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http://dx.doi.org/10.5369/JSST.2003.12.6.258

Implementation on the Portable Blood Gas Analyzer and Performance Estimation/A Study on the Hydrometer Calibration System using Image Processing  

Lee, Yong-Jae (Mass and Force Group, Devision of Physical Metrology, Korea Research Institute of Standards and Science)
Chang, Kyung-Ho (Mass and Force Group, Devision of Physical Metrology, Korea Research Institute of Standards and Science)
Oh, Chae-Youn (School of Mechanical & Aerospace System Engineering, MRC, ChonBuk Univ.)
Jung, Sang-Duk (School of Mechanical & Aerospace System Engineering, MRC, ChonBuk Univ.)
Publication Information
Journal of Sensor Science and Technology / v.12, no.6, 2003 , pp. 258-264 More about this Journal
Abstract
The present paper studies how to calibrate hydrometer using image process. The method aligns particular scales of hydrometer selected for calibrating the hydrometer with the horizontal plane of the reference liquid automatically without man's operation. Major parts composing the system are CCD camera, frame grabber, stepping motor and image process program. The image process program is composed of a part that locates the meniscus and aligns it with a scale and a part that controls the step motor. To verify the performance of the developed method, this study compares the meniscus and scale observed directly with the naked eye with the result of calibration by the manual calibration method. The differences between the corrections were less than $0.004\;kg/m^3$ with uncertainty of $0.06\;kg/m^3$. These showed that the calibration results of the developed hydrometer calibration using image process nearly equal to manual method.
Keywords
scale alignment; hydrometer calibration; least-scale; uncertainty;
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  • Reference
1 Myler H. R., Weeks A. R., The Pocket Handbook of Imaging Processing Algorithms in C. Upper Saddle River, Prentice Hall, pp. 30-31. 157-159, 239-240, 1993
2 장경호, 이용재, 질량 측정에 의한 부피계의 표준 교정 절차, 한국 계량 측정 협회. KASTO 00-05-1040-026
3 Cuckow F. W., J. Soc. Chem. Ind., vol. 68, pp. 44-49, 1949   DOI
4 Lorefice S., Heinonen M., and Madec T., Metrologia, vol. 37, pp. 141-147. 2000   DOI   ScienceOn
5 Gonzalez R. C., and Woods R. E., Digital Image Processing, Boston, Addison- Wesley, 2000