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Open AccessArticle

Infrared Sensor System for Mobile-Robot Positioning in Intelligent Spaces

Department of Electronics, University of Alcalá, Alcalá de Henares, Madrid, 28801, Spain
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Author to whom correspondence should be addressed.
Sensors 2011, 11(5), 5416-5438; https://doi.org/10.3390/s110505416
Received: 15 March 2011 / Revised: 14 May 2011 / Accepted: 16 May 2011 / Published: 18 May 2011
(This article belongs to the Special Issue Sensorial Systems Applied to Intelligent Spaces)
The aim of this work was to position a Mobile Robot in an Intelligent Space, and this paper presents a sensorial system for measuring differential phase-shifts in a sinusoidally modulated infrared signal transmitted from the robot. Differential distances were obtained from these phase-shifts, and the position of the robot was estimated by hyperbolic trilateration. Due to the extremely severe trade-off between SNR, angle (coverage) and real-time response, a very accurate design and device selection was required to achieve good precision with wide coverage and acceptable robot speed. An I/Q demodulator was used to measure phases with one-stage synchronous demodulation to DC. A complete set of results from real measurements, both for distance and position estimations, is provided to demonstrate the validity of the system proposed, comparing it with other similar indoor positioning systems. View Full-Text
Keywords: infrared position measurement; phase measurement; robots; sensors infrared position measurement; phase measurement; robots; sensors
MDPI and ACS Style

Gorostiza, E.M.; Lázaro Galilea, J.L.; Meca Meca, F.J.; Salido Monzú, D.; Espinosa Zapata, F.; Pallarés Puerto, L. Infrared Sensor System for Mobile-Robot Positioning in Intelligent Spaces. Sensors 2011, 11, 5416-5438.

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