Linear Range Enhancement Circuit for Linear Variable Differential Transformer (LVDT) by Inverse Hyperbolic Tangent Function Compensation Technique
Article Sidebar
Main Article Content
Abstract
This paper proposes a Linear-Range Enhancement Circuit for Linear Variable Differential Transformer (LVDT). The nonlinearity is compensated with a signal obtained from an inverse hyperbolic tangent function circuit with appropriate gain settings. By configuring the gain in different sections of the circuit to eliminate the 3rd and 5th order term of nonlinearities, it results in enhancement of linearity range with low relative error over the entire operating ranges up to 60 mm with a low linearity relative error (<2%). The simulation results from Pspice® shows the efficiency of the proposed circuit for enhancing the linear operating displacement of the LVDT transducer with a low linearity error when compared to other techniques.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The articles published are the opinion of the author only. The author is responsible for any legal consequences. That may arise from that article.
References
J. R. Wolf, “Linear variable differential transformer and its uses for in-core fuel rod behavior measurements,” presented at the International colloquium on irradiation for reactor safety programmes, Petten, Netherlands, Jun. 25, 1979.
D. Crescini, A. Flammini, D. Marioli, and A. Taroni, “Application of an FFT-based algorithm to signal processing of LVDT position sensors,” IEEE Transactions on Instrumentation and Measurement, vol. 47, no. 5, pp. 1119–1123, 1998.
G. Chen, B. Zhang, P. Liu, and H. Ding, “An adaptive analog circuit for LVDTs nanometer measurement without losing sensitivity and range,” IEEE Sensors Journal, vol. 15, no. 4, pp. 2248–2254, 2015.
L. B. Brahim, M. Benammar, M. A. Alhamadi, N. A. Al-Emadi, and M. A. Al-Hitmi, “A new low cost linear resolver converter,” IEEE Sensors Journal, vol. 8, no. 10, pp. 1620–1627, 2008.
S. K. Mishra, G. Panda, and D. P. Das, “A novel method of extending the linearity range of linear variable differential transformer using artificial neural network,” IEEE Transactions on Instrumentation and Measurement, vol. 59, no. 4, pp. 947–953, 2010.
H. Ganesan, B. George, S. Aniruddhan, and S. Haneefa, “A dual slope LVDT-to-Digital converter,” IEEE Sensors Journal, vol. 19, no. 3, pp. 868–876, 2019.
P. Prommee, K. Angkeaw and K. Karawanich, “Low-Cost linearity range enhancement for linear variable differential transformer,” IEEE Sensors Journal, vol. 22, no. 4, pp. 3316–3325, 2022.
W. Petchmaneelumka, K. Songsuwankit, J. Tongcharoen, and V. Riewruja, “Linearrange extension for linear variable differential transformer using binomial series,” Sensors and Materials, vol. 32, no. 2, pp.475–485, 2020.
P. Apisitticharoonlert, W. Petchmaneelumka, and V. Riewruja, “Inverse sine function circuit with temperature compensation,” in International MultiConference of Engineer and Computer Scientists 2016 (IMECS), Hong Kong, 2016, pp. 616–619.