CN102621423A - Shortwave composite field test method in multi-scattering-body environment - Google Patents
Shortwave composite field test method in multi-scattering-body environment Download PDFInfo
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- CN102621423A CN102621423A CN2012100894838A CN201210089483A CN102621423A CN 102621423 A CN102621423 A CN 102621423A CN 2012100894838 A CN2012100894838 A CN 2012100894838A CN 201210089483 A CN201210089483 A CN 201210089483A CN 102621423 A CN102621423 A CN 102621423A
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Abstract
The invention provides a shortwave composite field test method in a multi-scattering-body environment. A composite frequency combination method is provided according to an energy stacking relationship of a composite field, so that the test of the composite field is performed in a maximal simulation radio frequency environment; aiming at a resonance effect of a metal substance in an electromagnetic environment, two test methods are adopted to capture a comprehensive electromagnetic effect of the shortwave composite electromagnetic environment for a sensitive metal device on an electric large-sized metal plane, and a larger value is used as an external electromagnetic environmental value for evaluating electromagnetic environmental adaptability of the sensitive metal device; and an evidence of an objective external environment is provided to the sensitive metal device, an industrial blank can be filled, and foundation is laid for the test and evaluation of the shortwave composite electromagnetic environment.
Description
Technical field
The invention belongs to the Electro Magnetic Compatibility field, be specifically related to compound method of testing of shortwave under a kind of multiple scattering body environment.
Background technology
The a plurality of short wave communication equipment acting in conjunction meetings that are operated in different frequency form the shortwave composite electromagnetic environment.Be in multiple complex effects such as the sensitive metal device can block the space electromagnetic environment generation on the TV university size metal flat under this environment, reflection, diffraction; At the special frequency of part (resonance frequency); The sensitive metal device is because the different EMR electromagnetic resonance effect that complicacy can occur; Cause the electromagnetic intensity of subregion to strengthen or weaken, influence is to the assessment of sensitive metal device Electromgnetic seat property.When multiple antenna was launched the compound field of formation simultaneously, the field was complicated more with the interaction meeting of metal device.
At present, be all the defy capture valid data of the comprehensive galvanomagnetic effect of this type of electromagnetic field numerical value emulation method or method of testing.Electromagnetic complicated communication process is embodied in above the numerical method, then is that the condition of discrete matrix equation is bad, and the iteration convergence of equation is not even convergence slowly.And all at present electromagnetic field numerical simulation software all can't realize being operated in many aerial radiations property calculation of different frequent points.Adopt traditional single game measuring method also to be difficult to obtain compound efficiency test data.Space electromagnetic environment is in close relations with the measurement result and the measuring method of comprehensive electromagnetic environmental effects.Sensitive metal device periphery electromagnetic environment is the comprehensive effect that many radiation sources are launched simultaneously, and the factor that compound field measurement need be considered will be far longer than single game and measure, and the test difficult point mainly can reduce following two aspects:
(1) compound test frequency chooses.The test of phantom order radiation field of aerial is
individual test frequency altogether.During the multi-section aerial radiation, different group of frequencies credit unions produces different compound field distribution characteristics.For example; The compound field frequencies range combination of two slave antennas has
plants, be single antenna
doubly.Therefore, accomplish the test of fullest like how the shortest time and minimum action scale, the maximum compound field distribution characteristic of obtaining around the device of sensitive metal is one of difficult point.
(2) the catching of the comprehensive galvanomagnetic effect of sensitive metal device on compound and the TV university size metal flat.Under compound situation, the sensitive metal device is different from single game with the interaction of field.Antenna is operated in different frequencies, and device difform annex in sensitive metal can produce complicated resonance effect.This effect is relevant with the multiple factors such as relative position of combination frequency, resonance effect, sensitive metal device and the radiation source of radiation source.Therefore, how choosing the test operating mode, to catch sensitive metal device compound main distribution characteristics of living in be two of difficult point.
At present, all do not mention the test and the appraisal procedure of shortwave composite electromagnetic environment in domestic and international relevant criterion and the document.How catching and assess sensitive metal device space electromagnetic environment of living in and produce the interaction value with external electromagnetic field, is a key issue that must solve in sensitive metal device electromagnetic environment test and the assessment.
The mentioned TV university size of the present invention is to adopt wavelength to weigh the size of object; When physical size then is considered to the TV university size greater than 1 wavelength; Then be considered to electric small-size when physical size is far smaller than 1 wavelength, the wavelength here equals the light velocity divided by the operating frequency of antenna that is operated on the metal flat.
Summary of the invention
The technical matters that the present invention will solve is: compound method of testing of shortwave under a kind of multiple scattering body environment is provided, can catches and assess device comprehensive galvanomagnetic effect in sensitive metal on the TV university size metal flat.
The present invention solves the problems of the technologies described above the technical scheme of being taked to be: compound method of testing of shortwave under a kind of multiple scattering body environment, and it is characterized in that: it may further comprise the steps:
1), confirms the combination of antennas scheme of shortwave composite electromagnetic environment and sensitive metal device effect test according to device residing position in sensitive metal on the layout characteristics of short-wave antenna and the TV university size metal flat;
2) central point of choosing the sensitive metal device is participated in the short-wave antenna of compound test and is worked respectively as test point, measures the frequency response curve of test point, i.e. the electric field intensity of corresponding each frequency of operation:
The test point frequency response curve that obtains when launching according to different antennae is chosen the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level, as the emitting antenna frequency of operation that forms the maximum composite electromagnetic environment of sensitive metal device central spot;
Sensitive metal device integral body is placed in the test zone; Make up according to said frequencies; Carry out under the maximum composite electromagnetic environment in shortwave space; Sensitive metal device group effect test is measured the sensitive metal device under the maximum composite electromagnetic environment in above-mentioned shortwave space, the electric field intensity of each responsive annex in the device of sensitive metal;
3) choose on the device of sensitive metal each sensitive part as test point, and sensitive metal device integral body is placed in the test zone, participate in the short-wave antenna of compound test and work respectively, measure the frequency response curve of each test point;
The test point frequency response curve that obtains when launching according to different antennae; Choose the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level; As the test frequency of the maximum composite electromagnetic environment test of each sensitive part of sensitive metal device, measure the compound field intensity of sensitive metal each sensitive part of device;
4) relatively sensitive metal each sensitive part of device in step 2) with 3) two kinds of composite electromagnetic environments electric field intensity value of measurement down, value that will be bigger is as assessing the adaptive external electromagnetic environment value of sensitive metal device electromagnetic environment.
Press such scheme, described step 2) guaranteeing under the constant situation of every secondary emitting antenna tuning state the electric field intensity of test point, i.e. single game when measuring every slave antenna and launching separately according to selected test frequency; According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiate compound field test value whether in fiducial interval, not in fiducial interval, then need this step of repetition.
Press such scheme, the frequency of operation that the every secondary emitting antenna of described step 3) is chosen is different, if the corresponding frequency of operation of two secondary emitting antenna maximum field intensity levels is identical, then wherein the frequency of operation chosen of common antenna must skew at least 5%.
Press such scheme, described step 3) guaranteeing under the constant situation of every secondary emitting antenna tuning state, the electric field intensity of test point, i.e. single game when measuring every slave antenna and launching separately according to the test frequency of choosing; According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiates compound field test value whether in fiducial interval, as if not in fiducial interval, then need this step of repetition.
Press such scheme, when measuring the electric field intensity of test point, adopt a some fixation measuring method, avoid the measuring position trace to change influence compound field test data; To each test point, after the machine stable working state to be launched, continuous sampling in 15 seconds is with the electric field intensity of the peak value in 15 seconds as this measuring point, to reduce the lag-effect of electric current.
Press such scheme, described single game and compound relational expression do
Wherein
is the compound field intensity that
secondary short-wave antenna is worked simultaneously and formed,
be the electric field intensity that
slave antenna work forms.
Beneficial effect of the present invention is:
1, according to compound energy overlaying relation, proposed the combination frequency combined method, guaranteed that compound field measurement is in simulation maximum radio frequency environment, to carry out;
2, to the resonance effect of metal object in electromagnetic environment; Adopt two kinds of method of testings to catch the shortwave composite electromagnetic environment to device comprehensive galvanomagnetic effect in sensitive metal on the TV university size metal flat, value that will be bigger is as the adaptive external electromagnetic environment value of assessment sensitive metal device electromagnetic environment;
3, the present invention has remedied the blank in this field, for the test and the assessment of shortwave composite electromagnetic environment are laid a good foundation for the sensitive metal device provides the foundation of objective external environment condition.
Description of drawings
Fig. 1 is the layout synoptic diagram of short-wave antenna on the TV university size metal flat and sensitive metal device.
Fig. 2 is short-wave antenna and sensitive metal device relative position synoptic diagram on the TV university size metal flat.
The frequency response curve of test point when Fig. 3 works independently for the 2# antenna.
The frequency response curve of test point when Fig. 4 works independently for the 3# antenna.
The frequency response curve of test point when Fig. 5 works independently for the 4# antenna.
Fig. 6 is sensitive metal device to test point arrangenent diagram on the TV university size metal flat.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing.
Compound method of testing of shortwave under a kind of multiple scattering body environment may further comprise the steps:
1), confirms the combination of antennas scheme of shortwave composite electromagnetic environment and sensitive metal device effect test according to device residing position in sensitive metal on the layout characteristics of short-wave antenna and the TV university size metal flat.
As illustrated in fig. 1 and 2, suppose and arranged ten secondary short-wave antenna 1-10 and 1 sensitive metal device 12 on the TV university size metal flat 11.Because compound amplitude is relevant to the distance of emitting antenna with test point.The multi-section antenna is worked simultaneously, and the near more emitting antenna of distance test point is contributed big more to the electric field intensity of this point.The layout characteristics of analysis-by-synthesis Fig. 1 and 2 medium short wave antenna and to compound " contribution " magnitude; Three slave antennas are launched the composite electromagnetic environment distribution characteristics that can reflect TV university size metal flat basically simultaneously, confirm to choose three slave antennas and carry out the while emission test.According to the residing position of sensitive metal device, confirm that the combination of antennas scheme is that 2#, 3# and 4# antenna 2-4 launch simultaneously.
2) central point of choosing the sensitive metal device is participated in the short-wave antenna of compound test and is worked respectively as test point, measures the frequency response curve of test point, i.e. the electric field intensity of corresponding each frequency of operation; The test point frequency response curve that obtains when launching according to different antennae is chosen the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level, as the emitting antenna frequency of operation that forms the maximum composite electromagnetic environment of sensitive metal device central spot; Sensitive metal device integral body is placed in the test zone; Make up according to said frequencies; Carry out under the maximum composite electromagnetic environment in shortwave space; Sensitive metal device group effect test is measured the sensitive metal device under the maximum composite electromagnetic environment in above-mentioned shortwave space, the electric field intensity of each responsive annex in the device of sensitive metal.
Guaranteeing under the constant situation of every secondary emitting antenna tuning state the electric field intensity of test point, i.e. single game when measuring every slave antenna and launching separately according to selected test frequency; According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiate compound field test value whether in fiducial interval, not in fiducial interval, then need this step of repetition.The electric field intensity of test point when single game refers to that every slave antenna is launched separately according to the test frequency of choosing.
Single game and compound relational expression are
; Wherein
is the compound field intensity that
secondary short-wave antenna is worked simultaneously and formed,
be the electric field intensity that
slave antenna work forms.
In the present embodiment, three secondary short-wave antennas are worked respectively, test point is tested in the electric field intensity of each frequency of operation, and draw out frequency response curve.The frequency response curve of supposing test point when the 2# antenna works independently is as shown in Figure 3, and the frequency response curve of test point was as shown in Figure 4 when the 3# antenna worked independently, and the frequency response curve of test point was as shown in Figure 5 when the 4# antenna worked independently.
According to the frequency response curve of test point, choose the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level, as the emitting antenna frequency of operation that forms the maximum composite electromagnetic environment of sensitive metal device central spot.As shown in Figure 3, with
as the test frequency of 2# antenna; As shown in Figure 4, with
as the test frequency of 3# antenna; As shown in Figure 5, with
as the test frequency of 4# antenna.Suppose
, then
,
and
need satisfy relational expression
and
; if
; The test frequency of 2# antenna is adjusted into
or
, and satisfies relational expression
and
; if
; The test frequency of 3# antenna is adjusted into
or
, and satisfies relational expression
and
; if
; The test frequency that the test frequency of 2# antenna is adjusted into
, 3# antenna is adjusted into
, or the test frequency that the test frequency of 2# antenna is adjusted into
, 3# antenna is adjusted into
.
Sensitive metal device integral body is placed in the test zone,, carry out under the maximum composite electromagnetic environment in shortwave space the test of sensitive metal device group effect according to the said frequencies combination.Adopt a some fixation measuring method, measure the sensitive metal device under above-mentioned TV university size metal flat space compound electromagnetic environment, the electric field intensity of sensitive metal each responsive annex of device.For each measuring point, after the machine stable working state to be launched, continuous sampling in 15 seconds is with the electric field intensity of the peak value in 15 seconds as this measuring point, to reduce the lag-effect of electric current.Guaranteeing under the constant situation of every secondary emitting antenna tuning state the electric field intensity of test point when measuring every slave antenna and launching separately according to the test frequency of choosing.According to the relational expression of single game and compound field, analyze the difference between compound test value and the calculated value.Relational expression is
; Wherein
is the compound field intensity that
secondary short-wave antenna is worked simultaneously and formed,
be the electric field intensity that
slave antenna work forms.
3) choose on the device of sensitive metal each sensitive part as test point, and sensitive metal device integral body is placed in the test zone, participate in the short-wave antenna of compound test and work respectively, measure the frequency response curve of each test point; The test point frequency response curve that obtains when launching according to different antennae; Choose the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level; As the test frequency of the maximum composite electromagnetic environment test of each sensitive part of sensitive metal device, measure the compound field intensity of sensitive metal each sensitive part of device.
The frequency of operation that every secondary emitting antenna is chosen is different, if the corresponding frequency of operation of two secondary emitting antenna maximum field intensity levels is identical, then wherein the frequency of operation chosen of common antenna must skew at least 5%.
In the present embodiment, suppose and chosen on the device of sensitive metal four sensitive parts that as shown in Figure 6, the test point numbering is respectively A, B, C, D as test point.Sensitive metal device integral body is placed in the test zone.Participate in the short-wave antenna of compound test and work respectively, measure the frequency response curve of each test point.Suppose the emission of 2# antenna, four corresponding frequency of operation of test point maximum field intensity level are respectively
,
,
,
; The emission of 3# antenna, four corresponding frequency of operation of test point maximum field intensity level are respectively
,
,
,
; The emission of 4# antenna, four corresponding frequency of operation of test point maximum field intensity level are respectively
,
,
,
.The test point frequency response curve that obtains when launching according to different antennae is chosen the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level, as the test frequency of the maximum composite electromagnetic environment test of each sensitive part of sensitive metal device.With test point A is example, and 2#, 3#, 4# antenna are chosen frequency of operation
,
,
respectively as compound test frequency.The frequency of operation that every secondary emitting antenna is chosen should be different.If the frequency of operation that two secondary emitting antennas are chosen is identical, then wherein the frequency of operation of a width of cloth antenna must squint 5% at least.Adopt a some fixation measuring method, measure the electric field intensity of sensitive metal each sensitive part of device.For each measuring point, after the machine stable working state to be launched, continuous sampling in 15 seconds is with the electric field intensity of the peak value in 15 seconds as this measuring point, to reduce the lag-effect of electric current.
Guaranteeing under the constant situation of every secondary emitting antenna tuning state the electric field intensity of test point when measuring every slave antenna and launching separately according to the test frequency of choosing.According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiate compound field test value whether in fiducial interval.If differing greatly between compound field test value and the calculated value not in fiducial interval, then needs this step of repetition.
4) relatively sensitive metal each sensitive part of device in step 2) with 3) two kinds of composite electromagnetic environments electric field intensity value of measurement down, value that will be bigger is as assessing the adaptive external electromagnetic environment value of sensitive metal device electromagnetic environment.Two kinds of composite electromagnetic environments are respectively the maximum composite electromagnetic environments of sensitive part on maximum composite electromagnetic environment of sensitive metal device central spot and the sensitive metal device.
Claims (6)
1. compound method of testing of shortwave under the multiple scattering body environment, it is characterized in that: it may further comprise the steps:
1), confirms the combination of antennas scheme of shortwave composite electromagnetic environment and sensitive metal device effect test according to device residing position in sensitive metal on the layout characteristics of short-wave antenna and the TV university size metal flat;
2) central point of choosing the sensitive metal device is participated in the short-wave antenna of compound test and is worked respectively as test point, measures the frequency response curve of test point, i.e. the electric field intensity of corresponding each frequency of operation;
The test point frequency response curve that obtains when launching according to different antennae is chosen the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level, as the emitting antenna frequency of operation that forms the maximum composite electromagnetic environment of sensitive metal device central spot;
Sensitive metal device integral body is placed in the test zone; Make up according to said frequencies; Carry out under the maximum composite electromagnetic environment in shortwave space; Sensitive metal device group effect test is measured the sensitive metal device under the maximum composite electromagnetic environment in above-mentioned shortwave space, the electric field intensity of each responsive annex in the device of sensitive metal;
3) choose on the device of sensitive metal each sensitive part as test point, and sensitive metal device integral body is placed in the test zone, participate in the short-wave antenna of compound test and work respectively, measure the frequency response curve of each test point;
The test point frequency response curve that obtains when launching according to different antennae; Choose the corresponding frequency of operation of every secondary emitting antenna maximum field intensity level; As the test frequency of the maximum composite electromagnetic environment test of each sensitive part of sensitive metal device, measure the compound field intensity of sensitive metal each sensitive part of device;
4) relatively sensitive metal each sensitive part of device in step 2) with 3) the electric field intensity value measured under two kinds of electromagnetic environments, value that will be bigger is as assessing the adaptive external electromagnetic environment value of sensitive metal device electromagnetic environment.
2. compound method of testing of shortwave under the multiple scattering body environment according to claim 1; It is characterized in that: described step 2) guaranteeing under the constant situation of every secondary emitting antenna tuning state; The electric field intensity of test point, i.e. single game when measuring every slave antenna and launching separately according to selected test frequency; According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiate compound field test value whether in fiducial interval, not in fiducial interval, then need this step of repetition.
3. compound method of testing of shortwave under the multiple scattering body environment according to claim 1; It is characterized in that: the frequency of operation that the every secondary emitting antenna of described step 3) is chosen is different; If the frequency of operation that two secondary emitting antenna maximum field intensity levels are corresponding is identical, then wherein the frequency of operation chosen of common antenna must skew at least 5%.
4. compound method of testing of shortwave under the multiple scattering body environment according to claim 1; It is characterized in that: described step 3) is guaranteeing under the constant situation of every secondary emitting antenna tuning state; The electric field intensity of test point, i.e. single game when measuring every slave antenna and launching separately according to the test frequency of choosing; According to single game and compound relational expression, analyzes the difference between compound test value and the calculated value, differentiates compound field test value whether in fiducial interval, as if not in fiducial interval, then need this step of repetition.
5. according to compound method of testing of shortwave under any described multiple scattering body environment in the claim 1 to 4; It is characterized in that: when measuring the electric field intensity of test point; Adopt a some fixation measuring method, avoid the measuring position trace to change influence compound field test data; To each test point, after the machine stable working state to be launched, continuous sampling in 15 seconds is with the electric field intensity of the peak value in 15 seconds as this measuring point, to reduce the lag-effect of electric current.
6. according to compound method of testing of shortwave under claim 2 or the 4 described multiple scattering body environment, it is characterized in that: described single game and compound relational expression do
Wherein
is the compound field intensity that
secondary short-wave antenna is worked simultaneously and formed,
be the electric field intensity that
slave antenna work forms.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266211A (en) * | 1998-03-17 | 1999-09-28 | Kokusai Electric Co Ltd | Electromagnetic field environment characteristic evaluation system for radio terminal equipment |
| CN101295019A (en) * | 2008-05-23 | 2008-10-29 | 北京航空航天大学 | Simulation method of linear frequency modulation continuous wave synthetic aperture radar video signal |
| CN101394672A (en) * | 2008-10-30 | 2009-03-25 | 上海大学 | High precision wireless positioning method and system based on multipath dispersion information |
| CN101520482A (en) * | 2009-03-31 | 2009-09-02 | 北京航空航天大学 | Electromagnetic radiation sensitivity testing method for increasing test precision |
-
2012
- 2012-03-30 CN CN2012100894838A patent/CN102621423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11266211A (en) * | 1998-03-17 | 1999-09-28 | Kokusai Electric Co Ltd | Electromagnetic field environment characteristic evaluation system for radio terminal equipment |
| CN101295019A (en) * | 2008-05-23 | 2008-10-29 | 北京航空航天大学 | Simulation method of linear frequency modulation continuous wave synthetic aperture radar video signal |
| CN101394672A (en) * | 2008-10-30 | 2009-03-25 | 上海大学 | High precision wireless positioning method and system based on multipath dispersion information |
| CN101520482A (en) * | 2009-03-31 | 2009-09-02 | 北京航空航天大学 | Electromagnetic radiation sensitivity testing method for increasing test precision |
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