Monitoring device for underground water level

Abstract

The utility model relates to the technical field of water level monitoring, and discloses a monitoring device for underground water level, which comprises a monitoring analysis module comprising a processor, and a first electronic dynamometer, a second electronic dynamometer and a third electronic dynamometer which are electrically connected with the processor and used for measuring gravity; the first counterweight body penetrates through the hollow sleeve through a first connecting rope and is connected with the first electronic dynamometer, and the bottom end of the hollow sleeve is fixedly connected with the first counterweight body; the second counterweight body is connected with the second electronic dynamometer through a second connecting rope, and the first connecting rope and the second connecting rope are the same in length; and the reference body is connected with the third electronic dynamometer through a third connecting rope. By adjusting the volume of the air bag, the first counterweight body is subjected to the same buoyancy as the initial state, and then calculation can be performed in a manner that the buoyancy of the first counterweight body is not changed in the subsequent calculation process, so that the accuracy of monitoring data is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water level monitoring, in particular to a monitoring device for underground water level. Background Technique

[0002] Groundwater is one of the important water resources, and its water level change has important impacts on agricultural irrigation, urban planning, ecological environment protection, etc. Traditional underground water level monitoring methods mostly adopt manual measurement or fixed monitors, and these methods have problems such as limited monitoring range, untimely data update, susceptibility to environmental interference, and poor accuracy.

[0003] The patent with the publication number of CN113267231B discloses an underground water level monitoring device and its monitoring method. In this patent, the density of the current groundwater is monitored in real time through the change of the reading of the second electronic dynamometer; the current underground water level elevation is calculated through the change of the reading of the first electronic dynamometer, the initial density of the groundwater, the density of the current groundwater, the initial elevation of the underground water level during installation, and the elevation of the top of the counterweight; the current underground water level elevation is calculated through the reading values of the first electronic dynamometer and the second electronic dynamometer, the initial elevation of the underground water level during installation, the elevation of the top of the counterweight, the volume of the reference body, and the cross-sectional area of the hollow tube. It can solve the problem of real-time and high-precision measurement of the underground water level under the condition of changing groundwater density.

[0004] However, this patent still has the following defects: when the groundwater is at different densities, the buoyancy of the counterweight changes. When calculating the underground water level elevation, this scheme calculates with the unchanged buoyancy of the counterweight, fails to fully consider the change of the buoyancy of the counterweight, and lacks a control group, resulting in a risk of distortion of the monitoring data. Content of the Utility Model

[0005] The utility model aims to provide a monitoring device for underground water level to overcome the above deficiencies.

[0006] In order to achieve the above object, the technical solution of the utility model is as follows:

[0007] A monitoring device for underground water level, comprising:

[0008] A monitoring and analysis module, which includes a processor, and a first electronic dynamometer, a second electronic dynamometer, and a third electronic dynamometer that are electrically connected to it and used for measuring gravity;

[0009] A first counterweight connected to the first electronic dynamometer through a first connecting rope passing through a hollow sleeve, and the bottom end of the hollow sleeve is fixedly connected to the first counterweight;

[0010] A second counterweight connected to the second electronic dynamometer through a second connecting rope, the first connecting rope and the second connecting rope having the same length; and

[0011] A reference body connected to the third electronic dynamometer through a third connecting rope;

[0012] The top surfaces of the first counterweight, the second counterweight, and the reference body are disposed below the perennial lowest groundwater level. The outer sidewalls of the first counterweight and the second counterweight are provided with airbags capable of controlling volume changes, and the top height of the hollow casing is higher than the perennial highest water level line.

[0013] Further, the first counterweight and the second counterweight have the same specifications and are located at the same horizontal height.

[0014] Further, the first counterweight and the second counterweight are internally provided with high-pressure gas cylinders. High-pressure gas is provided in the high-pressure gas cylinders. The high-pressure gas cylinders are communicated with the airbags through air inlet pipes. First solenoid valves are provided on the air inlet pipes. The airbags are connected with exhaust pipes. The exhaust pipes are communicated with the outside. Second solenoid valves are provided on the exhaust pipes. Both the first solenoid valve and the second solenoid valve are electrically connected to the processor.

[0015] Further, the monitoring and analysis module further includes a communication module electrically connected to the processor. The communication module includes a wireless data transmission module and / or a wired data transmission module.

[0016] Further, it further includes a support platform installed on the ground surface. The processor, the first electronic dynamometer, the second electronic dynamometer, the third electronic dynamometer, and the communication module are all installed on the support platform.

[0017] Further, the densities of the first counterweight, the second counterweight, and the reference body are all greater than the density of groundwater.

[0018] Further, the bottom end of the hollow casing is provided with an external thread section, and the top end of the hollow casing is provided with a first internal thread section. The first internal thread section is adapted to the external thread section, and the adjacent hollow casings are detachably connected by threads.

[0019] Further, the top end of the first counterweight is provided with a second internal thread section. The second internal thread section is adapted to the external thread section, and the bottom end of the lowermost hollow casing is threadedly connected to the top end of the first counterweight.

[0020] Further, the first connecting rope, the second connecting rope, and the third connecting rope are made of steel wire ropes.

[0021] The present utility model has at least the following advantages compared with the prior art:

[0022] By providing a second electronic dynamometer and a second counterweight, the utility model can, when the density of groundwater changes, synchronously adjust the airbag volumes of the first counterweight and the second counterweight, so that the second counterweight receives the same buoyancy as in the initial state, and synchronously enables the first counterweight to also receive the same buoyancy as in the initial state. Furthermore, in subsequent calculations, the method of keeping the buoyancy of the first counterweight unchanged can be adopted for calculation, thereby improving the accuracy of monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic diagram of the overall structure of the monitoring device for groundwater level of the present utility model;

[0025] Figure 2 is a schematic diagram of the structure of the hollow casing of the present utility model.

[0026] Reference numerals: 1, processor; 2, first electronic dynamometer; 3, second electronic dynamometer; 4, third electronic dynamometer; 5, first connecting rope; 6, first counterweight; 7, hollow casing; 8, second connecting rope; 9, second counterweight; 10, airbag; 11, third connecting rope; 12, reference body; 13, communication module; 14, support platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Refer to Figure 1, the present utility model provides a monitoring device for the groundwater level, including a monitoring and analysis module, a first counterweight 6, a second counterweight 9, and a reference body 12. Among them: The monitoring and analysis module includes a processor 1, and a first electronic dynamometer 2, a second electronic dynamometer 3, and a third electronic dynamometer 4 that are electrically connected thereto and used for measuring gravity. The processor 1 is used to receive and process the gravity information measured by the first electronic dynamometer 2, the second electronic dynamometer 3, and the third electronic dynamometer 4; The first counterweight 6 is connected to the first electronic dynamometer 2 through a first connecting rope 5, and the first connecting rope 5 passes through a hollow casing 7. The bottom end of the hollow casing 7 is fixedly connected to the first counterweight 6. The top surface of the first counterweight 6 is arranged below the perennial lowest groundwater level line, and the top height of the hollow casing 7 is higher than the perennial highest water level line; The second counterweight 9 is connected to the second electronic dynamometer 3 through a second connecting rope 8. The top surface of the second counterweight 9 is arranged below the perennial lowest groundwater level line. The first connecting rope 5 and the second connecting rope 8 have the same specification model and length. The second counterweight 9 and the first counterweight 6 are arranged side by side. An airbag 10 capable of controlling volume change is arranged on the outer side walls of the first counterweight 6 and the second counterweight 9. The airbag 10 is made of rubber material and can adjust its own volume as the internal gas pressure changes, thereby being able to change the volumes of the first counterweight 6 and the second counterweight 9, and further changing their buoyancy in water; The reference body 12 is connected to the third electronic dynamometer 4 through a third connecting rope 11. The top surface of the reference body 12 is arranged below the perennial lowest groundwater level line.

[0030] In a preferred embodiment of the present utility model, the densities of the first counterweight 6, the second counterweight 9, and the reference body 12 are all greater than the density of the groundwater. The first counterweight 6 and the second counterweight 9 have the same specifications and are located at the same horizontal height. The first connecting rope 5, the second connecting rope 8, and the third connecting rope 11 are made of steel wire ropes.

[0031] Preferably, the first counterweight 6 and the second counterweight 9 are internally provided with high-pressure gas cylinders. High-pressure gas is arranged in the high-pressure gas cylinders. The high-pressure gas cylinders are communicated with the airbag 10 through an air inlet pipe. A first electromagnetic valve is arranged on the air inlet pipe. The airbag 10 is connected with an exhaust pipe, and the exhaust pipe is communicated with the outside. A second electromagnetic valve is arranged on the exhaust pipe. Both the first electromagnetic valve and the second electromagnetic valve are electrically connected to the processor 1. The processor 1 is used to control the opening and closing of the first electromagnetic valve and the second electromagnetic valve. When the first electromagnetic valve is opened and the second electromagnetic valve is closed, at this time, the high-pressure gas can be filled into the airbag 10, making the volume of the airbag 10 larger; When the first electromagnetic valve is closed and the second electromagnetic valve is opened, at this time, the gas in the airbag 10 is discharged through the exhaust pipe under the action of the water pressure, and at this time, the volume of the airbag 10 becomes smaller. Specifically, when the pressure in the high-pressure gas cylinder is relatively large, a pressure reducing valve can be installed on the air inlet pipe to reduce the gas flow rate in the air inlet pipe.

[0032] Preferably, the monitoring and analysis module further includes a communication module 13 electrically connected to the processor 1. The communication module 13 includes a wireless data transmission module and / or a wired data transmission module.

[0033] Preferably, it further includes a support platform 14 installed on the ground surface. The processor 1, the first electronic dynamometer 2, the second electronic dynamometer 3, the third electronic dynamometer 4, and the communication module 13 are all installed on the support platform 14.

[0034] Refer to Figure 2 , the hollow casing 7 of the present utility model adopts a multi-section type, and the specific length is spliced according to actual needs. The specific structure is that the bottom end of the hollow casing 7 is provided with an external thread section, the top end of the hollow casing 7 is provided with a first internal thread section, the first internal thread section is adapted to the external thread section, and the adjacent hollow casings 7 are detachably connected by threads.

[0035] Optionally, the top end of the first counterweight 6 is provided with a second internal thread section, the second internal thread section is adapted to the external thread section, and the bottom end of the lowermost hollow casing 7 is threadedly connected to the top end of the first counterweight 6.

[0036] The monitoring method using the underground water level monitoring device of the present utility model is as follows:

[0037] First step, install the underground water level monitoring device. The top surface of the first counterweight 6, the top surface of the first counterweight 6, and the top surface of the reference body 12 are set below the perennial lowest water level line of the underground water, and the top surface of the first counterweight 6, the top surface of the first counterweight 6, and the reference body 12 are always in a suspended state. The top height of the hollow casing 7 is higher than the perennial highest water level line. Record the current initial elevation H0 of the underground water level, and record the initial elevations h0 of the current first counterweight 6 and the second counterweight 9.

[0038] Second step, record the current initial readings of the first electronic dynamometer 2, the second electronic dynamometer 3, and the third electronic dynamometer 4. According to the current initial reading of the third electronic dynamometer 4, obtain the current initial density of the underground water.

[0039] Let the current initial density of the underground water be ρ 初 , the initial reading of the third electronic dynamometer 4 is F 初3 , the gravity received by the reference body 12 and the third connecting rope 11 is G 参 , the volume of the reference body 12 is V 参 , then:

[0040] F 初3 = G 参 - ρ 初 gV 参 Formula 1

[0041] Furthermore, the current initial density of the underground water is deduced as

[0042] ρ 初 = (G 参 - F 初3 ) / (gV 参 ) Formula 2

[0043] Step 3: When the water level height and the groundwater density change, according to the change in the reading of the third electronic dynamometer 4, obtain the changed groundwater density and monitor the density change of the groundwater in real time;

[0044] When the water level elevation changes to H, the current reading of the third electronic dynamometer 4 is F 瞬3 , assuming the changed groundwater density is ρ 瞬 , then:

[0045] F 瞬3 = G 参 - ρ 瞬 gV 参 Formula 3

[0046] Furthermore, the changed groundwater density is deduced as

[0047] ρ 瞬 = (G 参 - F 瞬3 ) / (gV 参 ) Formula 4

[0048] Step 4: Synchronously control the first solenoid valve and the second solenoid valve for the readings on the first counterweight 6 and the second counterweight 9, so that the reading of the second electronic dynamometer 3 returns to the initial state value, and record the reading of the first electronic dynamometer 2;

[0049] Assume the initial reading of the first electronic dynamometer 2 is F 初1 , the current reading of the first electronic dynamometer 2 is F 顺1 , the gravity of the first connecting rope 5, the hollow sleeve 7 and the first counterweight 6 is G1, and the buoyancy of the first counterweight 6 is F1, then:

[0050] F 初1 = G1 - F1 - ρ 初 gS(H0 - h0) Formula 5

[0051] F 顺1 = G1 - F1 - ρ 瞬 gS(H0 - h0) Formula 6

[0052] Through Formula 5 and Formula 6, obtain the current groundwater level elevation H:

[0053] H = h0 + (ρ 初 / ρ 瞬 ) * (H0 - h0) + (F 初1 - F顺1 ) / (ρ 瞬 gS) m³

[0054] Equation 7

[0055] Substitute Equation 2 and Equation 4 into Equation 7, we get:

[0056] H = h0 + [(G 参 - F 初3 ) * (H0 - h0)] / (G 参 - F 瞬3 ) + [(F 初1 - F 顺1 ) * V 参 / [(G

[0057] 参 - F 瞬3 ) * S] Equation 8

[0058] Step 5: Transmit the changed groundwater level elevation obtained in the fourth step to the background server through the communication module 13.

[0059] Step 6: Repeat Step 3 to Step 5 to monitor the water surface elevation of the groundwater in real time.

[0060] It should be noted that since the drainage volumes of the first connecting rope 5 and the third connecting rope 11 are relatively small, the buoyancy of the water body they receive can be ignored; and the gravity change caused by gas loss is relatively small and is not considered in the above calculation.

[0061] By setting the second electronic dynamometer 2 and the second counterweight 9, the present utility model can, when the density of groundwater changes, synchronously adjust the volumes of the airbags 10 of the first counterweight 6 and the second counterweight 9, so that the second counterweight 9 receives the same buoyancy as in the initial state, and synchronously realizes that the first counterweight 6 also receives the same buoyancy as in the initial state. Furthermore, in the subsequent calculation process, the method of keeping the buoyancy of the first counterweight 6 unchanged can be adopted for calculation, thereby improving the accuracy of the monitoring data.

[0062] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0063] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A monitoring device for groundwater level, characterized in that, Comprising: A monitoring and analysis module, which includes a processor (1), and a first electronic dynamometer (2), a second electronic dynamometer (3), and a third electronic dynamometer (4) that are electrically connected thereto and used for measuring gravity; A first counterweight (6) connected to the first electronic dynamometer (2) through a first connecting rope (5) passing through a hollow sleeve (7), and the bottom end of the hollow sleeve (7) is fixedly connected to the first counterweight (6); A second counterweight (9) connected to the second electronic dynamometer (3) through a second connecting rope (8), and the first connecting rope (5) and the second connecting rope (8) have the same length; And A reference body (12) connected to the third electronic dynamometer (4) through a third connecting rope (11); The first counterweight (6) and the second counterweight (9) have the same specifications and are located at the same horizontal height. The top surfaces of the first counterweight (6), the second counterweight (9), and the reference body (12) are arranged below the perennial lowest groundwater level line. The outer sidewalls of the first counterweight (6) and the second counterweight (9) are provided with airbags (10) capable of controlling volume change, and the top height of the hollow sleeve (7) is higher than the perennial highest water level line.

2. The monitoring device for the groundwater level according to claim 1, wherein The first counterweight (6) and the second counterweight (9) are internally provided with high-pressure gas tanks. High-pressure gas is provided in the high-pressure gas tanks. The high-pressure gas tanks are communicated with the airbags (10) through air inlet pipes. A first solenoid valve is provided on the air inlet pipes. The airbags (10) are connected with exhaust pipes, and the exhaust pipes are communicated with the outside. A second solenoid valve is provided on the exhaust pipes. The first solenoid valve and the second solenoid valve are both electrically connected to the processor (1).

3. The monitoring device for the groundwater level according to claim 2, characterized in that, The monitoring and analysis module further includes a communication module (13) electrically connected to the processor (1), and the communication module (13) includes a wireless data transmission module and / or a wired data transmission module.

4. The monitoring device for the groundwater level according to claim 3, characterized in that, It further includes a support platform (14) installed on the ground surface, and the processor (1), the first electronic dynamometer (2), the second electronic dynamometer (3), the third electronic dynamometer (4), and the communication module (13) are all installed on the support platform (14).

5. The monitoring device for the groundwater level according to claim 1, characterized in that, The densities of the first counterweight (6), the second counterweight (9), and the reference body (12) are all greater than the density of groundwater.

6. The monitoring device for the groundwater level according to claim 1, characterized in that, The bottom end of the hollow sleeve (7) is provided with an external thread section, and the top end of the hollow sleeve (7) is provided with a first internal thread section, and the first internal thread section is adapted to the external thread section, and the adjacent hollow sleeves (7) are detachably connected by threads.

7. The monitoring device for the groundwater level according to claim 6, wherein, The top end of the first counterweight (6) is provided with a second internal thread section, and the second internal thread section is adapted to the external thread section, and the bottom end of the lowermost hollow sleeve (7) is threadedly connected to the top end of the first counterweight (6).

8. The monitoring device for the groundwater level according to claim 1, characterized in that, The materials of the first connecting rope (5), the second connecting rope (8), and the third connecting rope (11) are steel wires.

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