@incollection{ReinertJungSchwaneberg2009, author = {Dietmar Reinert and Norbert Jung and Oliver Schwaneberg}, title = {Hand and Finger Protection for Circular Saws}, series = {Zacharias, terHorst et al. (Hg.): Forschungsspitzen und Spitzenforschung. Innovationen an der FH Bonn-Rhein-Sieg, Festschrift f{\"u}r Wulf Fischer}, publisher = {Physica-Verlag}, address = {Heidelberg}, isbn = {978-3-7908-2126-0}, doi = {10.1007/978-3-7908-2127-7\_14}, pages = {137 -- 145}, year = {2009}, abstract = {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.}, language = {en} }