NEW COLLISION AVOIDANCE SYSTEM USING BASEBAND REFLECTOMETRY

This paper describes a guided wave, baseband radar-type sensor for protecting automated rapid transit vehicles traveling in dedicated guideways. The system has been given the acronym CASBAR for Collision avoidance System using Baseband Reflectometry. A baseband pulse signal, 2 nanoseconds wide, is transmitted through a surface waveguide (Goubau line) supported alongside the guideway. Reflections from a passive target located on an adjacent vehicle down the track are processed in a receiver. One output of the receiver controls the brakes which can be applied in dangerous situations. The maximum range of the system is 300 feet and its range and range rate resolutions are 1 foot and 0.5 feet/sec. respectively.

• Supplemental Notes:
  • Conference Proceedings of the European Microwave Conference 8th, Paris, France, September 4-8, 1978.
• Corporate Authors:

  Microwave Exhibition and Publications Limited

  Sevenoaks, Kent,   England 
• Authors:
  • ROSS, G F
  • Cronson, H M
  • Rama Rao, B
• Conference:
  • Conference Proceedings of the European Microwave Conference 8th, Paris, France, September 4-8, 1978.
• Publication Date: 1978

Media Info

• Pagination: p. 594-597

Subject/Index Terms

• TRT Terms: Automated guideway transit; Automatic train protection; Crash avoidance systems; Rayleigh waves; Safety; Transmission lines; Waveguides
• Old TRIS Terms: Surface wave transmission lines
• Subject Areas: Public Transportation; Railroads; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00312440
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Sep 16 1981 12:00AM