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. 2023 Feb 14;16(4):1586.
doi: 10.3390/ma16041586.

Graphene/PVDF Nanocomposite-Based Accelerometer for Detection of Low Vibrations

Surendra Maharjan  1 , Victor K Samoei  1 , Ahalapitiya H Jayatissa  1
Affiliations

Graphene/PVDF Nanocomposite-Based Accelerometer for Detection of Low Vibrations

Surendra Maharjan et al. Materials (Basel). .

Abstract

A flexible piezoresistive sensor was developed as an accelerometer based on Graphene/PVDF nanocomposite to detect low-frequency and low amplitude vibration of industrial machines, which may be caused due to misalignment, looseness of fasteners, or eccentric rotation. The sensor was structured as a cantilever beam with the proof mass at the free end. The vibration caused the proof mass to accelerate up and down, which was converted into an electrical signal. The output was recorded as the change in resistance (response percentage) with respect to the acceleration. It was found that this accelerometer has a capability of detecting acceleration up to 8 gpk-pk in the frequency range of 20 Hz to 80 Hz. The developed accelerometer has the potential to represent an alternative to the existing accelerometers due to its compactness, simplicity, and higher sensitivity for low frequency and low amplitude applications.

Keywords: accelerometer; flexible piezoresistive sensor; low-frequency; proof mass.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Accelerometer and experimental setup. (a) Top view and (b) side view of cantilever.
Figure 2
Figure 2
Results of acceleration measurement at 30 Hz and amplitudes ranging from −6 dB to −3 dB.
Figure 3
Figure 3
Time response of acceleration at three representative frequencies.
Figure 4
Figure 4
(a) Repeatability test. (b) Response measurement at different frequencies with a fixed amplitude of −5 dB.
Figure 5
Figure 5
(a) Repeatability test at a representative frequency of 30 Hz for different amplitudes ranging from −6 dB to −3 dB. (b) Response measurement at a representative frequency of 30 Hz, 40 Hz, and 50 Hz for different g values.
See this image and copyright information in PMC

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