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Proceedings Paper

Fiber Bragg grating based sensor for measuring temperature of in vivo lesion
Author(s): Xianhui Mao; Chunhui Niu; Yong Lu
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Paper Abstract

Because of the heat-resistant difference between the cancer cell and the normal cell, the normal cell can resistant higher temperature than cancer cell does. Clinical experiments showed that microwave or ultrasonic can effectively cure cancer. But since there is strong electromagnetic interference, the conventional temperature sensor will find itself hard to get the accurate temperature. So it is necessary to find a feasible sensor to measure the temperature. Fiber optic grating (FBG) sensor is excellent candidate for measuring temperature of in vivo lesion. In this paper, the investigation on the application of an optical fiber sensor in the field of biomedical engineering was introduced. The main objective of our investigation has been to develop a novel senor based on FBG to measure the temperature of in vivo lesion. Based on the Bragg equation, the temperature sensing properties of fiber optic grating was studied and the affection of central wavelength on the FBG sensing sensitivities have also been analyzed. In order to reduce the error of the FBG sensors system, it is necessary to adopt a good demodulation algorithm to calculate peak wavelength. An experimental system was set up which to test feasibility of the sensor. Among some of the peak detection algorithms, tested by experimental measuring system, the peak detection method by the Gaussian nonlinear curve fitting was finally adopted and the test results showed that the temperature measuring system based on the FBG was in the accuracy of 0.1°C.

Paper Details

Date Published: 27 May 2011
PDF: 6 pages
Proc. SPIE 7997, Fourth International Seminar on Modern Cutting and Measurement Engineering, 799720 (27 May 2011); doi: 10.1117/12.888535
Show Author Affiliations
Xianhui Mao, Beijing Information Science & Technology Univ. (China)
Chunhui Niu, Beijing Information Science & Technology Univ. (China)
Yong Lu, Beijing Information Science & Technology Univ. (China)


Published in SPIE Proceedings Vol. 7997:
Fourth International Seminar on Modern Cutting and Measurement Engineering
Jiezhi Xin; Lianqing Zhu; Zhongyu Wang, Editor(s)

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