SAFETY SYSTEMS FOR OBJECTS AND METHODS

A safety system for an object comprising a transmitter that comprises a microcontroller to generate an identification signal having a given frequency and a resonant circuit to amplify said signal. The transmitter is suitable to be placed in the vicinity of the body of a person to capacitively couple said identification signal to it. The safety system also comprises a receiver suitable to be capacitively coupled to said body in order to receive said first identification signal and to recognize based on said identification signal if a user is an authorized user. The safety system comprises means to estimate the actual resonant frequency of said resonant circuit when the circuit is amplifying said signal and the microcontroller is adapted to choose as frequency for the identification signal the closest frequency to the estimated actual resonant circuit it can generate so that the amplification of the identification signal is maximized.