Wind speed measurement method based on parametric array

Abstract

The invention discloses a wind speed measurement method based on a parametric array, belonging to the field of employing sound waves to measure wind speeds. The parametric array can generate a high directivity audible acoustic beam, thereby overcoming the advantage that wind speed measurement is susceptible to multi-path interfere; meanwhile, the invention utilizes the nonlinear acoustic parameter--sound pressure level in an parametric array to measure wind speed change, and overcomes the disadvantages of single measurement of a traditional sound wave wind speed measurement method which only utilizes the linear rule of sound wave propagation speeds with the change of wind speeds to obtain wind speed values. The invention not only possesses the advantages of a traditional sound wave wind speed measurement method, and meanwhile has specific advantages in the fields of large range space wind speed measurement and wind speed measurement of higher accuracy.

Description

technical field [0001] The invention relates to a wind speed measurement method, in particular to a wind speed measurement method based on an acoustic parameter array. Background technique [0002] In recent years, the wind speed measurement technology has developed rapidly and the measurement methods are diversified. The main methods used include pitot tube wind speed measurement method, thermal sensor wind speed measurement method, mechanical wind speed measurement method and ultrasonic wind speed measurement method. Compared with other methods, Ultrasonic wind speed measurement method has been widely used for its advantages of large measurement range, good real-time performance and good precision. [0003] The basic principle of the ultrasonic wind speed measurement method is based on the high directivity characteristics of ultrasonic waves. Using the linear relationship between ultrasonic waves and wind speed, the wind speed can be obtained indirectly by measuring the pr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a wind speed measurement method based on the acoustic parameter array, which uses the law of the sound pressure in the sound field of the acoustic parameter array to change with the wind speed to measure the wind speed, so as to solve the problem that the ultrasonic wind speed measurement method cannot measure the wind speed in a large space. At the same time, the use of acoustic parametric arrays can generate high-directional low-frequency sound beams to solve the multi-channel interference problem of using audible sound waves for wind speed measurement

[0005] Another object of the present invention is to use the rule that the sound pressure in the acoustic parameter array changes with the wind speed to test the wind speed, so as to solve the single problem of only using the sound wave propagation time to measure the wind speed in the traditional sound wave wind speed measurement method

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