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Graphene/PVDF Nanocomposite-Based Accelerometer for Detection of Low Vibrations
Surendra Maharjan1, Victor K Samoei1, Ahalapitiya H Jayatissa1
1Nanotechnology and MEMS Laboratory, Department of Mechanical, Industrial, and Manufacturing Engineering (MIME), The University of Toledo, Toledo, OH 43606, USA.
Materials (Basel, Switzerland)
|February 25, 2023
Summary
A new graphene/polyvinylidene fluoride (PVDF) nanocomposite accelerometer detects low-frequency industrial vibrations. This flexible sensor offers high sensitivity for machine diagnostics.
Area of Science:
- Materials Science
- Mechanical Engineering
- Sensor Technology
Background:
- Industrial machinery requires monitoring for vibrations caused by issues like misalignment or loose fasteners.
- Existing accelerometers may lack the sensitivity or compactness needed for detecting subtle, low-frequency vibrations.
Purpose of the Study:
- To develop a flexible piezoresistive accelerometer using a graphene/PVDF nanocomposite.
- To assess the sensor's capability in detecting low-frequency and low-amplitude vibrations characteristic of industrial machinery faults.
Main Methods:
- Fabrication of a cantilever beam sensor with a proof mass using graphene/PVDF nanocomposite.
- Conversion of mechanical vibration into an electrical signal (change in resistance).
- Characterization of the sensor's response to acceleration in the 20 Hz to 80 Hz frequency range.
Main Results:
- The developed accelerometer successfully detected accelerations up to 8 gpk-pk.
- The sensor demonstrated high sensitivity in the low-frequency (20-80 Hz) range.
- The output signal correlated with the applied acceleration.
Conclusions:
- The graphene/PVDF nanocomposite accelerometer is effective for detecting low-frequency, low-amplitude industrial vibrations.
- The sensor's compactness, simplicity, and high sensitivity make it a promising alternative to conventional accelerometers for specific applications.
- This technology has potential applications in predictive maintenance for industrial machinery.
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