CN109655287A - Tire grounding state evaluation method - Google Patents
Tire grounding state evaluation method Download PDFInfo
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- CN109655287A CN109655287A CN201811035726.3A CN201811035726A CN109655287A CN 109655287 A CN109655287 A CN 109655287A CN 201811035726 A CN201811035726 A CN 201811035726A CN 109655287 A CN109655287 A CN 109655287A
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- film thickness
- evaluation method
- grounding state
- state evaluation
- tire grounding
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- 238000011156 evaluation Methods 0.000 title claims abstract description 33
- 229920001971 elastomer Polymers 0.000 claims abstract description 61
- 238000002474 experimental method Methods 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000009826 distribution Methods 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000001228 spectrum Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 18
- 239000000049 pigment Substances 0.000 claims description 16
- 238000002189 fluorescence spectrum Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 14
- ZJTZPTQLWKAWIX-UHFFFAOYSA-N [Na].[Na].[Na].OS(=O)(=O)C1=C(S(O)(=O)=O)C(S(O)(=O)=O)=C2C(O)=CC3=CC=CC4=CC=C1C2=C34 Chemical group [Na].[Na].[Na].OS(=O)(=O)C1=C(S(O)(=O)=O)C(S(O)(=O)=O)=C2C(O)=CC3=CC=CC4=CC=C1C2=C34 ZJTZPTQLWKAWIX-UHFFFAOYSA-N 0.000 claims description 12
- 230000010148 water-pollination Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 16
- 230000005283 ground state Effects 0.000 description 15
- KPHWPUGNDIVLNH-UHFFFAOYSA-M diclofenac sodium Chemical compound [Na+].[O-]C(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl KPHWPUGNDIVLNH-UHFFFAOYSA-M 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- ZTVJNGZYOFVVFX-UHFFFAOYSA-N [Na].[Na].[Na].C=1(C(=C(C2=CC=C3C=CC=C4C=CC1C2=C34)S(=O)(=O)O)S(=O)(=O)O)S(=O)(=O)O Chemical compound [Na].[Na].[Na].C=1(C(=C(C2=CC=C3C=CC=C4C=CC1C2=C34)S(=O)(=O)O)S(=O)(=O)O)S(=O)(=O)O ZTVJNGZYOFVVFX-UHFFFAOYSA-N 0.000 description 2
- 238000011088 calibration curve Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002795 fluorescence method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- BIJNHUAPTJVVNQ-UHFFFAOYSA-N 1-Hydroxypyrene Chemical compound C1=C2C(O)=CC=C(C=C3)C2=C2C3=CC=CC2=C1 BIJNHUAPTJVVNQ-UHFFFAOYSA-N 0.000 description 1
- MTYHUTYJKFVTJJ-UHFFFAOYSA-N 4-hydroxypyrene-1,2,3-trisulfonic acid Chemical compound OS(=O)(=O)C1=C(S(O)(=O)=O)C(S(O)(=O)=O)=C2C(O)=CC3=CC=CC4=CC=C1C2=C34 MTYHUTYJKFVTJJ-UHFFFAOYSA-N 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000001917 fluorescence detection Methods 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/027—Tyres using light, e.g. infrared, ultraviolet or holographic techniques
Abstract
The present invention provides the correlativity between a kind of tyre contact area and coefficient of friction according in wet road when driving and the tire grounding state evaluation method accurately evaluated tire grounding state.With following process: pressing in the setting of a face of transparent panel across fluorescent liquid by rubber experiment piece and there is ground plane with the comparable bumps in practical road surface, load when keeping straight on mobile while sliding to the rubber experiment piece measures, and is measured to the coefficient of friction between ground plane and rubber experiment piece；From the side opposite with ground plane of transparent panel, excitation light is irradiated to the fluorescent liquid between ground plane and rubber experiment piece, and be measured to the Luminance Distribution of the fluorescence released from fluorescent liquid；On the basis of obtained Luminance Distribution, using arbitrary brightness as threshold value, 2 value images are obtained to find out contact area；The increase and decrease of contact area is found out according to the difference of the different 2 value image of more than two kinds of location parameter.
Description
Technical field
The present invention relates to according to the correlativity between the tyre contact area and coefficient of friction in wet road when driving
And to the method that tire grounding state is evaluated.
Background technique
In the past, the method evaluated as the ground state to tire, uses: connecing tire on plate
Ground, and to the method that ground connection shape at that time is visually observed, it is known that having optical interferometry, total reflection method
Equal method for visualizing.
However, tire characteristics when by tire pressing on plate are to be detached from the tire characteristics on practical road surface,
Therefore, seek one kind can be in the side that the male and fomale(M&F) with practical road surface quite (following or practical road phase is face to face) is evaluated
Method.In order to realize the purpose, for example, in patent document 1, proposing that there are as below methods: being provided with tire and reality on surface
The ground plane of the comparable bumps in border road surface is grounded, and is shot to the ground connection shape of tire, it is also proposed that there are as below methods:
In order to improve the consistency with actual vehicle evaluation, then the space segment filled coloring liquid on ground plane carries out tire
Ground connection, and shot.
In the method documented by the patent document 1, although can be realized the evaluation of the ground state in wet road,
In terms of using the method for pigmented fluids, it will be difficult to realize the measurement accuracy that should ensure that in principle, so that scalability side
There are problems in face.
In particular, the bumps of size of different sizes mix on real road, utilization (strain) MITUTOYO's
Come when being measured to the surface roughness on real road aggregate surface, arithmetic average roughness (Ra) is the coarse meter of contact
20 μm or so.It is envisioned: under dynamic sliding state, to will receive and formed on the aggregate surface with above-mentioned surface roughness
Relatively thin moisture film influence, this requires the sides that the measurement accuracy that can also be detected to the thinner part of film thickness is excellent
Method.
Therefore, as to have and the tire in the wet road of the comparable male and fomale(M&F) in practical road surface ground state carry out
The method of evaluation proposes in non-patent literature 1: using the method for light stimulus fluorescence method.According to light stimulus fluorescence method,
In the case that the film thickness of fluorescent liquid between rubber experiment piece and ground plane is relatively thin, brightness is directly proportional to the film thickness of fluorescent liquid, because
This, measurement accuracy can be excellent, has further acknowledged 10 μm of film thickness measurement examples below.
However, even if commenting the ground state of the tire with the stationary state on the comparable male and fomale(M&F) in practical road surface
Valence, there is also have: not obtaining asking for the consistency between the evaluation of the ground state of the tire when driving on practical road surface
Topic.
Patent document 1: Japanese Unexamined Patent Publication 2003-240681 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2012-154858 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2004-9880 bulletin
Patent document 4: Japanese Unexamined Patent Publication 2016-8950 bulletin
Patent document 5: Japanese Unexamined Patent Publication 2017-58244 bulletin
Non-patent literature 1: the positive Fu Shi in Jiangkou writes " photo-induction Fluorescent light method The い go system plate-male and fomale(M&F) mediate contact
Portion parse-visualize と luminance ヒ ス ト グ ラ system parsing-", Nobuyshi OHNO, Tribologist volume 58 the 10th
Numbers page (2013) 763~772
Summary of the invention
Evaluation method when about tire running, Patent Document 2 discloses following methods, that is, make tire with will be by
The transparent panel that the liquid level that white liquid is constituted is set to surface is grounded, and moves tire relatively in the longitudinal direction
It is dynamic that the ground connection shape of tire is shot on one side, still, identically as above patent document 1, use pigmented fluids
The precision of measurement method, evaluation is not enough.In addition, being mainly focused on to obtain the dynamic ground plane on smooth glass plate
The profile of shape, imagination, which does not go out, evaluates the random ground state for bumps occur with practical road surface.
Even in addition, can obtain be in wet road identical contact area tire, to facilitating adherence properties
The coefficient of friction of energy etc. is not also identical, inventor appreciates that needing to know the feature of ground state rather than just simple
The size relation of contact area.Also, it was found that by according to the correlativity between tyre contact area and coefficient of friction come pair
The influence of other parameters bring is evaluated, it will be able to be evaluated with superior precision tire grounding state.For example, root
Select according to the difference of experiment parameter contact area is identical but coefficient of friction there are the states of size relation, and the two is carried out
Compare, thus, it is possible to the features of the high ground state of clear coefficient of friction.However, it is predicted that the difference of the two is small, needs essence
Spend high measuring method.
The present invention is exactly in view of above-mentioned aspect, and it is an object of the present invention to provide a kind of tire interface according in wet road when driving
Correlativity between area and coefficient of friction and the method to be evaluated tire grounding state with high precision.
In addition, being described in patent document 3: the dress that the ground connection shape of tread when to tire running is measured
It sets, patent document 4 describes: the watcher that the deformation for the rubber elastomeric material for being applied with drift angle can be observed
Method.
In addition, describing a kind of rubber friction test method in patent document 5, that is, press the flat surface of rubber experiment piece
It is pressed on: including aggregate inside and simulate Surface of Trial Pavement made of practical road surface, make rubber experiment in flat Surface of Trial Pavement
Load when piece keeps straight on mobile while sliding measures, and to the coefficient of friction between Surface of Trial Pavement and rubber experiment piece
It is measured.
However, above-mentioned evaluated the characteristic of the tire in wet road, so can not be direct by the above method
Applied to the evaluation in wet road.In addition, patent document 5 is measured to coefficient of friction, there is no open to wet
The content that the correlativity between tyre contact area and coefficient of friction on road surface when driving is evaluated.
Tire grounding state evaluation method according to the present invention has following process: by rubber experiment piece across fluorescent liquid
And press on being arranged on a face of transparent panel and there is ground plane with comparable bumps in practical road surface, to rubber examination
It tests load when piece keeps straight on mobile while sliding to measure, and to the coefficient of friction between ground plane and rubber experiment piece
It is measured；From the side opposite with ground plane of transparent panel, the fluorescent liquid between ground plane and rubber experiment piece is shone
Excitation light is penetrated, and the Luminance Distribution of the fluorescence released from fluorescent liquid is measured；On the basis of obtained Luminance Distribution,
Using arbitrary brightness as threshold value, 2 value images are obtained to find out contact area；According to location parameter it is different of more than two kinds 2
The difference of value image, to find out the increase and decrease of contact area.
Above-mentioned different location parameter can be from by measuring moment, the movement speed of rubber experiment piece, rubber experiment piece
Hardness, by what is selected in group that rubber experiment piece is constituted to the shape for the pressure and rubber experiment piece that ground plane presses
It is at least one kind of.
Preferably, above-mentioned fluorescent liquid can contain: the difference of the peak wavelength between exiting spectrum and fluorescence spectrum is 100nm
Above hydrophilic fluorescent pigment, above-mentioned hydrophilic fluorescent pigment are hydroxyl pyrene trisulfonic acid trisodium.
The pH of above-mentioned fluorescent liquid can be 5~8.
It can also include and obtained Luminance Distribution is transformed to the film thickness distribution of fluorescent liquid to obtain film thickness distribution figure
The process of picture, the process that the increase and decrease of film thickness is found out according to the difference of the different film thickness distribution image of more than two kinds of location parameter.
The effect of invention
Evaluation method according to the present invention, can be according to the tyre contact area and coefficient of friction in wet road when driving
Between correlativity and tire grounding state evaluated with high precision.
Detailed description of the invention
Fig. 1 is the whole knot for indicating to carry out the testing machine of tire grounding state evaluation method involved in an embodiment
The schematic drawing of structure.
Fig. 2 is the fluorescence determination device for indicating to carry out tire grounding state evaluation method involved in an embodiment
The schematic drawing of structure.
Fig. 3 be indicate by hydroxyl pyrene trisulfonic acid trisodium be used as fluorchrome in the case where exiting spectrum and fluorescence spectrum it
Between relationship schematic drawing.
Description of symbols
1... transparent panel；2... rubber experiment piece；3... bracket；4... load device；5... driving device；6... load
Sensor；7... control device；8... workbench；9... actuator；10.. testing machine；11.. fluorescent liquid；12.. light source；13..
Shooting unit；14.. dichronic mirror；15.. reflecting mirror；16.. optical filter；17.. optical filter；18.. transparent panel setting table；20.. glimmering
Light measurement device.
Specific embodiment
In the following, be based on Fig. 1 to 3, to the tire grounding state evaluation method of an embodiment according to the present invention into
Row explanation.
The tire grounding state evaluation method of present embodiment has following steps, it may be assumed that by rubber experiment piece across fluorescence
Liquid and press on being arranged on a face of transparent panel and there is ground plane with the comparable bumps in practical road surface, to making the rubber
Load when glue test film keeps straight on mobile while sliding measures, and to the friction between ground plane and rubber experiment piece
The step of coefficient is measured；From the opposite side with ground plane of transparent panel, between ground plane and rubber experiment piece
Fluorescent liquid irradiates excitation light, and the step of being measured to the Luminance Distribution of the fluorescence released from fluorescent liquid；With obtained
On the basis of Luminance Distribution, using arbitrary brightness as threshold value, 2 value images are obtained come the step of finding out contact area；According to survey
The difference of the different 2 value image of more than two kinds of parameter is determined, the step of increase and decrease to find out contact area.
Fig. 1 is the integrally-built simple of the testing machine for the tire grounding state evaluation method for indicating progress present embodiment
Figure.
Testing machine 10 has: transparent panel 1, has ground plane in a face, and the ground plane has and practical road surface phase
When the bumps of (or practical road phase is face to face)；Bracket 3 keeps rubber experiment piece 2；Load device 4, rubber is tried
It tests piece 2 and presses on transparent panel 1；Driving device 5 is used to that rubber experiment piece 2 to be made to make a relative move relative to transparent panel 1；It carries
Lotus sensor 6 measures the load for acting on rubber experiment piece 2；And control device 7, to dynamic needed for test
It is controlled.In addition, transparent panel 1 is set on transparent panel setting table 18, has fluorescence under transparent panel setting table 18
Measurement device 20.
It is not limited especially about the production method for having the transparent panel 1 for being provided with the concave-convex ground plane of practical road mutually face to face
It is fixed, such as can be made by following manner, that is, from pitch corresponding with practical road surface, using silicon rubber to true
Empty casting is carried out die-filling with silicon mould, so that transparent resin is flowed into the mold, and be allowed to harden in vacuum outgas state.As saturating
Ming tree rouge, for example, polyurethane based resin.
Rubber experiment piece 2 can be made by vulcanized rubber, comprising: the flat surface being pressed against on transparent panel 1 can also have
Have: with the comparable groove of tire ditch, cone cell.
Bracket 3 is connect with load device 4.Load device 4 is constituted are as follows: enables bracket 3 along the Z vertical with transparent panel 1
Direction (up and down direction of Fig. 1) moves back and forth.By suitably setting the position of the bracket 3 (between bracket 3 and transparent panel 1
Every), the load for capableing of the Z-direction of opposite 2 input of rubber experiment piece is adjusted, thus, it is possible under defined pressure condition
Rubber experiment piece 2 is pressed on transparent panel 1.Load device 4 is made of servo motor, but also can use other actuator machines
Structure.
Driving device 5 is constituted are as follows: enables the workbench 8 supported to the load device 4 (left and right of Fig. 1 along the X direction
Direction) it moves back and forth.Make bracket 3 mobile by the movement of the workbench 8,2 one side of rubber experiment piece can be made to exist
It slides on transparent panel 1 and moves on one side.Actuator 9 is constituted are as follows: enables workbench 8 along vertical with X-direction and Z-direction both sides
Y-direction (direction perpendicular to paper of Fig. 1) moves back and forth, and the rubber experiment piece 2 that is used in Y-direction and transparent
The contraposition of plate 1.In the present embodiment, driving device 5 and actuator 9 are made of servo motor respectively, and but not limited to this.
The load that load transducer 6 can amount to three components to two components of vertical component and level measures,
It being capable of load (vertical force), the load of X-direction (front and back power) and Y-direction to the Z-direction acted on rubber experiment piece 2
Load (cross force) measure.Load transducer 6 is for example made of load cell.In the present embodiment, in bracket 3
Upside (opposite side of rubber experiment piece 2) is equipped with load transducer 6.
Control device 7 has: operational part 7a, calculating needed for carrying out the measurement of coefficient of friction；Operation control part 7b,
The movement of load device 4, driving device 5 etc. is controlled；Input unit 7c receives the input from testing operation person；With
And display unit 7d, various information relevant to the operation of testing machine 10, setting etc. are shown on picture.By load transducer
6 obtained measured values are fed to control device 7, and operational part 7a is based on the measured value and calculates coefficient of friction.
In addition, as shown in Fig. 2, being configured in the lower part of transparent panel setting table 18 if lower component is as fluorescence determination device
20, it may be assumed that light source 12；Optical filter 16 only makes the light of specific wavelength penetrate and be separated from from the light that light source 12 irradiates；
Dichronic mirror 14 only reflects the light of specific wavelength；Reflecting mirror 15 carries out the fluorescence released from fluorescent liquid 11 anti-
It penetrates；Optical filter 17 only makes the light of specific wavelength penetrate and be separated from the fluorescence released；And shooting unit
13, the fluorescence penetrated from optical filter 17 is measured.
Fluorescence determination device 20 can be fixed in the lower part of transparent panel setting table 18, also may be constructed are as follows: be supported in
Workbench 8, and can be moved back and forth along the X direction in linkage using driving device 5 with load device 4.
About the tire grounding state evaluation method of present embodiment, for example, can be by hydroxyl pyrene trisulfonic acid trisodium (ピ ラ
ニ Application) it is used as hydrophilic fluorescent pigment, and implement using above-mentioned testing machine 10 and in the following manner.That is, making containing hydroxyl
The fluorescent liquid 11 of pyrene trisulfonic acid trisodium is between the transparent panel 1 having with the comparable bumps in practical road surface, then to rubber experiment piece 2
Flat surface pressed, and to make load of the rubber experiment piece 2 when keeping straight on mobile on the transparent panel 1 while sliding into
Row measurement, and the coefficient of friction between transparent panel 1 and rubber experiment piece 2 is measured.It to coefficient of friction of rest and can move
Any one of state coefficient of friction is measured.Press on the pressure condition and speed, path of the rubber experiment piece 2 of transparent panel 1
Deng straight trip it is mobile involved in condition be to be controlled by control device 7.Movement speed can be set as: so that rubber
Test film 2 slides at a same speed in defined section.
At this point, ultraviolet light LED (peak wavelength 365nm) is used as light source 12 to irradiate excitation light, optical filter 16 is utilized
(400nm low pass filter) is that 400nm excitation light below separates to wavelength.Make separated excitation light out in color separation
Mirror 14 reflects, and from the side opposite with ground plane of transparent panel 1 towards between rubber experiment piece 2 and ground plane
Fluorescent liquid 11 irradiates excitation light, swashs the hydroxyl pyrene trisulfonic acid trisodium contained by fluorescent liquid 11 from ground state transition
Encourage state.Later, it motivates the hydroxyl pyrene trisulfonic acid trisodium of state to return again to ground state, releases fluorescence at this time.It is discharged
Fluorescence out is reflected after penetrating from dichronic mirror 14 by reflecting mirror 15, and utilizes optical filter 17 (480nm bypasses optical filter)
And the fluorescence that wavelength is 480nm or more is separated.Separated fluorescence out is shot using shooting unit 13, thus
It can obtain Luminance Distribution (fluorescence intensity image).
The tire grounding state evaluation method of present embodiment also has following process, it may be assumed that is obtained in the above described manner is bright
On the basis of degree distribution, 2 values are carried out using any brightness as threshold value.Specifically, by by some specific brightness settings
It can be the region that threshold value region below is contacted as rubber experiment piece 2 and ground plane using brightness for threshold value, thus
To 2 value images.According to such 2 value image, for example, can be in contact to actually rubber experiment piece 2 and ground plane
Area is calculated.
By carrying out above-mentioned test, can obtain simultaneously: coefficient of friction and expression wet road and rubber in wet road
2 value images of the ground state between glue test film 2, so as to find out their correlativity.
The tire grounding state evaluation method of present embodiment is also to include on the basis of above-mentioned operation according to measurement
The difference of the different 2 value image of more than two kinds of parameter and the process of the increase and decrease that finds out contact area.According to the difference of 2 value images
And the increase and decrease of contact area is found out, thus, it is possible to be evaluated to the influence of ground state bring location parameter.For example, depositing
In the case where having that contact area is identical but 2 value image that coefficient of friction is different, can be defined according to the comparison of the two
The feature of the high ground state of coefficient of friction.In addition, 2 value image of more than two kinds is handled with identical threshold value.
As location parameter, for example, can enumerate: the measurement moment, the movement speed of rubber experiment piece 2, rubber experiment piece 2
Hardness, the pressure from rubber experiment piece 2 to ground plane, the shape of rubber experiment piece 2 that press etc..That is, not about location parameter
Same 2 value image of more than two kinds can be the 2 value images different to the measurement moment obtained in primary test each other
Compare, be also possible to change following location parameter and the different tests that carry out obtained in 2 value images that
This is compared, i.e., the described location parameter refers to the movement speed of rubber experiment piece 2, the hardness of rubber experiment piece 2, tries rubber
Test the parameters such as pressure, the shape of rubber experiment piece 2 that piece 2 is pressed to ground plane.
In the above-described embodiment, to using hydroxyl pyrene trisulfonic acid trisodium to carry out as the case where hydrophilic fluorescent pigment
Illustrate, but the present invention is not limited to this.About fluorescent liquid 11, various hydrophilic fluorescent pigments are able to use, but excellent from obtaining
From the perspective of different measurement accuracy, preferably, the difference of the peak wavelength containing exiting spectrum and fluorescence spectrum is 100nm or more
Hydrophilic fluorescent pigment aqueous solution.The parent for being 100nm or more as the difference of exiting spectrum and the peak wavelength of fluorescence spectrum
The concrete example of aqueous fluorescent pigment can be enumerated: hydroxyl pyrene trisulfonic acid trisodium, Dyomics society DY-481XL-
Carboxylic Acid, DY-521XL-Carboxylic Acid, ATTO 490LS carboxy of ATTO-TEC society etc.,
It is preferable to use hydroxyl pyrene trisulfonic acid trisodiums from the viewpoint of safety, cost.In addition, in exiting spectrum and/or fluorescence
The peak wavelength of spectrum, can also about exiting spectrum and/or fluorescence spectrum there are in the case where multiple hydrophilic fluorescent pigments
With by using optical filter etc., so that the difference of the peak wavelength between exiting spectrum and fluorescence spectrum is 100nm with Shangdi, and
It selects and uses peak wavelength.
Hydroxyl pyrene trisulfonic acid trisodium is hydrophilic pH sensitive optical pigment, and fluidity is if neutral~acid, excitation light
The peak wavelength of spectrum is revealed in 365nm nearby and near 400nm, and fluidity is revealed in if alkalinity, the peak wavelength of exiting spectrum
Near 450nm.In addition, the peak wavelength of fluorescence spectrum is unrelated with fluidity and mainly near 510nm, be almost not detected
400nm fluorescence spectrum below.Therefore, using hydroxyl pyrene trisulfonic acid trisodium as hydrophilic fluorescent pigment,
From the viewpoint of the difference 100nm or more for making the peak wavelength between exiting spectrum and fluorescence spectrum, the fluidity of fluorescent liquid 11
Preferably neutral~acid, pH is preferably 5~8.In addition, in the present embodiment, for excitation light, use is only capable of penetrating
The optical filter 16 of 400nm wavelength below, thus the peak wavelength of the exiting spectrum of hydroxyl pyrene trisulfonic acid trisodium be mainly
The difference of 365nm, the peak wavelength between exiting spectrum and fluorescence spectrum are up to 145nm.
As fluorescent liquid 11, as shown in figure 3, being by using the difference of the peak wavelength between exiting spectrum and fluorescence spectrum
The fluorchrome of 100nm or more, and hardly have the repetition of wavelength region between exiting spectrum and fluorescence spectrum, from
And exiting spectrum and fluorescence spectrum can be sufficiently separated open, therefore, it is easy to get excellent measurement accuracy.
Although concentration about the hydrophilic fluorescent pigment in fluorescent liquid is not particularly limited, still, using hydroxyl pyrene
In the case where trisulfonic acid trisodium, preferably 100~10000mg/L.
Above-mentioned light source 12 can correspond to the exiting spectrum of used hydrophilic fluorescent pigment, and carry out appropriate selection simultaneously
It uses, though it is not particularly limited, however, it is preferred to are as follows: in the peak value of the exiting spectrum of used hydrophilic fluorescent pigment
Wavelength nearby has the light source 12 of peak wavelength, more preferably single wavelength.It is hydroxyl in used hydrophilic fluorescent pigment
In the case where pyrene trisulfonic acid trisodium, the peak wavelength of the light irradiated is preferably 350~400nm.
It is not particularly limited about dichronic mirror 14, optical filter 16,17, can correspond to used hydrophilic fluorescent color
The exiting spectrum and fluorescence spectrum of element, and suitably selected and used.As optical filter 16,17, for example, can enumerate:
Carry out the fluorescent optical filter for the wavelength selective for noise being removed when fluorescence detection, by the short wavelength side also shorter than provision wavelengths
Light ended (cut) and penetrate the light of long wavelength side bypass optical filter (long pass filter), will be also longer than provision wavelengths
Long wavelength side light ended (cut) and penetrate the light of short wavelength side low pass filter (short pass filter), only allow
The light of constant wavelength region penetrates and is ended the band of (cut) to the light of short wavelength side and long wavelength side in addition to this
Pass filter etc..
The tire grounding state evaluation method of present embodiment can also include obtained Luminance Distribution is transformed to it is glimmering
The film thickness distribution of light liquid 11 and obtain film thickness distribution image process and the of more than two kinds film thickness different according to location parameter
The difference of distributed image is come the process that finds out the increase and decrease of film thickness.The rubber high for drainage, it is believed that: it is present in rubber-road
The film thickness of fluorescent liquid 11 between the bumps of face can be thinning, so can predict: facilitate the increase of coefficient of friction.Therefore, pass through
The of more than two kinds film thickness distribution images different to location parameter compare, and can find out rubber-road surface under friction condition
The increase and decrease of the film thickness of existing fluorescent liquid 11 between bumps, thus, it is possible to evaluate the contribution of drainage, film thickness to coefficient of friction, from
And ground state can be evaluated in more detail.The relatively thin feelings of the film thickness of fluorescent liquid 11 between rubber experiment piece 2 and ground plane
Under condition, since brightness is directly proportional to film thickness,, can will be obtained by the way that the brightness after numeralization is scaled film thickness
Luminance Distribution is transformed to film thickness distribution.In addition, the front travel as the process, can also carry out brightness and the correction of film thickness.
For example, fluorescent liquid 11 is filled into: glass plate known to size is combined and the space that is formed, obtain as a result, film thickness and
The calibration curve of brightness, and the calibration curve is applied, thereby, it is possible to brightness is scaled film thickness.Accordingly, even if in brightness and film
Thickness can also be applied there is no in the case where proportionate relationship.
Although embodiments of the present invention are illustrated, above embodiment is intended only as example and shows
, it is not intended to be defined the range of invention.Above-mentioned new embodiment can be implemented with other various ways, not take off
In the range of the purport of invention, it is able to carry out various omissions, displacement, change.These embodiments, its deformation are contained in invention
Range, purport, and be contained in documented by claims invention and its equivalency range in.
Industrial applicibility
Tire grounding state evaluation method of the invention can be used for the various of passenger car, light truck, bus etc.
The evaluation of the ground state of tire.
Claims (10)
1. a kind of tire grounding state evaluation method, which is characterized in that
Comprising:
Rubber experiment piece is pressed on being arranged on a face of transparent panel across fluorescent liquid and is had and practical road surface phase
When concave-convex ground plane, load keep straight on when moving while sliding to the rubber experiment piece measures, and to ground connection
The process that coefficient of friction between face and rubber experiment piece is measured；
From the side opposite with ground plane of transparent panel, excitation is irradiated to the fluorescent liquid between ground plane and rubber experiment piece
Light, and to the process that the Luminance Distribution of the fluorescence released from fluorescent liquid is measured；
On the basis of obtained Luminance Distribution, using arbitrary brightness as threshold value, 2 value images are obtained, to find out contact surface
Long-pending process；
According to the difference of the different 2 value image of more than two kinds of location parameter, come find out contact area increase and decrease process.
2. tire grounding state evaluation method according to claim 1, which is characterized in that
The location parameter be from by the measurement moment, the movement speed of rubber experiment piece, the hardness of rubber experiment piece, rubber tried
Test in the group that piece is constituted to the shape for the pressure and rubber experiment piece that ground plane presses select it is at least one kind of.
3. tire grounding state evaluation method according to claim 1 or 2, which is characterized in that
The fluorescent liquid contains: the difference of the peak wavelength between exiting spectrum and fluorescence spectrum is that the hydrophily of 100nm or more is glimmering
Photopigment.
4. tire grounding state evaluation method according to claim 1 or 2, which is characterized in that
The hydrophilic fluorescent pigment is hydroxyl pyrene trisulfonic acid trisodium.
5. tire grounding state evaluation method according to claim 3, which is characterized in that
The hydrophilic fluorescent pigment is hydroxyl pyrene trisulfonic acid trisodium.
6. tire grounding state evaluation method according to claim 4, which is characterized in that
The pH of the fluorescent liquid is 5~8.
7. tire grounding state evaluation method according to claim 5, which is characterized in that
The pH of the fluorescent liquid is 5~8.
8. tire grounding state evaluation method according to claim 1 or 2, which is characterized in that
Also include
Obtained Luminance Distribution is transformed to process of the film thickness distribution of fluorescent liquid to obtain film thickness distribution image；
The process for finding out the increase and decrease of film thickness according to the difference of the different film thickness distribution image of more than two kinds of location parameter.
9. tire grounding state evaluation method according to claim 3, which is characterized in that
Also include
Obtained Luminance Distribution is transformed to process of the film thickness distribution of fluorescent liquid to obtain film thickness distribution image；
The process for finding out the increase and decrease of film thickness according to the difference of the different film thickness distribution image of more than two kinds of location parameter.
10. tire grounding state evaluation method according to claim 4, which is characterized in that
Also include
Obtained Luminance Distribution is transformed to process of the film thickness distribution of fluorescent liquid to obtain film thickness distribution image；
The process for finding out the increase and decrease of film thickness according to the difference of the different film thickness distribution image of more than two kinds of location parameter.
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| JP2017-198661 | 2017-10-12 | ||
| JP2017198661A JP7017899B2 (en) | 2017-10-12 | 2017-10-12 | Tire ground contact condition evaluation method |
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| CN109655287A true CN109655287A (en) | 2019-04-19 |
| CN109655287B CN109655287B (en) | 2020-12-08 |
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| CN115015103B (en) * | 2022-05-24 | 2023-01-03 | 武汉中誉鼎力智能科技有限公司 | Real-time detection method and device for friction factor and microscopic morphology of material surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003240681A (en) * | 2002-02-20 | 2003-08-27 | Bridgestone Corp | Tire grounding characteristic evaluating method |
| WO2009116359A1 (en) * | 2008-03-17 | 2009-09-24 | 国立大学法人東京農工大学 | Contact area measurement device and method for measuring contact area |
| CN101668672A (en) * | 2007-04-27 | 2010-03-10 | 株式会社普利司通 | Tire grounding state estimating method, tire grounding state estimating device, and grounding state estimating tire |
| JP2012154858A (en) * | 2011-01-27 | 2012-08-16 | Bridgestone Corp | Method and apparatus for measuring shape of tire |
| CN104471367A (en) * | 2012-07-20 | 2015-03-25 | 株式会社普利司通 | Tire contact properties measurement method and measurement device |
| CN105209879A (en) * | 2013-04-17 | 2015-12-30 | 天一系统 | Module for testing active contact pressure of tire, and tire testing apparatus using same |
| CN106525137A (en) * | 2016-12-07 | 2017-03-22 | 天津大学 | Liquid film temperature field and flow field simultaneous measurement method based on laser induced fluorescence |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009085621A (en) * | 2007-09-27 | 2009-04-23 | Sumitomo Rubber Ind Ltd | Measuring tool of tire grounding part |
| JP6594715B2 (en) * | 2015-09-16 | 2019-10-23 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Rubber friction test method |
-
2017
- 2017-10-12 JP JP2017198661A patent/JP7017899B2/en active Active
-
2018
- 2018-09-06 CN CN201811035726.3A patent/CN109655287B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003240681A (en) * | 2002-02-20 | 2003-08-27 | Bridgestone Corp | Tire grounding characteristic evaluating method |
| CN101668672A (en) * | 2007-04-27 | 2010-03-10 | 株式会社普利司通 | Tire grounding state estimating method, tire grounding state estimating device, and grounding state estimating tire |
| WO2009116359A1 (en) * | 2008-03-17 | 2009-09-24 | 国立大学法人東京農工大学 | Contact area measurement device and method for measuring contact area |
| JP2012154858A (en) * | 2011-01-27 | 2012-08-16 | Bridgestone Corp | Method and apparatus for measuring shape of tire |
| CN104471367A (en) * | 2012-07-20 | 2015-03-25 | 株式会社普利司通 | Tire contact properties measurement method and measurement device |
| CN105209879A (en) * | 2013-04-17 | 2015-12-30 | 天一系统 | Module for testing active contact pressure of tire, and tire testing apparatus using same |
| CN106525137A (en) * | 2016-12-07 | 2017-03-22 | 天津大学 | Liquid film temperature field and flow field simultaneous measurement method based on laser induced fluorescence |
Non-Patent Citations (2)
| Title |
|---|
| MASAO EGUCHI: "Measurement ofrealcontactareaandanalysisofstick/slipregion", 《TRIBOLOGYINTERNATIONAL》 * |
| 王国林: "子午线轮胎静态及滚动状态下接地特性试验研究", 《橡胶工业》 * |
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| Publication number | Publication date |
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| JP2019074335A (en) | 2019-05-16 |
| CN109655287B (en) | 2020-12-08 |
| JP7017899B2 (en) | 2022-02-09 |
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