An Indoor Localization Framework for Four-Rotor Flying Robots Using Low-Power Sensor Nodes
The authors study the relevance of highly precise indoor localization techniques for quadrocopters and present an ultrasonic sensor system that achieves excellent localization performance, although the system has to rely on the limited computation resources of sensor nodes used for time-of-flight-based localization. Quadrocopters, i.e., flying four-rotor robots, are on-board sensor controlled systems. In comparison to classical monorotor objects (helicopters), the quadrocopters can be piloted with much lower effort. However, lateral drifts cannot be compensated for only referring to the built-in sensors. Nonetheless, the detection of such drifts is strongly necessary for indoor operation - without any corrections, the quadrocopter would quickly cause a collision.