EP3899484A1 - Procédé et système d'évaluation de paramètres d'un pneumatique - Google Patents
Procédé et système d'évaluation de paramètres d'un pneumatiqueInfo
- Publication number
- EP3899484A1 EP3899484A1 EP19845610.5A EP19845610A EP3899484A1 EP 3899484 A1 EP3899484 A1 EP 3899484A1 EP 19845610 A EP19845610 A EP 19845610A EP 3899484 A1 EP3899484 A1 EP 3899484A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tire
- vehicle
- data
- sensor
- housing
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 12
- 238000011156 evaluation Methods 0.000 claims description 5
- 230000002123 temporal effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000005355 Hall effect Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
- G01L17/005—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies using a sensor contacting the exterior surface, e.g. for measuring deformation
-
- 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
Definitions
- the present invention relates to a system for evaluating the condition of a tire, and more particularly the evaluation of parameters such as wear, deflection, or even the pressure and load of a tire.
- the tread of a pneumatic tire is provided with a sculpture comprising in particular sculpture elements or elementary blocks delimited by various main, longitudinal, transverse or even oblique grooves, the elementary blocks being able moreover to comprise various incisions or finer lamellae.
- the grooves constitute channels intended to evacuate the water during rolling on wet ground and define the leading edges of the sculpture elements.
- the tread When a tire is new, the tread is at its maximum height. This initial height may vary depending on the type of pneumatic tire considered as well as the use for which it is intended; for example, “winter” pneumatic tires generally have a tread depth greater than that of “summer” pneumatic tires.
- “winter” pneumatic tires generally have a tread depth greater than that of “summer” pneumatic tires.
- the height of the elementary blocks of the tread decreases and the stiffness of these elementary blocks increases.
- the increase in stiffness of the elementary tread blocks leads to a reduction in certain performances of the tire, such as grip on wet ground.
- the water discharge capacities decrease greatly when the depth of the sculpture channels decreases.
- the deflection of a tire is defined by the radial deformation of the tire, or variation in the radial height, when the latter passes from a unloaded state to a statically charged state, under nominal load and pressure conditions. This arrow is called a static arrow.
- the deflection measured during variations in the nominal load is called dynamic deflection.
- the deflection measurement defined in the present invention relates to the dynamic deflection.
- the deflection measurement is a quantity commonly used to estimate the severity of the operating conditions of a tire from the point of view of the carcass endurance. It also makes it possible to determine the pressure and / or the load of a tire. It is useful to know these measures, especially for vehicle fleet managers or transport professionals. Indeed, in these activities, where the concept of cost is very important, it is useful to check the good conditions of use of the tires, in particular to allow multiple retreads of a tire. Indeed, an operation of the tire with too great sagging can lead to premature fatigue of the cables constituting the carcass of the tire, and thus prevent the use of this carcass for future retreading. In this way, the replacement of the carcass occurs later, which leads to a reduction in the cost price of tires per kilometer.
- Figure 1 shows the time response of such a sensor when a vehicle passes over the housing.
- the contact aid length of the tire is determined by measuring the intersection of the straight line with the response curve of the sensor.
- the curve presents a significant noise. It is therefore not possible to position the line at the lowest point of the curve; users of the box are therefore obliged to determine a height for the line, and this determination is sometimes somewhat unstable, since a small variation on the initial parameters can create a large difference in the output result leading to a determination of length distorted contact area.
- the invention therefore aims to propose a system and a method making it possible to remedy these drawbacks.
- the invention relates to a system for evaluating the condition of a tire installed on a vehicle, comprising a housing with an application face intended to be in contact with the surface of the tire, and a remote server, the housing including:
- Means for transmitting raw and / or corrected time data from the sensor to the remote server the system further comprising on the remote server: Means for receiving vehicle context information from external sources,
- the senor is a Hall effect type sensor, which makes it possible to measure the distance which separates said sensor from the metallic reinforcements constituting the tire.
- the measurements made during the passage of the tire make it possible, by comparison, to determine the evolution of the radius of curvature.
- Other technologies can be used, such as optical distance measurement means such as laser profilometer, photometry or projection of light fringes.
- the tire condition parameter is included in the group comprising a wear profile, a deflection measurement, a length of contact area, a pressure and a load.
- the context information of the vehicle is included in the group comprising: the speed of one or more tires, the thermal drift of the sensor or sensors.
- the information is obtained from external sources which do not belong to the system which is the subject of the invention.
- Several types of external sources can be considered.
- the information is obtained from a database which includes, for each type of tire, data relating to the thermal drift of the sensor. Thermal drift is encountered, for example, when the sensor performs a measurement very shortly after being activated, which is the case in a system according to the invention where the sensors are stopped between two measurements to save energy.
- the speed information can be obtained by any speed determining means: the vehicle GPS system, an external radar ...
- the context information obtained by the system according to the invention is not raw information, but information processed upstream to obtain the best possible accuracy; thus, instead of receiving the speed of a tire, the system can receive speed information corresponding to an average of the speeds of the various tires of the vehicle.
- the individual speed of each tire can be determined from the time response of different sensors included in the housing, and these different speeds can be combined to obtain consolidated speed information, allowing to reinforce the accuracy of the subsequent determination of wear and / or deflection.
- the steps of combining / processing information is not carried out in the box but by the calculation means present on the remote server.
- the system comprises, in the housing, means for correcting the time data before transmission.
- means for correcting the time data before transmission can be of different kinds: filtering means to limit the noise coming from the Hall sensor, or else compression or sub-sampling means to limit the amount of information to be transmitted.
- the invention also relates to a method for evaluating the condition of a tire installed on a vehicle, implemented by a system according to the invention, the method comprising the following steps:
- a step of transmitting this data to a remote server A step of transmitting this data to a remote server, A step of receiving context data from external sources,
- the tire condition parameter is included in the group comprising a level of wear, a deflection measurement, a length of contact area, a pressure, and load.
- the context information of the vehicle is included in the group comprising: the speed of one or more tires, the thermal drift of one or more sensors.
- the determining step comprises a step of comparing the temporal data with predetermined charts.
- FIG 1 Figure 1, already described, shows the time response of a Hall sensor integrated in a prior art case.
- Figure 2 shows an example of a housing of a system according to the invention.
- FIG. 2 shows a vehicle 5, the tire 8 of which rolls on a housing 6 belonging to an evaluation system according to the invention.
- the figure shows a passenger vehicle but such a system can also be used for any other vehicle, such as a truck or a bus.
- the detection of the state of wear of the tire 8 is made when the tire rolls over the housing 6 without it being necessary to stop the vehicle or to remove the tire from the vehicle.
- the housing 6 is integrated into the rolling floor. Indeed, if the housing is projecting, the dynamic deflection is modified when the vehicle climbs on the housing, which can lead to errors in determining the deflection.
- the housing is in the form of a retarder for land vehicles made of a material capable of withstanding the passage of multiple tires without degrading.
- the material is, for example, a composite based on vinyl ester resin, reinforcing glass fibers, and various additives well known to those skilled in the art.
- the housing can take any other form of portable object having a flat bottom surface allowing positioning on a rolling floor.
- the floor on which the housing is placed is prepared with suitable concrete and a fine leveling, allowing good flatness to be obtained.
- the housing comprises an application face intended to be in contact with the surface of the tire and at least one sensor placed in the housing capable of measuring the distance which separates said sensor from the metal reinforcements constituting the tire.
- the box comprises a plurality of sensors, distributed equally over a transverse line.
- the sensors are staggered on two lines.
- Each sensor comprises for example a source of static or alternating magnetic field and an adjacent sensitive element, the source being a coil or a permanent magnet and the sensitive element a Hall effect sensor whose output signal can, for example, be a function the level of the local magnetic induction field.
- the sensitive element is positioned so that the intensity of the magnetic field varies when the distance d between the metal reinforcements of the tire and the sensor decreases.
- the time output of such a Hall effect sensor is shown in FIG. 1.
- these time data are transmitted to a remote server on which calculation means are installed allowing the processing of these data.
- the data can be filtered, compressed or subsampled before transmission.
- the corrected data set is obtained by carrying out a hierarchical extraction of the characteristics of the raw data set.
- the calculation means have charts representing wear and deflection according to different parameters related to the vehicle, and / or the type of tire and / or the running conditions . These charts represent generic models describing the longitudinal and lateral curvature of a standard tire crown as a function of the tire deflection.
- the calculation means determine the closest chart, and deduce the most probable deflection and wear.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1873346A FR3090870A3 (fr) | 2018-12-19 | 2018-12-19 | Procédé et système d’évaluation de paramètres d’un pneumatique |
| FR1900879A FR3090871A1 (fr) | 2018-12-19 | 2019-01-30 | Procédé et système d’évaluation de paramètres d’un pneumatique |
| PCT/FR2019/053147 WO2020128323A1 (fr) | 2018-12-19 | 2019-12-18 | Procédé et système d'évaluation de paramètres d'un pneumatique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3899484A1 true EP3899484A1 (fr) | 2021-10-27 |
Family
ID=67514721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19845610.5A Withdrawn EP3899484A1 (fr) | 2018-12-19 | 2019-12-18 | Procédé et système d'évaluation de paramètres d'un pneumatique |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3899484A1 (fr) |
| CN (1) | CN113227750A (fr) |
| FR (2) | FR3090870A3 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024540051A (ja) * | 2021-11-01 | 2024-10-31 | ブリヂストン アメリカズ インコーポレイテッド | タイヤ空気圧測定を提供する磁気式走行システム |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2443965A (en) * | 2006-11-17 | 2008-05-21 | Treadcheck Ltd | Apparatus and method for monitoring tyre wear |
| GB2494618B (en) * | 2011-08-22 | 2018-03-21 | Wheelright Ltd | Vehicle tyre pressure measurement |
| JP5421418B2 (ja) * | 2012-03-21 | 2014-02-19 | コンパニー ゼネラール デ エタブリッスマン ミシュラン | タイヤ状態のための撓み特徴解析 |
| FR3020680B1 (fr) * | 2014-05-02 | 2017-11-24 | Michelin & Cie | Systeme d'evaluation de l'etat d'un pneumatique |
| JP6291366B2 (ja) * | 2014-06-25 | 2018-03-14 | 住友ゴム工業株式会社 | タイヤのシミュレーション方法及びシミュレーション装置 |
| FR3030374B1 (fr) * | 2014-12-17 | 2017-01-13 | Michelin & Cie | Procede de detection et d'alerte de l'etat de sous-gonflage d'un pneumatique |
| FR3030759B1 (fr) * | 2014-12-17 | 2017-01-13 | Michelin & Cie | Systeme d'evaluation de la vitesse d'un pneumatique |
| FR3030742A1 (fr) | 2014-12-17 | 2016-06-24 | Michelin & Cie | Systeme et procede d'evaluation de l'aire de contact d'un pneumatique |
| FR3039459B1 (fr) * | 2015-07-30 | 2017-08-11 | Michelin & Cie | Systeme d'evaluation de l'etat d'un pneumatique |
| FR3065075A1 (fr) * | 2017-04-07 | 2018-10-12 | Pourang Mahdavi | Dispositif pour la verification des pneumatiques |
| FR3067137A1 (fr) * | 2017-06-02 | 2018-12-07 | Compagnie Generale Des Etablissements Michelin | Procede de fourniture d'un service lie a l'etat et/ou au comportement d'un vehicule et/ou d'un pneumatique |
-
2018
- 2018-12-19 FR FR1873346A patent/FR3090870A3/fr active Pending
-
2019
- 2019-01-30 FR FR1900879A patent/FR3090871A1/fr not_active Withdrawn
- 2019-12-18 CN CN201980082981.XA patent/CN113227750A/zh active Pending
- 2019-12-18 EP EP19845610.5A patent/EP3899484A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3090871A1 (fr) | 2020-06-26 |
| CN113227750A (zh) | 2021-08-06 |
| FR3090870A3 (fr) | 2020-06-26 |
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