JPH0715220A - Airship for air patrol - Google Patents

Abstract

PURPOSE:To improve flight stability, to eliminate necessary pressurization for preventing discharge in a radar antenna and to simplify the configuration of a radar antenna system by housing the radar antenna for search inside the main body of the airship. CONSTITUTION:A main body 1 of the airship composed of plural gas bags 3 using the materials of satisfactory radio wave transmissivity houses a radar antenna 4 for search inside one of plural gas bags 3. The radar antenna 4 for search can search all the directions by turning with a turn shaft 4' as a center. This airship makes search possible while staying at one position without requiring any fuel excepting for correcting the position flowing with wind. On the other hand, since the radar antenna 4 for search is housed inside the main body 1 of the airship, there is no projection and aerodynamic stability is improved. Further, it is not necessary to pressurize the radar antenna 4 for search for preventing the discharge, and the configuration of the radar antenna system can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airship used for aerial security.

[0002]

2. Description of the Related Art As shown in FIGS. 4 (a) and 4 (b), a conventional aerial security aircraft has a radome 6 attached to the outside of an airship body 1 or a fixed wing aircraft 7 for housing a search enemy radar antenna 4. It has a structure, and the radome 6 is a protrusion.

[0003]

In order to perform aerial warning, it is necessary to search for a long time at almost the same point. However, in the above-mentioned conventional aerial security aircraft using a fixed wing aircraft, it is necessary to always make a turning flight in order to search at the same point, and fuel is consumed for the flight. Aerial warning is impossible. Further, in the above conventional aerial alert aircraft that uses an airship equipped with a radome that stores a search radar antenna outside the airship body,
Due to the shape, the aerodynamic stability is poor and the search may be hindered. Furthermore, when a balloon is used for aerial alerting, it is not possible to fly by itself and aerial alerting at the same point is not possible.

The present invention is intended to provide an airborne airship capable of solving the above problems.

[0005]

An airborne airship for aerial security according to the present invention is characterized in that a search radar antenna is housed in the airship body.

[0006]

In the present invention, since an airship is used, essentially no fuel is required to search at the same point. However, a small amount of fuel is required to correct the amount of air flow, but it is significantly less than in the case of fixed-wing aircraft. In addition, since the search radar antenna is housed inside the airship body, there are no protrusions and good aerodynamic stability.

Further, since the search radar antenna is housed in the body of the airship, it is not necessary to apply pressure to the radar antenna (including the waveguide) to prevent discharge, and the radar antenna system The configuration is simplified.

In the present invention, since the search radar antenna is housed in the body of the airship, the frame and gas bag of the body of the airship have radio waves such as fiber reinforced plastics (hereinafter referred to as FRP) and polyethylene. A material having excellent transparency is used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. An airship body 1 including a frame 2 made of a material having excellent radio wave transmission such as FRP and a plurality of gas bags 3 made of a material having excellent radio wave transmission such as polyethylene is one of the plurality of gas bags 3. The search radar antenna 4 is housed in one of them. The search enemy radar antenna 4 rotates around the rotation axis 4 ', and is capable of performing a search in all directions. Reference numeral 5 is a gondola mounted on the airship body 1 for mounting passengers and equipment, and 8 is a propulsion device mounted on the airship body 1.

In this embodiment, since the airship is used,
You can stay in the same spot and search without needing any fuel other than to correct the amount that is blown by the wind. Also,
Since the search radar antenna 4 is housed in the airship main body 1, there is no protrusion and the aerodynamic stability is good, and it is not necessary to apply pressure to the search radar antenna 4 to prevent electric protection. The configuration of the antenna system can be simplified.

A second embodiment of the present invention will be described with reference to FIG. The search radar antenna 4 is fixed inside the airship body 1 having the same configuration as that of the first embodiment and does not rotate. Instead, one set of propulsion devices 8 is provided on the left and right sides of the airship body 1 to generate thrust b thereof in mutually opposite directions, and the airship body 1 itself is turned (yawed) as shown by an arrow a to the entire circumferential direction. It is supposed to search for.

The present embodiment can obtain the same operation and effect as the first embodiment, but the rotation of the search radar antenna 4 in the first embodiment is stopped due to a failure or the like, and the omnidirectional rotation is performed. The search for is never impossible.

A third embodiment of the present invention will be described with reference to FIG. In this embodiment, a large number of small radar antennas 9 each having a waveguide 10 are arranged on the circumference, and this antenna group is used as a search radar antenna 4. The radar antenna 4 is housed and fixed in the airship body 1 having the same structure as that of the first embodiment.

The present embodiment can obtain the same operation and effect as those of the first and second embodiments, but the search radar antenna 4 can be used in all circumferential directions without rotating itself. Since the search can be performed, it is not necessary to rotate the search radar antenna or the airship body as in the first and second embodiments, and mechanically movable parts are not required. Therefore, the reliability of the search radar antenna 4 can be improved, and the search can be instantaneously performed in the entire circumferential direction, so that the search efficiency is improved.

[0015]

Since the present invention uses an airship,
It requires less fuel for flight, and because the search radar antenna is housed inside the airship body, it has no protrusions and is excellent in flight stability. Further, since the radar antenna is housed in the airship body, it is not necessary to apply pressure to the radar antenna (including the waveguide) to prevent discharge, and the structure of the radar antenna system is simplified. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a first embodiment of the present invention in a cutaway manner.

FIG. 2 is an explanatory diagram of a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a main part of a third embodiment of the present invention.

FIG. 4 is an external view of a conventional airborne alert aircraft, and FIG.
Shows the case of using an airship, and FIG. 4 (b) shows the case of using a fixed-wing aircraft.

[Explanation of symbols]

 1 Airship Main Body 2 Frame 3 Gas Bag 4 Search Radar Antenna 5 Gondola 6 Radome 7 Fixed Wing Aircraft 8 Propulsion Device 9 Small Radar Antenna 10 Waveguide

Claims (1)

[Claims] 1. An airship for aerial security, wherein a radar antenna for searching is housed in the body of the airship.