CN106767434A - A kind of rolling tire tyre surface sliding measuring system and tyre surface sliding measuring method - Google Patents
A kind of rolling tire tyre surface sliding measuring system and tyre surface sliding measuring method Download PDFInfo
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- CN106767434A CN106767434A CN201611210587.4A CN201611210587A CN106767434A CN 106767434 A CN106767434 A CN 106767434A CN 201611210587 A CN201611210587 A CN 201611210587A CN 106767434 A CN106767434 A CN 106767434A
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- tire
- tyre surface
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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
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Abstract
The invention discloses a kind of rolling tire tyre surface sliding measuring system and tyre surface sliding measuring method, system includes tire and glass plate, place tire in glass plate upper surface, the tyre surface of tire is coated with multiple tread labels points, tire controls it to roll by tire rolling control unit, glass plate lower section is provided with the high-speed CCD camera for shooting tread labels point and " contact is left " process atlas of glass plate, and high-speed CCD camera transmits to processor atlas.The present invention, according to sliding field distribution situation of the measured tire under given operating mode, can be used to predict the type and the order of severity that tire imports market initial stage generation abnormal wear for the sliding field measurement in tyre surface ground area during tire rolling.
Description
Technical field
The invention belongs to field of measuring technique, and in particular to a kind of rolling tire tyre surface sliding measuring system and tyre surface sliding
Measuring method.
Background technology
In actual use, tyre surface can face various types of inordinate wear problems, such as shoulder eccentric wear, bizet to tire
Center eccentric wear, with toe shape abrasion etc., the presence of these inordinate wears has had a strong impact on the service life of tire.Indoor tire is different
Normal wear testing analytical technology, is substantially shorter tire product construction cycle and improvement cycle.How by fast and effectively room
There is the type and the order of severity of inordinate wear in interior means of testing analysis prediction tire, be current country's foreign steamer in actual use
One of emphasis direction of tire enterprise wear test technological development.
The sliding of rolling tire tyre surface ground area is closely related with the abrasion of actual tire, and the distribution of tyre surface sliding field is special
Property be effectively used for analyze tire import particular market initial stage occur inordinate wear possibility.
The domestic and international existing tyre surface sliding e measurement technology scheme of tire enterprise, is essentially relying on the table top of tire running and fills
Pin type displacement transducer is put, pin type displacement transducer is contacted with the tyre surface specified measurement point of rolling tire, by pin type displacement
The multiple measurement of sensor, can obtain the tire slippage of tyre surface particular measurement position and its distribution under given operating mode.
The shortcoming of the existing tyre surface sliding e measurement technology based on pin type displacement transducer of domestic and international tire enterprise is mainly wrapped
Include following aspect：
Measuring principle existing defects.Because of the mounting characteristics of pin type displacement transducer, tire tread and pin type displacement transducer
Contact area there is space, the presence in the space causes the deformation and sliding of measured tire tread with tire in true road
Slip characteristic when being travelled on road has differences (tire changes with the contact condition on road surface)；
Measurement process is less efficient.Tire runs once, can complete the Microcell that tyre surface is contacted with needle sensor
The sliding measurement in domain, that is, can be only done a measurement for impact point.For the large range of ground area of tire tread, it is necessary to make
The relative position that tire operation is repeatedly and constantly change is contacted with needle sensor, can complete to slide the survey of field in ground area
Amount, time-consuming for whole test process, and efficiency is low；
The maintenance cost of needle sensor is high.Because tire is repeatedly in rolling contact needle sensor, sensor need to regularly school
Standard, with the stability for keeping sliding to measure.Needle sensor is frequently verified and safeguarded, its time cost and financial cost expend
It is larger.
The content of the invention
It is the defect for overcoming prior art to exist, the present invention is intended to provide a set of can measure what rolling tire tyre surface slid
Test system and method, for the sliding field measurement in tyre surface ground area during tire rolling, according to measured tire
Sliding field distribution situation under given operating mode, can be used to predict that tire imports the market initial stage and the type of abnormal wear and tight occurs
Weight degree.
To achieve the above object, present invention employs following technical scheme：
A kind of rolling tire tyre surface slides measuring system, including tire, and system also includes glass plate, and tire rolling passes through glass
Glass plate upper surface, the tyre surface of tire is coated with multiple tread labels points, and tire controls it to roll by tire rolling control unit,
Glass plate lower section is located in the vertical in tire and contact glass sheet region and is provided with for shooting tread labels point and glass
The high-speed CCD camera of " contact-leave " process atlas of plate, high-speed CCD camera transmits to processor atlas.
Further, glass plate lower section is additionally provided with two is used for what tire tread contact glass plate region was illuminated
LED light source.
Further, there is the rib and groove being intervally arranged, tread labels point is arranged on flower on the tyre surface of tire
On line bar, tread labels point is at least 5mm with rib edge spacing.
The measuring method of rolling tire tyre surface sliding measuring system is comprised the following steps：
(31) the multiple tread labels points of tire tread spraying；
(32) tire controls it to roll by tire rolling control unit；
(33) high-speed CCD camera was opened before tread labels point contact glass plate, high-speed CCD camera shoots tread labels
Put " contact-leave " the process atlas with glass plate and transmit to processor atlas；
(34) processor analyzes the barycenter for finding tread labels point in every image by the Blob in image processing algorithm
Coordinate；
(35) played in order atlas, finds out the correspondence image sequence number that tread labels point a starts to contact and leave in atlas,
For tread labels point a from i-th image, mark point a starts contact glass plate, and from jth image, mark point a starts
Glass plate is left, i-th coordinate of image tagged point a is (Xi, Yi), and the coordinate of jth image tagged point a is (Xj, Yj), mark
The sliding vector of note point a is made up of slippage and glide direction, and the slippage of mark point a is Δ X=Xj-Xi, Δ Y=Yj-Yi,
Δ X and Δ Y are to represent the slippage that mark point a is produced in abscissa X-direction and ordinate Y-direction respectively, with coordinate (Xi,
Yi it is glide direction towards the direction of coordinate (Xj, Yj)) as starting point；
(36) repeat step (35) can draw the sliding vector of all tread labels points.
Further, before step (33), LED light source is illuminated to the region of tire tread contact glass plate.
The invention has the advantages that：
The present invention can measure the sliding of tyre surface on the premise of the contact condition of tyre surface and contact surface is not changed；The present invention
The sliding field measurement that the measurement of tyre surface sliding, i.e. tire operation can be once completed under an operating mode can be efficiently completed, with
Selected measurement is counted out unrelated；Simple in measurement system structure of the invention, can be effectively reduced tyre surface sliding measurement
Maintenance cost.
Brief description of the drawings
Fig. 1 is the tyre surface sliding measuring system of rolling tire of the invention；
Fig. 2 is image centroid figure of the invention；
Fig. 3 is the sliding vector spirogram of tread labels point；
Fig. 4 is the schematic diagram of tread labels point 2；
Fig. 5 is marked with the schematic diagram of tread labels point for the tyre surface of the tire of strip decorative pattern；
Fig. 6 is the schematic diagram that strip decorative pattern is marked with tread labels point in an embodiment.
Specific embodiment
The present invention mainly exploitation set of system can measure the tyre surface sliding of rolling tire ground area.
Operation principle of the invention is as shown in Figure 1：Rolling tire tyre surface sliding measuring system includes tire 1 and glass plate 4,
Tire 1 rolls through the upper surface of glass plate 4, the tyre surface of tire 1 is coated with multiple tread labels points 2, rolls control unit 3 and sets
On tire 1, tire 1 controls it to roll by tire rolling control unit 3, and the lower section of glass plate 4 connects positioned at tire with glass plate
The height for shooting tread labels point 2 and " contact-leave " process atlas of glass plate 4 is provided with the vertical for touching region
Fast CCD camera 6, high-speed CCD camera 6 is maintained static, and its vertical distance away from glass plate 4 can be adjusted, to meet shooting
The size requirement in region, " contacting-leave " process to the tyre surface of rolling tire using high-speed CCD camera 6 carries out IMAQ, no
The contact condition of tyre surface and contact surface can be changed, high-speed CCD camera 6 transmits to processor 7 atlas.Relied on processor 7
Image processing software carries out Treatment Analysis to atlas, by the change of the position coordinates of tread labels point 2 in the image of continuous acquisition,
Calculate the slippage size and glide direction of tyre surface each mark point during tire rolling.LED light source 5 is used for tire
The illumination in tyre surface contact glass plate region.The operation of tire single can complete the sliding field measurement of whole tread labels point, test
Efficiency high." contact-leave " process atlas refers to high-speed CCD camera 6 and is coming into contact with glass in multiple tread labels points 2
Start shooting image during plate 4, terminate to shoot when multiple tread labels points 2 leave glass plate 4.
The lower section of glass plate 4 is additionally provided with two LED light sources for being illuminated to the region of 1 tyre surface contact glass plate of tire 4
5。
The measuring method of rolling tire tyre surface sliding measuring system is comprised the following steps：
(31) the multiple tread labels points 2 of the tyre surface of tire 1 spraying；
(32) tire 1 controls its to roll by tire rolling control unit 3, and tire 1 is from device one end rolls forward to another
End, glass plate 4 is located at the middle part of device；
(33) high-speed CCD camera 6 was opened before the contact glass plate of tread labels point 2, high-speed CCD camera 6 shoots tyre surface
" contact-leave " the process atlas of mark point 2 and glass plate 4 is simultaneously transmitted to processor 7 atlas；
(34) processor 7 analyzes the matter for finding tread labels point 2 in every image by the Blob in image processing algorithm
Heart coordinate；
(35) in the image of played in order collection, by " contacting-leaving " glass in all tread labels points of Visual Observations Observations
The whole process of glass plate 4 simultaneously finds out the correspondence image sequence number that each tread labels point starts to contact and leave, for tread labels point a
From i-th image, mark point a starts contact glass plate, and from jth image, mark point a initially moves off glass plate, i-th
The coordinate of image tagged point a is (Xi, Yi), and the coordinate of jth image tagged point a is (Xj, Yj), and the slippage of mark point a is
Δ X=Xj-Xi, Δ Y=Yj-Yi, Δ X and Δ Y are to represent that mark point a is produced in abscissa X-direction and ordinate Y-direction respectively
Raw slippage, is glide direction towards the direction of coordinate (Xj, Yj) with coordinate (Xi, Yi) as starting point, can similarly be drawn
The sliding vector of all tread labels points, the sliding that subsequently will have the different kinds of tyre than meaning is contrasted, and forms number
According to, the analysis and summary of image, chart, analysis judges the quality of product and the direction of product improvement.Before step (33), LED
Light source 5 is illuminated to the region of the tyre surface contact glass plate 4 of tire 1.
Blob analyses (Blob Analysis) is that the connected domain of same pixel in image is analyzed, and the connected domain claims
It is Blob.Blob analyses can provide quantity, position, shape and the direction of spot in image for machine vision applications, can be with
Topological structure between related spot is provided.
Tire 1 rolls through glass plate 4, and tread labels point 2 experienced " contact-leaving " process, because of rubber during being somebody's turn to do
Deformation and tyre surface and glass plate Microsliding, tread labels point 2 will produce certain slippage.Wherein, " contact-from
Open " process is that tread labels point 2 starts contact glass plate until the process left, high-speed CCD camera 6 shoots lower during this
Serial-gram.
Specifically the calculating process of slippage is：
(1) image containing tread labels point is processed, is analyzed by the Blob in image processing algorithm and found often
Open the center-of-mass coordinate of each mark point in image.
Assuming that 1 atlas is have taken in certain experiment high speed CCD camera, it is complete comprising rolling tire tyre surface in atlas
" contact-leaving " process, has n image, and Fig. 2 (a) is the 1st image, is analyzed by Blob and draws certain mark in this image
The coordinate of point is (X1, Y1), and Fig. 2 (b) is n-th image, and the coordinate of the mark point is (Xn, Yn), by that analogy.
The mark point of each position is not that, in synchronization and contact glass sheet, the moment for leaving glass plate also deposits on tyre surface
In difference, want accurately to calculate the slippage of each mark point of tyre surface, the time of contact of each mark point and glass plate need to be found out
And the departure time.
(2) image of played in order collection, trace is had when rubber is with contact glass sheet, and image depth can also produce change
Change, by vision it is observed that the whole process of tread labels point " contact-leaving " glass plate.Judge that each mark point is opened
Begin the moment for contacting and leaving, find out the correspondence image sequence number that each mark point starts to contact and leave.
Still in above figure as a example by mark point, from i-th image, mark point starts contact glass plate, from j image,
Mark point initially moves off glass plate, then during the mark point " contact-leaving ", coordinate is become by initial (Xi, Yi)
Final (Xj, Yj).
(3) referring to Fig. 3, the accurate slippage of the mark point is to represent for Δ X=Xj-Xi, Δ Y=Yj-Yi, Δ X and Δ Y
The slippage that tread labels point is produced in the x-direction and the z-direction respectively.
X-direction is abscissa, and Y-direction is ordinate, then the existing size of the slippage for obtaining, also have direction.With i-th figure
The mark point is starting point as in, makes the direction line with arrow, and the size of the length representative slippage of line segment, direction represents mark
The glide direction of point, the red arrow line in figure below is the sliding vector that the tread labels point is produced during tire rolling
Amount.
(4) sliding vector of all tread labels points is similarly obtained, you can obtain the tyre surface sliding field of rolling tire.
Test system " is contacted-left " process and be analyzed using camera and image processing techniques to tyre surface, draws tyre surface
The sliding size and glide direction of upper each mark point, the stability of a system are high, and maintenance cost is low.
Tread labels point is circular silvery white color dot, and under the irradiation of LED light, brightness is higher.Tread labels points takes a master
Will be according to following 2 aspects：Tyre tread type and specific pattern；Tire is in the potential inordinate wear form in target market.
By taking the tire of strip decorative pattern as an example, tyre tread part region is as shown in Figure 4：The decorative pattern form of strip decorative pattern is with length
Some shallow grooves, many, the rare deeper transverse patterns identical with tire running direction of groove are had based on bar, on rib
Ditch.Commercially potential inordinate wear form is mainly shoulder eccentric wear, bizet eccentric wear, wall scroll abrasion etc. to such tire.According to
Information above, taking for tread labels point a little investigates the difference that the upper each rib of tire transverse direction slides field by main, is predicted with this
Tire imports the possibility for the market initial stage inordinate wear occurring.
The tire specifically takes a little as shown in Figure 5：There is the rib and groove being intervally arranged, tire on the tyre surface of tire
Face mark point 2 is arranged on rib, and the distance of tread labels point and pattern edge near pattern edge need to be in certain limit
Interior, tread labels point 2 is at least 5mm with rib edge spacing.The Tire testing of strip decorative pattern only needs to laterally row's point
The eccentric wear possibility of tire can be analyzed, typically need not repeatedly be taken a little on longitudinal direction.Principle according to decile take a little, according to
Sliding field distribution by laterally upper tread labels point is that predictable strip rib tire imports the potential inordinate wear of market initial stage
Form and possibility.Test tire is not all wounded in the battle groove, and the tire of smooth surface can also enter the measurement of line slip, tyre surface mark
Note point is at least 5mm away from pattern edge spacing, no matter the pattern edge or the pattern edge of transverse direction of longitudinal direction.The horizontal stroke of tread labels point
Taken a little by equipartition principle to spacing, longitudinal pitch can also be pressed just in the tire of block-type tread on the basis of back gauge is controlled
The principle of decile takes a little.
In addition, the tire of block-type tread commercially potential inordinate wear form is mainly swing (Heel＆
Toe), tyre surface point is marked with the point sampling method of Fig. 6 on pattern block, you can reach the purpose of measurement analysis.Pair and other types
Decorative pattern, the point sampling method of strip decorative pattern and block-type tread can be combined, it is comprehensive to determine final tyre surface mark for the purpose of analysis
Note point.
Claims (5)
1. the measuring system that rolling tire tyre surface slides, it is characterised in that system includes glass plate（4）, tire rolling control unit
（3）, high-speed CCD camera（6）And processor（7）, tire（1）Roll through glass plate（4）Upper surface, tire（1）Tyre surface spray
Scribble multiple tread labels points（2）, tire（1）By tire rolling control unit（3）To control it to roll, glass plate（4）Lower section
It is provided for shooting multiple tread labels points（2）With glass plate（4）" contact-leave " process atlas high-speed CCD camera
（6）, high-speed CCD camera（6）Atlas is transmitted to processor（7）.
2. the measuring system that a kind of rolling tire tyre surface according to claim 1 slides, it is characterised in that glass plate（4）
Lower section is additionally provided with two for tire（1）Tyre surface contact glass plate（4）The LED light source that region is illuminated（5）.
3. the measuring system that a kind of rolling tire tyre surface according to claim 1 slides, it is characterised in that tire（1）'s
There is the rib and groove being intervally arranged, tread labels point on tyre surface（2）It is arranged on rib, tread labels point（2）
It is at least 5mm with rib edge spacing.
4. a kind of tyre surface of the measuring system described in use claim any one of 1-3 slides measuring method, it is characterised in that bag
Include following steps：
（31）Tire（1）The multiple tread labels points of tyre surface spraying（2）；
（32）Tire（1）By tire rolling control unit（3）It is controlled to roll；
（33）In multiple tread labels points（2）High-speed CCD camera is opened before contact glass plate（6）, high-speed CCD camera（6）Clap
Take the photograph tire multiple face mark point（2）With glass plate（4）" contact-leave " process atlas and atlas is transmitted to processor（7）；
（34）Processor（7）Analyzed by the Blob in image processing algorithm and find tread labels point in every image（2）Matter
Heart coordinate；
（35）Played in order atlas, finds out the correspondence image sequence number that tread labels point a starts to contact and leave in atlas, for
From i-th image, mark point a starts contact glass plate to tread labels point a, and from jth image, mark point a is initially moved off
Glass plate, the coordinate of i-th image tagged point a is（Xi,Yi）, the coordinate of jth image tagged point a is（Xj,Yj）, mark
The sliding vector of point a is made up of slippage and glide direction, and the slippage of mark point a is Δ X=Xj-Xi, Δ Y=Yj-Yi, Δ X
It is to represent the slippage that mark point a is produced in abscissa X-direction and ordinate Y-direction respectively with Δ Y, with coordinate（Xi,Yi）
As starting point, towards coordinate（Xj,Yj）Direction be glide direction；
（36）Repeat step（35）The sliding vector of all tread labels points can be drawn.
5. tyre surface according to claim 4 slides measuring method, it is characterised in that step（33）Before, LED light source（5）
To tire（1）Tyre surface contact glass plate（4）Region be illuminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611210587.4A CN106767434B (en) | 2016-12-24 | 2016-12-24 | Rolling tire tread slippage measurement system and tread slippage measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611210587.4A CN106767434B (en) | 2016-12-24 | 2016-12-24 | Rolling tire tread slippage measurement system and tread slippage measurement method |
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| CN106767434A true CN106767434A (en) | 2017-05-31 |
| CN106767434B CN106767434B (en) | 2023-03-28 |
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|---|---|---|---|
| CN201611210587.4A Active CN106767434B (en) | 2016-12-24 | 2016-12-24 | Rolling tire tread slippage measurement system and tread slippage measurement method |
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Cited By (3)
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| CN107490588A (en) * | 2017-08-24 | 2017-12-19 | 合肥美亚光电技术股份有限公司 | The method of tire defect location |
| CN108225798A (en) * | 2017-12-26 | 2018-06-29 | 东南大学 | Tyre skidding based on edge enhancing identification measures test system and test method |
| CN109447959A (en) * | 2018-10-17 | 2019-03-08 | 东南大学 | Tire static load mark measurement method |
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| CN109447959A (en) * | 2018-10-17 | 2019-03-08 | 东南大学 | Tire static load mark measurement method |
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| CN106767434B (en) | 2023-03-28 |
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