Compton scattering tomography for agricultural measurements

Engenharia Agrícola

Paulo E. Cruvinel²  Fatai A. Balogun¹ 

[1] ,Embrapa Agricultural Instrumentation

关键词: Compton tomography;    soil density and moisture;    agricultural automation;    tomografia Compton;    densidade e umidade de solo;    automação agrícola;   

DOI  :  10.1590/S0100-69162006000100017

来源: SciELO

【 摘 要 】

This paper presents a new approach in tomographic instrumentation for agriculture based on Compton scattering, which allows for the simultaneous measurements of density and moisture of soil samples. Compton tomography is a technique that can be used to obtain a spatial map of electronic density of samples. Quantitative results can be obtained by using a reconstruction algorithm that takes into account the absorption of incident and scattered radiation. Results show a coefficient of linear correlation better than 0.81, when comparison is made between soil density measurements based on this method and direct transmission tomography. For soil water contents, a coefficient of linear correlation better than 0.79 was found when compared with measurements obtained by time domain reflectrometry (TDR). In addition, a set of Compton scatter images are presented to illustrate the efficacy of this imaging technique, which makes possible improved spatial variability analysis of pre-established planes.

【 授权许可】

CC BY   
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