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The document inspection solution we selected is currently the most advanced RFID solution in intelligent application systems. The so-called RFID refers to the application of non-contact smart cards (including electronic tags). This has become a very hot topic at present, and many high-tech companies are Speed up the development of dedicated software and hardware, these companies include Intel, Microsoft, Oracle, SAP and SUN, and recently the world’s largest retailer Wal-Mart’s “required its top 100 suppliers to send to their distribution centers by January 2005 The RFID technology is used for pallets and packaging boxes. The decision to use this technology in a single product before 2006 put RFID in the spotlight again. RFID radio frequency identification technology has developed rapidly abroad and has been widely used in many fields, and specific applications are still emerging in endlessly.
1. Technical introduction
Radio Frequency Identification Technology (RFID)
Radio Frequency Identification (RFID) is the specific application and development of automatic identification technology in radio technology. This technology uses some advanced technical means to realize people’s automatic recognition and management of various objects or equipment (persons, articles) in different states (moving, stationary or harsh environments). Due to the maturity of large-scale integrated circuit technology, the size of the radio frequency identification system has been reduced and the cost has been reduced, making the radio frequency identification technology enter the practical stage and become a mature automatic identification technology. At present, the most widely used storage, freight and inspection management system .
Radio frequency identification technology uses radio frequency for non-contact two-way communication to achieve identification and exchange data. It is different from the same or early contact recognition technology. The RFID system’s radio frequency card (including electronic tags) and the reader can be identified without contact, so it can be used in a wider range of occasions. A typical radio frequency identification system includes two parts: radio frequency tags and readers. The radio frequency card (tag) is a chip that integrates several main modules to complete the communication with the reader. There is an EEPROM on the chip to store the identification code or other data. The chip peripheral only needs to be connected with an antenna and a battery, which can be used as an identification card for personnel or an identification card for goods. The chip can read and write information. Compared with bar code, magnetic card, IC card and other similar or early identification technologies, radio frequency cards have the advantages of non-contact, long working distance, suitable for harsh environments, and identification of moving targets (see Table 1). An electronic tag is a type of radio frequency card, composed of an electronic chip and a soft antenna, and can be as thin as paper. At present, the application of electronic tags has become a mature technology. Generally, the information in electronic tags can be read and written.
After the reader receives the card data, it decodes and performs error checking to determine the validity of the data, and then transmits the data to the computer network through wired or wireless means. A simple RFID product is a non-contact IC card, while a complex RFID product can be connected to an external sensor to measure and record different parameters, and it can even be connected to a GPS system to track objects.
Table 1: Performance comparison between radio frequency card and barcode, magnetic card and IC card
| Information carrier | Amount of information | Literacy | Reading method | Confidentiality | Intelligent | Anti-interference ability | life | cost | |
| Bar code | Paper, plastic film, Metal surface |
small | Read only | CCD or laser beam scanning | Difference | none | Difference | Shorter | lowest |
| Magnetic card | Magnetic substance | generally | Read/write | Electromagnetic conversion | generally | none | Poor | short | Low |
| IC card | EEPROM | Big | Read/write | Electrodelete, write | most | have | very good | long | Higher |
| RFID card | EEPROM | Big | Read/write | Wireless communication | most | have | very good | longest | Lower |
2. Application benefit analysis
Taking the logistics industry application as an example, the RFID application has greatly improved efficiency and effectively realized intelligent warehouse management. The relevant statistics are as follows:
(1) Increase in income
Increase inventory availability by 5% to 10%
Due to the increase in inventory availability, sales will increase by 3% to 7%
Increase customer retention by 0.3% to 0.5%
Increased recovery rate in logistics management will increase profits by 25% to 40%
Improvements in recycling management will increase total revenue by 1% to 2%
(2) Cost reduction
Reduce losses due to theft by 40% to 50%
Delivery speed increased by 10%
Reduction of labor costs:
30% reduction in site management
Reduce the labor cost of item storage up to 65%
Reduce inventory costs by up to 25%
Can reduce cycle calculation cost up to 25%
Increase the throughput of warehouse products up to 20%
Reduce damage rate and write-off of expired goods up to 20%
The cost of reducing erroneous data can reach US$100 million
Reduce complaints caused by lost packages up to 98%
The rapid development of the wireless identification industry will become the third revolution of the information industry after the personal computer (PC) and the Internet (INTERNET). The number one international supermarket chain Wal-Mart (Wal-Mart) announced the purchase of 175 billion US dollars of radio frequency identification technology facilities, requiring its 100 top suppliers to start in 2005, and the other 27,400 suppliers to start in 2007. Attach a radio frequency identification label. The U.S. Department of Defense purchases 24 billion U.S. dollars of such facilities each year and requires its 43,000 suppliers to install electronic tags on products worth more than $5,000 from 2005. The U.S. Food and Drug Administration requires that all individual drugs be equipped with electronic tags in 2007. This is just the beginning. All walks of life will take the road of radio frequency identification, and radio frequency identification technology has broad application prospects.
3. Introduction to the system scheme:
We can consider the application of common special inspection items from the following two aspects:
Through the establishment of a system database, the list of approved systems or corresponding data is stored in a professional handheld device (inspector), which can be used to conduct special qualification inspections in real time.
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Schematic diagram of the audit system process
4. Application products and product solutions:
1. Technical introduction of inspection machine (special hand-held machine):
The inspector (special handset) is a highly integrated non-contact IC card reader/writer device located in the 13.56 read/write frequency band. This reader/writer utilizes the prominent modem concept and highly integrates everything that can be achieved at 13.56 MHz. Source communication method and protocol.
The receiving part of the inspection machine (special hand-held machine) provides a solid and effective demodulation and decoding circuit system, which can accept signals from a compatible ISO14443 transponder, and the digital part controls the complete ISO14443 standard framework and error checking (parity). And cyclic redundancy check). In addition, it also supports the fast encryption algorithm of Mifare series chips in order to confirm the product type as soon as possible (such as Mifare standard, Mifare light series, etc.).
Similarly, the inspection machine (special handset) also supports reading and writing all chips that meet the ISO 15693 standard. The current ISO 15693 standard chips have been widely used in electronic tags in RFID products.
Based on the concept of scalability, we choose this type of inspection machine (special handset) to support our reading and writing products. In the system application, our professional reading and writing equipment can work normally in our existing electronic label application system that meets the ISO 15693 standard, and will not affect future system upgrades or expansions. At that time, only the system application software needs to be updated or expanded. , No need to replace any hardware to complete the system upgrade. Whether the system considers adding Mifare 1 cards, or adding Mifare light series cards or electronic tags, our professional reading and writing equipment is fully competent.
2. ISO15693 standard series of electronic tags
The ISO15693 series of electronic label production has become mature and has become the first choice for the international electronic label application system. In the application of document inspection projects, electronic labels can be pasted on designated locations according to customer application requirements. Moreover, the biggest application feature of the electronic tag is its high anti-counterfeiting performance-tamper-evident. Once the tag is peeled off from the designated part with external force, it will cause destructive damage, thereby preventing the electronic tag from being used illegally.
The storage capacity of the ISO15693 standard chip is generally from 1k-2k bits, and the frequency is commonly used 13.56MHz. Because of the maturity of its products, the production and processing technology can reach stable production, so the cost of electronic tags is relatively stable, and the number is relatively ordinary. The price can be controlled and is gradually decreasing. Read-write terminals also have mature products, and desktop read-write terminals and handheld read-write terminals are widely used.
3. Non-contact smart card Mifare 1 card series
The Mifare 1 series of contactless cards is a very mature smart card project application. It can be said that, so far, Mifare 1 should be the most used smart card product in the world. It meets the ISO14443 A standard, and the chip storage capacity is 1k bytes. The relatively large capacity can meet the needs of customers for storing more data. In the document inspection project, it can be selected in the plan that requires a large capacity, is carried with you, and does not require special sticking.
Because of its characteristics, Mifare 1 is generally used as a radio frequency card product, which is processed into a non-contact PVC card. Coupled with its capacity characteristics, the price of Mifare 1 card is slightly higher than that of current electronic tags, but it is also a moderately priced smart card product with a very stable price. In addition, it is the same as the reading and writing equipment of ISO 15693 electronic tags. The Mifare 1 read-write terminal also has mature products, moderate prices and easy to use.
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