Calibration device for three-dimensional scanner

Abstract

The utility model provides a calibration device for a three-dimensional scanner, which relates to the technical field of calibration and comprises a shell, a circuit board, a driving motor, a transmission mechanism, a calibration plate, an encoder, an infrared transmitter and an infrared receiver. The circuit board is installed on the shell, and the driving motor, the encoder, the infrared transmitter and the infrared receiver are all in communication connection with the circuit board; the driving motor and the transmission mechanism are installed on the shell. The transmission mechanism is connected with the driving motor and the calibration plate. The encoder is installed on the driving motor and used for obtaining the rotating angle of a rotating shaft of the driving motor. The infrared emitter and the infrared receiver are both installed on the shell, and the infrared receiver is used for receiving infrared rays emitted by the infrared emitter; the calibration plate can be located on the propagation path of infrared rays emitted by the infrared emitter in the linear reciprocating motion process. Automatic calibration is adopted, time and labor are saved, efficiency is high, errors are small, and calibration reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration, in particular to a calibration device for a three-dimensional scanner. Background Art

[0002] During long-term use, a 3D scanner, such as a dental digital impression system, can cause minor displacement of its internal precision components, affecting the accuracy of its 3D scanning operations. To ensure its accuracy, the system must be regularly calibrated. In the prior art, this is typically done manually by moving a calibration plate closer to or further away from the system.

[0003] The inventors discovered during their research that the calibration device of the prior art oral digital impression device has at least the following disadvantages:

[0004] Manual operation is labor-intensive, time-consuming and labor-intensive, and inefficient. In addition, many factors such as the operator's experience and the on-site environment have a great impact on the calibration results, resulting in large errors. Utility Model Content

[0005] The purpose of the present invention includes, for example, providing a calibration device for a three-dimensional scanner, which can realize automatic calibration, save time and labor, has high efficiency, and has small errors and high accuracy of calibration results.

[0006] The embodiment of the present utility model can be implemented as follows:

[0007] In a first aspect, the present invention provides a calibration device for a three-dimensional scanner, comprising:

[0008] A shell, a circuit board, a drive motor, a transmission mechanism, a calibration plate, an encoder, an infrared transmitter and an infrared receiver; the shell is used to position the three-dimensional scanner to be calibrated; the circuit board is installed in the shell, and the drive motor, encoder, infrared transmitter and infrared receiver are all communicatively connected to the circuit board; the drive motor and the transmission mechanism are both installed in the shell, and the transmission mechanism is simultaneously connected to the drive motor and the calibration plate, and the transmission mechanism is used to convert the rotational motion of the drive motor into the rotational motion and linear reciprocating motion of the calibration plate; the encoder is installed in the drive motor, and is used to obtain the rotation angle of the rotating shaft of the drive motor; the infrared transmitter and infrared receiver are both installed in the shell, and the infrared receiver is used to receive infrared rays emitted by the infrared transmitter; the calibration plate can be located on the propagation path of the infrared rays emitted by the infrared transmitter during the linear reciprocating motion.

[0009] In an optional embodiment, the transmission mechanism includes a transmission cylinder, a sliding rod and a threaded seat; the transmission cylinder is rotatably engaged with the shell, one end of the transmission cylinder is mounted on the rotating shaft of the drive motor, and the transmission cylinder and the rotating shaft are relatively fixed in the axial direction of the rotating shaft; the sliding rod and the transmission cylinder are slidably engaged in the axial direction of the transmission cylinder, and the two are relatively fixed in the circumferential direction of the transmission cylinder; the sliding rod is fixedly connected to the calibration plate; the threaded seat is fixed to the shell, the sliding rod passes through the threaded seat and the two are threadedly connected.

[0010] Based on this solution, when the drive motor is activated, it rotates the transmission cylinder, which in turn drives the sliding rod. The sliding rod is threadedly connected to the threaded seat, which is inconveniently fixed and does not rotate with the sliding rod. Therefore, the sliding rod can move back and forth linearly along its own axis under the guidance of the transmission cylinder. As the sliding rod rotates, it gradually approaches the 3D scanner to be calibrated, allowing calibration to be performed within a set distance. The calibration plate operates stably and reliably, and the calibration efficiency is high.

[0011] In an optional embodiment, the transmission cylinder is provided with a sliding cavity and a guide hole connected to the sliding cavity, the guide hole is a strip-shaped hole and the length direction of the guide hole is consistent with the axial direction of the transmission cylinder; an anti-rotation pin is provided on the sliding rod, the sliding rod is passed through the sliding cavity, and the anti-rotation pin is passed through the guide hole.

[0012] Based on the above scheme, the sliding rod relies on the sliding cavity for guidance and positioning, and the anti-rotation pin cooperates with the guide hole to also play a guiding and positioning role. In this way, the sliding rod and the transmission cylinder cooperate closely, and the sliding rod can perform stable linear motion along the axial direction of the transmission cylinder while rotating with the transmission cylinder. It is not easy to fall out of the transmission cylinder, and the failure rate is low.

[0013] In an optional embodiment, the calibration device for a three-dimensional scanner further includes an integrated seat, which is detachably connected to the shell; the driving motor, the transmission cylinder and the threaded seat are all fixed to the integrated seat.

[0014] Based on this solution, the drive motor, transmission cylinder, and threaded seat are all fixed to the integrated base. Multiple components rely on the integrated base for positioning and installation. This makes the assembly positions between the multiple components more accurate and reliable, and the fit is tighter, improving assembly quality. Furthermore, the multiple components are integrated together to form a module, enabling modular installation and disassembly, improving assembly and disassembly efficiency.

[0015] In an optional embodiment, the integrated seat includes a first side plate, a bottom plate and a second side plate connected in sequence, the first side plate and the second side plate are located on the same side of the bottom plate and are arranged relatively parallel, the first side plate is provided with a first positioning hole, the second side plate is provided with a second positioning hole, and the first positioning hole and the second positioning hole are coaxially arranged; the two ends of the transmission cylinder are respectively inserted into the first positioning hole and the second positioning hole, and the threaded seat is inserted into the second positioning hole and is located at the end of the transmission cylinder away from the first side plate.

[0016] Based on the above solution, the transmission cylinder and the threaded seat are installed and positioned by means of the first positioning hole and the second positioning hole, which is convenient for installation, and the transmission cylinder and the threaded seat have high coaxiality, which can improve the stability of the sliding rod movement.

[0017] In an optional embodiment, the infrared emitter is integrated on the circuit board, and the circuit board is mounted on the integration seat.

[0018] Based on the above solution, the position of the infrared emitter is stable and reliable, and the space occupied is small, the overall volume is small, and it is easy to install.

[0019] In an optional embodiment, the calibration device for the three-dimensional scanner further includes a positioning cylinder, the infrared receiver is mounted on the positioning cylinder, the positioning cylinder is mounted on the integrated seat, and the top of the positioning cylinder is provided with an avoidance through hole for the infrared rays emitted by the infrared transmitter to pass through; the calibration plate is located in the area enclosed by the positioning cylinder.

[0020] Based on the above solution, the positioning tube not only plays the role of installing and positioning the infrared receiver, but also can block the area around the infrared receiver, reducing the adverse effects of external light on the infrared receiver.

[0021] In an optional embodiment, a mounting hole is provided on the sliding rod, and the anti-rotation pin is screwed and fixed to the mounting hole.

[0022] Based on the above solution, the assembly method of the anti-rotation pin and the mounting hole is simple and reliable.

[0023] In an optional embodiment, the sliding rod includes an integrated smooth rod section and a threaded rod section, the threaded rod section is screwed and fixed to the threaded seat, and the mounting hole is provided on the smooth rod section.

[0024] Based on the above solution, the sliding rod slides within a set range. Therefore, external threads are only provided on a portion of the sliding rod. The rod section provided with external threads is the threaded rod section, which can reduce the thread processing area, reduce processing difficulty, and improve processing efficiency. In addition, providing mounting holes in the smooth rod section can improve the accuracy of the mounting hole processing position and reduce the processing difficulty of the mounting hole.

[0025] In an optional embodiment, there are multiple mounting holes, and the multiple mounting holes are spaced apart in the axial direction of the smooth rod segment. The anti-rotation pin can be selectively screwed and fixed to one of the multiple mounting holes.

[0026] Based on the above solution, by providing multiple mounting holes, the anti-rotation pin can be inserted into the corresponding mounting hole as needed, thereby adjusting the initial position of the anti-rotation pin in the guide hole and adjusting the range of motion of the sliding rod. That is, when the sliding rod drives the calibration plate close to the three-dimensional scanner to be calibrated, the anti-rotation pin moves with the sliding rod, and the anti-rotation pin can contact the wall of the guide hole close to the three-dimensional scanner to be calibrated, thereby limiting the continued movement of the sliding rod and preventing the calibration plate from colliding with the three-dimensional scanner to be calibrated. When the position of the anti-rotation pin is adjusted, the distance between the anti-rotation pin and the wall of the guide hole close to the three-dimensional scanner to be calibrated changes, thereby adjusting the displacement range of the sliding rod. It is flexible to use and can adapt to different scenarios.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] In summary, the calibration device for a three-dimensional scanner provided in this embodiment, when calibration is required, installs the three-dimensional scanner to be calibrated at one end of the housing, starts the power supply, and the infrared transmitter emits infrared rays. If the infrared rays are received by the infrared receiver, the information is then acquired by the circuit board, which controls the movement of the drive motor and drives the calibration plate back through the transmission mechanism. When the infrared rays emitted by the infrared transmitter cannot be received by the infrared receiver, the surface calibration plate returns to its initial position, thereby resetting the calibration plate. Then, the circuit board controls the drive motor to rotate in the opposite direction, and the transmission mechanism drives the calibration plate close to the three-dimensional scanner to be calibrated. During the calibration process, the encoder acquires the angle of rotation of the drive motor's rotating shaft in real time. Since the axial displacement of the calibration plate is constant for each rotation of the rotating shaft, the distance of the axial movement of the calibration plate can be acquired by acquiring the angle of rotation of the rotating shaft, thereby calibrating the three-dimensional scanner. Automated calibration saves time and effort, is highly efficient, and has small calibration errors and high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic cross-sectional view of a calibration device for a three-dimensional scanner according to an embodiment of the present application;

[0031] Figure 2This is a partial schematic diagram of a calibration device for a three-dimensional scanner according to an embodiment of the present application.

[0032] icon:

[0033] 100-housing; 200-circuit board; 300-drive motor; 400-transmission mechanism; 410-transmission cylinder; 411-sliding cavity; 412-guide hole; 420-sliding rod; 430-threaded seat; 440-anti-rotation pin; 500-calibration plate; 600-encoder; 700-infrared transmitter; 800-infrared receiver; 900-integrated seat; 910-first side panel; 911-first positioning hole; 920-bottom plate; 930-second side panel; 931-second positioning hole; 001-positioning cylinder; 011-avoidance through hole. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0040] In the prior art, three-dimensional scanners such as oral digital impression scanners need to be calibrated after long-term use. Currently, calibration is generally performed by manually holding a calibration plate 500 and moving it along a set route. The operation is cumbersome, inefficient, and has low accuracy.

[0041] In view of this, the designer provides a calibration device for a three-dimensional scanner, which can realize automatic calibration with low labor intensity, high efficiency and high accuracy.

[0042] Please combine Figure 1-Figure 2 In this embodiment, the calibration device for a three-dimensional scanner includes a housing 100 , a circuit board 200 , a drive motor 300 , a transmission mechanism 400 , a calibration plate 500 , an encoder 600 , an infrared transmitter 700 , and an infrared receiver 800 . The shell 100 is used to position the three-dimensional scanner to be calibrated; the circuit board 200 is installed on the shell 100, and the drive motor 300, encoder 600, infrared transmitter 700 and infrared receiver 800 are all communicatively connected to the circuit board 200; the drive motor 300 and the transmission mechanism 400 are both installed on the shell 100, and the transmission mechanism 400 is simultaneously connected to the drive motor 300 and the calibration plate 500, and the transmission mechanism 400 is used to convert the rotational motion of the drive motor 300 into the rotational motion and linear reciprocating motion of the calibration plate 500; the encoder 600 is installed on the drive motor 300, and is used to obtain the rotation angle of the rotating shaft of the drive motor 300; the infrared transmitter 700 and the infrared receiver 800 are both installed on the shell 100, and the infrared receiver 800 is used to receive infrared rays emitted by the infrared transmitter 700; the calibration plate 500 can be located on the propagation path of the infrared rays emitted by the infrared transmitter 700 during the linear reciprocating motion.

[0043] As described above, the calibration device for a 3D scanner provided in this embodiment works as follows:

[0044] When calibration is needed, the three-dimensional scanner to be calibrated is installed at one end of the shell 100, the power supply is started, the infrared emitter 700 emits infrared rays, if the infrared rays are received by the infrared receiver 800, at this time the information is acquired by the circuit board 200, the circuit board 200 controls the driving motor 300 to move, and drives the calibration plate 500 to retreat through the transmission mechanism 400, when the infrared rays emitted by the infrared emitter 700 cannot be received by the infrared receiver 800, the surface calibration plate 500 returns to the initial position, and the reset of the calibration plate 500 is realized. Then, the circuit board 200 controls the driving motor 300 to rotate reversely, the transmission mechanism 400 drives the calibration plate 500 to approach the three-dimensional scanner to be calibrated, in the calibration process, the encoder 600 acquires the angle of rotation of the rotating shaft of the driving motor 300 in real time, since the displacement of the calibration plate 500 in the axial direction is a certain value when the rotating shaft rotates one circle, the distance of the axial movement of the calibration plate 500 can be acquired by acquiring the angle of rotation of the rotating shaft, so as to calibrate the three-dimensional scanner. The automatic calibration is adopted, time and labor are saved, the efficiency is high, the calibration error is small, and the accuracy is high.

[0045] It should be understood that when the reset of the calibration plate 500 is completed, the infrared emitter 700 can stop emitting infrared rays, and the calibration plate 500 can be driven by the driving motor 300 and the transmission mechanism 400 to perform the calibration operation.

[0046] It should be understood that the encoder 600 can be a multi-turn absolute value encoder 600 and the like. The encoder 600 is installed at the tail end of the driving motor 300, the code disc of the encoder 600 can rotate together with the rotating shaft of the driving motor 300, obviously, the structure of the encoder 600 is a known technology, and how the encoder 600 cooperates with the driving motor 300 is also a known technology, which will not be described in detail in the embodiment to avoid repeated description.

[0047] The following embodiment describes the detailed structure of the calibration device for the three-dimensional scanner of the present application in an exemplary manner.

[0048] Please refer to Figure 1-Figure 2 In the embodiment, optionally, the transmission mechanism 400 includes a transmission cylinder 410, a sliding rod 420 and a threaded seat 430. The transmission cylinder 410 is rotatably matched with the shell 100, one end of the transmission cylinder 410 is installed on the rotating shaft of the driving motor 300, and the transmission cylinder 410 is fixed relative to the rotating shaft in the axial direction of the rotating shaft; the sliding rod 420 is slidably matched with the transmission cylinder 410 in the axial direction of the transmission cylinder 410, and the two are fixed relative to each other in the circumferential direction of the transmission cylinder 410; the sliding rod 420 is fixedly connected with the calibration plate 500; the threaded seat 430 is fixed to the shell 100, and the sliding rod 420 penetrates through the threaded seat 430 and is threadedly connected with the threaded seat 430.

[0049] It should be understood that after the drive motor 300 is activated, it drives the transmission cylinder 410 to rotate, which in turn drives the sliding rod 420 to rotate. The sliding rod 420 is threadedly connected to the threaded seat 430, and the threaded seat 430 is not easily fixed in position and does not rotate with the sliding rod 420. Therefore, the sliding rod 420 can reciprocate linearly along its own axis under the guidance of the transmission cylinder 410. As the sliding rod 420 drives the calibration plate 500 to rotate, it gradually approaches the 3D scanner to be calibrated, allowing calibration operations to be performed within a set distance. The calibration plate 500 operates stably and reliably, and the calibration efficiency is high.

[0050] Furthermore, the transmission cylinder 410 is provided with a sliding cavity 411 and a guide hole 412 connected to the sliding cavity 411. The sliding cavity 411 can be a cylindrical cavity, and the axis of the sliding cavity 411 is colinear with the axis of the transmission cylinder 410. The guide hole 412 is a bar-shaped hole, and the length direction of the guide hole 412 is consistent with the axial direction of the transmission cylinder 410. There are two guide holes 412 and they are arranged symmetrically. Correspondingly, an anti-rotation pin 440 is provided on the sliding rod 420, and the sliding rod 420 is passed through the sliding cavity 411. The two ends of the anti-rotation pin 440 are respectively passed through the guide hole 412, and the anti-rotation pin 440 and the guide hole 412 are slidably matched, and the two are relatively fixed in the circumferential direction of the transmission cylinder 410. Both ends of the anti-rotation pin 440 are positioned, and its position is stable and reliable, which can play a stable guiding role.

[0051] It should be understood that the sliding rod 420 relies on the sliding cavity 411 for guidance and positioning, and the anti-rotation pin 440 cooperates with the guide hole 412 to also play a guiding and positioning role. In this way, the sliding rod 420 is tightly matched with the transmission cylinder 410. While the sliding rod 420 rotates with the transmission cylinder 410, it can perform stable linear motion along the axial direction of the transmission cylinder 410, and is not easy to fall out of the transmission cylinder 410, and the failure rate is low.

[0052] Optionally, to facilitate installation of the anti-rotation pin 440, a mounting hole can be provided on the sliding rod 420. The mounting hole can be a threaded hole, and the anti-rotation pin 440 can be a threaded post. The anti-rotation pin 440 is screwed into the mounting hole. The assembly of the anti-rotation pin 440 and the mounting hole is simple and reliable. By rotating the anti-rotation pin 440, the position of the anti-rotation pin 440 relative to the sliding rod 420 can be adjusted, thereby ensuring that the two ends of the anti-rotation pin 440 can be inserted into the two guide holes 412.

[0053] Optionally, the sliding rod 420 includes an integrated smooth rod section and a threaded rod section. The threaded rod section is threadedly secured to the threaded seat 430, and the mounting holes are provided in the smooth rod section. Since the sliding rod 420 slides within a set range, only portions of the sliding rod 420 are provided with external threads. The rod sections provided with external threads are considered threaded rod sections. This reduces the thread processing area, reduces processing difficulty, and improves processing efficiency. Furthermore, providing the mounting holes in the smooth rod section improves the accuracy of the mounting hole processing position and reduces the difficulty of processing the mounting holes.

[0054] It should be understood that there can be multiple mounting holes, and the multiple mounting holes are spaced apart in the axial direction of the smooth rod segment, and the axes of the multiple mounting holes are located on the same plane. The anti-rotation pin 440 can be selectively screwed and fixed to one of the multiple mounting holes.

[0055] With this design, by providing multiple mounting holes, the anti-rotation pin 440 can be inserted into the corresponding mounting hole as needed, thereby adjusting the initial position of the anti-rotation pin 440 in the guide hole 412, thereby adjusting the range of motion of the sliding rod 420. That is, when the sliding rod 420 drives the calibration plate 500 to approach the three-dimensional scanner to be calibrated, the anti-rotation pin 440 moves along with the sliding rod 420, and the anti-rotation pin 440 can contact the hole wall of the guide hole 412 close to the three-dimensional scanner to be calibrated, thereby limiting the continued movement of the sliding rod 420 and preventing the calibration plate 500 from colliding with the three-dimensional scanner to be calibrated. When the position of the anti-rotation pin 440 is adjusted, the distance between the anti-rotation pin 440 and the hole wall of the guide hole 412 close to the three-dimensional scanner to be calibrated changes, thereby adjusting the displacement range of the sliding rod 420. It is flexible to use and can adapt to different scenarios.

[0056] For example, the number of mounting holes may be two or three, etc.

[0057] Please combine Figure 1-Figure 2 In this embodiment, the calibration device for a three-dimensional scanner optionally further includes an integrated seat 900, which is detachably connected to the housing 100. The drive motor 300, the transmission cylinder 410, and the threaded seat 430 are all fixed to the integrated seat 900. It should be understood that the housing 100 can be configured as a split structure. For example, the housing 100 includes two half shells, and the two half shells are detachably connected by bolts or buckles. The two half shells can be first separated, and then the integrated seat 900 and other components can be installed in one of the half shells. The two half shells can then be matched together, which is convenient for installation.

[0058] Furthermore, the drive motor 300, transmission cylinder 410, and threaded seat 430 are all fixed to the integrated base 900. Multiple components rely on the integrated base 900 for positioning and installation. This allows for more accurate and reliable assembly positioning between the components, resulting in a tighter fit and improved assembly quality. Furthermore, the integration of multiple components into a module enables modular installation and disassembly, improving assembly and disassembly efficiency.

[0059] Furthermore, the integrated seat 900 includes a first side plate 910, a bottom plate 920 and a second side plate 930 connected in sequence, the first side plate 910 and the second side plate 930 are located on the same side of the bottom plate 920 and are arranged relatively parallel, the first side plate 910 is provided with a first positioning hole 911, the second side plate 930 is provided with a second positioning hole 931, and the first positioning hole 911 and the second positioning hole 931 are coaxially arranged; the two ends of the transmission cylinder 410 are respectively inserted into the first positioning hole 911 and the second positioning hole 931, and the threaded seat 430 is inserted into the second positioning hole 931 and is located at the end of the transmission cylinder 410 away from the first side plate 910.

[0060] With this design, the transmission cylinder 410 and the threaded seat 430 are installed and positioned by the first positioning hole 911 and the second positioning hole 931, which facilitates installation. The transmission cylinder 410 and the threaded seat 430 have a high degree of coaxiality, which can improve the stability of the movement of the sliding rod 420. It should be understood that the first positioning hole 911 and the second positioning hole 931 can both be round holes.

[0061] In this embodiment, the infrared emitter 700 is optionally integrated on the circuit board 200, and the circuit board 200 is mounted on the integration base 900. The position of the infrared emitter 700 is stable and reliable, and the space occupied is small, and the overall volume is small, which is convenient for installation.

[0062] In this embodiment, the 3D scanner calibration device optionally further includes a positioning cylinder 001, onto which the infrared receiver 800 is mounted. Positioning cylinder 001 can be mounted to the base plate 920 of the integrated base 900 using bolts or other structural members. The top of positioning cylinder 001 is provided with a through-hole 011 for allowing infrared light emitted by the infrared emitter 700 to pass through. The calibration plate 500 is located within the area enclosed by positioning cylinder 001. Positioning cylinder 001 not only serves to mount and position the infrared receiver 800 but also shields the area surrounding the infrared receiver 800, reducing the adverse effects of external light on the infrared receiver 800.

[0063] The calibration device for a three-dimensional scanner provided in this embodiment adopts automated calibration, which saves time and effort, is highly efficient, and has high accuracy.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A calibration device for a three-dimensional scanner, characterized in that: include: A housing (100), a circuit board (200), a driving motor (300), a transmission mechanism (400), a calibration plate (500), an encoder (600), an infrared transmitter (700) and an infrared receiver (800); the housing (100) is used to position a three-dimensional scanner to be calibrated; the circuit board (200) is mounted on the housing (100), the driving motor (300), the encoder (600), the infrared transmitter (700) and the infrared receiver (800) are all communicatively connected to the circuit board (200); the driving motor (300) and the transmission mechanism (400) are both mounted on the housing (100), and the transmission mechanism (400) is simultaneously connected to the driving motor The invention relates to a housing (100) comprising a drive motor (300) and a calibration plate (500), wherein the transmission mechanism (400) is used to convert the rotational motion of the drive motor (300) into the rotational motion and linear reciprocating motion of the calibration plate (500); the encoder (600) is installed on the drive motor (300) and is used to obtain the rotation angle of the rotation shaft of the drive motor (300); the infrared transmitter (700) and the infrared receiver (800) are both installed on the housing (100), and the infrared receiver (800) is used to receive infrared rays emitted by the infrared transmitter (700); and the calibration plate (500) can be located on the propagation path of the infrared rays emitted by the infrared transmitter (700) during the linear reciprocating motion.

2. The calibration device for a three-dimensional scanner according to claim 1, wherein: The transmission mechanism (400) includes a transmission cylinder (410), a sliding rod (420) and a threaded seat (430); the transmission cylinder (410) is rotatably matched with the housing (100), one end of the transmission cylinder (410) is mounted on the rotating shaft of the drive motor (300), and the transmission cylinder (410) and the rotating shaft are relatively fixed in the axial direction of the rotating shaft; the sliding rod (420) and the transmission cylinder (410) are slidably matched in the axial direction of the transmission cylinder (410), and the two are relatively fixed in the circumferential direction of the transmission cylinder (410); the sliding rod (420) is fixedly connected to the calibration plate (500); the threaded seat (430) is fixed to the housing (100), the sliding rod (420) passes through the threaded seat (430) and the two are threadedly connected.

3. The calibration device for a three-dimensional scanner according to claim 2, wherein: The transmission cylinder (410) is provided with a sliding cavity (411) and a guide hole (412) connected to the sliding cavity (411), the guide hole (412) is a strip-shaped hole, and the length direction of the guide hole (412) is consistent with the axial direction of the transmission cylinder (410); the sliding rod (420) is provided with an anti-rotation pin (440), the sliding rod (420) is inserted into the sliding cavity (411), and the anti-rotation pin (440) is inserted into the guide hole (412).

4. The 3D scanner calibration device according to claim 3, wherein: The calibration device for a three-dimensional scanner further comprises an integrated seat (900), wherein the integrated seat (900) is detachably connected to the housing (100); the driving motor (300), the transmission cylinder (410) and the threaded seat (430) are all fixed to the integrated seat (900).

5. The 3D scanner calibration device according to claim 4, wherein: The integrated seat (900) includes a first side plate (910), a bottom plate (920) and a second side plate (930) connected in sequence, wherein the first side plate (910) and the second side plate (930) are located on the same side of the bottom plate (920) and are relatively parallel to each other, a first positioning hole (911) is provided on the first side plate (910), and a second positioning hole (931) is provided on the second side plate (930), and the first positioning hole (911) and the second positioning hole (931) are coaxially arranged; the two ends of the transmission cylinder (410) are respectively inserted into the first positioning hole (911) and the second positioning hole (931), and the threaded seat (430) is inserted into the second positioning hole (931) and is located at the end of the transmission cylinder (410) away from the first side plate (910).

6. The calibration device for a three-dimensional scanner according to claim 4, wherein: The infrared emitter (700) is integrated on the circuit board (200), and the circuit board (200) is mounted on the integration seat (900).

7. The calibration device for a three-dimensional scanner according to claim 6, wherein: The calibration device for the three-dimensional scanner further comprises a positioning cylinder (001), the infrared receiver (800) is mounted on the positioning cylinder (001), the positioning cylinder (001) is mounted on the integrated seat (900), and the top of the positioning cylinder (001) is provided with an avoidance through-hole (011) for allowing infrared rays emitted by the infrared emitter (700) to pass through; the calibration plate (500) is located within the area enclosed by the positioning cylinder (001).

8. The calibration device for a three-dimensional scanner according to claim 3, wherein: The sliding rod (420) is provided with a mounting hole, and the anti-rotation pin (440) is screwed and fixed to the mounting hole.

9. The calibration device for a three-dimensional scanner according to claim 8, wherein: The sliding rod (420) comprises an integrated smooth rod section and a threaded rod section, the threaded rod section is screwed and fixed to the threaded seat (430), and the mounting hole is provided on the smooth rod section.

10. The calibration device for a three-dimensional scanner according to claim 9, wherein: There are multiple mounting holes, and the multiple mounting holes are spaced apart in the axial direction of the smooth rod segment. The anti-rotation pin (440) can be selectively screwed and fixed to one of the multiple mounting holes.

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