A borehole television flow velocity and direction measuring instrument and method for quickly locating aquifers

Abstract

The present invention provides a borehole television flow velocity and direction measuring instrument and method for quickly locating an aquifer, comprising a measuring probe, a signal transmission module and a computer; the measuring probe is provided with a simulated fisheye camera, an electrolysis electrode and an industrial camera; the electrolysis electrode is used to electrolyze groundwater to generate bubbles; the simulated fisheye camera is used to collect image information in the borehole and image information of the bubbles and transmit them to the computer; the image received by the computer is displayed to perform television imaging logging of the borehole wall and display the bubble movement trajectory; the industrial camera, when the bubble movement trajectory is not vertically upward, the industrial camera collects the image in the borehole and transmits the image information to the computer through the signal transmission module; the computer calculates the flow velocity and flow direction of the groundwater according to the image collected by the industrial camera. The electrolysis electrode electrolyzes water to generate bubbles, and the groundwater outlet point is found by shooting the bubble movement trajectory and the borehole wall image with the simulated fisheye camera, so as to locate the aquifer.

Description

Technical Field

[0001] The present invention relates to the identification and positioning of aquifers, and in particular to a borehole television flow velocity and direction measuring instrument and method for quickly positioning aquifers. Background Technology

[0002] At present, the main methods used for monitoring groundwater flow velocity and direction at home and abroad are geophysical exploration and tracer methods. Geophysical exploration methods mainly include electrical method and ultrasonic detection; tracer methods mainly include tracer placement method and temperature field tracer method. The results of the tracer method are more reliable. The tracer method must first determine the flow direction, and then arrange the flow velocity observation boreholes according to the flow direction. This method requires the design of at least 2 boreholes, and the engineering cost is relatively high. The placement of tracers will cause pollution to groundwater, especially radioactive tracers. In addition, traditional methods cannot be automated, so the labor cost is high and the labor intensity is high.

[0003] In recent years, in order to protect the ecological environment and strictly control groundwater exploitation, the country has strengthened the construction of groundwater monitoring systems, monitored the velocity and direction of groundwater, predicted groundwater overexploitation areas, and carried out groundwater pollution investigations and groundwater overexploitation management. The task of measuring and monitoring groundwater velocity and direction is becoming increasingly heavy, and an instrument and method for measuring groundwater velocity and direction that can quickly identify aquifers is in urgent need of development.

[0004] With the continuous application and promotion of machine vision measurement technology in various industries, micro-particle image velocity measurement technology has been applied in the measurement of groundwater flow velocity and direction.

[0005] However, the vertical distribution of groundwater aquifers is often uneven. Due to the small field of view of the microscopic particle imaging system, it is often necessary to carry out salinization logging and other means to characterize the location of the aquifer before applying the microscopic imaging system, which has low construction efficiency. In the case of failure to obtain detailed characterization data of groundwater aquifers, the construction efficiency of this technology will be greatly reduced. SUMMARY OF THE INVENTION

[0006] Aiming at the problems existing in the prior art, the present invention provides a borehole television flow velocity and direction measuring instrument and method for quickly locating aquifers, which solves the problem that the traditional flow velocity and direction meter cannot quickly identify and locate aquifers due to the unevenness of groundwater aquifers.

[0007] The present invention is achieved through the following technical solutions:

[0008] A borehole television flow velocity and direction measuring instrument for quickly locating aquifers, comprising a measuring probe, a signal transmission module and a computer;

[0009] The measuring probe is equipped with a simulated fisheye camera, an electrolytic electrode and an industrial camera, as well as a zoom industrial lens used in conjunction with the industrial camera;

[0010] The electrolysis electrode is used for electrolyzing groundwater;

[0011] The simulated fish-eye camera is used to collect the image information in the borehole and the image information of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode. The simulated fish-eye camera transmits the image information to the computer through the signal transmission module; the computer displays the images collected by the simulated fish-eye camera to perform borehole wall televiewer logging and display the bubble movement trajectory;

[0012] The industrial camera, when the movement trajectory of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode is not vertically upward, the industrial camera collects the images in the borehole and transmits the image information to the computer through the signal transmission module; the computer calculates the flow rate and flow direction of the groundwater according to the images collected by the industrial camera.

[0013] Preferably, a temperature and pressure sensor is further provided in the measurement probe; when the movement trajectory of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode is no longer vertically upward, the temperature and pressure sensor collects the temperature and pressure information in the borehole and transmits the temperature and pressure information to the computer through the signal transmission module.

[0014] Preferably, a three-axis sensor is further provided in the measurement probe. When the movement trajectory of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode is no longer vertically upward, the three-axis sensor collects the three-axis information of the measurement probe and transmits the three-axis information to the computer; after obtaining the three-axis information of the measurement probe, the computer calibrates the images collected by the industrial camera and calculates the flow rate and flow direction of the groundwater.

[0015] Preferably, the measurement probe includes a lower part of the measurement probe, an upper part of the measurement probe, and a connecting pipe for connecting the lower part and the upper part of the measurement probe;

[0016] The lower part of the measurement probe includes a lower housing. A simulated fish-eye camera and a light source located above the simulated fish-eye camera are arranged in the lower housing, and the lens of the simulated fish-eye camera faces upward; a first glass sheet and an electrolysis electrode are arranged at the top of the lower housing, and the electrolysis electrode extends out of the lower housing;

[0017] The upper part of the measurement probe includes an upper housing. A second glass sheet opposite to the first glass sheet is arranged at the bottom of the upper housing; an industrial camera and a zoom industrial lens for cooperating with the industrial camera are arranged in the upper housing.

[0018] Further, a focusing control ring, a zoom control ring and an aperture control ring for adjusting the lens magnification of the zoom industrial lens are further arranged in the upper housing.

[0019] Further, a three-stage servo control motor for controlling and adjusting the focusing control ring, the zoom control ring and the aperture control ring is further arranged in the upper housing.

[0020] Preferably, the signal transmission module includes a signal control conversion box, a 485 analog signal to optical circuit module, a 485 signal conversion control board, a gigabit Ethernet to optical circuit module, and signal transmission cables;

[0021] The 485 electrical signals of the images collected by the analog fisheye camera are transmitted to the 485 analog signal to optical circuit module through the 485 signal conversion control board, and are converted into optical signals by the 485 analog signal to optical circuit module; the converted optical signals are transmitted to the signal conversion control box through the signal transmission cables, and the signal conversion control box converts the optical signals into 485 electrical signals and transmits them to the computer;

[0022] The digital image signals collected by the industrial camera are converted into optical signals through the gigabit Ethernet to optical circuit module, and are transmitted to the signal control conversion box through the signal transmission cables, and the signal control conversion box then converts the optical signals into gigabit Ethernet signals and transmits them to the computer.

[0023] A method for measuring the flow velocity and direction of a borehole television for quickly locating an aquifer, based on the said measuring instrument, includes the following steps:

[0024] First step, put the measuring probe into the borehole constructed in advance;

[0025] Second step, turn on the electrolytic electrode to electrolyze the groundwater to generate bubbles, turn on the analog fisheye camera to collect the image information in the borehole and the image information of the bubbles and display them on the computer;

[0026] Third step, while moving the measuring probe downward uniformly in the borehole, observe the movement trajectory of the bubbles in the borehole on the computer at the same time, and carry out borehole wall television imaging logging;

[0027] Fourth step, when the movement trajectory of the bubbles is no longer vertical and shows an offset in a certain direction, it is close to the groundwater outlet point. Combine the borehole wall television imaging logging results to determine the groundwater outlet point, and at this time, the measuring probe stops moving downward;

[0028] Fifth step, based on the horizontal offset distance of the bubbles, initially judge the flow velocity range of the groundwater. Taking the flow velocity range as 1 / 3 - 2 / 3 of the speed upper limit of the industrial camera as the standard, determine the speed upper limit of the industrial camera, and calculate the lens magnification according to this speed upper limit;

[0029] Sixth step, turn off the electrolytic electrode; turn on the industrial camera, and adjust the zoom industrial lens to the lens magnification calculated in the fifth step;

[0030] Seventh step, the industrial camera collects images and transmits them to the computer;

[0031] Eighth step, the computer calculates the flow velocity and direction of the groundwater according to the images obtained in the seventh step.

[0032] Preferably, in the eighth step, the specific calculation of the flow velocity and direction of groundwater is as follows: the cross-frame displacement of particles is calculated through the PTV and PIV algorithms, and then the particle velocity is obtained by dividing it by the reciprocal of the camera frequency of the industrial camera, and further the flow velocity and direction of groundwater are obtained.

[0033] Compared with the prior art, the present invention has the following beneficial technical effects:

[0034] The borehole television flow velocity and direction measuring instrument of the present invention includes an electrolytic electrode and a simulated fish-eye camera. The electrolytic electrode electrolyzes water to generate hydrogen and oxygen, forming bubbles. The movement trajectory of the bubbles and the image of the borehole wall are captured by the simulated fish-eye camera. When the groundwater outlet point is not reached, the movement trajectory of the bubbles is vertically upward. When the groundwater outlet point is reached, due to the flow of groundwater, the movement trajectory of the bubbles is no longer vertically upward, but deviates to a certain horizontal direction. Then, the groundwater outlet point can be found based on the image of the borehole wall, and thus the groundwater aquifer can be located. At this time, the industrial camera can be used to measure parameters such as the groundwater flow velocity. The present invention combines the electrolytic electrode and the simulated fish-eye camera, which can make up for the defect that the digital camera has a small field of view and cannot quickly locate the aquifer, can quickly identify the aquifer, and improve the efficiency and accuracy of multi-parameter measurement of the groundwater aquifer based on the microscopic particle image velocimetry technology. The device of the present invention is mainly applied to the measurement of multi-parameters of the groundwater flow field, mainly but not limited to the measurement of multi-parameters of groundwater in boreholes.

[0035] The method of the present invention electrolyzes water through the electrolytic electrode to generate bubbles, and captures the movement trajectory of the bubbles and the image of the borehole wall through the simulated fish-eye camera, which can quickly identify the aquifer and improve the efficiency and accuracy of multi-parameter measurement of the groundwater aquifer based on the microscopic particle image velocimetry technology. Brief Description of the Drawings

[0036] Figure 1 It is a schematic diagram of the overall borehole television flow velocity and direction measuring instrument for quickly locating the aquifer according to the present invention.

[0037] Figure 2 It is a schematic diagram of the structure of the measurement probe according to the present invention.

[0038] Figure 3 It is a schematic diagram of the internal composition of the lower part of the measurement probe. (a) is a top view, (b) is a sectional view, and (c) is a bottom view.

[0039] Figure 4 It is a schematic diagram of the internal composition of the upper part of the measurement probe.

[0040] Figure 5 It is a schematic diagram of the signal transmission cable.

[0041] Figure 6It is a schematic diagram of a signal control conversion box.

[0042] In the figure: measurement probe 1, signal transmission cable 2, signal control conversion box 3, computer 4, network cable 5, USB cable 6, lower part of the measurement probe 7, connecting pipe 8, upper part of the measurement probe 9, temperature and pressure sensor 10, 485 signal conversion control board 11, analog fish-eye camera 12, power transformer circuit board 13, electrolytic electrode 14, light source 15, first glass sheet 16, filter screen 17, second glass sheet 18, zoom industrial lens 19, focus control ring 20, zoom control ring 21, aperture control ring 22, industrial camera 23, three-stage servo control motor 24, 485 analog signal to optical circuit module 25, gigabit network to optical circuit module 26, power transformer module 27, first socket 29, plug 30, load multi-core optical and electrical composite cable 31, second socket 32. Specific implementation mode

[0043] The following further elaborates on the present invention in conjunction with specific embodiments, which is an explanation rather than a limitation of the present invention.

[0044] As Figure 1 shown, the borehole television flow velocity and flow direction measuring instrument for quickly positioning aquifers according to the present invention includes a measurement probe 1, a signal transmission cable 2, a signal control conversion box 3, a computer 4, a network cable 5, and a USB cable 6.

[0045] As Figure 2 shown, the measurement probe 1 includes a lower part of the measurement probe 7 and an upper part of the measurement probe 9, as well as a connecting pipe 8 connecting the lower part of the measurement probe 7 and the upper part of the measurement probe 9.

[0046] As Figure 3 shown, the lower part of the measurement probe 7 includes: a lower housing, a temperature and pressure sensor 10, a 485 signal conversion control board 11, an analog fish-eye camera 12, a power transformer circuit board 13, and a ring-shaped uniform light source 15 are arranged inside the lower housing; the bottom of the lower housing is open, and a filter screen 17 is arranged at the opening, and a first glass sheet 16 is arranged at the top of the lower housing. An electrolytic electrode 14 is arranged at the top of the lower housing, and the electrolytic electrode 14 extends out of the lower housing and directly contacts the groundwater. The light source 15 is located above the analog fish-eye camera 12, and the lens of the analog fish-eye camera 12 faces upward. The power transformer circuit board 13 is used to adjust the brightness of the light source 15 and supply power to the temperature and pressure sensor 10, the analog fish-eye camera 12, and the light source 15. The filter screen 17 can protect the temperature and pressure sensor 10.

[0047] As Figure 4As shown in the figure, the upper part 9 of the measurement probe includes: an upper housing, and a second glass sheet 18 opposite to the first glass sheet 16 is provided at the bottom of the upper housing; an industrial camera 23, a zoom industrial lens 19 used in cooperation with the industrial camera 23, a focus control ring 20, a zoom control ring 21 and an aperture control ring 22 used in cooperation with the zoom industrial lens 19, a three-stage servo control motor 24 for controlling the focus control ring 20, the zoom control ring 21 and the aperture control ring 22, and a 485 analog signal to optical circuit module 25, a gigabit Ethernet to optical circuit module 26 and a power transformer module 27. The second glass sheet 18 can protect the zoom industrial lens 19 to prevent groundwater from entering the instrument and damaging the circuit. The power transformer module 27 is used to provide power with different voltages for the industrial camera, the 485 analog signal to optical circuit module 25 and the gigabit Ethernet to optical circuit module 26.

[0048] The electrolysis electrode 14 is used for electrolyzing groundwater. The analog fish-eye camera 12 is used to collect the image information in the borehole and the image information of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode 14. The analog fish-eye camera 12 transmits the image information to the computer 4. The computer 4 displays the images collected by the analog fish-eye camera 12 for borehole wall television imaging logging and displays the bubble movement trajectory.

[0049] For the industrial camera 23, when the movement trajectory of the bubbles generated by the electrolysis of groundwater by the electrolysis electrode 14 is no longer vertically upward but deviates to a certain horizontal direction, the industrial camera 23 collects the image in the borehole, the temperature and pressure sensor 10 collects the temperature and pressure in the borehole, and the three-axis sensor collects the three-axis information of the measurement probe 1; the images collected by the industrial camera 23, the temperature and pressure collected by the temperature and pressure sensor 10, and the three-axis information collected by the three-axis sensor are all transmitted to the computer 4.

[0050] The computer 4 calibrates the images collected by the industrial camera 23 according to the three-axis information of the measurement probe 1, calculates the cross-frame displacement amount in the particles through the PTV and PIV algorithms, and then divides it by the reciprocal of the frequency of the industrial camera 23 to calculate the particle velocity, and further measures the flow field parameters such as the flow rate, flow direction, temperature, and pressure of groundwater.

[0051] As Figure 6 As shown in the figure, the signal control conversion box 3 is used to convert the optical signal into a gigabit Ethernet signal or a 485 analog electrical signal, or convert the electrical signal into an optical signal, and output the 485 analog electrical signal to a USB signal; the signal control conversion box 3 contains a PLC, and the PLC is used to control the brightness of the light source 15 and adjust the magnification of the zoom industrial lens through the servo electrode; the signal control conversion box 3 is also used to control the on-off state of the electrolysis electrode 14.

[0052] The computer 4 is also used to control the on-off states of the analog fish-eye camera 12 and the industrial camera 23.

[0053] The electrical signals sent by the computer 4 to control the pseudo-fish-eye camera 12, and the electrical signals sent by the signal control conversion box 3 to control the electrolytic electrode 14, the three-stage servo control motor 24, and the light source 15 are all converted into optical signals by the signal control conversion box 3 and sent to the 485 analog signal to optical conversion circuit module 25. The 485 analog signal to optical conversion circuit module 25 then converts the optical signals into electrical signals to control the electrolytic electrode 14, the three-stage servo control motor 24, the pseudo-fish-eye camera 12, and the light source 15.

[0054] The control signal sent by the computer 4 to control the industrial camera 23 is sent to the signal control conversion box 3 through a gigabit network cable. The signal control conversion box 3 converts the electrical signal into an optical signal and transmits it through another optical fiber of the signal transmission cable 2 to the gigabit network to optical conversion circuit module 26. The gigabit network to optical conversion circuit module 26 converts the optical signal into a gigabit network signal to control the industrial camera 23. The digital image signal of the industrial camera 23 is then converted into an optical signal by the gigabit network to optical conversion circuit module 26 and sent to the signal control conversion box 3 through the signal transmission cable 2. The signal control conversion box 3 then converts the optical signal into a gigabit network signal and sends it to the computer 4.

[0055] The 485 electrical signal of the image collected by the analog fish-eye camera 12 is transmitted to the 485 analog signal to optical conversion circuit module 25 through the 485 signal conversion control board 11. The 485 analog signal to optical conversion circuit module 25 converts the 485 electrical signal of the analog fish-eye camera 12 into a 485 optical signal. The 485 optical signal is transmitted to the signal conversion control box 3 through the signal transmission cable 2. The signal conversion control box 3 converts the 485 optical signal into a 485 electrical signal and transmits it to the computer 4 through the USB cable 6.

[0056] The 485 signal of the temperature and pressure sensor 10 is connected in series to the 485 analog signal to optical conversion circuit module 25 through the 485 signal conversion control board 11. The 485 analog signal to optical conversion circuit module 25 converts the 485 electrical signals of the temperature, pressure, and three-axis sensors into optical signals, which are transmitted to the signal conversion control box 3 through an optical fiber of the signal transmission cable 2. The signal conversion control box 3 then converts the optical signal into an electrical signal and transmits it to the computer 4 through the USB cable 6.

[0057] As Figure 5 shown, the signal transmission cable 2 consists of 4 parts: 2 multi-mode optical fibers and 2 0.75 copper wires, the first socket 29 fixed to the top of the upper part 9 of the measuring probe, two plugs 30, the load multi-core optical and electrical composite cable 31 connecting the two plugs 30, and the second socket 32 fixed on the signal conversion control box 3. One plug 30 is connected to the first socket 29, and the other plug 30 is connected to the second socket 32.

[0058] The industrial camera 23 can be a CCD industrial camera or a COMS industrial camera.

[0059] The present invention combines a fish-eye camera and electrolyzed water technology with a traditional flow velocity and direction meter, which can quickly identify the location of the aquifer. The specific method includes the following steps:

[0060] First step, connect the measurement probe 1, signal transmission cable 2, signal control conversion box 3, and computer 4 in sequence, and slowly lower the measurement probe 1 into the pre-constructed borehole.

[0061] Second step, turn on the electrolysis electrode 4 through the electrolysis switch of the signal control conversion box 3. The electrolysis electrode 4 electrolyzes groundwater to generate hydrogen and oxygen; turn on the simulated fish-eye camera 12 through computer software, and adjust the brightness through the light source brightness knob of the signal control conversion box 3.

[0062] The electrical signals sent from the computer 4 and the signal control conversion box 3 to control the electrolysis electrode 14, three-stage servo control motor 24, light source 15, and simulated fish-eye camera 12 are converted into optical signals by the optoelectronic conversion module of the signal control conversion box 3 and sent to the 485 analog signal to optical circuit module 25. The optical signals are then converted back into electrical signals to control the electrolysis electrode 14, three-stage servo control motor 24, simulated fish-eye camera 12, and light source 15.

[0063] Third step, while slowly moving the measurement probe 1 downward at a uniform speed into the borehole, observe the movement trajectory of the bubbles in the hole and conduct borehole wall television imaging logging; when not reaching the groundwater outlet point, the movement trajectory of the bubbles is vertically upward.

[0064] The simulated fish-eye camera 12 in the lower part 7 of the measurement probe is mainly connected to the 485 analog signal to optical circuit module 25 through the 485 signal conversion control board 11 for the 485 electrical signal. The 485 analog signal to optical circuit module 25 converts the 485 electrical signal of the simulated fish-eye camera 12 into an optical signal through the optical module and transmits it to the signal conversion control box 3 through an optical fiber of the signal transmission cable 2. The optoelectronic conversion module in the signal conversion control box 3 then converts the optical signal back into an electrical signal and transmits it to the computer 4 through the USB interface.

[0065] Fourth step, when the movement trajectories of hydrogen and oxygen are no longer vertical and show an obvious deviation in a certain direction, it is close to the groundwater outlet point. Combining the borehole wall television logging results, quickly determine the groundwater aquifer outlet point, that is, locate the underground aquifer. At this time, the measurement probe 1 stops moving downward.

[0066] Step 5: Based on the horizontal offset distance of the bubbles captured by the simulated fisheye camera 12, preliminarily determine the flow velocity range of the groundwater. Taking the flow velocity range within 1 / 3 - 2 / 3 of the speed upper limit of the industrial camera 23 as the standard, determine the speed upper limit of the industrial camera 23. Calculate the lens magnification of the zoom industrial lens 19 according to this speed upper limit. At this time, the measurement accuracy is relatively high. The specific calculation method is as follows:

[0067] The speed upper limit of the industrial camera and the lens magnification of the zoom industrial lens 19 have the following relationship:

[0068]

[0069] The vertical resolution, pixel size, and camera frequency are all known parameters of the industrial camera. The speed upper limit is determined according to the flow velocity range, so that the lens magnification of the zoom industrial lens 19 can be obtained.

[0070] Step 6: Turn off the electrolysis electrode; turn on the industrial camera 23 through the computer 4. Select the corresponding lens magnification on the signal conversion control box 3. Control the zoom control ring 21 through the second gear of the three-stage servo control motor 24 to adjust the magnification of the lens; control the focus control ring 20 through the third gear of the three-stage servo control motor 24 to perform focusing; control the aperture control ring 22 through the first gear of the three-stage servo control motor 24 to adjust the light transmission amount. Control the light source brightness through the light source brightness knob.

[0071] The control signal of the industrial camera 23 sent by the computer 4 to control the camera is sent to the signal control conversion box 3 through the gigabit network cable. The electrical signal is converted into an optical signal and transmitted to the gigabit network to optical circuit module 26 through another optical fiber of the signal transmission cable 2. The optical signal is converted into a gigabit network signal to control the industrial camera 23. The digital image signal of the industrial camera 23 is then converted into an optical signal by the gigabit network to optical circuit module 26 and sent to the signal control conversion box 3, and then converted into a gigabit network signal and sent to the computer.

[0072] Step 7: Open the software for measuring the groundwater flow velocity and direction installed on the computer to start collecting the signals of the industrial camera 23, the temperature and pressure sensor 10, and the three-axis sensor.

[0073] The temperature and pressure sensor 10 in the lower part 7 of the measurement probe mainly serially connects the 485 signal to the 485 analog signal to optical circuit module 25 through the 485 signal conversion control board 11. The 485 analog signal to optical circuit module 25 converts the 485 electrical signals of the temperature, pressure, and three-axis sensors into optical signals through the optical module and transmits them to the signal control conversion box 3 through an optical fiber of the signal transmission cable 2. The optoelectronic conversion module in the signal control conversion box 3 then converts the signal into an electrical signal and transmits it to the computer 4 through the USB interface.

[0074] Step 8: After obtaining the three-position information of the measurement probe, computer 4 calibrates the images collected by industrial camera 23, calculates the cross-frame displacement in the particles through PTV and PIV algorithms, and then divides it by the reciprocal of the camera frequency to calculate the particle velocity, thereby quickly measuring flow field parameters such as the flow velocity, flow direction, temperature, and pressure of groundwater. The pressure parameter can be used to calculate the buried depth of the groundwater level based on the cable length.

Claims

1. A borehole television flow velocity and direction measuring instrument for quickly locating aquifers, characterized in that: It comprises a measuring probe (1), a signal transmission module and a computer (4); The measuring probe (1) is provided with a simulated fisheye camera (12), an electrolytic electrode (14), an industrial camera (23), and a zoom industrial lens (19) used in conjunction with the industrial camera (23); The electrolysis electrode (14) is used for electrolyzing groundwater; The simulated fisheye camera (12) is used to collect image information in the borehole and collect image information of bubbles generated by electrolysis of groundwater by the electrolysis electrode (14). The simulated fisheye camera (12) transmits the image information to the computer (4) through a signal transmission module; the computer (4) displays the image collected by the simulated fisheye camera (12) to perform television imaging logging of the borehole wall and display the bubble movement trajectory; The industrial camera (23) collects images in the borehole when the bubbles generated by the electrolysis electrode (14) electrolyze groundwater and their movement trajectory is not vertically upward, and transmits the image information to the computer (4) through a signal transmission module; the computer (4) calculates the flow velocity and flow direction of the groundwater based on the images collected by the industrial camera (23).

2. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 1 is characterized in that: A temperature and pressure sensor (10) is also provided in the measuring probe (1); when the movement trajectory of bubbles generated by the electrolysis electrode (14) electrolyzing groundwater is no longer vertically upward, the temperature and pressure sensor (10) collects temperature and pressure information in the borehole, and transmits the temperature and pressure information to the computer (4) via a signal transmission module.

3. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 1, characterized in that: A three-posture sensor is also provided in the measuring probe (1). When the movement trajectory of bubbles generated by the electrolysis electrode (14) when electrolyzing groundwater is no longer vertically upward, the three-posture sensor collects three-posture information of the measuring probe (1) and transmits the three-posture information to a computer (4). After obtaining the three-posture information of the measuring probe (1), the computer (4) calibrates the image collected by the industrial camera (23) and calculates the flow velocity and flow direction of the groundwater.

4. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 1, characterized in that: The measuring probe (1) comprises a measuring probe lower part (7) and a measuring probe upper part (9), and a connecting pipe (8) for connecting the measuring probe lower part (7) and the measuring probe upper part (9); The lower part (7) of the measuring probe comprises a lower shell, wherein a simulated fisheye camera (12) and a light source (15) located above the simulated fisheye camera (12) are arranged inside the lower shell, and the lens of the simulated fisheye camera (12) faces upward; a first glass sheet (16) and an electrolytic electrode (14) are arranged on the top of the lower shell, and the electrolytic electrode (14) extends out of the lower shell; The upper part (9) of the measuring probe comprises an upper shell, and a second glass sheet (18) opposite to the first glass sheet (16) is arranged at the bottom of the upper shell; an industrial camera (23) and a zoom industrial lens (19) used in conjunction with the industrial camera (23) are arranged in the upper shell.

5. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 4 is characterized in that: A focus control ring (20), a zoom control ring (21) and an aperture control ring (22) for adjusting the lens magnification of the zoom industrial lens (19) are also arranged in the upper shell.

6. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 5, characterized in that: A three-stage servo control motor (24) for controlling and adjusting a focus control circle (20), a zoom control circle (21) and an aperture control circle (22) is also arranged in the upper shell.

7. The borehole television flow velocity and direction measuring instrument for quickly locating aquifers according to claim 1, characterized in that: The signal transmission module comprises a signal control conversion box (3), a 485 analog signal optical conversion circuit module (25), a 485 signal conversion control board (11), a gigabit network optical conversion circuit module (26) and a signal transmission cable (2); The 485 electrical signal of the image collected by the simulated fisheye camera (12) is transmitted to the 485 analog signal optical conversion circuit module (25) through the 485 signal conversion control board (11), and is converted into an optical signal by the 485 analog signal optical conversion circuit module (25); the converted optical signal is transmitted to the signal conversion control box (3) through the signal transmission cable (2), and the signal conversion control box (3) converts the optical signal into a 485 electrical signal and transmits it to the computer (4); The digital image signal collected by the industrial camera (23) is converted into an optical signal through a Gigabit Ethernet to optical circuit module (26), and is transmitted to a signal control conversion box (3) through a signal transmission cable (2). The signal control conversion box (3) then converts the optical signal into a Gigabit Ethernet signal and transmits it to a computer (4).

8. A borehole television flow velocity and direction measurement method for quickly locating an aquifer, characterized in that: The measuring instrument according to claim 1 comprises the following steps: The first step is to place the measuring probe (1) into a pre-drilled hole; The second step is to open the electrolysis electrode (4) to electrolyze the groundwater to generate bubbles, and to open the simulated fisheye camera (12) to collect image information in the borehole and image information of the bubbles and display them on a computer; The third step is to move the measuring probe (1) downward at a constant speed in the borehole while observing the movement trajectory of the bubbles in the borehole on a computer to carry out TV imaging logging of the borehole wall; Step 4: When the bubble's trajectory is no longer vertical and deviates in a certain direction, it is close to the groundwater outlet point. Combined with the TV imaging logging results of the hole wall, the groundwater outlet point is determined. At this time, the measuring probe (1) stops moving downward. Step 5: Preliminarily determine the flow velocity range of groundwater based on the horizontal displacement distance of the bubble, determine the upper speed limit of the industrial camera (23) based on the flow velocity range of 1 / 3-2 / 3 of the upper speed limit of the industrial camera (23), and calculate the lens magnification based on the upper speed limit; Step 6: turn off the electrolysis electrode (4); turn on the industrial camera (23), and adjust the zoom industrial lens (19) to the lens magnification calculated in step 5; Step 7: The industrial camera (23) collects images and transmits them to the computer (4); In the eighth step, the computer (4) calculates the flow velocity and direction of the groundwater based on the image obtained in the seventh step.

9. The borehole television flow velocity and direction measurement method for quickly locating aquifers according to claim 8, characterized in that: In the eighth step, the velocity and direction of groundwater are calculated by calculating the cross-frame displacement of particles through the PTV and PIV algorithms, and then dividing it by the inverse of the camera frequency of the industrial camera (23) to obtain the particle velocity, and then obtaining the velocity and direction of groundwater.

Images