Abstract
The present system in the ration shops is like the shopkeeper sees the ration book of the user and gives the quantity of grocery the user asks for. But there will no be proper regularity in issuing the grocery items to the user. Sometimes even there may be chance that different users take the grocery on same ration cards. To avoid all these, we have designed RFID based ration card.
The significant advantage of all types of RFID systems is the non contact, non-line-of-sight nature of the technology. Tags can be read through a variety of substances such as snow, fog, ice, paint, crusted grime, and other visually and environmentally challenging conditions, where barcodes or other optically read technologies would be useless.
RFID tags are categorized as either active or passive. Active RFID tags are powered by an internal battery and are typically read/write, i.e., tag data can be rewritten and/or modified. An active tag's memory size varies according to application requirements; some systems operate with up to 1MB of memory. Passive RFID tags operate without a separate external power source and obtain operating power generated from the reader. This project uses passive tags. Read-only tags are typically passive and are programmed with a unique set of data (usually 32 to 128 bits) that cannot be modified. The reader has three main functions: energizing, demodulating and decoding. The antenna emits radio signals to activate the tag and to read and write data to it.
Each user will be provided with this RFID based ration card. The card will be written with a unique number. RFID reader will be present at the owner of the ration shop. Whenever the user wishes to buy the grocery from the ration book, he has to show his ration card to the RFID reader. The reader immediately reads the unique number present in the tag and sends this number to the microcontroller.
The microcontroller stores this number and also records the amount of grocery taken on this number. Thus, the same user cannot take the grocery once again in the same month.
BLOCK DIAGRAM
