Abstract
Abstract An optical fiber Bragg grating accelerometer with symmetric multi-stage flexible hinge and double mass block structure is designed. According to the working principle of the two-degree-of-freedom vibration system, there are vibration nodes in the double mass block during the vibration process, and the vibration nodes can reduce the amplitude of the system and protect the optical fiber; and the multi-stage flexible hinge can reduce the structural rigidity and improve the sensitivity of the accelerometer. The experimental results show that the vibration signal is in the range of 5-90Hz, the acceleration is in the range of 0.1-1G, the sensitivity of the accelerometer is 878.4pm/G, and the linear fit R2=0.991. At the same time, the mechanical structure of the accelerometer is an integrated processing, with high mechanical strength, which can ensure the stability of the work of the accelerometer, and the structure is simple, and easy to package. Changing the length and thickness of the hinge can further expand the measurement range and application scenarios of the accelerometer.
Published Version
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