RFID technology makes unattended weighing management intelligent,NFC metal

　　RFID technology makes unattended weighing management intelligent

　　RFID technology is widely used, and the unattended weighing industry has also been well explained. Intelligent weighing management system has become an important technology for realizing information management in various weighing industries such as coal mines, garbage dumps, petroleum industry, and non-ferrous metal mines. RFID technology can not be copied, strong anti-interference, fast identification, intelligent identification provides an intelligent and information management solution for these industries, and realizes a new weighing intelligent management mode that is efficient, accurate, fast, and anti-cheating. . RFID technology makes unattended weighing management intelligent.

　　In order to realize the automatic identification and information management of vehicle RFID, improve the traffic efficiency and safety of vehicles, and count vehicle entry and exit data, it is convenient for managers to schedule, so as to reduce the labor intensity of managers and effectively prevent charging loopholes. The intelligent weighing management system adopts the long-distance RFID technology to realize the automatic identification function of the weighing vehicle on the original weighing management system, and merges the automatically collected weighing vehicle information into the weighing management system. The intelligent weighing management system can increase the passing speed of the vehicle by 3-4 times at the metering office. Through the automatic identification and accurate measurement of the vehicle number, it can effectively prevent the economic loss caused by human fraud to the enterprise. After the implementation of the system, the labor intensity of the staff and the error rate of manual weighing have been greatly reduced, the transparency of the management process has been improved, and the informatization process of the enterprise has been promoted.

　　A complete set of RFID management system is composed of three parts: reader (Reader), electronic tag (TAG) and application software system. Its working principle is that Reader transmits radio wave energy of a specific frequency to the Tag for Drive the Tag circuit to send out the internal data. At this time, the Reader will receive the interpretation data in sequence and send it to the application program for corresponding processing.

　　There are roughly two categories of products derived from RFID technology: passive RFID products and active RFID products.

　　1. Passive RFID Products

　　Passive RFID products have the earliest development and are also the most mature and widely used products in the market. For example, bus cards, canteen meal cards, hotel access cards, second-generation ID cards, parking cards, etc., can be seen everywhere in our daily life. The main operating frequencies of its products are low frequency 125KHZ, high frequency 13.56MHZ, and ultra-high frequency 915MHZ.

　　The low frequency 125KHZ, commonly known as the frequency band of the ID card, generally requires a reading distance of 5-8CM. This frequency band has a wide range of applications, such as canteen meal cards, membership cards, and access control cards. Due to its low cost and simple application, it is very popular in some application system software involving RFID. In addition, low-frequency 134Khz injectable labels are also very common in animal management applications such as cats and dogs.

　　High frequency 13.56MHZ, commonly known as the frequency band of IC cards, the reading distance is generally required to be 5-8CM. At present, the second-generation ID card used in our country uses the frequency band of 13.56Mhz, and the protocol is 14443B. This frequency band is especially widely used in bus cards and library borrowing cards.

　　UHF 915MHZ, this frequency band is more broadly 860-960Mhz in RFID, and the frequency bands used by several major countries and regions are different, such as 902-928Mhz for the American standard and 860-868Mhz for the European standard, which are used in our country. is 920-925Mhz. At present, the American Standard is mainly used in the application, and the center frequency is 915Mhz, so it is collectively referred to as 915. This frequency band is divided into two main protocols, ISO 18000-6B and 6C, of which 6B is the old protocol and 6C is the new protocol. The reading distance is generally 0-30 meters, depending on the power of the read-write module, the antenna gain, and the size of the tag. UHF 915M has these advantages: non-contact reading distance (0-30M), multi-tag anti-collision reading, fast recognition speed, can recognize high-speed moving objects, long life, intelligent control, high reliability and other advantages characteristics, which are now more and more widely used in Internet of Things applications

　　2. Active RFID Products

　　Active RFID products have developed slowly in recent years. It has major applications in the field of long-distance automatic identification, such as smart prisons, home-school links and other fields. Active RFID has sprung up in this field and belongs to the long-distance automatic identification category. The main operating frequencies of the products are UHF 433MHZ, microwave 2.45GHZ and 5.8GMHZ.

　　At present, the RFID used in our unattended weighing system are passive RFID products, and the operating frequency is UHF 900-960MHZ. With the non-contact inductive card swiping technology, it can be unattended. When the car is parked on the scale platform, the weighing software automatically collects the vehicle information through the RFID device. After the weighing software judges that the weighing data is stable, it takes a snapshot of the photo and saves the gross weight or tare weight. , you can use a camera to capture the photo of the driver when he swipes the card, then print the document, the vehicle is released, and then the next car is started. When a car has been tareed for the second time, the software will automatically call out the collected vehicle information. After the software judges that the vehicle is stable, it will start to take pictures of the tare weight, save the weight at the same time, and then combine it with the data of the first gross weight. Record, calculate the net weight, and then print the document. In this way, the gross weight, tare weight, and net weight data of the car and the photos when saving the gross weight and tare weight, as well as the driver's card number, are in a one-to-one correspondence with the vehicle number in the computer. Therefore, RFID unattended weighing systems are widely used in power plants, coal mines, non-ferrous metal mines, garbage dumps, cargo terminals and other units.

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