Imperial College London
Alternate

Dr Tom Reddyhoff

Faculty of Engineering, Department of Mechanical Engineering

Reader in Tribology
 
 
 
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Contact

 

+44 (0)20 7594 3840t.reddyhoff Website

 
 
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Location

 

670City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Yu:2021:10.1109/JSEN.2021.3106806,
author = {Yu, M and Reddyhoff, T and Dini, D and Holmes, A and O'Sullivan, C},
doi = {10.1109/JSEN.2021.3106806},
journal = {IEEE Sensors Journal},
pages = {22489--22498},
title = {Using ultrasonic reflection resonance to probe stress wave velocity in assemblies of spherical particles},
url = {http://dx.doi.org/10.1109/JSEN.2021.3106806},
volume = {21},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A high-sensitivity method to measure acousticwave speed in soils by analyzing the reflected ultrasonic signalfrom a resonating layered interface is proposed here.Specifically, an ultrasonic transducer which can be used to bothtransmit and receive signals is installed on a low-high acousticimpedance layered structure of hard PVC and steel, which in turnis placed in contact with the soil deposit of interest. The acousticimpedance of the soil (the product of density and wave velocity)is deduced from analysis of the waves reflected back to thetransducer. A system configuration design is enabled bydeveloping an analytical model that correlates the objectivewave speed with the measurable reflection coefficient spectrum.The physical viability of this testing approach is demonstratedby means of a one-dimensional compression device that probesthe stress-dependence of compression wave velocity of differentsizes of glass ballotini particles. Provided the ratio of thewavelength of the generated wave to the soil particle size issufficiently large the data generated are in agreement with dataobtained using conventional time-of-flight measurements. Inprinciple, this high-sensitivity approach avoids the need for thewave to travel a long distance between multiple transmitterreceiver sensors as is typically the case in geophysical testingof soil. Therefore it is particularly suited to in-situ observation ofsoil properties in a highly compact setup, where only a single transducer is required. Furthermore, high spatialresolution of local measurements can be achieved, and the data are unaffected by wave attenuation as transmitted insoil.
AU  - Yu,M
AU  - Reddyhoff,T
AU  - Dini,D
AU  - Holmes,A
AU  - O'Sullivan,C
DO  - 10.1109/JSEN.2021.3106806
EP  - 22498
PY  - 2021///
SN  - 1530-437X
SP  - 22489
TI  - Using ultrasonic reflection resonance to probe stress wave velocity in assemblies of spherical particles
T2  - IEEE Sensors Journal
UR  - http://dx.doi.org/10.1109/JSEN.2021.3106806
UR  - https://ieeexplore.ieee.org/document/9520366
UR  - http://hdl.handle.net/10044/1/91132
VL  - 21
ER  -
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