전기수력학적 프린팅 기술을 이용한 실시간 모니터링 센서 메커니즘

Abstract

Aircraft inspection methods have been developed with various individual technologies. Among them, the proposed mechanism overcomes several key weakness of conventional inspection methods. Currently, aircraft inspection using non-destructive testing is being conducted. However, non-destructive testing consumes a lot of time and money for testing. In particular, technologies that can be monitored in real time are needed to identify potential hazards arising during aircraft operation. This paper proposes a new detection mechanism to estimate and monitor microscopic damage to structures using electrohydrodynamic patterning technology. Sensors for monitoring are patterned into a grid structure using electrohydrodynamic technology. Polymer PVP is added to form a continuous pattern in order to increase the uniformity of the pattern and use of high viscosity ink. In addition, the piezoelectric ceramic PZT was mixed with the piezoelectric polymer PVDF to keep the line intact in the curved shape. The optimized polymer PVP content is 2 and the volume ratio of PZT and PVDF is 7:3. It mimics the spider's sensory organs to detect subtle deformations of the structure. The sensitivity of the sensor is increased by artificially implementing a continuous structure of cracks located in the spider's exoskeleton. Cracks show high resistance fluctuations due to increased spacing under load. The sensor for real-time monitoring is composed of a grid structure by forming a patterned layer in the horizontal and vertical directions. The load test and impact test are used to verify the structural integrity monitoring mechanism of the developed sensor. The sensor can estimate the deformation of the structure through the change in resistance and can accurately detect the location of the damage using the intersection of the damaged line. Therefore, the proposed mechanism is a powerful methodology for estimating and monitoring microscopic damage to structures.