Driving a motor vehicle is primarily an information-based activity involving the transformation of information into reactions. 90% of the traffic-relevant information required to perform the task of driving is absorbed visually. A distinction is made between direct vision from the vehicle through body openings such as windows, and indirect vision from the vehicle using mirror and electronic vision systems. Indirect vision is used to monitor vehicle surroundings, traffic and the behavior of the own vehicle, regarding its position and orientation within the driving lane. Indirect vision is even more important in a commercial vehicle than in a passenger car, as the driver has to control complex, and difficult to monitor, drawbar or semitrailer-tractor combinations. To design new mirror or electronic vision systems applicable for the driver a static method is not sufficient. Rather, the dynamic interaction between driver and vehicle to fulfill the driving task has to be analyzed. To describe the driving task, explicitly defined driving situations can be used. If driving situations are relevant for vision evaluation and design they are called vision situations. These vision situations in real traffic, for example turning or driving thru a roundabout, are dynamic. The dynamic vision requirements depend on driver, vehicle, driving task, vehicle surroundings and traffic. The design process to improve vision systems, therefore, has to consider dynamic vision situations. Even during one vision situation the vision requirements are not static but vary continuously. Those variations are related to changes in driving direction and speed, and the trailer reacting to those changes. The necessary vision areas at low speed are oriented mainly on the transverse behavior of the tilted trailer. In this case the close vision field in vehicle longitudinal direction is of special interest. At higher speed the trailer usually only exhibits a small tilt angle. Because of this, the variance in transverse direction decreases and the relevant vision areas shift in longitudinal direction to the far vision field. One vision situation can be divided into several vision phases. The vision area variation can be described very well by observing the single vision phases, thus increasing the level of detail. Within one vision phase the necessary field of vision is therefore constant or the variation of the vision requirements can be described by simple correlations, dependent on vehicle parameters. Consecutive vision phases influence each other. Therefore, the phases cannot be observed exclusively. The previous and, if possible the subsequent phase should be taken into consideration.


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    Title :

    Variation of actual fields of indirect vision in commercial vehicles during dynamic vision situations


    Contributors:


    Publication date :

    2013


    Size :

    15 Seiten, 11 Bilder, 30 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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