FIELD: physics.
SUBSTANCE: antenna loop or electric power supply loop of radio frequency mark includes an element (photosensitive element, switch) whose electrical parametre depends on the value of an ambient parametre (temperature, humidity, illumination), which can be detected by a sensor. As a result, the level of the response signal of the radio frequency mark is defined by the value of the ambient parametre. In another version, the level of the response signal of the RFID mark varies when part of the sensor, which varies its dimensions with variation of the ambient parametre, approaches the standard RFID mark. When the sensor approaches, the mark breaks down or characteristics of its antenna change.
EFFECT: use of the sensor enables to determine the state of the sensor using a wireless radio frequency technique without storing the state of the sensor in the memory of a radio frequency microcircuit.
15 cl, 4 dwg
