CN208256090U - A kind of siganl thunder-proof device - Google Patents
A kind of siganl thunder-proof device Download PDFInfo
- Publication number
- CN208256090U CN208256090U CN201820731285.XU CN201820731285U CN208256090U CN 208256090 U CN208256090 U CN 208256090U CN 201820731285 U CN201820731285 U CN 201820731285U CN 208256090 U CN208256090 U CN 208256090U
- Authority
- CN
- China
- Prior art keywords
- signal
- conversion circuit
- circuit
- optical
- connect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The utility model embodiment is related to anti-thunder technical field, disclose a kind of siganl thunder-proof device, comprising: cavity and the circuit board for being built in the cavity, the circuit board include: the first signal conversion circuit, for inputting the first signal, and first signal is converted into second signal and is exported；First electro-optical conversion circuit is connect with first signal conversion circuit, for inputting the second signal, and the second signal is converted to the first optical signal and is exported；First optical fiber is connect with first electro-optical conversion circuit, is used for transmission first optical signal；First photoelectric conversion circuit is connect with first optical fiber, for inputting first optical signal, and first optical signal is converted to the second signal and is exported；Second signal conversion circuit is connect with first photoelectric conversion circuit, for inputting the second signal, and the second signal is converted to first signal and is exported.In the above manner, the present embodiment can be at low cost, route is simple while meeting lightning protection requirement.
Description
Technical field
The utility model relates to anti-thunder technical field more particularly to a kind of siganl thunder-proof devices.
Background technique
With the quickening of social informatization process and industrial automation process, each neck of the microelectronic product in society
Domain is widely used.Electronic equipment in thunderstorm weather is subject to lightning stroke outdoors for many settings.If all routes are altogether
With laying (such as twisted pair, RS485 dedicated signal lines, cable, coaxial cable), when thunder and lightning occurs, in all signal lines
In, the energy discharged when can generate induction polarity and the identical induced voltage of amplitude, and be struck by lightning is huge, can be in lightning stroke environs
Biggish induced voltage is generated in interior route, and then transient breakdown is connected to the electronics or electric elements at circuit both ends, causes
Biggish loss.The ground potential of thunderbolt point can increase, and the ground potential for being mounted on the equipment near thunderbolt point can increase that (ground potential is anti-
Hit), this current potential is transmitted along signal wire, can be damaged the electronics or electric elements of signal wire distal end, be caused biggish loss.And
And when charging cumulus close to ground, due to the unipolarity of single thundercloud electrification, it can induce in nigh equipment a large amount of
Reversed polarity bound charge, and equipment can accordingly generate the charge with thunder and lightning peer property far from electrification cumulus end, thus equipment with
Between thundercloud and equipment itself produces very high electrostatic potential (induced voltage), and voltage magnitude can reach tens of thousands of to several
100000 volts, so that equipment be caused to discharge and cause electric spark.
The inventor that the utility model is created has found that thunder and lightning destroys in order to prevent during studying the prior art, adopts
Signal line lightning protection is carried out to equipment with photoelectric isolation technology.There are two types of common modes: first, whole process is passed using optical fiber
Defeated signal, but optical fiber lays difficulty at the scene, it is at high cost；Second, signal isolation, but its isolation electricity are carried out using photoisolator
Press it is lower, to meet isolation voltage requirement must using multiple photoisolators combine, at high cost, complex circuit.
Utility model content
The utility model is meeting lightning protection requirement mainly solving the technical problems that provide a kind of siganl thunder-proof device
Meanwhile it is at low cost, route is simple.
In order to solve the above technical problems, the technical solution that the utility model uses is: a kind of siganl thunder-proof device is provided,
It include: cavity and the circuit board for being built in the cavity, the circuit board includes: the first signal conversion circuit, for inputting
First signal, and first signal is converted into second signal and is exported；First electro-optical conversion circuit, with first signal
Conversion circuit connection, for inputting the second signal, and is converted to the first optical signal for the second signal and exports；First
Optical fiber is connect with first electro-optical conversion circuit, is used for transmission first optical signal；First photoelectric conversion circuit, with institute
The connection of the first optical fiber is stated, is converted to the second signal simultaneously for inputting first optical signal, and by first optical signal
Output；Second signal conversion circuit is connect with first photoelectric conversion circuit, for inputting the second signal, and by institute
Second signal is stated to be converted to first signal and export.
Optionally, the circuit board further include: the first micro-processor interface circuit, respectively with first signal conversion circuit, institute
State the connection of the first electro-optical conversion circuit；Second micro-processor interface circuit, respectively with the second signal conversion circuit, first photoelectricity
Conversion circuit connection.
Optionally, the circuit board further include: the first power supply, respectively with first signal conversion circuit, described first
Electro-optical conversion circuit, first micro-processor interface circuit connection；Second source, respectively with the second signal conversion circuit, described
First photoelectric conversion module, second micro-processor interface circuit connection.
Optionally, the circuit board further include: main power source and at least two isolating transformers, the main power source and two institutes
State the primary coil connection of isolating transformer, first power supply and the second source respectively with two isolating transformers
Secondary coil connection.
Optionally, first signal is analog signal, and the second signal is digital signal；The first signal conversion
Circuit is analog to digital conversion circuit, and the second signal conversion circuit is D/A converting circuit.
Optionally, first signal is RS485 signal, and the second signal is TTL signal；The first signal conversion
Circuit is RS485 signal transmitting and receiving/coding circuit, and the second signal conversion circuit is RS485 signal transmitting and receiving/decoding circuit.
Optionally, first signal is ethernet signal, and the second signal is TTL signal；First signal turns
Changing circuit is ethernet signal transmitting-receiving/coding circuit, and the second signal conversion circuit is ethernet signal transmitting-receiving/decoding electricity
Road.
Optionally, the circuit board further include: third signal conversion circuit, for inputting third signal, and by described
Three signals are converted to fourth signal and export；Second electro-optical conversion circuit is connect with the third signal conversion circuit, for defeated
Enter the fourth signal, and the fourth signal is converted into the second optical signal and is exported；Second optical fiber, with second electric light
Conversion circuit connection, is used for transmission second optical signal；Second photoelectric conversion circuit connect with second optical fiber, is used for
Second optical signal is inputted, and second optical signal is converted into the fourth signal and is exported；Fourth signal conversion electricity
Road is connect with second photoelectric conversion circuit, for inputting the fourth signal, and the fourth signal is converted to described
Third signal simultaneously exports；First micro-processor interface circuit respectively with the fourth signal conversion circuit, second photoelectric conversion
Circuit connection, second micro-processor interface circuit connect with the third signal conversion circuit, second electro-optical conversion circuit respectively
It connects；First power supply is connect with the fourth signal conversion circuit, second photoelectric conversion circuit respectively, second electricity
Source is connect with the third signal conversion circuit, second electro-optical conversion circuit respectively.
Optionally, the isolation voltage rank adaptation of the length of first optical fiber and the siganl thunder-proof device, the isolation
Voltage class is higher, and the length of first optical fiber is longer.
Optionally, first optical fiber is metal-free optical fiber.
Optionally, first optical fiber is metal-free optical fiber, which is 12mm-20mm.
The beneficial effects of the utility model are: the siganl thunder-proof device of the utility model embodiment by being arranged on circuit boards
First optical fiber makes electric signal be converted to optical signal and carries out of short duration paths in the first optical fiber, so that cutting is by thunder and lightning electromagnetism
The route for the high pressure conduction that pulse generates, the high_voltage isolation that thunder and lightning is generated prevent it to electricity in the side of isolation lightning-protection module
Son or electrical components damage, and the various interference signals of signal source end and the interference letter of power supply conduction can be effectively prevented
Number, prevent interference of the signal system to power grid, and increase the load capacity of signal source, lightning protection requirement can met
Meanwhile it is at low cost, route is simple.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of structural schematic diagram of the utility model siganl thunder-proof device that wherein an embodiment provides；
Fig. 2 a is that the siganl thunder-proof device of Fig. 1 inputs the structural schematic diagram of analog signal；
Fig. 2 b is that the siganl thunder-proof device of Fig. 1 inputs the structural schematic diagram of RS485 signal；
Fig. 2 c is that the siganl thunder-proof device of Fig. 1 inputs the structural schematic diagram of ethernet signal；
Fig. 3 is a kind of structural schematic diagram for siganl thunder-proof device that another embodiment of the utility model provides；
Fig. 4 is a kind of flow diagram for signal lighting protection method that another embodiment of the utility model provides.
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.This specification is used
Term "vertical", "horizontal", "left" and "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.Term used in this specification
"and/or" includes any and all combinations of one or more related listed items.
In traditional SPD lightning protection, when being struck by lightning, the leakage current of the ground line of surge protector is around
The induced potential generated in conductor circuit can damage electronic equipment, carry out thunder using photoelectric isolation technology in the prior art
Electricity protection.Wherein, had using the usual way that photoelectric isolation technology carries out lightning protection: the first is passed at a distance using optical fiber
Defeated signal, but optical fiber lays difficulty at the scene, and in order to protect optical fiber, often using the light for having metallic jacket and steel core
Fibre, and metallic jacket and steel core needs take measures to carry out lightning protection, and in industrial automation system, the signal of transmission
Generally analog signal realizes that the optical fiber transmission cost of analog signal is very high；Second is to carry out signal using photoisolator
Isolation, but its isolation voltage is generally 2500V hereinafter, not being able to satisfy the requirement of lightning protection.
Based on this, the utility model embodiment provides a kind of siganl thunder-proof device, carries out as a functional module is integrated into
It uses, can be at low cost, using simple and compact-sized while meeting lightning protection requirement, avoid fibre optic installations
Difficulty.
Specifically, with reference to the accompanying drawing, the utility model embodiment is further elaborated.
Fig. 1 is a kind of structural schematic diagram of the utility model siganl thunder-proof device that wherein an embodiment provides.Such as Fig. 1 institute
Show, which includes circuit board 10 and cavity 20, and circuit board 10 is built in cavity 20.
Circuit board 10 includes: the first signal conversion circuit 111, second signal conversion circuit 112, the first electro-optical conversion circuit
121, the first photoelectric conversion circuit 122 and the first optical fiber 123.Wherein, the first signal conversion circuit 111 and the first electro-optic conversion electricity
Road 121 connects, and the first electro-optical conversion circuit 121 is connect with the first optical fiber 123, the first optical fiber 123 and the first photoelectric conversion circuit
122 connections, the first photoelectric conversion circuit 122 are connect with second signal conversion circuit 112.
Specifically, the first signal conversion circuit 111 is for inputting the first signal, and the first signal is converted to second signal
And it exports.First electro-optical conversion circuit 121 is used to input the second signal that the first signal conversion circuit 111 exports, and by this
Binary signal is converted to the first optical signal and exports.First optical fiber 123 is used for transmission the first optical signal.First photoelectric conversion circuit
122 for inputting the first optical signal of the first optical fiber 123 transmission, and first optical signal is converted to second signal and is exported.
Second signal conversion circuit 112 is used to input the second signal of the first photoelectric conversion circuit 122 output, and the second signal is turned
It is changed to the first signal and exports.
Wherein, the first signal conversion circuit 111 can for analog to digital conversion circuit, RS485 signal transmitting and receiving/coding circuit or with
Too net signal transmitting and receiving/coding circuit etc. can be selected according to the actual conditions of input signal.Second signal conversion circuit
112 can be D/A converting circuit, RS485 signal transmitting and receiving/decoding circuit or ethernet signal transmitting-receiving/decoding circuit, Ke Yigen
It is selected according to the actual conditions of input signal.
Wherein, the first electro-optical conversion circuit 121 can be the circuit being made of electro-optical conversioning device, wherein electro-optic conversion
Device is the device for converting electrical signals to optical signal, such as electro-optical conversioning device can be optical modulator.Pass through the first electric light
Second signal is converted to the first optical signal by conversion circuit 121, so that the first optical signal be enable to upload in the first optical fiber 123
It is defeated.
Wherein, the second photoelectric conversion circuit 122 can be the circuit being made of electrooptical device, wherein photoelectric conversion
Device is the device for converting optical signals to electric signal, such as photoelectric sensor.By the second photoelectric conversion circuit 122 by first
Optical signal is converted to second signal, so that second signal be enable to be converted in second signal conversion circuit 112.
Wherein, the isolation voltage rank adaptation of the length of the first optical fiber 123 and siganl thunder-proof device 1.Isolation voltage grade is got over
The length of height, the first optical fiber 123 is longer.Wherein, the length of the first optical fiber 123 is greater than 5mm.Since air insulation performance is 2000
~4000V/mm, in order to meet the isolating power of 10kV, it is desirable that the minimum 5mm of length of the first optical fiber 123.And because temperature
Degree, humidity will affect the insulating properties of air, therefore, when isolation voltage grade is 1.2/50 μ s of 10kV, the first optical fiber 123
Length be 12-15mm；When isolation voltage grade is 1.2/50 μ s of 20kV, the length of the first optical fiber 123 is 20-25mm.?
In practical application, the length of the first optical fiber 123 can be adjusted according to the isolation voltage class requirement of lightning protection.
Optionally, the first optical fiber 123 can be single mode optical fiber or multimode fibre, can be selected according to the actual situation.
Optionally, the first optical fiber 123 is metal-free optical fiber, then the ground potential counterattack and the electrostatic induction of thundercloud of lightning strike spot
Will not in non-metallic fiber induction lightening surge voltage or electric current, so as to avoid optical fiber metal-coating and steel core need
It takes measures to carry out lightning protection, to mitigate the influence for transmitting signal.First optical fiber 123 is without metal-coating and steel core, nothing
It needs to lay, integration of equipmentsization is horizontal high, avoids cumbersome installation process.Certainly, the first optical fiber 123 may be to have metal light
Fibre, as long as the metal-coating and steel core needs to optical fiber take measures to carry out lightning protection.
In the present embodiment, by the first optical fiber 123 by the input signal and second signal of the first signal conversion circuit 111
The output signal of conversion circuit 112 is isolated, and so that electric signal is carried out of short duration paths in the first optical fiber 123, to cut off
The route flowed through by the high pressure that thunder and lightning generates, the high_voltage isolation that thunder and lightning is generated prevent its right in the side of siganl thunder-proof device 1
Electronic equipment damages.Since signal is propagated in a manner of optical signal in the first optical fiber 123, without passing through metal wire
Signal line is propagated, even if thunder and lightning is multiple-pulse electric discharge, in the case where the first optical fiber 123 can not be punctured, and multiple discharge
Also it can not pass through the first optical fiber 123.Meanwhile first optical fiber 123 under the situation of non-breakdown, there is no restore the problem of, will not
Thunder and lightning high pressure is caused to occur the problem of operating voltage leakage later.
Siganl thunder-proof device 1 in the present embodiment is by the first optical fiber 123 of setting, will without changing the transmission mode of signal
Within one device, the various interference signals of signal source end and the interference of power supply conduction can be effectively prevented in one section of optical fiber set
Signal prevents interference of the signal system to power grid, and increases the load capacity of signal source, can meet lightning protection requirement
While, it is at low cost, route is simple, when needing to increase isolation voltage, it is only necessary to increase accordingly the length of the first optical fiber 123 i.e.
It can.
Optionally, circuit board 10 further include: the first micro-processor interface circuit 131 and the second micro-processor interface circuit 132.
Wherein, the first micro-processor interface circuit 131 connects with the first signal conversion circuit 111, the first electro-optical conversion circuit 121 respectively
It connects.Specifically, the input terminal of the first micro-processor interface circuit 131 is connect with the output end of the first signal conversion circuit 111, first micro- place
The output end of reason circuit 131 is connect with the input terminal of the first electro-optical conversion circuit 121.First micro-processor interface circuit 131, which receives, to be passed through
The second signal that first signal conversion circuit 111 transmits carries out coding-control to the second signal, makes the second letter of output
Number binary signal is converted to, so as to more easily carry out subsequent processing.For example, the first micro-processor interface circuit 131 passes through
It is attached with the first signal conversion circuit 111, issues chip selection signal and clock signal into the first signal conversion circuit 111,
To control the first signal conversion circuit 111.In the present embodiment, the first micro-processor interface circuit 131 is specially to encode control
Circuit processed, it is preferable that the first micro-processor interface circuit 131 is system level chip (SoC, System-on-a-Chip).
Wherein, the second micro-processor interface circuit 132 connects with second signal conversion circuit 112, the first photoelectric conversion circuit 122 respectively
It connects.Specifically, the input terminal of the second micro-processor interface circuit 132 is connect with the output end of the first photoelectric conversion circuit 122, second micro- place
The output end of reason circuit 132 is connect with the input terminal of second signal conversion circuit 112.Second micro-processor interface circuit 132, which receives, to be passed through
The second signal that first photoelectric conversion circuit 122 transmits carries out encoded control to the second signal, makes the second letter of output
Number more easily carry out subsequent processing.For example, the second micro-processor interface circuit 132 with second signal conversion circuit 112 by carrying out
Connection issues chip selection signal and clock signal into second signal conversion circuit 112, thus to second signal conversion circuit 112
It is controlled.In the present embodiment, the second micro-processor interface circuit 132 is specially decoding control circuit, it is preferable that the second micro process electricity
Road 132 is system level chip (SoC, System-on-a-Chip).
In the present embodiment, by the way that the first micro-processor interface circuit 131, the second micro-processor interface circuit 132 is arranged, to believe first
Number conversion circuit 111, second signal conversion circuit 112 encoded, encoded control, while also to the first electro-optical conversion circuit
121 signal is sent, the reception of the signal of the first photoelectric conversion circuit 122 is controlled, and improves the automation of siganl thunder-proof device 1
It is horizontal.
Optionally, circuit board 10 further include: main power source 140, the first power supply 141, second source 142 and two isolation transformations
Device 143.Certainly, the quantity of isolating transformer 143 be at least two, for example, 3,4 etc., the number of isolating transformer 143
Amount is related with the quantity of secondary side power supply, can be arranged according to the actual situation.
Wherein, main power source 140, the first power supply 141 and second source 142 are AC power supply.Main power source 140 and two
The primary coil of isolating transformer 143 connects, and one end of the first power supply 141 and the secondary coil of an isolating transformer 143 connect
It connects, one end of second source 142 is connect with the secondary coil of another isolating transformer 143.The other end of first power supply 141 point
It is not connect with the first signal conversion circuit 111, the first electro-optical conversion circuit 121, the first micro-processor interface circuit 131, second source 142
The other end connect respectively with second signal conversion circuit 112, the first photoelectric conversion module 122, the second micro-processor interface circuit 132.
It, can by changing the number of turns of the number of turns of the secondary coil of the first power supply 141 connection, the secondary coil that second source 142 connects
Change the size of the first power supply 141,142 supply voltage of second source.
Wherein, when using direct current supply, alternating current can will be carried out by inverter and direct current is converted.
It is understood that in some other embodiments, the first power supply 141 further includes three separate power source elements, three
A separate power source element and the first signal conversion circuit 111, the first electro-optical conversion circuit 121, the first micro-processor interface circuit 131 are distinguished
Individually connection；Second source 142 further includes three separate power source elements, three separate power source elements and second signal conversion circuit
112, the first photoelectric conversion module 122, the second micro-processor interface circuit 132 individually connect.By the way that individual independent current source is arranged
Each module is powered, to prevent lightning wave from invading signal circuit from power circuit, while avoiding power supply to signal
The pollution of interference and signal to power grid.
It is understood that in some other embodiments, main power source 140, the first power supply 141, second source 142 and two
A isolating transformer 143 can be not provided on the circuit board 10, main power source 140, the first power supply 141, second source 142 and two
Isolating transformer 143 is built in cavity, and the first power supply 141, second source 142 respectively with the circuit module on circuit board 10
It is correspondingly connected with.
It is understood that circuit board 10 can also include that (figure is not for two rectifier circuits in some other embodiments
Show), the secondary coil of two isolating transformers 143 is connect with two rectifier circuits respectively, and two rectifier circuits are distinguished again
Connect with the first power supply 141, second source 142, can effective protection power supply, do not invade power supply from data side surge damage
It is bad.
In the present embodiment, using the first power supply 141 and second source 142 to the input module of siganl thunder-proof device 1 and defeated
Module is powered respectively out, is avoided lightning surge voltage and is punctured by power supply；Also, pass through isolating transformer 143 for power supply
Input terminal and output end isolation, while the power supply of different output loops being isolated, it can be improved the lightning protection of siganl thunder-proof device
Characteristic.
In some embodiments, Fig. 2 a is please referred to, when inputting analog signal, the first signal conversion circuit 111 is modulus
Conversion circuit, second signal conversion circuit 112 are D/A converting circuit, and the first signal is analog signal, and second signal is number
Signal.
Specifically, analog to digital conversion circuit will be for that will input analog signal, and be converted to digital signal and export；First electric light
Conversion circuit 121 is used to input the digital signal of analog to digital conversion circuit output, and converts digital signals into the first optical signal simultaneously
Output；First optical fiber 123 transmits first optical signal；First photoelectric conversion circuit 122 is used to input the transmission of the first optical fiber 123
First optical signal, and the first optical signal is converted into digital signal and is exported；D/A converting circuit turns for inputting the first photoelectricity
The digital signal of the output of circuit 122 is changed, and the digital signal is converted into analog signal and is exported.
Wherein, analog to digital conversion circuit uses 8,12 or 16 etc. output digit signals according to required precision selection
Digit.Connection between analog to digital conversion circuit and the first electro-optical conversion circuit 121 can be parallel connection or serial connection.Mould
Number conversion circuit converts Time Continuous, the continuous analog signal of amplitude after 4 over-sampling, holding, quantization and coding processes
For the digital signal that time discrete, amplitude are discrete.Wherein, above-mentioned 4 processes, which can be, merges progress, for example, sampling and guarantor
It holds, quantifies and encode all to be often in analog-digital conversion process while to realize.
Wherein, the signal conversion of the first micro-processor interface circuit 131 control analog to digital conversion circuit, the first electro-optical conversion circuit 121
The output of first optical signal of reading and the first electro-optical conversion circuit 121 to signal.
Wherein, D/A converting circuit uses 8,12 or 16 etc. output analog signals according to required precision selection
Digit.Connection between D/A converting circuit and the first photoelectric conversion circuit 122 can be parallel connection or serial connection.Number
Time discrete, amplitude also discrete digital signal are converted to Time Continuous, amplitude also continuous analog signal by analog conversion circuit.
Wherein, the second micro-processor interface circuit 132 controls the first photoelectric conversion circuit 122 to the reading of the first optical signal, first
Photoelectric conversion circuit 122 converts the output of signal and the signal of D/A converting circuit.
In the present embodiment, when input signal is analog signal, pass through setting analog to digital conversion circuit and digital-to-analogue conversion electricity
The lightning protection of analog signal is realized on road.
In some embodiments, due to RS485 noise resistance strong antijamming capability, long transmission distance, support multi-point, it is
Industry control industry first choice serial line interface.Fig. 2 b is please referred to, when inputting RS485 signal, the first signal conversion circuit 111 is RS485
Signal transmitting and receiving/coding circuit, second signal conversion circuit 112 are RS485 signal transmitting and receiving/decoding circuit, and the first signal is RS485
Signal, second signal are TTL signal.
Specifically, RS485 signal transmitting and receiving/coding circuit be for will input RS485 signal, and be converted to TTL signal and defeated
Out；First electro-optical conversion circuit 121 is used to input the TTL signal of RS485 signal transmitting and receiving/coding circuit output, and by TTL signal
It is converted to the first optical signal and exports；First optical fiber 123 transmits first optical signal；First photoelectric conversion circuit 122 is for defeated
Enter the first optical signal of the first optical fiber 123 transmission, and the first optical signal is converted into TTL signal and is exported；RS485 signal is received
Hair/decoding circuit is used to input the TTL signal of the first photoelectric conversion circuit 122 output, and the TTL signal is converted to RS485
Signal simultaneously exports.
Wherein, RS485 signal is the signal of RS485 signal communication interface transmission；TTL signal is Transistor-Transistor Logic level signal.
Wherein, RS485 signal transmitting and receiving/coding circuit includes RS485 signal transmitting and receiving sub-circuit and coding sub-circuit.RS485
Signal transmitting and receiving sub-circuit is converted into TTL signal and sends for receiving RS485 signal；Encode sub-circuit for pair
The TTL signal of RS485 signal transmitting and receiving sub-circuit output is encoded, and so that TTL signal is converted to binary signal, so as to more
Add and easily carries out subsequent processing.Optionally, RS485 signal transmitting and receiving sub-circuit can be RS485 chip.It is alternatively possible to root
According to the bandwidth and delay requirement of signal system, different chips is selected.
Wherein, the conversion of the first micro-processor interface circuit 131 control RS485 signal transmitting and receiving/coding circuit signal, the first electric light turn
Change output of the circuit 121 to the reading of signal and the first optical signal of the first electro-optical conversion circuit 121.
Wherein, RS485 signal transmitting and receiving/decoding circuit includes RS485 signal transmitting and receiving sub-circuit and decoding sub-circuit.Decoding
Circuit is used to receive the binary signal of the first photoelectric conversion circuit 122 output, and is converted into TTL signal and exports；
RS485 signal transmitting and receiving sub-circuit is used to receive the TTL signal that decoding sub-circuit exports, and is converted into RS485 signal and defeated
Out.Optionally, RS485 signal transmitting and receiving sub-circuit can be RS485 chip.It is alternatively possible to according to the bandwidth of signal system and
Delay requirement selects different chips.
Wherein, the second micro-processor interface circuit 132 controls the first photoelectric conversion circuit 122 to the reading of the first optical signal, first
Photoelectric conversion circuit 122 converts the output of signal and RS485 signal transmitting and receiving/decoding circuit signal.
In the present embodiment, when input signal be RS485 signal when, by setting RS485 signal transmitting and receiving/coding circuit and
RS485 signal transmitting and receiving/decoding circuit realizes the lightning protection of RS485 signal.
In some embodiments, Ethernet (Ethernet) is current most widely used Local network communication mode, usually
Data exchange is carried out by Ethernet interface and the network equipment.Fig. 2 c is please referred to, when inputting ethernet signal, the first signal turns
Changing circuit 111 is ethernet signal transmitting-receiving/coding circuit, and second signal conversion circuit 112 is ethernet signal transmitting-receiving/decoding electricity
Road, the first signal are ethernet signal, and second signal is TTL signal.
Specifically, ethernet signal transmitting-receiving/coding circuit will be for that will input ethernet signal, and be converted to TTL signal simultaneously
Output；First electro-optical conversion circuit 121 is used to input the TTL signal of ethernet signal transmitting-receiving/coding circuit output, and by TTL
Signal is converted to the first optical signal and exports；First optical fiber 123 transmits first optical signal；First photoelectric conversion circuit 122 is used
In the first optical signal of input the first optical fiber 123 transmission, and the first optical signal is converted into TTL signal and is exported；Ethernet letter
Number transmitting-receiving/decoding circuit is used to input the TTL signal that the first photoelectric conversion circuit 122 exports, and by the TTL signal be converted to
It net signal and exports very much.
Wherein, ethernet signal is the signal of Ethernet interface transmission, for example, Ethernet interface can connect for SC optical fiber
Mouth, RJ-45 interface, fddi interface, AUI interface etc.；TTL signal is Transistor-Transistor Logic level signal.
Wherein, ethernet signal transmitting-receiving/coding circuit includes ethernet signal transmitting-receiving sub-circuit and coding sub-circuit.Ether
Net signal transmitting and receiving sub-circuit is converted into TTL signal and sends for receiving ethernet signal；Encode sub-circuit for pair
The TTL signal of ethernet signal transmitting-receiving sub-circuit output is encoded, and TTL signal is made to be converted to binary signal, so as to
More easily carry out subsequent processing.Optionally, ethernet signal transmitting-receiving sub-circuit can be TCP/IP to serial ports bridge chip.
It is alternatively possible to select different chips according to the bandwidth and delay requirement of signal system.
Wherein, the conversion of the first micro-processor interface circuit 131 control ethernet signal transmitting-receiving/coding circuit signal, the first electric light
Output of the conversion circuit 121 to the reading of signal and the first optical signal of the first electro-optical conversion circuit 121.
Wherein, ethernet signal transmitting-receiving/decoding circuit includes ethernet signal transmitting-receiving sub-circuit and decoding sub-circuit.Decoding
Sub-circuit is used to receive the binary signal of the first photoelectric conversion circuit 122 output, and is converted into TTL signal and exports；
Ethernet signal transmitting-receiving sub-circuit is used to receive the TTL signal of decoding sub-circuit output, and is converted into ethernet signal simultaneously
Output.Optionally, ethernet signal transmitting-receiving sub-circuit can be serial ports to TCP/IP bridge modules chip.It is alternatively possible to root
According to the bandwidth and delay requirement of signal system, different chips is selected.
Wherein, the second micro-processor interface circuit 132 controls the first photoelectric conversion circuit 122 to the reading of the first optical signal, first
Photoelectric conversion circuit 122 converts the output of signal and ethernet signal transmitting-receiving/decoding circuit signal.
In the present embodiment, when input signal is ethernet signal, by the way that ethernet signal transmitting-receiving/coding circuit is arranged
With ethernet signal transmitting-receiving/decoding circuit, the lightning protection of ethernet signal is realized.
Fig. 3 is a kind of structural schematic diagram for siganl thunder-proof device that another embodiment of the utility model provides.When in two-way biography
When defeated RS485 signal or ethernet signal carry out lightning protection, as shown in figure 3, the circuit board 10 of the siganl thunder-proof device 1 further includes the
Three signal conversion circuits 113, fourth signal conversion circuit 114, the second electro-optical conversion circuit 124, the second photoelectric conversion circuit
125, the second optical fiber 126.
Wherein, third signal conversion circuit 113 is connect with the second electro-optical conversion circuit 124, the second electro-optical conversion circuit 124
Connect with the second optical fiber 126, the second optical fiber 126 is connect with the second photoelectric conversion circuit 125, the second photoelectric conversion circuit 125 with
Fourth signal conversion circuit 114 connects.
Specifically, third signal conversion circuit 113 is for inputting third signal, and third signal is converted to fourth signal
And it exports.Second electro-optical conversion circuit 124 is used to input the fourth signal of the output of third signal conversion circuit 113, and by this
Four signals are converted to the second optical signal and export.Second optical fiber 126 is used for transmission the second optical signal.Second photoelectric conversion circuit
125 for inputting the second optical signal of the second optical fiber 126 transmission, and second optical signal is converted to fourth signal and is exported.
Fourth signal conversion circuit 114 is used to input the fourth signal of the second photoelectric conversion circuit 125 output, and the fourth signal is turned
It is changed to third signal and exports.
Optionally, third signal conversion circuit 113 is identical as the first signal conversion circuit 111 in above-described embodiment, the
Four signal conversion circuits 114 are identical as the second signal conversion circuit 112 in above-described embodiment；Second electro-optical conversion circuit 124
It is identical as the first electro-optical conversion circuit 121 in above-described embodiment, the second photoelectric conversion circuit 125 and the in above-described embodiment
One photoelectric conversion circuit 122 is identical, and the second optical fiber 126 is identical as the first optical fiber 123 in above-described embodiment.
Wherein, the first micro-processor interface circuit 131 also respectively with fourth signal conversion circuit 114, the second photoelectric conversion circuit 125
Connection, the second micro-processor interface circuit 132 are also connect with third signal conversion circuit 113, the second electro-optical conversion circuit 124 respectively.?
In the present embodiment, the second micro-processor interface circuit 132 receives the fourth signal transmitted by third signal conversion circuit 113 to this
Fourth signal carries out coding-control, so that the fourth signal of output is converted to binary signal, so as to more easily carry out
Subsequent processing.First micro-processor interface circuit 131 receives the fourth signal transmitted by the second photoelectric conversion circuit 125, to this
Fourth signal carries out encoded control, and the fourth signal of output is made more easily to carry out subsequent processing.
Wherein, the first power supply 141 is connect with fourth signal conversion circuit 114, the second photoelectric conversion circuit 125 respectively, the
Two power supplys 142 are connect with third signal conversion circuit 113, the second electro-optical conversion circuit 124 respectively, to be powered to it.
Optionally, the first signal is Tx signal, and second signal is TTL signal, and third signal is Rx signal, and fourth signal is
TTL signal.Wherein, Tx signal includes Tx+/Tx- signal, and Rx signal includes Rx+/Rx- signal.Accordingly, the first signal is converted
Circuit 111, third signal conversion circuit 113 can be RS485 signal transmitting and receiving/coding circuit or ethernet signal transmitting-receiving/coding
Circuit；Second signal conversion circuit 112, fourth signal conversion circuit 114 can for RS485 signal transmitting and receiving/decoding circuit or with
Too net signal transmitting and receiving/decoding circuit.When the electronics connecting with the first signal conversion circuit 111, fourth signal conversion circuit 114 is set
For when needing to emit signal, the first signal conversion circuit 111 receives Tx signal, and Tx signal is converted to TTL signal；First electricity
TTL signal is converted to the first optical signal by light conversion circuit 121, is then exported to the first optical fiber 123；First optical fiber 123 is by
One optical signal transmission to the first photoelectric conversion module 122；First optical signal is converted to TTL letter by the first photoelectric conversion module 122
Number, it then exports to second signal conversion circuit 112；TTL signal is reduced to Tx signal by second signal conversion circuit 112, so
After export.When the electronic equipment connecting with the first signal conversion circuit 111, fourth signal conversion circuit 114 needs to receive signal
When, third signal conversion circuit 113 receives Rx signal, and Rx signal is converted to TTL signal；Second electro-optical conversion circuit 124
TTL signal is converted into the second optical signal, is then exported to the second optical fiber 126；Second optical fiber 126 by the second optical signal transmission extremely
Second photoelectric conversion module 125；Second optical signal is converted to TTL signal by the second photoelectric conversion module 125, is then exported to
Four signal conversion circuits 114；TTL signal is reduced to Rx signal by fourth signal conversion circuit 114, is then exported.
In the present embodiment, by the first optical fiber 123 by the input signal and second signal of the first signal conversion circuit 111
The output signal of conversion circuit 112 is isolated, by the second optical fiber 126 by the input signal of third signal conversion circuit 113 and the
The output signal of four signal conversion circuits 114 is isolated, and carries out electric signal in the first optical fiber 123, the second optical fiber 126 of short duration
Paths, to cut off the route flowed through by the high pressure that thunder and lightning generates, the high_voltage isolation that thunder and lightning is generated is in signal lighting protection
The side of device 1, prevents it from damaging to electronic equipment.Signal source can be effectively prevented in siganl thunder-proof device 1 in the present embodiment
The interference signal of various interference signals and the power supply conduction at end prevents interference of the signal system to power grid, and increases signal
The load capacity in source, can be at low cost, route is simple while meeting lightning protection requirement.
Fig. 4 is a kind of flow diagram for signal lighting protection method that another embodiment of the utility model provides.The signal is anti-
Thunder method 200 is used for the siganl thunder-proof device 100 in above-described embodiment, which includes:
210, the first signal is inputted, and first signal is converted into second signal and is exported；
220, the second signal is inputted, and the second signal is converted into the first optical signal and is exported；
230, the first optical signal described in short-distance transmission；
240, first optical signal is inputted, and first optical signal is converted into the second signal and is exported；
250, the second signal is inputted, and the second signal is converted into first signal and is exported.
Since 200 embodiment of signal lighting protection method and 100 Installation practice of siganl thunder-proof device are to be based on same design,
Under the premise of content does not conflict mutually, the content of embodiment of the method can quote Installation practice, and this will not be repeated here.
Signal lighting protection method 200 in the present embodiment is by short-distance transmission optical signal, without changing the transmission side of signal
Within one device by one section of optical fiber set the various interference signals and power supply conduction of signal source end can be effectively prevented in formula
Interference signal, prevent interference of the signal system to power grid, and increase the load capacity of signal source, can be to meet thunder and lightning anti-
Shield is while require, at low cost, route is simple.It should be noted that being given in the specification and its attached drawing of the utility model
The preferable embodiment of the utility model, still, the utility model can realize by many different forms, and unlimited
The embodiment described in this specification, these embodiments are provided not as the additional limitation to the content of the present invention
The purpose of these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive.Also, above-mentioned each skill
Art feature continues to be combined with each other, and forms the various embodiments not being enumerated above, is accordingly to be regarded as the record of the utility model specification
Range；Further, for those of ordinary skills, it can be modified or changed according to the above description, and institute
There are these modifications and variations all and should belong to the protection scope of the appended claims for the utility model.
Claims (10)
1. a kind of siganl thunder-proof device characterized by comprising cavity and the circuit board for being built in the cavity, the circuit
Plate includes:
First signal for inputting the first signal, and is converted to second signal and exported by the first signal conversion circuit；
First electro-optical conversion circuit is connect with first signal conversion circuit, for inputting the second signal, and will be described
Second signal is converted to the first optical signal and exports；
First optical fiber is connect with first electro-optical conversion circuit, is used for transmission first optical signal；
First photoelectric conversion circuit is connect with first optical fiber, for inputting first optical signal, and by first light
Signal is converted to the second signal and exports；
Second signal conversion circuit is connect with first photoelectric conversion circuit, for inputting the second signal, and will be described
Second signal is converted to first signal and exports.
2. siganl thunder-proof device according to claim 1, which is characterized in that the circuit board further include:
First micro-processor interface circuit is connect with first signal conversion circuit, first electro-optical conversion circuit respectively；
Second micro-processor interface circuit is connect with the second signal conversion circuit, first photoelectric conversion circuit respectively.
3. siganl thunder-proof device according to claim 2, it is characterised in that: the circuit board further include:
First power supply, it is electric with first signal conversion circuit, first electro-optical conversion circuit, first micro process respectively
Road connection；
Second source, it is electric with the second signal conversion circuit, first photoelectric conversion module, second micro process respectively
Road connection.
4. siganl thunder-proof device according to claim 3, it is characterised in that: the circuit board further include: main power source and at least
Two isolating transformers, the main power source are connect with the primary coil of two isolating transformers, first power supply and institute
Second source is stated to connect with the secondary coil of two isolating transformers respectively.
5. siganl thunder-proof device according to claim 4, which is characterized in that
First signal is analog signal, and the second signal is digital signal；
First signal conversion circuit is analog to digital conversion circuit, and the second signal conversion circuit is D/A converting circuit.
6. siganl thunder-proof device according to claim 4, which is characterized in that
First signal is RS485 signal, and the second signal is TTL signal；
First signal conversion circuit is RS485 signal transmitting and receiving/coding circuit, and the second signal conversion circuit is RS485
Signal transmitting and receiving/decoding circuit.
7. siganl thunder-proof device according to claim 4, which is characterized in that
First signal is ethernet signal, and the second signal is TTL signal；
First signal conversion circuit is ethernet signal transmitting-receiving/coding circuit, and the second signal conversion circuit is ether
Net signal transmitting and receiving/decoding circuit.
8. siganl thunder-proof device according to claim 6 or 7, which is characterized in that the circuit board further include:
The third signal for inputting third signal, and is converted to fourth signal and exported by third signal conversion circuit；
Second electro-optical conversion circuit is connect with the third signal conversion circuit, for inputting the fourth signal, and will be described
Fourth signal is converted to the second optical signal and exports；
Second optical fiber is connect with second electro-optical conversion circuit, is used for transmission second optical signal；
Second photoelectric conversion circuit is connect with second optical fiber, for inputting second optical signal, and by second light
Signal is converted to the fourth signal and exports；
Fourth signal conversion circuit is connect with second photoelectric conversion circuit, for inputting the fourth signal, and will be described
Fourth signal is converted to the third signal and exports；
First micro-processor interface circuit is connect with the fourth signal conversion circuit, second photoelectric conversion circuit respectively, institute
The second micro-processor interface circuit is stated to connect with the third signal conversion circuit, second electro-optical conversion circuit respectively；
First power supply is connect with the fourth signal conversion circuit, second photoelectric conversion circuit respectively, and described second
Power supply is connect with the third signal conversion circuit, second electro-optical conversion circuit respectively.
9. siganl thunder-proof device according to claim 1-6, which is characterized in that the length of first optical fiber and institute
The isolation voltage rank adaptation of siganl thunder-proof device is stated, the isolation voltage higher grade, and the length of first optical fiber is longer.
10. siganl thunder-proof device according to claim 9, which is characterized in that first optical fiber is metal-free optical fiber, the nothing
Metal optical fiber length range is 12mm-20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820731285.XU CN208256090U (en) | 2018-05-16 | 2018-05-16 | A kind of siganl thunder-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820731285.XU CN208256090U (en) | 2018-05-16 | 2018-05-16 | A kind of siganl thunder-proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208256090U true CN208256090U (en) | 2018-12-18 |
Family
ID=66480630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820731285.XU Active CN208256090U (en) | 2018-05-16 | 2018-05-16 | A kind of siganl thunder-proof device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208256090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110503820A (en) * | 2018-05-16 | 2019-11-26 | 深圳市安特博防雷技术有限公司 | A kind of siganl thunder-proof device |
-
2018
- 2018-05-16 CN CN201820731285.XU patent/CN208256090U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110503820A (en) * | 2018-05-16 | 2019-11-26 | 深圳市安特博防雷技术有限公司 | A kind of siganl thunder-proof device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101651472B (en) | Carrier wave communication device of power line and carrier wave communication method thereof | |
| CN104506375B (en) | Power wire broadband carrier communication network module test system | |
| US20070178850A1 (en) | Radio frequency signal coupling system | |
| CN103308832A (en) | Partial discharge test device for high-voltage cable insulation middle joint and use method | |
| CN106375010B (en) | A kind of fiber optic local area network CAN bus control device and networking | |
| CN101777936B (en) | Surge immunity test method of high-speed signal wire | |
| CN208256090U (en) | A kind of siganl thunder-proof device | |
| CN102594411A (en) | Transmission device for power line carrier communication | |
| CN110503820A (en) | A kind of siganl thunder-proof device | |
| CN108988312A (en) | A kind of submarine observation network secondary is plugged into the electric power distribution system and submarine observation network system of box | |
| CN202840439U (en) | Double ground wire connecting system | |
| CN102629882A (en) | Power carrier communication system of cable shielding layer | |
| CN204028205U (en) | A kind of polarization-depolarization current pick-up unit for crosslinked polyethylene midium voltage cable | |
| CZ149699A3 (en) | Inductor | |
| CN102565583A (en) | Power quality monitoring terminal for switch-in electronic mutual inductor | |
| CN203071957U (en) | Photoelectric network bridge device combining electric power line and optical fibers | |
| CN202524418U (en) | Transmission device for power carrier communication | |
| CN112510492A (en) | Grounding box capable of switching grounding modes of high-voltage cable and electronic device | |
| CN208369591U (en) | Interference and insulation device for railway coaxial cable | |
| CN207798936U (en) | Shunt reactor switching overvoltage tests system | |
| CN203563091U (en) | An Ethernet switch with an EoC port | |
| CN203313216U (en) | Multi-medium internet gateway device | |
| CN202424316U (en) | Power quality monitoring terminal applicable to smart grid | |
| CN105490382A (en) | Uplink signal processing method | |
| CN201015061Y (en) | High-voltage current voltage waveform integrated optical fiber precision sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |