Location of objects

摘要: A locating system 10 for predetermined labelled objects 20 includes a transceiver unit 12 which comprises narrow beamwidth antenna 14 transmitting an energizing signal 16 at first frequency and receiving returned 22 second from object to be located, the incorporating transponder category code. plurality of label-like transponders 18 is provided, each affixable located. Each logic circuitry in order that group constituting radiates 22, including identification code, time-delayed manner so signals are received serially by 12.