ENHANCEMENT OF ACCURACY IN MEASUREMENT OF TEMPERATURE USING AKIMA INTERPOLATION
The accuracy of measuring instruments play vital role in control and monitoring system. The interpolation techniques widely used to reduce measurement error caused by nonlinear characteristics of sensors. In this study, the ability of improving the accuracy in the temperature measurements using the akima interpolation algorithm was investigated in comparison with the linear interpolation method. This study was implemented on the temperature measuring circuit using Arduino UNO M3 and the temperature sensor DS18B20 in the range of 40-50 oC. The interpolation equation was obtained based on the sampling temperature points and their corresponding analog to digital values. Therefore, the other temperature values can be determined by solving the interpolation equation. Simulation and experimental results shown the great benefit of the Akima interpolation method in improving the accuracy of the instrument for measuring temperature. The Akima interpolation algorithm can be also applied for improving the accuracy of measurement of other non electrical quantities.
S. L. Xia, J.L. Wang, R. G. Wang, L. Zhao, “A Temperature Compensation Algorithm Based on Curve Fitting and Spline Interpolation”. Chemical engineering transactions, vol. 51, 2016, pp. 1345-1350.
L. Lei, H. Wang, Y. Bai, “Nonlinear Error Correct of Intelligent Sensor by Using Genetic Algorithms and Cubic Spline Interpolation”. AIAI 2005: Artificial Intelligence Applications and Innovations, 2005, pp. 435-440.
O. A. Gogina, A. A. Belitsky, A. A. Churyumov, “Automatic Customisation of Temperature Sensor Based on Piecewise-Line Interpolation”. 2019 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering, 2019, pp. 511-513.
H. Akima, “A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures’’. J.ACM, vol. 17, no. 4, 1970, pp. 589-602.
D. A. Tuan, B.H. Jeon, “Electron Collision Cross Sections for the Tetraethoxysilane Molecule and Electron Transport Coefficients in Tetraethoxysilane-O2 and Tetraethoxysilane-Ar Mixtures”. Journal of the Physical Society of Japan, vol. 81, no. 6, 2012, pp. 064301-1-8.
P.T. Tuoi, P.X. Hien, D. A. Tuan, “Electron Collision Cross Sections for the TRIES Molecule and Electron Transport Coefficients in TRIES-Ar and TRIES-O2 Mixtures”. Journal of the Korean Physical Society, vol. 73, no. 12, 2018, pp. 1855-1862.
P.X. Hien, B.H. Jeon, D. A. Tuan, “Electron Cross Sections for the BF3 Molecule and Electron Transport Coefficients in BF3-Ar and BF3-SiH4 mixtures”. Journal of the Physical Society of Japan, vol. 82, no. 3, 2013, pp. 034301-1-8.
P.N. Thang, B. T. Thanh, “Error reduction in non-electric measurement by interpolation combined with loop transformation method”. The 2010 International Conference on Advanced Technologies for Communications, Ho Chi Minh, Vienam, 2010, pp. 96-103.
P. N. Thang, N. T. Long, “Non-linear Adjustment of the Transformation Function for the Non-electric Measuring Devices by Using the Spline Interpolation Method”. The 2011 International Conference on Advanced Technologies for Communications, Da nang, Vienam, 2011