A multi-modal fiber sensing integrated wind turbine blade monitoring device

Abstract

The present application relates to wind power blade structure health monitoring technical field, especially to a kind of multimode optical fiber sensing integrated wind power blade monitoring device.It includes shell, optical fiber acoustic emission sensor and optical fiber strain sensor are embedded and installed on the outer side wall of shell, optical fiber temperature sensor, optical fiber humidity sensor and optical fiber vibration sensor are installed in shell interior;Optical fiber strain sensor, optical fiber temperature sensor, optical fiber humidity sensor and optical fiber vibration sensor jointly constitute the first sensing optical path based on optical fiber Bragg grating wavelength demodulation;Optical fiber acoustic emission sensor constitutes the second sensing optical path based on Fabry-Perot interferometer cavity intensity demodulation;First sensing optical path and second sensing optical path are independent of each other in optical sense.The sensor provided by the present application can synchronously collect strain, temperature, humidity, vibration and transient elastic wave multimode signal of wind power blade in service state, realize real-time evaluation and damage early warning of structure health state.