Abstract: Provided are a three-dimensional (3D) ultrasonic anemometer, a 3D wind velocity measuring method, and a wind turbine. The 3D ultrasonic anemometer includes: an ultrasonic sensor including three pairs of ultrasonic transceivers arranged in different directions, wherein the ultrasonic sensor is installed at a rotation body rotating around a rotation axis and rotates around the rotation axis together with the rotation body; a signal processor outputting a 3D sensed wind velocity sensed by the ultrasonic sensor; and a coordinate converter converting the 3D sensed wind velocity into a 3D fixed wind velocity on a fixed coordinate system by using a rotation angle ? of the rotation body.

Abstract: The present invention relates to: a multi-speed meter capable of measuring a wind speed with a self-correction function, a wind speed measuring method with a self-correction function, and a moving apparatus having a multi-speed meter installed therein, which are installed on a ground-based moving apparatus significantly affected by a wind speed such as a bicycle or motorcycle to measure a wind speed and simultaneously correct a displayed speed. The multi-speed meter capable of measuring a wind speed with a self-correction function includes an absolute speedometer installed on a moving apparatus and measuring an absolute speed, a relative speedometer installed on the moving apparatus and measure a relative speed of the traveling object; and a control unit which receives and outputs the absolute speed and the relative speed respectively measured by the absolute speedometer and the relative speedometer, and outputs a wind speed which is the difference between the absolute speed and the relative speed.

Abstract: A technical object of the present disclosure is to provide an anemometer for a wind turbine which is capable of precisely measuring a wind velocity and a wind direction. To this end, an anemometer for a wind turbine of the present disclosure is an anemometer for a wind turbine which is used for a wind turbine including a plurality of rotating blades and a hub which is equipped at a rotation center of the plurality of rotating blades and has a nosecone and is equipped in the nosecone.

Abstract: The present invention relates to a driving assistance apparatus for a vehicle, and comprises: a wind sensor, which assigns in advance, through wind tunnel tests and the like, a driving stability region in which driving stability of the vehicle is maintained, and is attached to one side of the vehicle so as to measure two-dimensional wind direction and wind speed; and a processor for determining driving stability by using the driving speed of the vehicle and information of the wind direction and the wind speed which are measured by the wind sensor.

Abstract: A technical object of the present disclosure is to provide an anemometer for a wind turbine which is capable of precisely measuring a wind velocity and a wind direction. To this end, an anemometer for a wind turbine of the present disclosure is an anemometer for a wind turbine which is used for a wind turbine including a plurality of rotating blades and a hub which is equipped at a rotation center of the plurality of rotating blades and has a nosecone and is equipped in the nosecone.

Abstract: Provided are a three-dimensional (3D) ultrasonic anemometer, a 3D wind velocity measuring method, and a wind turbine. The 3D ultrasonic anemometer includes: an ultrasonic sensor including three pairs of ultrasonic transceivers arranged in different directions, wherein the ultrasonic sensor is installed at a rotation body rotating around a rotation axis and rotates around the rotation axis together with the rotation body; a signal processor outputting a 3D sensed wind velocity sensed by the ultrasonic sensor; and a coordinate converter converting the 3D sensed wind velocity into a 3D fixed wind velocity on a fixed coordinate system by using a rotation angle ? of the rotation body.