摘要
介绍采用精密运算放大器、模数转换(A/D)、微控制器进行处理,对热电偶电动势进行精密测量的方法。该系统电路简单,测量方便、适应性强、测量电压的范围宽,工作稳定。经测定电动势测量范围在00.00-99.99mv,误差≤±0.2%,转换速度6.25次/秒,符合设计要求。
Introduced the use of precision operational amplifiers, analog-to-digital converter （A / D）, micro-controller to deal with the precision of the thermocouple electromotive force measurement method. The system is a simple circuit to measure convenience, adaptability and wide range of voltage measurements, the Working stability. Electromotive force measured by the determination of the range of 00.00-99.99mv, error ≤± 0.2%, the conversion rate of 6.25 times / s, consistent with the design requirements.
出处
《科技信息》
2010年第35期I0107-I0108,共2页
Science & Technology Information
关键词
热电偶
A/D转换
微控制器
Electric thermo-conple
A/D changes
Microeontrollers
