Browsing by Author "Chaca Benavides, Kevin Santiago"

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    Diseño e implementación de un digitalizador sísmico de 4 canales con acceso IP
    (2015) Chaca Benavides, Kevin Santiago; Torres Espinoza, Felipe Andrés; Guevara Baculima, Remigio Clemente
    This document describes the theoretical basis and detailsthe design procedure for implementing a seismic digitizer with 3+1 channels. The equipment is able to connect to the Internet using TCP/IP communication through an RJ-45 connector. The Internet connection allows to sharing the resulting seismic acquired data with a resolution of 24 bits from a geophone or anotherseismic sensor, and to inform userabout operating conditions of the equipment. The digitizer has atouch screen programmed to work asinterfacefor user interaction. In the menu that the screen displays is possibleto choose the sampling frequency among ten different ranging from 1 Hz to 2 kHz. It also allows to choice the method, simple threshold level or STA / LTA, and desired trigger level for automatic detection of events of interest. The display also shows a monitoring of environmental conditions at the place of operation. This thesis also explains the development of a Web application that serves as a remote interface between the digitizer and the user, by which can monitor data acquired in the three channels that collect data from each axial axis and a fourth auxiliary channel; also environmental conditions at the site of operation and GPS information. Through the website the user can download the processed and stored information on MINISEED format, standard format that facilitates the worldwide distribution of seismic data, either in long time series, only the detected seismic events or last second of acquired data. The digitizer is implemented in the Raspberry Pi platform taking advantage of running on a Linux operating system. A microcontroller and integrated circuits of analog-digital conversion madeby the same manufacturer are also used. As a result, a fully functional product is obtained with similar capabilities to a commercial digitizer as distributed by Kinemetrics Basalt; able to connect to the Internet to share information of seismic activity and seismic events recognized at the sensor site; with remote access for monitoring by the user, lower price and acceptableenergy consumption.