Patent ID: 9697670
Date: 2017-07-04
CPC Classifications: G01R,G06Q,G07F

Claim:
1. A prepayment-type watt-hour meter comprising: a code recognition unit that recognizes a code image in which information on prepayment of a charge-based amount of electric power that is to be consumed by a load is stored as coded, and that recognizes the information on the prepayment that is stored in the code image; and a control unit that measures an amount of electric power consumption by the load, and that calculates the electric bill for the measured amount of electric power, based on the information on the prepayment that is recognized by the code recognition unit, wherein the code recognition unit determines a validity of the code image, and in a case where the code image is valid, recognizes the information of the prepayment, and in a case where the code image is not valid, outputs a code error mark indicating that the code image is not a valid code, and wherein if the code image is not valid and is not recognized for more than a preset number of times, the code recognition unit disables a recognition function so that the invalid code image is not recognized for a predetermined time.