JPH0120394B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a protection device for a sonar transducer,
More specifically, the present invention relates to a protection device for a sonar transducer that has improved corrosion resistance, vibration resistance, sound resistance, and navigation resistance.

In the first place, the sonar transducer protection device G is attached to the bottom Sa of the ship S to cover the sonar transducer F, which is attached to the bottom Sa of the ship S, as shown in Figure 1, for the purpose of protecting it. There is.

However, as shown in the enlarged cross-sectional front view explanatory diagram in FIG. 2, the conventional sonar transducer protection device G has a framework 1 formed by combining rigid reinforcing materials such as steel or FRP in a lattice shape. A rigid outer plate 2 made of steel, FRP, or the like is attached to the outer surface of the holder.

In this way, the conventional sonar transducer protection device G has a highly rigid structure, so
Vessel vibrations, engine vibrations, etc. are transmitted directly to the protection device G, which not only has a negative effect on the acoustic performance, but also when floating objects such as driftwood collide with the protection device G, the impact is large and can easily cause damage. ,
At present, it is difficult to improve acoustic performance from the constituent materials and structure.

The present invention was developed as a result of studies aimed at solving the above-mentioned problems.

Therefore, an object of the present invention is to provide an excellent protection device for a sonar transducer that can significantly improve corrosion resistance, vibration resistance, acoustic resistance, and navigation resistance.

In other words, the present invention provides a method for attaching a protective cover main body, which is made of a rubber-like elastic body in which a fibrous reinforcing material is embedded, to the bottom of a ship and has a streamlined longitudinal external shape and a substantially semicircular cross-sectional shape. The sonar transducer is attached to the bottom of the ship to cover the sonar transducer, and pressurized water is injected into the protective covering body to maintain the pressure inside the protective covering body at a higher pressure than the outside water pressure. The gist of this invention is a protection device for sonar transducers.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

3 to 8 show a protection device for a sonar transducer according to an embodiment of the present invention, in which FIG. 3 is an explanatory plan view, FIG. 4 is an explanatory side view of the same, and FIG.
The figure is an explanatory cross-sectional view taken along the line A-A in Figure 3, Figure 6 is a perspective explanatory view showing an example of the arrangement of fibrous reinforcing materials, Figure 7 is an explanatory front view of the same as above, and Figure 8 is an illustration of the installation state on a ship. It is a side view explanatory view which shows.

In the figure, E indicates a protection device for a sonar transducer according to an embodiment of the present invention, which is made of a rubber-like elastic body 12 in which a fibrous reinforcing material 11 is embedded. A protective cover main body 10 having a substantially semicircular surface shape is attached to the ship's bottom Sa so as to cover the sonar transducer G attached to the ship's bottom Sa. It is constructed by applying high water pressure.

To further explain this structure in detail, the protective cover main body 10 is shown in FIGS. 3 and 4 in this embodiment.
As shown in the figure, by forming the longitudinal plan view shape and the side view shape into a streamline shape, the longitudinal external shape is streamlined, and as shown in FIG. 5, the cross-sectional shape is It is formed into a substantially semicircular shape to significantly reduce resistance during navigation of the ship.

Further, in this embodiment, as shown in FIGS. 6 and 7, the fibrous reinforcing material 11 is arranged in a direction forming an arc on a plane perpendicular to the streamline direction, and in a direction perpendicular to this. . Therefore, it has good shape stability, can withstand fluctuations in external water pressure, and is easy to manufacture.

Furthermore, in this embodiment, the fibrous reinforcing material 11 includes aromatic polyamide fibers, nylon fibers,
A cord is used in which flexible materials such as polyester fiber, rayon fiber, or steel filament are twisted together, and materials that have relatively little influence on acoustic performance, singly or in combination, are used for the rubber-like elastic body 12. , vulcanizable natural rubber, or vulcanizable BR, CR, NBR, SBR,
Synthetic rubbers such as IIR and EPDM are used.

Therefore, it is possible to obtain a high-performance protection device with low sound transmission loss and reflection loss, and it is also highly flexible, and the vibrations of the hull, engine vibration, etc. are not directly transmitted to the protection device E, resulting in a high-performance protection device with low acoustic transmission loss and reflection loss. It is possible to obtain a protective device that does not adversely affect performance and is less likely to be damaged because it can alleviate the impact even when floating objects such as driftwood collide with it.

Further, in this embodiment, the protection device E is attached to the ship S by attaching a bead portion 13 integrally formed around the opening of the protective cover body 10 to a mounting portion protruding from the bottom Sa of the ship S. This is done by detachably attaching it to the Sb.

Furthermore, in this embodiment, as a means for maintaining the water pressure inside the protective cover body 10 at a pressure higher than the outside water pressure, as shown in FIG. 5, a water tank (T) 20 is installed on the hull, for example, on the deck. There is a means for supplying water from the water tank 20 to the inside of the protective cover body 10 while pressurizing the pump (P) 22 and maintaining the pressure at a predetermined level.

As described above, the present invention includes a protective covering body made of a rubber-like elastic body with a fibrous reinforcing material embedded therein, and having a streamlined longitudinal external shape and a substantially semicircular cross-sectional shape, which is attached to the bottom of a ship. Attached to the bottom of the ship to cover the attached sonar transducer,
Since a water pressure higher than the outside water pressure is applied to the inside of the protective covering body, (a) a high-performance sonar transducer protection device with low acoustic transmission loss and low reflection loss can be obtained;

(b) Prevents ship hull vibrations, engine vibrations, etc. from being directly transmitted to the protection device E, does not adversely affect acoustic performance, and also reduces the impact even if floating objects such as driftwood collide with it. Therefore, it is possible to obtain a protection device for a sonar transducer that can be easily damaged.

(c) It is possible to obtain a protection device for a sonar transducer that can significantly reduce resistance during navigation of a ship.

(d) It is possible to obtain a protection device for a sonar transducer that is highly corrosion resistant and can be used for a long period of time.

[Brief explanation of drawings]

1 and 2 show a conventional protection device for a sonar transducer, FIG. 1 is an explanatory side view showing how it is installed on a ship, and FIG. 2 is an explanatory enlarged sectional front view, 3 to 8 show a protection device for a sonar transducer according to an embodiment of the present invention, in which FIG. 3 is an explanatory plan view, FIG. 4 is an explanatory top side view, and FIG. Figure 3 A-A cross-sectional explanatory diagram,
FIG. 6 is a perspective explanatory view showing an example of the arrangement of the fibrous reinforcing material, FIG. 7 is a front view explanatory view of the same as above, and FIG. 8 is a side view explanatory view showing how it is attached to a ship. 10... Protective covering body, 11... Fibrous reinforcement material, 12
...Rubber-like elastic body, S...Ship, Sa...Ship bottom, F...Sonar transducer.

Claims (1)

[Claims] 1 The sonar wave transmitting/receiving device has a protective covering body made of a rubber-like elastic body with embedded fibrous reinforcing material, and has a streamlined external shape in the longitudinal direction and a roughly semicircular cross-sectional shape, and is attached to the bottom of the ship. A sonar transmitter/receiver characterized in that the sonar is attached to the bottom of the ship so as to cover the sonar, and pressurized water is injected into the inside of the protective cover body to maintain the water pressure inside the protective cover body at a higher pressure than the outside water pressure. Wave protection device.