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Proceedings Paper

Temperature and displacement measurement system with fiber optic sensors for turbine blades
Author(s): Yutian Wang; Yongjing Zhu
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Paper Abstract

In this paper, a novel technique is presented to measure temperature and axial displacement of turbine blades simultaneously with a single sensor probe, by using non-contact measurement method. The heat radiation property of high temperature objects and the principle of optical fiber transducers in pyrometry are described. Based on the basic principle of colorimetric measurement, a fiber-optic temperature sensor is selected, in view of its high measurement accuracy and practicability, which is suitable for hostile environments. For dynamic external surface measurement, a new reflective intensity-modulated displacement sensor with a simple and reliable structure is proposed. In this project, the main elements for the sensor, circuit system and single chip ADuC848 are discussed. Especially, a concentric multi-circle fiber bundle is used in the sensor probe, which is designed on the basis of the required temperature measurement range and displacement measurement range.

Paper Details

Date Published: 13 October 2006
PDF: 6 pages
Proc. SPIE 6280, Third International Symposium on Precision Mechanical Measurements, 62801G (13 October 2006); doi: 10.1117/12.716531
Show Author Affiliations
Yutian Wang, Yanshan Univ. (China)
Yongjing Zhu, Yanshan Univ. (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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