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Proceedings Paper

Prototype security system for Mexico City's light train crossings
Author(s): Mauricio Rodriguez-Juarez; Paulo Lopez-Meyer; Edson Gonzalez-Serrano; Luis Acosta-Mendoza; Mario Silva-Lopez; Florencia Serrania; Juan Hernandez-Cordero
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Paper Abstract

Mexico City’s Light Train, one of the electrical transportation systems belonging to the government of Mexico City, services 40,000 passengers daily in the southern sector of the city. Along its trajectory, the Train has to go through several crossings in which safety for vehicles and pedestrians is of paramount importance. We have developed a prototype security system for these crossings based on infrared (IR) detection systems and laser barriers. All the subsystems used in the prototype are controlled by a PC/104 CPU board via the serial communications port and an A/D card. An IR transmitter installed in the train constantly sends information to several receivers deployed at different locations within the crossing. Once the train is detected, the computer activates a set of alarms and barriers in a logical sequence in order to clear the crossing for the train. The laser barrier, formed by a set of eight transmitters and receivers located at different heights within the crossing, is activated as well and is used as a means to detect other emergency situations such as vehicles or pedestrians stranded in the crossing. Discrimination between real and false alarm situations is achieved by encoding both the IR transmitters and the laser beams. In this paper we will discuss experimental and field trials of the prototype system which will be installed in one crossing this year. Once in place, the Light Train of Mexico City will have its first automated crossing.

Paper Details

Date Published: 8 March 2004
PDF: 9 pages
Proc. SPIE 5272, Industrial and Highway Sensors Technology, (8 March 2004); doi: 10.1117/12.515105
Show Author Affiliations
Mauricio Rodriguez-Juarez, Univ. Nacional Autonoma de Mexico (Mexico)
Paulo Lopez-Meyer, Univ. Nacional Autonoma de Mexico (Mexico)
Edson Gonzalez-Serrano, Univ. Nacional Autonoma de Mexico (Mexico)
Luis Acosta-Mendoza, Univ. Nacional Autonoma de Mexico (Mexico)
Mario Silva-Lopez, Servicio de Transporte Electrico (Mexico)
Florencia Serrania, Servicio de Transporte Electrico (Mexico)
Juan Hernandez-Cordero, Univ. Nacional Autonoma de Mexico (Mexico)


Published in SPIE Proceedings Vol. 5272:
Industrial and Highway Sensors Technology
Brian Culshaw; Michael A. Marcus; John P. Dakin; Samuel David Crossley; Helmut E. Knee, Editor(s)

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