An anti-collision radar system is being developed by Standard Elektrik Lorenz and Daimler-Benz using a 35 ghz frequency band. A frequency-modulated continuous-wave radar sensor was used in preference to ultrasonic or infrared devices because of its better capability for operating in bad weather. The returned radar signal is processed to indicate the speed and acceleration of vehicles in front. Information on own vehicle speed and road conditions are also fed into the microprocessor. Trials have shown that driver indication of safe distance is more useful than a sudden warning. Resolution is 10 M over the maximum range of 130 M within plus or minus 2.5 M. Relative speeds between -30 and +160 km/h can be derived with a resolution of 10 km/h and accuracy of 2.5 km/h. A special program filters out returns from objects such as signposts and guard rails. System response time is less than 0.1 sec, and the driver responds to a warning within 0.8 to 1.0 sec. Paralleled magnetic tape recordings permit review of the immediate history and rejection of spurious data. /TRRL/

  • Availability:
  • Corporate Authors:

    IPC Magazine Limited

    King's Reach Tower, Stamford Street
    London SE1 9LS,   England 
  • Publication Date: 1978-1-12

Media Info

  • Features: Photos;
  • Pagination: p. 90
  • Serial:
    • Volume: 77
    • Issue Number: 1085
    • ISSN: 0262-4079

Subject/Index Terms

Filing Info

  • Accession Number: 00174134
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 29 1978 12:00AM