CN105372506B - A kind of mutative scale gridding method calculated for region electromagnetic environment and system - Google Patents
A kind of mutative scale gridding method calculated for region electromagnetic environment and system Download PDFInfo
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- CN105372506B CN105372506B CN201510719936.4A CN201510719936A CN105372506B CN 105372506 B CN105372506 B CN 105372506B CN 201510719936 A CN201510719936 A CN 201510719936A CN 105372506 B CN105372506 B CN 105372506B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R29/08—Measuring electromagnetic field characteristics
Abstract
The present invention relates to electromagnetic environment monitor technical field, and the invention discloses a kind of mutative scale gridding method calculated for region electromagnetic environment, it specifically includes following step：Region to be monitored is used into benchmark rasterizing, and distinguished with reference to geographical environmental information in region to be monitored and pay close attention to region and non-interesting region, region will be paid close attention to be divided with finer rasterizing yardstick, non-interesting region more domain will be divided with more rough rasterizing yardstick；After mutative scale rasterizing, calculated with new grid center, result of calculation represents the electromagnetic environment of whole grid region.By the above method, distinguished in region to be monitored and pay close attention to region and non-interesting region, both met user for paying close attention to the needs of the more careful differentiation in region, reduced amount of calculation again.The invention also discloses the system for realizing the above method.
Description
Technical field
The present invention relates to electromagnetic environment monitor technical field, is used for what region electromagnetic environment calculated the invention discloses a kind of
Mutative scale gridding method and system.
Background technology
As electromagnetic technique is in civilian, military domain extensive use, to the propagation properties under complex environment and
The research of the field strength distribution of whole region has great meaning.
Existing propagation properties prediction is broadly divided into empirical model analytic approach, semiempirical semidefiniteness model point
Analysis method and deterministic models analytic approach.Empirical model analytic approach is passed according to substantial amounts of actual electrical wave measurement's result statistical inference
Model is broadcast, method is simple, less demanding to environmental information, but computational accuracy is poor.Deterministic models analytic approach is based on to nothing
Line propagates Study of basic principle, is a kind of theoretical property model, its advantage is applicability is wide, computational accuracy is high etc., but operand is very
Greatly, arithmetic speed is slower.Semiempirical semidefiniteness model analysis method falls between, and in operand, computational accuracy, is applicable model
Place and done certain balance, be a kind of way of compromise.
But what current all algorithms were carried out both for formula radiation source, that is, pre-set position, the signal of radiation source
The parameters such as intensity, frequency, because the change that existing way can not be in real time to electromagnetic environment in space responds, it greatly limit
The application of the technology.
As CN201310754210.5 discloses a kind of evaluation method and device of the electromagnetic radiation from environment of base station.The base
The evaluation method for the electromagnetic radiation from environment stood includes：Obtain first amount of radiation estimate of the base station in the broadcast beam of a future position
With the base station the business beam of the future position the second amount of radiation estimate；According to the first amount of radiation estimate and
The second amount of radiation estimate, generate electromagnetic radiation from environment estimate of the base station in the future position.Realize this method
Premise be definitely to know that the base station is radiation source, and specifically know the parameter of the radiation source.
CN201510329815.9 discloses a kind of electromagnetism distribution situation emulated under Strong Electromagnetic Pulse and imitated for another example
True method.This method uses Finite Difference Time Domain pair using the electromagnetic pulse waveform under hyperbolic cosine function simulation time domain
The electromagnetic field change of environment carries out analogue simulation, and the acceleration of time-domain finite difference is realized using GPU, obtains the electricity in time domain
Magnetic distribution situation, finally by Fast Fourier Transform (FFT), the electromagnetism distribution situation in frequency domain is obtained, solve electromagnetic pulse force
The electromagnetic environment distribution character computational problem of super electrically large sizes object under device attack.Equally, the premise for realizing this method is also to be
Definitely know radiation source and know the parameter of the radiation source.
At the same time, the electromagnetic environment of one panel region calculate using the above method is all generally to carry out region
Rasterizing, then the electromagnetic field of each grid region is calculated, but so processing can be excessive for large area grid point, meter
Calculation amount can be very big.And for different districts domain therein, the attention rate of user may different, the requirement to computational accuracy
Difference.Thus existing rasterizing way is difficult to meet the needs of practical application, significantly limit the application of the technology
Scope.
The content of the invention
It is an object of the invention to solution, definitely method of the prior art is computationally intensive, it is difficult to meets the technology that user requires
Problem.The invention discloses a kind of mutative scale gridding method calculated for region electromagnetic environment, the invention also discloses one
Kind electromagnetic environment real-time monitoring system.
Technical scheme is as follows
The invention discloses a kind of mutative scale gridding method calculated for region electromagnetic environment, it specifically includes following
The step of：Region to be monitored is used into benchmark rasterizing, and distinguished with reference to geographical environmental information in region to be monitored
Region and non-interesting region are paid close attention to, region will be paid close attention to and divided with finer rasterizing yardstick, by non-interesting
Region is divided with more rough rasterizing yardstick；After mutative scale rasterizing, calculated, counted with new grid center
Calculate the electromagnetic environment that result represents whole grid region.
Further, the above method also includes：Step 1: multiple monitorings are set in the region for needing to monitor field strength
Point, the monitoring point are used to monitor field strength in real time；Step 2: the field strength monitored according to step 1, the position coordinates of monitoring point
And the geographical environment information in the region, radiation source is positioned in real time, and calculate the transmission power of radiation source；Step
3rd, the radiation source parameter and the geographical environment information in the region for needing to monitor calculated according to step 2 calculates area to be monitored
The electromagnetic environment distribution situation in domain.
Further, above-mentioned steps two specifically include following step：（1）Radiation source is positioned；（2）With reference to each prison
The position of measuring point and the radiation source positions determined, calculate the signal propagation path between each monitoring point and radiation source, institute respectively
Stating propagation path includes direct path, reflection path and diffraction path；（3）The signal of different propagateds is calculated at monitoring point
The propagation attenuation of composite signal, and the received signal strength of monitoring point measurement is combined, estimation radiation source to each monitoring point direction
On radiant power；（4）With reference to the radiant power on radiation source to each monitoring point direction, the transmitting work(of comprehensive assessment radiation source
Rate.
Further, above-mentioned positioning is specially that the position of radiation source is determined using positioning using TDOA or cross bearing.
Further, above-mentioned steps three specifically include：（a）The radiation source after positioning is found out with reference to geographical environmental information
Electromagnetic wave propagation path；（b）Geographical environment is averagely divided into multiple receiving points, calculated according to different propagation paths
The field strength of each receiving point in the geographical environment.
Further, step described above（a）In propagation path specifically include direct projection propagation path judgement, reflection
The lookup of propagation path and the lookup in diffraction propagation path.
Further, above-mentioned steps（b）Specifically include：Direct projection, diffraction and/or the reflection on per paths are calculated respectively
Propagation attenuation, and the field strength obtained on every paths is overlapped, so as to obtain the field strength of each receiving point.
Further, the calculation formula of above-mentioned direct projection field decay is：,, wherein,
For divergent-ray field strength,For the ray diffusion path length of direct wave receiving point,For wavelength.
Further, mirror fieldAnd diffraction fieldCalculation formula be respectively：,, wherein,、The respectively invasin of back wave and diffracted wave, R, D are respectively to reflect system
Number and diffraction coefficient, the field strength obtained to every propagation path of calculating are overlapped, and try to achieve total intensity,
, you can obtain the field strength of the receiving point.
The invention also discloses a kind of mutative scale rasterizing system calculated for region electromagnetic environment, it specifically includes base
Object staff degree rasterizing unit, geographical environment information acquisition unit, judging unit, rasterizing yardstick updating block；The station meter
Degree rasterizing unit is used to region to be monitored using benchmark rasterizing；The geographical environment information acquisition unit is used to obtain
Take the geographical environment information in region to be monitored；The judging unit is used to be distinguished in region to be monitored according to geographical environmental information
Pay close attention to region and non-interesting region；The rasterizing yardstick updating block is used for according to the judged result of judging unit more
The new rasterizing yardstick for paying close attention to region and non-interesting region, will pay close attention to region and is carried out with finer rasterizing yardstick
Division, non-interesting region is divided with more rough rasterizing yardstick, after mutative scale rasterizing, with new grid centre bit
Put and calculated, result of calculation represents the electromagnetic environment of whole grid region.
Technical scheme more than, beneficial effects of the present invention are：The present invention solves conventional grid division side
Grid sum caused by formula is excessive, amount of calculation is excessive, can not complete the problem of big region electromagnetic environment calculates, solution in a short time
Certainly conventional method yardstick is single, does not differentiate between during region electromagnetic environment calculates the problem of paying close attention to region and non-interesting region.It is flat
The area size that weighs and amount of calculation, meet the needs of to different zones needs different accuracy.Solve after large area rasterizing,
Grid is excessive, it is difficult to the problem of calculating.The present invention can also solve the problems, such as that electromagnetic environment calculates real-time simultaneously, can be in nothing
Voluntarily zoning electromagnetic environment in the case that people manipulates, it is not necessary to spend manpower to be investigated emerging radiation source, set
Put, substantially increase systematic difference.
Brief description of the drawings
The schematic diagram of yardstick rasterizing on the basis of Fig. 1.
Fig. 2 is mutative scale rasterizing example 1.
Fig. 3 is mutative scale rasterizing example 2.
Fig. 4 is that electromagnetic environment monitors process chart in real time.
Embodiment
With reference to Figure of description, embodiment of the invention is described in detail.
Fig. 1 is the schematic diagram of benchmark rasterizing of the prior art.By region to be monitored according to benchmark grid
Change, obtained result is as shown in figure 1, according to survey region size, regional environment（Including landform, building, woods etc.）Generalization
Demand, computing capability etc. consider the rasterizing scale size of formulation.Generally, benchmark rasterizing pair will be used
Region electromagnetic environment is calculated, and the electromagnetism ring of whole grid region is represented with the result of calculation of grid centre coordinate position
Border.
Described mutative scale rasterizing, it is for paying close attention to region or non-interesting region, part survey region being done more
The division for becoming more meticulous or changing more roughly.Mutative scale rasterizing is on benchmark rasterizing basis, is by some benchmark
With new yardstick, row divides again after yardstick grid subdivides or merges adjacent multiple benchmark grids.Mutative scale rasterizing
Afterwards, still using grid center as calculating parameter, result of calculation represents the electromagnetic environment of whole grid region.
In practical application, if the region of research is larger or in order to reduce operand, it is more careful can will to pay close attention to region use
Rasterizing yardstick calculated, the rough rasterizing yardstick in the region of non-interesting, with EQUILIBRIUM CALCULATION FOR PROCESS area size and operand
Between contradiction.
Grid after mutative scale rasterizing, using radiation source and the grid line of centres as direct projection propagation path, find, calculate electricity
Magnetic is propagated through grid and does shadowing, if grid of the ray after mutative scale rasterizing, uses amended grid pair
The geographical environment information answered.
As shown in Fig. 2 the region covered by black surround is emphasis region-of-interest, the area is entered with finer rasterizing yardstick
Row division, obtains more careful grid, to meet the special needs of user.
As shown in figure 3, it is non-interesting region by the region of tree-like mark covering, by the more rough rasterizing yardstick in the area
Calculated, to reduce amount of calculation.
Therefore, the invention discloses a kind of mutative scale gridding method calculated for region electromagnetic environment, its specific bag
Include following step：Region to be monitored is used into benchmark rasterizing, and area to be monitored is distinguished with reference to geographical environmental information
Region and non-interesting region are paid close attention in domain, region will be paid close attention to and divided with finer rasterizing yardstick, will
Non-interesting region is divided with more rough rasterizing yardstick；After mutative scale rasterizing, carried out with new grid center
Calculate, result of calculation represents the electromagnetic environment of whole grid region.The selection of specific standard scale and which kind of specifically uses
More careful or rough rasterizing yardstick is flexibly selected as needed, herein without limiting.By the above method,
Distinguished in region to be monitored and pay close attention to region and non-interesting region, both met user for paying close attention to region more
The needs of careful differentiation, reduce amount of calculation again.
Further, it is electric in order in the case where not knowing radiation source parameter in advance, can also carry out region
The calculating of magnetic environment, the invention also discloses a kind of electromagnetic environment method of real-time, and it specifically includes following step：Step
First, multiple monitoring points are set in the region for needing to monitor field strength, the quantity of monitoring point is come true according to area size, positioning method
Fixed, the monitoring point is used to monitor field strength in real time, and it is strong that the parameter for generally needing to measure includes signal frequency, reception signal
The parameters such as degree, and according to the difference of localization method, also need to measure the time difference or direction finding sometimes, which parametric technique specifically determined
Personnel can be set as needed, here without limiting；Step 2: the field strength monitored according to step 1, monitoring point
Position coordinates and the region geographical environment information, radiation source is positioned in real time, and calculate the transmitting of radiation source
Ray field strength；Concretely comprise the following steps：（1）Radiation source is positioned；（2）With reference to the position of each monitoring point and the radiation source position of determination
Put, calculate the signal propagation path between each monitoring point and radiation source respectively, including direct path, reflection path and around rays
Footpath；（3）The propagation attenuation of signal composite signal at monitoring point of different propagateds is calculated, and combines connecing for monitoring point measurement
Receive signal intensity, radiant power of the estimation radiation source on radiation source to each monitoring point direction；（4）With reference to radiation source to each
Radiant power on the direction of monitoring point, the transmission power of comprehensive assessment radiation source, such as the radiation source using omnidirectional antenna
, for the radiation source using directional aerial, priori directional diagram can be combined by the use of the mean power in all directions as radiant power,
Radiant power is estimated by the way of fitting.Step 3: what the radiation source parameter and needs that are calculated according to step 2 monitored
The geographical environment information in region calculates the electromagnetic environment distribution situation in region to be monitored.Pass through above-mentioned steps, it is not necessary in advance
Know that radiation source parameter can also monitor electromagnetic environment distribution situation in real time, solve to electromagnetism caused by non-formula radiation source
Environment computational problem, also saves human cost.This method can in the case of unmanned manipulation voluntarily zoning electromagnetic environment,
Manpower need not be spent to be investigated emerging radiation source, set, substantially increase application.Electricity as shown in Figure 4
Magnetic environment monitors process chart in real time, and it includes following several steps：Positioning and the radiation source spoke of radiation source are carried out first
The extraction of parameter is penetrated, then the geographical environment information known to determines electromagnetic wave propagation path, according to electromagnetic wave in difference
Decremeter under propagation path calculates the field strength of diverse location point.
Further, above-mentioned is specially to be determined using positioning using TDOA or cross bearing to radiation source progress positioning in real time
The position of radiation source.At least need three monitoring points using positioning using TDOA, and it is high-precision between each monitoring point when unite, monitoring point is pressed
Require to be distributed according to positioning using TDOA, depending on actual application environment, side can also be distributed in distributed areas surrounding；It is fixed using intersecting
Position at least needs two monitoring points, and each monitoring point need to have direction-measuring function, monitoring location is determined according to actual application environment.
Further, above-mentioned steps three specifically include：（a）The radiation source after positioning is found out with reference to geographical environmental information
Electromagnetic wave propagation path；（b）Geographical environment is divided into multiple receiving points, the ground is calculated according to different propagation paths
Manage the field strength of each receiving point in environment.Geographical environment is divided into multiple receiving points, according to the parameter and geography of radiation source
Information can quickly calculates the field strength of each receiving point, to real-time monitor the electromagnetism in environment.
Further, above-mentioned steps（a）Specifically include the judgement of direct projection propagation path, the lookup of reflected propagation paths with
And the lookup in diffraction propagation path.The judgement of direct projection propagation path：
Direct projection propagation path is with reference to the position of radiation source, the position of receiving device and geographical environment information, judges to radiate
Whether blocked between source and receiving device by objects such as the buildings in environment, if direct projection be present.
The lookup of reflected propagation paths
If signal is blocked, it can be reflected in block surface, reflected propagation paths are to combine reflecting surface, search radiation source and close
In the mirror point of reflecting surface, with mirror point as new starting point, the propagation road of indirect ray is determined according to direct projection circulation way
Footpath.Situations such as being divided into primary event, secondary reflection again is propagated in reflection, when multiple reflections are that indirect ray is blocked again, passes through
The mode for finding mirror point again determines the propagation path of every secondary reflection respectively.
The lookup in diffraction propagation path
Diffraction occurs in the edge of the objects such as building, occurs the region of diffraction and based on decay can be carried out by diffraction theory
Calculate.Diffraction is divided into situations such as diffraction, second time diffraction, and multiple diffraction occurs the propagation path after diffraction and again passes by object
During edge, multiple diffraction is by according to diffraction theory repeatedly calculate to determine.
Situations such as reflection, diffraction, can mix generation, as the propagation path of radiation source to receiving device may include once
Diffraction and primary event, now calculated successively according to the order of occurrence of reflection, diffraction in ray communication process.
Further, above-mentioned steps（b）Specifically include：Direct projection, diffraction and/or the reflection on per paths are calculated respectively
Propagation attenuation, and the field strength obtained on every paths is overlapped, so as to obtain the field strength of each receiving point.
Direct projection field decay calculates fundamental formular：
Wherein,For divergent-ray field strength,For the ray diffusion path length of direct wave receiving point,For wavelength.
Mirror fieldAnd diffraction fieldBasic calculating formula be：
Wherein,、The respectively invasin of back wave and diffracted wave, R, D are respectively reflectance factor and diffraction system
Number.
The field strength obtained to every propagation path of calculating is overlapped, and tries to achieve total intensity
The field strength of the receiving point can be obtained.
The invention also discloses a kind of electromagnetic environment real-time monitoring system, and it specifically includes monitoring point and computing unit, institute
State monitoring point and electromagnetic surveying instrument is set, for monitoring the electromagnetic field of the location point；The computing unit is used for the value according to monitoring
And geographical environment information calculates the position of radiation source and the emission parameter of radiation source, and combined according to the radiation source calculated
Geographical location information calculates the field strength of receiving point.
Pass through said system, it is only necessary to set monitoring point can directly to calculate radiation source, it is not necessary to know spoke in advance
The position and parameter can for penetrating source automatically derive, convenient for users to use.
The coefficient and parameter gone out given in the above embodiments, it is available to those skilled in the art to realize or use
Invention, invention, which does not limit, only takes foregoing disclosed numerical value, in the case where not departing from the thought of invention, the technology of this area
Personnel can make various modifications or adjustment to above-described embodiment, thus the protection domain invented is not by above-described embodiment institute
Limit, and should be the maximum magnitude for meeting the inventive features that claims are mentioned.
Claims (8)
1. a kind of mutative scale gridding method calculated for region electromagnetic environment, it specifically includes following step：It will wait to supervise
Survey region and use benchmark rasterizing, and with reference to geographical environmental information distinguish in region to be monitored pay close attention to region with
Non-interesting region, region will be paid close attention to and divided with finer rasterizing yardstick, non-interesting region used more rough
Rasterizing yardstick is divided；After mutative scale rasterizing, calculated with new grid center, result of calculation represents whole
The electromagnetic environment of grid region；
Methods described also includes：Step 1: setting multiple monitoring points in the region for needing to monitor field strength, the monitoring point is used for
Monitoring field strength in real time；Step 2: the field strength monitored according to step 1, the position coordinates of monitoring point and the geographical ring in the region
Environment information, radiation source is positioned in real time, and calculate the transmission power of radiation source；Step 3: calculated according to step 2
Radiation source parameter and the geographical environment information in region that needs to monitor calculate the electromagnetic environment distribution feelings in region to be monitored
Condition；
Wherein step 2 specifically includes following step：(1) radiation source is positioned；(2) combine each monitoring point position and really
Fixed radiation source positions, calculate the signal propagation path between each monitoring point and radiation source respectively, and the propagation path includes
Direct path, reflection path and diffraction path；(3) propagation of signal composite signal at monitoring point of different propagateds is calculated
Decay, and the received signal strength of monitoring point measurement is combined, estimate the radiant power on radiation source to each monitoring point direction；
(4) radiant power on radiation source to each monitoring point direction, the transmission power of comprehensive assessment radiation source are combined.
2. the mutative scale gridding method calculated as claimed in claim 1 for region electromagnetic environment, it is characterised in that described
Positioning is specially that the position of radiation source is determined using positioning using TDOA or cross bearing.
3. the mutative scale gridding method calculated as claimed in claim 1 for region electromagnetic environment, it is characterised in that described
Step 3 specifically includes：(a) the electromagnetic wave propagation path of the radiation source after positioning is found out with reference to geographical environmental information；(b)
Geographical environment is averagely divided into multiple receiving points, each receiving point in the geographical environment is calculated according to different propagation paths
Field strength.
4. the mutative scale gridding method calculated as claimed in claim 3 for region electromagnetic environment, it is characterised in that described
Step
(a) propagation path in specifically includes the judgement of direct projection propagation path, the lookup of reflected propagation paths and diffraction propagation
The lookup in path.
5. the mutative scale gridding method calculated as claimed in claim 3 for region electromagnetic environment, it is characterised in that described
Step
(b) specifically include：Direct projection, diffraction and/or the reflection propagation attenuation often on paths are calculated respectively, and will be often on paths
Obtained field strength is overlapped, so as to obtain the field strength of each receiving point.
6. the mutative scale gridding method calculated as claimed in claim 5 for region electromagnetic environment, it is characterised in that direct projection
The calculation formula of field decay is：Wherein, E0For divergent-ray field strength, d receives for direct wave
The ray diffusion path length of point, λ is wavelength.
7. the mutative scale gridding method calculated as claimed in claim 6 for region electromagnetic environment, it is characterised in that reflection
Field ErWith diffraction field EdCalculation formula be respectively：Er=E0×As×R×e-jkd, Ed=E0×Ad×D×e-jkd, wherein, As、Ad
The respectively invasin of back wave and diffracted wave, R, D are respectively reflectance factor and diffraction coefficient, and road is propagated to every of calculating
The field strength that footpath obtains is overlapped, and tries to achieve total intensity Etotal,The field strength of the receiving point can be obtained.
8. a kind of gridding method based on claim 1 and the mutative scale rasterizing system calculated for region electromagnetic environment,
It is characterized in that specifically include benchmark rasterizing unit, geographical environment information acquisition unit, judging unit, rasterizing yardstick
Updating block；The benchmark rasterizing unit is used to region to be monitored will be used into benchmark rasterizing；The geography
Nvironment information acquisition unit is used for the geographical environment information for obtaining region to be monitored；The judging unit is used for according to geographical environment
The information area separates in region to be monitored and pays close attention to region and non-interesting region；The rasterizing yardstick updating block is used for root
It is judged that the rasterizing yardstick in region and non-interesting region is paid close attention in the judged result renewal of unit, region use will be paid close attention to
Finer rasterizing yardstick is divided, and non-interesting region is divided with more rough rasterizing yardstick, mutative scale grid
After formatting, calculated with new grid center, result of calculation represents the electromagnetic environment of whole grid region.
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| CN111278041B (en) * | 2018-12-05 | 2023-04-07 | 中国移动通信集团甘肃有限公司 | Method and equipment for determining group behavior place |
| CN110531246B (en) * | 2019-08-09 | 2022-11-11 | 晶晨半导体（深圳）有限公司 | Method for rapidly finding electrostatic weak link through grid method |
| CN110988498B (en) * | 2019-12-23 | 2022-02-11 | 湘潭大学 | Base station electromagnetic radiation prediction method for building dense area |
| CN113965270B (en) * | 2020-07-20 | 2023-08-22 | 华为技术有限公司 | EMF intensity control method and communication device |
| CN116577698B (en) * | 2023-07-06 | 2023-12-15 | 中铁第四勘察设计院集团有限公司 | Substation ground fault monitoring method based on electromagnetic field distribution |
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