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    A Low-Cost Marker-Based Optical Motion Capture System to Validate Inertial Measurement Units

    Access Status
    In process
    Authors
    Siaw, Siaw
    Han, Yi Chiew
    Wong, Kiing
    Date
    2023
    Type
    Journal Article
    
    Metadata
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    Citation
    Siaw, T.U. and Han, Y.C. and Wong, K.I. 2023. A Low-Cost Marker-Based Optical Motion Capture System to Validate Inertial Measurement Units. IEEE Sensors Letters. 7 (2).
    Source Title
    IEEE Sensors Letters
    DOI
    10.1109/LSENS.2023.3239360
    Faculty
    Global Curtin
    Global Curtin
    Global Curtin
    School
    Office of Global Curtin
    Office of Global Curtin
    Office of Global Curtin
    URI
    http://hdl.handle.net/20.500.11937/97915
    Collection
    • Curtin Research Publications
    Abstract

    Commercialized marker-based optical motion capture system like Vicon is very expensive and not widely available. In the development of inertial measurement units, Vicon is required only for validation so sourcing for expensive system is undesirable. In this letter, a low cost alternative, which is also a marker-based optical motion capture system, is proposed to serve the purpose of validating inertial measurement units. Basically, the proposed system uses a smartphone camera to capture the motions of red markers and then track the coordinates of the markers followed by calculating the angle. The proposed system has a low average root mean square error of 0.83° when the distance between camera and markers is 120 cm. The method to synchronize inertial measurement units and camera data is also described in this letter as the starting time and sampling rate of the two systems are most likely different.

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