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JPS5264558

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS5264558
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing the
structure of the ultrasonic wave transceiver according to the present invention, FIG. 2 is an
explanatory view showing the shape of a transducer, and FIG. FIG. 1, 2 и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и 4 и и и lead wire, 9 и и и и и и и и и и и и и и и и и и и pressure-resistant liquid. ? 149-149-52 52-64 558
(2 ') brother P figure 1 along 1
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic
wave transmitting / receiving apparatus for measuring the velocity of ground to water or an
object by utilizing the Doppler effect of underwater ultrasonic waves, and for reducing the size to
a ship etc. Can be made easy in a narrow space and excellent in water tightness and strength.
Conventionally, although a rectangular one is used as a vibrator, the housing that accommodates
this vibrator is circular, so effective utilization of space can be achieved.-With an I-Mim ?, a
compact ultrasonic transducer Could not be realized. The present invention relates to an
ultrasonic wave transmitting / receiving apparatus in consideration of the above situation, in
which circular divided type vibrators are appropriately inclined and arranged on a plurality of
sound wave transmission materials at required intervals, and these vibrators It is characterized in
that it is fixed to a sound wave transmission material by a coating material, the sound wave
transmission material is accommodated and fixed in a wedge-shaped recess of a circular housing,
and a pressure liquid is filled in a gap. An embodiment of the present invention will be described
based on the drawings. Attach a back surface material + 41151 with closed cells such as cork
and balsa material to a semi-circular transducer + 11121 as shown in Fig. 2 and bond these
together with the coating material + 61 + 71 to the sound wave transmission material 13) at the
required angle Connect one end of the cable 0? drawn out from the wire penetration metal ilG
attached to the cast or resin circular housing (9) with the lead wire (8) drawn out from the
vibration) 2) by adhesive bonding i + 3 and circular Sound wave transmitting material 13), which
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has been made as shown in the figure, in the bowl-like recess of the housing (9). Insert and bond
the flange surface and fix the clamp by clamp bolt I and clamp ring I. Furthermore, fill the plug
with pressure liquid ae with incompressible fluid such as oil from the inlet of plug ? $ and plug
it, and then ship bottom Store in the case attached to In the figure, ? n is a 0 ring groove into
which a 0 ring is inserted in order to maintain water tightness. As mentioned above, since it is
using a circular housing (9), it is reasonably possible to be exposed to a water pressure of 2 to 3
(kp7txf) (a part of the bottom of the circular bottom has been designed to minimize stress
concentration). It can be installed smoothly and is excellent in both strength and watertightness.
Since the area is increased by making the transducer il + 12 + into a semicircular surface, the
directivity of the underwater ultrasonic wave can be improved, and the space in the circular
housing (9) can be effectively utilized, and hence the miniaturization can be achieved. The
bottom 1 hole can be made smaller. Next, the inclination angle and the distance of the vibrator
(old 2) will be described with reference to FIG. In the case of driving the distance between the
transmission and reception wavefronts of the bird's-eye view imaging angle old 2) in the same
phase, when (?) both perturbations + I) t 2 + are driven in phase, m tA = n? (n: integer, ?: in
the sound wave transmission material) Wavelength) (b1 both transducers + 11121 are driven by
.pi. Different phases), A- (n.
?) Let ? be respectively ?, and both vibrators tll 121 form an angle 0 with the horizontal. Now,
assuming that the transmission frequency is ft, the reception frequency is via, and the velocity of
the ship is V (the same direction as the beam direction), Acopec ? v ? ? (fr?it). There is a
relational expression represented by 2 (u + /). Acosec? In this formula (I), 2 (n + /) has the
property of a constant, but if the alignment of the vibrator + 11121 is bad, the electrical phase
will be out of phase even if h and ? are constant, and each unit Different values. However, since
the vibrator 111) is a semicircular surface type, the resonance frequency of the thickness
vibration can be easily aligned. As shown in FIG. 3, a group of transducers obtained by arranging
the transducers +1 + 121 provided in the direction of the angle ? at a distance satisfying the
equation (1): 1:. By connecting 8 * 1'A * in parallel, if it is used for transmission and reception of
the de Brunner, it is possible to construct a transmission / reception device which does not
depend on the change in the speed of water in water. This is the principle of automatic sound
velocity correction. Furthermore, as shown in FIG. 3, two vibrators may be provided in one
direction, but a plurality of vibrators may be arranged so that three or more vibrators form one
group. It is also good. The present invention is not limited to the embodiment shown and
described. For example, the vibrator is not a semicircular but a circular divided type such as a
quarter, and the sound wave transmitting material can withstand high pressure and the pressure
is high. Bonding the sound absorbing and absorbing material and pillars to the inner bottom
surface of the circular housing and the center top surface of the sound transmission material to
prevent denting, reflection absorption of the sound to ensure the angle of the sound wave
transmitting and receiving wave more accurately The back of the material is provided with a
guide with an accurate angle based on a circular housing, and the sound wave reflection and
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absorption material is applied to the inner surface of the circular housing (t) , Ft. In order to
prevent the propagation of sound, the reflective material of the sound wave is used as the
transducer and the back material so that the transducer does not lose noise from its side face and
that there is no exfoliation on the bonding surface with the sound transmission material. The
arrangement and covering on the V plane of the above is optional, and it goes without saying that
various modifications can be made without departing from the scope of the other inventions. As
described above, according to the transmitting and receiving apparatus of the present invention,
downsizing can be achieved and effective use of space can be achieved, and it is possible to carry
out sacrificial installation more easily than before, and also excellent in strength and water
tightness. It has the excellent effects of being able to be corrected, having no air stagnation,
resisting high pressure in water, making it difficult to form a stuck oscillator, and making it
possible to narrow the receiving Doppler shift spectrum width.
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