A New Real-Time SHM System Embedded on Raspberry Pi

de Oliveira, Mario A. and Nascimento, Raul and Brandao, Douglas (2022) A New Real-Time SHM System Embedded on Raspberry Pi. In: EWSHM 2022: European Workshop on Structural Health Monitoring, 4th - 7th July 2022, Palermo, Italy.

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This paper outlines the development of a real-time monitoring system, which incorporates hardware, software and database, applied to structural health monitoring (SHM). The system was conceived, designed, implemented and embedded on Raspberry Pi 3 (RP). With the need for reliability and information being provided in real time (IoT), RP has tightly integrated into the SHM field. To accomplish that, we developed an acquisition system based on Pmod IA (AD5933) along with the multiplex 4066, used to switch among the piezoelectric transducers. Furthermore, a real-time web application was developed to manage the acquisition system, integrate hardware with software and store the data collected in a dedicated NoSQL database. To perform excitation and get the structural response signals, experiments were carried out based on the electromechanical impedance technique by using three PZTs glued into an aluminium structure. Sinusoidal excitation signals, ranging from 20 kHz to 30 kHz with an amplitude of 2 V, were applied to the host structure. Overall, the reference system presented higher sensitivity for the RMSD metric, whilst the proposed system showed more relevance for damage detection via CCDM. Despite being implemented in low-cost hardware, the developed system identified structural failures with good reliability, being advantageous from both financial and dimension standpoints.

Item Type: Conference or Workshop Item (Paper)
Identification Number: https://doi.org/10.1007/978-3-031-07254-3_40
1 June 2022Accepted
19 June 2022Published Online
Uncontrolled Keywords: EMI, PZT, Database, software-hardware integration, IoT
Subjects: CAH10 - engineering and technology > CAH10-01 - engineering > CAH10-01-01 - engineering (non-specific)
Divisions: Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Dept. of Engineering
Depositing User: Gemma Tonks
Date Deposited: 03 Jan 2024 14:51
Last Modified: 03 Jan 2024 14:51
URI: https://www.open-access.bcu.ac.uk/id/eprint/15076

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