复费率电度表对功率传输方向的自动判别

提出使用双光电探头采样方法和比较简单的电路，实现复费率电度表对功率传输方向的自动判别．其特点在于把功率传输方向的不同，转换成时序不同的二列脉冲，从分析功率传输方向改变过程中可能出现的不同状态，归纳出二列脉冲前、后两边沿对应的时序．并应用逻辑电路对脉冲的前沿和后沿进行必要处理，达到电能计量准确的目的．

Automatic Detection of Power Transmission Direction in the Multi-Rate Watthour Meter

This paper tells about how to make use of the sample method or. double photoelectric probe and a simpler circuit, to reallze automatic detection of power transmis sion direction in the multi-rate watthour meter. The feature is that it can turn the different directions of power transmission into two pulse trains with different time sequences. From analyzing the states that may occur in the changing process, we can summarize the feature of what it can be insulated-time sequence corresponded:to the rise and fall points of the two pulse tratins. And we can do some necessary processes for these points by logic circuits to get the accuracy in electrical measuring.