Universal Asynchronous Sensor Interfaces

• Autorzy: Meijer G.
• Języki publikacji: EN

Abstrakty

EN

Sensor interfaces should provide an output signal that can be read out by a microcontroller. This paper shows, that besides digital output signals also time-modulated signals are suited to be read out by microcontrollers. It is shown, that the attractive features of time-modulated signals concern the simplicity of the circuits and the flexibility of the signal processing. It is shown that precision interface chips can be implemented with low-cost CMOS technology. To make the interface chips universal, specific physical problems for typical applications and measurements have been taken into account. Interface chips in which dedicated measurement techniques have been applied, including autocalibration, two-port measurement and advanced chopping, can be very users friendly. Moreover, these techniques enable selective detection of the measurand with a high immunity for parasitic effects of the sensing elements, and for the effects of the connecting wires. As case studies, interface systems have been presented for capacitive sensors, resistive-bridge sensors.

Słowa kluczowe

EN

smart sensor systems; sensor interfaces; smart sensors; asynchronous interfaces

• Wydawca: Wydawnictwo PAK
• Czasopismo: Pomiary Automatyka Kontrola
• Rocznik: 2007
• Tom: R. 53, nr 9 bis
• Strony: 1--8
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wzory

Twórcy

autor

Meijer G.

• TU Delft, Faculty EWI, Mekelweg 4, 2628 CD Delft, The Netherlands

Bibliografia

• [1] Analog Devices (2006). LC2MOS Signal Conditioning ADC with RTD excitation currents.
• [2] Maxim (2006). "MAX1452 Low-cost, precision sensor signal conditioner".
• [3] Melexis (2006). "MLX90314 High gain programmable sensor interface".
• [4] Triad Semiconductor (2004). Universal smart sensor interface.
• [5] Smartec (2006). "www.smartec.nl. Data sheet Universal Transducer Interface UTI".
• [6] van der Goes, F. M. L. and Meijer, G. C. M.. "A universal transducer interface for capacitive and resistive sensor elements", Kluwer, Analog Integrated Circuits and Signal Processing, Vol. 14, 1997, pp. 249-260.
• [7] Quiquempoix V., Deval P., Barretto A., Bellinn G., Markus J., Silva J. and Temes, G. (2006). "A low-power 22-bit incremental ADC", Solid-State Circuits, IEEE Journal of, 41, 1562-1571.
• [8] Jespers, P. G. A. (2001). Integrated Converters, Oxford, Oxford University Press.
• [9] van der Goes. F. M. L. (1996). Low-cost smart sensor interfacing, PhD thesis. TUDelft The Netherlands.
• [10] Pertijs, M. A. P. (2005). Precision Temperature Sensors in CMOS technology, PhD. Delft University of Technology.
• [11] de Jong. P. C. Meijer, G. C. M. and van Roermund. A. H. M. (1996). "A new dithering method for sigma-delta modulators". Analog Integrated Circuits and Signal Processing, 10, 193-204.
• [12] Li, X. J. and Meijer, G. C. M. (2002). "An accurate interface for capacitive sensors". IEEE Transactions on Instrumentation and Measurement, 51, 935-939.
• [13] van der Goes, F. M. L. and Meijer, G. C. M. (1997). "A universal transducer interface for capacitive and resistive sensor elements". Analog Integrated Circuits and Signal Processing, 14, 249-260.
• [14] de Jong. P. C. and Meijer, G. C. M. (1997). "Absolute voltage amplification using dynamic feedback control". Instrumentation and Measurement, IEEE Transactions on, 46, 758.