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实用新型
CN201107339Y 数字式交直流电表 失效 - 权利终止

数字式交直流电表
摘要：
本实用新型涉及一种数字式交直流电表，包括电源部分及控制电路部分；其特征在于所述电源部分是经过电源回路，产生工作电源；控制电路部分包括PT/CT、整流滤波电路、A/D转换电路及中央处理单元CPU模块连接组成；PT/CT接收电压或电流信号后，进入整流滤波电路的输入端口，整流滤波电路的输出端口与A/D转换电路的输入端口连接，A/D转换电路的输出端口与中央处理单元CPU的输入端口连接；中央处理单元CPU的输出端口分别与显示器数码管、通讯接口连接。本实用新型结构简单，调整简便，安装方便灵活；精度高、功耗小、寿命长，稳定性、可靠性高；成本低，应用广，市场前景广阔。
摘要（英）：

The utility model relates to a digital AC/DC meter, which comprises a power supply part and a control circuit part. The digital AC/DC meter is characterized in that the power supply part generates a working power supply through a power supply circuit, the control circuit part comprises a PT/CT, a rectification filter circuit, an A/D switching circuit, and a CPU module which are connected; the PT/CT enters the inport of the A/D switching circuit after receiving a voltage or current signal, the outport of the rectification filter circuit is connected with the inport of the A/D switching circuit, the outport of the A/D switching circuit is connected with the inport of the CPU; the outport of the CPU is respectively connected with a display nixietube and a communication interface. The digital AC/DC meter has the advantages of simple structure, convenient adjustment, flexible installation, high precision, little power consumption, long service life, high stability and reliability, low cost, wide application, and wide market prospect.

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