The application of radio frequency identification technology RFID in the storage field
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The technological advancement of radio frequency products has unparalleled advantages in the field of warehousing, so radio frequency identification technology RFID (English full name RADIO FREQUENCY IDENTIFICATION) has been rapidly spread and promoted in the fields of business, data circulation, and production enterprises.
Radio frequency identification technology is to read and write recording media under the effect of electromagnetic field through radio and communication skills. The identification interval can reach 1.2 meters, and it has a much larger data storage capacity than barcodes, up to 16Kbit. At the same time, it has extremely high confidentiality. When in use, it will not be affected by pollution, humidity, light concealment, position and orientation, and it has strong adaptability. Radio frequency identification skills have been widely used abroad, especially in occasions where data content needs frequently change and tracking information is used more and more widely, such as: large commercial distribution centers, warehouse management, highway toll systems, electronic public transportation tickets, etc. Good economic benefits.
The radio frequency identification system consists of two main parts: electronic tags and readers, as shown below:
data transmission
Radio Frequency Identification Reader Antenna Control Timing Antenna Electronic Tag
Computer control system power supply
1. Electronic label:
Fixed on the object to be identified, it is divided into automatic electronic tags and passive electronic tags. The automatic type has its own power supply, which has high operating reliability and long signal transmission interval. Passive electronic tags have no power source themselves and are in a passive scale condition outside of the operating scale. As long as they enter the operating area, the electronic tags are active, and their response interval is significantly lower than that of active electronic tags. Passive electronic tags are generally made into a card method, while active electronic tags are mostly made into discs and strips. Use readable and writable electronic tags. In addition to the features of read-only electronic tags, a piece of erasable read-only memory (EEPROM) is installed inside, and the electronic tags can be corrected for information if the conditions are met and agreed. And make up, and the electronic label itself has the function of “mobile database”.
2. Reader:
It is composed of two parts, namely the control part and the launching and receiving part. The composition structure is as follows:
Computer control system control unit antenna transmitting and receiving port antenna
The effect of launching the receiving part is:
(1) Provide energy to the electronic tag to start the electronic tag operation.
(2) Modulate the information signal to be transmitted in order to transmit the data to the electronic tag.
(3) Receive the signal reflected from the electronic tag, demodulate it and send it to the manipulator. The signal is transmitted and received through the antenna, so there are strict requirements on the shape and placement of the antenna.
The effect of the control part is:
(1) After transmitting and receiving signals, in order to harmonize the operation of the entire system.
(2) Perform error check on the received data. Multiple types of check methods (such as parity check, cyclic redundancy check, etc.) can be selected.
(3) Establish a control and data channel with the computer control system.
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