13 October 2006 Real-time running workpiece temperature measurement at room temperature with refrigeration reference
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Proceedings Volume 6280, Third International Symposium on Precision Mechanical Measurements; 62803S (2006) https://doi.org/10.1117/12.716336
Event: Third International Symposium on Precision Mechanical Measurements, 2006, Urumqi, China
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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kebao Xu, Xiaojun Ju, Ping Zhu, Juncheng Wang, "Real-time running workpiece temperature measurement at room temperature with refrigeration reference", Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62803S (13 October 2006); doi: 10.1117/12.716336; https://doi.org/10.1117/12.716336
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