tailieunhanh - Radio Frequency Identification Fundamentals and Applications, Bringing Research to Practice Part 7

Tham khảo tài liệu 'radio frequency identification fundamentals and applications, bringing research to practice part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 8 Applications of RFID Systems -Localization and Speed Measurement Valentin Popa Eugen Coca and Mihai Dimian Faculty of Electrical Engineering and Computer Science Stefan cel Mare University of Suceava Romania 1. Introduction Many efforts were made in the last years in order to develop new techniques for mobile objects identification location and tracking. Radio Frequency Identification RFID systems are a possible solution to this problem. There are many different practical implementations of such systems based on the use of radio waves from low frequencies to high frequencies. In this chapter we present a short review of existing RFID systems and an in depth analysis of one commercial development system. We also present a speed measurement application using the same RFID system. The last section of this chapter offers important electromagnetic compatibility EMC information regarding the use of high frequency RFID systems. All results are from experiments performed in real life conditions. EMC and speed measurements were performed in a 3 m semi-anechoic chamber using state-of-the-art equipments. 2. RFID locating systems Localization of mobile objects has become of great interest during the last years and it is expected to further grow in the near future. There are many applications where precise positioning information is desired goods and assets management supply chain management points of interest POIs proximity services navigation and routing inside buildings emergency services as defined by the E911 recommendations FCC 1996 in North America and EU countries etc. There are numerous outdoor solutions based mainly on Global Positioning Systems GPS but there are also so-called inertial systems INS . Solutions based on cellular phone networks signals are another good example of outdoor positioning service. For GPS based solution the precision of location is dictated by a sum of factors almost all of them out of user control. Inertial systems can provide continuous .