1 / 12

Radio Frequency Identification

Radio Frequency Identification Yang Gu What is RFID? RFID is a generic term It use radio waves to automatically identify objects. the most common method is to store a serial number on a microchip that is attached to an antenna . RFID System, Components Components T ransponder (tag)

jaden
Download Presentation

Radio Frequency Identification

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radio Frequency Identification Yang Gu

  2. What is RFID? • RFID is a generic term • It use radio waves to automatically identify objects. • the most common method is to store a serial number on a microchip that is attached to an antenna.

  3. RFID System, Components

  4. Components • Transponder (tag) • located on the object to be identified • consists of a coupling element and an electronic microchip. • Tags are available with storage capabilities from 512 bytes to 4MB. • Reader, contains • a high frequency module • a control unit and a coupling element to the transponder.

  5. Tag options • Passive tags • draw power from the magnetic field generated between itself and a reader • Active tags: • larger and more expensive • self-powered by an internal battery • Can either provide active presence or active location information.  • Active location RFID systems support a higher effective read range with greater resolution capabilities

  6. The read range for a typical RFID tag • It depends on many factors • the frequency of operation, • the size and shape of the tag, • the power of the reader, • interference from metal objects or other RF devices. • In general, • low-frequency passive tags are read from a foot or less. High frequency passive tags are read from about three feet • UHF tags are read from 10 to 20 feet. • semi-passive and active tags use batteries to boost read ranges to 300 feet or more.

  7. How much do RFID tags costs? • 30 cents - $50 depending on the type of tag and the application. • Active tags – those with a battery – can cost far more. • And if you bundle in a sophisticated sensor, the cost can rise to more than $100.

  8. Next Step: RFID and Intelligent Agent • Most readers have additional interface (RS 232, RS 485, ...) to enable it to forward the data received to the segway robot. • Information provided by RFID systems can be used as vision for automate decision-making processes

  9. Is it suitable for Segway? • RFID • UHF/microwave tags • n/a • Using active tags for moving objects and passive or semi-passive tags for markers?? • Can be as precise as within a few centimeters (RTLS) • cost?? • Segway • read range ~24 feet • Update frequency 25Hz (current vision) • Not only object identification, but also a need to precisely locate objectsin real-time. • Distance precision

  10. Compare with vision • Vision update rate = 25 frames/sec, RFID n/a (best known: update every few seconds) ?? • Position precision: best known RFID can do much better than vision does. ?? • RFID can locate both relative and global position for the tagged objects on the field without “looking” at them! • Easy setup for RFID, does not need color training or calibration. • RFID is more expensive than using multiple web-cameras but save much more effort in software implementation.

  11. Issues • Update rate and distance precision • Cost for a tracking system • Interface (hardware/software) • Orientation • the reader cannot communicate effectively with a tag that is oriented perpendicular to the reader antenna.

  12. Conclusion • If the update rate and position precision satisfy, RFID is definitely a better choice to do soccer game. RFID will let us focus more on strategy based on a precise world model. • 

More Related