Underground water inflow measuring device and measuring method

Abstract

The invention discloses a groundwater inflow measuring device and method. The groundwater inflow measuring device comprises a winding roll, a detection assembly and a controller. The winding roll lowers the detection assembly to a detection position in the well casing; the detection assembly comprises a water temperature and water level probe, a flow velocity probe and a borehole diameter measuring instrument, the flow velocity probe comprises a probe shell, a camera is arranged in the probe shell, an objective lens is arranged below the camera, and a reflective mirror is arranged under the objective lens; a window is arranged on the outer wall of the probe shell, a light supplementing lamp is arranged in the window, light rays of the light supplementing lamp penetrate through the window to irradiate colloidal particles in water, the colloidal particles are irradiated by the light supplementing lamp and then are projected onto an objective lens through a reflective mirror, the objective lens images colloidal particle information onto a camera, and the camera transmits shot video information to a controller; the controller analyzes the video information to obtain the flow velocity and the flow direction of the colloid particles; and then the water inflow per unit volume is calculated through the section area of the flow velocity well pipe.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater inflow measurement, and in particular to a groundwater inflow measurement device and a measurement method. Background Art

[0002] Measuring the amount of water inflow between groundwater aquifers and evaluating the recharge between aquifers and the dynamic changes of groundwater based on the water inflow between aquifers are key links in hydrogeological surveys and engineering practice. This link plays an important role in evaluating the hydraulic characteristics of aquifers, ensuring the rational development of groundwater resources, controlling engineering safety and stability, evaluating environmental and ecological impacts, and pollution migration and remediation.

[0003] At present, the measurement of water inflow is generally done by directly measuring the water flow velocity using electromagnetic flowmeters or ultrasonic flowmeters. However, the water flow velocity between each aquifer in groundwater is different, and the water flow velocity between some aquifers is very low. The electromagnetic flowmeter or ultrasonic flowmeter has insufficient measurement accuracy for low flow velocity (small flow), and may even fail to measure it, which will affect the subsequent assessment of the mutual replenishment between each aquifer and the dynamic changes of groundwater. Summary of the invention

[0004] One of the main purposes of the present invention is to provide a groundwater inflow measurement device to solve the problem of insufficient measurement accuracy of electromagnetic flowmeters or ultrasonic flowmeters in the prior art for groundwater with low flow rates.

[0005] The second main purpose of the present invention is to provide a method for measuring groundwater inflow to solve the problem of insufficient measurement accuracy of electromagnetic flowmeters or ultrasonic flowmeters in the prior art for groundwater with low flow rates.

[0006] To solve the above technical problems, the present invention is implemented as follows: a groundwater inflow measurement device, including a winding reel, a detection component and a controller; The cable reel is wound with a cable, one end of which is connected to a power source, and the other end of which is connected to a detection component and supplies power to the detection component. The cable reel lowers the detection component to a detection position in the well pipe through the cable; The detection component includes a water temperature and water level probe, a flow rate probe and a caliper meter. The flow rate probe includes a vertically arranged probe housing, the probe housing is a hollow structure, a camera is arranged inside the probe housing, an objective lens is arranged below the camera, and the camera end of the camera faces the objective lens; a reflector is arranged directly below the objective lens; a window is arranged on the outer wall of the probe housing, the window is located at the position of the reflector, the reflector is inclined toward the window and cooperates with the objective lens; a fill light is arranged inside the window, the fill light is arranged toward the window; the light of the fill light shines on the colloidal particles in the water through the window, the colloidal particles in the water form scattered light after being illuminated by the fill light, and is projected onto the objective lens through the reflector, the objective lens images the colloidal particle information onto the camera, and the camera transmits the captured video information to the controller through a cable; The controller includes a control unit, a display unit and a storage unit. The control unit disassembles and analyzes the video information to obtain the flow rate and direction of the colloidal particles in the water; the storage unit is used to store the video information, analysis results and various data detected by the detection component; the display unit is used to display the video information captured by the camera in real time.

[0007] As a further technical solution, a sleeve is provided between the camera and the objective lens, the interior of the sleeve is a hollow structure, and both ends thereof are provided with openings, the camera is fixed on the top of the sleeve, and the objective lens is fixed on the bottom of the sleeve.

[0008] As a further technical solution, a sealing joint for connecting to a cable is provided on the top of the probe housing.

[0009] As a further technical solution, the viewing window is arranged around the circumference of the probe housing.

[0010] As a further technical solution, the fill light is located on one side of the reflector, and the fill light and the reflector form a fixed component. A first motor is provided below the fixed component to drive the fixed component to rotate around the central axis of the objective lens.

[0011] As a further technical solution, there are multiple fill lights, which are arranged in a circle along the circumference of the window, a light channel is provided in the center of the multiple fill lights, the reflector is facing the light channel, and a second motor is provided under the reflector to drive the reflector to rotate around the central axis of the objective lens.

[0012] A method for measuring groundwater inflow, using the above-mentioned groundwater inflow measuring device, comprises the following steps: S1. Use a power supply to power the detection component, and use a reel to lower the detection component into the well pipe. During the lowering process of the detection component, use a water temperature and water level probe to measure the water temperature and water level in real time, so as to accurately lower the detection component to the detection position; S2, measuring the inner diameter of the well pipe by a well diameter measuring instrument; S3. The velocity and direction of the groundwater at the detection position are measured by the velocity probe. First, the fill light illuminates the colloidal particles in the water through the window. The colloidal particles are illuminated by the fill light to form scattered light. The scattered light is projected onto the objective lens through the reflector. The objective lens focuses the particle information onto the camera. The camera transmits the captured video information to the controller through the cable. S4, the control unit in the controller receives the video information, and analyzes the moving direction of the colloid particles in the groundwater at the detection position through the video information, and calculates the moving speed of the colloid particles; and then converts the moving speed of the colloid particles to the vertical direction through vector calculation, that is, the flow velocity of the water flow at the detection position in the vertical direction is obtained; S5, the control unit calculates the cross-sectional area of ​​the well pipe by the inner diameter of the well pipe, and then calculates the water inflow per unit volume at the detection position by multiplying the flow velocity by the cross-sectional area of ​​the well pipe; S6, the detection position is the position between two adjacent aquifers; through the method of S1-S5, the detection components are sequentially lowered to the detection positions between each adjacent aquifer in the well pipe, the water temperature, water level, well diameter and flow rate of each detection position are measured, and the water inflow of each detection position is calculated by the control unit; S7, the video information captured by the camera, the data measured by the water temperature and water level probe, the data measured by the caliper meter, and the analysis and calculation results of the control unit are all stored in the storage unit.

[0013] The beneficial effects of the present invention are: The present invention uses particle recognition technology to detect the flow velocity and direction of groundwater in the vertical direction by using the movement of colloidal particles in water, and has high sensitivity at the micron level. Specifically, the present invention mainly uses a fill light to illuminate the dark environment of groundwater, so as to see the colloidal particles in the water. The colloidal particles in the water form scattered light after being illuminated by the fill light, and the scattered light is projected onto the objective lens through a reflector. The objective lens images the colloidal particle information onto the camera, and the camera transmits the captured video information to the control unit through a cable. The control unit can calculate the moving speed of the colloidal particles in the groundwater through the particle recognition technology, and convert the moving speed of the colloidal particles to the vertical direction through vector calculation, so as to obtain the flow velocity of the water flow in the vertical direction at the detection position. The well pipe cross-sectional area is calculated by the well pipe inner diameter, and then the water inflow per unit volume at the detection position is calculated by multiplying the flow velocity by the well pipe cross-sectional area.

[0014] The present invention sequentially lowers the detection components between adjacent aquifers in the well pipe in the above manner, thereby measuring and calculating the water inflow between adjacent aquifers, thereby conveniently and accurately evaluating the dynamic changes of groundwater, predicting the risk of water inflow, and rationally utilizing groundwater resources. In addition, the flow velocity measurement method of the present invention can detect micron-level particle movement and micron-level flow velocity, and its measurement accuracy is higher in the case of low flow velocity. At the same time, it can be used in a portable manner and can be used for real-time online monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the use state of the present invention; Figure 2 It is the internal detail diagram of the flow velocity probe in the present invention; Figure 3 It is the working principle diagram of the flow velocity probe in the present invention; Figure 4 This is a partial detail diagram of the flow velocity probe in Example 3.

[0017] Description of Reference Numerals 1. Power supply; 2. Display unit; 3. Cable reel; 4. Control unit; 5. Storage unit; 6. Well pipe; 7. Water temperature and water level probe; 8. Flow rate probe; 801. Cable; 802. Sealing joint; 803. Probe housing; 804. Camera; 805. Sleeve; 806. Objective lens; 807. Fill light; 808. Reflector; 809. Window; 810. Second motor; 811. First motor; 812. Light channel; 9. Well diameter measuring instrument; 10. Aquifer position; 11. Colloidal particles. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below. Embodiment 1

[0019] like Figure 1-Figure 3 As shown, the present invention proposes a groundwater inflow measurement device, including a winding drum 3, a detection component and a controller; A cable 801 is wound around the reel 3, one end of the cable 801 is connected to the external power source 1, and the other end is connected to the detection component and supplies power to the detection component. The reel 3 lowers the detection component to the detection position in the well pipe 6 through the cable 801. Figure 1 As shown. The detection position is the middle of two adjacent aquifers. Figure 1 The well pipe 6 and the position of each aquifer 10 are shown as examples. In actual measurement, the water level of each aquifer is known (i.e., measured in advance) and recorded in the local geological exploration data. In principle, the underground water level remains unchanged.

[0020] The detection component in the present application includes a water temperature and water level probe 7, a flow rate probe 8 and a well diameter measuring instrument 9, wherein the water temperature and water level probe 7 is used to measure the water temperature and water level at the detection position, and the well diameter measuring instrument 9 is used to measure the inner diameter of the well pipe 6. In actual measurement, the water level of each aquifer can be known from the geological exploration data, and the water level at the middle position (i.e., the detection position) of two adjacent aquifers can be inferred. Therefore, when the detection component in the present invention is lowered into the well pipe 6, the water temperature and water level probe 7 can be used to monitor the depth of the detection component in real time, and the detection component can be accurately lowered to the detection position, and then the flow rate probe 8 can be used to measure the flow rate at the position.

[0021] like Figure 2 As shown, the flow rate probe 8 includes a vertically arranged probe housing 803, which is a hollow structure inside and sealed outside; a sealing joint 802 for connecting to a cable 801 is provided on the top of the probe housing 803, and the cable 801 can power various components inside the probe housing 803. A camera 804 is provided inside the probe housing 803, and an objective lens 806 is provided below the camera 804, and the camera end of the camera 804 is facing the objective lens 806; Figure 2 As shown, a sleeve 805 is provided between the camera 804 and the objective lens 806. The sleeve 805 is vertically arranged, and the interior of the sleeve 805 is a hollow structure with openings at both ends. The camera 804 is fixed to the top of the sleeve 805, and the objective lens 806 is fixed to the bottom of the sleeve 805, that is, the sleeve 805 is used to install and fix the camera 804 and the objective lens 806, and to connect the two. Figure 2 As shown, a reflector 808 is arranged just below the objective lens 806; and a viewing window 809 is arranged on the outer wall of the probe housing 803, and the viewing window 809 is located at the position of the reflector 808. The reflector 808 is arranged to be inclined toward the viewing window 809 and cooperates with the objective lens 806, that is, the situation outside the viewing window 809 can be projected onto the objective lens 806 through the reflector 808. A fill light 807 is arranged inside the viewing window 809, and the fill light 807 is arranged toward the viewing window 809; the fill light 807 can illuminate the dark environment in the groundwater through the viewing window 809, so that the colloidal particles 11 in the water can be seen, and the colloidal particles 11 in the water form scattered light after being illuminated by the fill light 807, as shown in FIG. Figure 3 As shown, the scattered light is projected onto the objective lens 806 through the reflector 808, and the objective lens 806 images the information of the colloidal particles 11 onto the camera 804, and the camera 804 transmits the captured video information to the controller through the cable 801, wherein the camera 804 in the present application is a high-speed camera in the prior art. The controller includes a control unit 4, a display unit 2 and a storage unit 5, and the control unit 4 disassembles and analyzes the video information to obtain the flow rate and flow direction of the colloidal particles 11 in the water, wherein the control unit 4 can calculate the moving speed of the colloidal particles 11 in the groundwater through the particle recognition technology, and convert the moving speed of the colloidal particles 11 to the vertical direction through vector calculation, thereby obtaining the flow rate of the water flow in the vertical direction at the detection position. The storage unit 5 is used to store video information, analyze the calculation results and various data detected by the detection component; the display unit 2 is used to display the video information captured by the camera 804 in real time. Embodiment 2

[0022] like Figure 3 As shown, the window 809 in the second embodiment is arranged around the circumference of the probe housing 803, that is, it is arranged around the probe housing 803, and the fill light 807 in the second embodiment is located on one side of the reflector 808 and is arranged close to the window 809. The fill light 807 does not affect the reflector 808 from projecting light onto the objective lens 806, and the fill light 807 and the reflector 808 are a fixed component, and a first motor 811 is provided below the fixed component to drive the fixed component to rotate around the central axis of the objective lens 806. Figure 3 As shown, in the second embodiment, two fill-in lights 807 are provided, which are respectively located at the upper and lower positions of the reflector 808, and the two fill-in lights 807 are respectively located at the upper side and the lower side of one side of the reflector 808, but not located directly above the reflector 808, so as not to affect the light projection between the reflector 808 and the objective lens 806. In addition, the first motor 811 can drive the reflector 808 and the fill-in lights 807 to rotate together, so as to illuminate the colloidal particles 11 at different positions outside and observe their movement.

[0023] The other structures in the second embodiment are the same as those in the first embodiment. Embodiment 3

[0024] like Figure 4 As shown, the window 809 in the third embodiment is arranged around the circumference of the probe housing 803, which is the same as the second embodiment. A plurality of fill-in lights 807 are arranged, and the plurality of fill-in lights 807 are arranged around the circumference of the window 809, so that the fill-in lights 807 can illuminate 360 ​​degrees. Figure 4As shown, a light channel 812 is provided at the center of the plurality of fill-in lights 807, and a reflector 808 is located below the fill-in lights 807 and directly facing the light channel 812. The light channel 812 is large enough so that the reflected light of the reflector 808 can pass through the light channel 812 to reach the objective lens 806. Therefore, the fill-in lights 807 do not affect the reflector 808 from projecting light onto the objective lens 806. A second motor 810 is provided below the reflector 808 to drive the reflector 808 to rotate around the central axis of the objective lens 806. In the third embodiment, the reflector 808 and the fill-in lights 807 are not an integrated structure. The fill-in lights 807 are arranged in a circle to illuminate the colloidal particles 11 at various positions, and the reflector 808 can rotate to project light of the colloidal particles 11 at different positions. In addition, the fill light 807 in the third embodiment can be located above or below the reflector 808, or a circle of fill lights 807 can be arranged above and below the reflector 808. Figure 4 shown.

[0025] The other structures in the third embodiment are the same as those in the first embodiment. Embodiment 4

[0026] A method for measuring groundwater inflow, using the above-mentioned device, comprises the following steps: S1. Use power supply 1 to power the detection component, and use winding drum 3 to lower the detection component into well pipe 6. During the lowering process of the detection component, use water temperature and water level probe 7 to measure water temperature and water level in real time, so as to accurately lower the detection component to the detection position; S2, measuring the inner diameter of the well pipe 6 by using the well diameter measuring instrument 9; S3, the velocity and direction of the groundwater in the vertical direction at the detection position are measured by the velocity probe 8. First, the fill light 807 illuminates the colloidal particles 11 in the water through the window 809. The colloidal particles 11 are illuminated by the fill light 807 to form scattered light. The scattered light is projected onto the objective lens 806 through the reflector 808. The objective lens 806 focuses the particle information onto the camera 804. The camera 804 transmits the captured video information to the controller through the cable 801. S4, the control unit 4 in the controller receives the video information, and analyzes the moving direction of the colloidal particles 11 in the groundwater at the detection position through the video information, and calculates the moving speed of the colloidal particles 11, and then converts the speed of the colloidal particles 11 to the vertical direction through vector calculation, that is, the flow velocity of the water flow at the detection position in the vertical direction is obtained; S5, the control unit 4 calculates the cross-sectional area of ​​the well pipe 6 by the inner diameter of the well pipe 6, and then calculates the water inflow per unit volume at the detection position by multiplying the flow velocity by the cross-sectional area of ​​the well pipe 6; S6, the detection position is the position between two adjacent aquifers; through the method of S1-S5, the detection components are sequentially lowered to the detection positions between each adjacent aquifer in the well pipe 6, the water temperature, water level, well diameter and flow rate of each detection position are measured, and the water inflow of each detection position is calculated by the control unit 4; S7, the video information captured by the camera 804, the data measured by the water temperature and water level probe 7, the data measured by the caliper 9, and the analysis and calculation results of the control unit 4 are all stored in the storage unit 5; the display unit 2 can display the video captured by the camera 804 in real time.

[0027] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A groundwater inflow measurement device, characterized in that: Includes a cable reel, a detection assembly, and a controller; The cable reel is wound with a cable, one end of which is connected to a power source, and the other end of which is connected to a detection component and supplies power to the detection component. The cable reel lowers the detection component to a detection position in the well pipe through the cable; The detection component includes a water temperature and water level probe, a flow rate probe and a caliper meter. The flow rate probe includes a vertically arranged probe housing, the probe housing is a hollow structure, a camera is arranged inside the probe housing, an objective lens is arranged below the camera, and the camera end of the camera faces the objective lens; a reflector is arranged directly below the objective lens; a window is arranged on the outer wall of the probe housing, the window is located at the position of the reflector, the reflector is inclined toward the window and cooperates with the objective lens; a fill light is arranged inside the window, the fill light is arranged toward the window; the light of the fill light shines on the colloidal particles in the water through the window, the colloidal particles in the water form scattered light after being illuminated by the fill light, and is projected onto the objective lens through the reflector, the objective lens images the colloidal particle information onto the camera, and the camera transmits the captured video information to the controller through a cable; The controller includes a control unit, a display unit and a storage unit. The control unit disassembles and analyzes the video information to obtain the flow rate and direction of the colloidal particles in the water; the storage unit is used to store the video information, analysis results and various data detected by the detection component; the display unit is used to display the video information captured by the camera in real time.

2. A groundwater inflow measurement device according to claim 1, characterized in that: A sleeve is arranged between the camera and the objective lens. The interior of the sleeve is a hollow structure, and both ends of the sleeve are provided with openings. The camera is fixed on the top of the sleeve, and the objective lens is fixed on the bottom of the sleeve.

3. A groundwater inflow measurement device according to claim 1, characterized in that: A sealing joint for connecting with a cable is provided on the top of the probe housing.

4. A groundwater inflow measurement device according to claim 1, characterized in that: The viewing window is arranged around the circumference of the probe housing.

5. A groundwater inflow measurement device according to claim 4, characterized in that: The fill light is located on one side of the reflector, and the fill light and the reflector form a fixed component. A first motor is provided below the fixed component to drive the fixed component to rotate around the central axis of the objective lens.

6. A groundwater inflow measurement device according to claim 4, characterized in that: There are multiple fill-in lights, which are arranged in a circle along the circumference of the window. A light channel is provided in the center of the multiple fill-in lights. The reflector faces the light channel. A second motor is provided under the reflector to drive the reflector to rotate around the central axis of the objective lens.

7. A method for measuring groundwater inflow, using a groundwater inflow measuring device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Use a power supply to power the detection component, and use a reel to lower the detection component into the well pipe. During the lowering process of the detection component, use a water temperature and water level probe to measure the water temperature and water level in real time, so as to accurately lower the detection component to the detection position; S2, measuring the inner diameter of the well pipe by a caliper measuring instrument; S3. The velocity and direction of the groundwater at the detection position are measured by the velocity probe. First, the fill light illuminates the colloidal particles in the water through the window. The colloidal particles are illuminated by the fill light to form scattered light. The scattered light is projected onto the objective lens through the reflector. The objective lens focuses the particle information onto the camera. The camera transmits the captured video information to the controller through the cable. S4, the control unit in the controller receives the video information, and analyzes the moving direction of the colloid particles in the groundwater at the detection position through the video information, and calculates the moving speed of the colloid particles; and then converts the moving speed of the colloid particles to the vertical direction through vector calculation, that is, the flow velocity of the water flow at the detection position in the vertical direction is obtained; S5, the control unit calculates the cross-sectional area of ​​the well pipe by the inner diameter of the well pipe, and then calculates the water inflow per unit volume at the detection position by multiplying the flow velocity by the cross-sectional area of ​​the well pipe; S6, the detection position is the position between two adjacent aquifers; through the method of S1-S5, the detection components are sequentially lowered to the detection positions between each adjacent aquifer in the well pipe, the water temperature, water level, well diameter and flow rate of each detection position are measured, and the water inflow of each detection position is calculated by the control unit; S7, the video information captured by the camera, the data measured by the water temperature and water level probe, the data measured by the caliper measuring instrument, and the analysis and calculation results of the control unit are all stored in the storage unit.

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