CN107707307B - GEPON optical repeater for smart power grid - Google Patents
GEPON optical repeater for smart power grid Download PDFInfo
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- CN107707307B CN107707307B CN201710572170.0A CN201710572170A CN107707307B CN 107707307 B CN107707307 B CN 107707307B CN 201710572170 A CN201710572170 A CN 201710572170A CN 107707307 B CN107707307 B CN 107707307B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13191—Repeater
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Abstract
The invention relates to optical relay equipment for optical power enhancement in the technical field of GEPON (gigabit passive optical network), in particular to a GEPON (gigabit passive optical network) optical relay for an intelligent power grid, which comprises a mechanical switching unit, a WDM (wavelength division multiplexing) unit, a circuit module, a microprocessor module and a power supply unit, wherein the mechanical switching unit comprises a plurality of one-to-two optical splitters, splitter switching joints and splitter switching motors, the mechanical switching unit is positioned between the WDM unit and an ONU (optical network unit), the splitter switching joints are fixed on rotors of the splitter switching motors, the splitter switching motors are controlled by the microprocessor module, the splitter switching joints are clamped with the one-to-two optical splitters, and two branch optical fibers of the one-to-two optical splitters are connected with the ONU. The invention has the beneficial effects that: a mechanical switching unit is added in the traditional optical repeater, so that the problem of distributing optical power according to the requirements of the ONU is solved.
Description
Technical Field
The invention relates to the technical field of Gigabit Ethernet Passive Optical Networks (GEPON), in particular to optical relay equipment for enhancing optical power.
Background
In the process of constructing the smart grid by using the gigabit ethernet-based passive optical network (hereinafter referred to as GEPON, or gigabit ethernet passive optical network), the cost of controlling the communication system is the key point for obtaining economic benefits. The power grid application environment is obviously different from the telecommunication network, the telecommunication network GEPON is a technology developed aiming at the home broadband access, the Optical Network Units (ONU) of the telecommunication network are distributed more densely, the optical splitters with the number of multiple ports are generally used, the usage amount of the optical splitters with the number of sixteen per minute and thirty per minute is the largest, the number of the optical splitters is smaller, the ONU distribution is generally within two levels, the ONU distribution of the intelligent power grid GEPON is sparser, the distance between the ONUs is farther, the optical splitters with one minute and two minutes are mainly used, particularly in the application of chain-shaped and hand-pulling networking, the optical power distribution of the network structure is unreasonable, the number of the optical splitters is more, the optical power distributed by the front-stage ONU is more, the waste is larger, the optical power distributed by the rear-stage ONU is reduced, the power to the end ONU is insufficient step by step, the number of the ONU accessed to the intelligent power grid GEPON is limited, and the backup optical circuit also needs an Optical Line Terminal (OLT) to, at this time, the OLT also occupies ONU interface resources, thereby limiting the number of ONUs. Therefore, a GEPON optical repeater for a smart grid needs to be developed to meet the ONU optical power requirement.
Chinese patent publication No. CN 104954073 a, published on 2015, 9/30, is a universal intelligent GEPON optical power enhancement device, which is equipped with a dual optical port self-healing protection function GEPON ONU, and can remotely manage the network, extend the transmission distance of the GEPON, and increase the number of optical branches; the device can meet the requirements of industrial environment and has the characteristics of miniaturization and rail clamping type installation. The device comprises a GEPON ONU, a downlink signal regeneration circuit, an uplink signal regeneration circuit, a multi-task operating system, an equipment network management software module, a man-machine interface software module, a power supply protection circuit and other functional modules. However, the intelligent GEPON optical power enhancement device cannot solve the problem of unreasonable optical power distribution, and the invention adds a mechanical switching unit in the conventional optical repeater to solve the problem of distributing optical power according to the requirements of the ONUs.
Disclosure of Invention
The invention aims to solve the technical problem of unreasonable ONU optical power distribution of the GEPON of the smart grid.
The technical scheme adopted by the invention for solving the problems is as follows: a GEPON optical repeater for a smart power grid comprises a mechanical switching unit, a WDM unit, a circuit module, a microprocessor module and a power supply unit, and is characterized in that the mechanical switching unit comprises a plurality of one-to-two optical splitters, optical splitter switching connectors and optical splitter switching motors, the mechanical switching unit is located between the WDM unit and an ONU, the optical splitter switching connectors are fixed to rotors of the optical splitter switching motors, the optical splitter switching motors are controlled by the microprocessor module, the optical splitter switching connectors are connected with the one-to-two optical splitters in a clamped mode, and two branch optical fibers of the one-to-two optical splitters are connected with the ONU; the WDM unit comprises a wavelength division multiplexer A and a wavelength division multiplexer B, wherein the wavelength division multiplexer A is connected between the OLT and the circuit module through an optical fiber, and the wavelength division multiplexer B is connected between the circuit module and the mechanical switching unit through an optical fiber.
Preferably, the mechanical switching unit comprises the following working steps:
s1: calculating the optical power requirement p of the ONU connected with the mechanical switching unit, wherein the calculation formula is
In the formula piFor the power demanded of the individual services in the network, AiIs the weight coefficient of the service, KiIs the attenuation of the ith section of optical fiber, LiIs the attenuation of the ith movable connector, Fi is the attenuation of the ith optical fiber fusion splice, McFor fiber redundancy, M is used when the transmission distance is less than 5kmcTaking value in the range of [1,2), when the transmission distance is more than 5km and less than 10km, McTaking value in the range of [2, 3), when the transmission distance is more than 10km, McTaking a value greater than 3;
s2: corresponding the calculation result of the optical power requirement p with the table, and selecting a one-to-two optical splitter which is suitable for the optical power requirement of the ONU;
s3: the microprocessor module controls the optical splitter to switch the motor, and the rotor drives the optical splitter switching joint to switch to a corresponding one-to-two optical splitter;
preferably, the circuit module comprises an uplink signal regeneration circuit, a downlink signal regeneration circuit, a parallel-serial/serial-parallel conversion circuit and a DDM digital diagnosis circuit; the microprocessor module comprises an FPGA unit and an auxiliary CPU unit and is used for controlling the mechanical switching unit and the circuit module.
Preferably, the beam splitter switching motor is a stepping motor, and the angular displacement of the stepping motor is controlled by the microprocessor module and used for switching a one-to-two beam splitter.
Preferably, the one-to-two optical splitter further comprises an optical splitter switching interface, which is clamped with the optical splitter switching connector, the optical splitter switching interface is composed of a spring, a metal sheet and a gasket, the spring and the metal sheet are used for sliding in and out of the optical splitter switching connector, the spring is located on two sides of the optical splitter switching interface, the metal sheet traverses the whole optical splitter switching interface from the middle part and is divided into an upper sheet and a lower sheet, the metal sheet at the optical splitter switching interface is arc-shaped, and the spring is arranged right above/below the metal sheet; the metal sheet in the middle of the switching interface of the optical splitter is arc-shaped, and the curvature radius of the metal sheet is the same as that of the switching interface of the optical splitter; the gasket is used for fixing the middle part of the metal sheet, and the distance between the two gaskets is equal to the diameter of the optical splitter switching joint and used for fixing the optical splitter switching joint.
Preferably, the splitter switching interface further includes a limit key, the splitter switching joint includes a key groove, and the limit key and the key groove are used for aligning the optical fiber section of the splitter switching interface with the optical fiber section of the splitter switching joint.
Preferably, the types of the splitting ratio of the one-to-two splitter are 10:90, 20:80, 30:70, 40:60 and 50:50, the one-to-two splitter is sequentially formed into a ring shape from top to bottom to meet the optical power requirements of different ONUs, and the microprocessor module controls the step motor to work as follows:
s1: the microprocessor module controls the reset of the stepping motor, and the reset position is a 10:90 one-to-two optical splitter;
s2: obtaining a gear n corresponding to the one-to-two optical splitter according to the result of calculating the optical power requirement p, wherein the gear n corresponds to 0, 1,2, 3, 4 and 5 in the sequence of the 10:90, 20:80, 30:70, 40:60 and 50:50 one-to-two optical splitters;
s3: the microprocessor module sends high levels to the stepping motor according to the gear number, and n gears send n high levels;
s4: the stepping motor receives a high level and moves one-to-two optical splitter in sequence, and the stepping motor receives n high levels and moves the high levels to the corresponding one-to-two optical splitter.
Preferably, the uplink signal regeneration circuit comprises an uplink receiving and amplifying unit and an uplink transmitting unit, is used for carrying out re-amplification, reshaping and retiming on the uplink signal, and is electrically connected with the FPGA unit through the parallel-serial/serial-parallel conversion circuit and the DDM digital diagnosis circuit.
Preferably, the downlink signal regeneration circuit includes a downlink receiving and amplifying unit and a downlink transmitting unit, and is configured to re-amplify, re-shape and re-time the downlink signal, and is electrically connected to the FPGA unit through a parallel-to-serial/serial-to-parallel conversion circuit.
Preferably, the GEPON optical repeater for the smart grid further includes a reset key and an indicator light, the indicator light includes an uplink indicator light and a downlink indicator light, the downlink indicator light is used to indicate that the optical repeater receives a downlink optical signal from the OLT, and is mechanically fixed to the outer side of the front face of the optical repeater, and the downlink indicator light is a red LED light; the uplink indicator light is used for indicating that the optical repeater receives an uplink optical signal from the ONU, is mechanically fixed on the outer side of the front face of the optical repeater, and is a green LED lamp.
The substantial effects of the invention are as follows: a mechanical switching unit is added in the traditional optical repeater, so that the problem of distributing optical power according to the requirements of the ONU is solved.
Drawings
Fig. 1 is a GEPON network topology diagram of a primary optical repeater.
Fig. 2 is a structural diagram of a GEPON optical repeater for a smart grid.
Fig. 3 is a structural diagram of a mechanical switching unit in the GEPON optical repeater.
Fig. 4 is a cross-sectional view of the splitter switching sub and interface structure.
In the figure: 1. a mechanical switching unit, 2, a WDM unit, 3, a circuit module, 4, a microprocessor module, 5, a power supply unit, 6, a downlink receiving and amplifying unit, 7, a downlink transmitting unit, 8, an uplink transmitting unit, 9, an uplink receiving and amplifying unit, 10, a parallel-serial/serial-parallel conversion circuit, 11, an FPGA unit, 12, a reset key and an indicator light, 13, an auxiliary CPU unit, 14, an Ethernet port, 15, a splitter switching motor, 16, a splitter switching joint, 17, 10:90 one-to-two splitters, 18, 20:80 one-to-two splitters, 19, 30:70 one-to-two splitters, 20, 40:60 one-to-two splitters, 21, 50:50 one-to-two splitters, 22, splitter switching interfaces, 23, fiber sections of the splitter switching interfaces, 24, fiber sections of the splitter switching joints, 25, limit keys, 26 and a key groove, 27. metal sheet, 28, spring, 29, gasket, 30, DDM digital diagnostic circuit.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
Fig. 1 is a GEPON network topology diagram of a primary optical repeater, and a typical power system GEPON network includes a network management computer, an OLT, an optical splitter, a GEPON optical repeater, and a plurality of ONUs, where the OLT is a terminal device for connecting an optical trunk line, the OLT is configured to send ethernet data to the ONUs in a broadcast manner, and the optical splitter is generally used in the GEPON network to implement a point-to-multipoint optical splitting function. Because GEPON has the characteristics of low cost, powerful function, flexible networking and the like, the GEPON gradually becomes the mainstream technology of an optical access network, but different from a telecommunication network, the telecommunication network generally uses optical splitters with multiple ports, the use amount of the optical splitters is the largest by one to sixteen and one to thirty two optical splitters, so the stages of the optical splitters are few and generally within two stages, the ONU distribution of the GEPON of the smart grid is sparse, the distance between the ONUs is long, one-to-two optical splitters are mainly used, particularly in the application of chain-shaped and hand-pull networking, the optical power distribution of the network structure is unreasonable, so that the stages of the optical splitters are many, the optical power distributed by front-stage ONUs is large, the waste is large, the optical power distributed by rear-stage ONUs is gradually reduced, the power is insufficient to the tail-end ONU power, the number of the ONUs accessed to the smart grid GEPON is limited, meanwhile, a standby optical loop also needs the OLT to provide PON port connection, thereby limiting the number of ONUs. As shown in fig. 1, the power budget of the optical link can be doubled by adding a first-level optical repeater in the middle of the optical fiber network. If the mechanical switching unit 1 is added into the traditional GEPON optical repeater, the power distributed to the branch network can be timely adjusted according to the power required by the ONU2, the utilization efficiency of the whole optical network can be improved by adjusting the power distribution immediately after the optical link is lifted, and the problem of distributing the optical power according to the requirements of the ONU is solved.
As shown in fig. 2-3, a GEPON optical repeater for a smart grid includes a mechanical switching unit 1, a WDM unit 2, a circuit module 3, a microprocessor module 4, and a power supply unit 5, where the mechanical switching unit 1 includes a plurality of one-to-two optical splitters, an optical splitter switching connector 16, and an optical splitter switching motor 15, the mechanical switching unit 1 is located between the WDM unit 2 and an ONU, the optical splitter switching connector 16 is fixed to a rotor of the optical splitter switching motor 15, the optical splitter switching motor 15 is controlled by the microprocessor module 4, the optical splitter switching connector 16 is connected to a one-to-two optical splitter in a snap-in manner, and two branch optical fibers of the one-to-two optical splitter are connected to the ONU; the WDM unit 2 includes a wavelength division multiplexer a and a wavelength division multiplexer B, the wavelength division multiplexer a is connected between the OLT and the circuit module 3 through an optical fiber, and the wavelength division multiplexer B is connected between the circuit module 3 and the mechanical switching unit 1 through an optical fiber. The circuit module 3 comprises an uplink signal regeneration circuit, a downlink signal regeneration circuit, a parallel-serial/serial-parallel conversion circuit 10 and a DDM digital diagnosis circuit 30; the microprocessor module 4 comprises an FPGA unit 11 and an auxiliary CPU unit 13 for controlling the mechanical switching unit 1 and the circuit module 3. The uplink signal regeneration circuit comprises an uplink receiving and amplifying unit 9 and an uplink sending unit 8, is used for carrying out re-amplification, reshaping and retiming on an uplink signal, and is electrically connected with the FPGA unit 11 through a parallel-serial/serial-parallel conversion circuit 10 and a DDM digital diagnosis circuit 30. The downlink signal regeneration circuit comprises a downlink receiving and amplifying unit 6 and a downlink sending unit 7, is used for carrying out re-amplification, reshaping and retiming on a downlink signal, and is electrically connected with an FPGA unit 11 through a parallel-serial/serial-parallel conversion circuit 10. The auxiliary CPU unit 13 is connected to the FPGA unit 11 while being directly connected to the ethernet port 14.
Fig. 3 is a structural diagram of the mechanical switching unit 1 in the GEPON optical repeater, in which the optical splitter switching motor 15 is a stepping motor, and the angular displacement is controlled by the microprocessor module 4 for switching the optical splitter into one-to-two optical splitters. The optical splitter switching connector 16 is fixed on a rotor of the optical splitter switching motor 15, each time the microprocessor module 4 sends a pulse signal to the optical splitter switching motor 15, the stepping motor drives the optical splitter switching connector 16 to switch one optical splitter, the one-to-two optical splitters are divided into five optical splitters according to the splitting ratio, namely 10:90 one-to-two optical splitters 17, 20:80 one-to-two optical splitters 18, 30:70 one-to-two optical splitters 19, 40:60 one-to-two optical splitters 20 and 50:50 one-to-two optical splitters 21, so as to meet the optical power requirements of different ONUs, and the mechanical switching unit 1 is used for switching different one-to-two optical splitters, so that the efficiency of the whole optical network is flexibly improved.
Fig. 4 is a cross-sectional view of the structure of the optical splitter switching connector and the interface, fig. 4 shows the switching of the optical splitter, the optical splitter further includes an optical splitter switching interface 22 for being clamped with the optical splitter switching connector 16, the optical splitter switching interface 22 is composed of a spring 28, a metal sheet 27 and a gasket 29, the spring 28 and the metal sheet 27 are used for sliding in and sliding out of the optical splitter switching connector 16, the spring 28 is located on both sides of the optical splitter switching interface 22, the metal sheet 27 traverses the entire optical splitter switching interface 22 from the middle part and is divided into an upper sheet and a lower sheet, wherein the metal sheet 27 at the optical splitter switching interface 22 is arc-shaped, and the spring 28 is located right above/below the metal sheet 27; the metal sheet 27 in the middle of the optical splitter switching interface 22 is arc-shaped, and the curvature radius of the metal sheet is the same as that of the optical splitter switching joint 16; the spacer 29 is used for fixing the middle part of the metal sheet 27, and the distance between the two spacers 29 is equal to the diameter of the optical splitter switch joint 16, and is used for fixing the optical splitter switch joint 16. The splitter switching interface 22 includes a limit key 25, the splitter switching sub 16 includes a key groove 26, and the limit key 25 and the key groove 26 are used for aligning the optical fiber section of the splitter switching interface 22 with the optical fiber section of the splitter switching sub 16. The optical splitter switching connector 16 slides to the middle of the optical splitter switching interface 22 from one side of the optical splitter switching interface 22 through the two metal sheets 27, at the moment, the spring 28 is compressed and deformed, the metal sheets 27 are elastically deformed, in the process that the optical splitter switching connector 16 slides into the center of the optical splitter switching interface 22, the spring 28 and the metal sheets 27 return to the original state, the restoring force enables the limit key 25 of the optical splitter switching interface 22 to be clamped into the key groove 26 of the optical splitter switching connector 16, at the moment, the optical fiber section 23 of the optical splitter switching interface is accurately butted with the optical fiber section 24 of the optical splitter switching connector, the low-loss butt joint of two optical fibers is realized, and the access loss of the optical fiber switching connector is lower than 0.15 dB. The optical splitter switching connector 16 slides out of the optical splitter switching interface 22 from the center of the optical splitter switching interface 22 through the two metal sheets 27, at this time, the spring 28 is compressed and deformed, the metal sheets 27 are elastically deformed, and in the process that the optical splitter switching connector 16 slides out of the center of the optical splitter switching interface 22, the spring 28 and the metal sheets 27 gradually return to the original state, so that the optical splitter switching connector 16 completes the whole process of sliding in/out of the optical splitter switching interface 22.
The GEPON optical repeater for the intelligent power grid further comprises a reset key and an indicator lamp 12, wherein the indicator lamp comprises an uplink indicator lamp and a downlink indicator lamp, the downlink indicator lamp is used for indicating that the optical repeater receives a downlink optical signal from the OLT and is mechanically fixed on the outer side of the front face of the optical repeater, and the downlink indicator lamp is a red LED lamp; the uplink indicator light is used for indicating that the optical repeater receives an uplink optical signal from the ONU, is mechanically fixed on the outer side of the front face of the optical repeater, and is a green LED lamp. The GEPON optical repeater is designed in an industrial clamping rail mode, the clamping rail is located at the rear portion of the equipment, the industrial design of the GEPON optical repeater can adapt to various severe environments, strong lightning stroke and strong electromagnetic interference can be resisted, and the whole intelligent power grid can operate safely and stably.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (9)
1. A GEPON optical repeater for a smart grid comprises a mechanical switching unit, a WDM unit, a circuit module, a microprocessor module and a power supply unit, and is characterized in that,
the mechanical switching unit comprises a plurality of one-to-two optical splitters, an optical splitter switching joint and an optical splitter switching motor, the mechanical switching unit is positioned between the WDM unit and the ONU, the optical splitter switching joint is fixed on a rotor of the optical splitter switching motor, the optical splitter switching motor is controlled by a microprocessor module, the optical splitter switching joint is clamped with the one-to-two optical splitters, and two branch optical fibers of the one-to-two optical splitters are connected with the ONU;
the WDM unit comprises a wavelength division multiplexer A and a wavelength division multiplexer B, the wavelength division multiplexer A is connected between the OLT and the circuit module through an optical fiber, and the wavelength division multiplexer B is connected between the circuit module and the mechanical switching unit through an optical fiber;
the mechanical switching unit comprises the following working steps:
s1: calculating the optical power requirement p of the ONU connected with the mechanical switching unit, wherein the calculation formula is
In the formula piFor the power demanded of the individual services in the network, AiIs the weight coefficient of the service, KiAttenuation of the ith section of optical fiber，LiIs the attenuation of the ith movable connector, Fi is the attenuation of the ith optical fiber fusion splice, McFor fiber redundancy, M is used when the transmission distance is less than 5kmcTaking value in the range of [1,2), when the transmission distance is more than 5km and less than 10km, McTaking value in the range of [2, 3), when the transmission distance is more than 10km, McTaking a value greater than 3;
s2: corresponding the calculation result of the optical power requirement p with the table, and selecting a one-to-two optical splitter which is suitable for the optical power requirement of the ONU;
s3: the microprocessor module controls the optical splitter to switch the motor, and the rotor drives the optical splitter switching joint to switch to the corresponding one-to-two optical splitter.
2. The GEPON optical repeater for the smart grid according to claim 1, wherein the circuit modules comprise an upstream signal regeneration circuit, a downstream signal regeneration circuit, a parallel-to-serial/serial-to-parallel conversion circuit and a DDM digital diagnosis circuit; the microprocessor module comprises an FPGA unit and an auxiliary CPU unit and is used for controlling the mechanical switching unit and the circuit module.
3. The GEPON optical repeater for the smart grid according to claim 1, wherein the splitter switching motor is a stepping motor, and the angular displacement is controlled by the microprocessor module for switching a two-split splitter.
4. The GEPON optical repeater for the smart grid according to claim 1 or 3, wherein the one-to-two optical splitter further comprises a splitter switching interface for being clamped with the splitter switching connector,
the switching interface of the optical splitter consists of a spring, a metal sheet and a gasket,
the spring and the metal sheet are used for sliding in and out of the optical splitter switching connector, the spring is positioned on two sides of the optical splitter switching interface, the metal sheet penetrates through the whole optical splitter switching interface from the middle part and is divided into an upper sheet and a lower sheet,
the metal sheet at the switching interface of the optical splitter is arc-shaped, and a spring is arranged right above/below the metal sheet;
the metal sheet in the middle of the switching interface of the optical splitter is arc-shaped, and the curvature radius of the metal sheet is the same as that of the switching interface of the optical splitter;
the gasket is used for fixing the middle part of the metal sheet, and the distance between the two gaskets is equal to the diameter of the optical splitter switching joint and used for fixing the optical splitter switching joint.
5. The GEPON optical repeater for the smart grid according to claim 4, wherein the splitter switching interface further comprises a limit key, the splitter switching sub comprises a key groove, and the limit key and the key groove are used for alignment of the optical fiber section of the splitter switching interface and the optical fiber section of the splitter switching sub.
6. The GEPON optical repeater for the smart grid according to claim 4, wherein the one-to-two optical splitters have splitting ratio types of 10:90, 20:80, 30:70, 40:60 and 50:50, the one-to-two optical splitters are sequentially arranged in a ring shape from top to bottom to meet optical power requirements of different ONUs, and the microprocessor module controls the step motor to work as follows:
s1: the microprocessor module controls the reset of the stepping motor, and the reset position is a 10:90 one-to-two optical splitter;
s2: obtaining a gear n corresponding to the one-to-two optical splitter according to the result of calculating the optical power requirement p, wherein the gear n corresponds to 0, 1,2, 3, 4 and 5 in the sequence of the 10:90, 20:80, 30:70, 40:60 and 50:50 one-to-two optical splitters;
s3: the microprocessor module sends high levels to the stepping motor according to the gear number, and n gears send n high levels;
s4: the stepping motor receives a high level and moves one-to-two optical splitter in sequence, and the stepping motor receives n high levels and moves the high levels to the corresponding one-to-two optical splitter.
7. The GEPON optical repeater for the smart grid according to claim 2, wherein the upstream signal regeneration circuit comprises an upstream receiving and amplifying unit and an upstream transmitting unit, and is used for re-amplifying, re-shaping and re-timing the upstream signals, and is electrically connected with the FPGA unit through a parallel-to-serial/serial-to-parallel conversion circuit and a DDM digital diagnosis circuit.
8. The GEPON optical repeater for the smart grid according to claim 2, wherein the downstream signal regeneration circuit comprises a downstream receiving and amplifying unit and a downstream transmitting unit, and is used for re-amplifying, re-shaping and re-timing the downstream signal, and is electrically connected with the FPGA unit through a parallel-to-serial/serial-to-parallel conversion circuit.
9. The GEPON optical repeater for the smart grid according to claim 1, further comprising a reset button and indicator lights, wherein the indicator lights comprise an uplink indicator light and a downlink indicator light,
the downlink indicator light is used for indicating that the optical repeater receives a downlink optical signal from the OLT, is mechanically fixed on the outer side of the front face of the optical repeater, and is a red LED lamp;
the uplink indicator light is used for indicating that the optical repeater receives an uplink optical signal from the ONU, is mechanically fixed on the outer side of the front face of the optical repeater, and is a green LED lamp.
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| WO2008005872A2 (en) * | 2006-06-30 | 2008-01-10 | Applied Materials, Inc. | Method and apparatus for demultiplexing optical signals in a passive optical network |
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|---|---|---|---|---|
| CN102590953A (en) * | 2011-09-13 | 2012-07-18 | 博创科技股份有限公司 | Wavelength-selective optical switch |
| CN104954073A (en) * | 2014-04-04 | 2015-09-30 | 贵州电网公司六盘水供电局 | Built-in-ONU-contained GEPON optical relay device |
| CN207150599U (en) * | 2017-07-13 | 2018-03-27 | 国网浙江海盐县供电公司 | A kind of GEPON optical repeaters for intelligent grid |
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| CN107707307A (en) | 2018-02-16 |
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