热电偶时间常数的测量  

Measurement of Thermocouple Time Constant

作　　者：傅元[1] 董宇哲[1] 李德健[1] 董健[2] 

机构地区：[1]沈阳工业大学,沈阳110870 [2]沈阳东大传感技术有限公司,沈阳110179

出　　处：《微计算机信息》2012年第10期128-130,共3页Control & Automation

摘　　要：为准确测量出热电偶的时间常数,根据热电偶对阶跃温度的响应,用单指数曲线描述过渡过程的数学模型,对记录的过渡过程曲线进行拟合,拟合后单指数曲线的时间常数就是被测热电偶的时间常数。对多种热电偶和同一热电偶的反复测试表明这种方法准确,相对于其它方法适应性更强。In order to accurately measure the time constant of the thermocouple, according to the temperature of the thermocouple to a step response, single exponential curve with a mathematical model of the transition process described, record of the transition pro- cess of fitting curves, after fitting a single exponential curve is the measured time constant time constant thermocouples. A variety of thermocouples and thermocouple repeated the same test shows that this method is accurate, compared to other methods more adaptive.

关 键 词：热电偶 时间常数 单指数曲线 阶跃响应 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]