Wireless sensor networks for monitoring the daily interactions between user and objects

This article presents a hybrid system of wireless sensor networks and active tags in order to monitor user´s behaviors of handling objects. The sensor networks consist of an acceleration sensor node that the user carries and occupancy sensor nodes that are deployed in a workplace. The active tags, which are embedded with switch sensors, vibration sensors and occupancy sensors, are attached to objects. The sensor networks capture the user´s movements and the active tags detect the objects´ movements. The sensor nodes have the parent selection function that can allocate resources to the nodes. We demonstrate monitoring the user´s behaviors of handling the objects using the hybrid system. We also show that the proposed system provides the useful information for behavior classification.