By Topic

Proximity sensor using a spiral-shaped light-emitting mechanism

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Okada, T. ; Dept. of Inf. Eng., Niigata Univ., Japan ; Rembold, U.

A proximity sensor is presented in which light is cast from a source point on an object through a slit cut in a rotating disk. The light passing through the slit is reflected onto the object's surface. Some of the reflected light is captured by a photodiode with the time period being recorded. The distance is determined from the function of the slit's shape and the time period when the photodiode captures the reflected light. The light-emitting mechanism makes it possible to measure the distance of an object repetitively. The distance measurement is neither affected by environmental illumination nor by attributes of the object such as diffusibility or reflectivity as far as there is light to reach the photodiode. Two profiles of the slit are discussed. One allows for easy fabrication and the other simplifies signal processing. The validity of the measurement concerning the two profiles is shown by experimental results

Published in:

Robotics and Automation, IEEE Transactions on  (Volume:7 ,  Issue: 6 )