Fiber grating strain sensing multi-source error compensation method

By constructing a joint compensation model for time series prediction, environmental modeling, and demodulator drift, and combining hyperparameter tuning and adaptive weighting modules, the error compensation problem of fiber optic strain sensors in complex environments was solved, achieving higher measurement accuracy and stability.

CN120846234BActive Publication Date: 2026-09-08DONGFANG GREEN ENERGY (HEBEI) CO LTD +1
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Patent Information

Application Number
CN202511211006.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-27
Publication Date
2026-09-08
Estimated Expiration
2045-08-27

AI Technical Summary

Technical Problem

Existing fiber Bragg grating strain sensors struggle to achieve comprehensive error compensation in complex environments. In particular, measurement errors caused by factors such as temperature and strain cross-sensitivity and demodulator drift are difficult to control effectively, affecting the sensor's measurement accuracy and long-term stability.

Method used

A joint compensation model for time-series prediction, environmental modeling, and demodulator drift is adopted. Combined with hyperparameter tuning, the measurement error caused by strain-temperature cross-sensitivity and environmental noise interference is fused through an adaptive weighting module to separate the center wavelength drift caused by actual strain.

Benefits of technology

It significantly improves the measurement accuracy and robustness of fiber Bragg grating strain sensors, making them suitable for long-term stable applications in complex environments.

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Abstract

The application relates to a fiber grating strain sensing multi-source error compensation method, which comprises the following steps: S1, solving the error caused by self-drift of a demodulator; S2, predicting the error caused by strain and temperature cross-sensitivity under time sequence conditions; S3, predicting the error caused by environmental parameters; and S4, coupling the error caused by time sequence and environmental parameters to obtain the center wavelength drift under the influence of temperature, and calculating the drift of the actual strain sensor affected by strain. The application effectively solves the measurement distortion problem caused by temperature cross-sensitivity and demodulator drift, significantly improves the measurement accuracy of the fiber grating strain sensor, and provides technical support for long-term stable application of the fiber grating strain sensor in a complex environment.
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