A three-dimensional laser target device suitable for use under a wharf and capable of centering and levelling

Abstract

This utility model relates to the field of three-dimensional laser scanning measurement technology, and provides a three-dimensional laser target device suitable for use below a wharf and capable of centering and leveling. It includes a main body and a centering and leveling part. The main body comprises a cube, a prism, a disk, at least three butterfly bolts, and a U-shaped plate. The prism is embedded at the center of any side surface of the cube, with its center coinciding with the center of the cube's surface. The disk has a diameter larger than the side length of the cube and is detachably connected to the cube. The U-shaped plate is fixedly connected to the disk. The centering and leveling part is detachably connected to the U-shaped plate and includes a base, a circular spirit level, a buckle, a spring, and rivets. This utility model has a simple structure, quick installation, and high reusability. It can work stably for a long time under conditions of large tidal range, limited visibility, and insufficient lighting, significantly improving measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of three-dimensional laser scanning measurement technology, and in particular to a three-dimensional laser target device that can provide high-precision reference points in environments such as tidal range, limited visibility space, and insufficient lighting below a wharf. Background Technology

[0002] During the upgrading and renovation of old wharves, to avoid collisions between new and old piles, it is necessary to accurately determine the three-dimensional coordinates of the existing piles beneath the wharf. Three-dimensional laser scanning technology is widely used due to its high efficiency and high density, but this technology requires the deployment of a large number of targets as coordinate transformation benchmarks. Existing technologies generally use reflective sheets or spherical targets, which have the following drawbacks:

[0003] 1) Due to the ebb and flow of tides, the target is easily washed away or submerged;

[0004] 2) The space below the dock is narrow and poorly lit, making it difficult to identify the reflective material;

[0005] 3) Spherical targets are prone to rolling, making it impossible to ensure a constant center position;

[0006] 4) It is difficult to level accurately after installation, resulting in large coordinate errors.

[0007] Therefore, there is an urgent need for a laser target device that can be fixed for a long time, leveled quickly, and still provide a precise reference in harsh environments. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a three-dimensional laser target device that is suitable for use below a wharf and can be centered and leveled. It has a simple structure, quick installation, high reusability, and can work stably for a long time under conditions of large tidal range, limited visible space, and insufficient lighting, and significantly improves measurement accuracy.

[0009] The technical solution adopted by this utility model to solve the technical problem is:

[0010] This invention provides a three-dimensional laser target device suitable for use below a wharf and capable of centering and leveling, comprising: a main body and a centering and leveling part.

[0011] The main body comprises: a cube, a prism, a disk, at least three wing bolts, and a U-shaped plate. The prism is embedded in the center of any side surface of the cube, with its center coinciding with the center of the cube surface. The diameter of the disk is larger than the side length of the cube. The disk is detachably connected to the cube. The wing bolts are threaded to the disk at equal intervals along the circumferential direction. The U-shaped plate is fixedly connected to the disk.

[0012] The centering and leveling section is detachably connected to the U-shaped plate and includes: a base, a circular level bubble, a buckle, a spring, and rivets. The base has four square-shaped grooves with a circular center for rotating the centering and leveling section. Each side of the buckle has a protrusion. By pressing and rotating the sides of the buckle, the protrusions are inserted into the grooves of the base for centering and leveling. The spring is connected to the protrusions on the inner sides of the buckle for rotating the centering and leveling section. The rivets are used to connect the base, the buckle, and the circular level bubble.

[0013] Furthermore, the diameter of the disk is twice the side length of the cube.

[0014] Furthermore, the number of the butterfly bolts is three, and they are distributed in an equilateral triangle at a distance of 2cm from the edge of the disk.

[0015] Furthermore, the prism is a general-purpose surveying prism for total stations, and it is connected to the cube via a tail thread.

[0016] Furthermore, the main body and the centering and leveling part are connected by drilling holes and fixing bolts on the side of the U-shaped plate.

[0017] Furthermore, the wing bolts cooperate with the pre-embedded expansion bolts to fix the disc to the surface of the dock.

[0018] The advantages and positive effects of this utility model are:

[0019] 1) The method of embedding a prism in the middle of the surface of the cube in this utility model avoids the defects of the prism-free acquisition method (that is, when using a total station for long-distance acquisition, the laser will appear as an ellipse on the target object instead of a red dot), and improves the positional accuracy of the target measurement.

[0020] 2) This utility model overcomes the disadvantage that the target is easy to move or fall off with the rise and fall of the tide, saving a lot of time, manpower and material resources, and achieving the purpose of long-term fixation.

[0021] 3) This utility model achieves the purpose of accurately measuring the center position of a cube through centering and leveling. Attached Figure Description

[0022] Figure 1 This is a front view schematic diagram of the device of this utility model;

[0023] Figure 2 This is a side view of the device of this utility model;

[0024] Figure 3 This is a top view of the device of this utility model;

[0025] Figure 4 This is a side view of the prism of this utility model. Detailed Implementation

[0026] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0027] A three-dimensional laser target device suitable for use under a dock and capable of centering and leveling includes: a main body and a centering and leveling part.

[0028] The main body includes: a cube 1, a prism 2, a disk 3, at least three wing bolts 5, and a U-shaped plate 6.

[0029] The cube 1 serves as the carrier of the prism 2. Its surface, which connects to the disk 3, has four threaded holes for connecting the disk 3. The cube 1 and the disk 3 are connected by fixing bolts 4. A circular hole is located at the center of any surface of the cube 1 perpendicular to the connection surface with the disk 3, for embedding the prism 2.

[0030] The prism 2 is a general-purpose surveying prism commonly used in total stations during surveying. It is connected to the cube via a tail thread, and the center of the prism 2 is aligned with the center of the cube's surface.

[0031] The diameter of disk 3 is larger than the side length of the cube. Two centimeters from the edge, there are three threaded drill holes arranged in an equilateral triangle for connecting the wing bolts 5. There are four threaded drill holes arranged in a square in the middle of disk 3 for connecting the cube.

[0032] The butterfly bolt 5 has a butterfly-shaped head for centering and leveling. It is connected to the disc 3 by threads and nuts, and is fixed to the expansion bolts pre-embedded on the side or below the dock.

[0033] The U-shaped plate 6 is welded to the disc 3. The U-shaped plate 6 has three holes on its side for connecting to the centering and leveling section.

[0034] The centering and leveling section is detachably connected to the U-shaped plate 6 and includes: a base 7, a circular level bubble 8, a buckle 9, a spring 12, and a rivet 10.

[0035] The base 7 has four grooves arranged in a square. The center groove is circular and used for rotation.

[0036] The circular level bubble 8 is used to indicate the horizontal state.

[0037] The buckle 9 has a protrusion 11 on each side. By pressing the two sides of the buckle 9 and rotating it, the protrusion 11 is inserted into the groove of the base 7 for centering and leveling.

[0038] Spring 12 is connected to the protrusions 11 on the inner sides of the buckle 9 and is used for the rotation of the centering and leveling part;

[0039] Rivet 10 is used to connect base 7, buckle 9 and circular bubble level 8.

[0040] The centering and leveling section is fixedly connected to the U-shaped plate 6 via the buckle 9, so that the centered state of the circular level bubble 8 indicates that the prism 2 is in a horizontal and centered position.

[0041] The cube, disc 3, wing bolt 5, fixing bolt 4, U-shaped plate 6, base of the centering and leveling part 7, spring 12, and rivet 10 are all made of stainless steel; buckle 9 and round bubble shell can be made of plastic steel.

[0042] Working principle of this utility model:

[0043] After all parts are connected, first mark the positions of the three wing bolts 5 below or on the side of the dock, drill holes at the marked positions using an electric drill, and insert the expansion bolts into the drilled holes. Then screw the wing bolts 5 into the expansion bolts. Rotate the bubble to a horizontal position by pressing the buckle 9. Adjust the three wing bolts 5 to center the bubble. Set up the measuring instrument on the control point and center and level it. After orientation, aim at the prism 2 on the target to measure and accurately measure the position of the target. After the three-dimensional scanning measurement is completed, the target can be disassembled and reused.

[0044] The steps for using this utility model are as follows:

[0045] S1. Pretreatment: All components are treated for corrosion and moisture protection.

[0046] S2. Assembly:

[0047] The cube and disk 3 are connected and fixed together by 4 bolts.

[0048] The centering and leveling part is connected and fixed to the U-shaped plate 6 by rivets 10, nuts and fixing bolts 4.

[0049] Connect the three wing bolts 5 each through the threads inside the two nuts and the three discs 3 holes.

[0050] S3. Site Selection and Drilling: Based on the survey area and actual conditions, determine the target location. The following example is taken below the wharf. At the preset location, face prism 2 towards the total station. Mark the drilling positions through the holes in disc 3. Drill 3 holes with an electric drill. The drill bit diameter is about 2mm larger than the diameter of the wing bolt 5 for installing expansion bolts.

[0051] S4. Pre-embedding of expansion bolts: Drive the expansion bolts into the drilled holes.

[0052] S5. Preliminary horizontal adjustment: Rotate the centering and leveling part to the horizontal direction using the combination of buckle 9 and groove, so that the circular level bubble 8 faces directly downwards for easy observation.

[0053] S6. Fixing and fine leveling: Screw the wing bolt 5 into the expansion bolt, and adjust the circular level bubble 8 by rotating the wing bolt 5 top wing protrusion to center it, thereby ensuring that the disc 3 is in a horizontal state.

[0054] S7. Measurement: Set up the total station at the control point, level, center and orient it, aim at prism 2 on the target device to measure and determine the target position.

[0055] S8. Disassembly: After the measurement is completed, the target can be disassembled and reused.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A three-dimensional laser target device suitable for use below a wharf and capable of centering and leveling, characterized in that, include: The main body includes: Cube (1) Prism (2), the prism (2) is embedded in the center of any side surface of the cube and its center coincides with the center of the surface of the cube (1). A disk (3) has a diameter larger than the side length of the cube (1), and the disk (3) is detachably connected to the cube (1). At least three wing bolts (5) are threaded to the disk (3) at equal intervals along the circumferential direction; The U-shaped plate (6) is fixedly connected to the disc (3); as well as The centering and leveling section is detachably connected to the U-shaped plate and includes: The base (7) has four grooves arranged in a square shape with a circular center for rotating the centering and leveling part; Circular level bubble (8). The buckle (9) has a protrusion (11) on each side. By pressing the two sides of the buckle (9) and rotating it, the protrusion (11) is embedded into the groove of the base (7) for centering and leveling. The spring (12) is connected to the protrusions (11) on both sides of the buckle (9) for rotating the centering and leveling part; Rivets (10) are used to connect the base (7), the buckle (9), and the circular level bubble (8).

2. The three-dimensional laser target device according to claim 1, characterized in that: The diameter of the disk (3) is twice the side length of the cube.

3. The three-dimensional laser target device according to claim 2, characterized in that: The number of the butterfly bolts (5) is three, and they are distributed in an equilateral triangle at a distance of 2cm from the edge of the disk (3).

4. The three-dimensional laser target device according to claim 3, characterized in that: The prism (2) is a general-purpose surveying prism for total stations, and is connected to the cube threaded through the tail thread.

5. The three-dimensional laser target device according to claim 4, characterized in that: The main body and the centering and leveling part are connected by drilling holes and fixing bolts on the side of the U-shaped plate (6).

6. The three-dimensional laser target device according to claim 5, characterized in that: The wing bolt (5) is used in conjunction with the pre-embedded expansion bolt to fix the disc (3) to the surface of the dock.

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