| 摘要 |
FIELD: electricity.SUBSTANCE: application: in the field of electrical engineering. The method lies in location of the master unit at the line beginning; a number of slave units is placed along the line and each slave has its serial number (identifier); information transmitted from the master unit is coded by a sequence of symbols from the preset alphabet, at that each symbol corresponds its serial number in the alphabet (symbol code); the obtained sequence of symbols is formed into a package consisting of number fields, in the first number field identifier of a slave unit is written, symbol codes of the transmitted sequence are written in remaining fields; at the beginning of each field supply feed is interrupted (marker of a field beginning), symbol is transmitted to the line by supply of a number of supply feed half-waves, after transmission of the last field supply feed is interrupted (marker of a package ending). Capacitor is connected to power supply line; in each slave unit there's series-connected resistor and controlled switch connected to the power supply line between zero and phase conductors. Information transmitted from a slave unit to the master one is coded by binary bits sequence; while transmitting bit 1 resistor is connected to the power supply line, while transmitting bit 0 resistor is not connected; by means of voltage threshold sensor the master unit defines presence or absence of voltage in the line within range of receipt marker; when voltage is interrupted during transmission of receipt marker it will be considered that a slave unit has transmitted bit 1, otherwise bit 0; then the process is repeated for each bit of binary sequence transmitted from slave units to the master.EFFECT: providing bidirectional information change.2 cl, 3 dwg |
