在两个频率成分靠的较近，但产生的模态耦合不严重时，通过二次校正可以降低耦合影响，提高估计精度。
When one frequency is close to the others and the coupling is not very severe, we can enhance the precision by the second correction.
一是利用分段FFT的相位差修正算法，二是基于二次内插的频率FF T校正法。
One method is phase difference correction of partly FFT; the other is FFT frequency correction with quadratic interpolation.
提出一种对传感器温度系数的校正新方法——采用二次方程校正法和温度补偿算法相结合的温度校正方法。
A new compensation method for the temperature coefficient of the sensor-the correction method of quadratic equation and the algorithm for temperature compensation is put forward.
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