NB-loT-based water level early warning monitoring device and method

Abstract

The invention discloses an NB-loT-based water level early warning monitoring device and method.The NB-loT-based water level early warning monitoring device comprises a first connecting ring located on the upper side and a second connecting ring located on the lower side, the first connecting ring and the second connecting ring are fixedly connected through a connecting rod, and a monitoring assembly is arranged on one side of the first connecting ring; the monitoring assembly comprises a floating cylinder arranged in the first connecting cylinder and a plurality of capacitive liquid level sensors arranged in the second connecting cylinder, a first contact pin at the top of the floating cylinder is matched with a second contact pin over the first contact pin, the top of the second contact pin is connected with the bottom of the NB-IoT communication module, and when the first contact pin makes contact with the second contact pin, the NB-IoT communication module is connected with the NB-IoT communication module. The NB-IoT communication module, the first contact pin and the second contact pin can form a complete loop. The output end of the capacitive liquid level sensor is connected with the input end of the control box, and the inner side of the first connecting ring is connected with the top of the height adjusting mechanism. The problems that when the water level rises, the device lacks the function of flexibly adjusting the height of the device, the device is prone to being soaked and damaged by rising water, the early warning mode is single, and the warning effect is limited are solved.

Description

Technical Field

[0001] This invention relates to the field of water level early warning and monitoring technology, and in particular to a water level early warning and monitoring device and method based on NB-IoT. Background Technology

[0002] In flood control work, real-time monitoring and timely early warning of water levels are key to protecting people's lives and property and reducing flood damage. By accurately grasping the dynamic changes in water levels, we can provide a scientific basis for flood control decisions and make advance preparations for flood control such as personnel evacuation and material allocation. Therefore, efficient and reliable flood early warning and monitoring devices occupy an important position in the flood control system.

[0003] Currently, some devices lack the ability to flexibly adjust their height when the water level rises, making them susceptible to damage from being submerged in rising water. This leads to interruptions in monitoring and an inability to continuously provide effective water level data. Furthermore, the early warning methods are relatively simple, resulting in limited alerting effectiveness and difficulty in quickly reaching relevant personnel, thus affecting the timeliness of flood control response. Additionally, after prolonged operation in harsh environments, the detection end of the water level gauge is prone to contamination, which may affect the accuracy of subsequent monitoring. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a water level early warning monitoring device and method based on NB-IoT, so as to solve the problems mentioned in the background art, such as the lack of flexible height adjustment function when the water level rises, easy damage by being submerged by rising water, resulting in interruption of monitoring work, and the relatively simple early warning method with limited warning effect.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a water level early warning monitoring device based on NB-IoT, including a connecting ring one located on the upper side and a connecting ring two located on the lower side, the connecting ring one and the connecting ring two being fixedly connected by a connecting rod, a monitoring component being provided on one side of the connecting ring one, the monitoring component including a float disposed in the connecting cylinder one and multiple capacitive liquid level sensors disposed in the connecting cylinder two, a contact pin one at the top of the float one cooperating with a contact pin two directly above it, the top of the contact pin two being connected to the bottom of the NB-IoT communication module, when the contact pin one and the contact pin two are in contact, the NB-IoT communication module and the contact pin one and the contact pin two can form a complete circuit; the output end of the capacitive liquid level sensor is connected to the input end of the control box, and the inner side of the connecting ring one is connected to the top of the height adjustment mechanism.

[0006] Preferably, the monitoring component includes a support frame fixedly connected to one side of the connecting ring, a support plate fixedly connected to one side of the support frame, an ultrasonic water level gauge disposed on one side of the support plate, a mounting bracket fixedly connected to the bottom of the support plate, and a camera disposed at the bottom of the mounting bracket.

[0007] Preferably, the other side of the connecting ring is provided with a connecting cylinder 1 and a connecting cylinder 2. The side surface of the connecting cylinder 1 is provided with a water inlet, and a float is provided inside it. Two protective rings arranged in a linear array are fixedly connected to the side surface of the float, and a contact pin 1 is fixedly connected to the top. A contact pin 2 is provided above the top of the contact pin 1. The connecting cylinder 2 is provided with a protective frame inside, and four capacitive liquid level sensors arranged in a linear array are fixedly connected inside the protective frame.

[0008] Preferably, the height adjustment mechanism includes a support rod fixedly connected inside the connecting ring, the bottom of the support rod having an installation groove, an electric push rod fixedly installed inside the installation groove, and a push rod fixedly connected to the pushing end of the bottom of the electric push rod.

[0009] Preferably, four connecting rods distributed at four corners are fixedly connected to the bottom of the first connecting ring, and a second connecting ring is fixedly connected to the bottom of the four connecting rods. Sealing gaskets are fixedly connected to the sides of the four connecting rods that are close to each other. A second support rod is slidably connected inside the second connecting ring. A connecting groove is opened inside the second support rod. The inside of the connecting groove is slidably connected to the outside of the first support rod. A mounting base is fixedly connected to the bottom of the second support rod. The inside of the mounting base is fixedly connected to the other end of the push rod.

[0010] Preferably, it also includes a cleaning mechanism, which includes a protective shell fixedly connected to the bottom of the support plate. A linear motor is installed inside the protective shell, and a cleaning brush is fixedly connected to the pushing end of one side of the linear motor through the protective shell.

[0011] Preferably, a second protective shell is fixedly connected to one side of the first protective shell. The second protective shell is located at the bottom of the cleaning brush and is used to cover the bottom and sides of the cleaning brush when it is not in use. The top opening does not affect the movement of the cleaning brush during cleaning.

[0012] Preferably, the control box is fixedly connected to the other side of two of the connecting rods, and the bottom of the control box is fixedly connected to the top of the second connecting cylinder; a display screen is fixedly connected to the other side of the control box, a control panel is fixedly connected inside, and an audible and visual alarm is provided on the outside, with the bottom of the audible and visual alarm fixedly connected to the top of the first support rod.

[0013] Preferably, the control panel is electrically connected to a data processing module, a data storage module, and a wireless signal communication module. The data processing module is electrically connected to the ultrasonic water level gauge and the camera. The control box is electrically connected to the display screen, the audible and visual alarm, and the electric push rod.

[0014] Preferably, the bottom of the control box is provided with a fixing groove, the bottom of the fixing groove is fixedly connected to the top of the connecting cylinder one, the inside of the fixing groove is fixedly connected to an NB-IoT communication module, and the bottom of the NB-IoT communication module is fixedly connected to a contact pin two.

[0015] Preferably, it also includes a power supply mechanism, which includes a mounting frame two fixedly connected to the other side of the connecting ring one. A photovoltaic panel is fixedly connected to the top of the mounting frame two, and a storage battery is provided at the bottom of the photovoltaic panel. The photovoltaic panel is electrically connected to the storage battery, and the storage battery is fixedly connected inside the control box and electrically connected to the control panel.

[0016] This invention also discloses a water level early warning monitoring method based on NB-IoT, applied to the above-mentioned device, comprising the following steps: Step 1: Fix the device in key areas where water levels need to be monitored, such as around the power station, using the mounting base. Use four connecting rods, connecting ring one, connecting ring two, and a sealing gasket on the nearest side to prevent external mud, sand, and debris from entering the device. Step 2: After the device is started, the ultrasonic water level gauge collects water level data in real time, and the camera at the bottom of the mounting frame simultaneously captures on-site images of water flow and surrounding environment in the monitoring area; at the same time, external water enters the cylinder through the water inlet on the side surface of the connecting cylinder, the float moves up and down with the water level, and the stylus moves synchronously with the float. Step 3: When the water level reaches the preset warning height, the first contact pin contacts the second contact pin at the top, and the NB-IoT communication module forms a complete circuit with the first and second contact pins, sending an alarm to the city management personnel and triggering a warning signal; Step 4: The collected water level data and on-site video data are transmitted to the data processing module for analysis and processing. The processed data is then transmitted to the control panel, which stores it in the data storage module. At the same time, the processed monitoring data and on-site images are transmitted to the power plant's integrated automation monitoring backend via the wireless signal communication module, and the display screen and audible and visual alarms are controlled to issue audible and visual alarms. Step 5: The photovoltaic panels convert solar energy into electrical energy and store it in the battery, which continuously supplies power to all electrical components of the device; Step 6: As the water level rises, the water flows into the second connecting cylinder. The capacitive liquid level sensor changes its capacitance value due to contact with the water, generating a corresponding level of electrical signal. The control panel, combined with preset parameters, determines the warning stage, controls the audible and visual alarm to issue an alarm with the corresponding frequency and volume, and processes, stores, and transmits the warning information to the monitoring center. Step 7: If the warning stage reaches advanced or above, the control panel sends a command to control the electric push rod to push the push rod, causing support rod one to slide in the connecting groove of support rod two, adjusting the overall height of connecting ring one and monitoring components; Step 8: The linear motor receives the drive signal from the control panel according to the preset cycle, and drives the cleaning brush to reciprocate along the detection end of the ultrasonic water level gauge to remove stains. After cleaning, the cleaning brush is driven to return to the unobstructed area.

[0017] Furthermore, in step 6, the four capacitive liquid level sensors correspond to four warning stages: primary, intermediate, advanced, and emergency. During the primary warning, the audible and visual alarm emits a low-frequency, low-volume audible and visual alarm. During the intermediate warning, the frequency and volume of the audible and visual alarm are increased. During the advanced warning, the audible and visual alarm continuously sounds at a high frequency and high volume, and the control panel is linked to the electric push rod to adjust the height of the device, transmitting the warning information with a higher priority. During the emergency warning, the audible and visual alarm emits the strongest audible and visual warning.

[0018] Furthermore, it also includes step 9: After the support rod drives the monitoring component to complete the height adjustment in step 5, the control panel automatically collects the displacement data of this height adjustment and transmits the displacement data to the data processing module; the data processing module synchronously corrects the measurement reference parameters of the ultrasonic water level gauge based on the displacement data, and the corrected parameters are fed back to the control panel and stored in the data storage module to ensure that the ultrasonic water level gauge can still accurately collect water level data with the corrected reference parameters at the new height, and compensate for the measurement error caused by the height change.

[0019] Furthermore, step 10 is also included: After the contact between the first and second styluses in step 3 triggers the warning signal, the control panel immediately activates the capacitive liquid level sensor in the second connecting cylinder corresponding to the current warning height for secondary verification detection; if the water level signal detected by the capacitive liquid level sensor is consistent with the warning height triggered by the styluses, the control panel maintains the original warning level and strengthens the alarm transmission priority; if the detected signals are inconsistent, the control panel controls the wireless signal communication module to send a "warning signal pending confirmation" prompt to the monitoring center, and drives the camera to focus and capture the on-site scene of the areas of the first and second connecting cylinders, which is simultaneously transmitted to the monitoring center to assist in manual judgment and avoid false warnings caused by a single stylus triggering mechanism.

[0020] Beneficial effects of this invention: 1. In this invention, water level data is collected in real time by an ultrasonic water level gauge, and a camera is used to simultaneously capture images of water flow and the surrounding environment. When the probe makes contact due to rising water level, the NB-IoT communication module forms a complete circuit with probe one and probe two, which can then directly send an alarm to city management personnel. This forms a multi-faceted early warning method combining remote push and on-site reminders, avoiding the inability of relevant personnel to be aware of risks in a timely manner due to a single early warning method. This significantly improves the timeliness of flood control response and buys valuable time for emergency measures such as personnel evacuation and material allocation. At the same time, the control panel will simultaneously instruct the electric push rod to push the push rod, causing support rod one to slide in the connecting groove of support rod two, automatically adjusting the overall height of connecting ring one and monitoring components. This can prevent the device from being damaged by water immersion due to subsequent water level rise, ensuring the device continues to operate stably during floods and avoiding interruption of monitoring work.

[0021] 2. In this invention, four capacitive liquid level sensors arranged in a linear array correspond to different water level monitoring thresholds. They can accurately trigger a four-level progressive early warning system based on the rise in water level, from a low-frequency audible and visual alert for the initial warning to the strongest warning for the emergency warning. The linear motor can drive the cleaning brush as needed or at set times, allowing the cleaning brush to gently remove dirt from the detection end of the ultrasonic water level gauge, ensuring the monitoring accuracy of the ultrasonic water level gauge. The protective shell protects the cleaning brush and prevents cleaning dirt from interfering with other components, improving the monitoring accuracy and stability of the device and facilitating the efficient implementation of flood prevention early warning.

[0022] 3. In this invention, during the ascent operation, the control panel can synchronously update the equipment parameters of the ultrasonic water level gauge. When the device height changes, the parameters are updated in a timely manner through the control panel to ensure that the ultrasonic water level gauge can still accurately measure the water level after ascent, thus ensuring the validity of the monitoring data. At the same time, the solar energy is converted into electrical energy by the photovoltaic panel and stored in the battery to power the various components of the device, saving energy and improving the applicability and endurance of the device in environments without external power supply, such as in the field.

[0023] 4. This invention solves the problems of traditional solutions where some devices lack the ability to flexibly adjust their height when the water level rises, are easily damaged by the rising water, leading to interruption of monitoring work, and have relatively simple early warning methods with limited warning effects. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is an exploded structural diagram of the connecting cylinder of the monitoring component of the present invention; Figure 3 This is an exploded structural diagram of the second connecting cylinder of the monitoring component of the present invention; Figure 4This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 5 An enlarged structural diagram of the area where the linear motor is located after removing the protective shell; Figure 6 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 1 ; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point a; Figure 8 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 2 ; In the diagram: 1. Connecting ring one; 2. Monitoring component; 201. Support frame; 202. Support plate; 203. Ultrasonic water level gauge; 204. Mounting bracket one; 205. Camera; 206. Connecting cylinder one; 207. Water inlet; 208. Float; 209. Protective ring; 210. Contact pin one; 211. Contact pin two; 212. Connecting cylinder two; 213. Protective frame; 214. Capacitive liquid level sensor; 3. Connecting rod; 4. Connecting ring two; 5. Sealing gasket; 6. Support rod one; 7. [Unclear text - possibly related to mounting brackets or mounting brackets] 1. Mounting slot; 2. Electric push rod; 3. Push rod; 4. Support rod II; 5. Connecting slot; 6. Mounting base; 7. Control box; 8. Display screen; 9. Control panel; 10. Audible and visual alarm; 11. Data processing module; 12. Data storage module; 13. Wireless signal communication module; 14. Fixing slot; 25. NB-IoT communication module; 26. Mounting bracket II; 27. Photovoltaic panel; 28. Battery; 29. ​​Protective shell I; 20. Linear motor; 21. Cleaning brush. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Example 1: As Figure 1-8 As shown, a water level early warning monitoring device based on NB-IoT includes a connecting ring 1 located on the upper side and a connecting ring 4 located on the lower side. The connecting ring 1 and the connecting ring 4 are fixedly connected by a connecting rod 3. A monitoring component 2 is provided on one side of the connecting ring 1. The monitoring component 2 includes a float 208 located in a connecting cylinder 206 and multiple capacitive liquid level sensors 214 located in a connecting cylinder 212. The first stylus 210 at the top of the float 208 cooperates with the second stylus 211 directly above it. The top of the second stylus 211 is connected to the bottom of the NB-IoT communication module 21. When the first stylus 210 and the second stylus 211 are in contact, the NB-IoT communication module 21, the first stylus 210, and the second stylus 211 can form a complete circuit. The output end of the capacitive liquid level sensor 214 is connected to the input end of the control box 13. The inner side of the connecting ring 1 is connected to the top of the height adjustment mechanism.

[0027] Preferably, the monitoring component 2 includes a support frame 201 fixedly connected to one side of the connecting ring 1, a support plate 202 fixedly connected to one side of the support frame 201, an ultrasonic water level gauge 203 provided on one side of the support plate 202, an mounting bracket 204 fixedly connected to the bottom of the support plate 202, and a camera 205 provided at the bottom of the mounting bracket 204.

[0028] Preferably, a connecting cylinder 206 and a connecting cylinder 212 are provided on the other side of the connecting ring 1. The side surface of the connecting cylinder 206 is provided with a water inlet 207, and a float 208 is provided inside it. Two protective rings 209 arranged in a linear array are fixedly connected to the side surface of the float 208, and a stylus 210 is fixedly connected to the top. A stylus 211 is provided above the top of the stylus 210. A protective frame 213 is provided inside the connecting cylinder 212, and four capacitive liquid level sensors 214 arranged in a linear array are fixedly connected inside the protective frame 213.

[0029] Preferably, the height adjustment mechanism includes a support rod 6 fixedly connected inside the connecting ring 1. The bottom of the support rod 6 is provided with a mounting groove 7. An electric push rod 8 is fixedly installed inside the mounting groove 7. A push rod 9 is fixedly connected to the pushing end of the bottom of the electric push rod 8.

[0030] Preferably, four connecting rods 3 arranged at four corners are fixedly connected to the bottom of the connecting ring 1, and a connecting ring 4 is fixedly connected to the bottom of the four connecting rods 3. Sealing gaskets 5 are fixedly connected to the sides of the four connecting rods 3 that are close to each other. A support rod 10 is slidably connected inside the connecting ring 4. A connecting groove 11 is formed inside the support rod 10, and the inside of the connecting groove 11 is slidably connected to the outside of the support rod 6. A mounting base 12 is fixedly connected to the bottom of the support rod 10, and the inside of the mounting base 12 is fixedly connected to the other end of the push rod 9. The sealing gaskets 5 can prevent external mud, sand, and debris from entering the device, reducing the risk of component failure.

[0031] Preferably, it also includes a cleaning mechanism, which includes a protective shell 25 fixedly connected to the bottom of the support plate 202. A linear motor 26 is provided inside the protective shell 25, and a cleaning brush 27 is fixedly connected to the pushing end of one side of the linear motor 26 through the protective shell 25.

[0032] Preferably, a second protective shell is fixedly connected to one side of the first protective shell 25. The second protective shell is located at the bottom of the cleaning brush 27 and is used to cover the bottom and sides of the cleaning brush 27 when it is idle. The top opening does not affect the movement of the cleaning brush 27 during cleaning. The linear motor 26 serves as the power source for the cleaning brush 27. Under the control panel 15, it can perform "timed cleaning" according to a preset cycle. After receiving the drive signal, the push end drives the soft wear-resistant bristles of the cleaning brush 27 to reciprocate along the detection end of the ultrasonic water level gauge 203 to remove dirt. After cleaning, it will also drive the cleaning brush 27 to return to the unobstructed area. The movement speed and stroke can be pre-calibrated. The second protective shell covers the bottom and sides of the cleaning brush 27 when it is idle to prevent rainwater erosion and mud accumulation. The top opening does not affect the movement during cleaning and can prevent falling dirt from interfering with other components.

[0033] Preferably, the control box 13 is fixedly connected to the other side of two of the connecting rods 3, and the bottom of the control box 13 is fixedly connected to the top of the connecting cylinder 212; a display screen 14 is fixedly connected to the other side of the control box 13, a control panel 15 is fixedly connected inside, and an audible and visual alarm 16 is provided on the outside, with the bottom of the audible and visual alarm 16 fixedly connected to the top of the support rod 6.

[0034] Preferably, the control panel 15 is electrically connected to a data processing module 17, a data storage module 18, and a wireless signal communication module 19. The data processing module 17 is electrically connected to the ultrasonic water level gauge 203 and the camera 205. The control box 13 is electrically connected to the display screen 14, the audible and visual alarm 16, and the electric push rod 8.

[0035] Preferably, the bottom of the control box 13 is provided with a fixing groove 20, the bottom of the fixing groove 20 is fixedly connected to the top of the connecting cylinder 206, and an NB-IoT communication module 21 is fixedly connected inside the fixing groove 20. The bottom of the NB-IoT communication module 21 is fixedly connected to the contact pin 211.

[0036] Preferably, it also includes a power supply mechanism, which includes a mounting bracket 22 fixedly connected to the other side of the connecting ring 1. A photovoltaic panel 23 is fixedly connected to the top of the mounting bracket 22, and a storage battery 24 is provided at the bottom of the photovoltaic panel 23. The photovoltaic panel 23 is electrically connected to the storage battery 24, and the storage battery 24 is fixedly connected inside the control box 13 and electrically connected to the control panel 15.

[0037] Example 2: A water level early warning monitoring method based on NB-IoT, applied to the above-mentioned device, includes the following steps: Step 1: Fix the device in key areas such as around the power station where water levels need to be monitored by using the mounting base 12. Use the four connecting rods 3, connecting ring 1, connecting ring 2 4 and the sealing gasket 5 on the nearest side to prevent external mud and debris from entering the device and reduce the risk of component failure. Step 2: After the device is started, the ultrasonic water level gauge 203 collects water level data in real time, and the camera 205 at the bottom of the mounting bracket 204 simultaneously captures on-site images of water flow and surrounding environment in the monitoring area; at the same time, the connecting cylinder 206 allows external water to enter the cylinder through the water inlet 207 on its side surface, the float 208 floats up and down with the water level, and the stylus 210 moves synchronously with the float 208; the two protective rings 209 on the side surface of the float 208 can prevent the float 208 from directly rubbing against the inner wall of the connecting cylinder 206 and causing wear.

[0038] Step 3: When the water level reaches the preset warning height, the first contact pin 210 contacts the second contact pin 211 at the top, and the NB-IoT communication module 21 forms a complete circuit with the first contact pin 210 and the second contact pin 211, so that the NB-IoT communication module 21 can send an alarm to the city management personnel and trigger the warning signal at the same time. Step 4: The collected water level data and on-site video data are transmitted to the data processing module 17 for analysis and processing. The processed data is then transmitted to the control panel 15 and stored in the data storage module 18. Simultaneously, the processed monitoring data and on-site images are transmitted to the power station's integrated automation monitoring backend via the wireless signal communication module 19, allowing power station personnel to view and access the data at any time and keep abreast of the water level dynamics. At the same time, the display screen 14 on the other side of the control box 13 and the audible and visual alarm 16 on the top of the support rod 6 issue audible and visual alarms. Step 5: The photovoltaic panel 23 converts solar energy into electrical energy and stores it in the battery 24. The battery 24 continuously supplies power to all electrical components of the device, ensuring stable operation of the device without external power supply, and ensuring that monitoring data and early warning information can be continuously transmitted to the power station's integrated automation monitoring backend, providing a scientific basis for the power station's flood control decision-making, and helping to prepare for flood control work such as personnel evacuation and material allocation in advance. Step 6: As the water level rises, water flows into connecting cylinder 212. The capacitive liquid level sensor 214 changes its capacitance due to contact with water, generating a corresponding level of electrical signal. The control panel 15, combined with preset parameters, determines the warning stage and controls the audible and visual alarm 16 to issue an alarm with the corresponding frequency and volume. The warning information is then processed, stored, and transmitted to the monitoring center. This method avoids the situation where a single warning method prevents relevant personnel from being aware of the risks in a timely manner, ensuring the timeliness of flood control response.

[0039] Step 7: If the warning stage reaches advanced or above, the control panel 15 sends a command to control the electric push rod 8 to push the push rod 9, causing the support rod 1 6 to slide in the connecting groove 11 of the support rod 2 10, adjusting the overall height of the connecting ring 1 1 and the monitoring component 2; to prevent the device from being damaged by water immersion when the water level rises later, and to ensure that the monitoring work continues.

[0040] Step 8: The linear motor 26 receives the drive signal from the control panel 15 according to the preset cycle, and drives the cleaning brush 27 to reciprocate along the detection end of the ultrasonic water level gauge 203 to remove stains. After cleaning, the cleaning brush 27 is driven to return to the unobstructed area.

[0041] Furthermore, in step 6, the four capacitive liquid level sensors 214 correspond to four warning levels: primary, intermediate, advanced, and emergency. During a primary warning, the audible and visual alarm 16 emits a low-frequency, low-volume audible and visual alarm. During an intermediate warning, the frequency and volume of the audible and visual alarm are increased. During an advanced warning, the audible and visual alarm 16 continuously alarms at a high frequency and high volume, and the control panel 15, in conjunction with the electric push rod 8, adjusts the device height, transmitting the warning information with higher priority. During an emergency warning, the audible and visual alarm 16 emits the strongest audible and visual warning. The specific working process of step 6 is as follows: During operation, as the water level in the monitored area gradually rises, water flows into the connecting cylinder 212. When the water level reaches the lowest position of the first capacitive level sensor 214, the sensor's capacitance changes due to contact with water, generating a first-level electrical signal that is transmitted to the control panel 15 inside the control box 13. The control panel 15 receives the signal and, based on preset parameters, determines that the water level is in the initial warning stage. It then controls the audible and visual alarm 16 to emit a low-frequency, low-volume audible and visual alarm. Simultaneously, this warning information is processed by the data processing module 17 and stored in the data storage module 18, while also being remotely transmitted to the monitoring center via the wireless signal communication module 19. If the water level continues to rise to the position of the second capacitive level sensor 214, this sensor also generates a second-level electrical signal due to a change in capacitance. After receiving the data, panel 15 determines that the water level has entered the intermediate warning stage and controls the audible and visual alarm 16 to increase the frequency and volume of the alarm. At the same time, it updates the warning data and transmits it to the monitoring center and storage. When the water level continues to rise and reaches the third capacitive liquid level sensor 214, the third-level electrical signal is triggered, and control panel 15 starts the advanced warning. The audible and visual alarm 16 continuously alarms at a high frequency and high volume. At this time, control panel 15 will also link the electric push rod 8 to prepare for adjusting the height of the device. The relevant warning information will also be transmitted through the wireless signal communication module 19 with a higher priority to ensure that the monitoring center can obtain it in time. If the water level rises further to the fourth capacitive liquid level sensor 214 at the highest position, a fourth-level emergency warning signal is generated. Control panel 15 immediately triggers the highest-level alarm, and audible and visual alarm 16 emits the strongest audible and visual warning.

[0042] Furthermore, it also includes step 9: After the support rod 6 drives the monitoring component 2 to complete the height adjustment in step 5, the control panel 15 automatically collects the displacement data of this height adjustment and transmits the displacement data to the data processing module 17; the data processing module 17 synchronously corrects the measurement reference parameters of the ultrasonic water level gauge 203 based on the displacement data, and the corrected parameters are fed back to the control panel 15 and stored in the data storage module 18 to ensure that the ultrasonic water level gauge 203 can still accurately collect water level data with the corrected reference parameters at the new height, and compensate for the measurement error caused by the height change.

[0043] Furthermore, step 10 is also included: After the first stylus 210 and the second stylus 211 contact to trigger the warning signal in step 3, the control panel 15 immediately activates the capacitive liquid level sensor 214 in the second connecting cylinder 212, which corresponds to the current warning height, to perform secondary verification detection; if the water level signal detected by the capacitive liquid level sensor 214 is consistent with the warning height triggered by the stylus, the control panel 15 maintains the original warning level and strengthens the alarm transmission priority; if the detected signals are inconsistent, the control panel 15 controls the wireless signal communication module 19 to send a "warning signal pending confirmation" prompt to the monitoring center, and drives the camera 205 to focus and capture the on-site image of the area of ​​the first connecting cylinder 206 and the second connecting cylinder 212, and transmits it synchronously to the monitoring center to assist in manual judgment, so as to avoid false warnings caused by a single stylus triggering mechanism.

[0044] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A water level early warning monitoring device based on NB-IoT, comprising a connecting ring one (1) located on the upper side and a connecting ring two (4) located on the lower side, wherein the connecting ring one (1) and the connecting ring two (4) are fixedly connected by a connecting rod (3), characterized in that, A monitoring component (2) is provided on one side of the connecting ring (1). The monitoring component (2) includes a float (208) in the connecting cylinder (206) and multiple capacitive liquid level sensors (214) in the connecting cylinder (212). The first stylus (210) at the top of the float (208) cooperates with the second stylus (211) directly above it. The top of the second stylus (211) is connected to the bottom of the NB-IoT communication module (21). When the first stylus (210) and the second stylus (211) are in contact, the NB-IoT communication module (21) can form a complete circuit with the first stylus (210) and the second stylus (211). The output end of the capacitive liquid level sensor (214) is connected to the input end of the control box (13). The inner side of the connecting ring (1) is connected to the top of the height adjustment mechanism.

2. The water level early warning and monitoring device based on NB-IoT according to claim 1, characterized in that: The monitoring component (2) includes a support frame (201) fixedly connected to one side of the connecting ring (1), a support plate (202) fixedly connected to one side of the support frame (201), an ultrasonic water level gauge (203) provided on one side of the support plate (202), an mounting frame (204) fixedly connected to the bottom of the support plate (202), and a camera (205) provided at the bottom of the mounting frame (204).

3. The water level early warning and monitoring device based on NB-IoT according to claim 2, characterized in that: On the other side of the connecting ring 1 (1), there is a connecting cylinder 1 (206) and a connecting cylinder 2 (212). The side surface of the connecting cylinder 1 (206) is provided with a water inlet (207), and a float (208) is provided inside it. Two protective rings (209) arranged in a linear array are fixedly connected to the side surface of the float (208), and a stylus 1 (210) is fixedly connected to the top. A stylus 2 (211) is provided above the top of the stylus 1 (210). A protective frame (213) is provided inside the connecting cylinder 2 (212), and four capacitive liquid level sensors (214) arranged in a linear array are fixedly connected inside the protective frame (213).

4. The water level early warning and monitoring device based on NB-IoT according to claim 1, characterized in that: The height adjustment mechanism includes a support rod (6) fixedly connected inside the connecting ring (1). The bottom of the support rod (6) is provided with an installation groove (7). An electric push rod (8) is fixedly installed inside the installation groove (7). A push rod (9) is fixedly connected to the push end of the bottom of the electric push rod (8).

5. A water level early warning and monitoring device based on NB-IoT according to claim 4, characterized in that: The bottom of the first connecting ring (1) is fixedly connected to four connecting rods (3) arranged in a four-corner pattern. The bottom of the four connecting rods (3) is fixedly connected to the second connecting ring (4). The sides of the four connecting rods (3) that are close to each other are fixedly connected to sealing gaskets (5). The second connecting ring (4) is slidably connected to the second supporting rod (10). The second supporting rod (10) has a connecting groove (11) inside. The inside of the connecting groove (11) is slidably connected to the outside of the first supporting rod (6). The bottom of the second supporting rod (10) is fixedly connected to the mounting base (12). The inside of the mounting base (12) is fixedly connected to the other end of the push rod (9).

6. The water level early warning and monitoring device based on NB-IoT according to claim 2, characterized in that: It also includes a cleaning mechanism, which includes a protective shell (25) fixedly connected to the bottom of the support plate (202). A linear motor (26) is installed inside the protective shell (25), and a cleaning brush (27) is fixedly connected to the pushing end of one side of the linear motor (26) through the protective shell (25).

7. The NB-IoT-based water level early warning and monitoring device according to claim 6, characterized in that, A second protective shell is fixedly connected to one side of the first protective shell (25). The second protective shell is set at the bottom of the cleaning brush (27) and is used to cover the bottom and sides of the cleaning brush (27) when it is idle. The top opening does not affect the operation of the cleaning brush (27) during cleaning.

8. The NB-IoT-based water level early warning and monitoring device according to claim 1, characterized in that, The control box (13) is fixedly connected to the other side of two of the connecting rods (3), and the bottom of the control box (13) is fixedly connected to the top of the connecting cylinder (212); a display screen (14) is fixedly connected to the other side of the control box (13), a control panel (15) is fixedly connected inside, and an audible and visual alarm (16) is provided on the outside. The bottom of the audible and visual alarm (16) is fixedly connected to the top of the support rod (6).

9. The NB-IoT-based water level early warning and monitoring device according to claim 8, characterized in that, The control panel (15) is electrically connected to a data processing module (17), a data storage module (18), and a wireless signal communication module (19). The data processing module (17) is electrically connected to an ultrasonic water level gauge (203) and a camera (205). The control box (13) is electrically connected to a display screen (14), an audible and visual alarm (16), and an electric push rod (8).

10. The NB-IoT-based water level early warning and monitoring device according to claim 1, characterized in that, The bottom of the control box (13) is provided with a fixing groove (20), the bottom of the fixing groove (20) is fixedly connected to the top of the connecting cylinder (206), and the NB-IoT communication module (21) is fixedly connected inside the fixing groove (20). The bottom of the NB-IoT communication module (21) is fixedly connected to the second contact pin (211).

11. The NB-IoT-based water level early warning and monitoring device according to claim 1, characterized in that, It also includes a power supply mechanism, which includes a mounting bracket (22) fixedly connected to the other side of the connecting ring (1). A photovoltaic panel (23) is fixedly connected to the top of the mounting bracket (22), and a storage battery (24) is provided at the bottom of the photovoltaic panel (23). The photovoltaic panel (23) is electrically connected to the storage battery (24), and the storage battery (24) is fixedly connected inside the control box (13) and electrically connected to the control panel (15).

12. A water level early warning and monitoring method based on NB-IoT, applied to the device described in any one of claims 1-11, characterized in that, Includes the following steps: Step 1: Fix the device in key areas such as the power station where water levels need to be monitored by installing the base (12). Use four connecting rods (3), connecting ring one (1), connecting ring two (4) and sealing gaskets (5) on the adjacent side to prevent external mud and debris from entering the device. Step 2: After the device is started, the ultrasonic water level gauge (203) collects water level data in real time, and the camera (205) at the bottom of the mounting bracket (204) simultaneously captures the on-site images of water flow and surrounding environment in the monitoring area; at the same time, the connecting tube (206) allows external water to enter the tube through the water inlet (207) on the side surface, the float (208) floats up and down with the water level change, and the stylus (210) moves synchronously with the float (208); Step 3: When the water level reaches the preset warning height, the first contact pin (210) contacts the second contact pin (211) at the top, and the NB-IoT communication module (21) forms a complete circuit with the first contact pin (210) and the second contact pin (211), sending an alarm to the city management personnel and triggering a warning signal; Step 4: The collected water level data and on-site image data are transmitted to the data processing module (17) for analysis and processing. The processed data is transmitted to the control panel (15), which stores it in the data storage module (18). At the same time, the processed monitoring data and on-site images are transmitted to the power plant integrated monitoring backend through the wireless signal communication module (19), and the display screen (14) and the sound and light alarm (16) are controlled to issue sound and light alarms. Step 5: The photovoltaic panel (23) converts solar energy into electrical energy and stores it in the battery (24), which continuously supplies power to all electrical components of the device; Step 6: As the water level rises, the water flows into the connecting cylinder 2 (212). The capacitive liquid level sensor (214) generates an electrical signal of the corresponding level due to the change in capacitance value caused by contact with water. The control panel (15) judges the warning stage in combination with the preset parameters, controls the sound and light alarm (16) to issue an alarm with the corresponding frequency and volume, and processes, stores and transmits the warning information to the monitoring center. Step 7: If the warning stage reaches advanced or above, the control panel (15) sends a command to control the electric push rod (8) to push the push rod (9), causing the support rod one (6) to slide in the connecting groove (11) of the support rod two (10), and adjust the overall height of the connecting ring one (1) and the monitoring component (2); Step 8: The linear motor (26) receives the drive signal from the control panel (15) according to the preset cycle, and drives the cleaning brush (27) to reciprocate along the detection end of the ultrasonic water level gauge (203) to remove stains. After cleaning, the cleaning brush (27) is driven to return to the non-obstructed area.

13. The water level early warning and monitoring method based on NB-IoT according to claim 12, characterized in that, In step 6, the four capacitive liquid level sensors (214) correspond to the four warning stages of primary, intermediate, advanced and emergency, respectively. During the primary warning, the audible and visual alarm (16) emits a low-frequency, low-volume audible and visual alarm. During the intermediate warning, the frequency and volume of the audible and visual alarm are increased. During the advanced warning, the audible and visual alarm (16) continuously alarms at a high frequency and high volume, and the control panel (15) is linked to the electric push rod (8) to adjust the height of the device. The warning information is transmitted with a higher priority. During the emergency warning, the audible and visual alarm (16) emits the strongest audible and visual warning.

14. The water level early warning and monitoring method based on NB-IoT according to claim 12, characterized in that, It also includes step 9: After the support rod (6) drives the monitoring component (2) to complete the height adjustment in step 5, the control panel (15) automatically collects the displacement data of this height adjustment and transmits the displacement data to the data processing module (17); the data processing module (17) synchronously corrects the measurement reference parameters of the ultrasonic water level gauge (203) based on the displacement data, and the corrected parameters are fed back to the control panel (15) and stored in the data storage module (18) to ensure that the ultrasonic water level gauge (203) can still accurately collect water level data with the corrected reference parameters at the new height, and compensate for the measurement error caused by the height change.

15. The water level early warning and monitoring method based on NB-IoT according to claim 12, characterized in that, The procedure also includes step 10: After the contact between the first stylus (210) and the second stylus (211) in step 3 triggers the warning signal, the control panel (15) immediately activates the capacitive liquid level sensor (214) in the second connecting cylinder (212) corresponding to the current warning height for secondary verification detection. If the water level signal detected by the capacitive liquid level sensor (214) is consistent with the warning height triggered by the stylus, the control panel (15) maintains the original warning level and strengthens the alarm transmission priority. If the detected signals are inconsistent, the control panel (15) controls the wireless signal communication module (19) to send a "warning signal pending confirmation" prompt to the monitoring center and drives the camera (205) to focus and capture the scene of the area of ​​the first connecting cylinder (206) and the second connecting cylinder (212), and transmits it to the monitoring center simultaneously to assist in manual judgment and avoid false warnings caused by a single stylus triggering mechanism.

Images