A measurement system to automate laboratory testing in soils

Author

Ramos, Helena Geirinhas ; Trindade, Mário ; Serra, A. Cruz

Author_Institution

Centro de Electrotecnia Teorica e Medidas Electr., Tech. Univ. Lisbon, Portugal

Volume

2

fYear

1997

fDate

19-21 May 1997

Firstpage

1048

Abstract

This paper presents a personal computer (PC) based system to automate laboratory testing of soils. The output voltages from eight transducers that measure displacements in specimen under oedometer tests are conditioned and measured by the system. Another transducer is used to measure the load applied to a specimen on a direct shear-box apparatus using a load ring. Severe restrictions are imposed to the system, not only on the accuracy (in oedemeter test full scale displacement is 10 mm and the required resolution is 0.002 mm) but also on stability with the time and temperature, since the measurement procedure can take up to one week

Keywords

automatic test equipment; automatic testing; calibration; compressibility; displacement measurement; geophysical techniques; mechanical variables measurement; microcomputer applications; soil; transducers; 10 mm; analog multiplexer; calibration; direct shear-box apparatus; displacement transducer; laboratory testing; load ring; oedometer tests; soils; stability; Automatic testing; Displacement measurement; Laboratories; Microcomputers; Soil measurements; Stability; System testing; Temperature measurement; Transducers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE

Conference_Location

Ottawa, Ont.

ISSN

1091-5281

Print_ISBN

0-7803-3747-6

Type

conf

DOI

10.1109/IMTC.1997.612360

Filename

612360