JPH0523996Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial Application Field>> This invention relates to offshore targets for bombing training.

<Prior Art> A bomb (infrared homing bomb) that recognizes the radiation pattern of far-infrared rays emitted from a ship, sets it as a target, and drops toward the ship while controlling its attitude has been put into practical use.

[Problems that the invention aims to solve] In such infrared homing bomb dropping training, if a small ship is targeted, the infrared homing mechanism will not work because the surface area is small. However, using large target ships for training is expensive.

This idea solves these problems by
The aim is to obtain a small ship that exhibits infrared radiation characteristics similar to those of a large ship.

<Means for solving the problem> The infrared radiation offshore target of this invention includes a twin-hulled hull, a dome-shaped infrared radiation body mounted on the hull, and a means for heating the infrared radiation from inside. , consisting of an infrared transparent film covering the outer panel of the infrared radiator with an air space therebetween.

《Example》 In the drawings, reference numeral 1 indicates a hull with a total length of approximately 20 m having two bodies, and its deck 1a.
A dome-shaped infrared radiator 2 with a diameter close to the entire width of the hull is mounted on top. Infrared emitter 2
Both the frame and the outer panel 3 are made of aluminum.

A hot air supply device 4 is installed on the inner deck of the infrared radiator 2 to keep the temperature of the infrared radiator 2 high (for example, 30 to 80 degrees Celsius higher than seawater) and to radiate strong infrared rays from its outer panel 3. is set up. This hot air supply device consists of six oil-fired air heaters 4a.
It consists of three blowers 4b that blow air to this.

The infrared radiator 2 has an inner wall 5 and a partition plate 6.
The upper and lower parts 6 that are in contact with the inner surface of the outer panel 3 are separated by
Two doughnut-shaped channels 7a to 7f are formed. Then, the hot air is sent from the six air heaters 4a to the corresponding flow path 7 through the air supply duct 8, and after going around the flow path, it passes through the exhaust duct 9.
It returns to the blower 4b. For this reason,
The hot air comes into direct contact with the outer panel 3 of the dome, and the outer panel 3 is efficiently heated. Further, by adjusting the temperature of the hot air supplied for each flow path 7, it is possible to equalize the temperature of the outer panel 3 of the dome.

In addition, when the dome is hit and a hole is made, the outlet of each air heater 4a is connected to all the flow paths 7 and ducts 8 so that heating can be continued using the surviving flow paths.
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By the way, when the wind is strong, the windward side of the dome is cooled by the wind, and the temperature becomes lower than the leeward side, resulting in a decrease in the amount of infrared radiation. In this dome, the outer panel 3 is covered with an infrared transparent (for example, polyethylene) film 11, and an air layer 12 with a thickness of several centimeters is formed between the outer panel 3 and the film 11 (the fourth figure).
This air layer blocks the wind and prevents the outer panel 3 from being cooled by the wind. The reference numeral indicates an aluminum support supporting the membrane 13.

Additionally, reference numeral 10 in the figure is a radar wave reflector.

《Effect》 As explained above, the target of this invention is that since the hull is twin-hulled, a large infrared radiator can be mounted on the wide deck, and by heating it, it can obtain infrared radiation characteristics comparable to that of a large ship. I can do it. In addition, the outer wall of the dome is covered with an infrared-transparent film with an air space in between, so the outer panel is less susceptible to wind chill.
For this reason, a temperature difference is unlikely to occur between the side exposed to the wind and the side not exposed to the wind, and the effect is that infrared rays can be uniformly radiated in all directions.

[Brief explanation of drawings]

The drawings show an embodiment of this invention: Fig. 1 is a side view of an offshore target, Fig. 2 is a plan view, Fig. 3 is a front view, and Fig. 4 is a partial cross-sectional view of an infrared emitter. It is. DESCRIPTION OF SYMBOLS 1... Hull, 2... Infrared radiator, 3... Outer plate, 4... Hot air supply device as heating means, 11
...Infrared transparent membrane, 12...Air layer.

Claims (1)

[Scope of utility model registration request] a twin-hulled hull, a dome-shaped infrared radiator mounted on the hull, a means for internally heating the infrared rays, and an infrared transmitting device that covers the outer skin of the infrared radiator with an air space therebetween. An infrared emitting offshore target consisting of a transparent film.