Cable temperature monitoring method and device, electronic equipment and storage medium

Abstract

The invention provides a cable temperature monitoring method and device, electronic equipment and a storage medium, and relates to the technical field of detection. A sensing optical cable arranged along a cable laying path is adopted as a monitoring medium, an optical pulse signal is injected into the sensing optical cable, and a backscattering light signal is received; and then temperature information is calculated according to the intensity relation of different frequency components in the backscattered light signal, the position of a temperature abnormal point is determined based on the light transmission time difference, the temperature and position information is analyzed in real time, and alarm is triggered and positioning data is output when an alarm condition is met. The problems that in the prior art, due to the fact that a point-type sensor cannot achieve continuous coverage, a monitoring blind area is caused, a quasi-distributed system cannot achieve continuous monitoring and high-precision positioning at the same time, cost is high, and real-time linkage alarming and positioning output cannot be achieved can be solved, and continuous and high-precision monitoring and positioning of the cable temperature are achieved. And meanwhile, the technical effects of real-time alarm of abnormal temperature, effective prevention of accidents and improvement of operation and maintenance efficiency are achieved.

Description

Technical Field

[0001] This disclosure relates to the field of detection technology, and in particular to a cable temperature monitoring method and apparatus, electronic equipment and storage medium. Background Technology

[0002] Cable trenches and cable trays serve as critical channels for the dense deployment of cables in power systems. To prevent localized overheating and fires caused by cable overload and insulation aging, effective monitoring of cable temperature is essential. Existing monitoring systems primarily rely on point sensors and quasi-distributed systems, but both have significant drawbacks: point sensors require extensive deployment to cover long-distance cables, resulting in complex and costly wiring, blind spots, susceptibility to strong electromagnetic interference, and insufficient durability in humid and corrosive environments; fiber optic grating systems suffer from cross-sensitivity issues, requiring additional compensation algorithms, and high deployment density significantly increases engineering costs, while positioning accuracy is insufficient to meet sub-meter requirements. These shortcomings prevent existing technologies from achieving continuous monitoring and high-precision positioning, leading to a high system failure rate, posing safety hazards, reducing maintenance efficiency, and failing to meet the needs of intelligent operation and maintenance in power systems. Summary of the Invention

[0003] This disclosure provides a cable temperature monitoring method and apparatus, electronic device, and storage medium. Its main objective is to at least partially address one of the technical problems in the related art.

[0004] According to a first aspect of this disclosure, a cable temperature monitoring method is provided, comprising: Based on the sensing optical cable laid along the cable laying path, an optical pulse signal is injected into the sensing optical cable and its backscattered light signal is received. Temperature information is calculated based on the intensity relationship of different frequency components in the backscattered light signal, and the location of temperature anomalies is determined based on the time difference of light transmission. The temperature and location information are analyzed in real time, and an alarm is triggered and the location data is output when the preset alarm conditions are met.

[0005] Optionally, the deployment of the sensing optical cable includes: using an armored optical cable with flame-retardant, corrosion-resistant and tensile strength properties, and laying it on the surface of the cable in a bonding manner.

[0006] Optionally, the step of calculating the temperature information based on the intensity relationship of different frequency components in the backscattered light signal includes: The temperature value is obtained by extracting the temperature-sensitive anti-Stokes light signal and the temperature-insensitive Stokes light signal, and calculating the intensity ratio of the two.

[0007] Optionally, determining the location of the temperature anomaly point based on the optical transmission time difference includes: The physical distance between the anomaly point and the signal injection end is calculated based on the time difference between the emission and reception of the backscattered light of the optical pulse and the speed of light in the optical fiber.

[0008] Optionally, the preset alarm conditions include at least one of the following: the temperature exceeds a set threshold, the temperature difference between adjacent monitoring points exceeds a set range, and the temperature rise rate per unit time exceeds a set rate.

[0009] Optional, also includes: The alarm signal and location data are transmitted to an external monitoring system or fire alarm linkage device through a communication interface to initiate corresponding control operations.

[0010] According to a second aspect of this disclosure, a cable temperature monitoring device is provided, comprising: An injection unit is used to inject optical pulse signals into a sensing optical cable laid along the cable laying path and to receive its backscattered light signals. The determining unit is used to calculate temperature information based on the intensity relationship of different frequency components in the backscattered light signal, and to determine the location of the temperature anomaly point based on the light transmission time difference. The analysis unit is used to perform real-time analysis of the temperature and location information, trigger an alarm and output location data when preset alarm conditions are met.

[0011] Optionally, the deployment of the sensing optical cable includes: using an armored optical cable with flame-retardant, corrosion-resistant and tensile strength properties, and laying it on the surface of the cable in a bonding manner.

[0012] Optionally, the determining unit is also used for: The temperature value is obtained by extracting the temperature-sensitive anti-Stokes light signal and the temperature-insensitive Stokes light signal, and calculating the intensity ratio of the two.

[0013] Optionally, the determining unit is also used for: The physical distance between the anomaly point and the signal injection end is calculated based on the time difference between the emission and reception of the backscattered light of the optical pulse and the speed of light in the optical fiber.

[0014] Optionally, the preset alarm conditions include at least one of the following: the temperature exceeds a set threshold, the temperature difference between adjacent monitoring points exceeds a set range, and the temperature rise rate per unit time exceeds a set rate.

[0015] Optional, also includes: The transmission unit is used to transmit the alarm signal and positioning data to an external monitoring system or fire alarm linkage device through a communication interface to initiate corresponding control operations.

[0016] According to a third aspect of this disclosure, an electronic device is provided, comprising: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method described in the first aspect above.

[0017] According to a fourth aspect of this disclosure, a non-transitory computer-readable storage medium is provided storing computer instructions, wherein the computer instructions are configured to cause the computer to perform the method described in the first aspect above.

[0018] According to a fifth aspect of this disclosure, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0019] The cable temperature monitoring method, device, electronic equipment, and storage medium disclosed herein utilize a sensing optical cable laid along the cable laying path as the monitoring medium. It injects optical pulse signals into the cable and receives backscattered light signals. Temperature information is calculated based on the intensity relationship of different frequency components in the backscattered light signal, and the location of temperature anomalies is determined based on the time difference of light transmission. Furthermore, it analyzes the temperature and location information in real time and triggers an alarm and outputs location data when alarm conditions are met. Therefore, it solves the problems in existing technologies, such as blind spots caused by the inability of point sensors to achieve continuous coverage, the difficulty and high cost of quasi-distributed systems in balancing continuous monitoring and high-precision positioning, and the inability to link alarms and location outputs in real time. This achieves continuous, high-precision monitoring and positioning of cable temperature, while simultaneously enabling real-time alarms for temperature anomalies, effectively preventing accidents and improving maintenance efficiency.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0021] The accompanying drawings are provided to better understand this solution and do not constitute a limitation of this disclosure. Wherein: Figure 1 A schematic flowchart illustrating a cable temperature monitoring method provided in this embodiment of the disclosure; Figure 2 This is a schematic diagram of the structure of a cable temperature monitoring device provided in an embodiment of the present disclosure; Figure 3 A schematic block diagram of an example electronic device provided for embodiments of this disclosure. Detailed Implementation

[0022] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0023] The cable temperature monitoring method, apparatus, electronic device, and storage medium of this disclosure are described below with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic flowchart of a cable temperature monitoring method provided in an embodiment of the present disclosure.

[0025] like Figure 1 As shown, the method includes the following steps: Step 101: Based on the sensing optical cable laid along the cable laying path, inject optical pulse signals into the sensing optical cable and receive its backscattered light signals.

[0026] In the embodiments of this disclosure, in the cable temperature monitoring scenario, to achieve effective sensing of the cable's operating temperature, it is first necessary to construct a sensing foundation and signal interaction mechanism adapted to the cable layout: based on a sensing optical cable laid along the cable laying path, the sensing optical cable can cover the area to be monitored along the extension direction of the cable, forming a sensing link matching the spatial distribution of the cable; subsequently, an optical pulse signal is injected into the sensing optical cable. During transmission within the optical cable, this optical pulse signal interacts with the optical cable medium, generating a backscattered light signal carrying information about the cable's state along the route. Simultaneously, this backscattered light signal is collected and received, providing raw signal support for subsequent acquisition of cable-related monitoring data. As one implementation method, the sensing optical cable can be a type with flame-retardant and corrosion-resistant properties, and the injected optical pulse signal can be a laser pulse of a specific wavelength to better adapt to the complex environment of cable trenches or cable trays.

[0027] By laying sensing optical cables along the cable laying path, the monitoring range is ensured to be completely consistent with the cable extension direction, fundamentally avoiding the monitoring blind spot problem caused by the discrete deployment of traditional point sensors. At the same time, by utilizing the transmission characteristics of optical pulse signals and backscattered light signals, an electromagnetic interference-resistant signal carrier is provided for the subsequent calculation of monitoring data, effectively improving the continuity and environmental adaptability of cable temperature monitoring.

[0028] Step 102: Calculate the temperature information based on the intensity relationship of different frequency components in the backscattered light signal, and determine the location of the temperature anomaly point based on the light transmission time difference.

[0029] In the embodiments of this disclosure, after acquiring the backscattered light signal generated during the transmission of the sensing optical cable, the temperature information at corresponding locations along the sensing optical cable is calculated by analyzing the intensity relationships between the different frequency components of the signal and the inherent correlation between the intensity changes of each frequency component and temperature, thereby achieving distributed sensing of cable temperature. Simultaneously, based on the transmission time difference between the light pulse signal injected into the sensing optical cable and the received backscattered light signal, combined with the transmission characteristics of light in the sensing optical cable, the specific location of the temperature anomaly point along the sensing optical cable is calculated, providing spatial coordinates for subsequent accurate location of cable temperature faults. As one implementation method, the different frequency components in the backscattered light signal can specifically be anti-Stokes light and Stokes light; the temperature is calculated using the intensity ratio of the two, and the location can be determined by combining the speed of light in a vacuum and the refractive index of the optical cable to improve the accuracy of temperature calculation and location.

[0030] By calculating the temperature through the intensity relationship of different frequency components, the accuracy of temperature measurement is ensured, avoiding the accuracy deviation caused by environmental interference in traditional temperature measurement methods. Based on the optical transmission time difference to determine the location, the precise spatial positioning of temperature anomalies is realized, solving the problem that traditional monitoring is unable to quickly locate the fault location, and laying the foundation for efficient troubleshooting of cable temperature faults.

[0031] Step 103: Perform real-time analysis on the temperature and location information, trigger an alarm and output location data when the preset alarm conditions are met.

[0032] In the embodiments of this disclosure, after completing the calculation of cable temperature information and determining the location of temperature anomalies, the acquired temperature information and corresponding location information need to be analyzed and processed synchronously and dynamically in real time to ensure that abnormal situations related to the temperature status and spatial location along the cable can be captured in a timely manner. The preset alarm conditions must be set based on core parameters for safe cable operation (such as safe temperature thresholds and allowable temperature rise rates). When the real-time analysis results show that the temperature information reaches or exceeds the preset alarm conditions, an alarm mechanism is immediately triggered, and the location data corresponding to the temperature anomaly is output, achieving coordinated feedback between temperature anomaly events and specific locations, providing a clear target for subsequent operation and maintenance. As one implementation method, the preset alarm conditions can be subdivided into three levels: constant temperature alarm, differential temperature alarm, and temperature rise rate alarm. The output location data can be transmitted to the monitoring software platform via an Ethernet interface and presented in the form of a combination of temperature distribution curves and location markers.

[0033] Real-time analysis of temperature and location information ensures timely detection of cable temperature anomalies, preventing the risk from escalating due to delayed detection. The synchronous output of alarm and location data directly solves the pain point of "knowing the anomaly but finding the location" in traditional monitoring, significantly improving the efficiency of cable fault diagnosis and providing strong support for safe cable operation and rapid maintenance.

[0034] The cable temperature monitoring method disclosed herein uses a sensing optical cable laid along the cable laying path as the monitoring medium, injects optical pulse signals into it and receives backscattered light signals, then calculates temperature information based on the intensity relationship of different frequency components in the backscattered light signals, determines the location of temperature anomalies based on the time difference of light transmission, and analyzes temperature and location information in real time, triggering alarms and outputting location data when alarm conditions are met. Therefore, it can solve the problems in the prior art where point sensors cannot achieve continuous coverage leading to monitoring blind spots, quasi-distributed systems are difficult to balance continuous monitoring and high-precision positioning and are costly, and cannot link alarms and location outputs in real time. It achieves continuous and high-precision monitoring and positioning of cable temperature, while realizing real-time alarms for temperature anomalies, effectively preventing accidents and improving operation and maintenance efficiency.

[0035] As a specific embodiment of this disclosure, based on the basic scheme, the deployment of the sensing optical cable is further defined as follows: using an armored optical cable with flame-retardant, corrosion-resistant and tensile strength properties, and laying it on the surface of the cable in a bonding manner.

[0036] Specifically, when laying the sensing optical cable, an armored optical cable with flame-retardant, corrosion-resistant, and tensile strength properties is selected. The sheath of this optical cable is made of flame-retardant polyolefin material, which can effectively prevent the spread of flames and meet the fire protection requirements that may exist in cable trenches and cable trays. The armor layer of the optical cable is made of 304 stainless steel tape, which is wrapped around the outside of the optical fiber through a longitudinal wrapping process. This can not only resist the corrosion of the optical fiber by moisture and corrosive gases in the cable trench, but also enhance the overall tensile strength of the optical cable, preventing the optical cable from breaking due to external pulling during laying or long-term operation. In terms of laying operation, the armored optical cable is laid on the cable surface by bonding. Specifically, the optical cable is fixed along the length of the cable with high-temperature resistant insulating tape, so that the optical cable is tightly bonded to the cable surface without obvious gaps, ensuring that the temperature of the cable surface can be quickly and accurately transferred to the sensing optical fiber inside the optical cable.

[0037] The flame-retardant, corrosion-resistant, and tensile properties of armored optical cables enable them to stably adapt to the complex environments of cable trenches and cable trays, which are often damp, corrosive, and subject to mechanical stress, thus extending the service life of the optical cables. Furthermore, the way the optical cables are laid in close contact with the surface of the cable eliminates gaps that hinder temperature transfer, ensuring the timeliness and accuracy of temperature transmission from the cable to the sensing optical fiber and preventing subsequent temperature monitoring results from being affected by lags or deviations in temperature transmission.

[0038] As a specific embodiment of this disclosure, based on the basic scheme, the step of calculating the temperature information based on the intensity relationship of different frequency components in the backscattered light signal is further defined as follows: extracting the temperature-sensitive anti-Stokes light signal and the temperature-insensitive Stokes light signal, and obtaining the temperature value by calculating the intensity ratio of the two.

[0039] Specifically, when calculating temperature information based on backscattered light signals, the received backscattered light signals are first separated by a wavelength division multiplexer (WDM) in the system. This WDM can accurately extract the temperature-sensitive anti-Stokes light signal and the temperature-insensitive Stokes light signal based on the different wavelength characteristics of anti-Stokes and Stokes light (e.g., the anti-Stokes light wavelength is slightly shorter than the incident laser wavelength, while the Stokes light wavelength is slightly longer than the incident laser wavelength). Subsequently, the extracted two light signals are transmitted to a high-sensitivity photodetector (e.g., an APD avalanche diode). This detector converts the light signals into corresponding electrical signals and outputs them to a high-speed data acquisition card for signal sampling and quantization. Finally, the signal processing unit in the system (e.g., a DSP chip) calls a preset temperature calculation algorithm to calculate the intensity ratio of the quantized anti-Stokes and Stokes light signals. This intensity ratio is then combined with a pre-calibrated "intensity ratio-temperature" correlation curve or mathematical model to convert the intensity ratio into a specific temperature value, thus completing the temperature information calculation.

[0040] By extracting the anti-Stokes light and Stokes light and calculating their intensity ratio to determine the temperature, the influence of common interference factors such as the attenuation of the optical pulse during optical cable transmission and the loss of the optical cable itself on the intensity of a single optical signal can be effectively offset, significantly improving the accuracy of temperature calculation. At the same time, using the temperature-insensitive Stokes light as a reference standard can avoid the interference of external factors such as ambient light and optical pulse power fluctuations on the temperature measurement results, ensuring the stability and reliability of temperature information calculation.

[0041] As a specific embodiment of this disclosure, based on the basic scheme, the determination of the location of the temperature anomaly point based on the optical transmission time difference is further defined, including: calculating the physical distance between the anomaly point and the signal injection end based on the time difference between the emission and reception of the backscattered light of the optical pulse and the speed of light in the optical fiber.

[0042] Specifically, when determining the location of temperature anomalies based on the time difference of light transmission, the high-speed timing module within the temperature measurement host first precisely records the initial moment when the light pulse is injected into the sensing optical cable from the transmitter, and the moment when the system receives the backscattered light signal generated after the light pulse is scattered by the optical cable medium. The difference between the two is the time difference from the transmission to the reception of the light pulse. Simultaneously, the inherent parameters of the sensing optical cable—the fiber refractive index (e.g., the refractive index of multimode fiber is typically around 1.46)—are pre-obtained, and the constant of the speed of light in a vacuum (approximately 3 × 10^8) is determined. Combining the physical characteristic that the speed of light in an optical fiber is the ratio of the speed of light in a vacuum to the refractive index of the optical fiber, the above time difference, the speed of light in a vacuum, and the refractive index of the optical fiber are substituted into the preset position calculation model (i.e., physical distance L=(c×t) / (2×n), where L is the physical distance between the anomaly point and the signal injection end, c is the speed of light in a vacuum, t is the time difference, and n is the refractive index of the optical fiber). Finally, the system's signal processing unit performs real-time calculations on the calculation process and outputs the specific physical distance of the temperature anomaly point relative to the signal injection end, thereby completing the determination of the location of the temperature anomaly point.

[0043] By introducing the inherent parameters of the refractive index of optical fiber and the speed of light in a vacuum, and combining them with the precisely recorded time difference of light transmission for physical distance calculation, the interference of light transmission loss in optical cables on location determination can be effectively offset, significantly improving the accuracy of locating temperature anomaly points. At the same time, the calculation is based on a clear physical formula, eliminating the need for additional complex calibration procedures, ensuring the stability and efficiency of the location determination process, and meeting the sub-meter level positioning requirements of critical parts such as cable joints.

[0044] As a specific implementation of this disclosure, based on the basic scheme, the preset alarm conditions are further defined to include at least one of the following: the temperature exceeds a set threshold, the temperature difference between adjacent monitoring points exceeds a set range, and the temperature rise rate per unit time exceeds a set rate.

[0045] Specifically, when setting preset alarm conditions, it is necessary to combine the technical specifications for safe cable operation with actual operation and maintenance needs, and configure specific parameters and set judgment logic for various alarm conditions: For the condition of "temperature exceeding the set threshold", the temperature threshold can be set to 90℃ according to the cable insulation material (such as cross-linked polyethylene cable) and rated operating temperature. When the system analyzes temperature information in real time, if the temperature data of a certain monitoring location exceeds 90℃ for 3 seconds (to avoid false alarms due to instantaneous fluctuations), it is determined that the alarm condition is met; For the condition of "temperature difference between adjacent monitoring points exceeds the set range", the monitoring points along the sensing optical cable are first divided at 1-meter intervals, and set... The system sets the temperature difference range at 5℃. It compares the temperature values ​​of two adjacent monitoring points in real time. If the absolute value of the difference between the two exceeds 5℃, the alarm condition is met. For the condition of "temperature rise rate exceeding the set rate per unit time", the set unit time is 1 minute and the temperature rise rate threshold is 10℃ / min. The system continuously collects temperature data of the same monitoring point in two adjacent 1-minute intervals and calculates the ratio of temperature change to time (i.e., temperature rise rate). If the ratio exceeds 10℃ / min, the alarm condition is met. During real-time analysis, the system triggers the alarm mechanism as long as any one of the above three conditions is met.

[0046] By setting three alarm conditions—temperature threshold, temperature difference range between adjacent points, and temperature rise rate—and supporting at least one trigger, this system can promptly capture common faults such as continuous overheating of a single point in the cable, detect potential problems with abnormal temperature differences in local areas, and provide early warnings of emergency situations with rapid temperature rise. It comprehensively covers different abnormal temperature scenarios in cable operation, effectively avoids missed fault reports caused by a single alarm condition, and significantly improves the comprehensiveness and timeliness of cable temperature anomaly early warning.

[0047] As a specific implementation of this disclosure, based on the basic solution, the embodiment of this disclosure further includes: transmitting the alarm signal and positioning data to an external monitoring system or fire-fighting linkage device through a communication interface to initiate corresponding control operations.

[0048] Specifically, firstly, an Ethernet interface (such as an RJ45 interface) and an RS232 serial interface are configured as communication links to connect to external monitoring systems (such as the integrated monitoring platform of a power operation and maintenance center) or fire-fighting linkage devices (such as gas extinguishing controllers in cable trenches). When the system determines that preset alarm conditions are met and generates an alarm signal and location data, the built-in communication module first integrates the alarm signal (including the classification identifiers for warning, alarm, and emergency alarms) and the location data (including the physical distance from the temperature anomaly point to the signal injection end and the corresponding cable laying section number) into a standardized data frame conforming to industrial communication standards, and then processes it according to the Modbus protocol. The data frames are encoded to ensure they are recognizable by external devices. Then, the appropriate interface is selected to transmit data based on the type of external device: if connected to an external monitoring system, the encoded data is sent to the monitoring platform in real time via an Ethernet interface at a transmission rate of 100Mbps; if connected to a fire alarm linkage device, data is transmitted via an RS232 interface at a baud rate of 9600bps. Upon receiving the data, the external monitoring system can immediately display the alarm level, location of abnormal points, and corresponding cable information. Upon receiving the data, the fire alarm linkage device initiates corresponding control operations based on the alarm level, such as triggering the pre-start procedure and audible / visual warnings of the fire extinguishing device in case of an emergency alarm.

[0049] The communication interface enables the transmission of alarm signals and location data to external systems, breaking down information barriers between the monitoring system and the operation and maintenance and fire protection systems, and avoiding response delays caused by isolated monitoring data. Based on the received data, the external system can quickly initiate control operations, which can significantly shorten the time from the detection of temperature anomalies to the implementation of prevention and control measures, further reducing the risk of fire caused by cable overheating and improving the overall safety and prevention capabilities of the power system.

[0050] It should be noted that the embodiments of this disclosure may include multiple steps. For ease of description, these steps are numbered, but these numbers are not a limitation on the execution time slots or execution order between the steps; these steps can be implemented in any order, and the embodiments of this disclosure do not limit this.

[0051] Corresponding to the cable temperature monitoring method described above, this disclosure also proposes a cable temperature monitoring device. Since the device embodiments of this disclosure correspond to the method embodiments described above, details not disclosed in the device embodiments can be referred to the method embodiments described above, and will not be repeated here.

[0052] Figure 2 This is a schematic diagram of the structure of a cable temperature monitoring device provided in an embodiment of the present disclosure, as shown below. Figure 2 As shown, it includes: The injection unit 21 is used to inject optical pulse signals into the sensing optical cable laid along the cable laying path and to receive its backscattered light signals. The determining unit 22 is used to calculate temperature information based on the intensity relationship of different frequency components in the backscattered light signal, and to determine the location of the temperature anomaly point based on the light transmission time difference. The analysis unit 23 is used to perform real-time analysis of the temperature information and location information, trigger an alarm and output location data when the preset alarm conditions are met.

[0053] The cable temperature monitoring device disclosed herein uses a sensing optical cable laid along the cable laying path as the monitoring medium, injects light pulse signals into it and receives backscattered light signals, then calculates temperature information based on the intensity relationship of different frequency components in the backscattered light signal, determines the location of temperature anomalies based on the light transmission time difference, and analyzes temperature and location information in real time, triggering an alarm and outputting location data when alarm conditions are met. Therefore, it can solve the problems in the prior art where point sensors cannot achieve continuous coverage leading to monitoring blind spots, quasi-distributed systems are difficult to balance continuous monitoring and high-precision positioning and are costly, and cannot link alarms and location outputs in real time. It achieves the technical effect of continuous and high-precision monitoring and positioning of cable temperature, while realizing real-time alarm for temperature anomalies, effectively preventing accidents and improving operation and maintenance efficiency.

[0054] Furthermore, in one possible implementation of this embodiment, the deployment of the sensing optical cable includes: using an armored optical cable with flame-retardant, corrosion-resistant and tensile strength properties, and laying it on the cable surface in a bonding manner.

[0055] Furthermore, in one possible implementation of this embodiment, the determining unit 22 is further configured to: The temperature value is obtained by extracting the temperature-sensitive anti-Stokes light signal and the temperature-insensitive Stokes light signal, and calculating the intensity ratio of the two.

[0056] Furthermore, in one possible implementation of this embodiment, the determining unit 22 is further configured to: The physical distance between the anomaly point and the signal injection end is calculated based on the time difference between the emission and reception of the backscattered light of the optical pulse and the speed of light in the optical fiber.

[0057] Furthermore, in one possible implementation of this embodiment, the preset alarm conditions include at least one of the following: the temperature exceeds a set threshold, the temperature difference between adjacent monitoring points exceeds a set range, and the temperature rise rate per unit time exceeds a set rate.

[0058] Furthermore, in one possible implementation of this embodiment, such as Figure 2 As shown, it also includes: The transmission unit 24 is used to transmit the alarm signal and positioning data to an external monitoring system or fire-fighting linkage device through a communication interface to initiate corresponding control operations.

[0059] It should be noted that the foregoing explanation of the method embodiments also applies to the apparatus of this embodiment, and the principle is the same, so it is not limited in this embodiment.

[0060] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0061] Figure 3 A schematic block diagram of an example electronic device 300 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0062] like Figure 3 As shown, the electronic device 300 includes a computing unit 301, which can perform various appropriate actions and processes based on a computer program stored in ROM (Read-Only Memory) 302 or a computer program loaded from storage unit 308 into RAM (Random Access Memory) 303. The RAM 303 may also store various programs and data required for the operation of the electronic device 300. The computing unit 301, ROM 302, and RAM 303 are interconnected via a bus 304. An I / O (Input / Output) interface 305 is also connected to the bus 304.

[0063] Multiple components in electronic device 300 are connected to I / O interface 305, including: input unit 306, such as keyboard, mouse, etc.; output unit 307, such as various types of displays, speakers, etc.; storage unit 308, such as disk, optical disk, etc.; and communication unit 309, such as network card, modem, wireless transceiver, etc. Communication unit 309 allows electronic device 300 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0064] The computing unit 301 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 301 include, but are not limited to, CPUs (Central Processing Units), GPUs (Graphics Processing Units), various special-purpose AI (Artificial Intelligence) computing chips, various computing units running machine learning model algorithms, DSPs (Digital Signal Processors), and any suitable processor, controller, microcontroller, etc. The computing unit 301 performs the various methods and processes described above, such as the cable temperature monitoring method. For example, in some embodiments, the cable temperature monitoring method may be implemented as a computer software program tangibly contained in a machine-readable medium, such as storage unit 308. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 300 via ROM 302 and / or communication unit 309. When the computer program is loaded into RAM 303 and executed by the computing unit 301, one or more steps of the methods described above may be performed. Alternatively, in other embodiments, the computing unit 301 may be configured to perform the aforementioned cable temperature monitoring method by any other suitable means (e.g., by means of firmware).

[0065] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application-Specific Standard Products), SOCs (System-on-Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0066] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0067] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, RAM, ROM, EPROM (Electrically Programmable Read-Only Memory) or flash memory, optical fiber, CD-ROM (Compact Disc Read-Only Memory), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0068] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (Cathode-Ray Tube) or LCD (Liquid Crystal Display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0069] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include LANs (Local Area Networks), WANs (Wide Area Networks), the Internet, and blockchain networks.

[0070] Computer systems can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. A server can be a cloud server, also known as a cloud computing server or cloud host, a hosting product within the cloud computing service system that addresses the shortcomings of traditional physical hosts and VPS (Virtual Private Server) services, such as high management difficulty and weak business scalability. Servers can also be servers for distributed systems or servers incorporating blockchain technology.

[0071] It's important to note that artificial intelligence (AI) is the study of enabling computers to simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, and planning). It encompasses both hardware and software technologies. AI hardware technologies generally include sensors, dedicated AI chips, cloud computing, distributed storage, and big data processing. AI software technologies primarily include computer vision, speech recognition, natural language processing, machine learning / deep learning, big data processing, and knowledge graph technologies.

[0072] The various numerical designations such as "first," "second," etc., used in this disclosure are merely for ease of description and are not intended to limit the scope of the embodiments of this disclosure, nor do they indicate a sequential order.

[0073] At least one of the features described in this disclosure can also be described as one or more, and multiple features can be two, three, four or more, and this disclosure does not impose any limitations. In the embodiments of this disclosure, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no sequential order or size order among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0074] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method of cable temperature monitoring, characterized by, The method comprises the following steps: injecting an optical pulse signal into a sensing optical cable laid along a cable laying path and receiving a backscattered light signal of the optical pulse signal; resolving temperature information according to the intensity relationship of different frequency components in the backscattered light signal, and determining the position of a temperature abnormal point based on the light transmission time difference; real-time analyzing the temperature information and the position information, triggering an alarm and outputting positioning data when a preset alarm condition is met.

2. The method of claim 1, wherein, The sensing optical cable laid along the cable laying path comprises a armored structure optical cable with fire-retardant, corrosion-resistant and tensile properties, and is laid on the surface of the cable in a fitting manner.

3. The method of claim 1, wherein, The step of resolving temperature information according to the intensity relationship of different frequency components in the backscattered light signal comprises the following steps: extracting anti-Stokes light signals sensitive to temperature and Stokes light signals insensitive to temperature, and obtaining a temperature value by calculating the intensity ratio of the two signals.

4. The method of claim 1, wherein, The step of determining the position of a temperature abnormal point based on the light transmission time difference comprises the following steps: calculating the physical distance between the abnormal point and the signal injection end according to the time difference between the light pulse from emission to the reception of the backscattered light and the speed of light in the optical fiber.

5. The method of claim 1, wherein, The preset alarm condition comprises at least one of the following: the temperature exceeds a set threshold, the temperature difference between adjacent monitoring points exceeds a set range, and the temperature rise rate in a unit time exceeds a set rate.

6. The method of claim 1, wherein, The method further comprises the following steps: transmitting the alarm signal and the positioning data to an external monitoring system or a fire linkage device through a communication interface to start a corresponding control operation.

7. A cable temperature monitoring device, characterised in that, The method comprises the following steps: injecting an optical pulse signal into a sensing optical cable laid along a cable laying path and receiving a backscattered light signal of the optical pulse signal; resolving temperature information according to the intensity relationship of different frequency components in the backscattered light signal, and determining the position of a temperature abnormal point based on the light transmission time difference; real-time analyzing the temperature information and the position information, triggering an alarm and outputting positioning data when a preset alarm condition is met.

8. An electronic device, comprising: The method comprises the following steps: at least one processor; and a memory connected in communication with the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-6.

9. A non-transitory computer-readable storage medium having stored thereon computer instructions, wherein, The computer instructions are used to enable the computer to perform the method of any one of claims 1-6.

10. A computer program product, characterised in that, The computer program, when executed by a processor, implements the method of any one of claims 1-6.

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