Campus Units
Agricultural and Biosystems Engineering
Document Type
Conference Proceeding
Publication Version
Published Version
Publication Date
2016
DOI
10.13031/aim.20162460299
Conference Title
2016 ASABE Annual International Meeting
Conference Date
July 17–20, 2016
City
Orlando, FL, United States
Abstract
Ground Penetrating Radar (GPR) is an electromagnetic (EM) signal based technology, commonly used as a non-destructive technique to explore subsurface features and identify different depth profiles in materials. The overall goals of this work is to evaluate GPR for non-destructive mapping of seed planting depth. Soils are inherently complex materials and numerous factors affect GPR behavior. The fundamental factors affecting GPR response are dielectric permittivity, magnetic permeability, and electrical conductivity, which are influenced by soil bulk density, texture, salinity, organic matter, volumetric water content, seed properties and physical geometry. To successfully optimize GPR’s ability to detect seed planting depth, the influence of these factors must be evaluated. This paper describes the development of a single dimensional GPR simulation model, based on finite difference time domain (FDTD) method, to evaluate the use of GPR sensing of seed planting depth. The simulation results shows that the EM signal is highly sensitive to high values of the electrical conductivity. High permittivity values decrease the EM signal velocity, wavelength and strength. A combination of these two properties leads to a significant EM signal attenuation ranging from 0 to ~ 800 dBm-1 as the signal traverses through the soil and seed. The lack of sufficient dielectric contrast between soil and seed presents a challenge on the detectability of the reflected signal by the radar receiver, therefore a sufficient dielectric contrast between the soil and seed has to be present to allow the GPR to be a viable tool to map the seed planting depth.
Copyright Owner
American Society of Agricultural and Biological Engineers
Copyright Date
2016
Language
en
File Format
application/pdf
Recommended Citation
Mapoka, Kenneth O. M.; Birrell, Stuart J.; and Tekeste, Mehari, "Modeling Ground Penetrating Radar (GPR) Technology for Seed Planting Depth Detection using Numerical Scheme based on Finite Difference Time Domain (FDTD) Method" (2016). Agricultural and Biosystems Engineering Conference Proceedings and Presentations. 481.
https://lib.dr.iastate.edu/abe_eng_conf/481
Comments
This paper is from 2016 ASABE Annual International Meeting, Paper No. 162460299, pages 1-17 (doi: 10.13031/aim.20162460299). St. Joseph, Mich.: ASABE. Posted with permission.