A device for detecting karst caves in rotary excavated piles using laser radar and a method for using the device

Abstract

The present invention relates to the technical field of measuring equipment, and discloses a device for detecting karst caves in rotary-drilled piles using laser radar, including a positioning frame and a fixing frame, the bottoms of the two groups of fixing frames are plugged into the tops of the positioning frames, a driving motor is installed on the fixing frame on the rear side, a same rotating shaft is installed between the two fixing frames, the rear end of the rotating shaft is fixedly connected to the output shaft of the driving motor, a winding wheel is fixedly connected to the outside of the rotating shaft, and a pulling rope with scales is wound inside the winding wheel. The device for detecting karst caves in rotary-drilled piles using laser radar and its use method, when the device reaches the bottom of the hole, slowly lift the device, turn off the device and stop scanning, the laser radar sensor is selected from mature sensors currently on the market, the entire device is mature in technology, strong in operability, simple to make, convenient and quick to install, accurate in positioning, can provide accurate information for solving karst cave solutions, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring equipment, and in particular to an equipment using a laser radar to detect karst caves in a rotary-drilled pile and a method for using the equipment. Background Art

[0002] In the construction of rotary drilling piles, for the karst landform construction area, the landform is uneven and the geological conditions are complex. During the drilling process, it is necessary to timely grasp the situation in the hole, make accurate judgments on problems such as caves and cracks along the rocks, and make targeted treatment plans and measures.

[0003] Technical solutions of existing technology: In the actual construction process, if there is a risk of cave collapse in caves and rock fissures, it is usually forbidden to manually drill holes to collect information about the caves in the hole. The usual practice is to throw a steel ruler at the edge of the hole and use a flashlight to measure the size of the cave, which cannot obtain accurate information.

[0004] Disadvantages of the existing technology: The usual practice is to throw a steel ruler at the edge of the hole and use a flashlight to measure the size of the cave, but accurate information cannot be obtained. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a device for detecting karst caves in rotary bored piles using a laser radar and a method for using the device, which has the advantages of being able to more accurately obtain karst cave information in the hole, thereby solving the problem that traditional methods cannot accurately obtain karst cave information.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of obtaining more accurate information about the karst cave in the hole, the present invention provides the following technical solution: a device for detecting the karst cave in the rotary pile using a laser radar, comprising a positioning frame and a fixing frame, the bottoms of the two sets of fixing frames are plugged into the tops of the positioning frames, a driving motor is installed on the fixing frame on the rear side, a same rotating shaft is installed between the two fixing frames, and the rear end of the rotating shaft is fixedly connected to the output shaft of the driving motor;

[0009] The outside of the rotating shaft is fixedly connected to a winding wheel, the inside of the winding wheel is wound with a pulling rope with a scale, the bottom of the pulling rope is fixedly connected to two hooks, the bottoms of the two hooks are fixedly connected to the same base, the top of the base is installed with a laser radar sensor, and the front and rear sides of the base are fixedly connected to flashlights.

[0010] Preferably, the positioning frame is a circular frame, and evenly distributed fixing teeth are provided at the bottom of the frame.

[0011] Preferably, storage holes are provided on both left and right sides of the frame, and extension frames are slidably connected inside the storage holes, and the separated ends of the extension frames on both sides are located outside the frame.

[0012] Preferably, the front and rear sides of the top of the frame are provided with a plurality of symmetrically distributed positioning grooves, and the number of the positioning grooves is not less than six groups.

[0013] Preferably, the fixing frame includes a mounting member and two supporting legs, the two supporting legs are respectively hinged on the left and right sides of the mounting member, the bottoms of the two supporting legs respectively extend into the corresponding positioning grooves, the front and rear ends of the rotating shaft are respectively rotatably connected to the two mounting members, and the driving motor is fixedly connected to the mounting member on the rear side.

[0014] Preferably, the output end of the laser radar sensor should be connected to the input end signal of the external computer.

[0015] Preferably, the flashlight is connected to the base via a threaded structure, and the flashlight is equipped with a suitable rechargeable battery.

[0016] Another technical problem to be solved by the present invention is to provide a method for using a device for detecting a karst cave in a rotary excavated pile using a laser radar, comprising the following steps:

[0017] A. Fix the equipment: Place the positioning frame on the top of the hole. If the hole diameter is large, you can pull out the extension frame from the storage hole to increase the total length of the entire positioning frame, so that the positioning frame can be stably placed above the hole to be tested. Finally, install the two fixing frames on the positioning frame to complete the fixing of the entire equipment.

[0018] B Detection: Fix the flashlight at both ends of the base, then put the base into the hole. The drive motor can drive the rotating shaft to rotate, and then unfold the pulling rope on the winding wheel. As the length of the pulling rope increases, the base will drop, and the laser radar sensor on the base can detect the cave information;

[0019] C. Information acquisition: During the descent of the base, the flashlight can illuminate the hole, and the laser radar sensor can perform a 360° scan of the inside of the hole to obtain the contour image of the hole and transmit it to the computer device in real time;

[0020] D Information analysis: The peripheral computer equipment analyzes and processes the information obtained by the lidar sensor to obtain clear images and size information of the caves in the hole.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present invention provides a device for detecting karst caves in rotary excavated piles using laser radar and a method for using the device, which has the following beneficial effects:

[0023] 1. The device for detecting karst caves in rotary bored piles using laser radar and the method for using the device can illuminate the hole through a flashlight, and the laser radar sensor can scan the inside of the hole 360 ​​degrees to obtain the contour image of the hole and transmit it to the computer device in real time. The peripheral computer device analyzes and processes the information obtained by the laser radar sensor to obtain clear images and size information of the karst caves in the hole, so that the equipment can obtain the information of the karst caves in the hole more simply and accurately.

[0024] 2. The device for detecting karst caves in rotary bored piles using laser radar and its using method, when the hole is large, it is necessary to extend the length of the frame to ensure that the frame can be effectively placed above the hole. After the extension frame is pulled out, the total length of the entire frame can be increased, so that the device can adapt to the use of holes of different sizes.

[0025] 3. The equipment and method of using the laser radar to detect the karst cave in the rotary bored pile, when the device reaches the bottom of the hole, slowly lift the device, turn off the device and stop scanning. The laser radar sensor is selected from the mature sensors currently on the market. The whole equipment has mature technology, strong operability, simple production, convenient and quick installation, precise positioning, and can provide accurate information for solving the karst cave solution, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a device using a laser radar to detect karst caves in rotary-dug piles proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the connection structure between a fixed frame and a winding wheel in a device for detecting karst caves in rotary piles using a laser radar proposed by the present invention;

[0028] Figure 3 A top view of a positioning frame in a device for detecting karst caves in rotary-drilled piles using a laser radar proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the connection structure between a base and a flashlight in a device for detecting karst caves in rotary bored piles using a laser radar, as proposed by the present invention.

[0030] In the figure: 1. positioning frame; 2. fixing frame; 3. driving motor; 4. rotating shaft; 5. winding wheel; 6. pulling rope; 7. hook; 8. base; 9. lidar sensor; 10. flashlight; 11. frame; 12. fixing teeth; 13. storage hole; 14. extension frame; 15. positioning slot; 16. mounting piece; 17. supporting leg. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-4 , a device for detecting karst caves in rotary excavated piles using laser radar, comprising a positioning frame 1 and a fixing frame 2, the bottoms of the two fixing frames 2 are plugged into the top of the positioning frame 1, a driving motor 3 is installed on the fixing frame 2 on the rear side, a same rotating shaft 4 is installed between the two fixing frames 2, the rear end of the rotating shaft 4 is fixedly connected to the output shaft of the driving motor 3, the driving motor 3 is a low-speed motor, and after being powered on, the driving motor 3 can drive the rotating shaft 4 to rotate, providing power for the operation of the entire device;

[0033] A winding wheel 5 is fixedly connected to the outside of the rotating shaft 4, and a pulling rope 6 with a scale is wound inside the winding wheel 5. Two hooks 7 are fixedly connected to the bottom of the pulling rope 6, and the bottoms of the two hooks 7 are fixedly connected to the same base 8. A laser radar sensor 9 is installed on the top of the base 8. A flashlight 10 is fixedly connected to the front and rear sides of the base 8. The flashlight 10 is connected to the base 8 through a threaded structure, and the flashlight 10 is equipped with a suitable rechargeable battery. When the rotating shaft 4 rotates, the winding wheel 5 can be driven to rotate synchronously. When the winding wheel 5 rotates forward, the pulling rope 6 can be reeled in. When the reel 5 is reversed, the pulling rope 6 can be unfolded. After the base 8 is placed in the hole, the reel 5 is controlled to reverse. The pulling rope 6 is extended to make the base 8 descend in the hole. The flashlight 10 can illuminate the hole. The lidar sensor 9 performs a 360° scan of the inside of the hole, obtains the contour image of the hole, and transmits it to the computer device in real time. The external computer device analyzes and processes the information obtained by the lidar sensor 9, and can obtain a clear image and size information of the cave in the hole, so that the equipment can more simply and accurately obtain the information of the cave in the hole.

[0034] The positioning frame 1 can be placed above the hole to provide stable support for the entire device. The positioning frame 1 is a circular frame 11, and evenly distributed fixed teeth 12 are provided at the bottom of the frame 11. The frame 11 is in contact with the ground. The setting of the fixed teeth 12 can increase the stability of the connection between the frame 11 and the ground.

[0035] When the hole is large, it is necessary to extend the length of the frame 11 to ensure that the frame 11 can be effectively placed above the hole. Storage holes 13 are provided on the left and right sides of the frame 11. An extension frame 14 is slidably connected inside the storage hole 13. The separated ends of the extension frames 14 on both sides are located outside the frame 11. After the extension frames 14 are pulled out, the total length of the entire frame 11 can be increased, so that the device can adapt to the use of holes of different sizes.

[0036] After the fixing frame 2 is connected to the frame 11, the device can be used for detection. A plurality of symmetrically distributed positioning grooves 15 are provided on the front and rear sides of the top of the frame 11, and the number of the positioning grooves 15 is not less than six groups. The fixing frame 2 includes a mounting member 16 and two supporting legs 17. The two supporting legs 17 are respectively hinged on the left and right sides of the mounting member 16. The bottoms of the two supporting legs 17 extend into the corresponding positioning grooves 15 respectively. The front and rear ends of the rotating shaft 4 are respectively rotatably connected to the two mounting members 16. The driving motor 3 is fixedly connected to the mounting member 16 on the rear side. The height of the device can be adjusted by selecting different positioning grooves 15.

[0037] The laser radar sensor 9 can be used to detect the caves in the hole. The output end of the laser radar sensor 9 should be connected to the input end signal of the external computer. The laser radar sensor 9 can obtain the contour image of the hole and transmit it to the computer terminal in real time, so that the operator outside the hole can accurately locate the size and position of the cave in the hole. The obtained information can be processed by the computer.

[0038] Another technical problem to be solved by the present invention is to provide a method for using a device for detecting a karst cave in a rotary excavated pile using a laser radar, comprising the following steps:

[0039] A. Fixing the equipment: Place the positioning frame 1 on the top of the hole. If the hole has a large diameter, the extension frame 14 can be pulled out from the storage hole 13 to increase the total length of the entire positioning frame 1, so that the positioning frame 1 can be stably placed on the top of the hole to be tested. Finally, install the two fixing frames 2 on the positioning frame 1 to complete the fixing of the entire equipment.

[0040] B Detection: Fix the flashlight 10 at both ends of the base 8, then put the base 8 into the hole, the driving motor 3 can drive the rotating shaft 4 to rotate, and then unfold the pulling rope 6 on the winding wheel 5, and as the length of the pulling rope 6 increases, the base 8 will drop, and the laser radar sensor 9 on the base 8 can detect the cave information;

[0041] C. Information acquisition: During the process of the base 8 descending, the flashlight 10 can illuminate the inside of the hole, and the laser radar sensor 9 can perform a 360° scan of the inside of the hole to obtain the contour image of the hole and transmit it to the computer device in real time;

[0042] D. Information analysis: The peripheral computer device analyzes and processes the information acquired by the laser radar sensor 9 to obtain clear images and size information of the caves in the hole.

[0043] When the device reaches the bottom of the hole, slowly lift the device, turn off the equipment and stop scanning. The laser radar sensor 9 selects mature sensors currently on the market. The entire equipment has mature technology, strong operability, simple production, convenient and quick installation, and precise positioning. It can provide accurate information for solving cave solutions, which is safe and reliable.

[0044] The beneficial effects of the present invention are as follows: the driving motor 3 uses a low-speed motor. After power is turned on, the driving motor 3 can drive the rotating shaft 4 to rotate, providing power for the operation of the entire equipment. When the rotating shaft 4 rotates, it can drive the winding wheel 5 to rotate synchronously. When the winding wheel 5 rotates forward, the pulling rope 6 can be reeled in, and when the winding wheel 5 reverses, the pulling rope 6 can be unfolded. After the base 8 is placed in the hole, the winding wheel 5 is controlled to reverse, and the pulling rope 6 is extended to make the base 8 descend in the hole. The flashlight 10 can illuminate the hole. The laser radar sensor 9 performs a 360° scan on the inside of the hole, obtains the contour image inside the hole, and transmits it to the computer device in real time. The external computer device analyzes and processes the information obtained by the laser radar sensor 9, and can obtain a clear image and size information of the cave in the hole, so that the equipment can more simply and accurately obtain the information of the cave in the hole.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting karst caves in rotary bored piles using laser radar, comprising a positioning frame (1) and a fixing frame (2), characterized in that: The bottoms of the two sets of fixing frames (2) are plugged into the top of the positioning frame (1) placed above the hole; a driving motor (3) is installed on the fixing frame (2) at the rear side; a common rotating shaft (4) is installed between the two fixing frames (2); and the rear end of the rotating shaft (4) is fixedly connected to the output shaft of the driving motor (3); The outside of the rotating shaft (4) is fixedly connected to a winding wheel (5), the inside of the winding wheel (5) is wound with a pulling rope (6) with scales, the bottom of the pulling rope (6) is fixedly connected to two hooks (7), the bottoms of the two hooks (7) are fixedly connected to the same base (8), the top of the base (8) is equipped with a laser radar sensor (9), and the front and rear sides of the base (8) are fixedly connected to flashlights (10); The positioning frame (1) is a circular frame (11), and the bottom of the frame (11) is provided with evenly distributed fixed teeth (12); The frame (11) has storage holes (13) on both left and right sides, and the interior of the storage holes (13) is slidably connected to an extension frame (14), and the separated ends of the extension frames (14) on both sides are located outside the frame (11); A plurality of symmetrically distributed positioning grooves (15) are provided on the front and rear sides of the top of the frame (11); The fixing frame (2) comprises a mounting member (16) and two supporting legs (17), the two supporting legs (17) being hinged to the left and right sides of the mounting member (16), respectively, the bottoms of the two supporting legs (17) respectively extending into corresponding positioning slots (15), and the front and rear ends of the rotating shaft (4) are respectively rotatably connected to the two mounting members (16).

2. The device for detecting karst caves in rotary-drilled piles using laser radar according to claim 1, characterized in that: The number of the positioning grooves (15) is no less than six groups.

3. The device for detecting karst caves in rotary-drilled piles using laser radar according to claim 2, characterized in that: The driving motor (3) is fixedly connected to a mounting member (16) disposed on the rear side of the rotating shaft (4).

4. The device for detecting karst caves in rotary-drilled piles using laser radar according to claim 1, characterized in that: The output end of the laser radar sensor (9) should be connected to the input end signal of the external computer.

5. The device for detecting karst caves in rotary-drilled piles using laser radar according to claim 1, characterized in that: The flashlight (10) is connected to the base (8) via a threaded structure, and the flashlight (10) is equipped with a suitable rechargeable battery.

6. A method for using a device for detecting karst caves in rotary-drilled piles using a laser radar, comprising the device for detecting karst caves in rotary-drilled piles using a laser radar as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: A. Fixing the equipment: Place the positioning frame (1) above the hole. If the hole has a large diameter, pull out the extension frame (14) from the storage hole (13) to increase the total length of the entire positioning frame (1), so that the positioning frame (1) can be stably placed above the hole to be inspected. Finally, install the two fixing frames (2) on the positioning frame (1), thus completing the fixing of the entire equipment. B. Detection: fix the flashlight (10) at both ends of the base (8), then place the base (8) into the hole, drive the motor (3) to drive the rotating shaft (4) to rotate, and then unfold the pulling rope (6) on the winding wheel (5), and as the length of the pulling rope (6) increases, the base (8) will drop, and the laser radar sensor (9) on the base (8) will detect the cave information; C. Information acquisition: During the process of the base (8) descending, the flashlight (10) illuminates the inside of the hole, and the laser radar sensor (9) performs a 360° scan of the inside of the hole to obtain an image of the contour of the hole, and transmits it to the computer device in real time; D. Information analysis: The peripheral computer device analyzes and processes the information acquired by the laser radar sensor (9) to obtain clear images and size information of the cave inside the hole.

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