程控恒流法设计微小电阻精密测量系统  

Programmable constant current method designed small resistance precision measurement system

作　　者：井新宇[1] 

机构地区：[1]江阴职业技术学院,江苏江阴214400

出　　处：《电子技术（上海）》2016年第10期40-42,39,共4页Electronic Technology

摘　　要：针对电子测量领域中微小电阻精确测量的问题,设计了一种高精确度、多量程的智能毫欧计,测量范围0-2KΩ,测量准确度优于0.5%,采用开尔文（Kelvin）四端测量技术,以MSP430微处理器为核心,利用程控恒流源对微小电阻进行测量,设计了高稳定性的恒流源,高精密低噪声的电压放大器,有效消除温漂。实验证明,该测量仪对微小电阻测量具有自动化程度高、测量准确度及精度高、性能稳定等特点。For the problem of small resistance accurate measurement in the field of electronic measurement.It is designed for high precision, multi-range smart milliohm meter.Measuring range 0~2KΩ, measurement accuracy better than 0.1%.Kelvin four-terminal measurement technique is used.MSP430 microprocessor is core. The use of programmable constant current source for small resistance measurement.High stability constant current source and high-precision low-noise voltage amplifier is designed, The temperature drift is eliminated effectively. Experiments show that the measuring instrument for measuring small resistance with a high degree of automation, high measurement accuracy and precision, stable performance characteristics.

关 键 词：微小电阻 KELVIN 程控恒流源 MSP430 高精度 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]