Displacement or acceleration sensor

Abstract

The invention discloses a displacement sensor or an acceleration sensor, belongs to the technical field of fiber sensors, and is characterized in that the displacement sensor or the acceleration sensor comprises a first fiber laser, a cantilever beam and a first platform, wherein, the first fiber laser is clamped between the surfaces of the cantilever beam and the first platform; the first fiber laser and the first platform are arranged below or above the cantilever beam; and the deformation generated by the cantilever beam generates acting force to the first fiber laser. The invention has the effects and benefits that the sensor overcomes the defect that the conventional electrical sensor is liable to electromagnetic interference; and the invention provides the fiber displacement sensor or the fiber acceleration sensor having the advantages of high sensitivity, large measurement range, simple structure, low demodulation cost and better signal-to-noise ratio.

Description

A displacement or acceleration sensor technical field The invention relates to the field of optical fiber sensing technology, in particular to a displacement or acceleration sensor based on a fiber laser, which can be used in the fields of micro-displacement monitoring of bridges, buildings, dams and other structures, earthquake monitoring, military micro-vibration measurement and the like. Background technique Displacement sensors are widely used in many fields such as industry, construction engineering, and offshore platform structure monitoring, and are very important sensors. Traditional displacement sensors are usually realized by electrical structures such as piezoelectric ceramics. Although the technology is mature and the cost is relatively low, it has many shortcomings such as low sensitivity, limited temperature range, and difficulty in shielding electromagnetic interference. With the rapid development of fiber optic devices in the 1990s, fiber optic sensors hav...

AI Technical Summary

Problems solved by technology

This sensor also has the similar defects of the displacement sensor mentioned above, and its demodulation cost is expensive, which has a certain gap in the actual large-scale application

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