Development of indoor positioning system with ultrasonic and infrared signals

Position measurement is one of the primal problems in wide range of applications such as air/land/marine vehicles tracking, automation systems, and equipment tracking in medical sector, robotics and sensor networks. Location information in outdoor application can be easily obtained from well-known systems such as GPS and GLONASS. Since GPS signal is not available in indoor area, several positioning systems have been developed for. But there is not a consensus for indoor positioning systems like the outdoor. In this study, a positioning system that uses ultrasonic and infrared signals is designed and implemented. The system is tested in 4m² coverage range and it is observed that the maximum absolute error is less than +/-2 cm.