5th International ICST Conference on Body Area Networks

Research Article

Battery-Aware Power Management Techniques for Wearable Haptic Nodes

  • @INPROCEEDINGS{10.1145/2221924.2221967,
        author={Mahsan Rofouei and Elisabetta Farella and Davide Brunelli and Majid Sarrafzadeh and Luca Benini},
        title={Battery-Aware Power Management Techniques for Wearable Haptic Nodes},
        proceedings={5th International ICST Conference on Body Area Networks},
        keywords={Tactile stimulation haptic feedback sensor node power con- sumption minimization},
  • Mahsan Rofouei
    Elisabetta Farella
    Davide Brunelli
    Majid Sarrafzadeh
    Luca Benini
    Year: 2012
    Battery-Aware Power Management Techniques for Wearable Haptic Nodes
    DOI: 10.1145/2221924.2221967
Mahsan Rofouei1,*, Elisabetta Farella2, Davide Brunelli3, Majid Sarrafzadeh4, Luca Benini2
  • 1: UCLA
  • 2: Universita di Bologna
  • 3: University of Trento
  • 4: University of California, Los Angeles
*Contact email: mahsan@cs.ucla.edu


Haptic feedback provides an e ective means of transferring information through tactile stimulation. In this work we look into the use of tactors for haptic feedback in body-worn contexts where individuals are allowed to move around. In this context it is crucial to design low power systems that al- low the activation of multiple tactors at the same time with limited battery power. We investigate how to minimize tactor power consumption by tuning the characteristics of their excitatory signal and present an activation policy to maximize the number of tactors that can be simultaneously powered by a battery under a tight peak current constraint.The proposed optimizations reduce power consumption and allow a much higher number of simultaneously active tactors. Furthermore, we provide a design strategy whereby designers can tune the maximum number of simultaneously allowed active tactors based on battery and system requirements.