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Electronics 2016, 5(3), 43; doi:10.3390/electronics5030043

A Raspberry Pi Based Portable Endoscopic 3D Measurement System

Institute of measurement and automatic control, Nienburger Straße 17, Leibniz Universität Hannover, 30167 Hannover, Germany
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Academic Editors: Simon J. Cox and Steven J. Johnston
Received: 29 April 2016 / Revised: 15 July 2016 / Accepted: 18 July 2016 / Published: 26 July 2016
(This article belongs to the Special Issue Raspberry Pi Technology)
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Abstract

Geometry measurements are very important to monitor a machine part’s health and performance. Optical measurement system have several advantages for the acquisition of a parts geometry: measurement speed, precision, point density and contactless operation. Measuring parts inside of assembled machines is also desirable to keep maintenance cost low. The Raspberry Pi is a small and cost efficient computer that creates new opportunities for compact measurement systems. We have developed a fringe projection system which is capable of measuring in very limited space. A Raspberry Pi 2 is used to generate the projection patterns, acquire the image and reconstruct the geometry. Together with a small LED projector, the measurement system is small and easy to handle. It consists of off-the-shelf products which are nonetheless capable of measuring with an uncertainty of less than 100 μ m . View Full-Text
Keywords: measurement; endoscopy; fringe projection; triangulation; optics measurement; endoscopy; fringe projection; triangulation; optics
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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

Schlobohm, J.; Pösch, A.; Reithmeier, E. A Raspberry Pi Based Portable Endoscopic 3D Measurement System. Electronics 2016, 5, 43.

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