CN202837452U - Line-finding instrument for finding network cables connected on switchboard and router - Google Patents
Line-finding instrument for finding network cables connected on switchboard and router Download PDFInfo
- Publication number
- CN202837452U CN202837452U CN 201220380136 CN201220380136U CN202837452U CN 202837452 U CN202837452 U CN 202837452U CN 201220380136 CN201220380136 CN 201220380136 CN 201220380136 U CN201220380136 U CN 201220380136U CN 202837452 U CN202837452 U CN 202837452U
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- router
- switch
- signal source
- resistance
- netting twine
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Abstract
The utility model discloses a line-finding instrument for finding network cables connected on a switchboard and a router. A signal transmitter comprises four test modules. Each test module comprises a positive-going signal source, a reverse signal source and a resistor R. one end of the resistor R is connected with an inductor inside an interface of the switchboard and the router, and the other end of the resistor R is connected with the reverse signal source. In addition, the resistance value of the resistor R is more than 10 times than the sum of the impedance of the inductor inside the interface of the switchboard or the router and the impedance of a network cable to be found. In comparison with the prior art, as the resistor having the resistance value far more than the sum of the impedance of the inductor inside the interface of the switchboard or the router and the impedance of the network cable to be found is added in a test loop, voltage of a test signal is fundamentally loaded on the network cable to be found when the line-finding instrument for finding the network cable connected on switchboard and router is used. Therefore, the network cable can be accurately found.
Description
Technical field
The utility model relates to cable detection technique field, relates more specifically to a kind of hunting instrument be used to searching the netting twine that is connected on switch, the router.
Background technology
Along with developing rapidly of network and the communications industry, communication and network capacity are how much quantity to be increased, and the difficulty of wiring also further improves.And in the wiring installation and daily servicing engineering of network cable, the communications cable, in order to find rapidly, fast and accurately required cable in numerous wire harness cables, the hunting instrument arises at the historic moment.
Existing hunting instrument generally comprises signal projector and signal receiver, its principle of work is: tested cable is accessed on the general-purpose interfaces such as RJ45/RJ11/BNC of described signal projector, utilize described signal projector to tested cable audio signals, so that loop, described tested cable place around produce one around signal field, again with the close tested cable of described signal receiver, the sound signal that whether detects the signal field that described tested cable produces by described signal receiver judges whether to find netting twine (detect sound signal and represent that this cable is the netting twine that need to search, otherwise then be not).
But, when described hunting instrument is used for searching netting twine on the equipment such as being connected to switch, router, because switch, the inductive impedance of router interface inside and the impedance of netting twine are about 100 Europe, so just, cause the test signal decay excessive, thereby can't find out exactly the netting twine of equipment such as being connected to switch, router.
Therefore, be necessary to provide a kind of hunting instrument improved, that be used for searching the netting twine that is connected on switch, the router to overcome defects.
The utility model content
The purpose of this utility model provides a kind of hunting instrument be used to searching the netting twine that is connected on switch, the router, and it can search the netting twine of equipment such as being connected to switch, router exactly.
For achieving the above object, the utility model provides a kind of hunting instrument be used to searching the netting twine that is connected on switch, the router, comprises signal projector and the signal receiver that is connected with described signal projector.Wherein, described signal projector comprises four groups of test modules, each described test template comprises the forward signal source, reverse signal source and a resistance R, one end and the switch of described resistance R, the internal inductance of router interface connects, the other end of described resistance R is connected with described reverse signal source, and the resistance of described resistance R is the inductive impedance of described switch or router interface inside and more than ten times of impedance sum of netting twine to be found, described forward signal source, netting twine to be found, described switch, the internal inductance of router interface, resistance R and described reverse signal source form a loop.
Compared with prior art, because the utility model comprises the signal testing module for the signal projector of the hunting instrument of searching the netting twine that is connected on switch, the router, described signal testing module comprises forward signal source, reverse signal source and a resistance R, one end of described resistance R is connected with the internal inductance of switch, router interface, the other end of described resistance R is connected with described reverse signal source, and the resistance of described resistance R is the inductive impedance of described switch or router interface inside and more than ten times of impedance sum of netting twine to be found; During use, the voltage of test signal substantially all loads on netting twine to be found, thereby can find out exactly described netting twine.
Particularly, the resistance of described resistance R is more than or equal to 10K Ω.
Particularly, described forward signal source, opposite direction identical with the reverse signal source frequency.
By following description also by reference to the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used for explaining embodiment of the present utility model.
Description of drawings
Fig. 1 is hunting instrument one embodiment that the utility model is used to search the netting twine that is connected on switch, the router synoptic diagram when being applied to switch.
Fig. 2 is the circuit theory diagrams of Fig. 1.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, similar element numbers represents similar element in the accompanying drawing.As mentioned above, the utility model provides a kind of and has been connected to switch be used to searching, the hunting instrument of the netting twine on the router, owing to be used for searching being connected to switch, the signal receiver of the hunting instrument of the netting twine on the router comprises the signal testing module, described signal testing module comprises the forward signal source, reverse signal source and a resistance R, one end and the switch of described resistance R, the internal inductance of router interface connects, the other end of described resistance R is connected with described reverse signal source, and the resistance of described resistance R is the inductive impedance of described switch or router interface inside and more than ten times of impedance sum of netting twine to be found; During use, the voltage of test signal substantially all loads on netting twine to be found, thereby can find out exactly described netting twine.
Please refer to Fig. 1, one preferred embodiment 100 of the hunting instrument be used to searching the netting twine that is connected on switch, the router of the present utility model comprises signal projector 10 and the signal receiver 12 that is connected with described signal projector 10, one end of netting twine 200 to be found is connected in the RJ45 interface of the equipment such as switch, router three 00, and the other end is connected in described signal projector.
Particularly, please refer to Fig. 2, described signal projector 10 comprise among four signal testing module 101(figure only show one), the RJ45 interface of switch or router has four groups of inductance, eight inner core 1-8 of netting twine 200 to be found are divided into four groups (12 be one group, 34 be one group, 56 to be one group, 78 be one group), and the two ends of netting twine 200 to be found are connected to four groups of inductance T1-T4 of RJ45 interface of switch or router three 00 and four signal testing modules 101 of described signal projector 10.Each described signal testing module 101 comprises forward signal source V1, reverse signal source V2 and a resistance R, one end and the switch of described resistance R, the internal inductance of router three 00 interface connects, the other end of described resistance R is connected with described reverse signal source V2, and the resistance of described resistance R is the inductive impedance of described switch or router three 00 interface inside and more than ten times of impedance sum of netting twine 200 to be found, described forward signal source V1 is identical with reverse signal source V2 frequency, opposite direction, described forward signal source V1, netting twine 200 to be found, described switch, the internal inductance of router interface 300, resistance R and described reverse signal source V2 form a loop.
In the present embodiment, the interface impedance of described switch, router three 00 and the impedance of netting twine 200 are about 100 Europe, and the resistance of described resistance R is more than or equal to 10K Ω.
Principle of work of the present utility model is as follows: forward signal source V1 emission forward signal arrives the RJ45 interface of switch or router three 00 through the inner core 1 of netting twine 300 to be found, reverse signal source V2 emission reverse signal is through resistance R, the inner core 2 of netting twine 300 to be found is to the RJ45 interface of switch or router three 00, because the RJ45 port inside of described switch or router three 00 is an inductance, forward signal source V1 is opposite with reverse signal V2 frequency equidirectional, therefore, forward signal source V1, netting twine 200 inner cores 1 to be found, the RJ45 internal inductance of switch or router, netting twine inner core 2 to be found, reverse signal source V2 forms the loop.Again because 100 meters netting twine to be found 200 and the RJ45 interface internal inductance impedance sum of switch or router three 00 are 200 Europe, described resistance R is 10K, so the signal intensity that is carried on the netting twine to be found 300 is | V1-V2|/[10000/(10000+200)]=| V1-V2|/1.2, the voltage that is test signal substantially all loads on netting twine to be found 300, thereby can utilize described signal receiver 12 to find out exactly described netting twine.
Abovely in conjunction with most preferred embodiment the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model.
Claims (3)
1. one kind is used for searching being connected to switch, the hunting instrument of the netting twine on the router, comprise signal projector and the signal receiver that is connected with described signal projector, it is characterized in that: described signal projector comprises four groups of test modules, each described test template comprises the forward signal source, reverse signal source and a resistance R, one end and the switch of described resistance R, the internal inductance of router interface connects, the other end of described resistance R is connected with described reverse signal source, and the resistance of described resistance R is the inductive impedance of described switch or router interface inside and more than ten times of impedance sum of netting twine to be found, described forward signal source, netting twine to be found, described switch, the internal inductance of router interface, resistance R and described reverse signal source form a loop.
2. the hunting instrument be used to searching the netting twine that is connected on switch, the router as claimed in claim 1, it is characterized in that: the resistance of described resistance R is more than or equal to 10K Ω.
3. the hunting instrument be used to searching the netting twine that is connected on switch, the router as claimed in claim 1 is characterized in that: described forward signal source, opposite direction identical with the reverse signal source frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380136 CN202837452U (en) | 2012-08-01 | 2012-08-01 | Line-finding instrument for finding network cables connected on switchboard and router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220380136 CN202837452U (en) | 2012-08-01 | 2012-08-01 | Line-finding instrument for finding network cables connected on switchboard and router |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202837452U true CN202837452U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220380136 Expired - Lifetime CN202837452U (en) | 2012-08-01 | 2012-08-01 | Line-finding instrument for finding network cables connected on switchboard and router |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202837452U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911412A (en) * | 2016-04-16 | 2016-08-31 | 扬州利恩网络科技有限公司 | Cable searching apparatus for cable testing |
-
2012
- 2012-08-01 CN CN 201220380136 patent/CN202837452U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911412A (en) * | 2016-04-16 | 2016-08-31 | 扬州利恩网络科技有限公司 | Cable searching apparatus for cable testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |