Temperature effect on all-inkjet-printed nanocomposite piezoresistive sensors for ultrasonics-based health monitoring
The sensing performance of nanocomposite piezoresistive sensors in acquiring broadband acousto-ultrasonic wave signals is scrutinized in an extensive regime of temperature variation from −60 to 150 °C, which spans the thermal extremes undergone by most aircraft and spacecraft. Ultralight and flexibl...
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Veröffentlicht in: | Composites science and technology 2020-09, Vol.197, p.108273, Article 108273 |
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Sprache: | eng |
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Zusammenfassung: | The sensing performance of nanocomposite piezoresistive sensors in acquiring broadband acousto-ultrasonic wave signals is scrutinized in an extensive regime of temperature variation from −60 to 150 °C, which spans the thermal extremes undergone by most aircraft and spacecraft. Ultralight and flexible, the sensors are all-inkjet-printed using a drop-on-demand additive manufacturing approach, and then optimized sensitive to the ultraweak disturbance induced by acousto-ultrasonic waves in virtue of quantum tunneling effect. Under high-intensity thermal cycles from −60 to 150 °C, the sensors have proven stability and accuracy in responding to signals in a broad band from static to half a megahertz. Compared with conventional broadband sensors such as piezoelectric wafers, this genre of inkjet-printed nanocomposite sensors avoids the influence of increased dielectric permittivity during the measurement of high-frequency signals at elevated temperatures. Use of the sensors for characterizing undersized cracks in a typical aerospace structural component under acute temperature variation has spotlighted the alluring application potentials of the all-inkjet-printed nanocomposite sensors in implementing in-situ structural health monitoring for key aircraft and spacecraft components.
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•Investigation of temperature effect in an extensive range on nanocomposite piezoresistive sensor.•Fabrication of ultralight and flexible all-inkjet-printed nanocomposite piezoresistive sensor.•Demonstrated capability in responding to broadband acousto-ultrasonic waves.•Proven stability and accuracy in acquiring signals at thermal extremes.•Application of in-situ structural health monitoring at varying temperatures. |
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ISSN: | 0266-3538 1879-1050 |
DOI: | 10.1016/j.compscitech.2020.108273 |