JPS6331727B2 - - Google Patents
Info
- Publication number
- JPS6331727B2 JPS6331727B2 JP57216935A JP21693582A JPS6331727B2 JP S6331727 B2 JPS6331727 B2 JP S6331727B2 JP 57216935 A JP57216935 A JP 57216935A JP 21693582 A JP21693582 A JP 21693582A JP S6331727 B2 JPS6331727 B2 JP S6331727B2
- Authority
- JP
- Japan
- Prior art keywords
- vortex
- emitting element
- light emitting
- attached
- pickup
- 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
Links
- 238000001514 detection method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明はカルマン渦発生周波数が流速に比例す
ることを利用した渦流量計における渦を光学的に
検出する検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection device for optically detecting a vortex in a vortex flow meter, which utilizes the fact that the Karman vortex generation frequency is proportional to the flow velocity.
従来、渦流量計に於ける渦検出装置はカルマン
渦発生に基づく物理量の変化を検出するものであ
るが、これらの物理量の変化は殆ど電気信号に変
換されて遠隔伝送されている。この為伝送線は少
なくとも２本を必要とする。また、光学的な検出
手段は電気信号伝送に於ける電気雑音の影響を受
けないＳ／Ｎ比の高い信号伝来を可能とする為優
れた手段であり、従来、光フアイバに作用する渦
力によるマイクロベンデイング損失、光学的誘電
体の旋光性、光路長変化による干渉縞の変化及び
渦検出要素の変化に基づく反射光量の変化などが
公知となつている。しかし、これらは光源を外部
に依存している為高価なバンドル型フアイバーケ
ーブルを必要としたり、分波量を必要とするなど
伝送費用が嵩むと云う問題点がある。 Conventionally, vortex detection devices in vortex flowmeters detect changes in physical quantities based on the generation of Karman vortices, but most of these changes in physical quantities are converted into electrical signals and transmitted remotely. Therefore, at least two transmission lines are required. In addition, optical detection means is an excellent means because it enables signal transmission with a high S/N ratio that is not affected by electrical noise during electrical signal transmission. Microbending loss, optical rotation of an optical dielectric, a change in interference fringes due to a change in optical path length, and a change in the amount of reflected light due to a change in a vortex detection element are well known. However, since these methods rely on an external light source, they require expensive bundled fiber cables and require a large amount of demultiplexing, which increases transmission costs.
本発明は叙上の観点にたつてなされたものであ
り、その目的とするところは、光による渦信号発
生源を渦発生体に内蔵させることにより光フアイ
バー単線で信号伝送する最も単純化された渦流量
計用ピツクアツプを提供しようとするものであ
る。 The present invention has been made based on the above-mentioned viewpoints, and its purpose is to provide the simplest method for signal transmission using a single optical fiber by incorporating an optical vortex signal generation source into a vortex generator. The present invention attempts to provide a pickup for a vortex flowmeter.
而して、その要旨とするところは、流体の流路
を形成する管路内に設けられた渦発生体の振動を
検出する為、その内部に収容される渦流量計用ピ
ツクアツプに於て、２枚の圧電素子の間に、上記
渦発生体の振動時に上記両圧電素子間に発生する
電圧によつて発光する発光素子を接合し、上記発
光素子の一端面に集光器を取り付けると共に、上
記発光素子の上記接合面以外の端面に上記集光器
を取り付けた部分を除き反射鏡を取り付けること
にある。 The gist of this is that, in order to detect vibrations of a vortex generator installed in a pipe conduit forming a fluid flow path, a vortex flowmeter pickup housed inside the vortex generator, A light emitting element that emits light by a voltage generated between the two piezoelectric elements when the vortex generating body vibrates is bonded between the two piezoelectric elements, and a light condenser is attached to one end surface of the light emitting element, A reflecting mirror is attached to an end surface of the light emitting element other than the bonding surface except for the portion where the condenser is attached.
以下、図面により本発明の詳細を具体的に説明
する。 Hereinafter, the details of the present invention will be specifically explained with reference to the drawings.
第１図は、本発明にかかる渦流量計用ピツクア
ツプが内部に収容される渦発生体の一実施例を示
す説明図、第２図は、本発明にかかる渦流量計用
ピツクアツプが納められる渦発生体の破断説明
図、第３図は、本発明にかかる渦流量計用ピツク
アツプの斜視図、第４図は、渦流量計用ピツクア
ツプの他の実施例を示す斜視図である。 FIG. 1 is an explanatory diagram showing an embodiment of a vortex generator in which a pick-up for a vortex flow meter according to the present invention is housed, and FIG. FIG. 3 is a perspective view of a pickup for a vortex flowmeter according to the present invention, and FIG. 4 is a perspective view showing another embodiment of the pickup for a vortex flowmeter.
第１図、第２図、第３図および第４図中、１は
その内部に軸直角断面が円形の流路を有するパイ
プ、２は上記パイプ１内に設置された渦発生体、
３は上記渦発生体２より発生したカルマン渦、
５，６は圧電素子、４は上記渦発生体２の内部に
圧電素子５，６を絶縁固着する絶縁物で不透明で
あることが望ましい。７は発光素子、８は反射
鏡、９はコニカルレンズ、１０はオプチカルフア
イバーである。 In FIGS. 1, 2, 3, and 4, 1 is a pipe having a flow passage whose cross section perpendicular to the axis is circular; 2 is a vortex generator installed in the pipe 1;
3 is a Karman vortex generated from the vortex generator 2,
5 and 6 are piezoelectric elements, and 4 is an insulator for insulating and fixing the piezoelectric elements 5 and 6 inside the vortex generator 2, and is preferably opaque. 7 is a light emitting element, 8 is a reflecting mirror, 9 is a conical lens, and 10 is an optical fiber.
而して、流体の流れによつて、パイプ１内に設
置された渦発生体２の左右にはカルマン渦３が発
生し、これにより、渦発生体２の上流側から流入
した液体は上記渦発生体２の下流側に流出する
が、上記カルマン渦３の発生、分離により渦発生
体２の下流側の管軸および上記渦発生体２に直角
な方向の速度成分はその向きを交互に変化するこ
とになる。 Due to the flow of the fluid, Karman vortices 3 are generated on the left and right sides of the vortex generator 2 installed in the pipe 1, so that the liquid flowing from the upstream side of the vortex generator 2 flows into the vortex. It flows out to the downstream side of the generator 2, but due to the generation and separation of the Karman vortex 3, the velocity components in the direction perpendicular to the tube axis on the downstream side of the vortex generator 2 and the vortex generator 2 alternately change their directions. I will do it.
渦発生体２の内部には２枚の圧電素子５，６の
間に、上記渦発生体２の振動時に両圧電素子５，
６間に電圧が発生することによつて発光する発光
素子７が接合され、また、上記発光素子７の上記
接合面以外の端面には反射鏡８が取り付けられる
と共に、上記反射鏡８が取り付けた端面と対面す
る端面にはコニカルレンズ９が設けられることに
より構成された渦流量計用ピツクアツプが納めら
れている。 Inside the vortex generator 2, between two piezoelectric elements 5 and 6, when the vortex generator 2 vibrates, both piezoelectric elements 5,
A light emitting element 7 that emits light when a voltage is generated between them is bonded to the light emitting element 7, and a reflecting mirror 8 is attached to an end surface of the light emitting element 7 other than the bonding surface. A pickup for a vortex flow meter is housed in an end face facing the end face, which is configured by providing a conical lens 9.
なお、反射鏡８の取り付け位置は、上述の如
く、上記発光素子７の接合面以外の端面に限定さ
れることなく、第４図に示す如く、上記発光素子
７の端面上からこれに隣接する両圧電素子５，６
の端面上まで延びて取り付けるようにしてもよ
い。 As mentioned above, the mounting position of the reflecting mirror 8 is not limited to the end surface of the light emitting element 7 other than the bonding surface, but as shown in FIG. Both piezoelectric elements 5, 6
It may be attached so that it extends to the top of the end surface.
また、上記発光素子７の接合面の端面に反射鏡
８を取り付けず、上記反射鏡８に替えてコニカル
レンズ９を取り付けた部分を除き透明物質で絶縁
処理した後を全体に総てメツキ加工を施しても同
様の効果が得られるものである。 In addition, the reflective mirror 8 is not attached to the end face of the bonded surface of the light emitting element 7, and the entire surface is plated after being insulated with a transparent material except for the part where the conical lens 9 is attached in place of the reflective mirror 8. The same effect can be obtained even if it is applied.
而して、カルマン渦３の発生に伴い渦発生体２
の内部に収容された上記渦流量計用ピツクアツプ
の圧電素子５，６はカルマン渦３の発生を電圧の
変化に変換することになる。 Therefore, with the generation of the Karman vortex 3, the vortex generator 2
The piezoelectric elements 5 and 6 of the vortex flow meter pickup housed inside convert the generation of the Karman vortex 3 into a change in voltage.
両側面が２枚の圧電素子５，６で被われた発光
素子７には、上記２枚の圧電素子５，６の間に発
生した電圧が印加され、これによつて上記発光素
子７は発光することになる。この発光素子７に生
じた光は反射鏡８によつてコニカルレンズ９に反
射されると共に、集光され、上記コニカルレンズ
９からオプチカルフアイバー１０を介して光の変
化として取り出されるのである。 A voltage generated between the two piezoelectric elements 5 and 6 is applied to the light emitting element 7 whose both sides are covered with the two piezoelectric elements 5 and 6, whereby the light emitting element 7 emits light. I will do it. The light generated in the light emitting element 7 is reflected by the reflecting mirror 8 onto the conical lens 9, is condensed, and is extracted from the conical lens 9 via the optical fiber 10 as a change in light.
特に、本発明にかかる渦流量計用ピツクアツプ
は、従来のストレインゲージ歪計を使用するのと
異なり、帯電部分が少ないので絶縁が容易である
と共に、流量の変化を光の変化として取り出すの
で電磁的な外乱を受けることなく流量を正確に検
出することができるのである。 In particular, the pickup for a vortex flow meter according to the present invention, unlike the conventional strain gauge strain meter, has fewer electrically charged parts, making it easy to insulate, and since it extracts changes in flow rate as changes in light, it is electromagnetic. This allows the flow rate to be detected accurately without any disturbance.
本発明は叙上の如く構成されるので、本発明に
かかる渦流量計用ピツクアツプによる時には、渦
発生体の内部に納める渦流量計用ピツクアツプの
検出素子の絶縁を完全、且つ、容易に行うことが
できると共に、最も単純化された渦流量計用ピツ
クアツプを提供することができるのである。 Since the present invention is constructed as described above, when the pickup for a vortex flowmeter according to the present invention is used, it is possible to completely and easily insulate the detection element of the pickup for a vortex flowmeter housed inside the vortex generator. At the same time, it is possible to provide the simplest pickup for a vortex flow meter.
なお、本発明は叙上の実施例に限定されるもの
ではない。即ち、例えば、本実施例に於ては発光
素子に生じた光を反射鏡によつて反射させ、これ
をコニカルレンズによつて取り出すように構成し
たが、同様な作用を果すものであれば他の公知の
反射鏡および集光器も使用できるものであり、ま
た、渦流量計用ピツクアツプ全体の形状および大
きさも渦発生体の形状および大きさ等に応じて自
由に設計変更できるものであり、本発明はそれら
の総てを包摂するものである。 Note that the present invention is not limited to the embodiments described above. That is, for example, in this embodiment, the light generated in the light emitting element is reflected by a reflecting mirror and then extracted by a conical lens, but other devices may be used as long as they achieve the same effect. The well-known reflector and condenser can also be used, and the overall shape and size of the vortex flowmeter pick-up can be freely changed according to the shape and size of the vortex generator. The present invention encompasses all of them.
第１図は、本発明にかかる渦流量計用ピツクア
ツプが内部に収容される渦発生体の一実施例を示
す説明図、第２図は、本発明にかかる渦流量計用
ピツクアツプが納められる渦発生体の破断説明
図、第３図は、本発明にかかる渦流量計用ピツク
アツプの斜視図、第４図は、渦流量計用ピツクア
ツプの他の実施例を示す斜視図である。
１……パイプ、２……渦発生体、３……カルマ
ン渦、４……絶縁物、５，６……圧電素子、７…
…発光素子、８……反射鏡、９……コニカルレン
ズ、１０……オプチカルフアイバー。
FIG. 1 is an explanatory diagram showing an embodiment of a vortex generator in which a pick-up for a vortex flow meter according to the present invention is housed, and FIG. FIG. 3 is a perspective view of a pickup for a vortex flowmeter according to the present invention, and FIG. 4 is a perspective view showing another embodiment of the pickup for a vortex flowmeter. 1... Pipe, 2... Vortex generator, 3... Karman vortex, 4... Insulator, 5, 6... Piezoelectric element, 7...
...Light emitting element, 8...Reflector, 9...Conical lens, 10...Optical fiber.
Claims (1)
の振動を検出する為、その内部に収容される渦流
量計用ピツクアツプに於て、 ２枚の圧電素子の間に、上記渦発生体の振動時
に両圧電素子間に発生する電圧によつて発光する
発光素子を接合し、上記発光素子の一端面に集光
器を取り付けると共に、上記発光素子の上記接合
面以外の端面に上記集光器を取り付けた部分を除
き反射鏡を取り付けたことを特徴とする上記の渦
流量計用ピツクアツプ。 ２ 上記集光器がコニカルレンズである特許請求
の範囲第１項記載の渦流量計用ピツクアツプ。[Claims] 1. In order to detect vibrations of a vortex generator installed in a pipe conduit forming a flow path, in a pickup for a vortex flowmeter housed inside the vortex generator, two piezoelectric elements are used. A light emitting element that emits light by a voltage generated between both piezoelectric elements when the vortex generator vibrates is bonded between them, a light concentrator is attached to one end surface of the light emitting element, and a light concentrator is attached to one end surface of the light emitting element, and the bonding surface of the light emitting element is The pick-up for a vortex flow meter as described above, characterized in that a reflecting mirror is attached to the other end face except for the part where the condenser is attached. 2. A pickup for a vortex flow meter according to claim 1, wherein the condenser is a conical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216935A JPS59107209A (en) | 1982-12-13 | 1982-12-13 | Pickup for vortex street flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216935A JPS59107209A (en) | 1982-12-13 | 1982-12-13 | Pickup for vortex street flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59107209A JPS59107209A (en) | 1984-06-21 |
| JPS6331727B2 true JPS6331727B2 (en) | 1988-06-27 |
Family
ID=16696228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57216935A Granted JPS59107209A (en) | 1982-12-13 | 1982-12-13 | Pickup for vortex street flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59107209A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1230157B (en) * | 1989-06-16 | 1991-10-14 | Lisapharma Spa | USE OF WET SUCRALPHATE FOR THE TREATMENT OF DERMA ULCERS AND AS A VEHICLE OF DRUGS WITH TOPICAL ACTIVITY |
-
1982
- 1982-12-13 JP JP57216935A patent/JPS59107209A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59107209A (en) | 1984-06-21 |
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