数字近景摄影测量野外特殊研究区域活动控制系统设计与实现

Design and Implementation of Portable Controller in Digital Close Range Photogrammetry for Field Special Research Area

为了满足特殊区域(硐室、隧道)岩体结构面三维信息快速采集的需要,利用S304不锈钢方钢管设计并制作了一套可拆卸的、其上带有28个控制点的活动控制系统,应用免棱镜激光全站仪对28个控制点进行观测获得其空间三维坐标值,精度评定点位误差为±2mm;同时对该活动控制架进行了室内外稳定性检验:室内通过检验两个邻近控制点的间距,结果显示其误差在±1mm之内;室外通过实际观测与坐标转换值进行对比其控制点误差在±3.2 mm之内,该误差可以满足数字近景摄影测量技术中对中等精度要求方面的工程应用。经野外验证该活动控制系统自身坚固、结构稳定、拆卸后体积小、重量轻、野外应用携带方便,加之高清晰度的成像为野外特殊区域的控制测量提供了保障。该系统的建立满足了数字近景摄影测量技术在特殊岩体结构面信息快速获取中的需要。

In order to meet the needs of rapid acquisition of rock mass structural plane three-dimensional information in special area （dwelling rooms, tunnels）, a detachable and moveable control frame with S304 stainless steel square is designed and manufactured, which provided with 28 control points, and the three-dimensional coordinate values of the 28 control points are obtained by using a prismless laser total station instrument, and point error is ± 2 mm by the accuracy evaluation. The portable control frame is tested for indoor and outdoor stability： the interior passed the test of the spacing between two adjacent control points, and the results showed that the error was within ±1 mm; the outdoor error of the control point was within ±3.2 mm by compared between the actual observation and the coordinate conversion value. After feld verifcation, the portable control system has its own solid structure, small size after disassembly, light weight, and convenient use in the feld. In addition, high-resolution imaging provides guarantee for control and measurement of special areas in the feld. All these can meet the requirements of the medium precision photogrammetry control. The establishment of the frame can provide efective control for close range photogrammetry quick access to the special information of rock mass discontinuities.