摘要
为克服传统测量方法信号处理复杂、误差较大以及距离较远时采用无线电遥测同步受电磁干扰较大的缺点,提出一种高精度测量声呐信号传输时间的方法.采用分立声呐接收和声呐发射模块（即双址声呐）,利用双GPS精确授时模块实现声呐信号发射和接收同步,接收模块直接接收发射模块的声波信号,通过声呐信号发射和接收的时间差来确定声呐信号的传输时间.系统采用DSP控制声呐信号的接收,利用可编程逻辑器件测定信号的传输时间.实验结果表明,系统工作稳定可靠,测量精度可达5～10 μs.
A high precision t method of sonar signal transmission time was developed to overcome the disadvantages of complicated signal processing, big error of the traditional measuring method and the great electromagnetic interference to the telemetric synchronization when the distance is far. The transmission and receiving synchronization could be realized. By employing separate sonar signal sending module and receiving module（double-address sonar） and with double GPS high precision timing module, the receiving module could receive the acoustic signal directly. Through the time difference of transmission and receiving sonar signal, the transmission time was measured precisely. Applying DSP the system could control the acoustic signal receiving and measure the transmission time via PLD（programmable logic device）. Experimental results show that the system is stable and has high measurement precision up to 5 - 10 μs.
出处
《大连海事大学学报》
EI
CAS
CSCD
北大核心
2007年第2期53-57,共5页
Journal of Dalian Maritime University
关键词
双址声呐
GPS同步技术
信号传输时间
GPS授时模块
可编程逻辑器件
double-address sonar
GPS time synchronization technology
signal transmission time
GPS timing module
programmable logic device
