Method and system for measuring wind speeds and wind directions

Abstract

The invention discloses a method and a system for measuring wind speeds and wind directions. The method includes acquiring the wind speed range and the wind direction range of a to-be-measured wind; establishing an arc-shaped one-transmission four-reception array structure formed by a transmitting array element for transmitting signals and four receiving array elements for receiving the signals, and by taking one of the receiving array elements as a standard array element, acquiring a time delay calculation expression, in which the signals transmitted by the transmitting array element reachingthe receiving array elements is relative to the signals transmitted by the transmitting array element reaching the reference array element; according to the time delay calculation expression and thewind speed range and the wind direction range of the to-be-measured wind, by a beam forming algorithm, calculating the maximum value of output power of a beam former and determining the wind speed andthe wind direction corresponding to the maximum value as the wind speed and the wind direction of the wind. The method and the system have the advantages that the wind directions and the wind speedsare determined according to the time delay, in which the signals reaching the receiving array elements is relative to the signals reaching the standard array standard, and the beam forming algorithm,so that the problem of wind information errors caused by errors of measurement based on a time difference method is avoided, and measurement accuracy and measurement speed are improved.

Description

technical field [0001] The invention relates to the field of wind measurement, in particular to a method and system for measuring wind speed and wind direction. Background technique [0002] Wind is one of the most common natural phenomena. In meteorology, aviation, military, high-speed rail, navigation, etc., the accurate measurement of wind speed and direction is very demanding. At present, most of the ultrasonic anemometers, mechanical anemometers, thermal anemometers, etc. are used in the market, but these anemometers have certain defects in measurement accuracy, measurement range and anti-interference . For example, the shortcomings of the ultrasonic wind measuring instrument based on the time difference method: there is an error in the measurement of time and the error cannot be eliminated, which will cause the error of the wind measurement information; The measurement accuracy is not enough, the life is short, and the maintenance cost is high; the disadvantages of t...

AI Technical Summary

Problems solved by technology

At present, most of the ultrasonic anemometers, mechanical anemometers, thermal anemometers, etc. are used in the market, but these anemometers have certain defects in measurement accuracy, measurement range and anti-interference

For example, the shortcomings of the ultrasonic wind measuring instrument based on the time difference method: there is an error in the measurement of time and the error cannot be eliminated, which will cause the error of the wind measurement information; The measurement accuracy is not enough, the life is short, and the maintenance cost is high; the disadvantage of the thermal anemometer: due to the limitation of the wind measurement principle, its measurement range of wind speed is very limited, and the sensitivity is not high

Images