畢業(yè)設(shè)計 畢業(yè)論文 外文翻譯 rfid簡介 中英文(文件)
【正文】 al RFID systems involve tags and readers interacting with objects (assets) and database systems to provide an information and/or operational function. RFID is used for a wide variety of applications ranging from the familiar building access control proximity cards to supply chain tracking, toll collection, vehicle parking access control, retail stock management, ski lift access, tracking library books, theft prevention, vehicle immobilizer systems and railway rolling stock identification and movement tracking. While RFID systems can yield great productivity gains, they also expose new threats to the security and privacy of individuals and anizations. One of the earliest papers exploring RFID is a landmark paper by Harry Stockman “Communication by Means of Reflected Power” published in 1948. This came on the heels of the radar and radio research undertaken during the Second World War. There are also several technologies related to RFID, such as long range transponder systems of IFF (Identification Friend or Foe) systems for aircraft. It was, however, 30 years before technology caught up with theory, for example, the development of the integrated circuit, the microprocessor and changing business practices. In the 1950s there was a theoretical exploration of RFID techniques with a number of pioneering research and scientific papers being published. In the 1960s various inventors and researchers developed prototype systems. Some mercial systems were launched with the electronic article surveillance (EAS) equipment used as an antitheft device. These systems used 1bit tags detecting the presence or absence of a tag and were used in retail stores attached to high value items and clothing. This proved an effective antitheft measure and is arguably the first and most widespread mercial use of RFID. In the 1970s there was a great deal of interest in RFID from researchers, developers and academic institutions including such anizations as Los Alamos Scientific Laboratory and the Swedish Microwave Institute Foundation. There was much development work in this period and such applications as animal tagging became mercially viable. In the 1980s RFID applications extended into a number of areas. In Europe animal tracking systems became widespread and toll roads in Italy, France, Spain, Portugal and Norway were RFID equipped. The 1990s were significant with the widespread adoption of electronic toll collection in the United States. In 1991 an electronic tolling system opened in Oklahoma where vehicles could pass toll collection points at highway speeds (no toll booths). In Europe there was also considerable interest in RFID applications including toll collections, rail applications and access control. RFID tolling and rail applications appeared in many countries including Argentina, Australia, Brazil, Canada, China, Hong Kong, Japan, Malaysia, Mexico, New Zealand, South Korea, South Africa, Singapore and Thailand. Developments continued in the 1990s with integrated circuit development and size reduction until
公司管理相關(guān)推薦
鄂ICP備17016276號-1