Replaceable pin type coding mark point for laser projection positioning system

Abstract

The utility model discloses a replaceable pin type coding mark point for a laser projection positioning system, which belongs to the technical field of laser projection and comprises a target and a positioning pin which are detachably and fixedly connected with each other, and the target is further provided with a coding reference point suitable for being identified by the laser projection positioning system. According to the embodiment of the utility model, the target and the positioning pin are detachably connected, only one set of target and one set of positioning pins with different diameters need to be prepared, and flexible assembly can be carried out according to the size of a datum hole in a workpiece and a required coding reference point during use, so that the number of spare parts is reduced, and the use cost is saved. And meanwhile, high-efficiency and high-precision adaptation to datum holes with different diameters is realized, so that a projection system can identify coding standard points, and the aim of aligning a coordinate system of a CAD model corresponding to a workpiece object is realized.

Description

Technical Field

[0001] This utility model relates to the field of laser projection technology, and in particular to a replaceable pin-type coded marker for a laser projection positioning system. Background Technology

[0002] In a laser projection positioning system, a monocular or multi-view camera is needed to identify pre-set coded markers on the workpiece to locate its position. This guides the laser projection positioning system to project the required laser pattern onto the workpiece, which in turn instructs workers to process the workpiece or assemble parts according to the position of the laser pattern.

[0003] Typically, the coding marker is set on the locating pin, which is then fixedly connected to the reference hole on the workpiece. However, in actual use, due to the different sizes of the workpieces, the diameters of the reference holes on them also vary, which results in different diameters of the required locating pins.

[0004] The product of the number of categories of coded reference points and the number of categories of positioning pin diameters is the total number of coded marker points required. It is evident that existing laser projection positioning systems require a large number of coded marker points, leading to increased operating costs. Furthermore, finding the target coded point already set in the projection software among a large number of coded reference points presents certain difficulties, resulting in decreased efficiency. Summary of the Invention

[0005] To address the problem that existing laser projection positioning systems require a large number and specifications of coded markers to accommodate reference holes of different diameters, the present invention aims to provide a replaceable pin-type coded marker for laser projection positioning systems, thereby at least partially solving the aforementioned problem.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A replaceable pin-type coded marker for a laser projection positioning system includes a target and a positioning pin that are detachably and fixedly connected to each other. The target is also provided with a coded reference point suitable for recognition by the laser projection positioning system.

[0008] In some preferred embodiments, the two opposite faces of the target are used to set the coding reference point and to connect the positioning pin, respectively.

[0009] In some preferred embodiments, the target and the locating pin are connected by threads.

[0010] In some preferred embodiments, the positioning pin includes a positioning platform and a connecting post coaxially connected to the positioning platform. The positioning platform is used to mate with a positioning hole on the workpiece, and the connecting post is provided with an external thread that matches the internal thread hole on the target.

[0011] In some preferred embodiments, the positioning pin further includes a frustum coaxially connected between the positioning platform and the connecting column, and the target is provided with a conical hole adapted to the frustum.

[0012] In some preferred embodiments, the target includes an encoding platform and a connecting platform coaxially connected to the encoding platform. The encoding platform is used to set the encoding reference point, and the connecting platform is used to connect to the positioning pin.

[0013] In some preferred embodiments, the encoding platform has a groove, the encoding reference point is disposed in the groove, and the groove is covered with a protective cover made of transparent material.

[0014] In some preferred embodiments, the encoder platform is further provided with a skid slot connected to the groove.

[0015] In some preferred embodiments, the side wall of the connecting platform is provided with a platform for easy twisting.

[0016] In some preferred embodiments, the encoding reference point includes one or more of text, characters, and patterns.

[0017] The beneficial effects of this utility model by adopting the above technical solution are as follows: By making the target and the positioning pin detachable, only one set of targets (several targets each with all the coding reference points) and one set of positioning pins (positioning pins with different diameters) are needed. When using, they can be flexibly assembled according to the size of the positioning hole on the workpiece and the required coding reference points, thereby reducing the number of spare parts and saving the cost of use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model in another direction.

[0020] Figure 3 This is a schematic diagram of the target structure in this utility model.

[0021] Figure 4 This is a cross-sectional view of the target in this utility model.

[0022] Figure 5 This is a schematic diagram of the positioning pin in this utility model.

[0023] Figure 6 This is a schematic diagram of some of the coding reference points in this utility model.

[0024] In the diagram: 1-target, 11-encoder platform, 12-connector platform, 13-platform, 2-positioning pin, 21-positioning platform, 22-connecting column, 23-cone, 3-groove, 4-protective cover, 5-skid slot, 6-internal threaded hole, 7-cone hole. Detailed Implementation

[0025] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0026] A replaceable pin-type coded marker for a laser projection positioning system, such as Figure 1-5 As shown, it includes a target 1 and a positioning pin 2 that are detachably and fixedly connected to each other. The target 1 is also provided with a coded reference point suitable for recognition by the laser projection positioning system.

[0027] The locating pin 2 is used to install in the locating hole on the workpiece. The locating pin 2 mainly consists of two parts: a locating platform 21 for mating with the locating hole on the workpiece and a connecting post 22 for connecting with the target 1. For example, when the locating hole on the workpiece is a round hole, the locating platform 21 is configured as a frustum. For example, when the target 1 and the locating pin 2 are fixed by a threaded connection, the connecting post 22 is configured as a stud with external threads. Usually, the diameter of the connecting post 22 is smaller than the diameter of the locating platform 21, and the two are coaxially connected and integrally formed.

[0028] The two opposite faces of target 1 are used to set the coding reference point and to connect the positioning pin 2, respectively.

[0029] The top surface of target 1 has a groove 3, which is roughly circular. Encoding reference points are located at the bottom of this groove 3. These reference points can be one or more of the following: text, characters, or patterns. They can be set by etching, transfer, spraying, or pasting (in the form of stickers). There are usually multiple and varied encoding reference points, such as... Figure 6 As shown, it usually includes numbers and patterns, and is distinguished by the position of the numbers, the style and position of the patterns, etc.

[0030] In some preferred embodiments, such as Figure 4As shown, the groove 3 is usually covered by a protective cover 4 made of transparent material, for example, the protective cover 4 is installed by a snap-fit ​​structure. In addition, the top surface of the target 1 also has a skid slot 5 connected to the groove. The skid slot 5 is arranged roughly in the radial direction of the groove. During disassembly, a skid tool (such as a long and sharp tool) is used to pry the protective cover out of the groove through the skid slot 5. Of course, it is easy to understand that the groove 3, the protective cover 4, and the skid slot 5 are not necessary. The coding reference point can be directly set on the top surface of the target 1.

[0031] The bottom surface of the target 1 is provided with an internal threaded hole 6, which is a blind hole. The internal threaded hole 6 is adapted to the external thread on the connecting column 22, so that the target 1 can be detachably connected to the positioning pin 2 by the thread.

[0032] The diameter of target 1 is typically configured to be larger than the diameter of positioning pin 2, so that target 1 can block positioning pin 2, ensuring that the laser projection positioning system is not affected by other irrelevant objects when observing target 1. Alternatively, target 1 can be configured with a stepped structure, for example, including an encoding platform 11 and a connecting platform 12 coaxially connected to the encoding platform 11. Both are circular and integrally formed. The diameter of encoding platform 11 is larger than the diameter of connecting platform 12. The top surface of encoding platform 11 is used to set the encoding reference point, and the bottom surface of connecting platform 12 is used to open the internal threaded hole 6. This allows for the reduction of the overall weight and material usage of target 1 while ensuring its usability.

[0033] The positioning pin 2 typically also includes a frustum 23 coaxially connected between the positioning platform 21 and the connecting post 22. The small end of the frustum 23 is connected to the connecting post 22, and both have the same diameter. The large end of the frustum 23 is connected to the positioning platform 21, and the diameter of the large end of the frustum 23 is smaller than the diameter of the positioning platform 21. Correspondingly, the bottom surface of the target 1 is provided with a tapered hole 7 that matches the frustum 23. This tapered hole 7 is located at the opening of the internal threaded hole 6. This arrangement ensures that when the positioning pin 2 is connected to the target 1, the connecting platform 12 and the positioning platform 21 do not directly contact each other, thereby avoiding the adsorption force between their mating surfaces that hinders separation. At the same time, the tapered mating surface ensures the positional assembly accuracy between the two.

[0034] The target 1 has a platform 13 on its circumferential sidewall for easy screwing. The platform 13 is planar and parallel to the axial direction of the target 1. Usually there are two or more platforms 13 and they are evenly distributed circumferentially. The platform 13 allows tools (such as wrenches) to clamp the target 1 and rotate it, thereby connecting or separating the target 1 and the positioning pin 2.

[0035] It is easy to understand that, as another way to achieve a threaded connection between the target 1 and the locating pin 2, the external thread can be set on the target 1 and the internal threaded hole can be set on the locating pin 2.

[0036] Compared with the prior art, this utility model embodiment allows the target 1 and the positioning pin 2 to be detachably connected. Without considering the reuse of the coding mark points, only one set of target 1 (several target 1s each with all coding reference points) and one set of positioning pins 2 (positioning pins 2 with different diameters) are needed. When in use, they can be flexibly assembled according to the size of the positioning hole on the workpiece and the required coding reference points, thereby reducing the number of spare parts and saving the cost of use.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is clear to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

[0038] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the description of the structure of this utility model shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The terms "first" and "second" in this technical solution are merely designations for corresponding structures that are identical or similar, or that perform similar functions. They do not represent an arrangement of the importance of these structures, nor do they imply any ranking, comparison of size, or other meaning.

[0040] Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structures. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the overall concept and the specific context of the solution.

Claims

1. A replaceable pin-type coded marker for a laser projection positioning system, characterized in that: It includes a target and a positioning pin that are detachably and fixedly connected to each other, and the target is also provided with coded reference points suitable for recognition by a laser projection positioning system.

2. The replaceable pin-type coded marker for a laser projection positioning system according to claim 1, characterized in that: The two opposite faces of the target are used to set the coding reference point and to connect the positioning pin, respectively.

3. The replaceable pin-type coded marker for a laser projection positioning system according to claim 2, characterized in that: The target and the positioning pin are connected by threads.

4. The replaceable pin-type coded marker for a laser projection positioning system according to claim 3, characterized in that: The positioning pin includes a positioning platform and a connecting column coaxially connected to the positioning platform. The positioning platform is used to cooperate with the positioning hole on the workpiece, and the connecting column is provided with an external thread that is adapted to the internal thread hole on the target.

5. The replaceable pin-type coded marker for a laser projection positioning system according to claim 4, characterized in that: The positioning pin also includes a frustum coaxially connected between the positioning platform and the connecting column, and the target is provided with a conical hole that is adapted to the frustum.

6. The replaceable pin-type coded marker for a laser projection positioning system according to claim 3, characterized in that: The target includes an encoding platform and a connecting platform coaxially connected to the encoding platform. The encoding platform is used to set the encoding reference point, and the connecting platform is used to connect to the positioning pin.

7. The replaceable pin-type coded marker for a laser projection positioning system according to claim 6, characterized in that: The encoding platform has a groove, the encoding reference point is set in the groove, and the groove is covered with a protective cover made of transparent material.

8. The replaceable pin-type coded marker for a laser projection positioning system according to claim 7, characterized in that: The encoder platform is also provided with a skid slot connected to the groove.

9. The replaceable pin-type coded marker for a laser projection positioning system according to claim 6, characterized in that: The side wall of the connecting platform is provided with a platform for easy screwing.

10. The replaceable pin-type coded marker for a laser projection positioning system according to claim 1, characterized in that: The encoding reference point includes one or more of the following: text, characters, and patterns.

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