Electric meter prepayment system

Abstract

The invention relates to an electric meter prepayment system, which aims at solving the technical difficulties that loss of the public benefit can be caused by modifying a prepayment device, and adopts the scheme that: the electric meter prepayment system comprises a prepayment device and an electric meter, which are connected with each other through a communication interface, wherein the prepayment device comprises a chassis and a circuit board which is installed inside the chassis, the circuit board comprises a central processor having a memory unit, a card reading interface circuit which is connected with the central processor and an electric meter communication interface circuit as well as a circuit breaker which is connected onto a user electric power wire through a switch circuit. The electric meter prepayment system is characterized in that: a strong magnetic detection module circuit is added in the circuit board structure, the strong magnetic detection module circuit is used for collecting a strong magnetic signal to be transmitted to the input end of the central processor, and the central processor outputs a control signal to the circuit breaker.

Description

technical field [0001] The invention belongs to the field of electrical automation equipment, and in particular relates to an electric meter prepayment system, in particular to an electric meter prepayment system. Background technique [0002] At present, my country's electricity bill settlement is divided into two ways, one is to use electricity first, pay later, and generally settle once a month. Another way is called prepayment, that is, to buy electricity first, then use it, and the power will be automatically cut off after the purchased electricity is used up. In the prepaid settlement method, the plug-in card type is generally used. The user first takes the card to the power bureau to recharge, then inserts it into the user's electric meter, and cuts off the power after the number on the card is exhausted. [0003] In the current power system, there are three ways to steal electricity: one is to destroy the metering circuit; the other is to use the characteristics of ...

AI Technical Summary

Problems solved by technology

[0003] In the current power system, there are three ways to steal electricity: one is to destroy the metering circuit; the other is to use the characteristics of the electric energy meter's poor anti-magnetic interference effect, and use strong magnets or alternating coils to generate interference magnetic fields to reduce the meter measurement. Accuracy, through the theft of electricity; the third is to steal electricity by copying the data of the electricity purchase card

For these stealing behaviors, the protection measures of the existing technology are not well done, and there are loopholes for the stealing behaviors

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