CN110376442A - Measure a kind of aided measurement device of shield facility power-supply filter insertion loss - Google Patents
Measure a kind of aided measurement device of shield facility power-supply filter insertion loss Download PDFInfo
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- CN110376442A CN110376442A CN201910499486.0A CN201910499486A CN110376442A CN 110376442 A CN110376442 A CN 110376442A CN 201910499486 A CN201910499486 A CN 201910499486A CN 110376442 A CN110376442 A CN 110376442A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
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- General Physics & Mathematics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to a kind of aided measurement devices of measurement shield facility power-supply filter insertion loss, it is characterized in that, including hollow copper post body one, the lower ending opening of copper post body one, it is closed by copper sheet upper end, after the aided measurement device is installed in place, there is good be electrically connected between the lower end of copper post body one and the metallic shield of filter；Copper sheet is equipped with RF connector；Copper nut cylinder is equipped in copper post body one, copper nut cylinder is connected by conducting wire with the inner conductor of RF connector, the input terminal of filter or the bolt terminal of output end are protruded into copper post body one and are interlocked with copper nut cylinder, so that RF connector is connected to the input terminal or output end of filter；Insulator is equipped between copper nut cylinder and the inner wall of copper post body one.The present invention can by standard GB/T7343 regulation carry out insertion loss measurement and highly desirable control filter output and input between electromagnetic coupling that may be present.
Description
Technical field
The present invention relates to it is a kind of by standard GB/T7343 measurement shield facility power-supply filter insertion loss measurement method,
Belong to the field of measuring technique of passive EMC filter rejection characteristic.
Background technique
The measurement of shield facility power-supply filter insertion loss belong to standard " GB/T 7343-2017/IEC/CISPR17:
The measurement method of 2011 passive EMC filtering device rejection characteristics " (hereinafter referred to as GB/T 7343) scope.
Provide that, in the rejection characteristic of testing passive EMC filter, tested filter will be placed by standard GB/T 7343
In the standard 5.2.2.4 section test box.Since shield facility power-supply filter is bulky, quality tens very
To several hundred kilograms of ranges.Firstly, involving great expense by the regulation manufacture test box of 5.2.2.4 in standard GB/T7343.Such as certain
The outer dimension of three-phase and four-line screened room power-supply filter is 1300 (length), 500 (width), 170 (height)；By in standard GB/T7343
B.1.3 the regulation of (page 30), the test box surrounding of tested filter and the space that stay 50mm above, so implement the filtering
The size of device test box is just huger；Secondly, the 133kg that weighs of above-mentioned three-phase and four-line screened room power-supply filter, measurement
When, it is nearly impossible if to put into test box by manpower or it is moved out test box.Third, be by standard GB/
B.3 (standard page 30) and B.4 the example of (standard page 31) designs test box that T7343 recommends.B.3 test and B.4
The exemplary marrow of case is sought to the electromagnetic coupling control between tested filter input and output side to minimum level.Cause
For the insertion loss characteristic of shield facility power-supply filter can be greater than 100dB or more.Any filter input and output side it
Between electromagnetic coupling can all influence the authenticity of insert loss.
As shown in Figure 1, being mounted on the schematic diagram in the darkroom EMC 70 for shield facility three-phase four-wire power filter 100.Fig. 1
In, 60 be control room；40 be the power import of filter, i.e. the input terminal of filter；50 be the outlet through walls of filter, that is, is filtered
The output end of wave device.11-11 ', 12-12 ', 13-13 ' and 14-14 ' are four branches of filter respectively, meet power supply system respectively
Three phase lines and middle line of system.Whether shield facility power-supply filter is researched and developed or produced, inserting for this kind of filter will be measured
Enter loss.
Fig. 2 is the outline drawing of certain model shield facility power-supply filter.In Fig. 2,99 be the metallic shield of filter；97 are
The junction box cover plate of filter output；96 be the junction box cover plate of filter input end；40 be that cable enters filter input
Terminate the stuffing-box of wire box.
Junction box cover plate 96,97 in Fig. 2 is taken away, just at the outline drawing of Fig. 3.Originally, junction box cover plate 97 in Fig. 2
With junction box cover plate 96 cover be filter both ends square hole, it be for convenience cable connection to each branch of filter
11-11 ', 12-12 ', 13-13 ' and 14-14 ' bolt terminal and be arranged.But can only see in Fig. 3 branch terminal 11,
12 and 13 bolt.It is finished to cable connection, the junction box cover plate 96 and junction box cover plate 97 at both ends will be installed to original position, guarantee
Electromagnetic coupling between filter input and output port is controlled to extremely low level.
In order to further appreciate that the bolt terminal of filter, it is cut away the top of Fig. 3, filter is rotated 180 degree, obtains figure
4.4 branch 11-11 ', 12-12 ', 13-13 ' and the 14-14 ' of filter can be seen in this way, and all 8 bolt ends
The distribution situation of son.
The structure of bolt terminal is shown in Fig. 5.In Fig. 5,21 be bolt, it is exactly each branch of shield facility power-supply filter
The position that input or output end cable are attached thereto, the other end of bolt just connect filter circuit；22 be fastener nut；23 are
Spring washer；24 be plain washer；25 be insulator.Bolt terminal is fixed on by insulator 25 metallic shield 99 of filter
On, guarantee being electrically insulated between the bolt 21 of filter and the metallic shield 99 of filter.
Fig. 6 A and Fig. 6 B are the modular designs for " scheming B.3 punching element test case " in standard GB/T7343 page 30.Figure
The function of square hole 98 is similar to the square hole that junction box cover plate 97,96 is pushed down in Fig. 2 in 6A and Fig. 6 B, is exactly to filter for convenience
Device connection and be arranged.Bolt 21 in Fig. 5 is equivalent to the component 121 in Fig. 6 A and Fig. 6 B.Insulator 25 in Fig. 5 is with regard to phase
When the component 125 in Fig. 6 A and Fig. 6 B.If can pacify in the metallic shield at shield facility power-supply filter shown in Fig. 2 both ends
Radio frequency connector 101 in Fig. 6 is filled, is connect with measuring instruments such as vector network analyzers, filter is also can be carried out in this way and inserts
Enter the measurement of loss.But do not allow to operate in this way on filter product, because setting radio frequency connector destroys filter
Electromagnetic isolation between wave device input and output side, also destroys the insertion loss of filter.
Summary of the invention
It is provided the object of the present invention is to provide a kind of by standard GB/T7343, not only economic but also convenient shield facility power supply
The auxiliary device of filter insertion loss measurement.
In order to achieve the above object, the technical solution of the present invention is to provide a kind of insertions of measurement shield facility power-supply filter
A kind of aided measurement device of loss, which is characterized in that including hollow copper post body one, the lower ending opening of copper post body one, upper end
It is closed by copper sheet, after the aided measurement device is installed in place, is had between the lower end of copper post body one and the metallic shield of filter
There is good electrical connection；Copper sheet is equipped with RF connector；Copper nut cylinder is equipped in copper post body one, copper nut cylinder passes through conducting wire
It is connected with the inner conductor of RF connector, after the aided measurement device is installed in place, the input terminal of filter or the spiral shell of output end
Bolt terminal is protruded into copper post body one and is interlocked with copper nut cylinder, so that RF connector is connected to the defeated of filter
Enter end or output end；Insulator is equipped between copper nut cylinder and the inner wall of copper post body one.
Preferably, the copper sheet and the copper post body one integrated molding or the copper sheet are fixed on described by connector
The upper end of copper post body one or the copper sheet are welded and fixed with the copper post body one.
Preferably, the RF connector is Male head connector or is female connector.
Preferably, N layers of wire washer, N are equipped between the lower end of the copper post body and the metallic shield of filter
≥1；Or the copper post body lower end and filter the metallic shield between be equipped with M layers of wire washer, M >=2, in institute
It states and is equipped with copper post body two between the wire washer of the wire washer and the copper post body in metallic shield.
Preferably, the insulator is connected and fixed by connector and the copper sheet；The insulator by connector with
The side of the copper post body one is connected and fixed.
Preferably, be equipped with baffle in the copper post body one, the copper nut cylinder and the insulator be located at baffle and
Between the copper sheet, the input terminal of filter or the bolt terminal of output end are engaged in after baffle with copper nut cylinder
Together, baffle is used to that the copper nut cylinder to be prevented to be subjected to displacement during occlusion with the bolt terminal.
Preferably, the baffle passes through the multiple connector latched positions being circumferentially threaded through on the copper post body.
The big and heavy feature for shield facility power-supply filter, the present invention provide a kind of subsidiary dress of low cost
It sets, can easily and accurately be measured by insertion loss of the standard GB/T7343 to shield facility power-supply filter.The present invention is set
A kind of auxiliary test unit by standard GB/T7343 measurement shield facility power-supply filter insertion loss of meter, it can be by mark
Quasi- GB/T7343 regulation carry out insertion loss measurement, and can highly desirable control filter output and input between may
Existing electromagnetic isolation.
Detailed description of the invention
Fig. 1 is the shield facility power-supply filter for being mounted on the darkroom EMC；
Fig. 2 is the outside drawing of shield facility power-supply filter；
Fig. 3 is the input for removing shield facility power-supply filter, exports two square holes seen after cover board；
Fig. 4 is the eight bolt terminals and imported fill letter, output device through walls that can see shield facility power-supply filter clearly
Cross-sectional view；
Fig. 5 is the bolt end subgraph of shield facility power-supply filter；
The modular design for scheming B.3 punching element test case that Fig. 6 A and Fig. 6 B are standard GB/T7343；
Fig. 7 A and Fig. 7 B are the cross-sectional view of standard GB/T7343 insert loss auxiliary device embodiment 1；
Fig. 8 A and Fig. 8 B are the hexagonal copper nut cylinder view in Fig. 7 A and Fig. 7 B；
Fig. 9 A and Fig. 9 B are the insulation stereogram in Fig. 7 A and Fig. 7 B；
Figure 10 is to measure certain shield facility power-supply filter not with standard GB/T7343 insert loss auxiliary device
Symmetrical insertion loss；
Figure 11 is pair that certain shield facility power-supply filter is measured with standard GB/T7343 insert loss auxiliary device
Claim insertion loss；
Figure 12 A and Figure 12 B are the cross-sectional view of standard GB/T7343 insert loss auxiliary device embodiment 2.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
As shown in figs. 7 a and 7b, slotting to be carried out by standard GB/T7343 to shield facility power-supply filter in the present embodiment
Enter a kind of auxiliary device of loss measurement, it is specially the ruler small in ends of filter in Fig. 3 that it, which selects the RF connector of 50 ohm of SMA,
Very little square hole and design.When measuring insertion loss to shield facility power-supply filter by standard GB/T7343, it is desirable that figure
The auxiliary device of 7A and Fig. 7 B can be realized with 8 bolt terminals in Fig. 4 and is electrically connected.If the auxiliary in Fig. 7 A and Fig. 7 B
It is the SMA connector 201 of female on device, it will also connect with the cable (being not drawn into figure) equipped with SMA male connector, just be able to achieve
Tested filter bolt terminal is electrically connected with measuring instrument.In design, it is necessary to which the size and cable of SMA male connector cable are permitted
Perhaps the size that deformation occurs is taken into account.
50 ohm of SMA connector 201 is installed to above copper sheet 203 by screw 202.The outer diameter of copper sheet 203 is
42mm.Copper sheet 203 is fixed on copper post body 205 by screw 206.The outer diameter of copper post body 205 is 42mm, internal diameter 34mm.Peace
It is attached to the lower end of the copper post body 205 of the auxiliary device of this standard GB/T7343 insert loss of position, is filtered in Yao Nengyu Fig. 5
The metallic shield 99 of wave device has good electrical connection.
The inner conductor of SMA connector 201 is electrically connected via welding lead 216 with the realization of hexagonal copper nut cylinder 208.Hexagonal
Copper nut cylinder 208 is shown in Fig. 8 A and Fig. 8 B, its section is consistent with the outer dimension of national standard M6 nut.Hexagonal copper nut cylinder
208 long 18mm, side view lower end about 7mm are processed as the nut of national standard, and end part is processed into the hole of diameter 9mm thereon.
Hexagonal copper nut column 208 in Fig. 8 A and Fig. 8 B is placed in insulator 207 shown in Fig. 7 A and Fig. 7 B.Insulator
207 be the production of ABS material 3D printing technique, and the structure of insulator 207 is shown in Fig. 9 A and Fig. 9 B.3 2.4mm in Fig. 9 B
Hole machined be M3 screw hole because 3D printing cannot form screw hole.By 3 screws 212 shown in Fig. 7 B, Fig. 7 A and figure
Insulator 207 shown in 7B is fixed on copper sheet 203.4 circular holes intersected in Fig. 9 B with hexagon are fabrication holes.
The hexagonal copper nut cylinder 208 in Fig. 7 A and Fig. 7 B is in the bolt terminal with filter shown in fig. 5 in order to prevent
Occlusion during be subjected to displacement, be provided with baffle 209.Baffle 209 is the annulus that insulating materials is made into, center bore 8mm,
Thickness is 3mm, is locked with 3 M3 screws 210 of 205 side of copper post body.
In Fig. 7 A and Fig. 7 B, copper sheet 203 can be connected with copper post body 205 with welding method, can also be processed integral
's.
On the one hand, when 205 lower end of copper post body can have good be electrically connected with the metallic shield 99 of the filter in Fig. 5；Separately
On the one hand, the inner conductor of SMA connector 201 connects hexagonal copper nut cylinder 208 by conducting wire 216, stings with the bolt 21 in Fig. 5
It is combined, so, SMA connector 201 has connected to input or the output end of filter.Shown in Fig. 7 A and Fig. 7 B
Standard GB/T7343 insert loss auxiliary device realizes Fig. 6 A and Fig. 6 B test box modular design control filter input
Whole elements of electromagnetic coupling that may be present between output.
One auxiliary device is mounted on the terminal 11 in Fig. 4, another auxiliary device is assemblied in the terminal 11 ' in Fig. 4,
It can be according to the survey for carrying out asymmetric insertion loss in standard GB/T7343 shown in Fig. 7 of page 11 to filter branches 11-11 '
Amount.
4 auxiliary devices shown in Fig. 7 A and Fig. 7 B are assembled to the bolt terminal 11,11 ', 12 and 12 ' in Fig. 4 simultaneously
It above, can be according to the symmetrical insertion shown in Fig. 6 in GB/T7343 page 10, between measurement filter 11-11 ' and 12-12 '
Loss.
And so on, just it is capable of measuring 4 asymmetric insertion loss and 6 of 3 phase, 4 phase shield facility power-supply filter in Fig. 1
The symmetrical insertion loss curve of item.
In order to contain squareness tolerance of the bolt 21 relative to the metallic shield 99 of filter in Engineering Error, such as Fig. 5；
For another example hexagonal copper nut cylinder 208 is embedded in the tolerance etc. that insulator 207 generates in Fig. 7 A and Fig. 7 B, in practical application, in Fig. 7
Between the metallic shield 99 of the filter of the lower end and Fig. 5 of middle copper post body 205, it to be inserted into thickness 2mm, an outer diameter 45mm, internal diameter
The wire washer (commercially available) of 34mm, telescopicing performance is splendid.There is its buffering, is able to achieve copper post in Fig. 7 A and Fig. 7 B
The perfect electrical connection of the metallic shield 99 of filter in the lower end of body 205 and Fig. 5, so as to standard shown in Fig. 7 A and Fig. 7 B
The auxiliary device port of GB/T7343 insert loss and the electromagnetic coupling control of other port of wave filter are to lower than 100dB's
Level guarantees accurate, efficient, reliable by the insert loss of standard GB/T7343 measurement shield facility power-supply filter.Figure
10 be the asymmetric insertion loss curve that SNF710-4X32 shield facility power-supply filter is measured with above-mentioned auxiliary device, Figure 11
For the symmetrical insertion loss curve for measuring SNF710-4X32 shield facility power-supply filter with above-mentioned auxiliary device.
According to size recited above, the M6 bolt 21 suitable for Fig. 5 of this auxiliary device shown in Fig. 7 A and Fig. 7 B is arrived
The distance of filter masks is the occasion of 23.5-35mm (washer of wire containing 2mm).
Embodiment 2
For the shield facility power-supply filter of high current, the bolt terminal in Fig. 5 may be M8, M10 or M12.Company, institute
The cable that connects is thick and hard, cable it is difficult to install.So aiming at installation cable in Fig. 3 and designing, positioned at filter both ends
Two rectangular pore sizes will increase, and specially devise another money in Figure 12 A and Figure 12 B thus and measure by standard GB/T7343 and shield
Cover the auxiliary device of utility power filter insertion loss.
201 ' in Figure 12 A and Figure 12 B be that 50 ohm of N-type RF connectors are changed due to the limited area of copper sheet 203
The fixation position of insulator 207, it is fixed by the screw 212 for being located at 205 side of copper post body.
Hexagonal copper nut cylinder 208 and insulator 207 in Figure 12 A and Figure 12 B are the profile arrangements by M12,
In not changing hexagonal copper nut cylinder 208 under the principle of the outer dimension of M12, it is designed to the hexagonal copper spiral shell of M8 and M10
Female cylinder, their outer dimension is consistent, and only threaded hole is respectively M8, M10 and M12.Such design need to only make one
Auxiliary device shown in four Figure 12 A and Figure 12 B is covered, the hexagonal copper nut cylinder 208 of different screw threads is replaced when needing, it can be complete
It is measured at the symmetrical and asymmetric insertion loss that bolt in Fig. 5 is the shield facility power-supply filter of M8, M10 and M12.
Remaining definition in Figure 12 A and Figure 12 B is identical as Fig. 7 A and Fig. 7 B.
As a height of 55mm of copper post body 205 in Figure 12 A and Figure 12 B, 207 height of insulator is 40mm, and 209 thickness of baffle is
3mm, when the washer of wire containing 2mm, the spiral shell of Figure 12 A and Figure 12 this auxiliary device of B M8, M10 and M12 suitable for Fig. 5
The occasion that the distance of bolt 21 to filter masks is 23.5-38.5mm.
In the application, be likely encountered bolt 21 in Fig. 5 to filter masks distance beyond Fig. 7 A and Fig. 7 B and Figure 12 A and
At this moment the dimension limit that Figure 12 B can be accommodated has following two selection that can cope with: one) increase copper post body and filter
The number of wire washer between metallic shield；Secondly) wire washer in the metallic shield 99 of Fig. 5 filter and connection
Between the wire washer of copper post body 205, as soon as being inserted into the suitable copper post body of section size, can lengthen can test shield facility electricity
The length of source filter input or output bolt.
Claims (7)
1. measuring a kind of aided measurement device of shield facility power-supply filter insertion loss, which is characterized in that including hollow
Copper post body one, the lower ending opening of copper post body one, upper end are closed by copper sheet, after the aided measurement device is installed in place, copper post body
There is good be electrically connected between one lower end and the metallic shield of filter；Copper sheet is equipped with RF connector；In copper post body one
Equipped with copper nut cylinder, copper nut cylinder is connected by conducting wire with the inner conductor of RF connector, the aided measurement device installation
After in place, the input terminal of filter or the bolt terminal of output end are protruded into copper post body one and are interlocked with copper nut cylinder,
So that RF connector is connected to the input terminal or output end of filter；Between copper nut cylinder and the inner wall of copper post body one
Equipped with insulator.
2. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as described in claim 1, special
Sign is that the copper sheet and the copper post body one integrated molding or the copper sheet are fixed on the copper post body one by connector
Upper end or the copper sheet be welded and fixed with the copper post body one.
3. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as described in claim 1, special
Sign is that the RF connector is Male head connector or is female connector.
4. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as described in claim 1, special
Sign is, N layers of wire washer, N >=1 are equipped between the lower end of the copper post body and the metallic shield of filter；Or
M layers of wire washer, M >=2, in the metal screen are equipped between the lower end of the copper post body and the metallic shield of filter
Copper post body two is equipped between the wire washer of the wire washer and the copper post body that cover.
5. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as described in claim 1, special
Sign is that the insulator is connected and fixed by connector and the copper sheet；The insulator passes through connector and the copper post
The side of body one is connected and fixed.
6. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as described in claim 1, special
Sign is, baffle is equipped in the copper post body one, the copper nut cylinder and the insulator are located at baffle and the copper sheet
Between, the input terminal of filter or the bolt terminal of output end are interlocked after baffle with copper nut cylinder, keep off
Plate is used to that the copper nut cylinder to be prevented to be subjected to displacement during occlusion with the bolt terminal.
7. a kind of aided measurement device of measurement shield facility power-supply filter insertion loss as claimed in claim 6, special
Sign is that the baffle passes through the multiple connector latched positions being circumferentially threaded through on the copper post body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499486.0A CN110376442B (en) | 2019-06-11 | 2019-06-11 | Auxiliary measuring device for measuring insertion loss of power filter of shielding facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499486.0A CN110376442B (en) | 2019-06-11 | 2019-06-11 | Auxiliary measuring device for measuring insertion loss of power filter of shielding facility |
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| CN110376442A true CN110376442A (en) | 2019-10-25 |
| CN110376442B CN110376442B (en) | 2021-06-11 |
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| CN201601201U (en) * | 2010-02-02 | 2010-10-06 | 南京广顺网络通信设备有限公司 | Communication product connector |
| US20110281461A1 (en) * | 2009-02-01 | 2011-11-17 | Yantel Corporation | Coaxial connector |
| CN102792530A (en) * | 2010-04-08 | 2012-11-21 | 凯瑟雷恩工厂两合公司 | Wall-shaped high-frequency assembly |
| CN203521813U (en) * | 2013-10-29 | 2014-04-02 | 成都九华圆通科技发展有限公司 | Adjustable radio frequency coaxial connector |
| CN203786213U (en) * | 2014-04-24 | 2014-08-20 | 成都工业学院 | Emi filter loading insertion loss automatic test system |
| CN109557381A (en) * | 2018-12-12 | 2019-04-02 | 上海埃德电子股份有限公司 | A kind of symmetrical insert loss system of passive EMC filter |
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2019
- 2019-06-11 CN CN201910499486.0A patent/CN110376442B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110281461A1 (en) * | 2009-02-01 | 2011-11-17 | Yantel Corporation | Coaxial connector |
| CN201601201U (en) * | 2010-02-02 | 2010-10-06 | 南京广顺网络通信设备有限公司 | Communication product connector |
| CN102792530A (en) * | 2010-04-08 | 2012-11-21 | 凯瑟雷恩工厂两合公司 | Wall-shaped high-frequency assembly |
| CN203521813U (en) * | 2013-10-29 | 2014-04-02 | 成都九华圆通科技发展有限公司 | Adjustable radio frequency coaxial connector |
| CN203786213U (en) * | 2014-04-24 | 2014-08-20 | 成都工业学院 | Emi filter loading insertion loss automatic test system |
| CN109557381A (en) * | 2018-12-12 | 2019-04-02 | 上海埃德电子股份有限公司 | A kind of symmetrical insert loss system of passive EMC filter |
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