Study of climate and seasonal effects on soil properties by a nonlinear acoustic technique: the phase shift method

Zhiqu Lu; James M. Sabatier

doi:10.1117/12.666004

17 May 2006 Study of climate and seasonal effects on soil properties by a nonlinear acoustic technique: the phase shift method

Zhiqu Lu, James M. Sabatier

Author Affiliations +

Proceedings Volume 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI; 621719 (2006) https://doi.org/10.1117/12.666004
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

In this study, a new nonlinear acoustic technique, the phase shift method, is developed to measure the hysteretic nonlinearity parameter for a field soil. The technique is based on measuring the variation of phase difference between two transducers, i.e. the phase shift, induced by changing sound level. The hysteretic nonlinear parameter can be extracted from the measured phase shift as a function of sound level, or dynamic strain. With this technique, a long-term soil survey is conducted to study the variations of soil properties due to climate and seasonal changes. The hysteretic nonlinear parameter and sound speed of the soil as functions of temperature, moisture, surface tension, rain precipitation, and time are studied.

Citation Download Citation

Zhiqu Lu and James M. Sabatier "Study of climate and seasonal effects on soil properties by a nonlinear acoustic technique: the phase shift method", Proc. SPIE 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI, 621719 (17 May 2006); https://doi.org/10.1117/12.666004

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