PSI - Issue 84

Francesco Mariani et al. / Procedia Structural Integrity 84 (2026) 773–780

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Finally, environmental conditions are tracked using ten temperature and humidity sensors integrated into an Arduino-based acquisition system. These ten environmental channels, sampled at 1 Hz, support the interpretation of long-term structural trends and the compensation of thermally induced effects on the measured structural response.

Fig. 2. Location of sensors

Fig. 3. Time histories of temperature and humidity.

Figure 3 shows the time histories of (a) temperature and (b) relative humidity measured by the sensors during the monitoring period from October 2025 to January 2026. The temperature data recorded by the different sensors (T1– T10) exhibit a consistent trend, characterized by daily fluctuations and a gradual decrease over time, in agreement