A smart and accurate interface for resistive sensors

Author

Li, Xiujun ; Meijer, Gerard C M

Author_Institution

Fac. of Inf. Technol. & Syst., Delft Univ. of Technol., Netherlands

Volume

50

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

1648

Lastpage

1651

Abstract

This paper presents a smart and accurate interface for resistive sensors based on the use of a relaxation oscillator. To obtain high accuracy, good long-term stability and a reduction of the effects of interference and parasitic elements, some classical and new measurement techniques have been applied in the novel sensor interface. Moreover, all multiplicative and additive errors, and the common-mode effect of the interface are eliminated, using a multiple-signal calibration technique. A prototype has been built and was tested. Experimental results show that the interface is able to measure a resistance of 0 to 400 Ω, with a resolution of 7 mΩ and an accuracy of 11 mΩ. The measurement time is about 100 ms

Keywords

calibration; electric resistance measurement; electric sensing devices; intelligent sensors; measurement errors; relaxation oscillators; 0 to 400 ohm; 100 ms; additive error; common-mode effect; multiple-signal calibration; multiplicative error; relaxation oscillator; resistance measurement; resistive sensor; smart interface; Calibration; Electrical resistance measurement; Intelligent sensors; Interference; Measurement techniques; Oscillators; Prototypes; Stability; Testing; Time measurement;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.982961

Filename

982961