noise variance

In transducer test,the high amplitude discrete noise,caused by the transducer s high frequency harmonic wave,affects the data acquisition accuracy seriously.

在变频器测试中,由于变频器的高频谐波带来的大幅值离散噪声严重影响了数据采集信号的准确性,一般低通滤波算法无法滤除这种噪声,提出了一种数字滤波算法,解决了这种噪声的滤波问题,它可以有效地滤去信号中的大幅值离散噪点,从受到严重干扰的信号中恢复出真实信号。

It has been theoretically demonstrated that the sensitivity of measurement can be beyond the shot -noise limit.

并从理论上证明了该方法的相位测量精度不受散离噪声极限的限制。