Research on measuring time constant of NANMAC thermocouple  

基于NANMAC热电偶的时间常数测试技术研究(英文)

作　　者：冯浩[1] 张志杰[1] 黄晓敏[1] 张晋文[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《Journal of Measurement Science and Instrumentation》2014年第4期1-4,共4页测试科学与仪器（英文版）

摘　　要：The theory for measuring the time constant of thermocouple was introduced, and the method for measuring the time constant of NANMAC thermocouple by using dynamic calibration system of transient surface temperature sensor was proposed. In this system, static and dynamic calibrations were conducted for infrared detectors and thermocouples, and then both temperature-time curves were obtained. Since the frequency response of infrared detector is superior to that of calibrat- ed thermocouple, the values measured by infrared detectors are taken as true values. Through dividing the values measured with thermocouples by those with infrared detectors, a normalized curve was obtained, based on which the time constant of thermocouple was measured. With this method, the experiments were carried out with NANMAC thermocouple to obtain its time constant. The results show that the method for measuring the time constant is feasible and the dynamic calibration of thermocouples can be achieved at microsecond and millisecond level. This research has a certain reference value for research and application of NANMAC thermocouple temperature sensor.

关 键 词：THERMOCOUPLE time constant static calibration dynamic calibration normalized curve 

分 类 号：TH811[机械工程—仪器科学与技术]