Error calibration method, system and equipment for ultrasonic anemometer in rainfall environment

The invention provides an ultrasonic anemometer error calibration method, system and device in a rainfall environment, and relates to the field of wind power generation, and the method comprises the steps: monitoring the sound characteristics generated when raindrops impact an ultrasonic anemometer in the rainfall environment in real time through a sound sensor or sound wave radar technology; estimating the raindrop size and raindrop density according to the sound characteristics to adjust the original ultrasonic propagation time, and generating the adjusted ultrasonic propagation time; according to the adjusted ultrasonic propagation time, the ultrasonic propagation time in the east-west direction and the south-north direction under the downwind and upwind conditions after the raindrop influence is considered is determined; correcting the wind speed in the east-west direction and the wind speed in the south-north direction according to the ultrasonic propagation time of the east-west direction and the south-