积分式直流数字电压表的设计

The Design of Integral Direct Current Digital Voltage Measure

介绍了一种基于单片机的积分式直流数字电压表的硬件实现和软件设计方法.此数字电压表采用自动校零型双积分A/D转换器的原理,利用单片机来控制A/D转换,测试结果表明:该电压表测量误差小,工作稳定,还具备自动量程转换功能。

The hardware and software implementation of integral direct current digital voltage measure （DVM） based on single chip microcomputer was introduced in this paper. The principle of DVM was auto-revise double integral A/D convertor, and A/D converting was controlled by single chip microcomputer. Testing results have shown that DVM measurement error was small, working steadily, moreover, the DVM has the function of auto switching.