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VOLUME 7 , ISSUE 5 (December 2014) > List of articles
Special issue ICST 2014
Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 7, Issue 5, Pages 1-5, DOI: https://doi.org/10.21307/ijssis-2019-096
License : (CC BY-NC-ND 4.0)
Published Online: 15-February-2020
A direct resistive sensor interface to a microcontroller reported earlier, works well only if the sensor element is very close to the micro-controller pins. If the sensor element is at a distance from the micro-controller then the lead resistance due to connecting wires between resistive sensor element and the micro-controller introduces appreciable errors in the output. A modified scheme of direct sensor interface to micro-controller is presented here. In the proposed scheme, the effect of lead resistances is compensated and thus the proposed direct resistive sensor interface to a micro-controller works well even if the sensor is kept at distance and connected through long connecting wires. Since the lead wire resistance is compensated, automatic temperature compensation (temperature effect of lead wires) is obtained. The results obtained from simulation and experimental results recorded from a prototype of the proposed scheme establishes the effectiveness of the proposed method in eliminating the effect of lead resistance in the output. Worst-case error noted in the simulation output was < ± 0.23 % and the worst-case error of the prototype unit was found to be < ± 0.33 %.
 E. O. Doebelin, Measurement Systems—Application and Design, 5th ed. New York: McGraw-Hill, 2004.
 Walt Kester , Practical design techniques for sensor signal conditioning, Analog devices, 1999.
 Watanabe, Kenzo; Mochizuki, Kouji, “ A high resolution, linear resistance to frquency converter,” IEEE Trans.Instrum.Meas., vol. 45(3), 1996, pp. 761-764.
 S. Kaliyugavaradhan , “ A linear resistance to time converter with high resolution,” IEEE Trans. Instrum. Meas., vol. 49, #1, Feb. 2000, pp. 151-153.
 N. M. Mohan and V. J. Kumar, “Direct digital converter for a single, active element resistive sensor,” in Proc. IEEE I2MTC, Singapore, 2009, pp. 828–831.
 N. M. Mohan, B. George and V. J. Kumar, “A novel dual slope resistance to digital converter,” IEEE Trans. Instrum. Meas., vol. 59, no. 5, pp. 1013-1018, May 2010.
 Ferran Reverter, "The art of directly interfacing sensors to microcontrollers,"Journal of Low Power Electronics and Applications, 2012, pp. 265-281.
 F. Reverter, J. Jordana, M. Gasulla and R. Pallàs-Areny, “Accuracy and resolution of direct resistive sensor-to-microcontroller interfaces,” Sensors and Actuators A: Physical, 121(1), 2005, pp. 78-87.
 D. Vyroubal, “ A circuit for lead resistance compensation and complex balancing of the strain gauge bridge,” IEEE Trans. Instrum. Meas., vol. 42, no. 1, pp. 44-48, 1993.
 W. Petchmaneelumka, P. Julsereewong, A. Julsereewong, J. Tongpakpanang, “Simple interface circuit with lead-wire-resistance compensation for single resistive sensors,” in Proc. IEEE ICCAS, Korea, Oct. 2012, pp. 1076-1079.
 T. K. Maiti, “ A novel lead-wire-resistance compensation technique using two – wire Resistance Temperature Detector,” IEEE Sensors Journal, vol.6, no. 6, pp. 1454-1458, Dec 2006.
 T. K. Maiti, A. Kar, “ Novel remote measurement technique using resistive sensor as grounded load in an opamp based V - to- I converter,” IEEE Sensors Journal, vol. 9, no. 3, pp. 244-245, March 2009.
 ATmega328 Data Sheet, Atmel Corporation – http://www.atmel.com/images/doc8161.pdf
 Michael Margolis and Nicholas Weldin, “Arduino Cookbook”, (1st ed. ) O‟Reilly Media, March 2001.