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This book focuses on optical fiber sensing and structural health monitoring technolo-gies. It provides detailed information on the basic theory of F-P optical fiber sensors,fiber Bragg grating sensors, fiber laser grating sensors and fully distributed optical fiber sensors. Drawing on the authors’ research achievements and many years of practical experience in the field of engineering structure health monitoring, the book elabo-rates on the structural principle, design and manufacture of optical fiber sensors and monitoring technologies, and briefly describes advances made with regard to multiple

The international academic and engineeringcircles have reached a broad consensus to monitor the health of civilengineering structure, master the health state of structure in real time,discover and eliminate the potential safety hazard in time and guarantee thelong-term safe service of various civil engineering structures. The healthmonitoring technology based on optical fiber sensing has unique advantages suchas small volume, light weight, high sensitivity, anti-electromagneticinterference capability, integrated transmission and sensing functions, easynetworking and distributed measurement. Therefore, it made rapid developmentand considerable progress in recent 20 years. Its role in the health monitoringof engineering structure is increasingly important.

The author and his research team havededicated themselves to the research on the development and application ofhealth monitoring technology based on optical fiber sensing for a long time.They have rich research achievements and engineering practice experience. Thebook introduces the basic theory and method of optical fiber sensing technologyas well as the structural design, manufacture and practical application ofsensors from the point of structural health monitoring. The book is dividedinto 10 chapters. Chapter 1 is Introduction. It mainly introduces the basicconcept, type and feature of optical fiber sensing technology as well as itsapplication and development trend in the structural health monitoring field.Chapter 2-5 mainly focus on the demand for engineering structure healthmonitoring. They describe various optical fiber sensors, including F-P opticalfiber sensor, optical fiber laser sensor, fiber Bragg grating sensor and fullydistributed optical fiber sensor, from the aspects of sensor working principle,structure design, manufacture process and sensing characteristics. Chapter 6-9emphasize the health monitoring technologies of different engineering structuressuch as prestressed tendon, cable and concrete. Chapter 10 focuses on theengineering application of optical fiber sensing technology. It mainlyintroduces the long-term health monitoring, security evaluation and alarmsystem of several projects with optical fiber sensors, including Wuhu YangtzeRiver Bridge, Liaohe Grand Bridge on Qinhuangdao-Shenyang Passenger DedicatedLine, Hemaxi Grand Bridge, Xiaogou Grand Bridge on Shanxi Xinyuan Highway andthe high and steep slope of Shuohuang Railway.

The book summaries and integrates theresearch achievements and engineering applications of the author and hisresearch team in over 20 years. Sincerely thank the research team members fortheir dedicated cooperation and hard work for many years, including SunBaochen, Su Mubiao, Wang Xinmin, Zhao Weigang, Liu Yongqian, Chen Baoping, LiJianzhi, Chen Shuli, Li Yiqiang, etc. In addition, Zhang Xushe, Jin Xiumei, WeiBin, Zhang Wentao, Li Feng, Xu Hongbin, Li Xiaoyang, Liu Chenxi, Shao Lin, YangYaoen, Yang Liping, Dai Jingyun, Xu Hua, Hao Gengjie, Han Jing and Hou Yuemindevoted their wisdom and painstaking efforts to the research contents in thebook when they were studying for doctoral or master' degree. When the book wasdrafted and compiled, Liu Bo, Li Feng, Xu Hongbin, Sun Xu, Zheng Xinyu, RenZexu, Li Zhendong, Wang Qingyou, Sun Haokai, Wang Haiyong and other doctoral ormaster students made great efforts to the literature arrangement, translationand review. I am hereby deeply grateful to all of them.

The book was funded by China HighTechnology Research and Development Projects "Inspection and ReinforcementTechnology of the Bridge and Subgrade for Heavy-haul Railway"(2009AA11Z102) and "Monitoring Technology of Heavy-haul Train OperationDanger State Based on Optical Fiber Sensing" (2009AA11Z212); NationalNatural Science Foundation of China "Critical State Evaluation andCritical Technology Research on Cable-stayed Bridge Structure Based on SmartStay Cable" (50778116), "Monitoring Technology and Method Research onCritical Bearing Component State of Prestressed Reinforced ConcreteStructure" (50278058), "New Method of Long-term Composite Monitoringfor Prestressed Anchor Cable Corrosion Damage" (51778379) and "NewMethod of Long-term Monitoring for Geotechnical Anchor Cable with FullyDistributed Stress and Damage Positioning Function" (51508349); NaturalScience Foundation of Hebei Province "Research on the Real-time Monitoringand Security Evaluation System of Stayed Cable Based on Fiber BraggGrating" (E2004000417), "Critical Technology Research on Carbon FiberComposite Reinforcement with Automatic Monitoring Function" (E2006000389),"Dynamic Stress Analysis and Property of Intelligent Composite Materialfor Fiber Bragg Grating" (E2015210094); Scientific Research Project ofHebei Province "Research and Development of Optical Fiber Strain Sensorand Its Signal Acquisition System" (03213539D); Science and TechnologyResearch and Development Projects of Ministry of Railways "Long-term Monitoringand Security Evaluation System of Wuhu Yangtze River Bridge" (2000G19-B)and "Application Research on Optical Fiber Testing Technology of LiaoheGrand Bridge on Qinhuangdao-Shenyang Passenger Dedicated Line"(2001G018-B). The author hereby expresses his sincere thanks to the Ministry ofScience and Technology, National Natural Science Foundation of China, HebeiProvince, Ministry of Railways and other science and technology administrationdepartments for their full support and project grant.

It is hoped that the book is helpful forscientific researchers and engineering technicians in the field of structuralhealth monitoring and optical fiber sensing technology as well as the teachersand students in related majors of colleges and universities. The researchcontents in this book involve civil engineering, mechanics, photology,machinery, material, measurement and control, featuring multidisciplinaryinterpenetration, large span and high difficulty. Given the limited level ofthe author, it is unavoidable to have omissions and improperness in the book.Please kindly offer advice and correct them.

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