What does card meter mean in watt-hour meter industry?

The card meter is an IC card electric meter.

IC card prepaid watt-hour meter, also known as IC card prepaid watt-hour meter and intelligent watt-hour meter, is an intelligent watt-hour meter that uses IC card as the data transmission medium of electric energy value, and adds functional modules such as load control part into electric energy meter (electronic watt-hour meter or mechanical watt-hour meter) to realize electric energy reading and settlement.

The management electricity sales system includes user information management subsystem, IC card initialization system, statistical analysis subsystem and electronic sales system.

1. According to different chip types, IC cards can be roughly divided into three types: memory card, logic encryption card and CPU card.

2. According to the form of embedded integrated circuit chips, IC cards can be divided into contact cards and contactless cards.

Extended data:

Development history

Before 1 and 1995, the ic cards of 93C46 and 24C0 1 are erasable memory chips (EEPROM) or universal memory cards. IC cards are easy to store, simple to use, low in price, low in security and easy to be cracked, and users are mainly concentrated in property communities.

2. 1995 ~99, mainly calling card IC cards, mainly memory cards (24C0 1) and logic encryption cards (4442, 4428), in which the security of logic encryption cards (4442, 4428) is further improved, and the embedded chip adds control logic outside the storage area, which needs to be checked before accessing the storage area.

Users expanded from simple property communities to power industry management departments, and began to be widely used.

3. 1998 ~ Up to now, it is mainly a financial IC card. The embedded chip of CPU card is equivalent to a special type of single chip microcomputer with CPU card (CPU card and SAM module as encryption media). Besides the controller, memory and timing control logic, it also has the characteristics of large storage capacity, strong processing ability and safe information storage.

Take the lead in the comprehensive promotion in Beijing Power Supply Bureau, and start to promote in Henan, Hunan and other cities.

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