Setting up and Application of Infrared Temperature-Sensing System

• Main Authors: Shih-min Hung, 洪詩敏
• Other Authors: Ming-huei Yu
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/11699839737980816328

碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 94 === The study aims to develop an infrared temperature-sensing system by applying to thermal radiation theory. The system consists of an optic unit, a photodetector, and an electronic unit. This system detects thermal radiation at 1310 nm wavelength, the temperature range of the system is 600~4000℃, rise time 2μs, spatial resolution 400μm. The calibration was performed in the temperature low at 1200℃ by using a K-type thermocouple that can gain between temperature and output voltage relations, but beyond the temperature 1200℃ applying to Planck’s law as calculate to predict. In the calibrated temperature range, the measurement error is ±80℃ for the low temperatures and ±20℃ for the high temperatures. The system was used to measure temperature variation during Nd:YAG pulse laser welding process. Experiments ware performed with stainless steel plates as specimen radiation by a laser pulse of 7ms duration time and various energy in the rang of 1245~5313mJ. The experimental results show the feasibility of the infrared temperature-sensing system in application of Nd:YAG pulse laser welding process.