关键词: 光纤陀螺, 轨迹曲线, 监测精度, 大坝安全监测

Abstract: In order to reduce the error of fiber optic gyro (FOG) system in dam safety monitoring, based on the existing calculation methods, a new track curve calculation method was proposed, and the calculation process was deduced in detail. In a outdoor experiment for fiber optic gyro system, two methods were used to calculate the curve of monitoring car's running path, and the results were compared with the actual slope curve at the same time. The experiment results showed that the track curve calculated by the new method was more consistent with the actual curve, the new method can monitor the local minor deformation and reduce the calculation error more effectively. Then the new calculation method was applied to the practical monitoring of a dam. The track curves calculated by conventional algorithm and the new algorithm of optical fiber gyro system were compared to the measured value of water tube settlement. It is improved that the new algorithm can improve the accuracy of fiber optic gyro system more effectively.

Key words: fiber optic gyro, track curve, monitoring accuracy, dam safety monitoring