摘要
本文设计的自动电阻测试仪主要由恒流源测量电路,测量信号放大电路,继电器组切换电路,步进电机驱动电路组成,以C8051F020单片机最小系统为数据处理和控制核心,具有100Ω、1 kΩ、10 kΩ、10 MΩ四个量程。各档位可进行自动切换。具有电阻筛选的功能,可以测量连续变化的电阻值并实时显示绘制曲线。该设计结构简单,运行可靠,精度高,具有较高的性价比和实用价值。
The design of the automatic resistance tester is mainly composed of a constant current source circuit, signal amplification circuit, relay switching circuit and stepping motor drive circuit. Taking the C8051F020 single chip microcomputer system as data pro- cessing and control core, it has four ranges of 100 Ω, 1 kΩ, 10 kΩ, 10 MΩ. Tile gears can be automatically shifted. The resistance filtrating function of it can measure the continuous changes of value and the real time display curve. The design has the advantages of simple structure, reliable operation, high precision, high performance price ratio and practical value.
出处
《山西电子技术》
2013年第6期24-25,87,共3页
Shanxi Electronic Technology
基金
山西省教育厅2012重点教改项目(JG2012062)
