Water level measuring device and method for geotechnical engineering investigation

Abstract

The invention discloses a water level measuring device for geotechnical engineering investigation, which comprises a support rod and is characterized in that a movable lantern ring penetrates through the support rod, the movable lantern ring can move along the support rod and is used for adjusting the position of the movable lantern ring, the movable lantern ring is fixedly connected with symmetrical fixed rings, and the fixed rings are fixedly connected with the support rod. A fixing block is fixed between the symmetrical fixing rings, the fixing block is fixedly connected with a third motor, an output shaft of the third motor is fixedly connected with one side of a supporting plate, the other side of the supporting plate is fixedly connected with a first U-shaped pipe, and the upper ends of the two sides of the first U-shaped pipe are fixedly communicated through an upper communicating pipe; an upper camera is arranged between the two sides of the first U-shaped pipe. The invention relates to the technical field of geotechnical engineering, in particular to a water level measuring device and method for geotechnical engineering investigation, which can realize water level measurement.

Description

Technical Field

[0001] The present invention relates to the field of geotechnical engineering technology, and in particular to a water level measuring device and method for geotechnical engineering survey. Background Art

[0002] In geotechnical engineering investigation, accurate measurement of water level is of great significance for evaluating geological stability and groundwater resources. Traditional water level measurement methods usually rely on manual measurement, which is not only time-consuming and labor-intensive, but also susceptible to human errors. In addition, the complexity of the underwater environment also poses challenges to measurement. In order to solve these problems, automated and intelligent water level measurement devices have emerged, which can provide more accurate and efficient measurement results;

[0003] After searching, a geotechnical engineering survey water level measuring device with application number 201810790224.5 discloses a device for measuring groundwater level by squeezing an elastic film with groundwater and squeezing a colored liquid with the inflation of an air bag, so that the liquid level of the colored liquid changes. The device can effectively improve the accuracy of groundwater level measurement in rock and soil. The main drilling device is characterized in that the main drilling device is composed of a transparent tube, a drill bit, a rotating slice, a hollow tube and a cover plate. The drill bit is placed on one end of the hollow tube. The drill bit is an inverted conical structure, and the bottom vertex is provided with an arc-shaped concave surface. The other end of the hollow tube is horn-shaped. Multiple rotating slices are respectively placed outside the drill bit. The outer side of the rotating slice is an arc surface, and the bottom is a pointed structure. One end of the transparent tube is placed on the other end of the hollow tube and is connected with the hollow tube. The cover plate is placed on the other end of the transparent tube. The outer wall of the hollow tube is provided with a scale. The device is a device for measuring the groundwater level by squeezing the elastic film through groundwater and squeezing the colored liquid with the inflation of the airbag, so that the liquid level of the colored liquid changes. It can effectively improve the accuracy of measuring the groundwater level of rock soil, but this measurement method is often disturbed by pressure and buoyancy, and manual reading may cause errors. Therefore, a more accurate water level measurement device that does not require manual reading and avoids the influencing factors such as water buoyancy is designed. Summary of the invention

[0004] The invention provides a water level measuring device and method for geotechnical engineering investigation, which can realize water level measurement.

[0005] A water level measuring device for geotechnical engineering survey, comprising a support rod, characterized in that: the support rod is penetrated by a movable sleeve, the movable sleeve can move along the support rod, and is used to adjust the position of the movable sleeve, the movable sleeve is fixedly connected to a symmetrical fixed ring, a fixed block is fixed between the symmetrical fixed rings, the fixed block is fixedly connected to a third motor, the output shaft of the third motor is fixedly connected to one side of a support plate, the other side of the support plate is fixedly connected to a U-shaped tube 1, the upper ends of both sides of the U-shaped tube 1 are fixedly connected through an upper connecting tube, an upper camera is arranged between the two sides of the U-shaped tube 1, the liquid level height in the U-shaped tube 1 corresponds to the upper camera, the upper camera is fixedly connected to an upper camera support seat, the upper cameras are respectively fixed on both sides of the upper camera support seat, and the two sides of the U-shaped tube 1 correspond to one of the upper cameras respectively;

[0006] The lower end of the support rod is rotatably connected to the support shaft, the support shaft is fixedly connected to the support block, the upper side of the support block is fixedly connected to the motor support, the motor support is fixed to the first motor, the output shaft of the first motor is fixedly connected to the lower camera fixing frame, the other side center of the lower camera fixing frame is fixedly connected to the U-shaped tube 2, the upper ends of both sides of the U-shaped tube 2 are fixedly connected through the lower connecting tube, the two sides of the lower connecting tube are respectively provided with lower cameras, the number of the lower cameras is two and they are respectively fixed on the two sides of the lower camera supporting seat, and the lower camera supporting seat fixes the support block;

[0007] An angle sensor is provided between the support rod and the U-shaped tube 1, and is used to determine the relative angle between the support rod and the U-shaped tube 1; an angle sensor is provided between the support rod and the U-shaped tube 2, and is used to determine the relative angle between the support rod and the U-shaped tube 2; a distance sensor receiving end is provided on the U-shaped tube 1, and a distance sensor transmitting end is provided on the U-shaped tube 2; the distance sensor is used to determine the distance between the U-shaped tube 1 and the U-shaped tube 2;

[0008] The two sides of the U-shaped tube 2 are fixedly connected by a lower connecting tube, and the height of the liquid level in the U-shaped tube 2 corresponds to the lower camera. Through the principle of communicating vessels, the liquid levels on both sides of the U-shaped tube 2 are in a level state. The lower camera shoots and monitors the liquid levels on both sides of the inside of the U-shaped tube 2 on both sides, and compares the liquid level information on both sides. When the liquid levels on both sides are one high and one low under the viewing angle of the camera, the controller controls the first motor to start and drive the lower camera fixing frame to perform compensatory rotation, thereby driving the U-shaped tube 2 to rotate until the liquid levels observed on both sides of the lower camera are at the same position of the two lower cameras, i.e., the starting position. At this time, the liquid levels on both sides of the U-shaped tube 2 photographed by the lower camera are aligned, so that the support block remains horizontal, so that various relative angle distances can be accurately judged;

[0009] The two sides of the U-shaped tube 1 are fixedly connected by the upper connecting tube. According to the communicating vessel principle, the liquid levels on the two sides of the U-shaped tube 1 are in a level state. The upper camera shoots and monitors the liquid levels on the two sides of the inside of the U-shaped tube 1 on both sides, and compares the liquid level information on both sides. When the liquid levels on the two sides are one high and one low under the viewing angle of the camera, the controller controls the third motor to start and drive the support plate to rotate for compensation, thereby driving the U-shaped tube 1 to rotate until the liquid levels observed on both sides of the upper camera are at the same position of the two upper cameras, that is, the starting position. At this time, the liquid levels on both sides of the U-shaped tube 1 photographed by the upper camera are aligned, so that the support plate remains horizontal, so that various relative angle distances can be accurately judged;

[0010] There is air above the liquid level in the U-shaped tube one and the U-shaped tube two, and the U-shaped tube one and the upper connecting tube are sealed, and the U-shaped tube two and the lower connecting tube are sealed, so there will be no air or liquid leakage. Under the combined action of gravity and water flow, the liquid levels on both sides of the U-shaped tube one are level, and the liquid levels in the U-shaped tube two and the U-shaped tube one will not be affected by the outside, thereby achieving accurate water level measurement.

[0011] According to the angle measured by the angle sensor after the liquid levels in the upper U-shaped tube 1 and the lower U-shaped tube 2 are aligned as photographed by the upper camera and the lower camera respectively, and the distance between the U-shaped tube 1 and the U-shaped tube 2 measured by the distance sensor, the vertical distance, i.e., the height of the water surface, is determined. In a right triangle, when the length of one side and two angles are known, the lengths of the other two sides are calculated by the sine theorem. The expression formula of the sine theorem is: When the three angles of the triangle are A, B, and C (where ∠C=90°), and the three opposite sides of the angles are a, b, and c, respectively, then: When the length of the hypotenuse c is known, then:

[0012] a=c·sinA

[0013] b=c·sinB

[0014] When the angle measured by the angle sensor on the first U-shaped tube, the angle measured on the second U-shaped tube, and the distance measured by the distance sensor are known, the height of the water surface can be obtained by the sine theorem.

[0015] As a further limitation of the technical solution, a limit strip is fixed on the lower side of the support block, a sleeve is fixed in the center of the limit strip, two ends of the sleeve are respectively hinged to symmetrical connecting rods, the other ends of the symmetrical connecting rods are respectively hinged to two ends of one side of the side strip, a triangular block is respectively fixed to the lower side of the side strip, a telescopic rod is arranged in the sleeve, a fixed rod is fixed to the upper side of the base, two ends of one side of the fixed rod are respectively hinged to swing arms, and the other ends of the swing arms are respectively hinged to the corresponding connecting rods.

[0016] As a further limitation of the technical solution, the upper side of the fixing rod fixes the lower end of the spring, the lower end of the spring is fixedly connected to the lower side of the sleeve, and the spring ring is sleeved on the telescopic rod.

[0017] As a further limitation of the technical solution, a group of evenly arranged gripping nails are respectively fixed to the lower inclined surface of each triangular block and the lower side of the base, and the central axis of the gripping nails fixed on the lower side of the triangular block is vertically arranged to the lower inclined surface of the triangular block.

[0018] As a further limitation of the present technical solution, the upper center of the lower camera fixing frame is fixedly connected to the buoyancy block.

[0019] As a further limitation of the technical solution, the upper end of the support rod is provided with a thread, and the upper end of the support rod is matched with a nut through the thread, and the nut prevents the movable ring from detaching from the support rod.

[0020] As a further limitation of the present technical solution, a controller is further provided, and the controller communicates with the upper camera and the lower camera via a transmission module, and the controller controls the first motor and the third motor.

[0021] A method for using a water level measuring device and method for geotechnical engineering investigation comprises the following steps:

[0022] Step 1: Make sure the nut is fixed on the upper end of the support rod to prevent the moving collar from falling off during use;

[0023] Step 2: Hold the support rod and place the device into the water. Since the movable ring and the fixed ring are both made of floating materials, under the action of buoyancy, the U-shaped tube 1, the upper connecting tube and the upper camera float on the water surface.

[0024] Step 3: Start the upper camera and the lower camera through the controller, and start monitoring the liquid levels of the U-shaped tube one and the U-shaped tube two respectively. When the controller detects that the liquid levels on both sides of the U-shaped tube one or the U-shaped tube two are in a high and low liquid level state in the corresponding upper camera or lower camera shooting, it will automatically control the third motor or the first motor to start, and adjust the position of the U-shaped tube one or the U-shaped rod two until the liquid levels on both sides of the image in the lower camera are in an aligned state and the liquid levels on both sides of the image in the upper camera are in an aligned state. At this time, the liquid levels observed on both sides of the upper camera are at the same position of the upper camera, that is, the starting position, and the liquid levels observed on both sides of the lower camera are at the same position of the lower camera, that is, the starting position, so that the support plate and the support block remain horizontal, so that various relative angle distances can be accurately judged, the angle sensor measures the angles of the U-shaped tube one and the U-shaped tube two respectively, and the distance sensor measures the distance between the U-shaped tube one and the U-shaped tube two;

[0025] Step 4: According to the law of sine, calculate the vertical distance, i.e. the height of the water surface.

[0026] As a further limitation of the present technical solution, in step 2, when the base contacts the bottom of the water, the support shaft and the support rod may rotate relative to each other due to the possible unevenness of the bottom of the water, so that the base completely contacts the bottom of the water. After the base touches the bottom, the base compresses the spring, and the base drives the telescopic rod to move along the sleeve. The base drives the swing arm to swing through the fixed rod, and the swing arm drives the connecting rod to swing. The connecting rod drives the triangular block to swing through the side strip, and the base and the triangular block respectively drive the corresponding gripping nails to contact the river bottom and insert into the bottom of the river channel, thereby supporting the entire device.

[0027] As a further limitation of the present technical solution, in step three, when the first motor works to drive the lower camera fixing frame to rotate, the buoyancy block has buoyancy, which can play an auxiliary role in adjusting the lower camera fixing frame, and reduce the resistance of the water flow to the lower camera fixing frame through buoyancy, thereby reducing the pressure of the first motor.

[0028] Compared with the prior art, the advantages and positive effects of the present invention are:

[0029] The arrangement of the upper camera and the lower camera enables the device to monitor the height of the liquid levels on both sides of the U-shaped tube 1 and the U-shaped tube 2 at the same time, thereby improving the accuracy of measurement. Through the automatic adjustment mechanism controlled by the motor, the device can ensure that the picture taken in the camera shows that the liquid levels in the U-shaped tube remain aligned. The lower camera performs shooting and monitoring on the liquid levels on both sides of the inside of the U-shaped tube 2 on both sides, and compares the liquid level information on both sides. When the liquid levels on both sides are high and low under the viewing angle of the camera, the controller controls the first motor to start and drive the lower camera fixing frame to perform compensatory rotation, thereby driving the U-shaped tube 2 to rotate until the liquid levels observed on both sides of the lower camera are at the same position of the two lower cameras, i.e., the starting position. At this time, the liquid levels on both sides of the U-shaped tube 2 photographed by the lower camera are aligned, thereby keeping the support block horizontal, thereby accurately judging various relative angle distances;

[0030] The upper camera shoots and monitors the liquid levels on both sides of the U-shaped tube 1, and compares the liquid level information on both sides. When the liquid levels on both sides are one high and one low under the camera's viewing angle, the controller controls the third motor to start and drive the support plate to rotate compensatingly, thereby driving the U-shaped tube 1 to rotate until the liquid levels observed on both sides of the upper camera are at the same position of the two upper cameras, i.e., the starting position. At this time, the liquid levels on both sides of the U-shaped tube 1 photographed by the upper camera are aligned, so that the support plate remains horizontal, thereby being able to accurately judge various relative angle distances;

[0031] According to the angle measured by the angle sensor after the liquid levels in the upper U-shaped tube 1 and the lower U-shaped tube 2 are aligned as captured by the camera, the vertical distance, i.e., the height of the water surface, is determined. In a right triangle, when the length of one side and two angles are known, the lengths of the other two sides are calculated using the sine theorem. The formula for the sine theorem is: When the three angles of the triangle are A, B, and C (where ∠C = 90°), and the opposite sides of the three angles are a, b, and c, respectively, then: When the length of the hypotenuse c is known, then:

[0032] a=c·sinA

[0033] b=c·sinB

[0034] When the angle measured by the angle sensor on the first U-shaped tube, the angle measured on the second U-shaped tube, and the distance measured by the distance sensor are known, the height of the water surface can be obtained by the sine theorem.

[0035] Through the design of the base and triangular blocks, the device can adapt to the uneven underwater environment and ensure stable measurement. The use of buoyancy blocks reduces the impact of water flow on the lower camera fixing frame and reduces the load on the motor.

[0036] The thread and nut design on the upper end of the support rod ensures the stability of the moving collar during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1 The three-dimensional Figure 1 ;

[0039] Figure 2 The three-dimensional Figure 2 ;

[0040] Figure 3 The three-dimensional Figure 3 ;

[0041] Figure 4 The three-dimensional Figure 4 ;

[0042] Figure 5 The three-dimensional Figure 5 ;

[0043] Figure 6The three-dimensional Figure 6 .

[0044] In the figure: 1. support rod; 2. nut; 3. movable sleeve; 4. fixed ring; 5. fixed block; 6. support plate; 7. U-shaped tube one; 8. support block; 9. connecting rod; 10. side strip; 11. triangle block; 12. grip nail; 13. base; 14. fixed rod; 15. telescopic rod; 16. spring; 17. swing arm; 18. U-shaped tube two; 19. lower camera fixing bracket; 20. lower camera support seat; 21. lower camera; 22. buoyancy block; 23. motor support; 24. first motor; 25. support shaft; 26. limit strip; 27. sleeve; 28. upper connecting tube; 29. ​​lower connecting tube; 30. third motor; 31. upper camera support seat; 32. upper camera. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0046] A water level measuring device for geotechnical engineering survey, comprising a support rod 1, characterized in that: the support rod 1 is penetrated by a moving collar 3, the moving collar 3 can move along the support rod 1, and is used to adjust the position of the moving collar 3, the moving collar 3 is fixedly connected to a symmetrical fixing ring 4, a fixing block 5 is fixed between the symmetrical fixing rings 4, the fixing block 5 is fixedly connected to a third motor 30, the output shaft of the third motor 30 is fixedly connected to one side of a support plate 6, the other side of the support plate 6 is fixedly connected to a U-shaped tube 7, the upper ends of both sides of the U-shaped tube 7 are fixedly connected through an upper connecting tube 28, an upper camera 32 is arranged between the two sides of the U-shaped tube 7, the liquid level in the U-shaped tube 7 corresponds to the upper camera 32, the upper camera 32 is fixedly connected to an upper camera support seat 31, the upper cameras 32 are respectively fixed on both sides of the upper camera support seat 31, and the two sides of the U-shaped tube 7 correspond to one upper camera 32 respectively;

[0047] The lower end of the support rod 1 is rotatably connected to the support shaft 25, and the support shaft 25 is fixedly connected to the support block 8. The upper side of the support block 8 is fixedly connected to the motor support 23, and the motor support 23 fixes the first motor 24. The output shaft of the first motor 24 is fixedly connected to the lower camera fixing frame 19. The center of the other side of the lower camera fixing frame 19 is fixedly connected to the U-shaped tube 18. The upper ends of both sides of the U-shaped tube 18 are fixedly connected through the lower connecting tube 29. The lower cameras 21 are respectively arranged on both sides of the lower connecting tube 29. There are two lower cameras 21 and they are respectively fixed on both sides of the lower camera support seat 20. The lower camera support seat 20 fixes the support block 8;

[0048] An angle sensor is provided between the support rod 1 and the U-shaped tube 1 7, which is used to determine the relative angle between the support rod 1 and the U-shaped tube 1 7; an angle sensor is provided between the support rod 1 and the U-shaped tube 2 18, which is used to determine the relative angle between the support rod 1 and the U-shaped tube 2 18; a distance sensor receiving end is provided on the U-shaped tube 1 7, and a distance sensor transmitting end is provided on the U-shaped tube 2 8; the distance sensor is used to determine the distance between the U-shaped tube 1 7 and the U-shaped tube 2 8;

[0049] In the initial state, the liquid levels on both sides of the camera 21 can be just at the starting position on both sides of the camera for easy observation;

[0050] The two sides of the U-shaped tube 18 are fixedly connected through the lower connecting tube 29 to form a complete and sealed circuit in which liquid can flow. Under the effect of gravity and hydraulic pressure, the principle of a communicating vessel is formed, and the liquid levels on both sides are kept horizontal and flat.

[0051] The two sides of the U-shaped tube 18 are fixedly connected by the lower connecting tube 29. The height of the liquid level in the U-shaped tube 18 corresponds to the lower camera 21. Through the principle of communicating vessels, the liquid levels on both sides of the U-shaped tube 18 are in a level state. The lower camera 21 shoots and monitors the liquid levels on both sides of the inside of the U-shaped tube 18 on both sides, and compares the liquid level information on both sides. When the liquid levels on both sides are high and low under the viewing angle of the camera 21, the controller controls the first motor 24 to start and drive the lower camera fixing frame 19 to perform compensatory rotation, thereby driving the U-shaped tube 18 to rotate until the liquid levels observed on both sides of the lower camera 21 are at the same position of the two lower cameras 21, that is, the starting position. At this time, the liquid levels on both sides of the U-shaped tube 18 photographed by the lower camera 21 are aligned, so that the support block 8 remains horizontal, so that various relative angle distances can be accurately judged;

[0052] The two sides of the U-shaped tube 7 are fixedly connected by the upper connecting tube 28. According to the communicating vessel principle, the liquid levels on both sides of the U-shaped tube 7 are in a level state. The upper camera 32 shoots and monitors the liquid levels on both sides of the inside of the U-shaped tube 7 on both sides, and compares the liquid level information on both sides. When the liquid levels on both sides are one high and one low under the viewing angle of the camera 21, the controller controls the third motor 30 to start and drive the support plate 6 to rotate for compensation, thereby driving the U-shaped tube 7 to rotate until the liquid levels observed on both sides of the upper camera 32 are at the same position of the two upper cameras 32, i.e., the starting position. At this time, the liquid levels on both sides of the U-shaped tube 7 photographed by the upper camera 32 are aligned, so that the support plate 6 remains horizontal, so that various relative angle distances can be accurately judged;

[0053] There is air above the liquid level in the U-shaped tube 1 7 and the U-shaped tube 2 18, and the U-shaped tube 1 7 and the upper connecting tube 28 are sealed, and the U-shaped tube 2 18 and the lower connecting tube 29 are sealed to prevent air and liquid leakage. Under the combined effects of gravity and water flow, the liquid levels on both sides of the U-shaped tube 1 7 are level, and the liquid levels in the U-shaped tube 2 18 and the U-shaped tube 1 7 will not be affected by external factors, thereby achieving accurate water level measurement.

[0054] According to the angle measured by the angle sensor after the liquid levels in the upper U-shaped tube 1 7 and the lower U-shaped tube 2 18 are aligned as photographed by the upper camera 32 and the lower camera 21, the vertical distance, i.e., the height of the water surface, is determined. In a right triangle, when the length of one side and two angles are known, the lengths of the other two sides are calculated by the sine theorem. The expression formula of the sine theorem is: When the three angles of the triangle are A, B, and C (where ∠C=90°), and the three opposite sides are a, b, and c, respectively, then: When the length of the hypotenuse c is known, then:

[0055] a=c·sinA

[0056] b=c·sinB

[0057] When the angle measured by the angle sensor on the U-shaped tube 1 7, the angle measured on the U-shaped tube 2 18, and the distance measured by the distance sensor are known, the height of the water surface can be obtained by the sine theorem.

[0058] In this embodiment, the U-shaped tube 1 7 and the upper connecting tube 28 form a communicating vessel, and the U-shaped tube 2 18 and the lower connecting tube 29 form a communicating vessel. The principle of the communicating vessel can be explained by liquid pressure. If the same liquid is contained in the U-shaped glass tube, a small liquid sheet AB is assumed to be in the middle of the bottom of the communicating vessel. If the liquid is stationary, the pressure of the liquid in the left tube on the liquid sheet AB to the right must be equal to the pressure of the liquid in the right tube on the liquid sheet AB to the left. Because the communicating vessel contains the same liquid, the density of the left and right liquid columns is the same. According to the formula of liquid pressure P=ρgh, it can be seen that the pressure of the liquid columns on the liquid sheet AB on the two sides can be equal only when the heights of the liquid columns on the two sides are equal. Therefore, when the liquid is not flowing, the liquid levels in each container of the communicating vessel should remain level.

[0059] In this embodiment, the movable ring 3 and the fixed ring 4 are both made of floating materials, which can ensure that the movable ring 3 moves along the support rod 1, so that the upper U-shaped tube 7 and the like float on the water surface. The support rod 1 is held and the device is placed in the water. Since the movable ring 3 and the fixed ring 4 are both made of floating materials, under the action of buoyancy, the U-shaped tube 7, the upper connecting tube 28 and the upper camera 32 float on the water surface. Liquid is provided in the U-shaped tube 7, which is fixedly connected through the upper connecting tube 28. Due to the principle of communicating vessels, the liquid levels on both sides of the U-shaped tube 7 are aligned, and the upper camera 32 keeps working. The upper camera 32 is a waterproof camera, and the upper camera 32 shoots and monitors the liquid levels on both sides of the U-shaped tube 7. , and compare the liquid level information on both sides. When the liquid levels on both sides are not aligned, that is, the two liquid levels in the picture captured by the camera 21 are in a high and low state, the controller controls the third motor 30 to start and drive the support plate 6 to rotate, and then drive the U-shaped tube 1 7 to rotate, until the liquid levels observed on both sides of the lower camera 21 are at the same position of the two lower cameras 21, that is, the starting position. At this time, the liquid levels on both sides of the U-shaped tube 18 captured by the lower camera 21 are aligned, so that the support block 8 remains horizontal, so that various relative angle distances can be accurately judged. The third motor 30 rotates to drive the U-shaped tube 1 7 to rotate and adjust the liquid level in the U-shaped tube 1 7 to achieve liquid level compensation;

[0060] The support block 8 is at the bottom of the water. Due to the principle of communicating vessels, the liquid levels on both sides of the U-shaped tube 18 are aligned. The lower camera 21 continues to work, shoots and monitors the liquid levels on both sides of the U-shaped tube 18, and compares the liquid level information on both sides. When the liquid levels on both sides are not aligned, that is, when the two liquid levels are in a high and low state in the picture captured by the camera 21, the controller controls the first motor 24 to start and drive the lower camera fixing frame 19 to rotate, thereby driving the U-shaped tube 18 to rotate, until the liquid levels observed on both sides of the upper camera 32 are at the same position of the two upper cameras 32, that is, the starting position. At this time, the liquid levels on both sides of the U-shaped tube 1 7 captured by the upper camera 32 are aligned, so that the support plate 6 remains horizontal, so that various relative angle distances can be accurately judged, and the output shaft of the first motor 24 rotates to drive the U-shaped tube 18 to rotate and adjust the liquid level angle in the U-shaped tube 18 to achieve liquid level alignment compensation.

[0061] A limit strip 26 is fixed on the lower side of the support block 8, and a sleeve 27 is fixed in the center of the limit strip 26. Two ends of the sleeve 27 are respectively hinged to symmetrical connecting rods 9, and the other ends of the symmetrical connecting rods 9 are respectively hinged to two ends of one side of the side strip 10. A triangular block 11 is respectively fixed to the lower side of the side strip 10. A telescopic rod 15 is arranged in the sleeve 27, and a fixed rod 14 is fixed to the upper side of the base 13. Two ends of one side of the fixed rod 14 are respectively hinged to swing arms 17, and the other ends of the swing arms 17 are respectively hinged to the corresponding connecting rods 9.

[0062] The lower end of the spring 16 is fixed to the upper side of the fixing rod 14 , and the lower end of the spring 16 is fixedly connected to the lower side of the sleeve 27 . The spring 16 is looped around the telescopic rod 15 .

[0063] A group of evenly arranged ground-gripping spikes 12 are fixed to the lower inclined surface of each triangular block 11 and the lower side of the base 13 , respectively. The central axis of the ground-gripping spikes 12 fixed to the lower side of the triangular block 11 is perpendicular to the lower inclined surface of the triangular block 11 .

[0064] In this embodiment, the triangular block 11 is a weight block, which can facilitate the initial stability of the communicating vessel formed by the U-shaped tube 18 and the lower connecting tube 29.

[0065] In this embodiment, when the base 13 contacts the bottom of the water, the support shaft 25 and the support rod 1 may rotate relative to each other because the ground at the bottom of the water may be uneven, so that the base 13 completely contacts the bottom of the water. After the base 13 touches the bottom, the base 13 compresses the spring 16, and the base 13 drives the telescopic rod 15 to move along the sleeve 27. The base 13 drives the swing arm 17 to swing through the fixed rod 14, and the swing arm 17 drives the connecting rod 9 to swing. The connecting rod 9 drives the triangular block 11 to swing through the side strip 10. The base 13 and the triangular block 11 respectively drive the corresponding gripping nails 12 to contact the river bottom and insert into the bottom of the river channel to support the entire device.

[0066] The upper center of the lower camera fixing frame 19 is fixedly connected to the buoyancy block 22 .

[0067] In this embodiment, the buoyancy block 22 has buoyancy and can play an auxiliary role in adjusting the lower camera fixing frame 19 , and reduces the resistance of the water flow to the lower camera fixing frame 19 through the buoyancy, thereby reducing the pressure of the first motor 24 .

[0068] The upper end of the support rod 1 is provided with a thread, and the upper end of the support rod 1 is matched with a nut 2 through the thread, and the nut 2 prevents the movable sleeve 3 from being separated from the support rod 1.

[0069] A nut 2 is threadedly arranged on the upper end of the support rod 1 to prevent the movable sleeve ring 3 from being separated from the support rod 1 .

[0070] A controller is also provided, and the controller communicates with the upper camera 32 and the lower camera 21 through a transmission module, and the controller controls the first motor 24 and the third motor 30 .

[0071] When in use, the nut 2 is fixed to the upper end of the support rod 1 to prevent the movable sleeve 3 from detaching during use. The support rod 1 is held and the device is placed in water. Since the movable sleeve 3 and the fixed ring 4 are both made of floating materials, under the action of buoyancy, the U-shaped tube 1 7, the upper connecting tube 28 and the upper camera 32 float on the water surface. The upper camera 32 and the lower camera 21 are started by the controller to respectively monitor the liquid levels of the U-shaped tube 1 7 and the U-shaped tube 2 18. When the controller detects that the liquid level in the U-shaped tube 1 7 or the U-shaped tube 2 18 is in a high and low state in the picture taken by the camera 21, it will automatically control the third motor 30 or the first motor 24 to start, adjust the position of the U-shaped tube 1 7 or the U-shaped tube 2 18, until the liquid level observed on both sides of the upper camera 32 or the lower camera 21 is at the same position of the two upper cameras 32 or the lower camera 21, that is, the starting position. At this time, the liquid levels on both sides of the corresponding connectors photographed by the upper camera 32 or the lower camera 21 are aligned. When the base 13 contacts the bottom of the water, due to the water The ground at the bottom may be uneven, causing the support shaft 25 and the support rod 1 to rotate relative to each other, so that the base 13 is completely in contact with the bottom of the water. After the base 13 touches the bottom, the base 13 compresses the spring 16, and the base 13 drives the telescopic rod 15 to move along the sleeve 27. The base 13 drives the swing arm 17 to swing through the fixed rod 14, and the swing arm 17 drives the connecting rod 9 to swing. The connecting rod 9 drives the triangular block 11 to swing through the side strip 10. The base 13 and the triangular block 11 respectively drive the corresponding gripping nails 12 to contact the river bottom and insert into the bottom of the river channel to support the entire device. According to the angle measured by the angle sensor after the liquid levels in the upper U-shaped tube 1 7 and the lower U-shaped tube 2 18 are in an aligned state, and the distance between the U-shaped tube 1 7 and the U-shaped tube 2 18 measured by the distance sensor, the vertical distance, that is, the water surface height, is determined. When the angle measured by the angle sensor on the U-shaped tube 1 7, the angle measured on the U-shaped tube 2 18, and the distance measured by the distance sensor are known, the water surface height can be obtained by the sine theorem;

[0072] When the first motor 24 works to drive the lower camera fixing frame 19 to rotate, the buoyancy block 22 has buoyancy, which can play an auxiliary role in adjusting the lower camera fixing frame 19, and reduce the resistance of the water flow to the lower camera fixing frame 19 through buoyancy, thereby reducing the pressure of the first motor 24.

[0073] The present invention also provides a method for using a water level measuring device and method for geotechnical engineering investigation, comprising the following steps:

[0074] Step 1: Make sure that the nut 2 is fixed to the upper end of the support rod 1 to prevent the movable collar 3 from detaching during use;

[0075] Step 2: Hold the support rod 1 and place the device into the water. Since the movable ring 3 and the fixed ring 4 are both made of floating materials, under the action of buoyancy, the U-shaped tube 7, the upper connecting tube 28 and the upper camera 32 float on the water surface.

[0076] Step 3: Start the upper camera 32 and the lower camera 21 through the controller, and start monitoring the liquid levels of the U-shaped tube 1 7 and the U-shaped tube 2 18 respectively. When the controller detects that the liquid levels on both sides of the U-shaped tube 1 7 or the U-shaped tube 2 18 are in a high and low liquid level state in the corresponding upper camera 32 or lower camera 21 shooting, it will automatically control the third motor 30 or the first motor 24 to start, and adjust the position of the U-shaped tube 1 7 or the U-shaped rod 2 18 until the liquid levels on both sides of the image in the lower camera 21 are in an aligned state and the liquid levels on both sides of the image in the upper camera 32 are in an aligned state. At this time, the liquid levels observed on both sides of the upper camera 32 are at the same position of the upper camera 32, that is, the starting position, and the liquid levels observed on both sides of the lower camera 21 are at the same position of the lower camera 21, that is, the starting position, so that the support plate 6 and the support block 8 remain horizontal, so that various relative angle distances can be accurately judged. The angle sensor measures the angles of the U-shaped tube 1 7 and the U-shaped tube 2 18 respectively, and the distance sensor measures the distance between the U-shaped tube 1 7 and the U-shaped tube 2 18;

[0077] Step 4: According to the law of sine, calculate the vertical distance, i.e. the height of the water surface.

[0078] Among them, in the step 2, when the base 13 contacts the bottom of the water, the support shaft 25 and the support rod 1 may rotate relative to each other because the ground at the bottom of the water may be uneven, so that the base 13 completely contacts the bottom of the water. After the base 13 touches the bottom, the base 13 compresses the spring 16, and the base 13 drives the telescopic rod 15 to move along the sleeve 27. The base 13 drives the swing arm 17 to swing through the fixed rod 14, and the swing arm 17 drives the connecting rod 9 to swing. The connecting rod 9 drives the triangular block 11 to swing through the side strip 10. The base 13 and the triangular block 11 respectively drive the corresponding gripping nails 12 to contact the river bottom and insert into the bottom of the river channel to support the entire device.

[0079] Among them, in the step three, when the first motor 24 works to drive the lower camera fixing frame 19 to rotate, the buoyancy block 22 has buoyancy, which can play an auxiliary role in adjusting the lower camera fixing frame 19, and reduce the resistance of the water flow to the lower camera fixing frame 19 through buoyancy, thereby reducing the pressure of the first motor 24.

[0080] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water level measuring device for geotechnical engineering investigation, comprising a support rod (1), characterized in that: The support rod (1) is penetrated by a movable sleeve (3), the movable sleeve (3) can move along the support rod (1) and is used to adjust the position of the movable sleeve (3), the movable sleeve (3) is fixedly connected to symmetrical fixed rings (4), a fixed block (5) is fixed between the symmetrical fixed rings (4), the fixed block (5) is fixedly connected to a third motor (30), the output shaft of the third motor (30) is fixedly connected to one side of a support plate (6), and the other side of the support plate (6) is fixedly connected to a U-shaped tube ( 7), the upper ends of both sides of the U-shaped tube (7) are fixedly connected through an upper connecting tube (28), an upper camera (32) is arranged between the two sides of the U-shaped tube (7), the liquid level in the U-shaped tube (7) corresponds to the upper camera (32), the upper camera (32) is fixedly connected to an upper camera support seat (31), the upper cameras (32) are respectively fixed on both sides of the upper camera support seat (31), and the two sides of the U-shaped tube (7) correspond to one upper camera (32); The lower end of the support rod (1) is rotatably connected to a support shaft (25), the support shaft (25) is fixedly connected to a support block (8), the upper side of the support block (8) is fixedly connected to a motor support (23), the motor support (23) is fixed to a first motor (24), the output shaft of the first motor (24) is fixedly connected to a lower camera fixing frame (19), the other side center of the lower camera fixing frame (19) is fixedly connected to a U-shaped tube (18), the upper ends of both sides of the U-shaped tube (18) are fixedly connected through a lower connecting tube (29), and lower cameras (21) are respectively arranged on both sides of the lower connecting tube (29), and the number of the lower cameras (21) is two and they are respectively fixed to both sides of a lower camera supporting seat (20), and the lower camera supporting seat (20) is fixed to the support block (8); An angle sensor is provided between the support rod (1) and the U-shaped tube (7) for determining the relative angle between the support rod (1) and the U-shaped tube (7); an angle sensor is provided between the support rod (1) and the U-shaped tube (18) for determining the relative angle between the support rod (1) and the U-shaped tube (18); a distance sensor receiving end is provided on the U-shaped tube (7); a distance sensor transmitting end is provided on the U-shaped tube (8); the distance sensor is used to determine the distance between the U-shaped tube (7) and the U-shaped tube (8); The two sides of the U-shaped tube (18) are fixedly connected through the lower connecting tube (29). The height of the liquid level in the U-shaped tube (18) corresponds to the lower camera (21). Through the principle of communicating vessels, the liquid levels on both sides of the U-shaped tube (18) are in a level state. The lower camera (21) shoots and monitors the liquid levels on both sides of the inside of the U-shaped tube (18) on both sides, and compares the liquid level information on both sides. When the liquid levels on both sides are one high and one low under the viewing angle of the camera (21), the controller controls the first motor (24) to start and drive the lower camera fixing frame (19) to perform compensatory rotation, thereby driving the U-shaped tube (18) to rotate until the liquid levels observed on both sides of the lower camera (21) are at the same position of the two lower cameras (21), i.e., the starting position. At this time, the liquid levels on both sides of the U-shaped tube (18) photographed by the lower camera (21) are aligned, so that the support block (8) remains horizontal, so that various relative angle distances can be accurately judged; The two sides of the U-shaped tube (7) are fixedly connected by an upper connecting tube (28). Based on the communicating vessel principle, the liquid levels on the two sides of the U-shaped tube (7) are in a level state. The upper camera (32) shoots and monitors the liquid levels on the two sides of the interior of the U-shaped tube (7) and compares the liquid level information on the two sides. When the liquid levels on the two sides are one high and one low under the viewing angle of the camera (21), the controller controls the third motor (30) to start and drive the support plate (6) to rotate for compensation, thereby driving the U-shaped tube (7) to rotate until the liquid levels observed on the two sides of the upper camera (32) are at the same position of the two upper cameras (32), i.e., the starting position. At this time, the liquid levels on the two sides of the U-shaped tube (7) photographed by the upper camera (32) are aligned, so that the support plate (6) remains horizontal, so that various relative angle distances can be accurately judged; There is air above the liquid level in the U-shaped tube 1 (7) and the U-shaped tube 2 (18), and the U-shaped tube 1 (7) and the upper connecting tube (28) are sealed, and the U-shaped tube 2 (18) and the lower connecting tube (29) are sealed to prevent air and liquid leakage. Under the combined action of gravity and water flow, the liquid levels on both sides of the U-shaped tube 1 (7) are level, and the liquid levels in the U-shaped tube 2 (18) and the U-shaped tube 1 (7) are not affected by the outside, thereby achieving accurate water level measurement. According to the angle measured by the angle sensor after the liquid levels in the upper U-shaped tube 1 (7) and the lower U-shaped tube 2 (18) are in an aligned state, respectively photographed by the upper camera 32 and the lower camera 21, and the distance between the U-shaped tube 1 (7) and the U-shaped tube 2 (18) measured by the distance sensor, the vertical distance, i.e., the height of the water surface, is determined. In a right triangle, when the length of one side and two angles are known, the lengths of the other two sides are calculated by the sine theorem. The expression formula of the sine theorem is: When the three angles of the triangle are A, B, and C (where ∠C = 90°), and the three opposite sides of the angles are a, b, and c, respectively, then: When the length of the hypotenuse c is known, then: a=c·sinA b=c·sinB When the angle measured by the angle sensor on the U-shaped tube 1 (7), the angle measured on the U-shaped tube 2 (18) and the distance measured by the distance sensor are known, the height of the water surface can be obtained by the sine theorem.

2. The water level measuring device for geotechnical engineering survey according to claim 1 is characterized in that: A limit strip (26) is fixed on the lower side of the support block (8), a sleeve (27) is fixed at the center of the limit strip (26), two ends of the sleeve (27) are respectively hinged to symmetrical connecting rods (9), the other ends of the symmetrical connecting rods (9) are respectively hinged to two ends of one side of the side strip (10), a triangular block (11) is respectively fixed on the lower side of the side strip (10), a telescopic rod (15) is arranged in the sleeve (27), a fixed rod (14) is fixed at the lower end of the telescopic rod (15), the fixed rod (14) is fixed on the upper side of the base (13), two ends of one side of the fixed rod (14) are respectively hinged to swing arms (17), the other ends of the swing arms (17) are respectively hinged to the corresponding connecting rods (9).

3. The water level measuring device for geotechnical engineering survey according to claim 2 is characterized in that: The upper side of the fixing rod (14) fixes the lower end of the spring (16), the lower end of the spring (16) is fixedly connected to the lower side of the sleeve (27), and the spring (16) is looped around the telescopic rod (15).

4. The water level measuring device for geotechnical engineering survey according to claim 3 is characterized by: A group of evenly arranged ground-gripping spikes (12) are respectively fixed to the lower inclined surface of each triangular block (11) and the lower side of the base (13), and the central axis of the ground-gripping spikes (12) fixed to the lower side of the triangular block (11) is arranged perpendicular to the lower inclined surface of the triangular block (11).

5. The water level measuring device for geotechnical engineering survey according to claim 4 is characterized in that: The upper center of the lower camera fixing frame (19) is fixedly connected to the buoyancy block (22).

6. The water level measuring device and method for geotechnical engineering survey according to claim 5 is characterized by: The upper end of the support rod (1) is provided with a thread, and the upper end of the support rod (1) is engaged with a nut (2) through the thread, and the nut (2) prevents the movable sleeve (3) from detaching from the support rod (1).

7. The water level measuring device for geotechnical engineering survey according to claim 6 is characterized by: A controller is also provided, the controller communicates with the upper camera (32) and the lower camera (21) via a transmission module, and the controller controls the first motor (24) and the third motor (30).

8. The method for using the water level measuring device and method for geotechnical engineering investigation according to claim 7, characterized in that: The following steps are involved: Step 1: Ensure that the nut (2) is fixed to the upper end of the support rod (1) to prevent the movable collar (3) from being detached during use; Step 2: Hold the support rod (1) and place the device into water. Since the movable ring (3) and the fixed ring (4) are both made of floating materials, under the action of buoyancy, the U-shaped tube (7), the upper connecting tube (28) and the upper camera (32) float on the water surface. Step 3: The upper camera (32) and the lower camera (21) are started by the controller to monitor the liquid levels of the U-shaped tube (7) and the U-shaped tube (18) respectively. When the controller detects that the liquid levels on both sides of the U-shaped tube (7) or the U-shaped tube (18) are in a high and low liquid level state in the camera (21), it will automatically control the third motor (30) or the first motor (24) to start and adjust the position of the U-shaped tube (7) or the U-shaped rod (18) until the liquid levels on both sides of the image in the lower camera (21) are in an aligned state and the upper camera (21) is aligned. The liquid surfaces on both sides of the image formed in the head (32) are in an aligned state. At this time, the liquid surfaces observed by the two sides of the upper camera (32) are at the same position of the upper camera (32), i.e., the starting position, and the liquid surfaces observed by the two sides of the lower camera (21) are at the same position of the lower camera (21), i.e., the starting position, so that the support plate (6) and the support block (8) are kept horizontal, so that various relative angle distances can be accurately determined. The angle sensor measures the angles of the U-shaped tube 1 (7) and the U-shaped tube 2 (18), respectively, and the distance sensor measures the distance between the U-shaped tube 1 (7) and the U-shaped tube 2 (18); Step 4: According to the law of sine, calculate the vertical distance, i.e. the height of the water surface.

9. The method for using the water level measuring device and method for geotechnical engineering survey according to claim 8 is characterized by: In the second step, when the base (13) contacts the bottom of the water, the support shaft (25) and the support rod (1) may rotate relative to each other because the bottom of the water may be uneven, so that the base (13) completely contacts the bottom of the water. After the base (13) contacts the bottom, the base (13) compresses the spring (16), and the base (13) drives the telescopic rod (15) to move along the sleeve (27). The base (13) drives the swing arm (17) to swing through the fixed rod (14), and the swing arm (17) drives the connecting rod (9) to swing. The connecting rod (9) drives the triangular block (11) to swing through the side strip (10). The base (13) and the triangular block (11) respectively drive the corresponding ground-gripping nails (12) to contact the river bottom and insert into the bottom of the river channel, so as to support the entire device.

10. The method for using the water level measuring device and method for geotechnical engineering investigation according to claim 8, characterized in that: In the step three, when the first motor (24) works to drive the lower camera fixing frame (19) to rotate, the buoyancy block (22) has buoyancy and can play an auxiliary role in adjusting the lower camera fixing frame (19). The buoyancy reduces the resistance of the water flow to the lower camera fixing frame (19) and reduces the pressure of the first motor (24).

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