RFID shelf life indicator allows goods to have their own language

The RFID shelf life indicator consists of an RFID Reader and RFID particles. As a high-tech technology that collects and processes information quickly, real-time, and accurately, RFID technology can be widely used in various industries such as production, retail, logistics, and transportation through the unique and effective identification of physical objects. The advantages of RFID shelf life indicators are:

(1) There is no need for optical visualization and non-contact to complete the identification work. In cold chain logistics, a large amount of food needs to be identified. The use of RFID technology solves the shortcomings of barcode technology such as slow identification speed and complicated identification operations, and improves efficiency.

(2) No manual intervention is required during work and it is not easily damaged, reducing the probability of errors due to human reasons. Since barcodes are prone to wear and tear during the identification operation, food quality cannot be effectively identified. However, RFID shelf life indicators do not require manual intervention on food and can grasp the quality of food by reading the data of particles.

(3) It can identify moving objects from a long distance, which improves the processing speed of traditional goods when sorting and registering information. RFID shelf life indicators do not require manual operation to read food environment and quality information at close range. Through radio frequency technology, communication can be completed over long distances, improving the speed of registering food quality information.

(4) Able to monitor, evaluate and predict food in real time. Traditional technology cannot monitor, evaluate and predict the quality of food in real time according to changes in the current environment. This makes the quality of food in the cold chain logistics process unable to be reflected in real time. The RFID shelf life indicator collects some quality information of the food. , can monitor the quality of food in real time.

Problems to be solved with RFID shelf life indicators

During refrigerated transportation, the radio frequency device operates in a typical industry environment: first, the device works in harsh environments such as low temperature, moisture, mechanical vibration, impact, and large-scale metal interference, electromagnetic interference; second, the radio frequency device requires a long identification distance. It can achieve rapid recognition of multiple targets; finally it must have the characteristics of low power consumption, large storage capacity, and long service life. Therefore, higher requirements are placed on the performance of RFID shelf life indicators, which are mainly reflected in:

(1) It should have low power consumption characteristics. In the cold chain logistics process, RFID shelf life indicators need to monitor the quality of food in real time for a long time and consume a lot of energy. They are mainly powered by batteries, and the capacity of the battery has a certain limit and cannot provide unlimited power. , Therefore, this places higher requirements on the power consumption of particles.

(2) It should have anti-interference ability and confidentiality of data communication. During the transportation of food, external signals will interfere with the communication between the RFID reader and the RFID particles, which requires the RFID shelf life indicator to have strong anti-interference energy and confidentiality of data communication.

(3) The system is required to have high stability and reliability. RFID shelf life indicators need to have strong stability and reliability to achieve the goal of real-time monitoring of food.

(4) Can identify multiple mobile RFID particles. At food sources, transfer stations, and destinations, RFID readers need to read multiple moving RFID particles. During the reading process, due to the constant collision of information and the movement of smart RFID particles, there will be a problem of missed reading of RFID particles. and power consumption issues.

In order to realize that RFID shelf life indicators can be better used in food cold chain logistics, it is necessary to study the power consumption of RFID shelf life indicators and the anti-collision issues of multiple mobile RFID particles. The paper needs to conduct research in the following aspects:

(1) A time series power management algorithm needs to be proposed

Cold chain logistics has strong industry specificity. RFID shelf life indicators need to monitor the storage environment and quality information of food in real time during this process, and need to calculate and Store data, which consumes a lot of energy. Existing power management technology generally predicts future working conditions by integrating previous states, and cannot be effectively applied in cold chain logistics. This paper proposes a time-series power management algorithm, which manages intelligent RFID particles according to divided operating modes and optimizes the balance between power consumption and performance of the particles.

(2) It is necessary to propose an intelligent adaptive frame slot ALOHA anti-collision algorithm

Traditional anti-collision algorithms are generally designed for stationary transponders and readers. In the cold chain logistics process, smart RFID readers need to read multiple moving smart RFID particles. In response to this situation, the paper analyzes three situations in which RFID shelf life indicators exist in radio frequency communication in a cold chain logistics environment, and summarizes the common problems in these three situations: some particles will leave the stable communication range; while some New particles will enter stable communication range. There are three technical difficulties that need to be solved to solve this problem. By estimating the number of intelligent RFID particles, the paper proposes an intelligent adaptive frame slot ALOHA anti-collision algorithm. The design idea of the algorithm is mainly to reduce the information between multiple moving particles. collision, and reduce the radio frequency communication time of particles to achieve the goal of reducing power consumption.

(3) It is necessary to design a low-power RFID shelf life indicator

Based on the research on the above two technologies, a low-power RFID shelf life indicator is designed.

The accelerated development of RFID technology promotes the large-scale application of smart retail: With the widespread application of RFID technology and its characteristics of fast reading and writing speed and high accuracy, it will shine in the scanning of goods.