Entity Ship Hydraulic Pressure Field Acquiring On High Sea State

The development of three unit array synchronous system for acquiring ship hydraulic pressure field are the main problems in this thesis. The three unit array synchronous system has the higher reliability and the better real time. The system can be used for measuring pressure field of multi-type ships because the space between units is adjustable. The system can reduce the aberration of the hydraulic pressure field by way of equilibrium leading the pressure. The system has longer stand by and work time due to lower power waste device. The real time measuring and displaying for long range can be come true by using RS485 communication interface. It was proved by entity ship hydraulic pressure field test that the system's performance is of stabilization and credibility, it was also proved that the data acquired by the system is true and availability. The system is very practicality for the research of entity ship hydraulic pressure field feature extraction and detection.And we develop the low SNR entity ship hydraulic pressure field feature extraction in this task. It can availably extract pressure field feature by the use of wavelet package, adaptive filter and power spectrum estimate. The SNR can heighten 6dB.