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基于質(zhì)點(diǎn)振速測(cè)量的近場(chǎng)聲全息技術(shù)
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    摘要:

    現(xiàn)有的近場(chǎng)聲全息技術(shù)都是通過在聲源近場(chǎng)測(cè)量聲壓來(lái)重建和預(yù)測(cè)聲場(chǎng),,并實(shí)現(xiàn)聲場(chǎng)的可視化,。采用同樣反映聲場(chǎng)特征的質(zhì)點(diǎn)振速來(lái)進(jìn)行聲全息計(jì)算,,并推出了基于振速測(cè)量的近場(chǎng)聲全息重建公式,通過仿真驗(yàn)證了該方法的正確性,、可行性和有效性,。通過與用聲壓重建的結(jié)果相比較,,表明本方法的邊緣重建精度高的特點(diǎn),;用質(zhì)點(diǎn)振速重建可以采用更小的全息面來(lái)獲得同樣的重建精度。

    Abstract:

    The current near field acoustic holography techniques are all based on the measurement of the pressure. In the paper, the method as well as the formulation based on the measurement of the particle velocity was proposed to reconstruct the acoustic field. The feasibility and correctness of the proposed method were validated by the numerical simulation. By comparing with the results based on the pressure, this new method has higher precision and smaller reconstruct error on the edge of the reconstruct plane, and it can achieve the same precision by smaller measurement aperture.

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張永斌,畢傳興,陳劍,陳心昭.基于質(zhì)點(diǎn)振速測(cè)量的近場(chǎng)聲全息技術(shù)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(9):112-115.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(9):112-115.

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