Diseño de alarma sísmica
DOI:
https://doi.org/10.31349/RevMexFisE.65.15Keywords:
alarma sísmica, inducción Faraday, amplificador operacional.Abstract
Este trabajo muestra el diseño de una sensible y versátil alarma sísmica basada en elementos de bajo costo o desechos, sustentada en principios y fenómenos físicos básicos tales como: Principio de inducción electromagnética de Faraday, momento angular, amplificador operacional, retraso de pulso, movimientos sísmicos, etc. El sensor de la alarma es una poderosa bobina móvil proveniente de un disco duro de computador, la señal es magnificada por un amplificador operacional µA741 y el pulso de alerta tiene duración ajustada por un circuito integrado “timer” µA 555.
ABSTRACT
This work shows the design of a sensitive and versatile seismic alarm using low-cost items or waste. The design is based on basic principles and physical phenomena such as: electromagnetic induction of Faraday, operational amplifier, angular momentum, delay of pulse, seismic movements, etc. The alarm sensor consist of a powerful mobile coil from a computer hard drive, the signas is amplfied by an oprational amplifier µA741, and the audible pulse has a duration that is programable by an integrated circuit (timer) µA 555.
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Copyright (c) 2019 Juan Carlos Sánchez
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