FR2983948A1 - Method for calculating unpolluted route for road navigation system in car, involves receiving data representative of air quality in different locations, and calculating unpolluted route using received data - Google Patents

Abstract

The method involves receiving data representative of air quality in different locations (E2), and calculating an unpolluted route using the received data (E3). The data representative of air quality in various locations are derived by processing (E1) data contained in messages from a fleet of vehicles equipped with toxicity sensors, where each message includes data representative of clean air and a location of an issuer of the corresponding message. The levels of pollution is displayed (E4) on a map indicating the unpolluted route. Independent claims are also included for the following: (1) a server for processing data representative of air quality (2) a road map display device (3) a computer program for calculating an unpolluted route.

Description

The present invention relates generally to the fields of telecommunications and the automobile, and more specifically to the field of road navigation. BACKGROUND OF THE INVENTION Road navigation software offers a multitude of services to drivers, since the display of their locations on a map in search of an optimal route, for example the fastest or with the least possible radars. These services are made possible by the precision of the GPS ("Global Positioning System") on-board tracking systems, as well as the increase in available traffic information. Some services try to make the trips for the motorists more comfortable. This is the case, for example, of the information service described in patent application EP1368789, which attempts to dissuade motorists from using congested or polluted road segments by increasing the road tariff on these road segments. Furthermore, the service described in the application DE102009046828, allows a vehicle to receive remotely shutter control order to ventilate the vehicle with the outside air, when a bad air quality is detected locally . However, these services do not allow a driver to escape a path with heavily polluted road segments, which is detrimental to drivers especially sensitive to ozone pollution. Indeed the patent application EP1368789, by increasing road rates, does not allow motorists to distinguish between congested road segment and polluted road segment.

One of the aims of the invention is to overcome at least some of the drawbacks of the prior art by providing a low-pollution route calculation method as well as a data processing server and a map display device, allowing a motorist to program in advance a route with as little pollution as possible. To this end, the invention proposes a method of calculating a lightly polluted route comprising: a step of receiving data representative of an air quality in different locations, and a step of calculating said low-pollution route using said received data, characterized in that said data representative of an air quality in different locations are derived from a data processing step contained in messages from vehicles of a fleet of vehicles equipped with sensors of toxicity, said messages each comprising a data representative of an air quality and a location of the vehicle transmitting the corresponding message. Thanks to the invention, air quality data directly related to road axes in real time over a potentially very large area are available, many vehicles now being equipped with toxicity sensors. These data, being transmitted to the vehicles, allow the navigation systems of these vehicles to determine in advance the least polluted routes possible.

According to an advantageous characteristic, said processing step comprises a step of aggregating said data contained in messages with data representative of air quality measurements not derived from vehicle toxicity sensors. By aggregating air quality data from traffic vehicle toxicity sensors with data from other sources of information on air pollution, such as AirParif® measuring devices, for example, drivers the most consistent and comprehensive data possible. According to another advantageous characteristic, said messages each comprise a temporal information linked to said datum representative of an air quality, as well as a measurement identifier linked to said datum representative of an air quality. This temporal information is used to update air quality data sent to vehicle navigation systems with more recent data. The measurement identifier makes it possible, for example, to know which measurement of particle content corresponds to said datum representative of an air quality. Thus with these two pieces of information, the server receiving these messages can update, independently of each other, different measurements from different sources.

According to another advantageous characteristic, the calculation method according to the invention further comprises a step of displaying pollution levels on a road map indicating said route with little pollution. A user of the method can thus view the pollution level of the calculated route on a scale of pollution levels, and determine whether the low-pollution route that is proposed to him is acceptable or not for him. The invention also relates to a data processing server representative of an air quality, characterized in that it comprises: - means for receiving data representative of an air quality in different locations, said data being contained in messages from vehicles of a fleet of vehicles equipped with toxicity sensors, said messages each comprising a data representative of an air quality and a location of the vehicle transmitting the corresponding message, - and means processing said data, said server being characterized in that said processing means further comprise means for aggregating said data with data representative of air quality measurements not issued by said fleet of vehicles, and in that it comprises means for sending aggregated data from said aggregation means to a low-pollution route calculation device. Said server is for example a software and / or hardware module integrated in a navigation system of a vehicle, or remote from the vehicle, for example hosted in a network of a telecommunications operator.

The invention also relates to a display device of a road map, connected to the communication network of a vehicle equipped with a toxicity sensor, comprising means for sending to a server according to the invention a message comprising a datum representative of an air quality and a location of said vehicle.

Said representative data of an air quality is for example representative of a level of closure of ventilation flaps controlled by said toxicity sensor. The invention further relates to a road map display device characterized in that it comprises means for implementing the method according to the invention. The invention also relates to a computer program, characterized in that it comprises instructions for implementing the method for calculating a low-pollution route according to the invention, when it is executed on a computer.

The data processing server according to the invention, the display devices according to the invention as well as the computer program according to the invention have advantages similar to those of the method for calculating a low pollution route according to the invention. .

Other characteristics and advantages will appear on reading a preferred embodiment described with reference to the figures in which: FIG. 1 represents a display device according to the invention and a data processing server according to the invention, in this preferred embodiment, and FIG. 2 represents steps of the method for calculating a low-pollution route according to the invention, in this preferred embodiment. According to a preferred embodiment of the invention shown in FIG. 1, a data processing server S hosted for example in a telecommunications network, for example receives periodically messages containing data representative of the quality of the air. in different places, sent by vehicles from a fleet of vehicles equipped with sensors of toxicity. It may be for example vehicles of a community of users who have agreed to provide this information to the server S. In FIG. 1 is shown a DV display device of such a vehicle, equipped with a toxicity sensor CT. The CT toxicity sensor is connected to a CAN communication network of the vehicle, enabling it to communicate with the DV display device, which integrates, for example, a road navigation system and a positioning device using, in particular, the GPS satellite positioning system. . Other localization devices are of course usable, for example localization methods using a mobile cellular network, as described in the 3GPP TS 25.305 standard (according to the English "Third Generation Partnership Project Technical Specification 25.305"). ), or hybrid tracking methods such as the "assisted GPS" method. The CT toxicity sensor regularly provides the DV display device via the CAN network, a data representative of the quality of the outside air at the location where the vehicle is located. This data corresponds for example to the value of a closing level of aeration flaps of the vehicle, or directly to a raw value corresponding to the amount of pollutants measured. Alternatively, the CT toxicity sensor provides several data representative of different particle ratios to the DV display device. The vehicle sends the current value of this data provided by the CT toxicity sensor to the server S in a message M by its means of sending ENW messages. This sending occurs for example: in "push" mode, periodically or on detection of a significant change in the value of this data representative of the quality of the air, that is to say on the initiative of the device DV display, or in "pull" mode that is to say on request of the server S. The display device DV also inserts in the message M sent to the data processing server S, the current location of the vehicle as well as the date and time at the time of sending the message M to the server S. In a variant, the server S itself associates a date and a time with the data provided by the toxicity sensor CT and received in the message M, depending on the date and time of receipt of this message M. Moreover, if alternatively the toxicity sensor provides several data corresponding to different particle rates, the message M sent to the server S comprises several data representative of the air quality, correspo at these different particle levels. The communication means between the data processing server S and the display device DV consist of: sending means ENW of messages and receiving means RECV messages, in the display device DV, as well as means of sending ENVS messages and receiving means RECS messages, in the server S data processing. These means of sending or receiving ENW, RECV, ENVS and RECS are for example hardware modules and / or software for sending short messages or SMS (according to the English "Short Message Service") in transparent mode, or even Wi-Fi or 3GPP IMS (IP Multimedia Subsystem) communication interfaces in the case where the sent M messages use the IP protocol.

The reception by the server S of message data processing M originating from a multitude of display devices of different vehicles on different road segments, such as the display device DV, is implemented by the reception means RECS of data and allows the implementation of a method for calculating a low pollution route according to the invention. The term "little polluted" refers to a level of pollution over the entire calculated route, anywhere below a threshold, or on average below that threshold. This threshold corresponds, for example, to the decision to close the ventilation flaps of the vehicles according to the concentration of pollutants measured. Such a threshold then corresponds to a variation of pollution because the toxicity sensors work in relative and not in absolute terms. The decision to close the shutters depends on a specific algorithmic strategy. As a variant, this threshold is a predetermined threshold, for example if advanced toxicity sensors are used that allow non-relative measurement of pollutants.

In particular, the data processing server S implements a preliminary step E1, represented in FIG. 2, of data processing contained in the messages M. This processing step E1 is implemented in a software module MT. It includes a substep of reading data representative of the air quality in different locations in the M messages and recording data read in a BDS database, and a sub-step of aggregation of these data with pollution level measurements made by sensors of organisms such as AirParif®. This substep of aggregation is implemented by the software module AG, using the database BDS in which are stored the data of AirParif received for example periodically by the server S data processing. Thus, for a data representative of the quality of the air reassembled in a message M for a given location and at a given moment, if the data processing server S has an AirParif® sensor of another data representative of the quality of the air in a place sufficiently close to the given place and at a moment sufficiently close to the given moment, it aggregates these two data. If these values correspond to the measurement of the same rate of particles then it consolidates these data in a single data corresponding for example to the average of their two values, otherwise it aggregates these values or determines the most coherent according to, for example, the freshness of the said information. It should be noted that the AirParif® sensor measures the particle levels 03, NO2 and PM10, while the toxicity sensor measures the level of particles CO, NO and NO2. Thus the server S can provide vehicle visualization devices with several data representative of the air quality corresponding to several rates of different particles, from the toxicity sensor and / or another fixed sensor such as the AirParif® sensor. . These data are each accompanied by an identifier for distinguishing the type of particle corresponding to each particle rate in the messages sent from the server S to the vehicle display devices. In this embodiment of the invention, the method for calculating a low-pollution route according to the invention is implemented in the display device DV. However, it should be noted that it is also possible to implement the calculation method according to the invention also in a device not necessarily equipped with a toxicity sensor or embedded in a vehicle. Indeed, it is for example implemented in its most basic form in a software module, this module being equipped with interfaces connecting it to means for receiving messages from the data processing server S, at a base station. map data, and preferably but not necessarily to a display screen. The method for calculating a lightly polluted route according to the invention comprises steps represented in FIG. 2. Stage E2 is the reception of data representative of an air quality in different locations, by the reception means RECV of the DV display device. This data is transmitted to it from the data processing server S having previously implemented the step E1, for example at the request of a user having requested the calculation of a low-pollution route. Step E3 is the calculation of a low-pollution route from said data received in step E2, a predetermined threshold pollution level, for example defined by the user, of one or more road maps contained in a BDV database, the location of the vehicle obtained for example by the GPS system and a destination defined by the user. The threshold level of pollution defined by the user may correspond to a particular particle level, and therefore for example only concern certain particles. Step E3 is implemented by calculation means MC of the display device DV, these means being for example a software module. The optional step E4 is finally the visualization of the low pollution route thus calculated, on a road map, with for example the display of pollution levels on different segments of this route. This step E4 is implemented by the display means MA of the display device DV. It should be noted that in this embodiment of the invention, the server S is a remote server, but it is conceivable to integrate it with an on-board navigation system of a vehicle which can itself be equipped with a display device according to the invention using the method for calculating a route according to the invention, this vehicle optionally being equipped with a toxicity sensor dating back a data representative of the quality of the outside air, to the server of its system navigation.

Claims (9)

REVENDICATIONS1. Method for calculating a low-pollution route comprising: a reception step (E2) of data representative of an air quality in different locations, and a calculation step (E3) of said low-pollution route using said received data, characterized in that said data representative of an air quality in different locations are from a processing step (El) of data contained in messages (M) from vehicles of a fleet of vehicles equipped with toxicity sensors (CT), said messages (M) each comprising a data representative of an air quality and a location of the vehicle transmitting the corresponding message (M). 2. Calculation method according to claim 1, characterized in that said processing step (E1) comprises a step of aggregating said data contained in messages (M) with data representative of non-standard air quality measurements. of vehicle toxicity sensors (CT). 3. Calculation method according to claim 1 or 2, characterized in that said messages (M) each comprise a temporal information related to said data representative of an air quality, and a measurement identifier related to said representative data of an air quality. 4. Calculation method according to any one of claims 1 to 3, characterized in that it further comprises a step of viewing (E4) pollution levels on a road map indicating said low pollution route. 5. Server (S) for processing data representative of an air quality, characterized in that it comprises: - means of reception (RECS) of data representative of a quality of the air in different locations , said data being contained in messages (M) originating from vehicles of a fleet of vehicles equipped with toxicity sensors (CT), said messages (M) each comprising data representative of an air quality and a location of the vehicle transmitting the corresponding message (M), and processing means (MT) of said data, said server being characterized in that said processing means (MT) further comprise means for aggregating (AG) said data with data elements. data representative of air quality measurements not issued by said fleet of vehicles, and in that it comprises means for sending (ENVS) aggregated data from said means of aggregation (AG) to a device (DV ) of callus slightly polluted route cul. 6. Display device (DV) of a road map, connected to the communication network of a vehicle equipped with a toxicity sensor (CT), comprising means for sending to a server (S) according to claim 5. a message (M) comprising a data representative of an air quality and a location of said vehicle. 7. Display device according to claim 6, characterized in that said data representative of a quality of air is representative of a level of closure of ventilation flaps controlled by said toxicity sensor (CT). 8. Display device (DV) of road maps characterized in that it comprises means for implementing the method according to any one of claims 1 to 4. 9. Computer program, characterized in that it comprises instructions for implementing the method according to any one of claims 1 to 4, when it is executed on a computer.