Monitoring and alarming system for cable duct bank or small comprehensive pipe gallery

Abstract

The invention relates to the technical field of cable duct bank and small comprehensive pipe gallery monitoring, in particular to a cable duct bank or small comprehensive pipe gallery monitoring and alarming system. Comprising a system management platform, a data analysis device and a detection device, and the detection device is composed of a well lid opening and closing grating sensor, a liquid level grating sensor, a settlement monitoring grating sensor, a temperature monitoring grating sensor and the like. The data analysis device is connected with various detection devices arranged in a calandria working well or a small comprehensive pipe gallery through optical fibers, can read real-time data of the detection devices in real time, and uploads the data to the system management platform through a bus; therefore, the opening and closing state of the well lid in the working well, the temperature of the cable connector, the sedimentation of the working well and the water level state of the working well are monitored in real time, and real-time alarm is given for abnormal conditions. According to the invention, monitoring of the cable duct bank or the small comprehensive pipe gallery is realized by using the detection device.

Description

Technical Field

[0001] The present invention relates to the technical field of cable duct bank and small integrated pipe gallery monitoring, and particularly to a monitoring and alarm system for cable duct banks or small integrated pipe galleries. Background Art

[0002] With the acceleration of the urbanization process, cable duct banks and small integrated pipe galleries, as important carriers of urban underground pipelines, have continuously expanded in construction scale. However, due to the common characteristics of such facilities as narrow space and limited power supply conditions, existing monitoring and alarm technologies are difficult to be directly applied. Currently, most cable duct banks and small integrated pipe galleries are in a state of no real-time monitoring, relying only on manual inspections or simple mechanical monitoring devices, which have the following significant defects:

[0003] Existing technologies lack the ability to monitor key parameters such as the opening and closing state of manhole covers, the temperature of cable joints, the liquid level in manholes, and the civil engineering settlement in real time. For example, when a manhole cover is illegally opened or a cable joint overheats, it is difficult to detect and give an early warning in time, resulting in frequent accidents such as fires, waterlogging, and equipment damage, and prominent safety hazards. Existing monitoring means cannot accurately locate the fault point. For example, when the liquid level is abnormal or settlement occurs, maintenance personnel need to spend a lot of time checking the specific location, delaying the emergency handling efficiency. Most existing monitoring devices are single-function devices, which are difficult to integrate multi-parameter monitoring, and cannot flexibly expand the number of sensors or work in coordination with other management systems, making it difficult to meet the dynamically growing needs of urban pipe networks. Therefore, there is an urgent need for an integrated monitoring system that can monitor multiple parameters in real time and has the functions of fault location and intelligent alarm. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a monitoring and alarm system for cable duct banks or small integrated pipe galleries, which realizes the real-time monitoring of the manhole cover state, liquid level, settlement, and temperature through a grating-based sensor and passive transmission technology, and constructs an intelligent monitoring system with low cost, high reliability, and easy expansion in combination with a data analysis device and a system management platform.

[0005] In order to achieve the above object, the following technical solutions are specifically adopted:

[0006] A monitoring and alarm system for cable duct banks or small integrated pipe galleries, comprising:

[0007] A manhole cover opening and closing grating sensor for real-time monitoring of the opening and closing state of the manhole cover of the cable duct bank or small integrated pipe gallery;

[0008] A liquid level grating sensor for real-time monitoring of the liquid level in the manhole of the cable duct bank or the sump liquid level in the small integrated pipe gallery;

[0009] A settlement monitoring grating sensor for real-time monitoring of the civil engineering settlement of the cable duct bank manhole or the small integrated pipe gallery;

[0010] Temperature grating sensor, used for real-time monitoring of the temperature of power cable joints in cable ducts or small integrated pipe galleries;

[0011] Data analysis device, connected to the manhole cover opening and closing grating sensor, liquid level grating sensor, settlement monitoring grating sensor and temperature grating sensor through optical fibers, used for receiving and analyzing the data of each sensor and uploading it through the bus;

[0012] System management platform, receiving the data uploaded by the data analysis device, performing data analysis, anomaly judgment and alarm, and generating alarm information and countermeasures.

[0013] Furthermore, the manhole cover opening and closing grating sensor includes a top cap, a compression spring, a tray, a cantilever beam and a sensing grating; when the manhole cover is opened or closed, the top cap is stressed to drive the tray to move through the compression spring, and the tray lifts one side of the cantilever beam to deform the sensing grating, so as to judge the state of the manhole cover through the wavelength change.

[0014] Furthermore, the liquid level grating sensor includes a grating sensitive element, a liquid storage cylinder and a floating rod; the liquid storage cylinder is placed in the sump, and when the liquid level changes, the floating rod drives the force on the grating sensitive element to change, and the data analysis device calculates the liquid level height through the wavelength change.

[0015] Furthermore, the settlement monitoring grating sensor includes two levels connected by a liquid pipe, used for calculating the differential settlement difference through the grating wavelength change.

[0016] Furthermore, the temperature grating sensor includes a grating structure written by ultraviolet light into an optical fiber, which is used to obtain temperature information based on the principle that the grating wavelength is modulated by temperature.

[0017] Furthermore, the system management platform includes:

[0018] Including an information sharing module, used to connect to the operation and maintenance unit system through an industrial bus interface to realize the sharing of monitoring data, so that operation and maintenance personnel can obtain operation status information;

[0019] Fault prediction alarm and positioning module, used to monitor the temperature of cable joints, the state of manhole covers, water levels and settlements through various sensors to realize fault prediction, alarm and positioning;

[0020] Online diagnosis module, used to display the working status of sensors in real time and alarm the position of sensor open circuits;

[0021] Threshold setting alarm module, used to set the alarm threshold of sensors, trigger audible and visual alarms, display the fault position and notify relevant personnel when the monitoring data exceeds the threshold;

[0022] A data query and modification module for users to query monitoring data, modify monitoring point parameters, and combine map display and query of monitoring point details;

[0023] An expansion module for adding sensors or upgrading functional modules, integrating and collaborating with other relevant systems.

[0024] Furthermore, the operation method of the fault prediction, alarm and location module is as follows:

[0025] The temperature monitoring grating sensor real-time collects the temperature data of the cable joint, transmits the data to the data analysis device, and then the data analysis device uploads it to the system management platform;

[0026] The platform analyzes the continuously collected temperature data according to the preset temperature change trend. When the temperature change reaches the condition of predicting a fault, the fault prediction function is triggered;

[0027] Once the temperature of the cable joint exceeds the set alarm threshold, the fault prediction, alarm and location module generates an alarm message. At the same time, according to the sensor location information, it determines the overheating location and pushes the alarm message and location information to the monitoring interface for display.

[0028] Among them, the manhole cover opening and closing grating sensor, the liquid level grating sensor, and the settlement monitoring grating sensor collect corresponding data according to their respective monitoring principles. The data processing and alarm location process are the same as that of temperature monitoring.

[0029] Furthermore, the operation method of the threshold setting and alarm module is as follows:

[0030] Through the operation interface of the system management platform, upload the alarm threshold corresponding to each sensor;

[0031] The threshold setting and alarm module stores the thresholds of each sensor in the system database;

[0032] The monitoring data uploaded by the data analysis device is compared with the thresholds stored in the database in real time;

[0033] When the monitoring data exceeds the threshold, the audible and visual alarm device is triggered, and at the same time the fault location is displayed, and according to the pre-recorded contact information of relevant personnel, an alarm notification is sent through the automatic call system.

[0034] Correspondingly, the present invention also includes an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps of each module in the system management platform.

[0035] Correspondingly, the present invention also includes a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of each module in the system management platform are implemented.

[0036] The present invention has the following beneficial technical effects:

[0037] Based on grating sensing technology, the present invention realizes all-round real-time monitoring of the manhole cover status, water level, civil engineering settlement, and cable joint temperature through manhole cover opening and closing, liquid level, settlement, and temperature grating sensors, solving the problem of missing monitoring of key parameters in the prior art. The sensor does not require external power supply and only transmits signals through optical fibers, significantly reducing the construction and operation and maintenance costs, and is especially suitable for cable ducts or small integrated pipe galleries without stable power sources.

[0038] The fault prediction, alarm and positioning module of the system management platform can accurately locate the specific positions of overheating of cable joints, illegal opening of manhole covers, liquid level overlimit or settlement anomalies by analyzing sensor data and location information, and combined with the functions of sound and light alarm and automatic notification, greatly shortening the time for fault troubleshooting and disposal and effectively avoiding the expansion of accidents.

[0039] The threshold setting alarm module allows customizing alarm thresholds, comparing data in real time and triggering multi-level alarm notifications to ensure immediate response to abnormal situations; the online diagnosis module monitors the on-off status of sensors and optical fibers in real time, quickly locates transmission link faults, reduces the frequency of manual inspections, and reduces the complexity of operation and maintenance. Description of the Drawings

[0040] Figure 1 It is the architecture diagram of the cable duct or small integrated pipe gallery monitoring and alarm system in the present invention;

[0041] Figure 2 It is the structural schematic diagram of the manhole cover opening and closing grating sensor in the present invention;

[0042] Figure 3 It is the structural schematic diagram of the liquid level grating sensor in the present invention;

[0043] Figure 4 It is the structural schematic diagram of the settlement monitoring grating sensor in the present invention;

[0044] Figure 5 It is the structural schematic diagram of the temperature grating sensor in the present invention.

[0045] Numbers in the figures:

[0046] 1. Top cap; 2. Spring; 3. Tray; 4. Cantilever beam; 5. Fixed aluminum block; 6. Sensor housing; 7. Mounting bracket; 10. First upper cover; 20. Fastening piece; 30. Connecting rod; 40. Fixed ring; 50. Floating rod; 60. First transparent liquid storage cylinder; 70. Base; 80. Chassis; 100. Second upper cover; 200. Second transparent liquid storage cylinder; 300. Hook; 400. Floating cylinder; 500. Base; 600. Support bolt; 700. Mounting base plate; 800. Mounting base plate; 900. Locking nut; 1000. Breather pipe; 1100. Liquid pipe; 1200. Fiber optic connector.

[0047] 501. Optical cable; 502. Capillary glass tube; 503. Stainless steel tube; 504. Heat transfer oil; 505. Fiber Bragg grating; 506. Glue. Detailed implementation manner

[0048] To make the objectives, technical solutions and advantages of this embodiment clearer, the technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings in this embodiment. Obviously, the described embodiments are some but not all of the embodiments of this cable duct or small integrated pipe gallery monitoring and alarm system. The components of this embodiment usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0049] Please refer to Figure 1 , the cable duct or small integrated pipe gallery monitoring and alarm system of the present invention mainly consists of a system management platform, a data analysis device and a detection device. The system management platform and the data analysis device are usually arranged in the duct or small pipe gallery monitoring center. The data analysis device is connected to the detection device composed of a manhole cover opening and closing grating sensor, a liquid level grating sensor, a settlement monitoring grating sensor and a temperature grating sensor by means of optical cable fusion splicing. The optical cable is laid in the cable hole of the through duct or the self-use bridge of the small pipe gallery. The data analysis device has multi-channel characteristics, and the number of channels can be flexibly configured according to the number of sensors required by the system.

[0050] Please refer to Figure 2 , the manhole cover opening and closing grating sensor consists of a top cap 1, a spring 2, a tray 3, a cantilever beam 4, a fixed aluminum block 5, a sensor housing 6 and a mounting bracket 7. During actual installation, the manhole cover opening and closing grating sensor is installed at a specific position on the manhole cover. After installation, debugging is carried out to adjust the installation position and parameters of the sensor to ensure that when the manhole cover makes an opening or closing action, the manhole cover can accurately press the top cap 1. When the manhole cover is opened or closed, the top cap 1 is stressed, and the tray 3 is driven to move up and down by pressing the spring 2. The movement of the tray 3 will lift one side of the cantilever beam 4, and the sensing grating installed on this side of the cantilever beam 4 will deform, resulting in a change in wavelength. The monitoring center detects the change in the wavelength of the sensing grating, and can accurately determine the opening and closing state of the manhole cover, realizing real-time monitoring of the manhole cover state.

[0051] Please refer to Figure 3 , the liquid level grating sensor is composed of components such as an upper cover 10, a fixing part 20, a connecting rod 30, a fixing ring 40, a floating rod 50, a transparent liquid storage cylinder 60, a base 70, and a chassis 80. During installation, place the liquid storage cylinder 60 of the liquid level grating sensor at the sump in the pipe trench manhole or small integrated pipe gallery. The liquid storage cylinder 60 is fixedly installed on the side wall of the sump through the fixing part 20, the connecting rod 30, and the fixing ring 40. After installation, debug components such as the floating rod 50 and the grating sensitive element to ensure that the floating rod 50 can move up and down smoothly when the liquid level changes, and the buoyancy change can be accurately transmitted to the grating sensitive element. Under normal conditions, the liquid storage cylinder 60 is placed in the sump. When water enters the sump, the water enters the interior through the lower inlet of the liquid storage cylinder 60, and the liquid level in the liquid storage cylinder 60 is the same as the liquid level in the sump. A fiber optic grating sensor is provided at the top of the floating rod 50. As the liquid level changes, the buoyancy force on the floating rod 50 changes, and the force acting on the grating sensitive element changes. The data analysis device calculates the liquid level height based on the wavelength change corresponding to the force change sensed by the grating sensitive element, realizing the precise monitoring of the liquid level in the sump.

[0052] Please refer to Figure 4 , the settlement monitoring grating sensor is composed of components such as an upper cover 100, a transparent liquid storage cylinder 200, a hook 300, a floating cylinder 400, a base 500, a support bolt 600, an installation base plate 700, an installation base plate 800, a locking nut 900, a breather pipe 1000, a liquid passing pipe 1100, and an optical fiber connector 1200. When installing the settlement monitoring grating sensor in the pipe trench manhole or small integrated pipe gallery, ensure the levelness of the two spirit levels and the tightness of the connection of the liquid passing pipe 1100. After installation, adjust the initial liquid level of the spirit level and the parameters of the grating sensor. Based on the principle of communicating vessels, the liquid levels in the two spirit levels connected by the liquid passing pipe 1100 are interrelated and balanced. When the pipe trench manhole or small integrated pipe gallery settles and causes a liquid level change, the buoyancy force on the floating cylinder 400 changes, which is transmitted to the grating sensitive element and causes a change in the grating wavelength. By monitoring the change in the grating wavelength, the liquid level situation can be known. The difference in the liquid levels in the two floating cylinders represents the value of the uneven settlement difference generated at the positions where the two floating cylinders are located, thereby realizing the effective monitoring of the settlement situation of the pipe trench manhole or small integrated pipe gallery.

[0053] Please refer to Figure 5, The temperature fiber grating sensor is composed of components such as an optical cable 501, a capillary glass tube 502, a stainless steel tube 503, heat-conducting oil 504, a fiber grating 505, and glue 506. The fiber grating temperature sensor encapsulates the fiber grating 505 in the capillary glass tube 502. One end is fixed with glue and the other end is freely relaxed in the glass tube. The capillary glass tube 502 is further protected by the stainless steel tube 503 on the outside, and high-temperature heat-conducting oil 504 is filled in the middle to improve the temperature transfer rate. During installation, the temperature monitoring fiber grating sensor is installed at the cable joint or other parts that need to monitor temperature to ensure good thermal conduction contact between the sensor and the object to be measured. After installation, the sensor is calibrated so that the system can accurately analyze the temperature value according to the change of the grating wavelength, reaching the standard of temperature measurement accuracy of ±1°C and temperature resolution of 0.1°C. Based on the physical principle that the wavelength of the grating is modulated by temperature and changes, the accurate monitoring of the temperature of parts such as cable joints is realized by analyzing the wavelength change information.

[0054] The system management platform has multiple functions. In terms of information sharing, it is connected to the systems of cable duct or small integrated pipe gallery operation and maintenance units through an industrial bus interface. The host installed in the monitoring center and the networked computers can receive and automatically display the corresponding alarm prompt information in real time, facilitating the operation and maintenance personnel to timely grasp the operation status. For the functions of fault prediction alarm and positioning, the temperature monitoring fiber grating sensor monitors the temperature of the cable joint in real time, and the system analyzes the data according to the preset temperature change trend to predict overheating faults in advance. When an overheating fault occurs at the cable joint, the system quickly alarms and accurately locates the overheating position, and at the same time saves historical data to provide a basis for accident analysis. The fiber grating switch sensor monitors the well cover status, the well liquid level fiber grating sensor monitors the water level, and the settlement monitoring fiber grating sensor monitors the settlement change value to comprehensively ensure safe operation. The online diagnosis function can display the working status of each sensor in real time. When a sensor has an open circuit, it accurately alarms the open circuit position, facilitating the operation and maintenance personnel to quickly repair it. The threshold setting alarm function allows the operation and maintenance unit to set different alarm thresholds for each sensor according to actual needs. When the monitored data reaches the threshold, the system triggers the sound and light alarm device, displays the fault alarm position on the monitoring interface, and notifies relevant personnel through the automatic call system. The data query and modification function supports users to query the monitoring data of any point, set and modify parameters such as the early warning value, alarm value, and recording accuracy of any monitoring point. After being combined with GIS or an electronic map, it can display the position information of the monitoring point on the electronic map and query the specific situation. The expansion function enables the system to either increase the number of sensors or upgrade the system function module, and can also be integrated and work collaboratively with other relevant systems to achieve fully automated management.

[0055] During the system installation process, install the data parsing device at the monitoring center or centralized monitoring location, and connect the monitoring channels, optical cable splicing box, and optical cables as required. Lay the optical cables along the cable ducts or small utility tunnels through the cable trays to each location that needs to be monitored. Inside the cable duct manhole, connect the optical cables through the optical cable splicing box, and then connect the optical cables inside the manhole to each sensor in sequence. The connection method can be fusion splicing or flange connection to ensure firm connection and stable signal transmission.

[0056] During system operation, after the system starts, the data parsing device begins to periodically read the real-time data of each sensor and upload the read data to the system management platform through the bus. The software of the system management platform performs real-time analysis and processing on the data, such as determining whether the temperature data exceeds the preset temperature threshold, whether the liquid level data reaches the dangerous liquid level height, and whether the change in settlement data is within the normal range. When an abnormal situation is detected, immediately activate the audible and visual alarm device, send an alarm message to relevant personnel through the automatic calling system, and at the same time display the detailed fault location and relevant data information on the monitoring interface. The operation and maintenance personnel can query the data, modify the sensor parameters, etc. at any time through the system operation interface to achieve efficient and intelligent monitoring and management of the cable ducts or small integrated utility tunnels.

Claims

1. A cable pipe or small integrated pipe gallery monitoring and alarm system, characterized in that: include: Manhole cover opening and closing grating sensor, used to monitor the opening and closing status of the manhole cover of the cable pipe or small integrated pipe gallery in real time; Liquid level grating sensor, used for real-time monitoring of liquid level in cable pipe wells or sump pits in small integrated pipe galleries; Settlement monitoring grating sensor, used for real-time monitoring of civil construction settlement of cable pipe wells or small integrated pipe galleries; Temperature grating sensor, used to monitor the temperature of power cable joints in cable ducts or small integrated pipe galleries in real time; A data analysis device, connected to the manhole cover opening and closing grating sensor, the liquid level grating sensor, the settlement monitoring grating sensor and the temperature grating sensor through optical fibers, for receiving and analyzing the data of each sensor and uploading it through a bus; The system management platform receives the data uploaded by the data analysis device, performs data analysis, abnormality judgment and alarm, and generates alarm information and response measures.

2. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 1 is characterized in that: The manhole cover opening and closing grating sensor comprises a top cap (1), a compression spring (2), a tray (3), a cantilever beam (4) and a sensing grating; when the manhole cover is opened or closed, the top cap (1) is subjected to force to drive the tray (3) to move through the compression spring (2), and the tray (3) lifts one side of the cantilever beam (4) to deform the sensing grating, thereby determining the state of the manhole cover through wavelength changes.

3. The cable pipe or small integrated pipe gallery monitoring and alarm system according to claim 1 is characterized in that: The liquid level grating sensor comprises a grating sensitive element, a first transparent liquid storage cylinder (60) and a floating rod (50); the first transparent liquid storage cylinder (60) is placed in a sump, and when the liquid level changes, the floating rod (50) drives the force of the grating sensitive element to change, and the data analysis device calculates the liquid level height through the wavelength change.

4. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 1 is characterized in that: The sedimentation monitoring grating sensor comprises two levels connected via a liquid passage tube (1100) and is used to calculate the uneven sedimentation difference through the change of the grating wavelength.

5. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 1 is characterized in that: The temperature grating sensor comprises a grating structure of an ultraviolet light-written optical fiber, and is used to obtain temperature information through the principle that the grating wavelength is modulated by temperature.

6. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 1 is characterized in that: The system management platform includes: It includes an information sharing module, which is used to connect with the operation and maintenance unit system through the industrial bus interface to achieve monitoring data sharing so that the operation and maintenance personnel can obtain operation status information; Fault prediction, alarm and positioning module, which is used to monitor the cable joint temperature, manhole cover status, water level and settlement through various sensors to achieve fault prediction, alarm and positioning; Online diagnostic module, used to display the working status of the sensor in real time and alarm the sensor disconnection position; Threshold setting alarm module, used to set the sensor alarm threshold, trigger sound and light alarm, display fault location and notify relevant personnel when the monitoring data exceeds the threshold; Data query and modification module, used by users to query monitoring data, modify monitoring point parameters, and combine map display and query monitoring point details; Expansion modules are used to add sensors or upgrade functional modules, and integrate and work with other related systems.

7. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 6 is characterized in that: The operation method of the fault prediction alarm and positioning module is: The temperature monitoring grating sensor collects the temperature data of the cable joint in real time and transmits the data to the data analysis device, which then uploads it to the system management platform; The platform analyzes the continuously collected temperature data according to the preset temperature change trend, and triggers the fault prediction function when the temperature change reaches the condition for predicting a fault; Once the cable joint temperature exceeds the set alarm threshold, the fault prediction alarm and positioning module generates an alarm message, determines the overheating location based on the sensor location information, and pushes the alarm information and location information to the monitoring interface for display. Among them, the manhole cover opening and closing grating sensor, liquid level grating sensor, and settlement monitoring grating sensor collect corresponding data according to their respective monitoring principles, and the data processing and alarm positioning process is the same as that of temperature monitoring.

8. The cable pipe arrangement or small integrated pipe gallery monitoring and alarm system according to claim 6 is characterized in that: The operation method of the threshold setting alarm module is: Upload the alarm threshold corresponding to each sensor through the operation interface of the system management platform; The threshold setting alarm module stores each sensor threshold in the system database; The monitoring data uploaded by the data analysis device is compared in real time with the threshold values ​​stored in the database; When the monitoring data exceeds the threshold, the sound and light alarm device is triggered, the fault location is displayed at the same time, and an alarm notification is sent through the automatic calling system based on the pre-entered contact information of the relevant personnel.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of each module in the system management platform as claimed in any one of claims 6 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of each module in the system management platform as claimed in any one of claims 6 to 8 are implemented.

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