RFID, say NO to the problem vaccine

Some time ago by the vaccine incident, in fact, to ensure the quality of the vaccine there is an important factor: to ensure the normal operation of the cold chain.

Cold chain refers to the storage, transportation and refrigeration facilities and equipment for ensuring the quality of vaccines in the process of operation from vaccine manufacturers to vaccination units. Cold chain equipment and facilities include cold chain trucks, vaccine transport tools, refrigerators, refrigerators, vaccine refrigeration boxes, vaccine refrigeration bags, ice arrangement and housing equipment.

The transport and storage of vaccines have temperature requirements, according to experts, in addition to poliomyelitis live attenuated vaccine requirements at - 20 degrees Celsius light preservation, transportation process can be carried out under refrigerated conditions, other vaccines are required to be 2 ~8 degrees Celsius light preservation and transportation. RFID technology originated in the United Kingdom, used in World War II to identify enemy or our aircraft identity, began commercial use in the 1960s. The U.S.Department of Defense requires all military supplies to use RFID tags after January 1, 2005, and the Food and Drug Administration (FDA) recommends that pharmaceutical companies use RFID to track counterfeit drugs from 2006. In 2010, 3% of European Union companies applied RFID technology, which was distributed in identity documents and access control, supply chain and inventory tracking, car charges, theft prevention, production control, asset management and so on. It can be seen that in foreign developed countries, the use of RFID technology has become a trend.

acc RFID标签可以分为三个类别ording to their energy acquisition methods: the first is passive tags, tags enter the magnetic field, receive the radio frequency signals emitted by the card reader, and transmit the product information stored in the chip by the energy obtained from the inductive current. Such tags usually have digital identification and a limited number of storage units. The second category is the semi-active tag. The RF circuit of this kind of tag also uses induced current to provide energy. The other part of the circuit relies on the built-in battery to provide energy, so it belongs to the passive tag. The third category is the active tag. The built-in battery of this kind of tag provides energy for the whole circuit. The latter two types of tags have other key information besides digital identification, such as temperature information, and the storage capacity of this information is relatively large.

RFID temperature tag is a kind of tag which combines digital identification with temperature measurement. It can identify the material by digital identification and measure and record its environment.

RFID as a new automatic non-contact identification technology has been rapidly developed at home and abroad [1], the introduction of RFID technology into the field of logistics applications has become a hot spot. This paper designs and develops a tobacco logistics sorting system based on RFID technology, which realizes the automatic sorting of tobacco products; puts forward a logistics tracking management system based on RFID according to the demand analysis of the logistics tracking system of automobile manufacturing enterprises; and a series of applications, such as RFID, which only uses RFID as a label to identify products. As for the modern cold chain transportation industry, we should not only care about the label of its products, but also the relevant temperature value. Temperature tag can meet the requirements of cold chain transportation temperature monitoring becau

2.1 semi active RFID temperature tag for retroactive tracing

Semi-active temperature tags provide energy for temperature acquisition and storage through built-in batteries, and can independently complete temperature acquisition and storage. When entering the effective identification range of the card reader, the energy is obtained by the excitation of the card reader to complete data exchange. This temperature tag has very low consumption current.

There are two main types of semi-active temperature labels: the high frequency temperature label "as shown in Figure 2" which conforms to ISO / IEC 15693 standard and the ultra-high frequency temperature label which conforms to ISO / IEC 18000 standard. The main difference between the two is the penetration and recognition distance. The high frequency temperature label has a strong penetration and can be used in a wide range. It can also be used in the transportation of liquid goods (such as blood products) and solid goods (such as frozen food). The disadvantage is that the recognition distance is relatively short, even with the aid of high-power reading. The effective recognition distance of the card is usually within 1 meter. For UHF tags, the recognition distance is greatly increased, but its penetration is weaker than that of high frequency tags.

半有源温度标签的使用过程s as follows: when the product is out of storage, according to the needs of cargo transportation, the temperature label is set the start-up time and collection interval period of the temperature label, and the temperature label is put into the cargo container for delivery to the cargo carrier; when the cargo is out of storage, the temperature label will reach the specified time after the cargo is out of storage. Automatically start the temperature recording function to record the ambient temperature value uninterruptedly in the preset acquisition period; read the information and temperature of the RFID tag of the container through the handheld terminal during the transit of the goods to ensure the validity of the goods; in the storage of the products, the handheld terminal or the high-power fixed card reader can use the RFID tag according to the RFID tag. The information is convenient, fast and accurate to sort the goods and verify whether the temperature of the goods conforms to their storage temperature, and reject the unqualified products directly. When the goods satisfying the storage temperature requirements are put into storage, the temperature data will be imported into the database synchronously. The whole process of logistics realizes the temperature record and ensures the product quality.

2.2 an active RFID temperature tag that can be used for real-time collection of large quantities of goods.

Semi-active temperature tag has the function of temperature recording, similar to black box, which is mainly used to identify afterwards responsibility. For real-time temperature alarm during transportation, active temperature tag can be used. Active temperature labels can measure the ambient temperature in real time and send the data to the receiving device actively. Therefore, they can respond quickly to abnormal conditions to remind drivers to take measures to avoid losses. Reader can read a large number of real-time temperature labels at the same time, realize the function of data recording through the built-in SD card reader, realize the real-time temperature alarm by GSM module, in addition, the receiver itself has the gateway function can also realize remote monitoring, through the networking function will be directly stored in the data center. The terminal customer can also view the product temperature information through the Web page in time. The active temperature label must be used with the reading equipment. Therefore, it is limited to the temperature monitoring of the carriage cargo in the cold chain transportation process to realize the real-time monitoring of the cargo temperature.

There are four main operating bands of the active temperature tag: 433 MHz, 915 MHz, 2.4 GHz and 5.8 GHz. There is no obvious difference between the four bands, only 433 bands in penetration slightly better, the most important is the cost difference. Because the active temperature tag is an active transmission data, in addition to power consumption and effective identification distance, the anti-collision ability of the data and the maximum number of identification tags are also important performance indicators.

3. conclusion

4. Semi-active temperature label and active temperature label are two complementary products. Semi-active temperature label can collect and record the environmental temperature value of transportation goods. It can be operated independently from card reader. It can be used to record the environmental temperature of goods in production, storage, transportation, sales, and every link before consumption. Because of its real-time, large number of labels read at the same time and good expansibility, the active temperature labels are more suitable for cold-chain vehicle temperature monitoring, while the cargo carriers are inclined to choose. Such products. Through the combination of the two, we hope to effectively improve the quality of cold chain transportation, and thus ensure the quality of goods.