A novel method for the simultaneous measurement of temperature and strain using a three-wire connection

A novel methodology to simultaneously measure strain and temperature is proposed. It consists of an electrical resistance strain gauge powered by an AC signal and connected to a strain indicator by means of thermocouple wires. Experimental validation of this method was carried out by a purely electr...

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Bibliographic Details
Published in:Measurement science & technology 2001-04, Vol.12 (4), p.502-506
Main Authors: Cappa, Paolo, Marinozzi, Franco, Sciuto, Salvatore Andrea
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instruments for strain, force and torque
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mechanical instruments, equipment and techniques
Physics
Thermal instruments, apparatus and techniques
Thermometry
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Summary:A novel methodology to simultaneously measure strain and temperature is proposed. It consists of an electrical resistance strain gauge powered by an AC signal and connected to a strain indicator by means of thermocouple wires. Experimental validation of this method was carried out by a purely electrical simulation of both strain and temperature signals, respectively from -2000 to 2000 micro m(super-1) and -250 to 230\0\C. The results obtained showed that strain measurement is affected by an error of less than +or-2 micro m(super-1) for the whole range of simulated strains; the error in temperature evaluation is less than 0.6\0\C. The effect of cross-talk between the 2 signals was insignificant. (Original abstract)
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/12/4/315