Optical fiber type two-dimensional wind speed/direction measuring device and method

Abstract

The invention relates to an optical fiber type two-dimensional wind speed / direction measuring device belonging to the technical field of wind speed / direction measurement, digital image processing, and the like. The optical fiber type two-dimensional wind speed / direction measuring device comprises a base plate, an upper plate and a point light source, wherein the upper plate is parallel to the base plate; the point light source is fixed on the upper plate and is connected to the beginning end of optical fiber; the upper plate is provided with a hole for being penetrated by the optical fiber and fixing the optical fiber; the optical fiber is divided into two parts, one part from the point light source to the upper part is used for leading in the point light source, and a vertical part from the upper plate to bottom is an air flow sensing part; the tail end of the optical fiber is fixed with a camera; the camera comprises a microspur lens group and an area-array photosensitive device; light spots sent by the point light source pass through the optical fiber and then project on the camera; an image acquired by the camera is sent to an image processing and computing unit; and the image processing and computing unit computes wind speed and wind direction according to the light spot image. The invention also provides a two-dimensional wind speed / direction measuring method realized by the optical fiber type two-dimensional wind speed / direction measuring device. The invention has the advantages of simple structure, low cost, little power consumption, high sensitivity, moderate volume, and the like.

Description

technical field

[0001] The invention belongs to the technical fields of wind speed / wind direction measurement, digital image processing and the like. It is mainly applicable to the fields of environment, meteorology, military affairs, scientific research and so on. Background technique

[0002] The main methods currently used for wind speed measurement include thermal, rotary, ultrasonic, and differential pressure. The principle of the thermal anemometer is that the conductor heated by the current (such as metal wire, resistor, etc.) Measurement of wind speed. Common wind cup anemometers and blade anemometers in the market all use rotary wind measurement technology. The basic principle is that the rotation speed of the wind cup and blade is proportional to the wind speed. The electrical signal is used to measure the wind speed. Ultrasonic anemometers use a pair of opposing ultrasonic transducers to measure wind speed by using the transit time difference between downwind ...

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