这个需要外扩ram 但一片51应该实现不了连续采集两小时然后读出数据　
至于电压采集 外扩一片ad 输入前端电压互感器传过来的模拟信号 转换为数字信号即可。 可以采用内部带有eeprom的单片机 实现掉电不易失功能。
比如stc51之类的即可(This requires an extension of the ram, but a piece of 51 should not achieve continuous acquisition for two hours and then read the data
As for voltage acquisition, a ad input is expanded, and analog signals from the voltage transformer are converted to digital signals. Can use the internal microcontroller with EEPROM, power down is not easy to function.
For example, stc51 and so on)