High-frequency acceleration sensor with optical fiber Bragg gratings and application method of high-frequency acceleration sensor

Abstract

The invention relates to a high-frequency acceleration sensor with optical fiber Bragg gratings and an application method of the high-frequency acceleration sensor, and belongs to the technical field of photoelectron measurement. According to the high-frequency acceleration sensor, a mass block is fixed at the top of a steel pipe and the bottom of the steel pipe is fixed on a base; a left elastic steel sheet and a right elastic steel sheet are arranged at the left and right sides of the steel pipe respectively; the lower ends of the left elastic steel sheet and the right elastic steel sheet are fixed on the base; the upper ends of the left elastic steel sheet and the right elastic steel sheet are connected and fixed onto the left and right ends of the mass block respectively; after being connected in series and welded, a left optical fiber Bragg grating and a right optical fiber Bragg grating are stuck on the left elastic steel sheet and the right elastic steel sheet respectively; one end of the left optical fiber Bragg grating and one end of the right optical fiber Bragg grating are connected through an optical fiber; leading-out optical fibers of the other end of the left optical fiber Bragg grating and the other end of the right optical fiber Bragg grating are led out from one side of the base respectively. With the adoption of the optical fiber Bragg gratings, the high-frequency acceleration sensor has relatively high anti-electromagnetic interference capability and anti-corrosion capability, and is suitable for monitoring a transformer for a long period; the high-frequency acceleration sensor is simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to an optical fiber Bragg grating high-frequency acceleration sensor and a using method thereof, which belong to the technical field of optoelectronic measurement. Background technique [0002] The working environment of the power transformer is harsh, and its working efficiency is relatively low, so there is a large magnetic flux leakage, forming strong electromagnetic interference. The working temperature of the power transformer is very high, and even the outer shell may reach a high temperature of about 70 degrees. The vibration monitoring environment of the transformer is in the harsh environment of high voltage, high magnetic field and high temperature, and the vibration frequency range of the transformer is roughly 10-2000Hz. At present, the sensors that can be used for transformer vibration detection are basically electromagnetic sensors. The common ones are eddy current sensors, piezoelectric sensors, etc. Their common ch...

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Problems solved by technology

[0005] The present invention provides an optical fiber Bragg grating high-frequency acceleration sensor and its use method, which are used to solve the real-time online detection of power transformer vibration and solve the structure and installation problems of the optical fiber Bragg grating high-frequency acceleration sensor during real-time online detection of transformer vibration. question

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