A scalable tracking system using ultrasonic communication

Recently a new method of indoor ultrasonic localisation was introduced. It is called the phase accordance method and the authors claim that with this technology they could measure the 2D coordinates of the transmitter by a single receiver and a single transmission of ultrasound. Also this method is reported to be able to locate static objects more accurately than conventional methods. In this paper we evaluated the ability of the method to locate moving objects. Experiments with a prototype system and a moving robot were conducted, which showed satisfying results. Issues to be investigated in the future work are described.