CN103759696B - Cavity inner-cavity structure 3-D scanning detection method - Google Patents
Cavity inner-cavity structure 3-D scanning detection method Download PDFInfo
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- CN103759696B CN103759696B CN201310750127.0A CN201310750127A CN103759696B CN 103759696 B CN103759696 B CN 103759696B CN 201310750127 A CN201310750127 A CN 201310750127A CN 103759696 B CN103759696 B CN 103759696B
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Abstract
The invention discloses a kind of cavity inner-cavity structure 3-D scanning detection method.This detection method comprises: the first step, at chamber outer wall stationary positioned spheroid; Second step, sets up the workpiece coordinate system same with product digital-to-analogue by Survey Software on cavity, and measures each positioning ball and record workpiece coordinate value; 3rd step, measures the spheroidal coordinate value of the positioning ball on lamellar body by coordinate system of machine; 4th step, manually changes to the machine coordinates value of positioning ball on lamellar body the workpiece coordinate value of the pre-test of cylinder cap dissection; 5th step, carries out scanning to the in-profile of lamellar body and builds three-dimensional model, and carry out 3D comparison with the product digital-to-analogue imported.This detection method, by the lamellar body after dissecting and product digital-to-analogue are carried out 3D comparison, to observe the colored deviation map of in-profile, can find out its dimensional discrepancy situation intuitively by the color of the aberration band in figure and cast(ing) surface.
Description
Technical field
The present invention relates to 3-D scanning field, particularly a kind of cavity inner-cavity structure 3-D scanning detection method.
Background technology
3-D scanning integrates light, mechanical, electrical and new and high technology that is computer technology, is mainly used in scanning object space profile and structure, to obtain the volume coordinate of body surface.Its significance is the steric information of material object to be converted to the digital signal calculating function and directly process, for digitizing in kind provides quite conveniently means.
Spatial digitizer, as one measurement in space equipment fast, compensate for being easy to that three coordinate measuring machine exists and damages gauge head, scratches the shortcoming that the surface of tested part, measuring speed slowly, not easily obtain continuous print coordinate points and cannot measure frangible, yielding object.Because its measuring speed is fast, precision is high, noncontact, the advantage such as easy to use and more and more being applied.
The measurement data obtained after usual scanning is made up of a large amount of three-dimensional coordinate points, and according to the size of the character of scanner, sweep parameter and testee, by hundreds of point to millions of point not etc., these a large amount of three-dimensional data points are called " some cloud ".Use spatial digitizer to scan product, cloud data can be collected in computing machine the digital model (this process is called three-dimensional reconstruction) creating actual object.
Current 3-D scanning application, first be use spatial digitizer to scan product, face is built into by the cloud data collected, then use scan-data (three-dimensional model that scanning builds) to carry out matching with product digital-to-analogue (product design three-dimensional model) to align, carry out 3D after matching completes to compare, generate colored deviation map, be can visually see by the color relation of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation, thus more easily help us to analyze accessory size situation.
Want the position of concrete dimensional discrepancy to create annotation for some, can show the concrete numerical value of deviation herein like this, by numerical value, we can check that some needs the position process redundancy of processing enough no.The flatness of some plane can be checked by Marking of Shape and Position Tolerance, check some form and position tolerances such as the position degree of some lug.Meanwhile, also to the larger position of dimensional discrepancy, multiple spot annotation can be carried out, search law of dimension according to the dimensional discrepancy of annotation is flat.
Current use 3-D scanning carries out 3D compare of analysis, mainly scanning analysis is carried out to the outer surface profile of product, for inner-cavity structure part, can only scan it again after dissecting, but due to the coordinate system that the lamellar body after dissecting is not same with product digital-to-analogue (design three-dimensional model), so be difficult to carry out 3D comparison to it.
Summary of the invention
The present invention is to overcome defect in above-mentioned prior art, provide a kind of simple and fast, lamellar body after dissection and product digital-to-analogue can be carried out 3D comparison, to observe the colored deviation map of in-profile, found out the cavity inner-cavity structure 3-D scanning detection method of its dimensional discrepancy situation intuitively by the color of the aberration band in figure and cast(ing) surface.
For achieving the above object, according to the invention provides a kind of cavity inner-cavity structure 3-D scanning detection method, concrete steps comprise:
The first step, at chamber outer wall stationary positioned spheroid, and ensure multi-disc dissect rear chamber each lamellar body on have three positioning ball at least;
Second step, sets up the workpiece coordinate system same with product digital-to-analogue by Survey Software on cavity, and measures each positioning ball and record workpiece coordinate value;
3rd step, dissects into lamellar body with Linear cut by cavity, and measures the spheroidal coordinate value of the positioning ball on lamellar body by coordinate system of machine;
4th step, manually changes to the machine coordinates value of positioning ball on lamellar body the workpiece coordinate value of the pre-test of cylinder cap dissection, and utilizes the best-fit function on three-dimensional alignment software to create workpiece coordinate system by the workpiece coordinate value of positioning ball;
5th step, scanning software imports the workpiece coordinate system that lamellar body newly creates, and then carries out scanning to the in-profile of lamellar body and builds three-dimensional model, and carry out 3D comparison with the product digital-to-analogue imported.
In technique scheme, cavity is cylinder cap.
In technique scheme, each lamellar body of multi-disc dissection rear chamber is fixed with three positioning ball.
In technique scheme, positioning ball is weldingly fixed on chamber outer wall.
In technique scheme, the Survey Software of second step adopts PC-DMIS2010.
In technique scheme, the three-dimensional alignment software of the 4th step adopts GeomagicQualify2012.
In technique scheme, the scanning software of the 5th step is for adopting ScanWorksV5.5.
Compared with prior art, the present invention has following beneficial effect: this cavity inner-cavity structure 3-D scanning detection method simple and fast, by the lamellar body after dissection and product digital-to-analogue are carried out 3D comparison, to observe the colored deviation map of in-profile, its dimensional discrepancy situation can be found out intuitively by the color of the aberration band in figure and cast(ing) surface.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the welding positioning ball of cavity inner-cavity structure 3-D scanning detection method of the present invention;
Fig. 2 is the schematic diagram being measured spheroidal coordinate value by coordinate system of machine of cavity inner-cavity structure 3-D scanning detection method of the present invention;
Fig. 3 is the process flow diagram of cavity inner-cavity structure 3-D scanning detection method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.It will be appreciated that, mentioned in following embodiment of the present invention " on ", D score, "left", "right", " front " and " reverse side " all with the direction shown in each figure for benchmark, these words being used for limiting direction are only used to be convenient to illustrate, do not represent the restriction to the concrete technical scheme of the present invention.
Cavity inner-cavity structure 3-D scanning detection method simple and fast of the present invention, by the lamellar body after dissection and product digital-to-analogue are carried out 3D comparison, to observe the colored deviation map of in-profile, its dimensional discrepancy situation can be found out intuitively by the color of the aberration band in figure and cast(ing) surface.
Be described through citing but unrestriced mode describes the disclosure in detail below, should be understood that various aspect of the present disclosure can by independent realization or the realization be combined with other aspects.This instructions clearly enables those skilled in the art to manufacture and uses us to believe for new and non-obvious improvement, describe the application of some embodiments, alternative, modification, alternatives and system, comprise the current best mode being considered to perform the inventive principle described in this instructions.When describing element or feature and/or embodiment, be intended to represent that to have in element or feature one or more titled with " one " " one " " being somebody's turn to do " and " described ".Term " comprises " " comprising " and " having " is intended to be comprising property, and represents also have extra element or feature beyond those specifically described elements or feature.
This cavity inner-cavity structure 3-D scanning detection method proposes a kind of method setting up operating coordinates newly to complete the 3-D scanning comparison of product cavity structure, and illustrate with a kind of cylinder cap below, as shown in Figure 3, its concrete steps comprise:
The first step, first cylinder cap outer wall welding positioning ball, and ensure multi-disc dissect back cylinder cover each lamellar body on have three positioning ball at least;
On the position that the surrounding of cylinder cap is planned, such as weld upper sphere 1, spheroid 2, spheroid 3(as shown in Figure 1), if cylinder cap will carry out multi-disc dissection, to ensure when pasting spheroid to dissect on rear each lamellar body and will have three spheroids, and carry out mark by numeral 1,2,3.
Second step, sets up the workpiece coordinate system 4 same with product digital-to-analogue (product design three-dimensional model) by Survey Software on cylinder cap, and measures spheroid 1, spheroid 2, spheroid 3 and record the workpiece coordinate value of spheroid; Wherein, Survey Software adopts PC-DMIS2010.
Such as: spheroid 1, spheroid 2, the spheroid 3 workpiece coordinate value under survey record is: spheroid 1(X:20.115, Y:-97.454, Z:62.312), spheroid 2(X:128.256, Y:63.668, Z:87.845), spheroid 3(X:128.253, Y:238.698, Z:70.688).
3rd step, dissects into lamellar body 6(as shown in Figure 2 with Linear cut by cylinder cap), the spheroid 1 on lamellar body 6, spheroid 2, spheroid 3 spheroidal coordinate value is then measured by coordinate system of machine 5;
At this moment the spheroidal coordinate value measured is machine coordinates value, machine coordinates value as each spheroid in the 3rd step is respectively: spheroid 1(X:698.951, Y:223.805, Z:60.471), spheroid 2(X:831.174, Y:379.882, Z:72.553), spheroid 3(X:850.582, Y:548.814, Z:48.648).
4th step, the machine coordinates value of the spheroid on lamellar body 6 is manually changed to the workpiece coordinate value of the pre-test of cylinder cap dissection, each spheroid wants one_to_one corresponding, after having changed coordinate figure, utilizes the best-fit function on three-dimensional alignment software to create coordinate system by the coordinate figure of these three spheroids; Wherein, three-dimensional alignment software adopts GeomagicQualify2012.
By the coordinate figure of these three spheroids utilize the best-fit function on software create coordinate system utilize be reverse principle.The workpiece coordinate system 4 built up on lamellar body 6 so just the workpiece coordinate system before not dissecting to be the same with cylinder cap, afterwards coordinate system is derived.
5th step, scanning software imports lamellar body workpiece coordinate system 4, then scans the in-profile of lamellar body, imports product digital-to-analogue (product design three-dimensional model) and carry out 3D comparison after scanning is good; Wherein, scanning software adopts ScanWorksV5.5.
Because product digital-to-analogue (product design three-dimensional model) is an overall three-dimensional plot, so product digital-to-analogue (product design three-dimensional model) also will equally with material object be cut, such comparison just can observe the colored deviation map of in-profile, and be can visually see by the color relation of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation.
To sum up, this cavity inner-cavity structure 3-D scanning detection method simple and fast, by the lamellar body after dissecting and product digital-to-analogue are carried out 3D comparison, to observe the colored deviation map of in-profile, its dimensional discrepancy situation can be found out intuitively by the color of the aberration band in figure and cast(ing) surface.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. a cavity inner-cavity structure 3-D scanning detection method, it is characterized in that, concrete steps comprise:
The first step, at chamber outer wall stationary positioned spheroid, and ensure multi-disc dissect rear chamber each lamellar body on have three positioning ball at least;
Second step, sets up the workpiece coordinate system same with product digital-to-analogue by Survey Software on cavity, and measures each positioning ball and record workpiece coordinate value;
3rd step, dissects into lamellar body with Linear cut by cavity, and measures the spheroidal coordinate value of the positioning ball on lamellar body by coordinate system of machine, and the spheroidal coordinate value at this moment measured is machine coordinates value;
4th step, manually changes to the machine coordinates value of positioning ball on lamellar body the workpiece coordinate value of the pre-test of cylinder cap dissection, and utilizes the best-fit function on three-dimensional alignment software to create workpiece coordinate system by the workpiece coordinate value of positioning ball;
5th step, scanning software imports the workpiece coordinate system that lamellar body newly creates, and then carries out scanning to the in-profile of lamellar body and builds three-dimensional model, and carry out 3D comparison with the product digital-to-analogue imported.
2. cavity inner-cavity structure 3-D scanning detection method according to claim 1, is characterized in that: described cavity is cylinder cap.
3. cavity inner-cavity structure 3-D scanning detection method according to claim 2, is characterized in that: each lamellar body of described multi-disc dissection rear chamber is fixed with three positioning ball.
4. cavity inner-cavity structure 3-D scanning detection method according to any one of claim 1 to 3, is characterized in that: described positioning ball is weldingly fixed on chamber outer wall.
5. cavity inner-cavity structure 3-D scanning detection method according to claim 1, is characterized in that: the Survey Software of described second step adopts PC-DMIS2010.
6. cavity inner-cavity structure 3-D scanning detection method according to claim 1, is characterized in that: the three-dimensional alignment software of described 4th step adopts GeomagicQualify2012.
7. cavity inner-cavity structure 3-D scanning detection method according to claim 1, is characterized in that: the scanning software of described 5th step adopts ScanWorksV5.5.
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| CN105180807B (en) * | 2015-08-28 | 2018-05-29 | 武汉大学 | A kind of oral restoration body support frame makes the detection method of precision |
| CN113405487A (en) * | 2021-06-03 | 2021-09-17 | 梦达驰汽车系统（天津）有限公司 | Rapid positioning and high-precision 3D scanning measurement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1333134A2 (en) * | 2002-01-31 | 2003-08-06 | Valeo Securité Habitacle | Lock cylinder |
| EP1607041A2 (en) * | 2004-06-17 | 2005-12-21 | Cadent Ltd. | Method for providing data associated with the intraoral cavity |
| CN102829750A (en) * | 2012-08-27 | 2012-12-19 | 东风汽车公司 | Measurement method and device for detecting outline dimension of cylinder cover |
| CN202789171U (en) * | 2012-08-27 | 2013-03-13 | 东风汽车公司 | Cylinder cover structure with measuring point |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060008777A1 (en) * | 2004-07-08 | 2006-01-12 | Peterson David S | System and mehtod for making sequentially layered dental restoration |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1333134A2 (en) * | 2002-01-31 | 2003-08-06 | Valeo Securité Habitacle | Lock cylinder |
| EP1607041A2 (en) * | 2004-06-17 | 2005-12-21 | Cadent Ltd. | Method for providing data associated with the intraoral cavity |
| CN102829750A (en) * | 2012-08-27 | 2012-12-19 | 东风汽车公司 | Measurement method and device for detecting outline dimension of cylinder cover |
| CN202789171U (en) * | 2012-08-27 | 2013-03-13 | 东风汽车公司 | Cylinder cover structure with measuring point |
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