| 摘要 |
1. A system for carrying out marine operations, such as seismic surveys, comprising a surface vessel (1) associated with part of a unit for the transmission and reception of sound waves and at least one secondary self-propelled surface vehicle (6) associated with another part of the said unit for the transmission and reception of sound waves, the system comprising a means of navigation including a radar system (5, 8, 10) located on the vessel (1) in order to identify the position of each secondary vehicle (6) relative to the vessel (1) and in order to determine the position of the said vessel, together with a remote control radio device designed to prepare signals relating to the course and speed, transmit these and apply them to each secondary vehicle (6), the said device comprising a first unit (E1) on the vessel (1) and including a first means of programmable data processing (15, 17, 18) which is connected to a first radio transmission-reception unit (16) and also including a second unit (E2) on each secondary vehicle (6) which includes a second means of programmable data processing (19) to convert the messages to be exchanged with the said first unit (E1) in co-operation with a second radio transmission-reception unit (20), characterised in that : the navigation device co-operates with a third means of programmable data processing (12-14) included in the said first unit (E1) in order to prepare signals relating to the course and speed to be imposed on each secondary vehicle (6) from echoes provided by the radar system and in terms of the servo control conditions imposed and in that : the remote control radio device monitors the status of the equipment for each secondary vehicle (6), the said first means of programmable data processing (15, 17, 18) being connected to the said third means of programmable data processing (12-14) in order to convert and code the messages to be transmitted to each secondary vehicle (6) and to convert and decode the messages received from this unit and the said second unit (E2) carrying out the remote control operations under the control of the said first unit (E1) and in that : the remote control radio device includes an automatic pilot (21) connected to the said second means of programmable data processing (19) and situated in the said second unit (E2) in order to generate error signals, a means of switching (24) for the application of power to the navigation devices on each secondary vehicle (6), including the propulsion units for the said vehicles, the said second unit (E2) including an interface unit (23) for converting the status and alarm signals transmitted by the various sensors on board each secondary vehicle (6) before their application to the said second means of programmable data processing (19) and their transmission to the said first means of programmable data processing (15, 17, 18) on the said vessel (1). |
