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JPS5551533

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DESCRIPTION JPS5551533
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view partly lacking a jacket of a
conventional hydrophone array, and FIG. 2 is a perspective view of an embodiment of the present
invention. 4 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · cylindrical hole.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semi-circular
hydrophone, and in particular to the shape of a hydrophone suitable for mounting it on a
strength member of a hydrophone array. Conventionally, a large number of hollow cylindrical
hydrophones 2 are disposed in a hose-like jacket 1 as shown in FIG. 1 as an array cable of a
horizontal expansion type sonar, and a strength member 4 is penetrated through the central hole
3 of the hydrophone. A structure is proposed in which oil 5 is filled in the jacket 1. However, in
an array of such structure, there is a risk that many other normal hydrophones must be removed
when replacing the hydrophone 2 due to a failure. The object of the present invention is to
provide a semi-circular hydrophone which eliminates the above-mentioned inconvenience in the
prior art. The hollow semicircular arc I / idrophone 6 seals the thin-walled semicircular arc
piezoelectric transducer 7, the semicircular arc plate 8, the side plate 9 and the end plate 10 in
FIG. The air chamber 11 is formed inside by joining, and when the end plates 10 of a pair of no
idrophones 6 are joined, the semicircular plate 8 forms one cylindrical hole 12 through which
the strength member 4 of the array cable penetrates. Also, when the electric wires 16 are
connected in parallel to each other, the pair of hydrophones 6.6 exhibits the same function as
one hydrophone having a cylindrical pressure receiving surface equal to its total pressure
receiving area. Therefore, when the strength member 4 is joined through the cylindrical hole 12
to construct the array cable similar to that of FIG. 1, when the idrophone 6 fails, This is pulled
out of the jacket 5 together with the strength member 4 and only the broken hydrophone is
removed and replaced by replacement (2). The present invention has the above-described
configuration, and when the array cable is configured, the advantages of the conventional hollow
cylindrical .. idrophone, that is, the circular arc outer surface effectively serves as a receiving
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surface, Besides being advantageous in that it can be arranged compactly and the inner diameter
of the jacket does not have to be increased for the wires etc., it has the advantage that it is
convenient to replace a faulty hydrophone etc.
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