On the use of magnetic field disturbances as features for activity recognition with on body sensors

Gernot Bahle, Kai Kunze, Paul Lukowicz

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

We investigate the use of magnetic field disturbances as features for motion based, wearable activity recognition systems. Such disturbances are mostly caused by large metallic objects and electrical appliances, both of which are often involved in human activities. We propose to detect them by subtracting angular velocity values computed from the changes in the magnetic field vector from gyroscope signals. We argue that for activities that are associated with specific objects or devices such features increase system robustness against motion variations, sensor displacement and inter user differences. On a previously published data set of 8 gym exercises we demonstrate that our approach can improve the recognition by up to 31% over gyroscope only and up to 17% over a combination of a gyroscope and 3D accelerometer. Improvements of 9.5% are also demonstrated for user independent training as well as for the case of displaced sensors. A particularly interesting result is the fact that adding the magnetic disturbance features significantly improves recognition based on the vector norm of accelerometers and gyroscopes. The norm is often used when the orientation of the sensor is not known. This is common when using a mobile phone or other consumer appliance as a sensor.

本文言語English
ホスト出版物のタイトルSmart Sensing and Context - 5th European Conference, EuroSSC 2010, Proceedings
ページ71-81
ページ数11
DOI
出版ステータスPublished - 2010
外部発表はい
イベント5th European Conference on Smart Sensing and Context, EuroSSC 2010 - Passau, Germany
継続期間: 2010 11月 142010 11月 16

出版物シリーズ

名前Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
6446 LNCS
ISSN(印刷版)0302-9743
ISSN(電子版)1611-3349

Other

Other5th European Conference on Smart Sensing and Context, EuroSSC 2010
国/地域Germany
CityPassau
Period10/11/1410/11/16

ASJC Scopus subject areas

  • 理論的コンピュータサイエンス
  • コンピュータ サイエンス(全般)

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