The work is devoted to the consideration of methods for determining the strain of objects using fiber Bragg gratings under a high-frequency vibration or pulsed mechanical action, which is difficult to perform using widespread methods and devices. They are small, lightweight, and immune to electromagnetic interference. Using multiplexing techniques, several sensors can be addressed by a single fiber. Therefore. Therefore, optical fiber Bragg grating has obvious advantages in detection of low frequency and ultra-low frequency. As designed in this paper, the Vibration Wire infrasound sensor based on the fiber Bragg grating, using vibrating string as a receiving component, can receive a full range of. changes more accurately, this paper established a more accurate monitoring model by comparing the fiber Bragg grating strain sensor and the vibrating string strain sensor bridge health monitoring calibration model.
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