提高测量系统分辨率与信噪比的软件方法

The Improvement of the Resolution and SNR ofthe Measurement System by Software

在实际应用中,智能仪表的测量分辨率与信噪比是非常重要的技术指标。采样定理是采样过程中所遵循的基本规律,它指出了重新恢复连续信号所必需的最低采样频率。文中提出了利用过采样与求均值技术提高测量系统的信噪比和有效分辨率的方法,用该方法可在低成本条件下获得系统的高信噪比和有效分辨率。通过实例说明了软件实现的方法,并得出采用过采样与求均值技术具有很高的实用价值的结论。

In practical applications, resolution and SNR of intelligent meter are very important. In the course of the sampling, the sampling theorem is a basic rule and points out the least sampling frequency for reconstructing the signals . Using oversampling and averaging method to improve the resolution and SNR of the measurement system is described. The software is discussed with an example. Experiment shows that the oversampling and averaging method is very useful in practice.