• DocumentCode
    3449705
  • Title

    Towards a mobile airbag system using MEMS sensors and embedded intelligence

  • Author

    Shi, Guangyi ; Chan, Cheung-Shing ; Zhang, Guanglie ; Li, Wen J. ; Leong, Philip H W ; Leung, Kwok-Sui

  • Author_Institution
    Fac. of Eng., Centre for Micro & Nano Syst., Chinese Univ. of Hong Kong, Hong Kong
  • fYear
    2007
  • fDate
    15-18 Dec. 2007
  • Firstpage
    634
  • Lastpage
    639
  • Abstract
    This paper introduces the development of a mobile human airbag system that is designed for fall protection for the elderly. A Micro Inertial Measurement Unit (mulMU) that is 66 mm x 20 mm x 20 mm in size is built. This unit consists of three dimensional MEMS accelerometers, gyroscopes, and a Bluetooth module. It records human motion information, and, with a Support Vector Machine (SVM) training process, we can classify falls and other normal motions successfully with an SVM filter. Based on the SVM filter, an embedded DSP (Digital Signal Processing) system is developed for real-time fall detection. Also, a smart mechanical airbag deployment system is finalized. This system weighs 253.5 grams (including a 42.5 g compressed CO2 cylinder) and is 190 mm long, 57 mm wide, and 30 mm thick. Its size will be reduced in future to allow it to fit onto a belt. The response time of the trigger is 0.133 seconds, which allows more time for compressed air release before a person falls down to the ground. The integrated system is tested, and the feasibility of the airbag system for real-time fall protection is demonstrated.
  • Keywords
    Bluetooth; accelerometers; accident prevention; digital signal processing chips; geriatrics; gyroscopes; handicapped aids; microsensors; motion measurement; support vector machines; 3D MEMS accelerometers; Bluetooth module; MEMS sensors; embedded digital signal processing system; embedded intelligence; fall protection; gyroscopes; human motion information; micro inertial measurement unit; mobile airbag system; mobile human airbag system; real-time fall detection; smart mechanical airbag deployment system; support vector machine; Digital signal processing; Filters; Humans; Intelligent sensors; Micromechanical devices; Protection; Real time systems; Sensor systems; Support vector machine classification; Support vector machines; μIMU; DSP; Human Motion Sensing; MEMS; Mobile Airbags; SVM;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Robotics and Biomimetics, 2007. ROBIO 2007. IEEE International Conference on
  • Conference_Location
    Sanya
  • Print_ISBN
    978-1-4244-1761-2
  • Electronic_ISBN
    978-1-4244-1758-2
  • Type

    conf

  • DOI
    10.1109/ROBIO.2007.4522236
  • Filename
    4522236