Scanning target fixing device

Abstract

The present invention provides a scanning target fixing device. It includes a target fixing seat, a bracket rod group and a bracket terminal; the bracket rod group includes at least three bracket rods, one end of each of the bracket rods is hinged to the target fixing seat, and the other end of each of the bracket rods is provided with a bracket terminal; the target fixing seat includes a magnetic base and a target fixing clamp; the target fixing clamp is installed on the magnetic base to adsorb and clamp the scanning target; the bottom of the bracket terminal is provided with a magnetic chassis that can be mutually attracted and fixed with the magnetic mounting surface to realize the installation of the scanning target fixing device in a horizontal or non-horizontal plane. The present invention fixes the scanning target by the target fixing clamp and the magnetic base, so that the scanning target will not fall off from the fixing device when it is installed in a non-horizontal plane; by using the combination of the bracket rod and the magnetic bracket terminal, the problem of large limitations in the layout of three-dimensional laser scanning targets is solved.

Description

Technical Field

[0001] The invention relates to the technical field of laser scanning, and in particular to a scanning target fixing device. Background Art

[0002] 3D laser scanning technology is developing rapidly. It has replaced many traditional single-point coordinate measurement methods due to its high efficiency, non-contact and high-precision acquisition of multivariate data such as point cloud coordinates, color and reflectivity on the surface of the scanned object. The multi-station original point cloud data obtained by 3D laser scanning requires common features as splicing primitives when splicing and orienting, among which scanning targets are the most commonly used common features. Common scanning targets include spherical targets and black and white chessboard-shaped plane targets. Spherical targets are mostly plastic balls with good reflection, and black and white chessboard-shaped plane targets are mostly metal sheets coated with a variety of high-contrast reflective coatings. Whether it is a standard target produced by the scanner manufacturer or a target produced by the research team itself, a cylindrical metal connecting rod or a magnetic base needs to be installed at the bottom of the target so that the scanning target can be installed on the prism base for surveying and mapping or adsorbed on the surface of an iron object to achieve the purpose of stabilizing the scanning target.

[0003] The magnetic base of the scanning target is short and cannot be changed in length. At this time, the scanning target is close to the object when it is adsorbed on the surface of the iron object, and it is easily blocked by other objects in the scanning field of view, resulting in a smaller selectable area when laying out the target ball, and greater limitations on laying out. If the scanning target is placed on a tripod, it can only be set up on a horizontal upward plane, and cannot be set up on a vertical surface or a horizontal downward surface, which has greater limitations on laying out.

[0004] In summary, there is an urgent need for a scanning target fixing device to solve the problems existing in the prior art. Summary of the invention

[0005] The present invention aims to provide a scanning target fixing device to solve the problem of setting up three-dimensional laser scanning targets in different environments.

[0006] To achieve the above-mentioned object, the present invention provides a scanning target fixing device, comprising a target fixing seat, a support rod group and a support terminal; the support rod group comprises at least three support rods, one end of each of the support rods is hinged to the target fixing seat, and the other end of each of the support rods is provided with a support terminal;

[0007] The target fixing seat includes a magnetic base and a target fixing clamp; the target fixing clamp is installed on the magnetic base to adsorb and clamp the scanning target;

[0008] A magnetic chassis capable of being attracted and fixed to a magnetic mounting surface is provided at the bottom of the bracket terminal, so as to realize the installation of the scanning target fixing device on a horizontal or non-horizontal plane.

[0009] Preferably, the bracket terminal also includes a bracket sleeve and a limiting truncated table with a through hole; the top of the bracket sleeve is connected to the bracket rod, and the bottom of the bracket sleeve is inserted into the through hole of the limiting truncated table and can be rotatably set; the bottom of the limiting truncated table is connected to the magnetic chassis to adjust the installation posture of the bracket terminal.

[0010] Preferably, the upper portion of the bracket sleeve is a hollow cylindrical end with an internal thread, which is used for detachably connecting to a bracket rod with an external thread; the lower portion of the bracket sleeve is a spherical end, and the specifications of the spherical end are larger than the specifications of the top of the through hole in the limiting table, so as to prevent the bracket sleeve from falling out when rotating in the limiting table.

[0011] Preferably, a magnetic element mounting hole for mounting a magnetic element is provided on the top of the magnetic base; the axis of the magnetic element mounting hole coincides with the axis of the magnetic base; and bracket rod mounting seats are evenly provided on the outer side of the magnetic base for connecting with the bracket rod.

[0012] Preferably, at least three screw hole columns are provided on the top of the magnetic base, and the cross-section of the screw hole column body along the height direction is polygonal for installing the target fixing clamp.

[0013] Preferably, the target fixing pliers include a rotating shaft and a pliers body; the two pliers bodies are hinged in the middle through the rotating shaft, and a torsion spring is mounted on the rotating shaft to keep the two pliers bodies clamped when stationary; a connecting hole is opened on the rotating shaft, and the size of the connecting hole matches the external size of the screw hole column, so as to install the target fixing pliers on the magnetic base.

[0014] Preferably, the target fixing seat also includes a semi-open shell; the semi-open shell includes a circular top plate and a cylindrical side plate arranged along the edge of the circular top plate; a notch is provided on the cylindrical side plate to avoid interference between the cylindrical side plate and the target fixing clamp; a fixing column is provided on the cylindrical side plate, the axis of the fixing column points to the center of the target fixing clamp, and the fixing column is provided with a threaded hole along the axis to install a tightening bolt to cooperate with the target fixing clamp to fix the scanning target; the circular top plate is provided with a mounting hole matching the screw hole column to install the semi-open shell on the top of the magnetic base.

[0015] Preferably, a target through hole is provided on the annular top plate, and the axis of the target through hole coincides with the axis of the magnetic base; the diameter of the target through hole is larger than the diameter of the scanning target base, so as to install the scanning target on the magnetic base.

[0016] Preferably, a limiting groove is provided on the upper surface of the magnetic base; the limiting groove is matched in shape with the bottom of the cylindrical side plate to limit the semi-open housing.

[0017] Preferably, a threaded hole is provided at the top of the support rod for connection with the target fixing seat; a thread is provided at the tail of the support rod for connection with the support terminal; and the end of the support rod is a pointed end for setting up a scanning target fixing device on uneven ground.

[0018] The application of the technical solution of the present invention has the following beneficial effects:

[0019] (1) In the present invention, the scanning target is fixed by a target fixing clamp and a magnetic base, so that the scanning target will not fall off from the fixing device when it is set up on a non-horizontal plane; by using a combination of a bracket rod and a magnetic bracket terminal, on the one hand, the height of the scanning target is increased and it is not easily blocked by other objects; on the other hand, the three-dimensional laser scanning target can be set up on a non-horizontal plane through the magnetic bracket terminal, thereby solving the problem of large limitations in the layout of the three-dimensional laser scanning target.

[0020] (2) In the present invention, the bracket sleeve and the limiting truncated table are rotatably connected, so as to adjust the posture of the bracket terminal, facilitate the adjustment of the installation position of the scanning target, and prevent it from being blocked, so that the scanning target meets the use requirements.

[0021] (3) In the present invention, the support rod and the support terminal are detachably connected, the end of the support rod is a pointed end, and the support terminal is provided with a magnetic chassis, so that the scanning target fixing device can be placed on a flat surface and an iron plane, and can also be set up on an uneven ground. At the same time, an anti-skid pad is added to the support terminal to prevent the scanning target fixing device from slipping when measuring on a smooth surface, thereby affecting the scanning result.

[0022] (4) In the present invention, the metal base of the scanning target is effectively fixed by the cooperation of the magnetic base, the target fixing clamp and the tightening bolt. The target fixing clamp and the tightening bolt fix the metal base of the scanning target in a three-point horizontal direction, and the magnetic base fixes the metal base of the scanning target in a vertical direction, so as to prevent the scanning target from being separated from the scanning target fixing device during the measurement process, thereby affecting the scanning result.

[0023] (5) In the present invention, a screw hole column with a polygonal cross-section along the height direction is provided on the magnetic base, and a connecting hole matching the screw hole column is provided on the rotating shaft of the target fixing clamp, so that the target fixing clamp will not rotate relative to the screw hole column, thereby preventing the center of the jaws of the target fixing clamp from being relatively offset from the axis of the magnetic base, and making it more reliable for the target fixing clamp to clamp the scanning target base.

[0024] (6) In the present invention, a semi-open shell is arranged on the magnetic base, and a notch is provided on the cylindrical side plate of the semi-open shell, so as to prevent the target fixing clamp from falling off from the upper part of the magnetic base and avoid the semi-open shell from hindering the opening and closing of the jaws of the target fixing clamp.

[0025] (7) In the present invention, a limiting groove matching the bottom of the semi-open shell is provided on the top of the magnetic base, which can limit the semi-open shell and improve the assembly efficiency of the device.

[0026] (8) In the present invention, lightweight materials are used to manufacture the support rods, which reduces the weight of the device and the labor intensity of workers in carrying the support. The device has a simple structure and is easy to assemble, which greatly improves the installation efficiency of workers.

[0027] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a schematic diagram of the overall structure of the scanning target fixing device;

[0030] Figure 2 It is a schematic diagram of the structure explosion of the target fixing seat;

[0031] Figure 3 is a schematic diagram of the structure of the support rod;

[0032] Figure 4 It is a schematic diagram of the structural explosion of the bracket terminal;

[0033] Among them, 1. target fixing seat, 1.1. magnetic base, 1.1.1. magnetic element mounting hole, 1.1.2. magnetic element, 1.1.3. bracket rod mounting seat, 1.1.4. screw hole column, 1.1.5. limiting groove, 1.2. semi-open shell, 1.2.1. circular top plate, 1.2.11. target through hole, 1.2.2. cylindrical side plate, 1.2.21. fixing column, 1.2.22. tightening bolt, 1.3. target fixing clamp, 1.3.1. rotating shaft, 1.3.2. clamp body, 2. bracket rod group, 2.1. bracket rod, 3. bracket terminal, 3.1. bracket sleeve, 3.1.1. cylindrical end, 3.1.2. spherical end, 3.2. limiting frustum, 3.3. magnetic chassis, 3.4. anti-slip pad. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0035] See also Figures 1 to 4, a scanning target fixing device, this embodiment is applied to three-dimensional laser scanning target fixing.

[0036] A scanning target fixing device comprises a target fixing seat 1, a support rod group 2 and a support terminal 3; the support rod group 2 comprises at least three support rods 2.1, one end of each of the support rods 2.1 is hinged to the target fixing seat 1, and the other end of each of the support rods 2.1 is provided with a support terminal 3; in this embodiment, the support rod group 2 is provided with three support rods 2.1.

[0037] See also Figure 2 The target fixing seat 1 includes a magnetic base 1.1 and a target fixing clamp 1.3; the target fixing clamp 1.3 is installed on the magnetic base 1.1 to adsorb and clamp the scanning target.

[0038] See also Figure 4 A magnetic chassis 3.3 is provided at the bottom of the bracket terminal 3, which can be attracted and fixed to the magnetic mounting surface, so as to realize the installation of the scanning target fixing device on a horizontal or non-horizontal plane; an anti-skid pad 3.4 can be installed at the bottom of the magnetic chassis 3.3 to prevent the scanning target fixing device from slipping on a smooth surface and affecting the scanning result.

[0039] The bracket terminal 3 also includes a bracket sleeve 3.1 and a limiting truncated cone 3.2 with a through hole; the top of the bracket sleeve 3.1 is connected to the bracket rod 2.1, and the bottom of the bracket sleeve 3.1 is rotatably installed in the limiting truncated cone 3.2; the bottom of the limiting truncated cone 3.2 is connected to the magnetic chassis 3.3 to adjust the installation posture of the bracket terminal 3, thereby adjusting the posture of the bracket rod 2.1; the magnetic chassis 3.3 is fixedly installed at the bottom of the limiting truncated cone 3.2 to be installed and fixed on a magnetic mounting surface (such as an iron surface, etc.) that can be attracted to the magnetic chassis 3.3, and the magnetic mounting surface is a vertical surface or a horizontal surface (such as a top adsorption installation, with the scanning target fixing device facing downward), thereby realizing the installation of the scanning target on a non-horizontal plane.

[0040] See also Figure 4 The upper part of the bracket sleeve 3.1 is a cylindrical end 3.1.1 with an internal thread, which is used for detachably connecting with the bracket rod 2.1 with an external thread; the lower part of the bracket sleeve is a spherical end 3.1.2; the specification of the spherical end 3.1.2 is larger than the specification of the top through hole in the limiting truncated cone 3.2, and the diameter of the spherical end 3.1.2 is 1.1 to 1.5 times the diameter of the top through hole, which is used to prevent the bracket sleeve 3.1 from falling out when rotating in the limiting truncated cone 3.2; the specification of the spherical end 3.1.2 should be smaller than the specification of the bottom of the through hole in the limiting truncated cone 3.2, so as to facilitate the bracket sleeve 3.1 to be installed from the bottom through hole of the truncated cone 3.2.

[0041] See also Figure 2A magnetic element mounting hole 1.1.1 is provided on the top of the magnetic base 1.1; the axis of the magnetic element mounting hole 1.1.1 coincides with the axis of the magnetic base 1.1; the magnetic element 1.1.2 is installed inside the magnetic element mounting hole 1.1.1, and is used to adsorb and fix the metal base of the scanning target. In this embodiment, the magnetic element 1.1.2 is a neodymium magnet with strong magnetic force; bracket rod mounting seats 1.1.3 are evenly provided on the outer side of the magnetic base 1.1, which are used to connect with the bracket rod 2.1; at least three screw hole columns 1.1.4 are provided on the upper surface of the magnetic base 1.1, and the cross-section of the screw hole column 1.1.4 along its height direction is a polygon, which is used to install the target fixing clamp 1.3; in this embodiment, the cross-section of the screw hole column 1.1.4 along its height direction is a triangle.

[0042] See also Figure 2 The target fixing clamp 1.3 includes a rotating shaft 1.3.1 and a clamp body 1.3.2; the two clamp bodies 1.3.2 are hinged in the middle through the rotating shaft 1.3.1, and the rotating shaft 1.3.1 is provided with a torsion spring to keep the clamp body 1.3.2 clamped when stationary; the rotating shaft 1.3.1 is provided with a through hole along the axis, and the through hole size matches the external size of the screw hole column 1.1.4, so as to install the target fixing clamp 1.3 on the magnetic base 1.1. Since the cross-section of the screw hole column 1.1.4 is a polygon, the rotating shaft 1.3.1 will not rotate around the screw hole column 1.1.4, so that the center of the jaws of the target fixing clamp 1.3 and the axis of the magnetic base 1.1 will not be relatively offset, so that the target fixing clamp 1.3 is more reliable when clamping the scanning target base.

[0043] See also Figure 2 The target fixing seat 1 also includes a semi-open shell 1.2; the semi-open shell 1.2 includes a circular top plate 1.2.1 and a cylindrical side plate 1.2.2 arranged along the edge of the circular top plate 1.2.1; a notch is arranged on the cylindrical side plate 1.2.2 to avoid interference between the semi-open shell 1.2 and the target fixing clamp 1.3; a fixing column 1.2.21 is arranged on the cylindrical side plate 1.2.2, and the axis of the fixing column 1.2.21 points to the target fixing The center of the rotating shaft 1.3.1 of the clamp 1.3; the fixing column 1.2.21 is provided with a threaded hole along the axis; it is used to install the tightening bolt 1.2.22 to tighten the scanning target base, and cooperate with the target fixing clamp 1.3 to fix the scanning target; the circular top plate 1.2.1 is provided with a mounting hole matching the screw hole column 1.1.4, which is used to install the semi-open housing 1.2 on the top of the magnetic base 1.1 through bolts to prevent the target fixing clamp 1.3 from falling off from the top of the magnetic base 1.1.

[0044] See also Figure 2A target through hole 1.2.11 is provided on the circular top plate 1.2.1, and the axis of the target through hole 1.2.11 coincides with the axis of the magnetic base 1.1; the diameter of the target through hole 1.2.11 is larger than the diameter of the scanning target base, so that the scanning target base passes through the semi-open shell 1.2 and is placed on the magnetic base 1.1.

[0045] See also Figure 2 The upper surface of the magnetic base 1.1 is provided with a limiting groove 1.1.5; the shape of the limiting groove 1.1.5 matches the bottom of the cylindrical side plate 1.2.2, so as to limit the half-open housing 1.2.

[0046] See also Figure 3 The top of the support rod 2.1 is provided with a threaded hole for connecting with the target fixing seat 1; the tail of the support rod 2.1 is provided with a thread for connecting with the support terminal 3; the end of the support rod 2.1 is a pointed end. When using the scanning target for measurement on a non-flat ground, the support terminal 3 is removed and the pointed end of the support rod 2.1 is directly placed on the ground for measurement. The support rod 2.1 can be made of lightweight materials, such as aluminum alloy. In this embodiment, the support rod 2.1 is made of aluminum alloy, which has the characteristics of high strength and light weight.

[0047] The method of using the above scanning target fixing device is as follows:

[0048] Step 1: Choose whether to install the bracket terminal 3 at the end of the bracket rod 2.1 according to the installation environment to complete the assembly of the scanning target fixing device;

[0049] Step 2: Open the jaws of the target fixing clamp 1.3, and then place the metal base of the scanning target on the magnetic base 1.1 for adsorption, then loosen the target fixing clamp 1.3 to close the jaws, clamp the scanning target base, and then install the tightening bolts 1.2.22 to effectively fix the metal base of the scanning target;

[0050] Step 3: Place the scanning target fixture equipped with the scanning target on the installation surface, or adsorb the magnetic chassis 3.3 of the scanning target fixture on the installation surface, adjust the posture of the bracket rod 2.1 and the bracket terminal 3, so that the scanning target is located at the measurement position, and perform three-dimensional laser scanning measurement.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A scanning target fixing device, characterized in that: It comprises a target fixing seat (1), a support rod group (2) and a support terminal (3); the support rod group (2) comprises at least three support rods (2.1), one end of each of the support rods (2.1) is hinged to the target fixing seat (1), and the other end of each of the support rods (2.1) is provided with a support terminal (3); The target fixing seat (1) comprises a magnetic base (1.1) and a target fixing clamp (1.3); the target fixing clamp (1.3) is installed on the magnetic base (1.1) and is used to adsorb and clamp the scanning target; The bottom of the bracket terminal (3) is provided with a magnetic chassis (3.3) that can be mutually attracted and fixed with the magnetic mounting surface, so as to realize the installation of the scanning target fixing device on a horizontal or non-horizontal plane; The top of the magnetic base (1.1) is provided with at least three screw hole columns (1.1.4), the cross section of the screw hole columns (1.1.4) along the height direction is polygonal, and is used to install the target fixing clamp (1.3); The target fixing clamp (1.3) comprises a rotating shaft (1.3.1) and a clamp body (1.3.2); the two clamp bodies (1.3.2) are hinged in the middle through the rotating shaft (1.3.1), and a torsion spring is sleeved on the rotating shaft (1.3.1) to keep the two clamp bodies (1.3.2) clamped when stationary; a connecting hole is opened on the rotating shaft (1.3.1), and the size of the connecting hole matches the external size of the screw hole column (1.1.4) to install the target fixing clamp (1.3) on the magnetic base (1.1); The target fixing seat (1) further comprises a semi-open shell (1.2); the semi-open shell (1.2) comprises a circular top plate (1.2.1) and a cylindrical side plate (1.2.2) arranged along the edge of the circular top plate (1.2.1); a notch is arranged on the cylindrical side plate (1.2.2) to avoid interference between the cylindrical side plate (1.2.2) and the target fixing clamp (1.3); a fixing column (1.2.2) is arranged on the cylindrical side plate (1.2.2) .2.21), the axis of the fixing column (1.2.21) points to the center of the target fixing clamp (1.3), and the fixing column (1.2.21) is provided with a threaded hole along the axis for installing a tightening bolt (1.2.22) to cooperate with the target fixing clamp (1.3) to fix the scanning target; the annular top plate (1.2.1) is provided with a mounting hole matching the screw hole column (1.1.4) for mounting the semi-open housing (1.2) on the top of the magnetic base (1.1).

2. A scanning target fixing device according to claim 1, characterized in that: The bracket terminal (3) also comprises a bracket sleeve (3.1) and a limiting truncated table (3.2) having a through hole; the top of the bracket sleeve (3.1) is connected to the bracket rod (2.1), and the bottom of the bracket sleeve (3.1) is inserted into the through hole of the limiting truncated table (3.2) and can be rotatably arranged; the bottom of the limiting truncated table (3.2) is connected to the magnetic chassis (3.3) to adjust the installation posture of the bracket terminal (3).

3. A scanning target fixing device according to claim 2, characterized in that: The upper portion of the support sleeve (3.1) is a hollow cylindrical end (3.1.1) with an internal thread, which is used for being detachably connected to a support rod (2.1) with an external thread; the lower portion of the support sleeve (3.1) is a spherical end (3.1.2), the specification of the spherical end (3.1.2) being larger than the specification of the top of the through hole in the limiting truncated table (3.2), so as to prevent the support sleeve (3.1) from falling out when rotating in the limiting truncated table (3.2).

4. A scanning target fixing device according to claim 1, characterized in that: The top of the magnetic base (1.1) is provided with a magnetic element mounting hole (1.1.1) for mounting a magnetic element (1.1.2); the axis of the magnetic element mounting hole (1.1.1) coincides with the axis of the magnetic base (1.1); and the outer side surface of the magnetic base (1.1) is evenly provided with support rod mounting seats (1.1.3) for connecting with the support rod (2.1).

5. A scanning target fixing device according to claim 1, characterized in that: The annular top plate (1.2.1) is provided with a target through hole (1.2.11), the axis of the target through hole (1.2.11) coincides with the axis of the magnetic base (1.1); the diameter of the target through hole (1.2.11) is larger than the diameter of the scanning target base, and is used to install the scanning target on the magnetic base (1.1).

6. A scanning target fixing device according to claim 1, characterized in that: The upper surface of the magnetic base (1.1) is provided with a limiting groove (1.1.5); the shape of the limiting groove (1.1.5) matches the bottom of the cylindrical side plate (1.2.2) and is used to limit the half-open housing (1.2).

7. A scanning target fixing device according to claim 1, characterized in that: The top of the support rod (2.1) is provided with a threaded hole for connecting to a target fixing seat (1); the tail of the support rod (2.1) is provided with a thread for connecting to a support terminal (3); the end of the support rod (2.1) is a pointed end for setting up a scanning target fixing device on a non-flat ground.

Images