›› 2006, Vol. 27 ›› Issue (S1): 315-318.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Technology study of optical fiber bragg grating anchor bar sensor in tunnel strain monitoring

JIANG Qi1, SUI Qing-mei1, ZHANG Qing-song2, CUI Xin-zhuang2   

  1. 1.School of Control Science and Engineering, Shandong University, Jinan 250061, China; 2.School of Civil and Hydraulic Engineering, Shandong University, Jinan 250061, China
  • Received:2006-07-31 Published:2006-12-15

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Abstract: The principle and method of optical fiber bragg grating (FBG) sensor inspection are analyzed. According to the increasing development and requirement of tunnel construction engineering long-term testing, a kind of optical FBG sensor for diameter 22 mm anchor bar is put forward, designed, and fabricated for tunnel monitoring; because the electromagnetism sensor is not employed stably in rock and soil engineering monitoring. The axial strain of anchor bar can be detected by FBG on anchor bar easily. FBG anchor bar sensor is used in lab and highway tunnel. The experimental and practical results are both good. It is proved that FBG anchor bar sensor is of high precision on measurement, good anti-interference ability, long-term stability, simple structure, online real-time monitoring application of rock and soil, and so on.

Key words: tunnel, fiber bragg grating, anchor bar, monitoring

CLC Number: 

  • TP 212
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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