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Monitoring soil moisture is a major interest for several practical applications, and this task can be suitably performed through various methods. Although extensive literature deals with the adoptions of standard systems (many of which are commercially available), the state of the art is lacking in a rigorous validation of specific systems, such as those based on the seismic wave propagation (SWP)...
The main purpose of the present work is to design and build a prototype system based on seismic sensors for the measurement of the degree of saturation in unconsolidated granular mediums. In previous papers (F. Adamo et al., 2004), (F. Adamo et al., 2006) the authors have described the theoretical analysis necessary to estimate the degree of soil saturation which is obtained by measuring the propagation...
In this paper the design and the development of a moisture sensor for granular and porous mediums are presented. In the proposed method the moisture is measured by estimating the velocity of propagation of seismic waves (both compressional and shear ones) between a transmitter and a receiver separated by a known distance. The first experimental results are illustrated and compared with theoretical...
In this paper the design and the development of an innovative soil moisture sensor for agricultural applications is presented; also the first experimental results are illustrated and compared with those deriving by the underlying theory. The basic idea is to excite the soil with seismic waves (both compressional and shear ones) and to measure their velocity of propagation using a transmitter and a...
A new static test for DC digital instruments and analog-to-digital converters is presented. The test is truly static because it uses only DC voltages with a small superimposed noise. It is much faster than the one described in IEEE standard 1057/94, since it uses a minimal number of input signals and acquired samples in a theoretically nearly optimal manner (ML estimation). Besides, contrary to the...
This paper deals with the problem of measuring the moisture of agricultural soils by an accurate theoretical method valid for different kinds of soils in different physical conditions. In this work we propose a theoretical analysis based on the propogation of seismic waves in a complex medium as the agricultural soil is Particularly we prove that the use of both compressional and shear waves simplifies...
This paper deals with the problem of measuring the moisture of agricultural soils by an accurate theoretical method valid for different kinds of soils in different physical conditions. In this work we propose a theoretical analysis based on the propagation of seismic waves in a complex medium as the agricultural soil is. Particularly we prove that the use of both compressional and shear waves simplifies...
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