主講人：Mun Choon Chan 教授           

SPEAKER National University of Singapore, Associate Professor

題　目：Using Mobile Phone Barometer for Low-Power Transportation Context Detection   

TOPIC     

時  間： 2016年11月18日(五)3:00PM - 4:00PM

DATE　　

地　點： 台達館 (Delta) 615

PLACE

Abstract: 

Accelerometer is the predominant sensor used for lowpower context detection on smartphones. However, accelerometer is orientation and position-dependent, requires a high sampling rate, and subsequently complex processing and training to achieve good accuracy. We present an alternative approach for context detection using only the smartphone’s barometer, a relatively new sensor now present in an increasing number of devices. The barometer is independent of phone position and orientation. Using a low sampling rate of 1 Hz, and simple processing based on intuitive logic, we demonstrate that it is possible to use the barometer for detecting the basic user activities of IDLE, WALKING, and VEHICLE at extremely lowpower. We evaluate our approach using 47 hours of realworld transportation traces from 3 countries and 13 individuals, as well as more than 900 km of elevation data pulled from Google Maps from 5 cities, comparing power and accuracy to Google’s accelerometer-based Activity Recognition algorithm, and to Future Urban Mobility Survey’s (FMS) GPS-accelerometer server-based application. Our barometer-based approach uses significantly less power and has comparable accuracy to both Google and FMS.

Bio: 

Mun Choon Chan graduated with a BS in Computer and Electrical Engineering from Purdue University, West Lafeyette, Indiana, in 1990, MSEE in 1993 and Ph.D. in 1997, both from Columbia University. In Columbia, he was a member of the comet group and worked under the supervision of Prof. Aurel A. Lazar. From 1997 to 2003, he was a Member of Technical Staff in the Networking Research Laboratory, Bell Labs, Lucent Technologies. He join NUS in 2004 and is currently an Associate Professor in School of Computing. His research interest is in wireless sensor network protocols and mobile sensing.

聯絡人：徐正炘教授