An automatic operation and maintenance device and method for rain gauges at hydrological stations

Abstract

This invention relates to an automatic operation and maintenance device and method for rain gauges at hydrological stations, solving the problem of the high manpower required for maintaining the cleanliness of rain gauges operating outdoors and for periodic calibration of measurement accuracy. The device includes a vehicle body with a first column mounted on it. A cantilever beam is mounted on one side of the top of the first column, and a camera is mounted on the outer end of the cantilever beam facing downwards. The vehicle body also has a liftable second column with a swing arm at its top that swings horizontally. A fixed rod is mounted on the outer end of the swing arm facing downwards. A rotatable cleaning head is mounted on the outer side of the fixed rod. The lower surface of the cleaning head is a conical curved surface adapted to the rain collector. The fixed rod is a hollow rod with a telescopically extending air jet rod passing through its central hole. The bottom end of the air jet rod is an air jet head with air jet holes evenly distributed around its circumference. This invention enables automatic operation and maintenance of rain gauges, and the cleaning head and air jet rod can cooperate to improve cleaning efficiency.

Description

Technical Field

[0001] This invention belongs to the field of hydrological equipment maintenance devices, and relates to an automatic maintenance device for rain gauges, particularly an automatic operation and maintenance device and method for rain gauges at hydrological stations. Background Technology

[0002] Hydrological departments are responsible for monitoring regional hydrological elements, with precipitation being a crucial monitoring factor. Real-time precipitation monitoring helps urban management departments better understand rainfall distribution, intensity, and evolution patterns, enabling them to accurately and effectively respond to extreme weather events such as torrential rains and floods, minimizing disaster losses. Furthermore, rainfall data is of significant value for urban infrastructure construction, water resource management, and ecological environmental protection, contributing to sustainable urban development.

[0003] Hydrological departments typically record precipitation data by setting up hydrological stations and installing rain gauges at these stations to record and verify the data. Currently, the most commonly used rain gauge is the tipping bucket self-recording rain gauge. Operating in open, outdoor environments, this type of rain gauge must be kept level. Ideally, the water-passing components, such as the rain catcher and internal parts (funnel, tipping bucket, etc.), should be kept clean and dust-free for accurate and effective measurements. In reality, however, fallen leaves from nearby trees, bird droppings, and environmental dust can clog the water-passing components, preventing natural precipitation from passing through in a timely manner and affecting the accuracy of rainfall monitoring. Precipitation amounts at the same time can vary in different locations within the same region. Therefore, to comprehensively record regional precipitation data, it is necessary to set up as many hydrological stations as possible to record precipitation. Traditionally, maintenance personnel are dispatched to regularly inspect, clean, and calibrate the rain gauges at each hydrological station. Because there are many hydrological stations recording rainfall, and the hydrological department has limited personnel, cleaning and calibrating rain gauges alone requires a significant amount of manpower and resources. This is especially true before the flood season, when the window of opportunity for maintenance personnel to clean and calibrate is limited, making the task particularly time-sensitive and demanding. Therefore, implementing automated operation and maintenance of rain gauges can effectively reduce the frequency of staff inspections, decrease labor intensity, and reduce personnel requirements. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of the high manpower required for maintaining the cleanliness and regularly verifying the measurement accuracy of rain gauges operating outdoors. It provides an automated operation and maintenance device and method for rain gauges at hydrological stations. This device utilizes automated equipment for cleaning and verification of rain gauges, meeting daily cleaning and verification needs. Maintenance personnel are only notified when cleaning is ineffective or verification errors are significant, greatly reducing the frequency of maintenance inspections, lowering staffing requirements, and meeting the need for comprehensive cleaning and verification of rain gauges before the flood season.

[0005] The technical solution adopted by this invention to solve its technical problem is: an automatic operation and maintenance device for a hydrological station rain gauge, used for rain gauge operation and maintenance. The rain gauge has an upward-opening rainwater collector at its top, with a funnel-shaped bottom and a raised insect-proof net at its center. The operation and maintenance device includes a vehicle body with a first column on it. A cantilever beam is mounted on the top of the first column, with a camera mounted downwards at the outer end of the cantilever beam. The vehicle body also has a liftable second column with a swing arm that swings horizontally at its top. A fixed rod is mounted downwards at the outer end of the swing arm, and a rotatable cleaning head is mounted on the outer side of the fixed rod. The lower surface of the cleaning head is a conical surface adapted to the rain gauge. The fixed rod is hollow, with a jetting rod passing through its central hole. The air pump is retractable and points downwards. The upper end of the air pump is connected to a high-pressure air source via an air pipe. The bottom end of the air pump has an air head with a groove at the center of its bottom surface that covers the outside of the insect net. Air holes are evenly distributed around the circumference of the air head. A cleaning cylinder is installed on the upper surface of the vehicle body. The cleaning cylinder opens upwards and has a spray nozzle on its side wall, which is connected to a water tank. A rotating block is installed on the bottom surface of the cleaning cylinder, and a motor is connected to the bottom end of the rotating block. A gripper is installed on the rotating block that abuts against the surface of the cleaning head and drives the cleaning head to rotate. A drain outlet is installed at the bottom end of the cleaning cylinder and is connected to a wastewater tank. The water tank and the high-pressure air source are located inside the vehicle body. When the swing arm swings outwards, the fixed rod aligns with the upper camera. When the swing arm swings inwards, the cleaning head aligns with the lower cleaning cylinder.

[0006] The rain collector has a funnel-shaped structure with an upward-protruding insect-proof net at the center of its bottom. The net is surrounded by rainwater holes, allowing rainwater to pass through while preventing insects from entering. The cleaning head is made of a flexible material. During automated operation, the cleaning head must not leave obvious water stains on the rain collector surface to avoid affecting the rain gauge's rainfall data. When the air jet blows air, there should be no significant downward airflow through the rain collector to avoid pushing the tipping bucket inside the rain gauge. Therefore, the cleaning head needs to rotate at high speed to dry the rain collector before cleaning. When blowing air, the rain collector's drain outlet needs to be blocked. During airflow, the cleaning head slowly descends, continuously narrowing the gap between it and the rain collector to ensure airflow velocity and improve the airflow's ability to clean dust, leaves, and other debris from the rain collector surface. This device utilizes vehicle-mounted navigation and pathfinding solutions, and the camera is used for vertical alignment with the rain collector and cleaning head, as well as for image recognition of the rain collector's cleaning status.

[0007] Preferably, a calibration water inlet is provided at the outer end of the cantilever beam on the side of the camera. The calibration water inlet is connected to a water tank via a metering pump. After cleaning, water can be metered into the rain gauge through the calibration water inlet, and the rain gauge data can be read to complete the calibration. To prevent water from splashing out, an extension hose can be added to the calibration water inlet to reduce the distance between the outlet and the rain collector.

[0008] Preferably, the second column is centrally located on one side of the vehicle body, and the swing arm on the second column has a swing angle of 180 degrees.

[0009] Preferably, a sliding sleeve is provided inside the vehicle body, and the second column is connected to the sliding sleeve by a lifting screw.

[0010] Preferably, a rotary bearing is provided between the outer wall of the fixing rod and the inner wall of the cleaning head.

[0011] Preferably, the cleaning head is open from top to bottom in the middle, and the opening at the lower end of the cleaning head is not less than the outer diameter of the jet head.

[0012] Preferably, the outer diameter of the jet head is larger than the outer diameter of the jet rod.

[0013] Preferably, the vehicle body is equipped with wheels at the bottom, and the hydrological station is equipped with a parking area and a rain gauge, with navigation markings between the parking area and the rain gauge.

[0014] An automatic operation and maintenance method for rain gauges at hydrological stations, using the aforementioned automatic operation and maintenance device for rain gauges at hydrological stations, includes the following steps:

[0015] S1, the vehicle body is ready. At this time, the jet rod retracts upward, the jet head retracts into the cleaning head, the swing arm swings inward, the second column descends, and the cleaning head is placed inside the cleaning cylinder.

[0016] S2, the vehicle moves to the position of the rain gauge, the camera aligns with the center of the rain gauge's rain catcher through image recognition, the second column rises, and the cleaning head comes out of the cleaning cylinder; the swing arm swings outward, swinging until the fixed rod at the center of the cleaning head is aligned vertically with the camera, and a positioning point is set on the upper surface of the swing arm, which is aligned vertically with the fixed rod to facilitate camera recognition;

[0017] S3, the jet rod extends downwards, and then the second column slowly descends until the jet head covers the insect screen of the rain collector. The high-pressure air source is activated, and the jet nozzles spray air around the circumference, blowing the floating dust and debris on the surface of the rain collector around the circumference.

[0018] S4, the jet nozzle continues to spray air, the second column continues to descend, and the cleaning head descends at the same time. The jet rod retracts synchronously to keep the jet head covering the insect net. The cleaning head and the rain collector keep getting closer and closer, so that the gap between the lower surface of the cleaning head and the rain collector keeps narrowing. As the gap between the lower surface of the cleaning head and the rain collector narrows, the airflow from the jet nozzle increases continuously, and the airflow cleaning effect is continuously improved.

[0019] S5, the cleaning head is in contact with the rain collector, the jet bar detects a sharp rise in jet back pressure, the jet hole stops jetting, and the cleaning head adheres to and cleans the debris on the surface of the rain collector that cannot be blown away by the airflow.

[0020] S6, the second column rises, the swing arm swings inward to align the cleaning head with the cleaning cylinder, and at the same time the jet nozzle retracts into the cleaning head. Then the second column descends to lower the cleaning head into the cleaning cylinder. The cleaning head moves downward against the gripper, and the spray nozzle sprays water to rinse the cleaning head. After the water spraying is completed, the motor drives the rotating block, and the rotating block drives the cleaning head to rotate at high speed through the gripper to spin dry the cleaning head.

[0021] S7. The rain collector is inspected by image recognition through the camera. If the rain collector needs to be cleaned again, S2-S6 are repeated. If the requirements are still not met after three cleanings, manual inspection is notified. If the rain collector has been cleaned, the water inlet is checked to add water to the rain collector in a metered manner, the rain gauge detection data is recorded, and the accuracy is checked.

[0022] S8: After completing the maintenance of one rain gauge, the vehicle moves to the next rain gauge location and repeats S2-S7 to perform the maintenance of the next rain gauge.

[0023] After all rain gauges have been maintained, the S9 vehicle returns to the parking area.

[0024] Preferably, in S2, a layer of cleaning gel is sprayed onto the surface of the cleaning head before it is removed from the cleaning cylinder.

[0025] This invention enables automatic maintenance of rain gauges through a dual cleaning process involving airflow and adhesion to the cleaning head. The cleaning head and air jet bar can work together to enhance the airflow cleaning effect. The cleaning sequence of airflow followed by adhesion ensures effective cleaning of the rain catcher and reduces the amount of dirt adhering to the cleaning head, thus reducing the need for cleaning the cleaning head. This device can also verify the measurement accuracy of the rain gauge after cleaning is completed. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of one structure of the present invention.

[0028] Figure 2 This is an enlarged schematic diagram of a cleaning head structure according to the present invention.

[0029] Figure 3 This is a schematic diagram of the extended state of the jet rod according to the present invention.

[0030] Figure 4 This is a schematic diagram of the cleaning head in a sunken state according to the present invention.

[0031] Figure 5 This is a schematic diagram of a cleaning head adhering to the surface of a rain collector according to the present invention.

[0032] Figure 6 This is a schematic diagram of the inward swinging state of the swing arm according to the present invention.

[0033] Figure 7 This is a schematic diagram of the cleaning head in the cleaning state according to the present invention.

[0034] Figure 8 This is a top view schematic diagram of a vehicle body according to the present invention.

[0035] Figure 9 This is a schematic diagram of parking guidance according to the present invention.

[0036] In the diagram: 1. Rain gauge, 2. Rain catcher, 3. Vehicle body, 4. High-pressure air source, 5. Water tank, 6. Sewage tank, 7. Motor, 8. Rotating block, 9. Cleaning cylinder, 10. Sliding sleeve, 11. Second column, 12. Air pipe, 13. Swing arm, 14. Fixing rod, 15. Cleaning head, 16. Air jet head, 17. First column, 18. Cantilever beam, 19. Camera, 20. Bearing, 21. Air jet hole, 22. Groove, 23. Water filling pipe, 24. Parking area, 25. Navigation markings, 26. Insect net, 27. Calibration water filling port, 28. Extension hose, 29. Air jet bar. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0038] Example 1: An automatic operation and maintenance device for rain gauges at hydrological stations, such as... Figure 1 , 2 As shown in Figure 8. This device is used for the operation and maintenance of rain gauge 1 in hydrological stations, such as... Figure 9 As shown, taking a hydrological station with two rain gauges 1 as an example, the rain gauges are tipping-bucket type rain gauges. A rain collector 2 is installed facing upwards on the rain gauge 1. The rain collector, with its top opening upwards, collects rainwater. The bottom of the rain collector is funnel-shaped, and a raised insect-proof net 26 is installed upwards at the center of the rain collector. The insect-proof net has rainwater holes around its circumference that allow rainwater to pass through. The maintenance equipment includes a vehicle body 3, which is parked in the parking area 24 within the hydrological station. Navigation markings 25 are installed between the parking area and each rain gauge 1.

[0039] like Figure 1-7 As shown, a first column 17 is installed on the vehicle body 3. A cantilever beam 18 is installed at the top of the first column 17 towards one side of the vehicle body. A camera 19 is installed at the outer end of the cantilever beam 18 facing downwards. A calibration water inlet 27 is installed at the outer end of the cantilever beam 18 next to the camera 19. The calibration water inlet 27 is connected to the water tank 5 through a water inlet pipe 23. Water is pumped from the calibration water inlet 27 by a metering pump. The metering pump is a common metering pump with a conventional structure, which is not shown in the figure. A flow meter can also be installed at the calibration water inlet. To prevent water from splashing out, an extension hose 28 can be added to the calibration water inlet 27 to reduce the distance between the outlet of the extension hose and the rain collector 2. The first column 17 is installed at one corner of the vehicle body, and the cantilever beam is installed diagonally to the side towards the center of the vehicle body.

[0040] The vehicle body 3 is also equipped with a liftable second column 11. A swing arm 13 that swings horizontally is located at the top of the second column 11. The second column 11 is centrally located on one side of the vehicle body 3, and the swing arm on the second column swings at an angle of 180 degrees. A sliding sleeve 10 is installed inside the vehicle body 3, and the second column 11 and the sliding sleeve 10 are connected by a lifting screw. The swing arm is driven to rotate by a swing arm motor, which is located inside the swing arm or can be inverted and positioned above the swing arm's pivot. A fixing rod 14 is installed downwards at the outer end of the swing arm 13. A rotatable cleaning head 15 is installed on the outer side of the fixing rod 14, and the lower surface of the cleaning head is a conical surface adapted to the rain collector 2. A rotary bearing 20 is installed between the outer wall of the fixing rod 14 and the inner wall of the cleaning head 15. The fixing rod 14 is a hollow rod, and an air jet rod 29 passes through the central hole of the fixing rod 14. Figure 2 As shown, the jet rod 29 is retractable and points downwards. The upper end of the jet rod 29 is connected to a high-pressure air source 4 via an air pipe 12. A jet head 16 is located at the bottom end of the jet rod. A groove 22, covering the outside of the insect-proof net 26, is located at the center of the bottom surface of the jet head 16. Jet holes 21 are evenly distributed around the circumference of the jet head. The outer diameter of the jet head 22 is larger than the outer diameter of the jet rod 29. The cleaning head 15 is continuous from top to bottom in the middle, and the opening at the lower end of the cleaning head 15 is not smaller than the outer diameter of the jet head 16.

[0041] The upper surface of the vehicle body 3 is provided with a cleaning cylinder 9, which opens upwards. The side wall of the cleaning cylinder is provided with a spray nozzle, which is connected to a water tank 5. The bottom surface of the cleaning cylinder is provided with a rotating block 8, and the bottom end of the rotating block is connected to a motor 7. The rotating block is provided with a gripper that abuts against the surface of the cleaning head and drives the cleaning head to rotate. The bottom end of the cleaning cylinder is provided with a drain outlet, which is connected to a sewage tank 6.

[0042] The water tank 5 and the high-pressure air source 4 are located inside the vehicle body 3; the sewage tank 6 is hung outside the vehicle body. When the swing arm 13 swings outward, the fixed rod 14 is aligned with the upper camera 19; when the swing arm swings inward, the cleaning head 15 is aligned with the lower cleaning cylinder 9.

[0043] Example 2: An automatic operation and maintenance method for rain gauges at hydrological stations, using the device described in Example 1, includes the following steps:

[0044] S1, the vehicle body is ready. At this time, the jet rod retracts upward, the jet head retracts into the cleaning head, the swing arm swings inward, the second column descends, and the cleaning head is placed inside the cleaning cylinder.

[0045] S2, the vehicle moves to the rain gauge position, and the camera aligns with the center of the rain gauge's rain catcher through image recognition. The second column rises, and the cleaning head detaches from the cleaning cylinder. Before detaching, a layer of cleaning gel is sprayed onto the surface of the cleaning head. The swing arm swings outward until the fixed rod at the center of the cleaning head aligns vertically with the camera. Positioning points are set on the upper surface of the swing arm, and these points are aligned vertically with the fixed rod for easy camera recognition. Figure 1 As shown;

[0046] S3, as Figure 2 , 3 As shown, the jet rod extends downwards, and then the second column slowly descends until the jet head covers the insect screen of the rain collector. The high-pressure air source is activated, and the jet nozzles spray air around the circumference, blowing the floating dust and debris on the surface of the rain collector around the circumference.

[0047] S4, the jet nozzle continues to spray air, the second column continues to descend, and simultaneously the cleaning head descends. The jet rod retracts synchronously, keeping the jet head covering the insect net. The cleaning head continuously approaches the rain collector, causing the gap between the lower surface of the cleaning head and the rain collector to continuously narrow. As the gap between the lower surface of the cleaning head and the rain collector narrows, the airflow from the jet nozzle continuously increases in velocity, and the airflow cleaning effect continuously improves. Figure 4 As shown;

[0048] S5, the cleaning head adheres to the rain collector, the jet bar detects a sharp increase in jet back pressure, the jet orifice stops jetting, and the cleaning head adheres to and cleans debris from the rain collector surface that could not be blown away by the airflow; such as Figure 5 As shown;

[0049] S6, the second column rises, the swing arm swings inward to align the cleaning head with the cleaning cylinder, and the jet nozzle retracts into the cleaning head. Then, the second column descends, lowering the cleaning head into the cleaning cylinder. The cleaning head presses downward against the gripper, and water sprays from the spray nozzle to rinse the cleaning head. After spraying, the motor drives the rotating block, which, through the gripper, drives the cleaning head to rotate at high speed to spin-dry it. Figure 6 , 7 As shown;

[0050] S7. The rain collector is inspected by image recognition through the camera. If the rain collector needs to be cleaned again, S2-S6 are repeated. If the requirements are still not met after three cleanings, manual inspection is notified. If the rain collector has been cleaned, the water inlet is checked to add water to the rain collector in a metered manner, the rain gauge detection data is recorded, and the accuracy is checked.

[0051] S8: After completing the maintenance of one rain gauge, the vehicle moves to the next rain gauge location and repeats S2-S7 to perform the maintenance of the next rain gauge.

[0052] After all rain gauges have been maintained, the S9 vehicle returns to the parking area.

Claims

1. An automatic operation and maintenance device for a hydrological station rain gauge, used for rain gauge operation and maintenance, wherein a rain collector with an upward-opening top is provided on the top of the rain gauge to collect rainwater, the bottom of the rain collector is funnel-shaped, and a raised insect-proof net is provided in the center of the rain collector, the operation and maintenance device includes a vehicle body, characterized in that: The vehicle body is equipped with a first column, with a cantilever beam extending to one side at the top of the first column. A camera is mounted on the outer end of the cantilever beam facing downwards. The vehicle body also has a second column that can be raised and lowered. A swing arm that swings horizontally at the top of the second column has a fixed rod at the outer end of the swing arm facing downwards. A rotatable cleaning head is mounted on the outer side of the fixed rod. The lower surface of the cleaning head is a conical surface adapted to the rain collector. The fixed rod is hollow, with a jet rod passing through its central hole. The jet rod is retractable downwards, with its upper end connected to a high-pressure air source via an air pipe. A jet nozzle is mounted at the bottom end of the jet rod, with a centrally located... The device has a groove on the outside of the insect-proof net, and air jets are evenly distributed around the circumference of the air jet head. A cleaning cylinder is installed on the upper surface of the vehicle body, with the cylinder opening upwards. Spray nozzles are provided on the side wall of the cleaning cylinder and connected to a water tank. A rotating block is installed on the bottom surface of the cleaning cylinder, and a motor is connected to the bottom end of the rotating block. A gripper is installed on the rotating block that abuts against the surface of the cleaning head and drives the cleaning head to rotate. A drain outlet is provided at the bottom end of the cleaning cylinder and connected to a wastewater tank. The water tank and high-pressure air source are located inside the vehicle body. When the swing arm swings outwards, the fixed rod is aligned with the upper camera. When the swing arm swings inwards, the cleaning head is aligned with the lower cleaning cylinder.

2. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The outer end of the cantilever beam is equipped with a calibration water inlet on the side of the camera, and the calibration water inlet is connected to the water tank through a metering pump.

3. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The second pillar is centrally located on one side of the vehicle body, and the swing arm on the second pillar has a swing angle of 180 degrees.

4. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The vehicle body is equipped with a sliding sleeve, and the second column is connected to the sliding sleeve by a lifting screw.

5. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: A rotary bearing is provided between the outer wall of the fixing rod and the inner wall of the cleaning head.

6. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The cleaning head is open from top to bottom in the middle, and the opening at the lower end of the cleaning head is not less than the outer diameter of the jet head.

7. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The outer diameter of the jet head is larger than the outer diameter of the jet rod.

8. The automatic operation and maintenance device for a hydrological station rain gauge according to claim 1, characterized in that: The vehicle is equipped with wheels at the bottom, and the hydrological station is equipped with a parking area and a rain gauge. Navigation lines are set between the parking area and the rain gauge.

9. An automatic operation and maintenance method for rain gauges at hydrological stations, using the automatic operation and maintenance device for rain gauges at hydrological stations as described in any one of claims 1-8, characterized in that: Includes the following steps: S1, the vehicle body is ready. At this time, the jet rod retracts upward, the jet head retracts into the cleaning head, the swing arm swings inward, the second column descends, and the cleaning head is placed inside the cleaning cylinder. S2, the vehicle moves to the position of the rain gauge, the camera aligns with the center of the rain gauge's rain catcher through image recognition, the second column rises, and the cleaning head comes out of the cleaning cylinder; the swing arm swings outward, swinging until the fixed rod at the center of the cleaning head is aligned vertically with the camera, and a positioning point is set on the upper surface of the swing arm, which is aligned vertically with the fixed rod to facilitate camera recognition; S3, the jet rod extends downwards, and then the second column slowly descends until the jet head covers the insect screen of the rain collector. The high-pressure air source is activated, and the jet nozzles spray air around the circumference, blowing the floating dust and debris on the surface of the rain collector around the circumference. S4, the jet nozzle continues to spray air, the second column continues to descend, and the cleaning head descends at the same time. The jet rod retracts synchronously to keep the jet head covering the insect net. The cleaning head and the rain collector keep getting closer and closer, so that the gap between the lower surface of the cleaning head and the rain collector keeps narrowing. As the gap between the lower surface of the cleaning head and the rain collector narrows, the airflow from the jet nozzle increases continuously, and the airflow cleaning effect is continuously improved. S5, the cleaning head is in contact with the rain collector, the jet bar detects a sharp rise in jet back pressure, the jet hole stops jetting, and the cleaning head adheres to and cleans the debris on the surface of the rain collector that cannot be blown away by the airflow. S6, the second column rises, the swing arm swings inward to align the cleaning head with the cleaning cylinder, and at the same time the jet nozzle retracts into the cleaning head. Then the second column descends to lower the cleaning head into the cleaning cylinder. The cleaning head moves downward against the gripper, and the spray nozzle sprays water to rinse the cleaning head. After the water spraying is completed, the motor drives the rotating block, and the rotating block drives the cleaning head to rotate at high speed through the gripper to spin dry the cleaning head. S7. The rain collector is inspected by image recognition through the camera. If the rain collector needs to be cleaned again, S2-S6 are repeated. If the requirements are still not met after three cleanings, manual inspection is notified. If the rain collector has been cleaned, the water inlet is checked to add water to the rain collector in a metered manner, the rain gauge detection data is recorded, and the accuracy is checked. S8: After completing the maintenance of one rain gauge, the vehicle moves to the next rain gauge location and repeats S2-S7 to perform the maintenance of the next rain gauge. After all rain gauges have been maintained, the S9 vehicle returns to the parking area.

10. An automatic operation and maintenance device for a hydrological station rain gauge according to claim 9, characterized in that: In S2, a layer of cleaning gel is sprayed onto the surface of the cleaning head before it is removed from the cleaning cylinder.

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