An underground water inflow measurement device and measurement method

Abstract

The present invention discloses a device and a measuring method for measuring the groundwater inflow, comprising a wire reel, a detection component and a controller; the wire reel lowers the detection component to the detection position in the well pipe; the detection component includes a water temperature and water level probe, a flow velocity probe and a well diameter measuring instrument, the flow velocity probe includes a probe housing, a camera is arranged inside the probe housing, an objective lens is arranged below the camera, and a reflector is arranged directly below the objective lens; a window is arranged on the outer wall of the probe housing, a supplementary light is arranged inside the window, the light of the supplementary light irradiates the colloidal particles in the water through the window, after being irradiated by the supplementary light, the colloidal particles are 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; the controller analyzes the video information to obtain the flow velocity and flow direction of the colloidal particles; and then calculates the water inflow per unit volume by multiplying the flow velocity by the cross-sectional area of the well pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater discharge measurement, and particularly to a groundwater discharge measurement device and a measurement method. Background Art

[0002] Measuring the water discharge between groundwater aquifers and evaluating the recharge situation between aquifers and the dynamic changes of groundwater based on the water discharge between aquifers are key links in hydrogeological surveys and engineering practices; 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] Currently, the measurement of water discharge generally uses an electromagnetic flowmeter or an ultrasonic flowmeter to directly measure the water flow velocity. However, the water flow velocities between different groundwater aquifers are 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 velocities (small flow rates), and may even fail to measure, thus affecting the subsequent evaluation of the recharge situation between aquifers and the dynamic changes of groundwater. Summary of the Invention

[0004] One of the main objects of the present invention is to provide a groundwater discharge measurement device to solve the problem of insufficient measurement accuracy of electromagnetic flowmeters or ultrasonic flowmeters in the case of low groundwater flow velocities in the prior art.

[0005] Another main object of the present invention is to provide a groundwater discharge measurement method to solve the problem of insufficient measurement accuracy of electromagnetic flowmeters or ultrasonic flowmeters in the case of low groundwater flow velocities in the prior art.

[0006] To solve the above technical problems, the present invention is implemented as follows: A groundwater discharge measurement device includes a wire reel, a detection component, and a controller;

[0007] A cable is wound around the wire reel. One end of the cable is connected to a power supply, and the other end is connected to the detection component to supply power to the detection component. The wire reel lowers the detection component to the detection position in the well pipe through the cable;

[0008] The detection component includes a water temperature and level probe, a flow velocity probe, and a well diameter measuring instrument. The flow velocity probe includes a vertically arranged probe housing, which is a hollow structure. A camera is provided inside the probe housing. An objective lens is provided below the camera, and the imaging end of the camera faces the objective lens. A reflector is provided directly below the objective lens. A window is provided on the outer wall of the probe housing at the position of the reflector. The reflector is inclined towards the window and cooperates with the objective lens. A supplementary light is provided inside the window and faces the window. The light of the supplementary light passes through the window and irradiates the colloidal particles in the water. After being irradiated by the supplementary light, the colloidal particles in the water form scattered light, which 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.

[0009] 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 velocity 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.

[0010] As a further technical solution, a sleeve is provided between the camera and the objective lens. The inside of the sleeve is a hollow structure, and both ends of the sleeve are provided with openings. The camera is fixed at the top of the sleeve, and the objective lens is fixed at the bottom of the sleeve.

[0011] As a further technical solution, a sealing joint for connecting with the cable is provided at the top of the probe housing.

[0012] As a further technical solution, the window is arranged circumferentially around the probe housing.

[0013] As a further technical solution, the supplementary light is located on one side of the reflector, and the supplementary light and the reflector form a fixed component. A first motor for driving the fixed component to rotate around the central axis of the objective lens is provided below the fixed component.

[0014] As a further technical solution, there are multiple supplementary lights, and the multiple supplementary lights are arranged in a circle along the circumferential direction of the window. A light channel is provided at the center of the multiple supplementary lights. The reflector faces the light channel directly, and a second motor for driving the reflector to rotate around the central axis of the objective lens is provided below the reflector.

[0015] A method for measuring the groundwater inflow uses the above-mentioned groundwater inflow measuring device and includes the following steps:

[0016] S1. Power the detection component using a power supply, and lower the detection component into the well pipe using a cable reel. 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;

[0017] S2. Measure the inner diameter of the well pipe using a well diameter measuring instrument;

[0018] S3. Measure the flow velocity and flow direction of the groundwater at the detection position in the vertical direction using a flow velocity probe. First, the supplementary light lamp irradiates the colloidal particles in the water through the window. After being irradiated by the supplementary light lamp, the colloidal particles form scattered light. The scattered light is projected onto the objective lens through a reflector. The objective lens focuses the particle information onto the camera, and the camera transmits the captured video information to the controller through a cable;

[0019] S4. The control unit in the controller receives the video information, analyzes the moving direction of the colloidal particles in the groundwater at the detection position through the video information, and calculates the moving speed of the colloidal particles; then, through vector calculation, convert the moving speed of the colloidal particles to the vertical direction, that is, obtain the flow velocity of the water flow at the detection position in the vertical direction;

[0020] S5. The control unit calculates the cross-sectional area of the well pipe based on 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;

[0021] S6. The detection position is the position between two adjacent aquifers; in the manner of S1 - S5, lower the detection component to the detection positions between each adjacent aquifer in the well pipe in turn, measure the water temperature, water level, well diameter, and flow velocity at each detection position, and calculate the water inflow at each detection position through the control unit;

[0022] [[ID=1B]]S7. The video information captured by the camera, the data measured by the water temperature and water level probe, the data measured by the well diameter measuring instrument, and the analysis and calculation results of the control unit are all stored in the storage unit.

[0023] The beneficial effects of the present invention are:

[0024] The present invention uses particle recognition technology to detect the flow velocity and direction of groundwater in the vertical direction by utilizing the movement of colloidal particles in water, and it has high sensitivity at the micron level. Specifically, it mainly uses a supplementary light to irradiate the dark environment of groundwater, so as to see the colloidal particles in the water. After being irradiated by the supplementary light, the colloidal particles in the water form scattered 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 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 at the detection position in the vertical direction. And calculate the cross-sectional area of the well pipe through the inner diameter of the well pipe, and then calculate the water yield per unit volume at the detection position by multiplying the flow velocity by the cross-sectional area of the well pipe.

[0025] Through the above method, the present invention successively lowers the detection component between each adjacent aquifer in the well pipe, so as to measure and calculate the water yield between each adjacent aquifer, thereby facilitating and accurately evaluating the dynamic changes of groundwater, predicting the water inrush risk, and rationally utilizing groundwater resources. In addition, the method for measuring the flow velocity of the present invention can detect the movement of micron-sized particles and micron-sized flow velocity. In the case of low flow velocity, its measurement accuracy is higher. At the same time, it can be used portably and can be used for real-time online monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0027] Figure 1 is a schematic diagram of the usage state of the present invention;

[0028] Figure 2 is an internal detail diagram of the flow velocity probe in the present invention;

[0029] Figure 3 is a working principle diagram of the flow velocity probe in the present invention;

[0030] Figure 4 is a partial detail diagram of the flow velocity probe in Embodiment 3.

[0031] DESCRIPTION OF THE REFERENCE NUMERALS

[0032] 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 velocity probe; 801. Cable; 802. Sealing joint; 803. Probe housing; 804. Camera; 805. Sleeve; 806. Objective lens; 807. Supplementary light; 808. Reflector; 809. Window; 810. Second motor; 811. First motor; 812. Light channel; 9. Well diameter measuring instrument; 10. Aquifer position; 11. Colloidal particle. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below. Embodiment 1

[0034] As Figures 1 - 3 shown, the present invention provides a device for measuring the groundwater inflow, including a wire reel 3, a detection component and a controller;

[0035] A cable 801 is wound around the wire reel 3. One end of the cable 801 is connected to an external power supply 1, and the other end is connected to the detection component and supplies power to the detection component. The wire reel 3 lowers the detection component to the detection position in the well pipe 6 through the cable 801, as Figure 1 shown. The detection position is the position between two adjacent aquifers. Figure 1 The well pipe 6 and the positions 10 of each aquifer are illustrated in . During actual measurement, the water levels of each aquifer are known (i.e., pre-measured) and recorded in the local geological exploration data. And the underground water level remains unchanged in principle.

[0036] The detection component in this application includes a water temperature and water level probe 7, a flow velocity probe 8 and a well diameter measuring instrument 9. 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. During actual measurement, the water levels of each aquifer can be known from the geological exploration data, and the water level at the position between two adjacent aquifers (i.e., the detection position) can be inferred. Therefore, when the detection component in the present invention is lowered into the well pipe 6, the depth of the detection component being lowered can be monitored in real time through the water temperature and water level probe 7, and the detection component can be accurately lowered to the detection position, and then the flow velocity at this position is measured by the flow velocity probe 8.

[0037] As Figure 2 shown, the flow velocity probe 8 includes a probe housing 803 arranged vertically. The probe housing 803 has a hollow interior and a sealed exterior structure; a sealed joint 802 for connecting to the cable 801 is provided at the top of the probe housing 803, and the cable 801 can supply power to the 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. The imaging end of the camera 804 faces the objective lens 806; as Figure 2As shown in the figure, a sleeve 805 is provided between the camera 804 and the objective lens 806. The sleeve 805 is vertically arranged. The inside of the sleeve 805 is a hollow structure, and both ends thereof are provided with openings. 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 mount and fix the camera 804 and the objective lens 806 and to connect the two. As Figure 2 shown, a reflector 808 is provided directly below the objective lens 806; a window 809 is provided on the outer wall of the probe housing 803. The window 809 is located at the position of the reflector 808. The reflector 808 is inclined toward the window 809 and cooperates with the objective lens, that is, the situation outside the window 809 can be projected onto the objective lens 806 through the reflector 808. A supplementary light 807 is provided inside the window 80, and the supplementary light 807 is arranged facing the window 809; the supplementary light 807 can irradiate the dark environment in the groundwater through the window 809, so as to see the colloidal particles 11 in the water. After the colloidal particles 11 in the water are irradiated by the supplementary light 807, scattered light is formed. As Figure 3 shown, the scattered light is projected onto the objective lens 806 through the reflector 808. The objective lens 806 images the information of the colloidal particles 11 onto the camera 804. The camera 804 transmits the captured video information to the controller through the cable 801. The camera 804 in this 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. 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. The control unit 4 can calculate the moving speed of the colloidal particles 11 in the groundwater through particle recognition technology and convert the moving speed of the colloidal particles 11 to the vertical direction through vector calculation, so as to obtain the flow rate of the water flow at the detection position in the vertical direction. The storage unit 5 is used to store the video information, the analysis and 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

[0038] As Figure 3 shown, the window 809 in this embodiment two is arranged around the circumference of the probe housing 803, that is, arranged around the probe housing 803 in a circle. And the supplementary light 807 in this embodiment two is located on one side of the reflector 808 and is close to the window 809. The supplementary light 807 does not affect the reflector 808 to project light onto the objective lens 806. And the supplementary light 807 and the reflector 808 are a fixed component. A first motor 811 for driving the fixed component to rotate around the central axis of the objective lens 806 is provided below the fixed component. As Figure 3As shown in the figure, in the second embodiment, two supplementary light lamps 807 are provided, which are respectively located at the upper and lower positions of the reflector 808, and the two supplementary light lamps 807 are respectively located at the upper side and the lower side of one side of the reflector 808, rather than directly above the reflector 808. Therefore, it does not 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 supplementary light lamp 807 to rotate together, so as to irradiate the colloidal particles 11 at different external positions and observe their movement conditions.

[0039] Other structures in the second embodiment are the same as those in the first embodiment. Embodiment Three

[0040] As Figure 4 shown, in the third embodiment, the window 809 is arranged around the circumferential direction of the probe housing 803, which is the same as that in the second embodiment. And a plurality of supplementary light lamps 807 are provided, and the plurality of supplementary light lamps 807 are arranged in a circle along the circumferential direction of the window 809. Therefore, the supplementary light lamps 807 can irradiate 360 degrees. As Figure 4 shown, a light channel 812 is provided at the center of the plurality of supplementary light lamps 807. The reflector 808 is located below the supplementary light lamps 807 and is directly opposite to the light channel 812, and the light channel 812 is large enough for the reflected light of the reflector 808 to pass through the light channel 812 and reach the objective lens 806. Therefore, the supplementary light lamps 807 do not affect the reflector 808 from projecting light onto the objective lens 806. A second motor 810 for driving the reflector 808 to rotate around the central axis of the objective lens 806 is provided below the reflector 808. In the third embodiment, the reflector 808 and the supplementary light lamps 807 are not of an integral structure. The supplementary light lamps 807 are arranged in a circle and can irradiate the colloidal particles 11 at various positions, while the reflector 808 can rotate to project light onto the colloidal particles 11 at different positions. In addition, in the third embodiment, the supplementary light lamps 807 can be located above or below the reflector 808, or a circle of supplementary light lamps 807 can be provided above and below the reflector 808 respectively, as Figure 4 shown.

[0041] Other structures in the third embodiment are the same as those in the first embodiment. Embodiment Four

[0042] A method for measuring the groundwater inflow uses the above-mentioned equipment and includes the following steps:

[0043] S1. Use the power supply 1 to supply power to the detection component, and use the wire reel 3 to lower the detection component into the well pipe 6. During the process of lowering the detection component, use the water temperature and water level probe 7 to measure the water temperature and water level in real time, so as to accurately lower the detection component to the detection position;

[0044] S2. Measure the inner diameter of the well pipe 6 through the well diameter measuring instrument 9;

[0045] S3. Measure the flow velocity and direction of groundwater at the detection position in the vertical direction through the flow velocity probe 8. First, the supplementary light 807 irradiates the colloidal particles 11 in the water through the window 809. After being irradiated by the supplementary light 807, the colloidal particles 11 form scattered light, and 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, and the camera 804 transmits the captured video information to the controller through the cable 801;

[0046] S4. The control unit 4 in the controller receives the video information, analyzes the moving direction of the colloidal particles 11 in the groundwater at the detection position through the video information, 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, obtains the flow velocity of the water flow at the detection position in the vertical direction;

[0047] S5. The control unit 4 calculates the cross-sectional area of the well pipe 6 through 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;

[0048] S6. The detection position is the position between two adjacent aquifers; in the way of S1 - S5, the detection assembly is successively lowered to the detection positions between adjacent aquifers in the well pipe 6, measure the water temperature, water level, well diameter and flow velocity of each detection position, and calculate the water inflow of each detection position through the control unit 4;

[0049] 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 well diameter measuring instrument 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.

[0050] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A groundwater inflow measurement device, characterized in that, It includes a cable reel, a detection component, and a controller; A cable is wound around the cable reel. One end of the cable is connected to a power supply, and the other end is connected to the detection component to supply 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 position is the position between two adjacent aquifers; The detection component includes a water temperature and water level probe, a flow velocity probe, and a well diameter measuring instrument. The well diameter measuring instrument is used to measure the inner diameter of the well pipe. The flow velocity probe measures the flow velocity and flow direction of the groundwater at the detection position in the vertical direction. The flow velocity probe includes a vertically arranged probe housing. The probe housing is a hollow structure. A camera is provided inside the probe housing. An objective lens is provided below the camera. The imaging end of the camera faces the objective lens; A reflector is provided directly below the objective lens; A window is provided on the outer wall of the probe housing. The window is located at the position of the reflector. The reflector is inclined towards the window direction and cooperates with the objective lens; A supplementary light is provided inside the window. The supplementary light is arranged towards the window; The light of the supplementary light passes through the window and irradiates the colloidal particles in the water. After being irradiated by the supplementary light, the colloidal particles in the water form scattered light, which 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 the 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 velocity and flow direction of the colloidal particles in the water, and calculates the flow velocity of the water at the detection position in the vertical direction through vector calculation. The water inflow per unit volume at the detection position is calculated by multiplying the flow velocity by the cross-sectional area of the well pipe; 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. The groundwater inflow measuring device according to claim 1, characterized in that, A sleeve is provided between the camera and the objective lens. The inside of the sleeve is a hollow structure, and both ends are provided with openings. The camera is fixed at the top of the sleeve, and the objective lens is fixed at the bottom of the sleeve.

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

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

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

6. The groundwater inflow measuring device according to claim 4, characterized in that, There are multiple supplementary lights. The multiple supplementary lights are arranged in a circle along the circumference of the window. A light channel is provided at the center of the multiple supplementary lights. The reflector is directly opposite the light channel. A second motor for driving the reflector to rotate around the central axis of the objective lens is provided below the reflector.

7. A method for measuring the groundwater inflow rate, using a groundwater inflow rate measuring device according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Power the detection component using the power supply, and lower the detection component into the well pipe using the cable reel. During the lowering process of the detection component, use the 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. Measure the inner diameter of the well pipe using the well diameter measuring instrument; S3. Measure the flow velocity and direction of groundwater at the detection position in the vertical direction through a flow velocity probe. First, the supplementary light lamp irradiates the colloidal particles in the water through the window. After being irradiated by the supplementary light lamp, the colloidal particles form scattered light, which is projected onto the objective lens through the reflector. The objective lens focuses the particle information onto the camera, and the camera transmits the captured video information to the controller through the cable. S4. The control unit in the controller receives the video information, analyzes the moving direction of the colloidal particles in the groundwater at the detection position from the video information, and calculates the moving speed of the colloidal particles. Then, through vector calculation, the moving speed of the colloidal particles is converted to the vertical direction, 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 through 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. By the method of S1 - S5, the detection assembly is successively lowered to the detection positions between adjacent aquifers in the well pipe, measure the water temperature, water level, well diameter and flow velocity at each detection position, and calculate the water inflow at each detection position through 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 well diameter measuring instrument, and the analysis and calculation results of the control unit are all stored in the storage unit.

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