Electronic label to the monitoring and control of the cold chain and method of control of temperature, which associates

摘要

The tag (1) has a temperature control circuit (3) has a capacitor (7) and a diode (8) connected with each other, where the circuit is connected to a transponder (2). The diode is connected to a terminal (7.1, 7.2) of the capacitor in an inverse manner. The capacitor is charged with a given voltage (VCHARGE) during initialization of the tag so that the voltage is discharged at constant current in the diode during the time. The transponder transmits a signal to a reader (13), where signal is relative to evolution of the voltage observable at the terminal according to time. An independent claim is also included for a method for controlling temperature in which radio frequency identification tag is implemented.