Automatic ruler scale calibration using a rotary machine
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Publication Details
Author list: Kraiprawes S., Tonmueanwai A., Tangamchit P.
Publisher: Hindawi
Publication year: 2008
Volume number: 2
Start page: 649
End page: 652
Number of pages: 4
ISBN: 1424421012; 9781424421015
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
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Abstract
We combined a rotary machine with a reflecting optical sensor to built a machine that automatically calibrate ruler scales. The optical sensor is mounted on a linear motion rail along the ruler scales It identifies the marked lines on a metal ruler by detecting reflecting light intensity from the lines. Our system then finds distances between lines and counts the number of lines. The measured results were compared with the a reference length obtaining from an encoder of a precise stepping motor to measure the precision of the ruler scale. From the experiment results, the machine is shown to be capable of standard rulers grade 2 calibration. Lastly, the measurement uncertainty of the machine was analyzed ฉ 2008 IEEE.
Keywords
Optical sensor
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