PROCESS OF OBJECT DETECTION AND IDENTIFICATION Russian patent published in 1999 - IPC

FIELD: location and identification of coordinate points on article, locality. SUBSTANCE: passive radio transponders, each being manufactured on base of solid multitap delay line on surface acoustic waves, are positioned on examined object in accord with chosen law with referencing to coordinate points of examined object. Then pulse radiation emitted by antenna system with narrow radiation pattern is directed into space with object. Binary code number is formed in each radio transponder in advance, responses coming from radio transponders are recorded, object is identified by received responses and its coordinates are determined. Passive radio transponder has one common input interdigital converter of electric signal to acoustic one and several groups of regular systems of output interdigital converters of acoustic signal to electric one which are formed on surface of common acoustic line with mutual displacement in direction of propagation of acoustic wave. Displacement is so set that time delay between re-emitted signals from groups of digits of binary code is equal to interdigital delay. In this case single phase metallized conductors of group of output interdigital converters first with regard to input interdigital converters commutate external and presence of potentially risky loads destabilizing object is judged by change of re-emitted binary code of this group. EFFECT: provision for fast reprogramming of recorded identifying information in mobile or immobile object. 3 dwg