Electronic distancing alert system and a process for generating phase synchronism

An electronic distancing alert system comprising:

• (i) a transmitting unit (10) positioned on a first body and comprising an encoder (13) associated with a signal modulating and transmitting circuit (14);
• and
• (ii) a receiving unit (20) positioned on a second body and comprising a signal receiving and demodulating circuit (24) associated with a decoder (23);
• the encoder (13) and the signal modulating and transmitting circuit (14) generating and transmitting an identifying code associated with a carrier wave, the identifying code being received by the receiving and demodulating circuit (24) and recognized by the decoder (23), which actuates a triggering circuit (27) upon distancing between the first body and the second body and absence of reception of the identifying code, the electronic distancing alert system being characterized in that:
• a) the encoder (13) generates a plurality of identifying codes combinable with a plurality of different generation frequencies, which are transmitted by the transmitting unit (10) and received by the receiving unit (20),
• b) the transmitting unit (10) and the receiving unit (20) being selectively and phase-synchronously switched on by a first control circuit (12) which controls the condition of a PLL transmitter (14) and a second control circuit (24) which controls the condition of a PLL receptor (24) for a transmitting period, and turned inoperable by the first control circuit (12) and the second control circuit (22) during the remaining period,
• c) the receiving unit (20) being turned on prior to the transmitting unit (10) and the turned off after the transmitting unit (10) during the transmitting period, such that, the transmission of the plurality of identifying codes is transmitted by the transmitting unit (10) during the transmitting period.