JPS6293823U

JPS6293823U -

Info

Publication number: JPS6293823U
Application number: JP18296385U
Authority: JP
Priority date: 1985-11-29
Filing date: 1985-11-29
Publication date: 1987-06-15

Description

[Brief explanation of the drawing]

第１図は本考案の構成例の側面図、第２図は従
来例の側面図、第３図は主信号の伝播経路を示す
側面図、第４図はスプリアス信号の伝播通路を示
す側面図である。１１，２１……超音波遅延媒体、１２，２２，
４２……入力トランスデユーサ、１３，２３，４
３……出力トランスデユーサ、１４，４４……短
辺、１５，４５……切り欠き辺、１６，１７，４
６，４７……長辺、Ａ_１〜Ａ_１５，２４，２５…
…減衰材、Ｓ_１，Ｓ_２……スプリアス信号の伝播
通路。 Fig. 1 is a side view of a configuration example of the present invention, Fig. 2 is a side view of a conventional example, Fig. 3 is a side view showing the main signal propagation path, and Fig. 4 is a side view showing the spurious signal propagation path. It is. 11, 21... Ultrasonic delay medium, 12, 22,
42...Input transducer, 13, 23, 4
3... Output transducer, 14, 44... Short side, 15, 45... Notch side, 16, 17, 4
6, 47... Long side, A ₁ to A ₁₅ , 24, 25...
...Attenuation material, S ₁ , S ₂ ... Spurious signal propagation path.

Claims

[Claims for Utility Model Registration] (1) The shape of the main surface of the ultrasonic delay medium is such that two adjacent corners on the short side of a rectangle have a ratio of the length of the long side to the short side of approximately 5:2. a pentagonal or hexagonal shape cut out at an angle of approximately 45 degrees, an input transducer and an output transducer are attached to one of the cutout surfaces, and an attenuator for attenuating ultrasound waves on at least one of the main surfaces. an ultrasonic delay line provided with an input transducer with attenuating material provided on at least one of the main surfaces of the attenuating material provided on the main surfaces, and with no corners cut out; The position on the main surface relative to the ultrasonic propagation path that reflects off the short side, further reflects off the unattached cutout surface of the input/output transducer, and enters the output transducer, or is emitted from the input transducer. reflected from the long side opposite the input transducer, further reflected from the long side opposite the long side, then reflected from the short side with no corners cut out, and then reflected from the short side opposite the input transducer. At least one of the attenuating materials provided at a position on the main surface corresponding to the ultrasonic propagation path reflected from the long side facing the user and input to the output transducer is arranged at the peripheral edge of the main surface. The damping material provided at a position on the main surface that is separated from the periphery is larger than the other damping material provided on the periphery of the main surface. An ultrasonic delay line characterized by having a higher ultrasonic attenuation rate than other attenuating materials provided at positions on the surface. (2) Ultrasonic waves emanating from the input transducer, reflected from the short side with no cut-out corners, further reflected from the unattached cut-out face of the input/output transducer, and input to the output transducer. a position on the main surface corresponding to the sound wave propagation path, or
emanating from an input transducer, reflected from a long side opposite the input transducer, further reflected from a long side opposite the long side, and then reflected from a short side with uncut corners; Subsequently, at least one of the attenuating materials provided at a position on the main surface corresponding to the ultrasonic propagation path that is reflected by the long side facing the input transducer and input to the output transducer is A damping material provided on the peripheral edge of the surface is more likely to be disposed on the main surface than other damping materials provided on the peripheral edge of the main surface, and a damping material provided at a position on the main surface that is separated from the peripheral edge is stronger than other damping materials provided on the peripheral edge of the main surface. The ultrasonic delay line according to claim 1, wherein the area of the attenuating material is made larger than that of other attenuating material provided at a position on the main surface that is free from the main surface. (3) Ultrasound emitted from the input transducer, reflected from the short side with no cut-out corners, further reflected from the unattached cut-out face of the input/output transducer, and input to the output transducer. a position on the main surface corresponding to the sound wave propagation path, or
emanating from an input transducer, reflected from a long side opposite the input transducer, further reflected from a long side opposite the long side, and then reflected from a short side with uncut corners; Subsequently, at least one of the attenuating materials provided at a position on the main surface corresponding to the ultrasonic propagation path that is reflected by the long side facing the input transducer and input to the output transducer is A damping material provided on the peripheral edge of the surface is more likely to be disposed on the main surface than other damping materials provided on the peripheral edge of the main surface. The ultrasonic delay line according to claim 1, wherein the ultrasonic delay line is made thicker than other sound absorbing material provided at a position on the main surface separated from the main surface.