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In this paper, an alternative approach for the measuring and transmission of vital parameters related to High Concentration PhotoVoltaics (HCPV) modules under illumination has been proposed, allowing recovering information from every individual cell. The valuable cell parameters such as temperature and illumination are measured with a dedicated VLSI integrated circuit (IC) that contains also an integrated...
Raman spectroscopy was used to measure a collection of honeys belonging to three botanical origins: chestnut, acacia, and citrus, respectively. The excitation wavelength was set at 1064 nm to mitigate fluorescence effects, and a dispersive detection scheme was used, thus allowing compactness of the optical system. The spectroscopic data were processed using Principal Component Analysis for data dimensionality...
A small direct catalytic methanol ‘fuel cell’ was used for analytical purposes. Three different formats were investigated for methanol and ethanol determination: two different OCV (Open Circuit Voltage) formats and a potentiostatic format, recording the current supplied by the cell. The measurement times using one or other of these three procedures were very different. The time required for the latter...
This work is focused on the development of a new management system for building and home automation that provides a fully real time monitor of household appliances and home environmental parameters. The developed system consists of a smart sensing unit, wireless sensors and actuators and a web-based interface for remote and mobile applications. The main advantages of the proposed solution rely on...
The final aim of this work is the realization of an automatic system based on amperometric measurements able to detect the phosphate in absence of the operator, thus in remote mode control, using automatic valves leaded by a software. The SPEs (screen-printed electrodes) thank to their small size and long term stability, can be easily embedded in a flow system for continuous in situ analysis. Gold...
We present a polynomial correction factor to improve the analytical models proposed in literature to estimate the sensing capacitance of guarded capacitive for displacement measurement. The correction factor has been obtained by fitting parametric numerical calculations based on Finite Element Analysis. The proposed heuristic model provides accurate estimations for a wide range of measuring distances...
This work aims to investigate on the electrical, optical and gas-sensing properties of zinc oxide-based nano-wires (nwZnO) deposited on a crystalline silicon (c-Si) wafer. In particular, a comparison between the less efficient heat treatment for the analyte desorption and the photo-enhanced response will be investigated and discussed for NO2 gas flows.
Waste water management plant protection is a major concern for water cycle management entities. The rapid identification and possible localization of anomalous or even malicious waste liquids immissions may allow for undertaking pollution risk mitigation actions (e.g. using of ancillary basins) and reduce maintainance costs. Pervasive monitoring of the transport network is hence needed although economic...
In this paper the comparison between ideal mechanical and electrical performances and measured ones is presented for one of the most common type of switch typology, the RF-MEMS clamped-clamped capacitive switch. The main sources of deviation from design assumptions and ideal behavior occurring during fabrication are found and examined in detail. They can be summarized in a measurable deviation from...
These papers gather the scientific contributions presented and discussed at the 18th Conference on Sensors and Microsystems AISEM 2015, held in Trento from 3rd to 5th February 2015, with the Technical Sponsorship of IEEE. The conference has been jointly organized by the Fondazione Bruno Kessler and University of Trento in the framework of initiatives sponsored by the Italian Association for Sensors...
Energy harvesting has recently attracted much attention of the research community as a key enabling technology in applications such as autonomous Wireless Sensors Network (WSN), Internet of Things (IoT), e-health and more in general all the applicative scenarios requiring an autonomous low power distributed system. Among the various energy harvesting techniques, vibrational piezoelectric energy harvesters...
The introduction, in the early 70's, of the Ion Sensitive Field Effect Transistor (ISFET), completely revolutionized the biosensing field thanks to its versatility and the reliability of its transduction principle. Since then, a lot of different ISFET-based biosensors have been studied and realized for a great number of applications. Among them, a fast growing field of application is the electrophysiological...
An analysis of the algorithm for period measurement based on a segmentation and labeling technique is shown in this paper. Results of the implementation of the algorithm on an oscilloscope are explained, comparing these with results of the oscilloscope algorithm for period computation. In the last section, results of the algorithm, arranged for a microcontroller with ARM architecture, are shown.
This paper presents an attractive and feasible approach for developing large area flexible pressure sensors by using high concentration nanocomposites of multiwall carbon nanotubes (MWNTs) mixed in poly (dimethyl-siloxane) (PDMS). A shadow mask is prepared by using 3D printer and employed for the patterned deposition of nanocomposites on 25 µm thick flexible polyethylene terephthalate (PET) substrate...
This paper describes the modelling and application of memristive systems in sensing technology. The proposed architecture is the adoption of memristive devices in place of laser trimming calibration technique to customise a sensor interface. Memristors can also work in combination with analogue and digital electronics to build adaptive systems. Several approaches have been made to overcome some of...
In this paper, the mechanics of Aluminum/Polyimide stretchable interconnects is investigated in relation to the structural design of the metal conductor. In-situ electron- and laser-scanning microscopy are combined with mechanical testing to perform both morphological and topographical analysis of failure mechanisms at the small scale. An interplay between interface delamination and metal film buckling...
Applications of microneedles in biomedicine wide range from diagnostics to therapeutics. This crucial and versatile tool is the interface between the human body and often a complicated device. We present two sensing device based on hybrid microneedles array for diagnostic and therapeutic applications. The hybrid microneedles was fabricated by using a commercial photocatalyzer to solidify a liquid...
To study the electrophysiological activity and dynamics of a large neuronal population, Micro-Electrode Array (MEA) based systems are routinely used. 3-D culture models are nowadays considered a way to better mimic the in vivo situation. Here we present a simple approach based on the concept that dissociated cultured neurons are able to grow on micrometric, self-assembled microbeads to form a structurally...
This work reports on finite element method (FEM) design and fabrication of low cost capacitive pressure sensors for aircraft applications; this work is part of a research activity aimed to develop an embedded sensor-actuator system composed by multi-measure points pressure sensors for flow turbulence detection and coupled plasma actuators for control of separated flows on aircraft wings structures...
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