Power line data transmission system

Abstract

Abstract PURPOSE:To increase the reliability, by providing a circuit selecting channels without any synchronizing noise. CONSTITUTION:Channel pulses obtained by dividing one cycle of the power supply frequency by a factor of n by from a channel pulse generator 1 is generated at output terminals T0-Tn. The number of noises of each channel is counted based on the output of a noise detector 4 and each channel pulse through counters 7-0-7-n. The content of counters is judged by a numeral comparison selector 9 and a channel with least noise number is selected, and the number of this channel is stored for a fixed time with a latch 10. At transmission, a changeover switch 3 is switched to 3B side and channel pulses picked up by a multiplexer 11 and transmission data are applied to an AND gate 12 based on the channel nember stored. The output of the AND gate 12 is applied to a data transmitter and transmitted to a power line 2.

Inventors

• 👤 Katsuyuki Machino
• 👤 Tsuguhiko Tanaka
• 👤 Masahiro Ise
• 👤 Takaaki Okamoto
• 👤 Chuji Suzuki

Bibliographic Details