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What is Wireless Sensors Network

Handbook of Research on Advancements in Robotics and Mechatronics
A set of spatially distributed sensors, which exchange information either between them or with a central information processing unit. In the case of structural condition monitoring such a sensors network provides information about the motion or deformation characteristics of each floor of the building.
Published in Chapter:
Structural Condition Monitoring with the Use of the Derivative-Free Nonlinear Kalman Filter
Gerasimos Rigatos (Unit of Industrial Automation, Industrial Systems Institute, Greece) and Argyris Soldatos (National Technical University of Athens, Greece)
Copyright: © 2015 |Pages: 31
DOI: 10.4018/978-1-4666-7387-8.ch013
The chapter proposes structural condition monitoring for buildings and mechanical structures using a new nonlinear filtering method under the name Derivative-Free Nonlinear Kalman Filtering. The filter makes use of exact linearization of the structure's dynamical model in accordance to differential flatness theory and of an inverse transformation that enables one to obtain estimates for the state vector elements of the initial model. The response of the structure is compared to the response generated by the filter under the assumption of a damage-free model. Moreover, the filter provides estimates of the state vector elements of the structure, which cannot be directly measured, while it can also give estimates of unknown excitation inputs. By comparing the two signals, residuals sequences are generated. The statistical processing of the residuals provides an indication about the existence of parametric changes (damages) in the structure that otherwise could not have been detected.
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A Low Cost Wireless Sensors Network with Low-Complexity and Fast-Prototyping
A network comprising wireless nodes, whose principal function is to acquire physical measures and send them wirelessly towards a base station. Also, these nodes can work as relays to other nodes or directly to the base station, and it must possess the ability to temporarily store its acquired data and the data to be forwarded;
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