POSITIONING DEVICE AND POSITIONING METHOD

• US 20110010089A1
• Filed: 06/17/2010
• Published: 01/13/2011
• Est. Priority Date: 07/09/2009
• Status: Active Grant

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Sambongi, Masao
• Granted Patent: US 8,862,396 B2
• Time in Patent Office: Days
• US Class Current: 701/207
• CPC Class Codes: G01C 21/1654 with electromagnetic compass
• CPC Class Codes: G01C 21/28 with correlation of data from several navigational instruments

Abstract

A positioning device including a movement measuring unit for measuring a relative positional change and a passing position calculation control unit for continuing measurement of the positional change of the movement measuring unit during movement, being given position data of any first point at the first point on a moving route excluding a start point, and determining position data of a point which has been passed before arrival at the first point on the basis of the given position data of the first point and data of the positional change continuously measured by the movement measuring unit.

Claims

1. A positioning device comprising:

a movement measuring unit for measuring a relative positional change; and

a passing position calculation control unit for continuing measurement of the positional change of the movement measuring unit during movement, being given position data of any first point at the first point on a moving route excluding a start point, and determining position data of a point which has been passed before arrival at the first point on the basis of the given position data of the first point and data of the positional change continuously measured by the movement measuring unit.

2. The positioning device according to claim 1, further comprising a positioning unit that can measure a present position, wherein the position data of the first point is given through measurement of the positioning unit.

3. The positioning device according to claim 1, further comprising a position calculating unit for accumulating the data of the positional change measured by the movement measuring unit into position data of the start point to calculate position data of each point on the moving route, wherein the passing position calculation control unit comprises:

a temporary position data calculation control unit for giving temporary position data of the start point to the position calculating unit, and making the position calculating unit to calculate temporary position data of each point on the moving route;

a position data storing unit for storing the temporary position data of each point obtained by the temporary position data calculation control unit; and

a position data correcting unit for shifting the temporary position data of each point stored in the position data storing unit so that position data calculated at the first point by the position calculating unit is identical to the given position data of the first point.

4. The positioning device according to claim 1, wherein the passing position calculation control unit comprises:

a change data storing unit for storing the data of the positional change measured by the movement measuring unit during movement; and

a passing position calculating unit for successively subtracting the data of the positional change stored in the change data storing unit from the given position data of the first point, thereby obtaining position data of respective points which have been passed before arrival at the first point.

5. A positioning method for obtaining position data on a moving route by using a movement measuring unit for measuring a relative positional change and a positioning unit that can measure a present position, comprising

a passing position calculation control step of continuing measurement of the positional change of the movement measuring unit during movement, being given position data of any first point at the first point on a moving route excluding a start point by the positioning unit, and determining position data of a point which has been passed before arrival at the first point on the basis of the given position data of the first point and data of the positional change continuously measured by the movement measuring unit.

6. The positioning method according to claim 5, further comprising a position calculating step of accumulating the data of the positional change measured by the movement measuring unit into position data of the start point to calculate position data of each point on the moving route, wherein the passing position calculation control step comprises:

a temporary position data calculation control step of giving temporary position data of the start point to the position calculating step, and making the position calculating step to calculate temporary position data of each point on the moving route;

a position data storing step of storing the temporary position data of each point obtained in the temporary position data calculation control step; and

a position data correcting step of shifting the temporary position data of each point stored in the position data storing step so that position data calculated at the first point in the position calculating step is identical to the given position data of the first point.

7. The positioning method according to claim 5, wherein the passing position calculation control step comprises:

a change data storing step of storing the data of the positional change measured by the movement measuring unit during movement; and

a passing position calculating step of successively subtracting the data of the positional change stored in the change data storing step from the given position data of the first point, thereby obtaining position data of respective points which have been passed before arrival at the first point.