CN101398450B - Electric network peak transmission test device - Google Patents
Electric network peak transmission test device Download PDFInfo
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- CN101398450B CN101398450B CN2007100463817A CN200710046381A CN101398450B CN 101398450 B CN101398450 B CN 101398450B CN 2007100463817 A CN2007100463817 A CN 2007100463817A CN 200710046381 A CN200710046381 A CN 200710046381A CN 101398450 B CN101398450 B CN 101398450B
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Abstract
The invention discloses a device for testing the conduction of electric network peak. The device comprises a metal screen cavity (4) which is internally provided with a coupling network screen cavity (5); a network connecting wire (1) is connected with the coupling network circuit in the coupling network screen cavity (5) by an arrival line (3) of the coupling network; the electric network signal processed by the coupling network is connected with the outlet terminal (9) of the testing device by an outlet line (7) of the coupling network. The invention solves the problem that the amplitude of network source equivalent to the electric network peak signal can not be accurately detected in the prior art and has the effect of simple structure, high measuring accuracy and convenient use, etc.
Description
Technical field
The present invention relates to a kind of device of testing the electric network peak signal, especially can remove the electric network peak transmission test device of electrical network first-harmonic and low-order harmonic interference performance thereof.
Background technology
In the electromagnetic compatibility test, the electric network peak conduction measurement does not also have special-purpose measurement mechanism, generally is to use oscillograph directly to measure at present, catches electric network peak according to regulating the oscillograph triggering level.Because power supply first-harmonic and influence of harmonic thereof in the electrical network, the electric network peak signal that is more or less the same with first-harmonic or humorous wave amplitude then is difficult to accurately catch, and brings very big difficulty for the electric network peak conduction measurement, causes measurement inaccurate easily, thereby causes misjudgment.
In the relevant wave filter product, the signal that the wave filter of many types can the filtering lower frequency is arranged at home and abroad, less to the signal attenuation of upper frequency simultaneously.But these wave filters can not directly apply to the measurement of the electric network peak conducted signal in electromagnetic compatibility field, and main cause is: the one, and the electric network peak signal amplitude is generally bigger, can reach 700-800V; The 2nd, the frequency of the low frequency signal of requirement filtering is lower, is generally mains supply frequency content and the low-order harmonic thereof of direct current to 400Hz; The 3rd, its Frequency Response is had relatively high expectations, and will guarantee as far as possible also that in the filters low composition time domain of electric network peak signal is undistorted, also is the smooth interior amplitude versus frequency characte of passband.For making the electric network peak conduction measurement accurate, need on the basis of using for reference the Design of Filter principle, to carry out the design of electric network peak conduction measurement proving installation.
Summary of the invention
Can not accurately catch the deficiency of suitable electric network peak signal in order to overcome existing electric network peak conduction measurement device with the electric network source amplitude; The object of the present invention is to provide a kind of electric network peak transmission test device; This device is on the basis of filter application design concept; Can effectively remove of the influence of electric network source signal, the electric network peak conducted signal is measured accurately and reliably the electric network peak signal measurement.
In order to reach the foregoing invention purpose, the technical scheme that the present invention is adopted for its technical matters of solution provides a kind of electric network peak transmission test device, and this device comprises:
The coupling network shielding cavity is installed in the metallic shield cavity, and the electrical network connecting line is connected with coupling network circuit in the coupling network shielding cavity through shielding insulation terminal and coupling network arrival line, and power network signal gets into the coupling network circuit through this path.The coupling network shielding cavity tightens up bonding jumper through metal and is connected fixing with the metallic shield cavity.Power network signal through the coupling network processing of circuit is connected with the measurement mechanism lead-out terminal through the coupling network egress line.Measurement mechanism lead-out terminal selection standard connector, the measurement mechanism lead-out terminal is fixed through the insulation filling material in its metab and the metallic shield cavity.
Coupling network circuit in the above-mentioned coupling network shielding cavity comprises: the coupling network arrival line is connected through first resistance R 1 and a group capacitor, inductor or " L " type filtering coupled circuit through first resistance R 1 and a group capacitor, resistance composition; Above-mentioned " L " type filtering coupled circuit respectively is: the first capacitor C1 and the first inductor L1, the second capacitor C2 and the second inductor L2, the 3rd capacitor C3 and the 3rd inductor L3, the 4th capacitor C4 and the 4th inductor L4, the 5th capacitor C5 and second resistance R 2; The coupling network egress line is connected in the two ends of second resistance R 2, exports treated signal through the measurement mechanism lead-out terminal.
Electric network peak transmission test device of the present invention is owing to adopt the coupling network circuit elements device parameters through optimal design; Adopt the metallic shield cavity to avoid coupling network to receive external disturbance; Therefore; Obtained following beneficial effect: (1) has the characteristic than high attenuation to low frequency signal, avoids surveying instrument saturated; (2) high-frequency signal had the characteristic of less loss; (3) have the interior amplitude versus frequency characte of more smooth passband, reduce the time domain plethysmographic signal distortion of surveying; (4) avoid metering circuit to receive outside electromagnetic interference to guarantee measuring accuracy; (5) simple in structure, use reliable.
Description of drawings
Fig. 1 is the transverse section structural map of electric network peak transmission test device of the present invention;
Fig. 2 is the circuit theory diagrams of coupling network among the present invention.
Embodiment
Below in conjunction with description of drawings the preferred embodiments of the present invention.
Fig. 1 is preferential embodiment of the present invention, a kind of transverse section structural map of electric network peak transmission test device,
Shown in the embodiment of Fig. 1, the inventive system comprises: electrical network connecting line 1, shielding insulation terminal 2; Coupling network arrival line 3, metallic shield cavity 4, coupling network shielding cavity 5; The cavity metal tightens up bonding jumper 6, coupling network egress line 7, insulation filling material 8; Measurement mechanism lead-out terminal 9, lead-out terminal metab 10.Its configuration annexation is following:
Coupling network shielding cavity 5 is installed in metallic shield cavity 4; Electrical network connecting line 1 is connected with coupling network circuit in the coupling network shielding cavity 5 through shielding insulation terminal 2 and coupling network arrival line 3, and power network signal gets into the coupling network circuit through this path.Coupling network shielding cavity 5 tightens up bonding jumper 6 through metal and is connected fixing with metallic shield cavity 4.Power network signal through the coupling network processing of circuit is connected with measurement mechanism lead-out terminal 9 through coupling network egress line 7.Measurement mechanism lead-out terminal 9 selection standard connectors, measurement mechanism lead-out terminal 9 is fixing with the insulation filling material 8 in the metallic shield cavity 4 through its metab 10.
Fig. 2 is the schematic diagram of the coupling network circuit in the above-mentioned coupling network shielding cavity 5; As shown in Figure 2: coupling network arrival line 3 is connected through first resistance R 1 and a group capacitor, inductor or " L " type filtering coupled circuit through first resistance R 1 and a group capacitor, resistance composition; Above-mentioned " L " type filtering coupled circuit respectively is: the first capacitor C1 and the first inductor L1, the second capacitor C2 and the second inductor L2, the 3rd capacitor C3 and the 3rd inductor L3, the 4th capacitor C4 and the 4th inductor L4, the 5th capacitor C5 and second resistance R 2; Coupling network egress line 7 is connected in the two ends of second resistance R 2, through the signal of measurement mechanism lead-out terminal 9 outputs through filtering.
In the embodiment of the invention, the component parameters of above-mentioned coupling network circuit is selected as follows: the first capacitor C1, the second capacitor C2, the 3rd capacitor C3, the 4th capacitor C4, the 5th capacitor C5 are 0.1 μ F～2.0 μ F, voltage 0～800V; The first inductor L1, the second inductor L2, the 3rd inductor L3, the 4th inductor L4 are 0.25mH～2.2mH; First resistance R 1, second resistance R 2 are 50 Ω.
Further the course of work of the present invention is described below.
Use insulating material that metallic cavity is wrapped up fully during measurement, electrical network connecting line 1 inserts respectively between the two-phase power supply line of electrical network to be measured, and monitoring equipment (oscillograph) is connected with lead-out terminal 9.Regulate the oscillograph triggering level according to measuring required precision; Because the frequency of spiking is far above electrical network first-harmonic and low order (below 50 times) harmonic wave thereof; Electrical network first-harmonic and harmonic wave thereof are effectively removed; Simultaneously spiking is zero-decrement basically passes through, the signal effecting reaction of catching in the oscillograph state of spiking in the electrical network, reach the measurement purpose.
In sum, coupling network circuit structure and the passive device parameter of the present invention through optimal design makes the electric network peak conduction measurement be able to effective realization: not only filtering power supply first-harmonic (50Hz-400Hz) and several times harmonic wave; And it is less to spiking in the electrical network (frequency range tens kHz are to hundreds of MHz) loss; In the frequency range of electric network peak signal place, have the amplitude versus frequency characte in the more smooth passband, thereby guarantee that time-domain signal is undistorted.
Electric network peak transmission test device of the present invention proves through the reality test: low frequency signal is had the characteristic than high attenuation, can reach 110dB at least to the first-harmonic of 50Hz power supply and the decay of low order (below 50 times) harmonic wave thereof; High-frequency signal is had the characteristic of less loss, is zero to the above signal attenuation of 10kHz basically.Amplitude versus frequency characte in the passband has more smooth characteristics, and the amplitude versus frequency characte difference in 10kHz to 50MHz scope is no more than 2dB.The electrical network measuring voltage can reach 800V.Thereby, obtained simple in structurely, measuring accuracy is higher, and is easy to use waits beneficial effect.
Obviously, those skilled in the art can carry out various changes and distortion to electric network peak transmission test device of the present invention and not break away from the spirit and scope of the present invention.Like this, if these modifications of the present invention and distortion belong within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and is out of shape interior.
Claims (3)
1. an electric network peak transmission test device is characterized in that, this device comprises:
Coupling network shielding cavity [5] is installed in metallic shield cavity [4]; Electrical network connecting line [1] is connected with coupling network circuit in the coupling network shielding cavity [5] through shielding insulation terminal [2] and coupling network arrival line [3], and power network signal gets into the coupling network circuit through this path; Coupling network shielding cavity [5] tightens up bonding jumper [6] through metal and is connected fixing with metallic shield cavity [4]; Power network signal through the coupling network processing of circuit is connected with measurement mechanism lead-out terminal [9] through coupling network egress line [7]; Measurement mechanism lead-out terminal [9] is fixing with the insulation filling material [8] in the metallic shield cavity [4] through its metab [10].
2. electric network peak transmission test device according to claim 1; It is characterized in that: the coupling network circuit in the described coupling network shielding cavity [5] comprises: described coupling network arrival line [3] is connected through first resistance R 1 and a group capacitor, inductor or " L " type filtering coupled circuit through first resistance R 1 and a group capacitor, resistance composition; Above-mentioned " L " type filtering coupled circuit respectively is: the first capacitor C1 and the first inductor L1, the second capacitor C2 and the second inductor L2, the 3rd capacitor C3 and the 3rd inductor L3, the 4th capacitor C4 and the 4th inductor L4, the 5th capacitor C5 and second resistance R 2; Coupling network egress line [7] is connected in the two ends of second resistance R 2, exports treated signal through measurement mechanism lead-out terminal [9].
3. electric network peak transmission test device according to claim 1 and 2; It is characterized in that: the component parameters range of choice of described coupling network circuit is following: the first capacitor C1, the second capacitor C2, the 3rd capacitor C3, the 4th capacitor C4, the 5th capacitor C5 are 0.1 μ F～2.0 μ F, voltage 0～800V; The first inductor L1, the second inductor L2, the 3rd inductor L3, the 4th inductor L4 are 0.25mH～2.2mH; First resistance R 1, second resistance R 2 are 50 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100463817A CN101398450B (en) | 2007-09-25 | 2007-09-25 | Electric network peak transmission test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100463817A CN101398450B (en) | 2007-09-25 | 2007-09-25 | Electric network peak transmission test device |
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| CN101398450A CN101398450A (en) | 2009-04-01 |
| CN101398450B true CN101398450B (en) | 2012-07-04 |
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| CN2007100463817A Expired - Fee Related CN101398450B (en) | 2007-09-25 | 2007-09-25 | Electric network peak transmission test device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104502755B (en) * | 2014-12-15 | 2017-04-19 | 北京航空航天大学 | Gaussian even pulse high-current high-power broadband power line injection coupling network and construction method thereof |
| CN108896846B (en) * | 2018-06-01 | 2020-11-13 | 中国人民解放军海军工程大学 | Device and method for measuring conducted interference of high-voltage system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2112219A1 (en) * | 1970-10-01 | 1972-06-16 | Mac Ferrin Michael | |
| FR2747474B1 (en) * | 1996-04-12 | 1998-05-07 | Chappuis Pierre | PORTABLE TESTER FOR SEMICONDUCTOR POWER COMPONENTS AND THEIR PROTECTIVE ELEMENTS |
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2007
- 2007-09-25 CN CN2007100463817A patent/CN101398450B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2112219A1 (en) * | 1970-10-01 | 1972-06-16 | Mac Ferrin Michael | |
| FR2747474B1 (en) * | 1996-04-12 | 1998-05-07 | Chappuis Pierre | PORTABLE TESTER FOR SEMICONDUCTOR POWER COMPONENTS AND THEIR PROTECTIVE ELEMENTS |
Non-Patent Citations (1)
| Title |
|---|
| 刘晶红.电磁兼容测试方法及应用设计.《长春理工大学学报》.2004,第27卷(第2期),118-120. * |
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