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Optimal sensor configuration for ultrasonic guided-wave inspection based on value of information


Sergio Cantero-Chinchilla



Dimitrios Chronopoulos

Arthur Jones


Condition-based maintenance critically relies on efficient and reliable structural health monitoring systems, where the number, position and type of sensors are determined according to rational and principled criteria. This paper proposes the use of the value of information and the relative expected information gain as optimality criteria to determine the best number and positions of sensors, respectively. The proposed methodology is general, but in this paper it is specialized for ultrasonic guided-wave optimal system configuration. Two case studies are used to illustrate the suitability of the proposed methodology in providing the optimal sensor configuration of an ultrasonic guided-wave based structural health monitoring system. The results confirm the value of information as an efficient and rational index to compare among different sensor positioning strategies, while accounting for the underlying modeling and measurement uncertainties. As key contribution, a novel framework that trades-off between amount and cost of information is provided. The results show that geometrically unconstrained sensor configurations are preferred, since they provide a healthier balance between the amount of information and the benefit of such information.


Cantero-Chinchilla, S., Chiachío, J., Chiachío, M., Chronopoulos, D., & Jones, A. (2020). Optimal sensor configuration for ultrasonic guided-wave inspection based on value of information. Mechanical Systems and Signal Processing, 135, Article 106377.

Journal Article Type Article
Acceptance Date Sep 14, 2019
Online Publication Date Oct 9, 2019
Publication Date Jan 1, 2020
Deposit Date Oct 9, 2019
Publicly Available Date Oct 10, 2020
Journal Mechanical Systems and Signal Processing
Print ISSN 0888-3270
Electronic ISSN 1096-1216
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 135
Article Number 106377
Series ISSN 0888-3270
Keywords Optimal sensor configuration; Value of information; Bayesian inverse problem; Ultrasound; Time of flight; SHM
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Additional Information This article is maintained by: Elsevier; Article Title: Optimal sensor configuration for ultrasonic guided-wave inspection based on value of information; Journal Title: Mechanical Systems and Signal Processing; CrossRef DOI link to publisher maintained version:; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved.


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