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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Modeling and correction of peak-locking in digital PIV
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Modeling and correction of peak-locking in digital PIV

机译：数字PIV中峰值锁定的建模和校正

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摘要

The systematic tendency of PIV evaluations to bias towards integral pixel values is known as peak-locking. These errors, although small, significantly affect the statistics extracted from such measurements. In this paper, the process by which such errors accrue is modeled, and a scheme for the removal of the same is suggested. Specifically, the modeling process considers FFT PIV with discrete window offset. The results are applied to actual situations and the results are found to be encouraging. The process is computationally inexpensive, and can be applied as a post processing technique to existing data to correct peak-locking.
机译：PIV评估偏向积分像素值的系统趋势被称为峰值锁定。这些误差虽然很小，但会严重影响从此类测量中提取的统计数据。在本文中，对此类错误产生的过程进行了建模，并提出了消除此类错误的方案。具体而言，建模过程考虑具有离散窗口偏移的FFT PIV。将结果应用于实际情况，结果令人鼓舞。该过程在计算上不昂贵，并且可以作为后处理技术应用于现有数据以校正峰锁定。

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