Traceability Management of Vegetable Meat Quality and Safety Information
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1.1 Construction background
my country is a big food production and consumption country. With the rapid development of the market economy and the improvement of living standards, meat and vegetables have become important basic necessities for urban and rural residents. In recent years, the Party Central Committee and the State Council have attached great importance to the safety of meat and vegetables in my country. However, the current level of organization of the production and circulation of meat and vegetables is relatively low, the technical level is relatively backward, the system for requesting certificates, invoices, purchase and sales accounts is inadequate, management is difficult, and there are still many hidden dangers in quality and safety. In recent years, food safety incidents such as meat and vegetables have occurred from time to time. The use of information technology has been used to realize the electronicization of requesting certificates, purchase and sales accounts, and establish a meat and vegetable circulation traceability system to achieve the interconnection of circulation node information and form a complete The circulation information chain and the responsibility traceability chain are conducive to improving the safety responsibility awareness of the circulation subject, strengthening preventive measures, forming a traceability and accountability mechanism, and creating a reliable meat and vegetable channel brand; it is conducive to consumer inquiries and rights protection, improving consumption expectations, and promoting consumption; It is conducive to enhancing the government departments’ ability to discover and deal with problematic foods, and to improve the level of food safety supervision and public service: it is conducive to the continuous improvement of the modern circulation system, and the level of market operation regulation: it is conducive to urging producers to engage in production in accordance with food safety standards Processing to improve product quality and safety from the source.
1.2 Introduction to Application Technology
1.2.1 RFID technology
Radio Frequency Identification Technology (Radio Frequency Identification,RFID) Is a non-contact automatic identification technology, which automatically recognizes target objects and obtains data information through radio frequency signals. The recognition does not require manual intervention. It can recognize multiple target objects at the same time. It works in various harsh environments and is fast and convenient.
Schematic diagram of the working principle of the RFID system:
The reader sends a radio frequency signal of a certain frequency through the transmitting antenna. When the electronic tag enters the working area of the transmitting antenna, an induced current is generated, and the electronic tag gains energy and is activated; the electronic tag transmits its own encoding and other information through the card’s built-in transmitting antenna: system receiving antenna After receiving the carrier signal sent from the electronic tag, it is transmitted to the reader through the antenna adjuster, and the reader demodulates and decodes the received signal and then sends it to the main station system for related processing: the main system judges the card’s performance according to logic operations. Legality, corresponding processing and control are made for different settings, and command signals are issued to control the action of the actuator.
According to the different power supply modes of electronic tags, electronic tags can be divided into active tags and passive tags. The active tags are equipped with batteries, and the passive tags are not equipped with batteries.According to the energy supply method, the RFID system is divided into
Active and passive: According to the operating frequency, RFID systems have low frequency, intermediate frequency, high frequency, ultra high frequency, microwave radio frequency, etc. The modern information management system for the meat and vegetable circulation industry requires the characteristics of paperless, orderly, standardized, and intelligent management. The RFID smart tag, because of its waterproof, antimagnetic, antistatic, non-wear, large information storage capacity, multi-use, convenient operation, etc., has become the most ideal solution for modern meat and vegetable circulation information management. As an information carrier, RFID has the following advantages compared with barcodes:
Choosing RFID as the main information storage carrier for platform construction is based on the following considerations:
1. Convenient operation: The reading and writing of RFID data is done through special reading and writing equipment, which uses non-contact and long distance
2. Not affected by the environment: It is especially suitable for the working environment of the meat and vegetable circulation industry. Since the data in the chip is read, it will not be affected by surface dirt, water, and damage to the shell.
3. Large-capacity storage: The file information of meat and vegetables and the records of meat slaughter and meat and vegetable circulation can be stored in the chip, and the information can be read in time with RFID reading equipment and lightly scanning. Pick.
1.2.2 Barcode technology
A barcode is a graphic identifier that arranges multiple black bars and blanks of varying widths according to a certain coding rule to express a group of information. A common barcode is a pattern of parallel lines arranged by black bars (bars for short) and white bars (empty for short) with very different reflectivities. Bar codes can indicate the country of production, manufacturer, product name, production date, book classification number, mail start and end location, category, date and many other information. Therefore, it is used in many fields such as commodity circulation, book management, postal management, and banking systems. Has been widely used.
Commonly used barcode forms are divided into one-dimensional barcodes and two-dimensional (bar) codes. Among them, two-dimensional (bar) codes also have information error correction capabilities based on one-dimensional barcodes, and can carry more information records. .
As the main form of information carrying on the market, barcodes can effectively assist the traceable information recording of meat and vegetables due to their strong reliability, high recognition efficiency, low application cost, simple structure, and easy production. And can provide flexible and diverse information composition, as well as convenient query implementation.
1.2.3 Smart Card Technology
Smart cards are also called CPU cards. There are contact and non-contact cards, and CPU microchips are embedded in them. In layman’s terms, the CPU card chip refers to the chip containing a microprocessor, which functions as a microcomputer. The metal piece on the integrated circuit card (IC card) that people often use is the CPU card chip. The CPU card can be used in many fields such as finance, insurance, traffic police, government industry, etc. It has the characteristics of large user space, fast reading speed, and supports one card for multiple purposes. It has been certified by the People’s Bank of China and the State Commission of Commerce. In terms of appearance, CPU card is no different from ordinary IC card and radio frequency card, but its performance is greatly improved, and its security is much higher than that of ordinary IC card. Usually CPU card contains random number generator, hardware DES, 3DES Encryption algorithms, etc., in conjunction with the operating system, namely the on-chip OS, also known as COS, can reach a financial-level security level.
1.3 System Overview
The meat and vegetable circulation traceability system platform is based on information collection, electronic label application, and multi-channel inquiries. At the same time, it combines the food safety management system, the relevant certification system and the relevant spirit of the food safety management method in the circulation field to design and establish a set of feasible, Perfect, can provide all-round, integrated technology and application support management platform for meat vegetable planting/breeding, production, processing, sales and other links.
1. Global monitoring, real-time detection of each link in the entire chain from the source of the food to the table;
2. Fully automatic identification, using RFID technology to automatically identify the information of each production and circulation link, and automatically obtain the production and circulation information of each link through a fixed or hand-held reader.
3. Traceability, tracking the entire production process of food, and centrally backing up the data to the quality inspection center to provide traceability information for the government and enterprises.
4. Security, using new-generation RFID passive electronic tags, identification response time is fast, and the average failure rate is low, which can ensure the safety, timeliness and stability of the tag identification link.
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