CN103616575A - Radiation emission test system and radiation emission test method - Google Patents

Abstract

The invention provides a radiation emission test system and a radiation emission test method, and relates to the technical field of electromagnetic compatibility test. The radiation emission test system includes a control device, a signal source, a receiver, a radio communication tester, a radiofrequency signal processor, a filter, a radiofrequency cable, a general purpose interface bus (GIPB) cable, an electric wave darkroom, a preamplifier, a measuring antenna, an antenna tower, an antenna cable, a test rotary table, a radio communication tester antenna and a pre-embedded cable. The preamplifier, the measuring antenna, the antenna tower, the test rotary table and the radio communication tester antenna are arranged in the electric wave darkroom; and the pre-embedded cable is embedded in the wall of the electric wave darkroom or under the ground. By establishing a mathematical model of the electric field intensity for the radiation emission test system and analyzing various uncertain source components of the radiation emission test system, the expanded uncertainty of the radiation emission test system can be determined so that a test result can be revised, and the accuracy and the reliability of a final test result can be raised.

Description

A kind of radiation emission test system and method

Technical field

The present invention relates to Electromagnetic Compatibity Test Technology field, particularly, relate to a kind of radiation emission test system and method.

Background technology

At power domain, conventionally need to carry out electromagnetic compatibility test to intelligent substation equipment, to determine whether intelligent substation equipment can normally operation in complicated electromagnetic environment.

At present, for the electromagnetic compatibility test of intelligent substation equipment, must build radiation test system according to corresponding national standard, the technology contents being specifically related to is as follows:

1,, when tested equipment is non-wireless communication device, needs establishing criteria GB9254-2008 to design radiation emission test system, and when tested equipment is Wireless Telecom Equipment, need establishing criteria GB/T22450.1-2008 to design radiation emission test system.

2, no matter be the electromagnetic compatibility test of non-wireless communication device, or the electromagnetic compatibility test of Wireless Telecom Equipment, it measures frequency range is all 30MHz～6GHz.During measurement, measurement frequency range need to be divided into two frequency sub-band and carry out respectively, the following frequency range of 1GHz (30MHz～1GHz) and 1GHz are with super band (1GHz～6GHz); And the electromagnetic compatibility test of the following frequency range of 1GHz must carry out in semi-anechoic chamber, 1GHz carries out after must spreading absorbing material on fully anechoic chamber or the ground at semi-anechoic chamber with the electromagnetic compatibility test of super band.That is to say, complete electromagnetic compatibility test, need in different measurement places, carry out for different measurement frequency sub-band, be in fact equivalent to do twice measurement.

3, electromagnetic compatibility measure limit value (field intensity Zhi， unit: dB μ V/m) given by corresponding measurement standard, be the judgment basis in measuring process.If the harassing and wrecking of the tested equipment measuring surpass limit value, just show that the harassing and wrecking of this tested equipment are defective, otherwise be qualified.

4, in standard GB9254-2008 and GB/T22450.1-2008, for the following frequency range of 1GHz, its limit value is to provide under the measuring distance of 10m, and for 1GHz, with super band, its limit value is to provide under the measuring distance of 3m.If the measurement of 10m distance can not be carried out in existing measurement place, can only carry out the measurement of 3m distance, so just the limit value under 10m distance in standard need to be converted into the limit value under 3m distance, reduction formula is: L3m=L10m+20lg (10/3); Wherein, L3m is the limit value (dB μ V/m) under 3m measuring distance, and L10m is the limit value (dB μ V/m) under 10m measuring distance.

5,, because non-wireless communication device is divided into A, two grades of B, the limit of disturbance difference that these two kinds of grades are corresponding, when therefore non-wireless communication device is tested, first needs to confirm that the grade of tested equipment is A level or B level; For Wireless Telecom Equipment, its limit of disturbance equals the limit of disturbance of B level non-wireless communication device.

6, in the radiation disturbance limit value list of electromagnetic compatibility, can see three kinds of dissimilar limit values, the quasi-peak value of the following frequency range of 1GHz (QP) limit value, 1GHz are with mean value (AV) limit value and peak value (PK) limit value of super band.Therefore, when measuring harassing and wrecking, receiver must be set to corresponding detecting way (detecting way be for the wave detector in receiver), otherwise result can be incorrect.

Current, the radiation emission test system of building for the electromagnetic compatibility test of intelligent substation equipment is very different, and do not consider that built radiation emission test system itself is for the uncertainty influence factor of electromagnetic compatibility test, the result accuracy that final test obtains is also not high enough.

Summary of the invention

The fundamental purpose of the embodiment of the present invention is to provide a kind of radiation emission test system and method, to provide a kind of for intelligent substation equipment being carried out to the system of electromagnetic compatibility test, and provide a kind of uncertainty of radiation emission test system of utilizing test result to be revised to improve the method for testing of test result accuracy.

To achieve these goals, the embodiment of the present invention provides a kind of radiation emission test system, comprising: opertaing device, signal source, receiver, radio communication tester, radiofrequency signal processor, wave filter, radio-frequency cable, general purpose interface bus GPIB cable, anechoic chamber,, preamplifier, measurement antenna, antenna tower, antenna cable, test table, radio communication tester antenna, pre-buried cable; Wherein,

Described preamplifier, measurement antenna, antenna tower, test table, radio communication tester antenna are arranged in described anechoic chamber; Described pre-buried cable burial is inner or below ground in the wall of described anechoic chamber;

Described test table, for bearing intelligent substation equipment, can drive described intelligent substation equipment to rotate in surface level;

Described radio communication tester antenna, is arranged at described test table below;

Described measurement antenna, is fixedly installed on described antenna tower, and connects described preamplifier by described antenna cable;

Described antenna tower, with the setpoint distance setting of being separated by of described test table, can drive described measurement antenna vertically to move up and down;

Described radiofrequency signal processor, connects respectively described signal source, receiver, radio communication tester and wave filter by described radio-frequency cable; By described pre-buried cable, connect respectively described preamplifier and described radio communication tester antenna;

Described opertaing device, connects respectively described signal source, receiver, radio communication tester, radiofrequency signal processor and wave filter by described GPIB cable.

Accordingly, the present invention also provides a kind of and utilizes radiation emission test system as above to carry out the method for radiation emission test, comprising:

Test obtains the radiation disturbance limit value of intelligent substation equipment;

Utilize the expanded uncertainty of described radiation emission test system to revise testing the radiation disturbance limit value obtaining;

Wherein, the expanded uncertainty of described radiation emission test system calculates according to following formula:

$\left\{\begin{array}{c}U\left(E\right)=k\·U_C\left(E\right)\\ U_C=\left(E\right)=\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{Ci}}^2{\mathrm{Ui}}^2}\end{array}\right.$

Wherein, n is total number of the uncertainty source component of described radiation emission test system; Ci is the sensitivity coefficient of i uncertainty source component; Ui is the uncertainty of i uncertainty source component; U (E) is the expanded uncertainty of described radiation emission test system; K is for comprising the factor;

Described uncertainty source component comprises: receiver voltage readings, receiver voltage readings, the damping capacity of the interconnection network between receiver and measurement antenna, measure antenna factor, to the inaccurate modified value of receiver sine voltage, receiver pulse height responds undesirable modified value, receiver pulse repetition rate responds undesirable modified value, the modified value of the local noise effect of receiver, the modified value of mismatch error, measure the modified value of antenna factor interpolated error, measure antenna factor with the antenna factor of height change and standard dipole antenna the modified value with the difference of height change, measure the modified value of antenna directivity, measure the modified value of antenna phase center position, measure the modified value of antenna cross-polarization response, measure the unbalanced modified value of antenna, the modified value of imperfection site attenuation, measure antenna and the indeterminable modified value of intelligent substation equipment room distance, test table is from the unsuitable modified value of anechoic chamber, floor level.

By means of technique scheme, the invention provides a kind of radiation emission test system, this system can be carried out electromagnetic compatibility test to Wireless Telecom Equipment and non-wireless communication device, simultaneously, the invention provides a kind of radiation emission test method, by to this radiation emission test system made electric field intensity mathematical model, analyze the various uncertainties source component of this radiation emission test system, determined the expanded uncertainty of this radiation emission test system, utilize the expanded uncertainty of this radiation emission test system to revise test result, can improve accuracy and the reliability of final testing result.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of radiation emission test system provided by the invention;

Fig. 2 is radiation emission test method flow schematic diagram provided by the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

The invention provides a kind of radiation emission test system, as shown in Figure 1, this system comprises: opertaing device 101, signal source 102, receiver 103, radio communication tester 104, radiofrequency signal processor 105, wave filter 106, radio-frequency cable 107, GPIB cable 108, anechoic chamber, 109, preamplifier 110, measurement antenna 111, antenna tower 112, antenna cable 113, test table 114, radio communication tester antenna 115, pre-buried cable 116; Wherein, receiver 103 is comprised of frequency spectrograph 117 and preselector 118; Anechoic chamber, 109 is semi-anechoic chamber or fully anechoic chamber; Antenna tower 112 and test table 114 be separated by 3 meters or 10 meters of settings, to meet the test of intelligent substation equipment being carried out to different frequency range.

As shown in Figure 1, preamplifier 110, measurement antenna 111, antenna tower 112, test table 114, radio communication tester antenna 115 are arranged in anechoic chamber, 109; It is inner or below ground that pre-buried cable 116 is embedded in the wall of anechoic chamber, 109;

Test table 114, for bearing intelligent substation equipment, can drive intelligent substation equipment to rotate in surface level;

Radio communication tester antenna 115, is arranged at test table 114 belows;

Measure antenna 111, be fixedly installed on antenna tower 112, and connect preamplifier 110 by antenna cable 113;

Antenna tower 112, with the test table 114 setpoint distance setting of being separated by, can drive and measure antenna 111 and vertically move up and down;

Radiofrequency signal processor 105, by radio-frequency cable 107 difference connecting signal sources 102, receiver 103, radio communication tester 104 and wave filter 106; By pre-buried cable 116, connect respectively preamplifier 110 and radio communication tester antenna 115;

Opertaing device 101, by GPIB cable 108 difference connecting signal sources 102, receiver 103, radio communication tester 104, radiofrequency signal processor 105 and wave filter 106.

In the present invention, the effect of signal source 102 is mainly for carrying out path calibration, measures the damping capacity of path to different frequency signals.

The effect of radiofrequency signal processor 105 is the automatic switchovers that realize various measuring route.

Radio communication tester 104 is when the base station of setting up out of doors in radio communication operator.

The larger CF signal of effect filtering power of wave filter 106, in order to prevent that frequency spectrograph frequency mixer from being burnt out by CF signal on the one hand, on the other hand CF signal by filtering after, the decay of the inside of frequency spectrograph can be got to minimum, to reduce the end of making an uproar, increase the dynamic range of measuring.

Measure antenna 111 for received radiation harassing and wrecking, its effect is equivalent to a sensor, converts disturbance field strength to disturbance voltage.

Radio communication tester antenna 115 fixed placement, under test table 114, are not rotated with the rotation of test table 114.

The end of making an uproar of considering the above frequency of receiver 1031GHz, is higher, and it is less than normal that field intensity and the surplus between limit of disturbance of antenna measurement point converted at the end of making an uproar of part high-frequency point, therefore need to amplify, compensate at measuring route front end access preamplifier 110.

Opertaing device 101 is control centers of system, by the control software loading, realizes the output of reading, analyze, judging and report to the control of instrument and equipment and measurement data above.

While carrying out electromagnetic compatibility test for non-wireless communication device, owing to not needing to carry out radio communication connection, therefore, radio communication tester 104, radio communication tester antenna 115 and wave filter 106 can be closed and do not used.

The present invention also provides a kind of radiation emission test method, and as shown in Figure 2, the method comprises:

Step S1, test obtains the radiation disturbance limit value of intelligent substation equipment.

This step can be divided into sweeps and surveys eventually two steps in advance:

Step S11, sweeps in advance as by adopting the mode of peak value (PK) limit value detection, searches rapidly the emission maximum frequency of intelligent substation radiation of equipment harassing and wrecking.In this process, antenna tower move up and down from 1m～4m with measuring antenna, and test table turns to respect to the different azimuth (conventionally within the scope of 360 °, as-180 °～+ 180 °) of measuring antenna with intelligent substation equipment.

Step S12, surveying is eventually in sweeping in advance the data that obtain, to choose several (being generally 6) emission maximum frequencies, then on these frequencies, test again, while surveying eventually, according to the detecting way identifying in limit value (quasi-peak value limit value or mean value limit value), carry out, test obtains the radiation disturbance limit value of intelligent substation equipment.In this step, because the following frequency range of 1GHz and 1GHz are different with the measurement place of super band, the toggle switch of preamplifier residing position also different (path loss is different) under these two frequency ranges simultaneously, the measurement of these two frequency ranges need to separately be carried out, as twice measurement.

Step S2, utilizes the expanded uncertainty radiation disturbance limit value that test obtains to step S1 of this radiation emission test system to revise, and in this step, the expanded uncertainty of this radiation emission test system calculates according to following formula:

$\left\{\begin{array}{c}U\left(E\right)=k\·U_C\left(E\right)\\ U_C=\left(E\right)=\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{Ci}}^2{\mathrm{Ui}}^2}\end{array}\right.$

Wherein, n is total number of the uncertainty source component of described radiation emission test system; Ci is the sensitivity coefficient of i uncertainty source component; Ui is the uncertainty of i uncertainty source component; U (E) is the expanded uncertainty of described radiation emission test system; K is for comprising the factor.

The expanded uncertainty of the radiation emission test system of utilizing in step S2 is determined in accordance with the following steps:

Step S21, the uncertainty source of analyzing radiation transmission test system, comprising: the main parameter of testing apparatus and the layout of instrument and equipment.

Step S22, the uncertainty component being caused by the parameter of main testing apparatus comprises: the damping capacity of the interconnection network between the voltage readings of frequency spectrograph, frequency spectrograph and measurement antenna, measure antenna factor, measure the uncertainty that antenna factor introduces with height change, measure the uncertainty introduced antenna phase center position, measure uncertainty, the uncertainty that the imbalance of measuring antenna is introduced that antenna factor frequency interpolation introduces, measure the impact of antenna cross-polarization.

Step S23, the uncertainty component that the layout of instrument and equipment causes comprises: measure uncertainty that antenna and intelligent substation equipment room introduce apart from indeterminacy, test table overhead highly inappropriate introducing uncertainty, measure the uncertainty of the mismatch error introducing between antenna output end and receiver inlet.

Step S24, sets up the mathematical model of the radiant field intensity of radiation emission test system according to uncertainty component.

E=Vr+Lc+AF+δVsw+δVPa+δVPr+δVnf+δM+δAFf

+δAFh+δAdir+δAph+δAcp+δAbal+δSA+δd+δh

Wherein, Vr is receiver voltage readings, dB μ V;

Lc is receiver and the damping capacity of measuring the interconnection network between antenna, dB;

AF is for measuring antenna factor, dB/m;

δ Vsw is to the inaccurate modified value of receiver sine voltage, dB;

δ VPa is that receiver pulse height responds undesirable modified value, dB;

δ VPr is that receiver pulse repetition rate responds undesirable modified value, dB;

δ Vnf is the modified value of the local noise effect of receiver, dB;

δ M is the modified value of mismatch error, dB;

δ AFf is for measuring the modified value of antenna factor interpolated error, dB;

δ AFh for measure antenna factor with the antenna factor of height change and standard dipole antenna the modified value with the difference of height change, dB;

δ Adir is for measuring the modified value of antenna directivity, dB;

δ Aph is for measuring the modified value of antenna phase center position, dB;

δ Acp is for measuring the modified value of antenna cross-polarization response, dB;

δ Abal is for measuring the unbalanced modified value of antenna, dB;

δ SA is the modified value of imperfection site attenuation, dB;

δ d is for measuring antenna and the indeterminable modified value of measured piece spacing, dB;

δ h is overhead highly unsuitable modified value of test table, dB.

Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (5)

1. a radiation emission test system, it is characterized in that, comprising: opertaing device, signal source, receiver, radio communication tester, radiofrequency signal processor, wave filter, radio-frequency cable, general purpose interface bus GPIB cable, anechoic chamber,, preamplifier, measurement antenna, antenna tower, antenna cable, test table, radio communication tester antenna, pre-buried cable; Wherein,

Described preamplifier, measurement antenna, antenna tower, test table, radio communication tester antenna are arranged in described anechoic chamber; Described pre-buried cable burial is inner or below ground in the wall of described anechoic chamber;

Described test table, for bearing intelligent substation equipment, can drive described intelligent substation equipment to rotate in surface level;

Described radio communication tester antenna, is arranged at described test table below;

Described measurement antenna, is fixedly installed on described antenna tower, and connects described preamplifier by described antenna cable;

Described antenna tower, with the setpoint distance setting of being separated by of described test table, can drive described measurement antenna vertically to move up and down;

Described radiofrequency signal processor, connects respectively described signal source, receiver, radio communication tester and wave filter by described radio-frequency cable; By described pre-buried cable, connect respectively described preamplifier and described radio communication tester antenna;

Described opertaing device, connects respectively described signal source, receiver, radio communication tester, radiofrequency signal processor and wave filter by described GPIB cable.

2. radiation emission test system according to claim 1, is characterized in that, described receiver is comprised of frequency spectrograph and preselector.

3. radiation emission test system according to claim 1, is characterized in that, described anechoic chamber, is semi-anechoic chamber or fully anechoic chamber.

4. radiation emission test system according to claim 1, is characterized in that, described antenna tower, with described test table be separated by 3 meters or 10 meters of settings.

5. utilize radiation emission test system as claimed in claim 1 to carry out a method for radiation emission test, it is characterized in that, comprising:

Test obtains the radiation disturbance limit value of intelligent substation equipment;

Utilize the expanded uncertainty of described radiation emission test system to revise testing the radiation disturbance limit value obtaining;

Wherein, the expanded uncertainty of described radiation emission test system calculates according to following formula:

$\left\{\begin{array}{c}U\left(E\right)=k\·U_C\left(E\right)\\ U_C=\left(E\right)=\sqrt{\underset{i=1}{\overset{n}{\mathrm{\Σ}}}{\mathrm{Ci}}^2{\mathrm{Ui}}^2}\end{array}\right.$

Wherein, n is total number of the uncertainty source component of described radiation emission test system; Ci is the sensitivity coefficient of i uncertainty source component; Ui is the uncertainty of i uncertainty source component; U (E) is the expanded uncertainty of described radiation emission test system; K is for comprising the factor;

Described uncertainty source component comprises: receiver voltage readings, receiver voltage readings, the damping capacity of the interconnection network between receiver and measurement antenna, measure antenna factor, to the inaccurate modified value of receiver sine voltage, receiver pulse height responds undesirable modified value, receiver pulse repetition rate responds undesirable modified value, the modified value of the local noise effect of receiver, the modified value of mismatch error, measure the modified value of antenna factor interpolated error, measure antenna factor with the antenna factor of height change and standard dipole antenna the modified value with the difference of height change, measure the modified value of antenna directivity, measure the modified value of antenna phase center position, measure the modified value of antenna cross-polarization response, measure the unbalanced modified value of antenna, the modified value of imperfection site attenuation, measure antenna and the indeterminable modified value of intelligent substation equipment room distance, test table is from the unsuitable modified value of anechoic chamber, floor level.

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