不同量程信号融合抑制噪声新方法

针对高精度测量电路中采样通道和模数转换器(A/D）产生的噪声对精度的影响问题，提出了对同
一信号采用多通道同时进行采样，并结合多通道数据相关叠加算法对数据进行融合来减小测量噪声的新
方法.在实际测量过程中，利用A/D在不同的量程下信噪比不同的特点，采用一个固定量程的通道和一个
可变量程（随着信号量值变化而变化）通道同时对信号进行采样;这样,在降低噪声的同时还可以提高信
号的分辨率.实验证明，该方法能有效抑制噪声，保持测量的最高分辨率.此外该方法具有很好的实时性
，适用于高速信号处理的场合.

New method for suppressing noise based on different gain amplifier signal fusion

In the weak electrical signal measuring circuit,the noise generated from sampling channel and Analog-to-Digital converter(A/D) chip might affect the accuracy of the measurement.This paper proposes a new method,the multi-channel signal correlate weighed fusion algorithm,to suppress noise.Based on the(A/D's) special character that different gain amplifiers have different resolutions,an auto setting algorithm on A/D's gain amplifier was also used to improve the resolution of the measurement.The test result proved this method is simple and able to suppress the noise effectively can also be well applied in the real-time measurement situation.