JPS63224585A - Ultrasonic wave vibrator - Google Patents
Ultrasonic wave vibratorInfo
- Publication number
- JPS63224585A JPS63224585A JP5932587A JP5932587A JPS63224585A JP S63224585 A JPS63224585 A JP S63224585A JP 5932587 A JP5932587 A JP 5932587A JP 5932587 A JP5932587 A JP 5932587A JP S63224585 A JPS63224585 A JP S63224585A
- Authority
- JP
- Japan
- Prior art keywords
- vibrator
- ultrasonic
- ultrasonic wave
- ultrasonic transducer
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 101150060255 MZB1 gene Proteins 0.000 description 1
- 101100462550 Mus musculus Adcyap1 gene Proteins 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、超音波を使って距離計測、物体有無の検出を
行なう超音波振動子に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ultrasonic transducer that uses ultrasonic waves to measure distance and detect the presence or absence of an object.
従来の技術
近年、超音波を使って距離計測、物体有無の検出をする
傾向が増えてきた。従来、計測距離は長いが、精度が悪
い低周波振動子の場合、超音波振動子の前面にネッＩｆ
張り、超音波振動子面を保護している。一方、計測距離
は短いが、精度が良い高周波振動子の場合、空気に対す
るエネルギー減衰量が太きいため、保護なしで使用して
いる。BACKGROUND OF THE INVENTION In recent years, there has been an increasing trend to use ultrasonic waves to measure distances and detect the presence or absence of objects. Conventionally, in the case of low-frequency transducers with long measurement distances but poor accuracy, there is a net If on the front of the ultrasonic transducer.
tension to protect the ultrasonic transducer surface. On the other hand, high-frequency vibrators, which have a short measurement distance but have good accuracy, are used without protection because their energy attenuation against the air is large.
以下図面を参照しながら、従来の超音波振動子について
説明する。第３図ａは従来の低周波振動子の断面図であ
り、第３図すは従来の低周波振動子の平面図である。１
は送受信の電気信号を送るシールド線である。２はセラ
ミック振動子をカバーし、かつセンサの平行度を保つ役
目をもち、アルミでできた外ケースである。３は凹面円
形状でセラミックでできた振動子で、電気信号を超音波
に、超音波を電気信号に変換する役目をもつ。４は表面
が傷つきやすいセラミック振動子を守り、センサの平行
度を保つ役目をするアルミでできた保護ケースである。A conventional ultrasonic transducer will be described below with reference to the drawings. FIG. 3a is a sectional view of a conventional low frequency vibrator, and FIG. 3 is a plan view of the conventional low frequency vibrator. 1
is a shielded wire that sends and receives electrical signals. 2 is an outer case made of aluminum that covers the ceramic vibrator and maintains the parallelism of the sensor. 3 is a concave circular vibrator made of ceramic, which has the role of converting electrical signals into ultrasonic waves, and converting ultrasonic waves into electrical signals. 4 is a protective case made of aluminum that protects the ceramic resonator whose surface is easily damaged and serves to maintain the parallelism of the sensor.
６は表面が傷つきやすいセラミック振動子を守るために
前面に張ったネットである。6 is a net placed on the front to protect the ceramic vibrator whose surface is easily damaged.
第４図は従来の高周波振動子の断面図である。FIG. 4 is a sectional view of a conventional high frequency vibrator.
１は送受信の電気信号を送るシールド線である。1 is a shielded wire for sending and receiving electrical signals.
２はセラミック振動子をカバーし、かつセンサの平行度
を保つ役目をもち、アルミでできた外ケースである。３
は凹面円形状でセラミックでできた振動子で、電気信号
を超音波に、超音波を電気信号に変換する役目をもつセ
ラミック振動子である。2 is an outer case made of aluminum that covers the ceramic vibrator and maintains the parallelism of the sensor. 3
is a concave circular vibrator made of ceramic, which has the role of converting electrical signals into ultrasonic waves, and converting ultrasonic waves into electrical signals.
６はセラミック振動子３より発する超音波である。6 is an ultrasonic wave emitted from the ceramic vibrator 3.
７は被測定物である。８はセラミック振動子３より発す
る超音波の指向性により超音波が絞られる部分、すなわ
ち焦点である。９は超音波が被測定物７にあたる位置で
ある。7 is an object to be measured. Reference numeral 8 denotes a portion where the ultrasonic waves emitted from the ceramic vibrator 3 are focused by the directivity, that is, a focal point. 9 is a position where the ultrasonic waves hit the object 7 to be measured.
以上のように構成された超音波振動子について、以下そ
の動作について説明する。The operation of the ultrasonic transducer configured as described above will be described below.
セラミック振動子３に電圧を加えて超音波６を発生させ
て、被測定物７に放射する。そして被測定物７から反射
してきた超音波６″ｆ、セラミック振動子３で受けて、
超音波６を電圧に変換する。A voltage is applied to the ceramic vibrator 3 to generate ultrasonic waves 6, which are emitted to the object to be measured 7. Then, the ultrasonic wave 6″f reflected from the object to be measured 7 is received by the ceramic vibrator 3,
Converts the ultrasonic waves 6 into voltage.
発明が解決しようとする問題点
しかしながら上記のような構成では、第３図の超音波振
動子では、超音波振動子面の保護をしているが、超音波
６の方向、焦点８及び超音波ｅが被測定物７にあたる位
置９がわかシにぐいという欠点を有していた。また、第
４図の超音波振動子は保護なしで使用しているため、超
音波振動子面の保護がなされておらず、しかも超音波６
の方向、焦点８及び超音波６が被測定物７にあたる位置
９がわがシにくいという欠点を有していた。すなわち、
超音波６の焦点８の径がかなり小さいために、超音波６
が被測定物子にあたる位置９がわかりにくかった。Problems to be Solved by the Invention However, with the above configuration, the ultrasonic transducer shown in FIG. It had the disadvantage that the position 9 where e corresponds to the object to be measured 7 was too weak. In addition, since the ultrasonic transducer shown in Figure 4 is used without protection, the ultrasonic transducer surface is not protected, and the ultrasonic wave
, the focal point 8 and the position 9 where the ultrasonic wave 6 hits the object 7 are difficult to adjust. That is,
Because the diameter of the focal point 8 of the ultrasonic wave 6 is quite small, the ultrasonic wave 6
It was difficult to understand the position 9, where the object corresponds to the object to be measured.
そこで、本発明は上記欠点に鑑み、超音波振動子面の保
護かつ超音波の方向、焦点及び超音波が被測定物にあた
る位置が得やすい超音波振動子を提供するものである。In view of the above drawbacks, the present invention provides an ultrasonic transducer in which the surface of the ultrasonic transducer is protected and the direction, focus, and position of the ultrasonic wave hitting the object to be measured can be easily determined.
問題点を解決するための手段
本発明の超音波振動子は、超音波振動子の開口部に、先
端に貫通孔のある円錐状のキャップを設けたものである
。Means for Solving the Problems The ultrasonic transducer of the present invention is provided with a conical cap having a through hole at the tip over the opening of the ultrasonic transducer.
作用
この構成によって、保護部は先を切り取り貫通穴のある
円錐形状により超音波振動子から発生する超音波の方向
、焦点及び超音波が被測定物にあたる位置を示すことか
ら、容易に被測定物と超音波振動子の位置関係がわかり
、かつ超音波振動子面を保護する役目をもっている。Function: With this configuration, the protective part has a conical shape with a cut-off tip and a through hole, which indicates the direction and focus of the ultrasonic waves generated from the ultrasonic transducer and the position where the ultrasonic waves hit the object to be measured, making it easy to locate the object to be measured. This allows the positional relationship between the ultrasonic transducer and the ultrasonic transducer to be known, and also serves to protect the ultrasonic transducer surface.
実施例
以下本発明の一実施例として、超音波センシング・シス
テムに用いた場合について、図面を参照しながら説明す
る。EXAMPLE Hereinafter, as an example of the present invention, a case where the present invention is used in an ultrasonic sensing system will be described with reference to the drawings.
第１図、第２図は本発明の実施例における超音波振動子
の断面図である。１１は送受信の電気信号を送るシール
ド線である。１２はセラミック振動子をカバーし、かつ
センサの平行度を保ち、アルミでできた外ケースである
。１３は凹面円形状でセラミックでできた振動子で、電
気信号を超音波に、超音波を電気信号に変換するセラミ
ック振動子である。１４は先を切り取り貫通穴のある円
錐形状の樹脂等でできたキャップである。1 and 2 are cross-sectional views of an ultrasonic transducer in an embodiment of the present invention. Reference numeral 11 denotes a shielded wire for sending and receiving electric signals. 12 is an outer case made of aluminum that covers the ceramic vibrator and maintains the parallelism of the sensor. Reference numeral 13 denotes a vibrator made of ceramic and having a concave circular shape, and is a ceramic vibrator that converts electric signals into ultrasonic waves, and converts ultrasonic waves into electric signals. 14 is a conical cap made of resin or the like with a cut-off tip and a through hole.
以上のように構成された超音波振動子について、以下そ
の動作を説明する。The operation of the ultrasonic transducer configured as described above will be described below.
まず、セラミック振動子１３に電圧を加えて、超音波１
６を発生させ、被測定物１６に放射する。First, a voltage is applied to the ceramic vibrator 13, and the ultrasonic wave 1
6 is generated and radiated to the object to be measured 16.
そのとき、図のごとく先を切り取り貫通穴のある円錐形
状により超音波１５の方向、焦点１７及び超音波１５が
被測定物１６にあたる位置１８がわかり、かつ超音波振
動子面の保護をしている。また、被測定物から反射して
きた超音波１６をセラミック振動子１３で受けて電圧に
変換する。At this time, the direction of the ultrasonic wave 15, the focal point 17, and the position 18 where the ultrasonic wave 15 hits the object to be measured 16 can be determined by cutting off the tip and having a conical shape with a through hole as shown in the figure, and also protecting the ultrasonic transducer surface. There is. Further, the ultrasonic waves 16 reflected from the object to be measured are received by the ceramic vibrator 13 and converted into voltage.
以上のように本実施例によれば、セツティング時及びテ
スト時、超音波の方向、焦点及び超音波が被測定物にあ
たる位置が容易にわかり、かつ超音波振動子面を保護す
ることができる。また、低周波の場合、超音波の収束径
が大きいため、保護部を着脱可能にしても良いことは言
うまでもない。As described above, according to this embodiment, during setting and testing, the direction and focus of the ultrasonic waves and the position where the ultrasonic waves hit the object to be measured can be easily determined, and the ultrasonic transducer surface can be protected. . Furthermore, in the case of low frequencies, since the convergence diameter of ultrasonic waves is large, it goes without saying that the protection part may be made detachable.
発明の効果
以上のように本発明は、超音波振動子より発生する超音
波の方向、焦点及び超音波が被測定物にあたる位置を示
す、先を切り取シ貫通穴のある円錐形状の樹脂等ででき
た保護キャップを設けることにより、超音波の方向、焦
点及び超音波が被測定物にあたる位置が容易にわかり、
かつ超音波振動子面を保護することができ、その実用的
効果は大なるものがある。Effects of the Invention As described above, the present invention uses a conical resin or the like with a cut-off tip and a through hole that indicates the direction and focus of the ultrasonic waves generated by the ultrasonic transducer and the position where the ultrasonic waves hit the object to be measured. By installing the protective cap, you can easily see the direction and focus of the ultrasonic waves and the position where the ultrasonic waves hit the object to be measured.
Moreover, the ultrasonic transducer surface can be protected, which has great practical effects.
第１図、第２図は本発明の一実施例の超音波振動子の断
面図、第３図ａ、ｂは従来の低周波用超音波振動子の断
面図、平面図、第４図は従来の高周波用超音波振動子の
断面図である。
１ｏ・・・・・パキャップ、１１・・・・・・シールド
線、１２・・・・・・外ケース、１３・・・・・・セラ
ミック振動子。Figures 1 and 2 are cross-sectional views of an ultrasonic transducer according to an embodiment of the present invention, Figures 3a and b are cross-sectional views and plan views of conventional low-frequency ultrasonic vibrators, and Figure 4 is a cross-sectional view of a conventional ultrasonic vibrator for low frequencies. FIG. 2 is a cross-sectional view of a conventional high-frequency ultrasonic transducer. 1o...Pacap, 11...Shield wire, 12...Outer case, 13...Ceramic resonator.
Claims (2)
で、前記超音波振動子の開口部に先端に貫通孔のある円
錐状のキャップを設けたことを特徴とする超音波振動子
。(1) An ultrasonic transducer comprised of a ceramic transducer, characterized in that the opening of the ultrasonic transducer is provided with a conical cap having a through hole at its tip.
請求の範囲第１項記載の超音波振動子。(2) The ultrasonic transducer according to claim 1, wherein the cap is detachable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5932587A JPH084358B2 (en) | 1987-03-13 | 1987-03-13 | Ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5932587A JPH084358B2 (en) | 1987-03-13 | 1987-03-13 | Ultrasonic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224585A true JPS63224585A (en) | 1988-09-19 |
| JPH084358B2 JPH084358B2 (en) | 1996-01-17 |
Family
ID=13110088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5932587A Expired - Fee Related JPH084358B2 (en) | 1987-03-13 | 1987-03-13 | Ultrasonic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084358B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012112851A (en) * | 2010-11-26 | 2012-06-14 | Toyota Central R&D Labs Inc | Ultrasonic inspection device and ultrasonic inspection method |
-
1987
- 1987-03-13 JP JP5932587A patent/JPH084358B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012112851A (en) * | 2010-11-26 | 2012-06-14 | Toyota Central R&D Labs Inc | Ultrasonic inspection device and ultrasonic inspection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084358B2 (en) | 1996-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |