机场净空智能监测仪测距和高程精度分析

为满足目前机场净空区障碍物测试需求,将电子经纬仪、激光测距仪和GPS的功能进行整合,研制智能化机场净空监测仪器。根据电磁波脉冲法测距原理以及实际采用的计数频率得出监测仪测距精度;通过对机场净空区内障碍物三角高程测量误差传播规律以及边长误差、垂直角观测误差、折光误差、仪器高及照准点标高的测定误差等各种误差的具体分析,并结合国内外民航组织机场净空区障碍物测量精度的要求,综合分析得出了监测仪高程精度要求。通过分析论证得出测距精度±0.5 m和高程精度±1 m的技术要求,为确定机场净空智能监测仪主要技术参数和选用相应仪器模块提供了理论依据。

Research on Distance and Height Precision Analysis of Airport Clearance Intelligent Monitoring Instrument

To meet the current demand for obstruction testing of airport clearance zone, the electronic theodolite, laser range finders and GPS capabilities are integrated, and an airport clearance intelligent monitoring instrument is developed. According to the electromagnetic wave''s principleof measuring distance and the actual count rate, the precision of monitor''s measuring distance is obtained.By specific analysis through error propagation of trigonometric leveling for obstacle in clearance zone and various errors, which includes side length error, observation error of the elevation angle, refractive error, such as error of the instrument height and sighting point height. etc., and in combination with the precision requirements of obstacle measurement by domestic and international civil aeronautics organization, the height precision requirements of monitor instrument is obtained through comprehensive analysis. Finally technical requirements for measuring distance accuracy ± 0.5 m and elevation accuracy ± 1 m are got by analysis and appraisal, which provide a theoretical basis for determining the main technical parameters of the airport clearance intelligent monitor and the selection of the appropriate instrument module from the market.