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    • 3. 发明专利
    • REMOTE AUTOMATIC METERING SYSTEM
    • JPH02311097A
    • 1990-12-26
    • JP13313689
    • 1989-05-26
    • NEC CORP
    • MATSUSHITA YUJI
    • G08C15/00G08C15/02H04Q9/00
    • PURPOSE:To simplify wiring and to miniaturize a terminal equipment by sending plural frequency signals set different from each other for a prescribed time for each of unit quantity measurement. CONSTITUTION:Meter main bodies 31-1 to 31-n always monitor whether meter sensors 30-1 to 30-n measure unit quantity or not and output plural signals to a transmission terminal equipment 20 in response to the number of meter main bodies. The signal from the main bodies 31-1 to 31-n is detected and a metering processing section 22 discriminates the meter main bodies to count up a relevant counter of a storage section 23 and the other meter main body sends plural signals in response to the meter number, discriminates the number and the relevant count value of the storage section 23 is counted up. A metering command from the center equipment 10 is demodulated by a MODEM section 21 and the processing section 22 decides the stored count value to be its own station metering command and designated count is read from the storage section 23, combined into a reply signal by the processing section 22, modulated and sent to the equipment 10. Thus, each meter is mulit-drop connection to a signal line from a terminal equipment to simplify the wiring and to miniaturize the terminal equipment small.