Charge-control processing method of electric power meter for prepayment

Abstract

The invention discloses a charge-control processing method of an electric power meter and relates to the field of charging with the electric power meter. The charge-control processing method includes that firstly, prepaid electricity is inputted into an electricity selling management system; the electricity selling management system magnifies the prepaid electricity to be 10N+1 times and converts the prepaid electricity into a hexadecimal value and magnifies unit price to be 1-N times and converts the unit price into a hexadecimal value; secondly, the converted prepaid electricity and unit price are inputted into the electric power meter storing total electricity and the unit price which are hexadecimal; electricity deduction processing is performed by the electric power meter each time 0.1-degree electric quantity is consumed according to the formula: remaining electricity=remaining electricity before deduction-unit price, and the hexadecimal remaining electricity and unit price are stored in the electric power meter. Multiply operation of decimal floating points in electricity deduction is simplified to be hexadecimal addition and subtraction calculation operation, and burden of the electric power meter is reduced.

Description

technical field [0001] The invention relates to the field of electric energy meter billing, in particular to a charge control processing method for a prepaid electric energy meter. Background technique [0002] The traditional prepaid energy meter uses the form of electricity to deduct the cost of the energy meter. In the specific operation, the user tells the administrator of the power supply party the pre-purchased electricity. After the user pays the fee, the administrator writes the pre-purchased electricity into the card, and then the user inserts the card into the electric energy meter, so that the user's purchased electricity is input into the electric energy meter. Whenever the electricity consumption reaches a certain value, the electric energy meter The electricity will be deducted once. Since the unit price of the electricity bill has many decimal places, the amount that the user needs to pay in advance is often not an integer, so there is a problem of change, wh...

AI Technical Summary

Problems solved by technology

However, since the unit price has decimals, the unit price must be stored in floating point in the energy meter. Whenever the electricity consumption has accumulated to a certain value, it is necessary to multiply the accumulated value of electricity consumption by the unit price, and then deduct the electricity fee. Subtraction, this process involves the multiplication of decimal floating point, which brings a large storage and calculation burden to the single-chip microcomputer in the electric energy meter, especially for the small-capacity and low-cost single-chip microcomputer

In addition, because electricity charges and unit prices are generally displayed and communicated in the form of BCD codes, but the calculation of converting the data recorded in floating point mode into BCD codes is relatively large, which will also cause a burden on the energy meter

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