数字水准仪在二等水准测量应用的探讨

Application of digital level on second-class leveling surveying

介绍Trimble DiNi新数字水准仪的原理、性能和误差来源。结合洛仙二等水准测量的实践,对其精度及误差进行分析,认为测量成果的精度取决于测量的方法和外界条件的影响,Trimble DiNi能满足二等水准测量的精度。在水准测量实施过程、作业期间通过测量设备的配置及检校等方法可以减少误差;并建议更新水准测量的规范及水准路线上重力点的密度选择等。

This article introduced the theory,capability and source of error of Trimble DiNi new digital level.Combining with practice of second-class leveling surveying in Luojiang and Xianyou,it analyzed its precision and error,and considered that the precision of survey result lied with survey of way and external condition,and that Trimble DiNi can satisfy its precision of second-class leveling surveying.Based on this,it expounded the methods to deploy and calibrate the survey equipment in the process of leveling surveying and during the operation period in order to reduce this error;it proposed to update the specifications of leveling surveying and chose density of gravimetric point above leveling route etc.