METHOD AND DEVICE FOR DATA RECEPTION AND TRANSMISSION WITH AID OF OPTICAL SIGNAL Russian patent published in 2002 - IPC

FIELD: optical communications and control systems. SUBSTANCE: proposed method and device may be found useful for optical data transmission systems, combination locks, burglar alarms, and the like. Method includes defining time intervals between digital optical signals to convert digital optical pulse arriving at one of photodetecting devices during data reception into digital electric pulse which is amplified and supplied to processor input; time interval between given and preceding digital electric pulses is determined by means of processor and mentioned time interval is used to determine data received; during data transmission processor generates at its output digital electric pulses whose interval between rise times corresponds to data transmitted; generated digital electric pulses are fed to input of optical radiator signal shaping circuit, and generated digital optical signals are emitted into optical channel; processor of this configuration has lock-on module and lock-on register; during data transmission mentioned time interval between digital optical signals received is found by subtracting content of processor lock-on register corresponding to preceding digital electric pulse from content of this register extracted upon arrival of mentioned digital electric pulse, whereupon data word or type of command received is respectively found from look-up table given in description of invention that contains command or data flag and data word or type of command for each range of time intervals; data word or type of command obtained is respectively determined; during data transmission digital electric start signal is generated across output of processor parallel port by setting logical one or logical zero for the time of chosen pulse width; then digital electric pulses are generated across output of processor parallel port so that mentioned time intervals between rise times of generated digital electric pulses correspond to transmitted data or command contained in mentioned look- up table. Data reception and transmission device has optical radiators, photodetecting device, optical-radiator signal generating circuit, amplifier, processor incorporating built-in timer, lock-on module, and look-up table. Functional components are adequately interconnected. EFFECT: reduced cost of device, enhanced efficiency and reliability of data transmission using two kinds of pulse-position modulation, enlarged variation range of modulation characteristics. 2 cl, 4 dwg, 1 tbl