OIL SUPPLY DATA TRANSMISSION SYSTEM

摘要

PURPOSE:To eliminate the need for the provision of an exclusive transmission line at each oil measuring instrument by using a lighting line or a power line for the transmission of oil feeding data. CONSTITUTION:The 1st block filters 9-4-9-5 show high impedance to power carrier frequencies of power line carrier transmitters 7-4-7-5 and of line carrier receivers 12-4-12-5 and a lighting line block filter 8 prevents a carrier signal of power line carrier transmitters 6-1-6-3 from being leaked to a lighting power source 2. Thus, the oil feeding data sent from oil measuring instrument 4-1-4-5 are sent to the carrier transmitters 6-1-6-3 and 7-4-7-5, each carrier signal is transmitted via a power line and a lighting line 2-1', received by carrier receivers 11-1-11-3 and 12-4-12-5 and read by an oil measuring device 3 as the oil feeding data.