PWS & PHA: posture web server and posture history archiver

ABSTRACT

Our physical experiences are best represented by body movements. Many limitations of existing systems/devices, however, prevent their use in archival of daily experiences. This paper proposes an integrated systemcomposed of PWS (Posture Web Server) and PHA (Posture History Archiver); The PWS has a palm-size controller and 15 light-weight tilt sensor devices, newly developed by us. The feature of our tilt device lies in measurement of 360 degrees inclinations in two directions. The PWS is worn by a user, and always monitors his/her body posture. It acts as a posture web server, that is, it sends his/her current postural data upon request via a wireless network.The PHA running on a PC sends requests to PWS periodically via a network, and then archives a time series of his/her postures called posture history. The whole/part of the history can be visualized depending on his/her preferences. In this paper, system design issues, development of tilt sensor devices, implementation, and our experimental results are described.

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INDEX TERMS

Primary Classification:
  H. Information Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.0 General

General Terms:
Human Factors, Measurement

Keywords:
PHA, PWS, posture history archiver, posture web server, tilt sensor