Optical vibration sensor enabled by coupling mechanoluminescence with photostimulable phosphor

Area of Science:

• Engineering
• Materials Science
• Optics

Background:

• Vibration analysis is crucial for detecting abnormal machine conditions in industrial settings.
• Real-time, low-cost vibration sensing is essential for effective equipment health diagnostics.
• Existing methods often require external power sources and lack integrated storage.

Purpose of the Study:

• To develop a self-powered optical vibration sensor for industrial applications.
• To enable on-demand visual readouts and data storage for vibration signals.
• To provide a novel solution for machine status tracking and equipment health diagnostics.

Main Methods:

• Design and fabrication of a self-powered optical vibration sensor prototype.
• Finite element analysis (FEA) for performance prediction.
• Experimental validation of sensor performance across a broad frequency range.
• Utilization of near-infrared light for on-demand visual readout.

Main Results:

• The sensor operates without external power, covering a frequency range of 50 to 800 Hz.
• Achieved a predicted minimum detectable deformation as low as 0.19 µm.
• Demonstrated vibration signal storage functionality.
• Successful on-demand visual readout using near-infrared light.

Conclusions:

• The proposed optical vibration sensor offers a self-powered, low-cost solution for industrial machine monitoring.
• The device's ability to store and visually readout vibration signals provides a novel approach to equipment health diagnostics.
• This technology has the potential to significantly advance the field of vibration sensing.