JP3402726B2 - Bubble imaging device - Google Patents
Bubble imaging deviceInfo
- Publication number
- JP3402726B2 JP3402726B2 JP02243594A JP2243594A JP3402726B2 JP 3402726 B2 JP3402726 B2 JP 3402726B2 JP 02243594 A JP02243594 A JP 02243594A JP 2243594 A JP2243594 A JP 2243594A JP 3402726 B2 JP3402726 B2 JP 3402726B2
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- transmission
- sensors
- pipe
- ultrasonic sensors
- 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.)
- Expired - Lifetime
Links
- 238000003384 imaging method Methods 0.000 title claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 46
- 230000002194 synthesizing effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 102200052313 rs9282831 Human genes 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Image Processing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、配管内の液体中の気泡
の映像化に適用される気泡映像化装置に関する。
【０００２】
【従来の技術】従来の配管内の液体中の気泡を映像化す
る気泡映像化装置においては、図４及び図５に示すよう
に、複数個の超音波センサ２１は配管１１の外周に沿っ
て１列に配設されており、それぞれの超音波センサ２１
が送信した超音波送信ビーム４１は配管１１の軸中心を
中心点として対称の位置に配設された超音波センサ２１
を中心に受信される垂直型であった。
【０００３】上記それぞれの超音波センサ２１は超音波
送受切替装置２３を介して超音波送受信器２４が接続さ
れており、それぞれの超音波センサ２１により受信され
た超音波は上記超音波送受切替装置２３を介して超音波
送受信器２４に入力され、同送受信器２４より映像化デ
ータが映像合成処理装置２５に入力され、映像の合成が
行われて表示装置１０により表示されていた。
【０００４】
【発明が解決しようとする課題】従来の気泡映像化装置
において、超音波センサが配管内に発射する超音波送信
ビームはその拡がりが狭く、気泡が超音波送信ビーム中
に存在する時間が短いため、映像化された気泡はその断
面についての表示は良好であるが、映像化情報が不足の
ため、全体表示ができないという課題があった。本発明
は上記の課題を解決しようとするものである。
【０００５】
【課題を解決するための手段】本発明の気泡映像化装置
は、配管の外表面の円周方向に１列に配設された複数個
の第１の超音波センサ、同第１の超音波センサとの間に
配管の軸方向に一定間隔を有して配管の外表面の円周方
向に１列に配設された複数個の第２の超音波センサ、同
第１と第２の超音波センサがそれぞれ第１と第２の超音
波送受切替装置を介して接続された第１と第２の超音波
送受信器、および同第１と第２の超音波送受信器に接続
され表示装置が設けられた映像合成処理装置を備え、前
記第１、第２の超音波センサは斜角型の超音波センサで
あり、前記第１、第２の超音波送受切替装置は前記第
１、第２の超音波センサのうち１個を送信として他は受
信とし、同送信とするものを順々に切替えることを特徴
としている。
【０００６】
【作用】上記において、第１の超音波送受切替装置は、
常に１個のみが送信用となるように第１の超音波センサ
を順次切替え、送信用に切替えられた超音波センサに第
１の超音波送受信器より送信信号を伝送する。
【０００７】送信信号を受信した第１の超音波センサは
配管内の液体中に超音波送信ビームを発射し、液体中の
気泡に当って生じた超音波反射ビームが送信中でない他
の第１と第２の超音波センサに受信され、第１と第２の
超音波送受切替装置を介して第１と第２の超音波送受信
器に伝送される。
【０００８】第２の超音波送受切替装置の場合も、第１
の超音波送受切替装置と同様に第２の超音波センサにつ
いて送信用への順次切替えが行われ、気泡によって生じ
た超音波反射ビームが送信中でない他の第１と第２の超
音波センサに受信され、第１と第２の超音波送受信器に
伝送される。
【０００９】上記第１と第２の超音波センサにより受信
された超音波反射ビームが伝送された第１と第２の超音
波送受信器は映像化データを映像化処理装置に入力する
が、上記第１と第２の超音波センサの切替えが一巡する
と映像化データの採取を完了し、映像化処理装置はこの
データより気泡の映像を形成し、表示装置に表示する。
【００１０】上記のように、超音波反射ビームは配管の
外表面に一定間隔を有して円周方向に２列に配設された
超音波センサにより受信されるため、従来の装置に比べ
て気泡の映像化データが格段に増加し、気泡の断面表示
ばかりでなく、気泡全体の映像化が可能となる。
【００１１】
【実施例】本発明の一実施例を図１乃至図３により説明
する。図１乃至図３において、１は、配管１１内の液体
の流れの上流側であって、配管１１の外周に沿って１列
に配設された複数個の超音波センサであり、それぞれリ
ード線３が接続されている。
【００１２】２は、上記超音波センサ１との間に一定間
隔を有して液体の流れの下流側に上記超音波センサ１と
同様に配設された超音波センサであり、それぞれリード
線４が接続されており、超音波センサ１および２はいず
れも斜角型の超音波センサであって、超音波センサ２が
送信する超音波送信ビーム３１は配管の中心軸と交差し
て超音波センサ１により受信され、超音波センサ１が送
信した超音波送信ビーム３１も同様に超音波センサ２に
より受信される。
【００１３】５および６は、それぞれ上流側及び下流側
の超音波センサ１，２が接続されてそれぞれの送信、受
信の切替えを行う超音波送受切替装置で、同装置５，６
はこれに接続されている超音波センサ１，２のうちの１
個のみを送信として他は全て受信とし、送信とする超音
波センサ１，２を順々に切替え、最後の超音波センサ
１，２が送信を終了したときに映像化データの採取を完
了する。
【００１４】７および８は、超音波送受切替装置５，６
にそれぞれ接続された超音波送受信器で、超音波センサ
１，２が送信に選ばれたときのみ送信となり、他は受信
となっている。
【００１５】９は、超音波送受信器７，８にて受信した
気泡１２からの超音波反射データを集め合成する映像合
成処理装置である。１０は、映像合成処理装置９で映像
合成処理されたデータを２次元および３次元に表示する
表示装置である。
【００１６】上記において、上流側の超音波センサ１が
接続された超音波送受切替装置５は、常に１個のみが送
信用となるように超音波センサ１を順次切替え、送信用
に切替えられた超音波センサ１に超音波送受信器７より
送信信号を伝送する。
【００１７】送信信号が伝送された超音波センサ１は、
配管１１内の液体中に超音波送信ビーム３１を発射し、
液体中の気泡１２により超音波反射ビーム範囲３２で反
射した超音波反射ビームは送信中でない他の超音波セン
サ１，２により受信され、超音波送受切替装置５，６を
介して超音波送受信器７，８に伝送され、同送受信器
７，８は映像化データを映像合成処理装置９に入力す
る。
【００１８】下流側の超音波センサ２が接続された超音
波送受切替装置６についても上記と同様であり、超音波
センサ２を順次送信用に切替えて超音波発信ビーム３１
を発射させ、気泡１２による超音波反射ビームを送信中
でない他の超音波センサ１，２により受信する。
【００１９】上記超音波送受切替装置５，６による超音
波センサ１，２の送信用へ切替えが一巡すると、映像化
データの採取は完了し、これらのデータより映像合成処
理装置９が気泡の映像を形成し、表示装置１０がこれを
表示する。
【００２０】上記のように、超音波センサは配管の外周
に沿って２列に配設されたため、従来の装置と比べて気
泡の映像化データが格段に増加し、気泡の断面表示のみ
ならず、気泡全体の映像化が可能となった。
【００２１】
【発明の効果】本発明の気泡映像化装置は、配管の外表
面の円周方向にそれぞれ複数個が１列に配設されその列
間に一定間隔を有する第１と第２の超音波センサと、同
第１と第２の超音波センサが第１と第２の超音波送受切
替装置を介して接続された第１と第２の超音波送受信器
と、同第１と第２の超音波送受信器に接続され表示装置
が設けられた映像合成処理装置を備え、かつ、前記第
１、第２の超音波センサは斜角型の超音波センサであ
り、前記第１、第２の超音波送受切替装置は前記第１、
第２の超音波センサのうち１個を送信として他は受信と
し、同送信とするものを順々に切替えることによって、
気泡で反射した超音波反射ビームは２列に配設された斜
角型の超音波センサにより受信されるため、従来の装置
に比べて気泡の映像化データが格段に増加し、気泡の断
面表示ばかりでなく、気泡全体の映像化が可能となる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for imaging bubbles in a liquid in a pipe. 2. Description of the Related Art In a conventional bubble imaging apparatus for imaging bubbles in a liquid in a pipe, as shown in FIGS. Are arranged in a single row along each of the ultrasonic sensors 21.
The ultrasonic transmission beam 41 transmitted by the ultrasonic sensor 21 is disposed at a position symmetrical with respect to the center of the axis of the pipe 11.
It was a vertical type that was received mainly. Each of the ultrasonic sensors 21 is connected to an ultrasonic transceiver 24 via an ultrasonic transmission / reception switching device 23, and the ultrasonic waves received by each ultrasonic sensor 21 are transmitted to the ultrasonic transmission / reception switching device 23. The image data is input to the ultrasonic transmitter / receiver 24 via the transmitter / receiver 23, and the image data is input to the image synthesizing processor 25 from the transmitter / receiver 24, and the images are synthesized and displayed on the display device 10. [0004] In the conventional bubble imaging device, the ultrasonic transmission beam emitted from the ultrasonic sensor into the pipe has a narrow spread, and the time during which bubbles are present in the ultrasonic transmission beam. However, there is a problem in that the imaged bubbles can be displayed well on the cross section because of the shortness of the image, but cannot be displayed entirely because of insufficient imaging information. The present invention seeks to solve the above problems. [0005] A bubble imaging device according to the present invention comprises a plurality of first ultrasonic sensors arranged in a row in a circumferential direction on an outer surface of a pipe. A plurality of second ultrasonic sensors arranged in a line in a circumferential direction on the outer surface of the pipe with a certain interval in the axial direction of the pipe between the ultrasonic sensors, and the first and the second ultrasonic sensors. Two ultrasonic sensors are connected to the first and second ultrasonic transceivers and the first and second ultrasonic transceivers connected via the first and second ultrasonic transmission / reception switching devices, respectively. comprising a video synthesis processing apparatus to which the display device is provided, prior to
The first and second ultrasonic sensors are oblique ultrasonic sensors.
The first and second ultrasonic transmission / reception switching devices
One of the first and second ultrasonic sensors is transmitted and the others are received.
It is characterized in that the communication and the transmission are sequentially switched . [0006] In the above, the first ultrasonic transmission and reception switching device,
The first ultrasonic sensor is sequentially switched so that only one is always used for transmission, and a transmission signal is transmitted from the first ultrasonic transceiver to the ultrasonic sensor switched for transmission. [0007] The first ultrasonic sensor that has received the transmission signal emits an ultrasonic transmission beam into the liquid in the pipe, and the ultrasonic reflected beam generated by hitting a bubble in the liquid is not transmitted to another first ultrasonic sensor. And the second ultrasonic sensor, and transmitted to the first and second ultrasonic transceivers via the first and second ultrasonic transmission / reception switching devices. In the case of the second ultrasonic transmission / reception switching device, the first
As in the case of the ultrasonic transmission / reception switching device, the second ultrasonic sensor is sequentially switched to transmission, and the ultrasonic reflected beam generated by the bubble is transmitted to the other first and second ultrasonic sensors that are not transmitting. Received and transmitted to the first and second ultrasonic transceivers. The first and second ultrasonic transceivers to which the ultrasonic reflected beams received by the first and second ultrasonic sensors have been transmitted input imaging data to an imaging processor. When the switching between the first and second ultrasonic sensors has been completed, the collection of the imaging data is completed, and the imaging processing device forms an image of the bubble from the data and displays the image on the display device. As described above, the ultrasonic reflected beam is received by the ultrasonic sensors arranged in two rows in the circumferential direction at a constant interval on the outer surface of the pipe. The image data of the bubble is remarkably increased, and not only the cross section of the bubble can be displayed but also the entire bubble can be visualized. An embodiment of the present invention will be described with reference to FIGS. 1 to 3, reference numeral 1 denotes a plurality of ultrasonic sensors arranged in a line along the outer periphery of the pipe 11 on the upstream side of the flow of the liquid in the pipe 11, each of which is a lead wire. 3 are connected. Reference numeral 2 denotes an ultrasonic sensor which is disposed at a certain interval between the ultrasonic sensor 1 and the downstream side of the flow of the liquid in the same manner as the ultrasonic sensor 1. Are connected, the ultrasonic sensors 1 and 2 are both oblique ultrasonic sensors, and the ultrasonic transmission beam 31 transmitted by the ultrasonic sensor 2 intersects the center axis of the pipe and the ultrasonic sensor The ultrasonic transmission beam 31 received by the ultrasonic sensor 1 and transmitted by the ultrasonic sensor 1 is also received by the ultrasonic sensor 2. Reference numerals 5 and 6 denote ultrasonic transmission / reception switching devices connected to the upstream and downstream ultrasonic sensors 1 and 2, respectively, for switching between transmission and reception.
Is one of the ultrasonic sensors 1 and 2 connected to the
The ultrasonic sensors 1 and 2 to be transmitted are sequentially switched, and the collection of the imaging data is completed when the transmission of the last ultrasonic sensors 1 and 2 is completed. 7 and 8 are ultrasonic transmission / reception switching devices 5, 6
Are transmitted only when the ultrasonic sensors 1 and 2 are selected for transmission by the ultrasonic transceivers respectively connected to the other, and are received when the other ultrasonic sensors 1 and 2 are selected for transmission. Reference numeral 9 denotes an image synthesizing processor for collecting and synthesizing ultrasonic reflection data from the air bubbles 12 received by the ultrasonic transmitters / receivers 7 and 8. Reference numeral 10 denotes a display device that displays the data subjected to the video synthesis processing by the video synthesis processing device 9 two-dimensionally and three-dimensionally. In the above description, the ultrasonic transmission / reception switching device 5 to which the upstream ultrasonic sensor 1 is connected, sequentially switches the ultrasonic sensors 1 so that only one is always used for transmission, and is switched for transmission. A transmission signal is transmitted from the ultrasonic transceiver 7 to the ultrasonic sensor 1. The ultrasonic sensor 1 to which the transmission signal has been transmitted,
Launching an ultrasonic transmission beam 31 into the liquid in the pipe 11;
The ultrasonic reflected beam reflected in the ultrasonic reflected beam range 32 by the bubbles 12 in the liquid is received by the other ultrasonic sensors 1 and 2 which are not transmitting, and is transmitted and received via the ultrasonic transmission / reception switching devices 5 and 6. The transceivers 7 and 8 input the imaged data to the image synthesis processing device 9. The same applies to the ultrasonic transmission / reception switching device 6 to which the ultrasonic sensor 2 on the downstream side is connected. The ultrasonic sensor 2 is sequentially switched for transmission and the ultrasonic transmission beam 31
Is emitted, and the other ultrasonic sensors 1 and 2 that are not transmitting the ultrasonic reflected beam by the bubble 12 receive the beam. When the switching of the ultrasonic sensors 1 and 2 for transmission by the ultrasonic transmission / reception switching devices 5 and 6 completes, the collection of the imaging data is completed, and the image synthesizing processing device 9 uses the data to display the image of the bubble. Is formed, and the display device 10 displays this. As described above, since the ultrasonic sensors are arranged in two rows along the outer circumference of the pipe, the imaging data of the air bubbles is significantly increased as compared with the conventional apparatus, and not only the cross-section display of the air bubbles but also the ultrasonic sensors are displayed. Thus, the entire bubble can be visualized. According to the bubble imaging device of the present invention, a plurality of the plurality of tubes are arranged in a row in the circumferential direction of the outer surface of the pipe, and the first and the second have a fixed interval between the rows. An ultrasonic sensor, first and second ultrasonic transceivers in which the first and second ultrasonic sensors are connected via first and second ultrasonic transmission / reception switching devices, and first and second ultrasonic sensors. A video synthesis processing device connected to the second ultrasonic transceiver and provided with a display device , and
The first and second ultrasonic sensors are oblique ultrasonic sensors.
In addition, the first and second ultrasonic transmission / reception switching devices include the first and second ultrasonic transmission / reception switching devices.
One of the second ultrasonic sensors is transmitted and the others are received.
Then, by sequentially switching what is assumed to be the same transmission ,
The ultrasonic reflected beam reflected by the bubbles is obliquely arranged in two rows.
Since the data is received by the rectangular ultrasonic sensor, the imaging data of the air bubbles is significantly increased as compared with the conventional apparatus, so that not only the cross-section display of the air bubbles but also the entire air bubbles can be imaged.
【図面の簡単な説明】
【図１】本発明の一実施例の説明図で、（ａ）は配管に
配設された超音波センサの説明図、（ｂ）は超音波セン
サに接続された装置の説明図である。
【図２】上記一実施例に係る作用説明図で、（ａ）は上
流側の超音波センサが超音波を発射している状態の説明
図、（ｂ）は（ａ）のＡ−Ａ矢視図である。
【図３】上記一実施例に係る作用説明図で、（ａ）は下
流側の超音波センサが超音波を発射している状態の説明
図、（ｂ）は（ａ）のＢ−Ｂ矢視図である。
【図４】従来の気泡映像化装置の説明図である。
【図５】上記従来の装置の作用説明図で、（ａ）は１個
の超音波センサより超音波を発射している状態の説明
図、（ｂ）は（ａ）のＣ−Ｃ矢視図である。
【符号の説明】
１，２ 超音波センサ
３，４ リード線
５，６ 超音波送受切替装置
７，８ 超音波送受信器
９ 映像合成処理装置
１０ 表示装置
１１ 配管
１２ 気泡BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A and 1B are explanatory diagrams of one embodiment of the present invention, in which FIG. 1A is an explanatory diagram of an ultrasonic sensor disposed in a pipe, and FIG. 1B is connected to the ultrasonic sensor. It is explanatory drawing of an apparatus. FIGS. 2A and 2B are explanatory diagrams of the operation according to the embodiment, wherein FIG. 2A is a diagram illustrating a state where an ultrasonic sensor on the upstream side emits ultrasonic waves, and FIG. 2B is an AA arrow of FIG. FIG. FIGS. 3A and 3B are operation explanatory diagrams according to the embodiment, in which FIG. 3A is a diagram illustrating a state in which a downstream ultrasonic sensor emits ultrasonic waves, and FIG. 3B is a BB arrow in FIG. FIG. FIG. 4 is an explanatory diagram of a conventional bubble imaging device. 5A and 5B are explanatory diagrams of the operation of the above-described conventional device, in which FIG. 5A is a diagram illustrating a state in which one ultrasonic sensor emits ultrasonic waves, and FIG. 5B is a diagram viewed in the direction of arrows CC in FIG. FIG. [Description of Signs] 1, 2 Ultrasonic Sensor 3, 4 Lead Wire 5, 6 Ultrasonic Transmission / Reception Switching Device 7, 8 Ultrasonic Transceiver 9 Image Synthesis Processing Device 10 Display Device 11 Piping 12 Bubble
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01S 15/89 G01N 29/10 507 G21C 17/038 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G01S 15/89 G01N 29/10 507 G21C 17/038
Claims (1)
れた複数個の第１の超音波センサ、同第１の超音波セン
サとの間に配管の軸方向に一定間隔を有して配管の外表
面の円周方向に１列に配設された複数個の第２の超音波
センサ、同第１と第２の超音波センサがそれぞれ第１と
第２の超音波送受切替装置を介して接続された第１と第
２の超音波送受信器、および同第１と第２の超音波送受
信器に接続され表示装置が設けられた映像合成処理装置
を備え、前記第１、第２の超音波センサは斜角型の超音
波センサであり、前記第１、第２の超音波送受切替装置
は前記第１、第２の超音波センサのうち１個を送信とし
て他は受信とし、同送信とするものを順々に切替えるこ
とを特徴とする気泡映像化装置。(57) [Claim 1] Between a plurality of first ultrasonic sensors arranged in a row in a circumferential direction on the outer surface of the pipe, and the first ultrasonic sensor A plurality of second ultrasonic sensors, and the first and second ultrasonic sensors, which are arranged in a row in a circumferential direction on the outer surface of the pipe with a constant interval in the axial direction of the pipe, respectively. First and second ultrasonic transceivers connected via first and second ultrasonic transmission / reception switching devices, and an image connected to the first and second ultrasonic transceivers and provided with a display device A synthesizing device , wherein the first and second ultrasonic sensors are oblique ultrasonic
A wave sensor, wherein the first and second ultrasonic transmission / reception switching devices are provided.
Is to transmit one of the first and second ultrasonic sensors.
A bubble imaging apparatus characterized in that the others are received and the transmissions are sequentially switched .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02243594A JP3402726B2 (en) | 1994-02-21 | 1994-02-21 | Bubble imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02243594A JP3402726B2 (en) | 1994-02-21 | 1994-02-21 | Bubble imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07229964A JPH07229964A (en) | 1995-08-29 |
| JP3402726B2 true JP3402726B2 (en) | 2003-05-06 |
Family
ID=12082623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02243594A Expired - Lifetime JP3402726B2 (en) | 1994-02-21 | 1994-02-21 | Bubble imaging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3402726B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7328624B2 (en) | 2002-01-23 | 2008-02-12 | Cidra Corporation | Probe for measuring parameters of a flowing fluid and/or multiphase mixture |
| US7426852B1 (en) * | 2004-04-26 | 2008-09-23 | Expro Meters, Inc. | Submersible meter for measuring a parameter of gas hold-up of a fluid |
| JP7020869B2 (en) * | 2017-11-10 | 2022-02-16 | マルヤス工業株式会社 | Bubble detection device and bubble detection method |
| KR101967709B1 (en) * | 2018-10-31 | 2019-08-13 | 한국지질자원연구원 | Ultrasonic-based solid deposition in flowline visualization apparatus and system thereof |
-
1994
- 1994-02-21 JP JP02243594A patent/JP3402726B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07229964A (en) | 1995-08-29 |
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