Time Domain Reflectometry Waveform Analysis with Second-Order Bounded Mean Oscillation

Date
2014-01-01
Authors
Wang, Zhuangji
Kojima, Yuki
Horton, Robert
Lu, Songtao
Chen, Yan
Horton, Robert
Schwartz, Robert
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Agronomy
Organizational Unit
Journal Issue
Series
Department
Agronomy
Abstract

Tangent-line methods and adaptive waveform interpretation with Gaussian filtering (AWIGF) have been proposed for determining reflection positions of time domain reflectometry (TDR) waveforms. However, the accuracy of those methods is limited for short-probe TDR sensors. Second-order bounded mean oscillation (BMO) may be an alternative method to determine reflection positions of short-probe TDR waveforms. For this study, an algorithm of second-order BMO is developed. Example waveforms are analyzed with tangent-line methods, AWIGF method, and second-order BMO to illustrate the difference among the three methods. For some waveforms, second-order BMO appears be able to give more plausible results. Automatic implementation was challenging for the second-order BMO. With second-order BMO, it is difficult to set a default threshold suitably for all TDR waveforms. Thus, manual adjustment may be required to select a suitable threshold for second-order BMO analysis

Comments

This article is published as Wang, Zhuangji, Yuki Kojima, Songtao Lu, Yan Chen, Robert Horton, and Robert C. Schwartz. "Time Domain Reflectometry Waveform Analysis with Second-Order Bounded Mean Oscillation." Soil Science Society of America Journal 78, no. 4 (2014): 1146-1152. doi: 10.2136/sssaj2013.11.0497. Posted with permission.

Description
Keywords
Citation
DOI
Collections