Microcontroller-based interface circuit for inductive sensors
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10.1016/j.proeng.2014.11.411
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/27327
Tipus de documentAltres
Data publicació2014
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
This work proposes a fully-digital interface circuit for the measurement of inductive sensors using a low-cost microcontroller (µC) and without any intermediate active circuit. Apart from the µC and the sensor, the circuit just requires an external resistor and a reference inductance so that two RL circuits with a high-pass filter (HPF) topology are formed. The µC appropriately excites such RL circuits in order to measure the discharging time of the voltage across each inductance (i.e. sensing and reference) and then it uses such discharging times to estimate the sensor inductance. Experimental tests using a commercial µC show a non-linearity error (NLE) lower than 0.5%FSS (Full-Scale Span) when measuring inductances from 1 mH to 10 mH, and from 10 mH to 100 mH.
CitacióKokolanski, Z. [et al.]. Microcontroller-based interface circuit for inductive sensors. A: Eurosensors. "Procedia Engineering". Brescia: 2014, p. 1251-1254.
ISSN1877-7058
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S1877705814025260
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