CN101285861A - Wire rod test device and its test method - Google Patents
Wire rod test device and its test method Download PDFInfo
- Publication number
- CN101285861A CN101285861A CNA2007100276007A CN200710027600A CN101285861A CN 101285861 A CN101285861 A CN 101285861A CN A2007100276007 A CNA2007100276007 A CN A2007100276007A CN 200710027600 A CN200710027600 A CN 200710027600A CN 101285861 A CN101285861 A CN 101285861A
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- wire rod
- metal tube
- signal receiver
- electromagnetic
- heart yearn
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Abstract
The invention provides a device for testing wire rod. The device is used to test the electromagnetic screen performance of a tested wire rod with a core thread, a screen layer coated outside the core thread and a coat covered the screen layer; moreover, one end of the core thread and both ends of the screen layer are earthed. The testing device comprises a signal receiver and a long and narrow electromagnetic generator closed around the tested wire rod, wherein the signal receiver has a receiving end connected with the other end of the core thread of the tested wire rod as well as an output end; one end of the electromagnetic generator is connected with the output end of the signal receiver, while the other end is earthed. Because the electromagnetic generator is closed around the tested wire rod, the signal receiver sends electric signal to ensure that the electromagnetic generator generates an electromagnetic field, thereby directly testing the electromagnetic interference screening performance of the screen layer in the wire rod.
Description
Affiliated technical field
The present invention relates to a kind of wire rod test device and method of testing thereof, relate in particular to a kind of proving installation and method of testing thereof that the shield effectiveness of wire internal screen layer is tested.
Background technology
All the time do not exist electromagnetic interference in our living environment, and electromagnetic interference is very big to the influence of electronic product, so all need the test of process electromagnetic interference shield performance earlier before each electronic product dispatches from the factory.But the wire rod series products for a long time, need be treated to be made into finished product after terminal is assembled at the wire rod two ends, can be connected to proving installation carries out various anti-electromagnetic interference performances to integral product test.
If before the wire rod assembling, just can test at the shielding properties of wire rod itself, not only can grasp the quality of wire rod itself, the shielding properties reference of wire rod can also be provided for the design of follow-up wire product, be convenient to carry out in advance analysis and improvement, also be more conducive to relatively the wire product structure analysis to wire product.So, provide a kind of proving installation that can directly test very necessary to the shielding properties of wire rod.
Summary of the invention
Purpose of the present invention provide at above-mentioned defective a kind of can be with regard to direct proving installation and the method for testing thereof that the shielding properties of the screen layer of wire rod own is tested before wire product assembling.
For reaching above-mentioned purpose, the invention provides a kind of wire rod test device, this wire rod test device, can test and have heart yearn, be coated on the outer screen layer of heart yearn and coat the capability of electromagnetic shielding of tested wire rod of the outer quilt of screen layer, an end of the heart yearn of this tested wire rod and the two ends of screen layer are ground connection all.This proving installation comprises a signal receiver, and this signal receiver has a receiving end and an output terminal that is connected with the other end of the heart yearn of tested wire rod; And the electromagnetic generator of a long and narrow tested wire rod of encirclement, an end of this electromagnetic generator is connected with the output terminal of signal receiver, the other end ground connection of electromagnetic generator.
Method of testing of the present invention may further comprise the steps:
At first, tested wire rod is put in the metal tube, metal tube one end is connected other end ground connection with the output terminal of a signal receiver;
Secondly, with an end of described tested wire rod heart yearn and the two-terminal-grounding of screen layer, the other end of described tested wire rod heart yearn is connected with the receiving end of signal receiver;
Then, make the output terminal of signal receiver send an electric signal, the electric charge on metal tube surface is changed, thereby in metal tube, form electromagnetic field;
Then, receive electromagnetic induction signal in the electromagnetic field that heart yearn forms by the signal receiver receiving end in metal tube;
At last, analyze the performance of wire rod internal shield shield electromagnetic interference by signal receiver.
As mentioned above, owing to surround tested wire rod and signal receiver generates an electromagnetic field electromagnetic generator by electromagnetic generator, thereby can directly test the performance of the screen layer shield electromagnetic interference in the wire rod, to judge the shielding properties of tested wire rod for signal, so by above-mentioned proving installation of the present invention and method, can before the wire product assembling, just can directly learn the shielding properties of wire rod self screen layer, for subsequent product analysis and exploitation provide more detail parameters, also be more conducive to relatively the wire product structure analysis.
Description of drawings
In Figure of description:
Fig. 1 is the synoptic diagram after the assembling of proving installation of the present invention;
Fig. 2 is the sectional view after wire rod is positioned in the metal tube in the proving installation of the present invention.
The description of reference numerals of each element is as follows among the figure:
Network tester 10 output terminals 11
Receiving end 12 wire rods 20
Outward by 23 metal tubes 30
Embodiment
For describing technology contents of the present invention, structural attitude, the purpose that is realized and effect in detail, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 1, wire rod test device of the present invention comprises that a signal receiver and an electromagnetic generator form, and this signal receiver can be a network tester 10 in the present embodiment, and network tester 10 has output terminal 11 and receiving end 12; Electromagnetic generator then is a metal tube 30.Near the place, two ends connector 301 is installed respectively on the metal tube 30.Be connected with a test cable 302 between the connector 301 of metal tube 30 1 ends and the output terminal 11 of network tester 10, the connector 301 of the other end of metal tube 30 is ground connection then.Network tester 10 is by constituting the loop between transmitting terminal 11, metal tube 30 and the ground, the signal of transmitting terminal 11 emissions of network tester 10 changes the electric charge on metal tube 30 surfaces, thereby make electromagnetic field of metal tube 30 inner formation, to constitute needed test environment.
Please continue with reference to Figure 1 and Figure 2, in the present invention, tested wire rod 20 is positioned in the metal tube 30, wire rod 20 is by the heart yearn 21 of innermost layer, be coated on the outer screen layer 22 of heart yearn 21 and be coated on outermost outer by 23 form, the length of wire rod 20 is a bit larger tham the length of metal tube 30, so that expose outside the metal tube 30 at the two ends of wire rod 20, the heart yearn 21 of one end of wire rod 20 is connected with the receiving end 12 of network tester 10 by another test cable 302, the heart yearn 21 of the other end of wire rod 20 is ground connection then, simultaneously with two ends 22 ground connection of the screen layer in the wire rod 20, to constitute receiving unit.
Please continue with reference to shown in Figure 1, method of testing of the present invention is as follows:
At first, tested wire rod 20 is put into metal tube 30, the connector 301 of an end of metal tube 30 is connected with the output terminal 11 of network tester 10 by a test cable 302, with connector 301 ground connection of the other end of metal tube 30;
Secondly, an end of wire rod 20 heart yearns 21 and the receiving end 12 of network tester 10 are linked together by another test cable 302, the other end of wire rod 20 heart yearns 21 is ground connection then, and ground connection is also distinguished at the two ends of the screen layer 22 in the wire rod 20 simultaneously;
Then, make the transmitting terminal 11 of network tester 10 send electric signal, the electric signal that sends changes the electric charge on metal tube 30 surfaces, thereby forms electromagnetic field in metal tube 30;
Then, the receiving end 12 by network tester 10 receives the electric signal that the heart yearn 21 in the wire rod 20 is sensed;
At last, by the record result of network tester 10, judge the screen effect of 22 pairs of electromagnetic interference (EMI) of these wire rod 20 internal shields with the power of analyzing the electric signal of being sensed in the electromagnetic field of heart yearn 21 in metal tube 30.
As mentioned above, owing to generate an electromagnetic field by metal tube 30, thereby can directly test the performance of screen layer 21 shield electromagnetic interference in the wire rod 20, so can before wire product assembling, just can learn the quality of wire rod 20 self shield effectiveness, for subsequent product analysis and exploitation provide more detail parameters, also be more conducive to relatively the wire product structure analysis.
Claims (5)
1. wire rod test device, be used to test and have heart yearn, be coated on the outer screen layer of heart yearn and coat the capability of electromagnetic shielding of tested wire rod of the outer quilt of screen layer, one end of the heart yearn of this tested wire rod and the two-terminal-grounding of screen layer, it is characterized in that, this proving installation comprises: a signal receiver has a receiving end and an output terminal that is connected with the other end of the heart yearn of tested wire rod; And the electromagnetic generator of a long and narrow tested wire rod of encirclement, an end of this electromagnetic generator is connected with the output terminal of signal receiver, the other end ground connection of electromagnetic generator.
2. wire rod test device according to claim 1 is characterized in that: this signal receiver is a network tester.
3. wire rod test device according to claim 2 is characterized in that: described electromagnetic generator is a metal tube.
4. wire rod test device according to claim 3, it is characterized in that: the place, two ends of described metal tube is equipped with connector respectively, be connected with a test cable between the connector of metal tube one end and the output terminal of network tester, the connector ground connection of the metal tube other end.
5. wire test method, this method of testing may further comprise the steps:
At first, tested wire rod is put in the metal tube, metal tube one end is connected other end ground connection with the output terminal of a signal receiver;
Secondly, with an end of described tested wire rod heart yearn and the two-terminal-grounding of screen layer, the other end of described tested wire rod heart yearn is connected with the receiving end of signal receiver;
Then, the output terminal of signal receiver sends an electric signal, the electric charge on metal tube surface is changed, thereby form electromagnetic field in metal tube;
Then, receive electromagnetic induction signal in the electromagnetic field that heart yearn forms by the signal receiver receiving end in metal tube;
At last, analyze the performance of wire rod internal shield shield electromagnetic interference by signal receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100276007A CN101285861A (en) | 2007-04-13 | 2007-04-13 | Wire rod test device and its test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100276007A CN101285861A (en) | 2007-04-13 | 2007-04-13 | Wire rod test device and its test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101285861A true CN101285861A (en) | 2008-10-15 |
Family
ID=40058172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100276007A Pending CN101285861A (en) | 2007-04-13 | 2007-04-13 | Wire rod test device and its test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101285861A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399038A (en) * | 2012-02-29 | 2013-11-20 | 苹果公司 | Device and method for testing flexible cable shielding layer |
| CN107966618A (en) * | 2017-11-28 | 2018-04-27 | 广州广电计量检测股份有限公司 | Data cable shield effectiveness detection circuit and method |
| CN111722015A (en) * | 2020-08-10 | 2020-09-29 | 广州广电计量检测股份有限公司 | Three-coaxial testing method for bare wire of aviation airborne shielding cable |
-
2007
- 2007-04-13 CN CNA2007100276007A patent/CN101285861A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399038A (en) * | 2012-02-29 | 2013-11-20 | 苹果公司 | Device and method for testing flexible cable shielding layer |
| CN103399038B (en) * | 2012-02-29 | 2017-02-22 | 苹果公司 | Device and method for testing flexible cable shielding layer |
| CN107966618A (en) * | 2017-11-28 | 2018-04-27 | 广州广电计量检测股份有限公司 | Data cable shield effectiveness detection circuit and method |
| CN107966618B (en) * | 2017-11-28 | 2020-08-28 | 广州广电计量检测股份有限公司 | Data line shielding effectiveness detection circuit and method |
| CN111722015A (en) * | 2020-08-10 | 2020-09-29 | 广州广电计量检测股份有限公司 | Three-coaxial testing method for bare wire of aviation airborne shielding cable |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081015 |