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Sensors 2017, 17(11), 2518; doi:10.3390/s17112518

Local Positioning System Using Flickering Infrared LEDs

1
Aix Marseille University, CNRS, ISM, Marseille 13009 , France
2
Temasek Labs, National University of Singapore, Singapore 117411, Singapore
*
Author to whom correspondence should be addressed.
Received: 29 September 2017 / Revised: 25 October 2017 / Accepted: 26 October 2017 / Published: 3 November 2017
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Abstract

A minimalistic optical sensing device for the indoor localization is proposed to estimate the relative position between the sensor and active markers using amplitude modulated infrared light. The innovative insect-based sensor can measure azimuth and elevation angles with respect to two small and cheap active infrared light emitting diodes (LEDs) flickering at two different frequencies. In comparison to a previous lensless visual sensor that we proposed for proximal localization (less than 30 cm), we implemented: (i) a minimalistic sensor in terms of small size (10 cm 3 ), light weight (6 g) and low power consumption (0.4 W); (ii) an Arduino-compatible demodulator for fast analog signal processing requiring low computational resources; and (iii) an indoor positioning system for a mobile robotic application. Our results confirmed that the proposed sensor was able to estimate the position at a distance of 2 m with an accuracy as small as 2-cm at a sampling frequency of 100 Hz. Our sensor can be also suitable to be implemented in a position feedback loop for indoor robotic applications in GPS-denied environment. View Full-Text
Keywords: indoor positioning; infrared light communication; LED; photodiode (PD); visual motion indoor positioning; infrared light communication; LED; photodiode (PD); visual motion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Raharijaona, T.; Mawonou, R.; Nguyen, T.V.; Colonnier, F.; Boyron, M.; Diperi, J.; Viollet, S. Local Positioning System Using Flickering Infrared LEDs. Sensors 2017, 17, 2518.

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