AVI and No Visible Reader

This article describes the use of automatic vehicle identification (AVI) for applications in logistics control and security. The technology for the system, which was developed in the 1960s, was originally used for traffic timing at stop lights. The system uses a loop imbedded in the road surface and a detector module affixed to the vehicles to be detected by the loop through an electromagnetic field that it generates. It is suggested that such AVI loops be used for applications in gates or overhead doors. Since AVI only detect vehicles outfitted with a detector module with the correct frequency within the loop, it is a fairly secure means of vehicle differentiation. The system is also capable of logging and time-stamping all instances of access to provide operators with an additional level of monitoring.


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Filing Info

  • Accession Number: 01050343
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: May 9 2007 5:24PM