Laser module based on three-dimensional scanner and scanner
By using multi-line same-color lasers and multi-line blue/infrared lasers to trigger the cross lasers in turn in the 3D scanner, the problem of low scanning efficiency in the existing technology is solved, and a more efficient scanning effect is achieved and the scanning requirements of different distances are adapted.
Patent Information
- Application Number
- CN202423149638.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-19
AI Technical Summary
When the laser module of an existing three-dimensional structure scanner uses a cross laser consisting of two parallel lasers for scanning, the scanning efficiency is low and the number of effective frames is only half of all frames.
A cross laser consisting of at least three multi-line same-color lasers is used to trigger scanning in turn, and multi-line blue and infrared lasers are set in the laser module to meet the needs of short-range and long-range scanning, combined with continuously triggered multi-line or single-line blue lasers to adapt to different scanning scenarios.
Improved scanning efficiency, increased the number of effective frames, suitable for more complex scanning scenarios, and increased scanning speed for close and long distances.
Smart Images
Figure CN223485133U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of 3D scanner technology, specifically to a laser module and scanner based on a 3D scanner. Background Technology
[0002] like Figure 2 As shown, the laser module of existing 3D structure scanners is usually composed of two blue multi-line parallel lasers forming a cross laser. The cross laser polls and triggers to achieve rapid scanning of the object to be scanned.
[0003] However, in existing solutions, when using a cross-laser consisting of two parallel lasers to trigger scanning in turn, each cycle consists of two frames. When the device scans in the direction parallel to the laser triggered in the first frame, the resulting image is a linear, inefficient image. But in the second frame scan, it will inevitably form an angle with the second parallel laser, thus obtaining a planar scan image. Therefore, using a cross-laser consisting of two parallel lasers for 3D scanning, in some cases, only half of the total number of effective frames are obtained, resulting in extremely low scanning efficiency. Utility Model Content
[0004] To address the aforementioned shortcomings of existing technologies, a laser module and scanner based on a 3D scanner are provided, which improves the scanning efficiency and speed of the laser module at different distances.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0006] In the first aspect, a laser module based on a 3D scanner is mounted on the frame of the 3D scanner, and the laser module includes at least one first sub-module;
[0007] The first submodule includes at least three multi-line monochromatic lasers, which are configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned; the laser lines of all multi-line monochromatic lasers in the projection area are at a certain angle to each other.
[0008] Within one cycle, the lasers of the same color in the first submodule are triggered in turn.
[0009] According to the above technical solution, the multi-line same-color laser is a multi-line infrared laser or a multi-line blue laser.
[0010] According to the above technical solution, the laser module includes two first sub-modules. The first first sub-module includes at least three multi-line blue lasers, and the second first sub-module includes at least three multi-line infrared lasers.
[0011] According to the above technical solution, the laser module includes a first sub-module and a second sub-module. The first sub-module contains at least three multi-line blue lasers.
[0012] The second submodule contains two multi-line infrared lasers, which are configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned. The laser lines of the two multi-line infrared lasers are at a certain angle in the projection area. Within the same cycle, the two multi-line infrared lasers are triggered in turn.
[0013] According to the above technical solution, the laser module also includes a third sub-module, which includes at least one continuously triggered multi-line blue laser, or one continuously triggered single-line blue laser, or a vertical cavity surface-emitting laser.
[0014] According to the above technical solution, the laser module includes four alternately triggered blue lasers, two alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser; the alternately triggered multi-line blue laser and multi-line infrared laser total six lasers, arranged in three rows and two columns; the continuously triggered single-line blue laser and multi-line blue laser are respectively located at the center of the top two rows and the center of the bottom two rows, or respectively located at the center of the bottom two rows and the center of the top two rows.
[0015] According to the above technical solution, the laser module includes four alternately triggered blue lasers, four alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser; all lasers are arranged in four rows, with each row containing 2, 3, 3, and 2 lasers respectively; the continuously triggered single-line blue laser and multi-line blue laser are located in the middle of the second and third rows respectively, or in the middle of the third and second rows respectively.
[0016] Secondly, the scanner includes a frame, a laser module as described above, and two image acquisition components, both of which are mounted on the frame; the laser module emits a beam of light, which is reflected by the workpiece and finally captured by the image acquisition components.
[0017] According to the above technical solution, the image acquisition components are located on both sides of the laser module.
[0018] This utility model has the following beneficial effects:
[0019] 1. When scanning is performed using a cross-laser system composed of at least three multi-line homochromatic lasers, the laser lines of the at least three multi-line homochromatic lasers are at a certain angle to each other. A cycle is defined as the number of frames equal to the number of multi-line homochromatic lasers in the corresponding submodule. When the device scans in the direction parallel to one of the lasers, a low-efficiency image is obtained. However, in the remaining frames within the cycle, a planar scan image is obtained. In this case, the number of effective frames obtained is the total number of frames. Where n represents the number of multi-line, same-color lasers in the corresponding submodule. Therefore, the laser module configuration in this application improves the overall scanning efficiency.
[0020] 2. Two first sub-modules are set up in the laser module, which respectively adopt multi-line blue laser and multi-line infrared laser to meet the needs of rapid scanning operations at both close and long distances.
[0021] 3. By setting one, two, or all of the continuously triggered multi-line blue laser, a continuously triggered single-line blue laser, or a vertical cavity surface-emitting laser within the laser module, the laser modes of the laser module are increased, making the laser module suitable for more and more complex scanning scenarios.
[0022] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description
[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.
[0024] Figure 1 It is a schematic diagram of the projection of the laser line tip on the surface of an object by a blue multi-line parallel laser.
[0025] Figure 2 This is a schematic diagram of the laser line projection onto the surface of an object using a cross laser composed of two parallel lasers in the prior art.
[0026] Figure 3 This is a schematic diagram of the arrangement of a laser module according to a preferred embodiment of the present invention;
[0027] Figure 4 This is a schematic diagram of the laser line projection on the surface of an object, showing a cross laser composed of four parallel lasers according to a preferred embodiment of this utility model.
[0028] In the diagram, 1 is a multi-line infrared laser; 2 is a multi-line blue laser; 3 is a continuously triggered multi-line blue laser; and 4 is a continuously triggered single-line blue laser. Detailed Implementation
[0029] The following is combined with Figure 1 , 3 Section 4 describes the principles and features of this utility model. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.
[0030] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0032] In existing technologies, when scanning is performed using a cross-laser consisting of two parallel lasers that trigger alternately, if each cycle consists of two frames, when the device scans in the direction parallel to the laser emitted by the first frame, the resulting image is a linear, inefficient image. However, in the second frame scan, an angle will always be formed with the second parallel laser, resulting in a planar scan image. Therefore, scanning in any direction with the cross-laser will always produce a planar image. Consequently, when using existing laser modules for scanning, the number of effective frames obtained when scanning in a direction parallel to the laser emitted by a particular laser is only half of the total number of frames.
[0033] Therefore, refer to Figures 3-4 As shown, this utility model provides a laser module based on a 3D scanner.
[0034] The laser module is mounted on the rack of the 3D scanner and includes at least one first sub-module. The first sub-module includes at least three multi-line monochromatic lasers configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned; the laser lines from all multi-line monochromatic lasers within the projection area are at a certain angle to each other. Within one cycle, the monochromatic lasers in the first sub-module are triggered sequentially in turn.
[0035] In this embodiment, when scanning is performed using a cross-laser system composed of at least three multi-line homochromatic lasers, the laser lines of the at least three multi-line homochromatic lasers are at a certain angle to each other. A cycle is defined as the number of frames equal to the number of multi-line homochromatic lasers in the corresponding submodule. When the device scans in the direction parallel to one of the lasers, a low-efficiency image is obtained. However, in the remaining frames within the cycle, a planar scan image is obtained. In this case, the number of effective frames obtained is the total number of frames. Where n represents the number of multi-line, same-color lasers in the corresponding submodule. Therefore, the laser module configuration in this application improves the overall scanning efficiency.
[0036] In Example 1, the multi-line monochromatic laser is either a multi-line infrared laser 1 or a multi-line blue laser 2. The working principle of the infrared cross-laser is the same as that of the blue cross-laser, but compared to the blue laser, the infrared laser has a longer wavelength. Longer wavelength light experiences less scattering and absorption during propagation, and the scattering effect of infrared light is smaller. Therefore, under the same conditions, infrared light can propagate farther, enabling the infrared cross-laser to quickly scan objects at greater distances. Thus, if the multi-line monochromatic laser is a multi-line blue laser, it is used for rapid scanning at close range; if the multi-line monochromatic laser is a multi-line infrared laser, it is used for rapid scanning at long distances.
[0037] The laser lines of the multi-line homochromatic laser use DOE optical diffraction elements to diffract a single laser line into multiple parallel laser lines. Theoretically, any laser with more than 2 lines can be called a multi-line laser.
[0038] Based on the above implementation methods, multiple implementation examples are provided:
[0039] First type of embodiment:
[0040] Depending on the requirements, two laser modules can be set on the scanner, each laser module including a first sub-module; one laser module includes at least three multi-line blue lasers for close-range fast scanning, and one laser module includes at least three multi-line infrared lasers for long-range fast scanning.
[0041] Second type of embodiment:
[0042] A laser module can be set on the scanner as needed; the laser module contains two first sub-modules, the first first sub-module contains at least three multi-line blue lasers, and the second first sub-module contains at least three multi-line infrared lasers.
[0043] Third type of embodiment:
[0044] A laser module can be installed on the scanner as needed. The laser module includes a first submodule and a second submodule. The first submodule contains at least three multi-line blue lasers. In this embodiment, the laser module is further equipped with a second submodule, which contains two multi-line infrared lasers. The multi-line infrared lasers are configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned. The laser lines of the two multi-line infrared lasers are at a certain angle in the projection area. Within the same cycle, the two multi-line infrared lasers are triggered sequentially in turn.
[0045] Fourth type of embodiment:
[0046] A laser module can be installed on the scanner as needed; the laser module includes a first sub-module, which contains at least three multi-line blue lasers. The laser module is used only for close-range, high-speed scanning.
[0047] Fifth type of embodiment:
[0048] A laser module can be installed on the scanner as needed; the laser module includes a first sub-module, which contains at least three multi-line infrared lasers. The laser module is only used for long-distance, high-speed scanning.
[0049] In embodiments 1-5, to expand the functionality of the laser module and enable it to be used for fine scanning and deep-hole scanning, the laser module may further include a third submodule. The third submodule may include at least one continuously triggered multi-line blue laser 3, or one continuously triggered single-line blue laser 4, or a vertical-cavity surface-emitting laser (VCSEL). Alternatively, the third submodule may contain only one of the following: one continuously triggered multi-line blue laser, one continuously triggered single-line blue laser, or a VCSEL. Another option is to include any two of the following: one continuously triggered multi-line blue laser, one continuously triggered single-line blue laser, or a VCSEL. Finally, the third submodule may include one continuously triggered multi-line blue laser, one continuously triggered single-line blue laser, and a VCSEL.
[0050] While the continuously triggered multi-line blue laser lacks the multi-directional, rapid scanning advantage of the cross-laser in the first submodule, it is suitable for high-density, fine-grained scanning of smaller objects. The cross-laser in the first submodule requires polling multiple lasers, while the continuously triggered multi-line blue laser fires continuously. In scanning object details, at the same trigger frame rate, triggering the cross-laser in the first submodule once can trigger the continuously triggered multi-line blue laser multiple times. Therefore, the scanning density using the continuously triggered multi-line blue laser is many times higher than that using the cross-laser in the first submodule.
[0051] Continuously triggered single-line blue lasers do not require grating for splitting, and single-line lasers have higher brightness, making them suitable for scanning small objects with insufficient light, such as deep holes.
[0052] Vertical cavity surface-emitting lasers are used for beam matching. By identifying the beam position, scanning data is calculated for speckle reconstruction.
[0053] Based on the second type of embodiment, a preferred and specific composition and structural form of the laser module is given. The laser module includes four alternately triggered blue lasers, four alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser. All lasers are arranged in four rows, with each row containing 2, 3, 3, and 2 lasers respectively. The continuously triggered single-line blue laser and multi-line blue laser are located in the middle of the second and third rows, respectively, or in the middle of the third and second rows, respectively.
[0054] Based on the third type of embodiment, a preferred and specific composition and structural form of a laser module is given. The laser module includes four alternately triggered blue lasers, two alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser. The alternately triggered multi-line blue laser and multi-line infrared laser total six lasers, arranged in three rows and two columns. The continuously triggered single-line blue laser and multi-line blue laser are respectively located at the center of the upper two rows and the center of the lower two rows, or respectively located at the center of the lower two rows and the center of the upper two rows.
[0055] This utility model also provides a scanner, including a frame, a laser module as described above, and two image acquisition components, both of which are mounted on the frame; the laser module emits a beam of light, which is reflected by the workpiece and finally captured by the image acquisition components.
[0056] The image acquisition components are located on both sides of the laser module.
[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A laser module based on a 3D scanner, wherein the laser module is mounted on the frame of the 3D scanner, characterized in that: The laser module includes at least one first sub-module; The first submodule includes at least three multi-line monochromatic lasers configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned. All multi-line same-color lasers produce laser lines in the projection area that form a certain angle between each pair of laser lines; Within one cycle, the lasers of the same color in the first submodule are triggered in turn.
2. The laser module based on a 3D scanner according to claim 1, characterized in that: The multi-line same-color laser is either a multi-line infrared laser or a multi-line blue laser.
3. The laser module based on a 3D scanner according to claim 1, characterized in that: The laser module comprises two first sub-modules. The first first sub-module contains at least three multi-line blue lasers, and the second first sub-module contains at least three multi-line infrared lasers.
4. The laser module based on a 3D scanner according to claim 1, characterized in that: The laser module includes a first submodule and a second submodule. The first submodule contains at least three multi-line blue lasers. The second submodule contains two multi-line infrared lasers, which are configured to emit lasers to project multiple parallel laser lines onto the surface of the object to be scanned. The laser lines of the two multi-line infrared lasers are at a certain angle in the projection area. Within the same cycle, the two multi-line infrared lasers are triggered in turn.
5. The laser module based on a 3D scanner according to claim 3 or 4, characterized in that: The laser module also includes a third submodule, which includes at least one continuously triggered multi-line blue laser, one continuously triggered single-line blue laser, or a vertical cavity surface-emitting laser.
6. The laser module based on a 3D scanner according to claim 5, characterized in that: The laser module includes four alternately triggered blue lasers, two alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser; the alternately triggered multi-line blue laser and multi-line infrared laser total six lasers, arranged in three rows and two columns; the continuously triggered single-line blue laser and multi-line blue laser are respectively located at the center of the top two rows and the center of the bottom two rows, or respectively located at the center of the bottom two rows and the center of the top two rows.
7. The laser module based on a 3D scanner according to claim 5, characterized in that: The laser module includes four alternately triggered blue lasers, four alternately triggered infrared lasers, one continuously triggered multi-line blue laser, and one single-line blue laser; all lasers are arranged in four rows, with each row containing 2, 3, 3, and 2 lasers respectively. The continuously triggered single-line blue laser and multi-line blue laser are located in the middle of the second and third rows, respectively, or in the middle of the third and second rows, respectively.
8. A scanner, characterized in that: It includes a frame, a laser module as described in any one of claims 1-7, and two image acquisition components, both of which are mounted on the frame; the laser module emits a beam of light, which is reflected by the workpiece and finally captured by the image acquisition components.
9. The scanner according to claim 8, characterized in that: The image acquisition components are located on both sides of the laser module.