Handheld weather instrument and wind speed and wind power measuring method

Abstract

The invention provides a handheld weather instrument, a wind speed and wind power measuring method. The handheld weather instrument comprises an ultrasonic wind measuring sensor carried on the handheld weather instrument, wherein the ultrasonic wind measuring sensor comprises a transmitting plane, a reflecting plane, ultrasonic transducers, a wind speed and wind direction processor, a transceiving conversion module, a transmitting module and a receiving module, the number of the ultrasonic transducers in N groups is 3N, and the ultrasonic transducers in each group are distributed in an equilateral triangle shape. When the wind direction and the wind speed are measured, one ultrasonic transducer in one group is selected to transmit ultrasonic waves, the other two ultrasonic transducers in the group receive the ultrasonic waves, the time difference is obtained through the phase difference of two paths of receiving, cyclic transmitting and receiving are conducted, three groups of time differences can be obtained in each group, and on the basis of the time differences and according to a vector synthesis principle, the wind speed and wind direction values can be obtained. The wind speed and the wind direction are determined by adopting the method of measuring the ultrasonic phase to obtain the time difference, the accuracy degree is higher, and the handheld weather instrument has the advantages of small size, hand-held property, light weight and low power consumption.

Description

technical field [0001] The invention belongs to the technical field of ground meteorological detection, and in particular relates to a hand-held meteorological instrument based on an ultra-short distance ultrasonic wind sensor and a method for measuring wind speed and wind force. Background technique [0002] The hand-held meteorological observation instrument uses a mechanical wind sensor for wind measurement. The wind speed measurement uses a three-cup anemometer, and the wind direction uses a wind vane. The wind sensor with this structure is easily affected by external force, causing deformation and affecting the measurement error of wind. There is also an ultrasonic reflective wind sensor, whose wind measurement principle adopts the time difference method, calculates the time difference between transmission and reception, and calculates the wind direction and wind speed through the formula. Since the ultrasonic wave travels very fast in the air, in order to distinguish ...

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