Optical fiber differential pressure wind speed sensor and application thereof

Abstract

The invention discloses an optical fiber differential pressure wind speed sensor and application thereof. The sensor comprises a shell; two bushes which can stretch and contract circumferentially are arranged in the shell, wherein one of the bush is nested in the other sleeve, and the end portions of the bushes are sealed; a sensor is arranged between one end portion of the inner bush and one end portion of the outer bush; a cavity defined between the inner bush and the outer bush is filled with liquid, so that the influence of external noises can be decreased; and one of the inner bush and the outer bush is connected with the cylindrical section of a Venturi tube through a pipeline, and the other bush is connected with the necking section of the Venturi tube through a pipeline, and therefore, pressure generated by the flowing of the liquid through the Venturi tube can act on the sensor through the two bushes. According to the optical fiber differential pressure wind speed sensor and the application thereof of the invention, a double-corrugated pipe sensitivity-enhancing structure is adopted, so that the sensitivity of the sensor is improved, and the measurement lower limit value of the wind speed sensor is decreased; the optical fiber grating is arranged between the inner corrugated pipe and the outer corrugated pipe, so that the optical fiber grating can be prevented from contacting with external environment, and therefore, the service life of the sensor can be prolonged; and the cavity between the inner corrugated pipe and the outer corrugated pipe is filled with silicone oil, and the influence of external noises on the measurement accuracy of the sensor can be decreased.

Description

technical field [0001] The invention relates to the technical field of wind speed sensors, in particular to an optical fiber differential pressure wind speed sensor and its application. Background technique [0002] Wind speed measurement technology has a wide range of applications in coal and oil fields, navigation and aerospace, weather forecasting, power systems and other fields. Many kinds of wind speed sensors have been put into use to solve practical problems. However, for harsh environments, mechanical wind cup and hot wire wind speed sensors have their own limitations and cannot be used. At present, most of the widely used differential pressure wind speed sensors are electronic sensors, which are seriously disturbed by external electromagnetic interference. Electronic sensors themselves have potential safety hazards in flammable and explosive environments; Accurate measurements cannot be made at lower wind speeds. Contents of the invention [0003] In view of th...

AI Technical Summary

Problems solved by technology

However, for harsh environments, mechanical wind cup and hot wire wind speed sensors have their own limitations and cannot be used

At present, most of the widely used differential pressure wind speed sensors are electronic sensors, which are seriously disturbed by external electromagnetic interference. Electronic sensors themselves have potential safety hazards in flammable and explosive environments; Low wind speeds cannot be measured accurately

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