RFID system shows a detailed and unique supply chain for each product by providing separate identity and transportation history, thereby to achieve the goal of tracking and tracing.
It can recognize the target automatically and access relevant data through radio frequency signal. The identify work can be done without human intervention and can work in various harsh environment. RFID technology can identify the high-speed moving objects and multiple tags and the reading distance can be up to a few centimeters to several meters. According to the read-write mode, we can imput thousands of bytes of information, at the same time, it has high security. The most basic RFID system consists of three parts:
Made up by coupled device and chip, each tag has a unique electronic code, adhering to the object to identify the target; Reader: an equipment to read (sometimes can also write) tag information, can be designed as hand-held or stationary; Antenna: transmit RF signal between tags and reader. Compared with the now widely-used bar code technology, RFID tag has the advantage of waterproof, anti-magnetic, high temperature resistance, long service lifetime and long reading distance besides that it can work without manual operation.