光纤陀螺系统在变形监测中的轨迹计算方法优化

Improvement of track curve calculation of FOG system in deformation monitoring

为了能够减少光纤陀螺(FOG)系统在大坝安全监测中的误差,在原有的计算方法基础之上,提出了一种新的轨迹曲线计算方法,并详细推导了该算法的计算过程。将光纤陀螺系统进行室外试验,分别根据两种计算方法计算出监测小车的运行轨迹曲线,同时与实际坡面曲线进行对比分析。结果表明,新算法计算出的轨迹曲线和真实曲线吻合度更高,能够更加有效地监测到局部微小变形,且能有效减少计算误差。最后将新算法运用到实际工程大坝监测中,将光纤陀螺系统常规算法及新算法计算出的曲线分别与水管式沉降仪测值比较,证实新算法能够有效提高光纤陀螺系统监测精度。

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.