POSITION MEASUREMENT TERMINAL AND METHOD USING LOCATIONS OF POSITION IDENTIFYING TAGS

• US 20090153307A1
• Filed: 09/10/2008
• Published: 06/18/2009
• Est. Priority Date: 12/17/2007
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Sihn, Gyungchul, KIM, Jaeho
• Application Number:
  US12/207,952
• Publication Number:
  US 20090153307A1
• Time in Patent Office: Days
• US Class Current: 340/10.410
• CPC Class Codes: G01S 5/0054 of actual mobile position, i.e. position calculation on base station

Abstract

A position measurement terminal using locations of position identifying tags includes a photographing unit that photographs one of a plurality of position identifying tags including tag identifying information and processes an image of the photographed position identifying tag; a control and operation unit that performs a control and operation for location measurement of the position measurement terminal; and a communication unit that has access to a tag position information server that stores position information corresponding to tag identifying information of the individual position identifying tags and receives position information of the photographed position identifying tag.

Claims

1. A position measurement terminal using locations of position identifying tags, the position measurement terminal comprising:

a photographing unit that photographs one of a plurality of position identifying tags including tag identifying information and processes an image of the photographed position identifying tag;

a control and operation unit that performs a control and operation for location measurement of the position measurement terminal; and

a communication unit that has access to a tag position information server that stores position information corresponding to tag identifying information of the individual position identifying tags and receives position information of the position identifying tag.

2. The position measurement terminal of claim 1, further comprising:

a position information storage unit that stores the position information corresponding to the tag identifying information of the individual position identifying tags,

wherein the control and operation unit extracts the position information of the photographed position identifying tag from the position information storage unit.

3. The position measurement terminal of claim 1,

wherein the control and operation unit extracts tag identifying information from the image of the photographed position identifying tag and transmits the extracted tag identifying information to the tag position information server through the communication unit.

4. The position measurement terminal of claim 1,

wherein the control and operation unit calculates the location of the position measurement terminal on the basis of the position information of the position identifying tag, a photographing distance of the position identifying tag, and a photographing angle of the position identifying tag.

5. The position measurement terminal of claim 4, further comprising:

a direction measuring unit that calculates the photographing angle of the position identifying tag.

6. The position measurement terminal of claim 1, further comprising:

a movement distance measuring unit that measures a movement distance of the position measurement terminal; and

a direction measuring unit that measures a movement direction of the position measurement terminal,

wherein the control and operation unit traces the location of the position measurement terminal on the basis of the position information of the position identifying tag, information on a movement distance measured by the movement distance measuring unit, and information on a movement direction measured by the direction measuring unit.

7. The position measurement terminal of claim 6,

wherein the movement distance measuring unit is a pedometer that measures the number of steps of a user.

8. The position measurement terminal of claim 6,

wherein, when a new position identifying tag is photographed and new position information is obtained, the traced location of the position measurement terminal is updated.

9. The position measurement terminal of claim 7,

wherein the control and operation unit updates an average footstep value for each movement speed through learning using actually measured data.

10. A position measurement method using locations of position identifying tags, the position measurement method comprising:

allowing a photographing unit to photograph one of a plurality of position identifying tags including tag identifying information;

allowing a control and operation unit to extract the tag identifying information from the photographed position identifying tag; and

having access to a tag position information server that stores position information corresponding to the tag identifying information to acquire the position information corresponding to the extracted tag identifying information.

11. The position measurement method of claim 10, further comprising:

calculating the location of the position measurement terminal on the basis of the acquired position information in the acquiring of the position information, a photographing distance of the position identifying tag, and a photographing angle of the position identifying tag.

12. The position measurement method of claim 10, further comprising:

tracing the location of the position measurement terminal on the basis of the acquired position information in the acquiring of the position information, information on a movement distance measured by a movement distance measuring unit, and information on a movement direction measured by a direction measuring unit.

13. The position measurement method of claim 12, further comprising:

when position information of a new position identifying tag is acquired in the acquiring of the position information, updating the traced location of the position measurement terminal in the tracing of the location.

14. The position measurement method of claim 12, further comprising:

updating an average footstep value for each movement speed through learning using actually measured data,

wherein the movement distance measuring unit is a pedometer that measures the number of steps.