海水声速快速高精度测量方法  

Fast and precise measurement method of sound velocity in seawater

作　　者：乔纯捷[1] 王跃科[1] 黄志刚[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《国防科技大学学报》2015年第6期162-166,共5页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61273347)

摘　　要：为实现对海水声速快速、高精度的测量,采用一种系统结构简单的声速测量方案。通过连续波信号参数估计的方法实现了对声传播时间和声速值的测量。采用伪随机序列对连续波进行调制处理,解决了单频连续波信号在测量中存在的整周期模糊与回波干扰问题。通过构建声速试验平台,进行了系统校准与测量试验。试验结果表明该方法具有测量精度高、响应快速的优点,适合于在水下机动平台上对海洋声速剖面进行快速、高精度的测量。The velocity of sound is one of the important acoustic parameters in ocean. For realizing rapid and high-precision measurements of seawater sound velocity, a sound velocity measurement method whose system architecture is simple was adopted. The measurements of sound propagation time and velocity value were achieved by continuous wave signal＇ s parameter estimation method. A pseudo-random sequence was introduced to modulate and handle continuous waves, which overcame the cycle ambiguities and echo interference problems of single-frequency signal in measurement. A sound velocity measurement platform was built to conduct system calibration and measurement experiment. Experiment results show that this method has high accuracy and fast response and is suitable for ocean sound velocity profile measurement on subaqueous mobile platform.

关 键 词：声速 声传播时间 回波干扰 伪随机序列 不确定度 系统校准 

分 类 号：TH73[机械工程—仪器科学与技术]