A tunnel fire protection pipeline monitoring method, system and equipment

The detection of leakage events and areas of tunnel fire pipes through distributed fiber and data acquisition sensors is solved, and the problem of lack of leakage area detection in the prior art is solved, and hierarchical alarms and more accurate maintenance preparation are achieved.

CN118856242BActive Publication Date: 2025-03-25JINAN GOLDENWORLD HIGHWAY INDUSTRY DEVELOPMENT CO LTD
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Patent Information

Application Number
CN202410861104.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-28
Publication Date
2025-03-25
Estimated Expiration
2044-06-28

AI Technical Summary

Technical Problem

Existing tunnel fire pipeline monitoring technologies mostly focus on the detection of leakage locations, lack real-time detection of leakage areas, and cannot generate solutions of different levels of urgency based on the size of leakage areas.

Method used

The distributed optical fiber detects leakage events in the fire pipeline, and combines the data acquisition sensor to collect vibration signals and pressure data, calculates the signal amplitude change value and pressure change value, determines the leakage area, and activates the hierarchical alarm mechanism.

Benefits of technology

Real-time detection of tunnel fire pipe leakage incidents and accurate assessment of leakage area are achieved, and alarm plans of varying degrees are generated based on the size of the leakage area to help maintenance personnel prepare and deal with it in a timely manner.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a tunnel fire protection pipeline monitoring method, system and equipment, which belongs to the field of fire protection pipeline monitoring technology, and is used to solve the technical problems that the current tunnel fire protection monitoring is mainly aimed at detecting the leakage position of water supply pipelines, lacks a detection method for the leakage area, cannot know the leakage area of ​​the pipeline in real time, and cannot generate solutions of different urgency according to the size of the leakage area. The method includes: detecting a leakage event, determining the pipeline section where the leakage event is located; collecting a first vibration signal and a first pressure data within a first preset period; collecting a second vibration signal and a second pressure data within a second preset period; determining the signal amplitude change value between the first preset period and the second preset period according to the first vibration signal and the second vibration signal; determining the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data and the second pressure data; and issuing an alarm at a corresponding alarm level according to the leakage area.
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Description

Technical Field

[0001] The present invention relates to the technical field of fire protection pipeline monitoring, and in particular to a method, system and equipment for monitoring tunnel fire protection pipelines. Background Art

[0002] With the development of highway construction in mountainous areas and the increase in mileage, the number of long tunnels and extra-long tunnels is increasing, and the fire safety protection issues in long tunnels are gradually receiving attention. Compared with other sections of roads, tunnels are more closed and narrow, with fewer entrances and exits, and the entrances and exits of long tunnels and extra-long tunnels are far apart. Once a fire occurs, it will be very difficult to escape and rescue. Therefore, ensuring the integrity of tunnel fire-fighting facilities is a prerequisite for timely and effective fire fighting.

[0003] Firefighting pipes are pipes for transporting firefighting water and are also one of the important firefighting facilities in tunnels. The tunnel firefighting pipe network is long and has a large number of fire hydrant terminals, making operation and management difficult. Once a firefighting pipe bursts, a fire hydrant leaks or freezes, it often takes a lot of time to investigate, causing the water level in the tunnel firefighting high-level water tank to drop rapidly, and the water volume cannot reach the required fire duration, which poses certain safety hazards to the safe operation and fire handling of the tunnel.

[0004] At present, many solutions have been proposed for monitoring fire pipes in tunnels. Most of them focus on detecting the leakage position of fire pipes, but lack detection methods for the leakage area. It is impossible to know the leakage area of ​​the pipeline in real time, and thus it is impossible to generate solutions of different urgency according to the size of the leakage area. Maintenance personnel cannot know the extent of the leakage on site and cannot make corresponding preparations. The leakage area may be small, but the maintenance personnel bring a lot of extra maintenance equipment. It may also be that the leakage area is large, but the maintenance personnel do not know the on-site situation, do not bring enough maintenance equipment or fail to respond in time, which may easily lead to untimely leakage treatment or waste of manpower. Summary of the invention

[0005] The embodiments of the present invention provide a tunnel fire protection pipeline monitoring method, system and equipment for solving the following technical problems: the current tunnel fire protection monitoring mainly focuses on the leakage position detection of water supply pipelines, lacks a detection method for the leakage area, and cannot know the leakage area of ​​the pipeline in real time, and thus cannot generate solutions of different urgency levels according to the size of the leakage area.

[0006] The embodiment of the present invention adopts the following technical solutions:

[0007] On the one hand, an embodiment of the present invention provides a method for monitoring a tunnel fire protection pipeline, the method comprising:

[0008] Detect the leakage event of the current fire protection pipeline through distributed optical fiber and determine the pipeline section where the leakage event is located;

[0009] Starting the data acquisition sensor in the pipeline section to acquire a first vibration signal and a first pressure data within a first preset period; and acquiring a second vibration signal and a second pressure data within a second preset period;

[0010] Determine a signal amplitude change value of a first preset period and a second preset period according to the first vibration signal and the second vibration signal;

[0011] Determining a leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data, and the second pressure data;

[0012] According to the leakage area, a graded alarm mechanism is started to issue a leakage alarm at a corresponding alarm level.

[0013] In a feasible implementation, the current fire protection pipeline leakage event is detected through distributed optical fiber, and the pipeline section where the leakage event is located is determined, specifically including:

[0014] The leakage event is detected by sensing water outside the current fire-fighting pipeline through a distributed optical fiber axially distributed below the current fire-fighting pipeline;

[0015] According to the installation position of the fire hydrant, the current fire protection pipeline is divided into a plurality of pipeline sections, and each pipeline section is numbered;

[0016] According to the location where the leakage event is detected, the pipeline section where the leakage event is located and the corresponding number are determined.

[0017] In a feasible implementation manner, after detecting the leakage event of the current fire protection pipeline through the distributed optical fiber and determining the pipeline section where the leakage event is located, the method further includes:

[0018] The real-time temperature of each position of the current fire protection pipeline is sensed through the distributed optical fiber;

[0019] If the real-time temperature at any location is lower than the preset temperature threshold, the pipeline section number of the location is obtained;

[0020] The electric heating power source corresponding to the pipeline section number is started through the control system to heat the pipeline section to prevent the pipeline from freezing.

[0021] In a feasible implementation manner, starting the data acquisition sensor in the pipeline section to acquire a first vibration signal and a first pressure data within a first preset period; and acquiring a second vibration signal and a second pressure data within a second preset period, specifically includes:

[0022] When the leakage event is detected, a data collector in the pipeline section is started; wherein the data collector includes a vibration signal sensor and a pressure sensor;

[0023] In a first preset period, continuously collecting the first vibration signal through the vibration signal sensor;

[0024] At the start time and the end time of the first preset period, the first pressure data is collected respectively by the pressure sensor; wherein the first pressure data includes the start pressure data and the end pressure data within the first preset period;

[0025] In a second preset period, continuously collecting the second vibration signal through the vibration signal sensor;

[0026] At the start time and the end time of the second preset cycle, the second pressure data is respectively collected by the pressure sensor; wherein the second pressure data includes the start pressure data and the end pressure data within the second preset cycle.

[0027] In a feasible implementation manner, determining the signal amplitude change value of the first preset period and the second preset period according to the first vibration signal and the second vibration signal specifically includes:

[0028] Calculating a first average amplitude according to the first vibration signal within the first preset period;

[0029] Calculating a second average amplitude according to the second vibration signal within the second preset period;

[0030] The signal amplitude variation values ​​within two preset periods are calculated according to the first average amplitude and the second average amplitude.

[0031] In a feasible implementation manner, determining the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data, and the second pressure data specifically includes:

[0032] Calculating a first pressure change value within a first preset period according to the starting pressure data and the ending pressure data in the first pressure data;

[0033] Calculating a second pressure change value within a second preset period according to the starting pressure data and the ending pressure data in the second pressure data;

[0034] The leakage area is determined according to the signal amplitude change value, the first pressure change value, and the second pressure change value.

[0035] In a feasible implementation manner, determining the leakage area according to the signal amplitude change value, the first pressure change value, and the second pressure change value specifically includes:

[0036] according to The leakage area S is obtained; wherein ΔA is the signal amplitude change value, ΔP1 is the first pressure change value, and ΔP2 is the second pressure change value.

[0037] In a feasible implementation manner, according to the leakage area, a graded alarm mechanism is started to issue a leakage alarm at a corresponding alarm level, specifically including:

[0038] Comparing the leakage area with the multi-level preset leakage area thresholds, and determining the pipeline leakage criticality level according to the comparison result;

[0039] According to the pipeline leakage criticality level, the corresponding alarm level is determined, and the corresponding alarm plan is called to issue a leakage alarm.

[0040] On the other hand, an embodiment of the present invention further provides a tunnel fire protection pipeline monitoring system, the system comprising:

[0041] A leakage event detection module, used to detect leakage events in the current fire protection pipeline through distributed optical fibers, and determine the pipeline section where the leakage event is located;

[0042] A leakage area detection module is used to start the data acquisition sensor in the pipeline section, collect a first vibration signal and a first pressure data within a first preset period; and collect a second vibration signal and a second pressure data within a second preset period; determine the signal amplitude change value between the first preset period and the second preset period according to the first vibration signal and the second vibration signal; determine the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data and the second pressure data;

[0043] The leakage event alarm module is used to start the graded alarm mechanism according to the leakage area and issue a leakage alarm at a corresponding alarm level.

[0044] Finally, an embodiment of the present invention further provides a tunnel fire protection pipeline monitoring device, the device comprising:

[0045] at least one processor; and,

[0046] a memory communicatively connected to the at least one processor; wherein,

[0047] The memory stores instructions that can be executed by the at least one processor, so that the at least one processor can execute the tunnel fire protection pipeline monitoring method.

[0048] Compared with the prior art, the tunnel fire protection pipeline monitoring method provided by the embodiment of the present invention has the following beneficial effects:

[0049] The tunnel fire protection pipeline monitoring method provided by the present invention can not only detect leakage incidents occurring in fire protection pipelines in real time, but also obtain the leakage area on the current pipeline according to the pressure data and vibration signals at the same time, thereby generating alarm schemes of different degrees according to the size of the leakage area. If the leakage area is very small and the amount of water leakage is small, which does not affect the safety of the fire protection pipeline temporarily, then the alarm level can be lowered so that the maintenance personnel can complete the maintenance within a wider prescribed time. If the leakage area is large and needs to be handled immediately to ensure the safety of the fire protection pipeline, the alarm level will be raised to remind the maintenance personnel to go to the tunnel immediately for maintenance to quickly resolve the leakage incident. This setting allows the maintenance personnel to know the urgency of the leakage incident, so as to select the corresponding maintenance equipment and respond accordingly. On the premise of ensuring the safety of the pipeline, it can provide the maintenance personnel with more on-site data support so that they can make appropriate preparations. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0051] Figure 1 A flow chart of a tunnel fire protection pipeline monitoring method provided by an embodiment of the present invention;

[0052] Figure 2 A schematic diagram of the structure of a tunnel fire protection pipeline monitoring system provided by an embodiment of the present invention;

[0053] Figure 3 A schematic diagram of the structure of a tunnel fire protection pipeline monitoring device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0055] The embodiment of the present invention provides a method for monitoring a tunnel fire protection pipeline. Figure 1 As shown, the tunnel fire protection pipeline monitoring method specifically includes steps S101-S105:

[0056] S101. Detect leakage events in the current fire protection pipeline through distributed optical fibers, and determine the pipeline section where the leakage event is located.

[0057] Specifically, the distributed optical fiber axially distributed below the current fire-fighting pipeline senses the water outside the current fire-fighting pipeline, thereby detecting a leakage event. Then, according to the installation location of the fire hydrant, the current fire-fighting pipeline is divided into multiple pipeline sections, and each pipeline section is numbered.

[0058] Furthermore, according to the location where the leakage event is detected, the pipeline section where the leakage event is located and the corresponding number are determined.

[0059] As a feasible implementation method, the distributed optical fiber is axially pasted below the current fire-fighting pipe. Once a water leak occurs, water will flow downward along the outer wall of the pipe, come into contact with the distributed optical fiber, and react with the medium-sensitive substances on the surface of the optical fiber, causing the optical fiber output light intensity to decrease, driving the fiber grating to produce strain in the axial direction, and then changing the reflection wavelength of the fiber grating, thereby determining that a water leak has occurred here based on the change in the optical signal.

[0060] A fire hydrant is installed at a certain length of the water pipeline in the tunnel, so that the water pipeline of the entire tunnel is divided into multiple equal-length areas. The present invention divides the entire fire pipeline into multiple pipeline sections with the fire hydrant as the dividing point, and numbers each pipeline section according to the water delivery direction. After the distributed optical fiber detects a leakage event, the corresponding pipeline section number can be determined according to the detection position, so as to convey to the control system which section of the pipeline needs to be repaired.

[0061] As a feasible implementation method, the real-time temperature of each position of the current fire protection pipeline can also be sensed through distributed optical fiber. If the real-time temperature of any position is lower than the preset temperature threshold, the pipeline section number of the position is obtained. The electric heating power supply corresponding to the pipeline section number is started by the control system to heat the pipeline section to prevent the pipeline from freezing.

[0062] S102, start the data acquisition sensor in the pipeline section, collect the first vibration signal and the first pressure data within a first preset period; and collect the second vibration signal and the second pressure data within a second preset period.

[0063] Specifically, when a leakage event is detected, a data collector in the pipeline section is started; wherein the data collector includes a vibration signal sensor and a pressure sensor. Then, within a first preset period, the first vibration signal is continuously collected through the vibration signal sensor. Within a second preset period, the second vibration signal is continuously collected through the vibration signal sensor.

[0064] At the start time and the end time of the first preset cycle, the first pressure data is collected respectively by the pressure sensor; wherein the first pressure data includes the start pressure data and the end pressure data within the first preset cycle.

[0065] At the start time and the end time of the second preset period, the second pressure data is collected respectively by the pressure sensor; wherein the second pressure data includes the start pressure data and the end pressure data within the second preset period.

[0066] As a feasible implementation method, the present invention installs a vibration signal sensor and a pressure sensor in each pipeline section. According to experimental research, after a pipeline leaks, the amplitude of the vibration signal generated by the water pipe and the water pressure inside the water pipe will change accordingly, and the degree of change is related to the leakage area. This application uses these changes to propose a method for calculating the leakage area based on pressure change data and signal amplitude change data. First, it is necessary to collect vibration signals and pressure data within two consecutive cycles to provide data support for subsequent calculations. Here, it is only necessary to start the data acquisition equipment in the pipeline section where the leakage event is detected, which can save energy consumption of the monitoring system.

[0067] S103 , determining signal amplitude change values ​​of a first preset period and a second preset period according to the first vibration signal and the second vibration signal.

[0068] Specifically, the first average amplitude is calculated according to the first vibration signal in the first preset period, and the second average amplitude is calculated according to the second vibration signal in the second preset period.

[0069] Furthermore, the signal amplitude variation values ​​within two preset periods are calculated according to the first average amplitude and the second average amplitude.

[0070] As a feasible implementation method, the average values ​​of the amplitudes of the vibration signals collected within two preset periods are calculated respectively, and then the difference between the amplitude average values ​​corresponding to the two preset periods is calculated to obtain the signal amplitude change value within the two preset periods.

[0071] S104: Determine a leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data, and the second pressure data.

[0072] Specifically, the first pressure change value within the first preset period is calculated according to the starting pressure data and the ending pressure data in the first pressure data, and the second pressure change value within the second preset period is calculated according to the starting pressure data and the ending pressure data in the second pressure data.

[0073] As a feasible implementation, the first pressure change value is obtained by subtracting the starting pressure data from the ending pressure data in the first pressure data. Similarly, the second pressure change value is obtained by subtracting the starting pressure data from the ending pressure data in the second pressure data.

[0074] Further, determining the leakage area according to the signal amplitude change value, the first pressure change value and the second pressure change value specifically includes:

[0075] according to The leakage area S is obtained; wherein ΔA is the signal amplitude change value, ΔP1 is the first pressure change value, and ΔP2 is the second pressure change value.

[0076] This formula was derived after multiple experiments on the changes in signal amplitude and pressure under different leakage areas, and has been verified.

[0077] S105. According to the leakage area, a graded alarm mechanism is started to issue a leakage alarm at a corresponding alarm level.

[0078] Specifically, the leakage area is compared with the multi-level preset leakage area thresholds, and the pipeline leakage criticality level is determined based on the comparison result.

[0079] Furthermore, according to the critical level of pipeline leakage, the corresponding alarm level is determined, and the corresponding alarm plan is called to issue a leakage alarm.

[0080] As a feasible implementation method, if the leakage area is small and smaller than the minimum threshold, the alarm level is set to the lowest level, indicating that the leakage does not affect the safety of the fire protection pipeline for the time being, and the maintenance personnel are reminded to complete the maintenance within a relatively wide prescribed time. If the leakage area is large and larger than the maximum threshold, the alarm level is raised, indicating that the current situation is critical, and the maintenance personnel are reminded to immediately go to the tunnel with sufficient maintenance equipment for maintenance to quickly resolve the leakage incident.

[0081] In addition, the embodiment of the present invention also provides a tunnel fire protection pipeline monitoring system, such as Figure 2 As shown, the tunnel fire protection pipeline monitoring system 200 includes:

[0082] The leakage event detection module 210 is used to detect the leakage event of the current fire protection pipeline through the distributed optical fiber, and determine the pipeline section where the leakage event is located;

[0083] The leakage area detection module 220 is used to start the data acquisition sensor in the pipeline section, collect the first vibration signal and the first pressure data in a first preset period; and collect the second vibration signal and the second pressure data in a second preset period; determine the signal amplitude change value of the first preset period and the second preset period according to the first vibration signal and the second vibration signal; determine the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data and the second pressure data;

[0084] The leakage event alarm module 230 is used to start a graded alarm mechanism according to the leakage area and issue a leakage alarm at a corresponding alarm level.

[0085] In addition, the embodiment of the present invention also provides a tunnel fire protection pipeline monitoring device, such as Figure 3 As shown, the equipment specifically includes:

[0086] at least one processor; and a memory in communication with the at least one processor; wherein,

[0087] The memory stores instructions executable by at least one processor to enable the at least one processor to perform:

[0088] Detect the leakage event of the current fire protection pipeline through distributed optical fiber and determine the pipeline section where the leakage event is located;

[0089] Starting the data acquisition sensor in the pipeline section to acquire a first vibration signal and a first pressure data within a first preset period; and acquiring a second vibration signal and a second pressure data within a second preset period;

[0090] Determine a signal amplitude change value of a first preset period and a second preset period according to the first vibration signal and the second vibration signal;

[0091] Determining a leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data, and the second pressure data;

[0092] According to the leakage area, a graded alarm mechanism is started to issue a leakage alarm at a corresponding alarm level.

[0093] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0094] This specification may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. This specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0095] Each embodiment of the present invention is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0096] The above describes specific embodiments of the present invention. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0097] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring a tunnel fire protection pipeline, characterized in that: The method comprises: Detect the leakage event of the current fire protection pipeline through distributed optical fiber and determine the pipeline section where the leakage event is located; The data acquisition sensor in the pipeline section is started to acquire a first vibration signal and a first pressure data within a first preset period; and a second vibration signal and a second pressure data within a second preset period, specifically including: When the leakage event is detected, a data collector in the pipeline section is started; wherein the data collector includes a vibration signal sensor and a pressure sensor; In a first preset period, continuously collecting the first vibration signal through the vibration signal sensor; At the start time and the end time of the first preset period, the first pressure data is collected respectively by the pressure sensor; wherein the first pressure data includes the start pressure data and the end pressure data within the first preset period; In a second preset period, continuously collecting the second vibration signal through the vibration signal sensor; At the start time and the end time of the second preset period, the second pressure data is collected respectively by the pressure sensor; wherein the second pressure data includes the start pressure data and the end pressure data within the second preset period; Determining the signal amplitude change value of the first preset period and the second preset period according to the first vibration signal and the second vibration signal specifically includes: Calculating a first average amplitude according to the first vibration signal within the first preset period; Calculating a second average amplitude according to the second vibration signal within the second preset period; Calculating a signal amplitude change value within two preset periods according to the first average amplitude and the second average amplitude; Determining the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data, and the second pressure data specifically includes: Calculating a first pressure change value within a first preset period according to the starting pressure data and the ending pressure data in the first pressure data; Calculating a second pressure change value within a second preset period according to the starting pressure data and the ending pressure data in the second pressure data; Determining the leakage area according to the signal amplitude change value, the first pressure change value, and the second pressure change value specifically includes: according to , and the leakage area S is obtained; where, is the signal amplitude change value, is the first pressure change value, is the second pressure change value; According to the leakage area, a graded alarm mechanism is started to issue a leakage alarm at a corresponding alarm level.

2. A method for monitoring a tunnel fire protection pipeline according to claim 1, characterized in that: Through distributed optical fiber, the current fire protection pipeline leakage event is detected, and the pipeline section where the leakage event is located is determined, specifically including: The leakage event is detected by sensing water outside the current fire-fighting pipeline through a distributed optical fiber axially distributed below the current fire-fighting pipeline; According to the installation position of the fire hydrant, the current fire protection pipeline is divided into a plurality of pipeline sections, and each pipeline section is numbered; According to the location where the leakage event is detected, the pipeline section where the leakage event is located and the corresponding number are determined.

3. A method for monitoring a tunnel fire protection pipeline according to claim 2, characterized in that: After detecting the leakage event of the current fire protection pipeline through the distributed optical fiber and determining the pipeline section where the leakage event is located, the method further includes: The real-time temperature of each position of the current fire protection pipeline is sensed through the distributed optical fiber; If the real-time temperature at any location is lower than the preset temperature threshold, the pipeline section number of the location is obtained; The electric heating power source corresponding to the pipeline section number is started through the control system to heat the pipeline section to prevent the pipeline from freezing.

4. A method for monitoring a tunnel fire protection pipeline according to claim 1, characterized in that: According to the leakage area, a graded alarm mechanism is activated to issue a leakage alarm at a corresponding alarm level, specifically including: Comparing the leakage area with the multi-level preset leakage area thresholds, and determining the pipeline leakage criticality level according to the comparison result; According to the pipeline leakage criticality level, the corresponding alarm level is determined, and the corresponding alarm plan is called to issue a leakage alarm.

5. A tunnel fire protection pipeline monitoring system based on a tunnel fire protection pipeline monitoring method according to any one of claims 1 to 4, characterized in that: The system comprises: A leakage event detection module, used to detect leakage events in the current fire protection pipeline through distributed optical fibers, and determine the pipeline section where the leakage event is located; A leakage area detection module is used to start the data acquisition sensor in the pipeline section, collect a first vibration signal and a first pressure data within a first preset period; and collect a second vibration signal and a second pressure data within a second preset period; determine the signal amplitude change value between the first preset period and the second preset period according to the first vibration signal and the second vibration signal; determine the leakage area of ​​the leakage event according to the signal amplitude change value, the first pressure data and the second pressure data; The leakage event alarm module is used to start the graded alarm mechanism according to the leakage area and issue a leakage alarm at a corresponding alarm level.

6. A tunnel fire protection pipeline monitoring device, characterized in that: The device comprises: 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, so that the at least one processor can execute the tunnel fire protection pipeline monitoring method according to any one of claims 1-4.

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