CN113965273A - Laser energy supply method and system of energy-communication common transmission optical fiber - Google Patents
Laser energy supply method and system of energy-communication common transmission optical fiber Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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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
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/806—Arrangements for feeding power
- H04B10/807—Optical power feeding, i.e. transmitting power using an optical signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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Abstract
The invention provides a laser energy supply method and a system of an energy communication common transmission optical fiber, wherein the method comprises the steps of setting optical fibers on a transformer substation side, a pole tower side and between the transformer substation side and the pole tower side into a common fiber of a laser energy signal and an information communication signal; connecting a super capacitor and a node sensor in parallel with a photocell, wherein the node sensor and a tower side optical communication module are electrically connected to a node central processing chip; transmitting the laser energy signal and the information communication signal which are divided by the optical splitter to a wavelength division multiplexer through an optical fiber; the wavelength division multiplexer distinguishes laser energy signals and information communication signals and respectively transmits the laser energy signals and the information communication signals to the photocell and the tower side optical communication module; the photocell converts the light energy of the laser energy signal into electric energy which is input to the super capacitor. Through this application, solve the problem that the energy of transmission for the power consumption side does not satisfy the power consumption demand of power consumption side in the current optic fibre letter passes in the company.
Description
Technical Field
The invention belongs to the technical field of power cables, and particularly relates to a laser energy supply method and a laser energy supply system for a communication common transmission optical fiber.
Background
An information acquisition and information transmission technology based on an electronic technology is a main technical means of a current internet of things terminal layer; the optical fiber communication system has the advantages of low unit loss, long transmission distance, strong anti-electromagnetic interference capability, simple laying and networking, safe and reliable communication data and the like, can meet the requirement of remote communication in a complex electromagnetic environment to a greater extent, and is suitable for monitoring application in various environments. However, due to the limitation of factors such as energy supply, a series of inconveniences are caused by the common energy supply problem of the electronic terminal in special environments such as overhead transmission lines and underground pipe galleries, potential safety risks exist, the operation of a monitoring system can be influenced, and the safe and effective operation of a power grid system is further damaged. Monitoring and control far-end node side energy supply mode mainly includes among the current electric power thing networking: 1) power line remote energy transmission, 2) local energy collection such as solar cell panel and electromagnetic induction. The power line remote energy transmission is difficult to apply in the long-distance environments such as overhead and underground pipe gallery due to the defects of difficult construction and the like; the solar cell panel has strict requirements on natural environment, meteorological conditions and the like, especially energy supply cannot be realized in rainy, icy and snowy severe weather, and electromagnetic induction type energy supply modes such as magnetic resonance have the defects of limited power supply distance, short-circuit discharge in high-voltage electricity taking and the like. Therefore, monitoring and controlling the effective energy supply at the remote node side in the power internet of things is an important technical problem.
In recent years, as shown in fig. 1, an optical fiber has been developed to transmit energy from a step-index distribution fiber to a complex-index distribution fiber, from pure light transmission to sensing of various physical quantities, as an important branch of modern optics. The optical fiber energy transmission technology can realize the optical fiber supply of the far-end node of the optical communication network, realize the common transmission of energy and information, effectively meet the requirement of quick layout of the communication network in the field complex environment, and have important application value.
The optical fiber energy transmission technology is a photoelectric conversion process for directly converting optical energy into electric energy through a photovoltaic effect, and aims to convert laser energy transmitted from a far end into electric energy as much as possible and output the electric energy to a sensor terminal for use. Due to the development of power system automation and smart grids, real-time monitoring of medium-high voltage transmission lines and power equipment becomes more and more important, and the application of intelligent electronic equipment and monitoring sensors in power transmission equipment is increasingly wide. In order to accurately monitor various physical quantities of electrical equipment, a large number of sensor nodes of various types are densely distributed in an area to be measured. Based on the specific practice that different types of sensors have obvious difference in power consumption, the sensors can reduce the power consumption by adjusting the sampling rate and the sleep mode according to the application needs and the perception phenomenon. The power consumption for processing data at this time includes power consumption due to transistor switching and energy loss due to leakage current. Thus, different sensor types collect and process data of different sizes and types, so that different nodes have different rates of energy loss and different energy demands, and the same energy is used for different times by different sensors.
In 2001, the conversion efficiency of the cell was measured to be 50.2% by the freundhoff solar research institute of germany by irradiating the GaAs photovoltaic cell with a light source having a wavelength of 810 nm. In 2008, a paper is published by the agency, which indicates that the GaAs photovoltaic cell has high conversion efficiency in the 790-850 nm band, and can output 1W of electric power, but has a limited signal transmission distance of 100-1000 m. If the common-fiber transmission requirements of long-distance energy supply of more than 5 kilometers and long-distance communication of more than 5 kilometers are met, although the output energy of the light source energy supply using the 810 nanometer center wavelength is high, the transmission loss is larger along with the longer transmission distance, so that the light source energy supply scheme using the 810 nanometer center wavelength is not suitable for the energy supply requirements of the transmission distance exceeding the kilometer magnitude.
Therefore, no effective solution is provided for solving the problem that the common fiber transmission requirements of the existing fiber communication process for long-distance energy supply of more than 5 kilometers and long-distance communication of more than 5 kilometers are difficult to meet.
Disclosure of Invention
In order to solve the technical problems, the invention provides a laser energy supply method and a system thereof of an optical fiber capable of communicating and transmitting together.
In a first aspect, an embodiment of the present invention provides a laser energy supply method for an optical fiber capable of communicating with both a power supply and a power supply, which is applied to a laser energy supply system for an optical fiber capable of communicating with both a power supply and a power supply, the system includes a substation side and a tower side, the substation side is provided with a laser light source, the tower side is provided with an optical splitter connected to the laser light source, and a plurality of sensor nodes, and the sensor nodes are provided with a wavelength division multiplexer connected to the optical splitter, a photocell, an optical communication module at the tower side, and a node central processing chip; the method comprises the following steps:
setting optical fibers on the transformer station side, the pole tower side and between the transformer station side and the pole tower side to be common fibers of a laser energy signal and an information communication signal, wherein the energy light center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information light center wavelength of the information communication signal;
connecting a super capacitor and a node sensor in parallel with the photocell, wherein the node sensor and the tower side optical communication module are electrically connected to the node central processing chip;
transmitting the laser energy signal and the information communication signal divided by the optical splitter to the wavelength division multiplexer through an optical fiber;
the wavelength division multiplexer distinguishes laser energy signals and information communication signals and transmits the laser energy signals and the information communication signals to the photocell and the tower side optical communication module respectively;
converting the light energy of the laser energy signal into electric energy by the photocell and inputting the electric energy into the super capacitor;
intermittently supplying power to the sensor node by the super capacitor.
Preferably, the method further comprises:
the photocell converts the laser energy signal in the optical fiber into electric energy and outputs the electric energy to the super capacitor, when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, the electric energy converted by the photocell is transmitted to and stored in the super capacitor, the node sensor wakes up the node central processing chip to monitor the voltage at two ends of the super capacitor pin at preset time intervals in a low power consumption mode, when the voltage at two ends of the super capacitor is monitored to reach a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously acquires energy from the super capacitor and the photocell, and after the operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
Preferably, a plurality of micro watt power consumption sensors and/or milliwatt power consumption sensors are mounted on each sensor node.
Preferably, one or more sensors of a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor and a wind speed sensor are installed at each sensor node.
Preferably, each sensor node is provided with one or more sensors selected from a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, a wind speed sensor, a camera and an image sensor.
Preferably, the photovoltaic cell is made of InP material which is lattice-matched with InGaAs; wherein the InP material is completely transparent to the laser with the energy light center wavelength of more than 1400 nanometers.
In a second aspect, an embodiment of the present invention provides a laser energy supply system capable of communicating with a common transmission optical fiber, where the system includes a substation side and a tower side, the substation side is provided with a laser light source, the tower side is provided with an optical splitter connected to the laser light source, and a plurality of sensor nodes, and each sensor node is provided with a wavelength division multiplexer connected to the optical splitter, a photocell, a tower side optical communication module, and a node central processing chip; the optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side are arranged to be shared by a laser energy signal and an information communication signal, the energy light center wavelength of the laser energy signal is more than 1400 nanometers and larger than the information light center wavelength of the information communication signal, the super capacitor and the node sensor are connected with the photocell in parallel, and the node sensor and the pole tower side optical communication module are electrically connected onto the node central processing chip.
Preferably, the sensing signal is obtained at the sensor node by analyzing data processing in an optical fiber.
Preferably, the photovoltaic cell is made of InP material which is lattice-matched with InGaAs; wherein the InP material is completely transparent to the laser with the energy light center wavelength of more than 1400 nanometers.
Preferably, each sensor node is provided with one or more sensors selected from a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, a wind speed sensor, a camera and an image sensor.
The laser energy supply method and the system for the optical fiber capable of communicating and transmitting together provided by the embodiment of the invention have at least the following technical effects:
the optical energy and signals synchronously transmitted by the transformer substation side are distributed to different sensor nodes through an optical splitter as required, the sensor nodes split the received optical energy and the signals through a wavelength division multiplexer, the split optical energy is stored in a photoelectric cell, and the optical energy stored in the photoelectric cell is converted into electric energy through a photoelectric conversion technology and stored in a super capacitor; through the combination of the optical fiber, the photocell, the super capacitor and the node sensor, the energy transmitted from the storage substation side is intermittently charged through the super capacitor, and the power supply requirement of common fiber transmission of long-distance energy supply of more than 5 kilometers and long-distance communication of more than 5 kilometers is met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a prior art optical fiber configuration;
fig. 2 is a structural block diagram of a laser power supply system capable of communicating with a common transmission fiber according to an embodiment of the present invention;
fig. 3 is a flowchart of a laser power supply method for an optical fiber capable of communicating with a common channel according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a charging and discharging local operation of a super capacitor according to an embodiment of the present invention;
fig. 5 is a structural block diagram of a laser power supply system capable of communicating with a common transmission fiber according to a second embodiment of the present invention;
fig. 6 is a structural block diagram of a laser power supply system capable of communicating with a common transmission fiber according to a third embodiment of the present invention;
fig. 7 is a structural block diagram of a laser power supply system capable of communicating with a common transmission fiber according to a fourth embodiment of the present invention;
fig. 8 is a flowchart of a laser power supply method for a trusted common fiber according to a fourth embodiment of the present invention;
fig. 9 is a structural block diagram of a laser power supply system capable of communicating with a common transmission fiber according to a fifth embodiment of the present invention;
fig. 10 is a flowchart of a laser power supply method for an optical fiber capable of communicating with a common channel according to a fifth embodiment of the present invention.
Description of reference numerals:
10-substation side, 11-laser light source;
the system comprises a 20-pole tower side, a 21-junction box, a 211-optical splitter, a 22-sensor node, a 221-wavelength division multiplexer, a 222-photocell, a 223-super capacitor, a 224-pole side optical communication module, a 225-node sensor and a 226-node central processing chip.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example one
The laser energy supply method of the information-sharing optical fiber provided by the embodiment is applied to a laser energy supply system of the information-sharing optical fiber. As shown in fig. 2, the laser energy supply system of the optical fiber for communication and common transmission comprises a substation side 10 and a tower side 20. The transformer station side 10 is provided with a laser light source 11, and the pole tower side 20 is provided with a light splitter 211 connected with the laser light source 11 through optical fibers and a plurality of sensor nodes 22. Specifically, the optical splitter 211 is disposed in the junction box 21, and the laser energy signal and the information communication signal transmitted from the substation side 10 are distributed to the plurality of sensor nodes 22 through the optical splitter 211 as needed.
Further, each sensor node 22 is provided with a wavelength division multiplexer 221, a photocell 222, a super capacitor 223, a tower-side optical communication module 224, a node sensor 225 and a node central processing chip 226. The wavelength division multiplexer 221 is in optical fiber connection with the optical splitter 211, the wavelength division multiplexer 221 is in optical fiber connection with the photocell 222 and the tower-side optical communication module 224 respectively, the photocell 222 is connected in parallel with the super capacitor 223 and the node sensor 225, and the node sensor 225 and the tower-side optical communication module 224 are electrically connected to a node central processing chip 226;
wherein, the node sensor 225 is a micro watt level power consumption sensor. Specifically, the micro watt level power consumption sensor comprises a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor and a wind speed sensor. In this embodiment, each of the sensor nodes 22 is provided with a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, and a wind speed sensor. It should be noted that in some other embodiments, one or more of a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor and a wind speed sensor are installed at each of the sensor nodes.
As shown in fig. 3, in the laser energy supply method of the optical fiber for common transmission of energy and information provided by this embodiment, since the optical fibers on the substation side, the tower side, and the position between the substation side and the tower side are configured to be the optical fiber for common transmission of the laser energy signal and the information communication signal, the optical fiber for common transmission of energy and information, the photovoltaic cell, and the super capacitor are configured and combined to effectively convert the laser light source via the photovoltaic cell, and obtain the electric power meeting the power demand of the power utilization side. Based on this, the invention is mainly suitable for the energy light center wavelength of the laser energy signal in the optical fiber is more than 1400 nanometers and is more than the information light center wavelength of the information communication signal in the optical fiber, and the laser energy supply method of the energy and information common transmission optical fiber specifically comprises the following steps:
s101, arranging optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side into a common optical fiber of a laser energy signal and an information communication signal, wherein the energy optical center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information optical center wavelength of the information communication signal;
in some embodiments of the present invention, the energy optical center wavelength of the laser energy signal in the optical fiber is 1400-1410 nm, 1410-1420 nm, 1420-1430 nm, 1440-1450 nm, 1450-1460 nm, 1460-1470 nm, 1470-1480 nm, 1490-1500 nm, 1510-1520 nm, 1530-1540 nm, 1550-1560 nm, 1560-1570 nm, 1570-1580 nm, 1580-1590 nm, 1590-1600 nm, 1610-1620 nm, 1620-1630 nm, 1630-1640 nm, 1640-1650 nm, 1650-1660 nm, 1660-1670 nm, 1670-1680 nm, 1680-1690 nm, 16890-1700 nm, etc., and the energy optical center wavelength of the laser energy signal in the optical fiber is set to match the nominal amount of the photocell and the supercapacitor.
In a preferred embodiment of the present invention, it is required to satisfy the common fiber transmission requirement of 5 km long-distance power supply and 5 km long-distance communication, for example, although the output energy is high when the light source with the 810 nm center wavelength is used for power supply, the transmission loss is larger as the transmission distance is longer, so that the scheme is not suitable for the power supply requirement with the transmission distance exceeding the km order. Meanwhile, the light source of 810 nm band as the energy supply source of the project cannot meet the requirement of energy and information transmission in one optical fiber, and an additional optical fiber is needed to be used as a communication optical fiber, because the energy transmission optical fiber for transmitting light of 810 nm band is a special multi-core optical fiber.
And adopt in this patent application the transformer substation side the pole tower side and the transformer substation side with optic fibre between the pole tower side sets to laser energy signal and the information communication signal single optic fibre of fine altogether, just the energy light center wavelength of laser energy signal is more than 1400 nanometers and is greater than information communication signal's information light center wavelength, and with photocell, super capacitor combine together, can realize 5 kilometers remote energy supply and 5 kilometers remote communication's fine transmission demand altogether to satisfy the power consumption demand of each sensor node of shaft tower side.
In a preferred embodiment of the present invention, in order to be more suitable for transmitting energy over a long distance of 5 km or more, the energy optical center wavelength of the laser energy signal is preferably 1450 nm, and the information optical center wavelength of the information communication signal is preferably 1310 nm, which can satisfy both energy transmission and information transmission in an optical fiber, so that when the length of the power cable of the optical fiber is 5 km or more, the output electric power obtained through testing can satisfy the power consumption requirement of the power consumption side, that is, the power consumption requirement at a plurality of sensor nodes, according to the matching arrangement of the optical fiber, the photocell, and the super capacitor.
And S102, connecting the super capacitor and the node sensor in parallel with the photocell, wherein the node sensor and the tower side optical communication module are electrically connected to the node central processing chip.
And S103, transmitting the laser energy signal and the information communication signal which are divided by the optical splitter to the wavelength division multiplexer through an optical fiber.
And S104, distinguishing laser energy signals and information communication signals by the wavelength division multiplexer, and respectively transmitting the laser energy signals and the information communication signals to the photocell and the tower side optical communication module.
And S105, converting the light energy of the laser energy signal into electric energy by the photocell, and inputting the electric energy into the super capacitor.
And S106, intermittently supplying power to the sensor node by the super capacitor.
Wherein, the photocell converts the laser energy signal in the optical fiber into electric energy and outputs the electric energy to the super capacitor, when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, the electric energy converted by the photocell is transmitted to and stored in the super capacitor, the node sensor wakes up the node central processing chip to monitor the voltage at two ends of the super capacitor pin at preset time intervals in a low power consumption mode, when the voltage at two ends of the super capacitor is monitored to reach a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously acquires energy from the super capacitor and the photocell, and after the operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
Further, the partial operation circuit diagram of charging and discharging the super capacitor 223 is shown in fig. 4. The charging and discharging processes of the super capacitor 223 are as follows: the photocell 222, the super capacitor 223 and the node sensor 225 are connected in parallel, and the photocell 222 at the P1 converts energy light with the central wavelength of 1450 nm into electric energy to be output to the super capacitor 223 and the node sensor 225. When the super capacitor 223 is in a charging state, the node sensor 225 connected in parallel with the super capacitor 223 is in a low power consumption mode, in the low power consumption mode, the overall resistance of the node sensor 225 reaches the megaohm level, and only microampere current is needed to maintain the low power consumption mode, so most energy of the photocell 222 is transmitted and stored into the super capacitor 223. Meanwhile, the node sensor 225 wakes up the system at regular intervals to monitor the voltage at the two ends of the pin of the super capacitor 223 in the low power consumption mode, and when the node sensor 225 determines that the voltage at the two ends of the super capacitor 223 reaches the discharge threshold, the super capacitor 223 starts to discharge. When the super capacitor 223 is in a discharging state, the node sensor 225 is in an operating mode at this time, the overall resistance of the node sensor 225 is no longer maintained at a megaohm level, and may fluctuate at a hundred ohm level and a kiloohm level, and a microampere level current does not meet the normal stable operation requirement of the node sensor 225, the node sensor 225 may simultaneously acquire energy from the super capacitor 223 and the photocell 222, wherein the energy provided by the super capacitor 223 accounts for a major part, and after the overall operating mode is completed, the node sensor 225 enters a low power consumption mode again, and the super capacitor 223 starts to charge.
In some embodiments, the photocell is made of an InP material lattice-matched with InGaAs, and the InP material is fully transparent to laser with the energy light center wavelength above 1400 nm, so that the combination of the optical fiber, the photocell and the super capacitor can meet the power consumption requirement of the power side of the optical fiber capable of signaling co-transmission. When the energy optical center wavelength of the laser energy signal in the optical fiber is 1450 nm and the information optical center wavelength of the information communication signal is 1310 nm, the laser energy signal with the wavelength of 1450 nm and the information communication signal with the wavelength of 1310 nm in the same optical fiber cable can present a complex nonlinear light refraction phenomenon, and based on the configuration and combination of the optical fiber, the photocell and the super capacitor, when the length of the power optical cable of the optical fiber is 5 kilometers, the output electric power obtained through testing can meet the power utilization requirement of a power utilization side, namely the power utilization requirement of a plurality of sensor nodes.
Through the steps, the optical splitter distributes optical energy and signals synchronously transmitted by the transformer substation side to different sensor nodes according to requirements, the sensor nodes split the received optical energy and the signals through a wavelength division multiplexer, the split optical energy is stored in a photocell, and the optical energy stored in the photocell is converted into electric energy through a photoelectric conversion technology and stored in a super capacitor; through the combination of the optical fiber, the photocell, the super capacitor and the node sensor, the super capacitor for storing the energy transmitted by the transformer substation side is charged intermittently, and the technical problem that the energy transmitted to the power utilization side in the existing optical fiber information transmission process is not enough to meet the power utilization requirement of the power utilization side is solved.
Example two
The laser energy supply method of the information-sharing optical fiber provided by the embodiment is applied to a laser energy supply system of the information-sharing optical fiber. As shown in fig. 5, the laser energy supply system of the optical fiber for communication and common transmission comprises a substation side 10 and a tower side 20. The transformer station side 10 is provided with a laser light source 11, and the pole tower side 20 is provided with a light splitter 211 connected with the laser light source 11 through optical fibers and a plurality of sensor nodes 22. Specifically, the optical splitter 211 is disposed in the junction box 21, and the laser energy signal and the information communication signal transmitted from the substation side 10 are distributed to the plurality of sensor nodes 22 through the optical splitter 211 as needed.
Further, each sensor node 22 is provided with a wavelength division multiplexer 221, a photocell 222, a super capacitor 223, a tower-side optical communication module 224, a node sensor 225 and a node central processing chip 226. The wavelength division multiplexer 221 is in optical fiber connection with the optical splitter 211, the wavelength division multiplexer 221 is in optical fiber connection with the photocell 222 and the tower-side optical communication module 224 respectively, the photocell 222 is connected in parallel with the super capacitor 223 and the node sensor 225, and the node sensor 225 and the tower-side optical communication module 224 are electrically connected to a node central processing chip 226;
wherein the node sensor 225 is a milliwatt power consumption sensor. Specifically, the milliwatt-level power consumption sensor comprises a camera and an image sensor. In this embodiment, each sensor node is provided with a camera and an image sensor. In other embodiments, one or more sensors of a camera and an image sensor are installed in each sensor node.
In the embodiment of the present invention, the node sensor 225 is an electronic sensor, and the sensing information is obtained by analyzing and processing the sensing data of the electronic node sensor 225 obtained by the node central processing chip 226.
In this embodiment, a laser power supply method using an electronic node sensor and a fiber for common transmission of information of a node central processing chip 226 is provided, which specifically includes the following steps:
s201, setting optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side to be shared by a laser energy signal and an information communication signal, wherein the energy light center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information light center wavelength of the information communication signal;
wherein, in order to be better suitable for transmitting energy in a long distance, the energy light center wavelength of the laser energy signal is preferably 1450 nm, and the information light center wavelength of the information communication signal is preferably 1310 nm.
S202, the super capacitor and the node sensor are connected in parallel with the photocell, and the node sensor and the tower side optical communication module are electrically connected onto the node central processing chip.
And S203, transmitting the laser energy signal and the information communication signal which are divided by the optical splitter to the wavelength division multiplexer through an optical fiber.
And S204, distinguishing laser energy signals and information communication signals by the wavelength division multiplexer, and respectively transmitting the laser energy signals and the information communication signals to the photocell and the tower-side optical communication module.
S205, converting the light energy of the laser energy signal into electric energy by the photocell, and inputting the electric energy into the super capacitor.
And S206, intermittently supplying power to the sensor node by the super capacitor.
Wherein, the photocell converts the laser energy signal in the optical fiber into electric energy and outputs the electric energy to the super capacitor, when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, the electric energy converted by the photocell is transmitted to and stored in the super capacitor, the node sensor wakes up the node central processing chip to monitor the voltage at two ends of the super capacitor pin at preset time intervals in a low power consumption mode, when the voltage at two ends of the super capacitor is monitored to reach a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously acquires energy from the super capacitor and the photocell, and after the whole operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
EXAMPLE III
The laser energy supply method of the information-sharing optical fiber provided by the embodiment is applied to a laser energy supply system of the information-sharing optical fiber. As shown in fig. 6, the laser energy supply system of the optical fiber for communication and common transmission comprises a substation side 10 and a tower side 20. The transformer station side 10 is provided with a laser light source 11, and the pole tower side 20 is provided with a light splitter 211 connected with the laser light source 11 through optical fibers and a plurality of sensor nodes 22. Specifically, the optical splitter 211 is disposed in the junction box 21, and the laser energy signal and the information communication signal transmitted from the substation side 10 are distributed to the plurality of sensor nodes 22 through the optical splitter 211 as needed.
Further, each sensor node 22 is provided with a wavelength division multiplexer 221, a photocell 222, a super capacitor 223, a tower-side optical communication module 224, a node sensor 225 and a node central processing chip 226. The wavelength division multiplexer 221 is in optical fiber connection with the optical splitter 211, the wavelength division multiplexer 221 is in optical fiber connection with the photocell 222 and the tower-side optical communication module 224 respectively, the photocell 222 is connected in parallel with the super capacitor 223 and the node sensor 225, and the node sensor 225 and the tower-side optical communication module 224 are electrically connected to a node central processing chip 226;
wherein, the node sensor 225 is a mixture of micro watt power consumption sensor and milliwatt power consumption sensor. Specifically, the micro watt level power consumption sensor comprises a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor and a wind speed sensor; the milliwatt level power consumption sensor comprises a camera and an image sensor. In this embodiment, each of the sensor nodes 22 is provided with a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, a wind speed sensor, a camera, and an image sensor. In other embodiments, one or more of a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, a wind speed sensor, a camera, and an image sensor are installed in each sensor node.
In the embodiment of the present invention, the node sensor 225 is an electronic sensor, and the sensing information is obtained by analyzing and processing the sensing data of the electronic node sensor obtained by the node central processing chip 226.
In the present embodiment, the method of using an electronic node sensor and a node central processing chip 226 specifically includes the following steps:
s301, setting optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side to be shared by a laser energy signal and an information communication signal, wherein the energy light center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information light center wavelength of the information communication signal;
wherein, in order to be better suitable for transmitting energy in a long distance, the energy light center wavelength of the laser energy signal is preferably 1450 nm, and the information light center wavelength of the information communication signal is preferably 1310 nm.
And S302, connecting the super capacitor and the node sensor in parallel with the photocell, wherein the node sensor and the tower side optical communication module are electrically connected to the node central processing chip.
And S303, transmitting the laser energy signal and the information communication signal which are divided by the optical splitter to the wavelength division multiplexer through an optical fiber.
And S304, the wavelength division multiplexer distinguishes laser energy signals and information communication signals and transmits the laser energy signals and the information communication signals to the photocell and the tower side optical communication module respectively.
S305, converting the light energy of the laser energy signal into electric energy by the photocell, and inputting the electric energy into the super capacitor.
S306, intermittently supplying power to the sensor node by the super capacitor;
wherein, the photocell converts the laser energy signal in the optical fiber into electric energy and outputs the electric energy to the super capacitor, when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, the electric energy converted by the photocell is transmitted to and stored in the super capacitor, the node sensor wakes up the node central processing chip to monitor the voltage at two ends of the super capacitor pin at preset time intervals in a low power consumption mode, when the voltage at two ends of the super capacitor is monitored to reach a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously acquires energy from the super capacitor and the photocell, and after the whole operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
Example four
The laser energy supply method of the information-sharing optical fiber provided by the embodiment is applied to a laser energy supply system of the information-sharing optical fiber. As shown in fig. 7, the laser energy supply system of the optical fiber for communication and common transmission comprises a substation side 10 and a tower side 20. The transformer station side 10 is provided with a laser light source 11, and the pole tower side 20 is provided with a light splitter 211 connected with the laser light source 11 through optical fibers and a plurality of sensor nodes 22. Specifically, the optical splitter 211 is disposed in the junction box 21, and the laser energy signal and the information communication signal transmitted from the substation side 10 are distributed to the plurality of sensor nodes 22 through the optical splitter 211 as needed.
Further, each sensor node 22 is provided with a wavelength division multiplexer 221, a photocell 222, a super capacitor 223, a tower-side optical communication module 224 and a node sensor 225. The wavelength division multiplexer 221 is connected to the optical splitter 211 through an optical fiber, the wavelength division multiplexer 221 is respectively connected to the photocell 222 and the tower-side optical communication module 224 through optical fibers, and the photocell 222 is connected to the super capacitor 223 and the node sensor 225 in parallel.
In this embodiment, in the laser energy supply system capable of communicating optical fiber in common, under a cloud computing service architecture, the node sensor 225 is a virtual node sensor, that is, the virtual node sensor is a non-electronic sensor, such as an optical fiber sensor, that is, a sensing state is reflected by analyzing data processing in an optical fiber at the sensor node, and a unified node central processing chip is used in the junction box on the tower side 20 to process data at a plurality of sensor nodes, that is, to obtain sensing signals of the virtual node sensors at the respective sensor nodes.
Based on a system architecture that uses a unified node central processing chip in a junction box on a tower side 20 as shown in fig. 7 and uses virtual node sensors at each sensor node, as shown in fig. 8, the present embodiment provides a laser energy supply method for a common transmission fiber, which specifically includes the following steps:
s401, arranging optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side into a common optical fiber of a laser energy signal and an information communication signal, wherein the energy optical center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information optical center wavelength of the information communication signal;
s402, connecting the super capacitor with the photocell in parallel;
s403, transmitting the laser energy signal and the information communication signal which are divided by the optical splitter to a wavelength division multiplexer through an optical fiber;
s404, the wavelength division multiplexer distinguishes a laser energy signal and an information communication signal and transmits the laser energy signal and the information communication signal to the photocell and the optical communication module respectively;
s405, converting light energy of the laser energy signal into electric energy by the photocell, and inputting the electric energy into the super capacitor;
s406, intermittently supplying power to the sensor node by the super capacitor;
when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, and the electric energy converted by the photocell is transmitted and stored into the super capacitor; when the voltage at two ends of the super capacitor reaches a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously obtains energy from the super capacitor and the photocell, and when the operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
In some embodiments, the photocell is made of an InP material lattice-matched with InGaAs, and the InP material is fully transparent to laser with the energy light center wavelength above 1400 nm, so that the combination of the optical fiber, the photocell and the super capacitor can meet the power consumption requirement of the power side of the optical fiber capable of signaling co-transmission. When the energy optical center wavelength of the laser energy signal in the optical fiber is 1450 nm, and the information optical center wavelength of the information communication signal is 1310 nm, based on the configuration and combination of the optical fiber, the photocell and the super capacitor, when the length of the power optical cable of the optical fiber is 5 km, the output electric power obtained through testing can meet the power utilization requirement of a power utilization side, namely the power utilization requirement of a plurality of sensor nodes.
EXAMPLE five
The laser energy supply method of the information-sharing optical fiber provided by the embodiment is applied to a laser energy supply system of the information-sharing optical fiber. As shown in fig. 9, the laser energy supply system of the optical fiber for communication and common transmission comprises a substation side 10 and a tower side 20. The transformer substation side 10 is provided with a laser light source 11, the pole tower side 20 is provided with a junction box 21 connected with the laser light source 11 through an optical fiber, and a node sensor 225 connected with the junction box 21 through an optical fiber, and the junction box 21 is provided with a wavelength division multiplexer 221 connected with the laser light source 11 through an optical fiber, a photocell 222, a node central processing chip 226, and a light splitter 211.
Specifically, the optical splitter 211 is disposed in the junction box 21, and the laser energy signal and the information communication signal transmitted from the substation side 10 are distributed to the plurality of node sensors 225 as needed through the optical splitter 211.
Further, one end of the wavelength division multiplexer 221 in the junction box is in optical fiber connection with the laser light source 11 on the tower side 20, the other end of the wavelength division multiplexer is in optical fiber connection with the photocell 222 and the optical communication module on the tower side, and a super capacitor 223 and a node central processing chip 226 are connected in parallel with the photocell 222; the tower side optical communication module, the node central processing unit and the information acquisition and conversion unit are all arranged on the node central processing chip 226.
In the present embodiment, in the laser energy supply system capable of communicating optical fiber in common, under the cloud computing service architecture, the node sensor 225 is a virtual node sensor, that is, the virtual node sensor is a non-electronic sensor, such as an optical fiber sensor, that is, a sensing state is reflected by analyzing data processing in the optical fiber at the sensor node, and a unified node central processing chip 226 is used in the junction box on the tower side 20 to process data at a plurality of sensor nodes, that is, to obtain sensing signals of the virtual node sensors at the respective sensor nodes.
Based on a system architecture that uses a unified node central processing chip 226 in a junction box on the tower side 20 as shown in fig. 9 and uses virtual node sensors at each sensor node, as shown in fig. 10, the present embodiment provides a laser energy supply method capable of communicating a common transmission fiber, which specifically includes the following steps:
s501, arranging optical fibers on the transformer substation side, the pole tower side and between the transformer substation side and the pole tower side into a common optical fiber of a laser energy signal and an information communication signal, wherein the energy optical center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information optical center wavelength of the information communication signal;
s502, connecting a super capacitor and a node central processing chip in parallel with the photocell;
s503, transmitting the laser energy signal and the information communication signal at the transformer station side to a wavelength division multiplexer of the junction box through an optical fiber;
s504, the wavelength division multiplexer distinguishes the laser energy signal and the information communication signal and transmits the signals to the photocell and the node central processing chip respectively;
s505, the photocell converts light energy of the laser energy signal into electric energy, the electric energy is input to the super capacitor, and the electric energy is supplied to the node central processing chip and the sensor node through the super capacitor;
wherein when the supercapacitor is in a charging state, the sensor node in parallel with the supercapacitor is in a low power consumption mode, and the electrical energy converted by the photovoltaic cell is transmitted and stored into the supercapacitor; when the voltage at two ends of the super capacitor reaches a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the sensor node simultaneously acquires energy from the super capacitor and the photocell, and when the operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
In some embodiments, the photovoltaic cell is fabricated from an InP material lattice-matched to InGaAs that is fully transparent to laser light having the energy optical center wavelength above 1400 nm.
It should be noted that, in the above embodiments of the present invention, as shown in fig. 2, fig. 5, fig. 6, fig. 7, and fig. 9, the power cable between the substation side and the tower side is one or more optical fibers, each optical fiber is configured to be a common fiber of a laser energy signal and an information communication signal, and an energy light center wavelength of the laser energy signal is above 1400 nm and greater than an information light center wavelength of the information communication signal, so that the combination of the optical fiber, the photocell, and the super capacitor can meet the power consumption requirement of the power side of the signaling common fiber. When the energy optical center wavelength of the laser energy signal in the optical fiber is 1450 nm, and the information optical center wavelength of the information communication signal is 1310 nm, based on the configuration and combination of the optical fiber, the photocell and the super capacitor, when the length of the power optical cable of the optical fiber is 5 km, the output electric power obtained through testing can meet the power utilization requirement of a power utilization side, namely the power utilization requirement of a plurality of sensor nodes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a laser energy supply method of optical fiber is passed in letter altogether, is applied to the laser energy supply system of optical fiber is passed in letter altogether, the system includes transformer substation side, shaft tower side, the transformer substation side is equipped with laser light source, the shaft tower side be equipped with the optical splitter that laser light source optical fiber is connected and a plurality of sensor node, the sensor node be equipped with wavelength division multiplexer, photocell and shaft tower sidelight optical communication module that optical splitter optical fiber is connected to and node central processing chip, its characterized in that, the method includes:
setting optical fibers on the transformer station side, the pole tower side and between the transformer station side and the pole tower side to be common fibers of a laser energy signal and an information communication signal, wherein the energy light center wavelength of the laser energy signal is more than 1400 nanometers and is larger than the information light center wavelength of the information communication signal;
connecting a super capacitor and a node sensor in parallel with the photocell, wherein the node sensor and the tower side optical communication module are electrically connected to the node central processing chip;
transmitting the laser energy signal and the information communication signal divided by the optical splitter to the wavelength division multiplexer through an optical fiber;
the wavelength division multiplexer distinguishes laser energy signals and information communication signals and transmits the laser energy signals and the information communication signals to the photocell and the tower side optical communication module respectively;
converting the light energy of the laser energy signal into electric energy by the photocell and inputting the electric energy into the super capacitor;
intermittently supplying power to the sensor node by the super capacitor.
2. The method of claim 1, wherein the laser power is supplied by a laser powered common mode optical fiber, comprising: the method further comprises:
the photocell converts the laser energy signal in the optical fiber into electric energy and outputs the electric energy to the super capacitor, when the super capacitor is in a charging state, the node sensor connected with the super capacitor in parallel is in a low power consumption mode, the electric energy converted by the photocell is transmitted to and stored in the super capacitor, the node sensor wakes up the node central processing chip to monitor the voltage at two ends of the super capacitor pin at preset time intervals in a low power consumption mode, when the voltage at two ends of the super capacitor is monitored to reach a discharge threshold value, the super capacitor is in a discharge state, the sensor node is in an operation mode at the moment, the node sensor simultaneously acquires energy from the super capacitor and the photocell, and after the operation mode is finished, the sensor node is in a low power consumption mode, and the super capacitor starts to charge.
3. The laser power supply method of claim 1, wherein a plurality of micro-watt level power consumption sensors and/or milliwatt level power consumption sensors are installed at each sensor node.
4. The laser energy supply method of the optical fiber capable of communicating in common according to claim 1, wherein one or more sensors selected from a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor and an air speed sensor are installed at each sensor node.
5. The laser energy supply method of the optical fiber capable of communicating in common according to claim 1, wherein one or more sensors selected from a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, an air speed sensor, a camera and an image sensor are installed at each sensor node.
6. The method of claim 1, wherein the photovoltaic cell is fabricated from an InP material that is lattice matched to InGaAs; wherein the InP material is completely transparent to the laser with the energy light center wavelength of more than 1400 nanometers.
7. A laser energy supply system using the optical fiber for information communication according to claim 1, the system comprises a transformer station side, a tower side, the transformer station side is provided with a laser light source, the tower side is provided with an optical splitter connected with the laser light source, and a plurality of sensor nodes, the sensor nodes are provided with a wavelength division multiplexer connected with the optical fiber of the optical splitter, a photocell, an optical communication module at the tower side, and a central processing chip of the node, characterized in that the optical fibers at the transformer station side, the tower side, and between the transformer station side and the tower side are provided with an optical fiber for laser energy signal and information communication signal, and the optical center wavelength of the energy of the laser energy signal is above 1400 nm and larger than the optical center wavelength of the information communication signal, and a super capacitor and a node sensor are connected in parallel with the photocell, the node sensor and the tower side optical communication module are electrically connected to the node central processing chip.
8. The laser powered system of claim 7 in which the sensing signal is obtained at the sensor node by analysis of data processing in the optical fiber.
9. The laser powered system of claim 7 wherein the photovoltaic cell is fabricated from an InP material that is lattice matched to InGaAs; wherein the InP material is completely transparent to the laser with the energy light center wavelength of more than 1400 nanometers.
10. The laser energy supply system of claim 7, wherein one or more of a temperature sensor, a humidity sensor, an air pressure sensor, a light intensity sensor, an air velocity sensor, a camera and an image sensor are installed at each sensor node.
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| CN114567087A (en) * | 2022-01-28 | 2022-05-31 | 国网江西省电力有限公司信息通信分公司 | Laser energy supply method and system of energy-information common transmission optical fiber |
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| CN114567087A (en) * | 2022-01-28 | 2022-05-31 | 国网江西省电力有限公司信息通信分公司 | Laser energy supply method and system of energy-information common transmission optical fiber |
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| CN114567382A (en) * | 2022-02-23 | 2022-05-31 | 国网江西省电力有限公司信息通信分公司 | Optical fiber information common transmission optimization system |
| CN114531202B (en) * | 2022-02-23 | 2023-08-18 | 国网江西省电力有限公司信息通信分公司 | Optical fiber energy and information co-transmission optimizing system |
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| CN115002580A (en) * | 2022-08-04 | 2022-09-02 | 北京精诚恒创科技有限公司 | Intelligent water quantity monitoring system based on EPON system |
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