中文摘要：

为实现大跨桥梁的结构线形快速检测,及时定位桥梁最大变形部位,采用基于光纤陀螺的连续轨迹测量技术进行桥梁线形检测技术研究。分析基于光纤陀螺传感技术开展桥梁连续线形检测的前提条件和基本原理,推导连续线形轨迹的计算公式,提出了线形检测流程及对测试结果的修正与标定方法,并在缩尺模型桥和实际大跨桥梁中进行了测试。结果表明：光纤连续线形测量系统的测试结果与传统百分表及全站仪的测试结果吻合,所测线形轨迹连续、精确,可准确定位桥梁结构最大变形部位。该技术可用于大跨桥梁连续线形的快速、准确检测。

英文摘要：

To achieve the rapid measurement of the structural curve modes of long span bridge and to timely and accurately locate the maximum deformation part of the bridge, the measurement technique for the curve modes of the bridge was researched, using the measurement technique for the continuous curve mode trajectory based on the fibre optic gyro （FOG）. The conditions and basic principle of the measurement conducted for the continuous curve modes of the bridge based on the FOG sensing technique were analyzed and the calculation formula for the continuous curve mode trajectory was derived. The measurement flow and the modifying and calibration methods for the measurements of the curve modes were proposed and the scaled-down model bridge and the actual bridge were measured, using the researched technique. The results of the research demonstrate that the measurements obtained from the FOG-based measurement system are accordant with those obtained by the traditional methods of dial indicators and total station. The measured curve mode trajectory is continuous and accurate and can be used to accurately locate the maximum deformation part of the bridge structure. With the researched technique, the rapid and accurate measurement of the continuous curve modes of the long span bridge can be achieved.