科创中国

The invention provides a large-range fiber Bragg grating displacement monitoring device. The device is characterized by comprising a strain acquisition and transmission component and a measurement component, wherein the strain acquisition and transmission component is used for monitoring the strain of a to-be-detected target and correspondingly zooming out the strain into small strain; the measurement component is used for measuring the wavelength change of a fiber Bragg grating caused by the strain; the rear end of the strain acquisition and transmission component is connected with the to-be-detected target, and the front end of the strain acquisition component is connected with the measurement component. The device converts the large strain of the to-be-detected target object into smallstrain of the front end of the displacement acquisition and transmission device through the rear end of a displacement acquisition and transmission device by establishing a strain transmission mechanism for the large strain of a matrix and the small strain of the fiber Bragg grating; the displacement monitoring device is used for measuring the small strain of the front end of the displacement acquisition and transmission device, and finally a processor is used for calculating and obtaining the displacement corresponding to the large strain of to-be-detected target.