Wind cup type fiber Bragg grating wind speed and direction sensor

Abstract

The invention relates to a wind cup type fiber Bragg grating wind speed and direction sensor, which belongs to the technical field of photoelectron measurement. Three wind cups are arranged in a way of forming included angles of 120 degrees together with one another; the central axis of a 1# wind cup is vertical to a true north direction; grooves are formed in the lateral edges of the three wind cups to the centers of the wind cups, and are connected with the free ends of three equal-strength cantilever beams respectively in the centers of the wind cups; the three equal-strength cantilever beams are fixedly arranged on the upper half part of a boss in a helical rising way; every two gratings are symmetrically stuck to the central axes of the front face and the back face of each equal-strength cantilever beam respectively after being coupled; six fiber Bragg gratings are coupled in a boss base through input and output fibers; and the input and output fibers are connected to a fiber grating signal demodulator. A fiber grating information material has the special physical properties of small size, electromagnetic interference resistance, long service life and the like, so that real-time online monitoring of the wind speed and wind direction of a wind load alarm control unit is realized, and high interference resistance and high accuracy are realized.

Description

technical field [0001] The invention relates to a wind cup type optical fiber Bragg grating wind speed and wind direction sensor, which belongs to the technical field of optoelectronic measurement. Background technique [0002] Wind speed and wind direction parameters are one of the most time-varying and most important elements of all meteorological observations, and are widely used in aerospace, industrial and agricultural production, and meteorology. At present, there are many types of wind speed and direction sensors in the world. According to the output, wind speed sensors mainly include pulse counting, analog, deflection angle, digital signals, etc. Wind direction sensors mainly include switching values, analog values, Gray codes, etc. These sensors involve The measurement methods mainly include rotation, pressure, hot wire, vortex and acoustics. In actual use, it is found that these sensors generally have problems in terms of anti-electromagnetic interference, electri...

AI Technical Summary

Problems solved by technology

Due to the flat plate structure, the transmission of wind resistance from the pressure plate to the cantilever beam is easily affected by the wind speed, wind direction and impurities in the wind; the linear bearing structure and the arrangement of the orthogonal coordinate system are used, and the sensor is affected by the hysteresis caused by the friction of the bearing. Larger, there is a hidden danger of sticking, and the measurement accuracy and sensitivity of the sensor are low; the four sensors are arranged on the same horizontal plane in the form of an orthogonal coordinate system, blocking each other, and each wind cup will be affected by the tail generated by other wind cups during measurement. Influenced by air flow, sensor measurement accuracy and sensitivity are greatly affected by air turbulence

Images