An optimized design and intensity noise suppression method for a fiber optic cantilever beam vibration accelerometer with an inclined end face.

By establishing an optical power transmission coefficient model and normalizing the DC component signal, the design of the inclined end face fiber cantilever beam vibration accelerometer was optimized, solving the problems of design deficiencies and noise suppression, improving measurement accuracy and simplifying the system.

CN122310795APending Publication Date: 2026-06-30ZHEJIANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2026-04-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the existing technology, the design of inclined end face fiber optic cantilever beam vibration accelerometers lacks quantitative optimization methods, and the intensity noise suppression technology has problems with optical path inconsistency and system complexity, which affect high-precision measurement.

Method used

An analytical model of the relationship between optical power transmission coefficient and input acceleration was established. Key structural parameters were determined through simulation, the accelerometer was optimized, and DC component normalization was used to process the signal to suppress intensity noise.

Benefits of technology

Quantitative optimization of the fiber optic cantilever beam vibration accelerometer with inclined end face was achieved, reducing the impact of optical power fluctuations on the measurement, improving measurement accuracy and system simplification.

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Abstract

This invention discloses an optimized design and intensity noise suppression method for a fiber optic cantilever beam vibration accelerometer with an inclined end face, belonging to the field of fiber optic sensing and vibration measurement technology. It includes sensor optimization design steps and intensity noise suppression steps. In the optimization design step, an analytical relationship model between the optical power transmission coefficient and the input acceleration is established in the main sensing axis direction and the transverse direction. Based on a given acceleration range and key structural parameter range, the influence curves of key structural parameters on key performance parameters are simulated, thereby determining the accelerometer structure. In the intensity noise suppression step, noise suppression is achieved by normalizing the DC component of the vibration acceleration signal of the designed sensor using a noise reduction method based on the DC component normalization of the same optical path. This invention simultaneously achieves high sensitivity, low nonlinearity, and low transverse sensitivity ratio accelerometer design and noise suppression, improving the accuracy and stability of acceleration measurement in complex environments.
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