讨论电表信号隔离传输的意义,分析目前各种实现手段的优缺点,提出一种数据隔离设计方案.方案采用ELAN公司的EM78P372N单片机为核心,用12 bit AD采样电表输入信号,数字信号通过光电耦合器进行自定义协议与后级单片机通信,实现有效隔离....讨论电表信号隔离传输的意义,分析目前各种实现手段的优缺点,提出一种数据隔离设计方案.方案采用ELAN公司的EM78P372N单片机为核心,用12 bit AD采样电表输入信号,数字信号通过光电耦合器进行自定义协议与后级单片机通信,实现有效隔离.测试结果表明,方案的电路设计合理,准确率高,成本低,安全性能好,具有很好的应用前景.展开更多
The characteristics of the lowest mixed-symmetry states 2＋msand 1＋ms for132Xe,134 Ba and136Ce in the even-even N = 78 isotones are investigated within the framework of the IBM2 model. The lowest mixed-symmetry stat...The characteristics of the lowest mixed-symmetry states 2＋msand 1＋ms for132Xe,134 Ba and136Ce in the even-even N = 78 isotones are investigated within the framework of the IBM2 model. The lowest mixed-symmetry state 2＋mslevels for both a single isolated state in132 Xe and136Ce and a fragmented state in134 Ba are reproduced by the predictions. The agreement between the IBM2 calculation and the experimental values is good for the B（E2）and B（M1） transition probabilities both quantitatively and qualitatively. The predicted summed B（M1） strength follows the experimental data, remaining nearly constant as a function of proton number along the chain of the N =78isotones.展开更多
文摘讨论电表信号隔离传输的意义,分析目前各种实现手段的优缺点,提出一种数据隔离设计方案.方案采用ELAN公司的EM78P372N单片机为核心,用12 bit AD采样电表输入信号,数字信号通过光电耦合器进行自定义协议与后级单片机通信,实现有效隔离.测试结果表明,方案的电路设计合理,准确率高,成本低,安全性能好,具有很好的应用前景.
基金Supported by National Natural Science Foundation of China(11475062)Natural Science Foundation of Zhejiang Province,China(KY6100135)
文摘The characteristics of the lowest mixed-symmetry states 2＋msand 1＋ms for132Xe,134 Ba and136Ce in the even-even N = 78 isotones are investigated within the framework of the IBM2 model. The lowest mixed-symmetry state 2＋mslevels for both a single isolated state in132 Xe and136Ce and a fragmented state in134 Ba are reproduced by the predictions. The agreement between the IBM2 calculation and the experimental values is good for the B（E2）and B（M1） transition probabilities both quantitatively and qualitatively. The predicted summed B（M1） strength follows the experimental data, remaining nearly constant as a function of proton number along the chain of the N =78isotones.
