Automatic Door Control System Using Active RFID TechnologyBy Ramos, Mark; Rux, Alan; Drew, James; NSF 2009 Engineering Senior Design Projects to Aid Persons With Disabilities, pages 320-321
Publication Date: 2011
Paper outlines the development of an automatic door control system (DCS) designed for a center that provides vocational day services for adults with developmental disabilities. The DCS system provides a way to automatically operate two automatic sliding entryway doors to the center while restricting their use by clients who should not leave the facility unsupervised. The DCS protects those clients by allowing the staff to place an electronic tag on them that prevents them from exiting unsupervised through the automatic doors. The key components of the DCS are a microcontroller unit (MCU) and an active radio frequency identification (RFID) reader. The reader sends information to the MCU when a tag is detected. This information consists of the unique tag identification number as well as a received signal strength indication (RSSI) value. The RSSI value reflects the strength of the tag’s signal in relation to the reader. As the tag gets closer to the reader, the RSSI value increases. Using the RSSI value, the MCU can filter out tags that are outside the desired range of the doors. When a tag is within range of the doors, the MCU opens two normally closed relays that enable the doors’ motor. This disables the motor and the doors will not slide open. The DCS was developed by an engineering student at the University of Massachusetts Lowell.
Published by: Creative Learning Press, Inc. (Website:http://www.creativelearningpress.com)
Link to text: http://nsf-pad.bme.uconn.edu/2009/CHAPTER%2019%20UNIVERSITY%20OF%20MASSACHUSETTS%20AT%20LOWELL.pdf