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JPS5671693

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DESCRIPTION JPS5671693
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a prior art example, FIG. 2 shows an
embodiment of the present invention, and FIG. 31 shows a concrete example of a transducer unit.
In FIGS. 2 and 3, 1 is a vibrator holder, 2 is a vibrator unit, 3 is a holding bracket, 4 is a vibrator,
and 5 is a molding material. ,
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an
ultrasonic transducer suitable for use in transmitting and receiving ultrasonic waves in a wide
range of directions, for example. For example, when transmitting and receiving ultrasonic signals
in a wide range direction, as shown in FIG. 1, many ultrasonic transducers T to Tn are arrayed in
the circumferential direction, and it is often used to utilize their combined directional
characteristics Be In this case, when the entire arrayed ultrasonic transducers are molded with a
sound transmission material and integrated, it is possible to easily transmit and receive ultrasonic
waves into water by making it a watertight structure. Become. In the transducer shown in FIG. 1,
it is not possible to obtain uniform directional characteristics in a wide range of directions unless
the characteristics of each transducer T1 to silent have the same characteristics. 7)) Even if the
vibrators are arranged in advance in a substantially uniform manner, when the characteristics of
each vibrator are measured after molding, non-uniformity may occur in the one or two vibrators
due to various causes of "during molding" . In such a case, the entire transducer becomes
defective. This invention copes with the above-mentioned drawbacks, and even if several
vibrators are nonuniform, by exchanging the vibrators, it is possible to use the transmitting and
receiving waves without making the whole transmitter and receiver defective. Provide the This
will be described in the following embodiment of the drawings. In FIG. 2, reference numeral 1
denotes a holder of a vibrator, which is formed in an arc shape. .. Are arrayed and fixed at regular
intervals along the drawing of the holder 1 in the vibrator unit. Each of the transducer units 2.2...
Is fixed by holding metal fittings 3.3... Provided in each unit. FIG. 6 shows a specific example of
the transducer unit 2, and the pair of transducers 4, 4 is molded by the sound wave transmission
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material 5. Reference numeral 3 denotes a holding fitting which protrudes from the inside of the
molding material 5. In the above, a pair of vibrators is molded, but the number of vibrators is
arbitrary, and IEF4 * @ PZIfC $ "E? As in the present invention, a specific unit number of
vibrators are molded to form a unit, and a large number of unitized vibrators are arranged in a
holder to constitute a transmitter-receiver as in the above. It is done. Therefore, when the
characteristics of a particular transducer are uneven, it is sufficient to replace only the
transducer unit, and the entire transducer does not fail. Therefore, a highly productive transducer
can be obtained.
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