CN104167724B - A kind of isolation type bidirectional signal of communication lightning protection device - Google Patents
A kind of isolation type bidirectional signal of communication lightning protection device Download PDFInfo
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- CN104167724B CN104167724B CN201410454198.0A CN201410454198A CN104167724B CN 104167724 B CN104167724 B CN 104167724B CN 201410454198 A CN201410454198 A CN 201410454198A CN 104167724 B CN104167724 B CN 104167724B
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Abstract
The present invention relates to lightning protection device technical field, a kind of isolation type bidirectional signal of communication lightning protection device, including lightning protection circuit, active isolation circuit and power supply circuit are disclosed；Lightning protection circuit includes first and second gas-discharge tube GDT1, GDT2, high-speed rectifier pipe D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal meets isolation input end reference ground GND2 and connects lightning proof ground by second gas discharge tube GDT2 by first gas discharge tube GDT1 and Transient Suppression Diode TVS respectively, current-limiting resistance R1 is connected in series between first gas discharge tube GDT1 and Transient Suppression Diode TVS, and high-speed rectifier pipe D3 and first gas discharge tube GDT1 is in star-like connection；Active isolation circuit includes magnetic coupling signal transceiver U1, signal transceiver U2 and monostable flipflop U3.The lightning of tens thousand of volts is sensed the present invention pulse voltage for being reduced to hundreds of volts by lightning protection circuit, then the pulse voltage of hundreds of volts is reduced into power supply voltage by active isolation circuit so that the residual voltage of product reach it is minimum.
Description
Technical field
The present invention relates to lightning protection device technical field, more specifically, more particularly to a kind of isolation type bidirectional signal of communication is prevented
Thunder device.
Background technology
Existing shocking preventing technology is all that the voltage difference between each line is limited within certain level by non-linear element,
But because all elements have certain actuation time, a tool still can be formed between each line of lightning protection device when lightning is sensed to be come
The pulse voltage for having very high voltage cannot be eliminated；Ultimately result in product protection failure.Therefore, it is necessary to design a kind of new structure
Lightning protection device solving problems of the prior art.
The content of the invention
It is an object of the invention to provide a kind of isolation type bidirectional signal of communication lightning protection device for eliminating pulse voltage.
In order to solve posed problems above, the technical solution adopted by the present invention is：A kind of isolation type bidirectional signal of communication
Lightning protection device, it includes lightning protection circuit, the active isolation circuit being connected with lightning protection circuit and the confession being connected with active isolation circuit
Circuit；Wherein, the lightning protection circuit includes first and second gas-discharge tube GDT1, GDT2, high-speed rectifier pipe D3, transient state suppression
Diode TVS processed and current-limiting resistance R1, each signal passes through first gas discharge tube GDT1 and Transient Suppression Diode TVS respectively
Meet isolation input end reference ground GND2 and lightning proof ground is connect by second gas discharge tube GDT2, the current-limiting resistance R1 is connected in series
Between first gas discharge tube GDT1 and Transient Suppression Diode TVS, the high-speed rectifier pipe D3 and first gas discharge tube
GDT1 is in star-like connection；The active isolation circuit includes magnetic coupling signal transceiver U1, signal transceiver U2, and is connected to magnetic
Monostable flipflop U3 between coupling signal transceiver U1 and signal transceiver U2.
According to a preferred embodiment of the invention：The monostable flipflop U3 is two, is both connected to magnetic coupling signal receipts
Between hair device U1 and signal transceiver U2.
According to a preferred embodiment of the invention：The power supply circuit includes the transformer T being sequentially connected and direct current conversion
Circuit, the DC converting circuit includes rectifier bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, the transformer output end and rectification
Bridge D1 is connected, and the filter capacitor C3 and voltage-stabiliser tube D2 is parallel to the output end of rectifier bridge D1.
According to a preferred embodiment of the invention：The DC converting circuit is two groups, one of which DC converting circuit
Output end be connected with magnetic coupling signal transceiver U1, monostable flipflop U3, wherein another group of output end of DC converting circuit
It is connected with signal transceiver U2.
According to a preferred embodiment of the invention：The pins of magnetic coupling signal transceiver U1 the 6th, the 7th pin, Yi Jixin
12nd pin and the 13rd pin of number transceiver U2 are connected to the two ends of a resistance R3 by a resistance R2.
Compared with prior art, the beneficial effects of the present invention are：The present invention is by the lightning protection circuit of front end by tens thousand of volts
Lightning sensing be reduced to the pulse voltage of hundreds of volts, then by the magnetic coupling transceiver of active isolation circuit by the pulse of hundreds of volts
Voltage is reduced to power supply voltage so that the residual voltage of product reach it is minimum, while internal use not parallel wiring rule,
Parasitic capacitance between line is allowed to reduce, so as to improve data signal transmission performance.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of isolation type bidirectional signal of communication lightning protection device of the invention.
Fig. 2 is the circuit diagram of lightning protection circuit in isolation type bidirectional signal of communication lightning protection device of the invention.
Fig. 3 is the circuit diagram of active isolation circuit in isolation type bidirectional signal of communication lightning protection device of the invention.
Fig. 4 is the circuit diagram of power supply circuit in isolation type bidirectional signal of communication lightning protection device of the invention.
Specific embodiment
The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Refering to shown in Fig. 1, a kind of isolation type bidirectional signal of communication lightning protection device that the present invention is provided, it includes lightning protection circuit,
The active isolation circuit being connected with lightning protection circuit and the power supply circuit being connected with active isolation circuit.
Refering to shown in Fig. 2, lightning protection circuit of the present invention includes first and second gas-discharge tube GDT1, GDT2, high
Fast rectifying tube D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal respectively by first gas discharge tube GDT1 and
Transient Suppression Diode TVS meets isolation input end reference ground GND2 and connects lightning proof ground by second gas discharge tube GDT2, described
Current-limiting resistance R1 is connected in series between first gas discharge tube GDT1 and Transient Suppression Diode TVS, described high-speed rectifier
Pipe D3 and first gas discharge tube GDT1 is in star-like connection.
The operation principle of the lightning protection circuit is：When lightning current, lightning voltage pass through lightning protection device of the invention, lightning protection device leads to
The mode for crossing earial drainage pressure limiting protects follow-up equipment, is first acted by the Transient Suppression Diode TVS of fast response time, causes current limliting electricity
There is voltage at resistance R1 two ends, and at this moment the voltage at gas-discharge tube two ends is current-limiting resistance R1 and Transient Suppression Diode TVS two ends
Voltage sum, configures corresponding component, gas-discharge tube is reached breakdown voltage, makes high current from first gas discharge tube
GDT1 is discharged, and limitation voltage is carried out by Transient Suppression Diode TVS, so that protection equipment, what the rectifying tube in circuit was designed
Full-bridge rectification, main purpose is to play a part of to reduce parasitic capacitance and the connection of conductive line line.
Refering to shown in Fig. 3, heretofore described active isolation circuit includes magnetic coupling signal transceiver U1, signal transceiver
U2, and the monostable flipflop U3 between magnetic coupling signal transceiver U1 and signal transceiver U2 is connected to, wherein, monostable is touched
Hair device U3 is two, is both connected between magnetic coupling signal transceiver U1 and signal transceiver U2, in magnetic coupling signal transceiver U1 the
Six pins, the 7th pin, and the 12nd pin and the 13rd pin of signal transceiver U2 are connected by a resistance R2
At the two ends of a resistance R3.
The operation principle of the active isolation circuit is：Two-way communication signals pass through magnetic coupling signal transceiver U1 by thunder-lightning
Road part fail eliminate high-voltage pulse isolated, magnetic coupling signal transceiver U1 output voltage peak by power supply circuit electricity
Source voltage is determined, and two-way communication signals are converted to controlled unidirectional receiving and transmitting signal, and unidirectional receiving and transmitting signal passes through again
Signal transceiver U2 is converted to two-way communication signals and is exported, and is received between two transceivers and passes through two monostable triggers with hair
Device U3 is controlled, and the resistance R2 in the support circuit of periphery is used to prevent transceiver puncture short, and resistance R3 is terminal coupling electricity
Resistance, resistance R4 is the pull-up resistor of U1 chip PV pins, and electric capacity C1 is decoupling capacitor, and resistance R5 is used to determine monostable flipflop
The A pin input states of U3, resistance R6 and electric capacity C2 composition RC circuits are used to adjust the transmission rate of circuit.
Refering to shown in Fig. 4, heretofore described power supply circuit includes the transformer T being sequentially connected and direct current conversion electricity
Road, the DC converting circuit includes rectifier bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, the transformer output end and rectifier bridge
D1 is connected, and the filter capacitor C3 and voltage-stabiliser tube D2 is parallel to the output end of rectifier bridge D1.
Preferably, described DC converting circuit is two groups, output end and the magnetic coupling of one of which DC converting circuit
Signal transceiver U1, monostable flipflop U3 are connected, wherein another group of output end of DC converting circuit and signal transceiver U2
Connection.
The operation principle of the power supply circuit is：220V alternating currents are converted to two groups mutually isolated low by transformer T
Voltage AC, this two groups of alternating currents pass through rectifier bridge D1 rectifications respectively, are by the voltage conversion of floating by filter capacitor C3
Direct current, and galvanic output voltage values are determined by voltage-stabiliser tube D2.Two groups of direct currents of independence of final output are believed for magnetic coupling
The input of number transceiver U1, output and other circuits provide isolated DC power supply.
The lightning sensing of tens thousand of volts is reduced to the present invention pulse voltage of hundreds of volts due to the lightning protection circuit by front end,
The pulse voltage of hundreds of volts is reduced to by power supply voltage by the magnetic coupling transceiver of active isolation circuit again, so that producing
The residual voltage of product reaches minimum, while internal use not parallel wiring rule, allows parasitic capacitance between line to reduce, so as to improve data letter
Number transmission performance.
Above-described embodiment is the present invention preferably implementation method, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (4)
1. a kind of isolation type bidirectional signal of communication lightning protection device, it is characterised in that：Including lightning protection circuit, what is be connected with lightning protection circuit has
Source isolation circuit and the power supply circuit being connected with active isolation circuit；Wherein, the lightning protection circuit includes the first and second gas
Body discharge tube GDT1, GDT2, high-speed rectifier pipe D3, Transient Suppression Diode TVS and current-limiting resistance R1, each signal pass through respectively
First gas discharge tube GDT1 and Transient Suppression Diode TVS are met isolation input end reference ground GND2 and are discharged by second gas
Pipe GDT2 connects lightning proof ground, and the current-limiting resistance R1 is connected in series in first gas discharge tube GDT1 and Transient Suppression Diode TVS
Between, the high-speed rectifier pipe D3 and first gas discharge tube GDT1 is in star-like connection；The active isolation circuit includes magnetic coupling
Signal transceiver U1, signal transceiver U2, and be connected to monostable between magnetic coupling signal transceiver U1 and signal transceiver U2
State trigger U3；
The power supply circuit includes the transformer T and DC converting circuit that are sequentially connected, and the DC converting circuit includes rectification
Bridge D1, filter capacitor C3 and voltage-stabiliser tube D2, the transformer output end are connected with rectifier bridge D1, the filter capacitor C3 and voltage stabilizing
Pipe D2 is parallel to the output end of rectifier bridge D1；
Two-way communication signals are isolated the high-voltage pulse that lightning protection circuit part fails to eliminate by magnetic coupling signal transceiver U1,
The voltage peak of magnetic coupling signal transceiver U1 outputs is determined by the supply voltage of power supply circuit, and two-way communication signals are changed
It is that, with controlled unidirectional receiving and transmitting signal, unidirectional receiving and transmitting signal is converted to two-way communication signals and carries out by signal transceiver U2 again
Output, is received between two transceivers and is controlled by two monostable flipflop U3 with hair.
2. isolation type bidirectional signal of communication lightning protection device according to claim 1, it is characterised in that：The monostable flipflop
U3 is two, is both connected between magnetic coupling signal transceiver U1 and signal transceiver U2.
3. isolation type bidirectional signal of communication lightning protection device according to claim 1, it is characterised in that：The DC converting circuit
It is two groups, the output end of one of which DC converting circuit is connected with magnetic coupling signal transceiver U1, monostable flipflop U3, wherein
Another group of output end of DC converting circuit is connected with signal transceiver U2.
4. isolation type bidirectional signal of communication lightning protection device according to claim 1, it is characterised in that：The magnetic coupling signal transmitting-receiving
The pins of device U1 the 6th, the 7th pin, and the 12nd pin and the 13rd pin of signal transceiver U2 pass through a resistance
R2 is connected to the two ends of a resistance R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410454198.0A CN104167724B (en) | 2014-09-08 | 2014-09-08 | A kind of isolation type bidirectional signal of communication lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410454198.0A CN104167724B (en) | 2014-09-08 | 2014-09-08 | A kind of isolation type bidirectional signal of communication lightning protection device |
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| Publication Number | Publication Date |
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| CN104167724A CN104167724A (en) | 2014-11-26 |
| CN104167724B true CN104167724B (en) | 2017-06-20 |
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| CN201410454198.0A Active CN104167724B (en) | 2014-09-08 | 2014-09-08 | A kind of isolation type bidirectional signal of communication lightning protection device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932069B (en) * | 2016-05-12 | 2023-04-18 | 上海芯石微电子有限公司 | Low-capacitance low-voltage TVS device with optimized structure and process and manufacturing method thereof |
| CN109390887B (en) * | 2017-08-14 | 2024-02-02 | 深圳康普盾科技股份有限公司 | Combined junction box with lightning protection function |
| CN108169548A (en) * | 2018-01-29 | 2018-06-15 | 西安神电电器有限公司 | A kind of arrester on-Line Monitor Device |
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|---|---|---|---|---|
| GB2302621A (en) * | 1995-06-22 | 1997-01-22 | Mtl Instr Group Plc The | Electrical surge protector for signal lines |
| CN201051719Y (en) * | 2007-06-26 | 2008-04-23 | 福州大学 | Controllable digital high-voltage power supply for current conversion technology |
| CN101976830A (en) * | 2010-11-18 | 2011-02-16 | 南京信息工程大学 | Surge protection device of high-definition network video camera |
| CN202231424U (en) * | 2011-09-29 | 2012-05-23 | 上海臻和防雷电气技术有限责任公司 | Lightning protection device of intelligent electrical system communication lines |
| CN203722226U (en) * | 2014-01-14 | 2014-07-16 | 南京普天鸿雁电器科技有限公司 | Lightning protection device integrating lightning protection, signal transmission and power supply into one body |
| CN104023441A (en) * | 2014-05-30 | 2014-09-03 | 西安文理学院 | Digital control LED street lamp driving power source |
-
2014
- 2014-09-08 CN CN201410454198.0A patent/CN104167724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2302621A (en) * | 1995-06-22 | 1997-01-22 | Mtl Instr Group Plc The | Electrical surge protector for signal lines |
| CN201051719Y (en) * | 2007-06-26 | 2008-04-23 | 福州大学 | Controllable digital high-voltage power supply for current conversion technology |
| CN101976830A (en) * | 2010-11-18 | 2011-02-16 | 南京信息工程大学 | Surge protection device of high-definition network video camera |
| CN202231424U (en) * | 2011-09-29 | 2012-05-23 | 上海臻和防雷电气技术有限责任公司 | Lightning protection device of intelligent electrical system communication lines |
| CN203722226U (en) * | 2014-01-14 | 2014-07-16 | 南京普天鸿雁电器科技有限公司 | Lightning protection device integrating lightning protection, signal transmission and power supply into one body |
| CN104023441A (en) * | 2014-05-30 | 2014-09-03 | 西安文理学院 | Digital control LED street lamp driving power source |
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| CN104167724A (en) | 2014-11-26 |
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