An improved detector is provided for installation in a roadway surface. The detector finds utility in a highway vehicle detection system for determining vehicle presence, vehicle speed and vehicle length. First and second matched induction coil magnetic sensors are maintained at or near the roadway surface. Each of the sensors has a longitudinal axis aligned normal to the roadway surface. The first and second sensors are separated from one another by a known distance in a direction substantially aligned with a direction of traffic flow. Each of the sensors generate a differential magnetic field signature with respect to time to indicate a passing vehicle's leading and trailing edge magnetic signatures. Vehicle speed is determined by a time-distance relationship using the leading and trailing edge magnetic signatures and the known distance. Vehicle length is determined by a time-speed relationship using the leading and trailing edge magnetic signatures and the determined vehicle speed. A triaxial magnetometer maintained at a location in close proximity to the first and second sensors measures a DC magnetic field. The DC magnetic field has vertical and horizontal magnetic field components with the horizontal components including a component substantially aligned with the direction of traffic flow and a component substantially perpendicular to the direction of traffic flow. The vertical and horizontal components caused by the passing vehicle are used to determine vehicle presence.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Vehicle Presence, Speed and Length Detecting System and Roadway Installed Detector Therefor


    Beteiligte:
    J. F. Scarzello (Autor:in) / D. S. Lenko (Autor:in) / A. C. Feaga (Autor:in)

    Erscheinungsdatum :

    1993


    Format / Umfang :

    16 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    ROADWAY VEHICLE SPEED PLANNING

    ZHAO YANAN / CHENG MING / CHENNUPALLI GIRISH GOKUL et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    ROADWAY VEHICLE SPEED PLANNING

    ZHAO YANAN / CHENG MING / CHENNUPALLI GIRISH GOKUL et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Roadway vehicle speed planning

    ZHAO YANAN / CHENG MING / CHENNUPALLI GIRISH GOKUL et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    A Solid-State Vehicle Detector for Roadway Applications

    Rouse, G. / French, H. / Sasaki, H. et al. | British Library Conference Proceedings | 1995


    A solid-state vehicle detector for roadway applications

    Rouse, G. / French, H. / Sasaki, H. et al. | Tema Archiv | 1995