Stefano Dalpez

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Wireless distance measurement techniques based on portable embedded platforms are expected to play a key role in several industrial and domestic applications. In this paper the ranging accuracy of a commercial Chirp Spread Spectrum (CSS) kit is evaluated experimentally in a real-world context. The proposed analysis provides more precise and exhaustive(More)
We discuss the initial phases of software development of a real industrial safety-related device in the railway application domain. In particular, to achieve greater confidence in the system, we illustrate the development of the system architecture (using a standard model domain-specific language), the computation of the safety integrity level and the(More)
Wireless sensor networks (WSNs) are commonly considered as a key enabling technology for ambient assisted living (AAL) and smart home services. Essential requirements for this kind of applications are: small node size, long lifetime, little invasiveness and reliable communication over a range of few tens of meters even in presence of obstacles. For this(More)
This paper deals with the design of a safety-critical embedded system for railroad vehicles usually referred to as "dead-man's vigilance device" (DMVD). A DMVD monitors the activity of the operator driving a train to detect his/her possible incapacitation while the vehicle is traveling. The system relies on a redundant and diverse FPGA-based architecture(More)
Safety of machine operation is an increasingly important matter in industrial applications. In this context, embedded systems have successfully been employed to build active barriers that react in real time to prevent injuries and accidents. In this paper, we present a novel safety barrier, based on the capacitive coupling effect, to detect the proximity of(More)
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