What is cool chain? COOL CHAIN is a logistic system that provides a series of facilities for maintaining ideal storage conditions for perishables from the point of origin to the point of consumption in the food supply chain.
Objective Several food temperature levels for many kinds of food The success of implementing cool chain management involves: continual monitoring of product temperature throughout distribution having appropriate corrective action plans in place
The objective of cool chain Reduce costs Improve product integrity
Principle of RFID What is RFID ? R: Raido F: Frequency ID: Identification Radio frequency identification (RFID) is a rapidly growing technology that has the potential to make great economic impacts on many industries. RFID is a low-cost, practical way to identify and keep track of almost anything from wildlife to goods in a warehouse. The technology centers on electronic "tags" which store data and respond to a radio frequency reader device.
RFID TAG An RFID tag is an electronic device about the size of a grain of rice. The tag contains an antenna and a microchip with data storage. RFID READER An RFID reader combines the functions of radio transmitter, receiver and data interface. The transmitter activates the tag, the receiver reads the tag's response and the interface passes information along to a computer or other equipment. A basic RFID system consists of three components An antenna or coil A transceiver (with decoder) A transponder (RF tag)
Category of RFID Passive transponders and RFID tags have no energy source of their own, relying on the energy given off by the reader for the power to respond. An active transponder or tag has an internal power source, which it uses to generate a signal in response to a reader. Passive & Active
Far Field & Near Field Near-Field However, near-field communication has some physical limitations. The range for which we can use magnetic induction approximates to c/2πf, where c is a constant
Far-Field A far-field system’s range is limited by the amount of energy that reaches the tag from the reader and by how sensitive the reader’s radio receiver is to the reflected signal.