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System for data transfer between moving objects and fixed stations

  • US 6,583,732 B1
  • Filed: 12/17/2001
  • Issued: 06/24/2003
  • Est. Priority Date: 02/12/1999
  • Status: Expired due to Term
First Claim
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1. System for effecting data transfer between one or more objects moving along a path and one or more fixed communication stations located along said path, characterised in thateach object is provided with a transmitter that is coupled to an identity code generator, and in that each communication station is provided with a receiver that is coupled to an identity code recognition unit, wherein the transmitter of each object is continually activated, at least in the vicinity of a communication station, such that, in an alternating series of first and second periods, the transmitter successively transmits an identity code, originating from the identity code generator, in a first period and the transmitter transmits nothing in a second period, and wherein the receiver of each station is continually activated until an identity code is received, which code is recognised by the recognition unit.

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