换能器动态吃水改正数测定及精度分析

Measurement and precision analysis of dynamic draft correction of bathymetric transducer

现行水深测量规范对动态吃水测定方面都提出了相关要求和测量方法,但都缺少对动态吃水测定结果的精度分析。为此,提出一种新型的测量船舶测深仪换能器动态吃水改正数测定及精度分析方法。该方法主要结合定位仪、测深仪、姿态传感器、潮位数据,通过船舶静漂和顺水、顶水不同船速场景下扩大采集数据样本,并对采集样本进行精度评定。通过实际测试,换能器动态吃水改正数达到厘米级精度,该方法是可行的。该方法操作便捷,测定精度可靠,成果得到保证,是对现行规范的有益补充。

The current hydrographic survey standards have put forward the relevant requirements and measurement methods for dynamic draft measurement,but they lack the precision analysis of dynamic draft measurement results.Therefore,this paper presents a new method for measuring and analyzing the accuracy of the dynamic draft correction of the transducer of the bathymetric sounder.This method mainly combines the navigation instrument,bathymetric sounder,attitude sensor and tide data to expand the data samples collected under different ship speed scenarios of static drift,downstream water,reverse flow of water,and evaluate the accuracy of the collected samples.Through the practical test,the accuracy of the transducer's dynamic draft correction reaches centimeter level,and the method is feasible.This method is convenient to operate,accurate and reliable,and the results are guaranteed.