Optical fiber sensor embedded in prefabricated structure

Abstract

The invention provides an optical fiber sensor embedded in a prefabricated structure. The optical fiber sensor comprises a detection optical fiber and a shell, wherein the detection optical fiber is wrapped with a protective layer, the inside of the shell is hollow, and an opening is arranged at one end of the shell, characterized in that: one end of the detection optical fiber is located in the shell and is fixedly connected with the shell, the other end of the detection optical fiber extends out of the shell from the opening, an adjusting device is arranged at the opening, and the adjustingdevice comprises a fixed ring, an adjustment knob and a push-pull strut. The detection optical fiber is arranged in the shell to detect the strain of the prefabricated structure, a simple structure isrealized, the adjusting device is arranged to adjust the pre-stress of the detection optical fiber and further adjust the sensitivity of the sensor, and the sensitivity of the sensor is adjusted according to different prefabricated structures that need to be embedded, the optical fiber sensor is convenient and flexible to use, and thus the service life can be controlled.

Description

technical field [0001] The invention relates to the technical field of sensors. [0002] Specifically, it relates to an optical fiber sensor embedded in a prefabricated structure. Background technique [0003] Optical fiber sensor is a sensor that converts the state of the measured object into a measurable optical signal. The working principle of the fiber optic sensor is to send the light beam incident from the light source into the modulator through the optical fiber, and interact with the measured parameters outside the modulator to make the optical properties of the light such as light intensity, wavelength, frequency, phase, polarization state, etc. It changes and becomes a modulated optical signal, which is then sent to the optoelectronic device through the optical fiber, and the measured parameters are obtained after the demodulator. In the whole process, the light beam is introduced through the optical fiber, and then emitted after passing through the modulator. Th...

AI Technical Summary

Problems solved by technology

The same sensor embedded in different prefabricated structures or in different components requires different precision, so the service life of the sensor is also different. The prestress of the optical fiber sensor has a direct relationship with its service life. The greater the prestress, the greater the tension. Larger, the shorter the life of the optical fiber, the prestress of the detection optical fiber of the existing pre-embedded optical fiber sensor cannot be adjusted, which cannot meet the demand

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