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DESCRIPTION JPS61263399

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DESCRIPTION JPS61263399
[0001]
FIELD OF THE INVENTION The present invention relates to an attachment for an ultrasonic
transducer. [Prior Art] Various measuring instruments such as a flaw detector, an echo sounder, a
thickness measuring instrument, a liquid surface needle and the like using ultrasonic transducers
such as electrostrictive elements and magnetostrictive elements are widely used today. In these
measuring instruments, in order to attach an ultrasonic transmitter-receiver incorporating the
above-mentioned ultrasonic transducer to a subject, the ultrasonic transducer should be attached
by an adhesive or the like for the purpose of permanent attachment. It may be fixed directly to
the subject, but when it is moved to various positions and used, a specially designed mounting
device has been used. [Problems to be Solved by the Invention] However, the conventional
mounting device has a problem that the structure is not complicated and the mounting operation
is also troublesome. The present invention has been made to solve the above-mentioned
problems, and the object of the present invention is to provide a simple structure, which is easy
to attach and detach, and to transmit and receive ultrasonic waves to a subject reliably and
efficiently. It is an object of the present invention to provide an ultrasonic transmitter-receiver
attachment that can be made. [Means for Solving the Problems] In order to achieve the above
object, according to the attachment for an ultrasonic transducer according to the present
invention, one magnetic pole surface of a permanent magnet is non-magnetic on the vibrating
surface of an ultrasonic transducer. It adheres through the body or not, and is coated with a
synthetic resin on the entire surface except for the other magnetic pole surface. As the ultrasonic
transducer, a known transducer such as an electrostrictive element or a magnetostrictive element
is used. Furthermore, it is recommended that the above-mentioned coating be completely made
waterproof when it is intended to be used in a liquid. [Operation] If the subject is a magnetic
body with the above-mentioned configuration, the ultrasonic transducer is easily attached to the
subject by adsorbing the permanent magnet to the subject, and removal is also possible. Since
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the vibration surface of the ultrasonic transducer is integrally fixed to the permanent magnet by
an adhesive, it is possible to efficiently transmit and receive ultrasonic waves. [Embodiments] The
configuration of the present invention will be specifically described below with reference to the
embodiments shown in the drawings. FIG. 1 is an enlarged sectional view showing an
embodiment of an attachment for an ultrasonic transducer according to the present invention,
and FIG. 2 is an enlarged sectional view showing another embodiment. Thus, in FIG. 1, 1 is an
ultrasonic transducer consisting of an electrostrictive material 1a and electrode plates 1b and 1c,
2 is a permanent magnet bonded to one surface of the electrode plate 1c, and 3 is the permanent
magnet. The synthetic resin materials 4b and 4c are coated on the entire outer peripheral surface
of the ultrasonic transducer 1 and the permanent magnet 2 except for the magnetic pole surface
2a opposite to the magnetic pole surface bonded to the electrode plate 1c. The input / output
terminals 5 are connected to the electrode plates 1b and 1c, respectively. Reference numeral 5
denotes an object made of a magnetic material.
A well-known electrostrictive material such as quartz crystal, barium titanate, lead zirconate
titanate is used as the electrostrictive material 1a of the ultrasonic transducer 1, and in the
illustrated embodiment, the electrode plates 1a, lb are provided on both sides thereof. The
structure is such that ultrasonic vibration is generated in the vertical direction in the figure by
applying a high frequency voltage through the terminals 4b and 4c. Conversely, when ultrasonic
vibration is applied to the vibrator 1, a high frequency voltage according to the frequency of the
ultrasonic wave is output through the terminals 4b and 4C. Epoxy resin or other appropriate
resin is used as the synthetic resin material 3, and the magnetic poles of permanent magnets are
used to prevent the liquid from entering the portion of the ultrasonic transducer 1 even when the
attachment for the ultrasonic transducer is used in the liquid. The entire outer peripheral surface
of the ultrasonic transducer 1 and the permanent magnet 2 is watertightly coated leaving the
surface 2a. When the permanent magnet 2 is a conductor, the electrode plate IC and the magnet
2 may be insulated by an insulator. When the attachment for the ultrasonic transducer is used,
the pole face 2a of the permanent magnet is attracted to the subject 5, and when used as a
transmitter, high frequency voltage is applied to the terminals 4b and 4c. Apply. In that case, the
vibration of the electrostrictive material 1a is efficiently transmitted to the subject 5 through the
permanent magnet 2 integrally bonded to the electrode plate 1c. Further, when used as a
receiver, ultrasonic vibration from the subject 5 is transmitted to the ultrasonic transducer 1 via
the permanent magnet 2 in close contact with the subject 5 and an output voltage between the
terminals 4b and 40 is obtained. Is obtained. FIG. 2 shows the use of a magnetostrictive element
as an ultrasonic transducer. In FIG. 2, 6 is a π-type ultrasonic transducer composed of a
magnetostrictive material 6a, a coil 6b and a permanent magnet for bias 6c, and 7 is a spacer
composed of a nonmagnetic material bonded to the lower end of the leg of the ultrasonic
transducer. The member 8, 8 is a permanent magnet fixed in the spacer member, 9 is the
ultrasonic vibration except the pole surface 8a on the opposite side to the pole surface of the
permanent magnet bonded to the ultrasonic transducer 6 A synthetic resin material that covers
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the entire outer peripheral surface of the element 6 and the spacer member 7 is a subject made
of a magnetic material. A known electrostrictive material such as nickel, Fe-Ni alloy, AF gold alloy
5nFeSTbFe2 or the like is used as the magnetostrictive material 6a of the ultrasonic transducer 6,
and ultrasonic vibration is generated in the vertical direction in the figure by passing a high
frequency current through the coil 6b. The structure is to generate Conversely, when ultrasonic
vibration is applied to the magnetostrictive material 6a, a high frequency current is output
through the coil 6b.
When the attachment for the ultrasonic transducer is used, the pole face 8a of the permanent
magnet is adsorbed to the subject 10, and when it is used as a transmitter, a high frequency
current is passed through the coil 6b. In such a case, the magnetostrictive material 6a generates
ultrasonic vibration, and the vibration is efficiently transmitted to the subject 10 through the
permanent magnet 8 integrally bonded to the lower end of the magnetostrictive material. When
used as a receiver, ultrasonic vibration from the subject 10 is transmitted to the ultrasonic
transducer 6 via the permanent magnet 8 in close contact with the subject 10, and an output
current is obtained in the coil 6b. Since the present invention is configured as a trapezoid,
according to the present invention, the installation and removal work is easy with a simple
structure, and moreover, the transmission and reception of ultrasonic waves to and from the
subject can be performed reliably and efficiently. An ultrasonic transmitter-receiver attachment is
provided. The configuration of the present invention is not limited to the above embodiment
(including all the modified embodiments that can be easily conceived by those skilled in the art
from the above description within the scope of the object of the present invention. It is a thing.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an enlarged sectional view showing an embodiment of an attachment for an ultrasonic
transducer according to the present invention, and FIG. 2 is an enlarged sectional view showing
another embodiment.
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