Patent RU-2735950-C1 (RU)
Inventor: Vavulo Maksim Igorevich
IPC: H04B3/00
Filed: 2020-06-11
Granted: 2020-11-11
Abstract: FIELD: electrical engineering. 
     SUBSTANCE: according to the method, at the beginning of the alternating current power supply line, a transmitter is arranged, consisting of a microprocessor unit, a zero-point transition moment of the main harmonic of the supply voltage and the controlled switching device, along power supply line accommodating multiple receivers, each of which consists of microcontroller, to which is connected the zero-point transition point of main harmonic of supply voltage, each receiver has its own unique serial number, information is transmitted by sequence of numbers, where each number corresponds to its own number of half-waves of main harmonic of supply voltage, then packets of the established length are formed from the received sequence of numbers, each packet consists of a field of a unique serial number of the receiver and established quantity of numerical fields, the maximum quantity of half-waves for all fields is determined, number of half-waves of the main harmonic of the supply voltage of the transmitted sequence is recorded in each number field, then the packet is transmitted along the power supply line, wherein measuring the shift angle between voltage and current in the power supply line, at the beginning of the packet, performing the first interruption of the supply voltage and current (packet start marker) taking into account the measured shift angle between voltage and current in the power line, then the value of the unique sequence number field of the receiver is transmitted by supplying to the power supply line of the corresponding number of half-waves of the supply voltage, then performing second interruption of supply voltage and current (field separator) taking into account measured shift angle between voltage and current in power supply line, after which value of second field of packet is transmitted by supply to power supply line of corresponding number of half-waves of supply voltage, after which following interruption of supply voltage and current is performed taking into account measured shift angle between voltage and current in power supply line (field separator) and then similarly transmitted all other fields of packet, after the last field separator in the power line the transmission end attribute is transmitted along the power line by transmitting the number of half-waves of the main harmonic of the supply voltage exceeding the maximum number of half-waves for the fields, in each receiver there determined are moments of supply voltage interruptions due to absence of pulses coming from zero crossing moment sensor, using the receiver microprocessor, counting the number of half-waves of the main harmonic of voltage passed between interrupts, then counted in each packet field number of half-waves is assigned a unique serial number and command number and, thus, recovered transmitted packet, if the received unique serial number is not equal to the own unique serial number of the receiver, the packet is ignored, after reception of transfer end attribute, all receivers are put into waiting condition of next packet start marker. 
     EFFECT: high quality of remote reception and transmission of information over alternating-current power lines and reliability of transmitted information. 
     3 cl, 11 dwg