摘要
设计了一种可以方便地增加热电偶数目和灵活调节时间常数的新型环状热电堆传感器。该热电堆由16个结构单元串联组成,每个结构单元由两个铝合金圆环组成,含有50对镍铬-康铜热电偶,整个热电堆一共由800对镍铬-康铜热电偶串联而成,通过增加结构单元的数目可以方便地增加热电偶的数目从而提高测温精度。当采用铜丝替换部分热电偶时就可以灵活地调节时间常数,适应各种应用的要求。设计的结果表明该热电堆传感器可检测的最小温差为1.6×10^(-6)～2.1×10^(-6)K,被替换的热电偶的数目在0～50对时其时间常数可在30.3～188.8s内变化。
A new kind of annular thermopile sensor which consisted of 16 structure cells, 800 chromel - constantan thermocouples was developed. Each structure cell which was made up of two aluminium alloy rings consisted of 50 chromel - constantan thermocouples. The thermopile was formed when the structure cell was in series with each other. The thermocouple's number of the annular thermopile sensor can be added easily by adding the number of the structure cells. At the same time the temperature detection of the thermopile can be enhanced easily. And the time constant can be adjusted conveniently by replacing parts of the thermocouple by brass wire. So that the thermopile can be used extensively to meet the different needs. The results of the thermopile's design illustrated that the temperature detection can be as low as 1.6×10 - 2.1×10-6K, the time constant can be modulated between 30.3- 188.8s when the number of the thermocouples to be replaced changed between 0 - 50.
出处
《仪表技术与传感器》
CSCD
北大核心
2003年第5期1-2,10,共3页
Instrument Technique and Sensor
基金
国家自然科学基金(项目编号:30070200)
