| 摘要 |
System for data transfer between one or more objects moving along a path and one or more fixed communication stations located along said path, wherein each object is provided with a transmitter/receiver combination, the transmitter of which is coupled to an identity code generator and the receiver of which is coupled to a data processing unit, and wherein each communication station is provided with a transmitter/receiver combination, the transmitter of which is coupled to a message generator and the receiver of which is coupled to an identity code recognition unit, wherein the transmitter/receiver of each object is continually activated, at least in the vicinity of the communication station, such that successively, in an alternating series of first and second periods, the transmitter transmits an identity code, originating from the identity code generator, in a first period and the receiver is ready to receive any responses in a second period, wherein, furthermore, the receiver of each station is continually activated until an identity code has been received, which code is recognized by the recognition unit, after which the message generator and the transmitter are activated in order to transmit any message intended for the object having this code. |
