METHOD FOR CONTROL OF OPTOELECTRONIC LOCK Russian patent published in 1997 - IPC

FIELD: locking devices. SUBSTANCE: optoelectronic lock control method is of following steps: successive coding of key number, transmission of pulse succession over optical channel, recovering of true values of key code order, comparing it with standard and operation of lock in case of coincidence. Introduction of coding of j - order of key code by group of pulses with their number determined by relation (1): at Nj = 1 at Nj = 0; where n - number of pulses in group; Nj - value of j order, m -number of pulses in group corresponding to value of order being transmitted equal to unit. P - number of pulses in group corresponding to value of order being transmitted equal to zero and recovering of key code from j order according to number of received pulses for determined time interval relative to first pulse according to relation (2): . This ensures reduction of number of optical channels down to one with excluding necessity of operating oncoming optical channels. Introduction of canceling for preset time of successive recovery of key code from orders at noncoincidence in j order practically excludes possibility of selecting code, that is ensures high reliability of guarding premises. EFFECT: high efficiency. 9 cl, 15 dwg