EP4366996A1 - Procédé et dispositif de contrôle d'un véhicule - Google Patents
Procédé et dispositif de contrôle d'un véhiculeInfo
- Publication number
- EP4366996A1 EP4366996A1 EP22735205.1A EP22735205A EP4366996A1 EP 4366996 A1 EP4366996 A1 EP 4366996A1 EP 22735205 A EP22735205 A EP 22735205A EP 4366996 A1 EP4366996 A1 EP 4366996A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- parameters
- representative
- parameter
- information
- 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- Withdrawn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
Classifications
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- 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
- B60W30/14—Adaptive cruise control
- B60W30/16—Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
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- 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
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- 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
- B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
- B60W2420/40—Photo, light or radio wave sensitive means, e.g. infrared sensors
- B60W2420/403—Image sensing, e.g. optical camera
-
- 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
- B60W2554/00—Input parameters relating to objects
- B60W2554/40—Dynamic objects, e.g. animals, windblown objects
- B60W2554/404—Characteristics
-
- 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
- B60W2556/65—Data transmitted between vehicles
-
- 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
- B60W2754/00—Output or target parameters relating to objects
- B60W2754/10—Spatial relation or speed relative to objects
- B60W2754/30—Longitudinal distance
Definitions
- the present invention relates to methods and devices for controlling a vehicle, in particular a motor vehicle.
- the present invention also relates to a method and a device for controlling the inter-vehicle distance for a vehicle.
- ADAS systems from the English “Advanced Driver-Assistance System” or in French “Advanced Driving Assistance System”).
- ADAS systems from the English “Advanced Driver-Assistance System” or in French “Advanced Driving Assistance System”.
- the most advanced driving assistance systems provide control of the vehicle, which becomes a so-called autonomous vehicle, i.e. a vehicle capable of driving in the road environment without driver intervention.
- the grip between the vehicle and the surface of the road on which the vehicle is traveling forms part of these parameters describing the environment of the vehicle and useful to one or more systems on board the vehicle.
- Known methods for estimating grip are based, for example, on the use of a neuromorphic camera and an analytical model of the dynamics of the vehicle.
- a vehicle can determine the grip with the portion of road on which it is traveling, it is however difficult for it to know the grip for the vehicle or vehicles which surround it on this portion of the road.
- An object of the present invention is to solve at least one of the disadvantages of the technological background.
- Another object of the present invention is to improve safety for a vehicle traveling on a portion of road vis-à-vis other vehicles traveling around this vehicle.
- Another object of the present invention is, for a vehicle, to determine the grip of one or more vehicles traveling on the same stretch of road.
- the present invention relates to a method for controlling a first vehicle, the first vehicle traveling on a portion of road, a second vehicle traveling on the portion of road, the method being implemented by the first vehicle, the method comprising the following steps:
- the first vehicle and the second vehicle being connected via a wireless connection according to a communication mode of the vehicle-to-everything type, called V2X, obtaining comprises receiving the third set of parameters via the wireless connection.
- obtaining the third set of parameters comprises the following steps:
- the third set of parameters corresponds to a set of default parameters recorded in a memory of the first vehicle.
- the method further comprises the following steps:
- the first set of parameters comprises:
- the second set of parameters and the third set of parameters comprise at least one parameter from the following set of parameters:
- control of the first vehicle comprises a determination of an inter-vehicle distance between the first vehicle and the second vehicle according to the first information and the second information.
- the present invention relates to a device for controlling a vehicle, the device comprising a memory associated with a processor configured for the implementation of the steps of the method according to the first aspect of the present invention.
- the present invention relates to a vehicle, for example of the automobile type, comprising a device as described above according to the second aspect of the present invention.
- the present invention relates to a computer program which comprises instructions adapted for the execution of the steps of the method according to the first aspect of the present invention, this in particular when the computer program is executed by at least one processor.
- Such a computer program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other desirable form.
- the present invention relates to a computer-readable recording medium on which is recorded a computer program comprising instructions for the execution of the steps of the method according to the first aspect of the present invention.
- the recording medium can be any entity or device capable of storing the program.
- the medium may comprise a storage means, such as a ROM memory, a CD-ROM or a ROM memory of the microelectronic circuit type, or even a magnetic recording means or a hard disk.
- this recording medium can also be a transmissible medium such as an electrical or optical signal, such a signal being able to be conveyed via an electrical or optical cable, by conventional or hertzian radio or by self-directed laser beam or by other ways.
- the computer program according to the present invention can in particular be downloaded from an Internet-type network.
- the recording medium may be an integrated circuit in which the computer program is incorporated, the integrated circuit being adapted to execute or to be used in the execution of the method in question.
- FIG. 1 schematically illustrates an environment of a first vehicle, according to a particular and non-limiting embodiment of the present invention
- FIG. 2 schematically illustrates a process for controlling kinematic parameter(s) of the first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention
- FIG. 3 schematically illustrates a device configured to control the first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention
- FIG. 4 illustrates a flowchart of the different steps of a method for controlling the first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention.
- a method and a device for controlling a vehicle for example for controlling one or more kinematic parameters of the vehicle, will now be described in this which will follow with reference jointly to FIGS. 1 to 4.
- the same elements are identified with the same reference signs throughout the description which will follow.
- a first vehicle and a second vehicle travel on the same portion of road.
- the second vehicle travels for example in front of the first vehicle or behind the first vehicle.
- the first vehicle determines a first piece of information representative of the grip between the surface of the road section and the first vehicle, according to any method known to those skilled in the art.
- the first vehicle estimates a first set of parameters having an impact on grip, this first set of parameters comprising the parameters common to the first vehicle and to the second vehicle (for example the outside temperature, the level of humidity, the type of surface , etc.), based on the first information and a second set of parameters representative of characteristics of the tires of the first vehicle (for example the type of tire, the level of wear, the type of tread pattern, etc.).
- the first vehicle obtains a third set of parameters representative of characteristics of the tires of the second vehicle, for example by receiving this third set from the second vehicle or by determining it from, for example, one or more images of at least one of the tires of the second vehicle.
- the first vehicle finally determines a second piece of information representative of the adhesion between the surface and the second vehicle as a function of the first set of parameters (common to the first vehicle and to the second vehicle) and of the third set of parameters.
- This second information allows the first vehicle to determine one or more kinematic parameters (for example the speed) of the first vehicle, for example to maintain a sufficient safety distance between the first vehicle and the second vehicle according to the adhesion for the first vehicle and the second vehicle.
- Such a method allows a vehicle to determine the grip for one or more other vehicles circulating in its environment. Knowing the grip of other vehicles allows this vehicle to control its speed or the inter-vehicle distance of way, which makes it possible to increase the safety of vehicles circulating in the environment.
- FIG. 1 schematically illustrates an environment 1 comprising a first vehicle 10 and a second vehicle 11 traveling on a portion of road 101, according to a particular and non-limiting embodiment of the present invention.
- the first vehicle 10 follows the second vehicle 11 which precedes it.
- the second vehicle 11 follows the first vehicle 10 which precedes it.
- the first vehicle 10 follows the second vehicle 11 which precedes it, the first vehicle 10 being further followed by a third vehicle (not illustrated).
- the first vehicle 10 and the second vehicle 11 each correspond to a motor vehicle.
- the object of the invention is not limited to motor vehicles, but extends to any type of land vehicle, for example a truck, a bus, a motorcycle.
- the first vehicle 10 corresponds to a vehicle circulating under the total supervision of a driver or circulating in an autonomous or semi-autonomous mode.
- the first vehicle 10 circulates according to a level of autonomy equal to 0 or according to a level of autonomy ranging from 1 to 5 for example, according to the scale defined by the American federal agency which has established 5 levels of autonomy ranging from 1 to 5, level 0 corresponding to a vehicle having no autonomy, the driving of which is under the full supervision of the driver, and level 5 corresponding to a completely autonomous vehicle.
- the first vehicle 10 corresponds for example to a vehicle equipped with one or more driving assistance systems, called ADAS (from the English “Advanced Driver-Assistance System” or in French “Advanced Driving Assistance System “), such a system being configured to assist the driver of the first vehicle 10, or even replace the driver when the first vehicle 10 is traveling in an autonomous mode.
- ADAS driving assistance systems
- the first vehicle 10 advantageously embeds a system configured to determine the adhesion between the first vehicle 10 and the surface of the road portion 101, according to any methods known to those skilled in the art.
- the adhesion coefficient is for example estimated from information on the chassis of the first vehicle 10, this information being obtained from data coming from an inertial unit of the first vehicle 10, from the ABS system (from the German “Antiblockiersystem” or in French “anti-blocking wheel system”) and one or more speed sensors (such as an odometer for example).
- the inertial unit of the first vehicle 10 corresponds for example to the inertial unit of an ADAS system such as the electronic stability control system fitted to the first vehicle 10, known by the acronyms ESC (from the English “Electronic Stability Control” or in French “Electronic Stability Control”), DSC (from English “Dynamic Stability Control” or in French “Contror Dynamique de la Stmay”) or even ESP (from English "Electronic Stability Program” or in French “ Electronic Stability Program”).
- ESC from the English “Electronic Stability Control” or in French “Electronic Stability Control”
- DSC from English “Dynamic Stability Control” or in French “Contror Dynamique de la Ststructure
- ESP from English "Electronic Stability Program” or in French " Electronic Stability Program”.
- the coefficient of lateral adhesion representative of the adhesion between the tires of the first vehicle 10 and the portion of road is determined according to the method described in the document entitled "Estimation of the coefficient of maximum tire adhesion on the roadway applied to road safety” written by Raymond Ghandour, Alessandro Victorino, Ali Charara and Moustapha Doumiati, published in June 2011 in JDMACS2011 (hal-00697722).
- the maximum adhesion coefficient is determined by estimating the state of the surface from measurement of the vibrations of the chassis of the first vehicle 10 caused by the spraying of water sent by the tires, measurement of the speed and an estimate of the load of the first vehicle 10, as described in patent application FR2819590A1 published on July 19, 2002.
- the first vehicle 10 and the second vehicle 11 are configured to communicate data according to a vehicle-to-everything communication mode, called V2X (from the English “Vehicle-to-Everything”) based on a connection wireless.
- V2X vehicle-to-everything communication mode
- the first vehicle 10 and the second vehicle 11 advantageously communicate using the V2X communication system, for example based on the 3GPP LTE-V or IEEE 802.11p standards of ITS G5.
- each vehicle embeds a node to allow communication from vehicle to vehicle V2V (from the English “vehicle-to-vehicle”), from vehicle to infrastructure V2I (from the English “vehicle-to- -infrastructure”) and/or vehicle-to-pedestrian V2P, the pedestrians being equipped with mobile devices (for example a smart phone (“Smartphone”)) configured to communicate with vehicles.
- vehicle to vehicle V2V from the English “vehicle-to-vehicle”
- vehicle to infrastructure V2I from the English “vehicle-to- -infrastructure”
- vehicle-to-pedestrian V2P the pedestrians being equipped with mobile devices (for example a smart phone (“Smartphone”)) configured to communicate with vehicles.
- smart phone smart phone
- the first vehicle 10 and the second vehicle 11 each carry a communication system configured to communicate and exchange data between them, either by direct wireless link or via an infrastructure of a wireless communication network.
- the communication system of the first vehicle 10 (and of the second vehicle 11) comprises for example one or more communication antennas connected to a telematics control unit, called TCU (from the English "Telematic Control Unit"), itself connected to one or more computers of the onboard system of the first vehicle 10.
- TCU Telematics control unit
- the antenna(s), the TCU unit and the computer(s) form, for example, a multiplexed architecture for the performance of various useful services for the correct operation of the vehicle and for assisting the driver and/or the passengers of the vehicle in the control of the first vehicle 10, for example by determining kinematic parameters of the first vehicle 10.
- the computer(s) and the unit TCU communicate and exchange data between them via one or more computer buses, for example a CAN data bus type communication bus (from the English “Controller Area Network” or in French “Réseau de Contror "), CAN FD (from the English “Controller Area Network Flexible Data-Rate” or in French “Réseau de Contrôliv à Flow de Data Flexible”), FlexRay (according to the ISO 17458 standard) or Ethernet (according to the ISO/ IEC 802-3).
- CAN data bus type communication bus from the English “Controller Area Network” or in French “Réseau de Contrcomur ")
- CAN FD from the English “Controller Area Network Flexible Data-Rate” or in French “Réseau de Contrôliv à Flow de Data Flexible
- FlexRay accordinging to the ISO 17458 standard
- Ethernet accordinging to the ISO/ IEC 802-3
- the mobile communication infrastructure allowing the wireless communication of data between the first vehicle 10 and the second vehicle 11 comprises by example one or more communication equipment 110 of the relay antenna type (cellular network) or roadside unit, called UBR.
- the data is for example transmitted by the first vehicle 10 to the second vehicle 11 or by the second vehicle 11 to the first vehicle 10 via a relay antenna 110 and via one or more remote devices of the type server of the “cloud” 100 (or “cloud” in French), the antenna 110 being for example connected to the “cloud” 100 via a wired connection.
- the wireless communication system allowing the exchange of data between the first vehicle 10 and the second vehicle 11 corresponds for example to:
- V2I vehicle-to-infrastructure
- a communication system of the cellular network type for example a network of the LTE type (from the English “Long-Term Evolution” or in French “Long-term Evolution”), LTE-Advanced (or in French LTE-advanced) 4G or 5G LTE;
- LTE type from the English “Long-Term Evolution” or in French “Long-term Evolution”
- LTE-Advanced or in French LTE-advanced
- a WiFi type communication system according to IEEE 802.11, for example according to IEEE 802.11h or IEEE 802.11ac.
- the first vehicle 10 and the second vehicle 11 communicate and exchange data according to a direct communication mode, for example in accordance with:
- the first vehicle 10 embeds an ADAS system of adaptive cruise control, called ACC (from the English “Adaptive Cruise Control”), such a system having as its primary function the regulation automatically, in an adaptive manner.
- ACC ADAS system of adaptive cruise control
- the ACC system aims to achieve a setpoint acceleration which varies over time and which makes it possible to maintain or reach a regulation speed and/or to maintain a determined inter-vehicle distance (DIV) (expressed in meters, or in seconds in the case of the inter-vehicle time, called TIV) vis-à-vis the second vehicle 11 traveling in front of the first vehicle 10 in the same direction of travel on the same traffic lane.
- DIV inter-vehicle distance
- the first vehicle 10 is advantageously configured to implement the operations of the process described with regard to FIG. 2 and/or the steps of the method described with regard to FIG. 4. To this end, the first vehicle 10 embeds one or more processors , for example in one or more computers such as the computer described with reference to Figure 3.
- FIG. 2 schematically illustrates a process for controlling one or more kinematic parameters of the first vehicle of FIG. 1, according to a particular and non-limiting embodiment of the present invention.
- a first operation 21 a first piece of information representative of the adhesion between the surface of the road portion 101 and the first vehicle is obtained.
- This first piece of information corresponds for example to the maximum grip coefficient or to the maximum lateral grip coefficient.
- This first piece of information is determined according to any method known to those skilled in the art, for example according to one of the methods described with regard to FIG. 1.
- a second set of parameters representative of characteristic(s) of one or more tires fitted to the first vehicle 10 is obtained.
- the second set of parameters comprises for example one or more of the following parameters, according to any possible combination:
- - a parameter representative of the type of tire, for example winter tire, summer tire, all-season tire, the brand of tire, the type of rubber used to manufacture the tire;
- - a parameter representative of an inflation level, for example the pressure in bars.
- Some of these parameters are for example received from a memory associated with the computer implementing the process, for example for the parameters representative of the type of tire, dimensions, duration of use, type of tread pattern. This information or parameters are for example recorded in memory during the manufacture of the vehicle and updated when one or more tires are changed.
- TPMS Tire Pressure Monitoring System
- one or more of these parameters are entered by a user of the first vehicle 10, for example via an HMI (Human Machine Interface) such as a graphical HMI displayed on a screen, for example tactile, of the first vehicle 10.
- HMI Human Machine Interface
- one or more of these parameters are estimated from the driving history of the vehicle, for example from the date of installation of the tires and the mileage traveled by the vehicle since this installation, the type of road taken, the load on board the vehicle during the journeys made, etc., this information being for example recorded in the memory associated with the computer in charge of the processor or in other memories of one or more other computers of the on-board system of the first vehicle 10.
- a first set of adhesion parameters common to the first vehicle 10 and to the second vehicle 11 is determined from the first information obtained in the first operation 21 and from the second set of parameters obtained in the second operation 22 .
- This first set of parameters corresponds to a set of parameters involved in the determination of adhesion in combination with the second set of parameters.
- This first set of parameters advantageously groups together the parameters common to the first vehicle 10 and to the second vehicle 10, as well as to any other vehicle circulating in the environment 1, that is to say under the same conditions as the first vehicle 10 (e.g. same weather conditions, same stretch of road, i.e. same surface, same speed, etc.).
- the first set of parameters comprises for example one or more of the following parameters, according to all possible combinations:
- one or more parameters representative of meteorological conditions for example the outside temperature, the level of humidity in the air, the type of precipitation (rain, snow or ice), the intensity of the precipitation, the presence of ice on the road, etc ; and or
- one or more parameters representative of the section of road for example the type of surface, the state of the surface;
- At least one parameter representing a speed of the vehicle for example speed or acceleration.
- the grip for a given vehicle is a function of the characteristics of the tires of this vehicle, of the conditions in which this vehicle is traveling and of the speed of the vehicle, such a function 'f corresponding to a modeling of grip as a function of the parameters of the first set and the parameters of the second set, expressed as follows:
- Grip-io f (P common, P tires) With Grip- the grip of the first vehicle 10, P co mmuns corresponding to the first set of parameters and P pn eus corresponding to the second set of parameters.
- the parameters of the first set are estimated.
- the parameters representative of the characteristics of the tires of the first vehicle 10 that is to say the second set of parameters
- one or more of the parameters of the first set are determined by the first vehicle 10, for example measured from one or more ad hoc sensors on board the first vehicle 10.
- one or more of the parameters of the first set are determined or obtained by the first vehicle 10.
- one or more parameters representative of the meteorological conditions of environment 1 are measured, for example: - the outside air temperature by an on-board outside thermometer;
- a rain sensor of the automatic windscreen wiper system such a sensor measuring the intensity of a ray of infrared light projected on the windscreen and reflected by the latter.
- the speed of the first vehicle 10 is for example obtained from an odometer on board the first vehicle 10.
- one or more parameters representative of the portion of road are for example obtained from the infrastructure, for example from a server of the “cloud” 100, according to a V2I communication mode.
- the infrastructure receives for example the current position of the first vehicle 10 and transmits to the first vehicle 10 in return information on the state or the type of road taken by the first vehicle 10, this information being for example stored in the memory of the server of the “cloud” 100 (and provided for example by road users, for example via an on-board mobile application allowing vehicle drivers or persons in charge of road maintenance to report this information.
- the first set of parameters estimated in the third operation is corrected or adjusted from the information or values for all or part of these parameters obtained in the fourth operation 24.
- a third set of parameters representing characteristics of the tires (or of at least one tire) fitted to the second vehicle 11 is obtained.
- the parameters included in the third set of parameters advantageously correspond to the parameters of the second set of parameters listed above.
- This third set of parameters is for example transmitted by the second vehicle 11 to the first vehicle 10 according to the V2X communication mode, for example via the network infrastructure in V2I or by direct link, for example in V2V.
- the third set of parameters is stored in a memory on board the second vehicle 11 or is determined by the second vehicle 11, just like the second set of parameters by the first vehicle 10.
- the third set of parameters is determined by the first vehicle 10, for example from one or more images acquired by a camera on board the first vehicle 10.
- Such a camera on board the first vehicle 0 is advantageously positioned so as to acquire one or more images of the underbody of the second vehicle 11 so as to have at least one or two tires of the second vehicle 11 in the field of view of the camera .
- Such a camera advantageously comprises an optical system associated with a grid of photosensitive sensors (forming for example a photosensitive sensor of the CCD type (from the English “Charge-Coupled Device” or in French “Dispositif à transfert de charges” or CMOS (from English “Complementary Metal-Oxide-Semiconductor” or in French “semiconductor of complementary metal oxide”)) allowing the acquisition of image(s) of one or more tires of the second vehicle 11.
- CCD Charge-Coupled Device
- CMOS from English “Complementary Metal-Oxide-Semiconductor” or in French “semiconductor of complementary metal oxide
- An image acquired by the camera corresponds to a grid of pixels, with each pixel being associated with a level of gray (for example a level of gray whose value is between 0 and 255 if the first data of the image is coded on 8 bits), or a level of gray per color channel, for example a level of gray per RGB channel (from the English “Red, Green, Blue” or in French “Rouge, vert, blue”).
- the data associated with each pixel of an image form a set of data called raw data ed representative of the considered image.
- the image or images acquired by the camera are analyzed by a computer of the on-board system of the first vehicle 10 to determine one or more parameters of the third set, for example the dimensions of the tires, the level of wear, the type of sculpture, the type tires, etc.
- the analysis of the images is for example implemented by an automatic learning method, also called machine learning, such a method being for example implemented under the form of a neural network, for example a neural network of the convolutional neural network type, also called convolutional neural network or convolutional neural network and denoted CNN or ConvNet (from the English “Convolutional Neural Networks”).
- a neural network for example a neural network of the convolutional neural network type, also called convolutional neural network or convolutional neural network and denoted CNN or ConvNet (from the English “Convolutional Neural Networks”).
- CNN convolutional neural network
- ConvNet from the English “Convolutional Neural Networks”.
- feed-forward a network of acyclic artificial neurons
- Such a convolutional neural network comprises a convolutional part implementing one or more convolution layers and a densely connected part implementing for example one or more layers of densely connected (or entirely connected) neurons ensuring the classification of information according to a model of MLP type (from the English “Multi Layers Perceptron” or in French “Perceptrons multicouches”) for example.
- the first vehicle 10 uses a third set of default parameters, such a default set being for example stored in the memory associated with the computer implementing the process.
- This third set of default parameters is for example selected from a list of third sets of default parameters, depending on the situation. In all cases, the third set of default parameters corresponds to the most critical situation for the first vehicle 10 in terms of adhesion of the second vehicle 11.
- the third set of default parameters is representative of tires in very good condition ensuring the best grip on the second vehicle 11. This situation is the most critical for the first vehicle 10 because if the second vehicle 11 brakes suddenly in front of the first vehicle 10, the braking distance of the second vehicle will be the best because its grip will be maximum due to its tires ensuring good adhesion.
- the grip value associated with this third set of default parameters is for example equal to 0.8 in this case.
- the third set of default parameters is representative of tires providing low grip, for example tires with a high level of wear.
- This situation is the most critical for the first vehicle 10 because if the second vehicle 11 had to brake suddenly to avoid colliding with the first vehicle 10 in front of it, the braking distance of the second vehicle 11 will be the least good (the most long) because its grip will be low due to its tires providing minimal grip.
- the adhesion value associated with this third set of default parameters is for example equal to 0.4 in this case.
- a second piece of information representative of adhesion between the second vehicle 11 and the surface of the road portion 101 is determined from the first set of parameters obtained in the third operation 23 and from the third set of parameters obtained in the sixth operation 26.
- Adhcentraln f (P common, P tires) With Adhcharacter-n the adhesion of the second vehicle 11 , Pco mmuns corresponding to the first set of parameters and P′ pn eus corresponding to the third set of parameters.
- the first vehicle 10 is controlled on the basis of at least one kinematic parameter of the first vehicle determined according to the second information.
- the control of the first vehicle 10 includes for example the control of one or more on-board ADAS systems, such as the ACC system for example.
- the control may be partial in the case of driving under the supervision of the driver, for example by setting automatically or under the supervision of the driver one or more ADAS systems.
- Control can also be total in the case of driving in autonomous mode, by automatically setting one or more ADAS systems according to the grip information.
- the speed and/or the acceleration of the first vehicle 10 are adjusted, for example, so as to adjust the inter-vehicle distance (DIV) or the inter-vehicle time (TIV) between the first vehicle 10 and the second vehicle 11 to the adherence of the second vehicle 11 (as well as to that of the first vehicle 10).
- DIV inter-vehicle distance
- TIV inter-vehicle time
- the DIV is increased to avoid a collision between the first vehicle 10 and the second vehicle 11 if ever the second vehicle 11 were to brake suddenly.
- the DIV is higher the higher the grip of the second vehicle 11 and/or the lower the grip of the first vehicle 10.
- the second vehicle 11 is behind the first vehicle 10 and its adhesion is low (below a threshold, for example less than 0.6 or 0.5)
- the DIV is increased to avoid a collision between the first vehicle 10 and the second vehicle 11 if ever the first vehicle 10 were to brake suddenly.
- the DIV is higher the lower the grip of the second vehicle 11 and/or the higher the grip of the first vehicle 10.
- FIG. 2 has been described with reference to a particular embodiment, that is to say for a single second vehicle 11 .
- the invention is not limited to such an example but extends to a plurality of second vehicles circulating in the environment 1 of the first vehicle 10.
- the process described above is implemented to determine the adhesion associated with each second vehicle of the plurality.
- the settings kinematics of the first vehicle 10 are then adapted to this plurality of second vehicles to reduce the risk of collision for example.
- FIG. 3 schematically illustrates a device 3 configured to determine the adhesion of a second vehicle and to control the first vehicle accordingly, according to a particular and non-limiting embodiment of the present invention.
- the device 3 corresponds for example to a device on board the first vehicle 10, for example a computer.
- the device 3 is for example configured for the implementation of the operations described with regard to FIGS. 1 and 2 and/or of the steps of the method described with regard to FIG. 4.
- Examples of such a device 3 comprise, without being limited, on-board electronic equipment such as a vehicle's on-board computer, an electronic computer such as an ECU (“Electronic Control Unit”), a smart phone, a tablet, a laptop computer.
- ECU Electronic Control Unit
- the elements of device 3, individually or in combination, can be integrated in a single integrated circuit, in several integrated circuits, and/or in discrete components.
- the device 3 can be made in the form of electronic circuits or software (or computer) modules or else a combination of electronic circuits and software modules.
- the device 3 is coupled in communication with other similar devices or systems and/or with communication devices, for example a TCU (from the English “Telematic Control Unit” or in French “Unotti Telematics Control”), for example via a communication bus or through dedicated input/output ports.
- a TCU from the English “Telematic Control Unit” or in French “Unotti Telematics Control”
- communication bus for example via a communication bus or through dedicated input/output ports.
- the device 3 comprises one (or more) processor(s) 30 configured to execute instructions for carrying out the steps of the method and/or for executing the instructions of the software or software embedded in the device 3.
- the processor 30 can include integrated memory, an input/output interface, and various circuits known to those skilled in the art.
- the device 3 further comprises at least one memory 31 corresponding for example to a volatile and/or non-volatile memory and/or comprises a memory storage device which may include volatile and/or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, magnetic or optical disk.
- the computer code of the onboard software or software comprising the instructions to be loaded and executed by the processor is for example stored on the memory 31.
- the device 3 comprises a block 32 of interface elements for communicating with external devices, for example other vehicles, a computer or a remote server.
- the interface elements of block 32 comprise one or more of the following interfaces: RF radio frequency interface, for example of the Bluetooth® or Wi-Fi® type, LTE (from the English “Long-Term Evolution” or in French “Evolution in the long term”), LTE-Advanced (or in French LTE-advanced);
- USB interface from the English “Universal Serial Bus” or “Universal Serial Bus” in French
- FIDMI interface from the English “High Definition Multimedia Interface”, or “Interface
- the device 3 comprises a communication interface 33 which makes it possible to establish communication with other devices (such as other computers of the on-board system) via a communication channel 330.
- the interface communication interface 33 corresponds for example to a transmitter configured to transmit and receive information and/or data via the communication channel 330.
- the communication interface 33 corresponds for example to a wired network of the CAN type (from the English “ Controller Area Network” or in French “Network of controllers”), CAN FD (from English “Controller Area Network Flexible Data-Rate” or in French “Network of controllers with flexible data rate”), FlexRay (standardized by the ISO 17458 standard) or Ethernet (standardized by ISO/IEC 802-3 standard).
- the device 3 can supply output signals to one or more external devices, such as a display screen, one or more loudspeakers and/or other peripherals respectively via interfaces output not shown.
- FIG. 4 illustrates a flowchart of the different steps of a method for controlling the first vehicle 10, according to a particular and non-limiting embodiment of the present invention.
- the first vehicle advantageously travels on a portion of road with one or more second vehicles traveling on this same portion of road in front of and/or behind the first vehicle.
- the method is implemented by the first vehicle, for example by one or more processors of a device on board the vehicle 10 or by the device 3 of FIG. 3.
- a first cue representative of grip between the first vehicle and a coating of the road portion is determined.
- a first set of adhesion parameters common to the first vehicle and to the second vehicle is estimated from the first information and a second set of parameters representative of the characteristics of a set of tires fitted to the first vehicle.
- a third set of parameters representative of characteristics of a set of tires fitted to the second vehicle is obtained.
- a second piece of information representative of adhesion between the second vehicle and the surface of the road portion is determined from the first set of parameters and from the third set of parameters.
- the first vehicle is controlled according to at least one kinematic parameter of the first vehicle determined according to the second information.
- the variants and examples of the operations described in relation to FIGS. 1 and 2 apply to the steps of the method of FIG. 4.
- the present invention is not limited to the embodiments described above but extends to a method for controlling at least one ADAS system of the first vehicle and/or to a method for determining the adherence of a second vehicle traveling in front of or behind the first vehicle, such methods including secondary steps without departing from the scope of the present invention. The same would apply to a device configured for the implementation of such a method.
- the present invention also relates to a vehicle, for example an automobile or more generally an autonomous land motor vehicle, comprising the device 3 of FIG. 3.
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Traffic Control Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2107233A FR3124781B1 (fr) | 2021-07-05 | 2021-07-05 | Procédé et dispositif de contrôle d’un véhicule |
| PCT/FR2022/051061 WO2023281174A1 (fr) | 2021-07-05 | 2022-06-03 | Procédé et dispositif de contrôle d'un véhicule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4366996A1 true EP4366996A1 (fr) | 2024-05-15 |
Family
ID=77711036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22735205.1A Withdrawn EP4366996A1 (fr) | 2021-07-05 | 2022-06-03 | Procédé et dispositif de contrôle d'un véhicule |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4366996A1 (fr) |
| FR (1) | FR3124781B1 (fr) |
| WO (1) | WO2023281174A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2044848C3 (de) | 1970-09-10 | 1977-05-02 | Koch & Sterzel Kg | Roentgenzielgeraet |
| FR2819590B1 (fr) | 2001-01-18 | 2003-04-18 | Renault | Procede d'estimation de l'adherence maximale d'un vehicule automobile |
| KR101678583B1 (ko) * | 2014-10-29 | 2016-11-22 | 현대모비스 주식회사 | 차량 간 통신을 이용한 차간 거리 제어 시스템 및 그 제어방법 |
| DE102018217791B4 (de) * | 2018-10-17 | 2025-07-17 | Zf Friedrichshafen Ag | Vorrichtung und Verfahren zum Anpassen eines Abstands zwischen einem Ego-Fahrzeug und einem vorausfahrenden Fahrzeug |
| DE102019200348A1 (de) * | 2019-01-14 | 2020-07-16 | Continental Automotive Gmbh | Abstandsregeltempomat für ein Fahrzeug |
| KR102782227B1 (ko) * | 2019-08-01 | 2025-03-18 | 엘지전자 주식회사 | 차량 단말 및 그의 동작 방법 |
| EP3842307B1 (fr) * | 2019-12-27 | 2025-04-16 | Volvo Car Corporation | Système et procédé pour fournir des alertes de distance de sécurité et de vitesse de véhicule dans des conditions de route glissante |
| US11472414B2 (en) * | 2020-03-26 | 2022-10-18 | Intel Corporation | Safety system for a vehicle |
-
2021
- 2021-07-05 FR FR2107233A patent/FR3124781B1/fr active Active
-
2022
- 2022-06-03 WO PCT/FR2022/051061 patent/WO2023281174A1/fr not_active Ceased
- 2022-06-03 EP EP22735205.1A patent/EP4366996A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3124781B1 (fr) | 2023-05-19 |
| WO2023281174A1 (fr) | 2023-01-12 |
| FR3124781A1 (fr) | 2023-01-06 |
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