Rotating wheel vibration measurement method and rotating wheel vibration measurement device based on fiber gratings

Abstract

The invention provides a rotating wheel vibration measurement method and a rotating wheel vibration measurement device based on fiber gratings. The rotating wheel vibration measurement method comprises the following steps of binding the fiber gratings with different central wavelengths with two sides of a rotating wheel; making the rotating wheel rotate in a constant speed, in rotation of the rotating wheel, transmitting a vibration signal which is generated by the rotating wheel to the fiber gratings, and generating strain signals by the fiber gratings; performing photoelectric conversion on the strain signals of the fiber gratings, and performing data acquisition; processing the acquired data and drawing a time-wavelength line chart in which the wavelength changes along with time, and obtaining a corresponding vibration characteristic of the rotating wheel; making the rotating wheel perform constant-speed rotation in different rotating speeds, performing data acquisition in different rotating speeds, drawing a rotating-speed-wavelength line chart in which the wavelength changes along with the rotating speed, and obtaining the corresponding vibration characteristic of the rotating wheel; making the rotating wheel perform constant-speed rotation in a certain rotating speed, performing data acquisition in different angles-of-attack, drawing an angle-of-attack-wavelength line chart in which the wavelength changes along with the angle-of-attack, and obtaining corresponding vibration characteristic of the rotating wheel.

Description

technical field [0001] The invention relates to the field of optical fiber grating sensing, in particular to a method and device for measuring the vibration of a runner based on optical fiber gratings. Background technique [0002] With the development of vibration testing technology and the need for high-precision testing, it is imperative to develop high-performance vibration sensors. Optical fiber sensor technology emerged as the times require, and its appearance has brought unprecedented vitality to the development of sensors. A variety of fiber optic vibration sensors have been developed at home and abroad. Compared with traditional sensors, it is not only resistant to electromagnetic interference, but also small in size, light in weight, wide in dynamic range, high in precision, and able to work in harsh environments. The country's military and commercial fields have attached great importance to it, and various practical optical fiber sensors are also emerging. Howev...

AI Technical Summary

Problems solved by technology

In the practical application of fiber Bragg grating sensing, since the Bragg wavelength of the grating is sensitive to both strain and temperature, that is, the fiber Bragg grating sensor has the problem of cross-sensitivity of strain and temperature. The change in Bragg wavelength due to strain and temperature cannot be resolved separately, thus making accurate measurement impossible

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