Uplink communication method and system of optical sensing communication, electronic equipment and storage medium

Abstract

The application relates to the field of optical fiber sensing, and more particularly to an uplink communication method and system of optical sensing communication, an electronic device and a storage medium. The method comprises the following steps: collecting a sensing electric signal; encoding the sensing electric signal to obtain encoded data; modulating the encoded data based on a frequency joint amplitude to obtain an injection signal; and vibrating an optical fiber through a preset mode to transmit the injection signal based on the optical fiber. The method can improve the transmission efficiency of terminal uplink communication, and increase the transmission distance and improve the reliability of terminal uplink communication.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber sensing, and more particularly, to an uplink communication method and system for optical sensing communication, an electronic device and a storage medium. BACKGROUND

[0002] At present, optical fiber sensing communication is a technology based on the transmission of optical signals in optical fibers, realizing the sensing and data interaction between terminals and control centers and / or optical fiber base stations. It is widely used in special scenarios such as unmanned area monitoring, underground pipe gallery operation and maintenance, and power grid state monitoring. In these scenarios, the terminal undertakes the core task of uplink communication, and needs to efficiently return the real-time sensing data collected by the sensors distributed in a wide area to the control center and / or optical fiber base station, so the transmission performance of the terminal directly determines the response speed and reliability of the entire transmission process. However, the current mainstream optical fiber sensing communication technology, especially the terminal uplink communication, still faces significant bottlenecks: the terminal uplink communication of the existing technology generally uses traditional modulation methods, and the data transmission rate is only maintained at the order of hundreds of bits per second (bps), and the transmission distance is short, and the data decays quickly outside the effective transmission distance. This low-speed and short-distance transmission characteristic is difficult to support continuous transmission of high-frequency sampling data, and cannot meet the massive data return demand of the corresponding terminal when a large number of sensors are accessed in parallel. SUMMARY

[0003] The present application provides an uplink communication method and system for optical sensing communication, an electronic device and a storage medium, which are used to improve the transmission efficiency of terminal uplink communication, and increase the transmission distance and improve the reliability of terminal uplink communication.

[0004] According to a first aspect of the present application, an uplink communication method for optical sensing communication is provided, the method comprising:

[0005] acquiring a sensing electrical signal;

[0006] encoding the sensing electrical signal to obtain encoded data;

[0007] modulating the encoded data based on frequency joint amplitude to obtain an injection signal;

[0008] vibrating an optical fiber by a preset mode through the injection signal to transmit the injection signal based on the optical fiber.

[0009] It can be understood that by accurately collecting the sensing electrical signal and encoding it to generate encoded data, then using frequency and amplitude joint modulation to convert the encoded data into a multi-dimensional feature injection signal, and finally loading the signal into the optical fiber for transmission in a preset manner, a complete link from signal perception, data processing to physical layer transmission is formed, the data effectiveness is improved by encoding, the signal robustness is enhanced by frequency and amplitude joint modulation, thereby ensuring high-speed transmission efficiency and long-distance transmission capability, and efficient and reliable optical sensing communication is realized.

[0010] Optionally, the encoding of the sensing electrical signal obtains encoded data, including:

[0011] Analog-to-digital conversion of the sensing electrical signal obtains a plurality of level values;

[0012] A plurality of the level values are encoded according to a preset encoding table to obtain encoded data containing a plurality of encoding symbols, the encoding table containing a plurality of preset quantization level values and a plurality of preset encoding symbols; wherein each of the quantization level values corresponds to one of the encoding symbols.

[0013] It can be understood that after the collected sensing electrical signal is decomposed into a plurality of level values through analog-to-digital conversion, and then mapped and encoded according to the encoding table, the encoded data composed of a plurality of encoding symbols is formed, realizing the structured digital processing of the original electrical signal, which not only effectively avoids data redundancy, but also improves the accuracy of signal processing and the reliability of subsequent modulation transmission through standardized encoding rules.

[0014] Optionally, the encoded data contains a plurality of encoding symbols; the modulation of the encoded data based on frequency joint amplitude obtains an injection signal, including:

[0015] Each encoding symbol of the encoded data obtains a corresponding modulation frequency-modulation amplitude level pair as a sub-injection signal according to a preset frequency-amplitude modulation table, and all the sub-injection signals are summarized to form an injection signal; wherein the frequency-amplitude modulation table contains a plurality of preset modulation frequencies, a plurality of preset modulation amplitude levels, and a plurality of the encoding symbols, each of the modulation frequencies corresponds to a plurality of the modulation amplitude levels to form a plurality of modulation frequency-modulation amplitude level pairs, and each of the encoding symbols corresponds to one of the modulation frequency-modulation amplitude level pairs.

[0016] It can be understood that by mapping each code symbol in the coded data to a sub-injection signal with specific frequency-amplitude characteristics according to a frequency-amplitude modulation table containing multiple modulation frequencies and corresponding modulation amplitude levels, and forming a complete injection signal through the cooperative combination of several sub-injection signals, multi-dimensional dynamic modulation of the coded data is achieved, which not only fully utilizes the dual degrees of freedom of frequency and amplitude of the optical fiber channel, but also enhances the anti-interference ability and spectral efficiency of signal transmission through precise parameter matching mechanism, so that the signal can still maintain high-fidelity transmission characteristics in complex environment.

[0017] Optionally, the injection signal comprises a plurality of sub-injection signals.

[0018] The vibration of the optical fiber by the injection signal in a preset manner comprises:

[0019] According to each sub-injection signal in the injection signal, the optical fiber is vibrated for a preset vibration duration, and the preset vibration duration is obtained based on a preset fast Fourier transform window.

[0020] It can be understood that by accurately controlling the duration of the vibration of each sub-injection signal on the optical fiber based on the preset fast Fourier transform window, time-frequency synchronization of the signal loading and demodulation process is achieved, which ensures the periodic characteristics of the injection signal in the time domain, and optimizes the signal energy distribution through frequency domain analysis, effectively improves the signal-to-noise ratio and anti-interference ability of optical sensing communication, so that the injection signal can be transmitted stably at a long distance under complex channel conditions, and a precise time-frequency reference framework is provided for the subsequent demodulation link.

[0021] Optionally, the preset vibration duration is obtained based on a preset fast Fourier transform window, comprising:

[0022] Obtain the sampling rate of a demodulation component, the demodulation component being used to connect the optical fiber and receive and demodulate the reflected light signal of the optical fiber;

[0023] Preset window sampling number;

[0024] Preset fast Fourier transform window according to the window sampling number and the sampling rate;

[0025] The size of the fast Fourier transform window is used as the preset vibration duration.

[0026] Understandably, by pre-constructing a Fast Fourier Transform (FFT) window based on the demodulation component's sampling rate and a preset window sampling number, and directly mapping the size of the FFT window to a preset vibration duration, precise time-frequency synchronization of the signal injection and demodulation process is achieved. This ensures that the periodic characteristics of the signal in the time domain match the optimal resolution of the frequency domain analysis. Furthermore, through the strict correspondence between the physical layer vibration duration and the digital signal processing window, the signal-to-noise ratio, anti-interference capability, and signal restoration accuracy of optical sensing communication are significantly improved, providing a time-frequency coordination technical guarantee for stable communication over long distances and in multiple scenarios.

[0027] According to a second aspect of this application, an uplink communication method for optical sensing communication is applied to an optical sensing communication base station, the method comprising:

[0028] The reflected light signal of the optical fiber is collected, wherein the reflected light signal is formed by injecting the injected signal into the optical fiber through the optical sensing communication terminal in accordance with the uplink communication method of optical sensing communication described in the first aspect, and the collection is performed using the demodulation component of the optical sensing communication base station.

[0029] The reflected light signal is converted into an electrical signal through photoelectric conversion.

[0030] The electrical signal is demodulated and decoded to obtain decoded data;

[0031] The sensor electrical signal collected by the optical sensing communication terminal is obtained based on the decoded data.

[0032] Understandably, the demodulation component of the optical sensing communication base station accurately acquires the reflected light signal in the optical fiber caused by the signal injected by the terminal. After photoelectric conversion to restore the optical signal to an electrical signal, the original sensing electrical signal is finally reconstructed through a demodulation and decoding process adapted to the encoding and modulation of the optical sensing communication terminal. This forms a closed-loop communication chain from signal injection, optical fiber transmission, optical signal acquisition to electrical signal demodulation. By accurately matching the encoding and modulation rules of the optical sensing communication terminal with the demodulation algorithm of the optical sensing communication base station, and combining the characteristics of the optical fiber channel, high-fidelity signal transmission is achieved. This effectively solves the problem of signal attenuation and distortion in long-distance, multi-interference scenarios, ensuring the accurate transmission of sensing data.

[0033] According to a third aspect of this application, an uplink communication system for optical sensing communication is provided, applied to an optical sensing communication terminal, the system comprising:

[0034] Electrical signal acquisition module, used to acquire sensor electrical signals;

[0035] The encoded data acquisition module is used to encode the sensing electrical signal to obtain encoded data;

[0036] An injection signal acquisition module is used to modulate the encoded data based on frequency and amplitude to obtain an injection signal;

[0037] The transmission module is used to vibrate the optical fiber with the injected signal in a preset manner so as to transmit the injected signal based on the optical fiber.

[0038] According to a fourth aspect of this application, an uplink communication system for optical sensing communication is provided, applied to an optical sensing communication base station, the system comprising:

[0039] The acquisition module is used to acquire the reflected light signal of the optical fiber, wherein the reflected light signal is formed by injecting the injected signal into the optical fiber through the optical sensing communication terminal in accordance with the uplink communication method of optical sensing communication described in the first aspect, and the acquisition is performed using the demodulation component of the optical sensing communication base station.

[0040] A photoelectric conversion module is used to convert the reflected light signal into an electrical signal through photoelectric conversion.

[0041] The demodulation and decoding module is used to demodulate and decode the electrical signal to obtain decoded data;

[0042] The sensing electrical signal acquisition module is used to acquire the sensing electrical signal collected by the optical sensing communication terminal based on the decoded data.

[0043] According to a fifth aspect of this application, an electronic device is provided, comprising:

[0044] Memory, used to store one or more computer programs;

[0045] A processor, when the one or more computer programs are executed by the processor, implements the uplink communication method of optical sensing communication described in the first or second aspect above.

[0046] According to a sixth aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions, the computer instructions being configured to cause a processor to execute and implement an uplink communication method for optical sensing communication as described in the first or second aspect above.

[0047] Based on any of the above aspects, embodiments of this application provide an uplink communication method, system, electronic device, and storage medium for optical sensing communication, which involves: acquiring sensing electrical signals; encoding the sensing electrical signals to obtain encoded data; modulating the encoded data based on frequency and amplitude to obtain an injection signal; and vibrating an optical fiber with the injection signal in a preset manner to transmit the injection signal through the optical fiber. This application can achieve the following benefits:

[0048] Improving the communication efficiency of terminal uplink communication: By employing an encoding table that maps quantized levels to encoded symbols, the sensor electrical signals are efficiently encoded, reducing the amount of invalid data transmission. Subsequently, a dual-dimensional modulation strategy based on frequency and amplitude is used to convert the encoded data into several sub-injection signals, fully utilizing the frequency-amplitude two-dimensional resources of the fiber optic channel and significantly increasing the effective payload capacity per unit time. Furthermore, by precisely controlling the vibration duration through a preset Fast Fourier Transform window, the signal injection and demodulation processes are strictly synchronized, avoiding the additional overhead of traditional time-domain segmentation. This enables end-to-end optimization from data generation and channel adaptation to information synchronization, achieving a significant improvement in communication efficiency.

[0049] Improving the transmission distance of terminal uplink communication: By using optical fiber as the transmission medium and combining it with vibration signal injection technology, electromagnetic interference and geographical barriers are effectively overcome, and the theoretical transmission distance can stably cover more than 60 kilometers. In power grid scenarios, the high reliability of the optical fiber network and the strong penetration of vibration signals ensure the backhaul of power equipment monitoring data; in uninhabited areas, the passive optical sensing architecture does not require local power supply and can achieve ultra-long-distance communication solely based on the physical characteristics of the optical fiber itself; for underwater emergency scenarios, the low attenuation characteristics of optical signals in water, combined with the vibration excitation device, ensures stable communication even in extreme environments. This application demonstrates strong environmental adaptability, providing a reliable solution for emergency communication in remote areas and complex working conditions. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart of an uplink communication method for an optical sensing communication terminal provided in this embodiment.

[0052] Figure 2 This is a flowchart for obtaining encoded data provided in this embodiment.

[0053] Figure 3 This is a flowchart for obtaining the vibration duration provided in this embodiment.

[0054] Figure 4 This is a flowchart illustrating an uplink communication method for optical sensing communication applied to an optical sensing communication base station, as provided in this embodiment.

[0055] Figure 5 This is a flowchart of the demodulation and decoding of electrical signals provided in this embodiment.

[0056] Figure 6 This is a functional module diagram of an uplink communication system for an optical sensing communication terminal provided in this embodiment.

[0057] Figure 7 This is a functional module diagram of an uplink communication system for optical sensing communication base stations provided in this embodiment.

[0058] Figure 8 This is a schematic diagram of the structure of the electronic device provided in this embodiment. Detailed Implementation

[0059] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this application. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0060] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0061] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0062] Current fiber optic sensor communication technology suffers from significant performance bottlenecks in the uplink communication stage of optical sensor communication terminals. The commonly used traditional modulation methods can only achieve data transmission rates in the hundreds of bits per second range, and the transmission distance is significantly limited. This makes it difficult to support continuous backhaul of high-frequency sampled data, and also fails to meet the massive data interaction demands generated by the parallel access of multiple sensors in wide-area distributed scenarios. Particularly in typical application scenarios such as unattended areas, underground utility tunnels, and power grid monitoring, optical sensor communication terminals face prominent problems such as low data backhaul efficiency and high response latency, resulting in overall transmission reliability and real-time performance failing to meet the needs of industrial-grade monitoring and maintenance.

[0063] This embodiment provides a technical solution that can solve the above problems. The specific implementation of this application will be described in detail below with reference to the accompanying drawings.

[0064] like Figure 1 As shown, this embodiment provides an uplink communication method for optical sensing communication, applied to an optical sensing communication terminal. The method can be further divided into the following steps:

[0065] S110, Acquire sensor electrical signals;

[0066] Understandably, in fiber optic sensing technology, the optical sensing communication base station emits a laser, causing the optical signal to be transmitted in the forward direction through the optical fiber. Understandably, utilizing the characteristic of optical fibers being sensitive to vibration disturbances on and / or in the vicinity of the fiber, the location of the vibration sensing point on the fiber can influence the optical signal at that location based on the vibration disturbance, causing the optical signal to generate a reflected light signal in the opposite direction to the forward direction. This reflected light signal is then transmitted to the optical sensing communication base station and received by the base station. In practical applications, by modulating the vibration signal, the vibration signal can carry information about the external environment at the location of the optical fiber, including but not limited to temperature, pressure, gas, and humidity, thereby achieving the sensing of the external environmental conditions at the location of the optical fiber.

[0067] Therefore, the optical sensing communication terminal also integrates sensors for collecting information about the external environment. It is understood that these sensors can convert the collected information into sensing electrical signals and transmit them to the optical sensing communication terminal, providing a standardized data foundation for subsequent encoding steps.

[0068] S120. Encode the sensing electrical signal to obtain encoded data;

[0069] In this embodiment, the electrical signal carries information about the external environment at the location of the optical fiber. To improve the efficiency of transmission and communication, the sensing electrical signal needs to be encoded to obtain encoded data. Preferably, the encoded data can be a string of binary bits.

[0070] Specifically, such as Figure 2As shown, encoding the sensing electrical signal to obtain encoded data may include the following steps:

[0071] S121. Perform analog-to-digital conversion on the sensing electrical signal to obtain several level values;

[0072] In this embodiment, the sensing electrical signal is a continuous analog signal, which needs to be quantized. Specifically, it is subjected to analog-to-digital conversion to obtain several discrete points carrying level values, and the level values ​​of the discrete points need to be encoded.

[0073] S122. Encode the several level values ​​according to the encoding table to obtain encoded data containing several encoding symbols, wherein the encoding table contains several preset quantization level values ​​and several preset encoding symbols, and each quantization level value corresponds to one encoding symbol.

[0074] In this embodiment, each quantization level value in the encoding table corresponds to a mapped encoding symbol, forming a mapping relationship between quantization level values ​​and encoding symbols. All mapping relationships form an encoding table for encoding. Preferably, the quantization level value can be a voltage value and / or a current value. For example, if the quantization level value is a voltage value, then several quantization level values ​​such as a volt (V) and b volt (V) are preset, and the quantization level values ​​correspond to the following mapping relationship: the encoding symbol corresponding to a volt (V) is 00, the encoding symbol corresponding to b volt (V) is 01, etc., thereby forming a complete encoding table. It is understood that the encoding table needs to be preset, and when presetting the quantization level values ​​in the encoding table, the upper and lower limit ranges of the sensing electrical signal and the accuracy between the corresponding quantization level values ​​need to be considered. However, the upper and lower limit ranges and accuracy are not the focus of this application, so they will not be elaborated here.

[0075] In this embodiment, the level value of a discrete point is compared with the encoding table to obtain the mapping relationship with the encoding symbol, thereby obtaining the encoding symbol of the level value of the discrete point. The set of encoding symbols of the level values ​​corresponding to all discrete points of the sensing electrical signal forms the encoded data. For example, there are two discrete points in the sensing electrical signal. The level value of the first discrete point is a volt (V), and the level value of the second discrete point is b volt (V). Therefore, the encoding symbol of the level value of the first discrete point is 00, and the encoding symbol of the level value of the second discrete point is 01. Therefore, the encoded data corresponding to the sensing electrical signal is 00 01.

[0076] S130. Modulate the encoded data based on frequency and amplitude to obtain an injection signal;

[0077] In this embodiment, the encoded data can be a string of binary bits, which cannot be directly converted into a vibration signal to affect the optical fiber. Therefore, the encoded data needs to be modulated based on frequency and amplitude to obtain an injection signal. Preferably, the injection signal is a signal formed by several frequencies with preset amplitudes.

[0078] Specifically, the step of modulating the encoded data based on frequency-amplitude joint modulation to obtain the injection signal includes:

[0079] Each coded symbol of the encoded data is used as a sub-injection signal by obtaining the corresponding modulation frequency-modulation amplitude level pair according to the preset frequency amplitude modulation table. All the sub-injection signals are then aggregated to form an injection signal. The frequency amplitude modulation table contains a number of preset modulation frequencies, a number of preset modulation amplitude levels, and a number of coded symbols. Each modulation frequency corresponds to a number of modulation amplitude levels to form a number of modulation frequency-modulation amplitude level pairs, and each coded symbol corresponds to one modulation frequency-modulation amplitude level pair.

[0080] In this embodiment, the preset modulation frequency can guide how the optical sensing communication terminal vibrates the optical fiber. For example, the modulation frequency in the frequency amplitude modulation table can be a value such as cHz (Hz) or dHz (Hz). It is understood that the frequency amplitude modulation table needs to be preset, and the setting of the modulation frequency in the table needs to be coordinated with the upper and lower limits of the receivable bandwidth of the demodulation component of the optical sensing communication base station, and the interval accuracy between the modulation frequencies needs to be considered, so that the demodulation component can distinguish different modulation frequencies. However, the upper and lower limits of the receivable bandwidth and the interval accuracy are not the focus of this application and will not be elaborated upon here.

[0081] It is understood that each modulation frequency has a corresponding amplitude, which reflects the signal strength of the modulation frequency. In this embodiment, each modulation frequency corresponds to several modulation amplitude levels. Preferably, the modulation amplitude levels can be high modulation amplitude levels and low modulation amplitude levels.

[0082] In this embodiment, each modulation frequency corresponds to several modulation amplitude levels, forming several modulation frequency-modulation amplitude level pairs. For example, when the modulation frequency is c Hz, two modulation frequency-modulation amplitude level pairs can be formed: c Hz-high modulation amplitude level pair and c Hz-low modulation amplitude level pair; when the modulation frequency is d Hz, two modulation frequency-modulation amplitude level pairs can be formed: d Hz-high modulation amplitude level pair and d Hz-low modulation amplitude level pair.

[0083] Preferably, each modulation amplitude level is provided with an amplitude threshold. For example, the low amplitude threshold corresponding to the low modulation amplitude level can be e, and the high amplitude threshold corresponding to the high modulation amplitude level can be f. Then, the sub-injection signal belonging to the c Hz - high modulation amplitude level pair can be c Hz, and its corresponding amplitude needs to exceed the high amplitude threshold f. The sub-injection signal belonging to the c Hz - low modulation amplitude level pair can be c Hz, and its corresponding amplitude needs to exceed the low amplitude threshold e but not exceed the high amplitude threshold f.

[0084] In this embodiment, a modulation frequency-modulation amplitude level pair needs to be obtained for each coded symbol as the sub-injection signal corresponding to the coded symbol. It is understood that the frequency amplitude modulation table completely records the mapping relationship between coded symbols and modulation frequency-modulation amplitude level pairs, enabling subsequent modulation of coded data containing multiple coded symbols according to the frequency amplitude modulation table to obtain an injection signal containing multiple sub-injection signals. For example, the frequency amplitude modulation table is: cHz-low modulation amplitude level pair corresponding to coded symbol 00, cHz-high modulation amplitude level pair corresponding to coded symbol 01, dHz-low modulation amplitude level pair corresponding to coded symbol 10, and dHz-high modulation amplitude level pair corresponding to coded symbol 11. It is understood that the number of coded symbols modulated is related to the number of preset modulation frequencies and the number of modulation amplitude levels, and can be appropriately adjusted during the preset frequency amplitude modulation table process according to actual conditions.

[0085] In this embodiment, each coded symbol in the coded data is modulated according to the frequency amplitude modulation table to obtain several injection signals. For example, if the coded data is 00 01, then by referring to the frequency amplitude modulation table, the modulation frequency-modulation amplitude level pair corresponding to coded symbol 00 is c Hz - low modulation amplitude level pair, so the injection signal obtained by coded symbol 00 is c Hz, and its corresponding set amplitude can be greater than e but not greater than f; the modulation frequency-modulation amplitude level pair corresponding to coded symbol 01 is c Hz - high modulation amplitude level pair, so the injection signal obtained by coded symbol 01 is c Hz, and its corresponding set amplitude needs to exceed f.

[0086] S140. The injected signal is used to vibrate the optical fiber in a preset manner so as to transmit the injected signal based on the optical fiber.

[0087] In this embodiment, the injected signal guides the optical sensing communication terminal on how to apply vibration to the optical fiber, so that the vibration applied to the optical fiber can carry the information to be transmitted and affect the optical signal of the optical fiber, causing it to generate a reflected light signal in the opposite direction, which is transmitted back to the optical sensing communication base station and received and collected, so that the injected signal can complete the transmission based on the optical fiber. The optical sensing communication terminal is used to contact the optical fiber and apply vibration to it.

[0088] Specifically, the step of vibrating the optical fiber with the injected signal in a preset manner includes:

[0089] The optical fiber is continuously vibrated for a preset duration based on each sub-injection signal in the injection signal, the preset vibration duration being obtained based on a preset fast Fourier transform window.

[0090] In this embodiment, each sub-injection signal in the injected signal needs to continuously vibrate the optical fiber for a preset vibration duration to prevent the optical sensing communication base station from failing to collect the reflected light signal affected by the sub-injection signal due to accidental errors. Simultaneously, the preset vibration duration is obtained based on a preset Fast Fourier Transform window, synchronizing the vibration time of the injected signal with the demodulation processing time, thereby improving the accuracy and reliability of data transmission.

[0091] Preferably, considering the different environments in which the optical fiber is deployed, the way the optical sensing communication terminal vibrates the optical fiber also varies. If the optical fiber is distributed on land, the vibrating optical sensing communication terminal can be clamped onto the surface of the optical fiber. The built-in miniature vibrator of the optical sensing communication terminal can generate controllable disturbances on the surface of the optical fiber sheath, introducing a phase change in the optical signal during reflection and propagation. Using an optical sensing communication terminal clamped onto the surface of the optical fiber does not require damaging the optical fiber sheath, allowing for access anytime and anywhere, improving the efficiency of optical sensing communication terminal access and the maintainability of the optical fiber.

[0092] If the optical fiber is distributed in water, the vibrating optical sensing communication terminal can be positioned within the effective range of the optical fiber to induce acoustic disturbance, causing a phase change in the optical signal during reflection and propagation. Underwater optical sensing communication terminals can be deployed in various ways according to actual sensing needs. For example, a fixed deployment can be adopted: fixing the optical sensing communication terminal to underwater infrastructure, such as bridge piers, wharf pile foundations, and underwater pipe gallery nodes, suitable for long-term monitoring and communication; a semi-fixed deployment can be adopted: fixing the optical sensing communication terminal to anchor points on the shore or seabed, and maintaining a certain floating range through flexible cables, balancing the stability and flexibility of the optical sensing communication terminal; a floating deployment can be adopted: the optical sensing communication terminal is designed as a water-pressure-resistant sealed chamber, capable of floating freely with water flow or tides, receiving control commands and transmitting data back via acoustic waves, suitable for waterway inspection or emergency deployment.

[0093] Specifically, such as Figure 3 As shown, the preset vibration duration is obtained based on a preset fast Fourier transform window and may include the following steps:

[0094] S141. Obtain the sampling rate of the demodulation component, wherein the demodulation component is used to connect to the optical fiber and receive and demodulate the reflected light signal of the optical fiber;

[0095] In this embodiment, the demodulation component can receive the reflected light signal from the optical fiber, demodulate and decode the reflected light signal to obtain the sensing information transmitted to the optical sensing base station. It is understood that obtaining the sampling rate of the demodulation component allows for the acquisition of the demodulation parameters followed by the demodulation component, enabling synchronization of processing information between the demodulation end and the injection end, thereby allowing the transmitted data to be better identified. Specifically, the sampling rate reflects the total number of sampling points that the demodulation component can sample per second.

[0096] S142, Preset window sampling number;

[0097] Understandably, in the demodulation component, a segment of sampled data needs to be processed in segments to improve the accuracy of recognition and processing. Therefore, in this embodiment, a preset window sampling number, that is, the number of sampling points that can be processed in one segmentation process, is set to correspond to the preset duration of one segmentation process.

[0098] S143. Pre-set the Fast Fourier Transform window according to the number of window samples and the sampling rate;

[0099] In this embodiment, based on the number of samples and the sampling rate of the window, the number of samples that the Fast Fourier Transform window can encompass and the corresponding window size can be determined, and the sampled data can then be segmented using the Fast Fourier Transform window.

[0100] S144. The size of the Fast Fourier Transform window is used as the preset vibration duration.

[0101] In this embodiment, the size of the Fast Fourier Transform (FFT) window can reflect the duration of the FFT window. By directly using the duration of the FFT window as the preset vibration duration, the information contained in one FFT window during demodulation is the modulation information corresponding to one coded symbol, thereby improving the recognition accuracy of the coded symbol.

[0102] Understandably, if the sampling rate of the demodulation component is obtained... The preset window sampling number is If the sub-injection signal obtained for each coded symbol is injected into the optical fiber without setting a silence and / or guard interval, that is, after the sub-injection signal of the current coded symbol completes a continuous vibration for the duration, the sub-injection signal of the next coded symbol immediately begins a continuous vibration for the duration, and there is no interval between the two vibrations, then the vibration duration is... It can be:

[0103]

[0104] The symbol transmission rate of a single coded symbol for:

[0105]

[0106] For a real signal acquired by a Fast Fourier Transform window, since it is pre-defined that only the positive spectrum (including the Nyquist frequency) is used for encoding, the number of available frequency points is limited. for:

[0107]

[0108] When only considering the correspondence between modulation frequency and coded symbol, i.e., the amplitude corresponding to the modulation frequency does not carry bit information, the amount of bit information that each sub-injection signal can carry is... for:

[0109]

[0110] Then, considering only the bit rate achievable when using the mapping between modulation frequency and coded symbols... for:

[0111]

[0112] If we consider using a modulation frequency-modulation amplitude level pair to map to coded symbols, and the introduced modulation amplitude level is... If there are 1, then the number of bits of information that each injected signal can carry is 1. for:

[0113]

[0114] The bit rate that this application can achieve for:

[0115]

[0116] Understandably, the introduction of modulation amplitude levels results in a bit rate increase. for:

[0117]

[0118] Understandably, at the sampling rate And the preset window sampling number is When the value is constant, the bit rate increment Number of available frequency points It is irrelevant and entirely determined by the modulation amplitude level. and symbol transmission rate Decide.

[0119] For example, in practical applications, if the sampling rate For 3MHz, number of window samples There are 8 modulation amplitude levels. With two, the bit rate can be obtained. The speed is 1.125 Mbps. It can be seen that this application achieves a transmission rate exceeding 1 Mbps using only two levels of amplitude modulation without changing the sampling rate.

[0120] In this embodiment, as Figure 4 As shown, it also includes an uplink communication method for optical sensing communication, applied to an optical sensing communication base station, the method including the following steps:

[0121] S210. Acquire the reflected light signal of the optical fiber, wherein the reflected light signal is formed by injecting the injected signal into the optical fiber through the optical sensing communication terminal according to the uplink communication method of the optical sensing communication described above, and the acquisition is performed using the demodulation component of the optical sensing communication base station.

[0122] In this embodiment, the injected signal can guide the optical sensing communication terminal to vibrate the optical fiber at the optical fiber position. The optical signal in the optical fiber will generate a reflected optical signal in the opposite direction due to the vibration. The reflected optical signal can be transmitted back to the optical sensing communication base station based on the optical fiber reflection, so that the demodulation component set in the optical sensing communication base station can collect the reflected optical signal as the data basis for subsequent identification and encoding data.

[0123] S220. The reflected light signal is photoelectrically converted to an electrical signal;

[0124] In this embodiment, since the reflected light signal is essentially a light wave carrying specific information, it cannot be directly recognized or processed by conventional electronic devices. By converting the reflected light signal into an electrical signal, the electrical signal can undergo standardized processing such as amplification, filtering, and analog-to-digital conversion using a mature electronic processing architecture, effectively eliminating environmental noise interference and improving signal quality.

[0125] S230. Demodulate and decode the electrical signal to obtain decoded data;

[0126] Specifically, in one implementation, such as Figure 5 As shown, the demodulation and decoding of the electrical signal to obtain decoded data may include the following steps:

[0127] S231. Perform a Fast Fourier Transform on the electrical signal based on a preset Fast Fourier Transform window to obtain several segmented data.

[0128] In this embodiment, the electrical signal is subjected to a fast Fourier transform to obtain several segments of data, so that each subsequent segment of data can be identified as a corresponding coded symbol.

[0129] S232. Obtain the vibration frequency and corresponding vibration amplitude in the segmented data to form a vibration frequency-vibration amplitude pair;

[0130] In this embodiment, each segment of data can obtain the vibration frequency and the corresponding vibration amplitude that occur several times, thereby forming a vibration frequency-vibration amplitude pair, and each vibration frequency-vibration amplitude pair can correspond to a coding symbol.

[0131] S233. Demodulate all the vibration frequency-vibration amplitude pairs based on the frequency amplitude demodulation table to obtain demodulated data; wherein the frequency amplitude demodulation table is set according to the frequency amplitude modulation table.

[0132] In this embodiment, the frequency amplitude demodulation table is set according to the frequency amplitude modulation table, so that the demodulation rules correspond one-to-one with the modulation rules. Understandably, based on the above description of the frequency amplitude modulation table, the frequency amplitude demodulation table can, for example, be: cHz (Hz) - low vibration amplitude level corresponding to code symbol 00, cHz (Hz) - high vibration amplitude level corresponding to code symbol 01, dHz (Hz) - low vibration amplitude level corresponding to code symbol 10, and dHz (Hz) - high vibration amplitude level corresponding to code symbol 11.

[0133] Understandably, if the obtained vibration frequency-vibration amplitude pair has c Hz - g amplitude and c Hz - h amplitude, then according to the frequency amplitude demodulation table, the g amplitude is found to exceed the low amplitude threshold e but not exceed the high amplitude threshold f, and the h amplitude is found to exceed the high amplitude threshold f. Therefore, the g amplitude belongs to the low vibration amplitude level, and the h amplitude belongs to the high vibration amplitude level. The encoding symbol corresponding to the c Hz - g amplitude is 00, and the encoding symbol corresponding to the c Hz - h amplitude is 01. Therefore, the obtained demodulated data is 00 01.

[0134] S234. Decode the demodulated data according to the decoding table to obtain decoded data; wherein the decoding table is set according to the encoding table.

[0135] In this embodiment, the decoding table is configured according to the encoding table, so that the decoding rules correspond one-to-one with the encoding rules. Understandably, based on the above description of the encoding table, the decoding table can, for example, be: encoding symbol 00 corresponds to a volt (V), and encoding symbol 01 corresponds to b volt (V).

[0136] Understandably, if the demodulated data obtained is 00 01, then according to the decoding table, the decoded value obtained by the encoded symbol 00 is a volt (V), and the decoded value obtained by the encoded symbol 01 is b volt (V). Therefore, the decoded data obtained is a volt (V) and b volt (V).

[0137] S240. Based on the decoded data, obtain the sensing electrical signal collected by the optical sensing communication terminal.

[0138] In this embodiment, the sensing electrical signal obtained based on the decoded data carries sensing information at the location of the optical fiber. Based on the sensing information, information about the outside world at the location of the optical fiber can be obtained, thereby enabling the transmission of the information about the outside world at the location of the optical fiber to the optical sensing communication base station through encoding and optical fiber.

[0139] like Figure 6 As shown in the illustration, this application also provides an uplink communication system for optical sensing communication, applied to an optical sensing communication terminal. Optionally, the system includes:

[0140] The system comprises an electrical signal acquisition module 311, an encoded data acquisition module 312, an injection signal acquisition module 313, and a transmission module 314, wherein:

[0141] Electrical signal acquisition module 311 is used to acquire sensor electrical signals;

[0142] In this embodiment, the electrical signal acquisition module 311 can be used to perform... Figure 1For a detailed description of the electrical signal acquisition module 311, please refer to the description of step S110 shown.

[0143] The encoded data acquisition module 312 is used to encode the sensing electrical signal to obtain encoded data;

[0144] In this embodiment, the encoded data acquisition module 312 can be used to perform... Figure 1 For a detailed description of the encoded data acquisition module 312 shown in step S120, please refer to the description of step S120.

[0145] The injection signal acquisition module 313 is used to modulate the encoded data based on frequency and amplitude to obtain an injection signal;

[0146] In this embodiment, the injection signal acquisition module 313 can be used to perform... Figure 1 For a detailed description of the injection signal acquisition module 313, please refer to the description of step S130 shown.

[0147] The transmission module 314 is used to vibrate the optical fiber with the injected signal in a preset manner so as to transmit the injected signal based on the optical fiber.

[0148] In this embodiment, the transmission module 314 can be used to perform... Figure 1 For a detailed description of the transmission module 314, please refer to the description of step S140 shown.

[0149] like Figure 7 As shown in the illustration, this application also provides an uplink communication system for optical sensing communication, applied to an optical sensing communication base station. Optionally, the system includes:

[0150] The module comprises: acquisition module 411, photoelectric conversion module 412, demodulation and decoding module 413, and sensing electrical signal acquisition module 414, wherein:

[0151] Acquisition module 411 is used to acquire reflected light signals from optical fibers, wherein the reflected light signals are formed by injecting the injected signal into the optical fiber through the optical sensing communication terminal according to the uplink communication method of optical sensing communication described above, and the acquisition is performed using the demodulation component of the optical sensing communication base station.

[0152] In this embodiment, the acquisition module 411 can be used to perform... Figure 4 For a detailed description of the acquisition module 411, please refer to the description of step S210 shown.

[0153] The photoelectric conversion module 412 is used to perform photoelectric conversion on the reflected light signal to obtain an electrical signal;

[0154] In this embodiment, the photoelectric conversion module 412 can be used to perform... Figure 4 For a detailed description of the photoelectric conversion module 412, please refer to the description of step S220 shown.

[0155] The demodulation and decoding module 413 is used to demodulate and decode the electrical signal to obtain decoded data;

[0156] In this embodiment, the demodulation / decoding module 413 can be used to perform... Figure 4 For a detailed description of the demodulation and decoding module 413, please refer to the description of step S230 shown.

[0157] The sensing electrical signal acquisition module 414 is used to acquire the sensing electrical signal collected by the optical sensing communication terminal based on the decoded data.

[0158] In this embodiment, the sensing electrical signal acquisition module 414 can be used to perform... Figure 4 For a detailed description of the sensing electrical signal acquisition module 414, see step S240 shown below. For a detailed description of step S240, please refer to the description of step S240.

[0159] This application also provides an electronic device, the structure of which is as follows: Figure 8 As shown, the electronic device includes a memory 511, a processor 512, a communication module 513, and an input / output interface 514, etc. Optionally, the memory 511, the processor 512, the communication module 513, and the input / output interface 514 can be connected and communicate with each other through a bus 515.

[0160] The memory 511 is used to store one or more computer programs and to transfer the code of the computer programs to the processor 512; when the one or more computer programs are executed by the processor 512, an uplink communication method for optical sensing communication according to an embodiment of this application is implemented.

[0161] Optionally, the electronic device can be connected to a network via communication module 513 to exchange data with other devices, such as terminals or servers, through communication over the network. The electronic device can be various forms of digital computers, exemplarily such as desktop computers, servers, workbenches, mainframes, or other types of computers. The electronic device can also be various forms of mobile terminals, exemplarily such as smartphones, tablets, wearable devices (such as helmets, glasses, watches, etc.), and other similar mobile terminals.

[0162] Optionally, the electronic device can connect to desired input / output devices, such as a keyboard or display device, via the input / output interface 514. The electronic device itself may have a display device, and other display devices can also be connected externally via the input / output interface 514. Optionally, a storage device, such as a hard disk, can also be connected via the input / output interface 514 to store data from the electronic device, read data from the storage device, or store data from the storage device in the memory 511. It is understood that the input / output interface 514 can be a wired interface or a wireless interface. Depending on the actual application scenario, the device connected to the input / output interface 514 can be a component of the electronic device or an external device connected to the electronic device when needed.

[0163] Optionally, the memory 511 may be a volatile memory and / or a non-volatile memory. The volatile memory may be a random access memory, etc., and the non-volatile memory may be a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, or a flash memory, etc.

[0164] Optionally, the computer program stored in the memory 511 can be divided into one or more modules, which are stored in the memory 511 and executed by the processor 512 to perform the method provided in this embodiment. The one or more modules can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in the electronic device.

[0165] Optionally, the processor 512 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 512 include, but are not limited to, a central processing unit, a graphics processing unit, a digital signal processor, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, and can also be any suitable controller, microcontroller, processor, etc. The processor 512 executes the various methods and processes of this embodiment, exemplarily, such as an uplink communication method for optical sensing communication according to an embodiment of this application.

[0166] Optionally, the bus 515 may include a path for transmitting information. Depending on its function, the bus 515 may be classified as an address bus, a data bus, a control bus, etc.

[0167] In an optional implementation, this application embodiment also provides a computer storage medium storing a computer program thereon, which, when executed by a computer, enables the computer to perform the methods described in the above method embodiments. Part or all of the computer program can be loaded and / or installed on the memory 511 of an electronic device. When the computer program is executed by the processor 512, one or more steps of an uplink communication method for optical sensing communication according to an embodiment of this application can be performed.

[0168] Optionally, the computer-readable storage medium may be a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc.

[0169] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. An uplink communication method for optical sensing communication, characterized in that, Applied to optical sensing communication terminals, the method includes: Collect sensor electrical signals; The sensing electrical signal is encoded to obtain encoded data; the encoded data contains several encoded symbols; Each encoded symbol of the encoded data is used to obtain its corresponding modulation frequency according to a preset frequency-amplitude modulation table. The modulation amplitude level pairs are used as sub-injection signals, and all the sub-injection signals are aggregated to form an injection signal; wherein the frequency amplitude modulation table includes several preset modulation frequencies, several preset modulation amplitude levels, and several encoded symbols, and each modulation frequency corresponds to several modulation amplitude levels to form several modulation frequencies. Modulation amplitude level pairs, where each coded symbol corresponds to one modulation frequency. Modulation amplitude level pair; The optical fiber is continuously vibrated for a preset duration according to each sub-injection signal in the injection signal, so as to transmit the injection signal based on the optical fiber. The preset vibration duration is obtained based on a preset fast Fourier transform window.

2. The method according to claim 1, characterized in that, The process of encoding the sensing electrical signal to obtain encoded data includes: The sensing electrical signal is converted from analog to digital to obtain several level values; The aforementioned level values ​​are encoded according to a preset encoding table to obtain encoded data containing several encoding symbols. The encoding table contains several preset quantization level values ​​and several preset encoding symbols, and each quantization level value corresponds to one encoding symbol.

3. The method according to claim 1, characterized in that, The preset vibration duration is obtained based on a preset fast Fourier transform window, including: The sampling rate of the demodulation component is obtained. The demodulation component is used to connect to the optical fiber and receive and demodulate the reflected light signal of the optical fiber. Preset window sampling number; The Fast Fourier Transform window is pre-set according to the number of window samples and the sampling rate; The size of the Fast Fourier Transform window is used as the preset vibration duration.

4. An uplink communication method for optical sensing communication, characterized in that, Applied to optical sensing communication base stations, the method includes: Acquire the reflected light signal from the optical fiber, wherein the reflected light signal is transmitted through the optical sensing communication terminal according to claim 1. The uplink communication method of optical sensing communication according to any one of the claims 3 is formed by injecting the injected signal into an optical fiber, and the acquisition is performed using the demodulation component of the optical sensing communication base station; The reflected light signal is converted into an electrical signal through photoelectric conversion. The electrical signal is demodulated and decoded to obtain decoded data; The sensor electrical signal collected by the optical sensing communication terminal is obtained based on the decoded data.

5. An uplink communication system for optical sensing communication, characterized in that, The system, applied to optical sensing communication terminals, includes: Electrical signal acquisition module, used to acquire sensor electrical signals; The encoded data acquisition module is used to encode the sensing electrical signal to obtain encoded data; the encoded data includes several encoded symbols; The injection signal acquisition module is used to obtain the corresponding modulation frequency for each encoded symbol of the encoded data according to a preset frequency amplitude modulation table. The modulation amplitude level pairs are used as sub-injection signals, and all the sub-injection signals are aggregated to form an injection signal; wherein the frequency amplitude modulation table includes several preset modulation frequencies, several preset modulation amplitude levels, and several encoded symbols, and each modulation frequency corresponds to several modulation amplitude levels to form several modulation frequencies. Modulation amplitude level pairs, where each coded symbol corresponds to one modulation frequency. Modulation amplitude level pair; The transmission module is used to continuously vibrate the optical fiber for a preset vibration duration according to each sub-injection signal in the injection signal in order to transmit the injection signal based on the optical fiber. The preset vibration duration is obtained based on a preset fast Fourier transform window.

6. The system according to claim 5, characterized in that, The encoded data acquisition module is specifically used for: The sensing electrical signal is converted from analog to digital to obtain several level values; The aforementioned level values ​​are encoded according to a preset encoding table to obtain encoded data containing several encoding symbols. The encoding table contains several preset quantization level values ​​and several preset encoding symbols, and each quantization level value corresponds to one encoding symbol.

7. The system according to claim 5, characterized in that, The transmission module is specifically used for: The sampling rate of the demodulation component is obtained. The demodulation component is used to connect to the optical fiber and receive and demodulate the reflected light signal of the optical fiber. Preset window sampling number; The Fast Fourier Transform window is pre-set according to the number of window samples and the sampling rate; The size of the Fast Fourier Transform window is used as the preset vibration duration.

8. An uplink communication system for optical sensing communication, characterized in that, The system, applied to an optical sensing communication base station, includes: The acquisition module is used to acquire the reflected light signal from the optical fiber, wherein the reflected light signal is transmitted through the optical sensing communication terminal according to claim 1. The uplink communication method of optical sensing communication according to any one of the claims 3 is formed by injecting the injected signal into an optical fiber, and the acquisition is performed using the demodulation component of the optical sensing communication base station; A photoelectric conversion module is used to convert the reflected light signal into an electrical signal through photoelectric conversion. The demodulation and decoding module is used to demodulate and decode the electrical signal to obtain decoded data; The sensing electrical signal acquisition module is used to acquire the sensing electrical signal collected by the optical sensing communication terminal based on the decoded data.

9. An electronic device, characterized in that, include: Memory, used to store one or more computer programs; A processor, when the one or more computer programs are executed by the processor, implements the functionality of claim 1.

4. An uplink communication method for optical sensing communication as described in any one of the claims.

10. A computer-readable storage medium storing computer instructions that cause a processor to perform, when executed, claim 1.

4. An uplink communication method for optical sensing communication as described in any one of the claims.

Images