Title :
A low-cost interface to high-value resistive sensors varying over a wide range
Author :
Flammini, A. ; Marioli, D. ; Taroni, A.
Author_Institution :
Dept. of Electron. for Autom., Univ. of Brescia, Italy
Abstract :
This paper presents a low-cost interface for high-value resistive sensors varying over a wide range, from kΩ to GΩ. The proposed circuit that acts as a "resistance to period converter" is suitable to be interfaced to a microcontroller or a counting device. The behavior of real electronic components that produce estimation errors, is taken into account. Experimental results obtained by the realized prototype show a good resolution and repeatability.
Keywords :
electrochemical sensors; analog processing circuits; chemical transducers; counting device; electronic component behavior; electronic equipment; estimation errors; high-value resistive sensors; low-cost interface; microcontroller; oscillators; period converter; repeatability; resistance measurement; resolution; wide resistance range; Calibration; Chemical sensors; Electronic circuits; Frequency; Instruments; Microcontrollers; Sensor arrays; Temperature sensors; Time measurement; Voltage; Resistance measurement; analog processing circuits; chemical transducers; electronic equipment; oscillators;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2004.831500
