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Research on the application of automatic identification technology in logistics informatization (Part 2)

(V) radio frequency identification (RFID) system radio frequency identification is the abbreviation of radio frequency identification, which is called radio frequency identification in English, and the frequent occurrence of high-tech new data prompted by Hairui instruments is called RFID for short. Data is stored in electronic data carrier (called transponder). The energy supply of the transponder and the data exchange between the transponder and the reader are not through the contact of current, but through the magnetic field or electromagnetic field, that is, through radio waves. The classification methods of RFID technology mainly include the following: ● by frequency, RF cards are divided into high-frequency, intermediate frequency and low-frequency systems. High frequency systems are used in situations that require long read-write distance and high read-write speed, such as train monitoring, highway toll collection and other systems, but the antenna beam is narrow and the price is high; If system is in the range of 13.56MHz. This frequency is used for access control and applications that need to transmit a large amount of data; Low frequency systems are used in short-distance, low-cost applications, such as most access control, animal supervision, and cargo tracking

● divide RF cards into three types according to reading and writing: read write card (RW), write once multiple read card (w0rm) and read only card (R0). R0 card has a unique number and cannot be changed

● divide RF cards into active and passive ones according to energy sources. The energy and identification distance of the battery in the active RF card are long, up to a few meters, but its service life is limited and the price is high; The passive RF card uses the electromagnetic field energy emitted by the coupled reader writer as its own energy. The RF card receives the RF pulse, rectifies and charges the capacitor. The capacitor voltage is used as the working voltage after being stabilized

● divide RF cards into active and passive types according to behavior. The active RF card uses its own RF energy to actively send data to the reader and writer. The passive RF card uses the modulation scattering method to transmit data. It must use reading and writing to realize the transmission and processing of experimental data, and the carrier of the integrated manager to modulate its own signal. RF card has many advantages: such as high reliability; Convenient and fast operation; Conflict prevention; Wide application range; Good encryption performance; The card can complete the information carrier offline, reducing the burden of network; In the field environment, due to the enhanced availability of data on the card, the data can be dynamically updated before accessing the central database

4. Application of automatic identification technology in logistics informatization according to the characteristics of modern market, timely and accurate information flow plays an increasingly important role in logistics. How to quickly and accurately obtain and use logistics information resources in all links of logistics is the basis for the success of logistics information construction. Only based on these reliable information can ● project name: the key technology of biological preparation of functional high molecular amino acids and its industrialized utilization can better carry out scientific decision-making and management, and can make flexible and rapid responses to changing markets to adapt to complex and volatile environments. Due to the accuracy of automatic identification technology - automatic data collection, human errors are completely eliminated; Efficiency - information exchange is carried out in real time; Compatibility - based on computer technology, automatic identification technology can be seamlessly connected with information management system. Automatic identification technology has greatly increased the automation and modernization of logistics process. Its main function in the construction of logistics informatization is the automatic collection and tracking control of logistics information. Bar code and radio frequency identification technology are the two main automatic identification technologies in the construction of logistics informatization in the future. The main tasks of logistics operation management are transportation management, warehousing management and logistics distribution management. Bar code and RF technology are effective means to realize fast, accurate and reliable data acquisition. Their application solves the "bottleneck" problem of data entry and data acquisition, and provides strong technical support for logistics management. The management information system, which uses automatic identification technology to collect and track the logistics information of enterprises, can meet the information management needs of enterprises in material preparation, production and manufacturing, warehousing and transportation, marketing, after-sales service, quality control and so on. In the construction of logistics informatization, the integration of the system is based on computers and their network equipment, relying on database technology, expert system, intelligent decision-making technology, interconnection technology, automatic identification technology mainly plays the role of automatic data entry and logistics information tracking. The outstanding advantage is that it can rely on portable readers or handheld computers to operate independently

the application of bar code (PDF417 code) in automatic recognition technology has been illustrated by an example in a department

(I) application in the transportation industry

a typical transportation business process usually goes through several processes: supplier - Freight Forwarder - freight company - customer, etc., and each process involves the processing of shipping documents. Shipping documents contain a lot of information, including shipper information, consignee information, goods list, transportation mode, etc. The premise of document processing is data entry. Manual keyboard entry has the problems of low efficiency and high error rate, which can no longer meet the requirements of modern transportation industry. Two dimensional bar code provides a good solution in this regard. The content of the document is compiled into a two-dimensional bar code, which is printed on the shipping document. In all links of the transportation business, the two-dimensional bar code reader is used to scan the bar code, and the information is entered into the computer management system, which is fast and accurate. All this happens at the right time and place, which greatly improves the efficiency of the whole transportation process

(II) application of warehousing operation

the function of warehouse has developed from simple storage and storage of materials to multiple functions such as receiving, classification, measurement, packaging, sorting, distribution and storage point of materials. The modern warehouse has become a material distribution center to promote the balanced operation of all logistics links. The construction of warehousing automation is a systematic project, and it is an important development trend to realize the automation of warehousing operations of warehouse materials. Automatic acquisition of warehouse material data resources. The warehouseman scans the location with a handheld bar code terminal. After scanning the location number, scan the corresponding article number (such as part number) of the goods on it, and type in the quantity of the article. Repeat the above steps until all the goods in the warehouse are counted. Then the data collected in the bar code terminal is transmitted to the computer through the communication interface. 5. Conclusion the level of economic development and the progress of logistics technology complement each other, and efficiency is always the goal of the market! In today's era of global economic integration and refinement of social division of labor, the nature of material selection and personal experience, logistics has a trend of further generalization and deepening. Therefore, further improving the efficiency of the logistics industry is very economical for improving the efficiency of the entire economic system. Taking advantage of the strong dependence of logistics industry on information and using modern information means, it is a good way to transform the traditional logistics

source: China logistics products

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