Wind turbine generator noise masking method and device based on noise control technique

A wind turbine and noise technology, which is applied to measurement devices, ultrasonic/sonic/infrasonic waves, sound-generating equipment, etc., can solve problems such as unreported applications in the field of wind farm noise control, and achieve the effect of reducing subjective annoyance and reducing influence.

Inactive Publication Date: 2013-10-09
ZHEJIANG UNIV
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Problems solved by technology

[0005] At present, the sound control technology has a large number of theoretical and experimental research foundations, and has b

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  • Wind turbine generator noise masking method and device based on noise control technique
  • Wind turbine generator noise masking method and device based on noise control technique

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Embodiment Construction

[0041] The following describes in detail in conjunction with an embodiment of the patent of the present invention.

[0042] Such as figure 1 Shown, device of the present invention comprises following 5 units:

[0043] (1) The pre-acquisition unit adopts a microcomputer installed with sound acquisition software and a supporting sound card as an operation and storage device, and adopts a 1 / 2-inch pre-polarized microphone and a The matching ICCP type preamplifier is used as the front end of sound collection. When sampling, the height of the microphone from the ground is 1.5m, there is no obstruction within 1m, and there is no obvious interference sound source around.

[0044] After sampling, use acoustic software such as Artemis or reputation to analyze the frequency spectrum of the collected sound samples. For the typical natural wind sound samples in residential quarters, the analysis time is set to 3s, and for the typical wind turbine noise samples in residential quarters, ...

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Abstract

The invention discloses a wind turbine generator noise masking device based on the noise control technique. The wind turbine generator noise masking device comprises a pre-collection unit, a storage unit, a signal collection unit, a processing unit and a sound playing unit. The invention further discloses a wind turbine generator noise masking method based on the noise control technique. The wind turbine generator noise masking method based on the noise control technique comprises the following steps that the pre-collection unit collects natural wind sound samples and wind turbine generator noise samples in resident residences and manufactures narrow-band sound samples with different sound pressure levels and different frequency bands, and the narrow-band sound samples are stored into the storage unit; the signal collection unit records the parameters of wind speed, air humidity, blade positions and the like during operation of the wind turbine generator, and therefore the noise spectrum data of the wind turbine generator are obtained; the processing unit enables the noise spectrum of the wind turbine generator to be compared with natural wind sound spectrum, and the frequency spectrum of sound samples which need to be superposed is calculated; sound samples which need to be superposed are composed by the processing unit with the utilization of the narrow-band sound samples according to the frequency spectrum of the sound samples which need to be superposed, the sound samples which need to be superposed are played through the sound playing unit, and therefore the noise, heard in the resident residences, of the wind turbine generator is made to be similar to wind sound.

Description

technical field [0001] The invention relates to the fields of environmental noise control and psychoacoustics, in particular to a noise masking method and device for wind turbines based on sound control technology. Background technique [0002] With the shortage of conventional energy and the improvement of human awareness of sustainable development, wind energy, as the most mature renewable energy except water energy, has been widely used all over the world. However, wind farms will generate noise pollution while using wind energy, which will have a negative impact on the surrounding environment. Low-frequency sound energy accounts for a large proportion of the noise generated by wind turbines (wind turbines). Compared with high-frequency sound, low-frequency sound attenuates more slowly during the propagation process, and at the same A sound level, it will annoy residents more. In addition, wind turbines generally operate 24 hours a day, and when the background noise is ...

Claims

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Application Information

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IPC IPC(8): G01H17/00G10K11/16
Inventor 翟国庆李争光
Owner ZHEJIANG UNIV
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