A CONSTANT TEMPERATURE OPERATION THERMORESISTIVE SIGMA-DELTA SOLAR RADIOMETER

Amauri Oliveira, Lígia S. Palma, Alexandre S. Costa, Raimundo C. S. Freire, Antônio C. C. Lima

Abstract

In this paper we propose a feedback system, with thermo-resistive sensor, based on sigma-delta modulation. The system uses a one-bit sigma-delta modulator in which considerable part of conversion functions is performed by a thermoresistive sensor. The sensor is modelled using the power balance principle and the applied measurement method is constant temperature. This transducer architecture is able to realize digital measurement of physical quantities that interacts with the sensor: temperature, thermal radiation and fluid velocity. This paper presents simulations results of this system applied to thermal radiation measurement.

Keywords

thermoresistive sensor, measurement, sigma-delta modulation

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IMEKO-TC7-2004-021.pdf

DOI

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IMEKO TC

TC7 - Measurement Science

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