基于车载全站仪免置平设站的轨道精测模型与算法

“相对+绝对”复合测量模式在数据处理方法上取得突破,达到了较好的效果,但在测量环节上,仍然存在一些急需解决的问题。本文提出一种基于车载全站仪免置平设站的轨道精测方法,通过全站仪免置平设站方法打破了全站仪必须置平才能设站的传统,采用轨道中线坐标“设站即测量”的方式,从根本上消除了原有小车棱镜测量环节中测角误差的存在。线路试验表明:相比于现有“相对+绝对”复合测量模式,该轨道精测方法测量结果更稳定,不但提高了测量效率,还改善了测量精度,具有较高的工程价值和现实意义。

Track Precision Measurement Model and Algorithm Based on the Free-stationing of Vehicle ETS without Leveling

The relative and absolute composite measurement mode has made a breakthrough in data processing and achieved good results,but there are still some problems in the measurement that need to be solved urgently.A track precision measurement method based on the free-stationing of vehicle ETS without leveling is proposed.The traditional measurement mode that ETS must be leveled before free-stationing is broken by the way of free-stationing without leveling,and the angle measurement error in the vehicle prism measurement is fundamentally eliminated by the way of“free-stationing namely measuring”of the center line coordinates.The line test shows that,compared with the existing“relative+absolute”composite measurement mode,this track precision measurement method is more stable,which not only improves the measurement efficiency,but also improves the measurement accuracy.It has high engineering value and practical significance.