Limiting speed display device for vehicle

• US 10,354,156 B2
• Filed: 02/15/2017
• Issued: 07/16/2019
• Est. Priority Date: 06/02/2016
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nishimura, Naoki, Iwaki, Yoshiya, Delefosse, Remi, Girond, Paul, Gillet, Christophe
• Primary Examiner(s): Jiang, Zaihan
• Assistant Examiner(s): Fereja, Samuel D
• Application Number:
  US15/433,440
• Publication Number:
  US 20170349097A1
• Time in Patent Office: 881 Days
• CPC Class Codes: G06V 20/582 of traffic signs

Abstract

A limiting speed display device for vehicle includes a position information receiver, map display device for displaying map image, imaging device, display device for road sign image, limiting speed information determining device, road attribute information determining device, country information acquiring device, limiting speed estimation device, and limiting speed display device. The limiting speed estimation device estimates limiting speed for the road based on country information and road attribute information when the limiting speed information determining device determines that the limiting speed information is not included and the road attribute information determining device determines that the road attribute information is included.

Claims

1. A limiting speed display device for vehicle mounted on a targeted vehicle, said limiting speed display device for vehicle comprising:

a position information receiver capable of receiving position information on said targeted vehicle, said position information transmitted from a satellite of a global navigation satellite system;

map display means for displaying map image including image representing a road on which said targeted vehicle runs by using said position information;

imaging means for generating picked up image data corresponding to a road sign when imaging said road sign;

a memory recording a plurality of road sign image data, each of said road sign image data representing each of road sign images, each of said road sign images corresponding to each of said road signs;

display means for road sign image for displaying said road sign image represented by a coincident data that is one of said road sign image data when said coincident data is coincident with said picked up image data generated by said imaging means;

limiting speed information determining means for determining whether or not limiting speed information that is information on limiting speed of said vehicle for road is included in at least one of map image data representing said map image and said road sign image data representing said road sign image displayed on said display means for road sign image;

road attribute information determining means for determining whether or not road attribute information that is information on attribute of said road is included in said map image data;

distance determining means for determining whether or not a distance is greater than or equal to a predetermined threshold,

wherein said targeted vehicle travels said distance while said road attribute information determining means determines that a same road attribute information is included in said map image data a consecutive number of times that is greater than or equal to a certain number;

country information acquiring means for acquiring country information that is information on a country where said road is installed based on one of said picked up image data and said position information;

limiting speed estimation means for estimating limiting speed for said road based only on said country information and said road attribute information when said limiting speed information determining means determines that said limiting speed information is not included and said distance determining means determines that said distance is greater than or equal to said threshold; and

limiting speed display means for displaying said limiting speed estimated by said limiting speed estimation means.

2. The limiting speed display device for vehicle according to claim 1, wherein,

said limiting speed display means is said display means for road sign image.

3. The limiting speed display device for vehicle according to claim 1, wherein,

said limiting speed information determining means is configured to determine that said limiting speed information is not included in said road sign image data representing said road sign image displayed on said display means for road sign image when said imaging means images said road sign indicating that restriction on said limiting speed for said road ends.

4. The limiting speed display device for vehicle according to claim 1, wherein,

said limiting speed information determining means is configured to determine that said limiting speed information is not included in said road sign image data representing said road sign image displayed on said display means for road sign image when said imaging means images said road sign indicating said road attribute information for said road.

5. The limiting speed display device for vehicle according to claim 1, wherein,

said targeted vehicle is provided with an adaptive cruise control controller for controlling said targeted vehicle so as to follow a leading vehicle with speed equal to or less than a predetermined setting limiting speed while maintaining a predetermined inter-vehicle distance with respect to said leading vehicle when said leading vehicle running on said road is positioned in front of said targeted vehicle,

said adaptive cruise control controller is configured to use said limiting speed estimated by said limiting speed estimation means as said setting limiting speed.

6. The limiting speed display device for vehicle according to claim 2, wherein,

said limiting speed information determining means is configured to determine that said limiting speed information is not included in said road sign image data representing said road sign image displayed on said display means for road sign image when said imaging means images said road sign indicating that restriction on said limiting speed for said road ends.