FR2913386A1 - SYSTEM FOR WILD ROAD ADHERENCE LOSSING WARNING ALERT. - Google Patents
SYSTEM FOR WILD ROAD ADHERENCE LOSSING WARNING ALERT. Download PDFInfo
- Publication number
- FR2913386A1 FR2913386A1 FR0753639A FR0753639A FR2913386A1 FR 2913386 A1 FR2913386 A1 FR 2913386A1 FR 0753639 A FR0753639 A FR 0753639A FR 0753639 A FR0753639 A FR 0753639A FR 2913386 A1 FR2913386 A1 FR 2913386A1
- Authority
- FR
- France
- Prior art keywords
- road
- adhesion
- risk
- loss
- vehicle
- 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- Withdrawn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 claims abstract description 17
- 238000013459 approach Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 2
- 239000012780 transparent material Substances 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
- B60W40/06—Road conditions
- B60W40/068—Road friction coefficient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18145—Cornering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/143—Alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/146—Display means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2552/00—Input parameters relating to infrastructure
- B60W2552/40—Coefficient of friction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2555/00—Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
- B60W2555/20—Ambient conditions, e.g. wind or rain
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2556/00—Input parameters relating to data
- B60W2556/45—External transmission of data to or from the vehicle
- B60W2556/50—External transmission of data to or from the vehicle of positioning data, e.g. GPS [Global Positioning System] data
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Traffic Control Systems (AREA)
- Navigation (AREA)
Abstract
Procédé d'alerte de risques de perte d'adhérence en virage sur route mouillée.On mesure l'adhérence instantanée des roues du véhicule et l'on compare la valeur mesurée à une valeur théorique maximale. On émet un signal d'avertissement du conducteur (8) si la valeur mesurée (10) se rapproche de la valeur théorique maximale.Method of alerting the risk of loss of adhesion in a wet road corner.An instantaneous adhesion of the wheels of the vehicle is measured and the measured value is compared to a theoretical maximum value. A driver warning signal (8) is emitted if the measured value (10) approaches the maximum theoretical value.
Description
SYSTEME D'ALERTE DE RISQUE DE PERTE D'ADHERENCE EN VIRAGE SUR ROUTESYSTEM FOR LOW ROAD ADHESION LOSS HAZARD ALERT
MOUILLEEWET
DESCRIPTION DOMAINE TECHNIQUE Des données accidentologies montrent que dans une large majorité de cas (80%) les conducteurs des véhicules automobiles sont très près des limites d'adhérence en virage sans disposer des moyens de s'en rendre compte à temps. Il en résulte des risques d'accidents élevés. DESCRIPTION TECHNICAL FIELD Accidentology data show that in a large majority of cases (80%) motor vehicle drivers are very close to cornering grip limits without having the means to realize it in time. This results in high accident risks.
Par ailleurs, il arrive également que la configuration de la route incite à conduire avant tout par rapport à ce que font les autres véhicules, en oubliant ce paramètre de risque que représente la configuration du virage. C'est le cas par exemple lorsque l'on est dans une succession de virages se resserrant plus ou moins, en montée ou en descente, sur une route à plusieurs voies avec des véhicules plus lents sur la voie de droite. La présente invention a pour objet un système d'alerte qui remédie à ces inconvénients. Ce but est atteint, conformément à la présente invention, par le fait que l'on mesure l'adhérence instantanée des roues du véhicule, en ce que l'on compare la valeur mesurée à une valeur théorique maximale et en ce que l'on émet un signal d'avertissement si la valeur mesurée se rapproche de la valeur théorique maximale. Dans une version plus élaborée du procédé de l'invention, utilisant une cartographie de navigation, on fait figurer sur la cartographie de navigation routière les données correspondant à l'approche de configuration de virages considérés comme étant à risque sur route mouillée. In addition, it also happens that the configuration of the road encourages driving above all compared to what other vehicles do, forgetting the risk parameter that represents the configuration of the turn. This is the case for example when one is in a succession of turns becoming more or less tight, uphill or downhill, on a multi-lane road with slower vehicles in the right lane. The present invention relates to an alert system that overcomes these disadvantages. This object is achieved, in accordance with the present invention, by measuring the instantaneous adhesion of the wheels of the vehicle, in that the measured value is compared to a maximum theoretical value and in that one emits a warning signal if the measured value approaches the maximum theoretical value. In a more elaborate version of the method of the invention, using a navigation map, it is shown on the road navigation map data corresponding to the approach configuration of turns considered to be at risk on wet road.
Ces données sont par exemple. De préférence on fait figurer sur la cartographie de navigation routière les limitations de vitesse en vigueur dans ladite configuration de virages à risques et/ou les vitesses d'approche ou de franchissement à ne pas dépasser lorsque la route est mouillée. Dans une réalisation, on utilise un capteur de pluie ou un capteur de présence d'eau sur la chaussée. These data are for example. Preferably, the speed limits in effect in said configuration of risk bends and / or approach or crossing speeds not to be exceeded when the road is wet are preferably included in the road navigation cartography. In one embodiment, a rain sensor or a water presence sensor is used on the roadway.
Dans une autre réalisation on utilise un capteur d'adhérence instantanée entre la chaussée et les roues du véhicule. Dans encore une autre réalisation on utilise des capteurs mesurant le niveau des projections d'eau dans les passages des roues. D'autre part, l'invention concerne un procédé d'alerte de risque de perte d'adhérence en virage sur route mouillée qui comporte les étapes suivantes . on introduit dans une cartographie de navigation routière les données correspondant à l'approche de configuration de virages considérés comme à risques sur route mouillée ; - on introduit dans la cartographie des limitations de vitesse en vigueur dans la zone de virages considérés et/ou des vitesses d'approche ou de franchissement à ne pas dépasser si la route est mouillée ; - on détecte la présence de pluie et/ou la présence d'eau sur la chaussée et/ou le niveau de projection d'eau dans les passages de roues ; - on compare ces données la vitesse réelle du véhicule ; - on en déduit un niveau d'adhérence ; - on compare ce niveau d'adhérence avec le seuil de perte d'adhérence pour la configuration de virages concernés, en entrée de virage et durant son franchissement ; - si le niveau d'adhérence calculé est proche du seuil de perte d'adhérence, on en informe le conducteur du véhicule par l'émission d'un signal d'alerte l'incitant à réduire son allure. Avantageusement, en cas de diminution de l'allure du véhicule correspondant à un éloignement du seuil de perte d'adhérence, on supprime l'émission du signal d'alerte ou on diminue son intensité. Dans le cas d'une succession de virages resserrés ou à risque, cette alerte apparaît uniquement à proximité immédiate, en entrée et durant le franchissement de chaque virages, tant que l'allure du véhicule reste trop élevée, créant ainsi le risque de perte d'adhérence. Si le conducteur réduit son allure après l'apparition de l'alerte dans le/ou les premiers virages, le signal d'alerte n'apparaîtra plus à proximité et durant le franchissement des virages suivants, la diminution d'allure engendrant un éloignement du seuil de perte d'adhérence. In another embodiment, an instantaneous adhesion sensor is used between the roadway and the wheels of the vehicle. In yet another embodiment, sensors measuring the level of water splashes in the wheel wells are used. On the other hand, the invention relates to a method of alerting the risk of wet road cornering loss of adhesion which comprises the following steps. the data corresponding to the approach configuration of turns considered to be at risk on a wet road are introduced into a road navigation map; - the speed limits in effect in the cornering zone considered and / or approach or crossing speeds not to be exceeded if the road is wet are introduced into the map; - the presence of rain and / or the presence of water on the roadway and / or the level of water projection in the wheel arches is detected; - We compare these data the actual speed of the vehicle; a deduction level is deduced therefrom; this adhesion level is compared with the threshold of loss of adhesion for the configuration of the turns concerned, at the corner entry and during its crossing; - If the calculated level of adhesion is close to the threshold of loss of adhesion, it informs the driver of the vehicle by issuing an alert signal urging him to reduce his pace. Advantageously, in the event of a decrease in the speed of the vehicle corresponding to a distance from the threshold of loss of adhesion, the emission of the warning signal is suppressed or its intensity is reduced. In the case of a succession of tight turns or at risk, this alert appears only in the immediate vicinity, at the entrance and during the crossing of each turn, as long as the pace of the vehicle remains too high, thus creating the risk of loss of speed. adhesion. If the driver reduces his pace after the appearance of the alert in the / or the first turns, the warning signal will no longer appear in the vicinity and during the crossing of the following turns, the decrease in pace causing a distance from the threshold of loss of adhesion.
Cette alerte incitative s'appuie sur un signal et un nouveau principe d'affichage facilitant une acquisition immédiate et intuitive du niveau de risques et suggérant l'action à entreprendre, en l'occurrence modérer l'allure à proximité ou en entrée et/ou dans les virages sans pour autant entraver la vision de la scène de conduite par le conducteur. A cet effet, on informe le conducteur du véhicule par un pictogramme en rouge dans son champ de vision. Ce pictogramme, dans l'axe du volant en bas de pare-brise correspond à un panneau de signalisation de risque de chaussée glissante. Ce pictogramme s'affiche en rouge en entrée et durant le franchissement de chaque virage tant que la vitesse adoptée engendre une proximité dangereuse par rapport au seuil de perte d'adhérence sur chaussée glissante pour la configuration de virages concernés. Le conducteur pourra éventuellement choisir de disposer ou non de ce type d'alerte durant son trajet. Le système peut fonctionner selon différents modes d'aide à la navigation sélectionnable par le conducteur, par exemple un mode de trajet quotidien, un mode découverte, etc. Certains de ces modes peuvent fournir par défaut l'affichage d'une alerte. Dans une réalisation, on affiche le signal d'alerte au moyen d'un système d'affichage tête haute. Dans une autre réalisation on projette les informations sur une lame d'un matériau transparent tel que du verre disposée devant le pare-brise, dans l'axe du volant. This incentive is based on a signal and a new display principle facilitating an immediate and intuitive acquisition of the level of risk and suggesting the action to be taken, in this case to moderate the pace nearby or at the entrance and / or cornering without hindering the vision of the driving scene by the driver. For this purpose, the driver of the vehicle is informed by a red pictogram in his field of vision. This pictogram, in the axis of the steering wheel at the bottom of the windshield corresponds to a road sign of slippery road risk. This pictogram is displayed in red at the entrance and during the crossing of each bend as long as the speed adopted generates a dangerous proximity with respect to the threshold of loss of grip on a slippery road for the configuration of turns concerned. The driver may choose to have or not this type of alert during his trip. The system can operate in a variety of driver-selectable navigation assistance modes, such as a daily commute mode, a discovery mode, and the like. Some of these modes can provide by default the display of an alert. In one embodiment, the warning signal is displayed by means of a head-up display system. In another embodiment the information is projected on a blade of a transparent material such as glass arranged in front of the windshield, in the axis of the steering wheel.
Selon encore une autre réalisation, on affiche le signal d'alerte au travers d'une zone spécifique aménagée en partie haute de planche de bord, en partie basse du pare-brise, visible et lisible au- dessus de la jante du volant. Enfin, selon une autre réalisation, on utilise la peau la planche de bord pour y insérer le signal d'alerte dans l'axe de vision du conducteur. D'autres caractéristiques et avantages de la présente invention apparaîtront encore à la lecture de la description qui suit d'un exemple de réalisation donné à titre illustratif en référence à la figure annexée. Cette figure est un schéma de principe présentant le système d'alerte du conducteur face aux risques détectés de perte d'adhérence en raison d'une allure trop élevée à proximité ou en entrée de virages, puis durant son franchissement, lorsque la route est mouillée. La référence 2 désigne le pare-brise du véhicule et la référence 4 le montant de baie gauche. Par temps de pluie, les essuie-glaces 6 sont en fonctionnement. Un pictogramme 8 reprenant le symbole du panneau chaussée glissante s'affiche sur le pare-brise, en bas de celui-ci, face au conducteur. La vitesse réelle du véhicule 10 est également affichée. According to yet another embodiment, the warning signal is displayed through a specific area arranged in the upper part of the dashboard, in the lower part of the windshield, visible and legible above the rim of the steering wheel. Finally, according to another embodiment, the skin is used the dashboard to insert the warning signal in the driver's axis of vision. Other features and advantages of the present invention will become apparent upon reading the following description of an exemplary embodiment given by way of illustration with reference to the attached figure. This figure is a schematic diagram showing the driver alert system to the detected risks of loss of grip due to too high a pace near or at the entrance of turns, and during its crossing, when the road is wet. . The reference 2 designates the windshield of the vehicle and the reference 4 the amount of left bay. In rainy weather, the wipers 6 are in operation. A pictogram 8 showing the symbol of the slippery road sign appears on the windshield at the bottom of it, facing the driver. The actual speed of the vehicle 10 is also displayed.
Claims (14)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0753639A FR2913386A1 (en) | 2007-03-05 | 2007-03-05 | SYSTEM FOR WILD ROAD ADHERENCE LOSSING WARNING ALERT. |
EP08762165A EP2132075A2 (en) | 2007-03-05 | 2008-02-27 | Warning system that alerts a driver of the risk of losing grip when turning on a wet road |
PCT/FR2008/050330 WO2008119903A2 (en) | 2007-03-05 | 2008-02-27 | Warning system that alerts a driver of the risk of losing grip when turning on a wet road |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0753639A FR2913386A1 (en) | 2007-03-05 | 2007-03-05 | SYSTEM FOR WILD ROAD ADHERENCE LOSSING WARNING ALERT. |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2913386A1 true FR2913386A1 (en) | 2008-09-12 |
Family
ID=38562308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0753639A Withdrawn FR2913386A1 (en) | 2007-03-05 | 2007-03-05 | SYSTEM FOR WILD ROAD ADHERENCE LOSSING WARNING ALERT. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2132075A2 (en) |
FR (1) | FR2913386A1 (en) |
WO (1) | WO2008119903A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013011058A1 (en) * | 2011-07-19 | 2013-01-24 | Continental Teves Ag & Co. Ohg | Method for improving the driving stability |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4201142A1 (en) * | 1991-01-18 | 1992-08-20 | Mazda Motor | Vehicle speed controller for vehicle with navigation system |
DE4133060A1 (en) * | 1991-10-04 | 1993-04-08 | Mannesmann Ag | DRIVE ARRANGEMENT FOR A MOTOR VEHICLE |
DE19843395A1 (en) * | 1998-09-22 | 2000-03-23 | Volkswagen Ag | Method for speed and / or distance control in motor vehicles |
NL1011780C2 (en) * | 1999-04-13 | 2000-10-16 | Fs Man & Beheer B V | On board system for warning motorist of the risk of skidding, includes air humidity and tire traction measuring devices |
DE10258167A1 (en) * | 2001-12-17 | 2003-07-31 | Scania Cv Ab | Motor vehicle adaptive cruise control system incorporates a method for adjusting vehicle speed prior to the approach to a curve so that it is within a safe limit |
DE102004044788A1 (en) * | 2004-09-16 | 2006-04-06 | Continental Aktiengesellschaft | Determining friction between vehicle tire and road involves using algorithm that takes into account slip and braking or drive moment |
-
2007
- 2007-03-05 FR FR0753639A patent/FR2913386A1/en not_active Withdrawn
-
2008
- 2008-02-27 WO PCT/FR2008/050330 patent/WO2008119903A2/en active Application Filing
- 2008-02-27 EP EP08762165A patent/EP2132075A2/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4201142A1 (en) * | 1991-01-18 | 1992-08-20 | Mazda Motor | Vehicle speed controller for vehicle with navigation system |
DE4133060A1 (en) * | 1991-10-04 | 1993-04-08 | Mannesmann Ag | DRIVE ARRANGEMENT FOR A MOTOR VEHICLE |
DE19843395A1 (en) * | 1998-09-22 | 2000-03-23 | Volkswagen Ag | Method for speed and / or distance control in motor vehicles |
NL1011780C2 (en) * | 1999-04-13 | 2000-10-16 | Fs Man & Beheer B V | On board system for warning motorist of the risk of skidding, includes air humidity and tire traction measuring devices |
DE10258167A1 (en) * | 2001-12-17 | 2003-07-31 | Scania Cv Ab | Motor vehicle adaptive cruise control system incorporates a method for adjusting vehicle speed prior to the approach to a curve so that it is within a safe limit |
DE102004044788A1 (en) * | 2004-09-16 | 2006-04-06 | Continental Aktiengesellschaft | Determining friction between vehicle tire and road involves using algorithm that takes into account slip and braking or drive moment |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013011058A1 (en) * | 2011-07-19 | 2013-01-24 | Continental Teves Ag & Co. Ohg | Method for improving the driving stability |
CN103813950A (en) * | 2011-07-19 | 2014-05-21 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for improving driving stability |
US9409554B2 (en) | 2011-07-19 | 2016-08-09 | Continental Teves Ag & Co. Ohg | Method for improving the driving stability |
Also Published As
Publication number | Publication date |
---|---|
WO2008119903A3 (en) | 2008-12-18 |
EP2132075A2 (en) | 2009-12-16 |
WO2008119903A2 (en) | 2008-10-09 |
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ST | Notification of lapse |
Effective date: 20141128 |