Published

2012-05-01

Sand's electrical parameters vary with frequency

Variación de los parámetros eléctricos de la arena con la frecuencia

Keywords:

Soil measurement, impedance measurement, permittivity measurement, resistivity variation, impulse testing, transient response (en)
mediciones del terreno, medición de impedancia, medición de permitividad, variación de resistividad, prueba de impulso, respuesta transitoria (es)

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Authors

  • Johny Hernan Montaña Chaparro Universidad del Norte
  • John Edwin Candelo Becerra Universidad del Norte
  • Oscar Germán Duarte Velasco Universidad Nacional de Colombia

This paper presents the results of two types of test in one kind of sand to obtain resistivity and permittivity values for frequency ranging from Hz to MHz. One test involved wave generation at specific frequencies and the other an impulse generator (continuous frequency spectrum). Tests were made for three humidity values. The results of both test revealed non-linear performance on test electrode surface. Such non-linearity was modelled and eliminated to give the permittivity and resistivity values in frequency domain.

Este artículo presenta los resultados de dos tipos de pruebas hechas a una clase de arena para obtener los valores de resistividad y permitividad eléctricas en el rango de los Hz hasta los MHz. Una de las pruebas fue realizada a frecuencias específicas con un generador de señales, y la otra fue hecha con un generador de impulsos de tensión, con lo cual se trabajó un espectro continuo de frecuencias. Las pruebas se llevaron a cabo para tres valores de humedad, y los resultados de ambas mostraron un comportamiento no lineal presente en la superficie de los electrodos de prueba. Esta no linealidad fue modelada y considerada en el procedimiento de cálculo de los valores de permitividad y resistividad en el dominio de la frecuencia. Finalmente, se señalan los resultados, las conclusiones y el trabajo futuro.

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Copyright (c) 2012 Oscar Germán Duarte Velasco, John Edwin Candelo Becerra, Johny Hernan Montaña Chaparro

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