JPH0354473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the configuration of a reflector for an underwater ultrasonic transducer having a curved reflecting surface.

[Conventional technology]

As a transducer of this type, a method was developed in which a parapolar curved surface was used as a reflecting surface and a vibrator was placed at the focal point of this curved surface, and was developed in 1983 by Utility Model Application No. 11253. Japanese Utility Model Publication No. 51-12103 discloses a method in which a vibrator is provided in a reflector made by sandwiching a shaped reflector plate and a soundproof plate.

[The problem that the idea aims to solve]

However, in the above-mentioned well-known means, since the back side of the reflective curved surface is a void in the former one,
It is susceptible to deformation due to waves in the water, installation and removal work when it is mounted on the side, and loading work during transportation. In order to avoid this deformation, it is necessary to make the reflection plate 1 sufficiently strong.

Therefore, the wall thickness of the plate material forming this part must be made considerably thicker, and as a result, the overall weight increases and the product becomes heavy.

This weight also makes it difficult to work, increases the impact force when it hits another object, and in order to withstand it, it has to be made even stronger, making it even heavier. There is this inconvenience.

Also, if you want to make a curved surface with good reflection efficiency like the former, and a sturdy one like the latter by stacking three members, each of these three members should all be formed into a curved shape. , and in order to form these so that they are sandwiched, it is necessary to create molding tools with different curvatures corresponding to the thickness of each member, which results in extremely high costs. There is the inconvenience of putting it away.

The problem was to provide a transducer that solves these disadvantages.

[Means to solve the problem]

This idea uses two reflective mirrors of the same size as the upper and lower surrounding plates, closes the edges to form a gap, and fills this gap with small pieces of reflective material. The above-mentioned problem can be solved by means of this method.

〔Example〕

Examples will be described below with reference to the drawings.

In Fig. 1, 1 is an ultrasonic transducer, 2 is a reflector, and 3 is a support frame that fixes and holds the ultrasonic transducer 1 in the center. In order not to impede the passage of ultrasonic waves, the area occupied by the reflector 2 relative to the front surface area is considered to be as small as possible, and furthermore, the end thereof is fixed to the outer end of the front edge of the reflector 2. 4 is a flange, which is fixed to the reflector 2 with bolts 5.
A holding tube 6 is connected and fixed to the flange 4, and is also held and fixed to an external transducer support (for example, on the side of a ship). Reference numeral 7 denotes a leader line that supplies power for driving the ultrasonic transducer.

FIG. 2 is a cross-sectional view of the reflector 2 of the present invention, in which 2a and 2b are reflectors having the same shape and dimensions and arranged vertically at intervals, and a hole 2a' in the center for passing the leader line 7, respectively. , 2b' are provided. 2c and 2d are the outer and inner rings, respectively, and the front and rear reflectors 2
It is adhesively fixed to the outer and inner edges of a and 2b. still,
2b'' is a screw hole for joining and fixing the reflector 2 to the flange 4 with a bolt 5 via a spacer 2f.

Further, the outer edge ring 2c is provided with an appropriate number of small holes 2c' for filling with small pieces of reflective material (for example, closed-cell sponge, etc.).

[Effects of the invention] According to the invention, firstly, two reflecting mirrors of the same size are used for the upper and lower surrounding plates, so the molding tool used for manufacturing can be used in one mold. It can be done cheaply because it can be done easily. Secondly, since the voids are filled with small pieces of reflective material, dents and deformations caused by external forces can be reduced even if the reflective mirror is made of a thin material, so the overall structure can be made lightweight.

Therefore, heavy labor is reduced when installing and removing equipment when it is installed on the side of the ship, or during loading work during transportation, and the shape of the reflective curved portion is resistant to wave impact underwater and impact during transportation. It is possible to provide something that is less susceptible to deformation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view and a front view of a transducer according to the present invention, and FIG. 2 is a cross-sectional view of a reflector according to the present invention. 1... Ultrasonic transducer, 2... Reflector, 2a...
Front reflector, 2a'...hole, 2b...rear reflector,
2b'...Hole, 2b''...Threaded hole, 2c...Outer edge ring, 2c'...Small hole, 2d...Inner edge ring, 2e...
...Reflector, 2f...Spacer, 3 Support frame, 4...
Flange, 5... Bolt, 6... Holding tube, 7...
Leader line.

Claims (1)

[Claims for Utility Model Registration] In an underwater ultrasonic transducer having a structure in which an ultrasonic transducer is arranged at the focal point of the curved surface of a reflector having a curved reflective surface, the reflector has two identical Reflecting mirrors each having a curved surface shape are spaced vertically with their axes aligned, and a gap is formed by closing the periphery of these two reflecting mirrors, b. Filling the gap with small pieces of reflective material. A transducer characterized by having a structure.