船舶航行条件下计程仪校准技术  

Calibration of Log under Ship Sailing Condition

作　　者：席勇辉[1] XI Yong-hui(Kunming ship borne equipment research and test centre,Kunming 650051,China)

机构地区：[1]昆明船舶设备研究试验中心,云南昆明650051

出　　处：《宇航计测技术》2019年第B05期72-75,共4页Journal of Astronautic Metrology and Measurement

摘　　要：在受湖面水流影响下,船只的对水速度会与对地速度产生偏差,从而影响测量误差的计算。为满足计程仪的校准要求,应制定合理的方法,消除或减小水流影响引入的测量不确定度。文章分析了水流影响下船只对水速度和对地速度之间的关系,给出了两种校准实施方法。方法一为设置两条呈一定夹角的跑船线路,计算得到对水速度来求航速误差;方法二为采用往返跑船路径,将对地速度的平均值近似为对水速度,并分析了近似处理带来的测量误差。两种方法均可实现水流速影响下计程仪航速误差的校准。The influence of water flow on the lake will cause the deviation between the velocity to water and the geocentric velocity. In order to meet the requirement of calibration,a reasonable method should be developed to eliminate or reduce the measurement uncertainty introduced by water velocity. This paper analyzes the relationship between velocity to water and geocentric velocity under the influence of water flow. Two calibration methods are presented. The first method: set two lines with a certain angle and calculate the velocity to water and the speed error. The second method: to use a return path,which approximates the average geocentric velocity to the relative velocity. And the measurement error caused by approximate treatment is calculated. Both methods can be used to calibrate the speed error of the log under the influence of water flow.

关 键 词：船用计程仪 校准 相对速度 对地速度 不确定度 

分 类 号：U666.16[交通运输工程—船舶及航道工程]