CN110455193A - Paper roll breadth and diameter measuring method based on MATLAB - Google Patents
Paper roll breadth and diameter measuring method based on MATLAB Download PDFInfo
- Publication number
- CN110455193A CN110455193A CN201910714640.1A CN201910714640A CN110455193A CN 110455193 A CN110455193 A CN 110455193A CN 201910714640 A CN201910714640 A CN 201910714640A CN 110455193 A CN110455193 A CN 110455193A
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- China
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- paper roll
- matlab
- breadth
- optoelectronic switch
- digital camera
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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
-
- 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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Paper roll breadth and diameter measuring method based on MATLAB, including digital camera, optoelectronic switch, same color label paper, MATLAB software, industrial control computer, shifting carrying platform, programmable controller, programmable controller is connected by cable with the industrial control computer on ground, digital camera is connected with industrial control computer, and optoelectronic switch is connected by cable with programmable controller.Optoelectronic switch is mounted on the ideal position that paper roll needs to stop, running track of the detection light perpendicular to shifting carrying platform by Pillar stand using mirror reflection.The present invention is based on the shifting carrying platform width measuring systems of digital camera and MATLAB can not only accurately measure paper roll breadth, and system is reliable and stable, positioning accuracy is high, at low cost.
Description
Technical field
The invention belongs to conveying equipment automation fields, and in particular to cargo is on straight line shifting carrying platform in transportation system
The measurement method of breadth detection.
Background technique
Currently, measuring paper roll breadth on shifting carrying platform often there are two types of mode, first way is with laser ranging
Instrument, by adjusting the position of good rangefinder, infrared laser irradiates paper roll, when in paper roll moving process meeting there are two when end face away from
From, then by geometry calculating, obtain paper roll breadth.This method precision is higher, fast speed, but expensive, and setting is difficult；
The second way is to place optoelectronic switch on load transfer station with optoelectronic switch, start timing when having detected that paper roll passes through,
When paper roll is detached from optoelectronic switch irradiation, stop timing.The breadth of paper roll is finally calculated according to the speed of shifting carrying platform.It is this
Method is succinct.It is cheap, but suffer from that external influence is bigger, for example whether the speed of shifting carrying platform is constant, photoelectricity
Switch whether the interference etc. by other objects.And complicated logical function programming is needed, response is also extremely difficult in real time
Property.It is only applicable to the occasion not high to required precision in this way.
The mode that reel diameter is measured on transplanting platform mainly places laser range finder above paper roll, when paper roll does not have
Have by when, the distance of laser range finder is the distance to chain scraper conveyor, and when paper roll passes through, the distance of measurement is Laser Measuring
Distance meter to paper roll distance, the two subtract each other be exactly paper roll diameter.
Summary of the invention
The present invention is intended to provide a kind of method that the paper roll based on MATLAB surveys breadth and diameter, the method precision is high, if
It sets simply, cheap, real-time is good, can be suitable for rectilinear orbit, the measurement suitable for regular shape cargo.
The purpose of the present invention is realized through the following technical scheme:
Paper roll breadth and diameter measuring method based on MATLAB, including digital camera, optoelectronic switch, red-ticket paper,
MATLAB software, industrial control computer, shifting carrying platform, programmable controller, programmable controller pass through on cable and ground
Industrial control computer be connected, digital camera is connected with industrial control computer, optoelectronic switch pass through cable and programmable control
Device processed is connected, and optoelectronic switch makes paper roll be parked in fixed position by detection, and feeds back to programmable controller trigger signal, can compile
The signal that range controller PLC receives optoelectronic switch is sent to industrial personal computer reads paper roll breadth and diameter data signal.Before this,
Industrial control computer is analyzed and processed the photo that digital camera sends over by MATLAB software, calculates paper roll width
Wide and diameter information, waits programmable controller to read data.It is characterized by: digital camera is mounted on the upper of whole device
Side is used to acquire the image of equipment, and then analytical calculation goes out the breadth of paper roll；Optoelectronic switch passes through column using mirror reflection
Bracket is mounted on the ideal position that paper roll needs to stop, running track of the detection light perpendicular to shifting carrying platform.It is characterized by:
The top that digital camera is mounted on integral device is used to acquire equipment image；Optoelectronic switch is mounted on paper roll by Pillar stand
The ideal position for needing to stop, running track of the detection light perpendicular to shifting carrying platform.
Paper roll breadth and diameter measuring method based on MATLAB, comprising the following steps:
(1) digital camera is acquired field device image, and is sent to industrial control computer in real time；
(2) different according to the gray value of two labels in collected picture, calculate the distance X of two labels2；
(3) it is X that paper roll stop position, that is, mirror reflection optoelectronic switch to label A distance, which is fixation,1, paper roll breadth=X2-X1；
(4) MATLAB calculates paper roll area shared in picture according to the pixel ratio of paper roll；
(5) divided by the breadth of paper roll be exactly by the area calculated paper roll diameter.
Beneficial effects of the present invention: it by industrial control computer in conjunction with sensor, is calculated using the method for image procossing
The wide data with diameter of paper delivery winding, are then sent to programmable controller, are all carried out by software due to most of, so real
When property is more preferable, cheap；Complete equipment no longer needs manually to participate in, and reaction sensitivity was at 1 second or so, and entire adjustment process is not
It can be more than 5 seconds.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is structure of the invention mechanical part left view.
Fig. 3 is structure of the invention mechanical part top view.
In figure: 1- label A, 2- label B, 3- digital camera, 4- shifting carrying platform, 5- mirror reflection optoelectronic switch, 6- can be compiled
Range controller, 7- industrial control computer, 8- paper roll, X1Distance of the optoelectronic switch to label A, X2Label B to label A away from
From.
Specific embodiment
The present invention will be further described below with reference to the drawings.
As shown in Figure 1, paper roll breadth and diameter measuring method based on MATLAB, including 1- label A, 2- label B, 3- number
Code camera, 4- shifting carrying platform, 5- mirror reflection optoelectronic switch, 6- programmable controller, 7- industrial control computer, 8- paper roll.
7- industrial control computer on 6- programmable controller, 3- digital camera and ground communicates, and 5- mirror reflection optoelectronic switch is logical
Cable is crossed to be connected with 6- programmable controller.3- digital camera is mounted on above 8- paper roll, and 2- optoelectronic switch is mounted on desired paper
The position stopped being rolled up, and detecting light will be perpendicular to the running track of 4- shifting carrying platform.Due to 5- mirror reflection optoelectronic switch
It can be fixed on 4- shifting carrying platform, thus it is not restricted to shifting carrying platform, it is conveyed including chain scraper conveyor, roller
Machine, chain making machine etc..3- digital camera passes through the 7- industrial control computer phase on cable and ground with 6- programmable controller
Even, the 5- mirror reflection optoelectronic switch is connected by cable with 6- programmable controller.
3- digital camera is mainly acquired image after paper roll is parked in designated position, and acquired image is sent out
Give 7- industrial control computer；5- mirror reflection optoelectronic switch is used to that paper roll is made to be parked in ideal position, anti-by detection paper roll
It feeds 6- programmable controller, 6- programmable controller issues reading order to 7- industrial control computer, reads paper roll breadth
Data；7- industrial control computer executes specific program (see herein below) to collected by the MATLAB software of installation
Image is handled, and the breadth of paper roll is calculated, and is passed data to and can be compiled after waiting 6- programmable controller to issue read command
Range controller；5- mirror reflection optoelectronic switch is mounted on the ideal position that paper roll needs to stop by bracket, and detection light is vertical
In the running track of 4- shifting carrying platform.
Paper roll breadth and diameter measuring method based on MATLAB, comprising the following steps:
(1) digital camera is acquired field device image, and is sent to industrial control computer in real time；
(2) different according to the gray value of two labels in collected picture, calculate the distance X of two labels2；
(3) it is X that paper roll stop position, that is, mirror reflection optoelectronic switch to label A distance, which is fixation,1, paper roll breadth=X2-X1；
(4) MATLAB calculates paper roll area shared in picture according to the pixel ratio of paper roll；
(5) divided by the breadth of paper roll be exactly by the area calculated paper roll diameter.
The picture color of specific position is different from other positions in the collected picture of step (2) digital camera, meeting in this way
Facilitate MATLAB to image procossing.Step (3) is the key that entirely to design, and the software section entirely designed passes through setting
Good logical program, is just able to achieve paper roll precise calibration.
In step (4), there are mapping relations with actual paper roll for the breadth of paper roll and diameter in picture, so needing to carry out
Conversion.Specific conversion method is as follows: firstly, should all shoot several groups of test pictures before formal investment, find digital camera
Optimum position.Then, the actual breadth of paper roll and diameter are measured, measures paper roll in picture further according to industrial personal computer MATLAB
Breadth and diameter, in the case where digital camera position is constant, there are mapping relations with actual numerical value for the numerical value in picture.
Finally, calculate mapping ratio, this numerical value be it is fixed, being multiplied with the numerical value in picture is exactly the actual size of paper roll.
The MATLAB program of whole work process:
Photograph=imread(‘TP.png');% reads collected picture
Start.Abs=constant;% is manually entered label A abscissa
Start.Ord=constant;% is manually entered the ordinate of label A
CropRGB=RGB(Start.Abs:200, Start.Ord:500 :);% segmented image region
[X,Y]=SIZE(H) ;% determines the position (only first of optoelectronic switch
Secondary use)
For i=1:X;
If H((X+1-i),Y)==Z;%Z is that light prescribes gray value
U=X+1-i;
V=Y;
Break;
End;
[M,N]=SIZE(I);% determines the position of label B
For j=1:M;
If I ((M+1-j), N)==label B point gray value
E=M+1-j;
F=N;
Break;
End;
X3=U-E;%X3 is paper roll breadth
Photograph=imread(‘TP.png');% reads collected picture
I=rgb2gray(Photograph) ;% is converted into bianry image
[m,n]=size(I);The length and width of % reading pixel
count=m*n;% calculates the number of pixel
White_count=length (find (I==0)) % filters out white area number of pixels
Ratio shared by White_precent=(White_count)/(count) % white pixel
Area=(White_precent) * A*B %A is photo area (known)
%B is the mapping of photo area and real area
Diameter=(Area)/(X3) % calculates reel diameter.
The present invention can accurately measure paper roll breadth and diameter, and due to cheap, strong real-time can be applied on various occasions,
By experimental comparison repeatedly, the method for paper roll survey breadth of the set based on MATLAB is after calibration within the reachable ± 20mm of measurement accuracy.
Claims (2)
1. paper roll breadth and diameter measuring method based on MATLAB, including digital camera, optoelectronic switch, same color label
Paper, MATLAB software, industrial control computer, shifting carrying platform, programmable controller, programmable controller pass through cable and ground
On industrial control computer be connected, digital camera is connected with industrial control computer, optoelectronic switch by cable and may be programmed
Controller is connected, and optoelectronic switch makes paper roll be parked in fixed position by detection, and feeds back to programmable controller trigger signal, can
The signal that programmable controller PLC receives optoelectronic switch is sent to industrial personal computer reads paper roll breadth and diameter data signal；Herein it
Before, industrial control computer is analyzed and processed the photo that digital camera sends over by MATLAB software, calculates paper delivery
Winding is wide and diameter information, waiting programmable controller read data, it is characterised in that: digital camera is mounted on whole device
Top is used to acquire the image of equipment, and then goes out the breadth and diameter of paper roll by MATLAB analytical calculation；Optoelectronic switch uses
Mirror reflection is mounted on the ideal position that paper roll needs to stop by Pillar stand, and detection light is parallel to the fortune of shifting carrying platform
Row track.
2. paper roll breadth and diameter measuring method based on MATLAB, it is characterised in that the following steps are included:
(1) digital camera is acquired field device image, and is sent to industrial control computer in real time；
(2) different according to the gray value of two labels in collected picture, calculate the distance X of two labels2；
(3) it is X1, paper roll breadth=X that paper roll stop position, that is, mirror reflection optoelectronic switch to label A distance, which is fixation,2-X1；
(4) MATLAB calculates paper roll area shared in picture according to the pixel ratio of paper roll；
(5) divided by the breadth of paper roll be exactly by the area calculated paper roll diameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910714640.1A CN110455193A (en) | 2019-08-04 | 2019-08-04 | Paper roll breadth and diameter measuring method based on MATLAB |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910714640.1A CN110455193A (en) | 2019-08-04 | 2019-08-04 | Paper roll breadth and diameter measuring method based on MATLAB |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156947A (en) * | 2020-02-07 | 2020-05-15 | 长沙长泰智能装备有限公司 | Paper roll diameter measuring device and measuring method |
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| JPH11183155A (en) * | 1997-12-24 | 1999-07-09 | Meisan Kk | Method and apparatus with improved measurement accuracy for measuring sheet thickness |
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| CN111156947A (en) * | 2020-02-07 | 2020-05-15 | 长沙长泰智能装备有限公司 | Paper roll diameter measuring device and measuring method |
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Application publication date: 20191115 |