN) step-by-step or operation are carried out, obtain electric field biography
Fusion feature f of the sensor in entirely measurement frequency ranges:
fs=f1∨f2…∨fn…∨fN=[w1,w2,…,wM]；
Wherein, fnFor the characteristic value of electric-field sensor at n-th of measurement frequency point, ∨ indicates step-by-step or operation；
According to fusion feature fsCalculate fusion field strength Ef:
Wherein, EmIndicate the practical field strength measured value of m-th of induction antenna.
2. the broadband electric-field sensor flatness optimization method according to claim 1 based on data fusion mechanism, special
Sign is: the step of determining the characteristic value of electric-field sensor at the measurement frequency point according to feature judgment rule is as follows:
A. determine that each induction antenna meets the frequency range of flatness requirement；Each measurement frequency point in electric-field sensor measurement frequency range,
The flatness test in the case of standard field strength is carried out to each induction antenna respectively, it is true according to the flatness requirement of electric-field sensor
Fixed each induction antenna meets the frequency range of flatness requirement；
B. assume the feature judgement combination (K of n-th of measurement frequency point1(n),…,Km(n),…,KM(n)) in, for m-th of induction day
For line, as feature judgment value Km(n)Meet the following conditions for the moment, it is believed that m-th of induction antenna is meeting for the measurement frequency point
The antenna of flatness requirement:
When induction antenna has 0 or 1 resonance point: Km(n)> Pm1Or Km(n)∈[Pm2,Pm1] and Km+1(n)> Qm1, wherein Pm1For
1st boundary value of m-th of induction antenna in full frequency band, Pm2The 2nd boundary for being m-th of induction antenna in full frequency band
Value, when m=1,2 ..., M-1, Qm1Meet in flatness requirement frequency range in m-th of induction antenna for the m+1 induction antenna
1 boundary value, when m=M, Qm1Meet in m-th of induction antenna the 1st in flatness requirement frequency range for the 1st induction antenna
Boundary value；
When induction antenna has 2 or 2 or more resonance points: Km(n)> hm(1)；Or Km(n)∈[hm(i),hm(i-1)] and Km+1(n)∈
[Qm(2i-2),Qm(2i-3)], i=2 ..., I；Or Km(n)∈[Hm,hm(I)] and Km+1(n)>Qm(2I-1)；Wherein, hm(1)Incude for m-th
Maximum value of the antenna in the corresponding feature judgment value in each resonance point place, hm(i)For the resonance point feature of m-th of induction antenna
Judge value setIn i-th of element, hm(I)For the resonance point feature judgment value set of m-th of induction antennaIn
I element, I are the resonance point number of induction antenna, HmIt is m-th of induction antenna at all frequency points for meeting flatness requirement
Minimum value in corresponding feature judgment value, Qm(2i-2)It is flat to indicate that the m+1 induction antenna meets in m-th of induction antenna
Degree requires the 2i-2 boundary value in frequency range.
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