顾及水深的单波束测深系统误差改正方法

为解决单波束测深系统利用单一延迟值改正往返断面位移精度低的问题,在分析单波束测深系统误差产生原理基础上,得出往返断面位移是由系统延迟引起的固定差和换能器偏角引起的与深度相关比例误差共同作用的结果,通过建立水深与往返断面位移之间的数学模型,证实水深与断面位移具有极高相关性。利用求取单波束系统延迟及换能器偏角参数,对同一测深系统各断面形态断面进行位移改正,断面往返测数据具有良好的吻合性。证实顾及水深的单波束系统往返断面位移改正方法具有良好的系统适用性,能提高测深精度。

Error correction method of single beam bathymetric system considering water depth

In order to solve the problem that the single beam sounding system uses a single delay value to correct the back and forth section displacement and the accuracy is low.Based on the analysis of the principle of single beam sounding system error,it is concluded that the back and forth section displacement is the result of the fixed error caused by the system delay and the depth related proportional error caused by the transducer deflection angle.By establishing the mathematical model between the water depth and the crosssection displacement,it is proved that the water depth and the crosssection displacement have a high correlation.By using the parameters of delay and transducer deflection angle of single beam system,the displacement correction of each cross-section of the same sounding system is carried out,and the cross-section round-trip survey data are in good agreement.It is proved that the single beam system displacement correction method considering water depth has good system applicability and improves sounding accuracy.