Cargando…
Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces
The knowledge of the acoustic impedance of a material allows for the calculation of its acoustic absorption. Impedance can also be linked to structural and physical proprieties of materials. However, while the impedance of pavement samples in laboratory conditions can usually be measured with high a...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085634/ https://www.ncbi.nlm.nih.gov/pubmed/32106391 http://dx.doi.org/10.3390/s20051239 |
_version_ | 1783508976897359872 |
---|---|
author | Bianco, Francesco Fredianelli, Luca Lo Castro, Fabio Gagliardi, Paolo Fidecaro, Francesco Licitra, Gaetano |
author_facet | Bianco, Francesco Fredianelli, Luca Lo Castro, Fabio Gagliardi, Paolo Fidecaro, Francesco Licitra, Gaetano |
author_sort | Bianco, Francesco |
collection | PubMed |
description | The knowledge of the acoustic impedance of a material allows for the calculation of its acoustic absorption. Impedance can also be linked to structural and physical proprieties of materials. However, while the impedance of pavement samples in laboratory conditions can usually be measured with high accuracy using devices such as the impedance tube, complete in-situ evaluation results are less accurate than the laboratory results and is so time consuming that a full scale implementation of in-situ evaluations is practically impossible. Such a system could provide information on the homogeneity and the correct laying of an installation, which is proven to be directly linked to its acoustic emission properties. The present work studies the development of a measurement instrument which can be fastened through holding elements to a moving laboratory (i.e., a vehicle). This device overcomes the issues that afflict traditional in-situ measurements, such as the impossibility to perform a continuous spatial characterization of a given pavement in order to yield a direct evaluation of the surface’s quality. The instrumentation has been uncoupled from the vehicle’s frame with a system including a Proportional Integral Derivative (PID) controller, studied to maintain the system at a fixed distance from the ground and to reduce damping. The stabilization of this device and the measurement system itself are evaluated and compared to the traditional one. |
format | Online Article Text |
id | pubmed-7085634 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70856342020-04-21 Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces Bianco, Francesco Fredianelli, Luca Lo Castro, Fabio Gagliardi, Paolo Fidecaro, Francesco Licitra, Gaetano Sensors (Basel) Article The knowledge of the acoustic impedance of a material allows for the calculation of its acoustic absorption. Impedance can also be linked to structural and physical proprieties of materials. However, while the impedance of pavement samples in laboratory conditions can usually be measured with high accuracy using devices such as the impedance tube, complete in-situ evaluation results are less accurate than the laboratory results and is so time consuming that a full scale implementation of in-situ evaluations is practically impossible. Such a system could provide information on the homogeneity and the correct laying of an installation, which is proven to be directly linked to its acoustic emission properties. The present work studies the development of a measurement instrument which can be fastened through holding elements to a moving laboratory (i.e., a vehicle). This device overcomes the issues that afflict traditional in-situ measurements, such as the impossibility to perform a continuous spatial characterization of a given pavement in order to yield a direct evaluation of the surface’s quality. The instrumentation has been uncoupled from the vehicle’s frame with a system including a Proportional Integral Derivative (PID) controller, studied to maintain the system at a fixed distance from the ground and to reduce damping. The stabilization of this device and the measurement system itself are evaluated and compared to the traditional one. MDPI 2020-02-25 /pmc/articles/PMC7085634/ /pubmed/32106391 http://dx.doi.org/10.3390/s20051239 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bianco, Francesco Fredianelli, Luca Lo Castro, Fabio Gagliardi, Paolo Fidecaro, Francesco Licitra, Gaetano Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title | Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title_full | Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title_fullStr | Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title_full_unstemmed | Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title_short | Stabilization of a p-u Sensor Mounted on a Vehicle for Measuring the Acoustic Impedance of Road Surfaces |
title_sort | stabilization of a p-u sensor mounted on a vehicle for measuring the acoustic impedance of road surfaces |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7085634/ https://www.ncbi.nlm.nih.gov/pubmed/32106391 http://dx.doi.org/10.3390/s20051239 |
work_keys_str_mv | AT biancofrancesco stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces AT fredianelliluca stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces AT locastrofabio stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces AT gagliardipaolo stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces AT fidecarofrancesco stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces AT licitragaetano stabilizationofapusensormountedonavehicleformeasuringtheacousticimpedanceofroadsurfaces |