JP3127055B2 - Stacked transducer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked transducer used for measuring the depth of the seabed.

[0002]

2. Description of the Related Art Conventionally, as a laminated type transducer of this kind,
As shown in FIG. 7, a large number of circular plate-shaped vibrators b each having an opening angle of α on the left and right of the center line a are stacked in a row in the thickness direction of the paper, and the radiation surface of the circular plate-shaped vibrator b is stacked. A laminated type transducer is known in which a back surface d and both end surfaces e other than c are covered with a sound insulating material and covered with a molding material.

[0003] In such a laminated type transducer, in order to transmit and receive waves with high directivity for depth measurement, the uniformity of the lamination pitch interval of the arcuate plate-like vibrators b and the arcuate plate-like vibrators are required. Assembling accuracy such as the parallelism between b and the uniform radiation plane c of the circular plate vibrator b is required.

In order to satisfy the above-mentioned required assembly accuracy, groove members are provided at both end portions e of the circular plate vibrator b, and the groove members are fixed at predetermined positions. e was fitted into the groove member.

[0005]

However, instead of laminating a single circular plate-shaped vibrator as shown in FIG. 7 as a laminated type transducer for depth measurement, as shown in FIG. 1 (a). In addition, it has been found that the accuracy of depth measurement is improved by stacking a pair of equiangular arc plate vibrators arranged in a symmetrical bent shape on the left and right sides of the center line. In this case, the above-mentioned required accuracy can be obtained for each of the pair of circular plate-shaped vibrators, and the center position accuracy of the pair of equiangular circular plate vibrators can also be obtained. for that reason,
As in the past, with only the structure of the groove members at both ends,
There has been a problem that the required assembly accuracy cannot be secured for a pair of conformal arc plate vibrators.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to replace a single circular plate-shaped vibrator with a pair of conformal circular plates. It is an object of the present invention to provide a stacked type transducer in which vibrators are arranged in a symmetrical bent shape symmetrically to the left and right of a center line, and a stacked type transceiver capable of securing high assembly accuracy is provided.

[0007]

In order to achieve the above object, a laminated type transducer according to the present invention comprises a plurality of circular plate-shaped vibrators laminated in a row, and a portion other than a radiation surface is covered with a sound insulating material. I
In the laminated type transducer that is covered with the mold material, the arcuate plate-shaped vibrator is configured by arranging a pair of equiangular arcuate plate vibrators in a symmetrical bent shape symmetrical to the left and right of the center line. A fixed base that is in close contact with the back surface of the vibrator through a sound insulating material is provided, and the fixed base is connected to the back surface through the sound insulating material.
It is obtained along a.

Then, a large number of circular plate vibrators are arranged in a row.
Laminated, covered other than radiation surface with sound insulation material, covered with mold material
In the stacked laminated transducer, the circular plate vibrator is a pair of
The conformal arc plate resonator is bent symmetrically to the left and right of the center line.
The isometric circular plate vibrator.
A fixed base that is in close contact with the back surface of the isometric sound-insulating material is provided , a groove member is provided at a bent portion and both ends of the isometric circular plate vibrator, and the isometric circular plate vibrator is fitted into the groove member. Some of them are stacked in rows at equal intervals. Also, in this case,
There is a device in which a wedge member is inserted into a bent portion of the conformal arc plate vibrator.

[0009]

[Function] A fixed base is provided on the back of a circular plate-shaped vibrator formed by a pair of equiangular circular plate vibrators butted in a symmetrical bent shape to the left and right of the center line. By conforming to the shape of the table, the center position accuracy of the pair of equiangular arc plate vibrators is ensured.

Further, by providing the groove members not only at both end portions but also at the bent portions of the conformal arc plate vibrator, uniformity of pitch interval can be obtained for each of the pair of conformal arc plate vibrators. Parallelism and uniformity of the emitting surface are ensured. Further, when a wedge member is inserted into a bent portion of the conformal arc plate vibrator, the bend portion of the conformal arc plate vibrator, which tends to be unstable, is securely fixed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a laminated type transducer according to the present invention, and FIG. 2 is a front view of the laminated type transducer.

As clearly shown in FIG. 1B, a pair of equiangular plate vibrators 1 and 2 having a predetermined equal opening angle α (60 ° in the illustrated example) form an arc plate vibrator. Have been. The equiangular arc plate vibrators 1 and 2 are arranged symmetrically with a small gap ε on the left and right of the center line 3. Further, the centers O1 and O2 of the conformal arc plate vibrators 1 and 2 are arranged to intersect at the left-right symmetric position of the center line 3, and
Reference numeral 2 denotes a bilaterally symmetric bent shape of the center line 3, and a bent portion 4 is formed at the center.

FIGS. 1 and 2 show the conformal arc plate vibrators 1 and 2.
2 will be described as a whole. Groove members 12, 13, 14 are provided on the lower surface at the center and the lower surfaces at both ends of the base 11.
Are fixed by bolts or the like, and fixed bases 15 and 16 are located between the groove members 12 and 14 and between the groove members 13 and 14, and the base 1
1 is fixed with bolts or the like. In addition, backing plates 17, 18 are fixed to both side surfaces of the base 11 with bolts or the like (see FIG. 2). The conformal circular plate vibrators 1 and 2 are in close contact with the surfaces of the fixed bases 15 and 16 via the sound insulating materials 19 and 20, and the groove members 12 at both ends and the bent portions of the conformal circular plate vibrators 1 and 2. , 13, and 14 are positioned. The above-mentioned assembly is completely covered with a molding material 21 such as polyurethane rubber.

In particular, the fixing bases 15 and 16 have arcuate surfaces having a radius R2 with respect to the centers O1 and O2 which completely match those shown in FIG. The radius R2 of the arc surface is equal to a value obtained by subtracting the thickness of the sound insulating members 19 and 20 from the inner radius R1 of the conformal arc plate vibrators 1 and 2. Therefore, the arrangement of the conformal arc plate vibrators 1 and 2 having the symmetrical centers O1 and O2 of the center line 3 only by making the conformal arc plate vibrators 1 and 2 along the surfaces of the fixing bases 15 and 16 can be achieved. And the radiation surfaces of the conformal arc plate vibrators 1 and 2 are aligned.

Next, details of the groove member will be described. First, the structure of the groove member 14 at the bent portion will be described with reference to FIGS. A slit 14a is formed in the groove member 14,
A partition plate 14b made of epoxy resin or the like having sound insulation properties is press-fitted into the slit 14a. By the groove member 14 and the partition plate 14b, grooves δ having the same pitch P and the same interval are formed. The bent portions of the conformal arc plate vibrators 1 and 2 are fitted into the groove δ via the sound insulating material 22. 6, the structure of the groove members 12, 13 at both ends of the conformal arc plate vibrators 1, 2 will be described. Groove members 12, 13
The slits 12a and 13a are machined into the slits, and partition plates 12b and 13b made of epoxy resin or the like having a sound insulating property are press-fitted into the slits 12a and 13a. Groove member 1
2, 13 and the partition plates 12b, 13b form grooves δ at an equal pitch P and at equal intervals. Both ends of the conformal arc plate vibrators 1 and 2 are fitted into the groove δ via the sound insulating material 23.

The grooves δ of the groove members 12, 13, 14 are preliminarily machined with high precision, and the groove members 12, 13, 14 are formed on the base 11.
Are fixed so that the pitch is uniform. When both ends and bent portions of the conformal circular plate vibrators 1 and 2 are fitted into the groove δ, the uniformity of the equiangular circular plate vibrators 1 and 2 pitch spacing, the parallelism, and the uniformity of the uniformity of the radiation surface are improved. Secured.

Next, means for fixing the bent portions of the conformal arc plate vibrators 1 and 2 will be described with reference to FIGS. Since the circular plate vibrators are formed by butt-bending the conformal circular plate vibrators 1 and 2, the central bent portion is likely to be a weak point. Therefore, a triangular spacer 24 made of a sound insulating material such as cork is located in the space of the bent portion. Further, a slit 24a is provided in the spacer 24, and a plate material 25 is inserted into the slit 24a. That is, the spacer 24 and the plate 25
Are not just spacers, they become wedge members. With the spacer 24 in a predetermined position, the plate material 25
Is inserted and pushed right and left, and the plate material 25 is fixed with an adhesive or the like. Then, the left and right equiangular arc plate vibrators 1 and 2 are pressed against the groove members at the both ends and the bent portion, and are fixed while maintaining the shape along the fixing table, so that loosening does not occur.

[0018]

According to the laminated type transducer of the present invention, a sound insulating material is provided on the back surface of a circular plate-shaped vibrator formed by butting a pair of equiangular circular plate vibrators symmetrically to the left and right of the center line. A fixed base that is in close contact with the base is arranged, and the center position accuracy of a pair of conformal arc plate vibrators is ensured by following the shape of the fixed base. High required assembly accuracy can be easily obtained.

In the laminated type transducer, each of the pair of equiangular arc plate vibrators is provided with a groove member not only at both end portions of the equiangular arc plate vibrator but also at a bent portion thereof. For, the uniformity of the pitch interval, the parallelism and the uniformity of the radiation surface are to be ensured,
Similarly, a high required assembly accuracy for a vibrator having a complicated shape can be easily obtained. Also, when a wedge member is inserted into the bent portion of the conformal arc plate vibrator, the bend portion of the conformal arc plate vibrator, which tends to be unstable, is securely fixed, so that it is stable for long-term use. It will be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a laminated type transducer according to the present invention.

FIG. 2 is a front view of a stacked type transducer.

FIG. 3 is an enlarged view of a portion A in FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a view showing a wedge member.

FIG. 6 is a sectional view taken along line CC of FIG. 1;

FIG. 7 is a view showing a conventional laminated type transducer.

[Explanation of symbols]

 1, 2 conformal arc plate vibrator 3 center line 12, 13, 14 groove member 15, 16 fixing base 19, 20, 22, 23 sound insulation material 21 molding material 24 spacer (wedge member) 25 plate material (wedge member)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01S 7/521 H04R 17/00 332

Claims (3)

(57) [Claims] 1. A laminated type transducer in which a large number of circular plate-shaped vibrators are laminated in a row, and the radiation surface is covered with a sound insulating material and covered with a mold material. The equiangular arc plate vibrator is abutted and arranged in a symmetrical bent shape symmetrically to the left and right of the center line, and a fixed base that is in close contact with the back surface of the isometric arc plate vibrator via a sound insulating material is provided , back
Characterized by being arranged along the fixed base via the sound insulating material . 2. A large number of circular plate vibrators are stacked in a row.
And the other than the radiation surface was covered with sound insulation material and covered with mold material
In the stacked type transducer, the circular plate-shaped vibrator is a pair of equiangular
Project the circular plate vibrator in a bent shape symmetrical to the left and right of the center line.
Which are arranged in close contact with each other, and
A fixed base that is in close contact with the surface via a sound insulating material is provided , groove members are provided at the bent portion and both end portions of the isometric circular plate vibrator, and the isometric circular plate vibrator is fitted into the groove member. 1. A stacked type transducer according to claim 1, wherein the stacked transducers are stacked in a row at equal intervals. 3. The laminated transducer according to claim 2, wherein a wedge member is inserted into a bent portion of the conformal arc plate vibrator.