Method for monitoring coastal water area geological disasters by using optical cable

Abstract

The invention discloses a method for monitoring geological disasters in a coastal water area by using an optical cable, which comprises the following steps: when the geological disasters occur in the coastal water area of an area under administration, using an optical cable sensing technology and an optical fiber as a sensing medium which is sensitive to the change of an external environment; environmental parameter changes are monitored through the scattering effect of optical signals in the optical cable; the method comprises the following steps: laying optical cables along a bank, burying the optical cables in the earth surface or underground of a coastal water area, covering a potential geological disaster area, deploying an optical fiber sensor system, collecting change signals of displacement, vibration, strain and the like of the optical cables in the coastal water area in real time, and supervising field optical fiber equipment in real time through a background optical transmission management system; real-time monitoring of coastal water area geological disasters is considered, and the geological condition of the jurisdiction is dynamically sensed; by combining the optical cable sensing technology with big data, Internet of Things and artificial intelligence analysis, the monitoring efficiency and early warning precision of coastal water area geological disasters can be significantly improved, and a powerful guarantee is provided for channel safety.

Description

Technical Field

[0001] The present invention belongs to the field of interaction between geological disaster monitoring and optical cable sensing technology, and specifically designs a method for monitoring geological disasters in coastal waters using an optical cable. Background Art

[0002] The Three Gorges shipping section is the core area of the Yangtze River's golden waterway. It is not only the lifeline of domestic inland waterway shipping but also an important transportation hub connecting the east-west economic belts, playing a crucial role in the country's energy transportation, economic development, and ecological security. However, the geological conditions in this area are complex, and geological disasters such as landslides frequently occur along the coast, threatening the safety of the waterway and potentially causing shipping interruptions and even ecological damage. To ensure the navigational safety and economic operation of the Three Gorges shipping section, it is particularly crucial to establish a complete geological disaster prevention and warning system. To achieve geological disaster prevention and warning in the jurisdiction area, the competent agency has invested a large amount of manpower and material resources. However, the monitoring work mainly relies on manual observation and recording, with limited monitoring scope, poor real-time performance, and difficulty in covering hidden areas. The quantitative indicators for geological disaster warning are not rich, and the accuracy is not high. By multiplexing the optical cables deployed in coastal waters as sensors for geological disaster monitoring and combining sensing technology and big data analysis, the geological change trend along the coast can be grasped in real time. Provide early warnings before disasters occur, reduce the casualties and economic losses caused by geological disasters, and ensure the efficient operation of the golden waterway; The existing coastal geological monitoring technologies have the following defects: 1. Lack of real-time monitoring means for geological data before the occurrence of geological disasters; Currently, the main means of geological monitoring by the competent unit is still mainly manual monitoring. Supervisory personnel need to go to the site for manual observation and recording. This visual-based observation method has insufficient monitoring indicators, low accuracy, and poor timeliness. At the same time, during the monitoring process, geological disasters may occur at the site, and there are certain safety hazards for monitoring personnel and equipment.

[0003] 2. Lack of means for real-time warning of geological disasters in the coastal waters of the jurisdiction area. Currently, the competent unit has deployed geological disaster monitoring cameras in most areas of the jurisdiction, but there are still hidden areas that are difficult to cover within the jurisdiction. The staff of the monitoring center use the means of "manual supervision + on-site images" to issue early warning notifications when geological disasters occur. Although this means can conduct early warning research and judgment on geological disasters, it lacks real-time performance in geological disaster early warning through manual means and is prone to misjudgment, missed judgment, and delayed judgment, lacking more effective means for geological disaster early warning.

[0004] Therefore, it is necessary to design a method for monitoring geological disasters in coastal waters using an optical cable to solve the above problems. Summary of the Invention

[0005] To solve the above problems, the present invention proposes a method for monitoring geological disasters in coastal waters using optical cables, aiming to solve the problems in the prior art that there is a lack of real-time monitoring means for geological data before geological disasters occur in the coastal areas of waterways, and a lack of means for real-time early warning of geological disasters in the coastal waters under the jurisdiction; it has the characteristics of significantly improving the monitoring efficiency and early warning accuracy of geological disasters in coastal waters by combining optical cable sensing technology with big data, the Internet of Things, and artificial intelligence analysis, and providing strong guarantee for waterway safety.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: A method for monitoring geological disasters in coastal waters using optical cables, comprising the following steps: S1, obtaining the geological information collected by the optical cable and uploading it to the monitoring center; S2, monitoring the displacement and strain sub-item data information of the optical fiber in the geological disaster occurrence section, and the background system processes and analyzes the sub-item data to form comprehensive index data, and executes step S3; S3, executing a determination process, specifically: The system determines whether the comprehensive index exceeds the early warning threshold: If the comprehensive index does not exceed the early warning threshold, then execute step S4; If the comprehensive index exceeds the early warning index, then execute step S7; S4, the system determines whether the sub-item index exceeds the early warning threshold; If the sub-item index does not exceed the early warning threshold, it is regarded as a risk-free or low-risk situation, and no alarm is triggered; If the sub-item index exceeds the early warning threshold, then execute step S5; S5, the system triggers an alarm, and the monitoring center conducts online and offline monitoring to investigate potential safety hazards, and executes step S6; S6, when the system obtains the information that the on-site potential safety hazards have been rectified, then execute step S10; S7, the system triggers an emergency early warning and emergency response, pushes alarm information to the safety department of the competent agency, and executes step S8; S8, the system transmits the signal to the maritime and transportation departments, notifies personnel to evacuate on-site and implements area control, and executes step S9; S9, the system transmits a signal to notify the multi-department joint action to manage the disaster site, and after obtaining the information that the on-site management is completed, execute step S10; S10, the system reports post-event information to the safety department of the competent unit, and executes step S11; S11, the system determines whether each monitoring index is lower than the early warning threshold; If the system determines that there is a monitoring index higher than the early warning threshold, then return to execute step S1; If the system determines that all monitoring indices are lower than the warning threshold, the process ends.

[0007] Preferably, in step S2, the specific method for the background system to process and analyze the sub-item data to form the comprehensive index data is as follows: Based on the Brillouin frequency shift formula and the strain-displacement relationship formula, comprehensively judge the occurrence and degree of geological disasters; the Brillouin frequency shift formula is expressed as: ; Wherein, is the Brillouin frequency shift, is the effective refractive index of the optical fiber, is the acoustic wave velocity in the optical fiber, is the velocity of the incident light, usually taken as the speed of light in vacuum; for silica optical fiber, usually take = 1.46, = 5945 m / s, When the incident light wavelength = 1550 nm, the Brillouin frequency shift is about 11.2 GHz; by measuring the change in Brillouin frequency shift, the strain on the optical fiber is deduced, and the displacement of the geological body caused by the landslide is judged. The strain-displacement relationship is expressed as: ; In the formula, represents the strain of the optical fiber; represents the change in the length of the optical fiber; L represents the original length of the optical fiber; The landslide displacement formula is expressed as: ; In the formula, represents the actual displacement in the landslide direction; represents the change in the length of the optical fiber; represents the angle between the optical fiber and the landslide direction; When the optical fiber is buried in the geological body, the landslide will cause a change in the length of the optical fiber. Using the strain-displacement relationship, the landslide displacement can be calculated; The calculation method of the comprehensive index is expressed as: ; In the formula, S represents the comprehensive warning index, , and are the weight coefficients of each sub-item data, and A, B, C, etc. represent each sub-item data.

[0008] The present invention has the following beneficial effects: The present invention utilizes fiber optic sensing technology. Fiber optic sensing technology can achieve continuous monitoring along the entire length of the optical cable, with a positioning accuracy reaching the meter level, and can real-time sense the strain and displacement changes before a landslide, enhancing the early warning ability; significantly increasing the coverage area of geological disaster monitoring, enabling the fiber optic cable to promptly sense the geological activities in the initial stage of geological disasters and providing preparation time for disaster prevention; enabling 24-hour uninterrupted monitoring, replacing traditional manual monitoring methods, reducing labor input and long-term operation costs, and reducing human misjudgment or monitoring blind spots; multiplexing the optical cable deployed in coastal waters as a sensor for geological disaster monitoring, improving the utilization rate of equipment functions and reducing economic costs; through timely early warning, it is possible to evacuate residents and construction workers in the affected area in advance to avoid casualties; early warning of landslide risks to avoid river blockages, debris flows, or ecosystem damage caused by disasters and reducing secondary damage to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic flowchart of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Example 1: As Figure 1 shown, a method for monitoring geological disasters in coastal waters using an optical cable includes the following steps: S1. Obtain the geological information collected by the optical cable and upload it to the monitoring center; S2. The fiber optic monitoring at the geological disaster occurrence section obtains the displacement and strain sub-item data information, and the background system processes and analyzes the sub-item data to form comprehensive index data, and then executes step S3; S3. Execute the determination process, specifically: The system determines whether the comprehensive index exceeds the warning threshold: If the comprehensive index does not exceed the warning threshold, then execute step S4; If the comprehensive index exceeds the warning index, then execute step S7; S4. The system determines whether the sub-item index exceeds the warning threshold; If the sub-item index does not exceed the warning threshold, it is regarded as a risk-free or low-risk situation and no alarm is triggered; If the sub-item index exceeds the warning threshold, then execute step S5; S5. The system triggers an alarm, and the monitoring center conducts online and offline monitoring to check for potential problems, and then executes step S6; S6. If the system obtains the information that the on-site potential problems have been rectified, then execute step S10; S7. The system triggers an emergency warning and emergency response, pushes the alarm information to the safety department of the competent agency, and then executes step S8; At S8, the system transmits the signal to the maritime and transportation departments, notifies the personnel to conduct on-site evacuation and implement area control, and executes step S9; At S9, the system transmits a signal to notify the multi-department linkage of the information on the treatment of the disaster site. After obtaining the information that the on-site treatment is completed, step S10 is executed; At S10, the system reports the post-event information to the safety department of the competent unit and executes step S11; At S11, the system determines whether each monitoring index is lower than the warning threshold; If the system determines that there is a monitoring index higher than the warning threshold, it returns to execute step S1; If the system determines that each monitoring index is lower than the warning threshold, the process ends.

[0011] Embodiment 2: The specific method for the background system to process and analyze the sub-item data to form the comprehensive index data is as follows: Through the Brillouin frequency shift formula and the strain-displacement relationship formula, comprehensively judge the occurrence and degree of geological disasters; the Brillouin frequency shift formula is expressed as: ; Among them, is the Brillouin frequency shift, is the effective refractive index of the optical fiber, is the acoustic wave velocity in the optical fiber, is the velocity of the incident light, usually taken as the velocity of light in vacuum; for silica optical fiber, usually take = 1.46, = 5945 m / s, The incident light wavelength = 1550 nm, then the Brillouin frequency shift is about 11.2 GHz; by measuring the change in the Brillouin frequency shift, the strain suffered by the optical fiber is deduced, and the displacement of the geological body caused by the landslide is judged. The strain-displacement relationship is expressed as: ; In the formula, represents the strain of the optical fiber; represents the change in the length of the optical fiber; L represents the original length of the optical fiber; The landslide displacement formula is expressed as: ; In the formula, represents the actual displacement in the landslide direction; represents the change in the length of the optical fiber; represents the angle between the optical fiber and the landslide direction; When the optical fiber is buried in the geological body, the landslide will cause a change in the length of the optical fiber. The landslide displacement can be calculated using the strain-displacement relationship; The comprehensive index calculation method is expressed as: ; In the formula, S represents the comprehensive early warning index, , and are the weight coefficients of each sub-item data, and A, B, C, etc. represent each sub-item data.

Claims

1. A method for monitoring geological disasters in coastal waters using optical cables, characterized in that: The following steps are involved: S1, obtains geological information collected by the optical cable and uploads it to the monitoring center; S2: The optical fiber monitors the displacement and strain data of the disaster-affected area. The backend system processes and analyzes the data to form comprehensive index data. S3, execute the determination process.

2. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 1 is characterized in that: In step S3, the determination process includes: S301, the system determines whether the comprehensive index exceeds the warning threshold: If the comprehensive index does not exceed the warning threshold, execute step S302; If the comprehensive index exceeds the warning index, step S305 is executed.

3. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 2, characterized in that: Step S302 includes: The system determines whether the sub-index exceeds the warning threshold; If the sub-index does not exceed the warning threshold, it is considered as a no-risk or low-risk situation and no alarm is triggered; If the sub-item index exceeds the warning threshold, step S303 is executed.

4. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 3 is characterized in that: Step S303 includes: The system triggers an alarm, and the monitoring center implements online and offline monitoring to check for hidden dangers and problems, and executes step S304.

5. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 4, characterized in that: Step S304 includes: When the system obtains information that the hidden dangers on site have been rectified, step S308 is executed.

6. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 2, characterized in that: Step S305 includes: The system triggers emergency warning and emergency response, pushes alarm information to the security department of the competent authority, and executes step S306.

7. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 6, characterized in that: Step S306 includes: The system transmits the signal to the maritime and transportation departments, notifies personnel to evacuate the site and implement regional control, and executes step S307.

8. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 7, characterized in that: Step S307 includes: The system transmits a signal to notify multiple departments to jointly manage the disaster site. After obtaining the information that the on-site management is completed, step S308 is executed.

9. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 8, characterized in that: Step S308 includes: The system reports the post-event information to the security department of the competent unit and executes step S309; S309: The system determines whether each monitoring index is lower than the warning threshold: If the system determines that the monitoring index is higher than the warning threshold, it returns to step S1; If the system determines that all monitoring indices are lower than the warning threshold, the process ends.

10. The method for emergency protection of ship lock linkage operation based on mooring force detection of ships passing through the lock according to claim 1, characterized in that: In step S2, the background system processes and analyzes the sub-item data to form the comprehensive index data in the following specific method: The occurrence and extent of geological disasters can be comprehensively judged through the Brillouin frequency shift formula and the strain-displacement relationship formula; the Brillouin frequency shift formula is expressed as: ； in, is the Brillouin frequency shift, is the effective refractive index of the optical fiber, is the speed of sound waves in the optical fiber, is the speed of the incident light; the strain on the optical fiber is inferred by measuring the change in the Brillouin frequency shift, and the displacement of the geological body caused by the landslide is determined. The relationship between strain and displacement is expressed as: ； In the formula, represents the strain of the optical fiber; Indicates the change in optical fiber length; L indicates the original length of the optical fiber; The landslide displacement formula is expressed as: ； In the formula, Indicates the actual displacement in the direction of the landslide; Indicates the change in fiber length; represents the angle between the optical fiber and the landslide direction; When optical fiber is buried in a geological body, landslides can cause changes in the length of the optical fiber, and the landslide displacement can be calculated using the relationship between strain and displacement; The calculation method of the comprehensive index is expressed as: ； S represents the comprehensive early warning index, , and It is the weight coefficient of each sub-item data, and A, B, C, etc. represent each sub-item data.

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