RFID And Logistics​

RFID And Logistics work, read-write through the transmitting antenna transmits a certain frequency radio frequency signal, attaches the label the target object enters the antenna work area produces the induction current, the electronic label obtains the energy by virtue of the induction current transmits the data information which stores in the chip, or the electronic label takes the initiative to transmit a certain frequency the radio frequency signal, the read-write to the received carrier signal carries on the demodulation and the decoding and then transmits to the data The data management system; The data management system according to the logic operation judges the electronic label's legitimacy, makes the corresponding processing and the control for the different settings.

Project description:

(1) RFID tags

tags, also known as transponders, is the real carrier of the RFID system, by the tag antenna and tag special chip composition. Each tag has a unique electronic code attached to the object target object, used to store the need to identify and transmit information, equivalent to the bar code technology in the bar code symbol.

There are many types of electronic tags, according to the power supply for active electronic tags and passive electronic tags; according to the function of read-only tags, rewritable tags, microprocessor tags and sensor tags; according to the modulation mode for active tags and passive tags, active tags to use their own RF energy to send energy for the read-write read data, passive tags must be used to read-write carrier modulation their own signal to transmit data. The passive tags must use the reader's carrier modulation of their own signals to transmit data.

(2) rfid read-write

read-write is responsible for reading or writing the label information, alone to complete the data read-write, display, processing and joint computer or other systems to complete the operation of the electronic label. The typical read-write contains the control module, the radio frequency module, the interface module and the read-write antenna. In addition some read-write also has RS232, RS458 or the Ethernet interface and so on additional interface, will obtain the data transmission to the application system or receives the data from the application system. Read-write and electronic tag communication follow the command response protocol, read-write correctly receive and decode the electronic tag data, through a series of specific algorithms to determine whether the electronic tag needs to re-send data or stop sending data, through this protocol, read-write in a very short period of time, a very small space to identify a number of tags, and at the same time, effectively prevent the identification of fraud.

(3) The data management system

the data management system completes the data information storage, the management and the RFID electronic label read-write control. The system can be a variety of different sizes of databases or supply chain systems, can also be industry-specific, highly specialized database.

RFID work, read-write through the transmitting antenna transmits a certain frequency of radio frequency signals, attached to the target object of the label into the antenna work area produces inductive current, electronic tags by virtue of the inductive current to obtain the energy to launch the data information stored in the chip, or electronic tags take the initiative to transmit a certain frequency of radio frequency signals, read-write demodulation and decoding of the received carrier signals transmitted to the data management system; data management system according to the logic of the system, the data management system, the data management system, the data management system, the data management system, the data management system, the data management system. The data management system; The data management system according to the logic operation judges the electronic label's legitimacy, makes the corresponding processing and control for the different settings.

The system in the coupling method, the communication flow, the data transmission method (the load modulation, the backward scattering, the high harmonic) and the frequency range and so on, the different frequency RFI D data transmission method has the essential difference, from the read-write and the electronic label between the data communication and the energy sensing method is divided into the inductive coupling and the backward coupling two kinds of, the general low-frequency RFI D adopts the inductive coupling method, the higher frequency adopts the backward scattering coupling method. The way.