CN109238197A - A kind of Accuracy Assessment of oral cavity spatial digitizer - Google Patents
A kind of Accuracy Assessment of oral cavity spatial digitizer Download PDFInfo
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- CN109238197A CN109238197A CN201810985014.1A CN201810985014A CN109238197A CN 109238197 A CN109238197 A CN 109238197A CN 201810985014 A CN201810985014 A CN 201810985014A CN 109238197 A CN109238197 A CN 109238197A
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- dimensional data
- standard part
- accuracy
- spatial digitizer
- measurement standard
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The present invention relates to a kind of Accuracy Assessments of oral cavity spatial digitizer, there is following steps: designing measurement standard part with CAD software；Measurement standard part is processed using numerical control machining center or 3D printer；Using 3-10 μm of measurement accuracy of three-coordinates measuring machine, standard component is measured, obtains control three-dimensional data S1；The measurement standard part is scanned with spatial digitizer to be detected, obtains three-dimensional data S2；Three-dimensional data S1, three-dimensional data S2 are opened simultaneously in Geomagic2013 software, by two Registration of Measuring Data, and intercept same area three-dimensional data；Average distance, standard deviation and the root-mean-square error numerical value between S1 and S2 are directly calculated with the functional module in Geomagic2013 software, can quantitative assessment tooth three-dimensional scanner to be measured scanning accuracy, also it can be suitable for various tooth jaw spatial digitizers, rapidly and accurately evaluate its scanning accuracy.
Description
Technical field
The present invention relates to a kind of Accuracy Assessments of spatial digitizer, and in particular to a kind of essence of oral cavity spatial digitizer
Spend evaluation method.
Background technique
Although spatial digitizer can solve the problem of numeralization production of dental prosthesis.But due to different 3-D scannings
Instrument is when obtaining tooth data, there are error, during the digitized manufacturing system for leading to dental prosthesis, can also generate error；Together
When, this error can't know, that is to say, that have no idea to correct or correct this error.
Summary of the invention
The object of the present invention is to provide a kind of Accuracy Assessments of oral cavity spatial digitizer, can be suitable for various tooth jaws
Spatial digitizer etc. in spatial digitizer, including dentognathic model/stamp spatial digitizer, mouth is rapidly and accurately evaluated three-dimensional and is swept
Retouch the scanning accuracy of instrument；And the error value of spatial digitizer can be obtained, it can quantitative assessment tooth three-dimensional scanner to be measured
Scanning accuracy.
In order to achieve the above object, the present invention has following technical solution:
A kind of Accuracy Assessment of oral cavity spatial digitizer of the invention, there is following steps:
(1) a measurement standard part is designed with CAD software；The measurement standard part includes with certain thickness parabola shaped
The pedestal of shape designs several double-deck cylinder frustums on the pedestal of the parabolic shape, is cylinder, circle close to base portion
The top of column is frustum, wherein the lower cylindrical diameter of the double-layer circular column frustum is greater than top frustum basal diameter；
(2) measurement standard part material object is processed using numerical control machining center or 3D printer；
(3) three-coordinates measuring machine for using 3-10 μm of measurement accuracy carries out three to machined measurement standard part material object out
Dimension measurement obtains control three-dimensional data S1；
(4) measurement standard part material object is scanned with spatial digitizer to be detected, obtains three-dimensional data S2；
(5) three-dimensional data S1, three-dimensional data S2 are opened simultaneously in Geomagic2013 software, and two data are registrated to
In the same coordinate system, and intercept same area three-dimensional data；
(6) with the functional module in Geomagic2013 software: accurate curved surface, variance analysis, directly calculating three-dimensional data
Average distance, standard deviation and root-mean-square error numerical value between S1 and three-dimensional data S2, can quantitative assessment tooth three to be measured
Tie up the scanning accuracy of scanner.
Wherein, the pedestal of the parabolic shape, preferably with a thickness of 10mm, radius of curvature 30mm.
The present invention has the advantages that various tooth jaw spatial digitizers can be suitable for, including dentognathic model/stamp three-dimensional is swept
It retouches instrument, spatial digitizer etc. in mouth, rapidly and accurately evaluates the scanning accuracy of spatial digitizer；And spatial digitizer can be obtained
Error value, can quantitative assessment tooth three-dimensional scanner to be measured scanning accuracy.
Detailed description of the invention
Fig. 1 is the schematic diagram of the pedestal of parabolic shape of the present invention.
In figure, 1, pedestal；2, cylinder；3, frustum.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Referring to Fig. 1, a kind of Accuracy Assessment of oral cavity spatial digitizer of the invention has following steps:
(1) a measurement standard part is designed with CAD software；The measurement standard part includes with certain thickness parabola shaped
The pedestal of shape designs several double-deck cylinder frustums on the pedestal of the parabolic shape, is cylinder, circle close to base portion
The top of column is frustum, wherein the lower cylindrical diameter of the double-layer circular column frustum is greater than top frustum basal diameter；
(2) measurement standard part material object is processed using numerical control machining center or 3D printer；
(3) three-coordinates measuring machine for using 3-10 μm of measurement accuracy carries out three to machined measurement standard part material object out
Dimension measurement obtains control three-dimensional data S1；
(4) measurement standard part material object is scanned with spatial digitizer to be detected, obtains three-dimensional data S2；
(5) three-dimensional data S1, three-dimensional data S2 are opened simultaneously in Geomagic2013 software, and two data are registrated to
In the same coordinate system, and intercept same area three-dimensional data；
(6) with the functional module in Geomagic2013 software: accurate curved surface, variance analysis, directly calculating three-dimensional data
Average distance, standard deviation and root-mean-square error numerical value between S1 and three-dimensional data S2, can quantitative assessment tooth three to be measured
Tie up the scanning accuracy of scanner.
The pedestal of the parabolic shape, preferably with a thickness of 10mm, radius of curvature 30mm.
As described above, the present invention more can be realized adequately.The foregoing is merely relatively reasonable implementations of the invention
Example, protection scope of the present invention include but is not limited to this, and those skilled in the art is any to be based on the technology of the present invention side
Unsubstantiality denaturation change is included within the scope of the present invention includes in case.
Claims (2)
1. a kind of Accuracy Assessment of oral cavity spatial digitizer, it is characterised in that there is following steps:
(1) a measurement standard part is designed with CAD software；The measurement standard part includes having certain thickness parabolic shape
Pedestal designs several double-deck cylinder frustums on the pedestal of the parabolic shape, is cylinder close to base portion, cylinder
Top is frustum, wherein the lower cylindrical diameter of the double-layer circular column frustum is greater than top frustum basal diameter；
(2) measurement standard part material object is processed using numerical control machining center or 3D printer；
(3) three-coordinates measuring machine for using 3-10 μm of measurement accuracy carries out three-dimensional survey to machined measurement standard part material object out
Amount obtains control three-dimensional data S1；
(4) measurement standard part material object is scanned with spatial digitizer to be detected, obtains three-dimensional data S2；
(5) three-dimensional data S1, three-dimensional data S2 are opened simultaneously in Geomagic2013 software, two data are registrated to same
In coordinate system, and intercept same area three-dimensional data；
(6) with the functional module in Geomagic2013 software: accurate curved surface, variance analysis, directly calculating three-dimensional data S1 and
Average distance, standard deviation and root-mean-square error numerical value between three-dimensional data S2, can quantitative assessment tooth three-dimensional to be measured sweep
Retouch the scanning accuracy of instrument.
2. a kind of Accuracy Assessment of oral cavity spatial digitizer according to claim 1, it is characterised in that: the parabolic
The pedestal of wire shaped, preferably with a thickness of 10mm, radius of curvature 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810985014.1A CN109238197A (en) | 2018-08-28 | 2018-08-28 | A kind of Accuracy Assessment of oral cavity spatial digitizer |
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| CN201810985014.1A CN109238197A (en) | 2018-08-28 | 2018-08-28 | A kind of Accuracy Assessment of oral cavity spatial digitizer |
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| CN201810985014.1A Pending CN109238197A (en) | 2018-08-28 | 2018-08-28 | A kind of Accuracy Assessment of oral cavity spatial digitizer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039786A (en) * | 2019-04-19 | 2019-07-23 | 北京大学口腔医学院 | A kind of standard evaluation method of the dedicated 3D printing system printing precision in oral cavity |
| CN110057545A (en) * | 2019-05-07 | 2019-07-26 | 北京大学口腔医学院 | The standard evaluation method of spatial digitizer scanning accuracy in a kind of mouth |
| CN110095063A (en) * | 2019-04-19 | 2019-08-06 | 北京大学口腔医学院 | A kind of standard detecting method of oral medical product 3D printing precision |
| CN110954041A (en) * | 2019-12-25 | 2020-04-03 | 中国计量科学研究院 | Calibration method of three-dimensional thread measuring instrument |
| CN112215065A (en) * | 2020-09-04 | 2021-01-12 | 北京大学口腔医学院 | Automatic identification method for dental jaw boundary characteristics |
| CN114440814A (en) * | 2022-01-25 | 2022-05-06 | 成都口口齿科技术有限公司 | Method for scanning detection precision of standard block by using intraoral scanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110039786A (en) * | 2019-04-19 | 2019-07-23 | 北京大学口腔医学院 | A kind of standard evaluation method of the dedicated 3D printing system printing precision in oral cavity |
| CN110095063A (en) * | 2019-04-19 | 2019-08-06 | 北京大学口腔医学院 | A kind of standard detecting method of oral medical product 3D printing precision |
| CN110095063B (en) * | 2019-04-19 | 2021-08-31 | 北京大学口腔医学院 | Standard detection method for 3D printing precision of oral medical product |
| CN110057545A (en) * | 2019-05-07 | 2019-07-26 | 北京大学口腔医学院 | The standard evaluation method of spatial digitizer scanning accuracy in a kind of mouth |
| CN110954041A (en) * | 2019-12-25 | 2020-04-03 | 中国计量科学研究院 | Calibration method of three-dimensional thread measuring instrument |
| CN112215065A (en) * | 2020-09-04 | 2021-01-12 | 北京大学口腔医学院 | Automatic identification method for dental jaw boundary characteristics |
| CN112215065B (en) * | 2020-09-04 | 2024-02-27 | 北京大学口腔医学院 | Automatic tooth jaw boundary feature recognition method |
| CN114440814A (en) * | 2022-01-25 | 2022-05-06 | 成都口口齿科技术有限公司 | Method for scanning detection precision of standard block by using intraoral scanner |
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Application publication date: 20190118 |