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Sensors 2016, 16(5), 714; doi:10.3390/s16050714

Error Ellipsoid Analysis for the Diameter Measurement of Cylindroid Components Using a Laser Radar Measurement System

School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China
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Author to whom correspondence should be addressed.
Academic Editor: Radislav A. Potyrailo
Received: 22 January 2016 / Revised: 16 March 2016 / Accepted: 6 May 2016 / Published: 19 May 2016
(This article belongs to the Section Physical Sensors)
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Abstract

The use of three-dimensional (3D) data in the industrial measurement field is becoming increasingly popular because of the rapid development of laser scanning techniques based on the time-of-flight principle. However, the accuracy and uncertainty of these types of measurement methods are seldom investigated. In this study, a mathematical uncertainty evaluation model for the diameter measurement of standard cylindroid components has been proposed and applied to a 3D laser radar measurement system (LRMS). First, a single-point error ellipsoid analysis for the LRMS was established. An error ellipsoid model and algorithm for diameter measurement of cylindroid components was then proposed based on the single-point error ellipsoid. Finally, four experiments were conducted using the LRMS to measure the diameter of a standard cylinder in the laboratory. The experimental results of the uncertainty evaluation consistently matched well with the predictions. The proposed uncertainty evaluation model for cylindrical diameters can provide a reliable method for actual measurements and support further accuracy improvement of the LRMS. View Full-Text
Keywords: error ellipsoid; uncertainty model; point cloud; laser radar; 3D acquisition error ellipsoid; uncertainty model; point cloud; laser radar; 3D acquisition
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

Du, Z.; Wu, Z.; Yang, J. Error Ellipsoid Analysis for the Diameter Measurement of Cylindroid Components Using a Laser Radar Measurement System. Sensors 2016, 16, 714.

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