Radio Frequency Identification), commonly known as "electronic tag", is a non-contact automatic identification technology, which automatically recognizes the target object and obtains related data through radio frequency signals. The identification work does not require human intervention. As a wireless version of the barcode, RFID technology has a barcode It does not have the advantages of waterproof, antimagnetic, high temperature resistance, long service life, long reading distance, encryption of data on the label, larger storage data capacity, and free change of stored information. Its application will bring to retail, logistics and other industries Revolutionary change.RFID basic composition Radio frequency tags are physically composed of three parts: tags, antennas, and readers. Tag: It is composed of coupling components and chips. Each tag has a unique electronic code. The high-capacity electronic tag has a user writing area and is attached to the object to identify the target object; Reader: A device that reads (and sometimes writes) tag information, which can be designed as a handheld or fixed t
Antenna: Transmit radio frequency signals between the tag and the reader.
The antenna in the tag and ID chip packaged electronic tag antenna, reader and handheld terminal
Data storage: Compared with traditional forms of tags, the capacity is larger (1bit-1024bit), and the data can be updated at any time and can be read and written;Reading and writing speed: Compared with bar codes, there is no need to scan in a straight line, the reading and writing speed is faster, and it can recognize multiple targets and motion;
Easy to use: small size, easy to package, can be embedded in the product;
Security: dedicated chip, unique serial number, difficult to copy;
Durable: no mechanical failure, long life, and resistance to harsh environments.
RFID working principle The basic working principle of RFID technology is not complicated: the reader sends a radio frequency signal of a specific frequency through the transmitting antenna, and when the electronic tag enters the effective working area, an induced current is generated to obtain energy, the electronic tag is activated, and the electronic tag encodes itself The information is sent out through the built-in radio frequency antenna; the receiving antenna of the reader receives the modulated signal sent from the tag, and it is transmitted to the reader signal processing module through the antenna adjuster. After demodulation and decoding, the effective information is sent to the background host system for processing
Related processing: The host system recognizes the identity of the tag according to logical operations, makes corresponding processing and control for different settings, and finally sends out instruction signals to control the reader to complete the corresponding read and write operations.
RFID classification According to the power supply, it can be divided into Passive and Active:
Passive Tag (Passive): The Passive sensor itself has no power source. Its power source comes from the Reader. The reader emits a frequency to make the sensor generate energy and transmit the data back to the Reader. The volume is lighter, thinner, shorter and has a relatively long service life, and the sensing distance is shorter. Active Tag (active):
The price is higher. Because of the built-in battery, it is larger than the Passive tag, has a useful life, and a longer sensing distance. According to the frequency, it can be roughly divided into three categories: LF, HF, and UF: Low Frequency (Low Frequency): 100~500KHz The sensing distance of low frequency is shorter and the reading speed is slower, mainly 125KHz, with good penetration ability; High Frequency: The sensing distance of 10~15MHz high frequency is slightly longer, and the reading speed is also faster at lower frequencies, mainly 13.56MHz; Ultra High Frequency/Microwave: Between 850~950MHz (UHF) and 2.45GHz, the sensing distance is the longest, the speed is the fastest, and the penetration is poor. RFID application As a data carrier, electronic tags can play the role of identification, item tracking, and information collection. In foreign countries, electronic tags have been applied in a wide range of fields.
The RFID system consisting of electronic tags, readers, antennas and application software is directly connected to the corresponding management information system. Every item can be tracked accurately. This comprehensive information management system can bring many benefits to customers, including real-time data collection, secure data access channels, and all product information available offline. Wait. In foreign countries, RFID technology has been widely used in many fields such as industrial automation and commercial automation.
Product anti-counterfeiting and anti-channeling Valuables management
Access control/identification Material/product tracking Personnel and item positioning Transportation and distribution Airline baggage tracking Electronic traceability, food traceability Production line management Railway Transportation
Management System Warehouse management, intelligent warehouse management Electronic article surveillance (EAS), export management of clothing retail stores Anti-theft management, unauthorized use management or asset management of valuable equipment Management of vehicles, parking lots and gas stations, warehouse facilities
Automatic collection of tolls for crossing
Access control management for important and dangerous occasions
Meeting and timing-typical applications
Animal management, personalized feeding
Automatic recognition of CNC machine tools
Product Quantity and Process Control in Flexible Manufacturing System Surveillance of suspects
Vehicle anti-theft system and automobile ignition system
Smart library, rental product management
Application management of car anti-theft and keyless door opening system