CN105606905A - Electromagnetic radiation monitor with weighting function - Google Patents
Electromagnetic radiation monitor with weighting function Download PDFInfo
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- CN105606905A CN105606905A CN201610207348.7A CN201610207348A CN105606905A CN 105606905 A CN105606905 A CN 105606905A CN 201610207348 A CN201610207348 A CN 201610207348A CN 105606905 A CN105606905 A CN 105606905A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0857—Dosimetry, i.e. measuring the time integral of radiation intensity; Level warning devices for personal safety use
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Abstract
The invention provides an electromagnetic radiation monitor with a weighting function. The electromagnetic radiation monitor comprises an antenna, a weighting filter, an RMS detector and a master controller, wherein the antenna is used for collecting an electromagnetic radiation signal in a target measuring environment; the weighting filter is electrically connected with the antenna and is used for performing corresponding standard limiting value attenuation on the electromagnetic radiation signal according to a self-stored preset frequency spectrum curve; the RMS detector is electrically connected with the weighting filter and is used for performing conversion treatment on the electromagnetic radiation signal after being attenuated; and the master controller is electrically connected with the RMS detector and is used for performing conversion treatment on a direct current voltage signal acquired after the conversion treatment, thereby acquiring an assessment result. The weighting filter is adopted for realizing the frequency-based assessment for the detected electromagnetic radiation signal. The frequency spectrum curve of the weighting filter is related to the curve of the standard limiting value on the frequency, so that the corresponding standard limiting value attenuation can be performed on the passing electromagnetic radiation signal, the detection result of the electromagnetic radiation is more accurate, no worker participates into the whole process and the detection efficiency of the electromagnetic radiation is increased.
Description
Technical field
The present invention relates to electromagnetic radiation monitoring field, there is weighted in particular to oneThe electromagnetic radiation monitoring instrument of function.
Background technology
In electromagnetic radiation monitoring, need to assess tested electromagnetic field signal, to judgeWhether the electromagnetic radiation in current test environment exceeds standard. And in evaluation criterion, based on frequencyA normally curve of limit value, the limit value that is to say different frequency range is different.
Taking " electromagnetic environment control limit " (GB8702-2014) as example, the public electric field that exposes to the open airThe relation of control limit and frequency as shown in Figure 1. And requirement in the evaluation method of this standard,In the time that the public exposes to the open air at the electric field of multiple frequencies, magnetic field, elect magnetic field, evaluate public's correspondenceElectromagnetic field signal should consider electric field, the magnetic field of multiple frequencies, the control limit of electromagnetic fieldValue. Concrete, evaluate electromagnetic field signal and calculate monitor value (being tested electromagnetic field signal)Whether exceed standard, will calculate exactly the measured value of each frequency of tested electromagnetic field signal divided by this frequencyThe limit value of point, then, by the result of calculation summation of above-mentioned each frequency, sees that whether summed result is largeIn 1, judge that monitor value exceeds standard if be greater than 1.
For the above-mentioned method that tested electromagnetic field signal is assessed, prior art generally shouldCarry out electromagnetic radiation monitoring with comprehensive field intensity meter, gather tested electromagnetic field by comprehensive field intensity meterSignal, and tested electromagnetic field signal (as broadband field intensity signal) is carried out to detection processing,To detection result; Then whether exceed standard by manually calculating monitor value corresponding to detection result; AndIn the process of above-mentioned detection processing, detecting circuit depends on the total of whole broadband field intensity signalField intensity, comprehensive field intensity meter cannot obtain the field intensity of the each frequency of broadband signal, and due to standardThe limit value difference of limit value based on different frequency, so comprehensive field intensity meter gathers broadband field intensity,Cannot know primary radiation frequency, or have in the situation of multiple radiation frequencies, cannot carry out withThe comparison of limit value, thus the detection that need to manually exceed standard, and artificial exceeding standard detects meeting conventionallyUsing the limit value 12V/m of the strictest 30MHz-3000MHz frequency range of limit value as evaluation criterion,This is not rigorous. Especially when tested electromagnetic field signal is made up of multiple frequencies of electromagnetic radiation sourceTime, can cause estimation error.
Inventor finds under study for action, and comprehensive field intensity meter of the prior art is owing to knowingMultiple frequency ranges of the electromagnetic field signal of its collection, need manually to carrying out the super of electromagnetic field signalMark detects, and makes detection efficiency low; And the detection that manually exceeds standard is the assessment based on the strictestStandard, also makes assessment result accuracy poor.
Summary of the invention
The object of the present invention is to provide a kind of electromagnetic radiation monitoring instrument with weighted function,Low and improve the accuracy of electromagnet radiation detection result to improve the detection efficiency of electromagnetic radiation.
First aspect, the embodiment of the present invention provides a kind of electromagnetic radiation with weighted functionMonitor, comprising: antenna, weighted wave filter, root-mean-square value RMS wave detector and master controlDevice processed;
Antenna, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE of target measurement environment;
Weighted wave filter is connected with antenna electric, for the default spectrum curve of storing according to selfELECTROMAGNETIC RADIATION SIGNATURE is carried out to the decay of respective standard limit value, obtain the electromagnetic radiation after decaySignal;
RMS wave detector is electrically connected with weighted wave filter, for the electromagnetic radiation letter to after decayNumber carry out conversion process, obtain d. c. voltage signal;
Master controller is electrically connected with RMS wave detector, for d. c. voltage signal is changedCalculate and process, obtain the assessment result that ELECTROMAGNETIC RADIATION SIGNATURE is corresponding.
In conjunction with first aspect, the embodiment of the present invention provides the first of first aspect possibleEmbodiment, wherein, the default spectrum curve that weighted wave filter is stored according to self is to electromagnetismRadiation signal carries out the decay of respective standard limit value, comprising:
Weighted wave filter carries out respective standard according to following formula to the ELECTROMAGNETIC RADIATION SIGNATURE receivingThe decay of limit value: F (f)=20lg (EL)-1; Wherein, EL(f) be that electric field standard limited value is frequentlyFunction in rate; The attenuation that F (f) is ELECTROMAGNETIC RADIATION SIGNATURE.
In conjunction with the possible embodiment of the first of first aspect, the embodiment of the present invention providesThe possible embodiment of the second of first aspect, wherein, the attenuation coefficient of weighted wave filterFor
Adjust attenuation coefficient according to the resistance in weighted wave filter and electric capacity.
In conjunction with first aspect, the embodiment of the present invention provides the third of first aspect possibleEmbodiment, wherein, has the electromagnetic radiation monitoring instrument of weighted function, also comprises display;
Display is electrically connected with master controller, for assessment corresponding to receiving electromagnetic radiation signalAs a result, show assessment result.
In conjunction with the third possible embodiment of first aspect, the embodiment of the present invention providesThe 4th kind of possible embodiment of first aspect, wherein, has the electromagnetism spoke of weighted functionPenetrate monitor, also comprise operational amplifier and analog-digital converter;
Operational amplifier is electrically connected with RMS wave detector, for receiving d. c. voltage signal,D. c. voltage signal is carried out to operation amplifier processing, the d. c. voltage signal after being amplified;
Analog-digital converter is electrically connected with operational amplifier and master controller respectively, for to amplifyAfter d. c. voltage signal carry out analog-to-digital conversion process, obtain data signal.
In conjunction with the third possible embodiment or the 4th kind of possible enforcement side of first aspectFormula, the embodiment of the present invention provides the 5th kind of possible embodiment of first aspect, wherein,In the above-mentioned electromagnetic radiation monitoring instrument with weighted function, antenna comprises three, three antennasBe respectively used to gather the ELECTROMAGNETIC RADIATION SIGNATURE of X-axis, Y-axis and Z axis in target measurement environment,And export respectively ELECTROMAGNETIC RADIATION SIGNATURE.
In conjunction with the 5th kind of possible embodiment of first aspect, the embodiment of the present invention providesThe 6th kind of possible embodiment of first aspect, wherein, the above-mentioned electricity with weighted functionIn magnetic radiation monitor, weighted wave filter comprises three, and three weighted wave filters are respectively with threeThe corresponding electrical connection of individual antenna, for receiving respectively the electromagnetism spoke that X-axis, Y-axis and Z axis are correspondingPenetrate signal, the default spectrum curve of storing according to self carries out phase to three ELECTROMAGNETIC RADIATION SIGNATUREsAnswer the decay of standard limited value, the corresponding electromagnetic radiation of X-axis, Y-axis and Z axis after output attenuatoinSignal.
In conjunction with the 6th kind of possible embodiment of first aspect, the embodiment of the present invention providesThe 7th kind of possible embodiment of first aspect, wherein, the above-mentioned electricity with weighted functionMagnetic radiation monitor, also comprises: multiplier and adder;
Multiplier is electrically connected with three weighted wave filters respectively, for the X-axis after receiving attenuation,The corresponding ELECTROMAGNETIC RADIATION SIGNATURE of Y-axis and Z axis, carries out square three ELECTROMAGNETIC RADIATION SIGNATUREs respectivelyProcess, obtain three three square values that ELECTROMAGNETIC RADIATION SIGNATURE is corresponding;
Adder is electrically connected with multiplier and RMS wave detector respectively, for to three electromagnetismThree square values that radiation signal is corresponding processing of suing for peace, will obtain summed result and be sent toRMS wave detector.
In conjunction with the 7th kind of possible embodiment of first aspect, the embodiment of the present invention providesThe 8th kind of possible embodiment of first aspect, wherein, has the electromagnetism spoke of weighted functionPenetrate monitor, also comprise root circuit;
Root circuit is electrically connected with RMS wave detector and operational amplifier respectively, for receivingThe summed result that converts d. c. voltage signal to that RMS wave detector sends, enters summed resultThe processing of row evolution, the comprehensive electromagnetic radiation signal that the processing of output evolution obtains is to operational amplifier.
In conjunction with the 5th kind of possible embodiment of first aspect, the embodiment of the present invention providesThe 6th kind of possible embodiment of first aspect, wherein, the above-mentioned electricity with weighted functionMagnetic radiation monitor, also comprises probe; The integrated antenna that is provided with in probe;
When target measurement environment is during in near-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensitySignal and magnetic field intensity signal; Probe comprises electric field probe and magnet field probe; Electric field probe,For gathering the electric field intensity signal of target measurement environment X-axis, Y-axis and Z axis; Magnetic fieldProbe, for gathering the magnetic field intensity signal of target measurement environment X-axis, Y-axis and Z axis;
When target measurement environment is during in far-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensity;Probe comprises electric field probe; Electric field probe, for gathering target measurement environment X-axis, YThe electric field intensity signal of axle and Z axis.
A kind of electromagnetic radiation monitoring instrument with weighted function that the embodiment of the present invention provides, bagDraw together: antenna, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE of target measurement environment; Weighted wave filter,ELECTROMAGNETIC RADIATION SIGNATURE is carried out to the decay of respective standard limit value; RMS wave detector, for to decliningELECTROMAGNETIC RADIATION SIGNATURE after subtracting carries out conversion process, obtains d. c. voltage signal; Master controllerConnect, for processing that d. c. voltage signal is converted, obtain ELECTROMAGNETIC RADIATION SIGNATURE correspondenceAssessment result, with comprehensive field intensity meter of the prior art detection efficiency low and assessmentResult accuracy is poor to be compared, and it is by adopting weighted wave filter to realize tested electromagnetic field letterNumber carry out the assessment based on frequency, because spectrum curve and the standard limited value of weighted wave filter existCurvilinear correlation in frequency, therefore it can carry out respective standard limit to the ELECTROMAGNETIC RADIATION SIGNATURE passing throughValue decay, thereby make the testing result of electromagnetic radiation more accurate, and whole process withoutNeed artificial participation, improved the detection efficiency of electromagnetic radiation.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, cited below particularlyPreferred embodiment, and coordinate appended accompanying drawing, be described in detail below.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below will be to embodimentIn the accompanying drawing of required use be briefly described, should be appreciated that the following drawings only showsSome embodiment of the present invention, therefore should not be counted as the restriction to scope, for abilityTerritory those of ordinary skill, is not paying under the prerequisite of creative work, can also basisThese accompanying drawings obtain other relevant accompanying drawings.
Fig. 1 shows the public electric field controls limit value that exposes to the open air of one that the embodiment of the present invention providesSchematic diagram with frequency relation;
Fig. 2 shows a kind of electromagnetism spoke with weighted function that the embodiment of the present invention providesPenetrate the structural representation of monitor;
Fig. 3 shows the attenuation curve of a kind of weighted wave filter that the embodiment of the present invention providesCurvilinear correlation schematic diagram with standard limited value in frequency;
Fig. 4 shows the decay song of the another kind of weighted wave filter that the embodiment of the present invention providesLine and the standard limited value curvilinear correlation schematic diagram in frequency;
The another kind that Fig. 5 shows the embodiment of the present invention to be provided has the electromagnetism of weighted functionThe structural representation of radiation monitor;
Fig. 6 shows a kind of electromagnetism spoke with weighted function that the embodiment of the present invention providesPenetrate the overall structure schematic diagram of monitor;
The low frequency that Fig. 7 shows the embodiment of the present invention to be provided has the electromagnetism spoke of weighted functionPenetrate the schematic diagram of monitor function curve in frequency at the standard limited value of its low frequency frequency range;
The low frequency that Fig. 8 shows the embodiment of the present invention to be provided has the electromagnetism spoke of weighted functionPenetrate the schematic diagram of the attenuation curve of weighted wave filter in monitor.
Main element symbol description:
101, antenna; 102, weighted wave filter; 103, RMS wave detector; 104, master controlDevice processed; 105, display; 106, operational amplifier; 107, analog-digital converter; 108,Multiplier; 109, adder; 110, root circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present inventionCase is clearly and completely described, and obviously, described embodiment is only the present invention onePart embodiment, instead of whole embodiment. Conventionally in accompanying drawing, describe and illustrate hereinThe assembly of the embodiment of the present invention can arrange and design with various configuration. Therefore,Below the detailed description of the embodiments of the invention that provide in the accompanying drawings being not intended to restriction wantsAsk the scope of the present invention of protection, but only represent selected embodiment of the present invention. Based onEmbodiments of the invention, those skilled in the art are not making under the prerequisite of creative workThe every other embodiment obtaining, belongs to the scope of protection of the invention.
In the process that tested electromagnetic field signal is assessed, based on " electromagnetic environment controlLimit value " requirement in the evaluation method of standard, when the public exposes electric field, the magnetic in multiple frequencies to the open air, when elect magnetic field, should consider due to the electric field, magnetic field, electromagnetic field of multiple frequenciesExpose to the open air, to meet following requirement.
Between 1Hz～100kHz, should meet following relational expression:
And
In formula: Ei---the electric-field intensity of frequency i; EL, the electric-field intensity limit of i---frequency iValue; The magnetic induction intensity of Bi---frequency i; BL, the magnetic induction intensity limit value of i---frequency i.
Between 0.1MHz～300GHz, should meet following relational expression:
And
In formula: Ej---the electric-field intensity of frequency j; EL, the electric-field intensity limit of j---frequency jValue; The magnetic induction intensity of Bj---frequency j; BL, the magnetic induction intensity limit value of j---frequency j.
That is: whether calculate monitor value and exceed standard, be exactly that the measured value of each frequency is divided by this frequencyLimit value, then summation, see and whether be greater than 1, be just greater than and exceed standard. Wherein, at 1Hz～100kHzBetween, measured value using electric field intensity or magnetic induction intensity value, 0.1MHz～300GHz itBetween, measured value applied power density value.
And comprehensive field intensity meter of the prior art carry out above-mentioned exceed standard detect mode, be due toCannot know multiple frequency ranges of the electromagnetic field signal of its collection, need manually to carrying out electromagnetic fieldThe detection that exceeds standard of signal, makes detection efficiency low; And the detection that manually exceeds standard is based on the tightestThe evaluation criteria of lattice, also makes assessment result accuracy poor.
Based on the problems referred to above, the embodiment of the present invention provides a kind of electromagnetism with weighted functionRadiation monitor, with reference to figure 2, the above-mentioned electromagnetic radiation monitoring instrument with weighted function, bagDraw together: antenna 101, weighted wave filter 102, root-mean-square value RMS wave detector 103 and master controlDevice 104 processed;
Antenna 101, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE of target measurement environment;
Weighted wave filter 102 is electrically connected with antenna 101, default for what store according to selfSpectrum curve carries out the decay of respective standard limit value to ELECTROMAGNETIC RADIATION SIGNATURE, obtain after decayELECTROMAGNETIC RADIATION SIGNATURE;
RMS wave detector 103 is electrically connected with weighted wave filter 102, for the electricity to after decayMagnetic radiation signal carries out conversion process, obtains d. c. voltage signal;
Master controller 104 is electrically connected with RMS wave detector 103, for DC voltage is believedThe processing that number converts, obtains the assessment result that ELECTROMAGNETIC RADIATION SIGNATURE is corresponding.
A kind of electromagnetic radiation monitoring instrument with weighted function that the embodiment of the present invention provides, withComprehensive field intensity meter of the prior art detection efficiency is low and assessment result accuracy is poorCompare, its by adopt weighted wave filter 102 realize to tested electromagnetic field signal carry out based onThe assessment of frequency, because the spectrum curve of weighted wave filter 102 and standard limited value are in frequencyCurvilinear correlation, therefore it can carry out declining of respective standard limit value to the ELECTROMAGNETIC RADIATION SIGNATURE passing throughSubtract, thereby make the testing result of electromagnetic radiation more accurate, and whole process is without manuallyParticipate in, improved the detection efficiency of electromagnetic radiation.
Concrete, above-mentioned antenna 101 pops one's head in, and it can Real-time Collection target measurement environmentIn ELECTROMAGNETIC RADIATION SIGNATURE, ELECTROMAGNETIC RADIATION SIGNATURE is sent to weighted wave filter 102; Wherein,For different target measurement environment, the number difference of above-mentioned antenna 101.
Concrete, when target measurement environment is during in near-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprisesElectric field intensity signal and magnetic field intensity signal; Corresponding, above-mentioned probe comprises: electric field is visitedHead and magnet field probe; Electric field probe, for gathering the electric-field intensity letter of target measurement environmentNumber; Magnet field probe, for gathering the magnetic field intensity signal of target measurement environment.
When target measurement environment is during in far-field region, the general electric-field intensity letter of only need to measuringNumber, magnetic field intensity signal can be according to the preset relation in electric field and magnetic field to convertingElectric field intensity signal obtains; Therefore, corresponding, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensity;Probe comprises electric field probe; Electric field probe, for gathering the electric-field strength of target measurement environmentDegree signal.
Spectrum curve and the standard limited value of the above-mentioned weighted wave filter 102 in the embodiment of the present inventionCurvilinear correlation in frequency, makes antenna 101 output signals (being ELECTROMAGNETIC RADIATION SIGNATURE) logicalAfter wave filter, be just equivalent to signal to carry out the decay of respective standard limit value, then will decaySignal through RMS wave detector 103, the effect of RMS wave detector 103 is by receptionSignal convert d. c. voltage signal to; Finally, will be converted to by master controller 104The processing that converts of above-mentioned d. c. voltage signal, obtains the percentage based on standard limited value, andAssessment result corresponding to the corresponding ELECTROMAGNETIC RADIATION SIGNATURE of above-mentioned percentage. Now, staff canDirectly to view the assessment result of the electromagnetic radiation in target measurement environment, can judge prisonWhether measured value exceeds standard, above-mentioned whole process and without manually assessing, improved electromagnetismThe detection efficiency of radiation; And, the spectrum curve of above-mentioned weighted wave filter 102 and standard limitThe curvilinear correlation of value in frequency, therefore the ELECTROMAGNETIC RADIATION SIGNATURE by weighted wave filter 102Pad value, with respect to the mode of going to assess manually electromagnetic radiation with the strictest standard, makesObtain Sprint electromagnetic radiation evaluation result more accurate.
Further, in the above-mentioned electromagnetic radiation monitoring instrument with weighted function, above-mentioned weightedWave filter 102 carries out corresponding according to the default spectrum curve of self storage to ELECTROMAGNETIC RADIATION SIGNATUREThe decay of standard limited value, comprising:
Weighted wave filter 102 carries out corresponding according to following formula to the ELECTROMAGNETIC RADIATION SIGNATURE receivingThe decay of standard limited value: F (f)=20lg (EL)-1; Wherein, EL(f) be electric field standard limited valueFunction in frequency; The attenuation that F (f) is ELECTROMAGNETIC RADIATION SIGNATURE.
Concrete, realize the curve of above-mentioned weighted wave filter 102, weighted wave filter 102Transformational relation as shown in Figure 3 and Figure 4, wherein, EL(f) be that electric field standard limited value is in frequencyFunction, the conversion formula of weighted wave filter 102 is F (f)=20lg (EL)-1, i.e. filteringThe attenuation curve of device, the curvilinear correlation with standard limited value in frequency.
If tested field intensity value is E, the field intensity value after weighted is
V＝E*F(f)＝E*20lg(EL)-1
Be that tested field intensity is passed through weighted wave filter 102, be just equivalent to signal to carry out corresponding markThe decay of accurate limit value.
Further, in the above-mentioned electromagnetic radiation monitoring instrument with weighted function, weighted filteringThe attenuation coefficient of device 102 isIn the embodiment of the present invention, according to weighted wave filter 102In resistance and electric capacity adjust attenuation coefficient.
Even if the attenuation coefficient of wave filter equals the slope of F (f),And above-mentioned decayCoefficient can be adjusted by the parameter of adjusting resistance R, capacitor C, to reach requiredAttenuation coefficient.
Further, the above-mentioned electromagnetic radiation monitoring instrument with weighted function, with reference to figure 5,Also comprise display 105; Display 105 is electrically connected with master controller 104, for receivingThe assessment result that ELECTROMAGNETIC RADIATION SIGNATURE is corresponding, shows assessment result.
In order to facilitate staff to check the above-mentioned electromagnetic radiation monitoring instrument with weighted functionAssessment result, is used display 105 in the embodiment of the present invention, by display 105 and master controlDevice 104 processed is electrically connected, in order to show standard limited value corresponding to ELECTROMAGNETIC RADIATION SIGNATURE that gatherPercentage, the assessment result that monitor calculates.
Further, with reference to figure 5, the above-mentioned electromagnetic radiation monitoring instrument with weighted function,Also comprise: operational amplifier 106 and analog-digital converter 107;
Operational amplifier 106 is electrically connected with RMS wave detector 103, for receiving direct currentPress signal, d. c. voltage signal is carried out to operation amplifier processing, the direct current after being amplifiedPress signal;
Analog-digital converter 107 is electrically connected with operational amplifier 106 and master controller 104 respectively,For the d. c. voltage signal after amplifying is carried out to analog-to-digital conversion process, obtain data signal.
Concrete, by above-mentioned operational amplifier 106, can realize the direct current to conversionPress the amplification of signal, and direct current after the amplification obtaining by above-mentioned operational amplifier 106Pressure signal is analog signal, for controller can, by the processing that convert of this signal, also pass throughAnalog-digital converter 107 converts above-mentioned analog signal to data signal, and by above-mentioned numeral letterNumber be sent to master controller 104.
Further, with reference to figure 6, in the above-mentioned electromagnetic radiation monitoring instrument with weighted function,Antenna 101 comprises three, and three antennas 101 are respectively used to gather X in target measurement environmentThe ELECTROMAGNETIC RADIATION SIGNATURE of axle, Y-axis and Z axis, and export respectively ELECTROMAGNETIC RADIATION SIGNATURE.
Concrete, when target measurement environment is during in near-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprisesElectric field intensity signal and magnetic field intensity signal; Corresponding, above-mentioned probe comprises: electric field is visitedHead and magnet field probe; Electric field probe, for gather target measurement environment X-axis, Y-axis andThe electric field intensity signal of Z axis; Magnet field probe, for gather target measurement environment X-axis,The magnetic field intensity signal of Y-axis and Z axis.
When target measurement environment is during in far-field region, the general electric-field intensity letter of only need to measuringNumber, magnetic field intensity signal can be according to the preset relation in electric field and magnetic field to convertingElectric field intensity signal obtains; Therefore, corresponding, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensity;Probe comprises electric field probe; Electric field probe, for gathering target measurement environment X-axis, YThe electric field intensity signal of axle and Z axis.
Further, with reference to figure 6, in the above-mentioned electromagnetic radiation monitoring instrument with weighted function,Weighted wave filter 102 comprises three, three weighted wave filters 102 respectively with three antennas 101Corresponding electrical connection, for receiving respectively the ELECTROMAGNETIC RADIATION SIGNATURE that X-axis, Y-axis and Z axis are corresponding,The default spectrum curve of storing according to self carries out respective standard limit to three ELECTROMAGNETIC RADIATION SIGNATUREsThe decay of value, the corresponding ELECTROMAGNETIC RADIATION SIGNATURE of X-axis, Y-axis and Z axis after output attenuatoin.
Further, with reference to figure 6, the above-mentioned electromagnetic radiation monitoring instrument with weighted function,Also comprise: multiplier 108 and adder 109;
Multiplier 108 is electrically connected with three weighted wave filters 102 respectively, for receiving attenuationAfter X-axis, Y-axis and the corresponding ELECTROMAGNETIC RADIATION SIGNATURE of Z axis, respectively to three electromagnetic radiation lettersNumber carry out a square processing, obtain three three square values that ELECTROMAGNETIC RADIATION SIGNATURE is corresponding;
Adder 109 is electrically connected with multiplier 108 and RMS wave detector 103 respectively, usesIn processing that three three square values corresponding to ELECTROMAGNETIC RADIATION SIGNATURE are sued for peace, will be askedBe sent to RMS wave detector 103 with result.
Concrete, above-mentioned multiplier 108 is preferably three, three multipliers 108 respectively withThe corresponding electrical connection of three described three weighted wave filters 102, three multipliers 108 are for connecingReceive the corresponding ELECTROMAGNETIC RADIATION SIGNATURE of X-axis, Y-axis and Z axis after decay, then respectively to threeELECTROMAGNETIC RADIATION SIGNATURE carries out a square processing, obtains corresponding three of three ELECTROMAGNETIC RADIATION SIGNATUREs flatSide's value.
Then by adder 109, multiplier is added to three square values that obtain and carry out summation placeReason, obtains the stack field intensity value after the weighted of three directions, then by the stack field intensity obtainingValue is sent to RMS wave detector 103 and carries out detection processing.
Further, the above-mentioned electromagnetic radiation monitoring instrument with weighted function, also comprises evolutionCircuit 110;
Root circuit 110 is electrically connected with RMS wave detector 103 and operational amplifier 106 respectivelyConnect the summation that converts d. c. voltage signal to sending for receiving RMS wave detector 103As a result, summed result is carried out to evolution processing, the comprehensive electromagnetic spoke that the processing of output evolution obtainsPenetrate signal to operational amplifier 106.
Concrete, RMS wave detector 103 is sued for peace to three square values to adder 109The result (i.e. the stack field intensity value of three directions) of processing is carried out conversion process, obtains direct currentAfter voltage signal, then by root circuit 110 by the stack field intensity value after the weighted of three directionsCarry out evolution processing, concrete formula is as follows:Evolution is processed to knotFruit is processed by operational amplifier 106 and analog-digital converter 107 successively, finally by leadingThe numeral letter of the stack field intensity value after the evolution that controller 104 obtains analog-digital converter 107Number convert, can obtain the percentage based on standard limited value, and then calculate monitor value and beNo exceeding standard, final main controller 104 is controlled display and is shown conversion result, according to the method described above,User can directly check the assessment result of the ELECTROMAGNETIC RADIATION SIGNATURE in target measurement environment, nothingNeed manually again to assess.
Further, the above-mentioned electromagnetic radiation monitoring instrument with weighted function, also comprises probe;The integrated antenna 101 that is provided with in probe; Concrete, integrated three described skies in each probeLine 101.
When target measurement environment is during in near-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensitySignal and magnetic field intensity signal; Probe comprises electric field probe and magnet field probe; Electric field probe,For gathering the electric field intensity signal of target measurement environment X-axis, Y-axis and Z axis; Magnetic fieldProbe, for gathering the magnetic field intensity signal of target measurement environment X-axis, Y-axis and Z axis;
When target measurement environment is during in far-field region, ELECTROMAGNETIC RADIATION SIGNATURE comprises electric-field intensity;Probe comprises electric field probe; Electric field probe, for gathering target measurement environment X-axis, YThe electric field intensity signal of axle and Z axis.
A kind of electromagnetic radiation monitoring instrument with weighted function that uses the embodiment of the present invention to provide,Can bring following benefit:
1) it is assessed based on frequency tested electromagnetic field signal, can meet commenting of standardValency requirement.
2), when tested electromagnetic field signal is caused by multiple frequencies of electromagnetic radiation source, use the present inventionThe electromagnetic radiation monitoring instrument of weighted function that what embodiment provided have, can make testing result moreAdd accurately.
3) realize weighted by weighted wave filter, can also pass through simultaneously adjusting resistance R,The parameter of capacitor C realizes the attenuation coefficient of adjusting weighted wave filter, convenient, flexible.
A kind of electromagnetic radiation monitoring instrument with weighted function that the embodiment of the present invention provides, withComprehensive field intensity meter of the prior art detection efficiency is low and assessment result accuracy is poorCompare, its by adopt weighted wave filter 102 realize to tested electromagnetic field signal carry out based onThe assessment of frequency, because the spectrum curve of weighted wave filter 102 and standard limited value are in frequencyCurvilinear correlation, therefore it can carry out declining of respective standard limit value to the ELECTROMAGNETIC RADIATION SIGNATURE passing throughSubtract, thereby make the testing result of electromagnetic radiation more accurate, and whole process is without manuallyParticipate in, improved the detection efficiency of electromagnetic radiation.
(be that the embodiment of the present invention is carried with certain model low frequency electromagnetic field electromagnetic radiation monitoring instrument belowThe electromagnetic radiation monitoring instrument with weighted function of confession) describe for example:
The standard limited value of the low frequency frequency range of above-mentioned electro magnetic field electromagnetic radiation monitor is in frequencyFunction curve is as shown in Figure 7:
Probe by this monitor gathers X-axis, Y-axis and the Z axis three in target measurement environmentIndividual direction ELECTROMAGNETIC RADIATION SIGNATURE (ELECTROMAGNETIC RADIATION SIGNATURE is field intensity signal); By three weighted filteringDevice 102 carries out the decay of respective standard value to the ELECTROMAGNETIC RADIATION SIGNATURE gathering, wherein, above-mentionedThe conversion formula of weighted wave filter 102 is F (f)=20lg (EL)-1, obtain declining of wave filterSubtract curve as shown in Figure 8:
By the parameter of adjusting resistance R, capacitor C, realize the decay of weighted wave filter 102Coefficient equals the slope of F (f),
If tested field intensity value is E, the field intensity value after weighted is V=E*F (f)=E*20lg(EL)-1。
Then pass through three multipliers 108 to three after 102 decay of weighted wave filterThe ELECTROMAGNETIC RADIATION SIGNATURE of direction carries out a square processing, the electricity by adder 109 to three directionsMagnetic radiation signal carries out the result of square processing sues for peace, and obtains the field intensity value after stack;Be about to the field intensity value stack after the weighted of three directions:
Then the result after stack is passed through to operational amplifier 106 and analog-digital converter successively107 process accordingly, by master controller 104 to analog-to-digital conversion process to stack afterThe processing that converts of the data signal of field intensity value, obtains the percentage based on standard limited value,After shown by display 105, staff see demonstration based on hundred of standard limited valueAfter proportion by subtraction, can know in the target measurement environment of collection monitor value (being field intensity value) whetherExceed standard.
A kind of electromagnetic radiation monitoring instrument with weighted function that the embodiment of the present invention provides, withComprehensive field intensity meter of the prior art detection efficiency is low and assessment result accuracy is poorCompare, its by adopt weighted wave filter 102 realize to tested electromagnetic field signal carry out based onThe assessment of frequency, because the spectrum curve of weighted wave filter 102 and standard limited value are in frequencyCurvilinear correlation, therefore it can carry out declining of respective standard limit value to the ELECTROMAGNETIC RADIATION SIGNATURE passing throughSubtract, thereby make the testing result of electromagnetic radiation more accurate, and whole process is without manuallyParticipate in, improved the detection efficiency of electromagnetic radiation.
The above, be only the specific embodiment of the present invention, but protection scope of the present inventionBe not limited to this, any be familiar with those skilled in the art the present invention disclose skillWithin the scope of art, can expect easily changing or replacing, all should be encompassed in protection scope of the present inventionWithin. Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. an electromagnetic radiation monitoring instrument with weighted function, is characterized in that, comprising:Antenna, weighted wave filter, root-mean-square value RMS wave detector and master controller;
Described antenna, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE of target measurement environment;
Described weighted wave filter is connected with described antenna electric, default for what store according to selfSpectrum curve carries out respective standard limit value decay to described ELECTROMAGNETIC RADIATION SIGNATURE, is decayedAfter described ELECTROMAGNETIC RADIATION SIGNATURE;
Described RMS wave detector is electrically connected with described weighted wave filter, for to decay afterDescribed ELECTROMAGNETIC RADIATION SIGNATURE carries out conversion process, obtains d. c. voltage signal;
Described master controller is electrically connected with described RMS wave detector, for to described direct currentPress the signal processing that converts, obtain the assessment result that described ELECTROMAGNETIC RADIATION SIGNATURE is corresponding.
2. the electromagnetic radiation monitoring instrument with weighted function according to claim 1,It is characterized in that, the default spectrum curve that described weighted wave filter is stored according to self is to describedELECTROMAGNETIC RADIATION SIGNATURE carries out the decay of respective standard limit value, comprising:
Described weighted wave filter carries out the described ELECTROMAGNETIC RADIATION SIGNATURE receiving according to following formulaThe decay of respective standard limit value: F (f)=20lg (EL)-1; Wherein, EL(f) be electric field standardThe function of limit value in frequency; The attenuation that F (f) is ELECTROMAGNETIC RADIATION SIGNATURE.
3. the electromagnetic radiation monitoring instrument with weighted function according to claim 2,It is characterized in that, the attenuation coefficient of described weighted wave filter is
Adjust described attenuation coefficient according to the resistance in described weighted wave filter and electric capacity.
4. the electromagnetic radiation monitoring instrument with weighted function according to claim 1,It is characterized in that, also comprise display;
Described display is electrically connected with described master controller, for receiving described electromagnetic radiation letterNumber corresponding assessment result, shows described assessment result.
5. the electromagnetic radiation monitoring instrument with weighted function according to claim 4,It is characterized in that, also comprise operational amplifier and analog-digital converter;
Described operational amplifier is electrically connected with described RMS wave detector, described straight for receivingStream voltage signal, carries out operation amplifier processing to described d. c. voltage signal, after being amplifiedD. c. voltage signal;
Described analog-digital converter is electrically connected with described operational amplifier and described master controller respectively,For the d. c. voltage signal after amplifying is carried out to analog-to-digital conversion process, obtain data signal.
6. according to the electromagnetic radiation monitoring with weighted function described in claim 4 or 5Instrument, is characterized in that, described antenna comprises three, and three described antennas are respectively used to gatherThe ELECTROMAGNETIC RADIATION SIGNATURE of X-axis, Y-axis and Z axis in target measurement environment, and export respectively instituteState ELECTROMAGNETIC RADIATION SIGNATURE.
7. the electromagnetic radiation monitoring instrument with weighted function according to claim 6,It is characterized in that, described weighted wave filter comprises three, and three described weighted wave filters respectivelyWith three corresponding electrical connections of described antenna, for receiving respectively X-axis, Y-axis and Z axis correspondenceELECTROMAGNETIC RADIATION SIGNATURE, according to self storage default spectrum curve to three described electromagnetism spokesPenetrate signal and carry out the decay of respective standard limit value, X-axis, Y-axis and Z axis after output attenuatoinCorresponding described ELECTROMAGNETIC RADIATION SIGNATURE.
8. the electromagnetic radiation monitoring instrument with weighted function according to claim 7,It is characterized in that, also comprise: multiplier and adder;
Described multiplier is electrically connected with three described weighted wave filters respectively, for receiving attenuationAfter X-axis, Y-axis and the corresponding described ELECTROMAGNETIC RADIATION SIGNATURE of Z axis, respectively to three described electricityMagnetic radiation signal carries out a square processing, obtains corresponding three of three described ELECTROMAGNETIC RADIATION SIGNATUREsSquare value;
Described adder is electrically connected with described multiplier and described RMS wave detector respectively, usesIn processing that three three square values corresponding to described ELECTROMAGNETIC RADIATION SIGNATURE are sued for peace, willBe sent to described RMS wave detector to summed result.
9. the electromagnetic radiation monitoring instrument with weighted function according to claim 8,It is characterized in that, also comprise root circuit;
Described root circuit is electrically connected with described RMS wave detector and operational amplifier respectively,The summed result that converts d. c. voltage signal to sending for receiving described RMS wave detector,Described summed result is carried out to evolution processing, the comprehensive electromagnetic radiation that the processing of output evolution obtainsSignal is to described operational amplifier.
10. the electromagnetic radiation monitoring instrument with weighted function according to claim 6,It is characterized in that, also comprise probe; Integratedly in described probe be provided with described antenna;
When target measurement environment is during in near-field region, described ELECTROMAGNETIC RADIATION SIGNATURE comprises electric fieldStrength signal and magnetic field intensity signal; Described probe comprises electric field probe and magnet field probe; InstituteState electric field probe, for gathering the electric-field strength of target measurement environment X-axis, Y-axis and Z axisDegree signal; Described magnet field probe, for gathering target measurement environment X-axis, Y-axis and ZThe magnetic field intensity signal of axle;
When target measurement environment is during in far-field region, described ELECTROMAGNETIC RADIATION SIGNATURE comprises electric fieldIntensity; Described probe comprises electric field probe; Described electric field probe, for gathering target measurementThe electric field intensity signal of X-axis, Y-axis and Z axis in environment.
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