FUNDAMENTAL STUDY ON INDOOR POSITIONING SYSTEM BY USING ULTRASONIC SENSOR

The purpose of this study is to apply positioning system to daily living spaces. This research focuses on ultrasonic sensor technology for positioning humans and things in an indoor space. The analysis is conducted by the comparison of different sensor layouts in daily space such as a corridor. Findings include; 1) the levels of accuracy and correct counts are affected by the sensor layouts, 2) the error of accuracy occurred by the reflection of ultrasonic near the wall area, 3) the direction of ultrasonic sensor tag is an effective element for better accuracy.