CN109115112A - A kind of scanning bracket based on photographic scanning technique and the scan method using the bracket - Google Patents
A kind of scanning bracket based on photographic scanning technique and the scan method using the bracket Download PDFInfo
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- CN109115112A CN109115112A CN201810654506.2A CN201810654506A CN109115112A CN 109115112 A CN109115112 A CN 109115112A CN 201810654506 A CN201810654506 A CN 201810654506A CN 109115112 A CN109115112 A CN 109115112A
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- scanning
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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
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses the scan methods of a kind of scanning bracket based on photographic scanning technique and the application bracket, scanning bracket includes bracket base, the top of bracket base is stationary plane, stationary plane is equipped with datum hole and fixed type frame, fixed is provided with positioning pin and benchmark gasket, workpiece to be scanned is placed in the reference pads on piece of fixed type frame, scan method is first to carry out tomography scan to stationary plane and fixed type frame and be fitted scanning result, the file for the vehicle body coordinate system that a reference point is located at is generated as template, it is scanned after workpiece is fixed by positioning pin later, obtain the three-dimensional data that workpiece is located at vehicle body coordinate system.The present invention can be measured instead of using cubing, be reduced work hours and manpower, improve measurement accuracy, which is to be scanned after first fitting again, being capable of effectively batch scanning workpiece.
Description
Technical field
The invention belongs to auto parts design field more particularly to a kind of scanning bracket based on photographic scanning technique and
Using the scan method of the bracket.
Background technique
Photographic scanning technique is by video camera to absorb image based on feature optical principle, handled through computer and calculate by
Survey the point cloud coordinate of workpiece.The equipment utilization multiple groups permanent datum intends the information data of Multiple-Scan measurement intake
Composition and division in a proportion is compared with automatic splicing can export the Digital Three-Dimensional data of measured surface point at single whole 3 dimensional drawing, be used for
Carry out curve reestablishing, product design, accuracy detection.
For in traditional auto parts design field, quality inspection personnel uses the inspection comprising accessories such as various blocks, bolts
The precision of tool measurement auto parts, when different accessories is placed in the corresponding position of cubing, needs to consume using cubing measurement accuracy
Take the more time, and the data that part is manually obtained using cubing are easy to produce biggish error.For more complex
Bodywork parts might have multiple above measurement points and need to measure, can expend many working hours and manpower.
For traditional scanning survey method, process are as follows: scanning-fitting-goes out report-scanning-fitting-and goes out to report
Accuse, it is relatively complicated, when meet workpiece to be scanned it is more when, the time spent by batch scanning is very more, and there are work effects
The low situation of rate.
Summary of the invention
To solve the problem above-mentioned, the present invention provides a kind of scanning bracket based on photographic scanning technique and applies the branch
The scan method of frame, three-dimensional data of the optical scanner bracket based on tomography scan optical scanning technique measurement auto parts, from
And working hour and the manpower that cost is manually measured using cubing can be reduced, the process of the scan method is: establishing template-and sweeps
Retouch-scan --- it reports out, it being capable of effectively batch scanning workpiece.
The present invention adopts the following technical scheme that realization:
A kind of scanning bracket based on photographic scanning technique, including bracket base and fixed type frame, workpiece to be scanned can
It is placed in the fixed type frame, it is characterised in that: the top of the bracket base is equipped with several datum holes, the fixed
It is provided with the positioning pin that workpiece to be scanned is fixed, the fixed is provided with the benchmark being supported to workpiece to be scanned
Gasket.
Further, the bracket base is additionally provided with support rod, and the support rod and the fixed type frame support connect.
Further, the surface of the fixed type frame and theoretical work piece inner surface gap are a fixed values.
Further, the benchmark gasket is dismountable benchmark gasket.
A kind of scan method using the scanning bracket described in claim 1 based on photographic scanning technique, including following step
It is rapid:
Scan templates establishment step: being arranged reference point on bracket, obtain the datum hole of the bracket, with reference to point data and
The three-dimensional data of the type frame, and will be after the fitting of the three-dimensional data on the bracket datum hole and reference point data through type frame surface
Generate the scan templates for being suitable for scanning workpiece；
Workpiece scanning step: workpiece to be scanned is scanned and is generated to workpiece in multiple directions using scanner
The complete three-dimensional data of workpiece surface；
Scanning result processing step: after the result that the workpiece scanning step is generated carries out gridding processing, with theory
Digital-to-analogue is compared.
Further, the scan templates establishment step the following steps are included:
Reference point setting steps: before scanning work starts, reference point is sticked to bracket and carries out tomography scan, pastes reference point
The position region that includes around datum hole, do not covered by workpiece on the surface of the side of fixed type frame and fixed type frame,
And adapter for acquiring the actual element point of datum hole is installed around datum hole.
Bracket base photography step: photographing to stationary plane and fixed type frame using the photographic instrument of scanner, by
In the limitation of photographic equipment working principle, photographic equipment is typically only capable to acquire in one direction, in order to obtain stationary plane and fixation
The complete reference point three-dimensional information of type frame, generally requires and photographs from multiple visual angles, multiple from different directions by obtaining
Picture generate complete reference point information.
Bracket scanning step: three dimensional data collection is carried out using surface of the scanner to fixed type frame, due to having led to
It crosses photography and obtains stationary plane and the fixed complete reference point information of type frame, it is only necessary to be scanned from multiple visual angles, pass through calculating
Machine is spliced using existing reference point.
Actual element point fit procedure: it is led in the file of the three-dimensional digital model comprising reference point data and fixed type frame
Enter one comprising vehicle body coordinate system fixation type frame surface gross data, on the basis of the gross data for fixing type frame surface into
Row fitting, constructs collector datum hole actual element point collected, and calculate this in vehicle body coordinate system on stationary plane
Coordinate value corresponding to actual element point.
Reference Transforming Coordinate generation step: also by the file of the three-dimensional digital model comprising reference point data and fixed type frame
Original arrives scanning step, and file only includes with reference to point data, with the coordinate for the datum hole actual element point that above-mentioned steps obtain at this time
Fitting is re-started on the basis of value, the actual element point of reference point and datum hole that bracket photography step obtains is fitted to by system
Vehicle body coordinate system, to generate the template for being suitable for scanning workpiece.
Further, the workpiece scanning step the following steps are included:
Spraying imaging agent step: spraying imaging agent on the surface of workpiece to be scanned, since fixed type frame has pasted reference point, and
Reference point distribution is sufficient to scan, and there is no need to paste reference point on workpiece, can save reference point and paste the time of reference point,
When especially batch workpiece scans, only need to spray imaging agent can be greatly improved efficiency.
Workpiece scanning step: the workpiece for coating imaging agent is placed in fixed type frame, is positioned with positioning pin to it,
The camera that scanner is opened in template file, is scanned workpiece in multiple directions using scanner and generates work
The complete three-dimensional data in part surface.
After workpiece is completed to scan, gridding processing is carried out to scanning result, due to being fitted to reference point before scanning
In vehicle body coordinate system, the data after gridding are not needed to be fitted again and can be compared with theoretical digital-to-analogue.
The workpiece that next is jetted through imaging agent can directly be replaced after scanning one workpiece of completion to be scanned, thus greatly
Reduce scanning working hour.
Compared with prior art, the beneficial effects of the present invention are:
The invention discloses the scan method of a kind of scanning bracket based on photographic scanning technique and the application bracket, the light
Learning scanning bracket includes the fixation type frame for positioning workpiece and the datum hole for establishing coordinate system, and fixed type frame, which is equipped with, to be used
In limiting the movable positioning pin of workpiece to be scanned, can conveniently be swept datum hole as the reference coordinate of photographic scanning technique
Reference point is converted to the same coordinate system before retouching, which is usually vehicle body coordinate system, and the present invention is come with using cubing
The precision of measurement workpiece is compared, and can be reduced work hours and manpower, be obtained more information content, provide more accurate detection knot
Fruit.
Detailed description of the invention
Fig. 1 is the schematic diagram of forward structure of the invention；
Fig. 2 is the schematic diagram of backside structure of the invention；
Fig. 3 is the flow chart of scan method of the invention.
In figure: 10, datum hole；11, dust excluding plate；20, positioning pin；21, benchmark gasket；30, fixed type frame；40, forklift groove；
50, idler wheel；60, lifting lug；70, support rod；100, bracket base.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
As depicted in figs. 1 and 2, the invention discloses a kind of scanning brackets based on photographic scanning technique, including bracket bottom
Seat 100, the top of bracket base 100 are stationary plane 101, and stationary plane is equipped with fixed type frame 30.Fixed type frame 30 is generally stone
Cream production, the surface of fixed type frame 30 are that one fixed value H of inner surface biasing of theoretical workpiece is formed, the surface of fixed type frame 30
Equipped with several benchmark gaskets 21, benchmark gasket 21 with a thickness of fixed value H, workpiece can be placed on fixed 30 surface of type frame
On the benchmark gasket 21 of upper setting, the surface of fixed type frame 30 is equipped with several blind holes, for installing positioning pin 20, positioning pin
20 can position workpiece, guarantee that workpiece is accurately placed in fixed type frame 30.Four angles of stationary plane 101 are respectively provided with one
A datum hole 10, by reference data set by datum hole 10, computer can convert coordinate according to the reference data in advance, take
Disappear and has reused the step of software ajusts workpiece scan data after scanning.
In the present embodiment, bracket base 100 is additionally provided with support rod 70, and support rod 70 is set to stationary plane 101 and fixed type frame
30 contact position.In order to reduce weight support frame, fixed type frame 30 is under the premise of guaranteeing certain thickness, it is possible to reduce part gypsum
Dosage is arranged support rod 70 in the lower section for causing overhead positions, can prevent type frame from damaging because of force unbalance.
In the present embodiment, fixed type frame 30 further includes benchmark gasket 21, previous using simple for the workpiece of thinner thickness
Bracket is lack of standardization due to placing form difference or placement, may cause workpiece bows deformation.Use the base in fixed type frame 30
Quasi- gasket 21 is used as supporting surface, is used to uniformly bear part gravity itself, prevents because parts locally is affected by gravity and causes to become
Shape.The accuracy of scanning sheet parts can be improved by the method.
In the present embodiment, the pedestal of bracket base 100 is equipped with the idler wheel 50 of bracket base 100 easy to remove, is working
Scene generally requires bracket being moved to scanning area from storage area, but the heavier-weight of bracket is difficult to move, and is equipped with rolling
The bracket base 100 of wheel 50 is convenient mobile in scanning area.
In the present embodiment, the lifting lug 60 that bracket base 100 is additionally provided with convenient for overhead traveling crane transport, lifting lug 60 is set to bracket base
100 two sides.
The pedestal of bracket base 100 is equipped with one or more through the forklift groove 40 of the pedestal of bracket base 100, the present embodiment
With two forklift grooves 40, the pallet fork of fork truck is inserted into the forklift groove 40 and bracket base 100 is driven to be moved.
Bracket base 100 is equipped with dust excluding plate 11 corresponding with 10 quantity of datum hole, and the dust excluding plate 11 of the present embodiment includes one
A point of rotation, the point of rotation are set to the side of datum hole 10, and the plate body of dust excluding plate 11 is rotated around the point of rotation, scanned
After work, which can rotate to covering datum hole 10, and datum hole 10 is avoided to fall into dust.
As shown in figure 3, the invention also discloses a kind of scan method using above-mentioned scanning bracket, a kind of application is based on taking the photograph
The scan method of the scanning bracket of shadow scanning technique, this method are after being first scanned to fixed type frame 30 and stationary plane 101, to intend
Then symphysis is again scanned workpiece at scan templates, method includes the following steps:
Before formally starting to be scanned workpiece, the scan templates for being suitable for scanning all workpiece are first established.
Wherein, scan templates establishment step the following steps are included:
Reference point setting steps: before scanning work starts, reference point is sticked to bracket and carries out tomography scan, pastes reference point
Position include around datum hole 10, do not covered by workpiece on the surface of the side of fixed type frame 30 and fixed type frame 30
Region, and the adapter for acquiring the actual element point of datum hole 10 is installed around datum hole 10.
Bracket base photography step: stationary plane 101 and fixed type frame 30 are taken the photograph using the photographic instrument of scanner
Shadow, due to the limitation of photographic equipment working principle, photographic equipment is typically only capable to acquire in one direction, in order to obtain stationary plane
101 and the fixed complete reference point three-dimensional information of type frame 30, generally require and photograph from multiple visual angles, by obtain it is multiple come
Complete reference point information is generated from the picture of different directions.
Bracket scanning step: three dimensional data collection is carried out using surface of the scanner to fixed type frame 30, due to
Stationary plane 101 and the fixed complete reference point information of type frame 30 are obtained by photography, it is only necessary to are scanned, be led to from multiple visual angles
Computer is crossed to be spliced using existing reference point.
Actual element point fit procedure: in the file of the three-dimensional digital model comprising reference point data and fixed type frame 30
The gross data for importing a fixation type frame surface comprising vehicle body coordinate system, on the basis of the gross data for fixing type frame surface
It is fitted, collector datum hole actual element point collected is constructed on stationary plane 101, and calculate in vehicle body coordinate system
Coordinate value corresponding to the actual element point out.
Reference Transforming Coordinate generation step: by the file of the three-dimensional digital model comprising reference point data and fixed type frame 30
Scanning step is reverted to, file only includes with reference to point data, with the seat for the datum hole actual element point that above-mentioned steps obtain at this time
Fitting is re-started on the basis of scale value, the actual element point of reference point and datum hole that bracket photography step obtains is fitted by system
To vehicle body coordinate system, to generate the template for being suitable for scanning workpiece.
After the completion of scan templates foundation, it can formally start to carry out tomography scan to workpiece, wherein workpiece scanning step
It is rapid the following steps are included:
Spraying imaging agent step: spraying imaging agent on the surface of workpiece to be scanned, since fixed type frame 30 has pasted reference point,
And reference point distribution be sufficient to scan, there is no need to paste reference point on workpiece, can save reference point and paste reference point when
Between, when especially batch workpiece scans, only need to spray imaging agent can be greatly improved efficiency.
Workpiece scanning step: the workpiece for coating imaging agent is placed in fixed type frame 30, is carried out with positioning pin 20 to it
Positioning is opened the camera of scanner in template file, is scanned simultaneously in multiple directions to workpiece using scanner
Generate the complete three-dimensional data of workpiece surface.
After workpiece is completed to scan, gridding processing is carried out to scanning result, due to being fitted to reference point before scanning
In vehicle body coordinate system, the data after gridding are not needed to be fitted again and can be compared with theoretical digital-to-analogue.
The workpiece that next is jetted through imaging agent can directly be replaced after scanning one workpiece of completion to be scanned, thus greatly
Reduce scanning working hour.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (7)
1. a kind of scanning bracket based on photographic scanning technique, including bracket base and fixed type frame, workpiece to be scanned can be put
It is placed in the fixed type frame, it is characterised in that: the top of the bracket base is equipped with several datum holes, the fixed type frame
Equipped with the positioning pin that workpiece to be scanned is fixed, the fixed is provided with the reference pads being supported to workpiece to be scanned
Piece.
2. as described in claim 1 based on the scanning bracket of photographic scanning technique, it is characterised in that: the bracket base is also set
There is support rod, the support rod and the fixed type frame support connect.
3. as described in claim 1 based on the scanning bracket of photographic scanning technique, it is characterised in that: the table of the fixed type frame
Face and theoretical work piece inner surface gap are a fixed values.
4. as described in claim 1 based on the scanning bracket of photographic scanning technique, it is characterised in that: the benchmark gasket is can
The benchmark gasket of disassembly.
5. a kind of scan method using the scanning bracket described in claim 1 based on photographic scanning technique, which is characterized in that packet
Include following steps:
Scan templates establishment step: being arranged reference point on bracket, obtains the datum hole of the bracket, with reference to point data and described
The three-dimensional data of type frame, and will be generated after the fitting of the three-dimensional data on the bracket datum hole and reference point data through type frame surface
Suitable for scanning the scan templates of workpiece；
Workpiece scanning step: workpiece to be scanned is scanned workpiece in multiple directions using scanner and generates workpiece
The complete three-dimensional data in surface；
Scanning result processing step: after the result that the workpiece scanning step is generated carries out gridding processing, with theoretical digital-to-analogue
It is compared.
6. scan method as claimed in claim 5, it is characterised in that: the scan templates establishment step the following steps are included:
Reference point setting steps: before scanning work starts, reference point is sticked to bracket and carries out tomography scan, pastes the position of reference point
Set the region including not covered by workpiece around datum hole, on the surface of the side of fixed type frame and fixed type frame, and
Adapter for acquiring the actual element point of datum hole is installed around datum hole；
Bracket base photography step: it is photographed using the photographic instrument of scanner to stationary plane and fixed type frame, by obtaining
Multiple pictures from different directions are taken to generate complete reference point information；
Bracket scanning step: three dimensional data collection is carried out using surface of the scanner to fixed type frame；
Actual element point fit procedure: one is imported in the file of the three-dimensional digital model comprising reference point data and fixed type frame
The gross data on a fixation type frame surface comprising vehicle body coordinate system, is intended on the basis of the gross data for fixing type frame surface
It closes, constructs collector datum hole actual element point collected, and it is right to calculate in vehicle body coordinate system actual element point institute
The coordinate value answered；
Reference Transforming Coordinate generation step: the file of the three-dimensional digital model comprising reference point data and fixed type frame is reverted to
Only comprising datum hole and with reference to the scanning step of point data, the coordinate value of the datum hole actual element point obtained with above-mentioned steps is
Benchmark is fitted again, and the actual element point of reference point and datum hole that bracket photography step obtains is fitted to vehicle body by system
Coordinate system, to generate the template for being suitable for scanning workpiece.
7. scan method as claimed in claim 5, it is characterised in that: the workpiece scanning step the following steps are included:
Spraying imaging agent step: imaging agent is sprayed on the surface of workpiece to be scanned；
Workpiece scanning step: the workpiece for coating imaging agent is fixed on the positioning pin, using scanner in multiple directions
The workpiece for being fixed on the positioning pin is scanned and generates the complete three-dimensional data of workpiece surface.
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 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654506.2A CN109115112B (en) | 2018-06-22 | 2018-06-22 | Scanning support and scanning method thereof |
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| CN109115112A true CN109115112A (en) | 2019-01-01 |
| CN109115112B CN109115112B (en) | 2022-01-18 |
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| CN201810654506.2A Active CN109115112B (en) | 2018-06-22 | 2018-06-22 | Scanning support and scanning method thereof |
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Cited By (2)
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| 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 |
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| Publication number | Publication date |
|---|---|
| CN109115112B (en) | 2022-01-18 |
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