Wind speed measuring device and method based on surface plasma resonance

Abstract

The invention belongs to the technical field of photoelectric detection and relates to a wind speed measuring device and method based on surface plasma resonance. The device includes a broad spectrumlight source, a heating light source, a fiber sensor, a spectrometer, a coupler, an isolator B, an isolator C, a circulator, a single mode fiber and a wind speed measuring pipeline, wherein the fibersensor is a fiber temperature sensor based on surface plasma resonance and strain compensation, a sensing fiber is formed through respectively plating metal films generating surface plasma resonance at inner walls of two dielectric holes at the center of opposite sides of a second hexagonal dielectric hole layer outwards, a medium hole plated with the metal film and two adjacent medium holes on the same layer are filled with a medium A, a media B is filled in all the media holes which are not filled with the media A, when the temperature of the fiber sensor changes, resonance wavelength changeof the metal films A and B is not consistent, a strain value is solved, the strain effect is eliminated, a temperature value is solved, and the fiber hotline wind speed is calculated on the basis.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and relates to a wind speed measurement device and method based on surface plasmon resonance. Background technique [0002] As a widely used gas flow velocity measurement method, the hot wire wind velocity measurement method is based on the relationship between the heat on the surface of the high-temperature object taken away by the airflow passing through the high-temperature object and the flow velocity of the airflow to achieve the measurement of the airflow velocity. By measuring the temperature of the high-temperature object The gas flow rate value can be obtained by temperature. [0003] Since electronic hot wire wind speed sensing equipment cannot be used in environments with high explosion-proof requirements, strong electromagnetic interference, and strong corrosion, and optical fiber equipment has the characteristics of intrinsic safety, anti-electromagnetic interference,...

AI Technical Summary

Problems solved by technology

Since the geometric size and structure of photonic crystal fiber and metal also affect the resonance wavelength, when the fiber sensor is affected by stress and strains, it will cause deviations in the measurement results of wind speed

However, the current fiber optic sensor based on surface plasmon resonance technology cannot eliminate the influence of strain on the measurement results.

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