基于ATmega48的防垢水温水位测控仪设计

Prevent Scale Design for a Controller of Water Temperature and Level Based on ATmega48

根据对金属接触式水温水位传感器结垢成因的分析,提出在传感器两端注入对称交流信号抑制水垢形成的方法。介绍了一种基于ATmega48低成本、高性能的太阳能热水器防垢水温水位测控仪的设计。通过对测量噪声的分析,建立"白噪声+工频干扰"的噪声模型。针对这种噪声,运用过采样和求均值的方法提高ADC有效分辨率和改善信噪比,并给出一种抑制工频干扰的方法。

In the first place, according to analyzing the causes of formation scale of metal contiguous water temperature and level sensor that a method presented by adopting symmetrical AC signal in this paper. This paper introduces a prevent scale design circuit of water temperature and level of solar energy heater based on ATmega48, which is of lower cost and higher performance. Another innovative consideration here is, what's more, that system noises can be modeled white noise & power line interference from the an...