Historical heritage buildings represent an asset to be preserved for both their particular historical interest and their specific structural problems. In particular this kind of structures are composed by different material and realization techniques; in several cases it is not possible to modify the structure to permit the installation of modern strengthening techniques, or this possibility is strongly limited. By the way, it is necessary to monitor the structural health of such buildings and the monitoring must be performed with continuous techniques. In fact, critical damages for such structures can be obtained as the sum of minor damages accumulated diring time. Moreover, also the source of these damages can be different such as the aging, structural load and so on.For this reason in this paper the design of a SHM System for historical buildings is proposed. The main features of the proposed system is to be non-invasive or low-invasive. This characteristic is obtained by the acquisition of the acoustic emission generated by the compression or stress of the structures, and by designing of a monitoring system with low power consumption and with the possibility of being partly powered, in some of its components, by renewable energy sources. In fact, the proposed system consist of several sensor nodes that monitor the acoustic emission in different points of the structure. The sensor nodes being distributed throughout the surface of the structure could have electrical power problems. For this reason, they must be designed with low power consumption, in order to be powered by a battery, and with the possibility of being recharged by renewable energy sources, such as photovoltaic panels. The sensor nodes communicate with a central elaboration unit that analyses the data and detects the critical events. In addition, the communication standard considered in the design of the monitoring system is a low power one, in particular, LoRaWAN standard is used.In conclusions, the design of the system is detailed with particular attention to the power consumption and the power generated by the photovoltaic panels with appropriate simulations.

Non-Invasive Monitoring System for Historical Building

Paper Proceedings: https://asmedigitalcollection.asme.org/qnde/QNDE2021/volume/85529

ASME 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE2021)

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