CN206523142U - Strip width measuring system camera pixel dimension calibrating installation - Google Patents
Strip width measuring system camera pixel dimension calibrating installation Download PDFInfo
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- CN206523142U CN206523142U CN201720108411.1U CN201720108411U CN206523142U CN 206523142 U CN206523142 U CN 206523142U CN 201720108411 U CN201720108411 U CN 201720108411U CN 206523142 U CN206523142 U CN 206523142U
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Abstract
The utility model provides a kind of strip width measuring system camera pixel dimension calibrating installation, including camera, stripe shape light source, industrial computer, lines laser generator and support；Support is made up of column, support column, cross bar and crossbeam, 2 support columns are respectively provided with roller-way both sides, 2 support columns connect to form " well " cabinet frame by 2 cross bars, each equal root post of chain intermittent weld 2 in the middle part of " well " cabinet frame, the corresponding column top in roller-way both sides is separately fixed at across 2 crossbeam two ends above roller-way, wherein：2 frame cameras are housed, every frame camera both sides are separately installed with a lines laser generator on a piece crossbeam；Stripe shape light source corresponding with camera position is installed on another crossbeam；Camera and lines laser generator are connected with industrial computer.The utility model can be calibrated easily and efficiently to pixel dimension data again, so as to correct camera pixel dimension error caused by the distance change of CCD cameras and strip.
Description
Technical field
The utility model belongs to strip width fields of measurement, and in particular to a kind of strip width measuring system camera pixel chi
Spend calibrating installation.
Background technology
In modern metallurgy industry, strip width measurement has become the important step in production and quality control.Strip is given birth to
During production, with the introduction of numerous Controlling models, strip width as model parameter need in real time, be accurately transmitted to model
In, and then control action is played to mill milling.Wherein using CCD cameras are to strip IMAQ and carry out surveying wide width
E measurement technology, due to untouchable, precision is high, real-time is good the characteristics of and be increasingly widely applied.
The general principle measured using linear CCD camera strip width is：Strip is gathered with linear CCD camera
Image, and carry out image procossing and determine the position of the edge of strip in the picture and correspondence width in camera imaging sensor
In pixel quantity, it is known that the yardstick data i.e. length ruler in the linear CCD camera being determined in advance representated by each pixel
Very little data, so apply pixel quantity and pixel dimension data to obtain strip width value.
During linear CCD camera collection strip image, the size that camera gathers strip image can be by line
Scan CCD cameras and the influence of strip distance change.I.e. in strip width measurement, each pixel institute's generation in linear CCD camera
The yardstick data of table are that length dimension data are influenceed by the distance of camera and strip.Shaking due to strip in production process
The distance of the dynamic, change of slackness or other certain reasons, linear CCD camera and strip can produce variation, if still should
It will cause measurement error with original pixel dimension data.Surveyed at present in related strip in wide system, to camera pixel dimension
Verification need to allow output strip line to shut down, while verified using instruments such as Special measuring scales by person skilled, or
Wide linear CCD camera, which is surveyed, using two sets of strips carries out contrast verification.The former, which wastes time and energy, also delays production, latter increases band
Steel surveys the cost of wide system.
The content of the invention
The purpose of this utility model is that in the way of relatively low cost, conveniently pixel dimension data are carried out again
Calibration, so as to correct camera pixel dimension error caused by the distance change of camera and strip.
For up to this purpose, the technical solution that the utility model is taken is：
A kind of strip width measuring system camera pixel dimension calibrating installation, the two of camera in strip width measuring system
Side, which is respectively mounted, can produce the laser generator of high brightness lines.Strip width measuring system after laser generator is installed such as
Shown in Fig. 1 and Fig. 2.The main member of the system includes：Camera, stripe shape light source, industrial computer, lines laser generator and branch
Frame；Support is made up of column, support column, cross bar and crossbeam, and 2 support columns are respectively provided with roller-way both sides, and 2 support columns pass through 2
Root cross bar connects to form " well " cabinet frame, the equal root post of chain intermittent weld 2 in the middle part of each " well " cabinet frame, across 2 above roller-way
Root crossbeam two ends are separately fixed at the corresponding column top in roller-way both sides, wherein：2 frame cameras, every frame picture are housed on a piece crossbeam
Machine both sides are separately installed with a lines laser generator；Stripe shape light corresponding with camera position is installed on another crossbeam
Source；Camera and lines laser generator are connected with industrial computer.
The camera is linear CCD camera.
What the both sides of the camera in above-mentioned were respectively mounted can produce the laser generator of high brightness lines, as shown in Figure 3：Picture
Width is fixed value between the laser generator of machine both sides, and the high brightness lines sent can be collected by camera all the time, as
The high brightness lines that the laser generator of machine both sides is sent straight down and are parallel to each other, and with the horizontal arrangement direction of camera
Vertically.
A kind of above-mentioned strip width measuring system camera pixel dimension calibrating installation, the laser generators of camera both sides it
Between developed width fixed value be L.Such as Fig. 4, make high brightness lines that laser generator sent straight down and be parallel to each other,
Laser rays stripe pitch is also L all the time.Laser line image is collected in line scanning camera ccd sensor in a horizontal manner,
Pixel quantity in online scanning camera ccd sensor between the location of pixels of two laser lines is M.Then camera pixel dimension value
For L/M.Width L is fixed value wherein between laser lines, is not changed.And two laser lines in line scanning camera ccd sensor
Between pixel quantity be M, can be changed with measured strip distance change due to camera.Therefore recalculating L/M makes camera picture
Plain yardstick is corrected.
The beneficial effects of the utility model are：
The utility model is by camera to the collection and processing of highlighted laser lines in strip image come to camera pixel
Yardstick data are calibrated, when the distance of camera and strip changes, can be easily and efficiently again to pixel dimension number
According to being calibrated, so as to correct camera pixel dimension error caused by the distance change of CCD cameras and strip.
Brief description of the drawings
Fig. 1 is calibrating installation schematic side view；
Fig. 2 is calibrating installation schematic front view.
Fig. 3 is the high brightness laser lines strip image schematic diagram of camera collection
Fig. 4 is laser lines and location of pixels relation schematic diagram in camera ccd sensor
Fig. 5 is camera pixel dimension checking routine flow chart
In figure：Camera 1, stripe shape light source 2, column 3, strip 4, roller-way 5, support column 6, cross bar 7, industrial computer 8, lines
High brightness lines 11 that laser generator 9, crossbeam 10, laser generator are sent, first scanning camera imaging sensor 12, image
Location of pixels 13 in sensor.
Embodiment
From accompanying drawing, the utility model strip width measuring system camera pixel dimension calibrating installation, repacking strip is wide
Measuring system is spent, the both sides of camera, which are respectively mounted, in systems can produce the laser generator of high brightness lines.Laser is installed
Strip width measuring system after generator includes camera 1, stripe shape light source 2, industrial computer 8, lines laser generator 9 and branch
Frame.Carriage support is made up of column 3, support column 6, cross bar 7 and crossbeam 10；2 support columns 6,2 are respectively provided with the both sides of roller-way 5
Root support column 6 forms " well " cabinet frame by 2 connections of cross bar 7, in the equal root post of chain intermittent weld 2 in middle part of each " well " cabinet frame
3, the top of the corresponding column 3 in the both sides of roller-way 5 is separately fixed at across the two ends of 2 crossbeams 10 in the top of roller-way 5, wherein：
2 frame cameras 1 are housed, camera 1 uses linear CCD camera, and the both sides of every frame camera 1 are separately installed with one on a piece crossbeam 10
Lines laser generator 9；Stripe shape light source 2 corresponding with the position of camera 1 is installed on another crossbeam 10；Camera 1 and lines swash
Optical generator 9 is connected with industrial computer 8.Industrial computer 8 can be controlled to lines laser generator 9, and be passed through
Camera 1 gathers the image of strip 4.
The program circuit of industrial computer 8 that the collection of image is verified with the pixel dimension of camera 1 is：
1. it is L to initialize actual value between laser lines；2. opening laser generator projects highlighted laser lines；3. camera is adopted
Collection is projected the band steel plate image of laser lines；4. pair laser lines make the center that micronization processes obtain laser lines；5.
Determine row location of pixels and pixel quantity M between them in laser lines correspondence camera；6. it is L/M to verify pixel dimension value.
Width L is fixed value, the high brightness line for being sent laser generator 9 between the laser generator 9 of the both sides of camera 1
Bar straight down and is parallel to each other, and laser rays stripe pitch is also L all the time.Laser line image is collected line and swept in a horizontal manner
Retouch in camera ccd sensor, the pixel quantity in online scanning camera ccd sensor between the location of pixels of two laser lines
For M, then the pixel dimension value of camera 1 is L/M.Width L is fixed value wherein between laser lines, is not changed.And line scanning camera
Pixel quantity is M between two laser lines in ccd sensor, can be changed due to camera 1 with the measured distance change of strip 4
Become.Therefore recalculating L/M enables the pixel dimension of camera 1 to correct.
Claims (2)
1. strip width measuring system camera pixel dimension calibrating installation, including roller-way, it is characterised in that repacking strip width is surveyed
Amount system, the both sides of camera, which are respectively mounted, in systems can produce the laser generator of high brightness lines, install laser
Strip width measuring system after device；The main member of the system includes：Camera, stripe shape light source, industrial computer, lines laser
Generator and support；Support is made up of column, support column, cross bar and crossbeam, and 2 support columns, 2 branch are respectively provided with roller-way both sides
Dagger connects to form " well " cabinet frame by 2 cross bars, the equal root post of chain intermittent weld 2 in the middle part of each " well " cabinet frame, across in roller
2 crossbeam two ends above road are separately fixed at the corresponding column top in roller-way both sides, wherein：2 frame pictures are housed on a piece crossbeam
Machine, every frame camera both sides are separately installed with a lines laser generator；It is installed on another crossbeam corresponding with camera position
Stripe shape light source；Camera and lines laser generator are connected with industrial computer.
2. strip width measuring system camera pixel dimension calibrating installation according to claim 1, it is characterised in that described
Camera is linear CCD camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720108411.1U CN206523142U (en) | 2017-02-05 | 2017-02-05 | Strip width measuring system camera pixel dimension calibrating installation |
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| CN201720108411.1U CN206523142U (en) | 2017-02-05 | 2017-02-05 | Strip width measuring system camera pixel dimension calibrating installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113516775A (en) * | 2021-02-09 | 2021-10-19 | 天津大学 | Three-dimensional reconstruction method for acquiring stamp auxiliary image by mobile phone camera |
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2017
- 2017-02-05 CN CN201720108411.1U patent/CN206523142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113516775A (en) * | 2021-02-09 | 2021-10-19 | 天津大学 | Three-dimensional reconstruction method for acquiring stamp auxiliary image by mobile phone camera |
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