TY - CHAP U1 - Buchbeitrag A1 - Reinert, Dietmar A1 - Jung, Norbert A1 - Schwaneberg, Oliver T1 - Hand and Finger Protection for Circular Saws T2 - Zacharias, terHorst et al. (Hg.): Forschungsspitzen und Spitzenforschung. Innovationen an der FH Bonn-Rhein-Sieg, Festschrift für Wulf Fischer N2 - In the presented project, a new approach for the prevention of hand movements leading to hazards and for non-contact detection of fingers is intended to permit comprehensive and economical protection on circular saws. The basic principles may also be applied to other machines with manual loading and / or unloading. With an automatic blade guard an improved integration of the protection system can be achieved. In addition a new detection principle is explained. The distinction between skin and wood or other material is achieved by a dedicated spectral analysis in the near infrared region. Using LED and photodiodes it is possible to detect fingers and hands reliably. With a kind of light curtain the intrusion of hands or fingers into the dangerous zone near the blade guard can be prevented. Y1 - 2009 SN - 978-3-7908-2126-0 SB - 978-3-7908-2126-0 U6 - https://doi.org/10.1007/978-3-7908-2127-7_14 DO - https://doi.org/10.1007/978-3-7908-2127-7_14 SP - 137 EP - 145 PB - Physica-Verlag CY - Heidelberg ER -