介绍了数据采集系统单扫描采集速率的一种简单实用的精确评价方法，即正弦波曲线拟合法。

A simple and useful evaluation method for the single scanning sampling rates of data acquisition system is presented. It utilizes the sinusoid curve fit method.

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利用余弦或正弦曲线对该精对准信号进行拟合，得到一系列的波峰点。

The intensity and position samples of the final-alignment signal are fitted with a cosine or sine curve, and then the series of peak points are derived from the model parameters.

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通过使用一个周期的正弦波曲线模型的滑动拟合法，实现了正弦载波相位调制信号波形的精确解调。

By using moving one period sine wave model, the precise demodulation of PM signal wave is achieved.

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