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Sensors 2018, 18(8), 2637; https://doi.org/10.3390/s18082637

Buckling-Based Non-Linear Mechanical Sensor

1
Department of Physics & Astronomy, Seoul National University, Seoul 08826, Korea
2
Department of Physics, Chonnam National University, Gwangju, Chonnam 61186, Korea
3
Department of Physics, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
*
Authors to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 7 August 2018 / Accepted: 7 August 2018 / Published: 11 August 2018
(This article belongs to the Special Issue Cantilever Sensor)
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Abstract

Mechanical sensors provide core keys for high-end research in quantitative understanding of fundamental phenomena and practical applications such as the force or pressure sensor, accelerometer and gyroscope. In particular, in situ sensitive and reliable detection is essential for measurements of the mechanical vibration and displacement forces in inertial sensors or seismometers. However, enhancing sensitivity, reducing response time and equipping sensors with a measurement capability of bidirectional mechanical perturbations remains challenging. Here, we demonstrate the buckling cantilever-based non-linear dynamic mechanical sensor which addresses intrinsic limitations associated with high sensitivity, reliability and durability. The cantilever is attached on to a high-Q tuning fork and initially buckled by being pressed against a solid surface while a flexural stress is applied. Then, buckling instability occurs near the bifurcation region due to lateral movement, which allows high-sensitive detection of the lateral and perpendicular surface acoustic waves with bandwidth-limited temporal response of less than 1 ms. View Full-Text
Keywords: buckling cantilever; non-linear force sensor; atomic force microscopy; bifurcation buckling cantilever; non-linear force sensor; atomic force microscopy; bifurcation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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An, S.; Kim, B.; Kwon, S.; Moon, G.; Lee, M.; Jhe, W. Buckling-Based Non-Linear Mechanical Sensor. Sensors 2018, 18, 2637.

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