CN207516448U - The preferable screening factor test system of communication cable - Google Patents
The preferable screening factor test system of communication cable Download PDFInfo
- Publication number
- CN207516448U CN207516448U CN201721262486.1U CN201721262486U CN207516448U CN 207516448 U CN207516448 U CN 207516448U CN 201721262486 U CN201721262486 U CN 201721262486U CN 207516448 U CN207516448 U CN 207516448U
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- China
- Prior art keywords
- test system
- screening factor
- card slot
- metal material
- factor test
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 238000012216 screening Methods 0.000 title claims abstract description 55
- 238000004891 communication Methods 0.000 title claims abstract description 51
- 239000007769 metal material Substances 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Preferable screening factor the utility model is related to communication cable tests system, including two metal material clamping devices, a wherein metal material clamping device is connect with one end of the electric current frame of preferable screening factor test system by collets, and another metal material clamping device is directly connected to electric current frame；Each metal material clamping device is respectively provided with polygon clamping opening, and the both ends that two metal material clamping devices treat the metal sheath of detection communication cable by respective polygon clamping opening respectively are clamped.The preferable screening factor test system and its measuring method of the communication cable of the utility model, reduce the contact resistance of cable to be detected, and test primary voltage is high, range of regulation is wide, the defects of measuring accuracy for overcoming former test circuit is low, and error is big substantially increases test quality and product quality.
Description
Technical field
The present invention relates to the preferable screening factor test systems in wireline test field, more particularly to communication cable.
Background technology
The metal sheath of communication cable not only has certain mechanical performance, sealing performance and Corrosion Protection, but also has
There is certain shielding external electromagnetic field interference.The coat of metal of communication cable and armor are grounded, just can be shielded
From transmission line of electricity and other external electromagnetic field interference.The preferable screening factor of so-called communication cable just assumes that cable gold
Screening factor when belonging to the ground resistance of sheath equal to zero (ideal grounding requirement).Measure and calculate the various gold of communication cable
Belong to the preferable shielding character of protective layer, this is for communication cable circuit protection transmission line of electricity, electric railway and radio station etc.
It interferes significant.
In the prior art, the measuring circuit of the preferable screening factor of communication cable is with measuring accuracy is low, voltage is low, pressure regulation
The defects of narrow range, big error.
Invention content
The purpose of the present invention is to solve at least one of problem above, the present invention provide a kind of cable metal protective layer and
The test system of the preferable screening factor of armor.
The preferable screening factor test system of a kind of communication cable, including two metal material clamping devices, wherein a gold medal
The one end for belonging to material clamping device with the electric current frame of preferable screening factor test system is connect by collets, another metal material
Matter clamping device is directly connected to electric current frame.
Each metal material clamping device is respectively provided with polygon clamping opening, and two metal material clamping devices are respectively by respective
Polygon clamping opening treat the both ends of metal sheath of detection communication cable and clamped so that preferable screening factor tests system
Form current path.
Wherein, metal material clamping device includes card slot frame and card slot, and the distance of card slot frame and card slot is adjustable, card slot
The opposite end of frame and card slot is equipped with the notch of adaptation, and when card slot is inserted into card slot frame, two notches dock to form polygon
Clamping opening.
Wherein, two notches are V-type, and polygon clamping opening is quadrangle clamping opening.
Wherein, preferable screening factor test system further includes test frame, and card slot frame is fixedly connected with test frame, card
Slot is slidably connected by adjusting screw and test frame.
Wherein, preferable screening factor test system further includes the pressure regulation for increasing preferable screening factor test system voltage
Device and step-up transformer and the current transformer for monitoring preferable screening factor test system power, pressure regulator and boosting become
Depressor is connected with the power supply of preferable screening factor test system, and current transformer tests the ammeter of system with preferable screening factor
It is in parallel.
Wherein, metal material clamping device further includes handle, the screw connection of handle and adjusting screw.
The preferable screening factor test system of the communication cable of the present invention is by setting elastic adjustable metal material to clamp
Mechanism can realize the accurate clamping of the communication cable of various models to thickness unevenness, form optimal clamping scheme, improve
System is to the measuring accuracy of screening factor.In addition, the primary voltage by improving test, overcomes that measuring accuracy is low, and error is big
The test defect of traditional circuits is waited, substantially increases test quality and product quality.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 shows the circuit diagram of the preferable screening factor test system of the prior art；
Fig. 2 shows the circuits that system is tested according to the preferable screening factor of the communication cable of the utility model embodiment
Schematic diagram；
Fig. 3 shows the metal that system is tested according to the preferable screening factor of the communication cable of the utility model embodiment
Material clamping device is to the clamping schematic diagram of communication cable to be detected；
Fig. 4 shows the metal that system is tested according to the preferable screening factor of the communication cable of the utility model embodiment
The schematic diagram of material clamping device.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure, and can be by this public affairs on the contrary, providing these embodiments
The range opened completely is communicated to those skilled in the art.
Communication cable circuit is when or friendship parallel with transmission line of electricity is got over, under the action of alternation point magnetic field, often through logical
The coupled capacitor and coupling inductance of letter circuit and transmission line of electricity generate electromagnetic interference to communication cable circuit and jeopardize the peace of communication
Entirely.The metal sheath (including armor and coat of metal) of communication cable is grounded, just can be shielded from transmission line of electricity and outer
The interference of electromagnetic field.The preferable screening factor of so-called communication cable just assumes that the ground resistance of the metal sheath of cable is equal to zero
Screening factor when (i.e. ideal grounding requirement).
According to international standard communication cable test method, the wiring side of the test system of the preferable screening factor of communication cable
Case is as shown in Figure 1.The standard test system includes variable-voltage power supply 1, strong current transformer 2, collets 3, electric current frame 4, voltage
Circuit measures line 5, communication cable to be detected, Voltage loop 7, electric current loop 8, and voltage circuit measures line 5 and is arranged at electric current frame 4
Near.
In the standard test system, the effect of strong current transformer 2 is to generate high current in circuit, so as to make cable
Generate induced voltage.Electric current frame 4 is capable of the conductivity of simulation buried cable very well.Electric current loop will plate silver brain clip by insulated conductor
Ring is formed with cable connection, ensures it with smaller indeclinable contact resistance.Distance L between two silver-plated clamp rings1=1m.
At this point, the induced voltage on cable is V, longitudinal disturbed voltage is V ＇.The preferable screening factor r=V/ of communication cable to be detected
V ＇.
In existing standard test system, for clamping the silver-plated clamp ring of communication cable to be detected and the electricity to be detected that communicates
The metal sheath of cable need to be connected by insulated conductor, since the contact resistance between insulated conductor and communication cable is difficult to control,
The problem of contact resistance is excessive is susceptible to, so as to influence the precision of entire test circuit.
Based on problem above, the present invention provides a kind of novel bindiny mechanisms to replace silver-plated clamp ring, can be directly with treating
The metal sheath for detecting communications optical cable is connected, and ensure extremely low contact resistance, improves the measuring accuracy of whole system.
The present invention provides a kind of preferable screening factor test system of completely new communication cable, should as shown in Fig. 2 and Fig. 3
Test system includes two metal material clamping devices 210, and one of metal material clamping device is surveyed with preferable screening factor
One end of the electric current frame 4 of test system is connected by collets 3, and another metal material clamping device directly connects with electric current frame 4
It connects；Two metal material clamping devices 210 have polygon clamping opening 2101, and two metal material clamping devices 210 pass through respectively
When polygon clamping opening 2101 clamps the both ends of the metal sheath of communication cable 100 to be detected, the periphery of metal sheath is inscribed within
Polygon clamping opening 2101, two metal material clamping devices 210 form current path with metal sheath.
Two metal material clamping devices are equivalent to the silver-plated clamp ring of the prior art, in the present invention, two metal materials
The directly clamping both ends exposure of clamping device 210 has the communication cable to be detected of metal sheath, and directly with metal sheath point contact,
The form of this contact, reduces contact resistance, can improve the measuring accuracy of circuit.
As shown in figure 4, each metal material clamping device 210 includes card slot frame 2110 and card slot 2120, card slot frame
The distance of frame 2110 and card slot 2120 is adjustable, and the opposite end of card slot frame 2110 and card slot 2120 is equipped with the notch of adaptation, works as card
When slot frame 2110 and close card slot 2120, two notches dock to form polygon clamping opening, and metal material clamping device passes through folder
Mouth is realized communication cable and is clamped.In a specific embodiment, the notch of the notch of card slot frame 2110 and card slot 2120
It is V-type, the clamping opening of formation is quadrangle.
In addition, the distance between card slot frame 2110 and card slot 2120 is adjustable, and then the clamping opening formed clamps communication cable
Elasticity it is adjustable, the optimal clamping scheme of minimum contact resistance can be realized by above-mentioned adjusting.
Preferable screening factor test system further includes test frame, and card slot frame 2110 is fixedly connected with test frame, card
Slot 2120 is slidably connected by adjusting screw and test frame, and positioned at the side of card slot frame 2110.The screw of adjusting screw
One end be fixed with handle, driven by the turn of handle and adjust the flexible of screw, carry out realizing card slot 2120 and card slot frame
2110 clamping and release.
In addition, the measuring accuracy to further improve test system, can increase the adjustable range for testing system voltage.Specifically
Method is, based on above-mentioned standard test system, adds in the pressure regulator 9 for increasing test voltage and boosting within the system
Transformer 10 and the current transformer 11 for monitoring and test electric current, specifically as shown in Fig. 2, pressure regulator 9 and step-up transformer
10 connect with power supply, and current transformer 11 is in parallel with the ammeter 12 of test circuit.
In addition, the preferable screening factor test system of communication cable can also set self-locking control circuit 14, to testing system
It plays a protective role.The preferable screening factor test system of communication cable can also set the startup of control test system and stopping to press
Button and adjusting pressuring knob start and are used to control the pressure regulation of test system with the switch that stop button is test system, adjusting pressuring knob
Device 9 adjusts the voltage of the variable-voltage power supply of test system.
The metal conducting layer of conventional communication cable includes metal layer and armor, therefore the gold of the communication cable of the present invention
It is the coat of metal and armor to contact with each other to belong to sheath, the method packet that it is tested using test system of the invention
Include following steps：
S1：The external sheath layer at the both ends of communication cable to be detected is removed, by the both ends of the armor of communication cable to be tested
Exposure.
S2：The inner protective layer between armor and coat of metal of communication cable to be tested is removed, makes armor
It contacts with each other to form metal sheath with coat of metal.
S3：The two of the metal sheath of the communication cable to be detected are clamped with two metal material clamping devices 210
End so that metal sheath and two metal material clamping devices 210 form current path.
S4：Start preferable screening factor test circuit, according to the display result and ideal of preferable screening factor test circuit
Screening factor calculation formula calculates the preferable screening factor of communication cable to be tested.
Below by taking general communication cable X1 as an example, this test system is described in detail, the step of screening factor detection is carried out to it
Suddenly.Wherein general communication cable X1 ecto-entads successively include external protection, armor, inner protective layer, coat of metal and
Cable core.Detecting step specifically includes：
About 1300mm is sampled from tested cable；Sample both ends each layer of outer jacket is peelled off into 150mm.
Armor at the 115mm of sample both ends is peelled off；Remove inner protective layer layer, ensure armor both ends 60mm place and
Coat of metal contact is good.
Coat of metal at the 95mm of sample both ends is peelled off, and clean out, exposes cable core, is chosen close to cable core axis
A cable core as measure conductor.
The card slot of metal material clamping device is adjusted, communication cable to be detected is accessed into test circuit.
Start test circuit, using two ac millivoltmeters 12 respectively to the induced voltage V and longitudinal disturbed voltage of cable
V ＇ are measured.
Pressure regulator knob is adjusted, after the display numerical stability of two ac millivoltmeters, display numerical value is write down, according to formula
R=V/V ＇ determine the numerical value of preferable screening factor r.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (6)
1. the preferable screening factor test system of communication cable, which is characterized in that the ideal screening factor test system includes
Two metal material clamping devices (210), wherein a metal material clamping device tests the electric current of system with preferable screening factor
One end of frame (4) is connected by collets (3), and another metal material clamping device is directly connected to the electric current frame (4)；
Each metal material clamping device (210) is respectively provided with polygon clamping opening (2101), described two metal material clamping devices
(210) both ends of the metal sheath of communication cable to be detected are pressed from both sides by the respective polygon clamping opening (2101) respectively
It holds so that the ideal screening factor test system forms current path.
2. ideal screening factor test system as described in claim 1, which is characterized in that
The metal material clamping device (210) includes card slot frame (2110) and card slot (2120), the card slot frame
(2110) and the distance of the card slot (2120) is adjustable, and the opposite end of the card slot frame (2110) and the card slot (2120) is set
Have the notch of adaptation, when the card slot (2120) be inserted into card slot frame (2110) when, two notches dock to be formed it is described more
Side clevis mouth (2101).
3. ideal screening factor test system as claimed in claim 2, which is characterized in that
Two notches are V-type, and the polygon clamping opening is quadrangle clamping opening.
4. ideal screening factor test system as claimed in claim 2, which is characterized in that
The ideal screening factor test system further includes test frame, and the card slot frame (2110) is consolidated with the test frame
Fixed connection, the card slot (2120) are slidably connected by adjusting screw and the test frame (1).
5. ideal screening factor test system as described in claim 1, which is characterized in that
Preferable screening factor test system further includes the pressure regulator (9) for increasing the preferable screening factor test system voltage
Current transformer (11) with step-up transformer (10) and for monitoring the preferable screening factor test system power, it is described
Pressure regulator (9) and step-up transformer (10) are connected with the power supply of the preferable screening factor test system, the current transformer
(11) it is in parallel with the ammeter of the preferable screening factor test system.
6. ideal screening factor test system as claimed in claim 4, which is characterized in that
The metal material clamping device (210) further includes handle, and the handle is connect with the screw of the adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721262486.1U CN207516448U (en) | 2017-09-28 | 2017-09-28 | The preferable screening factor test system of communication cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721262486.1U CN207516448U (en) | 2017-09-28 | 2017-09-28 | The preferable screening factor test system of communication cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207516448U true CN207516448U (en) | 2018-06-19 |
Family
ID=62534024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721262486.1U Expired - Fee Related CN207516448U (en) | 2017-09-28 | 2017-09-28 | The preferable screening factor test system of communication cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207516448U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656158A (en) * | 2017-09-28 | 2018-02-02 | 江苏通鼎光电科技有限公司 | Preferable the screening factor test system and its measuring method of communication cable |
| CN109444655A (en) * | 2018-12-17 | 2019-03-08 | 深圳市国人射频通信有限公司 | A kind of test equipment |
-
2017
- 2017-09-28 CN CN201721262486.1U patent/CN207516448U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656158A (en) * | 2017-09-28 | 2018-02-02 | 江苏通鼎光电科技有限公司 | Preferable the screening factor test system and its measuring method of communication cable |
| CN107656158B (en) * | 2017-09-28 | 2024-05-17 | 江苏通鼎光电科技有限公司 | Ideal shielding coefficient test system for communication cable and its measuring method |
| CN109444655A (en) * | 2018-12-17 | 2019-03-08 | 深圳市国人射频通信有限公司 | A kind of test equipment |
| CN109444655B (en) * | 2018-12-17 | 2023-08-01 | 深圳国人科技股份有限公司 | Test equipment |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180619 |
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| CF01 | Termination of patent right due to non-payment of annual fee |