Distribution cable trench accumulated water level and condensation state monitoring and early warning system and method

Abstract

The invention relates to the technical field of power distribution cable trench operation environment and state monitoring, and provides a power distribution cable trench accumulated water level and condensation state monitoring and early warning system and method.The system can comprehensively monitor the accumulated water level and condensation state in a cable trench in real time by arranging a plurality of data collecting and processing modules in the cable trench; a data processing module in the data acquisition and processing module performs analog-to-digital conversion on humidity and water level data, the data is quickly transmitted to a data analysis module through a transmission control module, and the data analysis module comprehensively judges the state of the cable trench according to the received humidity and water level data and clearly divides the state into a normal level, an alert level and a dangerous level; the man-machine interaction module visually displays the real-time monitoring data and the state level to operation and maintenance personnel, so that the operation and maintenance personnel can quickly master the environment condition in the cable trench; when the system judges that the cable trench is in a warning or dangerous state, the data analysis module immediately sends a signal to the alarm module, and the alarm module gives an alarm in time.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution cable trench operating environment and status monitoring, and in particular to a distribution cable trench water level and condensation status monitoring and early warning system and method. Background Art

[0002] The distribution cable trench (well) is an important part of the laying and maintenance of buried cables. Its safe and stable operation is crucial to the overall efficiency and reliability of the power grid. With the increase of service life, the health of the cable trench (well) gradually declines. Environmental and weather changes, especially rainfall and water invasion, often lead to water accumulation in the cable channel. Water accumulation not only affects the normal operation of the cable, but also may expose the cable body and connectors to harsh environments for a long time, accelerate oxidation and corrosion, and then cause the power supply line to be disconnected or grounded. This has a huge impact on the normal power supply and brings huge losses to social production and residents' lives.

[0003] When monitoring the status of cable trenches (wells), maintenance personnel often cannot obtain relevant data in real time, which increases the risk of cable operation under adverse conditions. According to statistics, power failures caused by water accumulation in cable trenches (wells) account for nearly 10% of total failures worldwide each year, and the economic losses are as high as tens of billions of dollars. This fact reflects the seriousness of the problem.

[0004] Under the current technical background, the water accumulation monitoring and early warning system of distribution cable trenches (wells) has obvious deficiencies, which not only affects the stability of the power system, but also increases maintenance costs and safety hazards. Traditional monitoring methods mainly rely on manual inspections, which have several key problems:

[0005] 1. The operation and maintenance personnel cannot grasp the environment and status of the cable trench (well) in time, and it is difficult to foresee potential failures;

[0006] 2. Lack of effective monitoring results in frequent failures caused by reduced insulation levels when cables are operated in harsh environments for a long time;

[0007] 3. The manpower and financial requirements during cleaning, maintenance and fault repair are also high, which increases the pressure on operation and maintenance.

[0008] Based on this, the present invention proposes a distribution cable trench water level and condensation status monitoring and early warning system and method to solve the above problems. Summary of the invention

[0009] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a distribution cable trench water level and condensation status monitoring and early warning system and method to monitor the distribution cable trench operating environment and status.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A distribution cable trench water level and condensation status monitoring and early warning system, comprising:

[0012] Several data acquisition and processing modules, data analysis modules, human-computer interaction modules, and alarm modules installed in each cable trench that needs monitoring and early warning;

[0013] The data acquisition and processing module includes: a condensation state monitoring module, a water level monitoring module, a data processing module, and a transmission control module; the water level monitoring modules are arranged on the side walls of the cable trench, and there is a certain gap between the water level monitoring modules in the vertical direction; the water level monitoring module sends the trigger time to the transmission control module;

[0014] The condensation state monitoring module includes: a plurality of humidity detection sensors respectively arranged at the entrance, middle and exit of the cable trench, and a transmission line connecting the outputs of the plurality of humidity detection sensors with the input of the data processing module; the data processing module performs analog-to-digital conversion on the output data of the humidity detection sensors and outputs the data to the transmission control module;

[0015] The transmission control module transmits the signal output by the data processing module and the signal sent by the signal transmitting device to the data analysis module;

[0016] The data analysis module is interconnected with the data acquisition and processing module, the human-computer interaction module, and the alarm module. The data analysis module divides the cable trench into three states: normal, warning, and dangerous according to the signal output by the transmission control module. Regardless of the state of the cable trench, the data analysis module outputs the condensation state and the water level change state to the human-computer interaction module. When the cable trench is in the warning or dangerous state, the data analysis module outputs an alarm signal to the alarm module.

[0017] Preferably, the accumulated water level monitoring module includes: a support rod; a quick installation assembly is installed on the outer side of the support rod, a signal transmitting device is installed on the top of the support rod, and a trigger switch and a float arm are installed on the sides of the support rod respectively, the top of the float arm is rotatably connected to the support rod, and an extrusion rod is provided near the support rod; when the trigger switch is triggered, the signal transmitting device sends a trigger signal to the transmission control module.

[0018] Preferably, the quick installation component includes a horizontal plate, a sliding groove is opened inside the horizontal plate, the side of the horizontal plate is connected with a threaded rod through a threaded connection, the side of the threaded rod is rotatably connected with a slider, the top of the slider is equipped with a connecting rod, and the connecting rod is connected to the cable rack in the cable trench.

[0019] Preferably, an emergency pump is provided at the bottom of the cable trench, and an exhaust fan is provided at the top of the cable trench.

[0020] Preferably, the transmission control module uses NB-IoT communication module data processing modules to communicate with each other.

[0021] Another object of the present invention is to provide a method for monitoring and warning the water level and condensation status of a distribution cable trench using the above-mentioned distribution cable trench water level and condensation status monitoring and warning system, comprising the following steps:

[0022] S1, data acquisition, through the data acquisition and processing module installed in the cable trench, respectively collects humidity data and water level trigger time data;

[0023] S2, data processing and transmission, the data in the data acquisition and processing module is transmitted to the data analysis module through the transmission control module using NB-IoT;

[0024] S3, data analysis and judgment, in the data analysis module, the transmitted data is processed and analyzed, and the threshold is set through the human-computer interaction module to judge the condensation state of the cable trench and the change state of the accumulated water level;

[0025] S4. Comprehensive status judgment of cable trench, dividing the cable trench into three states: normal, warning and dangerous;

[0026] S5. Alarm and response. When the cable trench is in a warning or dangerous state, the data analysis module outputs an alarm signal to the alarm module. Regardless of the state of the cable trench, the data analysis module outputs the condensation state and the water level change state to the human-computer interaction module.

[0027] Preferably, in step S1, the humidity data is collected in real time by the humidity sensor in the condensation status monitoring module at the entrance, middle and exit of the cable trench, and the humidity signal H is converted into a digital form and output to the transmission control module; after the trigger switch of the water level monitoring module is triggered, the signal transmitting device sends a trigger signal to the transmission control module, and the transmission control module records the trigger time.

[0028] Preferably, in step S3, the condensation state interval is:

[0029] Normal state: H<40%;

[0030] Condensation state: 40% ≤ H < 90%;

[0031] Flooding state: H ≥ 90%;

[0032] The changing state of the accumulated water level is determined by calculating the water level rising speed ΔWi;

[0033]

[0034] Where Wi represents the water level height when the i-th accumulated water level monitoring module is triggered, that is, the height of the trigger switch, in centimeters; Wi-1 represents the water level height when the first accumulated water level monitoring module below the i-th accumulated water level monitoring module is triggered, in centimeters; ti represents the time when the i-th accumulated water level monitoring module is triggered, in minutes; ti-1 represents the time when the first accumulated water level monitoring module below the i-th accumulated water level monitoring module is triggered, in minutes;

[0035] If ΔWi≤0.5cm / min, it is normal;

[0036] If 0.5cm / min<ΔWi≤1.5cm / min, it is a moderate rise state;

[0037] If ΔWi>1.5cm / min, it is a rapid rising state.

[0038] Preferably, in step S4, the normal state: the humidity state is normal and the water accumulation rising speed is normal; the warning state: the humidity state is condensation or the water accumulation rising speed is moderate rising; the dangerous state: the humidity state is flooding or the water accumulation rising speed is rapid rising.

[0039] Preferably, in step S5, the human-computer interaction module displays the current humidity H and the calculated water level rising speed ΔW, as well as the status level; the alarm module issues an alarm notification in the warning and danger states; when the cable trench is in a normal state: continue monitoring and record regularly; when the cable trench is in a warning state: increase the inspection frequency and make emergency preparations; when the cable trench is in a dangerous state: immediately notify relevant personnel and implement emergency drainage; when in a condensation state, the exhaust fan works to dehumidify; when in a flooded state, the exhaust fan stops working; when the first water level monitoring module is triggered or is in a flooded state, the emergency pump starts working.

[0040] The present invention discloses a distribution cable trench water level and condensation state monitoring and early warning system and method, which have the following beneficial effects.

[0041] By arranging multiple data acquisition and processing modules in the cable trench, the system can comprehensively and real-time monitor the water level and condensation status in the cable trench. The data processing module in the data acquisition and processing module performs analog-to-digital conversion on the humidity and water level data, and quickly transmits the data to the data analysis module through the transmission control module using efficient NB-IoT communication technology. The data analysis module has the advantages of low power consumption, wide coverage, large capacity, and low cost. The data analysis module comprehensively judges the status of the cable trench based on the received humidity and water level data, and clearly divides it into three levels: normal, warning, and dangerous, providing accurate environmental status assessment; the condensation status monitoring module sets humidity at the entrance, middle, and exit of the cable trench respectively. The detection sensor and water level monitoring module distribute multiple monitoring points in the vertical direction, which can capture the environmental changes in different positions in detail, making the monitoring more sensitive and comprehensive; the human-computer interaction module displays the real-time monitoring data and status level intuitively to the operation and maintenance personnel, so that they can quickly grasp the environmental conditions in the cable trench and facilitate timely processing; when the system determines that the cable trench is in a warning or dangerous state, the data analysis module immediately sends a signal to the alarm module, and the alarm module issues an alarm in time to notify relevant personnel to take countermeasures quickly to avoid potential safety hazards; the system's automated monitoring and early warning functions can automatically issue an alarm and prompt the operation and maintenance personnel to take measures when an abnormality occurs in the cable trench environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the principle of the present invention.

[0043] Figure 2 The diagram is a schematic diagram of the arrangement of the data acquisition and processing module, the exhaust fan and the emergency pump in the cable trench of the present invention.

[0044] Figure 3 It is a schematic diagram of the structure of the accumulated water level monitoring module of the present invention.

[0045] Figure 4 It is a schematic diagram of the structure of the quick installation component of the water level monitoring module of the present invention.

[0046] Figure 5 The present invention is a flow chart of the method for monitoring and early warning of water level and condensation status in a distribution cable trench.

[0047] In the attached figure: 1. Human-computer interaction module; 2. Data analysis module; 3. Data acquisition and processing module; 31. Condensation status monitoring module; 311. Humidity detection sensor; 312. Transmission line; 32. Water level monitoring module; 321. Support rod; 322. Signal transmitter; 323. Trigger switch; 324. Float arm; 325. Extrusion rod; 326. Quick installation assembly; 3261. Cross plate; 3262. Slider; 3263. Slide; 3264. Threaded rod; 3265. Connecting rod; 33. Data processing module; 34. Transmission control module; 4. Alarm module; 5. Cable trench; 6. Emergency pump; 7. Exhaust fan. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0049] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] Example 1

[0051] Please refer to Figure 1 , a distribution cable trench water level and condensation status monitoring and early warning system, comprising:

[0052] A data acquisition and processing module 3, a data analysis module 2, a human-computer interaction module 1, and an alarm module 4 installed in a cable trench 5 that needs monitoring and early warning;

[0053] The data acquisition and processing module 3 includes: a condensation state monitoring module 31, a water level monitoring module 32, a data processing module 33, and a transmission control module 34; please refer to Figure 2 There are 9 accumulated water level monitoring modules 32 in total, which are arranged in three groups at the entrance section, middle section and exit section of the cable trench 5 respectively. The accumulated water level monitoring modules 32 in each group are arranged vertically and set on the side wall, or can be fixed on the cable rack. There is a certain gap in the vertical direction between the three accumulated water level monitoring modules 32 in each group; the accumulated water level monitoring module 32 sends the trigger time to the transmission control module 34;

[0054] Please refer to Figure 2The condensation state monitoring module 31 includes: three humidity detection sensors 311 respectively arranged at the entrance, middle and exit of the cable trench 5, and transmission lines 312 respectively connecting the outputs of the three humidity detection sensors 311 to the inputs of the data processing module 33; the data processing module 33 performs analog-to-digital conversion on the output data of the humidity detection sensor 311 and outputs it to the transmission control module 34; the humidity detection sensor 311 can select Honeywell HIH-4000, and the data processing module 33 can select an adapted ADC converter.

[0055] The transmission control module 34 transmits the signal output by the data processing module 33 and the signal sent by the signal transmitting device 322 to the data analysis module 2; the transmission control module 34 uses the NB-IoT communication module to communicate with the data processing module 33; the transmission control module 34 uses Quectel BC95, which has the advantages of wide coverage, low power consumption, high connection density and low cost. Its wide coverage capability enables it to maintain good communication performance even in places that are difficult to cover, such as the cable trench 5; its low power consumption characteristics extend the service life of battery-powered devices; it supports a large number of devices to be connected at the same time, and its relatively low price is suitable for large-scale deployment. The BC95 module has high reliability, supports multiple frequency bands, can be used worldwide, and provides a wealth of development interfaces and simple integration methods. It supports AT command sets, which is easy for developers to integrate.

[0056] The data analysis module 2 is interconnected with the data acquisition and processing module 3, the human-computer interaction module 1, and the alarm module 4. The data analysis module 2 uses Raspberry Pi 4B. The data analysis module 2 divides the cable trench 5 into three states: normal, warning, and dangerous according to the signal output by the transmission control module 34. Regardless of the state of the cable trench 5, the data analysis module 2 outputs the condensation state and the water level change state to the human-computer interaction module 1. The human-computer interaction module 1 uses WeintekMT8071iE. When the cable trench 5 is in the warning or dangerous state, the data analysis module 2 outputs an alarm signal to the alarm module 4. Raspberry Pi 4B has a quad-core Cortex-A72 64-bit SoC (clocked at 1.5GHz) that can handle complex data analysis tasks. It also provides a variety of memory configurations (2GB, 4GB and 8GB LPDDR4-3200 SDRAM) to cope with large-scale data sets. It has a wealth of interfaces, including dual Micro-HDMI, multiple USB 3.0 and USB 2.0 interfaces, and Gigabit Ethernet interfaces to meet high bandwidth and multiple peripheral connection requirements. It is inexpensive and easy to purchase, reducing project costs.

[0057] Weintek MT8071iE has a high resolution and a built-in Cortex A8 600MHz processor. The computing power can meet the system requirements. It has rich interfaces, including Ethernet, serial port (RS232 / RS485), USB Host and USB Client, supports multiple communication methods and peripheral connections, and is easy to integrate with various devices and systems.

[0058] When the humidity detection sensor 311 in the cable trench 5 detects humidity changes, the data processing module 33 performs analog-to-digital conversion on the humidity data and transmits it to the transmission control module 34. The water level monitoring module 32 sends the trigger time to the transmission control module 34; the transmission control module 34 then sends these data to the data analysis module 2 for analysis.

[0059] By arranging multiple data acquisition and processing modules 3 in the cable trench 5, the system can comprehensively and real-time monitor the water level and condensation status in the cable trench 5. The data processing module 33 in the data acquisition and processing module 3 performs analog-to-digital conversion on the humidity and water level data, and uses efficient NB-IoT communication technology through the transmission control module 34 to quickly transmit the data to the data analysis module 2, which has the advantages of low power consumption, wide coverage, large capacity, and low cost. The data analysis module 2 comprehensively judges the status of the cable trench 5 based on the received humidity and water level data, and clearly divides it into three levels: normal, warning, and dangerous, providing accurate environmental status assessment; the condensation status monitoring module 31 sets humidity at the entrance, middle, and exit of the cable trench 5 The detection sensor 311 and the water level monitoring module 32 are distributed with multiple monitoring points in the vertical direction, which can capture the environmental changes in different positions in detail, making the monitoring more sensitive and comprehensive; the human-computer interaction module 1 displays the real-time monitoring data and status level intuitively to the operation and maintenance personnel, so that they can quickly grasp the environmental conditions in the cable trench 5 and facilitate timely processing; when the system determines that the cable trench 5 is in a warning or dangerous state, the data analysis module 2 immediately sends a signal to the alarm module 4, and the alarm module 4 issues an alarm in time to notify relevant personnel to take countermeasures quickly to avoid potential safety hazards; the system's automated monitoring and early warning functions can automatically issue an alarm and prompt the operation and maintenance personnel to take measures when an abnormality occurs in the cable trench 5 environment.

[0060] Example 2

[0061] Based on Example 1, please refer to Figures 2 to 4The present embodiment provides a water level monitoring module 32, including: a support rod 321; in order to be suitable for the humid environment of the cable trench 5, the support rod 321 is made of anti-corrosion material (such as stainless steel or high-strength plastic), the outer side of the support rod 321 is equipped with a quick installation component 326, the top of the support rod 321 is equipped with a signal transmitter 322, and the sides of the support rod 321 are respectively equipped with a trigger switch 323 and a float arm 324, the top of the float arm 324 is rotatably connected to the support rod 321, and the float arm 324 is provided with an extrusion rod 325 near the support rod 321; when the trigger switch 323 is triggered, the signal transmitter 322 sends a trigger signal to the transmission control module 34;

[0062] The signal transmitting device 322 adopts the NRF24L01+ wireless transmitting module, and its power consumption is very low: only 12.3mA in low power mode and 900nA in sleep mode. The quick installation component 326 also adopts anti-corrosion materials or performs anti-corrosion treatment on its surface.

[0063] Preferably, in the present embodiment, the quick installation assembly 326 includes a transverse plate 3261, a slide groove 3263 is provided inside the transverse plate 3261, a side of the transverse plate 3261 is threadedly connected with a threaded rod 3264, a side of the threaded rod 3264 is rotatably connected with a slider 3262, a connecting rod 3265 is mounted on the top of the slider 3262, the connecting rod 3265 is connected to the cable rack in the cable trench 5, and the threaded rod 3264 can be rotated to drive the connecting rod 3265 to slide, thereby facilitating the fixing of the connecting rod 3265 to the cable rack.

[0064] The triggering principle is that the float arm 324 of the water level monitoring module 32 floats up as the water level rises, that is, the top of the float arm 324 rotates around the rotation connection point between the top of the float arm 324 and the bracket rod 321. When the set water level is reached, the float arm 324 contacts the trigger switch 323 through the squeezing rod 325. At this time, the signal transmitting device 322 sends a trigger signal to the transmission control module 34.

[0065] Example 3

[0066] Based on Example 1, please refer to Figure 2 In this embodiment, an emergency pump 6 is provided at the bottom of the cable trench 5, and an exhaust fan 7 is provided at the top of the cable trench 5. The emergency pump 6 adopts an electric pump and can receive instructions issued by the data analysis module 2. When it is in a condensation state, the data analysis module 2 controls the exhaust fan 7 to work for dehumidification; when it is in a flooded state, the data analysis module 2 controls the exhaust fan 7 to stop working; when the first water level monitoring module 32 is triggered or is in a flooded state, the data analysis module 2 controls the emergency pump 6 to start working.

[0067] Example 4

[0068] Based on Examples 1-3, please refer to Figure 5 This embodiment provides a method for monitoring and warning the water level and condensation status of a distribution cable trench using the above-mentioned distribution cable trench water level and condensation status monitoring and warning system, including the following steps:

[0069] S1, data collection, through the data collection and processing module 3 installed in the cable trench 5, respectively collect humidity data and water level trigger time data; it is worth noting that when the data collection and processing module 3 performs data collection, the number of the sensor or trigger switch 323 that collects the data will be synchronously output;

[0070] Preferably, in the present embodiment, in step S1, the humidity data is collected in real time at the entrance, middle and exit of the cable trench 5 by the humidity sensor in the condensation status monitoring module 31, and the humidity signal H is converted into a digital form and output to the transmission control module 34; after the trigger switch 323 of the water level monitoring module 32 is triggered, the signal transmitting device 322 sends a trigger signal to the transmission control module 34, and the transmission control module 34 records the trigger time.

[0071] S2, data processing and transmission, transmitting the data in the data acquisition and processing module 3 to the data analysis module 2 through the transmission control module 34 using NB-IoT;

[0072] S3, data analysis and judgment, the transmitted data is processed and analyzed in the data analysis module 2, and the threshold is set through the human-computer interaction module 1 to judge the condensation state of the cable trench 5 and the change state of the accumulated water level;

[0073] Preferably, in this embodiment, in step S3, the condensation state interval is:

[0074] Normal state: H<40%;

[0075] Condensation state: 40% ≤ H < 90%;

[0076] Flooding state: H ≥ 90%;

[0077] The changing state of the accumulated water level is determined by calculating the water level rising speed ΔWi;

[0078]

[0079] Wherein Wi represents the water level height when the i-th accumulated water level monitoring module 32 is triggered, that is, the height of the trigger switch 323, in centimeters; Wi-1 represents the water level height when the first accumulated water level monitoring module 32 below the i-th accumulated water level monitoring module 32 is triggered, in centimeters; ti represents the time when the i-th accumulated water level monitoring module 32 is triggered, in minutes; ti-1 represents the time when the first accumulated water level monitoring module 32 below the i-th accumulated water level monitoring module 32 is triggered, in minutes;

[0080] If ΔWi≤0.5cm / min, it is normal;

[0081] If 0.5cm / min<ΔWi≤1.5cm / min, it is a moderate rise state;

[0082] If ΔWi>1.5cm / min, it is a rapid rising state.

[0083] S4, comprehensive status judgment of cable trench 5, dividing cable trench 5 into three states: normal, warning and dangerous;

[0084] Preferably, in this embodiment, in step S4, normal state: the humidity state is normal, and the water accumulation rising speed is normal; warning state: the humidity state is condensation or the water accumulation rising speed is moderate rising; dangerous state: the humidity state is flooding or the water accumulation rising speed is rapid rising.

[0085] S5, alarm and response. When the cable trench 5 is in a warning or dangerous state, the data analysis module 2 outputs an alarm signal to the alarm module 4. Regardless of the state of the cable trench 5, the data analysis module 2 outputs the condensation state and the water level change state to the human-computer interaction module 1.

[0086] Preferably, in this embodiment, in step S5, the human-computer interaction module 1 displays the current humidity H and the calculated water level rise speed ΔW, as well as the state level; the alarm module 4 issues an alarm notification in the alert and dangerous state;

[0087] When the cable trench 5 is in normal state: continue monitoring and record regularly;

[0088] When the cable trench 5 is in alert state: increase the inspection frequency and make emergency preparations;

[0089] When the cable trench 5 is in a dangerous state: immediately notify relevant personnel and implement emergency drainage;

[0090] When in the condensation state, the exhaust fan 7 works to remove moisture;

[0091] When in flooded state, exhaust fan 7 stops working;

[0092] When the first accumulated water level monitoring module 32 is triggered or is in a flooded state, the emergency pump 6 starts to work.

[0093] It is worth mentioning that when the human-computer interaction module 1 displays the current humidity H and the calculated water level rise speed ΔW, as well as the status level, it will display the data source, that is, it will display which humidity detection sensor 311 and water level monitoring module 32 in the data acquisition and processing module 3 transmits the signal, so as to facilitate positioning by the staff.

[0094] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of a part of the structure, device, method step, or a complete technical solution. The equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A distribution cable trench water level and condensation status monitoring and early warning system, characterized in that: include: Several data acquisition and processing modules, data analysis modules, human-computer interaction modules, and alarm modules installed in each cable trench that needs monitoring and early warning; The data acquisition and processing module includes: a condensation state monitoring module, a water level monitoring module, a data processing module, and a transmission control module; the water level monitoring modules are arranged on the side walls of the cable trench, and there is a certain gap between the water level monitoring modules in the vertical direction; the water level monitoring module sends the trigger time to the transmission control module; The condensation state monitoring module includes: a plurality of humidity detection sensors respectively arranged at the entrance, middle and exit of the cable trench, and a transmission line connecting the outputs of the plurality of humidity detection sensors with the input of the data processing module; the data processing module performs analog-to-digital conversion on the output data of the humidity detection sensors and outputs the data to the transmission control module; The transmission control module transmits the signal output by the data processing module and the signal sent by the signal transmitting device to the data analysis module; The data analysis module is interconnected with the data acquisition and processing module, the human-computer interaction module, and the alarm module. The data analysis module divides the cable trench into three states: normal, warning, and dangerous according to the signal output by the transmission control module. Regardless of the state of the cable trench, the data analysis module outputs the condensation state and the water level change state to the human-computer interaction module. When the cable trench is in the warning or dangerous state, the data analysis module outputs an alarm signal to the alarm module.

2. The distribution cable trench water level and condensation status monitoring and early warning system according to claim 1, characterized in that: The accumulated water level monitoring module includes: a support rod; a quick installation assembly is installed on the outer side of the support rod, a signal transmitting device is installed on the top of the support rod, and a trigger switch and a float arm are installed on the sides of the support rod respectively, the top of the float arm is rotatably connected to the support rod, and an extrusion rod is provided near the support rod of the float arm; when the trigger switch is triggered, the signal transmitting device sends a trigger signal to the transmission control module.

3. The distribution cable trench water level and condensation status monitoring and early warning system according to claim 2, characterized in that: The quick installation component includes a transverse plate, a slide groove is opened inside the transverse plate, a threaded rod is threadedly connected to the side of the transverse plate, a slider is rotatably connected to the side of the threaded rod, a connecting rod is assembled on the top of the slider, and the connecting rod is connected to the cable rack in the cable trench.

4. The distribution cable trench water level and condensation status monitoring and early warning system according to claim 1, characterized in that: An emergency pump is arranged at the bottom of the cable trench, and an exhaust fan is arranged at the top of the cable trench.

5. The distribution cable trench water level and condensation status monitoring and early warning system according to claim 1, characterized in that: The transmission control module uses the NB-IoT communication module to communicate with the data processing module.

6. A method for monitoring and warning water level and condensation status of a distribution cable trench, using the monitoring and warning system for water level and condensation status of a distribution cable trench as claimed in any one of claims 1 to 5, characterized in that: The steps include: S1, data acquisition, through the data acquisition and processing module installed in the cable trench, respectively collects humidity data and water level trigger time data; S2, data processing and transmission, the data in the data acquisition and processing module is transmitted to the data analysis module through the transmission control module using NB-IoT; S3, data analysis and judgment, in the data analysis module, the transmitted data is processed and analyzed, and the threshold is set through the human-computer interaction module to judge the condensation state of the cable trench and the change state of the accumulated water level; S4. Comprehensive status judgment of cable trench, dividing the cable trench into three states: normal, warning and dangerous; S5. Alarm and response. When the cable trench is in a warning or dangerous state, the data analysis module outputs an alarm signal to the alarm module. Regardless of the state of the cable trench, the data analysis module outputs the condensation state and the water level change state to the human-computer interaction module.

7. The method for monitoring and early warning of water level and condensation status in a distribution cable trench according to claim 6, characterized in that: In the step S1, the humidity data is collected in real time at the entrance, middle and exit of the cable trench by the humidity sensor in the condensation status monitoring module, and the humidity signal H is converted into a digital form and output to the transmission control module; after the trigger switch of the water level monitoring module is triggered, the signal transmitting device sends a trigger signal to the transmission control module, and the transmission control module records the trigger time.

8. The method for monitoring and early warning of water level and condensation status in a distribution cable trench according to claim 6, characterized in that: In step S3, the condensation state interval is: Normal state: H<40%; Condensation state: 40% ≤ H < 90%; Flooding state: H ≥ 90%; The changing state of the accumulated water level is determined by calculating the water level rising speed ΔWi; Where Wi represents the water level height when the i-th accumulated water level monitoring module is triggered, that is, the height of the trigger switch, in centimeters; Wi-1 represents the water level height when the first accumulated water level monitoring module below the i-th accumulated water level monitoring module is triggered, in centimeters; ti represents the time when the i-th accumulated water level monitoring module is triggered, in minutes; ti-1 represents the triggering time of the first water level monitoring module below the i-th water level monitoring module, in minutes; If ΔWi≤0.5cm / min, it is normal; If 0.5cm / min<ΔWi≤1.5cm / min, it is a moderate rise state; If ΔWi>1.5cm / min, it is a rapid rising state.

9. The method for monitoring and early warning of water level and condensation status in a distribution cable trench according to claim 6, characterized in that: In step S4, the normal state: the humidity state is normal and the water accumulation rises at a normal speed; the warning state: the humidity state is condensation or the water accumulation rises at a moderate speed; the dangerous state: the humidity state is flooding or the water accumulation rises at a rapid speed.

10. The method for monitoring and early warning of water level and condensation status in a distribution cable trench according to claim 6, characterized in that: In step S5, the human-computer interaction module displays the current humidity H and the calculated water level rise speed ΔW, as well as the status level; the alarm module issues an alarm notification in the warning and danger states; when the cable trench is in a normal state: continue monitoring and record regularly; when the cable trench is in a warning state: increase the inspection frequency and make emergency preparations; when the cable trench is in a dangerous state: immediately notify relevant personnel and implement emergency drainage; when in a condensation state, the exhaust fan works to dehumidify; when in a flooded state, the exhaust fan stops working; when the first water level monitoring module is triggered or is in a flooded state, the emergency pump starts working.

Images