Abstract
This paper presents an envisaged autonomous strain sensor device, which is dedicated to structural health monitoring applications. The paper introduces the ASIC approach that replaces the discrete approach of some of the main modules.
Highlights
The proposed device is developed in the frame of the SMARTER (Smart Multifunctional Architecture & Technology for Energy-Aware wireless sensor) Project [1].The device is self-powered, based on a piezoelectric transducer as an energy-harvesting source, enabling a battery-free solution
The system would be capable to sense the mechanical strain, which is an interesting topic in structural health monitoring applications, in the aerospace field, which is the present field of application, defining the frequencies available for the transducer, harvesting the energy provided by the in-flight vibration of the aircraft’s wing [2]
On the one hand, based on a piezoelectric transducer, the mechanical vibrations are harvested to generate electrical energy, in order to start-up and supply the system, but on the other hand, the system is capable to extract the open voltage (VOC) of the piezoelectric harvester, which has a relationship with the mechanical strain [3]
Summary
The proposed device is developed in the frame of the SMARTER (Smart Multifunctional Architecture & Technology for Energy-Aware wireless sensor) Project [1].The device is self-powered, based on a piezoelectric transducer as an energy-harvesting source, enabling a battery-free solution. The nice approach of the device, which defines its Multifunctional concept, is that the same transducer used to harvest energy allows extracting the mechanical strain. On the one hand, based on a piezoelectric transducer, the mechanical vibrations are harvested to generate electrical energy, in order to start-up and supply the system, but on the other hand, the system is capable to extract the open voltage (VOC) of the piezoelectric harvester, which has a relationship with the mechanical strain [3].
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