CN201167385Y - Full-path bidirectional optical transmitter-receiver for restraining multilayer lightning protection wall audio-video data - Google Patents
Full-path bidirectional optical transmitter-receiver for restraining multilayer lightning protection wall audio-video data Download PDFInfo
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- CN201167385Y CN201167385Y CNU2008200793713U CN200820079371U CN201167385Y CN 201167385 Y CN201167385 Y CN 201167385Y CN U2008200793713 U CNU2008200793713 U CN U2008200793713U CN 200820079371 U CN200820079371 U CN 200820079371U CN 201167385 Y CN201167385 Y CN 201167385Y
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Abstract
The utility model relates to a full-channel bidirectional inhibition multilayer anti-lightning wall video and audio data optical terminal, which comprises an interface unit and a plurality of interface conversion circuits connected with the interface unit. The optical terminal is characterized in that interface anti-lightning protection circuits corresponding to each interface conversion circuit are respectively arranged on a connection circuit between the interface unit and each interface conversion circuit; each interface anti-lightning protection circuit includes a front protection circuit and a rear protection circuit; and each anti-lightning protection circuit is mainly composed of corresponding semiconductor discharge tube and a gas discharge tube. According to the principle of multistage protection and discharge stage by stage and the characteristics of each interface conversion circuit, the specific structure of each anti-lightning protection circuit is reasonably arranged, thus achieving overall full-channel protection through the bidirectional inhibition of positive and negative overvotlage and overcurrent and the bidirectional inhibition of inside and outside disturbance.
Description
Technical field
The utility model relates to the two-way inhibition multilayer of a kind of full tunnel lightning protection wall video/audio optical transceiver, belongs to electronic technology field.
Background technology
Video optical multiplexer is that the development that is accompanied by supervisory control system begins in Development in China.Early stage simulated light terminal mainly is to adopt the mode of analog fm, amplitude modulation, phase modulation that signals such as the video of base band, audio frequency, data are modulated to transmit on the light, for the growing market demand, the simulated light terminal is because intrinsic easily crosstalking, easily decay, easily wear out, and the restriction of low bandwidth utilance, be difficult to satisfy big capacity, multiple services transmission requirement.Along with the development of mechanics of communication, Digital Optical Terminal has begun to move towards the application of market and industry, and grows up gradually.It is of limited application in early days, the overlay area is little, the point that distributes is few, the laying cable is short, the lightning protection problem is not outstanding, now, it has been widely used in highway, financial sector, military, traffic monitoring and large-scale factories and miness, school, in the supervisory control system of public places such as building, the point of distribution is many, wide, line length, outside run is not waited to kilometers up to a hundred by hundreds of rice, and the regional common existing heavy current installation that distributes, a large amount of monitoring is arranged again, communication, weak current equipments such as sensing, sometimes even be installed on the high hack lever on the wilderness or the mountain ridge, these all are to subject to be struck by lightning or the weak spot of lightning induction, and thunderstruck chance is very many.As everyone knows, thunder and lightning has great destructiveness, and its voltage is up to millions of volts, and immediate current can be up to hundreds thousand of amperes.And determined it in specific voltage, current range, to work based on integrated, highdensity designs of fine electronic equipment height such as the video optical multiplexer of microelectric technique and design feature.When lightning surge exceed equipment bear level the time, just may occur that chip is damaged, phenomenons such as parts are aging in advance, reliability reduction.Therefore, International Electrotechnical Commission (IEC) is called the thunder and lightning disaster " public hazards of information age ".
Because safety defense monitoring system is used middle part sub-headend video optical multiplexer (the transmitting terminal optical transceiver that is used for the outer monitoring camera of junction chamber) and is designed to the outdoor mounted mode, and much the stube cable and the optical cable of optical transceivers are outdoor built on stilts mode or bury the ground mode.So lightning wave has the multiple mode of infection, not only to face the attack of direct lightning strike, also has conduction thunder by multiple cable pipeline, the induction thunder of space radiation coupling is attacked, the invasion and attack of thunder and lightning really are all-pervasive, therefore the video optical multiplexer lightning protection is comprehensive system engineering, and the technical measures of being taked also are many-sided.Any single safeguard procedures, its effect all are limited.
Modern integrated lightning protection mainly adopts the principle of three grades of protection:
(1) most lightning currents directly being introduced the underground foundation earthing device lets out diffusing;
(2) block the overvoltage of introducing along power line or data, holding wire;
(3) overvoltage surge amplitude (overvoltage protection) on the protected equipment of restriction.
This three lines of defence, indispensable, cooperatively interact each Xingqi duty.Usually the major technique measure is following 5 points at present:
(1) interception: most economical, effective method remains lightning rod (lighting proof strip, lightning conduction) method.
(2) shielding: shielding is to prevent one of basic means of any form electromagnetic interference.The purpose of shielding, the one, the electromagnetic energy of a certain intra-zone of restriction is outwards propagated, and the 2nd, prevent or reduce the external electromagnetic emittance to protected spatial transmission.
(3) equipotential connects: all conductors are done good electrical conductivity mutually connect, and be communicated with grounding system.Its effect, the one, for lightning current provides low-impedance continuous passage, make it import the earth rapidly and release.The 2nd, the system each several part of making does not produce the potential difference that is enough to cause damage, thereby reaches the purpose of protection equipment and personal safety.
(4) shunting: the lightning current energy should be met the level principle in the earth is released process.Level is exactly according to the lightning protection district that is divided the thunder and lightning energy cascade to be released.Many, fast as far as possible as far as possible released excess energy into ground before introducing information system.
(5) ground connection: ground connection is one of the most effective means of shunting and release direct lightning strike and thunder and lightning electromagnetic interference energy, also is potential balance bucking-out system basis.Do not have the lightening protection installation of good grounding system or imperfect earth to become and draw the disaster that thunder is entered the room; Lightning arrester ground connection is bad, also provides Lightning Electromagnetic Pulse Electrical and Electronic equipment to be produced the chance of inductive, capacitive couplings interference.
Though multistage protection; the principle of releasing has step by step comparatively comprehensively instructed present lightning Protection Design and engineering construction; but in the video optical multiplexer application; because early stage people are limited to the harm understanding of thunder and lightning; the lightning protection problem does not obtain enough attention; and built on stilts demand of installing in the practical application; and the restriction of installing space; the miniaturization of unilateral pursuit equipment; lightning protection etc. is not included in the infrastructure device; even certain customers have disposed lightning protection component separately, also be difficult to the lightning protection effect that reaches desirable.
At first, lightning protection device and protected equipment are separation equipment, desirable lightning-protected product should be one small-sized, compact and can minimum distance be installed in around the protected equipment.Yet the common volume of existing lightning protection device is bigger; the negative effect that brings thus is; size is big more; its intrinsic internal wiring inductance is just big more; owing to space constraints, volume is bigger simultaneously, also is not easy to be installed near near the protected equipment; therefore need long connecting line is installed, connecting line itself also has inductance.When instantaneous macro-energy surge attacked, the inductance that the lightning protection device lead-in wire produces was not allowed to ignore.Internal inductance and line inductance are big more, and be also just big more to the harmful effect of the limit levels of guard system.If lightning protection device is enough short to the lead-in wire of protected equipment, be the effect that is difficult to play good anti-lightning strike surge.
Secondly, all there is very big difference in different systems in structural arrangements, operating voltage, operating frequency, transmission rate and impedance etc.Therefore, their desired shocking preventing technology schemes are also different.Owing to adopt cascade protection, the residual voltage control and the response time control of each inter-stage also are difficult points for the engineering staff.Sometimes final stage protection damages, and also not action of previous stage protection, or the residual voltage of previous stage is excessive, causes final stage to be damaged, and lightning protection measures at this moment performs practically no function.
The utility model content
For overcoming the above-mentioned defective of prior art, the utility model provides the two-way inhibition multilayer of a kind of full tunnel lightning protection wall video/audio optical transceiver, to realize the whole lightning-proof protection of optical transceiver.
The utility model realizes that the technical scheme of above-mentioned purpose is: the two-way inhibition multilayer of a kind of full tunnel lightning protection wall video/audio optical transceiver; comprise interface unit and the some interface conversion circuits that are connected with described interface unit, it is characterized in that being respectively equipped with on the connection line between described interface unit and each interface conversion circuit interface lightning protection circuit corresponding with each interface conversion circuit.
Described each interface lightning protection circuit includes the front and back stages protective circuit.
Described interface circuit comprises the video interface change-over circuit; the audio interface change-over circuit; data-interface change-over circuit and Ethernet interface change-over circuit; interface lightning protection circuit between described video interface change-over circuit and the interface unit on the connection line is the video interface lightning protection circuit; interface lightning protection circuit between described audio interface change-over circuit and the interface unit on the connection line is the audio interface lightning protection circuit; interface lightning protection circuit between described data-interface change-over circuit and the interface unit on the connection line is the data-interface lightning protection circuit, and the interface lightning protection circuit between described Ethernet interface change-over circuit and the interface unit on the connection line is the Ethernet interface lightning protection circuit.
First class of protection circuit in described audio interface lightning protection circuit and the video interface lightning protection circuit includes a gas discharge tube that is connected across between holding wire and the protection ground; the back of this gas discharge tube also is provided with a gap discharge device that is connected across between holding wire and the protection ground; the second class protection circuit includes two discharge paths that are connected across side by side between two holding wires, and these discharge paths are in series by diode and transition pipe.
Described gap discharge device is made of two rectangle Copper Foils, and the tip of two Copper Foils is relative, and wherein a slice rectangle Copper Foil connects holding wire, and another sheet rectangle Copper Foil with connecting protection.
Before and after comprising, first class of protection circuit in the described data-interface lightning protection circuit is connected across a secondary gas discharge tube and one three utmost point gas discharge tube between two data wires side by side; the middle pin of wherein said three utmost point gas discharge tubes connects protection ground; the second class protection circuit is the Transient Voltage Suppressor spare with three pins that is connected across between two data wires; this Transient Voltage Suppressor spare is made up of the transition pipe, and its 3rd pin connects protection ground.
Described two data wires all are serially connected with resettable fuse between the connecting portion of itself and described three utmost point gas discharge tubes and described Transient Voltage Suppressor spare, described data interface circuit also is provided with independently or is integrated in the optically coupled circuit on the interface circuit chips.
Described Ethernet interface lightning protection circuit is divided into transmission interface lightning protection circuit and receiving interface lightning protection circuit two parts; first class of protection circuit in described transmission interface lightning protection circuit and the described receiving port lightning protection circuit is made of Transient Voltage Suppressor spare; this Transient Voltage Suppressor spare is made up of the transition pipe; the pin at its two ends connects two holding wires by two reverse diodes arranged side by side respectively; middle pin connects protection ground; the second class protection circuit comprises two discharge paths that are connected across side by side between two holding wires, and these discharge paths are in series by diode and transition pipe.
The power circuit front of this optical transceiver is provided with the power interface lightning protection circuit; described power interface lightning protection circuit comprises classification front and back stages protective circuit; first class of protection circuit wherein comprises an overcurrent fuse and piezo-resistance of mutual series connection; wherein said overcurrent fuse connects power line; described piezo-resistance connects power supply ground; the second class protection circuit comprises overcurrent fuse; piezo-resistance and semiconductor arresting element; wherein said overcurrent fuse one end connects power line; the other end links to each other with described semiconductor arresting element one end with described piezo-resistance, and the other end of described piezo-resistance and described semiconductor arresting element is connected power supply ground.
The first class of protection circuit of described power interface lightning protection circuit also comprises the gas discharge tube of a cross-over connection between power supply ground and protection ground; the connecting portion on this gas discharge tube and power supply ground is the piezo-resistance on this first class of protection circuit and the connecting portion on this power supply ground; the second class protection circuit also comprises the gas discharge tube of a cross-over connection between power supply ground and protection ground; the connecting portion on this gas discharge tube and power supply ground is the piezo-resistance on this second class protection circuit and the connecting portion on this power supply ground, described power line on itself and this first class of protection circuit the overcurrent fuse tie point and and this second class protection circuit on filtration fuse tie point between be serially connected with inductance element.
The beneficial effects of the utility model are: according to the characteristics of multistage protection, the principle of releasing step by step and each interface conversion circuit; reasonably be provided with the concrete structure of each interface lightning protection circuit; two-way inhibition and the internally two-way inhibition of external disturbance disturbance by aligning the negative overpressure overcurrent have realized the general protection of full tunnel.
Description of drawings
Fig. 1 is a general structure schematic block diagram of the present utility model;
Fig. 2 is the schematic diagram of the utility model power interface lightning protection circuit;
Fig. 3 is the schematic diagram of the utility model data-interface lightning protection circuit;
Fig. 4 is the schematic diagram of the utility model video interface lightning protection circuit and audio interface lightning protection circuit;
Fig. 5 is the schematic diagram of utility model Ethernet interface lightning protection circuit.
Embodiment
Referring to Fig. 1-5, video optical multiplexer is divided from functional module, mainly comprises interface unit; the protective circuit of each interface, interface conversion circuit, multiplex/demultiplex unit; high speed serialization/separate string location, UFIU UMSC Fiber Interface Unit, and power unit and this few component parts of clock unit.This patent emphasis is in the protection part of power supply and each communication interface.
Realize comprehensive protection, must carry out the full tunnel lightning protection on the one hand.The business interface of video optical multiplexer is very abundant, comprises video, audio frequency, data, ether etc., and the signal source path increases, and system also invades with regard to the easier lightning wave that suffers.The surge voltage electric current not only can also can be scurried into optical transceiver inside from various signal cables from power line, and the operate as normal of interfere with communications equipment is when serious even can damage equipment.On the one hand because optical transceiver equipment inner structure Highgrade integration (VLSI chip); equipment is withstand voltage, the level of anti-overcurrent descends thereby cause; ability to bear to thunder and lightning (comprise induction thunder and switching overvoltage surge) descends, and pays close attention to widely and payes attention to so the lightning protection of interface must cause.Except stoping along the lightning surge of the pipeline cable access arrangement of various interface, according to the application circumstances of optical transceiver, the video front-end equipment and the communications cable are erected at the open air greatly, also will prevent the harm of direct lightning strike.
Realize comprehensive protection, also will carry out two-way inhibition on the other hand.The two-way inhibition here has the implication of two aspects, and the one, two-way positive overvoltage pulse interference and the negative overpressure impulse disturbances of having comprised; Two-way on the other hand external disturbance and the internal disturbance of having comprised.
Realize comprehensive protection, also have an important guideline: multistage protection, release step by step.
The power interface lightning protection circuit mainly can be referring to Fig. 2.Optical transceiver power supply is by the power line network input, and electrical network stretches a thousand li, no matter be thunderbolt or the line surge odds is all very high.Direct lightning strike hits high-voltage electric power circuit, makes voltage through transformer coupled to 220 couchers, at last through supplied by AC/DC electricity modular converter invasion optical transceiver power interface; Low-voltage circuit also may be hit or lightning induced voltage by direct lightning strike in addition.The lightning overvoltage that occurs on 220 volts of power lines on average can reach 10000 volts, and the overvoltage of this transient state is enough to optical transceiver is caused destructive threat.Adopt the lightning protection scheme, can not only protect equipment, reduce the probability that is struck by lightning and damages, can also power conditioner, filtering burr spike disturbs, and improves system reliability, and can prolong service life of equipment.
Protection to power port; the utility model has adopted the two-stage protection scheme; the first order adopts the combination of overcurrent fuse and piezo-resistance: piezo-resistance is a kind of votage limit type protection device, is connected in parallel in the supply line, in the circuit design; the pressure sensitive voltage of piezo-resistance should be considered carefully; because in this circuit, power supply is for the input of 12V direct current, in order to guarantee that piezo-resistance is in circuit application; enough margins of safety are arranged, and the choosing value of pressure sensitive voltage is decided to be 20V.Utilize the nonlinear characteristic of piezo-resistance, when overvoltage appears at two interpolars of piezo-resistance, piezo-resistance can be with in the voltage range about voltage clamp to a relatively-stationary 20V, thereby realizes the protection to late-class circuit.The advantage of piezo-resistance is that discharge capacity is big; be swift in response; but the clamper precision is not high; when instantaneous surge attacks; significantly lifting of big pressure between power line and the ground wire; piezo-resistance acts on rapidly; release most of surge energy to power ground; ceramic gas discharge tube of cross-over connection between power supply ground and protection ground; as the path that energy is released, the failure mode of piezo-resistance mainly is short circuit, and stronger transient overvoltage melts resistive element perforation or the aging weak spot resistive element material that makes; cause short circuit, thereby it is on fire to form high heat.Certainly also can occur when the overcurrent of passing through is too big, causing valve block by the situation that bursts and open a way.When failure mode is open circuit, consequence is that equipment can not be worked, when but failure mode is short circuit, except equipment can't operate as normal, also can bring the hidden danger of fire, consequence is very serious, for fear of this situation, and the resettable fuse of connecting with piezo-resistance in this circuit, fuse belongs to the thermosensitive type device, reaction speed is slower, generally at Millisecond, so in the thunderbolt transient state, it is inoperative, application aims mainly is to prevent that short circuit or long-term overcurrent condition from appearring in device interior, and in time the short circuit load on the open-circuit line or cross current load prevents the security feature of the electrical fire and the equipment of assurance.The type selecting of fuse will be considered the actual loading situation of circuit, and during full load, the optical transceiver operating current is about 1A, and selecting fuse to get rated current is 2.5A, and electric current and voltage fluctuation instantaneous when switching for load leaves enough allowances, guarantees the equipment operate as normal.
The partial protection and the first order have similarity; purpose is to weaken residual voltage with the mode that classification is released; difference; be that this one-level has increased a semiconductor discharge tube SMBJ15A, the advantage of semiconductor discharge tube is a clamper precision height, but discharge capacity is little; connect together with piezo-resistance; just in time form complementation, can guarantee that the voltage of end is accurately controlled, can provide bigger discharge capacity again.
Inductance element of serial connection between the protection of the two poles of the earth; both played the effect of isolation; can guarantee again to allow the first order play the effect of thick protection; when surge arrives; the first order is effect earlier, and the most energy of releasing is after residual voltage further weakens through inductance; just arrive the second level and do meticulous protection, with voltage clamp in normal operating voltage range.
The data-interface lightning protection circuit mainly can be referring to Fig. 3.The cradle head control data generally link to each other with rig camera; be exposed to outdoor more; interface type mostly is the RS485 pattern; the common mode operating voltage range of RS485 is-7V is between+the 12V; to the common mode disturbances sensitivity; if there is not excellent protection, light then influence the stability of devices communicating, heavy then defective communication interface.So the port protection of cradle head control data also is very important.
First order protection is at first considered its withstand voltage flow-resistant capacity for thick protection.Here select the gas discharge tube of switching mode for use, select ceramic gas discharge tube 2RM250M-5 to carry out the differential mode protection in this programme, select for use 3RM250L-6 to carry out the common mode protection.The main feature of gas discharge tube is that leakage current is little, and discharge capacity is big, and device interelectrode capacitance amount is little, usually less than 2pF, thus very little to line influence, not only help releasing rapidly of surge voltage, and device power consumption is reduced greatly.But shortcoming is that the residual voltage after the device breakdown is higher, and 2-4KV is arranged approximately
-, and the reaction time is slower, is the microsecond level, and the operation voltage precision is not high, so be used in the first order of communication equipment lightning protection usually, bears bigger surge current.
The combining and configuring of resettable fuse and Transient Voltage Suppressor (TVS) is selected in second level protection.TVS is the votage limit type element, and its operation principle is after surge voltage reaches puncture voltage, and the current return circuit that provides a low-resistance for surge voltage no longer rises on the puncture voltage and keep its both end voltage to maintain to ground, provides protection in the mode of clamper.The advantage of TVS is that residual voltage is low, the operation precision height, and the reaction time is fast, and less than 1 nanosecond, and it is the solid original paper, and electric parameter is relatively more consistent when using for a long time.But it is poor that shortcoming is a flow-resistant capacity, and discharge capacity is little, generally has only the hundreds of ampere.So be generally used for the secondary protection of communication equipment, meticulous protection be provided.And resettable fuse is the current-limiting type original paper, is a kind of semistor, and when the electric current that flows through it during less than its holding current (temperature is lower), its resistance is very little; When the electric current that flows through it surpasses its trigger current (temperature rising), its resistance sharply increases, thus the continuation intrusion of blocking-up lightning current or the afterflow of circuit, and temperature can be recovered after reducing voluntarily.But because thermal inertia, its reaction speed is very slow, is generally a second level (electric current that flows through is big more or temperature is high more, reacts fast more).
When surges such as thunder and lightning arrived, the fast TVS of response speed at first moved, and can accurately be controlled at certain level to transient overvoltage; If surge current increases, then resettable fuse action, the voltage lifting at two ends reduces the surge voltage that leaks into the rear end; Surge continue to increase, until the discharge that promotes the prime gas discharge tube, the ground of directly releasing of electric current greatly.
It is that protective capability is limited that the mode of this bypass protection has a shortcoming; though transient state suppressing element (as TVS, MOV, gas discharge tube etc.) can switch to the transient energy of harmfulness the earth; but it can only protect certain energy with interior glitch; duration can not be very long, and need the passage of a good connection the earth.This has certain degree of difficulty in reality realizes.
Adopted bypass and isolated the mode that combines in order better to realize protection, the utility model.The mode of isolating can be born the long-term glitch of high voltage, owing to the high insulation resistance of separator, can not produce the surge current of infringement property, plays the effect of protection interface.Usually use photoelectrical coupler or high speed transformer to realize isolating interface.The advantage of this mode is that data wire is not had extra load, but because optocoupler or transformer are insensitive to the transition that continues, so the data rate on the protective wire is had certain restriction.Realize that insulation blocking has dual mode usually: the one, use independently optocoupler; Two are to use the secondary integrated chip of integrated optocoupler in the sheet such as MAX1480 etc.The secondary integrated chip MAX1480 that this programme is just selected for use, the advantage of this scheme is to implement also than being easier to the integrated level height.
The interface lightning protection circuit structure of Voice ﹠ Video is identical, mainly can be referring to Fig. 4.It is the same with other communication port to look the total principle of audio port lightning protection, but will consider the otherness of port, and parts selection and implementation are understood some difference.
At first looking the audio port transmission signals is high-frequency signal, and this just requires the electric capacity of lightning protection component enough little, and is enough little to the influence of circuit, so the mode that coupling is isolated is in the improper protection that is used in video signal port.In addition, composite video signal is 1 volt a peak-peak voltage, and audio signal is 1V or 2V peak-peak voltage, and this just requires terminal protection to select for use puncture voltage little, the TVS device that control precision is high.But the capacitance of TVS device is bigger usually, can reach 100nF, in order to solve this contradiction, with TVS device and diode polyphone, the interelectrode capacitance of diode is minimum, total appearance value can be controlled at behind the polyphone in the very little scope (5nF), so both satisfy the minimum that influences, can realize accurate clamper again voltage to signal.
And first order protection is selected is the glass gas-discharge pipe, and it is less that the glass gas-discharge pipe not only encapsulates, and is convenient to integratedly, and inter-stage electric capacity minimum (less than 0.8pF) is suitable for the protection of high-frequency signal port very much.Increased the device of a discharging gap in the rear end of glass discharge vessel, during the last realization of PCB, the Copper Foil of placing two rectangles exactly is in the input signal port, Copper Foil relatively most advanced and sophisticated, and distance is very near, and a slice Copper Foil connects protection ground, and a slice Copper Foil connects holding wire.Its operation principle is: during operate as normal, the insulation of Copper Foil two ends, do not influence line traffic, but when surge is come, the potential difference lifting of two Copper Foils, a large amount of electric charges accumulate in two relative tips of Copper Foil respectively, current potential continues lifting, and when acquiring a certain degree, the gap is breakdown, produce most advanced and sophisticated arc discharge, thus overcurrent is released into ground.The advantage of this mode is that discharge capability is strong, and can tolerate the higher surge of long period, and realizes simply, but shortcoming is that the reaction time is slow, replenishes so be used as the useful of first order protection at this.
The Ethernet interface lightning protection circuit mainly can be participated in Fig. 5.The ethernet port signal has two characteristics: the one, and the speed height, voltage magnitude is little; The 2nd, adopted the balance transmission mode.In conjunction with it self these two characteristics, the lightning protection scheme of Ethernet must guarantee enough little appearance value, so just can reduce the influence to high-speed data transmission, and should carry out the common mode protection, is also noted that the influence of differential mode interference.Therefore the lightning protection scheme of Ethernet is as shown above: semiconductor discharge tube is all adopted in differential mode and common mode protection, clamper precision height, and differential mode and common mode protection simultaneously all is connected in series diode, to realize minimum capacitance.
Claims (10)
1. the two-way inhibition multilayer of full tunnel lightning protection wall video/audio optical transceiver; comprise interface unit and the some interface conversion circuits that are connected with described interface unit, it is characterized in that being respectively equipped with on the connection line between described interface unit and each interface conversion circuit interface lightning protection circuit corresponding with each interface conversion circuit.
2. the two-way inhibition multilayer of full tunnel as claimed in claim 1 lightning protection wall video/audio optical transceiver is characterized in that described each interface lightning protection circuit includes the front and back stages protective circuit.
3. the two-way inhibition multilayer of full tunnel as claimed in claim 2 lightning protection wall video/audio optical transceiver; it is characterized in that described interface circuit comprises the video interface change-over circuit; the audio interface change-over circuit; data-interface change-over circuit and Ethernet interface change-over circuit; interface lightning protection circuit between described video interface change-over circuit and the interface unit on the connection line is the video interface lightning protection circuit; interface lightning protection circuit between described audio interface change-over circuit and the interface unit on the connection line is the audio interface lightning protection circuit; interface lightning protection circuit between described data-interface change-over circuit and the interface unit on the connection line is the data-interface lightning protection circuit, and the interface lightning protection circuit between described Ethernet interface change-over circuit and the interface unit on the connection line is the Ethernet interface lightning protection circuit.
4. the two-way inhibition multilayer of full tunnel as claimed in claim 3 lightning protection wall video/audio optical transceiver; it is characterized in that the first class of protection circuit in described audio interface lightning protection circuit and the video interface lightning protection circuit includes a gas discharge tube that is connected across between holding wire and the protection ground; the back of this gas discharge tube also is provided with a gap discharge device that is connected across between holding wire and the protection ground; the second class protection circuit includes two discharge paths that are connected across side by side between two holding wires, and these discharge paths are in series by diode and transition pipe.
5. the two-way inhibition multilayer of full tunnel as claimed in claim 4 lightning protection wall video/audio optical transceiver; it is characterized in that described gap discharge device is made of two rectangle Copper Foils; the tip of two Copper Foils is relative, and wherein a slice rectangle Copper Foil connects holding wire, and another sheet rectangle Copper Foil with connecting protection.
6. the two-way inhibition multilayer of full tunnel as claimed in claim 3 lightning protection wall video/audio optical transceiver; it is characterized in that the first class of protection circuit in the described data-interface lightning protection circuit comprises that front and back are connected across a secondary gas discharge tube and one three utmost point gas discharge tube between two data wires side by side; the middle pin of wherein said three utmost point gas discharge tubes connects protection ground; the second class protection circuit is the Transient Voltage Suppressor spare with three pins that is connected across between two data wires; this Transient Voltage Suppressor spare is made up of the transition pipe, and its 3rd pin connects protection ground.
7. the two-way inhibition multilayer of full tunnel as claimed in claim 6 lightning protection wall video/audio optical transceiver, it is characterized in that described two data wires all are serially connected with resettable fuse between the connecting portion of itself and described three utmost point gas discharge tubes and described Transient Voltage Suppressor spare, described data interface circuit also is provided with independently or is integrated in the optically coupled circuit on the interface circuit chips.
8. the two-way inhibition multilayer of full tunnel as claimed in claim 3 lightning protection wall video/audio optical transceiver; it is characterized in that described Ethernet interface lightning protection circuit is divided into transmission interface lightning protection circuit and receiving interface lightning protection circuit two parts; first class of protection circuit in described transmission interface lightning protection circuit and the described receiving port lightning protection circuit is made of Transient Voltage Suppressor spare; this Transient Voltage Suppressor spare is made up of the transition pipe; the pin at its two ends connects two holding wires by two reverse diodes arranged side by side respectively; middle pin connects protection ground; the second class protection circuit comprises two discharge paths that are connected across side by side between two holding wires, and these discharge paths are in series by diode and transition pipe.
9. as claim 1; 2; 3; 4; 5; 6; the two-way inhibition multilayer of 7 or 8 described full tunnels lightning protection wall video/audio optical transceiver; the power circuit front that it is characterized in that this optical transceiver is provided with the power interface lightning protection circuit; described power interface lightning protection circuit comprises classification front and back stages protective circuit; first class of protection circuit wherein comprises an overcurrent fuse and piezo-resistance of mutual series connection; wherein said overcurrent fuse connects power line; described piezo-resistance connects power supply ground; the second class protection circuit comprises overcurrent fuse; piezo-resistance and semiconductor arresting element; wherein said overcurrent fuse one end connects power line; the other end links to each other with described semiconductor arresting element one end with described piezo-resistance, and the other end of described piezo-resistance and described semiconductor arresting element is connected power supply ground.
10. the two-way inhibition multilayer of full tunnel as claimed in claim 9 lightning protection wall video/audio optical transceiver; the first class of protection circuit that it is characterized in that described power interface lightning protection circuit also comprises the gas discharge tube of a cross-over connection between power supply ground and protection ground; the connecting portion on this gas discharge tube and power supply ground is the piezo-resistance on this first class of protection circuit and the connecting portion on this power supply ground; the second class protection circuit also comprises the gas discharge tube of a cross-over connection between power supply ground and protection ground; the connecting portion on this gas discharge tube and power supply ground is the piezo-resistance on this second class protection circuit and the connecting portion on this power supply ground, described power line on itself and this first class of protection circuit the overcurrent fuse tie point and and this second class protection circuit on filtration fuse tie point between be serially connected with inductance element.
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| CNU2008200793713U CN201167385Y (en) | 2008-03-13 | 2008-03-13 | Full-path bidirectional optical transmitter-receiver for restraining multilayer lightning protection wall audio-video data |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102595772A (en) * | 2012-01-19 | 2012-07-18 | 福建星网视易信息系统有限公司 | Method for preventing interface burning-out of equipment with external equipment interface |
| CN102843196A (en) * | 2012-08-27 | 2012-12-26 | 四川雅安电力（集团）股份有限公司 | Optical fiber receiving and transmitting device based on wavelength division multiplexing (WDM) |
| CN102884696A (en) * | 2010-05-04 | 2013-01-16 | 瑞典爱立信有限公司 | Improved surge protection |
| CN103036225A (en) * | 2011-09-29 | 2013-04-10 | 河南安宏信息科技有限公司 | Lightning protection technology |
| CN103141002A (en) * | 2010-07-30 | 2013-06-05 | 霍廷格·鲍德温测量技术有限责任公司 | Protective circuit |
| CN103226967A (en) * | 2013-04-27 | 2013-07-31 | 成都市宏山科技有限公司 | DVD player with lightning protection function |
| CN103618286A (en) * | 2013-11-14 | 2014-03-05 | 大唐移动通信设备有限公司 | Transient over-voltage protection circuit |
| CN103795045A (en) * | 2012-10-31 | 2014-05-14 | 华为技术有限公司 | Protective device |
| CN105552870A (en) * | 2014-10-27 | 2016-05-04 | 菲尼克斯电气公司 | active protection circuit for data transmission of a wired data transmission system |
| CN106982037A (en) * | 2017-03-28 | 2017-07-25 | 林卉 | A kind of VR systems for docking audio ＆ video equipment |
| CN107592591A (en) * | 2017-07-21 | 2018-01-16 | 深圳天珑无线科技有限公司 | Filter circuit and its application process, the device and electronic installation with store function |
| CN109309819A (en) * | 2018-05-25 | 2019-02-05 | 郑州天点科技有限公司 | A kind of open air Digital Optical Terminal |
| CN109473958A (en) * | 2017-09-08 | 2019-03-15 | 深圳创维数字技术有限公司 | A kind of lightning protection circuit and electrical equipment |
| CN110120975A (en) * | 2019-05-06 | 2019-08-13 | 南京瑞贻电子科技有限公司 | A kind of cloud platform connectivity port control device and control method |
| CN116409184A (en) * | 2023-06-12 | 2023-07-11 | 深圳市斯帕克电气有限公司 | New energy automobile safety charging system based on protection terminal circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102884696A (en) * | 2010-05-04 | 2013-01-16 | 瑞典爱立信有限公司 | Improved surge protection |
| CN103141002A (en) * | 2010-07-30 | 2013-06-05 | 霍廷格·鲍德温测量技术有限责任公司 | Protective circuit |
| CN103141002B (en) * | 2010-07-30 | 2016-01-20 | 霍廷格·鲍德温测量技术有限责任公司 | Protective circuit |
| CN103036225A (en) * | 2011-09-29 | 2013-04-10 | 河南安宏信息科技有限公司 | Lightning protection technology |
| CN102595772B (en) * | 2012-01-19 | 2014-07-02 | 福建星网视易信息系统有限公司 | Method for preventing interface burning-out of equipment with external equipment interface |
| CN102595772A (en) * | 2012-01-19 | 2012-07-18 | 福建星网视易信息系统有限公司 | Method for preventing interface burning-out of equipment with external equipment interface |
| CN102843196A (en) * | 2012-08-27 | 2012-12-26 | 四川雅安电力（集团）股份有限公司 | Optical fiber receiving and transmitting device based on wavelength division multiplexing (WDM) |
| CN103795045B (en) * | 2012-10-31 | 2017-08-18 | 华为技术有限公司 | Protection device |
| CN103795045A (en) * | 2012-10-31 | 2014-05-14 | 华为技术有限公司 | Protective device |
| CN103226967A (en) * | 2013-04-27 | 2013-07-31 | 成都市宏山科技有限公司 | DVD player with lightning protection function |
| CN103618286A (en) * | 2013-11-14 | 2014-03-05 | 大唐移动通信设备有限公司 | Transient over-voltage protection circuit |
| CN103618286B (en) * | 2013-11-14 | 2017-02-22 | 大唐移动通信设备有限公司 | Transient over-voltage protection circuit |
| CN105552870A (en) * | 2014-10-27 | 2016-05-04 | 菲尼克斯电气公司 | active protection circuit for data transmission of a wired data transmission system |
| CN105552870B (en) * | 2014-10-27 | 2018-04-13 | 菲尼克斯电气公司 | A kind of active protective circuit for the transmission of wired data transfer system data |
| CN106982037A (en) * | 2017-03-28 | 2017-07-25 | 林卉 | A kind of VR systems for docking audio ＆ video equipment |
| CN107592591A (en) * | 2017-07-21 | 2018-01-16 | 深圳天珑无线科技有限公司 | Filter circuit and its application process, the device and electronic installation with store function |
| CN109473958A (en) * | 2017-09-08 | 2019-03-15 | 深圳创维数字技术有限公司 | A kind of lightning protection circuit and electrical equipment |
| CN109473958B (en) * | 2017-09-08 | 2023-11-21 | 深圳创维数字技术有限公司 | Lightning protection circuit and electrical equipment |
| CN109309819A (en) * | 2018-05-25 | 2019-02-05 | 郑州天点科技有限公司 | A kind of open air Digital Optical Terminal |
| CN110120975A (en) * | 2019-05-06 | 2019-08-13 | 南京瑞贻电子科技有限公司 | A kind of cloud platform connectivity port control device and control method |
| CN116409184A (en) * | 2023-06-12 | 2023-07-11 | 深圳市斯帕克电气有限公司 | New energy automobile safety charging system based on protection terminal circuit |
| CN116409184B (en) * | 2023-06-12 | 2023-08-22 | 深圳市斯帕克电气有限公司 | New energy automobile safety charging system based on protection terminal circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20150313 |
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| EXPY | Termination of patent right or utility model |