Abstract
This chapter reviews advanced techniques for the direct connection of resistive sensors to digital systems without using any analogue circuit, such as an amplifier or an analogue-to-digital converter, in the signal path. The sensor electronic interfaces proposed herein rely on the following operating principle: the digital system measures through an embedded digital timer the charging/discharging time of an RC circuit formed by the resistive sensor and a known capacitor. The chapter first explains how resistive sensors with a single, differential or bridge topology can be directly measured using a low-cost microcontroller. The uncertainty sources involved in the measurement (such as the mismatch of the internal resistances, quantisation and trigger noise) and the performance in some applications are reported. Next, the chapter deals with the direct connection of resistive sensor arrays to field-programmable gate arrays, where different resistances of the array are measured in parallel through a set of timers running simultaneously. The new uncertainty sources (mainly, crosstalk) and the applications are also reported. Although the proposed sensor interfaces are quite simple in terms of operating principle, their linearity and resolution are quite remarkable provided that the design rules indicated along this chapter are followed.
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References
R. Pallàs-Areny, J.G. Webster Sensors and Signal Conditioning, 2nd edn. (Wiley, New York, 2001)
J.H. Huising, Smart sensor systems: Why? Where? How?, in Smart Sensor Systems, ed. by G.C.M. Meijer (Wiley, Chichester (UK), 2008), pp. 1–21
F. Reverter, J. Jordana, M. Gasulla, R. Pallàs-Areny, Accuracy and resolution of direct resistive sensor-to-microcontroller interfaces. Sens. Actuators, A 121, 78–87 (2005)
F. Reverter, O. Casas, Interfacing differential resistive sensors to microcontrollers: a direct approach. IEEE Trans. Instrum. Meas. 58(10), 3405–3410 (2009)
E. Sifuentes, O. Casas, F. Reverter, R. Pallàs-Areny, Direct interface circuit to linearise resistive sensor bridges. Sens. Actuators, A 147, 210–215 (2008)
F. Reverter, O. Casas, Direct interface circuit for capacitive humidity sensors. Sens. Actuators, A 143, 315–322 (2008)
F. Reverter, O. Casas, Interfacing differential capacitive sensors to microcontrollers: a direct approach. IEEE Trans. Instrum. Meas. 59(10), 2763–2769 (2010)
F. Reverter, O. Casas, A microcontroller-based interface circuit for lossy capacitive sensors. Meas. Sci. Technol. 21 (065203), 8 pp (2010)
Z. Kokolanski, J. Jordana, M. Gasulla, V. Dimcev, F. Reverter, Direct inductive sensor-to-microcontroller interface circuit. Sens. Actuators, A 224, 185–191 (2015)
N. Ramadoss, B. George, A simple microcontroller based digitizer for differential inductive sensors, in Proceedings IEEE I2MTC, 11–14 May 2015, Pisa, Italy (2015), pp. 148–153
L. Bengtsson, Direct analog-to-microcontroller interfacing. Sens. Actuators A 179, 105–113 (2012)
F. Reverter, R. Pallàs-Areny, Direct Sensor-to-Microcontroller Interface Circuits. Design and Characterization (Marcombo, Barcelona, Spain, 2005)
F. Reverter, The art of directly interfacing sensors to microcontrollers. J. Low Power Electron. Appl. 2, 265–281 (2012)
F. Reverter, Power consumption in direct interface circuits. IEEE Trans. Instrum. Meas. 62(2), 503–509 (2013)
F. Reverter, J. Jordana, R. Pallàs-Areny, Internal trigger errors in microcontroller-based measurements, in Proceedings XVII IMEKO World Congress, 22–27 June 2003, Dubrovnik, Croatia (2003), pp. 655–658
F. Reverter, R. Pallàs-Areny, Uncertainty reduction techniques in microcontroller-based time measurements. Sens. Actuators, A 127, 74–79 (2006)
F. Reverter, M. Gasulla, R. Pallàs-Areny, Analysis of power-supply interference effects on direct sensor-to-microcontroller interfaces. IEEE Trans. Instrum. Meas. 56(1), 171–177 (2007)
G.C.M. Meijer, Interface electronics and measurement techniques for smart sensor systems, in Smart Sensor Systems, ed. by G.C.M. Meijer (Wiley, Chichester (UK), 2008), pp. 23–54
R.N. Ponnalagu, B. George, J. Kumar, A microcontroller sensor interface suitable for resistive sensors with large lead resistance, in Proceedings of the International Conference on Sensing Technology, 2–4 Sept 2014, Liverpool, UK (2014), pp. 327–331
E. Sifuentes, O. Casas, F. Reverter, R. Pallàs-Areny, Improved direct interface circuit for resistive full- and half-bridge sensors, in Proceedings ICEEE 2007, 5–7 Sept 2007, Mexico City, Mexico (2007), pp. 197–200
F. Reverter, G. Horak, V. Bilas, M. Gasulla, Novel and low-cost temperature compensation technique for piezoresistive pressure sensors, in Proceedings XIX IMEKO World Congress, 6–11 Sept 2009, Lisbon, Portugal (2009), pp. 2084–2087
F. Reverter, R. Pallàs-Areny, Effective number of resolution bits in direct sensor-to-microcontroller interfaces. Meas. Sci. Technol. 15, 2157–2162 (2004)
J. Jordana, R. Pallàs-Areny, A simple, efficient interface circuit for piezoresistive pressure sensors. Sens. Actuators, A 127, 69–73 (2006)
S.Y. Yurish, A simple and universal resistive-bridge sensors interface. Sens. Transducers J. 10, 46–59 (2011)
J. Courbat, D. Briand, L. Yue, S. Raible, N.F. Rooij, Drop-coated metal-oxide gas sensor on polyimide foil with reduced power consumption for wireless applications. Sens. Actuators, B 161, 862–868 (2012)
S. Knobelspies, B. Bierer, A. Ortiz Perez, J. Wöllenstein, J. Kneer, S. Palzer, Low-cost gas sensing system for the reliable and precise measurement of methane, carbon dioxide and hydrogen sulfide in natural gas and biomethane. Sens. Actuators B 236, 885–892 (2016)
E. Sifuentes, Sensor autónomo para detectar vehículos estáticos. Ph.D. thesis, Universitat Politècnica de Catalunya, Spain (2009) (in Spanish)
E. Sifuentes, J. Cota-Ruiz, R. González-Landaeta, Respiratory rate detection by a time-based measurement system. Revista Mexicana de Ingeniería Biomédica 37(2), 91–99 (2016)
L.C. Wang, K.T. Tang, C.T. Kuo, C.L. Ho, S.R. Lin, Y. Sung, C.P. Chang, Portable electronic nose system with chemiresistor sensors to detect and distinguish chemical warfare agents. J. Micro/Nanolith. MEMS MOEMS 9(3), 302–306 (2010)
M. Camara, F. Molina-Lopez, E. Danesh, G. Mattana, A. Bontempi, D. Teyssieux, L. Thiery, P. Breuil, C. Pijolat, K. Persaud, D. Briand, N.F. de Rooij, Printed micro-hotplates on flexible substrates for gas sensing, in Proceedings TRANSDUCERS’13, 16–20 July 2013, Barcelona, Spain (2013), pp. 1059–1062
T. D’Alessio, Measurement errors in the scanning of piezoresistive sensors arrays. Sens. Actuators, A 72, 71–76 (1999)
Ó. Oballe-Peinado, F. Vidal-Verdú, J.A. Sánchez-Durán, J. Castellanos-Ramos, J.A. Hidalgo-López, Smart capture modules for direct sensor-to-FPGA interfaces. Sensors 15(12), 31762–31780 (2015)
Ó. Oballe-Peinado, F. Vidal-Verdú, J.A. Sánchez-Durán, J. Castellanos-Ramos, J.A. Hidalgo-López, Improved circuits with capacitive feedback for readout resistive sensor arrays. Sensors 16(2), 149 (2016)
F. Vidal-Verdú, Ó. Oballe-Peinado, J.A. Sánchez-Durán, J. Castellanos-Ramos, R. Navas-González, Three realizations and comparison of hardware for piezoresistive tactile sensors. Sensors 11(3), 3249–3266 (2011)
Ó. Oballe-Peinado, F. Vidal-Verdú, J.A. Sánchez-Durán, J. Castellanos-Ramos, J.A. Hidalgo-López, Accuracy and resolution analysis of a direct resistive sensor array to FPGA interface. Sensors 16(2), 181 (2016)
Acknowledgements
This work has been partially funded by the Spanish Government and by the European ERDF program funds under contract TEC2015-67642-R.
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Reverter, F., Vidal-Verdú, F., Hidalgo-Lopez, J.A. (2017). Advanced Techniques for Directly Interfacing Resistive Sensors to Digital Systems. In: George, B., Roy, J., Kumar, V., Mukhopadhyay, S. (eds) Advanced Interfacing Techniques for Sensors . Smart Sensors, Measurement and Instrumentation, vol 25. Springer, Cham. https://doi.org/10.1007/978-3-319-55369-6_4
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