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Patent Office Secretary Hideo Saito 1, Name of Invention! ^ V ク ノ ノ ノ ノ 番地 416 416 番地
番地 番地 番地 東 東 蒲 蒲 蒲 丁 丁 丁 丁 住所 住所 住所 住所 Tokyo District 2 Minato Ward
Shibishi Kubo 2 第 No. 17 Mori Building 〒 105 T story 03 (502) 3181 (Care) 0--■ Japan Patent
Office 0 JP-A-5 1-1285 840 Japanese patent publication 51. (1976) u, 9 ■ h h 一一 3 1 1 名称 1
1 、 名称 1976 ultrasonic probe
2, inventor
8. Detailed Description of the Invention The present invention relates to an ultrasonic probe C
comprising ultrasonic transducers for transmission and reception. The ultrasonic probe is used to
name and send ultrasonic waves in nondestructive inspection of various materials and structures,
etc., C: similar tests, measurements, etc., and dedicated transducers for transmission and
communication. And one that is integrally formed is usually referred to as a split ultrasound
probe. In the conventional split-type probe C :, as illustrated in FIG. 1 C; the transmitting
transducer 1 and the receiving transducer 2 are each one end 3 一端 and 4 of the ultrasonic
delay members 3 and 4 respectively.畠 (= each mounted. The delay members 3 and 4 have the
other ends jb and 4b located on the same plane, and are arranged in parallel via the acoustic
shielding plate 5. The delay member J has a cross-sectional shape that is substantially
symmetrical with respect to the 4If fissuring plate 5, and is C2 inclined so as to be closer to the
other m3b 14b as it gets farther from each end 3 厘, 4ald obscuring plate 5 and The intersection
line between each plane parallel to the one end 311 e 4 ′ ′ and the plane parallel to the other
end J b and 4 b is parallel to the shielding plate 5. When the vibrators 1 and 2, the delay
members 3 and 4 and the shielding plate 5 are housed in the case 6 (= contained, the vibrators 1
and 2 are connected via a conductor 7.8 (in the drawing) C) ((2 and the other end 3b, 4b can be
in contact with the test material 9 (;)). In the conventional divided probe EndPage: 1 JC2
configured as above, the direction of the ultrasonic waves of the transducers 1 and 2 is
substantially perpendicular to the other ends 3 b and 4 b of the delay members 3 and 4. Since
the ultrasonic waves transmitted from the vibrator 1 are reflected by the other end 3 b and the
surface of the test material 9 because they are on the same plane, the energy of the reflection
line directed in the direction of the vibrator 2 is large. The reflected wave that passes through the
shielding plate 5 and travels along the surface of the test material 9 and is emitted from the
delay member 4C and arrives at the oscillator 2C, ie, the energy of so-called leaky waves is also
inevitably I: large. Such a leaky wave may have a short propagation distance, whereby a noise
signal generated in the vibrator 2 causes a large obstacle to the detection of a signal based on a
flaw or the like present in the test material 9, C2 Detection of scratches near the surface and
small scratches etc. (2 extremely harmful. C: The ultrasonic wave reflected at the other end 3b is
also incident on the pregnancy dilator IL 2 and converted into an electrical signal, causing an
interference with the V reception signal due to electromagnetic coupling between the source and
the receiving circuit 1: Noise signal levels tend to be increased. The present invention has been
made as the second layer of the above-mentioned problem C, and it is an object of the present
invention to provide an ultrasonic probe with a low level of the signal level of the conventional
microphone. .
Next, (two drafts will be described with reference to one example of the illustrated example ≦
one. M2b WJi = The vibrator 1 for transmission, the vibrator 2 for reception, the shield plate 6,
the case 6 and the conducting wire 8 may be the same as the conventional one. The
ultrasonic wave delaying member 10.11 is configured to be conventional 6: 6 equivalent 1 to the
conventional one, except for the transducers 1 and 2 or the respective ends 10 'and 111 to be
attached. The delay members 10.11 face the opposing surfaces JOc, JJc and the other ends 10b,
respectively. 11b, each end 10a being a cross-section perpendicular to 11b; Each other end 10 b
as Jlm moves away from the shielding plate 5. (2 and the other end 10b are inclined at an angle
of 0 ° with respect to a plane port parallel to Ilb). In a cross section where the fc shielding plate
5 and the ten strokes are made, each end 10a and i1m are opposite to each other; in the opposite
direction, they are inclined and form the angle θ1 ° θb with the other valley end 10b and Ilb.
Therefore, the line of intersection of the planes parallel to the one end 101 ° 11 m and the
other ends 10 b and 11 b is non-parallel to the opposing surface 10 C 111 C. As described above
(in the present invention probe C 2 N of the present invention, the ultrasonic directivity direction
of the transmission transducer 1 is obtained even if the above-mentioned angle .theta. Is larger
than the angle of the other end 10bl of the delay member 10, that is, the incident angle is larger
than that of the conventional one, the other end 10b and the surface of the subject 9 to be
examined Also less. The reflected wave energy E (represented by a voltage value) measured by
the inventors at a constant value of the angle θa at a constant value of the angle θO and 1 / N
is the angle θ 畠 as shown in Example 3-1. If the size is 1 and the size is θa−1 °, then C; is
conventional (0 m−0) C and the reflected wave energy E is about '9. トなった。 In this process,
the anti-wave energy decreases, and the directions C of ultrasonic waves directed by C 2 and
transducers 1 and 2 mutually C do not cross each other, each projection line on a plane parallel
to the shield plate 6 Since C is twisted so as to cross at angle θ1 (= 08 + θb> w), the noise signal
energy is also significantly reduced as compared with conventional C noise. When the inventors
measure the noise signal level V (represented by voltage value) based on the sound # coupling
and the electromagnetic coupling for each value of θ 1 as a pair, the C 2 deviation is 纂 4 In the
case where the angle θ1 increases as shown (2 shows that the noise signal level 2 decreases,
and the noise signal level 0 decreases, 0.2 to 2 ° (θ1 to θb-1 ′), C2 is the conventional one
(θa−1, θb -,, g)-The ratio was about /.
As described above (in the second case, each end 10a, 11 * of the delay member 10.11 is
opposite to each other in the cross section C2 parallel to the shielding plate 5 with the other end
10b, 11b + 2). However, even if only one of them is inclined (for example, tjb, t), or even if θ0-0
It is clear that even if there are four chopsticks, EndPage: 2 can be played, each with a difference
C in the degree of phlegm, but with the same reduction in the coping voice level as described
above. In the case where only one of them is inclined (the second one is obviously applicable to
the delay member 10 on the transmission side). As described above, according to the present
invention, at least one of the transmitting side and the receiving side delay member is one end on
which the vibrator is mounted and the other side of the same end 6 and the other side 6 The two
opposing non-parallel faces (of two parallel faces) can provide an ultrasonic probe with a noise
signal level significantly lower than that of the conventional one with substantially the same
external dimensions.
4. Brief description of the drawings FIG. 1 is a cross-sectional view illustrating a conventional
probe, FIG. 2 shows an embodiment of the present invention, and the same marks are the crosssectional views along line -A of FIG. Fig. IB is a cross-sectional view taken along the line B-B at the
same mark, Fig. 3 and Fig. 4 are diagrams for explaining the fluctuation of the noise signal level.
1.2 ultrasonic transducer 5 f1 # shielding plate 9 test material 10.11 delay member 10a, 11a one
end 10b, Zlb other end 10C, l1c-· · Face-to-face-Person-agent Attorney-in-charge Suzue Take Line
piece 1 figure juice "Division Fig. 4 EndPage: 35, List of attached documents (4) Request 01 01,
inventor other than the above, patent applicant Or agent (1) Inventor (2 actuarial person's
address Shiba-ku Kubo, Minato-ku, Tokyo, 2nd place, 17th Mori Building, Sakuragawa-cho Name
(6694) Patent attorney Yuki Komiya-. Address same place 2j full name (6881) patent attorneys
Tsuboi Chiyoji (7043) patent attorneys Konosen Masayoshi next Japanese patent application [51128584 (4) EndPage: 4
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