| Summary: | 碩士 === 健行科技大學 === 土木工程系空間資訊與防災科技碩士班 === 103 === It has always been a difficulty for pedestrian navigation positioning in both indoor and outdoor area due to GPS signals obstructed by the buildings. This study is attempted to apply some kinds of sensors for developing and testing the relevant positioning techniques based on their point, line or plane type of observations.
For the technique using plane type of observations, the photos taken by the mobile devices and facing a wall constellated with the control points can be solved for the coordinates of the starting point through the intersection algorithm. The test results showed that the 2D positioning error was around 1 m when five well-distributed control points were adopted.
For the technique using point type of observations, the GPS/IMU MEMS device was applied for GPS position compensations and IMU drift corrections. The test results indicated that IMU can effectively operate 10 sec within a 5 m error and GPS/IMU can provide a 3 m level of 2D positioning error for continuous tracking.
For the technique using line type of observations, the ranges or orientations were obtained between the users and the ground beacons. With a single point operation mode, less than 8 m of 2D error was achieved by using short ranging to two beacons. With a multi-point operation mode, a 1 m level of 2D error was carried out when two beacons located at the starting and ending point were applied for a closure correction
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