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Development of a Bi-axial Accelerometer Based on Intensity Modulated Plastic Optical Fiber for Wind Turbine Monitoring

Y. GE, S. T. QUEK, K. S. C. KUANG

Abstract


The paper proposed an intensity modulated bi-axial accelerometer made from plastic optical fiber. The comparing to traditional piezo-electric accelerometer, the proposed design is light-weight, low-cost and immune to electromagnetic interference. The bi-axial acceleration was measured by light intensity coupling between a cantilever fiber and two receiving fibers. With pre-calibration, the two light intensity output are used to compute x and y components of a 2D acceleration. The frequency response test showed stable performance of the accelerometer up to 80 Hz, which is sufficient for the purpose of wind turbine monitoring.

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