用动态水平基准测量系统实时测量船体横扭角和纵挠角

Real-time measurement of ship′s transverse and vertical twist angles by dynamic horizontal datum measuring system

设计了动态实时水平基准测量系统,讨论了用该测量系统测量远望号测量船变形角的可行性及利用该系统测量船体横扭角和纵挠角的原理和误差项。依据测量船的实际需要确定了动态水平基准测量系统的关键技术指标,并分析了测量船体横扭角和纵挠角的测量精度。分析结果表明:系统对船体横扭角和纵挠角的测量误差均不大于3″,测量距离理论上不受任何限制,远大于200m(测量船船体长度)。利用现有外场试验条件进行了码头停靠状态下远望号测量船两测量点间的船体横扭角和纵挠角测量试验,结果表明:利用动态水平基准测量系统实时测量船体横扭角和纵挠角的方法切实可行,不仅提高了测量精度,而且克服了传统的大钢管基准测量法体积大、重量沉,装调及维护困难等缺陷。实验显示,该动态实时水平基准测量系统的应用领域相对广泛。

A dynamic real-time horizontal datum measuring system was designed and the feasibility of the measurement system used to measure the twist angles of Yuan Wang tracking ship was discussed.Then the measuring principle and the measuring errors of the system when it measured transverse and vertical twist angles were analyzed.According to the measuring demands,the key technical specifications were determined and the measurement accuracies on transverse and vertical twist angles were analyzed.The analyzed results show that the measurement errors for transverse and vertical twist angles of the measurement ship are not more than 3″,and the measuring distance is without any restrictions in theory,much longer than 200 m（the length of Yuan Wang surveying vessel）.A measuring experiment was performed on the transverse and vertical twist angles of the Yuan Wang tracking ship when it is a docking state,results show that the proposed method is feasible,and it can not only increase the measurement accuracy,but also overcomes the drawbacks from the traditional large steel pipe based the method.It is characterized by compact dimensions,lower weights and wider application fields.