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The Coreless Inductive Sensor for Strain Measurement of Rock Samples in a Pressure Cell... |
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The Coreless Inductive Sensor for Strain Measurement of Rock Samples in a Pressure Cell – some Advantages and Disadvantages in Relation to the ElectricalResistance Strain Gauges Author: J. Nurkowski
This paper presents a sensor for measuring strains ranging from below 0.1% to over 50%, which is
considered as the one-ply coreless inductor. This sensor is used mainly for measuring the compressibility
of rock samples in a triaxial cell under hydrostatic pressure up to 1 GPa, in the case when it is diffi cult or
impossible to use a resistance strain gauge. Moreover, the paper describes the electronic system working
with the sensor and discusses the infl uence of temperature and high pressure on the sensor properties.
To conclude, some problems referring to the application of the referential resistance strain gauge in
a pressure cell are discussed. |
2011