Fixing device and three-dimensional scanning equipment

Abstract

The utility model relates to a fixing device and three-dimensional scanning equipment, and the fixing device is used for fixing a workpiece, and the fixing device comprises a ridge surface, the width of which is greater than or equal to 2mm and less than or equal to 10mm; and the mark points are attached to the edge surfaces. And within the width range, the mark points can be completely pasted. The mark points serve as feature reference, and clear positioning information is provided for scanning data. The scanning piece calculates the spatial position of the object by identifying the high-contrast mark points, so that the precision and reliability of scanning data are improved. The design of the prismatic surfaces can increase the visibility of the mark points, and especially under the condition of poor light, the prismatic surfaces can reflect light, so that the mark points are more easily captured by a scanner. In addition, natural features may not be sufficient to provide sufficient information for precise registration when scanning objects of complex shapes or single textures. Feature points can be manually added when mark points are pasted, and the later data processing flow is simplified.

Description

Technical Field

[0001] The present application relates to the field of scanning, and in particular to a fixing device and a three-dimensional scanning device. Background Art

[0002] With the rapid development of industrial technology, people have put forward higher requirements for visual measurement systems. In the industrial application of 3D scanning, for a variety of parts, automated 3D scanning is proposed to achieve 3D data acquisition of parts without manual intervention. It has a wide range of applications in product assembly, intelligent manufacturing production lines, and quality inspection departments of related units. However, the existing fixtures are not convenient for image processing after scanning, and there is not enough space to arrange the marking points. Utility Model Content

[0003] The purpose of this application is to provide a fixing device and a three-dimensional scanning device.

[0004] According to a first aspect of an embodiment of the present application, a fixing device is provided for fixing a workpiece, the fixing device comprising:

[0005] A facet, wherein the width of the facet is greater than or equal to 2 mm and less than or equal to 14 mm;

[0006] A marking point is attached to the edge surface.

[0007] In some embodiments, the fixing device includes a first fixing portion and a second fixing portion, the first fixing portion is arranged on the peripheral side of the workpiece to form a fixing space, and the edge surface is arranged on the first fixing portion; the second fixing portion includes a plurality of second fixing units, and the plurality of second fixing units are movably arranged on the first fixing portion and extend to the fixing space;

[0008] Wherein, a plurality of the second fixing units can be relatively moved to contact the workpiece, thereby fixing the workpiece.

[0009] In some embodiments, the first fixing portion is provided with a plurality of fixing holes extending toward the workpiece, the fixing holes are provided on the edge surface, and the second fixing unit is movably connected to the first fixing portion through the fixing holes.

[0010] In some embodiments, the fixing device is further provided with a holding portion, and the holding portion is arranged at the end of the second fixing unit away from the fixing space, and the holding portion is coaxially arranged with the second fixing unit.

[0011] In some embodiments, the second fixing unit and the fixing hole are provided with mutually matching threads, and the second fixing unit can achieve relative movement with the workpiece by rotation.

[0012] In some embodiments, the first fixing portion includes a plurality of first vertical units arranged at intervals, the first vertical units are arranged as prisms, a plurality of second fixing units are arranged perpendicular to the first vertical units, and the fixing space is arranged between the first vertical units.

[0013] In some embodiments, the first fixing portion includes a first horizontal unit arranged along the horizontal direction, the first horizontal unit is arranged as a prism, at least part of the first horizontal unit is arranged between two first vertical units, and the first horizontal unit is fixed to the first vertical unit, the second fixing unit can be arranged on the first horizontal unit, and the second fixing unit located on the first horizontal unit is arranged parallel to the first vertical unit.

[0014] In some embodiments, the fixing device further comprises a supporting portion, which is disposed below the workpiece and is disposed in contact with the workpiece to support the workpiece;

[0015] The supporting portion comprises a supporting surface, the supporting surface is disposed in contact with the workpiece, and the supporting surface is a curved surface and / or a flat surface.

[0016] In some embodiments, when the plurality of second fixing units move to abut against the workpiece, the shortest distance between the first fixing portion and the workpiece is greater than or equal to 30 mm.

[0017] According to a second aspect of the embodiments of the present application, a three-dimensional scanning device is provided, comprising the fixing device described in any one of the above embodiments and a scanning piece, wherein the scanning piece is arranged toward the fixing device.

[0018] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application are:

[0019] The present application sets facets and markers, and sets the width of the facets to be greater than or equal to 2 mm and less than or equal to 10 mm. Within this width range, the markers can be completely pasted. The markers serve as feature references and provide clear positioning information for the scanned data. The scan calculates the spatial position of the object by identifying these high-contrast markers, thereby improving the accuracy and reliability of the scanned data. The facet design can increase the visibility of the markers, especially in poor lighting conditions, the facets can reflect light, making the markers easier to capture by the scanner. In addition, when scanning objects with complex shapes or single textures, natural features may not be sufficient to provide sufficient information for accurate registration. Pasting markers can artificially increase feature points and simplify the subsequent data processing process. For example, when splicing scan data from different perspectives, the markers serve as common reference points to help the software quickly and accurately align the various scan segments. In addition, the facet design can increase the physical stability of the markers, avoid the displacement of the markers due to slight touch or vibration during the scanning process, and ensure the consistency and stability of data acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a schematic diagram showing the cooperation between a fixing device and a workpiece according to an embodiment of the present application.

[0022] Figure 2 It is a schematic structural diagram of a fixing device according to an embodiment of the present application.

[0023] Figure 3 It is a schematic structural diagram of a three-dimensional scanning device according to an embodiment of the present application.

[0024] Figure 4 It is a schematic structural diagram of a support portion according to an embodiment of the present application.

[0025] Figure 5 It is a schematic diagram showing the cooperation between the holding portion and the second fixing portion according to an embodiment of the present application.

[0026] Description of reference numerals:

[0027] Fixing device 10

[0028] Artifact 20

[0029] 3D scanning equipment 30

[0030] Scan 40

[0031] The first fixing portion 100

[0032] Fixed space 110

[0033] Edge 120

[0034] Fixing hole 130

[0035] The first vertical unit 140

[0036] The first horizontal unit 150

[0037] The second fixing portion 200

[0038] The second fixing unit 210

[0039] Grip 300

[0040] Supporting part 400

[0041] Support surface 410 DETAILED DESCRIPTION

[0042] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0043] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0044] This application proposes a three-dimensional scanning device 30, referring to Figure 3As shown, it includes a fixing device 10 and a scanning piece 40, and the scanning piece 40 is arranged toward the fixing device 10. The fixing methods of the general three-dimensional scanning device 30 include: 1. Using a clamp and a clamping system. For objects of regular shape, special clamps or spring clips can be used to fix them. These clamps can be adjusted according to the size of the object to ensure that the object does not move during the scanning process. 2. Using adhesives or double-sided tapes. For small, lightweight or smooth-surfaced objects, low-residue adhesives or double-sided tapes can be used to temporarily fix them on the turntable or scanning area. After the scanning is completed, it is easy to remove and will not damage the surface of the object. 3. Using vacuum adsorption. For flat objects, some scanning devices are equipped with a vacuum adsorption platform, which can form negative pressure by extracting air and firmly adsorb the object. It is particularly suitable for thin sheets or surfaces that are easy to slide. 4. Straps or cable ties. For objects with irregular shapes or difficult to place directly, elastic straps, cable ties or Velcro straps can be used to fix them on the turntable, especially for large or soft objects. 5. Magnetic fixation: Some scanning devices or trays have magnetic materials at the bottom, which can absorb scans containing iron components or specially attached with magnetic patches to achieve fast and stable positioning. 6. For scans of special shapes or sizes, a customized bracket may be required to support or wrap the items to ensure their stability during the scanning process. The above fixing methods are not convenient for image processing after the scan is completed, and there is not enough space to arrange the landmarks.

[0045] refer to Figure 1 and Figure 2 As shown, the present application proposes a fixing device 10 for fixing a workpiece 20, the fixing device 10 includes: an edge surface 120 and a marking point (not shown in the figure), the width of the edge surface 120 is greater than or equal to 2mm, and less than or equal to 14mm; the marking point is attached to the edge surface 120. It should be noted that the diameter of the marking point is generally 4mm, 6mm, and 8mm. In addition, the width of the edge surface 120 is greater than or equal to 2mm, and less than or equal to 10mm. Within this width range, the marking point can be completely attached. For example, the width of the edge surface 120 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, and 14mm.

[0046] The marker points serve as feature references and provide clear positioning information for the scanned data. The scanned piece 40 calculates the spatial position of the object by identifying these high-contrast marker points, thereby improving the accuracy and reliability of the scanned data. The facet 120 design can increase the visibility of the marker points, especially in poor lighting conditions. The facet 120 can reflect light, making the marker points easier to be captured by the scanner. In addition, when scanning objects with complex shapes or single textures, natural features may not be sufficient to provide sufficient information for accurate alignment. Affixing marker points can artificially increase feature points and simplify the subsequent data processing process. For example, when splicing scan data from different perspectives, the marker points serve as common reference points to help the software quickly and accurately align the various scan segments. In addition, the facet 120 design can increase the physical stability of the marker points, avoid the displacement of the marker points due to slight touch or vibration during the scanning process, and ensure the consistency and stability of data acquisition.

[0047] refer to Figure 1 and Figure 2 As shown, the fixing device 10 includes: a first fixing part 100 and a second fixing part 200. The first fixing part 100 is arranged on the periphery of the workpiece 20 to form a fixing space 110; the second fixing part 200 includes a plurality of second fixing units 210, and the plurality of second fixing units 210 are movably arranged on the first fixing part 100 and extend into the fixing space 110; wherein the plurality of second fixing units 210 can be relatively moved to contact the workpiece 20, thereby fixing the workpiece 20.

[0048] Based on the above arrangement, after placing the workpiece 20 into the fixed space 110, the user only needs to relatively move the second fixing unit 210 until it contacts the workpiece 20 to fix the workpiece 20. Similarly, by relatively moving the second fixing unit 210 until it does not contact the workpiece 20, the fixation can be released and the workpiece 20 can be removed. The fixing and releasing process is simple and convenient, and the workpiece 20 can be replaced simply and quickly. This avoids the cumbersome replacement process, reduces the operation time, and improves the operation efficiency. In addition, the fixing device 10 is versatile and can achieve conflicting fixation for workpieces 20 of different shapes.

[0049] In this embodiment, reference Figure 1 and Figure 2 As shown, the first fixing part 100 specifically includes a plurality of first vertical units 140 arranged at intervals, the first vertical units 140 are arranged as prisms, a plurality of second fixing units 210 are arranged perpendicular to the first vertical units 140, and the fixing space 110 is arranged between the first vertical units 140. Figure 1 As shown, when the workpiece 20 is small and light, the workpiece 20 can be fixed directly by the second fixing units 210 located on the first vertical units 140 contacting each other.

[0050] In addition, continue to refer to Figure 1 and Figure 2 As shown, the first fixing part 100 also includes a first horizontal unit 150 arranged in the horizontal direction, the first horizontal unit 150 is a prism arrangement, at least part of the first horizontal unit 150 is arranged between the two first vertical units 140, and the first horizontal unit 150 and the first vertical unit 140 are fixedly arranged, and the second fixing unit 210 can be arranged on the first horizontal unit 150, and the second fixing unit 210 located on the first horizontal unit 150 is arranged parallel to the first vertical unit 140. The first horizontal unit 150 and the first vertical unit 140 cooperate with each other to increase the overall stability of the fixing device 10. In addition, the first horizontal unit 150 and the first vertical unit 140 can be arranged with the second fixing unit 210, so that the workpiece 20 can be supported from multiple directions, thereby making the workpiece 20 more firmly fixed. In addition, it should be noted that the first horizontal unit 150 and the first vertical unit 140 can both be regular polygonal prisms. For example, the first horizontal unit 150 and the first vertical unit 140 can be regular triangular prisms, regular quadrangular prisms, regular pentagonal prisms, regular hexagonal prisms, regular heptagonal prisms, and regular octagonal prisms. The prism arrangement facilitates computer image splicing processing after scanning the scanning piece 40 of the three-dimensional scanning device 30. Figure 1 , Figure 2 As shown, the first horizontal unit 150 and the first vertical unit 140 are arranged in the shape of a regular hexagonal prism.

[0051] In one embodiment, reference Figure 1 and Figure 2 As shown, the first fixing portion 100 includes a plurality of facets 120 , and the first fixing portion 100 is provided with a plurality of fixing holes 130 extending toward the workpiece 20 , the fixing holes 130 are provided on the facets 120 , and the second fixing unit 210 is movably connected to the first fixing portion 100 through the fixing holes 130 .

[0052] The fixing hole 130 extends toward the workpiece 20 , so the second fixing unit 210 also moves toward the workpiece 20 through the fixing hole 130 , thereby better achieving interference with the workpiece 20 .

[0053] refer to Figure 2 As shown, the first horizontal unit 150 and the first vertical unit 140 are both provided with a plurality of fixing holes 130, and the plurality of fixing holes 130 are arranged at intervals on the first horizontal unit 150 and the first vertical unit 140. The user can select the position where the second fixing unit 210 is inserted into the fixing hole 130 according to the shape and size of the workpiece 20 and other factors, and can also determine the insertion depth of the second fixing unit 210 according to the shape and size of the workpiece 20 and other factors, so that the second fixing unit 210 fits tightly with the workpiece 20, thereby fixing the workpiece 20 more firmly. Figure 1In the embodiment, the fixing device 10 includes two first vertical units 140 and a first horizontal unit 150. The user sets a second fixing unit 210 on each first vertical unit 140, and the two second fixing units 210 are set on the same horizontal line. The two second fixing units 210 both contact the workpiece 20 to achieve force balance. Figure 2 In the figure, the fixing device 10 includes four first vertical units 140 and four first horizontal units 150. The four first vertical units 140 and the four first horizontal units 150 are fixed to each other to form a rectangular fixed space 110. The user sets two second fixing units 210 on each first vertical unit 140, and does not set any second fixing unit 210 on the first horizontal unit 150.

[0054] In this embodiment, reference Figure 1 , Figure 2 as well as Figure 5 As shown, the fixing device 10 is further provided with a holding portion 300, which is arranged at the end of the second fixing unit 210 away from the fixing space 110, and the holding portion 300 is coaxially arranged with the second fixing unit 210. Figure 1 As shown, the holding portion 300 may be a convex arrangement, referring to Figure 5 As shown, the protrusion has multiple force-bearing surfaces. The holding portion 300 can also be a force-applying hole, which can cooperate with an external rod to form a force arm for easier rotation. As long as it is convenient for the second fixing unit 210 to rotate, it is within the protection scope of the present application. In addition, the second fixing unit 210 and the fixing hole 130 are provided with mutually matching threads, and the second fixing unit 210 can achieve relative movement with the workpiece 20 by rotation. The thread can well enable relative movement between the second fixing unit 210 and the first fixing portion 100, and at the same time, the thread design can form a good support force for the workpiece 20 when the second fixing unit 210 moves to the corresponding position, thereby fixing the workpiece 20.

[0055] In this embodiment, the holding portion 300 is coaxially arranged with the second fixing unit 210. Therefore, when the holding portion 300 is rotated, the second fixing unit 210 rotates accordingly, and the second fixing unit 210 and the fixing hole 130 change their positions relative to each other through threads, thereby fixing or releasing the workpiece 20.

[0056] In one embodiment, reference Figure 2 and Figure 4 As shown, the fixture 10 further includes a support portion 400, which is disposed below the workpiece 20 and is disposed in contact with the workpiece 20 for supporting the workpiece 20; the support portion 400 includes a support surface 410, which is disposed in contact with the workpiece 20, and the support surface 410 is an arc surface. In other embodiments, the support surface 410 can be a plane.

[0057] The support part 400 is disposed below the workpiece 20, so as to support the gravity of the workpiece 20, lift the workpiece 20, and fix the workpiece 20 in cooperation with the first fixing part 100 and the second fixing part 200. In particular, for a relatively heavy workpiece 20, when the second fixing part 200 cannot directly fix the workpiece 20 by contacting the workpiece 20, the support part 400 can play a good lifting role. Due to the supporting role of the support part 400, the bearing capacity of the fixing device 10 is enhanced. Figure 2 As shown, the support portion 400 is disposed in the fixing space 110, and a plurality of second fixing units 210 are arranged on the upper side of the support portion 400, so that the workpiece 20 can receive the support force from the support portion 400 and the support force from the second fixing units 210 on the side, thereby making the workpiece 20 more stably fixed. Figure 1 As shown, it can be Figure 1 A support portion 400 is also provided below the workpiece 20 to apply a supporting force to the workpiece 20 so that Figure 1 The workpiece 20 is fixed more stably.

[0058] In one embodiment, reference Figure 1 As shown, when the plurality of second fixing units 210 move to contact the workpiece 20, the shortest distance between the first fixing portion 100 and the workpiece 20 is greater than or equal to 30 mm. For example, the shortest distance between the first fixing portion 100 and the workpiece 20 may be 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm. At this distance, during scanning, the first fixing portion 100 blocks less of the workpiece 20, so that more surfaces are scanned and less blocked, thereby obtaining a clearer three-dimensional image in post-processing.

[0059] In this embodiment, the prism face 120 may be arranged toward the fixed space 110. Compared with the arrangement of the prism edge toward the fixed space 110, this arrangement can maximize the distance between the first fixing portion 100 and the workpiece 20, thereby minimizing the shielding of the workpiece 20. Figure 1 and Figure 2 As shown, the first horizontal unit 150 and the first vertical unit 140 are both arranged with the edge surface 120 facing the fixed space 110 . Such an arrangement can also increase the space of the fixed space 110 , making it easier to put the workpiece 20 into the fixed space 110 .

[0060] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A fixing device for fixing a workpiece, characterized in that: The fixing device comprises: A facet, wherein the width of the facet is greater than or equal to 2 mm and less than or equal to 14 mm; A marking point, wherein the marking point is attached to the edge surface; a first fixing part and a second fixing part, wherein the first fixing part is arranged on the peripheral side of the workpiece to form a fixing space, and the edge surface is arranged on the first fixing part; the second fixing part comprises a plurality of second fixing units, and the plurality of second fixing units are movably arranged on the first fixing part and extend to the fixing space; Wherein, a plurality of the second fixing units can be relatively moved to contact the workpiece, thereby fixing the workpiece.

2. The fixing device according to claim 1, characterized in that The first fixing portion is provided with a plurality of fixing holes extending toward the workpiece, the fixing holes are arranged on the edge surface, and the second fixing unit is movably connected to the first fixing portion through the fixing holes.

3. The fixing device according to claim 2, characterized in that: The fixing device is further provided with a holding portion, which is arranged at the end of the second fixing unit away from the fixing space, and the holding portion is coaxially arranged with the second fixing unit.

4. The fixing device according to claim 2, characterized in that: The second fixing unit and the fixing hole are provided with mutually matching threads, and the second fixing unit can achieve relative movement with the workpiece by rotating.

5. The fixing device according to claim 1, characterized in that: The first fixing portion includes a plurality of first vertical units arranged at intervals, the first vertical units are arranged as prisms, a plurality of second fixing units are arranged perpendicular to the first vertical units, and the fixing space is arranged between the first vertical units.

6. The fixing device according to claim 5, characterized in that: The first fixing portion includes a first horizontal unit arranged along the horizontal direction, the first horizontal unit is arranged as a prism, at least part of the first horizontal unit is arranged between two first vertical units, and the first horizontal unit is fixed to the first vertical unit, the second fixing unit can be arranged on the first horizontal unit, and the second fixing unit located on the first horizontal unit is arranged parallel to the first vertical unit.

7. The fixing device according to claim 1, characterized in that: The fixing device further comprises a supporting portion, which is disposed below the workpiece and is disposed in contact with the workpiece, and is used to support the workpiece; The supporting portion comprises a supporting surface, the supporting surface is disposed in contact with the workpiece, and the supporting surface is a curved surface and / or a flat surface.

8. The fixing device according to claim 1, characterized in that: When the plurality of second fixing units move to abut against the workpiece, the shortest distance between the first fixing portion and the workpiece is greater than or equal to 30 mm.

9. A three-dimensional scanning device, characterized in that: It comprises a fixing device as described in any one of claims 1 to 8 and a scanning piece, wherein the scanning piece is arranged toward the fixing device.

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