Abstract
Recent advances in nanomaterials technology create the new possibility to fabricate high performance sensors. However, there has been limitations in terms of multivariate measurable and interoperable sensors. In this study, we fabricated an interoperable silver nanoparticle sensor fabricated by an aerodynamically focused nanomaterial (AFN) printing system which is a direct printing technique for inorganic nanomaterials onto a flexible substrate. The printed sensor exhibited the maximum measurable frequency of 850 Hz, and a gauge factor of 290.62. Using a fabricated sensor, we evaluated the sensing performance and demonstrated the measurement independency of strain and vibration sensing. Furthermore, using the proposed signal separation algorithm based on the Kalman filter, strain and vibration were each measured in real time. Finally, we applied the printed sensor to quadrotor condition monitoring to predict the motion of a quadrotor.
Highlights
A sensor is a key enabler for the process or condition monitoring and optimization for an overall machine [1,2,3]
Using successive repetition of excitation and purging of aerosolized nanoparticles, aerosolized nanomaterials are aerodySensors 2021, 21, x FOR PEER REVIEW. Namically focused when they erupt from the aerodynamically focused nanomaterial (AFN) system and directly accumulated on to a substrate governed by drag force, Saffman’s lift force, and centrifugal force [25]
A simplified electron-tunneling model has often been used to explore the resistive responses of the NPs based strain sensor, represents that the relative resistance change is due to mechanical detachment between NPs
Summary
A sensor is a key enabler for the process or condition monitoring and optimization for an overall machine [1,2,3]. Data obtained by sensors and real-time feedback to a mechanical system enable the direct benefits for the quality and performance of the end-product. Previous research related to sensor technologies have focused on expanding the physical quantity that can be measured and improving the performance of the sensor itself [4,5,6,7,8]. There have been several efforts to fabricate highly sensitive strain sensors using metal nanoparticles (NPs) [9,10,11,12,13]. Using the current transport mechanism based on current tunneling between nanogaps between NPs, drastic contact resistance change was available according to physical quantity to be measured [14,15,16,17,18].
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