Three-dimensional laser scanning target

Abstract

The utility model discloses a three-dimensional laser scanning target, which relates to the technical field of laser scanning measurement, is applied to mine laneways with surrounding rocks provided with drill holes, and comprises an identification plate and a support column, and one end face of the identification plate covers the opening part of the drill hole; one end of the supporting column vertically penetrates through the middles of the two end faces of the recognition plate and extends into the drill hole, and a through hole coaxial with the supporting column is formed in the other end of the supporting column. In the using process, the end face, away from the drill hole, of the recognition plate, the end, away from the drill hole, of the supporting column and the through hole are different in structure, so that results obtained after three-dimensional scanning are different, and the position relation of the recognition plate, the supporting column and the through hole is fixed. When the scanning direction is not perpendicular to the end face, away from the drilled hole, of the recognition plate and has a certain inclination angle, the center of the target can be determined through the scanning results of the three parts and the position relation, and the precision of three-dimensional laser scanning is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser scanning measurement, in particular to a three-dimensional laser scanning target. Background Art

[0002] In the process of safe production and management, it provides the necessary basic data and results for the planning, design, exploration, construction, production and operation management of mines, especially for the implementation of large-scale through-hole projects and accurate mapping of goaf areas. With the expansion of the scale and complexity of mine development, 3D laser scanning measurement has developed rapidly in mine shaft and tunnel measurement with its efficient, accurate and intuitive technical advantages.

[0003] At present, there are two main types of targets used in 3D laser scanning, namely spherical targets and plane targets. Both are equipped with a reflection area and an absorption area around the reflection area. The 3D laser scanner scans the laser reflected by the reflection area and then determines the center of the target through the target recognition software. Among them, the spherical target can be scanned from any direction to get the center, so it is very suitable for internal and external scanning of irregular objects with corners, and there is no problem of inclination.

[0004] For a flat target, if the target plane is placed at a certain inclination angle to the scanning direction instead of scanning vertically, the target recognition software may not be able to find the center of the target, making the automatic recognition of the target center invalid. Utility Model Content

[0005] The main purpose of the utility model is to provide a three-dimensional laser scanning target, aiming to solve or partially solve the above-mentioned technical problems.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A three-dimensional laser scanning target, used in mine tunnels with drill holes in the surrounding rock, comprising:

[0008] an identification plate, one end surface of which covers the borehole opening;

[0009] A support column, one end of which vertically penetrates the middle of the two end surfaces of the identification plate and extends into the drilled hole, and the other end of the support column is provided with a through hole coaxial with the support column.

[0010] As a further improvement of the utility model, the identification plate is provided with an adhesive layer, a support layer and a reflective layer stacked axially along the support column, the adhesive layer is arranged on a side of the support layer adjacent to the drill hole, and the reflective layer is arranged on a side of the support layer away from the drill hole.

[0011] As a further improvement of the present invention, the three-dimensional laser scanning target also includes at least one limiting rod arranged in the supporting layer, the axis of each limiting rod is parallel to the reflective layer, and one end of each limiting rod is connected to the side wall of the supporting column.

[0012] As a further improvement of the utility model, fillers are provided in the space between the surrounding rock at the borehole mouth and the bonding layer on a side away from the reflective layer, as well as the interior of the borehole.

[0013] As a further improvement of the present invention, the side wall of the support column is provided with an external thread, and the external thread is provided on a side of the adhesive layer away from the reflective layer.

[0014] As a further improvement of the present invention, the side wall of the support column is provided with a notch connected to one end of the through hole adjacent to the drill hole, and the notch is provided on a side of the reflective layer away from the adhesive layer.

[0015] The technical solution provided by the utility model may have the following beneficial effects:

[0016] During use of the utility model, the identification plate is installed at the control point on the top of the underground shaft with the support column. The end face of the identification plate away from the borehole, the end of the support column away from the borehole, and the through hole have different structures, which makes the results after three-dimensional scanning different, and the positional relationship of the three is fixed. When the scanning direction is not perpendicular to the end face of the identification plate away from the borehole and has a certain inclination angle, the scanning results and positional relationship of the three can be used to determine the target center, further improving the accuracy of three-dimensional laser scanning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0018] Figure 1 It is a side cross-sectional schematic diagram of a three-dimensional laser scanning target;

[0019] Figure 2 It is a bottom view of a 3D laser scanner target;

[0020] Reference numerals:

[0021] 100. Drilling;

[0022] 1. Identification plate; 11. Adhesive layer; 12. Support layer; 13. Reflective layer; 2. Support column; 21. Through hole; 22. External thread; 23. Slot; 3. Limit rod; 4. Filler. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. In the absence of conflict, the embodiments and features in the embodiments of the utility model can be combined with each other. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] Figure 1 An embodiment of a three-dimensional laser scanning target of the utility model is shown, see Figure 1 In this embodiment, the three-dimensional laser scanning target is applied to a mine tunnel with a drill hole 100 in the surrounding rock, and includes: an identification plate 1 and a support column 2;

[0025] Among them, see Figure 1 , one end face of the identification plate 1 covers the mouth of the borehole 100, one end of the support column 2 vertically penetrates the middle of the two end faces of the identification plate 1 and extends into the borehole 100, and the other end of the support column 2 is provided with a through hole 21 coaxial therewith. There are differences in the structures of the end face of the identification plate 1 away from the borehole 100, the end of the support column 2 away from the borehole 100, and the through hole 21, which makes the results after three-dimensional scanning different, and the positional relationship of the three is fixed. When the scanning direction is not perpendicular to the end face of the identification plate 1 away from the borehole 100 and has a certain inclination angle, the scanning results and positional relationship of the three can be used to determine the center of the target, further improving the accuracy of three-dimensional laser scanning. At the same time, the identification plate 1 is installed on the borehole 100 of the control point with the support column 2, so that there is no need to hang the target at the control point, or install the target on the walls on both sides of the control point, and the measurement can be directly performed by the three-dimensional laser scanner.

[0026] Further, see Figure 1 The identification plate 1 is provided with an adhesive layer 11, a supporting layer 12 and a reflective layer 13 stacked axially along the supporting column 2. The adhesive layer 11 is arranged on a side of the supporting layer 12 adjacent to the borehole 100, and the reflective layer 13 is arranged on a side of the supporting layer 12 away from the borehole 100. The adhesive layer 11 is used to bond the identification plate 1 to the radial surrounding rock, the reflective layer 13 is used to reflect the laser generated by the three-dimensional laser scanner, and the supporting layer 12 is used to support the reflective layer 13.

[0027] Optionally, the axis of the support column 2 is perpendicular to the end surface of the reflective layer 13 away from the adhesive layer 11, with a tolerance of 5°, to ensure that the measurement deviation of the target center does not exceed 1 mm.

[0028] Further, see Figure 1The three-dimensional laser scanning target also includes a limiting rod 3. At least one limiting rod 3 is arranged in the supporting layer 12. The axis of each limiting rod 3 is parallel to the reflective layer 13. One end of each limiting rod 3 is connected to the side wall of the supporting column 2. The limiting rod 3 is used to limit the identification plate 1 so that the positional relationship between the end face of the identification plate 1 away from the drilling hole 100 and the end of the supporting column 2 away from the drilling hole 100 is a determined relationship.

[0029] Optionally, two support rods are provided, and are folded in half through a copper wire, spirally wound and sleeved on the side wall of the support column 2.

[0030] Further, see Figure 1 The space between the surrounding rock at the mouth of the borehole 100 and the bonding layer 11 on the side away from the reflective layer 13, as well as the inside of the borehole 100 are provided with fillers 4. The surrounding rock at the mouth of the borehole 100 is provided with fillers 4 to level the surrounding rock at the mouth of the borehole 100 so that the end face of the reflective plate away from the borehole 100 is perpendicular to the axis of the support column 2. The fillers 4 are provided inside the borehole 100 to make the borehole 100 hug the side wall of the support column 2 to prevent the support column 2 from detaching from the surrounding rock of the shaft.

[0031] Optionally, the filler 4 is made of cement gel material, which is convenient for leveling operation and injection into the borehole 100 before solidification. The cement gel material at the mouth of the borehole 100 is not easy to deform after solidification. After the cement gel material in the borehole 100 solidifies, it can cooperate with the borehole 100 to hug the side wall of the support column 2 to fix the support column 2 to the borehole 100.

[0032] Further, see Figure 1 The side wall of the support column 2 is provided with an external thread 22, and the external thread 22 is arranged on the side of the adhesive layer 11 away from the reflective layer 13. The external thread 22 is used to increase the contact area between the side wall of the support column 2 and the filler 4, thereby increasing the friction between the support column 2 and the filler 4, and further improving the stability of the support column 2 after connecting the drill hole 100.

[0033] Further, see Figure 1 The side wall of the support column 2 is provided with a notch 23 connected to the end of the through hole 21 adjacent to the drilled hole 100. The notch 23 is provided on the side of the reflective layer 13 away from the adhesive layer 11. The notch 23 is used to make the through hole 21 conductive, so as to facilitate the connection of a thin wire at the end of the support column 2 away from the drilled hole 100.

[0034] In this embodiment, the identification plate 1 is installed at the control point on the top of the underground shaft with the support column 2. The end face of the identification plate 1 away from the borehole 100, the end of the support column 2 away from the borehole 100, and the through hole 21 have different structures, which makes the results after the three-dimensional scanning different, and the positional relationship of the three is fixed. When the scanning direction is not perpendicular to the end face of the identification plate 1 away from the borehole 100 and has a certain inclination angle, the scanning results and positional relationship of the three can be used to determine the target center, further improving the accuracy of the three-dimensional laser scanning.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-dimensional laser scanning target, used in mine tunnels with drilled holes in the surrounding rock, characterized in that: include: an identification plate, one end surface of which covers the borehole opening; A support column, one end of which vertically penetrates the middle of the two end surfaces of the identification plate and extends into the drilled hole, and the other end of the support column is provided with a through hole coaxial with the support column.

2. The three-dimensional laser scanning target according to claim 1, characterized in that: The identification plate is provided with an adhesive layer, a support layer and a reflective layer stacked axially along the support column, the adhesive layer is arranged on a side of the support layer adjacent to the drill hole, and the reflective layer is arranged on a side of the support layer away from the drill hole.

3. The three-dimensional laser scanning target according to claim 2, characterized in that: It also includes at least one limiting rod arranged in the supporting layer, the axis of each limiting rod is parallel to the reflecting layer, and one end of each limiting rod is connected to the side wall of the supporting column.

4. The three-dimensional laser scanning target according to claim 3, characterized in that: Fillers are provided between the surrounding rock at the borehole mouth and the space between the bonding layer and the side away from the reflective layer, as well as the interior of the borehole.

5. The three-dimensional laser scanning target according to claim 4, characterized in that: The side wall of the support column is provided with an external thread, and the external thread is arranged on a side of the bonding layer away from the reflective layer.

6. The three-dimensional laser scanning target according to claim 5, characterized in that: The side wall of the support column is provided with a notch which is connected with one end of the through hole adjacent to the drill hole, and the notch is arranged on a side of the reflective layer away from the bonding layer.

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