Optical fiber grating vibration sensor made of multi-cantilever beam all-insulation materials

Abstract

The invention discloses an optical fiber grating vibration sensor made of multi-cantilever beam all-insulation materials. The optical fiber grating vibration sensor comprises a vibration sensing system, a base and a top cover. The vibration sensing system comprises a mass block, four cantilever beams with equal lengths and a frame, and the frame is connected with the cantilever beams. The mass block is connected with the frame by the four slice cantilever beams and is supported and suspended by the cantilever beams. Four protruded quadrangular columns with equal heights are arranged at four corners of the base of a sensor, the vibration sensor is arranged in the base, and the frame of the sensor is exactly clamped on the surfaces of the four quadrangular columns, so that the vibration sensor can be suspended in the base. The optical fiber grating vibration sensor has the advantages that the cantilever beams can be driven by the mass block to vibrate along with the mass block when the sensor feels vibration, the wavelengths of a grating adhered on the mass block can vary, and vibration frequencies can be measured according to variation of the wavelengths of the grating; the mass block is fixed by the aid of the four cantilever beams, accordingly, the anti-jamming capacity can be enhanced, high-order modal resonance can be inhibited, vibration signals can be sensitively detected,and excellent insulation effects can be realized by the optical fiber grating vibration sensor owing to the insulation properties of the nonmetal materials.

Description

technical field [0001] The invention belongs to the optical fiber grating sensor technology, in particular to a multi-cantilever beam fully insulating material optical fiber grating vibration sensor structure technology. Background technique [0002] At present, in the field of fiber grating sensor technology, most of the vibration sensors we come into contact with are made of metal materials in terms of materials, and most of them are single cantilever beam structures in terms of structure. Sensors for metal materials have been widely used in industry so far. However, when faced with a working environment with a strong electric field such as high-voltage electrical equipment, the metal vibration sensor is likely to cause a local discharge phenomenon. Every partial discharge has some effect on the insulation medium of the equipment. This is an important factor that damages the insulation of high-voltage electrical equipment. For a vibration sensor with a single cantilever...

AI Technical Summary

Problems solved by technology

The multi-cantilever beam structure can overcome the problems of the traditional single cantilever beam structure, so that the ends of the four cantilever beams will approximately generate a single degree of freedom vibration under the action of load

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