| 摘要 |
PROBLEM TO BE SOLVED: To provide an airspeed measuring device for an aircraft capable of measuring a low speed area by improving a sensor probe of an ultrasonic anemometer suitable for measuring a gentle wind and having no movable part. SOLUTION: A plurality of ultrasonic transmitters-receivers are equipped in axially different positions on three support bars mounted to an airframe parallel or having slight open angles so that their axes are positioned on the respective vertexes of a triangle toward the front direction of the aircraft. Plural sets of ultrasonic transmit-receive routes are formed by a combination of the ultrasonic transmitters-receivers on the adjacent support bars, and three- dimensional information on airspeed is obtained from time information of propagation in plural sets of the ultrasonic transmit-receive routes of specified distance. |
