基于Δ-Σ型A/D转换器的热电偶温度测量模件  

Temperature Measuring Module with Thermocouple Based on Δ-Σ ADC

作　　者：孙延岭[1] 张红芳[1] 赵雪飞[1] 彭文才[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《水电自动化与大坝监测》2011年第5期37-39,共3页HYDROPOWER AUTOMATION AND DAM MONITORING

摘　　要：热电偶测量困难,易引起较大测量误差。分析了热电偶测温的关键因素,通过查表插值法解决非线性问题,提出了一种基于Δ-Σ型A/D转换器的热电偶温度测量模件软硬件设计方案,并结合试验数据进行了分析。采用简化设计方法,对提高模件测量精度、降低模件成本具有一定作用。It is difficult to measure the temperature based on thermocouple,as it will bring big measuring error easily.After the introduction of key factor to thermocouple measuring,the way of table look-up and interpolation is introduced to resolve the nonlinearity problem.The soft hardware design of a temperature measuring module based on Δ-Σ Analog to Digital Converter（ADC） is shown.Experimental analysis is shown according to the test data.As the module simplified the design method,it is valid to enhance measuring precision and reduce the cost.

关 键 词：热电偶 A/D转换器 温度测量 

分 类 号：TP335.1[自动化与计算机技术—计算机系统结构]