作者
Paolo Mantenuto, Andrea De Marcellis, Giuseppe Ferri
发表日期
2011/11/15
期刊
IEEE Sensors Journal
卷号
12
期号
5
页码范围
1413-1414
出版商
IEEE
简介
In this letter we present a simple analog interface for the automatic and continuous estimation of wide-range resistance variations of a sensor whose baseline is unknown. The proposed circuit topology, based on the Wheatstone bridge, is an uncalibrated configuration which employs suitable feedback blocks providing the bridge balancing condition through the substitution of one of the bridge resistors by means of a voltage controlled resistor capable to compensate sensor variations. Experimental results conducted on a PCB have shown that the proposed circuit is able to work for a wide resistive sensor base-line and/or for more than 3 decades of resistance variations (e.g., 300 Ω÷700 kΩ, the range is settable), showing a reduced relative error (lower than 1.5%).
学术搜索中的文章
P Mantenuto, A De Marcellis, G Ferri - IEEE Sensors Journal, 2011