FR2907068A3 - Road safety method for e.g. car, involves comparing measured light intensity with given threshold value, and signaling lack of potential visibility of vehicle, when measured light intensity is greater than threshold value - Google Patents
Road safety method for e.g. car, involves comparing measured light intensity with given threshold value, and signaling lack of potential visibility of vehicle, when measured light intensity is greater than threshold value Download PDFInfo
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- FR2907068A3 FR2907068A3 FR0609079A FR0609079A FR2907068A3 FR 2907068 A3 FR2907068 A3 FR 2907068A3 FR 0609079 A FR0609079 A FR 0609079A FR 0609079 A FR0609079 A FR 0609079A FR 2907068 A3 FR2907068 A3 FR 2907068A3
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- vehicle
- light intensity
- threshold value
- measured
- measured light
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
- B60Q1/1415—Dimming circuits
- B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
- B60Q2300/30—Indexing codes relating to the vehicle environment
- B60Q2300/31—Atmospheric conditions
- B60Q2300/314—Ambient light
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
PROCÉDÉ DE SÉCURITÉ AMÉLIORANT LA VISIBILITÉ D'UN VÉHICULE AUTOMOBILE ETSAFETY METHOD IMPROVING THE VISIBILITY OF A MOTOR VEHICLE AND
DISPOSITIF DE MISE EN îUVRE La présente invention concerne un procédé permettant d'améliorer la visibilité d'un véhicule automobile vu de face, lorsque ce dernier est exposé à une source lumineuse intense située en arrière. L'invention est également relative à un dispositif de mise en œuvre d'un tel procédé de sécurité. The present invention relates to a method for improving the visibility of a motor vehicle seen from the front, when the latter is exposed to an intense light source located behind. The invention also relates to a device for implementing such a security method.
L'invention trouve une application particulièrement avantageuse, mais non exclusive, dans le domaine des systèmes d'assistance à la conduite pour véhicules automobiles. Lorsque le soleil est bas sur l'horizon, notamment lors des premières minutes de l'aube ou juste avant le crépuscule, son rayonnement s'avère particulièrement intense comparée à la luminosité générale ambiante. Cela génère de forts contrastes avec le reste de l'environnement, ce qui a pour conséquence de gêner considérablement la conduite automobile. Il devient notamment très difficile pour un automobiliste circulant sensiblement face au soleil, de discerner les usagers de la route venant quant à eux sensiblement dos audit soleil. The invention finds a particularly advantageous, but not exclusive, application in the field of driver assistance systems for motor vehicles. When the sun is low on the horizon, especially during the first minutes of dawn or just before dusk, its radiation is particularly intense compared to the general ambient light. This generates strong contrasts with the rest of the environment, which has the effect of significantly hinder driving. It becomes particularly difficult for a motorist circulating substantially in the sun, to discern the road users coming in turn substantially to said sun.
Or aujourd'hui, il n'existe aucun système de sécurité susceptible de prévenir ce type de problème. Et cela bien que la gêne visuelle engendrée, ainsi que les risques d'éblouissement, soient à l'origine de nombreux accidents de la route. But today, there is no security system that can prevent this type of problem. And this although the visual embarrassment generated, as well as the risk of glare, are at the origin of many road accidents.
Aussi, un problème technique à résoudre par l'objet de la présente invention, est de proposer un procédé de sécurité permettant d'améliorer la visibilité d'un véhicule automobile depuis une zone d'observation située sensiblement en face du véhicule, en cas d'exposition à 2907068 2 une source lumineuse intense placée sensiblement en arrière dudit véhicule. Une solution au problème technique posé consiste, selon la présente invention, en ce que le procédé de 5 sécurité comporte les étapes consistant à: - mesurer l'intensité lumineuse perceptible en arrière du véhicule, - comparer l'intensité lumineuse mesurée avec une valeur seuil donnée, 10 - signaler le manque de visibilité potentiel du véhicule dans le cas où l'intensité lumineuse mesurée est supérieure à la valeur seuil. L'invention telle qu'ainsi définie présente l'avantage d'offrir une solution permettant de détecter 15 spécifiquement la présence d'une source lumineuse située en arrière du véhicule, de quantifier l'intensité lumineuse de cette source de lumière, puis d'alerter le conducteur de ce phénomène dangereux et/ou les autres usagers de la route de la présence du véhicule. La 20 visibilité du véhicule automobile peut ainsi être avantageusement améliorée, notamment depuis tout point d'observation placé sensiblement en face dudit véhicule. Lorsqu'un manque de visibilité potentiel du véhicule est détecté, l'information peut être traitée de 25 plusieurs manières différentes. Conformément à un premier mode de réalisation préféré de l'invention, l'étape de signalisation peut consister à activer au moins un système d'alerte destiné au conducteur du véhicule automobile. Also, a technical problem to be solved by the object of the present invention is to provide a safety method for improving the visibility of a motor vehicle from an observation zone located substantially in front of the vehicle, in case of exposure to an intense light source placed substantially behind said vehicle. According to the present invention, a solution to the technical problem consists in that the safety method comprises the steps of: measuring the perceptible light intensity behind the vehicle; comparing the measured light intensity with a threshold value; given, 10 - signal the lack of potential visibility of the vehicle in the case where the measured luminous intensity is higher than the threshold value. The invention as thus defined has the advantage of offering a solution for specifically detecting the presence of a light source located behind the vehicle, of quantifying the light intensity of this light source, then of alert the driver of this dangerous phenomenon and / or other road users to the presence of the vehicle. The visibility of the motor vehicle can thus be advantageously improved, especially from any observation point placed substantially in front of said vehicle. When a potential lack of visibility of the vehicle is detected, the information can be processed in a number of different ways. According to a first preferred embodiment of the invention, the signaling step may consist in activating at least one alerting system intended for the driver of the motor vehicle.
30 Un objectif est dans un premier temps d'avertir le conducteur que son véhicule a de grande chance d'être peu visible par les usagers de la route circulant en sens inverse, de par la présence d'une source lumineuse excessivement intense placée derrière lui. Mais 2907068 3 conséquemment, le but est dans un second temps d'inviter le conducteur à signaler volontairement la présence de son véhicule, par exemple en allumant au moins un type de feux d'éclairage.A first objective is to warn the driver that his vehicle has a great chance of being little visible by road users traveling in the opposite direction, because of the presence of an excessively intense light source placed behind him. . But then, the goal is in a second time to invite the driver to voluntarily indicate the presence of his vehicle, for example by lighting at least one type of lighting lights.
5 Selon une caractéristique de ce premier mode de réalisation, chaque système d'alerte peut être choisi parmi un système d'alerte visuel tel qu'un voyant lumineux incorporé au tableau de bord, un système d'alerte sonore intégré à l'habitacle, un système 10 d'alerte vibratoire implanté par exemple dans le volant et/ou dans le siège du conducteur. Conformément à un second mode de réalisation préféré de l'invention, l'étape de signalisation peut également consister à commander l'allumage automatique 15 d'au moins un type de feux d'éclairage équipant le véhicule automobile. Une telle étape de signalisation revient ici à indiquer la présence du véhicule directement aux autres usagers de la router indépendamment de toute intervention 20 du conducteur dudit véhicule. Selon une caractéristique de ce premier mode de réalisation, les feux d'éclairage peuvent être notamment choisis parmi des feux de position, des feux de jour, des feux spécifiquement dédiés à la fonction de 25 signalisation, et de préférence des feux de croisement. Bien entendu, le premier et le second mode de réalisation précédemment décrits peuvent parfaitement être utilisés ensemble au sein d'un même système, voire même être combinés individuellement ou conjointement à au 30 moins une autre méthode de signalisation connue. De manière particulièrement avantageuse, la mise en œuvre de l'étape de signalisation peut être déclenchée si pendant une période de temps Tl, l'intensité lumineuse mesurée demeure constamment supérieure à la valeur seuil.According to a characteristic of this first embodiment, each warning system may be chosen from a visual warning system such as a light incorporated in the dashboard, a sound alert system integrated into the passenger compartment, a vibratory warning system 10 implanted for example in the steering wheel and / or in the driver's seat. According to a second preferred embodiment of the invention, the signaling step may also consist of controlling the automatic ignition 15 of at least one type of lighting lights fitted to the motor vehicle. Such a signaling step is here to indicate the presence of the vehicle directly to other users of the router regardless of any intervention 20 of the driver of said vehicle. According to a feature of this first embodiment, the lighting lights may be chosen in particular from position lights, daytime running lights, lights specifically dedicated to the signaling function, and preferably dipped beam headlamps. Of course, the first and second embodiments described above may well be used together within the same system, or even be combined individually or jointly with at least one other known signaling method. In a particularly advantageous manner, the implementation of the signaling step can be triggered if, during a period of time T1, the measured luminous intensity remains constantly higher than the threshold value.
2907068 4 L'objectif de cette première temporisation Ti est de confirmer que l'augmentation de luminosité n'est pas un phénomène ponctuel ; le but final étant d'éviter tout déclenchement intempestif de l'étape de signalisation, 5 par exemple suite à un appel de phare d'une voiture suiveuse. Dans la pratique, la durée de temporisation Ti sera inférieure à 60 secondes, et de préférence inférieure à 30 secondes.The objective of this first time delay Ti is to confirm that the increase in brightness is not a point phenomenon; the ultimate goal is to avoid any inadvertent triggering of the signaling step, 5 for example following a lighthouse call of a follower car. In practice, the delay time Ti will be less than 60 seconds, and preferably less than 30 seconds.
10 Conformément à une autre caractéristique avantageuse de l'invention, la mise en œuvre de l'étape de signalisation peut être maintenue pendant une période de temps T2, dès lors que l'intensité lumineuse mesurée redevient inférieure à la valeur seuil.According to another advantageous characteristic of the invention, the implementation of the signaling step can be maintained for a period of time T2, provided that the measured light intensity becomes lower than the threshold value.
15 La finalité de cette seconde temporisation T2 est ici de prévenir toute interruption intempestive de l'étape de signalisation, en cas de baisse d'intensité lumineuse passagère, par exemple à cause d'un changement de direction temporaire du véhicule.The purpose of this second delay T2 is here to prevent any untimely interruption of the signaling step, in the event of a decrease in transient luminous intensity, for example because of a temporary change of direction of the vehicle.
20 Dans la pratique, la durée de temporisation T2 sera de préférence comprise entre 5 et 15 minutes. Selon une particularité de l'invention, l'intensité lumineuse est mesurée de manière sensiblement unidirectionnelle.In practice, the delay time T2 will preferably be between 5 and 15 minutes. According to one particularity of the invention, the luminous intensity is measured substantially unidirectionally.
25 Il est entendu ici que cette caractéristique signifie que la détection s'opère autour d'une direction privilégiée, c'est-à-dire qu'elle n'est pas forcément effectuée suivant un axe unique au sens strict du terme, mais qu'elle n'est en aucun cas omnidirectionnelle.It is understood here that this characteristic means that the detection operates around a privileged direction, that is to say that it is not necessarily carried out along a single axis in the strict sense of the term, but that it is by no means omnidirectional.
30 De manière particulièrement avantageuse, l'intensité lumineuse est mesurée dans un cône de détection qui est orienté vers l'arrière, sensiblement suivant l'axe longitudinal (X-X) du véhicule automobile.Particularly advantageously, the light intensity is measured in a detection cone which is oriented towards the rear, substantially along the longitudinal axis (X-X) of the motor vehicle.
2907068 5 La présente invention concerne également les caractéristiques qui ressortiront de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.The present invention also relates to the features which will emerge from the description which follows, and which should be considered in isolation or in all their possible technical combinations.
5 Cette description, donnée à titre d'exemple non limitatif, se réfère aux dessins annexés dans lesquels: La figure 1 illustre en vue de côté un véhicule automobile qui est doté d'un dispositif de sécurité conforme à l'invention.This description, given by way of non-limiting example, refers to the accompanying drawings in which: Figure 1 illustrates in side view a motor vehicle which is provided with a safety device according to the invention.
10 La figure 2 représente le véhicule automobile de la figure 1 en vue de dessus. Pour des raisons de clarté, les mêmes éléments ont été désignés par des références identiques. De même, seuls les éléments essentiels pour la compréhension de 15 l'invention ont été représentés, et ceci sans respect de l'échelle et de manière schématique. Les figures 1 et 2 font donc apparaître un véhicule automobile 100 qui est équipé d'un dispositif de sécurité 1 permettant d'améliorer sa visibilité depuis une zoner 20 et ici tout point d'observation situé(e) sensiblement en face de lui, au cas où une source lumineuse intense 200 serait placée sensiblement en arrière dudit véhicule 100. Conformément à l'objet de la présente invention, le dispositif de sécurité 1 est tout d'abord doté d'un 25 capteur de lumière 10 qui est à même de mesurer l'intensité lumineuse perceptible en arrière du véhicule 100. Dans ce mode particulier de réalisation, choisi uniquement à titre d'exemple, le capteur de sécurité 10 30 se présente sous la forme d'un capteur de type CCD infrarouge qui est implanté en haut de la lunette arrière 110, et qui est orienté vers l'arrière dans le plan sagittal du véhicule 100.Figure 2 shows the motor vehicle of Figure 1 in top view. For the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this without regard to the scale and in a schematic manner. Figures 1 and 2 thus show a motor vehicle 100 which is equipped with a safety device 1 to improve its visibility from a zone 20 and here any observation point located (e) substantially in front of him, at in which case an intense light source 200 would be placed substantially behind said vehicle 100. In accordance with the object of the present invention, the safety device 1 is first provided with a light sensor 10 which is capable of measure the perceived luminous intensity behind the vehicle 100. In this particular embodiment, chosen solely by way of example, the safety sensor 10 30 is in the form of an infrared CCD type sensor which is implanted in top of the rear window 110, which is oriented towards the rear in the sagittal plane of the vehicle 100.
2907068 6 Le dispositif de sécurité 1 est également pourvu de moyens de traitement 20 qui sont en mesure de comparer l'intensité lumineuse mesurée avec une valeur seuil donnée.The safety device 1 is also provided with processing means 20 which are able to compare the measured light intensity with a given threshold value.
5 Concrètement, il s'agit dans cet exemple d'un boîtier électronique qui intègre de la mémoire afin de pouvoir stocker tous les paramètres nécessaires au bon fonctionnement du dispositif de sécurité 1, et notamment la valeur seuil d'intensité lumineuse.5 Concretely, it is in this example an electronic box that incorporates memory in order to store all the parameters necessary for the proper functioning of the safety device 1, and in particular the threshold value of light intensity.
10 Le dispositif de sécurité 1 dispose enfin de moyens de commande 30 qui sont aptes à signaler le manque de visibilité potentiel du véhicule 100, dans le cas où l'intensité lumineuse mesurée serait supérieure à la valeur seuil enregistrée.The safety device 1 finally has control means 30 which are able to signal the lack of potential visibility of the vehicle 100, in the case where the measured light intensity is greater than the recorded threshold value.
15 Dans le cas présent, les moyens de commande 30 consiste en un boîtier électronique qui est à la fois à même d'activer un système d'alerte visuel 40 implanté dans le tableau de bord 120 sous forme d'un voyant lumineuxr et en mesure de commander l'allumage 20 automatique des feux de croisement 130, 131 du véhicule automobile 100. Selon une particularité de l'invention, les moyens de traitement 20 sont en mesure de contrôler que l'intensité lumineuse mesurée demeure constamment 25 supérieure à la valeur seuil pendant une période de temps Tl déterminée. Selon une autre particularité de l'invention, les moyens de commandes 30 sont à même de signaler le manque de visibilité potentiel du véhicule 100 pendant une 30 période de temps T2 donnée, dès lors que l'intensité lumineuse mesurée redevient inférieure à la valeur seuil. Conformément à la figure 1, le cône de détection s'étend verticalement sur une plage angulaire al qui est inférieure à 45 , et de préférence inférieure à 30 .In this case, the control means 30 consists of an electronic box which is both able to activate a visual warning system 40 implanted in the dashboard 120 in the form of a warning light r and able to to control the automatic ignition of dipped headlights 130, 131 of the motor vehicle 100. According to a feature of the invention, the processing means 20 are able to control that the measured light intensity is constantly higher than the value threshold for a determined period of time T1. According to another particularity of the invention, the control means 30 are able to signal the lack of potential visibility of the vehicle 100 during a given period of time T2, provided that the measured light intensity becomes lower than the threshold value. . According to Figure 1, the detection cone extends vertically over an angular range al which is less than 45, and preferably less than 30.
2907068 7 On note par ailleurs que verticalement, le cône de détection s'étend majoritairement au dessus du plan horizontal. Ainsi qu'on peut le voir cette fois à la figure 2, 5 le cône de détection s'étend horizontalement sur une plage angulaire a2 qui est inférieure à 60 , et de préférence inférieure à 45 . On remarque par ailleurs ici qu'horizontalement, le cône de détection est centré par rapport au plan sagittal 10 du véhicule automobile 100. L'invention concerne de la façon la plus large tout véhicule automobile 100 doté d'au moins un dispositif de sécurité 1 tel que précédemment décrit.In addition, vertically, the detection cone extends mainly above the horizontal plane. As can be seen this time in FIG. 2, the detection cone extends horizontally over an angular range a2 which is less than 60, and preferably less than 45. Note also here that horizontally, the detection cone is centered relative to the sagittal plane 10 of the motor vehicle 100. The invention relates to the widest way any motor vehicle 100 having at least one safety device 1 as previously described.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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FR0609079A FR2907068A3 (en) | 2006-10-17 | 2006-10-17 | Road safety method for e.g. car, involves comparing measured light intensity with given threshold value, and signaling lack of potential visibility of vehicle, when measured light intensity is greater than threshold value |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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FR0609079A FR2907068A3 (en) | 2006-10-17 | 2006-10-17 | Road safety method for e.g. car, involves comparing measured light intensity with given threshold value, and signaling lack of potential visibility of vehicle, when measured light intensity is greater than threshold value |
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FR2907068A3 true FR2907068A3 (en) | 2008-04-18 |
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FR0609079A Pending FR2907068A3 (en) | 2006-10-17 | 2006-10-17 | Road safety method for e.g. car, involves comparing measured light intensity with given threshold value, and signaling lack of potential visibility of vehicle, when measured light intensity is greater than threshold value |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008051591A1 (en) | 2008-10-14 | 2010-04-15 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling visibility of e.g. motor vehicle, involves determining light distribution of light source, and controlling set of parameters for outlook of observation position depending on preset criteria |
DE102008051593A1 (en) | 2008-10-14 | 2010-04-15 | Bayerische Motoren Werke Aktiengesellschaft | Vehicle's visibility measurement determining method, involves transforming light distribution into perspective view of position such that another light distribution is retained, and determining measurements from latter light distribution |
DE102009057982A1 (en) | 2009-12-11 | 2011-06-16 | Bayerische Motoren Werke Aktiengesellschaft | Method for representation of perceptibility of e.g. motor vehicle, involves communicating part of perceptibility measure in combination with spatial directions and/or perception positions by output for passenger depending on criteria |
FR3131878A1 (en) * | 2022-01-17 | 2023-07-21 | Psa Automobiles Sa | Method for managing the switching on of the daytime rear position lights of a motor vehicle equipped with an ADAS system. |
WO2024133345A1 (en) * | 2022-12-22 | 2024-06-27 | Valeo Vision | Light signalling device for a motor vehicle with light power modulation as a function of the external luminosity |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102008051591A1 (en) | 2008-10-14 | 2010-04-15 | Bayerische Motoren Werke Aktiengesellschaft | Method for controlling visibility of e.g. motor vehicle, involves determining light distribution of light source, and controlling set of parameters for outlook of observation position depending on preset criteria |
DE102008051593A1 (en) | 2008-10-14 | 2010-04-15 | Bayerische Motoren Werke Aktiengesellschaft | Vehicle's visibility measurement determining method, involves transforming light distribution into perspective view of position such that another light distribution is retained, and determining measurements from latter light distribution |
DE102008051593B4 (en) * | 2008-10-14 | 2021-03-11 | Bayerische Motoren Werke Aktiengesellschaft | Method and system for determining the visibility of a vehicle |
DE102009057982A1 (en) | 2009-12-11 | 2011-06-16 | Bayerische Motoren Werke Aktiengesellschaft | Method for representation of perceptibility of e.g. motor vehicle, involves communicating part of perceptibility measure in combination with spatial directions and/or perception positions by output for passenger depending on criteria |
DE102009057982B4 (en) | 2009-12-11 | 2024-01-04 | Bayerische Motoren Werke Aktiengesellschaft | Method for reproducing the perceptibility of a vehicle |
FR3131878A1 (en) * | 2022-01-17 | 2023-07-21 | Psa Automobiles Sa | Method for managing the switching on of the daytime rear position lights of a motor vehicle equipped with an ADAS system. |
WO2024133345A1 (en) * | 2022-12-22 | 2024-06-27 | Valeo Vision | Light signalling device for a motor vehicle with light power modulation as a function of the external luminosity |
FR3144261A1 (en) * | 2022-12-22 | 2024-06-28 | Valeo Vision | LIGHT SIGNALING DEVICE FOR AUTOMABLE VEHICLES WITH MODULATION OF LIGHT POWER AS A FUNCTION OF EXTERNAL BRIGHTNESS |
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