A new type fiber-optic accelerometer

A novel all-metal fiber-optic accelerometer with Michelson interferometric configuration is proposed, using mass blocks and flexible reed structure. The sensing arm is configured to directly transform the applied acceleration to fiber deformation in axial direction, which increases the acceleration sensitivity of the sensor. The axis of the reference arm is set orthogonal to that of the sensing arm in order to make it insensitive to applied acceleration, and thus decrease the phase noise of the sensor. Using the flexible reed of 1mm thick and the mass block of 208g, an acceleration sensitivity of 556.7rad/g(54.9dB) is achieved by this structure. In the case of 10-4 rad/rt Hz(100Hz)noise floor, the minimum detectable acceleration is 200ng/rt Hz.

[1]  Limin Sun,et al.  A novel FBG-based accelerometer with high sensitivity and temperature self-compensation , 2009, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  G.H. Ames,et al.  Erbium Fiber Laser Accelerometer , 2007, IEEE Sensors Journal.

[3]  Erik A. Moro,et al.  A performance comparison of transducer designs for interferometric fiber optic accelerometers , 2010, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[4]  Francis X. Bostick,et al.  High Resolution Fiber-Optic 3-C Seismic Sensor System for In-Well Imaging and Monitoring Applications , 2006 .

[5]  David A. Jackson,et al.  Design of a compliant-cylinder-type fiber-optic accelerometer: theory and experiment. , 1995, Applied optics.

[6]  A. Stefani,et al.  High Sensitivity Polymer Optical Fiber-Bragg-Grating-Based Accelerometer , 2012, IEEE Photonics Technology Letters.

[7]  G. Johnson,et al.  Flexural beam-based fiber Bragg grating accelerometers , 1998, IEEE Photonics Technology Letters.

[8]  G. Brambilla,et al.  Theoretical and experimental demonstrations of a microfiber-based flexural disc accelerometer. , 2011, Optics letters.

[9]  Robert S. Fielder,et al.  High-temperature fiber optic sensors for harsh environment applications , 2004, SPIE Optics East.

[10]  Zeng Nan,et al.  A 3-Component Fiber Optic Accelerometer for Well Logging , 2005 .

[11]  A. Kersey,et al.  Experimental demonstration of a fiber Bragg grating accelerometer , 1996, IEEE Photonics Technology Letters.

[12]  Chun-Gon Kim,et al.  Performance of a single reflective grating-based fiber optic accelerometer , 2012 .

[13]  Alan D. Kersey.  Research following a foundation in the applied optics group at University of Kent , 2011 .