JPH08105784A - Ultrasonic wave guide for ultrasonic level meter - Google Patents
Ultrasonic wave guide for ultrasonic level meterInfo
- Publication number
- JPH08105784A JPH08105784A JP6241620A JP24162094A JPH08105784A JP H08105784 A JPH08105784 A JP H08105784A JP 6241620 A JP6241620 A JP 6241620A JP 24162094 A JP24162094 A JP 24162094A JP H08105784 A JPH08105784 A JP H08105784A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- tube
- inner diameter
- wave guide
- level meter
- 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
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
(57)【要約】
【目的】本発明は、超音波導波管を継ぎ管構造とし、製
造組立を簡易にすると共に、完成後の保管や運搬上の取
り扱いを容易にする超音波式液面レベル計の超音波導波
管を提供することを目的とする。
【構成】本発明は、超音波素子１を挿入した第１の超音
波導波管２−１と、この第１の超音波導波管２−１の内
径と等しい内径を持つ第２の超音波導波管２−２と、前
記第１の超音波導波管２−１と第２の超音波導波管２−
２の突き当て部位に相当する位置に第１の超音波導波管
２−１の内径よりわずかに内径が小さい超音波反射リン
グ３を組み込み、継ぎ手４で前記第１の超音波導波管２
−１と第２の超音波導波管２−２を接続して超音波導波
管を構成する。
(57) [Summary] [Object] The present invention provides an ultrasonic liquid surface having a joint structure of an ultrasonic waveguide, which simplifies manufacturing and assembly and facilitates storage and transportation after completion. An object is to provide an ultrasonic waveguide of a level meter. According to the present invention, a first ultrasonic waveguide 2-1 having an ultrasonic element 1 inserted therein and a second ultrasonic waveguide 2-1 having an inner diameter equal to the inner diameter of the first ultrasonic waveguide 2-1. Acoustic wave guide 2-2, the first ultrasonic wave guide 2-1 and the second ultrasonic wave guide 2-
The ultrasonic reflecting ring 3 having an inner diameter slightly smaller than the inner diameter of the first ultrasonic wave guide 2-1 is installed at a position corresponding to the abutting portion 2 of the first ultrasonic wave guide 2-1, and the joint 4 is used for the first ultrasonic wave guide 2
-1 and the second ultrasonic waveguide 2-2 are connected to form an ultrasonic waveguide.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、容器等に収容されてい
る液体の液面の位置を超音波の反射波を用いて検出する
超音波式液面レベル計の超音波導波管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic wave guide of an ultrasonic liquid level meter for detecting the position of the liquid level of a liquid contained in a container or the like using reflected waves of ultrasonic waves.
【０００２】[0002]
【従来の技術】超音波式液面レベル計の基本原理は、送
信用超音波素子から超音波を放射し、これが液面に反射
して戻ってくるのを受信用超音波素子で受け、その間の
時間を計測することにより、超音波素子から液面までの
距離を求めるものである。2. Description of the Related Art The basic principle of an ultrasonic liquid level meter is that an ultrasonic wave is emitted from a transmitting ultrasonic element, and the ultrasonic wave is reflected by a receiving ultrasonic element and returned to the receiving ultrasonic element during the period. The distance from the ultrasonic element to the liquid surface is obtained by measuring the time.
【０００３】従来の超音波式液面レベル計は、一般にこ
の基本原理そのままに構成されていたため、温度や気圧
の変化などの測定環境の影響を補正するための手段を別
に設ける必要があった。また、放射された超音波が拡散
するために、大出力の超音波素子を用いる必要があっ
た。Since the conventional ultrasonic type liquid level meter is generally constructed with this basic principle as it is, it is necessary to separately provide a means for correcting the influence of the measurement environment such as a change in temperature or atmospheric pressure. Further, since the emitted ultrasonic waves are diffused, it is necessary to use a high-power ultrasonic element.
【０００４】これらの問題点を解決するために、近年、
送受信用を兼ねた１個の超音波素子を管の一端に挿入
し、該超音波素子から一定の距離を隔てた管内に反射板
を設けると共に、管の他端を液中に浸すことにより、測
定経路を超音波導波管内に閉じ込めるように構成し、該
超音波素子から該反射板までの距離を基準として液面の
距離を比較測定するようにした新しい計測方式の超音波
式液面レベル計（特開平５−５２６３５号）が発明され
た。In order to solve these problems, in recent years,
By inserting one ultrasonic element also serving as a transmitter and receiver into one end of the tube, and providing a reflecting plate in the tube at a certain distance from the ultrasonic element, and immersing the other end of the tube in the liquid, Ultrasonic liquid level of a new measurement method configured so that the measurement path is confined in the ultrasonic waveguide, and the liquid level distance is comparatively measured based on the distance from the ultrasonic element to the reflector. A total (JP-A-5-52635) was invented.
【０００５】図６（ａ）は特開平５−５２６３５号の超
音波式液面レベル計の一例を示す断面図であり、図６
（ｂ）は反射板の斜視図である。送信と受信を共用する
超音波素子１９は超音波素子ホーン２１の内部に挿入さ
れ、さらに超音波素子ホーン２１は管２２の一端に挿入
されており、管２２の他端は、液面２５に浸っている。
超音波素子ホーン２１は送信と受信の効率を高めると共
に、超音波素子１９を管２２の断面の中心に保持する。
また、超音波素子１９から一定距離ｄだけ隔てた管２２
内部の断面の一部に微小な反射板２３が設置されてい
る。反射板２３の形状は、一例として、リング状のもの
が用いられる。また、２４は液面２５のレベルが変化し
たときに管２２内部の空気が出入りするための通気孔で
あり、管２２の一部、あるいは超音波素子ホーン２１の
一部に設けられている。FIG. 6 (a) is a sectional view showing an example of the ultrasonic type liquid level meter disclosed in JP-A-5-52635.
(B) is a perspective view of a reflection plate. The ultrasonic element 19 that shares both transmission and reception is inserted inside the ultrasonic element horn 21, and the ultrasonic element horn 21 is inserted at one end of the tube 22, and the other end of the tube 22 is at the liquid level 25. Soaking
The ultrasonic element horn 21 enhances the efficiency of transmission and reception, and holds the ultrasonic element 19 at the center of the cross section of the tube 22.
In addition, the tube 22 separated from the ultrasonic element 19 by a certain distance d.
A minute reflector 23 is installed on a part of the internal cross section. The shape of the reflection plate 23 is, for example, a ring shape. Further, reference numeral 24 is a ventilation hole for allowing air inside the tube 22 to flow in and out when the level of the liquid surface 25 changes, and is provided in a part of the tube 22 or a part of the ultrasonic element horn 21.
【０００６】いま、超音波素子１９から放射された超音
波が反射板２３で反射されて戻ってくるまでの時間をＴ
1 、超音波素子１９から放射された超音波が液面２５で
反射されて戻ってくるまでの時間をＴ2 、超音波素子１
９から液面２５までの距離をＸ、音速をＣとすると、２
ｄ＝ＣＴ1 、２ｘ＝ＣＴ2 の関係があるから、液面２５
までの距離Ｘは、 Ｘ＝ｄ×（Ｔ2 ／Ｔ1 ） 上式において、ｄは既知であるから、Ｔ1 とＴ2 との比
（Ｔ2 ／Ｔ1 ）を計測することにより、Ｘが求まる。同
式には音速Ｃが含まれないから、温度、気圧などの変動
により、音速Ｃが変化しても計測の精度には影響しな
い。Now, the time until the ultrasonic wave radiated from the ultrasonic element 19 is reflected by the reflecting plate 23 and returns is T
1 , the time until the ultrasonic wave radiated from the ultrasonic element 19 is reflected by the liquid surface 25 and returns, T 2 , the ultrasonic element 1
If the distance from 9 to the liquid surface 25 is X and the speed of sound is C, then 2
Since there is a relationship of d = CT 1 and 2x = CT 2 , the liquid level 25
The distance X to is: X = d × (T 2 / T 1 ) In the above equation, since d is known, X is obtained by measuring the ratio (T 2 / T 1 ) of T 1 and T 2. Is required. Since the sound velocity C is not included in the equation, even if the sound velocity C changes due to changes in temperature, atmospheric pressure, etc., the measurement accuracy is not affected.
【０００７】一方、超音波素子１９を管２２の内部に挿
入し、超音波を液面２５まで管２２内に封じ込めた状態
で送信する構成のため、超音波の拡散が少なく、効率よ
く反射波を受けることができる。この結果、小形の超音
波素子で十分な測定範囲を確保できる。また、送信、受
信を１個の超音波素子１９で共用するため、取り付け面
積を小さくできる。On the other hand, since the ultrasonic element 19 is inserted inside the tube 22 and the ultrasonic wave is transmitted while being confined in the tube 22 up to the liquid surface 25, the ultrasonic wave is less diffused and the reflected wave is efficiently reflected. Can be received. As a result, it is possible to secure a sufficient measurement range with a small ultrasonic element. Moreover, since the transmission and reception are shared by one ultrasonic element 19, the mounting area can be reduced.
【０００８】[0008]
【発明が解決しようとする課題】特開平５−５２６３５
号には、反射板としてリング状の例が図示されている
が、それらの具体的な形状や取付構造例は示されていな
い。[Patent Document 1] Japanese Patent Application Laid-Open No. 5-52635
Although a ring-shaped example is shown as a reflection plate in the publication, their specific shapes and examples of mounting structures are not shown.
【０００９】実現可能性のある取付構造の例としては図
５（ａ）〜図５（ｄ）が想到される。As an example of a feasible mounting structure, FIGS. 5 (a) to 5 (d) are conceived.
【００１０】例えば、超音波導波管２の管壁の所定位置
に直径を指し渡して小孔を開け、図５（ａ）のように該
小孔に超音波反射細線３１を貫通させて固定する。また
は、図５（ｂ）のように超音波導波管２内に挿入した超
音波反射細線リング３２の端末３２−１，中間突起３２
−２を該小孔に突き出し引っかけて固定する。別の構造
としては、図５（ｃ）のように超音波導波管２の管壁の
所定位置に小孔を複数個開け、管内に挿入した超音波反
射リング３を管外からピンまたは小ねじ５で固定する。
あるいは、図５（ｄ）のように超音波導波管２に開けた
該小孔から接着剤６を注入して超音波反射リング３を固
定する。For example, a small hole is opened at a predetermined position on the tube wall of the ultrasonic wave guide 2 and a small ultrasonic wave reflection wire 31 is passed through the small hole and fixed as shown in FIG. 5 (a). To do. Alternatively, as shown in FIG. 5B, the terminal 32-1 and the intermediate protrusion 32 of the ultrasonic reflection thin wire ring 32 inserted in the ultrasonic waveguide 2.
-2 is projected and hooked in the small hole and fixed. As another structure, as shown in FIG. 5C, a plurality of small holes are made at predetermined positions on the tube wall of the ultrasonic waveguide 2, and the ultrasonic reflection ring 3 inserted in the tube is pinned or small from the outside of the tube. Secure with screws 5.
Alternatively, as shown in FIG. 5D, the adhesive 6 is injected from the small hole formed in the ultrasonic waveguide 2 to fix the ultrasonic reflection ring 3.
【００１１】しかしながら、上記のいずれの想到例も長
い管の中間位置の内部に微少な反射板を設定すること
は、実構造として専用工具を使用しても、なお作業に困
難を伴う。このほか、完成した液面レベル計は長尺であ
るが故に、精密測定器としての保管や運搬上の取り扱い
が面倒である、という欠点があった。However, in any of the above-mentioned examples, setting a minute reflecting plate inside the middle position of a long tube is still difficult to work even if a dedicated tool is used as an actual structure. In addition, since the completed liquid level gauge is long, it has a drawback that it is troublesome to store and transport as a precision measuring instrument.
【００１２】本発明は上記事情に鑑みてなされたもの
で、超音波導波管を継ぎ管構造とし、製造組立を簡易に
すると共に、完成後の保管や運搬上の取り扱いを容易に
する超音波式液面レベル計の超音波導波管を提供するこ
とを目的とする。The present invention has been made in view of the above circumstances. The ultrasonic waveguide has a joint pipe structure, which simplifies manufacturing and assembling, and facilitates storage and transportation after completion. An object of the present invention is to provide an ultrasonic waveguide of a liquid level meter.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に本発明の超音波式液面レベル計の超音波導波管は、超
音波素子を管の内部の一端に挿入し、該超音波素子から
一定の距離を隔てた管内部の断面の一部に微小な反射板
を設け、管の他端を液中に浸すように構成すると共に、
該管を導波管として超音波を液面に放射し、該反射板で
反射された超音波の受信時間と、液面で反射された超音
波の受信時間とを計測し、それらの受信時間の比を求め
ることにより、液面までの距離を検出する超音波式液面
レベル計において、反射板を設けるべき位置で管を切断
し、該切断部に反射板が配置され、継ぎ手で前記管が接
続されていることを特徴とするものである。In order to achieve the above object, an ultrasonic wave guide of an ultrasonic liquid level meter according to the present invention has an ultrasonic element inserted into one end of the inside of the ultrasonic wave. A minute reflector is provided on a part of the cross section inside the tube at a certain distance from the element, and the other end of the tube is soaked in the liquid.
The ultrasonic wave is radiated to the liquid surface by using the tube as a waveguide, the reception time of the ultrasonic wave reflected by the reflector and the reception time of the ultrasonic wave reflected by the liquid surface are measured, and those reception times are measured. In an ultrasonic liquid level meter that detects the distance to the liquid surface by determining the ratio of, the tube is cut at the position where the reflection plate should be provided, and the reflection plate is placed at the cut portion, and the pipe is connected by the joint. Is connected.
【００１４】又、本発明の超音波式液面レベル計の超音
波導波管は、前記超音波素子を挿入した第１の管と、こ
の第１の管の内径と等しい内径を持つ第２の管と、前記
第１の管と第２の管の突き当て部位に相当する位置に第
１の管の内径よりわずかに内径が小さい超音波反射リン
グを組み込み、導波管を構成することを特徴とするもの
である。The ultrasonic wave guide of the ultrasonic liquid level meter of the present invention includes a first tube having the ultrasonic element inserted therein and a second tube having an inner diameter equal to the inner diameter of the first tube. And a ultrasonic reflecting ring having an inner diameter slightly smaller than the inner diameter of the first tube at a position corresponding to the abutting portion of the first tube and the second tube, thereby forming a waveguide. It is a feature.
【００１５】又、本発明の超音波式液面レベル計の超音
波導波管は、前記超音波素子を挿入した第１の管と、こ
の第１の管の内径と等しい内径を持つ第２の管と、前記
第１の管と第２の管の突き当て部位に相当する位置に第
１の管の内径よりわずかに内径が小さいリング状超音波
反射突起を一体化成形加工した継ぎ手を用いて、導波管
を構成することを特徴とするものである。Further, the ultrasonic wave guide of the ultrasonic type liquid level meter of the present invention includes a first tube into which the ultrasonic element is inserted, and a second tube having an inner diameter equal to the inner diameter of the first tube. And a joint in which a ring-shaped ultrasonic reflection protrusion having an inner diameter slightly smaller than the inner diameter of the first pipe is integrally formed at a position corresponding to the abutting portion of the first pipe and the second pipe. It is characterized by constituting a waveguide.
【００１６】又、本発明の超音波式液面レベル計の超音
波導波管は、前記超音波素子を挿入した第１の管と、該
第１の管に継ぎ足された、該第１の管の内径よりわずか
に内径が小さい第２の管とで構成され、前記第１の管と
第２の管の継ぎ目にリング状の超音波反射段差を設けた
ことを特徴とするものである。The ultrasonic wave guide of the ultrasonic liquid level meter according to the present invention includes a first tube in which the ultrasonic element is inserted and the first tube connected to the first tube. A second tube having an inner diameter slightly smaller than the inner diameter of the tube, and a ring-shaped ultrasonic reflection step is provided at the joint between the first tube and the second tube.
【００１７】[0017]
【作用】本発明は、超音波導波管の内部に余分な突起や
窪みを作ることのないように該超音波導波管を切断し、
また、反射板および継ぎ手を構成して接続するために、
液面レベル計として組立後は、所定の反射板機能を果た
すこと以外には超音波を乱さず、切断部を持たない１本
の超音波導波管に単に反射板を設けたのと機能上何ら変
わるところがない。According to the present invention, the ultrasonic waveguide is cut so as not to make extra protrusions or depressions inside the ultrasonic waveguide,
Also, to configure and connect the reflector and joint,
After being assembled as a liquid level meter, it does not disturb ultrasonic waves other than fulfilling a predetermined reflection plate function, and a reflection plate is simply provided on a single ultrasonic waveguide that does not have a cut portion. There is no change.
【００１８】また、液面レベル計として使用する以前に
は、該超音波導波管を分割してコンパクトに保管・運搬
することができ、使用時には容易に組立ることができ
る。Further, before being used as a liquid level meter, the ultrasonic waveguide can be divided and stored and transported compactly, and can be easily assembled at the time of use.
【００１９】[0019]
【実施例】以下、図１〜図４を参照して本発明の実施例
を詳細に説明する。図１〜図３は本発明の各実施例を示
す断面図であり、図４は図１〜図３の各実施例の各構成
部材を示す斜視図である。Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 3 are sectional views showing respective embodiments of the present invention, and FIG. 4 is a perspective view showing respective constituent members of the respective embodiments of FIGS. 1 to 3.
【００２０】図１は本発明の第１の実施例を示す断面図
である。FIG. 1 is a sectional view showing a first embodiment of the present invention.
【００２１】１本の超音波導波管を反射板挿入位置で該
管の内側にバリや面取りが生じないように切断して第１
の超音波導波管２−１と第２の超音波導波管２−２に分
割する。切断された両管２−１，２−２には、端部から
一定の長さの外周面に雄ねじ７−１，７−２を切る。こ
れを組み立てるには、超音波素子１を挿入した第１の超
音波導波管２−１を、該雄ねじ７−１と適合する雌ねじ
８をもつ継ぎ手４の中央部までねじ込む。その後、第１
の超音波導波管２−１の端部に雄ねじ７−１の内径に等
しい外径と該管２−１の内径よりわずかに小さい内径を
持つ同心円板状の超音波反射リング３を挿入する。その
後、接続すべき第２の超音波導波管２−２を該継ぎ手４
にねじ込み、該リング３をしっかりと挟み込む。第２の
超音波導波管２−２をさらに伸長したいときには、第２
の超音波導波管２−２の他端にも雄ねじを切り、同様に
ねじ切りした第３の超音波導波管を継ぎ足すことができ
る。ただし、第２の超音波導波管２−２と第３の超音波
導波管との接続にはリング３を用いない。このようにし
て継ぎ手４で管を接続することにより、測定に必要な長
さの超音波導波管を構成することができる。First, one ultrasonic waveguide is cut at the position where the reflection plate is inserted so that burrs and chamfers do not occur inside the first waveguide.
The ultrasonic waveguide 2-1 and the second ultrasonic waveguide 2-2 are divided. On both of the cut tubes 2-1, 2-2, male threads 7-1, 7-2 are cut from the ends to the outer peripheral surface of a constant length. In order to assemble this, the first ultrasonic waveguide 2-1 in which the ultrasonic element 1 is inserted is screwed up to the center of the joint 4 having the female screw 8 that matches the male screw 7-1. Then the first
Into the end of the ultrasonic wave guide 2-1 is inserted a concentric disc-shaped ultrasonic wave reflection ring 3 having an outer diameter equal to the inner diameter of the male screw 7-1 and an inner diameter slightly smaller than the inner diameter of the pipe 2-1. . After that, the second ultrasonic waveguide 2-2 to be connected is connected to the joint 4
Screw it in and firmly clamp the ring 3. When it is desired to further extend the second ultrasonic waveguide 2-2,
The other end of the ultrasonic waveguide 2-2 can also be externally threaded, and a similarly threaded third ultrasonic waveguide can be added. However, the ring 3 is not used to connect the second ultrasonic waveguide 2-2 and the third ultrasonic waveguide. By connecting the pipes with the joint 4 in this manner, an ultrasonic waveguide having a length required for measurement can be constructed.
【００２２】しかしながら、該リング３の厚さは該継ぎ
手４のねじピッチと同等以外になるため、図１の実施例
では組立時に該リング３が該継ぎ手４の雌ねじ８に引っ
かかったり、雌ねじ８の谷に落ち込み易く、それに気付
かずにねじを締め込むと該リング３が変形したり偏心し
て固定される恐れがあり、誤動作の原因となる。However, since the thickness of the ring 3 is not equal to the thread pitch of the joint 4, in the embodiment of FIG. 1, the ring 3 is caught by the female screw 8 of the joint 4 or the female screw 8 of the joint 4 is assembled. It is easy to fall into the valley, and if the screw is tightened without noticing it, the ring 3 may be deformed or eccentrically fixed, resulting in malfunction.
【００２３】この欠点を解消し、組立がより簡単・確実
で実現性が高く、経済的な構造を実現するためになされ
たのが、図２および図３の実施例である。The embodiment shown in FIGS. 2 and 3 has been made in order to solve this drawback and to realize an economical structure which is simpler and more reliable to assemble, has a high possibility of being realized.
【００２４】図２は本発明の第２の実施例を示す断面図
である。継ぎ手４１の雌ねじ８の中央部に、図１の実施
例に用いた超音波反射リング３相当のリング状超音波反
射突起３−１を一体成形加工してあり、このリング状超
音波反射突起３−１付き継ぎ手４１の両側に、超音波素
子１を挿入した第１の超音波導波管２−１と、この第１
の超音波導波管２−１に接続すべき第２の超音波導波管
２−２とをねじ込み、しっかりと締め付ける。FIG. 2 is a sectional view showing a second embodiment of the present invention. A ring-shaped ultrasonic reflection protrusion 3-1 corresponding to the ultrasonic reflection ring 3 used in the embodiment of FIG. 1 is integrally formed in the central portion of the female screw 8 of the joint 41. The first ultrasonic waveguide 2-1 in which the ultrasonic element 1 is inserted on both sides of the joint 41 with -1 and the first ultrasonic waveguide 2-1.
The second ultrasonic wave guide 2-2 to be connected to the second ultrasonic wave guide 2-1 is screwed in and firmly tightened.
【００２５】図３は超音波素子１を挿入した第１の超音
波導波管２−１と、該第１の超音波導波管２−１と比べ
て外径が等しく、内径がわずかに小さい第２の超音波導
波管２−３とを継ぎ手４により継ぎ足すことにより、第
１の超音波導波管２−１と第２の超音波導波管２−３の
継ぎ目にリング状超音波反射段差９を設ける。このリン
グ状超音波反射段差９を設けることにより、特別な反射
板を用いることなく、両管２−１，２−３の継ぎ目の内
径の段差９が反射板の機能を果たすようにしたものであ
る。In FIG. 3, the outer diameter of the first ultrasonic waveguide 2-1 having the ultrasonic element 1 inserted therein is equal to that of the first ultrasonic waveguide 2-1 and the inner diameter thereof is slightly smaller than that of the first ultrasonic waveguide 2-1. By adding the small second ultrasonic waveguide 2-3 with the joint 4, a ring shape is formed at the joint between the first ultrasonic waveguide 2-1 and the second ultrasonic waveguide 2-3. An ultrasonic wave reflecting step 9 is provided. By providing this ring-shaped ultrasonic wave reflection step 9, the step 9 of the inner diameter of the joint between the two tubes 2-1 and 2-3 can function as a reflection plate without using a special reflection plate. is there.
【００２６】図２の実施例では継ぎ手４１の内部に雌ね
じ８とリング状超音波反射突起３−１を一体成形加工す
るために、細心の注意を払って高精度の加工をする必要
があるが、図３の実施例では図１における継ぎ手と同等
の、単に雌ねじ８を切っただけの継ぎ手４を使用するだ
けでよい利点がある。In the embodiment shown in FIG. 2, since the female screw 8 and the ring-shaped ultrasonic reflection projection 3-1 are integrally formed inside the joint 41, it is necessary to perform the processing with great care and with high precision. In the embodiment shown in FIG. 3, there is an advantage similar to the joint shown in FIG. 1 in that it is only necessary to use the joint 4 in which the internal thread 8 is cut.
【００２７】[0027]
【発明の効果】以上説明したように、本発明によれば、
長い管の中間位置の内部に超音波反射板を設置するとい
う、大変やり辛い作業を行うことなく、これを管端にお
ける簡単な作業に置き換えることができる。このため、
高精度液面レベル計としての基準位置検出に必要な超音
波反射板機能を容易に実現することができる。この結
果、組立作業工数が削減でき、経済化が図れるほか、完
成した液面レベル計を長尺のまま保管・運搬する際の不
便さを解消し、コンパクトに分割して保管・運搬するこ
とができるため、精密測定器としての管理が容易に経済
的に行われるようになる効果がある。As described above, according to the present invention,
This can be replaced by a simple operation at the end of the tube, without the laborious task of installing the ultrasonic reflector inside the middle position of the long tube. For this reason,
The ultrasonic reflector function required for detecting the reference position as a high-accuracy liquid level meter can be easily realized. As a result, the man-hours for assembly work can be reduced, the economy can be improved, and the inconvenience of storing and transporting a completed liquid level meter as a long length can be eliminated, and it can be divided and stored and transported compactly. Therefore, there is an effect that the precision measuring device can be easily and economically managed.
【図１】本発明の第１の実施例を示す縦断面図である。FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.
【図２】本発明の第２の実施例を示す縦断面図である。FIG. 2 is a vertical cross-sectional view showing a second embodiment of the present invention.
【図３】本発明の第３の実施例を示す縦断面図である。FIG. 3 is a vertical sectional view showing a third embodiment of the present invention.
【図４】図１〜図３の各実施例の各構成部材を示す斜視
図である。FIG. 4 is a perspective view showing each constituent member of each embodiment of FIGS. 1 to 3;
【図５】従来技術から想到される反射板取付構造の例を
示す超音波導波管の横断面図である。FIG. 5 is a cross-sectional view of an ultrasonic waveguide showing an example of a reflector mounting structure conceived from the prior art.
【図６】従来の超音波式液面レベル計の一例を示す構成
図である。FIG. 6 is a configuration diagram showing an example of a conventional ultrasonic liquid level meter.
１…超音波素子、２…超音波導波管、２−１…第１の超
音波導波管、２−２…第２の超音波導波管、２−３…第
２の超音波導波管、３…超音波反射リング、４…継ぎ
手、４１…継ぎ手、５…ピンまたは小ねじ、６…接着
剤、７−１，７−２…雄ねじ、８…雌ねじ、９…リング
状超音波反射段差、３１…超音波反射細線、３２…超音
波反射細線リング、３２−１…細線リング３２の両端
末、３２−２…細線リング３２の中間突起。DESCRIPTION OF SYMBOLS 1 ... Ultrasonic element, 2 ... Ultrasonic waveguide, 2-1 ... 1st ultrasonic waveguide, 2-2 ... 2nd ultrasonic waveguide, 2-3 ... 2nd ultrasonic guide Wave tube, 3 ... Ultrasonic reflection ring, 4 ... Joint, 41 ... Joint, 5 ... Pin or machine screw, 6 ... Adhesive, 7-1, 7-2 ... Male screw, 8 ... Female screw, 9 ... Ring-shaped ultrasonic wave Reflection step, 31 ... Ultrasonic reflection fine wire, 32 ... Ultrasonic reflection fine wire ring, 32-1 ... Both ends of the fine wire ring 32, 32-2 ... Intermediate protrusion of the fine wire ring 32.
Claims (4)
該超音波素子から一定の距離を隔てた管内部の断面の一
部に微小な反射板を設け、管の他端を液中に浸すように
構成すると共に、該管を導波管として超音波を液面に放
射し、該反射板で反射された超音波の受信時間と、液面
で反射された超音波の受信時間とを計測し、それらの受
信時間の比を求めることにより、液面までの距離を検出
する超音波式液面レベル計において、反射板を設けるべ
き位置で管を切断し、該切断部に反射板が配置され、継
ぎ手で前記管が接続されていることを特徴とする超音波
式液面レベル計の超音波導波管。1. An ultrasonic element is inserted into one end inside a tube,
A minute reflecting plate is provided on a part of the cross section inside the tube that is separated from the ultrasonic element by a certain distance, and the other end of the tube is soaked in the liquid. Is radiated to the liquid surface, the reception time of the ultrasonic waves reflected by the reflector and the reception time of the ultrasonic waves reflected by the liquid surface are measured, and the ratio of those reception times is calculated to obtain the liquid surface. In the ultrasonic liquid level meter for detecting the distance to, the tube is cut at the position where the reflection plate should be provided, the reflection plate is arranged at the cut portion, and the pipe is connected by a joint. Ultrasonic wave guide of ultrasonic level meter.
この第１の管の内径と等しい内径を持つ第２の管と、前
記第１の管と第２の管の突き当て部位に相当する位置に
第１の管の内径よりわずかに内径が小さい超音波反射リ
ングを組み込み、導波管を構成することを特徴とする請
求項１記載の超音波式液面レベル計の超音波導波管。2. A first tube in which the ultrasonic element is inserted,
A second tube having an inner diameter equal to the inner diameter of the first tube, and a super-tube having an inner diameter slightly smaller than the inner diameter of the first tube at a position corresponding to an abutting portion of the first tube and the second tube. The ultrasonic wave guide of the ultrasonic type liquid level meter according to claim 1, wherein a wave guide is constructed by incorporating a sound wave reflection ring.
この第１の管の内径と等しい内径を持つ第２の管と、前
記第１の管と第２の管の突き当て部位に相当する位置に
第１の管の内径よりわずかに内径が小さいリング状超音
波反射突起を一体化成形加工した継ぎ手を用いて、導波
管を構成することを特徴とする請求項１記載の超音波式
液面レベル計の超音波導波管。3. A first tube in which the ultrasonic element is inserted,
A second tube having an inner diameter equal to the inner diameter of the first tube, and a ring having an inner diameter slightly smaller than the inner diameter of the first tube at a position corresponding to an abutting portion of the first tube and the second tube. The ultrasonic wave guide of the ultrasonic liquid level meter according to claim 1, wherein the wave guide is configured by using a joint in which the ultrasonic wave reflection protrusions are integrally molded.
該第１の管に継ぎ足された、該第１の管の内径よりわず
かに内径が小さい第２の管とで構成され、前記第１の管
と第２の管の継ぎ目にリング状の超音波反射段差を設け
たことを特徴とする請求項１記載の超音波式液面レベル
計の超音波導波管。4. A first tube in which the ultrasonic element is inserted,
A second pipe having an inner diameter slightly smaller than the inner diameter of the first pipe, which is added to the first pipe, and has a ring-shaped ultrasonic wave at a joint between the first pipe and the second pipe. The ultrasonic waveguide of the ultrasonic liquid level meter according to claim 1, wherein a reflective step is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06241620A JP3135193B2 (en) | 1994-10-05 | 1994-10-05 | Ultrasonic waveguide for ultrasonic liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06241620A JP3135193B2 (en) | 1994-10-05 | 1994-10-05 | Ultrasonic waveguide for ultrasonic liquid level gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08105784A true JPH08105784A (en) | 1996-04-23 |
| JP3135193B2 JP3135193B2 (en) | 2001-02-13 |
Family
ID=17077040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06241620A Expired - Lifetime JP3135193B2 (en) | 1994-10-05 | 1994-10-05 | Ultrasonic waveguide for ultrasonic liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3135193B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100511206B1 (en) * | 2001-12-24 | 2005-08-31 | 한국과학기술원 | Apparatus for two-phase mixture level measurment using ultrasonic |
| JP2013140099A (en) * | 2012-01-05 | 2013-07-18 | Hitachi-Ge Nuclear Energy Ltd | Ultrasonic reactor water level measuring device and method |
| CN111463538A (en) * | 2019-01-22 | 2020-07-28 | Vega格里沙贝两合公司 | High-conductivity waveguide for high-temperature and high-frequency of level measuring device |
| CN111478005A (en) * | 2019-01-24 | 2020-07-31 | Vega格里沙贝两合公司 | Metallized dielectric waveguide |
| JP2022018665A (en) * | 2020-07-16 | 2022-01-27 | セイコーエプソン株式会社 | Ultrasonic sensor and method for controlling ultrasonic sensor |
-
1994
- 1994-10-05 JP JP06241620A patent/JP3135193B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100511206B1 (en) * | 2001-12-24 | 2005-08-31 | 한국과학기술원 | Apparatus for two-phase mixture level measurment using ultrasonic |
| JP2013140099A (en) * | 2012-01-05 | 2013-07-18 | Hitachi-Ge Nuclear Energy Ltd | Ultrasonic reactor water level measuring device and method |
| US9212943B2 (en) | 2012-01-05 | 2015-12-15 | Hitachi-Ge Nuclear Energy, Ltd. | Ultrasonic reactor water level measuring device and evaluation method |
| CN111463538A (en) * | 2019-01-22 | 2020-07-28 | Vega格里沙贝两合公司 | High-conductivity waveguide for high-temperature and high-frequency of level measuring device |
| US11594799B2 (en) | 2019-01-22 | 2023-02-28 | Vega Grieshaber Kg | Waveguide arrangement having a waveguide tube with an outer wall spaced from an inner wall of a jacket by a distance less than 100 μm |
| CN111463538B (en) * | 2019-01-22 | 2024-04-26 | Vega格里沙贝两合公司 | High-conductivity waveguide for high-temperature high-frequency of material level measuring device |
| CN111478005A (en) * | 2019-01-24 | 2020-07-31 | Vega格里沙贝两合公司 | Metallized dielectric waveguide |
| US11557841B2 (en) | 2019-01-24 | 2023-01-17 | Vega Grieshaber Kg | Metallized dielectric waveguide |
| JP2022018665A (en) * | 2020-07-16 | 2022-01-27 | セイコーエプソン株式会社 | Ultrasonic sensor and method for controlling ultrasonic sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3135193B2 (en) | 2001-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4930358A (en) | Method of and apparatus for measuring flow velocity by using ultrasonic waves | |
| US5728948A (en) | Fluid meter construction | |
| CN100455996C (en) | flow meter | |
| EP2270439B1 (en) | Flow meter with moulded reflector unit | |
| RU2255311C2 (en) | Improved measuring system of speed of passing gas by means of ultrasound | |
| US9279708B2 (en) | Ultrasonic flowmeter | |
| WO1996024029A1 (en) | Ultrasonic flowmeter 'w' | |
| JPH054005B2 (en) | ||
| CN113167619A (en) | Ultrasonic transducer device for clamping an ultrasonic flow measuring point, method for clamping an ultrasonic flow measuring point and method for putting an ultrasonic flow measuring point into operation | |
| EP1995570A1 (en) | An ultrasound flow meter | |
| JP7223956B2 (en) | ultrasonic flow meter | |
| JPH08105784A (en) | Ultrasonic wave guide for ultrasonic level meter | |
| CN113167618B (en) | Ultrasonic transducer device for a clamp-on ultrasonic flow measurement point, clamp-on ultrasonic flow measurement point and method for operating a clamp-on ultrasonic flow measurement point | |
| US20160187171A1 (en) | Reflector Array For Transit-Time Flow Measurement | |
| JP4707088B2 (en) | Ultrasonic flow meter | |
| JP3711885B2 (en) | Pipe internal pressure measuring device and pipe internal pressure measuring method | |
| JPH10274551A (en) | Ultrasonic flow meter | |
| JP3013596B2 (en) | Transmission ultrasonic flowmeter | |
| JPS60151516A (en) | Ultrasonic flow meter | |
| CN222353284U (en) | Centrosymmetric stamping ultrasonic watch case | |
| JPS6312440B2 (en) | ||
| JP2004233122A (en) | Ultrasonic flow meter | |
| JP2537709Y2 (en) | Ultrasonic liquid level gauge | |
| JP2505647Y2 (en) | Ultrasonic flow meter | |
| CN116831615B (en) | Ultrasonic probe and method for measuring curvature information thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071201 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081201 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091201 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101201 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101201 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111201 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111201 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121201 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121201 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131201 Year of fee payment: 13 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |