By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Sensor Research are discussed in a new report. According to news reporting originating in Laquila, Italy, by VerticalNews journalists, research stated, "In this paper, we propose novel fully analog uncalibrated readout circuits for wide-range capacitance estimation. The working principle is based on a modified De-Sauty ac bridge configuration where two capacitances and two resistances are employed."
The news reporters obtained a quote from the research from the University of Aquila, "Through the use of a voltage controlled resistor and of a suitable feedback loop, an accurate estimation over a wide range of the sensor capacitance variation is possible, also without the knowledge of the other bridge component values. The first two proposed solutions are able to estimate, experimentally, similar to 1.5 decades (optimized range: [25-840 nF]) and more than 3 decades [900 pF-1.1 mu F] of capacitive variations, respectively, ensuring, continuously, the bridge equilibrium condition; the third interface allows the evaluation of the sensor capacitance also outside this condition, increasing the capacitive variation decades to more than 4 [81 pF-1.1 mu F]. The proposed topologies have been also modified to detect the capacitive sensor parasitic resistance. In this case, experimental results on PCB have demonstrated the capability to simultaneously estimate similar to 1.7 capacitive [2-100 nF] and 1.5 resistive variation decades [33 k Omega-1.2 M Omega]."
According to the news reporters, the research concluded: "Finally, a suitable optimization of the operating range of the first proposed solution, obtained through a proper passive components sizing, has been performed with the aim to employ the commercial humidity sensor HCH-1000 in a high accuracy (11.4 bits) RH% detection."
For more information on this research see: Novel Modified De-Sauty Autobalancing Bridge-Based Analog Interfaces for Wide-Range Capacitive Sensor Applications. IEEE Sensors Journal, 2014;14(5):1664-1672. IEEE Sensors Journal can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Sensors Journal - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7361)
Our news correspondents report that additional information may be obtained by contacting P. Mantenuto, University of Aquila, Dept. of Ind & Informat Engn & Econ, I-67100 Laquila, Italy. Additional authors for this research include A. De Marcellis and G. Ferri.
Keywords for this news article include: Italy, Europe, Laquila, Sensor Research
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