The invention relates to a method and device for carrying out acoustic imaging on fan noise, an electric vehicle charging pile and a storage medium. The method comprises the following steps: acquiring a noise time domain signal generated when the fan runs; performing time-frequency conversion on the noise time-domain signal based on a short-time Fourier transform algorithm to obtain a noise frequency-domain signal; inputting the noise frequency domain signal into a delay summation beam former for beam forming to obtain beam data; positioning principal component data of the beam data to obtain sound power data; and generating an acoustic image containing a sound source position according to the acoustic power data. According to the embodiment of the invention, the principal component of the beam data is positioned, so that the noise resolution capability can be improved, the effect of accurately positioning the sound source position is achieved, and a more accurate sound image can be obtained.
本公开是关于一种对风扇噪声进行声学成像的方法和装置、电动汽车充电桩、存储介质。该方法包括:获取风扇在运行时产生的噪声时域信号;基于短时傅立叶变换算法对所述噪声时域信号进行时频转换,得到噪声频域信号;将所述噪声频域信号输入延时求和波束形成器进行波束形成,得到波束数据;对所述波束数据的主成分数据进行定位,得到声功率数据;根据所述声功率数据生成包含声源位置的声图像。本实施例中通过对波束数据的主成分进行定位,可以提高对噪声的分辨能力,达到准确定位声源位置的效果,有利于获得更准确的声图像。
Method and device for carrying out acoustic imaging on fan noise and electric vehicle charging pile
对风扇噪声进行声学成像的方法和装置、电动汽车充电桩
2023-04-25
Patent
Elektronische Ressource
Chinesisch
IPC: | G01S RADIO DIRECTION-FINDING , Funkpeilung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / F04D Strömungsarbeitsmaschinen , NON-POSITIVE-DISPLACEMENT PUMPS / G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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