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1. 发明授权

EP0772787B1 A SYSTEM FOR UNDERWATER SURVEY OPERATIONS 失效
标题翻译：系统下WASER SURVEYING营运
公开(公告)号：EP0772787B1
公开(公告)日：1999-10-06
申请号：EP95925754.4
申请日：1995-07-21
申请人： MARIDAN A/S
发明人： BECH, Mogens , BJERRUM, Anders , SHIPPEY, Geoffrey, Arthur
IPC分类号： G01S15/89
CPC分类号： G05D1/0692 , G01S15/88 , G01S15/8904 , Y02A90/36
摘要： A system for underwater survey operations such as sea-bed, ice-mapping or pipeline tracking comprises an autonomous unmanned submarine vehicle having propulsion and steering means (4-8, 10, 11), a navigation system (38) comprising motion sensing and positioning means and an adaptive autopilot system (41) to propagate the vehicle through a predetermined submarine trajectory. A synthetic aperture sonar system (42) includes a sonar transmission and receiving array (43) of a length defining a limited physical aperture arranged on a surface part (32) of the vehicle to capture echo-signals in response to emission of sonar signals through a part of said trajectory defining a synthetic aperture of a length several times greater than said physical aperture. The autopilot system (41) is controlled to register any deviation of the propagation of the vehicle from said trajectory and provide a correspondingly corrected description of the predetermined trajectory within a margin of a fraction of the wavelengh of the sonar signals. Sets of echo signal values captured within said synthetic aperture are stored in memory means (44) and signal processing means (54-57) is provided for processing said stored sets and generating higher resolution image information data corresponding thereto.

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