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DESCRIPTION JPS5735677

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DESCRIPTION JPS5735677
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows the structure of the present invention. FIG.
2 shows the compression of the receiving beam according to the present invention. 1 to 9 иииииииии
Array of transducers arranged in an arc, 11 to 19 иииииииии Amplifier for received voltage, 21.22 иииииии
Array of transducers, 30 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии The output of the sub-amplifier, 60..., Product circuit, 61
.. .., combined receive beam output, 70 ........ center of arrival direction of sound wave, 71. Receive
beam by the output 53 of the main amplifier, 72. Wave beam, 75 и и и и и и и и и и и Compressed
receive beam. ???????? ???
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tanning
apparatus for transmitting and receiving sound waves using an array of arc-shaped transformers
/ user. In FIG. 1, the receiving voltage induced in the arc / arranged transformer / ether array 1
to 9 is increased by amplifiers 11 to 19 connected to the respective transformers, and the
scanning circuit group 30 is Leading, the scanning circuit group 30 includes the scanning
circuits 31 to 36 and rotates in the direction indicated by 37 to run the outputs of the amplifiers
11 to 19). Switch the connections of the scan circuits 31 to 36 in sequence, ie the next scan of
the situation shown is amplified: (t13 is disconnected, instead the amplifier rmi 114 is connected
to the scan circuit 31 and the output of the amplifier 19 is scanned It is connected to the circuit
36. Such an operation is generally performed by static switching by the power circuit and is
called scanning. The arc-shaped transformer / feed trains 1 to 9 may amplify the transformer /
feed trains 21 and 22 in order to widen the scanning range of the received beam, and it is
necessary to scan all directions. It is necessary to arrange the transformer / food train in an arc
shape and in an annular shape. . The received voltage passed through the scanning circuit group
30 is amplified by the main amplifiers 41 to 43 and the sub amplifier 45 and supplied to the
product [o] path 60 through the main delay circuit 51 and the sub delay circuit 52, respectively.
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1
The distance between the transducer arrays 1 to 9 arranged in an arc shape is set shorter than
the wavelength of the received sound wave. In the above configuration, the transducer arrays 1
to 9 arranged in an arc shape have extremely uniform receiving characteristics (2) 7 ')). , A6-It is
needless to say that the amplifiers 11-19 scan the main delay circuit 51 which compensates the t
uniformity of the characteristics of the transformer arrays 1-9 arranged in an arc shape as
necessary. By adjusting the phase and amplitude of the received voltage that has passed through
the circuit group 30, the transducer group connected to the scanning circuit group 30 among the
transformer groups 1 to 9 arranged in an arc shape is shown in FIG. Bridges ri3-8) with respect
to the direction of arrival of sound waves as if they were arranged in a plane as if they were
arranged in a plane-sound waves came from the front of transformer 7 user groups 3-8
connected to scanning circuit group 30 In that case, the sound wave first arrives at 5 and 6 of
the transformer group, then at 4 and 7 and finally at 3 and 8 1, so the main amplifier passed the
main delay circuit 51 At the output 53 of the 8 as reception voltage of fart begin to induce
becomes equal amplitude 2 equal phase to the amplifier 13-18.
If the main amplifiers 41 to 43 are adjusted, receive beams similar to those when the transformer
groups 3 to 8 are arranged in a plane are formed. Then, the receiving voltage of the scanning
circuits 31 and 36 that leads to the rotation of the receiving beam as the scanning direction
rotates as indicated by the arrow (3) ') is also led to the sub amplifier 45. Then, it is added to the
sub delay circuit 52 and becomes the output 54 of the sub amplifier, which is combined with the
output 53 of the main amplifier in the product circuit 60. FIG. 2 shows the relative values of the
horizontal axis (the arrival direction of the sound wave, the vertical axis the output 53 of the
main amplifier, the output 54 of the sub amplifier, and the receiving beam output 61 obtained by
combining the two river forces with the product circuit 60). FIG. The center 70 of the direction of
arrival of the sound wave indicates the direction of the center of the transducer rows 1 to 8
connected to the scanning circuit group 30, that is, the direction of the centers of the transducer
rows 5 and 60 in FIG. The receiving beam 71 by the output 53 of the main amplifier and the
receiving beam 72 by the output 54 of the sub-amplifier are the receiving electrons
corresponding to the respective receiving beams before combining the two receiving beams in
the product circuit 60 Indicates The received beam 72 by the output 54 of the sub amplifier is
formed by 3 and 8 of the 3 to 4 transducers so that the connection condition of the scanning
circuits 31 to 36 is 4). And 8 are spaced apart from each other as shown in the figure, so they are
spaced several times the wavelength of the received sound wave. Accordingly, the beam 72
received by the output 54 of the sub-amplifier has the center 70 of the sound wave incoming
direction and the received beams 73 and 74 in the direction away from that direction. A
characteristic is that the receiving voltage 71 is maximized at the center 70 of the direction of
arrival of the sound wave, and the receiving voltage 71 decreases as the direction deviates from
the arrival direction O center -70 of the sound wave. A product circuit 60 having a characteristic
that the output 53 of the main amplifier and the output 54 of the sub-amplifier corresponding to
these two types of received beams 71 and 72 are obtained by an output corresponding to the
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product of the two outputs. The combined received beam output 61 is relatively increased
around the center 70 of the direction of arrival of the sound wave due to the characteristic of the
product circuit 60. In the direction of the output 53 of the main amplifier or in the weak
direction, the combined received beam output 61 is relatively reduced, so that the combined
received beam output 61 is compressed (5) into the received beam 75. In the above explanation,
the number of combinations of transducer lines is limited as shown in FIG. 1, but in order to
obtain a sharp receiving wave Vino, a larger number of tiger / sungysa lines are required, and
such an example Well, it should not be said that the number of pairs of main amplifiers and subamplifiers need to be larger.
Since the present invention has the configuration described above, there are practical effects
such as the ability to obtain sharp beam receiving characteristics with a relatively small
transformer / feed train.
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