Laser distance measuring device

Abstract

The utility model relates to the technical field of distance measurement, and discloses a laser distance measurement device which comprises a pipeline, a pipeline detection robot is placed in the pipeline, an installation plate is fixedly installed on the upper surface of the pipeline detection robot, an installation mechanism is arranged on the installation plate, and the installation mechanism comprises two movable plates and two first fixed plates. A limiting groove is formed in the upper surface of the installation plate, the laser distance measuring sensor is installed on the pipeline detection robot, then the pipeline detection robot drives the laser distance measuring sensor to enter a pipeline, the minimum distance between the deformation position of the pipeline and the laser distance measuring sensor is measured, and the height of a vehicle body of the pipeline is superposed. The minimum inner diameter of the deformed pipeline can be accurately measured, and the problem that the inner diameter of the deformed pipeline can only be estimated in the CJJ 181-2012 specification of Technical Regulations for Detection and Assessment of Drainage Pipeline in cities and towns is solved, so that the measurement of the inner diameter of the pipeline with smaller pipe diameter by workers is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ranging technology, specifically a laser ranging device. Background Technology

[0002] Traditional inspection methods are inefficient and may cause further damage to pipelines. Therefore, the introduction of high-definition pipeline CCTV inspection technology is particularly important. Through CCTV technology, inspectors can monitor the inside of pipelines in real time without digging, clearly capturing the deformation of the pipeline's inner wall, including structural and functional problems such as deformation, undulation, and deposits. This method greatly improves inspection efficiency, shortens inspection time, and provides a scientific and accurate basis for subsequent maintenance and cleaning work. Pipeline deformation is a structural defect, and defect levels are classified as minor, moderate, severe, and major. Different defect levels are determined by the pipeline deformation rate. Deformation rate = (pipeline inner diameter - minimum inner diameter after deformation) ÷ pipeline inner diameter × 100%. While the pipeline inner diameter can be measured before installation, the minimum inner diameter after deformation is currently not quantifiable by domestic equipment manufacturers. For smaller diameter pipelines, manual measurement inside the pipe is also impossible; estimation is only possible through image scaling. Therefore, a precise numerical description of pipeline deformation cannot currently be provided; only the deformation rate can be estimated, corresponding to the defect level, for repair purposes. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a laser ranging device that solves the problem of measuring pipes with small diameters, where manual entry is not possible and measurements can only be estimated from image proportions. Therefore, for describing pipe deformation defects, precise numerical values ​​cannot currently be provided; only the deformation rate can be estimated, and a corresponding defect level can be assigned for repair.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser ranging device, comprising a pipe, wherein a pipe inspection robot is placed inside the pipe, and an mounting plate is fixedly installed on the upper surface of the pipe inspection robot;

[0007] The mounting mechanism is set on the mounting plate and includes two movable plates and two first fixed plates. A limit groove is formed on the upper surface of the mounting plate, and a laser rangefinder is placed inside the limit groove. Two first mounting slots are formed inside the mounting plate. The two movable plates are slidably installed inside the two first mounting slots respectively. The two first fixed plates are fixedly installed on the adjacent surfaces of the two movable plates respectively. The adjacent ends of the two first fixed plates slide through into the interior of the limit groove.

[0008] Preferably, the mounting mechanism further includes two second fixing plates and a U-shaped plate. The two second fixing plates are respectively fixedly installed on the left ends of the adjacent surfaces of the two movable plates. The left end of the limiting groove is open. The U-shaped plate is slidably installed at the left end opening of the limiting groove. The adjacent ends of the two second fixing plates are slidably inserted into the interior of the U-shaped plate.

[0009] Preferably, a bidirectional threaded rod is rotatably mounted on the inner wall of the first mounting groove on the front side, and the rear end of the bidirectional threaded rod rotatably penetrates into the interior of the first mounting groove on the rear side. Two movable plates are respectively threadedly connected to the front and rear ends of the bidirectional threaded rod. A rotating rod is threadedly mounted on the front surface of the mounting plate, and the rear end of the rotating rod is threaded into the interior of the first mounting groove on the front side.

[0010] Preferably, the front surface of the bidirectional threaded rod is provided with a rectangular groove, and a rectangular plate is slidably installed inside the rectangular groove, with the rectangular plate fixedly connected to the rotating rod.

[0011] Preferably, a second mounting groove is provided on the left surface of the U-shaped plate.

[0012] Preferably, a tie rod is fixedly installed inside the second mounting groove.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a laser ranging device with the following advantages:

[0015] 1. This laser ranging device, by installing a laser ranging sensor on a pipeline inspection robot, allows the robot to move the laser ranging sensor into the pipeline and measure the minimum distance between the deformed part of the pipeline and the laser ranging sensor. By adding the robot's own height, the minimum inner diameter of the deformed pipeline can be accurately measured. This solves the problem in the "Technical Specification for Inspection and Evaluation of Urban Drainage Pipelines" CJJ 181-2012 that only allows for estimation of the inner diameter of the deformed pipeline, thus facilitating the measurement of the inner diameter of pipelines with smaller diameters by staff. Attached Figure Description

[0016] Figure 1 This is a top view schematic diagram of the overall structure of the laser ranging device of this utility model;

[0017] Figure 2 This is a top view schematic diagram of the overall structure of the pipeline inspection robot of this utility model;

[0018] Figure 3 This is a top view of the internal cross-section of the mounting plate of this utility model;

[0019] Figure 4 This is a top view of the internal cross-section of the U-shaped plate of this utility model.

[0020] In the diagram: 1. Pipeline; 2. Pipeline inspection robot; 3. Tie rod; 4. Mounting plate; 5. Moving plate; 6. First fixed plate; 7. Limiting groove; 8. Laser rangefinder sensor; 9. First mounting groove; 10. Second fixed plate; 11. U-shaped plate; 12. Bidirectional threaded rod; 13. Rotating rod; 14. Rectangular groove; 15. Rectangular plate; 16. Second mounting groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a new technical solution: a laser ranging device, including a pipe 1, a pipe inspection robot 2 placed inside the pipe 1, and an installation plate 4 fixedly installed on the upper surface of the pipe inspection robot 2;

[0023] The mounting mechanism is mounted on the mounting plate 4 and includes two movable plates 5 and two first fixed plates 6. A limiting groove 7 is formed on the upper surface of the mounting plate 4, and a laser rangefinder 8 is placed inside the limiting groove 7. Two first mounting slots 9 are formed inside the mounting plate 4. The two movable plates 5 are slidably mounted inside the two first mounting slots 9 respectively. The two first fixed plates 6 are fixedly mounted on the adjacent surfaces of the two movable plates 5 respectively. The adjacent ends of the two first fixed plates 6 slide through into the interior of the limiting groove 7.

[0024] Furthermore, the installation mechanism also includes two second fixing plates 10 and a U-shaped plate 11. The two second fixing plates 10 are respectively fixedly installed on the left end of the adjacent surfaces of the two movable plates 5. The left end of the limiting groove 7 is open. The U-shaped plate 11 is slidably installed at the left end opening of the limiting groove 7. The adjacent ends of the two second fixing plates 10 are slidably inserted into the interior of the U-shaped plate 11.

[0025] Furthermore, by installing the laser rangefinder sensor 8 onto the pipeline inspection robot 2, and then having the pipeline inspection robot 2 drive the laser rangefinder sensor 8 into the interior of the pipeline 1, the minimum distance between the deformed part of the pipeline 1 and the laser rangefinder sensor 8 is measured. The robot 2 then adds its own height to accurately measure the minimum inner diameter of the pipeline 1 after deformation. This solves the problem in the "Technical Specification for Inspection and Evaluation of Urban Drainage Pipelines" CJJ 181-2012 that only allows for estimation of the inner diameter of the pipeline after deformation, thus facilitating the measurement of the inner diameter of pipelines with smaller diameters by the staff.

[0026] Furthermore, a bidirectional threaded rod 12 is rotatably installed on the inner wall of the first mounting groove 9 on the front side. The rear end of the bidirectional threaded rod 12 rotatably penetrates into the interior of the first mounting groove 9 on the rear side. Two movable plates 5 are respectively threaded to the front and rear ends of the bidirectional threaded rod 12. A rotating rod 13 is threadedly installed on the front surface of the mounting plate 4. The rear end of the rotating rod 13 is threaded into the interior of the first mounting groove 9 on the front side.

[0027] Furthermore, a rectangular groove 14 is provided on the front surface of the bidirectional threaded rod 12, and a rectangular plate 15 is slidably installed inside the rectangular groove 14. The rectangular plate 15 is fixedly connected to the rotating rod 13.

[0028] Furthermore, a second mounting groove 16 is provided on the left surface of the U-shaped plate 11.

[0029] Furthermore, a tie rod 3 is fixedly installed inside the second mounting slot 16.

[0030] Furthermore, when using this device, the laser rangefinder 8 is placed inside the limiting groove 7, and the U-shaped plate 11 is placed at the left end opening of the limiting groove 7. Then, the rectangular plate 15 on the rotating rod 13 is aligned with the rectangular groove 14, and the rectangular plate 15 is pushed into the rectangular groove 14. The rotating rod 13 is rotated, causing the rectangular plate 15 to drive the bidirectional threaded rod 12 to rotate. The rotation of the bidirectional threaded rod 12 drives the two movable plates 5 threadedly connected to it to move. The two movable plates 5 move closer to each other, and the first fixing plate 6 fixedly connected to the two movable plates 5 moves closer to each other. The two first fixing plates 6 enter the limiting groove 7 and reach the upper end of the laser rangefinder 8 to fix the laser rangefinder 8. Two second fixing plates 10 approach each other and enter the interior of the U-shaped plate 11 to fix the U-shaped plate 11. After fixing, the device can be placed inside the pipe to be inspected. The pipe inspection robot 2 and the laser rangefinder 8 are connected. After completion, the pipe inspection robot 2 is started, so that the pipe inspection robot 2 drives the laser rangefinder 8 into the interior of the pipe 1. Using the laser rangefinder 8, the minimum distance between the deformed part of the pipe 1 and the laser rangefinder 8 is measured. By superimposing its own vehicle height, the minimum inner diameter of the pipe 1 after deformation is accurately measured, which solves the problem that the inner diameter of the pipe after deformation can only be estimated in the "Technical Specification for Inspection and Evaluation of Urban Drainage Pipelines" CJJ181-2012.

[0031] Structural Description: Pipeline 1: This is the installation and inspection environment for the laser rangefinder device, and the pipeline inspection robot 2 moves and inspects inside it;

[0032] Pipeline inspection robot 2: used to move and inspect inside pipeline 1. Its upper surface is fixed with a mounting plate 4 for installing other components. Pipeline inspection robot 2 is existing technology, and its specific model is GD150.

[0033] Pull rod 3: Fixedly installed in the second mounting slot, used for manually removing and installing the U-shaped plate 11;

[0034] Mounting plate 4: Fixed to the pipeline inspection robot 2, providing a mounting surface for other installation mechanisms;

[0035] Movable plate 5: There are two of them, which are slidably installed in the first mounting slot on the mounting plate and are used to support and move the fixed plate 6 and the laser rangefinder 8;

[0036] First fixed plate 6: There are two of them, which are fixed on the movable plate to fix the laser range sensor and keep it in the correct position;

[0037] Limiting groove 7: It is formed on the mounting plate 4 and is used to place the laser rangefinder sensor 8 to ensure the stability of the sensor position;

[0038] Laser rangefinder 8: Placed in the limiting groove 7, it is used to measure parameters such as the distance to the inner wall of the pipe. Laser rangefinder 8 is existing technology, and its specific model is TF Mini LiDAR.

[0039] First mounting slot 9: It is formed inside the mounting plate 4 and is used to install the movable plate 5 so that it can slide.

[0040] Second fixed plate 10: fixed to the left end of the adjacent surface of the movable plate 5, and cooperates with the U-shaped plate 11 to fix the U-shaped plate 11.

[0041] U-shaped plate 11: Slidably installed at the left end opening of the limiting groove 7 to facilitate the insertion and removal of the laser range sensor 8 inside the limiting groove 7;

[0042] Bidirectional threaded rod 12: Rotatably installed in the first mounting groove 9 on the front and rear sides, and connected to the moving plate 5 by thread to realize the movement of the moving plate 5;

[0043] Rotating rod 13: It is threadedly installed on the front surface of the mounting plate 4, and its rear end thread passes through the first mounting groove 9 on the front side and is fixedly connected to the rectangular plate 15. It is used to manually drive the bidirectional threaded rod 12 to rotate.

[0044] Rectangular groove 14: It is formed on the front surface of the bidirectional threaded rod 12 and is used to slide and insert the rectangular plate 15 to transmit the power of the rotating rod 13.

[0045] Rectangular plate 15: Slidably installed in rectangular groove 14 and fixedly connected to rotating rod 13, used to transmit the rotational motion of rotating rod 13 to bidirectional threaded rod 12;

[0046] Second mounting slot 16: Opened on the left surface of U-shaped plate 11, used to mount tie rod 3.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser ranging device, comprising a pipe (1), wherein a pipe inspection robot (2) is placed inside the pipe (1), characterized in that: The pipeline inspection robot (2) has a mounting plate (4) fixedly installed on its upper surface; The mounting mechanism is set on the mounting plate (4). The mounting mechanism includes two movable plates (5) and two first fixed plates (6). A limiting groove (7) is opened on the upper surface of the mounting plate (4). A laser rangefinder (8) is placed inside the limiting groove (7). Two first mounting slots (9) are opened inside the mounting plate (4). The two movable plates (5) are slidably installed inside the two first mounting slots (9). The two first fixed plates (6) are fixedly installed on the adjacent surfaces of the two movable plates (5). The adjacent ends of the two first fixed plates (6) slide through into the interior of the limiting groove (7).

2. The laser ranging device according to claim 1, characterized in that: The installation mechanism also includes two second fixing plates (10) and a U-shaped plate (11). The two second fixing plates (10) are respectively fixedly installed on the left end of the adjacent surfaces of the two movable plates (5). The left end of the limiting groove (7) is open. The U-shaped plate (11) is slidably installed at the left end opening of the limiting groove (7). The adjacent ends of the two second fixing plates (10) are slidably inserted into the interior of the U-shaped plate (11).

3. The laser ranging device according to claim 1, characterized in that: A bidirectional threaded rod (12) is rotatably mounted on the inner wall of the first mounting groove (9) on the front side. The rear end of the bidirectional threaded rod (12) rotatably penetrates into the interior of the first mounting groove (9) on the rear side. Two movable plates (5) are threadedly connected to the front and rear ends of the bidirectional threaded rod (12) respectively. A rotating rod (13) is threadedly mounted on the front surface of the mounting plate (4). The rear end of the rotating rod (13) is threaded into the interior of the first mounting groove (9) on the front side.

4. The laser ranging device according to claim 3, characterized in that: The front surface of the bidirectional threaded rod (12) is provided with a rectangular groove (14), and a rectangular plate (15) is slidably installed inside the rectangular groove (14). The rectangular plate (15) is fixedly connected to the rotating rod (13).

5. A laser ranging device according to claim 2, characterized in that: The left surface of the U-shaped plate (11) is provided with a second mounting groove (16).

6. The laser ranging device according to claim 5, characterized in that: A tie rod (3) is fixedly installed inside the second mounting slot (16).

Images