High & low-level features modelling of nodes in WSNs using SystemC

Performing an adequate modeling of sensors in contemporary sensor networks can be difficult due to the need to include characteristics of high and low level of the entire network into a single software model. This paper presents a novel approach for modeling the nodes in a sensor network, as well as its integration into the network using a programmable parametric structure. The proposed approach was developed in SystemC language considering the properties of this language which perfectly fits the needs of both the hardware description of the nodes, as the complex algorithms that can run on them. The proposed model allows to include several physical node features such as data formats, connections between components and memory, and real limitations in runtime, among others. The developed model is applied to a geoelectrical prospection network in order to demonstrate in practice its advantages and application possibilities, and considering that in such kind of networks nodes act as sensors or actuator, depending on the operation mode in which it is working. Two classic network topologies, chain and bus, are used to test the model with a set of different parameter values. Performance metrics are used to compare the network topologies and their interaction with the node set size, in order to verify the validity of the proposed approach

ACELERÓGRAFO TRIAXIAL PORTÁTIL QUE COMPRENDE UN RECEPTOR DE TRAMAS NMEA-GPS

The invention describes a portable geophysical monitoring instrument designed to acquire and store signals from strong seismic events in a comfortable way for users. It is designed for seismic monitoring applications mainly in civil structures, but it can also be used in open spaces. The measuring instrument complies with all the technical requirements established by the Colombian Geological Institute (formerly Ingeominas) and the U.S. Geological Survey (USGS) in the earthquake resistance standards NSR-98 and NSR-10. La presente invención está dirigida a un instrumento portable de monitoreo geofísico diseñado para adquirir y almacenar señales provenientes de eventos sísmicos fuertes de forma cómoda para los usuarios. Está proyectado para aplicaciones de monitoreo sísmico principalmente en estructuras civiles, pero también puede ser usado en espacios abiertos. El instrumento de medición cumple con todos los requerimientos técnicos establecidos por el Sen/icio Geológico Colombiano (antes Ingeominas) en las normas de sismo resistencia NSR-98 y NSR-10