Orientation-Aware Localization System for Long Term Elder Care
Date Issued
2010
Date
2010
Author(s)
Jiing Song, Yi
Abstract
Since Taiwan has become the aging society, the demand of living and nursing for senior citizen is increasing. Hence, it is necessary to pay attention on this research area. We are interested in the long term life behavior of the senior residents in the nursing home because it is rarely explored and investigated. To observe their life behaviors, RSSI signature based localization system has been deployed on the 5th floor of senior care center in Taiwan University Hospital Beihu Branch (abbreviated in “Beihu senior care center”) to provide their location traces.
Our localization system is a fingerprint type system. It maps between the RSSI vector received the tag and RSSI signatures pre-collected on the localization area to infer the location of tag. Due to RSSI may be blocked by the human body, the major factor for the accuracy degradation is due to the orientation inconsistence of the training phase and tracking phase. So, in order to get more accurate location estimations, we propose the orientation-aware localization. It uses the gyro to detect the heading information and only RSSI signatures having identical orientation are selected to find the possible location. The experiment result shows that there is a significant
improvement after considering the heading information.
On the other hand, we collect long term seniors’ location traces to analyze their life behaviors. We find out that they spent much of the time to stay in the bedroom as well as the living space so the diversity of their space usage is low.
Subjects
Gyro
orientation-aware
RSSI signature
fingerprint
Type
thesis
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