RFID tag installation system using a vehicle and method thereof

• US 20050065724A1
• Filed: 02/26/2004
• Published: 03/24/2005
• Est. Priority Date: 09/23/2003
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: KIm, Seong Baek, Lee, Seung Yong, Lee, Jong Hun, Jang, Byung Tae, Choi, Ji Hoon, Choi, Kyoung Ho
• Granted Patent: US 7,272,502 B2
• Time in Patent Office: Days
• US Class Current: 701/213
• CPC Class Codes: G01S 13/825 with exchange of information between interrogator and responder
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 19/14 specially adapted for specific applications
• CPC Class Codes: G01S 2013/9329 cooperating with reflectors or transponders
• CPC Class Codes: G05D 1/0261 using magnetic plots
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/096758 where no selection takes place on the transmitted or the received information
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element

Abstract

The present invention relates to a radio frequency identification (RFID) tag installation system using a vehicle and method thereof. The RFID tag is installed on the road to provide a driver with position information and road information such as speed limit, road name. etc in his or her traveling region. By using our present invention, RFID tag can be installed with small manpower in short a time. The system uses two CCD cameras, two GPS receivers, an INS and a DMI, and includes: a vehicle position and yaw extractor by using the two GPS receivers; orientation extractor for the vehicle by using INS, a GPS/INS/DMI integrator for GPS outage and for INS error correction; two cameras interior/exterior orientation extractor for the CCD cameras; a target position extractor for finding 3-dimensional coordinates; a road information storage for supplying road information such as a speed limit and a rout number of a road; an RFID tag writer for inputting the information obtained from the target region position extractor and the road information storage; and an RFID tag installer for attaching the RFID tag on the road.

Claims

1. An RFID tag installation system using two CCD cameras, two GPS receivers, an INS, a DMI and a sensor synchronizer, being installed inside and outside of a vehicle, the system comprising:

a vehicle position (x, y, z) and yaw extractor by using the two GPS receivers;

an orientation (position, attitude) extractor for the vehicle by using INS;

a GPS/INS/DMI integrator for GPS outage and for INS error correction in real time or a post-processing stage;

a camera interior/exterior orientation extractor for estimating lens distortion, focal length, principle point, and orientation of the CCD camera;

a target position extractor for finding 3-dimensional coordinates of a road in which the RFID tag is installed;

a road information storage for providing road information such as a speed limit and a rout number of a road in which the RFID tag is installed;

a RFID tag writer for inputting 3-dimensional coordinates and road information to the RFID tag; and

a RFID tag installer for installing the RFID tag on the road.

2. The system of claim 1, wherein the RFID tag is attached to a screw, a nail or a reflection plate, thereby installed on the road.

3. An RFID tag installing method using two CCD cameras, two GPS receivers, an INS, a DMI and a sensor synchronizer, being installed inside and outside a vehicle, the method comprising the steps of:

(a) calculating orientation of the vehicle by using GPS/INS/DMI integration in real time or post-processing;

(b) while the step (a) is performed, extracting camera interior/exterior orientation by using self-calibration;

(c) finding 3-dimensional coordinates of a road in which the RFID tag is installed by using camera interior/exterior orientation extracted at the step (b), the vehicle orientation obtained at the step (a), and target region appearing in stereo images;

(d) inputting the road information supplied from a road information storage and the position information found at the step (c) to the RFID tag; and

(e) Installing the RFID tag on the road.

4. The method of claim 3, wherein, in the step (d), the road information and the 3-dimensional coordinates are converted into a format for an RFID tag writer and inputted to the RFID tag.

5. The method of claim 3, wherein, in the step (e), the RFID tag is attached to a screw, a nail or a reflection plate, and the screw, the nail or the reflection plate is installed on the road.