【摘要】 声相关计程仪是一种新型的测速声纳，其作用距离大，测量精度高，是理想的测速仪器；但是，空间相关计程仪并不是对任何时延都能测量出船只的航速。本文从理论上分析了造成这种现象的原因，找出了可以选取的时延的大致范围，并用计算机软件进行了仿真，最后通过实验得到了证明。更多还原

【Abstract】 An acoustic correlation log with great operating depth and high measurement preci-sion is a new type of velocity determination sonar, and also it is a ideal velocity measurementapparatus; but spatial correlation log can not measure the velocity of ship for all tine-delay.Theoretical analysis was presented to explain the cause of the phenomenon, the availablescope of time-delay was obtained, and computed simulation was provided, finally it’sdemonstrated by experiment.更多还原