摘要
在大深度测量环境下,温度和深度是对波速有较大影响的2个量。通过分析液体的声学特性,得出超声波水下传播的速度与温度、深度之间的数学关系;通过对多径传播途径的建模分析,指出多径效应会使信号发生衰落和相移,并使得回波信号的波形发生改变;提出了基于椭圆坐标系的补偿方法并进行了试验。结果表明,该方法可有效减少多径信号对直射信号的干扰和回波信号的失真,减小测量误差。
In the environment of large depth measurement,temperature and depth are two factors which have great influence on wave velocity.Through the analysis of the acoustic characteristics of liquid,the mathematical relationship between the velocity of ultrasonic underwater propagation and temperature and depth is obtained.Through the modeling and analysis of multipath propagation path,it is pointed out that multipath effect will cause signal fading and phase shift,and change the waveform of echo signal.A compensation method based on elliptic coordinate system is proposed and tested.The results show that the method can effectively reduce the interference of multipath signal to direct signal and the distortion of echo signal,and reduce the measurement error.
作者
何鸣飞
王利恒
HE Ming-fei;WANG Li-heng(School of Electrical and Information Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《自动化与仪表》
2020年第12期63-67,共5页
Automation & Instrumentation
关键词
超声波测距
误差补偿
大深度
温度
水下
多径效应
ultrasonic ranging
error compensation
large depth
temperature
underwater
multipath effect
