Dental model measuring device
A technology of a dental model and a measuring device, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as difficult adjustment in a large range, limited measuring angle, fixed optical path, etc., and achieves improvement of measuring efficiency and quality, accurate acquisition, Flexible Adjustable Effects
Active Publication Date: 2013-02-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
However, the existing three-dimensional optical measurement equipment for teeth has the following problems: (1) the optical path is relatively fixed, it is difficult to adjust in a wide range, and the achievable measurement angle is limited; (2) the optical path is mostly supported by a cantilever structure, and the rigidity of the measurement system is not good enough, so it is difficult to maintain the system It is valid for a long time after calibration; (3) To measure a complete dental model, point cloud data needs to be obtained from multiple angles for stitching. Existing equipment mostly uses the method of marking points on the object to be tested for feature matching to achieve stitching. It is cumbersome and will affect the original appearance of the surface of the dental model
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[0013] The dental model measuring device of the present invention includes three modules: an optical path adjustment module, a dental model positioning module and a visual measurement module. figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present invention, combined below Figure 1~5 Describe it in detail.
[0014] Such as figure 1 , 2 As shown, the optical path adjustment module includes a base 11 , a gantry beam 12 , and a clamping fine-tuning device 13 .
[0015] Wherein, the base is composed of a base plate 111 , a guide shaft support 112 , an inner hexagon screw 113 , and a vertical guide shaft 114 . The guide shaft support 112 is connected with the base plate 111 through the hexagon socket head cap screw 113, and the vertical guide shaft 114 is inserted into the guide shaft support 112 and fixed by a built-in positioning pin.
[0016] Gantry beam 12 is made up of pillar fixing frame 121, locking screw 122,123, guide shaft ...
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The invention discloses a grating projection-based dental model measuring device, which is used for non-contact measurement of a dental model, and comprises a dental model positioning module, a light path adjusting module and a vision measurement module, wherein the dental model positioning module is used for clamping a dental model to be measured and adjusting the posture of the dental model; the vision measurement module is arranged on the light path adjusting module and is used for scanning the dental model; and the light path adjusting module is used for adjusting a measurement angle of the vision measurement module and determining the measurement posture and angle of the dental model under the functions of the light path adjusting module and the dental model positioning module so as to scan the dental model. The measuring device can conveniently adjust the positions of a micro projector and an industrial camera to rapidly adjust a light path, can conveniently and reliable clamp the dental model to realize stable operation of the measuring process, and can conveniently perform non-contact measurement to accurately acquire point cloud data of the dental model.
Description
technical field [0001] The invention relates to the field of machine vision, in particular to a tooth and jaw model measuring device. Background technique [0002] With the improvement of people's material living standards and the development of population aging in our country, the number of people who need oral restoration is constantly increasing. However, the traditional restoration manufacturing technology can no longer meet the clinical needs due to the long design and production cycle and the difficulty in ensuring the quality of the restoration. Foreign countries began to introduce digital dental CAD / CAM technology into the design and production of dental restorations in the 1970s, and a mature commercial system has been put into use, which greatly improved the quality and efficiency of restorations. However, our country started relatively late in this area. At present, there are no practical products in China, and oral CAD / CAM technology is monopolized by foreign cou...
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IPC IPC(8): G01B11/24
Inventor 尹周平宋俊朱钦淼吴谋虎姚金树黄信达李文龙
Owner HUAZHONG UNIV OF SCI & TECH