Acoustic Target Tracking Using Tiny Wireless Sensor Devices. Qixin Wang, Wei-Peng Chen, Rong Zheng, Kihwal Lee, and Lui Sha Dept. of CS, UIUC. Introduction. Context Delay based sound source locating algorithm, requires large number of redundant sensors for accuracy.
Qixin Wang, Wei-Peng Chen, Rong Zheng, Kihwal Lee, and Lui Sha
Dept. of CS, UIUC
-Tiny wireless sensors to real-world acoustic tracking applications.
Partial info at one sensor site
Inaccuracy and unreliability of sensors
Effective use of scarce wireless bandwidth
Sensor clustering and coordination
Redundancy for robustness
Quality-driven (QDR) networking. Info. flow oriented v.s. raw data flow oriented.
Sensor (mica motes)
Sensors belong to clusters with singular cluster head.
Cluster head knows the locations of its slave sensors. Raw data gathered from sensors are processed in cluster head to generate localization results
Cluster Head (mono-board computer)
cluster covered area
router (mica motes)
Locate sound src loc.
Detected intersted sound
Broadcast sound signature
Cross-correlation to detect local arrival time
Report local arrival time
Suppose info/bit is fixed; the smaller Quality Rank, the better the quality.