基于陀螺经纬仪的隧道断面高精度测量方法研究

Research on high precision measurement method of tunnel section based on gyrotheodolite

在隧道断面测量中,传统测量方法由于存在通视障碍,在测量陀螺方位角过程中产生误差。为此设计了基于陀螺经纬仪的隧道断面高精度测量方法。根据隧道断面特征点的信息对坐标方位角进行换算,完成外业数据的采集,通过点云拟合断面的方式提取隧道断面轴线,选定5个逆转点并对其进行检测,利用得到的数据信息进行陀螺方位角定向计算,完成了基于陀螺经纬仪的隧道断面高精度的测量。用传统方法和设计的方法分别对5组隧道断面进行测量,对比结果表明,设计的测量方法误差比传统方法的误差小约15°19′22″,验证了基于陀螺经纬仪的隧道断面高精度测量方法的有效性。

In the tunnel section measurement,the traditional measurement method has errors in the process of measuring gyro azimuth due to the obstacles of visibility.A high precision tunnel section measurement method based on gyrotheodolite is designed.According to tunnel profile feature point information to conversion of coordinate azimuth,field data is collected,tunnel section axis is extracted by means of point cloud fitting section,five reversal points are selected to test,data information obtained is used for gyroscope azimuth directional calculation,the tunnel section based on gyro theodolite and high precision measurement is completed.Five groups of tunnel sections are measured by the traditional method and the designed method respectively.The comparison results show that the error of the designed measurement method is about 15°19′22″ smaller than the error of the traditional method,which verifies the effectiveness of the high-precision measurement method of tunnel section based on gyro theodolite.