Wind speed measurement method based on parametric array

A technology of wind speed measurement and acoustic parameter, applied in fluid velocity measurement, velocity/acceleration/impact measurement, measurement device, etc., can solve problems such as single method, inability to measure wind speed, multi-path interference of audible sound waves, etc.

Inactive Publication Date: 2015-10-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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-d

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  • Wind speed measurement method based on parametric array

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] figure 1 The implementation process of the present invention is shown. The concrete implementation method of the present invention is as follows:

[0021] Step 1. Establish the nonlinear relationship between different offset positions and sound pressure on the section of the acoustic parameter array under no wind condition:

[0022] (1) Modulate the low-frequency acoustic signal with a frequency range of 1-10kHz on the high-frequency ultrasonic signal. The frequency range of the high-frequency ultrasonic signal is generally 35-55kHz, and transmit the modulated signal into the windless air through a broadband acoustic parameter array , the ultrasonic signal modulated with a low-frequency signal will undergo nonlinear interaction, self-demodulate and reproduce the low-frequency acoustic signal, and use it as a sound source for detection;

[0023] (2) ...

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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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Application Information

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IPC IPC(8): G01P5/24
Inventor 陈敏徐利梅李心明李兴勇何龙富赵祖立宋业强
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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