| 摘要 |
Apparatus and methodology ensure reliable electricity meter data recordation and maintenance during ongoing operation and any power failure. During normal operations, data committed to memory is immediately read to determine write success. Upon detection of any power failure while monitoring operating power, a reset procedure is entered that ensures provision of reliable initialization data upon restart of the metering operation. Power failure detection may be based on decreases in a voltage associated with the meter metrology board or of a storage capacitor, while clearance for normal mode (i.e., after a power failure) depends on both such voltages passing testing for minimum values. Such combined approach provides a hysteresis effect, for less sensitivity to noise and some adverse AC line conditions. So-called dynamic data (energy flow and amount) is collected for storage by monitoring an interface between the metrology components of the meter and a meter register.
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