Optical Sensor for Detecting a Position and an Inclination

[+] Author and Article Information
H. Aoyama

Keio University, 3-14-1 Hiyoshi, Kohokuku, Yokohama, Kanagawa, 223, JAPAN

K. Yamazaki

University of California, Dept. of Mechanical Engineering, Davis, California 95616, U.S.A.

M. Sawabe

Mitutoyo Corporation, 20-1, Sakato 1, Takatsuku, Kawasaki, Kanagawa 213, JAPAN

J. Manuf. Sci. Eng 118(3), 400-405 (Aug 01, 1996) (6 pages) doi:10.1115/1.2831044 History: Received August 01, 1994; Revised April 01, 1995; Online January 17, 2008


This paper deals with an optical sensor designed to automatically measure a sculptured surface geometry. The sensor can continuously and simultaneously detect a position vector (a gap distance) and a unit normal vector (an inclination angle) of a point to be measured without touching. In this paper, the principle of detecting a gap distance and an inclination angle is clarified, and the feasibility of the principle is tested by simulation and by a physical prototype. Developing a primitive prototype, the detectable range of a gap distance and surface inclination are evaluated by experiments. While performing the simulations and the experiments, it became clear that the sensor has a measured range of 20 mm for detecting a gap distance and a measured range from −70 to 70 degrees for detecting an inclination angle with regard to a diffuse surface.

Copyright © 1996 by The American Society of Mechanical Engineers
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