CN100414803C - Lightening arresting method and device for Ethernet port - Google Patents
Lightening arresting method and device for Ethernet port Download PDFInfo
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- CN100414803C CN100414803C CNB021253870A CN02125387A CN100414803C CN 100414803 C CN100414803 C CN 100414803C CN B021253870 A CNB021253870 A CN B021253870A CN 02125387 A CN02125387 A CN 02125387A CN 100414803 C CN100414803 C CN 100414803C
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Abstract
The present invention discloses a thunder prevention method for an Ethernet port and a device thereof, wherein the method comprises the steps that a current releasing path of instantaneous high voltage is arranged between the differential lines of the differential pair, and the current releasing path in the most front stage of a prevention circuit is provided by a gas discharge tube; the high voltage produced by thunder and high static voltage between the differential lines can be released by the current releasing path of instantaneous high voltage; the rear stage of the differential circuit adopts a varistor and a TVS tube to process voltage clamping; residual voltage after passing through the gas discharge tube is clamped to a lower voltage value by the varistor and the TVS tube to realize the protection of the rear stage circuit. The thunder prevention device comprises the receiving differential line pair, the sending differential line pair and the current releasing path of instantaneous high voltage; the current releasing path of instantaneous high voltage is respectively connected between the receiving differential line pair and the sending differential line pair. The present invention is mainly used for thunder prevention of the Ethernet, and has advantages of high safety, low cost and flexible network organizing.
Description
Technical field
The present invention relates to lightning protection device, particularly a kind of lightening arresting method of ethernet port and device thereof.
Background technology
Along with the construction energetically of domestic broadband metropolitan area network, the increasing access device that adopts Ethernet switch as the user in enterprise network and the broadband cell.Along with the expansion and the deterioration of switch applied environment, particularly in corridor, use, Carrier Requirements improves the security performance of ethernet port, increases the port lightning protection capability, to satisfy the needs of the reliable long journey of equipment.
The ethernet port that has lightning protection function can resist thunderbolt, antistatic, supports more abominable network environment, effectively improves the fail safe of the network equipment and other electric equipment, therefore in the middle of enterprise network and wide-band networking application, more and more comes into one's own.
Current, also there are not other effective ethernet port lightning protection means on the market.In the concrete networking, ethernet device can only adopt the buried construction means do strick precaution to a certain degree that waits to natural calamities such as thunderbolt, high-pressure electrostatics.The shortcoming of this mode is:
1, poor stability.Adopt the mode of buried netting twine, generally can only protect up going port or other important ethernet user's interface, the netting twine of other interface is still open-air, and therefore the danger of thunderbolt and static still exists.
2, cost height.All there is the high situation of human and material resources cost in general construction means, and prolongs the construction period toward contact.
Summary of the invention
The object of the present invention is to provide a kind of method and device thereof of Ethernet lightning protection, with the fail safe that improves network, reduce cost etc.
Method of the present invention is:
The current drain path of instantaneous high pressure is provided between the right differential lines of differential lines; Wherein, described said current dumping path adopts the mode of two-stage protection;
The high voltage that produces because of thunder and lightning, high-pressure electrostatic between differential lines is discharged it by the current drain path of described instantaneous high pressure.
According to said method: described two-stage protected mode is meant: between prime differential lines and back level differential lines, be connected prime protection device and back level protection device respectively, and between this prime protection device and back level protection device the series impedance device.
Described prime protection device is the air discharge tube that is connected between the prime differential lines, and described back level protection device is the voltage clamp bit-type Transient Suppression Diode that is connected between the level differential lines of back, and described impedance device is a piezo-resistance.
Described current drain channel setting is outside ethernet port or be arranged on level behind the ethernet port.
Lightning protection device of the present invention comprises:
Receive differential lines to, send differential lines to the current drain circuit of instantaneous high pressure; Wherein,
The current drain circuit of described instantaneous high pressure comprises: the prime protection device that is connected with the prime differential lines, the back level protection device that is connected with back level differential lines and the impedance device of connecting between this prime protection device and back level protection device.
According to above-mentioned lightning protection device: described prime protection device is that air discharge tube, a back level protection device are voltage clamp bit-type Transient Suppression Diode, and described impedance device is a piezo-resistance.
Described differential lines is electrically connected a plug or slot respectively to two ends, is connected with miscellaneous equipment with convenient.
Effect of the present invention:
1, safe: as on ethernet device, to adopt built-in or outside lightning-protection module design, can reliably reduce equipment lightning damage probability.Can also effectively avoid simultaneously other electric equipment to cause that Keep Clear-High Voltage, and avoid other electric equipment caused that Keep Clear-High Voltage.
2, cost is low: adopt the present invention, can reduce engineering construction amounts such as ditching, reduce networking cost.
3, networking flexibility: adopt the present invention, ethernet device can be matched lightning-protection module or circuit according to the actual requirements, adapts to complicated network environment.Also be convenient to network management and maintenance in addition.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the circuit theory diagrams of another structure of the present invention,
Fig. 3 is the circuit theory diagrams of the another structure of the present invention.
Fig. 4 is the networking diagram of lightning protection device of the present invention in the ethernet device outside;
Fig. 5 is the networking diagram of lightning protection device of the present invention in ethernet device inside.
Embodiment
The present invention is the current drain path that instantaneous high pressure is provided between the right differential lines of Ethernet differential lines, when between the differential lines in the Ethernet because of thunder and lightning, when high-pressure electrostatic produces high voltage, current drain path by instantaneous high pressure discharges it, to prevent that thunder and lightning or high-pressure electrostatic from entering ethernet device inside, damage circuit and device.
With reference to figure 1, differential lines rx
+, rx
-With differential lines tx
+, tx
-Between connect voltage clamp bit-type Transient Suppression Diode (Transient Voltage Suppressor, be called for short TVS pipe) VD1 and VD2 respectively.TVS pipe VD1 and VD2 are integrated in the pipe, and its model is SLVU2_8.4.Two pairs of gang socket that differential lines is right or plug are connected with miscellaneous equipment with convenient.The TVS pipe is a kind of FV, is to utilize the nonlinear characteristic of device with the protection of overvoltage clamper to a lower magnitude of voltage realization to late-class circuit.When producing instantaneous pressure because of thunder and lightning etc. between the differential lines, it is clamped that the TVS pipe carries out high pressure, and this structure is carried out the single-stage protection to the 10/100BASE-T ethernet port.
With reference to figure 2, schematic structure then is to discharge path with air discharge tube as high voltage, and the model of air discharge tube is 3r097cxa_2.Air discharge tube is a kind of switching mode protection device, and operation principle is a gas discharge.When two interpolar voltages were enough big, the pole clearance was converted into conduction state with discharge breakdown by original state of insulation, similar short circuit.The voltage that two interpolars are kept under the conduction state is very low, generally at 20～50V, therefore can play the effect of protection late-class circuit.The high voltage that the main release electrostatic of this structure etc. causes.
With reference to figure 3; schematic structure adopts voltage clamp bit-type Transient Suppression Diode (Transient VoltageSuppressor; be called for short the TVS pipe) and air discharge tube as the current drain path and the voltage clamping circuit of instantaneous high pressure, the 10/100BASE-T ethernet port is carried out two-stage protection.Differential lines rx
+, rx
-With differential lines tx
+, tx
-Between connect air discharge tube G1 and G2, TVS pipe VD1 and VD2 respectively.The model of TVS pipe is SLVU2_8.4, and the model of air discharge tube is 3r097cxa_2.Adopt high-power piezo-resistance R1, R2, R3 and the R4 of 2W to be connected between TVS pipe and the air discharge tube.
Piezo-resistance is a kind of votage limit type protection device.Utilize the nonlinear characteristic of piezo-resistance, when overvoltage appears at two interpolars of piezo-resistance, piezo-resistance can be with voltage clamp to a relatively-stationary magnitude of voltage.
When producing high pressure between differential lines, air discharge tube two interpolar voltages are enough big, and the pole clearance is converted into conduction state with discharge breakdown by original state of insulation, similar short circuit.The voltage that two interpolars are kept under the conduction state is very low, generally at 20～50V.Piezo-resistance and TVS pipe are with overvoltage clamper to a lower magnitude of voltage, thereby realization is to the protection of late-class circuit.
Fig. 4 is the networking diagram that lightning-protection module is placed on the ethernet device outside.Whole lightning-protection module is connected outside the ethernet port, promptly between network interface connector RJ45 and the subscriber equipment PC, makes independent lightning protection device.
Fig. 5 is that lightning-protection module is arranged on level behind the port, promptly between network interface connector RJ45 and the net mouth transformer, becomes the part of ethernet device.
The present embodiment lightning protection device mainly protects the sending and receiving differential lines of 10/100BASE-T Ethernet interface right.Adopt described method of invention or device, ethernet device port maximum can be resisted the transient current of 10KA, and circuit is reliable and stable simultaneously, can satisfy the networking needs of ethernet device fully.
Claims (7)
1. the lightening arresting method of an ethernet port is characterized in that:
The current drain path of instantaneous high pressure is provided between the right differential lines of differential lines; Wherein, described current drain path adopts the mode of two-stage protection; Described two-stage protected mode is meant: between prime differential lines and back level differential lines, be connected prime protection device and back level protection device respectively, and between this prime protection device and back level protection device the series impedance device; The high voltage that produces because of thunder and lightning, high-pressure electrostatic between differential lines is discharged it by the current drain path of described instantaneous high pressure.
2. method according to claim 1; it is characterized in that; described prime protection device is the air discharge tube that is connected between the prime differential lines, and described back level protection device is the voltage clamp bit-type Transient Suppression Diode that is connected between the level differential lines of back, and described impedance device is a piezo-resistance.
3. according to the described method of one of claim 1 to 2, it is characterized in that described current drain channel setting is outside ethernet port.
4. according to the described method of one of claim 1 to 2, it is characterized in that described current drain channel setting is level behind ethernet port, become the part of ethernet device.
5. the lightning protection device of an ethernet port is characterized in that, comprising: receive differential lines to, send differential lines to the current drain circuit of instantaneous high pressure; Wherein,
The current drain circuit of described instantaneous high pressure comprises: the prime protection device that is connected with the prime differential lines, the back level protection device that is connected with back level differential lines and the impedance device of connecting between this prime protection device and back level protection device.
6. lightning protection device according to claim 5 is characterized in that, described prime protection device is that air discharge tube, back level protection device are voltage clamp bit-type Transient Suppression Diode, and described impedance device is a piezo-resistance.
7. according to the described lightning protection device of one of claim 5 to 6, it is characterized in that described differential lines is electrically connected a plug or slot respectively to two ends, be connected with miscellaneous equipment with convenient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021253870A CN100414803C (en) | 2002-07-30 | 2002-07-30 | Lightening arresting method and device for Ethernet port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021253870A CN100414803C (en) | 2002-07-30 | 2002-07-30 | Lightening arresting method and device for Ethernet port |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1472859A CN1472859A (en) | 2004-02-04 |
| CN100414803C true CN100414803C (en) | 2008-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021253870A Expired - Fee Related CN100414803C (en) | 2002-07-30 | 2002-07-30 | Lightening arresting method and device for Ethernet port |
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| CN (1) | CN100414803C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247236B (en) * | 2008-03-19 | 2010-07-21 | 杭州华三通信技术有限公司 | Ethernet power receiving equipment and its protection method |
| CN101477881B (en) * | 2008-10-14 | 2011-06-15 | 华为终端有限公司 | Lightning protection transformer and lighting protection method for transformer |
| CN101719665B (en) * | 2009-12-24 | 2013-02-20 | 迈普通信技术股份有限公司 | Ethernet port lightning protection device and lightning protection circuit |
| CN102593816A (en) * | 2012-03-06 | 2012-07-18 | 深圳市海鹏信电子股份有限公司 | Surge protection device of gigabit active Ethernet |
| CN102684181A (en) * | 2012-05-14 | 2012-09-19 | 江苏中科梦兰电子科技有限公司 | Anti-static and lightning-prevention dual protection circuit |
| CN102723706B (en) * | 2012-05-30 | 2015-08-19 | 武汉烽火网络有限责任公司 | PoE port overvoltage integrated protection circuit and its implementation |
| CN103515942B (en) | 2012-06-28 | 2017-12-22 | 中兴通讯股份有限公司 | The protection circuit of communication interface |
| CN103297700A (en) * | 2013-06-04 | 2013-09-11 | 四川艾普视达数码科技有限公司 | Lightening-preventing web camera |
| CN108882059A (en) * | 2017-05-10 | 2018-11-23 | 内江师范学院 | A kind of 10M/100M local area network distributing frame lightening arresting method |
| CN107623316A (en) * | 2017-10-12 | 2018-01-23 | 郑州云海信息技术有限公司 | A kind of server port lightning preventing hits design method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115226A (en) * | 1998-12-07 | 2000-09-05 | Cisco Technology, Inc. | Apparatus for lightning strike survivability and post-strike operability |
| CN1359182A (en) * | 2001-12-31 | 2002-07-17 | 深圳安圣电气有限公司 | Signal lightning protector |
-
2002
- 2002-07-30 CN CNB021253870A patent/CN100414803C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6115226A (en) * | 1998-12-07 | 2000-09-05 | Cisco Technology, Inc. | Apparatus for lightning strike survivability and post-strike operability |
| CN1359182A (en) * | 2001-12-31 | 2002-07-17 | 深圳安圣电气有限公司 | Signal lightning protector |
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| CN1472859A (en) | 2004-02-04 |
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