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IPv6 over Low power Wireless Personal Area Networks, also known as 6LoWPAN, is becoming more and more a de facto standard for such communications for the Internet of Things, be it in the field of home and building automation, of industrial and process automation, or of smart metering and environmental monitoring. For all of these applications, scalability is a major precondition, as the complexity...
The keystone of many applications associated to the vision of the Internet of Things is a distributed measurement and data acquisition system. Its design represents a major challenge, because it must enable concurrent measurement of different signals, with heterogeneous sensors and communication protocols. It must also be secure and scalable (in the sense of low marginal cost of adding new features...
In this paper a system of two-stage processing for the detection of acoustic emissions and the localization of the sources is presented. The first stage is programmed in LabVIEW and is dedicated to the detection. A second stage is programmed in Matlab and is devoted to the localization. They are connected by a packet-transfer protocol, which also provides of communication for a remote operation. This...
This paper presents a scheme for comprehensive experimental measurements of Wi-Fi networks spectrum occupancy in the ISM band. The work presented herein provides duty cycle measurements for single and multiple communicating Wi-Fi pairs. Duty cycle results are provided for 802.11b, g and n Wi-Fi standards at different throughput levels. Lower values were observed for 802.11b and g networks. Spectrum...
The big changes in indoor illumination caused by the introduction of LED-based devices may have effects on the health and well-being of the persons that are still under study. From the point of view of flicker, these changes further highlight the inadequacy of the current international standard. With the aim of providing a contribution to a matter that involves several scientific disciplines, new...
Detection of train integrity is a very important research matter affecting safety and more generally railway engineering. Actually the ETCS Level 1 and 2 provide the train integrity and localization functionalities by using track circuits and/or axle counter systems: the problem of these solutions is represented by the high cost of track circuit and axle counter installation, taking into account even...
This paper proposes the use of Synchronous Ethernet in networks with multiple paths for the synthesis of a precise frequency reference for distributed measurement systems. The paper presents novel approach based on a Kalman filter with outlier identification and removal followed by a linear quadratic regulator (LQR). The algorithm, to be implemented within a network element, is able to synthetize...
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