On the basis of this method, and taking advantages of the methods-time-domain translation as well as the window length change, the uniform formula for the phase difference correction is derived.
在此基础上，将窗中心平移法与时域平移和改变窗长法综合应用，推导出相位差校正的统一公式。
Compared with the original two kinds of Phase-Difference Correction, only one sequence of time-domain signal is sampled and FFT analysis of same points is performed twice in this method.
与原两种相位差法相比，这种方法只采一段时域信号，且进行两次相同点数的FFT分析。
The interrelated factors of the error caused by sonic flowmeter using the time difference by hydrodynamics were analyzed, and the correction method was introduced.
运用流体力学原理，分析了利用时差法进行超声波流量检测时误差产生的相关原因，并提出了修正方法。
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