说明：  积分式直流数字电压表的设计 摘要: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
(Integral DC digital voltmeter design Abstract: This paper introduces a microcomputer-based integral-type DC digital voltage meter hardware implementation and software design method. This digital voltmeter with automatic zero-type double-integrating A/D converter principle, single-chip computer to control the A/D conversion, test results show that: The voltage meter measurement error is small, job stability, but also with automatic range conversion)