Abstract
In technical high speed development's today, the electrical energy table's development is also developing to the multi-purpose directions. This article in view of the present inhabited area or the dorm electrical energy measurement's present situation, has designed one multiuser duplicate tariff electronic formula electrical energy table. This is in reply to your letter tariff electrical energy table may simultaneously examine many household housing the active electrical energy, after simultaneously measures the various users' accurate electric quantity, realizes the electric quantity long-distance transmission through the power line carrier.
On the hardware, uses power/electrical energy special-purpose IC chip ADE7755 to take the measurement, used the serial mode to expand 10 LED to carry on the system message to demonstrate, used real-time calendar clock electric circuit RS5C372A and the TC74 digit temperature sensor provides the clock and carries on the temperature compensation to its movement precision, used the watch-dog electric circuit supervisory system to move and to sharpen system's antijamming ability.
Carrier communication module PLCi36C uses the wide frequency modulation system, carries on through the low pressure power line carrier the data electric quantity the reliable transmission. On software, not only uses the modular programming thought that has compiled the corresponding procedure, has realized the multiuser electrical energy measurement, the demonstration, the memory, moreover selects the data backup method, enhanced the data storage security, simultaneously has realized the duplicate tariff measurement way through the real-time calendar clock, and has carried on the temperature compensation to the clock movement precision; In carries on the correspondence aspect using the low pressure power line, used the wide frequency modulator approach to realize with communication controller's between data transmission, simultaneously adopted measures and so on password authentication, software trap to enhance system's reliability effectively. The duplicate tariff central electrical energy table has the measuring range to be big, the precision is high, the power loss is low, installment simple and so on merits, may realize uses electricity the measurement, against to steal the electricity, the duplicate tariff, long-distance to copy the table and so on many kinds of functions, has the high society to promote the value.
key word: Duplicate tariff electrical energy table; Long-distance copies the table; Power line carrier; ADE7755; PLCi36C