Examinando por Materia "Security systems"

Mostrando 1 - 11 de 11
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    Ítem
    Analysis of a developed analog trilateration system of impulsive sounds
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias; Electromagnetismo Aplicado (Gema)
    A characterization study is made from a trilateration system for impulsive sounds, in which theoretical analysis and experimental results are presented. This system uses an analog trilateration method, avoiding to implement high frequency ADC conversion elements. It also presents the optimization of the chosen array of microphones, thus allowing for a better trilateration algorithm behavior. © 2014 SPIE.
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    Ítem
    Analysis of a developed analog trilateration system of impulsive sounds
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    A characterization study is made from a trilateration system for impulsive sounds, in which theoretical analysis and experimental results are presented. This system uses an analog trilateration method, avoiding to implement high frequency ADC conversion elements. It also presents the optimization of the chosen array of microphones, thus allowing for a better trilateration algorithm behavior. © 2014 SPIE.
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    Ítem
    Aplicación de redes de sensores inalámbricos (WSN) en un sistema de seguridad para los equipos móviles de la Universidad EAFIT
    (Universidad EAFIT, 2011) Villada Ramírez, Juan Camilo; Ospina Mendoza, Sandra Patricia; Jaramillo Jaramillo, Mario; Medina Sánchez, Wilson
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    Ítem
    Development of an intercom: An undergraduate case study
    (SPIE-INT SOC OPTICAL ENGINEERING, 2013-01-01) Alejandro Betancur, J.; Osorio, Gilberto; Cardona, Francisco; Alejandro Betancur, J.; Osorio, Gilberto; Cardona, Francisco; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecánica Aplicada
    This paper gives a short description of a low cost communication device. The wireless intercom devices presented here enable communication between any two of these products through specialized synchronization options. This communication system consists of two functionally linked radiofrequency intercoms in the 2.4GHz free band. Each of these devices consist of a hands-free cellular system containing a microphone and a loudspeaker, which is connected individually to each communication device through a plug of four (4) contacts and three point five (3.5) mm in diameter, it also has a single USB connector for battery charging (without data bus), which is made of a lithium polymer, and finally three (3) buttons from where certain functions are controlled: volume level, audio filters, on, off, among other. © 2013 SPIE.
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    Ítem
    Gunshot identification system by integration of open source consumer electronics
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    This work presents a prototype of low-cost gunshots identification system that uses consumer electronics in order to ensure the existence of gunshots and then classify it according to a previously established database. The implementation of this tool in the urban areas is to set records that support the forensics, hence improving law enforcement also on developing countries. An analysis of its effectiveness is presented in comparison with theoretical results obtained with numerical simulations. © 2014 SPIE.
  • No hay miniatura disponible
    Ítem
    Gunshot identification system by integration of open source consumer electronics
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias; Electromagnetismo Aplicado (Gema)
    This work presents a prototype of low-cost gunshots identification system that uses consumer electronics in order to ensure the existence of gunshots and then classify it according to a previously established database. The implementation of this tool in the urban areas is to set records that support the forensics, hence improving law enforcement also on developing countries. An analysis of its effectiveness is presented in comparison with theoretical results obtained with numerical simulations. © 2014 SPIE.
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    Ítem
    Low-cost localization system of impulsive sounds for urban environments
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias; Electromagnetismo Aplicado (Gema)
    A low-cost acoustic localization system is presented, in which a video camera is directed towards the source of impulsive sounds such as gunshots. An analog filter is implemented at the first stage, in order to reduce the range of frequencies to analyze, hence narrowing and improving the localization of gunshots. The system is design for the integration of open source consumer electronics and processing devices, which makes large-scale deployment possible even in developing countries. Furthermore, results are also obtained with a prototype that shows a high percentage of successes.. © 2014 SPIE.
  • No hay miniatura disponible
    Ítem
    Low-cost localization system of impulsive sounds for urban environments
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) López R., J.M.; Marulanda B., J.I.; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    A low-cost acoustic localization system is presented, in which a video camera is directed towards the source of impulsive sounds such as gunshots. An analog filter is implemented at the first stage, in order to reduce the range of frequencies to analyze, hence narrowing and improving the localization of gunshots. The system is design for the integration of open source consumer electronics and processing devices, which makes large-scale deployment possible even in developing countries. Furthermore, results are also obtained with a prototype that shows a high percentage of successes.. © 2014 SPIE.
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    Ítem
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    Seguimiento de neonatos en hospitales inteligentes: una aplicación de la tecnología RFID para la seguridad y cuidado de la salud
    (Universidad EAFIT, 2008) Gómez González, Daniel; Montoya Múnera, Edwin Nelson
    Los Hospitales Inteligentes son entes con conciencia del contexto (context-aware) -- Para alcanzar esta “conciencia” se valen de la computación pervasiva 1y/o ubicua -- Un hospital se denota como “inteligente” dependiendo de la conciencia que tenga, es decir, dependiendo de los sistemas que tenga para capturar e interpretar eventos, que van desde información básica del contexto que incluye, presencia del personal médico, aparatos, instrumentos y medicaciones, hasta información compleja de correlación de datos que suministre alarmas u otro tipo de información valiosa [1] -- La Identificación por Radio Frecuencia (Radio Frequency IDentification - RFID) es una tecnología inalámbrica que provee un potencial sin límites para este tipo de aplicaciones [2] -- La industria RFID ha tenido un gran crecimiento desarrollando y aplicando la tecnología, lo que ha reducido los costos y hace posible hoy en día pensar en utilizarla como una red que habilite la infraestructura de un Hospital para captura de eventos que lo hagan consciente e inteligente -- El tema tratado en este proyecto de grado fue el control y seguimiento de pacientes en hospitales con la tecnología RFID -- Este seguimiento parte de la necesidad de tener un control sobre los pacientes, específicamente de los neonatos, para así asegurar las relaciones del recién nacido con el personal médico, acudientes y visitantes, que provean alarmas en caso de salidas de los neonatos de las zonas demarcadas por el sistema como seguras -- Este prototipo se encarga de vigilar puntos de pasos obligados para así detectar por medio de etiquetas UHF (Ultra High Frequency) RFID (Radio Frequency Identification) pasiva, el paso de los recién nacidos por estos puntos de control -- Al contar con una arquitectura web se facilita el acceso a la aplicación desde cualquier terminal que se encuentre en la intranet de un hospital -- El prototipo alerta sobre salidas no autorizadas a todos los puntos de control que tengan abierta la página web de monitoreo, avisando al personal de vigilancia de forma visual y sonora que ha salido un neonato para que éste a su vez pueda ver el estado de autorización de salida del neonato y de la persona que lo acompaña y proceder con su verificación
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    Ítem
    Smart army helmet: A glance in what soldier helmets can become in the near future by integrating present technologies
    (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01) Betancur, J. Alejandro; Osorio-Gomez, Gilberto; Mejia, Alejandro; Rodriguez, Carlos A.
    Nowadays, technologies like improved reality systems, sensing systems and communication systems, are moving forward with a high rate. This situation is very convenient for military groups that are trying to access modern technologies. According to that, it is very feasible to propose the development of electronic devices that increase the possibilities for soldiers to be alive during an armed conflict, providing them with information that can bring strategic benefits on the combat field, which is the main goal of this research. Therefore, it is proposed in this paper the early design stages of a smart army helmet, focusing in their low cost production; however, all the electronics stages specified here are proposed as prototypes. © 2014 SPIE.