CN108507472A - A kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method - Google Patents
A kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method Download PDFInfo
- Publication number
- CN108507472A CN108507472A CN201810222752.0A CN201810222752A CN108507472A CN 108507472 A CN108507472 A CN 108507472A CN 201810222752 A CN201810222752 A CN 201810222752A CN 108507472 A CN108507472 A CN 108507472A
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- Prior art keywords
- sealing
- paper used
- strip
- air bag
- image
- 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.)
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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
- G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
- G01B11/043—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring length
-
- 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
- G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
- G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width
-
- 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
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0025—Measuring of vehicle parts
Abstract
The invention belongs to auto parts product testing fields, are related to a kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method.Line-scan digital camera is used to acquire image first, the operation of activation system, torque motor makes absolute value formula incremental encoder send out pulse to data collecting card, and then triggers line-scan digital camera and be scanned to obtain complete air bag strip of paper used for sealing image line by line.Image information is reached upper computer module by image capture module after the completion of taking phase, carries out data processing in upper computer module, two long side straight line L of strip of paper used for sealing are gone out by least square fitting1、L2, two broadside straight line L of strip of paper used for sealing3、L4, be spaced strip of paper used for sealing close to strip of paper used for sealing broadside L5, L is then measured by image processing algorithm1、L2The distance between D1,2, L3、L4The distance between D3,4, L2、L5Between distance D2,5, show the data result of detection and preserve data.The detection method of the present invention can realize that the contactless of safe automobile air bag strip of paper used for sealing size detects quickly, accurately, automatically.
Description
Technical field
The invention belongs to auto parts Product Visual detection fields, and it is non-contact to be related to a kind of safe automobile air bag strip of paper used for sealing size
Formula visible detection method.
Background technology
With the fast development of China's advanced manufacturing technology and the reduction of automobile making cost, day of the automobile in people
It is often largely popularized in life, is brought great convenience to the go off daily of people.
An important component of the air bag strip of paper used for sealing as air bag, the quality of production directly affect the peace of air bag
It entirely uses, if strip of paper used for sealing length, width, strip of paper used for sealing spacing equidimension go beyond the scope, it will influence air bag in case of emergency
Normal pop-up.Traditional air bag strip of paper used for sealing dimensional measurement is manually to be measured using survey tools such as vernier calipers, there is inspection
The drawbacks of surveying inaccurate, inefficiency.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of, the air bag strip of paper used for sealing dimensional measurement based on machine vision is non-contact
Formula visible detection method.
The technical solution adopted in the present invention is：
A kind of air bag strip of paper used for sealing size non-contact vision detection device, including image capture module and motion control mould
Block；The image capture module includes line-scan digital camera, linear array camera lens, light source and data collecting card, and the installation of linear array camera lens is online
On array camera, light source installation irradiating angle includes the acquisition visual field of entire line-scan digital camera, and line-scan digital camera is logical by Camera Link
News agreement is connected on the data collecting card in industrial control computer PCI slot；The motion-control module includes torque
Motor, encoder, CMOS photoelectric sensors and PLC, industrial control computer are communicated by I/O with PLC and are connected；Torque motor is used
Motor speed is measured and is sent to data collecting card corresponding in driving strip of paper used for sealing conveyer belt and encoder rotation, encoder
Pulse signal, CMOS photoelectric sensors are connected with the digital quantity input terminal of PLC, the relative position for detecting strip of paper used for sealing；Linear array phase
Machine completes the acquisition of image according to the pulse signal that the PLC outer triggering signals sent out and data collecting card provide.
Using a kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method of above-mentioned apparatus, steps are as follows：
Step 1：On a moving belt by air bag strip of paper used for sealing patch, and strip of paper used for sealing tie is fixed on two torque motors, is made
Conveyer belt strip of paper used for sealing when running at high speed is moved according to fixed position and track, and strip of paper used for sealing offset is avoided to cause detection image that can not make
With.
Step 2：Image is acquired using line-scan digital camera, the operation of activation system, torque motor makes absolute value formula increment compile
Code device sends out pulse to data collecting card, and then triggers line-scan digital camera and progressively scan to obtain complete air bag strip of paper used for sealing image,
Air bag strip of paper used for sealing image is reached into host computer and carries out data processing.
Step 3：Obtain image after, by the method that sub-pixel measurement cathetus is fitted measure strip of paper used for sealing two long sides,
Two broadsides, be spaced strip of paper used for sealing adjacent broadside size, specific size detection method it is as follows：
(1) go out two long side straight line L of strip of paper used for sealing by least square fitting1(Row11,Column11；Row12,
Column12)、L2(Row21,Column21；Row22, Column22), two broadside straight line L of strip of paper used for sealing3(Row31,Column31；
Row32,Column32)、L4(Row41,Column41；Row42, Column42), interval strip of paper used for sealing close to strip of paper used for sealing broadside L5
(Row51,Column51；Row52,Column52).
(2) L is measured by image processing algorithm1、L2The distance between D1,2, L3、L4The distance between D3,4, L2、L5It
Between distance D2,5。
The calibration and calibration of line-scan digital camera select the gridiron pattern of grid 0.5mm*0.5mm to demarcate version；On the corresponding side of strip of paper used for sealing
Edge region fitting a straight line goes out straight line, total to obtain 5 straight line L1(Row11,Column11；Row12,Column12)、L2
(Row21,Column21；Row22,Column22)、L3(Row31,Column31；Row32,Column32)、L4(Row41,
Column41；Row42,Column42)、L5(Row51,Column51；Row52,Column52).Measure L1、L2Between away from
From D1,2, L3、L4The distance between D3,4, L2、L5Between distance D2,5Meet following relationship with the coordinate of 5 straight lines：
Line-scan digital camera the image collected is calibrated and demarcated, using gamma correction pattern, corrected perspective distortion,
Radial distortion and planar linear distortion, the invariant features point for choosing strip of paper used for sealing carry out matching positioning, obtain the position letter of matching image
Breath.
It is back polishing that the light source, which uses Dome lamps, polishing mode,.
The encoder uses absolute value formula encoder.
A kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method of the present invention, using contactless inspection
It surveys, high degree of automation, operability is strong, saves a large amount of cost of labor, improves measurement accuracy and reliability, and market is answered
With having a extensive future.
Description of the drawings
Fig. 1 is safe automobile air bag strip of paper used for sealing size non-contact vision structure of the detecting device schematic diagram.
Fig. 2 is air bag strip of paper used for sealing detects schematic diagram (comprising 5 straight lines and 3 Length Quantities for needing to be fitted).
Fig. 3 is the detection method flow chart of the present invention.
In Fig. 1：1 line-scan digital camera；2 linear array camera lenses；3 conveyer belts；4 torque motors；5PLC；6 display screens；7 Industry Control meters
Calculation machine；8CMOS sensors；9 encoders；10 light sources.
Specific implementation mode
Specific embodiments of the present invention are described in detail with reference to technical solution and attached drawing.
(1) when starting detection, air bag strip of paper used for sealing is installed in place first, fixes the position of torque motor and acrylic board
It sets, adjusts the speed of the first torque motor, the second torque motor respectively.After formal startup, torque motor drives strip of paper used for sealing conveyer belt
Rotation, for absolute value formula incremental encoder under the traction of strip of paper used for sealing conveyer belt, per revolution transmits 5000 to data collecting card
Pulse, triggering line-scan digital camera shoot complete image.
(2) post processing of image is obtained, the chessboard case marker of 300mm × 300mm specifications is selected in the calibration and calibration of line-scan digital camera
Fixed board, using gamma correction pattern, corrected perspective distortion, plane distortion；It comprises the concrete steps that：Acquisition includes the figure of scaling board
Picture, from different angles capture generate demarcating file by the analysis of the image to acquisition, and demarcating file information is loaded into
Position machine template.
(3) acquisition image and search are positioned after obtaining template, using the side of mapping function offline secure air bag strip of paper used for sealing
Edge feature searches the coordinate information at strip of paper used for sealing edge according to template and the correspondence for matching image.
(4) image procossing uses least square fitting strip of paper used for sealing short side edge in the corresponding fringe region of short side, obtains short
The feature at side edge pair is measured edge and is adjusted the distance D using edge measurement functions of adjusting the distance1,2；It is adopted in the corresponding fringe region of long side
With least square fitting strip of paper used for sealing long side edge, the feature of long side edge pair is obtained, edge is reused and adjusts the distance measurement functions
Edge is measured to adjust the distance D3,4；The broadside for being fitted one of strip of paper used for sealing goes out straight line, again fit interval strip of paper used for sealing close to broadside
It obtains other straight line, the distance D of two sub-pixel edges pair is sought after fitting2,5。
Since non-contact detection equips the artificial deviation that there is a part, so in first round debugging test, need
Baffle, idler wheel, the installation of torque motor mechanical device are fixed, ensure torque motor when running at high speed, air bag strip of paper used for sealing is not
It can be because concussion, offset occur for air drag.Image, the dimension data that host computer can be acquired with real-time display camera, and will count
It retrieves and uses so as to subsequent query according to generation report.
Claims (3)
1. a kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method, which is characterized in that the non-contact vision
The air bag strip of paper used for sealing size non-contact vision detection device that detection method uses, including image capture module and motion control
Module；The image capture module includes line-scan digital camera, linear array camera lens, light source and data collecting card, and linear array camera lens is mounted on
On line-scan digital camera, light source installation irradiating angle includes the acquisition visual field of entire line-scan digital camera, and line-scan digital camera passes through Camera Link
Communications protocol is connected on the data collecting card in industrial control computer PCI slot；The motion-control module includes power
Torque motor, encoder, CMOS photoelectric sensors and PLC, industrial control computer are communicated by I/O with PLC and are connected；Torque motor
For driving strip of paper used for sealing conveyer belt and encoder to rotate, encoder measures motor speed and is sent to data collecting card corresponding
Pulse signal, CMOS photoelectric sensors are connected with the digital quantity input terminal of PLC, the relative position for detecting strip of paper used for sealing；Linear array
Camera completes the acquisition of image according to the pulse signal that the PLC outer triggering signals sent out and data collecting card provide；
It is specific as follows using the safe automobile air bag strip of paper used for sealing size non-contact vision detection method of above-mentioned apparatus：
Step 1：On a moving belt by air bag strip of paper used for sealing patch, and strip of paper used for sealing tie is fixed on two torque motors, makes transmission
Band strip of paper used for sealing when running at high speed is moved according to fixed position and track, and strip of paper used for sealing offset is avoided to cause detection image that can not use；
Step 2：Image is acquired using line-scan digital camera, the operation of activation system, torque motor makes absolute value formula incremental encoder
Pulse is sent out to data collecting card, and then triggers line-scan digital camera and progressively scans to obtain complete air bag strip of paper used for sealing image, will be pacified
Full air bag strip of paper used for sealing image reaches host computer and carries out data processing；
Step 3：Obtain image after, by the method that sub-pixel measurement cathetus is fitted measure strip of paper used for sealing two long sides, two
Broadside, be spaced strip of paper used for sealing adjacent broadside size, specific size detection method it is as follows：
(1) go out two long side straight line L of strip of paper used for sealing by least square fitting1(Row11,Column11；Row12,
Column12)、L2(Row21,Column21；Row22, Column22), two broadside straight line L of strip of paper used for sealing3(Row31,Column31；
Row32,Column32)、L4(Row41,Column41；Row42, Column42), interval strip of paper used for sealing close to strip of paper used for sealing broadside L5
(Row51,Column51；Row52,Column52)；
(2) L is measured by image processing algorithm1、L2The distance between D1,2, L3、L4The distance between D3,4, L2、L5Spacing
From D2,5；
The calibration and calibration of line-scan digital camera select the gridiron pattern of grid 0.5mm*0.5mm to demarcate version；In the corresponding marginal zone of strip of paper used for sealing
Domain fitting a straight line goes out straight line, total to obtain 5 straight line L1(Row11,Column11；Row12,Column12)、L2(Row21,
Column21；Row22,Column22)、L3(Row31,Column31；Row32,Column32)、L4(Row41,Column41；
Row42,Column42)、L5(Row51,Column51；Row52,Column52)；Measure L1、L2The distance between D1,2, L3、
L4The distance between D3,4, L2、L5Between distance D2,5Meet following relationship with the coordinate of 5 straight lines：
Line-scan digital camera the image collected is calibrated and demarcated, using gamma correction pattern, corrected perspective distortion, radial direction
Distortion and planar linear distortion, the invariant features point for choosing strip of paper used for sealing carry out matching positioning, obtain the location information of matching image.
2. a kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method as described in claim 1, feature exist
In it is back polishing that the light source, which uses Dome lamps, polishing mode,.
3. a kind of safe automobile air bag strip of paper used for sealing size non-contact vision detection method as claimed in claim 1 or 2, feature
It is, the encoder uses absolute value formula encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810222752.0A CN108507472B (en) | 2018-03-19 | 2018-03-19 | Non-contact visual detection method for size of automobile safety airbag seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810222752.0A CN108507472B (en) | 2018-03-19 | 2018-03-19 | Non-contact visual detection method for size of automobile safety airbag seal |
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| Publication Number | Publication Date |
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| CN108507472A true CN108507472A (en) | 2018-09-07 |
| CN108507472B CN108507472B (en) | 2020-09-15 |
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ID=63375867
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| CN116907360A (en) * | 2023-08-03 | 2023-10-20 | 苏州苏瑞膜纳米科技有限公司 | RO (reverse osmosis) membrane gel line width detection system and detection method based on machine vision |
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