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Proceedings Paper

Real-time running workpiece temperature measurement at room temperature with refrigeration reference
Author(s): Kebao Xu; Xiaojun Ju; Ping Zhu; Juncheng Wang
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Paper Abstract

Non-contact is the only way used in real-time measurement of object surface temperature at dynamic state. Pyroelectric crystal material is heat-variable detector that is sensitive to temperature difference, but when temperature of detected object is close to or equal to that of ambient temperature, noise coefficient of using pyroelectric crystal material to measure difference is very prominent, so measurement accuracy can be reduced or measurement meaning is lost. This paper puts forward temperature difference compare method using precise refrigeration temperature as reference. Measurement of detected temperature at normal temperature using this method can not only overcome low SNR (Signal Noise Ratio) problem caused by small measurement temperature difference, but also compensate measurement error caused by ambient temperature changes. Based on measuring temperature characteristics of pyroelectric material, it is generally required that high SNR can be acquired only when temperature difference between refrigeration reference temperature and detected object temperature is more than 3°C.

Paper Details

Date Published: 13 October 2006
PDF: 6 pages
Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62803S (13 October 2006); doi: 10.1117/12.716336
Show Author Affiliations
Kebao Xu, Shandong Univ. of Science and Technology (China)
Xiaojun Ju, Shandong Univ. of Science and Technology (China)
Ping Zhu, Shandong Univ. of Science and Technology (China)
Juncheng Wang, Institute of Oceanographic Instrumentation (China)

Published in SPIE Proceedings Vol. 6280:
Third International Symposium on Precision Mechanical Measurements
Kuang-Chao Fan; Wei Gao; Xiaofen Yu; Wenhao Huang; Penghao Hu, Editor(s)

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