CN108627094A - A kind of 3D laser measurement methods of parts height dimension - Google Patents
A kind of 3D laser measurement methods of parts height dimension Download PDFInfo
- Publication number
- CN108627094A CN108627094A CN201710153225.4A CN201710153225A CN108627094A CN 108627094 A CN108627094 A CN 108627094A CN 201710153225 A CN201710153225 A CN 201710153225A CN 108627094 A CN108627094 A CN 108627094A
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- China
- Prior art keywords
- point
- image
- laser
- relative altitude
- measured
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Classifications
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
-
- 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
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of 3D laser measurement methods of parts height dimension, include the following steps：3D laser cameras are configured, image template is established, acquire pixel grey scale data, obtain relative altitude pixel, calculate relative altitude value, calculate management and control size.The measurement method of the present invention can accurately find out the three-dimensional management and control size of workpiece for measurement.
Description
Technical field
The present invention relates to industrial automation detections, and in particular to a kind of 3D laser measurement methods of parts height dimension.
Background technology
With the development of state-of-the-art technology, the development of industrial automation technology is also getting faster, in the big of industry 4.0
Under trend, the demand now to industrial automation detection technique is more and more, and the requirement to industrial automation detection is also increasingly
Strictly.
Currently, industrial circle, especially 3C (Computer computers, Communication communications and
ConsumerElectronic consumption electronic products) market, be still with artificial detection in the height dimension context of detection of product
Main, main measurement means include high metric, dot laser, and universal measurement method is that direct Point Measurement reads data.It is this
It measures and is limited by equipment, the test gimmick of tester of measurement, precision is relatively low, and the stability of measurement is bad, usually uses pair
Same size repeatedly measures, and the method for taking optimal value carries out quality management and control to the size of product, lacks science, reasonably detection
Means, there are the waste of larger manpower and quality risks.3D laser is widely used in height dimension with its outstanding stability
It measures.But conventional measurement scheme is still to directly read based on data, and the result of such method is under certain size management and control
It is unstable.Therefore, to realize that real high-precision, high stability, 3D laser measurement schemes are urgently optimised.
Invention content
The purpose of the present invention is to provide a kind of 3D laser measurement methods of parts height dimension, it can accurately be asked
Go out the three-dimensional management and control size of workpiece for measurement.
Realizing the technical solution of above-mentioned purpose is：A kind of 3D laser measurement methods of parts height dimension, including it is following
Step：
A, 3D laser cameras are configured, 3D laser cameras and kinetic control system is matched, is wanted according to the resolution ratio of the direction of motion
Ask the suitable triggering pattern of setting and sampling period；
B, image template is established, workpiece for measurement is placed into the normal place below 3D laser cameras, is taken pictures, obtains 16
Gray level image establishes image template with the image for acquisition of taking pictures, and marks the point of reference plane on the image of the image template
Position and each point to be measured；
C, pixel grey scale data are acquired, triggering 3D laser camera gathered datas are accurately positioned and wait for using image matching technology
Workpiece is surveyed, obtains the location of pixels of the point and each point to be measured of reference plane in present image using affine transformation, and read
Take the point of reference plane and the grey scale pixel value of each point to be measured；
D, relative altitude pixel is obtained, first takes the point of reference plane to be fitted datum plane, generates the image of reference plane, it will be former
The image that the image collected subtracts reference plane obtains the relative altitude pixel of each point to be measured；
E, relative altitude value is calculated, using the calibration value of 3D laser, the relative altitude pixel based on each tested point calculates
The practical relative altitude value of each point；
F, management and control size is calculated, based on the relative altitude value of each point to be measured, calculates institute's pipe in need on workpiece for measurement
The specific size of control.
The 3D laser measurement methods of above-mentioned parts height dimension, wherein described to need the specific size of management and control to include
Flatness, difference in height.
The beneficial effects of the invention are as follows：It can accurately find out the three-dimensional management and control size of workpiece for measurement, and precision is high,
Robustness is high, can greatly improve production efficiency and the degree of automation of production.
Description of the drawings
Fig. 1 is the flow chart of the 3D laser measurement methods of the parts height dimension of the present invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings.
Referring to Fig. 1, the 3D laser measurement methods of the parts height dimension of the present invention, include the following steps：
A, 3D laser cameras are configured, 3D laser cameras and kinetic control system is matched, is wanted according to the resolution ratio of the direction of motion
Ask the suitable triggering pattern of setting and sampling period；
B, image template is established, workpiece for measurement is placed into the normal place below 3D laser cameras, is taken pictures, obtains 16
Gray level image establishes image template with the image for acquisition of taking pictures, and marks the point of reference plane on the image of the image template
Position and each point to be measured；
C, pixel grey scale data are acquired, triggering 3D laser camera gathered datas are accurately positioned and wait for using image matching technology
Workpiece is surveyed, obtains the location of pixels of the point and each point to be measured of reference plane in present image using affine transformation, and read
Take the point of reference plane and the grey scale pixel value of each point to be measured；
D, relative altitude pixel is obtained, first takes the point of reference plane to be fitted datum plane, generates the image of reference plane, it will be former
The image that the image collected subtracts reference plane obtains the relative altitude pixel of each point to be measured；
E, relative altitude value is calculated, to reduce measurement error, using the calibration value of 3D laser, the phase based on each tested point
The practical relative altitude value of each point is calculated height pixel；
F, management and control size is calculated, the relative altitude value based on each tested point calculates institute's management and control in need on workpiece for measurement
Specific size, such as flatness, difference in height.
Above example is used for illustrative purposes only rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various transformation or modification, therefore all equivalent
Technical solution should also belong to scope of the invention, should be limited by each claim.
Claims (2)
1. a kind of 3D laser measurement methods of parts height dimension, which is characterized in that include the following steps：
A, 3D laser cameras are configured, 3D laser cameras and kinetic control system is matched, is set according to the resolution requirement of the direction of motion
Set suitable triggering pattern and sampling period；
B, image template is established, workpiece for measurement is placed into the normal place below 3D laser cameras, is taken pictures, obtains 16 gray scales
Image establishes image template with the image for acquisition of taking pictures, and mark on the image of the image template point of reference plane with
And each point to be measured；
C, pixel grey scale data are acquired, triggering 3D laser camera gathered datas are accurately positioned work to be measured using image matching technology
Part obtains the location of pixels of the point and each point to be measured of reference plane in present image using affine transformation, and reads base
The grey scale pixel value of the point in quasi- face and each point to be measured；
D, relative altitude pixel is obtained, first takes the point of reference plane to be fitted datum plane, generates the image of reference plane, original is acquired
To image subtract the image of reference plane and obtain the relative altitude pixel of each point to be measured；
E, relative altitude value is calculated, using the calibration value of 3D laser, the relative altitude pixel based on each tested point calculates each
The practical relative altitude value of point；
F, calculate management and control size, based on the relative altitude value of each point to be measured, calculate on workpiece for measurement management and control in need
Specific size.
2. the 3D laser measurement methods of parts height dimension according to claim 1, which is characterized in that described to need pipe
The specific size of control includes flatness, difference in height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153225.4A CN108627094A (en) | 2017-03-15 | 2017-03-15 | A kind of 3D laser measurement methods of parts height dimension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153225.4A CN108627094A (en) | 2017-03-15 | 2017-03-15 | A kind of 3D laser measurement methods of parts height dimension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108627094A true CN108627094A (en) | 2018-10-09 |
Family
ID=63687359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710153225.4A Pending CN108627094A (en) | 2017-03-15 | 2017-03-15 | A kind of 3D laser measurement methods of parts height dimension |
Country Status (1)
| Country | Link |
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| CN (1) | CN108627094A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397516A (en) * | 2020-04-03 | 2020-07-10 | 哈尔滨市科佳通用机电股份有限公司 | Device and method for measuring height of signal receiving coil of railway locomotive |
| CN115615318A (en) * | 2022-09-23 | 2023-01-17 | 温州市工业科学研究院 | High-precision motion platform for expanding image size measurement range |
-
2017
- 2017-03-15 CN CN201710153225.4A patent/CN108627094A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397516A (en) * | 2020-04-03 | 2020-07-10 | 哈尔滨市科佳通用机电股份有限公司 | Device and method for measuring height of signal receiving coil of railway locomotive |
| CN115615318A (en) * | 2022-09-23 | 2023-01-17 | 温州市工业科学研究院 | High-precision motion platform for expanding image size measurement range |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181009 |
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| WD01 | Invention patent application deemed withdrawn after publication |