IEEJ Transactions on Sensors and Micromachines
Online ISSN : 1347-5525
Print ISSN : 1341-8939
ISSN-L : 1341-8939
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Volume 129, Issue 6
Displaying 1-4 of 4 articles from this issue
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Special Issue on “Sensing Technology on Human Science”
Special Issue Paper
  • A Support System for Motion Training Using Motion Capture and Acceleration Sensors
    Takahiro Hayashi, Rikio Onai
    2009 Volume 129 Issue 6 Pages 173-180
    Published: June 01, 2009
    Released on J-STAGE: June 01, 2009
    DOIhttps://doi.org/10.1541/ieejsmas.129.173
    JOURNAL FREE ACCESS
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    This paper presents a support system for motion training for dances, sports, gestures, etc. In our previous study, we developed a prototype system for supporting motion training using motion caputure, i.e., marker tracking using a DV camera. The prototype system scores a user's motion by comparing tracking data of the user and a model with DP matching. The prototype system has a limit that it cannot accurately obtain acceleration of each part of the body because marker tracking using a DV camera cannot obtain three dimensional motion. By this limit, two different motions sometimes cannot be distinguished. For more effective motion training, in this study, we propose a system combining motion capture and acceleration sensors. We have examined the effectiveness of using acceleration sensors in motion training by comparing the proposed system with the prototype system. Experimental results have shown that two different motions can be more clearly distinguished by using the acceleration sensors.
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  • Development of Cervical Spinal Cord Evoked Magnetic Field Measurement System Using SQUID Magnetometers
    Yoshiaki Adachi, Masakazu Miyamoto, Jun Kawai, Gen Uehara, Shigenori K ...
    2009 Volume 129 Issue 6 Pages 181-186
    Published: June 01, 2009
    Released on J-STAGE: June 01, 2009
    DOIhttps://doi.org/10.1541/ieejsmas.129.181
    JOURNAL FREE ACCESS
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    We are investigating an application of the biomagnetic measurement to non-invasive diagnosis of spinal cord function. Multichannel superconducting quantum interference device (SQUID) biomagnetometer systems for the measurement of the evoked magnetic field from spinal cords were developed as hospital-use apparatuses. The specific pattern transition of the spinal cord evoked field distribution was clearly observed. The conduction velocity of the cervical spinal cord, which is a significant information for the diagnosis of the dysfunction, was non-invasively estimated from the magnetic measurement.
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Special Issue Letter
Paper
  • Laser Spectroscopy of Minute Amounts of Gas Using Photonic Bandgap Fiber
    Tadashi Sugiyama, Toshitsugu Ueda, Joanna Pawlat
    2009 Volume 129 Issue 6 Pages 189-193
    Published: June 01, 2009
    Released on J-STAGE: June 01, 2009
    DOIhttps://doi.org/10.1541/ieejsmas.129.189
    JOURNAL FREE ACCESS
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    This paper describes laser spectroscopy using a photonic bandgap fiber as a gas cell. The photonic bandgap fiber has an air hole core about 10μm in diameter at its center. After passing the test gas and a laser beam through the core simultaneously, the absorption spectrum is measured by laser spectrometry. The new method has the following features compared with the conventional gas cell method or the white cell method:
    1. Extremely small amounts of gas can be measured.
    2. Stable and highly-sensitive measurement that is less subject to environmental fluctuation is possible.
    This paper confirms the effectiveness of the new method by measuring the absorption spectrum of ammonia gas.
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