TRAFFIC SIGNS RECOGNITION DEVICE AND SPEED LIMIT PROVIDING METHOD THEREOF

• US 20170148320A1
• Filed: 11/18/2016
• Published: 05/25/2017
• Est. Priority Date: 11/19/2015
• Status: Active Grant

• Current Assignee: HL Klemove Corporation
• Original Assignee: Mando Corporation
• Inventors: RO, Dai Chang
• Granted Patent: US 10,089,870 B2
• Time in Patent Office: Days
• CPC Class Codes: G06V 20/582 of traffic signs
• CPC Class Codes: G08G 1/09623 Systems involving the acquisition of information from passive traffic signs by means mounted on the vehicle G08G1/0967 takes precedence
• CPC Class Codes: G08G 1/09626 where the origin of the information is within the own vehicle, e.g. a local storage device, digital map
• CPC Class Codes: G08G 1/0967 Systems involving transmission of highway information, e.g. weather, speed limits transmission of navigation instructions to the vehicle G08G1/0968

Abstract

Disclosed herein is a TSR (Traffic Sign Recognition) device which acquires information on a traffic sign positioned on a road through a camera and recognizes and outputs the speed limit of the acquired traffic sign information. The TSR device may include a navigation terminal and an electronic control unit. The navigation terminal may create and display a driving path of a vehicle. The electronic control unit may provide a speed limit updated from the navigation terminal, when a road attribute contained in the road information is changed or the sign information is indication information indicating a speed limit change, based on road information on the driving path and the sign information acquired through the camera, the road information being received from the navigation terminal while the vehicle travels along the driving path.

Claims

1. A TSR (Traffic Sign Recognition) device which acquires information on a traffic sign positioned on a road through a camera and recognizes and outputs the speed limit of the acquired traffic sign information, comprising:

a navigation terminal configured to create and display a driving path of a vehicle; and

an electronic control unit configured to provide a speed limit updated from the navigation terminal, when a road attribute contained in the road information is changed or the sign information is indication information indicating a speed limit change, based on road information on the driving path and the sign information acquired through the camera, the road information being received from the navigation terminal while the vehicle travels along the driving path.

2. The TSR device according to claim 1, wherein the road attribute comprises one or more of an expressway entrance, an expressway exit, a junction (JC), an intersection, a national highway changed from an expressway, an expressway changed from a national highway and a work zone.

3. The TSR device according to claim 2, wherein when the road attribute was changed after the vehicle passed the expressway entrance, the expressway exit or the junction, the electronic control unit decides the speed limit updated from the navigation terminal as the speed limit of a driving road.

4. The TSR device according to claim 1, wherein the indication information comprises one of indication information indicating an entry to expressway, indication information indicating an exit from expressway, indication information indicating a speed limit release, indication information indicating a restriction release, indication information indicating a work zone and indication information indicating a driving direction at an intersection.

5. The TSR device according to claim 4, wherein when the indication information indicates an entry to expressway or an exit from expressway, the electronic control unit decides the speed limit updated from the navigation terminal as the speed limit of the driving road.

6. The TSR device according to claim 4, wherein when the indication information indicates a driving direction at an intersection, the electronic control unit recognizes a first driving road corresponding to the direction of the vehicle that goes straight or turns left or right, according to the heading angle of the vehicle, and decides the speed limit updated from the navigation terminal as the speed limit of the driving road.

7. The TSR device according to claim 1, wherein the electronic control unit recognizes the speed limit of sign information acquired through the camera when the vehicle travels on the expressway, and decides the speed limit updated from the navigation terminal as the speed limit of the driving road, when the vehicle is traveling at a higher speed by a predetermined speed or more than the speed limit within a preset reference distance or traveling at a higher speed by a preset reference speed or more than the speed limit of the sign information acquired through the camera.

8. The TSR device according to claim 1, wherein when the vehicle is accelerated at a maximum reference speed or more after traveling at a preset minimum reference speed or less for a preset reference time or more when the vehicle travels on the expressway, the electronic control unit determines that the vehicle passes a toll gate, and decides the speed limit updated from the navigation terminal as the speed limit of the driving road after passing the toll gate.

9. A speed limit providing method of a TSR device which acquires information on a traffic sign positioned on a road through a camera and recognizes and outputs the speed limit of the acquired traffic sign information, comprising:

creating and displaying a driving path of a vehicle; and

providing a speed limit updated from a navigation terminal, when a road attribute contained in the road information is changed or the sign information is indication information indicating a speed limit change, based on road information on the driving path and the sign information acquired through the camera, the road information being received from the navigation terminal while the vehicle travels along the driving path.

10. The speed limit providing method according to claim 9, wherein the providing of the updated speed limit comprises:

determining whether the road attribute contained in the road information received from the navigation terminal indicates that a driving road was changed after the vehicle passed an expressway entrance, expressway exit or junction; and

deciding the speed limit updated from the navigation terminal as the speed limit of the changed driving road, when the driving road was changed.

11. The speed limit providing method according to claim 9, wherein the providing of the updated speed limit comprises:

determining whether the sign information is indication information indicating an entry to expressway or an exit to expressway; and

deciding the speed limit updated from the navigation terminal as the speed limit of the driving road, when the sign information is indication information indicating an entry to expressway or an exit to expressway.

12. The speed limit providing method according to claim 9, wherein the providing of the updated speed limit comprises:

determining the direction of the vehicle that goes straight or turns left or right according to the heading angle of the vehicle, when the sign information is indication information indicating a driving direction at an intersection; and

deciding the speed limit updated from the navigation terminal as the speed limit of a driving road corresponding to the determined direction.

13. The speed limit providing method according to claim 9, wherein the providing of the updated speed limit comprises recognizing the speed limit of the sign information acquired through the camera when the vehicle travels on an expressway, and deciding the speed limit updated from the navigation terminal as the speed limit of the driving road, when the vehicle is traveling at a higher speed by a predetermined speed or more than the speed limit within a preset reference distance or traveling at a higher speed by a preset reference speed or more than the speed limit of the sign information acquired through the camera.

14. The speed limit providing method according to claim 9, wherein the providing of the updated speed limit comprises:

determining whether the vehicle was accelerated at a maximum reference speed or more after traveling at a preset minimum reference speed or less for a preset reference time or more, when the vehicle travels on an expressway; and

determining that the vehicle passes a toll gate, when it is determined that the vehicle was accelerated at the maximum reference speed or more after traveling at the preset minimum reference speed or less for the preset reference time or more, and deciding the speed limit updated from the navigation terminal as the speed limit of the driving road after passing the toll gate.