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Erratum published on 26 October 2016, see Sensors 2016, 16(11), 1788.

Open AccessArticle
Sensors 2016, 16(9), 1484;

Mathematical Model and Calibration Procedure of a PSD Sensor Used in Local Positioning Systems

Department of electronics, University of Alcalá, Alcalá de Henares, Madrid 28801, Spain
Informatics Engineering Department, Eastern Macedonia and Thrace Institute of Technology, Kvala 65404, Greece
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 6 July 2016 / Revised: 5 September 2016 / Accepted: 7 September 2016 / Published: 15 September 2016
(This article belongs to the Section Physical Sensors)
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Here, we propose a mathematical model and a calibration procedure for a PSD (position sensitive device) sensor equipped with an optical system, to enable accurate measurement of the angle of arrival of one or more beams of light emitted by infrared (IR) transmitters located at distances of between 4 and 6 m. To achieve this objective, it was necessary to characterize the intrinsic parameters that model the system and obtain their values. This first approach was based on a pin-hole model, to which system nonlinearities were added, and this was used to model the points obtained with the nA currents provided by the PSD. In addition, we analyzed the main sources of error, including PSD sensor signal noise, gain factor imbalances and PSD sensor distortion. The results indicated that the proposed model and method provided satisfactory calibration and yielded precise parameter values, enabling accurate measurement of the angle of arrival with a low degree of error, as evidenced by the experimental results. View Full-Text
Keywords: positioning; measurement; PSD; LPS; calibration; infrared positioning; measurement; PSD; LPS; calibration; infrared

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Rodríguez-Navarro, D.; Lázaro-Galilea, J.L.; Bravo-Muñoz, I.; Gardel-Vicente, A.; Domingo-Perez, F.; Tsirigotis, G. Mathematical Model and Calibration Procedure of a PSD Sensor Used in Local Positioning Systems. Sensors 2016, 16, 1484.

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