FR3135684A1 - Method for acquiring the authorized speed in a motor vehicle, associated device and vehicle - Google Patents

Abstract

Method for acquiring a first authorized speed in a motor vehicle (100) characterized in that it comprises the following steps: First sending, of a first request to obtain the first authorized speed, comprising a first geographical location (900 ) of the motor vehicle (100), Receipt of a first response to the first request, comprising the first authorized speed and a first limit of validity of the first authorized speed, Waiting up to an instant, the instant being determined at from the first validity limit, Second sending, at the moment, of a second request to obtain a second authorized speed comprising a second geographical location of the motor vehicle (100). Figure for the abstract: figure 2

Description

Method for acquiring the authorized speed in a motor vehicle, associated device and vehicle

The invention relates to a method for acquiring the authorized legal speed limit (this is the authorized speed limit) for a motor vehicle.

There are today systems to recognize signs indicating the authorized speed encountered on the side of the road from a camera on board the motor vehicle. However, a sign is not always present in the event of an authorized speed change. Furthermore, signs do not systematically display an explicit speed (town entrance signs, end of speed limit signs, etc.) These systems are therefore insufficient to determine the authorized speed when a vehicle is traveling.

To remedy this drawback, the invention relates to a method for acquiring a first authorized speed (in other words an authorized legal speed limit) in a motor vehicle, for example traveling on a road, characterized in that it includes the following steps:

• First sending, for example via a telecommunications network, of a first request to obtain the first authorized speed, the first request comprising a first geographical location of the motor vehicle,
• Receipt of a first response to the first request, for example via the telecommunications network, comprising the first authorized speed and a first validity limit of the first authorized speed,
• Waiting up to one moment, the moment being determined from the first validity limit (during the wait, the vehicle preferentially drives on the road),
• Second sending, at the moment, for example via the telecommunications network, of a second request to obtain a second authorized speed, the second request comprising a second geographical location of the motor vehicle.

Waiting up to an instant before sending a second request helps limit the frequency of receptions and first and second sends. A higher frequency could overload the communications channels (the communications channels may include for example a telecommunications network), and/or possibly the server (below) receiving the first and second requests and sending the second response.

The second sending can of course be followed by the reception of a second response to the second request comprising a second authorized speed and a second limit of validity of the second authorized speed.

The first authorized speed is for example a maximum authorized speed. Alternatively, this is a minimum permitted speed.

The first location and/or the second location can be received (before sending) from a satellite geographic location module of the vehicle. Alternatively, the first location and/or the second location can be received, by wireless communication, from another location module present in another vehicle or along the road.

The first location and/or the second location includes for example a latitude, a longitude, a direction of travel, and preferably a timestamp (certain speed limitations are dependent on the time or day), as well as optionally any characteristic of the vehicle which may be of interest in determining the speed limits corresponding to it (type of vehicle and, if it is a heavy goods vehicle, its tonnage).

The first location and/or the second location may be that at the time of the first sending or that planned later according to an anticipated trajectory of the vehicle to take into account the latency time for receiving the first response.

The first sending and the second sending are for example addressed to the server below. Also, receipt of the first response (and optionally receipt of the second response) can be received from the server below.

According to one embodiment, the first authorized speed is displayed, for example by a screen of the vehicle, for example located in the passenger compartment, for example on the dashboard of the vehicle (alternatively, the display can be implemented by a mobile phone or connected watch of a vehicle passenger).

Alternatively, the first authorized speed is not displayed. The first gear can thus be used by an automated vehicle driving system to regulate the speed of the vehicle.

The telecommunications network is for example a mobile cellular telecommunications network.

Of course, it is possible to also rely on the recognition of speed limit signs to determine the authorized speed in addition to the first or second authorized speed received.

According to one embodiment, the first validity limit is a (variable) rolling distance from the first geographical location.

Alternatively, the first validity limit is a duration since receipt of the first response to the first request (this duration can for example be calculated by the server below from the rolling distance and the speed of the vehicle) .

For example, the moment is when the vehicle has traveled (in other words: completed traveling) the distance, possibly minus a constant margin (the server can take this margin into account, and possibly receive it from the vehicle if it is variable ), from the first geographic location.

Alternatively, the instant is when the vehicle has traveled a fraction of the distance (for example, half the distance).

It can be determined that the vehicle has traveled the distance by using an odometer (in other words: odometer).

The method of acquiring a first authorized speed according to the invention is for example implemented by an electronic device. The invention therefore also relates to an electronic device configured to implement the steps of the method for acquiring a first authorized speed according to the invention, and a motor vehicle comprising the electronic device. The electronic device may have the architecture of a controller or a microcontroller.

The invention also relates to a method for issuing a third authorized speed, characterized in that it comprises the following steps:

• Receipt of a third request to obtain the third authorized speed, for example via a telecommunications network, the third request comprising a third geographical location,
• Determination of the third authorized speed (from the third geographical location) and a third limit of validity of the third speed authorized from the third geographical location,
• Third sending, for example via a telecommunications network, of a third response to the third request including the third authorized speed and the third validity limit.

The third speed and/or the third validity limit are for example determined from a geographical map including an authorized speed depending on the geographical location. The map can be stored in the server below.

Alternatively, the third speed and/or the third validity limit are determined from a table providing the third speed and the third validity limit from the third geographical location.

According to one embodiment, the third validity limit is determined from a geographical position of a gear change closest to the third geographical location according to all the possible road routes on the map from this position (and preferably according to the direction of movement of the vehicle).

According to one embodiment, the third validity limit is a rolling distance from the first geographic location to the geographic position of the closest gear change.

For example, road routes have a length less than a predetermined threshold.

For example, the threshold is between 1 and 5 kilometers, but of course the threshold can be outside of this range.

According to one embodiment, the road routes are all those possible from the third geographical location (for example, of length less than the threshold).

Alternatively, the third limit of validity is determined from the location of the gear change closest to the third location until the next road crossing (thus, if there is no gear change until the next road crossing, the location of the speed change is the next road crossing).

The method of issuing a third authorized speed according to the invention is for example implemented by a server. The invention therefore relates to a server configured to implement the steps of the method for issuing a third authorized speed.

The invention finally relates to a system for determining an authorized speed comprising:

• The electronic device according to the invention,
• The server according to the invention,
• And for example, the telecommunications network,

the third request being the first request and/or the second request, and

the third response being the first response and/or the second response, and

the third validity limit being the first validity limit and/or the second validity limit.

The invention also relates to a computer program comprising instructions, executable by a microprocessor or a microcontroller, for implementing the transmission method according to the invention and/or the acquisition method according to the invention.

The characteristics and advantages of the electronic device, the motor vehicle, the system and the computer program are identical to those of the processes, which is why they are not included here.

It is understood that an element such as the electronic device or another element is "configured to" carry out a step or an operation, by the fact that the element comprises means for (in other words "is configured for" or "is adapted for") carry out the step or operation. These are preferably electronic means, for example a computer program, data in memory and/or specialized electronic circuits.

When a step or an operation is carried out by such an element, this generally implies that the element comprises means for (in other words "is configured for" or "is adapted for" or "is configured for") to carry out the step or the operation. It also concerns, for example, electronic means, for example a computer program, data in memory and/or specialized electronic circuits.

Other characteristics and advantages of the present invention will appear more clearly on reading the detailed description which follows including embodiments of the invention given by way of non-limiting examples and illustrated by the appended drawings, in which.

represents an electronic device of a motor vehicle, a vehicle and a system according to one embodiment of the invention.

represents the vehicle of the circulating, according to one embodiment of the invention.

represents the method of the invention, according to an exemplary embodiment, implemented by the electronic device, the vehicle and the system of the in the embodiment of the .

Detailed description of an example of embodiment of the invention

, the system 1000 for determining an authorized speed includes:

• The cellular telecommunications network 300,
• A server 400 (which has for example the architecture of a computer and therefore includes a microcontroller or a controller) comprising:
  • A geographical map 410,
  • A communication unit 420 with the cellular telecommunications network 300,
• A vehicle 100 traveling on a portion of road 200, comprising:
  • An electronic control unit 110 (which has for example the architecture of a microcontroller or a controller), which can also be called an electronic device,
  • A communication unit 120 with the cellular telecommunications network 300,
  • A 130 odometer,
  • A satellite geographic location module 140,
  • A 150 screen,

, the vehicle 100 travels on a portion of road 200 leading to a roundabout 700 which serves the portions of road 500, 550, 200, 250. The portions of roads 500, 550, 200, 250 measure approximately 500 meters, and the roundabout 700 measures approximately 160 meters in circumference.

With reference to Figures 1, 2 and 3, in step S10, the control unit 110 sends a request to obtain the authorized speed to the server 400 via the telecommunications network 300. The request includes the geographical location 900 (for example geographic coordinates) of the motor vehicle 100. The request can be sent by the communication unit unit 120.

In step S20, the server 400 receives the request to obtain the authorized speed via a telecommunications network 300, including the geographical location 900. The request can be received by the communication unit 420.

In step S30, the server 400 searches for the geographical location 900 in the map 410 and obtains the corresponding authorized speed limit. This speed limit can be a maximum speed limit of 70 kilometers per hour.

In step S40, the server 400 searches, in the map 410, the geographical position of the speed change closest to the geographical location 900 according to all road routes of length less than 1 kilometer from the geographical location 900 and in the direction of movement of the vehicle. , the geographical position of the speed change closest to the geographical location 900 is at the geographical position 920 distant by a distance d1 of 180 meters from the roundabout 700. A speed limit indication sign 820 may be present on the side of the road (but some geographic gear change positions do not have a sign). Two other speed changes, at geographic positions 910 and 930, are present on road routes less than 1 kilometer in length from geographic location 900, but are further from geographic location 900 than speed change 920.

For example, the rolling distance (in other words: the length of the route) from the first geographical location 900 to the gear change position 920 is 800 meters, which is therefore the limit of validity of the authorized speed at geographic location 900.

In step S50, the server 400 sends the response to the request to the control unit 110, via the telecommunications network 300. The response to the request includes the permitted speed of 70 kilometers per hour and the validity limit of 800 meters. The response can be sent by the communication unit 420.

In step S60, the control unit 110 receives the response including the authorized speed of 70 kilometers per hour and the validity limit of 800 meters.

In step S70, the authorized speed is displayed, for example by a screen 150 of the vehicle 100, for example located in the passenger compartment, for example on the dashboard of the vehicle 100.

At step S80, the control unit waits until the vehicle 100 has traveled 800 meters (or 800 meters minus 50 meters to take into account the delay in sending a request and receiving a response), whatever whether the portion 500, 550, 200 or 250 taken by the vehicle 100, and after 800 meters (or 750 meters), sends again a request to obtain an authorized speed including the new location of the vehicle. The process thus continues with a succession of requests, responses, and waits as the vehicle 100 circulates.

The control unit 110 can verify that the vehicle 100 has traveled 800 meters using the odometer 130.

Claims (10)

Method for acquiring a first authorized speed in a motor vehicle (100), characterized in that it comprises the following steps:

• First sending (S10), of a first request to obtain the first authorized speed, comprising a first geographical location (900) of the motor vehicle (100),
• Receiving a first response (S60) to the first request, comprising the first authorized speed and a first validity limit of the first authorized speed,
• Waiting (S80) until an instant, the instant being determined from the first validity limit,
• Second sending, at the moment, of a second request to obtain a second authorized speed comprising a second geographical location of the motor vehicle (100).

Method for acquiring the authorized speed according to the preceding claim in which the first limit of validity is a rolling distance from the first geographical location (900), Acquisition method according to any one of the preceding claims in which the instant is that when the vehicle (100) has covered the distance since the first geographical location (900). Electronic device (110) configured to implement the steps of the method according to any one of claims 1 to 3. Method for issuing a third authorized speed, characterized in that it comprises the following steps:

• Receipt of a third request (S20) to obtain the third authorized speed, comprising a third geographical location (900),
• Determination of the third authorized speed (S30) and determination of a third validity limit (S40) of the third authorized speed from the third geographical location (900),
• Third sending (S50), of a third response to the third request including the third authorized speed and the third validity limit.

Method for issuing a third authorized speed according to the preceding claim in which the third validity limit is determined from a geographical position (920) of a speed change closest (820) to the third geographical location (900) according to driving directions on a map (410). Method for issuing a third authorized speed according to the preceding claim in which the road routes have a length less than a predetermined threshold. Server (400) configured to implement the steps of the method according to any one of claims 5 to 7. System (1000) for determining an authorized speed comprising:

• The electronic device according to claim 4,
• The server according to claim 8,

the third request being the first request and/or the second request, and
the third limit of validity being the first limit and/or the second limit of validity, and
the third answer being the first answer. Motor vehicle (100) comprising the electronic device (110) according to claim 4.