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Sensors 2017, 17(11), 2518;

Local Positioning System Using Flickering Infrared LEDs

Aix Marseille University, CNRS, ISM, Marseille 13009 , France
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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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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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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