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Today I will introduce a national invention authorized patent-a multi-card compatible energy meter identification method. The patent was applied by Ningbo Samsung Medical Electric Co., Ltd. and was authorized to be announced on May 11, 2018.
Description of contentThe invention relates to electric energy meter technology, in particular to an electric energy meter identification method compatible with multiple cards.
Background of the inventionWith the development of technology, the design of electric energy meters has become more and more intelligent, and people can prepay by swiping a card, but this method also brings many inconveniences.
The specifications of the energy meters designed by different operators are not the same, and they are different from the types of payment cards that they support. Some need to use IC cards for consumption, and some need to use RF cards to pay. Different energy meters cannot be compatible with each other's payment. Card, which causes the user to continue to use the original payment card once the energy meter of a different manufacturer is replaced. If there is still a lot of electricity bills pre-stored in the original payment card, the user needs to go to the power supply bureau to go through the procedures of card transfer and cancellation. The balance in the card can be taken out, which not only puts a burden on the user and causes user dissatisfaction, but also the card after the cancellation is no longer useful, resulting in waste of resources.
Summary of the inventionIn view of the existing problems, the present invention provides an energy meter identification method compatible with multi-card operation. The energy meter is compatible with different payment cards, allowing consumers to choose a payment card according to their needs, which is convenient for users and saves money. Resources.
The figure is the overall working flow chart of the electric energy meter of the present invention
In order to achieve the above objectives, the technical solution adopted by the present invention is: a multi-card operation compatible energy meter identification method, characterized in that the method includes: A, the energy meter periodically sends a card search instruction; B, the detection port is based on the card search Instruction to enter the first card recognition mode to identify the card; C. If the card is not the first card, go to the second card recognition mode; D. If the card is the first or second card Subsequent operation; E. If the card is not the first type or the second type card, the operation is ended.
The first type of card recognition mode is a time-finding radio frequency card mode, and the second type of card recognition mode is a contact card insertion detection mode. The card search instruction includes a radio frequency card detection instruction and a contact card detection instruction. The instruction is generated by the card search chip in the energy meter according to different card search signals sent by the energy meter. Different card search signals include a power meter sending a card search signal to the card search chip to detect the radio frequency card every T1ms and a card search signal to detect the contact card to the card search chip every T2ms.
The radio frequency card search mode is specific: after the card enters the detection port area, if the detection port can detect the card information according to the detection radio frequency card instruction, it judges that the radio frequency card is successfully detected, locks the radio frequency card, and executes D; , Execute C. The detection contact card insertion mode is specifically: the detection port detects the card information every T2ms according to the detection contact card instruction, and when the card information is detected, the card insertion variable is increased by 1; after n consecutive detections, the card is inserted The variable accumulation result is compared with the set value; if the accumulation result is equal to the set value, it is judged that the contact card is successfully detected, and D is executed; otherwise, E is executed. The card insertion variable adopts octal number, and the initial value is 0000; before detecting the card information, the octal insertion card variable is shifted to the left by one bit. The regular RF card seeking mode also includes anti-card conflict or interference operations before detecting card information. T2 takes 10ms, T1 takes 500ms, and n takes 4. Subsequent operations include judging the legality of the card format after successfully determining the card type, if not, the operation is ended.
Subsequent operations also include that if the card format is legal, the energy meter and the card undergo ESAM authentication, and after the authentication is passed, data interaction and recharge are performed. If the authentication fails, the operation is ended. The legality of the card format includes detecting whether the start code, data checksum, and end code of the file structure in the card are correct, or whether the card is an unissued blank card.
Compared with the prior art, the advantage of the present invention is that the existing energy meter is not compatible with multi-card operation, and the method of the present invention can recognize both RF cards and IC cards. The energy meter sends different frequencies for different types of cards According to the signals of different frequencies, different data reading methods are used to read the corresponding card information, which can realize the operation fusion of a variety of cards, ensure the smooth reception of data by the electric energy meter, and realize the smooth transition of the compatible performance of the electric energy meter; and the method Allowing users to choose cards according to their own needs, while facilitating user operations, also saves resources and reduces waste of invalid cards.
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