Abstract
The optical measurement technique became the new development direction in the field of high frequency vibration measurement.In this paper,a high frequency vibration detection system of optical fiber sensing has been designed the detection system is composed of the optical fiber vibration sensor and the detection unit of optical fiber vibration signal,based on facet reflection principle.The vibration signal is converted into light signal through the optical fiber vibration sensor,and then converted into electrical signal by the detection unit.In this way,the vibration signal is detected.The sensor is reflective intensity modulation fiber-optic sensor,which avoids demodulating the reflecting wavelength Comparing to other FBG sensors,the sensor structure is simple.In the experiment,the measurement range is from 2 kHz to 33 kHz,and the frequency measurement error is below 0.2%.Comparing with other optical methods of vibration measurement,the detection system has a wider bandwidth,higher responsefrequency and simple design of the sensor.
Published Version
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