Contact Temperature Measurement System Based on Tungsten-Rhenium Thermocouple
The temperature measurement of an explosion is a key problem in weapon research area. The non-contact thermometry has been developed to relative maturity by now, but the accuracy of this method is limited by uncertainties in the emissivity determination. In this paper, a contact temperature measurement system is proposed based on a tungsten-rhenium thermocouple. The cold junction compensation of the thermocouple is solved by the method of temperature correction, and the linearization of the thermocouple is carried out by searching the reference table directly. Two calibrations for the thermocouple are implemented in laboratory, one is the static calibration by using a dry block calibrator, and the other is the response time calibration by means of a CO2 laser. And the calibration results show that the thermocouple is suitable for the explosion temperature measurement. The proposed system is designed according to the theory of stored measurement, and the effectiveness of the system is verified in actual explosion experiments.
contact temperature measurement system explosion temperature measurement tungsten-rhenium thermocouple cold junction compensation linearization stored measurement
Daihua Wang Linli Song Zhijie Zhang
Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education North University of China Taiyuan, China
国际会议
太原
英文
660-663
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）