<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">J.J. Garcia</style></author><author><style face="normal" font="default" size="100%">Ureña, J.</style></author><author><style face="normal" font="default" size="100%">Manuel Mazo</style></author><author><style face="normal" font="default" size="100%">Felipe Espinosa</style></author><author><style face="normal" font="default" size="100%">Álvaro Hernández</style></author><author><style face="normal" font="default" size="100%">Cristina Losada-Gutiérrez</style></author><author><style face="normal" font="default" size="100%">Ana Jimenez</style></author><author><style face="normal" font="default" size="100%">Carlos De Marzziani</style></author><author><style face="normal" font="default" size="100%">Fernando J. Álvarez</style></author><author><style face="normal" font="default" size="100%">García, Enrique</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Sensory system for obstacle detection on high-speed lines</style></title><secondary-title><style face="normal" font="default" size="100%">Transportation Research Part C: Emerging Technologies</style></secondary-title><short-title><style face="normal" font="default" size="100%">Transportation Research Part C: Emerging Technologies</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Railway safety; Obstacle detection; Infrared barrier; Efficient encoding scheme; Principal Component Analysis</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2009</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">On-line</style></volume><pages><style face="normal" font="default" size="100%">1-18</style></pages><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">This work presents an intelligent system which allows the detection of obstacles on railways. The sensory system is based on one barrier of infrared emitters and another of receivers, placed on opposing sides of the railway. Obstacle detection is achieved by a lack of reception in the detectors. The efficiency of the system is improved with the geometrical distribution of the sensory system and the encoding used at the emitting and receiving stages. Additionally optimal estimation techniques have been proposed to avoid false alarms, based on Kalman and H∞ filtering. Furthermore, Principal Component Analysis is applied to validate the obstacle detection, and to improve the efficiency of the system. A high reliability under adverse conditions is obtained with the barrier, it now being possible to detect the presence of obstacles, and to report on their position.

</style></abstract><accession-num><style face="normal" font="default" size="100%">1,082</style></accession-num><call-num><style face="normal" font="default" size="100%">Transportation and Science Technology</style></call-num></record></records></xml>