Encapsulation apparatus for exerting prestress of optical fiber grating sensor

Abstract

A package device for applying pre-stress on a fiber grating sensor comprises, on a pedestal, a left mounting base connected with a left moving stage, a right mounting base connected with a right moving stage, a platform lifting rod sleeve arranged between the left mounting base and the right mounting base, a left lifting sleeve arranged on the left moving stage, a right lifting rod sleeve arranged on the right moving stage, a translation conversion mechanism arranged on the left and the right moving stages, a left lifting rod arranged on the top of the left lifting rod sleeve and connected with a left clamp frame, a right lifting rod arranged on the top of the right lifting rod sleeve and connected with a right clamp frame, and a platform lifting rod arranged on the upper end of the platform lifting rod sleeve and connected with a platform. The package device has the advantages of simple mechanical structure, small size, low cost, easy operation, etc., and can be used in a temperature range of subzero 25 DEG C to above-zero300 DEG C to achieve high-temperature curing package when applying pre-stress to a fiber grating. The fiber grating sensor packaged by the device has no chirp and waveform aberration, thus ensuring the repeatability and the linearity of the sensor.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and in particular relates to a packaging device for optical fiber grating sensors. Background technique [0002] The fiber Bragg grating sensor is based on the center wavelength shift of the fiber grating reflection spectrum or transmission spectrum caused by the measured physical quantity. The measurement of the physical quantity to be measured can be realized by detecting the wavelength drift. It is a wavelength modulation sensor. It has strong anti-electromagnetic interference ability, With many advantages such as high sensitivity, small size, light weight, corrosion resistance, wide measurement range, easy integration, simple structure, and easy reuse, it can form an intelligent distributed sensor network. When the bare fiber grating is buried inside the material to be tested, it can realize multi-point distribution, simultaneous distinction, real-time online and permanent monit...

AI Technical Summary

Problems solved by technology

[0003] At present, when the fiber grating sensor is packaged, the axial prestress of the fiber grating is mostly applied by hanging weights, etc. These methods cannot continuously control the magnitude of the external force, so that the required prestress cannot be achieved.

However, for continuous afterburner packaging equipment, so far, no papers have been reported, and no products have been sold.

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