Optical fiber energy signal sensing multiplexing system and control method thereof

Abstract

The invention relates to the technical field of optical fiber application, and particularly provides an optical fiber energy signal sensing multiplexing system and a control method thereof, and the system comprises a local host composed of a sending part and a receiving part, and a far-end access node device connected with the local host through an optical fiber. The local host highly multiplexes core devices such as the laser, the modulator, the driving signal generator and the detector, the hardware cost is reduced, the size of the device is reduced, and three functions of optical fiber communication, energy transmission and distributed optical fiber sensing (including temperature and vibration sensing) can be realized only by changing the modulation mode of the light source through software. The time sequence control logic of the system is simple and flexible, and the energy, signal and sensing integrated technology is advanced to be practical.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber applications, and particularly to an optical fiber energy, communication, and sensing multiplexing system and its control method. Background Art

[0002] Optical fiber energy, communication, and sensing multiplexing can integrate multiple functions such as optical fiber communication, energy transmission, and optical fiber sensing. To achieve this goal, advanced technical means are usually required, such as wavelength division multiplexing (WDM), optical time division multiplexing (OTDM), etc. These technologies can multiplex optical signals of different wavelengths, optical pulses at different times, and different sensing signals onto the same optical fiber for transmission, thereby greatly improving the transmission efficiency and utilization rate of the optical fiber, reducing the amount of optical fiber used, and lowering the construction and operation and maintenance costs of the system. In addition, energy, communication, and sensing multiplexing inherits the advantages of strong anti-interference ability and long transmission distance of optical fiber communication, which can ensure the reliability and stability of power system communication. At the same time, optical fiber sensing can monitor the operating status of the power system in real time, detect and handle faults in a timely manner. Therefore, optical fiber energy, communication, and sensing multiplexing has broad application prospects and important strategic significance in new power systems. By adopting this technology, the transmission efficiency, reliability, and security of power systems can be further improved, laying a solid foundation for the intelligent development of power systems.

[0003] However, the optical fiber energy, communication, and sensing multiplexing technology faces many challenges in the actual development process. One of them is the excessively high cost (especially the host), because this technology needs to simultaneously realize three major functions: optical fiber communication, energy transmission, and optical fiber sensing. Each function has different requirements for device performance, modulation / demodulation methods, etc. At the same time, issues such as channel design and timing control also need to be considered. It is a very complex systematic project. Currently, an easily implementable method is to build independent hardware systems for the three major functions respectively and integrate them into the same chassis, and supplement them with software control to ensure the orderly operation of multiple functions. However, the cost of this method is significantly higher than the sum of the costs of three independently operating systems, and the advantages of device multiplexing and system integration cannot be exerted. Summary of the Invention

[0004] To overcome the above defects, the present invention proposes an optical fiber energy, communication, and sensing multiplexing system and its control method.

[0005] In a first aspect, an optical fiber energy, communication, and sensing multiplexing system is provided. The optical fiber energy, communication, and sensing multiplexing system includes:

[0006] A local host composed of a transmitting part and a receiving part, and a remote access node device connected to the local host through an optical fiber;

[0007] The transmitting part is used for combining the 1310nm band signal and the 1550nm band signal and sending them to the remote access node device through the optical fiber;

[0008] The receiving unit is configured to receive the communication feedback signal and the sensing backscattering signal of the remote access node device, and convert the two into electrical signals to achieve the function of fiber optic communication and sensing multiplexing;

[0009] The remote access node device is configured to load the acquisition signal of the sensor onto a 1310 nm band signal to obtain a communication feedback signal, and send the communication feedback signal to the receiving unit through an optical fiber.

[0010] Further, the transmitting unit includes: a narrow linewidth laser, a high-power laser, a transmitting end wavelength division multiplexer, a transmitting end optical circulator, a high-speed modulator, and a high-power modulator;

[0011] The narrow linewidth laser generates a pulsed optical sequence or a continuous optical carrier in a manner modulated by the high-speed modulator with a pulsed or DC signal; the high-power laser generates a pulsed optical sequence or a continuous power supply light in a manner modulated by the high-power modulator with a pulsed or DC signal; the transmitting end wavelength division multiplexer multiplexes the two optical signals output by the high-speed modulator and the high-power modulator and inputs them from port 1 of the transmitting end optical circulator, and outputs from port 2 to the optical fiber.

[0012] Further, the central wavelength of the narrow linewidth laser is located at 1310 nm, and the central wavelength of the high-power laser is located at 1550 nm.

[0013] Further, the receiving unit includes: a receiving end wavelength division multiplexer, a high-speed photodetector, and a dual-band energy detector;

[0014] The receiving end wavelength division multiplexer has three band interfaces, namely a 1310 nm band interface, a 1450 nm band interface, and a 1650 nm band interface. The 1310 nm band interface is used to receive the communication feedback signal of the remote access node device and the backward Rayleigh scattering signal generated by the 1310 nm band signal through port 3 of the transmitting end optical circulator. The 1450 nm band interface and the 1650 nm band interface are respectively used to receive the backward Raman scattering signals in the 1450 nm and 1650 nm bands generated by the 1550 nm band signal through port 3 of the transmitting end optical circulator;

[0015] The high-speed photodetector is configured to demodulate the signal received by the 1310 nm band interface;

[0016] The dual-band energy detector is configured to demodulate the backward Raman scattering signal in the 1450 nm band and the backward Raman scattering signal in the 1650 nm band respectively.

[0017] Further, the dual-band energy detector is composed of independent detectors with detection central wavelengths located at 1450 nm and 1650 nm respectively.

[0018] Furthermore, the remote access node device includes: a remote wavelength division multiplexer, a photovoltaic cell and an energy management unit, an integrated optical switch, a remote optical circulator, an electro-optic modulator, and an electronic sensor;

[0019] The remote wavelength division multiplexer is used to decouple the 1310 nm band signal and the 1550 nm band signal;

[0020] The photovoltaic cell and the energy management unit are used to convert the 1550 nm band power supply laser into electrical energy and provide this energy to the integrated optical switch, the electro-optic modulator, and the electronic sensor;

[0021] The integrated optical switch is used to switch the optical path to the vacant side when the input 1310 nm band signal is pulsed light, and switch the optical path to the remote optical circulator side when the input 1310 nm band signal is continuous light;

[0022] The continuous light is input through port 2 of the remote optical circulator and output through port 3 to the electro-optic modulator. The electro-optic modulator loads the sensor data collected by the electronic sensor onto the continuous light, and then inputs it through port 2 of the remote optical circulator and outputs it through port 1 to the local host.

[0023] Furthermore, the system includes a controller, which is specifically used to implement the following process through a preset program:

[0024] Initialize the local host system;

[0025] Turn on the high-power laser, apply a DC drive signal to the high-power modulator to make it output continuous light, turn on the narrow-linewidth laser, and apply a pulsed drive signal to the high-speed modulator to make it output pulsed light;

[0026] The backward Rayleigh scattering signal generated by the pulsed light output by the high-speed modulator enters the high-speed photodetector through the local optical circulator for demodulation;

[0027] After the remote access node device is fully charged, switch the drive signal of the high-power modulator to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting-end optical circulator for demodulation. Switch the drive signal of the high-speed modulator to a DC bias. The continuous optical carrier output by it enters the electro-optic modulator through the integrated optical switch. The electro-optic modulator loads the sensor data onto the continuous light and then returns it to the high-speed photodetector through the remote optical circulator for demodulation.

[0028] In a second aspect, a control method for a fiber optic energy, signal, and sensor multiplexing system is provided. The control method for the fiber optic energy, signal, and sensor multiplexing system includes:

[0029] Initialize the local host system;

[0030] The high-power laser is turned on, and a DC drive signal is applied to the high-power modulator to make it output continuous light. The narrow-linewidth laser is turned on, and a pulse drive signal is applied to the high-speed modulator to make it output pulsed light;

[0031] The backward Rayleigh scattering signal generated by the pulsed light output by the high-speed modulator enters the high-speed photodetector through the local optical circulator for demodulation;

[0032] After the charging of the remote access node device is completed, the drive signal of the high-power modulator is switched to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting-end optical circulator for demodulation. The drive signal of the high-speed modulator is switched to a DC bias. The continuous optical carrier output by it enters the electro-optic modulator through the integrated optical switch. The electro-optic modulator loads the sensor data onto the continuous light and then returns it to the high-speed photodetector through the remote optical circulator for demodulation.

[0033] In a third aspect, a computer device is provided, including: one or more processors;

[0034] The processor is used to execute one or more programs;

[0035] When the one or more programs are executed by the one or more processors, the control method of the optical fiber energy-communication-sensing multiplexing system is implemented.

[0036] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed, the control method of the optical fiber energy-communication-sensing multiplexing system is implemented.

[0037] One or more of the above technical solutions of the present invention have at least one or more of the following beneficial effects:

[0038] The present invention provides an optical fiber energy-communication-sensing multiplexing system and its control method, including: a local host composed of a transmitting part and a receiving part, and a remote access node device connected to the local host through an optical fiber; the transmitting part is used to multiplex the 1310nm-band signal and the 1550nm-band signal and send them to the remote access node device through the optical fiber; the receiving part is used to receive the communication return signal and the sensing backward scattering signal of the remote access node device, and convert the two into electrical signals to realize the optical fiber energy-communication-sensing multiplexing function; the remote access node device is used to load the acquisition signal of the sensor onto the 1310nm-band signal to obtain the communication return signal, and send the communication return signal to the receiving part through the optical fiber. The technical solution provided by the present invention has the following remarkable advantages:

[0039] 1. Highly multiplex the core devices such as lasers, modulators, drive signal generators, and detectors, reduce the hardware cost, and reduce the volume of the device;

[0040] 2. The system timing control logic is simple and flexible. On the premise that the remote node has sufficient energy, only by changing the local drive signal, functions such as information feedback, distributed vibration sensing (DAS), distributed temperature sensing (DTS), laser power supply, etc. can be achieved and independent switching is supported. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of the main structure of the fiber optic energy-communication-sensing multiplexing system according to an embodiment of the present invention;

[0042] Figure 2 is a schematic diagram showing the relationship between the signal strength and time of the energy-communication-sensing multiplexing host receiving end according to an embodiment of the present invention;

[0043] Figure 3 is a typical implementation flowchart of the energy-communication-sensing multiplexing host according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The following further details the specific embodiments of the present invention with reference to the accompanying drawings.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0046] As disclosed in the background art, fiber optic energy-communication-sensing multiplexing can integrate multiple functions such as fiber optic communication, energy transmission, and fiber optic sensing. To achieve this goal, advanced technical means are usually required, such as wavelength division multiplexing (WDM), optical time division multiplexing (OTDM), etc. These technologies can multiplex optical signals of different wavelengths, optical pulses at different times, and different sensing signals for transmission in the same optical fiber, thereby greatly improving the transmission efficiency and utilization rate of the optical fiber, reducing the amount of optical fiber used, and lowering the construction and operation and maintenance costs of the system. In addition, energy-communication-sensing multiplexing inherits the advantages of strong anti-interference ability and long transmission distance of fiber optic communication, which can ensure the reliability and stability of power system communication. At the same time, fiber optic sensing can monitor the operating status of the power system in real time, detect and handle faults in a timely manner. Therefore, fiber optic energy-communication-sensing multiplexing has broad application prospects and important strategic significance in new power systems. By adopting this technology, the transmission efficiency, reliability, and security of the power system can be further improved, laying a solid foundation for the intelligent development of the power system.

[0047] However, fiber-optic energy-sensing multiplexing technology faces many challenges in its actual development, one of which is the high cost (especially the host). The reason is that the technology needs to realize the three functions of fiber-optic communication, energy transmission and fiber-optic sensing at the same time, and each function has different requirements for device performance, modulation / demodulation methods, etc. At the same time, it is also necessary to consider issues such as channel design and timing control. It is a very complex systematic project. At present, an easy-to-implement method is to build independent hardware systems for the three major functions and integrate them in the same chassis, supplemented by software control to ensure the orderly operation of multiple functions, but the cost of this method is significantly higher than the sum of three independently operated systems, and it cannot give full play to the advantages of device multiplexing and system integration.

[0048] In order to improve the above-mentioned problems, the present invention provides an optical fiber energy signal sensing multiplexing system and a control method thereof, comprising: a local host composed of a sending part and a receiving part, and a remote access node device connected to the local host through an optical fiber; the sending part is used to combine a 1310nm band signal and a 1550nm band signal and send the combined signal to the remote access node device through an optical fiber; the receiving part is used to receive a communication return signal and a sensor backscattering signal of the remote access node device, and convert the two into electrical signals to realize the optical fiber energy signal sensing multiplexing function; the remote access node device is used to load the sensor's acquisition signal onto the 1310nm band signal to obtain a communication return signal, and send the communication return signal to the receiving part through an optical fiber.

[0049] The technical solution provided by the present invention has the following significant advantages:

[0050] 1. High reuse of core components such as lasers, modulators, drive signal generators, and detectors reduces hardware costs and reduces the size of the device;

[0051] 2. The system timing control logic is simple and flexible. Under the premise that the remote node has sufficient energy, it only needs to change the local driving signal to realize functions such as information feedback, distributed vibration sensing DAS, distributed temperature sensing DTS, laser power supply, etc. and support independent switching.

[0052] The above scheme is described in detail below.

[0053] Example 1

[0054] See attached Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the main structure of an optical fiber energy sensing multiplexing system according to an embodiment of the present invention. Figure 1 As shown, the optical fiber energy sensing multiplexing system in the embodiment of the present invention mainly includes: a local host composed of a sending part and a receiving part, and a remote access node device connected to the local host through an optical fiber;

[0055] The transmitting unit is configured to multiplex the 1310 nm band signal and the 1550 nm band signal and then send them to the remote access node device through an optical fiber;

[0056] The receiving unit is configured to receive the communication feedback signal and the sensing backscattering signal of the remote access node device, and convert the two into electrical signals to implement the optical fiber communication and sensing multiplexing function;

[0057] The remote access node device is configured to load the acquisition signal of the sensor onto the 1310 nm band signal to obtain a communication feedback signal, and send the communication feedback signal to the receiving unit through an optical fiber.

[0058] In this embodiment, the transmitting unit includes: a narrow linewidth laser, a high-power laser, a transmitting end wavelength division multiplexer, a transmitting end optical circulator, a high-speed modulator, and a high-power modulator;

[0059] The narrow linewidth laser generates a pulsed optical sequence or a continuous optical carrier in a manner modulated by the high-speed modulator with a pulsed or DC signal; the high-power laser generates a pulsed optical sequence or a continuous power supply light in a manner modulated by the high-power modulator with a pulsed or DC signal; the transmitting end wavelength division multiplexer multiplexes the two optical signals output by the high-speed modulator and the high-power modulator and inputs them from port 1 of the transmitting end optical circulator, and outputs them from port 2 to the optical fiber.

[0060] Among them, the central wavelength of the narrow linewidth laser is located at 1310 nm, and the central wavelength of the high-power laser is located at 1550 nm.

[0061] In one embodiment, the receiving unit includes: a receiving end wavelength division multiplexer, a high-speed photodetector, and a dual-band energy detector;

[0062] The receiving end wavelength division multiplexer has three band interfaces, namely a 1310 nm band interface, a 1450 nm band interface, and a 1650 nm band interface. The 1310 nm band interface is used to receive the communication feedback signal of the remote access node device and the backward Rayleigh scattering signal generated by the 1310 nm band signal through port 3 of the transmitting end optical circulator. The 1450 nm band interface and the 1650 nm band interface are respectively used to receive the backward Raman scattering signals in the 1450 nm and 1650 nm bands generated by the 1550 nm band signal through port 3 of the transmitting end optical circulator;

[0063] The high-speed photodetector is configured to demodulate the signal received by the 1310 nm band interface;

[0064] The dual-band energy detector is configured to demodulate the backward Raman scattering signal in the 1450 nm band and the backward Raman scattering signal in the 1650 nm band respectively.

[0065] The dual - band energy detector can be composed of two independent detectors (with detection center wavelengths located near 1450 nm and 1650 nm respectively), which are used to convert the backward Raman scattering light into electrical signals, and subsequent operations such as power quotient calculation will be performed to achieve the DTS function.

[0066] In one embodiment, the dual - band energy detector is composed of independent detectors with detection center wavelengths located at 1450 nm and 1650 nm respectively.

[0067] In one embodiment, the remote access node device includes: a remote wavelength division multiplexer, a photovoltaic cell and an energy management unit, an integrated optical switch, a remote optical circulator, an electro - optical modulator, and an electronic sensor;

[0068] The remote wavelength division multiplexer is used to decouple the 1310 - nm band signal and the 1550 - nm band signal;

[0069] The photovoltaic cell and the energy management unit are used to convert the 1550 - nm band power - supply laser into electrical energy and supply this energy to the integrated optical switch, the electro - optical modulator, and the electronic sensor;

[0070] The integrated optical switch is used to switch the optical path to the vacant side when the input 1310 - nm band signal is pulsed light, and switch the optical path to the side of the remote optical circulator when the input 1310 - nm band signal is continuous light;

[0071] The continuous light is input through port 2 of the remote optical circulator and output through port 3 to the electro - optical modulator. The electro - optical modulator loads the sensor data collected by the electronic sensor onto the continuous light, and then inputs it through port 2 of the remote optical circulator and outputs it through port 1 to the local host.

[0072] In one embodiment, the system includes a controller, which is specifically used to implement the following process through a preset program:

[0073] Initialize the local host system;

[0074] Turn on the high - power laser, apply a DC drive signal to the high - power modulator to make it output continuous light, turn on the narrow - line - width laser, and apply a pulsed drive signal to the high - speed modulator to make it output pulsed light;

[0075] The backward Rayleigh scattering signal generated by the pulsed light output by the high - speed modulator enters the high - speed photodetector through the local optical circulator for demodulation;

[0076] After the charging of the remote access node device is completed, the driving signal of the high-power modulator is switched to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting-end optical circulator for demodulation. The driving signal of the high-speed modulator is switched to a DC bias, and the continuous optical carrier output therefrom enters the electro-optical modulator through the integrated optical switch. After the electro-optical modulator loads the sensor data onto the continuous light, it is transmitted back to the high-speed photodetector through the remote optical circulator for demodulation.

[0077] In this solution, device multiplexing and function switching are mainly achieved through time-division multiplexing. The relationship between the signal intensity at the host receiving end and the corresponding time slot is shown as Figure 2 shown. For the high-speed photodetector: when the narrow-linewidth laser is in the sensing time slot (the driving signal of the local modulator is a pulse sequence), the backward Rayleigh scattering signal received in the 1310 nm band has an envelope presenting a triangular waveform; when the narrow-linewidth laser is in the communication time slot (the driving signal of the local modulator is a DC bias), the square wave loaded with communication data is received in the 1310 nm band. For the dual-band energy detector: when the high-power laser is in the sensing time slot (the driving signal of the local modulator is a pulse sequence), the backward Raman scattering signal received in the 1450 / 1650 nm band has an envelope presenting a triangular waveform; when the high-power laser is in the energy supply time slot (the driving signal of the local modulator is a DC bias), the residual backward Raman scattering signal of the energy supply laser is received in the 1450 / 1650 nm band.

[0078] Embodiment 2

[0079] Based on the same inventive concept, the present invention also provides a control method for an optical fiber energy and signal sensing multiplexing system. The control method for the optical fiber energy and signal sensing multiplexing system includes:

[0080] Initializing the local host system;

[0081] Turning on the high-power laser, applying a DC driving signal to the high-power modulator to make it output continuous light, turning on the narrow-linewidth laser, and applying a pulse driving signal to the high-speed modulator to make it output pulsed light;

[0082] The backward Rayleigh scattering signal generated by the pulsed light output by the high-speed modulator enters the high-speed photodetector through the local optical circulator for demodulation;

[0083] After the remote access node device is charged, the drive signal of the high-power modulator is switched to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting end optical circulator for demodulation. The drive signal of the high-speed modulator is switched to a DC bias, and the continuous optical carrier output by it enters the electro-optic modulator through the integrated optical switch. After the electro-optic modulator loads the sensor data onto the continuous light, it is transmitted back to the high-speed photodetector through the remote optical circulator for demodulation.

[0084] In a specific embodiment, as Figure 3 shown, a typical embodiment of this solution is as follows: After the local host system is initialized, the 1550nm high-power laser is turned on, and a DC drive signal is applied to the high-power modulator to make it output continuous light, thereby realizing the optical energy transmission to the remote access node. At the same time, the 1310nm narrow-linewidth laser is turned on, and a pulse drive signal is applied to the high-speed modulator to make it output pulsed light. The backward Rayleigh scattering signal enters the high-speed photodetector through the local optical circulator for demodulation, thereby realizing distributed vibration sensing along the long-distance transmission optical fiber. When the remote access node is charged, the drive signal of the high-power modulator is switched to a pulse sequence, and the backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the local optical circulator for demodulation, thereby realizing distributed temperature sensing along the long-distance transmission optical fiber. At the same time, the drive signal of the high-speed modulator is switched to a DC bias, then the continuous optical carrier output by it will enter the electro-optic modulator through the remote optical switch, load the sensor data and then be transmitted back to the local high-speed photodetector through the optical circulator, and the remote data is transmitted back after demodulation.

[0085] Embodiment 3

[0086] Based on the same inventive concept, the present invention also provides a computer device, which includes a processor and a memory. The memory is used to store a computer program, and the computer program includes program instructions. The processor is used to execute the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions. Specifically, it is suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function, so as to implement the steps of a control method for an optical fiber energy and signal multiplexing system in the above embodiments.

[0087] Embodiment 4

[0088] Based on the same inventive concept, the present invention also provides a storage medium, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a computer device and is used to store programs and data. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and, of course, the extended storage medium supported by the computer device. The computer-readable storage medium provides a storage space, and the operating system of the terminal is stored in this storage space. And, one or more instructions suitable for being loaded and executed by the processor are also stored in this storage space. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The one or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor to implement the steps of a control method for an optical fiber energy and signal multiplexing system in the above embodiments.

[0089] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) that contain computer-usable program code.

[0090] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0091] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means realizes the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0092] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or make equivalent substitutions, and any modification or equivalent substitution that does not depart from the spirit and scope of the present invention should be covered by the protection scope of the claims of the present invention.

Claims

1. An optical fiber communication and sensing multiplexing system, characterized in that, The system includes: a local host composed of a transmitting unit and a receiving unit, and a remote access node device connected to the local host through an optical fiber; The transmitting unit is used to multiplex the 1310nm band signal and the 1550nm band signal and then send them to the remote access node device through the optical fiber; The receiving unit is used to receive the communication backhaul signal and the sensing backscattering signal of the remote access node device, and convert the two into electrical signals to realize the fiber optic communication and sensing multiplexing function; The remote access node device is used to load the acquisition signal of the sensor onto the 1310nm band signal to obtain a communication backhaul signal, and send the communication backhaul signal to the receiving unit through the optical fiber.

2. The system according to claim 1, wherein The transmitting unit includes: a narrow linewidth laser, a high-power laser, a transmitting end wavelength division multiplexer, a transmitting end optical circulator, a high-speed modulator, and a high-power modulator; The narrow linewidth laser generates a pulsed light sequence or a continuous optical carrier in a manner modulated by a high-speed modulator with a pulsed or DC signal; the high-power laser generates a pulsed light sequence or a continuous power supply light in a manner modulated by a high-power modulator with a pulsed or DC signal; the transmitting end wavelength division multiplexer multiplexes the two optical signals output by the high-speed modulator and the high-power modulator and inputs them from port 1 of the transmitting end optical circulator, and outputs from port 2 to the optical fiber.

3. The system according to claim 2, wherein The central wavelength of the narrow linewidth laser is located at 1310nm, and the central wavelength of the high-power laser is located at 1550nm.

4. The system according to claim 2, wherein The receiving unit includes: a receiving end wavelength division multiplexer, a high-speed photodetector, and a dual-band energy detector; The receiving end wavelength division multiplexer has three band interfaces, namely a 1310nm band interface, a 1450nm band interface, and a 1650nm band interface. The 1310nm band interface is used to receive the communication backhaul signal of the remote access node device and the backward Rayleigh scattering signal generated by the 1310nm band signal through port 3 of the transmitting end optical circulator. The 1450nm band interface and the 1650nm band interface are respectively used to receive the backward Raman scattering signals in the 1450nm and 1650nm bands generated by the 1550nm band signal through port 3 of the transmitting end optical circulator; The high-speed photodetector is used to demodulate the signal received by the 1310nm band interface; The dual-band energy detector is used to demodulate the backward Raman scattering signal in the 1450nm band and the backward Raman scattering signal in the 1650nm band respectively.

5. The system according to claim 4, wherein The dual-band energy detector is composed of independent detectors with detection central wavelengths located at 1450nm and 1650nm respectively.

6. The system according to claim 2, wherein The remote access node device includes: a remote wavelength division multiplexer, a photovoltaic cell and an energy management unit, an integrated optical switch, a remote optical circulator, an electro-optic modulator, and an electronic sensor; The remote wavelength division multiplexer is used to decouple the 1310nm band signal and the 1550nm band signal; The photovoltaic cell and the energy management unit are used to convert the 1550nm band power supply laser into electrical energy and provide this energy to the integrated optical switch, the electro-optic modulator, and the electronic sensor; The integrated optical switch is used to switch the optical path to the vacant side when the input signal in the 1310nm band is pulsed light, and switch the optical path to the distal optical circulator side when the input signal in the 1310nm band is continuous light; The continuous light is input through port 2 of the distal optical circulator and output through port 3 to the electro-optic modulator. The electro-optic modulator loads the sensor data collected by the electronic sensor onto the continuous light, and is input through port 2 of the distal optical circulator and output through port 1 to the local host.

7. The system according to claim 6, wherein The system includes a controller, which is specifically used to implement the following process through a preset program: Initialize the local host system; Turn on the high-power laser, apply a DC drive signal to the high-power modulator to make it output continuous light, turn on the narrow-linewidth laser, and apply a pulsed drive signal to the high-speed modulator to make it output pulsed light; The backward Rayleigh scattering signal generated by the pulsed light output by the high-speed modulator enters the high-speed photodetector through the local optical circulator for demodulation; After the distal access node device is fully charged, switch the drive signal of the high-power modulator to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting-end optical circulator for demodulation. Switch the drive signal of the high-speed modulator to a DC bias. The continuous optical carrier output by it enters the electro-optic modulator through the integrated optical switch. The electro-optic modulator loads the sensor data onto the continuous light and then returns it to the high-speed photodetector through the distal optical circulator for demodulation.

8. A control method for an optical fiber communication and sensing multiplexing system, characterized in that, The method includes: Initialize the local host system; Turn on the high-power laser, apply a DC drive signal to the high-power modulator to make it output continuous light, turn on the narrow-linewidth laser, and apply a pulsed drive signal to the high-speed modulator to make it output pulsed light; The backward Rayleigh scattering signal generated by the pulsed light output by the high-speed modulator enters the high-speed photodetector through the local optical circulator for demodulation; After the distal access node device is fully charged, switch the drive signal of the high-power modulator to a pulse sequence. The backward Raman scattering signal generated by the high-power optical pulse sequence enters the dual-band energy detector through the transmitting-end optical circulator for demodulation. Switch the drive signal of the high-speed modulator to a DC bias. The continuous optical carrier output by it enters the electro-optic modulator through the integrated optical switch. The electro-optic modulator loads the sensor data onto the continuous light and then returns it to the high-speed photodetector through the distal optical circulator for demodulation.

9. A computer device, characterized in that, Including: One or more processors; The processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the control method of the fiber optic energy and signal multiplexing system as claimed in claim 8 is implemented.

10. A computer-readable storage medium, characterized in that, There is a computer program stored thereon, and when the computer program is executed, the control method of the fiber optic energy and signal multiplexing system as claimed in claim 8 is implemented.

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