Limits...
HyperCube: A Small Lensless Position Sensing Device for the Tracking of Flickering Infrared LEDs.

Raharijaona T, Mignon P, Juston R, Kerhuel L, Viollet S - Sensors (Basel) (2015)

Bottom Line: Without any optics and a field-of-view of about 60°, a novel miniature visual sensor is able to locate flickering markers (LEDs) with an accuracy much greater than the one dictated by the pixel pitch.The minimalistic design in terms of small size, low mass and low power consumption of this visual sensor makes it suitable for many applications in the field of the cooperative flight of unmanned aerial vehicles and, more generally, robotic applications requiring active beacons.Experimental results show that HyperCube provides useful angular measurements that can be used to estimate the relative position between the sensor and the flickering infrared markers.

View Article: PubMed Central - PubMed

Affiliation: Aix-Marseille Université, ISM UMR 7287, 13288, Marseille Cedex 09, France. thibaut.raharijaona@univ-amu.fr.

ABSTRACT
An innovative insect-based visual sensor is designed to perform active marker tracking. Without any optics and a field-of-view of about 60°, a novel miniature visual sensor is able to locate flickering markers (LEDs) with an accuracy much greater than the one dictated by the pixel pitch. With a size of only 1 cm3 and a mass of only 0.33 g, the lensless sensor, called HyperCube, is dedicated to 3D motion tracking and fits perfectly with the drastic constraints imposed by micro-aerial vehicles. Only three photosensors are placed on each side of the cubic configuration of the sensing device, making this sensor very inexpensive and light. HyperCube provides the azimuth and elevation of infrared LEDs flickering at a high frequency (>1 kHz) with a precision of 0.5°. The minimalistic design in terms of small size, low mass and low power consumption of this visual sensor makes it suitable for many applications in the field of the cooperative flight of unmanned aerial vehicles and, more generally, robotic applications requiring active beacons. Experimental results show that HyperCube provides useful angular measurements that can be used to estimate the relative position between the sensor and the flickering infrared markers.

No MeSH data available.


Related in: MedlinePlus

Comparison between the angular sensitivity of a photosensor embedded on HyperCube (red solid line) and the cosine-like angular sensitivity of the model (blue dashed dot line) given by Equation (2) and the Gaussian angular sensitivity (dashed green line) given by Equation (1) with the acceptance angle Δρ = 120°.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4541889&req=5

f6-sensors-15-16484: Comparison between the angular sensitivity of a photosensor embedded on HyperCube (red solid line) and the cosine-like angular sensitivity of the model (blue dashed dot line) given by Equation (2) and the Gaussian angular sensitivity (dashed green line) given by Equation (1) with the acceptance angle Δρ = 120°.

Mentions: From Figure 6, the angular sensitivity of a photosensor as a blue dotted dashed line is compared to the Gaussian angular sensitivity given in Equation (1) as a green dashed line. One can note that the angular sensitivity of a photosensor does not strictly shape the Gaussian-like one and could also be approximated by a cosine-like angular sensitivity, which is plotted in red.


HyperCube: A Small Lensless Position Sensing Device for the Tracking of Flickering Infrared LEDs.

Raharijaona T, Mignon P, Juston R, Kerhuel L, Viollet S - Sensors (Basel) (2015)

Comparison between the angular sensitivity of a photosensor embedded on HyperCube (red solid line) and the cosine-like angular sensitivity of the model (blue dashed dot line) given by Equation (2) and the Gaussian angular sensitivity (dashed green line) given by Equation (1) with the acceptance angle Δρ = 120°.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541889&req=5

f6-sensors-15-16484: Comparison between the angular sensitivity of a photosensor embedded on HyperCube (red solid line) and the cosine-like angular sensitivity of the model (blue dashed dot line) given by Equation (2) and the Gaussian angular sensitivity (dashed green line) given by Equation (1) with the acceptance angle Δρ = 120°.
Mentions: From Figure 6, the angular sensitivity of a photosensor as a blue dotted dashed line is compared to the Gaussian angular sensitivity given in Equation (1) as a green dashed line. One can note that the angular sensitivity of a photosensor does not strictly shape the Gaussian-like one and could also be approximated by a cosine-like angular sensitivity, which is plotted in red.

Bottom Line: Without any optics and a field-of-view of about 60°, a novel miniature visual sensor is able to locate flickering markers (LEDs) with an accuracy much greater than the one dictated by the pixel pitch.The minimalistic design in terms of small size, low mass and low power consumption of this visual sensor makes it suitable for many applications in the field of the cooperative flight of unmanned aerial vehicles and, more generally, robotic applications requiring active beacons.Experimental results show that HyperCube provides useful angular measurements that can be used to estimate the relative position between the sensor and the flickering infrared markers.

View Article: PubMed Central - PubMed

Affiliation: Aix-Marseille Université, ISM UMR 7287, 13288, Marseille Cedex 09, France. thibaut.raharijaona@univ-amu.fr.

ABSTRACT
An innovative insect-based visual sensor is designed to perform active marker tracking. Without any optics and a field-of-view of about 60°, a novel miniature visual sensor is able to locate flickering markers (LEDs) with an accuracy much greater than the one dictated by the pixel pitch. With a size of only 1 cm3 and a mass of only 0.33 g, the lensless sensor, called HyperCube, is dedicated to 3D motion tracking and fits perfectly with the drastic constraints imposed by micro-aerial vehicles. Only three photosensors are placed on each side of the cubic configuration of the sensing device, making this sensor very inexpensive and light. HyperCube provides the azimuth and elevation of infrared LEDs flickering at a high frequency (>1 kHz) with a precision of 0.5°. The minimalistic design in terms of small size, low mass and low power consumption of this visual sensor makes it suitable for many applications in the field of the cooperative flight of unmanned aerial vehicles and, more generally, robotic applications requiring active beacons. Experimental results show that HyperCube provides useful angular measurements that can be used to estimate the relative position between the sensor and the flickering infrared markers.

No MeSH data available.


Related in: MedlinePlus