Abstract:
The subject matter of the present patent is a complete or global monitoring and illumination system installed externally on a single point on the aircraft, on a platform that would be called the “base platform”, which includes all the light outlets and all the cameras required for monitoring refuelling operations from a single point on the fuselage. The system is placed in the lower part, under the axis of the fuselage and simultaneously reduces the time required for installation and makes installation less expensive. Thus, assembly or dismantling of the system involves this single structure that includes all that is required for providing the aircraft with a complete viewing system for monitoring in-flight operations.

Description:
OBJECT OF THE INVENTION 
       [0001]    The present invention relates to a viewing system for in-flight refuelling, specifically designed to allow for supervision of the work environment during refuelling tasks, in order to make them comfortable, safe operations. 
         [0002]    The object of the invention is to provide a single-platform global viewing system to perform in-flight refuelling between air vessels or aeroplanes. 
       BACKGROUND OF THE INVENTION 
       [0003]    Currently, when it is necessary to perform in-flight refuelling or similar operations, it is necessary to use a viewing system that makes it possible to supervise the work environment in order to guarantee comfortable, safe operations. This viewing system is made up of a set of cameras and lighting devices dispersed throughout various sites on the exterior of the aeroplane. 
         [0004]    As the number of different sites containing elements of the system increases, the installation thereof becomes more costly, since more tasks are required in order to adapt the exterior of the aeroplane to the desired configuration; more wiring must be set up in the aeroplane and more problems arise when changing the aeroplane&#39;s configuration to a different one. 
         [0005]    The background of the invention includes patents nos. EP 2338028 A1 and EP 2336027 A1, by the same inventor, which disclose a viewing system with the same objectives that fulfils the characteristics described in the first section of this document, but wherein the elements are not arranged in a single block or platform, and, therefore, has the aforementioned disadvantages. 
       DESCRIPTION OF THE INVENTION 
       [0006]    The system proposed herein is conceived to resolve the problems exposed above; to this end, all the elements involved in the system that are applicable to the aeroplane form a single set, even though the wiring is redundant, which allows for replacement of the entire system or the disassembly thereof for calibration, tune-up, repairs, etc. 
         [0007]    I.e., according to the invention, this is a single system formed by one block that incorporates all the elements involved therein, in order to achieve an exterior view when applied to the aeroplane. 
         [0008]    Specifically, the system of the invention, which forms a single block that allows for efficient, safe operation based on good visibility of the operating environment, is made up of a support structure which is attached to the aeroplane, the structure being supplemented with a fairing that improves the aerodynamics of both the system and the components thereof. 
         [0009]    The system proposed herein has 3D panoramic vision and makes it possible to perform inspection tasks by using a zoom. It also provides all the lighting that the system needs when used at night. The system must be supplemented with an internal system wherein the images and the rest of the data collected are processed, in the broadest sense of the word (selection, routing, compression, encryption, decryption, decompression, treatment, enhancement, clarification, improvement, stabilisation, recognition, structuring, recording, reproduction, etc.), in order to be finally shown in one or more monitors or displays. 
         [0010]    It comprises a set of cameras composed of three sub-systems: The 3D cameras, which are made up of two cameras placed in the front of the block, with the potential for day and night 3D vision. They are placed on both sides of the axis of the aeroplane in the direction of flight and at equal distances therefrom on the left and right sides. The distance between them will determine the depth-of-field perception sensitivity and must allow for adequate information about the distances. Moreover, the sub-block that contains them may be regulated by the operator during the flight. 
         [0011]    Behind the 3D cameras, there are two domes with zoom capability, focusing ability and the capacity for horizontal and vertical motion, which not only allow for detailed inspection, but, moreover, may generate an auxiliary 3D image in the event of failure of the main sub-system or any of the components thereof. The arrangement is such that they do not interfere with any of the elements that make up the rest of the viewing system. They are beneath the 3D cameras and behind them in the direction of flight. Thus, they may provide information about any of the refuelling operations, whether boom or hose refuelling operations. 
         [0012]    On the longitudinal axis, a panoramic viewing system is placed which is based on a mechanism similar to that of patents WO 2013054252 A1, US 20130208083 A1 and WO 2013054252 A1. Its mission is to provide a peripheral panoramic view of the work area. The placement of this sub-system prevents geometric interference with any of the remaining elements in the main operating area. It is placed at the centre of the platform and beneath all the cameras placed thereon, as well as behind the 3D cameras in the direction of flight, although not in such a way that the latter cannot see it. 
         [0013]    The lighting sub-system includes one or more lighting elements on each side of the block, designed to illuminate the different areas wherein the different operations take place around the aeroplane. The elements may be similar to those described in U.S. Pat. No. 7,964,847 B2 and US 20110266457 A1, by the same inventor, or be formed by LED arrays with different wavelengths for daytime and night-time operations. 
         [0014]    The system described may or may not include mechanical or electronic stabilisation elements, including an electronic system for the collection and management of the information acquired by the set of external elements, such that the electronic system will include, among other functions, image multiplexing and processing, as well as recording and reproduction of the data collected, to be shown on monitors or displays; the arrangement of the cameras and the viewing angles thereof is such that the portion of said cameras that is seen by the others does not interfere with the operation, acting as a reference within the work environment to visually obtain location data about the aeroplanes involved in the refuelling operation. 
         [0015]    The support structure of the system will be placed on, and attached to, the lower part of the aeroplane, such that all the necessary equipment or elements to perform the refuelling and rearming operations, and other critical operations, whether or not they are similar, may be placed on or attached to said structure. 
         [0016]    The system may be equipped solely with the 3D viewing system, or equipped solely with the panoramic video system, designed to obtain a field of view of over one hundred degrees around the aeroplane on any of the axes thereof, or be equipped solely with the inspection system based on one or more cameras with horizontal and vertical motion, a zoom and focusing. 
         [0017]    Finally, the system may include the necessary lights to illuminate the work area in order to perform critical tasks, such as in-flight refuelling. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0018]    In order to supplement the description made below, and to contribute to a better understanding of the characteristics of the invention, according to a preferred embodiment thereof, a set of drawings is attached to said description as an integral part thereof, where the following is represented for illustrative, non-limiting purposes: 
           [0019]      FIG. 1  shows a representation of a general perspective view of the system of the invention. 
           [0020]      FIG. 2  shows a profile view of the same system represented in the preceding figure. 
           [0021]      FIG. 3  shows a top view of the aforementioned system. 
       
    
    
     PREFERRED EMBODIMENT OF THE INVENTION 
       [0022]    As may be seen in the aforementioned figures, the system of the invention comprises a support structure ( 1 ) for the entire set of elements involved therein, the system being attached and held on to the lower part of the corresponding aeroplane through said structure ( 1 ), supplemented with a fairing ( 2 ) that encompasses said structure ( 1 ). 
         [0023]    Two sub-systems ( 3 ) and ( 4 ) are placed on the same structure, which correspond to two cameras located on the left and right sides, respectively, designed for the generation of 3D views. 
         [0024]    On the other hand, it includes another pair of sub-systems ( 5 ) and ( 6 ) with cameras equipped with horizontal and vertical motion, as well as zoom and focusing, for both 2D and 3D peripheral inspection. 
         [0025]    It also includes a redundant panoramic viewing system ( 7 ), which makes it possible to have a 2D or 3D view of the entire work environment around the global viewing system. 
         [0026]    The aforementioned set of elements and components make up the exterior system, which will be supplemented with an internal electronic system ( 10 ), designed to collect and manage the information acquired by the elements of the exterior set described above. I.e. all the elements described above will be connected to the internal system ( 10 ) through the lines represented by ( 11 ) in  FIG. 3 , in order to perform management tasks on the data received, such as recording, reproduction, selection, routing, treatment, compression, encryption and, in general, all processing of the data received, to be sent to the corresponding monitors or displays ( 12 ), which are logically located inside the aeroplane, where the operator needs to supervise the images and other results.