Helicopters in low-level flight are endangered by power lines or telephone wires, especially when flying at night and under poor visibility conditions. In order to prevent 'wire strike', Thomson has developed a lidar system consisting of a pulsed diode laser emitting in the near infrared region (lambda = 0.9 microns). The HOWARD (Helicopter Obstacle Warning and Detection) System utilizes a high repetition rate diode laser (PRE = 20 KHz) along with counter-rotating prisms for laser beam deflection with a total field of view of 30 degrees. This system was successfully field tested in 1991. HOWARD can detect one inch wires at ranges up to 200 meters. We are presently in the process of developing a flyable compact lidar system capable of detection ranges in the order of 400 meters.


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    Titel :

    Cable Detection Lidar System for Helicopters


    Beteiligte:
    B. Grossmann (Autor:in) / A. Capbern (Autor:in) / M. Defour (Autor:in) / R. Fertala (Autor:in)

    Erscheinungsdatum :

    1992


    Format / Umfang :

    4 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    A cable detection lidar system for helicopters

    Grossmann, Benoist / Capbern, Alain / Defour, Martin et al. | NTRS | 1992


    Helicopters and aeroplane-helicopters

    Lame´ / M. | Engineering Index Backfile | 1921


    Obstacle Detection for Helicopters

    Millon, G. / Labeaute, P. / D'Orso, M. et al. | British Library Conference Proceedings | 1997


    Helicopters

    Online Contents | 2007


    Helicopters

    Case, John | Engineering Index Backfile | 1922