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Sensors 2016, 16(11), 1981;

Radius and Orientation Measurement for Cylindrical Objects by a Light Section Sensor

School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 17 October 2016 / Revised: 18 November 2016 / Accepted: 21 November 2016 / Published: 23 November 2016
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [10302 KB, uploaded 23 November 2016]   |  


In this paper, an efficient method based on a light section sensor is presented for measuring cylindrical objects’ radii and orientations in a robotic application. By this method, the cylindrical objects can be measured under some special conditions, such as when the cylindrical objects are welded with others, or in the presence of interferences. Firstly, the measurement data are roughly identified and accurately screened to effectively recognize ellipses. Secondly, the data are smoothed and homogenized to eliminate the effect of laser line loss or jump and reduce the influence of the inhomogeneity of measurement data on the ellipse fitting to a minimum. Finally, the ellipse fitting is carried out to obtain the radii and orientations of the cylindrical objects. Measuring experiments and results demonstrate the effective of the proposed radius and orientation measurement method for cylindrical object. View Full-Text
Keywords: ellipse recognition; rough identification; cylindrical objects ellipse recognition; rough identification; cylindrical objects

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Chen, Y.; Liu, C. Radius and Orientation Measurement for Cylindrical Objects by a Light Section Sensor. Sensors 2016, 16, 1981.

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