Stele carving model establishing device and system based on three-dimensional laser scanning technology

Abstract

The invention discloses an inscription model establishing device and system based on a three-dimensional laser scanning technology, and relates to the field of three-dimensional scanning, the inscription model establishing device comprises a first track, one end of the first track is connected with a driving mechanism, and the other end of the first track is rotatably connected with a second track through a connecting piece; a transmission mechanism is arranged through the first track and the second track, and the transmission mechanism is connected with the driving mechanism; and one end of the scanning support arm is movably arranged in the first track and the second track and is connected with the transmission mechanism, and the other end of the scanning support arm is slidably provided with a scanner. The first track and the second track of the inscription device can be folded and stored through the connecting piece, the occupied space of the device is reduced, and carrying is convenient; meanwhile, the transmission mechanism can be matched with the first track and the second track to complete folding, and driving of the scanning supporting arm is not affected after folding and unfolding.

Description

Technical Field

[0001] The present invention relates to the field of three-dimensional scanning, and specifically to a device and system for establishing a stele model based on three-dimensional laser scanning technology. Background Art

[0002] China's stele inscription culture has a long history, dating back to the Warring States period, such as the Qin石鼓 and the Stele of Supervising the Hunting Ground of the Zhongshan State. Ancient Chinese steles, which are erected on the ground as permanent memorials or markers, are mostly called steles; those engraved with characters are called stele inscriptions. It is generally believed that those with a round top and larger at the bottom are called jie, and those with a vertical rectangular shape are called steles; however, some horizontally rectangular engraved stones such as the Kaicheng Stone Classics, or cliff inscriptions directly engraved on the cliffs, are also often classified into the category of stele inscriptions. Since the Eastern Han Dynasty, a large number of steles engraved with characters have emerged, which were commonly used in front of the palace, for observing and recording time, or erected in front of the tomb, recording the name, life story, and burial time of the deceased, for praising merits, writing biographies, and纪事. The uses of later steles have gradually increased, integrating calligraphy, seal carving, literature, and celebrity culture, and having important historical, cultural, and collection values. With the continuous development of computer science and surveying and mapping technology, the work of retaining the three-dimensional spatial information of ancient Chinese steles has also entered the digital age. The application of photogrammetry technology and three-dimensional laser scanning technology has provided a new technical means for the work of retaining the three-dimensional spatial information of steles.

[0003] However, the three-dimensional scanning laser scanning technology equipment in the prior art is large and bulky, not convenient to carry out, and the existing three-dimensional scanning equipment usually needs to adjust the position of the stele, which is likely to cause damage to the stele when adjusting, resulting in the loss of stele inscriptions.

[0004] In view of the above problems, the present invention provides a device and system for establishing a stele model based on three-dimensional laser scanning technology to solve the above problems. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solutions: A device and system for establishing a stele model based on three-dimensional laser scanning technology, comprising:

[0006] A first track, one end of which is connected to a driving mechanism, and the other end is rotatably connected to a second track through a connecting member. A transmission mechanism is installed through the first track and the second track, and the transmission mechanism is connected to the driving mechanism;

[0007] A scanning support arm, one end of which is movably arranged in the first track and the second track and is connected to the transmission mechanism, and the other end of the scanning support arm is slidably provided with a scanner.

[0008] Further, preferably, the first track and the second track have the same structure, including:

[0009] A housing, wherein a slide rail and a transmission compartment are provided inside the housing; a scanning arm is movably provided inside the slide rail;

[0010] A fixed collar has one end fixed in the transmission bin and the other end connected to the transmission mechanism.

[0011] Further, preferably, the transmission mechanism comprises:

[0012] A first lead screw and a second lead screw are rotatably arranged in the transmission bin through the fixed collar, and the scanning arm is connected to the first lead screw and the second lead screw through threads;

[0013] A transmission connection assembly, one end of which is connected to the first lead screw, and the other end of which is connected to the second lead screw;

[0014] A bevel gear assembly, an input end of which is connected to the driving mechanism, and an output end of which is connected to the first lead screw.

[0015] Further, preferably, the driving mechanism includes: a telescopic protective shell, one end of the telescopic protective shell is fixed on the first track, and a motor is arranged at the other end; a telescopic transmission rod is rotatably arranged in the telescopic protective shell, one end of the telescopic transmission rod is connected to the output end of the motor, and the other end is connected to the input end of the bevel gear assembly.

[0016] Further, preferably, the transmission connection assembly includes:

[0017] A first connecting screw, one end of which is fixed to the first screw and the other end of which is provided with a locking groove;

[0018] The second connecting screw has one end fixed on the second screw and the other end provided with a clamping platform, and the clamping platform is clamped with the clamping groove.

[0019] Further, preferably, the scanning arm comprises:

[0020] A rolling wheel is rollingly arranged in the slide rail, and a transmission nut is arranged at one end of the rolling wheel and a sliding support arm is arranged at the other end; the transmission nut is arranged on the first lead screw and the second lead screw through a threaded connection; the scanner is slidingly arranged on the sliding support arm.

[0021] Further, preferably, an avoidance groove is provided on the transmission nut, and the width of the avoidance groove is greater than the width of the fixing ring.

[0022] A system for establishing a stele model based on three-dimensional laser scanning technology, characterized in that it comprises the following steps:

[0023] S1, import the inscription model scanned by the scanner;

[0024] S2, generating a fitting projection surface from the stele model;

[0025] S3, calculating the vertex depth of the fitting projection surface;

[0026] S4, calculating the vertex grayscale values ​​of the fitted projection surface;

[0027] S5, generating a digital rubbing of the fitted projection surface by calculating the vertex depth and the vertex gray value;

[0028] S6. Manually determine whether the digital rubbing meets the requirements. If it does not meet the requirements, repeat steps S3 to S5. If it meets the requirements, export the generated digital rubbing.

[0029] Compared with the prior art, the present invention provides a device and system for establishing a stele model based on three-dimensional laser scanning technology, which has the following beneficial effects:

[0030] The first guide rail and the second guide rail can be folded under the action of the connecting piece, which reduces the space volume of the device and makes it convenient to carry or store. At the same time, a transmission connection component is arranged so that after the first guide rail and the second guide rail are folded and unfolded, the first lead screw and the second lead screw can still be synchronously transmitted, thereby ensuring that the scanner can perform normal automatic scanning of the inscriptions on the stone tablet. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Establish an overall schematic diagram of the device for a stele model based on 3D laser scanning technology;

[0032] Figure 2 A lateral structural diagram of a device was established for a stele model based on 3D laser scanning technology;

[0033] Figure 3 Establish a transmission mechanism connection diagram for a stele model based on 3D laser scanning technology;

[0034] Figure 4 Establish a schematic diagram of the device connector for a stele model based on 3D laser scanning technology;

[0035] Figure 5 A schematic diagram of the first track structure of a device for building a stele model based on three-dimensional laser scanning technology;

[0036] Figure 6 This is an enlarged schematic diagram of a device for building a stele model based on three-dimensional laser scanning technology;

[0037] Figure 7 A schematic diagram of the transmission connection components of a device for establishing a stele model based on 3D laser scanning technology;

[0038] Figure 8 Establish a system flow chart for a stele model based on 3D laser scanning technology.

[0039] In the figure: 1. connecting part; 2. driving mechanism; 3. motor; 4. first track; 41. housing; 43. slide rail; 44. transmission compartment; 5. second track; 6. scanning arm; 61. rolling wheel; 62. transmission nut; 7. scanner; 8. transmission mechanism; 81. first lead screw; 82. second lead screw; 83. transmission connection assembly; 831. second connecting lead screw; 832. first connecting lead screw; 84. bevel gear assembly; 86. telescopic transmission rod. DETAILED DESCRIPTION

[0040] Reference Figures 1 to 8 The present invention provides a technical solution: a device for establishing a stele model based on three-dimensional laser scanning technology, comprising:

[0041] A first track 4, one end of which is connected to the driving mechanism 2, and the other end of which is rotatably connected to the second track 5 via a connecting member 1, a transmission mechanism 8 is installed through the first track 4 and the second track 5, and the transmission mechanism 8 is connected to the driving mechanism 2;

[0042] One end of the scanning arm 6 is movably arranged in the first track 4 and the second track 5 and connected to the transmission mechanism 8 , and the other end of the scanning arm 6 is slidably arranged with a scanner 7 .

[0043] The length of the driving mechanism 2 and the scanner 7 are adjusted according to the width of the stele. After the adjustment of the driving mechanism 2 and the scanner 7 is completed, the second track 5 and the first track 4 are rotated and unfolded through the connecting member 1, and finally the universal wheel is locked to keep the relative position of the scanner 7 and the stele stable.

[0044] After completing the above adjustments, the driving mechanism 2 is started to drive the transmission mechanism 8, so that the scanning arm 6 moves within the first track 4 and the second track 5. During the movement of the scanning arm 6, the scanner 7 scans the inscriptions on the stone tablet.

[0045] As a preferred embodiment, the first track 4 and the second track 5 have the same structure, including:

[0046] A housing 41, wherein a slide rail 43 and a transmission compartment 44 are provided inside the housing 41; a scanning arm 6 is movably provided inside the slide rail 43;

[0047] A fixed collar has one end fixed in the transmission compartment 44 and the other end connected to the transmission mechanism 8 .

[0048] As a preferred embodiment, the transmission mechanism 8 includes:

[0049] A first lead screw 81 and a second lead screw 82 are rotatably arranged in the transmission chamber 44 through the fixed collar, and the scanning arm 6 is connected to the first lead screw 81 and the second lead screw 82 through threads;

[0050] A transmission connection assembly 83, one end of which is connected to the first lead screw 81, and the other end of which is connected to the second lead screw 82;

[0051] The bevel gear assembly 84 has an input end connected to the driving mechanism 2 and an output end connected to the first lead screw 81 .

[0052] It needs to be explained that the driving mechanism 2 drives the first lead screw 81 through the bevel gear assembly 84, and the first lead screw 81 causes the second lead screw 82 to rotate synchronously through the transmission connection assembly 83. During the synchronous rotation of the first lead screw 81, the transmission connection assembly 83 and the second lead screw 82, the scanning arm 6 moves on the slide rail 43, so that the scanner 7 scans and records the inscriptions.

[0053] Under the action of the transmission connection assembly 83, the first lead screw 81 and the second lead screw 82 can be folded along with the first track 4 and the second track 5, so that after completing the scanning of the stele, the second track 5 can be rotated through the connecting member 1 to be stacked on the first track 4, thereby effectively reducing the spatial volume of the device and facilitating carrying and storage.

[0054] As a preferred embodiment, the driving mechanism 2 includes: a telescopic protective shell, one end of which is fixed on the first track 4, and the other end is provided with a motor 3; a telescopic transmission rod 86 is rotatably arranged in the telescopic protective shell, one end of the telescopic transmission rod 86 is connected to the output end of the motor 3, and the other end is connected to the input end of the bevel gear assembly 84.

[0055] It should be noted that, by providing the telescopic protective shell and the telescopic transmission rod 86 , it can be reasonably adjusted according to the width of the stele, and the telescopic protective shell is used to improve the overall stability and ensure the accuracy of the scanning data of the scanner 7 .

[0056] When the telescopic protective shell changes its length, the telescopic transmission rod 86 can ensure that the transmission of the motor 3 is effectively transmitted to the bevel gear assembly 84, thereby ensuring the continuity of the transmission.

[0057] As a preferred embodiment, the transmission connection assembly 83 includes:

[0058] A first connecting screw 832, one end of which is fixed to the first screw 81 and the other end of which is provided with a locking groove;

[0059] One end of the second connecting screw 831 is fixed on the second screw 82, and the other end is provided with a clamping platform, and the clamping platform is clamped with the clamping groove.

[0060] It should be noted that when the first rail 4 and the second rail 5 are folded, the engaging platform of the second connecting screw 831 is disconnected from the engaging groove of the first connecting screw 832, so that it can be folded portably; after the first rail 4 and the second rail 5 are unfolded, the engaging platform is engaged with the engaging groove, so that the first screw 81 and the second screw 82 can rotate synchronously.

[0061] As a preferred embodiment, the scanning arm 6 comprises:

[0062] The rolling wheel 61 is rollingly arranged in the slide rail 43, and a transmission nut 62 is arranged at one end of the rolling wheel 61, and a sliding support arm is arranged at the other end; the transmission nut 62 is arranged on the first lead screw 81 and the second lead screw 82 through a threaded connection; the scanner 7 is slidingly arranged on the sliding support arm.

[0063] As a preferred embodiment, an avoidance groove is provided on the driving nut 62, and the width of the avoidance groove is greater than the width of the fixing ring, so that when the driving nut 62 encounters the fixing ring, it can avoid it through the avoidance groove to prevent the occurrence of jamming.

[0064] It should be noted that by starting the motor 3 and using the bevel gear assembly 84, the first lead screw 81, the transmission connection assembly 83 and the second lead screw 82 are rotated synchronously. During the rotation of the first lead screw 81, the transmission connection assembly 83 and the second lead screw 82, the transmission nut 62 is used to make the rolling wheel 61 roll in the slide rail 43, so that the sliding arm drives the scanner 7 to scan and record the inscriptions on the stone tablet.

[0065] It should be noted that when the stone tablet needs to be scanned back and forth, it is only necessary to change the direction of the motor 3 .

[0066] A system for establishing a stele model based on three-dimensional laser scanning technology, characterized in that it comprises the following steps:

[0067] S1, importing the inscription model scanned by scanner 7;

[0068] S2, generating a fitting projection surface from the stele model;

[0069] S3, calculating the vertex depth of the fitting projection surface;

[0070] S4, calculating the vertex grayscale values ​​of the fitted projection surface;

[0071] S5, generating a digital rubbing of the fitted projection surface by calculating the vertex depth and the vertex gray value;

[0072] S6. Manually determine whether the digital rubbing meets the requirements. If it does not meet the requirements, repeat steps S3 to S5. If it meets the requirements, export the generated digital rubbing.

[0073] During specific implementation, the positions of the telescopic protective shell and the scanner 7 are adjusted according to the width of the stele, and whether the first slide rail 4 and the second slide rail 5 need to be unfolded is determined according to the length of the stele, so that the scanner 7 can stably scan and record the inscriptions on the stele.

[0074] The stele model obtained by scanner 7 is used to generate a fitting projection surface, and the vertex depth and vertex grayscale value are calculated. A digital rubbing is generated through the vertex grayscale value and vertex depth. The digital rubbing is manually inspected. If it meets the requirements, the digital rubbing can be exported. If it does not meet the requirements, S3-S5 are repeated until the generated digital rubbing meets the requirements and can be exported.

[0075] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for establishing a stele model based on three-dimensional laser scanning technology, characterized in that: include: A first track (4), one end of the first track (4) is connected to the driving mechanism (2), and the other end is rotatably connected to the second track (5) through a connecting member (1), a transmission mechanism (8) is installed through the first track (4) and the second track (5), and the transmission mechanism (8) is connected to the driving mechanism (2); One end of the scanning arm (6) is movably arranged in the first track (4) and the second track (5) and is connected to the transmission mechanism (8); the other end of the scanning arm (6) is slidably arranged with a scanner (7).

2. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 1, characterized in that: The first track (4) and the second track (5) have the same structure, including: A housing (41), wherein a slide rail (43) and a transmission compartment (44) are provided inside the housing (41); a scanning arm (6) is movably provided inside the slide rail (43); A fixed collar has one end fixed in the transmission bin (44) and the other end connected to the transmission mechanism (8).

3. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 2 is characterized in that: The transmission mechanism (8) comprises: A first lead screw (81) and a second lead screw (82) are rotatably arranged in the transmission chamber (44) via the fixing ring, and the scanning arm (6) is connected to the first lead screw (81) and the second lead screw (82) via threads; A transmission connection assembly (83), one end of which is connected to the first lead screw (81), and the other end of which is connected to the second lead screw (82); A bevel gear assembly (84) has an input end connected to the driving mechanism (2) and an output end connected to the first lead screw (81).

4. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 3 is characterized in that: The driving mechanism (2) comprises: a telescopic protective shell, one end of which is fixed on the first track (4), and the other end of which is provided with a motor (3); a telescopic transmission rod (86) is rotatably arranged in the telescopic protective shell, one end of which is connected to the output end of the motor (3), and the other end of which is connected to the input end of the bevel gear assembly (84).

5. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 3 is characterized in that: The transmission connection assembly (83) comprises: A first connecting screw (832), one end of which is fixed to the first screw (81) and the other end of which is provided with a locking groove; One end of the second connecting screw (831) is fixed on the second screw (82), and the other end is provided with a clamping platform, and the clamping platform is clamped with the clamping groove.

6. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 3 is characterized in that: The scanning support arm (6) comprises: A rolling wheel (61) is rollingly arranged in the slide rail (43), and a transmission nut (62) is arranged at one end of the rolling wheel (61), and a sliding support arm is arranged at the other end; the transmission nut (62) is arranged on the first lead screw (81) and the second lead screw (82) through a threaded connection; and the scanner (7) is slidingly arranged on the sliding support arm.

7. The device for establishing a stele model based on three-dimensional laser scanning technology according to claim 6 is characterized in that: The transmission nut (62) is provided with an escape groove, and the width of the escape groove is greater than the width of the fixing ring.

8. A system for establishing a stele model based on three-dimensional laser scanning technology, characterized in that: The following steps are involved: S1, importing the inscription model scanned by the scanner (7); S2, generating a fitting projection surface from the stele model; S3, calculating the vertex depth of the fitting projection surface; S4, calculating the vertex grayscale values ​​of the fitted projection surface; S5, generating a digital rubbing of the fitted projection surface by calculating the vertex depth and the vertex gray value; S6. Manually determine whether the digital rubbing meets the requirements. If it does not meet the requirements, repeat steps S3 to S5. If it meets the requirements, export the generated digital rubbing.

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