CN103759696A - Method for three-dimension scanning detection of inner cavity structure of cavity - Google Patents
Method for three-dimension scanning detection of inner cavity structure of cavity Download PDFInfo
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- CN103759696A CN103759696A CN201310750127.0A CN201310750127A CN103759696A CN 103759696 A CN103759696 A CN 103759696A CN 201310750127 A CN201310750127 A CN 201310750127A CN 103759696 A CN103759696 A CN 103759696A
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Abstract
The invention discloses a method for three-dimension scanning detection of an inner cavity structure of a cavity. The detection method comprises the steps that firstly, locating balls are fixed to the outer wall of the cavity; secondly, a workpiece coordinate system equal to that of a product digital analogy is established on the cavity through measuring software, each locating ball is measured, and workpiece coordinate values are recorded; thirdly, spherical coordinate values of the locating balls on a sheet body are measured through a mechanical coordinate system; fourthly, the mechanical coordinate values of the locating balls on the sheet body are manually changed into workpiece coordinate values measured before cylinder cover dissection; fifthly, an inner outline of the sheet body is scanned so that a three-dimensional model can be established and be compared with the introduced product digital analogy in a 3D mode. According to the detection method, the sheet body after dissection is compared with the product digital analogy in the 3D mode so that a color deviation diagram of the inner outline can be observed and the size deviation condition of a casting piece can be visually observed through a chromatic aberration zone in the diagram and colors on the surface of the casting piece.
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 is to integrate light, mechanical, electrical and new and high technology computer technology, is mainly used in object space profile and structure to scan, to obtain the volume coordinate of body surface.Its significance is steric information in kind to be converted to calculates the digital signal that function is directly processed, for digitizing in kind provides quite conveniently means.
Spatial digitizer is as one measurement in space equipment fast, being easy to of having made up that three coordinate measuring machine exists damage gauge head, the surface that scratches tested part, measuring speed slow, be difficult for obtaining continuous coordinate points and the shortcoming that cannot measure frangible, yielding object.Because its measuring speed is fast, precision is high, noncontact, the advantage such as easy to use more and more applied.
Conventionally the measurement data obtaining after scanning is comprised of a large amount of three-dimensional coordinate points, according to the size of the character of scanner, sweep parameter and testee, by hundreds of, does not put millions of points not etc., and these a large amount of three-dimensional data points are called " some cloud ".Use spatial digitizer to scan product, cloud data can be collected to the digital model (this process is called three-dimensional reconstruction) that creates actual object in computing machine.
At present 3-D scanning application, first be to use spatial digitizer to scan product, by the cloud data collecting, be built into face, then using scan-data (three-dimensional model that scanning builds) to carry out matching with product digital-to-analogue (product design three-dimensional model) aligns, after completing, matching carries out 3D comparison, generate colored deviation map, by the color relation of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation that can visually see, thereby more easily help us to accessory size situation, to analyze.
For some, want the position of concrete dimensional discrepancy can create annotation, can show so the concrete numerical value of deviation herein, by numerical value, we can check that some the position process redundancy that need to process is no enough.Can check by Marking of Shape and Position Tolerance the flatness of some plane, check some form and position tolerances such as the position degree of some lug.Meanwhile, also can, to the larger position of dimensional discrepancy, carry out multiple spot annotation, according to the flat law of dimension of searching of the dimensional discrepancy of annotation.
With 3-D scanning, carry out 3D compare of analysis at present, mainly that the outer surface profile of product is carried out to scanning analysis, for inner-cavity structure part, can only after dissecting, to it, scan again, but due to the not coordinate system same with product digital-to-analogue (design three-dimensional model) of the lamellar body after dissecting, so be difficult to it to carry out 3D comparison.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, a kind of simple and fast is provided, lamellar body and product digital-to-analogue after dissecting can be carried out to 3D and compared, to observe the colored deviation map of in-profile, by the color of the aberration band in figure and cast(ing) surface, find out intuitively the cavity inner-cavity structure 3-D scanning detection method of its dimensional discrepancy situation.
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 guarantees that multi-disc dissects and on each lamellar body of rear chamber, have three location spheroids at least;
Second step is set up the workpiece coordinate system same with product digital-to-analogue on cavity by Survey Software, and workpiece coordinate value is measured and recorded to each location spheroid;
The 3rd step, dissects into lamellar body by cavity with line cutting, and by coordinate system of machine, measures the spheroidal coordinate value of the location spheroid on lamellar body;
The 4th step, manually changes to cylinder cap the machine coordinate figure of locating spheroid on lamellar body and dissects the workpiece coordinate value of measuring before, and utilizes the best-fit function on three-dimensional comparison software to create workpiece coordinate system by the workpiece coordinate value of location spheroid;
The 5th step imports the new workpiece coordinate system creating of lamellar body on scanning software, then the in-profile of lamellar body is scanned and builds three-dimensional model, and carry out 3D with the product digital-to-analogue importing and compare.
In technique scheme, cavity is cylinder cap.
In technique scheme, on each lamellar body of multi-disc dissection rear chamber, be fixed with three location spheroids.
In technique scheme, location spheroid 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 comparison software of the 4th step adopts Geomagic Qualify2012.
In technique scheme, the scanning software of the 5th step is for adopting ScanWorks V5.5.
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 lamellar body and product digital-to-analogue after dissecting are carried out to 3D and are compared, to observe the colored deviation map of in-profile, can find out intuitively by the color of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the welding location spheroid of cavity inner-cavity structure 3-D scanning detection method of the present invention;
Fig. 2 be cavity inner-cavity structure 3-D scanning detection method of the present invention by coordinate system of machine, measure the schematic diagram of spheroidal coordinate value;
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 is not subject to the restriction of embodiment.It will be appreciated that, mentioned in following embodiment of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " be all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, 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 lamellar body and product digital-to-analogue after dissecting are carried out to 3D and are compared, to observe the colored deviation map of in-profile, can find out intuitively by the color of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation.
Detailed description by way of example but unrestriced mode has illustrated the disclosure, should be understood that the realization that can be combined by independent realization or with other aspects in various aspect of the present disclosure below.This instructions clearly enables those skilled in the art to manufacture and uses us to believe for new and non-obvious improvement, describe some embodiment, alternative, modification, alternatives and system applies, comprised the current best mode that is considered to carry out the inventive principle of describing in this instructions.When describing element or feature and/or embodiment, titled with " one " " one " " be somebody's turn to do " and " described ", be intended to expression and there are one or more in element or feature.Term " comprises " that " comprising " and " having " is intended to is comprising property, and also has extra element or feature beyond being illustrated in those specifically described elements or feature.
This cavity inner-cavity structure 3-D scanning detection method has proposed a kind of new work of setting up sits calibration method and completes the 3-D scanning comparison of product cavity structure, illustrates below with a kind of cylinder cap, and as shown in Figure 3, its concrete steps comprise:
The first step, first at cylinder cap outer wall welding location spheroid, and guarantees that multi-disc dissects and on each lamellar body of back cylinder cover, have three location spheroids at least;
For example, on the position of planning in the surrounding of cylinder cap, weld upper sphere 1, spheroid 2, spheroid 3(as shown in Figure 1), if cylinder cap will carry out multi-disc dissection, paste after will guaranteeing to dissect during spheroid and will have three spheroids on each lamellar body, and carry out mark with digital 1,2,3.
Second step is set up the workpiece coordinate system 4 same with product digital-to-analogue (product design three-dimensional model) on cylinder cap by Survey Software, and spheroid 1, spheroid 2, spheroid 3 is measured and recorded the workpiece coordinate value of spheroid; Wherein, Survey Software adopts PC-DMIS2010.
For example: spheroid 1, spheroid 2, spheroid 3 through the workpiece coordinate value under survey record are: 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).
The 3rd step, dissects into lamellar body 6(as shown in Figure 2 by cylinder cap with line cutting), then by coordinate system of machine 5, measure spheroid 1, spheroid 2, the spheroid 3 spheroidal coordinate values on lamellar body 6;
At this moment the spheroidal coordinate value of measuring is machine coordinate figure, as the machine coordinate figure of 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).
The 4th step, the machine coordinate figure of the spheroid on lamellar body 6 is manually changed to cylinder cap and dissect the workpiece coordinate value of measuring before, each spheroid is corresponding one by one, has changed after coordinate figure, by the coordinate figure of these three spheroids, utilizes the best-fit function on three-dimensional comparison software to create coordinate system; Wherein, three-dimensional comparison software adopts Geomagic Qualify2012.
What by the coordinate figure of these three spheroids, utilize that best-fit function on software creates coordinate system utilization is reverse principle.It is the same that the workpiece coordinate system 4 of building up on lamellar body 6 so just the workpiece coordinate system before not dissecting with cylinder cap, afterwards coordinate system is derived.
The 5th step imports lamellar body workpiece coordinate system 4 on scanning software, then the in-profile of lamellar body is scanned, and imports product digital-to-analogue (product design three-dimensional model) and carry out 3D comparison after scanning is good; Wherein, scanning software adopts ScanWorks V5.5.
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, comparison just can be observed the colored deviation map of in-profile like this, by can visually see its dimensional discrepancy situation of the color relation of the aberration band in figure and cast(ing) surface.
To sum up, this cavity inner-cavity structure 3-D scanning detection method simple and fast, by lamellar body and product digital-to-analogue after dissecting are carried out to 3D and compared, to observe the colored deviation map of in-profile, can find out intuitively by the color of the aberration band in figure and cast(ing) surface its dimensional discrepancy situation.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and 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, is characterized in that, concrete steps comprise:
The first step, at chamber outer wall stationary positioned spheroid, and guarantees that multi-disc dissects and on each lamellar body of rear chamber, have three location spheroids at least;
Second step is set up the workpiece coordinate system same with product digital-to-analogue on cavity by Survey Software, and workpiece coordinate value is measured and recorded to each location spheroid;
The 3rd step, dissects into lamellar body by cavity with line cutting, and by coordinate system of machine, measures the spheroidal coordinate value of the location spheroid on lamellar body;
The 4th step, manually changes to cylinder cap the machine coordinate figure of locating spheroid on lamellar body and dissects the workpiece coordinate value of measuring before, and utilizes the best-fit function on three-dimensional comparison software to create workpiece coordinate system by the workpiece coordinate value of location spheroid;
The 5th step imports the new workpiece coordinate system creating of lamellar body on scanning software, then the in-profile of lamellar body is scanned and builds three-dimensional model, and carry out 3D with the product digital-to-analogue importing and compare.
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: on each lamellar body of described multi-disc dissection rear chamber, be fixed with three location spheroids.
4. according to the cavity inner-cavity structure 3-D scanning detection method described in any one in claims 1 to 3, it is characterized in that: described location spheroid 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 comparison software of described the 4th step adopts Geomagic Qualify2012.
7. cavity inner-cavity structure 3-D scanning detection method according to claim 1, is characterized in that: the scanning software of described the 5th step adopts ScanWorks V5.5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180807A (en) * | 2015-08-28 | 2015-12-23 | 武汉大学 | Detection method for manufacturing precision of dental restoration support |
| 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 |
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| EP1607041A2 (en) * | 2004-06-17 | 2005-12-21 | Cadent Ltd. | Method for providing data associated with the intraoral cavity |
| US20060008777A1 (en) * | 2004-07-08 | 2006-01-12 | Peterson David S | System and mehtod for making sequentially layered dental restoration |
| 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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2013
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Patent Citations (5)
| 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 |
| US20060008777A1 (en) * | 2004-07-08 | 2006-01-12 | Peterson David S | System and mehtod for making sequentially layered dental restoration |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105180807A (en) * | 2015-08-28 | 2015-12-23 | 武汉大学 | Detection method for manufacturing precision of dental restoration support |
| 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 |
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