SWIVELING OF HIGH BEAM HEADLIGHTS

SK SVEPANDE MOTESLJUS TAKBARA EFFEK TER AV SVEPLJUSSYSTEMET SAMT FORSLAG TILL PROVNING

This analysis deals with a vehicle head-light system which is based on other principles than the conventional high and low bean system. The system is intended to reduce disability glare in car meeting situations by a mobile high beam, sweeping a sector of approximately 15 deg ahead the car. The beam is narrow (3 deg) with a sweeping velocity of 25 deg per second. This will give an exposure and glare duration of approximately 0,12 s with the intention to maximize the detection and identification distances and minimize the disability discomfort glare. The purpose of this analysis is to identify critical aspects of the sweeping high beam system in relation to the conventional low beam system and to give an outline of an evaluation program of the system. The following aspects are discussed: (1) detection distances, (2) analysis and identification processes, (3) illusions due to the flicker and fusion qualities of the system, (4) speed adaptation in meeting situations, (5) scanning behavior, (6) optical guidance, (7) judgements of the position and velocity of the oncoming car, and (8) discomfort glare. The conclusions are that several of those aspects can be assumed to be crtical to the sweeping high beam system. An evaluation program is predicted to be rather costly and must be proceded by thorough pilot studies in order to solve methodological problems and overview of the extent of an full evaluation program. Such a pilot evaluation program is proposed in this paper. Finally, the judgement concerning the ambitions and resources spent on the sweeping high beam system must be considered in relation to the polarized head light system.

  • Corporate Authors:

    Swedish National Road and Traffic Research Institute

    Drottning Kristinas Vaeg 25
    S-11428 Stockholm,   Sweden 
  • Authors:
    • SPOLANDER, K
  • Publication Date: 1973

Language

  • Swedish

Media Info

  • Features: References; Tables;
  • Pagination: 51 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097049
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: Report 123
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM