城市智能公交识别系统外文翻译.docx

1、城市智能公交识别系统外文翻译The research of RFID technology and the bus stops automaticallyWhat is the RFID?RFID is the abbreviation for Radio Frequency Identification, called electronics label .RFID recognition is a non-contact automatic identification technology, RFID signal through its automatic target recogni

2、tion and access to relevant data, identify work without manual intervention, it can work in various environments. RFID technology can identify high-speed moving objects and can identify multiple tags, the operation is fast and convenient.RFID is a technology which uses radio communication between ta

3、gs and readers to automatically identify the locations of items. In a networked environment of RFID readers, enormous data are generated from the proliferation of RFID readers. The raw data generated from the readers cannot be directly used by the application because it consists of enormous volume o

4、f data duplication, false positive, and false negative. Thus, the RFID data repositories must cope with a number of quality issues. These data quality issues include data redundancy, false positive, and false negative. Poor data quality has adverse effects at the operational, tactical, and strategic

5、 levels of an organization. This is especially true in the healthcare field where cost pressures and the desire to improve patient care drive efforts to integrate and clean organizational data.What is the basic component of RFID?The most basic RFID system consists of three parts: Tag:Tag consists of

6、 components and chips, each Tag has only electronic coding, adhere to the object for identifiering target; Reader:read (sometimes also can write) label information equipment,it can be designed for portable or fixed; Antenna: Transmit radio frequency signals between in the label and reader.What is th

7、e basic principle of RFID technology ?The basic principle of RFID technology is not complex: Label into the field, Receive radio frequency signals from reader collision, with all the energy stored in a chip of the product information （ passive tag, there is no source label or labels ）, Or actively t

8、o send a frequency signals（active tag and to label or labels）；to read information and understanding of the decoder after the central information systems to carry out the relevant data processing.Basic working process of the RFID systemThe RFID system of basic workflow is: reader through the antenna

9、send certain frequencies of RFID signals, when the RFID card to enter the antenna working area induced current, RF cards gain energy to be activated,RF cards will own coding information through the card built-in transmitting antenna send out, System receiving aerial from RF card from the carrier sig

10、nal, the antenna of a regulator to the reader, the reader to receive a signal and demodulates and decodes to the system to deal with the relevant ； the main system based on logic, determine the legality of smart cards, in different settings make the appropriate treatment and control signals control

11、and direction of movement. In the coupling between inductors and electromagnetic way , communication process (FDX, HDX, SEQ)、From RF card to the reader of data transmission of the load method (modulation, reverse scattering, high time harmonics) and frequency, from the contact method transmission a

12、fundamental difference, but all the reader in principle, and the decision of the design structures are very similar. all the reader is a simple matter of high frequency and control unit two basic module. high frequency interface includes both transmitters and receivers, its functions include: to pro

13、duce high-frequency transmit power to start and provide RF card energy. To launch signal used to send data to RF cards, Receive and demodulation of high frequency signals from RF cards. Different RFID system with some difference frequency interface design, the system frequency inductive coupling int

14、erface diagram shown. Readers of the control unit features include: communicate with the application software, Application software and to execute the order of radio frequencies ； control and communication from the principle of the lord； signal of the decoding. to some specific systems are the colli

15、sion, the algorithm to RF card reader, and to the transfer of data encryption and decryption, as well as on radio frequencies and the readers authentication for an additional function.The RFID system is a key and distance of the parameters. At present, the price of long-distance RFID system is very

16、expensive, thus to improve their reading for distance of the method is very important. Influence factors of distance and RF card reader, including antenna working frequency of RF output power, readers reception sensitivity, RF card power, antenna and the resonant circuit Q value, antenna, RF card re

17、ader and the direction of the coupling, and RF card itself of energy and send information energy etc. Most of the system of writing is read and write different, read the distance is about 40% to 80%.The application of RFID system（1）Application in healthcare Localization of patients, staff, supplies

18、and equipment is very important for healthcare centers to improve service, save costs, and reduce risks. Pilot projects in hospitals demonstrate that RFID localization is a valuable approach. LANDMARC, an RFID localization system (Li et al. 2004), has been applied to facilitate the management of hos

19、pitals and other organizations in case of emergency. The system operates at the frequency of 308MHz, and is composed of active tags, landmark tags, readers, and communication devices. The position of an active tag can be determined by comparing the signal strength detected and the signal strengths o

20、f landmark tags. Using this system to monitor the infectious patients can reduce the number of healthcare professionals and ensure timely response for emergency. Meanwhile, integrated business systems and services (IBSS) announced a success pilot study for using RFID technology to locate assets and

21、personnel at a large healthcare facility in Chicago (OConnor 2005). Emory Healthcare successfully deployed 2.45GHz active RFID devices to track infusion pumps and other high-value equipment to improve asset management and utilization (OConnor 2007). Note that the last two healthcare applications do

22、not employ localization algorithms, instead, they estimate the object location based on the detection from a nearby sensor. The accuracy of location can be improved by integrating localization algorithms.(2)Application in construction material management Tracking the location of construction resourc

23、es enables effortless progress monitoring and supports real-time sensing of construction status. Jaselskis and ElMisalami (2003) developed a prototype RFID tracking system for improving the material procurement process on a construction site. Furthermore, Song et al. (2007) developed a method to loc

24、ate materials on construction sites. The method requires a eld supervisor be equipped with an RFID reader and a GPS receiver. The GPS receiver provides the absolute position information of the supervisor, while the position of the material relative to the supervisor can be determined from the multip

25、le communications between the reader and the tag attached to the materials.Thebusisautomaticallystopsthebackgroundandsignificance The peopleofcaroutforprovidesconvenientservice,whilethebusstopsdirectlyaffectthequalityoftheservice.Traditionalstopsbythecrewartificially,andinthiswaybecauseofitspoorandw

26、orkingintensityeffectistoogreat,inmanybigcitieshavebeeneliminated.Inrecentyears,withthedevelopmentofscienceandtechnologyprogressandmicrocomputertechnologyinmanyfieldshasbeenwidelyused.Intheacousticfield,withvariouspronunciationchipmicrocomputertechnology,cancompletecombinedspeechsynthesistechnology,

27、makesthecarstopscontrollerisrealizedforcitizensbecomespossible,andthusprovideamorepersonalizedservice.Inviewofthetraditionalbusstopssystemdeficiency,combinedwiththeuseofpublictransportvehiclecharacteristicsandpracticaloperatingenvironment,thedesignofasingle-chipmicrocomputercontrolbusstopssystemauto

28、matically.Thebusstopsthedesignofautomaticdeviceismainlytocompensateforchangingthetraditionalvoicestopsdevicemusthavedrivercontrolcanworkbackwardway,pitted,automaticstationbroadcastssix-foot-tallservicetermforthepublicandprovidemorehumanizedmoreperfectservice.Thecharacteristicsofthesystemandadvantage

29、 Thissystemgreatlyimprovetheaccuracyofbusstops,andreliability.Improvingtheservicequalityofthebussystem.Promotethecityeconomicdevelopmentandharmoniousdevelopmentoftrafficchanges.Madeupforchangingthetraditionalvoicestopsdevicemusthavedrivercontrolcanworkmeans,inthebusstopsbehindwhenthestationbroadcast

30、s,automaticsix-foot-tallservicetermforthepublicandprovidemorehumanizedmoreperfectservice.The present status of intelligent city bus stops In the process of informationization in China, a citys public transportation industry becomes the measuring level and a reference point of urban civilization for

31、informationization as an important window. The developing level of public transportation not only represents the image of a city, but also relates with everyone in the city. The Broadcasting System for Bus well embodies services and careness for passengers. At present, the Broadcasting System instal

32、led on the bus is still operated manually with push-button, which may have potential safety hazard. In order to control the speed of each bus, Public Transport Company has to send a worker to record the time when the buses in the same line arrive at the station. The television installed on each bus transmits the same programme all day, which hardly satisf