说明：  以结构健康监测系统为研究背景，研究了光纤布拉格光栅（ＦＢＧ）传感器。对ＦＢＧ的研究起步并成熟于通信 领域，而对其在土木工程领域的研究尚处于发展阶段。为了进一步促进ＦＢＧ传感器的发展，推广其在工程中的应 用，通过在混凝土简支梁的底部布置经纤维增强复合塑料（ＦＲＰ）封装的准分布式ＦＢＧ传感器和未经封装的准分布 式ＦＢＧ传感器，研究了准分布式ＦＢＧ传感器对钢筋混凝土构件裂缝出现时的有效感知及定位问题。实验结果表 明可实现裂缝的大致定位，经ＦＲＰ封装的ＦＢＧ传感器相对于裸光纤光栅，其应变灵敏度有所下降。
(Structural health monitoring system for the research background, a fiber Bragg grating (FBG) sensors. The research started on FBG and mature in the field of communication, and its research in the field of civil engineering is still in the development stage. In order to further promote the development of FBG sensors to promote its application in engineering, through concrete beams arranged through the bottom of fiber-reinforced composite plastic (FRP) package quasi-distributed FBG sensors and quasi-distributed without the encapsulated FBG sensors to study the quasi-distributed FBG sensors for reinforced concrete cracks appear valid perception and positioning. The experimental results show that to achieve a substantially crack positioning, the FRP of the FBG sensor package relative to the bare optical fiber grating strain sensitivity of its decline.)