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¢J, rise time 2£gs, spatial resolution 400£gm. The calibration was performed in the temperature low at 1200¢J by using a K-type thermocouple that can gain between temperature and output voltage relations, but beyond the temperature 1200¢J applying to Planck¡¦s law as calculate to predict. In the calibrated temperature range, the measurement error is ¡Ó80¢J for the low temperatures and ¡Ó20¢J 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.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0809106-141520 |
| Date | 09 August 2006 |
| Creators | Hung, Shih-min |
| Contributors | Ming-huei Yu, Wen-mei Yang, Wood-hi Cheng, Jao-hwa Kuang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0809106-141520 |
| Rights | not_available, Copyright information available at source archive |
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