A Motion-Tracking Ultrasonic Sensor Array for Behavioral Monitoring

作者：Cheng Roland^*; Heinzelman Wendi; Sturge Apple Melissa; Ignjatovic Zeljko

来源：IEEE Sensors Journal, 2012, 12(3): 707-712.

DOI：10.1109/JSEN.2011.2165942

• Image array
• Kalman filter
• sensor network
• ultrasound

The application of Kalman filtering to track subjects' movements during a behavioral experiment is discussed. Specifically, an overhead array of wireless, ultrasound sensors automatically tracks the position of a parent, child, and stranger over a 4.45 m x 4.23 m observation area. This WiPsy (Wireless sensors for Psychology research) system provides accurate, real-time quantitative metrics for psychological evaluation in lieu of traditional qualitative manual coding. Moreover, tracking subjects using ultrasound sensors is less error-prone than existing methods that track based on human coding of video. In particular, the Kalman filter, which forms the core of this tracking system, can locate targets with a mean square error of about 1.3 m(2). Overall, WiPsy strives to streamline data acquisition, processing, and analysis by providing previously unavailable assessment parameters.

• 出版日期2012-3