CN109115112B - Scanning support and scanning method thereof - Google Patents
Scanning support and scanning method thereof Download PDFInfo
- Publication number
- CN109115112B CN109115112B CN201810654506.2A CN201810654506A CN109115112B CN 109115112 B CN109115112 B CN 109115112B CN 201810654506 A CN201810654506 A CN 201810654506A CN 109115112 B CN109115112 B CN 109115112B
- Authority
- CN
- China
- Prior art keywords
- scanning
- workpiece
- fixed
- support
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
Abstract
The utility model discloses a scanning bracket and a scanning method of the bracket, wherein the scanning bracket comprises a bracket base, the top of the bracket base is a fixed surface, the fixed surface is provided with a datum hole and a fixed type frame, the fixed type frame is provided with a positioning pin and a datum gasket, a workpiece to be scanned is placed on the datum gasket of the fixed type frame, the scanning method comprises the steps of firstly carrying out photographic scanning on the fixed surface and the fixed type frame and fitting a scanning result to generate a file of a vehicle body coordinate system with a reference point as a template, then carrying out fixed scanning on the workpiece through the positioning pin, and obtaining three-dimensional data of the workpiece in the vehicle body coordinate system. The scanning method can replace a checking fixture to measure, reduce the working hours and manpower, and improve the measurement precision.
Description
Technical Field
The utility model belongs to the field of automobile part design, and particularly relates to a scanning support and a scanning method using the same.
Background
The photography scanning technology is based on the structural optical principle, and the camera takes the image, and the point cloud coordinate of the workpiece to be measured is calculated through the processing of the computer. The equipment utilizes a plurality of groups of fixed reference points to carry out fitting comparison on information data acquired by multiple scanning measurement, automatically combines the information data into a single integral three-dimensional stereogram, and can output digital three-dimensional data of a measured surface point for surface reconstruction, product design and precision detection.
To in traditional auto parts design field, quality testing personnel use the precision that contains fittings such as various dogs, bolt and examine a measurement auto parts, when arranging different fittings in the relevant position of examining the utensil, utilize and examine a measurement accuracy and need consume more time, the artifical data that utilizes to examine a ware and obtain the part produces great error easily moreover. For more complicated vehicle body parts, more than one measuring point may be needed to be measured, which consumes much labor and time.
For the traditional scanning measurement method, the process is as follows: scanning, fitting, reporting, scanning, fitting and reporting are complicated, and when a large number of workpieces to be scanned are encountered, the time consumed by batch scanning is very long, so that the working efficiency is low.
Disclosure of Invention
In order to solve the above problems, the present invention provides a scanning bracket and a scanning method using the same, wherein the optical scanning bracket measures three-dimensional data of an automobile part based on a photographing scanning optical scanning technology, so that man-hours and manpower spent on measuring by manually using a gauge can be reduced, and the scanning method comprises the following steps: the template-scan- · -report is established, and the workpieces can be effectively scanned in batches.
The utility model is realized by adopting the following technical scheme:
the utility model provides a scanning support, includes support base and fixed die carrier, treat that the work piece of scanning can place in on the fixed die carrier, its characterized in that: the top of support base is equipped with a plurality of benchmark hole, the fixed frame is equipped with treats that the scanning work piece carries out the locating pin fixed, the fixed frame is equipped with treats that the scanning work piece carries out the benchmark gasket that supports.
Furthermore, the support base is also provided with a support rod, and the support rod is connected with the fixed frame in a supporting manner.
Further, the clearance between the surface of the fixed frame and the inner surface of the theoretical workpiece is a fixed value.
Further, the reference gasket is a detachable reference gasket.
A scanning method applying the scanning support comprises the following steps:
a scanning template establishing step: setting a reference point on a support, acquiring a datum hole of the support, reference point data and three-dimensional data of the fixture, and fitting the datum hole of the support and the reference point data through the three-dimensional data on the surface of the fixture to generate a scanning template suitable for scanning a workpiece;
a workpiece scanning step: scanning a workpiece to be scanned in multiple directions by using a scanning instrument and generating complete three-dimensional data of the surface of the workpiece;
and a scanning result processing step: and performing gridding processing on the result generated in the workpiece scanning step, and comparing the result with a theoretical digital model.
Further, the scan template establishing step includes the steps of:
setting a reference point: before scanning operation begins, photographing and scanning the reference points attached to the support, wherein the positions of the reference points attached to the support comprise the periphery of the datum hole, the side face of the fixing type frame and the area, not covered by the workpiece, of the surface of the fixing type frame, and an adapter used for collecting actual element points of the datum hole is installed on the periphery of the datum hole.
A step of bracket base photography: the photographic instrument of the scanning instrument is utilized to photograph the fixed surface and the fixed type frame, the photographic equipment can only collect data along one direction due to the limitation of the working principle of the photographic equipment, in order to obtain the complete reference point three-dimensional information of the fixed surface and the fixed type frame, the photography is generally required to be carried out from a plurality of visual angles, and the complete reference point information is generated by obtaining a plurality of pictures from different directions.
A bracket scanning step: the surface of the fixed model frame is subjected to three-dimensional data acquisition by using a scanning instrument, and the complete reference point information of the fixed surface and the fixed model frame is obtained by photographing, so that the surface of the fixed model frame is scanned from a plurality of visual angles and spliced by using the existing reference points through a computer.
And (3) actual element point fitting: the method comprises the steps of introducing theoretical data of a fixed mould surface comprising a vehicle body coordinate system into a file comprising reference point data and a three-dimensional digital model of the fixed mould, fitting by taking the theoretical data of the fixed mould surface as a reference, constructing actual element points of a reference hole collected by a collector on the fixed surface, and calculating coordinate values corresponding to the actual element points in the vehicle body coordinate system.
A reference conversion coordinate generation step: restoring a file containing reference point data and a three-dimensional digital model of the fixed frame to a scanning step, wherein the file only contains the reference point data, fitting again by taking the coordinate values of the actual element points of the datum holes obtained in the step as a datum, and fitting the reference points obtained in the bracket photographing step and the actual element points of the datum holes to a vehicle body coordinate system by the system so as to generate a template suitable for scanning the workpiece.
Further, the workpiece scanning step includes the steps of:
and (3) developer spraying: the imaging agent is sprayed on the surface of the workpiece to be scanned, and the fixed frame is already adhered with the reference points, and the reference points are distributed enough for scanning, so that the reference points do not need to be adhered on the workpiece, the time for adhering the reference points and the reference points can be saved, and particularly, when the workpieces are scanned in batches, the efficiency can be greatly improved only by spraying the imaging agent.
A workpiece scanning step: and (3) placing the workpiece sprayed with the developer on a fixing frame, positioning the workpiece by using a positioning pin, opening a camera of a scanning instrument in a template file, and scanning the workpiece in multiple directions by using the scanning instrument to generate complete three-dimensional data of the surface of the workpiece.
And after the workpiece is scanned, gridding the scanning result, and because the reference point is fitted into the coordinate system of the vehicle body before scanning, the gridded data can be compared with the theoretical digital analogy without fitting again.
After one workpiece is scanned, the next workpiece sprayed with developer can be directly replaced for scanning, so that the scanning time is greatly reduced.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses a scanning bracket and a scanning method using the same, the optical scanning bracket comprises a fixed bracket for positioning a workpiece and a datum hole for establishing a coordinate system, the fixed bracket is provided with a positioning pin for limiting the movement of the workpiece to be scanned, the datum hole is used as a datum reference coordinate of a photography scanning technology, so that a reference point can be conveniently converted into the same coordinate system before scanning, the coordinate system is usually a vehicle body coordinate system, compared with the method for measuring the precision of the workpiece by using a checking tool, the working hour and the labor force can be reduced, more information can be obtained, and more accurate detection results can be provided.
Drawings
FIG. 1 is a schematic diagram of a forward architecture of the present invention;
FIG. 2 is a schematic view of the backside structure of the present invention;
fig. 3 is a flow chart of a scanning method of the present invention.
In the figure: 10. a reference hole; 11. a dust-proof plate; 20. positioning pins; 21. a reference pad; 30. fixing the mold frame; 40. a forklift slot; 50. a roller; 60. lifting lugs; 70. a support bar; 100. a bracket base.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1 and 2, the present invention discloses a scanning support, which comprises a support base 100, wherein the top of the support base 100 is a fixing surface 101, and a fixing frame 30 is disposed on the fixing surface. The fixing rack 30 is generally made of gypsum, the surface of the fixing rack 30 is formed by offsetting a fixed value H for the inner surface of a theoretical workpiece, the surface of the fixing rack 30 is provided with a plurality of reference gaskets 21, the thickness of each reference gasket 21 is the fixed value H, the workpiece can be placed on the reference gasket 21 arranged on the surface of the fixing rack 30, the surface of the fixing rack 30 is provided with a plurality of blind holes for installing the positioning pins 20, the positioning pins 20 can position the workpiece, and the workpiece is guaranteed to be accurately placed on the fixing rack 30. The four corners of the fixed surface 101 are respectively provided with a reference hole 10, and the computer can convert coordinates in advance according to the reference standards arranged by the reference holes 10, so that the step of using software to align the scanning data of the workpiece after scanning is eliminated.
In this embodiment, the supporting rod 70 is further disposed on the supporting base 100, and the supporting rod 70 is disposed at a contact position between the fixing surface 101 and the fixing frame 30. In order to reduce the weight of the bracket, the fixed frame 30 can reduce the amount of plaster on the premise of ensuring a certain thickness, and the support rod 70 is arranged below the suspended position, so that the frame can be prevented from being damaged due to unbalanced stress.
In this embodiment, the fixed frame 30 further includes a reference pad 21, and for a workpiece with a small thickness, the workpiece may be bent and deformed due to different placing forms or irregular placing of the conventional simple support. The reference pad 21 on the fixed frame 30 is used as a supporting surface for uniformly bearing the gravity of the part itself and preventing the part from being deformed due to the local influence of the gravity. The method can improve the accuracy of scanning the thin plate parts.
In this embodiment, the rollers 50 for moving the support base 100 are disposed on the base body of the support base 100, and the support is usually required to be moved from the storage area to the scanning area in a working site, but the support is heavy and difficult to move, and the support base 100 having the rollers 50 is convenient to move in the scanning area.
In this embodiment, the support base 100 is further provided with a lifting lug 60 for facilitating transportation of the overhead travelling crane, and the lifting lug 60 is arranged on two sides of the support base 100.
The pedestal of support base 100 is equipped with the fork truck groove 40 of the pedestal of more than one through support base 100, and this embodiment has two fork truck grooves 40, and fork truck's fork can insert this fork truck inslot 40 and drive support base 100 and remove.
The bracket base 100 is provided with the dust guard 11 corresponding to the number of the reference holes 10, the dust guard 11 of the embodiment includes a rotation point, the rotation point is disposed on one side of the reference holes 10, the plate body of the dust guard 11 rotates around the rotation point, and after the scanning operation is finished, the dust guard 11 can rotate to cover the reference holes 10, so that the reference holes 10 are prevented from falling into dust.
As shown in fig. 3, the present invention also discloses a scanning method using the above scanning support, which is a scanning method using the scanning support, the method includes the steps of firstly scanning the fixed mold frame 30 and the fixed surface 101, then fitting to generate a scanning template, and then scanning the workpiece, and the method includes the following steps:
before the workpieces are formally scanned, a scanning template suitable for scanning all the workpieces is established.
Wherein, the scanning template establishing step comprises the following steps:
setting a reference point: before the scanning operation is started, the camera scanning is performed on the support attaching reference points, the positions of the attaching reference points include the periphery of the reference hole 10, the side surface of the fixed mold 30 and the area on the surface of the fixed mold 30 which is not covered by the workpiece, and an adapter for collecting the actual element points of the reference hole 10 is installed around the reference hole 10.
A step of bracket base photography: the fixed surface 101 and the fixed frame 30 are photographed by a photographic instrument of a scanning instrument, the photographic instrument can only collect data in one direction due to the limitation of the working principle of the photographic instrument, in order to obtain the complete three-dimensional information of the reference point of the fixed surface 101 and the fixed frame 30, photographing from multiple viewing angles is generally required, and the complete information of the reference point is generated by obtaining multiple pictures from different directions.
A bracket scanning step: the surface of the fixed frame 30 is subjected to three-dimensional data acquisition by using a scanning instrument, and complete reference point information of the fixed surface 101 and the fixed frame 30 is obtained by photographing, so that the scanning is only required to be carried out from a plurality of visual angles, and the existing reference points are used for splicing by using a computer.
And (3) actual element point fitting: theoretical data of the surface of the fixed mold including the vehicle body coordinate system is introduced into a file including reference point data and a three-dimensional digital model of the fixed mold 30, fitting is performed with the theoretical data of the surface of the fixed mold as a reference, actual element points of reference holes acquired by the acquisition unit are constructed on the fixed surface 101, and coordinate values corresponding to the actual element points are calculated in the vehicle body coordinate system.
A reference conversion coordinate generation step: restoring a file containing reference point data and the three-dimensional digital model of the fixed type frame 30 to the scanning step, wherein the file only contains the reference point data, fitting again by taking the coordinate values of the actual element points of the reference holes obtained in the step as references, and fitting the reference points obtained in the bracket photographing step and the actual element points of the reference holes to a coordinate system of the vehicle body by the system so as to generate a template suitable for scanning the workpiece.
When the scanning template is established, the photographic scanning of the workpiece can be formally started, wherein the workpiece scanning step comprises the following steps:
and (3) developer spraying: the developer is sprayed on the surface of the workpiece to be scanned, and the fixed frame 30 is already pasted with the reference points, and the reference points are distributed enough for scanning, so that the reference points do not need to be pasted on the workpiece, the time for pasting the reference points and the reference points can be saved, and particularly, when the workpieces are scanned in batches, the efficiency can be greatly improved only by spraying the developer.
A workpiece scanning step: the workpiece coated with the developer is placed on a fixing frame 30, positioned by a positioning pin 20, a camera of a scanning instrument is opened in a template file, and the scanning instrument is used for scanning the workpiece in multiple directions and generating complete three-dimensional data of the surface of the workpiece.
And after the workpiece is scanned, gridding the scanning result, and because the reference point is fitted into the coordinate system of the vehicle body before scanning, the gridded data can be compared with the theoretical digital analogy without fitting again.
After one workpiece is scanned, the next workpiece sprayed with developer can be directly replaced for scanning, so that the scanning time is greatly reduced.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (7)
1. A method of scanning a scanning support, comprising the steps of:
a scanning template establishing step: the support comprises a fixed mold frame, a reference point is arranged on the support, a reference hole of the support, reference point data and three-dimensional data of the fixed mold frame are obtained, and the support reference hole and the reference point data are fitted through the three-dimensional data on the surface of the fixed mold frame to generate a scanning template suitable for scanning a workpiece;
a workpiece scanning step: scanning a workpiece to be scanned in multiple directions by using a scanning instrument and generating complete three-dimensional data of the surface of the workpiece;
and a scanning result processing step: and performing gridding processing on the result generated in the workpiece scanning step, and comparing the result with a theoretical digital model.
2. The method of scanning a scanning support of claim 1, further comprising: the scanning template establishing step comprises the following steps:
setting a reference point: before scanning operation starts, shooting and scanning a reference point attached to the support, wherein the position of the reference point attached comprises the periphery of a datum hole, the side surface of the fixed mold frame and an area which is not covered by a workpiece on the surface of the fixed mold frame, and an adapter used for collecting actual element points of the datum hole is arranged on the periphery of the datum hole;
a step of bracket base photography: shooting the fixed surface and the fixed type frame by using a shooting instrument of a scanning instrument, and generating complete reference point information by acquiring a plurality of pictures from different directions;
a bracket scanning step: utilizing a scanning instrument to acquire three-dimensional data on the surface of the fixed model;
and (3) actual element point fitting: introducing theoretical data of a fixed mould frame surface comprising a vehicle body coordinate system into a file comprising reference point data and a three-dimensional digital model of the fixed mould frame, fitting by taking the theoretical data of the fixed mould frame surface as a reference, constructing actual element points of a reference hole acquired by an acquisition unit, and calculating coordinate values corresponding to the actual element points in the vehicle body coordinate system;
a reference conversion coordinate generation step: and restoring a file containing reference point data and a three-dimensional digital model of the fixed frame to a scanning step only containing datum holes and reference point data, fitting again by taking the coordinate values of the actual element points of the datum holes obtained in the step as a datum, and fitting the reference points obtained in the step of bracket shooting and the actual element points of the datum holes to a coordinate system of the vehicle body by the system so as to generate a template suitable for scanning the workpiece.
3. The method of scanning a scanning support of claim 1, further comprising: the workpiece scanning step includes the steps of:
and (3) developer spraying: spraying developer on the surface of a workpiece to be scanned;
a workpiece scanning step: and fixing the workpiece sprayed with the developer on a positioning pin arranged on the fixing frame, and scanning the workpiece fixed on the positioning pin in multiple directions by using a scanning instrument to generate complete three-dimensional data of the surface of the workpiece.
4. A scanning stand comprising the scanning carriage of claim 1 and further comprising a carriage base on which a workpiece to be scanned can be placed, the scanning carriage comprising: the benchmark hole of support is a plurality of benchmark hole that the top of support base set up, the fixed frame is equipped with treats that the scanning work piece carries out the locating pin fixed, the fixed frame is equipped with treats that the scanning work piece carries out the benchmark gasket that supports.
5. The scanning support of claim 4, wherein: the support base is further provided with a support rod, and the support rod is connected with the fixed frame in a supporting mode.
6. The scanning support of claim 4, wherein: the clearance between the surface of the fixed frame and the inner surface of the theoretical workpiece is a fixed value.
7. The scanning support of claim 4, wherein: the reference gasket is a detachable reference gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654506.2A CN109115112B (en) | 2018-06-22 | 2018-06-22 | Scanning support and scanning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654506.2A CN109115112B (en) | 2018-06-22 | 2018-06-22 | Scanning support and scanning method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109115112A CN109115112A (en) | 2019-01-01 |
| CN109115112B true CN109115112B (en) | 2022-01-18 |
Family
ID=64822960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810654506.2A Active CN109115112B (en) | 2018-06-22 | 2018-06-22 | Scanning support and scanning method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109115112B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114136972A (en) * | 2021-10-25 | 2022-03-04 | 上汽大众汽车有限公司 | Blue light scanning part integrated detection tool and part quality evaluation method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5201416B2 (en) * | 2009-04-13 | 2013-06-05 | 株式会社アイティーティー | Image processing apparatus for photo measurement, field recording system using the same, package recording system, and laser processing system |
| CN102288123B (en) * | 2011-06-27 | 2013-03-27 | 清华大学 | Method for accurately positioning three-dimensional non-contact measurement of welding deformation |
| CN105091742A (en) * | 2014-05-07 | 2015-11-25 | 哈尔滨飞机工业集团有限责任公司 | Method for establishing helicopter jig measuring system coordinate system by using enhanced reference point |
| CN106403873B (en) * | 2016-10-19 | 2018-11-16 | 中航飞机股份有限公司西安飞机分公司 | A method of workpiece calibration coordinate system is established based on primary standard of curved surface |
| CN106903663B (en) * | 2017-03-03 | 2019-10-22 | 航天材料及工艺研究所 | A kind of positioning and marking method, the apparatus and system of the built-in part of revolving shell |
| CN108917600A (en) * | 2018-07-05 | 2018-11-30 | 西安交通大学 | A kind of labyrinth blank processing positioning method based on three-dimensional reverse |
-
2018
- 2018-06-22 CN CN201810654506.2A patent/CN109115112B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109115112A (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109115112B (en) | Scanning support and scanning method thereof | |
| US7015473B2 (en) | Method and apparatus for internal feature reconstruction | |
| WO2015154487A1 (en) | Grouped holes verticality detection system and method based on visual measurement | |
| CN107014321B (en) | Rapid field flatness measuring device and measuring method | |
| CN109253706B (en) | Tunnel three-dimensional topography measuring method based on digital image | |
| DE60010462T2 (en) | Method for measuring unevenness on a subject | |
| CN106767524A (en) | A kind of hydraulic spoon of blade detection method and device | |
| CN104315979B (en) | Three-dimensional scanner and three-dimensional scanning method | |
| CN102768026A (en) | Full-size quick blade detection method and equipment | |
| CN110044266B (en) | Photogrammetry system based on speckle projection | |
| CN208721018U (en) | A kind of scanning bracket based on photographic scanning technique | |
| CN114111526A (en) | High-precision water turbine main shaft seal circle measuring method and system | |
| CN111023992B (en) | Line structured light-based section curve characteristic detection method and application thereof | |
| CN213209886U (en) | Optical detection device | |
| CN110525683B (en) | Digital assembly shape-preserving tool, implementation and use method | |
| CN210981111U (en) | Photographic cloud platform link detection tool | |
| CN206709754U (en) | A kind of verifying attachment of 3D printing accessory size | |
| CN203657745U (en) | Cooling assembly testing device having run-out and rotation speed testing functions | |
| CN113405487A (en) | Rapid positioning and high-precision 3D scanning measurement method | |
| EP3650809A1 (en) | Three-coordinate measuring system and method | |
| CN112308902A (en) | Method for acquiring gravity center of object by combining three-dimensional scanning modeling with suspension method | |
| CN104197832A (en) | Product measuring method based on image recognizing technology | |
| CN212007145U (en) | Motor stator internal and external diameter measuring device | |
| CN210180365U (en) | Angle measuring device | |
| CN117570842A (en) | Planar pore system difference value calculation method based on photogrammetry technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |