摘要
在影响多普勒计程仪测速精度的多种因素中,以声速的影响为最大。多普勒计程仪的高精度必须建立在良好的声速补偿措施上,本文就双波束工作方式的多普勒计程仪从原理上分析声速变化对测速精度的影响,并介绍了一种新的补偿声速的方法:声学透镜法,它能在换能器自身结构得以完善的同时补偿声速,保证系统的测速精度。
Among the factors which affect the accuracy of Doppler log, the speed of sound is the most important one. Therefore, Doppler log should have good compensating meassures to keep high accuracy. This article analyses the influence of the speed of sound upon the accuracy of log according to the principle of dual-beam Doppler log and introduces a new method for the compensation of the speed of sound—acoustic lens method—which compensates the speed of sound by improving the structure of transducer so that to ensure the accuracy.
关键词
多普勒声纳
测速精度
声波
声速
Doppler sonar, measure accuracy, wave of sound, acoustic lens, beam conduct
