Underground water level surveying device and surveying method

Abstract

The invention discloses an underground water level surveying device, and belongs to the field of water level surveying. Comprising a moving frame, the moving frame is provided with two sets of supporting frames, and auxiliary tables are installed on the side faces of the supporting frames; the straightening assemblies comprise supports installed on the movable frame, four sets of corner plates are installed on the supports, a fixing frame is connected between the four sets of corner plates, three sets of first straightening wheels are installed on the fixing frame through bearings, a sliding groove is formed in the fixing frame, and two sets of sliding blocks are installed in the sliding groove in a sliding mode. A second straightening wheel is mounted on the sliding block through a bearing; a screw rod is mounted on the side surface of the bracket; a traction part is mounted on the moving frame, the traction part comprises a bracket mounted on the moving frame, a mounting box is mounted on the bracket, and two groups of driving wheels are mounted in the mounting box through bearings. According to the underground water level surveying device, the gap between the straightening wheels is regulated and controlled through the screw to straighten the cable, the driving wheels are meshed and dragged, the transmission stability is improved, and the water level measurement precision is improved.

Description

Technical Field

[0001] This invention relates to the field of water level surveying technology, and in particular to a groundwater level surveying device. Background Technology

[0002] In fields such as water resource management, geological disaster prevention, and engineering construction, accurate groundwater level measurement is a crucial step in ensuring the scientific nature of decision-making. With the increasing demand for monitoring, existing groundwater level measurement devices widely employ pressure-based, ultrasonic, and float-based technologies. Pressure sensors calculate water level by measuring water pressure, ultrasonic sensors use reflected waves to calculate distance, while float-based devices rely on mechanical transmission to record water level changes.

[0003] In existing methods of groundwater level surveying using a rotating rod to release a cable and drive a pressure sensor at the bottom of a conical column, the cable, tightly wound around the rod, is prone to bending and twisting during release due to its inherent flexibility and the rod's rotation. As the cable length increases, this deformation accumulates, causing the pressure sensor's entry path into the water to deviate from vertical, resulting in a discrepancy between the measured cable release length and the actual water level depth. This is particularly problematic in deep water level surveys, where even small angular deviations, amplified by distance, can lead to measurement errors, affecting the accuracy of the results and failing to meet groundwater level survey requirements. Therefore, a groundwater level surveying device needs to be designed.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] This invention provides a groundwater level surveying device to solve the problem that when using a rotating rod to release a cable to drive a sensor to survey groundwater levels, the cable is prone to bending and twisting, and the cumulative deformation leads to large errors in deep water level measurement, making it difficult to meet the survey requirements.

[0006] The present invention adopts the following technical solution: a groundwater level surveying device. It mainly includes a moving component, an unwinding component, and a straightening component. The moving component includes a moving frame with two sets of support frames, and auxiliary platforms are installed on the sides of the support frames. The straightening component has two sets, each including a bracket mounted on the moving frame. Four sets of corner plates are installed on the sides of the bracket, and a fixed frame connects the four sets of corner plates. Three sets of first straightening wheels are mounted on the fixed frame via bearings. A sliding groove is provided on the fixed frame, and two sets of sliding blocks are slidably mounted in the sliding groove. Second straightening wheels are mounted on the sliding blocks via bearings. A screw is installed on the side of the bracket, threadedly connected to the bracket, with one end connected to the bearing of the sliding block. The cable is positioned between the first straightening wheels and the two sets of second straightening wheels. A traction unit is installed on the moving frame, including a bracket mounted on the moving frame. An installation box is mounted on the bracket, and two sets of drive wheels are mounted inside the installation box via bearings.

[0007] Furthermore, both sets of drive wheels have axles, one end of which passes through the mounting box. A gear is fixedly installed at one end of the axle, and the two sets of gears mesh. In the default state, one end of the cable passes between the two sets of drive wheels. A second motor is fixedly installed on the side of the mounting box. The output end of the second motor passes through the mounting box and is connected to the shaft end of one set of drive wheels through a coupling. The outer circumferential surfaces of both sets of drive wheels are provided with anti-slip rubber layers. The two sets of drive wheels achieve synchronous reverse rotation through gears.

[0008] Furthermore, the unwinding assembly is provided in two sets, and is respectively set on the two sets of support frames. The unwinding assembly includes an unwinding frame fixedly installed on the auxiliary platform. A spool is mounted on the bearing of the unwinding frame, and a cable is wound on the spool. A first motor is installed on the side of the unwinding frame, and the output end of the first motor is connected to one end of the spool.

[0009] Furthermore, a controller is fixedly installed on the mobile frame, and the controller is used to control the operation of the equipment.

[0010] Furthermore, four sets of pulleys are fixedly installed at the bottom of the mobile frame.

[0011] Furthermore, a limiting rod is fixedly installed on the mobile frame. The limiting rod has a through hole adapted to the cable. One end of the cable passes through the limiting rod and is connected in sequence to a float and a plumb block. The cable is marked with a scale. A pressure sensor is installed on the side of the float that is in contact with the water surface.

[0012] A groundwater level survey method, applicable to the aforementioned groundwater survey device, includes the following steps: S1. When conducting groundwater level surveys, the operator first moves the device to the target monitoring point using the pulleys at the bottom of the mobile frame; then, the controller starts the first motor and the second motor according to the preset program or external command; the first motor drives the reel to rotate, releasing the cable from the unwinding frame; S2. The straightening assembly adjusts the gap between the first and second straightening wheels by rotating the screw to squeeze and straighten the bent cable; the second motor of the traction unit drives the two sets of meshing drive wheels to rotate synchronously in opposite directions, relying on the friction of the anti-slip rubber layer to provide stable traction power for the cable. S3. After the cable is released into place, the plumb bob sinks to the bottom of the water or a fixed reference point to form a vertical reference. The float floats on the water surface and moves along the cable as the water level changes. The scale on the cable can initially reflect the water level value. At the same time, the pressure sensor at the contact point between the float and the water surface monitors the pressure on the float in real time and transmits the data to the controller for fusion calculation to finally obtain accurate water level data. S4. The unwinding assembly works in conjunction with the traction unit, which actively provides the cable release power to avoid bending caused by the cable's own flexibility and passive release. The straightening assembly uses an adjustable gap straightening wheel to shape the cable in real time, reducing the accumulation of deformation. The through-hole of the limiting rod forms a vertical guiding constraint on the cable, which, together with the anchoring effect of the plumb block, ensures that the sensor's water entry path remains vertical.

[0013] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects: A groundwater level surveying device enables two sets of straightening components to adjust the gap between the first and second straightening wheels via screws, which can dynamically straighten easily bent cables during release, effectively avoiding sensor water entry path deviation caused by cable twisting and improving measurement accuracy. The two sets of drive wheels of the traction unit achieve synchronous reverse rotation through gear meshing, and actively traction the cable with the help of the anti-slip rubber layer, solving the problem of insufficient thrust in traditional devices, ensuring uniform and stable cable transmission, and reducing deformation caused by uneven force. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0015] In the attached diagram: Figure 1 This is an overall schematic diagram of a groundwater level surveying device according to this application; Figure 2 for Figure 1 A sectional view; Figure 3 for Figure 2 Enlarged view of point A; Figure label: 1. Moving component; 11. Moving frame; 12. Pulley; 13. Controller; 14. Support frame; 15. Auxiliary platform; 2. Unwinding component; 21. Unwinding frame; 22. Reel; 23. First motor; 24. Limiting rod; 25. Float; 26. Plumb block; 3. Straightening component; 31. Bracket; 32. Angle plate; 33. Fixing frame; 34. First straightening wheel; 35. Sliding block; 36. Second straightening wheel; 37. Screw; 38. Bracket; 39. Mounting box; 310. Drive wheel; 311. Second motor. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0017] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Example 1 Reference Figures 1 to 3 As shown, this embodiment of the invention provides a groundwater level surveying device, including a moving component 1, an unwinding component 2, and a straightening component 3; The moving component 1 includes a moving frame 11, which has two sets of support frames 14, and an auxiliary platform 15 is fixedly installed on the side of the support frame 14. The unwinding component 2 has two sets, which are respectively installed on the two sets of support frames 14. The unwinding component 2 includes an unwinding frame 21 fixedly installed on the auxiliary platform 15. A winding shaft 22 is mounted on the unwinding frame 21 with a bearing. A cable is wound on the winding shaft 22. A first motor 23 is fixedly installed on the side of the unwinding frame 21. The output end of the first motor 23 is connected to one end of the winding shaft 22. When the cable needs to be released, the first motor 23 starts, and its output drives the reel 22 to rotate on the unwinding frame 21. Since the cable is wound on the reel 22, the rotation of the reel 22 causes the cable to gradually unwind and be released from the reel 22. When the cable needs to be retracted, the first motor 23 rotates in the opposite direction, driving the reel 22 to rotate in the opposite direction and rewind the cable onto the reel 22.

[0019] The straightening assembly 3 is provided in two sets. Each set of straightening assembly 3 includes a bracket 31 fixedly installed on the movable frame 11. Four sets of corner plates 32 are fixedly installed on the side of the bracket 31. A fixed frame 33 is connected between the four sets of corner plates 32. Three sets of first straightening wheels 34 are mounted on the fixed frame 33. At the same time, a sliding groove (not shown in the figure) is opened on the fixed frame 33. Two sets of sliding blocks 35 are slidably installed in the sliding groove. Second straightening wheels 36 are mounted on the sliding blocks 35. At the same time, a screw 37 is fixedly installed on the side of the bracket 31. The screw 37 is threadedly connected to the bracket 31, and one end of it is connected to the bearing of the sliding block 35. By default, the cable is positioned between the first straightening wheel 34 and the two sets of second straightening wheels 36. When the straightening force needs to be adjusted, the screw 37 is rotated. Since the screw 37 is threadedly connected to the bracket 31, the screw 37 moves axially when it rotates, thereby pushing or pulling the sliding block 35 to slide within the sliding groove. The sliding block 35 causes the second straightening wheels 36 to move closer to or further away from the first straightening wheel 34, changing the gap between the first straightening wheel 34 and the second straightening wheels 36. When the cable passes between these straightening wheels, the compression and guidance of the straightening wheels gradually straightens the originally bent and twisted cable. A traction unit is installed on the movable frame 11. The traction unit includes a bracket 38 fixedly installed on the movable frame 11, and a mounting box 39 is fixedly installed on the bracket 38. Two sets of drive wheels 310 are mounted in the mounting box 39 via bearings. The two sets of drive wheels 310 have axles, one end of which passes through the mounting box 39, and a gear is fixedly installed at one end of the axle. The two sets of gears mesh with each other. By default, one end of the cable passes between the two sets of drive wheels 310. A second motor 311 is fixedly installed on the side of the mounting box 39. The output end of the second motor 311 passes through the mounting box 39 and is connected to the shaft end of one set of drive wheels 310 via a coupling. The outer circumferential surfaces of both sets of drive wheels 310 are provided with anti-slip rubber layers, and the two drive wheels 310 achieve synchronous reverse rotation through gears. When the second motor 311 starts, its output end drives the connected drive wheel 310 to rotate via a coupling. The gear fixed to one end of the axle of the drive wheel 310 rotates accordingly. Since the gears of the two sets of drive wheels 310 mesh, the actively rotating gear drives the other set of gears to rotate in the opposite direction, thus causing the other drive wheel 310 to rotate synchronously in the opposite direction. The anti-slip rubber layer on the outer circumference of the two sets of drive wheels 310 is in close contact with the cable passing between them. During rotation, friction provides traction power to the cable, driving it to move smoothly. By controlling the forward and reverse rotation of the second motor 311, the cable can be released or retrieved. The gear set ensures that the two drive wheels 310 rotate at the same speed, preventing the cable from twisting or deforming due to uneven force, thus providing stable and reliable cable transmission power for groundwater level surveys.

[0020] A controller 13 is fixedly installed on the mobile frame 11. The controller 13 is used to control the operation of the above-mentioned equipment. During operation, it establishes a connection with each device (such as the first motor 23, the second motor 311, etc.) through electrical circuits and receives external commands or built-in program trigger signals. When it is necessary to release or retract the cable, the controller 13 sends a drive signal to the second motor 311 according to the set logic, adjusts the forward and reverse rotation and speed of the motor, and controls the drive wheel 310 to drive the cable to move. At the same time, according to the cable reeling and unloading requirements, the controller 13 also sends a command to the first motor 23 to coordinate the rotation speed of the reel 22 to avoid the cable being excessively slack or taut.

[0021] Specifically, four sets of pulleys 12 are fixedly installed at the bottom of the mobile frame 11. When it is necessary to move the mobile frame 11 to a designated position, the operator applies a pushing or pulling force to the mobile frame 11. After the external force is applied to the mobile frame 11, the pulleys 12 roll on the ground, driving the entire mobile frame 11 to move horizontally in the direction of the force. Due to the flexible rotation characteristics of the pulleys 12, the mobile frame 11 can easily turn, thus enabling convenient movement between different positions.

[0022] Specifically, a limiting rod 24 is fixedly installed on the movable frame 11, and a through hole adapted to the cable is opened on the limiting rod 24. One end of the cable passes through the limiting rod 24 and is connected in sequence to a float 25 and a plumb block 26. The cable is provided with a scale, and a pressure sensor (not shown in the figure) is provided on the side of the float 25 that is in contact with the water surface. The plumb bob 26 sinks to the bottom of the water or a fixed reference point by its own weight to provide a stable vertical reference and prevent the cable from shifting laterally due to external forces such as water flow and wind. The float 25 floats on the water surface. When the water level rises or falls, the float 25 will move synchronously along the cable and drive the plumb bob 26. The cable passes through the limiting rod 24, which plays a guiding and restraining role to ensure that the cable moves in the vertical direction and avoids it from getting tangled or swinging too much.

[0023] Meanwhile, a pressure sensor installed at the contact point between the float 25 and the water surface senses the water pressure acting on the float 25 in real time. The pressure sensor converts the sensed pressure signal into an electrical signal and transmits it to the controller 13. The controller 13 combines the displacement data read from the cable scale with the pressure data from the pressure sensor for calculation. For example, when encountering water surface fluctuations, the cable scale reading may be inaccurate due to the up-and-down movement of the float 25, but the pressure sensor measures a stable average pressure. By weighting the two types of data through an algorithm, measurement deviations caused by water surface fluctuations, wind, waves, etc., can be effectively eliminated, resulting in a more accurate water level value.

[0024] Example 2 A groundwater level survey method, applicable to the aforementioned groundwater survey device, includes the following steps: S1. When conducting groundwater level surveys, the operator first moves the device to the target monitoring point using the pulleys 12 at the bottom of the mobile frame 11. Then, the controller 13 starts the first motor 23 and the second motor 311 according to a preset program or external command. The first motor 23 drives the reel 22 to rotate, releasing the cable from the unwinding frame 21. S2. The straightening assembly 3 adjusts the gap between the first straightening wheel 34 and the second straightening wheel 36 by rotating the screw 37 to straighten the bent cable by squeezing; the second motor 311 of the traction unit drives the two sets of meshing drive wheels 310 to rotate synchronously in opposite directions, and provides stable traction power for the cable by relying on the friction of the anti-slip rubber layer. S3. Once the cable is released into position, the plumb bob 26 sinks to the bottom or a fixed reference point to form a vertical reference. The float 25 floats on the surface and moves along the cable as the water level changes. The markings on the cable provide a preliminary indication of the water level. Simultaneously, a pressure sensor at the point of contact between the float 25 and the water surface monitors the pressure on the float 25 in real time and transmits the data to the controller 13 for fusion calculation, ultimately obtaining accurate water level data. After the survey is completed, the cable can be retrieved by controlling the motor to reverse.

[0025] S4. The unwinding assembly 2 works in conjunction with the traction unit, which actively provides the cable release power to avoid bending caused by the cable's own flexibility and passive release; the straightening assembly 3 uses an adjustable gap straightening wheel to shape the cable in real time to reduce the accumulation of deformation. The perforation of the limiting rod 24 provides vertical guidance and constraint for the cable, which, together with the anchoring effect of the plumb block 26, ensures that the sensor's entry path into the water remains vertical. In addition, the innovative integration of cable scale measurement with pressure sensor data from the float 25 uses the stable pressure value of the pressure sensor to correct scale reading errors caused by water surface fluctuations and cable offset, effectively solving the problem of amplified angle offsets in deep-water level surveys.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A groundwater level surveying device, comprising a moving component (1), an unwinding component (2), and a straightening component (3), characterized in that: The moving component (1) includes a moving frame (11), which has two sets of support frames (14), and an auxiliary platform (15) is installed on the side of the support frame (14); The straightening assembly (3) is provided in two sets. Each set of straightening assembly (3) includes a bracket (31) installed on a movable frame (11). Four sets of corner plates (32) are installed on the side of the bracket (31). A fixed frame (33) is connected between the four sets of corner plates (32). Three sets of first straightening wheels (34) are installed on the bearing of the fixed frame (33). At the same time, a sliding groove is opened on the fixed frame (33). Two sets of sliding blocks (35) are slidably installed in the sliding groove. Second straightening wheels (36) are installed on the bearing of the sliding blocks (35). A screw (37) is installed on the side of the bracket (31). The screw (37) is threadedly connected to the bracket (31). One end of the screw is connected to the bearing of the sliding block (35). The cable is located between the first straightening wheel (34) and the two sets of second straightening wheels (36). The mobile frame (11) is equipped with a traction unit, which includes a bracket (38) mounted on the mobile frame (11). A mounting box (39) is mounted on the bracket (38), and two sets of drive wheels (310) are mounted in the mounting box (39) through bearings.

2. The groundwater level surveying device according to claim 1, characterized in that: The two sets of drive wheels (310) have axles, one end of which passes through the mounting box (39). A gear is fixedly installed at one end of the axle, and the two sets of gears mesh. In the default state, one end of the cable passes between the two sets of drive wheels (310). A second motor (311) is fixedly installed on the side of the mounting box (39). The output end of the second motor (311) passes through the mounting box (39) and is connected to the shaft end of one set of drive wheels (310) through a coupling. The outer circumferential surface of the two sets of drive wheels (310) is provided with an anti-slip rubber layer. The two sets of drive wheels (310) achieve synchronous reverse rotation through gears.

3. The groundwater level surveying device according to claim 2, characterized in that: The unwinding assembly (2) is provided in two sets and is respectively set on the two sets of support frames (14). The unwinding assembly (2) includes an unwinding frame (21) fixedly installed on the auxiliary platform (15). A reel (22) is mounted on the bearing of the unwinding frame (21). A cable is wound on the reel (22). A first motor (23) is installed on the side of the unwinding frame (21). The output end of the first motor (23) is connected to one end of the reel (22).

4. The groundwater level surveying device according to claim 3, characterized in that: A controller (13) is fixedly installed on the mobile frame (11), and the controller (13) is used to control the operation of the equipment.

5. The groundwater level surveying device according to claim (4), characterized in that: The bottom of the mobile frame (11) is fixedly equipped with four sets of pulleys (12).

6. The groundwater level surveying device according to claim 1, characterized in that: A limiting rod (24) is fixedly installed on the mobile frame (11). The limiting rod (24) has a through hole adapted to the cable. One end of the cable passes through the limiting rod (24) and is connected in sequence to a float (25) and a plumb block (26). The cable is provided with a scale. A pressure sensor is provided on the side of the float (25) that is in contact with the water surface.

7. A method for groundwater level surveying, characterized in that, A groundwater level surveying device applicable to any one of claims 1-6 comprises the following steps: S1. When conducting groundwater level survey, the operator first moves the device to the target monitoring point using the pulleys (12) at the bottom of the mobile frame (11); then, the controller (13) starts the first motor (23) and the second motor (311) according to the preset program or external command; the first motor (23) drives the reel (22) to rotate, releasing the cable from the unwinding frame (21); S2. The straightening assembly (3) adjusts the gap between the first straightening wheel (34) and the second straightening wheel (36) by rotating the screw (37) to straighten the bent cable by squeezing; the second motor (311) of the traction unit drives the two sets of meshing drive wheels (310) to rotate synchronously in opposite directions, and provides stable traction power for the cable by relying on the friction of the anti-slip rubber layer. S3. When the cable is released into place, the plumb block (26) sinks to the bottom of the water or a fixed reference point to form a vertical reference. The float (25) floats on the water surface and moves along the cable with the water level. The scale on the cable can initially reflect the water level value. At the same time, the pressure sensor at the contact point between the float (25) and the water surface monitors the pressure on the float (25) in real time and transmits the data to the controller (13) for fusion calculation, and finally obtains accurate water level data. S4. The unwinding assembly (2) works in conjunction with the traction unit, which actively provides the cable release power to avoid bending caused by the cable's own flexibility and passive release. The straightening assembly (3) uses the straightening wheel with adjustable gap to shape the cable in real time and reduce the accumulation of deformation. The through hole of the limiting rod (24) forms a vertical guiding constraint on the cable. Combined with the anchoring effect of the plumb block (26), it ensures that the sensor's water entry path remains vertical.

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