Sensors 2012, 12(12), 16771-16784; doi:10.3390/s121216771
Article

High Dynamics and Precision Optical Measurement Using a Position Sensitive Detector (PSD) in Reflection-Mode: Application to 2D Object Tracking over a Smart Surface

1,2email, 1,* email and 2email
Received: 18 October 2012; in revised form: 30 November 2012 / Accepted: 30 November 2012 / Published: 6 December 2012
(This article belongs to the Section Physical Sensors)
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Abstract: When related to a single and good contrast object or a laser spot, position sensing, or sensitive, detectors (PSDs) have a series of advantages over the classical camera sensors, including a good positioning accuracy for a fast response time and very simple signal conditioning circuits. To test the performance of this kind of sensor for microrobotics, we have made a comparative analysis between a precise but slow video camera and a custom-made fast PSD system applied to the tracking of a diffuse-reflectivity object transported by a pneumatic microconveyor called Smart-Surface. Until now, the fast system dynamics prevented the full control of the smart surface by visual servoing, unless using a very expensive high frame rate camera. We have built and tested a custom and low cost PSD-based embedded circuit, optically connected with a camera to a single objective by means of a beam splitter. A stroboscopic light source enhanced the resolution. The obtained results showed a good linearity and a fast (over 500 frames per second) response time which will enable future closed-loop control by using PSD.
Keywords: microrobotics; optics; optomechatronics; sensing; PSD; position sensitive detector; smart-surface; tracking algorithm
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.

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MDPI and ACS Style

Ivan, I.A.; Ardeleanu, M.; Laurent, G.J. High Dynamics and Precision Optical Measurement Using a Position Sensitive Detector (PSD) in Reflection-Mode: Application to 2D Object Tracking over a Smart Surface. Sensors 2012, 12, 16771-16784.

AMA Style

Ivan IA, Ardeleanu M, Laurent GJ. High Dynamics and Precision Optical Measurement Using a Position Sensitive Detector (PSD) in Reflection-Mode: Application to 2D Object Tracking over a Smart Surface. Sensors. 2012; 12(12):16771-16784.

Chicago/Turabian Style

Ivan, Ioan A.; Ardeleanu, Mihai; Laurent, Guillaume J. 2012. "High Dynamics and Precision Optical Measurement Using a Position Sensitive Detector (PSD) in Reflection-Mode: Application to 2D Object Tracking over a Smart Surface." Sensors 12, no. 12: 16771-16784.


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