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The use of hall effect semiconductors in geotechnical instrumentation

The use of hall effect semiconductors in geotechnical instrumentation
The use of hall effect semiconductors in geotechnical instrumentation
For the past five years or so Hall effect semiconductors have been increasingly used in the geotechnical engineering laboratories at the University of Surrey. They have been incorporated as sensing elements in local radial and axial strain measuring devices, for the small-strain instrumentation of triaxial specimens, and in small diameter boundary normal and shear stress cells. Triaxial internal load cells are currently being built incorporating Hall effect semiconductors.

This paper describes the Hall effect principle and the methods of configuring magnet/sensor systems to achieve suitable measuring systems. Some geotechnical instruments built at the University of Surrey are detailed, and their characteristics discussed. The calibrations of the instruments described in the paper show a performance generally at least as good as might be expected from some commercially available instruments. Hall effect semiconductors are shown to be of use in a range of situations where displacement can form the basis of measurement. The displacements measured can vary from as little as 5 µm to as much as 10 mm, and the best repeatability so far obtained has been of the order of 1/100 of a micrometre.

instrumentation, strain, stress, calibrations, errors, triaxial tests, deformation gages, pressure cells
0149-6115
69-76
Clayton, C. R. I.
8397d691-b35b-4d3f-a6d8-40678f233869
Khatrush, S.A.
77c264a4-335a-4a82-b022-4419bf7aa799
Bica, A.V.D
0c884221-c53b-46fd-8300-3e5d006ebde5
Siddique, A.
e0e45f72-cb50-48e9-8fd7-02e2f6ca8cc9
Clayton, C. R. I.
8397d691-b35b-4d3f-a6d8-40678f233869
Khatrush, S.A.
77c264a4-335a-4a82-b022-4419bf7aa799
Bica, A.V.D
0c884221-c53b-46fd-8300-3e5d006ebde5
Siddique, A.
e0e45f72-cb50-48e9-8fd7-02e2f6ca8cc9

Clayton, C. R. I., Khatrush, S.A., Bica, A.V.D and Siddique, A. (1989) The use of hall effect semiconductors in geotechnical instrumentation. Geotechnical Testing Journal, 12 (1), 69-76. (doi:10.1520/GTJ10676J).

Record type: Article

Abstract

For the past five years or so Hall effect semiconductors have been increasingly used in the geotechnical engineering laboratories at the University of Surrey. They have been incorporated as sensing elements in local radial and axial strain measuring devices, for the small-strain instrumentation of triaxial specimens, and in small diameter boundary normal and shear stress cells. Triaxial internal load cells are currently being built incorporating Hall effect semiconductors.

This paper describes the Hall effect principle and the methods of configuring magnet/sensor systems to achieve suitable measuring systems. Some geotechnical instruments built at the University of Surrey are detailed, and their characteristics discussed. The calibrations of the instruments described in the paper show a performance generally at least as good as might be expected from some commercially available instruments. Hall effect semiconductors are shown to be of use in a range of situations where displacement can form the basis of measurement. The displacements measured can vary from as little as 5 µm to as much as 10 mm, and the best repeatability so far obtained has been of the order of 1/100 of a micrometre.

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More information

Published date: March 1989
Keywords: instrumentation, strain, stress, calibrations, errors, triaxial tests, deformation gages, pressure cells
Organisations: Civil Engineering & the Environment

Identifiers

Local EPrints ID: 75007
URI: http://eprints.soton.ac.uk/id/eprint/75007
ISSN: 0149-6115
PURE UUID: 51ae048f-969b-4807-8b82-3d3a74ab147e
ORCID for C. R. I. Clayton: ORCID iD orcid.org/0000-0003-0071-8437

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 24 May 2019 00:37

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