JPH02223822A - Method and instrument for measuring flow velocity or flow rate - Google Patents
Method and instrument for measuring flow velocity or flow rateInfo
- Publication number
- JPH02223822A JPH02223822A JP4378089A JP4378089A JPH02223822A JP H02223822 A JPH02223822 A JP H02223822A JP 4378089 A JP4378089 A JP 4378089A JP 4378089 A JP4378089 A JP 4378089A JP H02223822 A JPH02223822 A JP H02223822A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fluid
- flow rate
- strain gauge
- flow
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 4
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、空気や水等の流体の速度または流量を測定す
る測定方法及び装置°に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a measuring method and apparatus for measuring the velocity or flow rate of a fluid such as air or water.
上水道を流れる水の流速を測定するには、従来、管路に
オリフィスを設けるとともに、該オリフィスの上流側と
下流側に圧力センサを設け、二つの圧力センサの差圧か
ら、
Ｖ” ９ ｐ ＋−ｐ １ γを
計算して測定している。Conventionally, in order to measure the flow rate of water flowing through a water supply, an orifice is provided in the pipe, and pressure sensors are provided on the upstream and downstream sides of the orifice, and from the differential pressure between the two pressure sensors, V" 9 p + −p 1 γ is calculated and measured.
但し、Ｖは流速、９は重力の加速度、ｐ＋、ｐｔは圧カ
センザで計測されたオリフィス上流側圧力と下流側圧力
、γは流体の密度である。なお、流量は管路の横断面積
に流速Ｖを乗じて得られることは言うまでもない。However, V is the flow velocity, 9 is the acceleration of gravity, p+ and pt are the orifice upstream pressure and downstream pressure measured by a pressure sensor, and γ is the density of the fluid. It goes without saying that the flow rate can be obtained by multiplying the cross-sectional area of the pipe by the flow velocity V.
ところが、従来の測定方法は、これを実行に移す測定装
置の構造が複雑でコストが高いとともに、設置に手間が
かかり、管路の必要な箇所の流速または流量を随時簡便
に測定することができないという問題点がある。However, with conventional measurement methods, the structure of the measuring device used to carry out the measurement is complex and costly, and installation is time-consuming, making it impossible to easily measure the flow velocity or flow rate at the required point in the pipe. There is a problem.
本発明は、装置を簡略化することができる流速または流
量の測定方法、及び構造が簡単で設置に手間がかからず
、必要な箇所の流速または流量を簡単に測定することが
できる測定装置を提供することを目的とする。The present invention provides a flow rate or flow rate measuring method that can simplify the device, and a measuring device that has a simple structure, requires no effort to install, and can easily measure the flow rate or flow rate at a required location. The purpose is to provide.
上記の目的を達成するために、第１発明は、歪みゲージ
を介して固定部材に取り付けられた受圧部材を流体流路
に挿入し、流体流路を流れる流体の圧力を受圧部材で受
けることによって歪みゲージに加えられた流体圧力から
流体の流速または流量を測定する構成としたものである
。In order to achieve the above object, the first invention inserts a pressure receiving member attached to a fixed member through a strain gauge into a fluid flow path, and receives the pressure of the fluid flowing through the fluid flow path with the pressure receiving member. The structure is such that the flow rate or flow rate of the fluid is measured from the fluid pressure applied to the strain gauge.
また第２発明は、流体流路に挿入されて流体の圧力を受
ける受圧部材を歪みゲージを介して固定部材に取り付け
、上記歪みゲージに測定表示器を接続した構成としたも
のである。In a second aspect of the invention, a pressure receiving member inserted into a fluid flow path and receiving fluid pressure is attached to a fixed member via a strain gauge, and a measurement display is connected to the strain gauge.
流体流路を流れる流体内に受圧部材を差し込んで固定部
材を所定位置に固定する。この設置状態において受圧部
材は流体の流れにしたがって下流側に押圧され、歪みゲ
ージを変形させる。歪みゲージは変形の度合いに応じた
電気信号を測定表示器に出力し、これを受けた測定表示
器は歪みゲージの出力を流体の流速または流量として表
示する。The fixing member is fixed in a predetermined position by inserting the pressure receiving member into the fluid flowing through the fluid flow path. In this installed state, the pressure receiving member is pressed downstream according to the flow of fluid, deforming the strain gauge. The strain gauge outputs an electric signal corresponding to the degree of deformation to the measurement display, and the measurement display that receives the electrical signal displays the output of the strain gauge as the flow rate or flow rate of the fluid.
この測定方法は、流体の圧力を受圧部材に受けて歪みゲ
ージを変形させ、その変形量から流速または流量を測定
するものであるから、装置の構造が簡単であり、コスト
安であるととらに、設置に手間を要しない。This measurement method deforms the strain gauge by receiving the pressure of the fluid in the pressure receiving member, and measures the flow velocity or flow rate from the amount of deformation, so the device has a simple structure and is low cost. , does not require any effort to install.
第１図と第２図は本発明に係る流速または流量測定装置
の一実施例を示すもので、図中符号１は流体が流れる流
路（管路）である。この流路１の上部には、口２が流路
１から分岐して設けられ、この口２のフランジ３ζこは
、蓋４がボルト等の固定手段（図示せず）によって着脱
自在に取り付けられている。FIGS. 1 and 2 show an embodiment of a flow velocity or flow rate measuring device according to the present invention, and reference numeral 1 in the figures indicates a flow path (pipe line) through which a fluid flows. A port 2 is provided in the upper part of the flow path 1, branching from the flow path 1, and a flange 3ζ of this port 2 has a lid 4 removably attached to it by fixing means (not shown) such as bolts. ing.
また符号５は、本発明に係る流速または流量の測定装置
であって、円形の受圧部６ ａ Ｌ細いＦｉ６ｂが取り
付けられた受圧部１／１６を歪みゲージ（または応力ゲ
ージ、以下歪みゲージと総称する）７を介して固定部材
８に取り付け、該固定部Ｉｔ８に測定表示器９を取り付
けるとともに、上記歪みゲージ７に測定表示器９をリー
ド線１０で接続してなる。測定装ｆｉ１５は、蓋４に明
けられた孔４ａに固定部材８を気（液）密約に挿通させ
、受圧部６ａを流体の、流れ方向に向けて受圧部材６を
流路１の内部に挿、大して設置される。Reference numeral 5 denotes a flow rate or flow rate measuring device according to the present invention, in which a circular pressure receiving part 6 a and a pressure receiving part 1/16 to which a L thin Fi 6b is attached are used as strain gauges (or stress gauges, hereinafter collectively referred to as strain gauges). It is attached to the fixing member 8 via the fixing part It8, and the measurement indicator 9 is attached to the fixing part It8, and the measurement indicator 9 is connected to the strain gauge 7 with a lead wire 10. The measuring device fi15 is configured by inserting the fixing member 8 into the hole 4a formed in the lid 4 in an air (liquid) tight manner, and inserting the pressure receiving member 6 into the flow path 1 with the pressure receiving part 6a facing the flow direction of the fluid. , will be installed to a great extent.
測定装置５の上記設置状態においては、流路Ｉを流れる
流体は、その流速にしたがって受圧部材６の受圧部６ａ
を押圧する。この押圧力（荷重）Ｆと流速Ｖの関係は、
次式（１）によって表され、また、歪みゲージ７に加わ
る曲げモーメントＭは次式（２）によって表される。In the above-mentioned installed state of the measuring device 5, the fluid flowing through the flow path I flows through the pressure receiving portion 6a of the pressure receiving member 6 according to its flow velocity.
Press. The relationship between this pressing force (load) F and flow velocity V is
It is expressed by the following equation (1), and the bending moment M applied to the strain gauge 7 is expressed by the following equation (2).
Ｆ＝７υＪ ・・・・・・・・・ （１）Ｍ＝Ｆ−５
・・・・・・・・・ （２）但しζＡは流れに垂直な
受圧部６ａの面積、ｅは受圧部６ａの中心から歪みゲー
ジ７までの距離である。F=7υJ ・・・・・・・・・ (1) M=F−5
(2) However, ζA is the area of the pressure receiving part 6a perpendicular to the flow, and e is the distance from the center of the pressure receiving part 6a to the strain gauge 7.
上記歪みゲージ７は受圧部６ａに加えられた流体圧力に
したがって歪み（または応力）を発生し、流体圧力の大
小に応じた電気信号を測定表示器９に出力する。測定表
示器９は、歪みゲージ７から出力された電気信号を受け
てこれを流速または流ｍとして表示する。The strain gauge 7 generates strain (or stress) according to the fluid pressure applied to the pressure receiving part 6a, and outputs an electric signal to the measurement display 9 according to the magnitude of the fluid pressure. The measurement display 9 receives the electrical signal output from the strain gauge 7 and displays it as a flow velocity or flow m.
なお、図には流路１として管路（閉水路）が示されてい
るが、開水路でも実施可能である。Although a pipe (closed waterway) is shown as the flow path 1 in the figure, it is also possible to use an open waterway.
以上説明したように、第１発明は、歪みゲージを介して
固定部材に取り付けられた受圧部材を流体流路に挿入し
、流体流路を流れる流体の圧力を受圧部材で受けること
によって歪みゲージに加えられた流体圧力から流体の流
速または流量を測定する構成とされているので、測定装
置の構造を簡略化することが容易であり、また至極簡単
に流速または流量を測定することができる。As explained above, the first invention inserts the pressure-receiving member attached to the fixed member through the strain gauge into the fluid flow path, and allows the pressure-receiving member to receive the pressure of the fluid flowing through the fluid flow path. Since the configuration is such that the flow rate or flow rate of the fluid is measured from the applied fluid pressure, the structure of the measuring device can be easily simplified, and the flow rate or flow rate can be measured extremely easily.
また第２発明は、流体流路に挿入されて流体の圧力を受
ける受圧部材が歪みゲージを介して固定部材に取り付け
られ、上記歪みゲージ１こは測定表示器が接続された構
成とされているので、構造が険単で設置に手間かかから
ず、必要な箇所の流速または流量を簡単に測定すること
ができる。Further, in a second invention, a pressure receiving member inserted into a fluid flow path and receiving fluid pressure is attached to a fixed member via a strain gauge, and a measurement display is connected to the strain gauge 1. Therefore, the structure is simple and requires no effort to install, and the flow velocity or flow rate at the required location can be easily measured.
第１図は本発明に係る流速または流量の測定装置の設備
状態を示す横断面図、第２図は縦断面図である。
１・・・流路（管路）、６・・・受圧部材、６ａ・・・
受圧部、６ｂ・・・柄、７・・・歪みゲージ、８・・・
固定部材、９測定表示器。FIG. 1 is a cross-sectional view showing the installation state of a flow rate or flow rate measuring device according to the present invention, and FIG. 2 is a vertical cross-sectional view. 1... Flow path (pipe line), 6... Pressure receiving member, 6a...
Pressure receiving part, 6b...handle, 7...strain gauge, 8...
Fixed member, 9 measurement display.
Claims (1)
部材を流体流路に挿入し、流体流路を流れる流体の圧力
を受圧部材で受けることによって歪みゲージに加えられ
た流体圧力から流体の流速または流量を測定することを
特徴とする流速または流量の測定方法。 ２、流体流路に挿入されて流体の圧力を受ける受圧部材
が歪みゲージを介して固定部材に取り付けられ、上記歪
みゲージには測定表示器が接続されたことを特徴とする
流速または流量の測定装置。[Claims] 1. The pressure receiving member attached to the fixed member via the strain gauge is inserted into the fluid flow path, and the pressure of the fluid flowing through the fluid flow path is received by the pressure receiving member, thereby applying the pressure to the strain gauge. A method for measuring flow rate or flow rate, characterized by measuring the flow rate or flow rate of a fluid from fluid pressure. 2. Measurement of flow velocity or flow rate, characterized in that a pressure receiving member inserted into a fluid flow path and receiving fluid pressure is attached to a fixed member via a strain gauge, and a measurement display is connected to the strain gauge. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4378089A JPH02223822A (en) | 1989-02-23 | 1989-02-23 | Method and instrument for measuring flow velocity or flow rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4378089A JPH02223822A (en) | 1989-02-23 | 1989-02-23 | Method and instrument for measuring flow velocity or flow rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02223822A true JPH02223822A (en) | 1990-09-06 |
Family
ID=12673271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4378089A Pending JPH02223822A (en) | 1989-02-23 | 1989-02-23 | Method and instrument for measuring flow velocity or flow rate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02223822A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004522487A (en) * | 2000-12-22 | 2004-07-29 | レスメッド・リミテッド | Rectifying vent |
| KR20160150047A (en) * | 2015-06-19 | 2016-12-28 | 도쿄엘렉트론가부시키가이샤 | Flow rate measuring device and processing apparatus |
| US10323186B2 (en) | 2014-12-25 | 2019-06-18 | Dic Corporation | Nematic liquid crystal composition and liquid crystal display element using the same |
| JP2021080669A (en) * | 2019-11-15 | 2021-05-27 | 清水建設株式会社 | Rain-water control system |
-
1989
- 1989-02-23 JP JP4378089A patent/JPH02223822A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004522487A (en) * | 2000-12-22 | 2004-07-29 | レスメッド・リミテッド | Rectifying vent |
| JP2008264566A (en) * | 2000-12-22 | 2008-11-06 | Resmed Ltd | Flow regulation vent |
| US8439035B2 (en) | 2000-12-22 | 2013-05-14 | Resmed Limited | Flow regulation vent |
| US9278186B2 (en) | 2000-12-22 | 2016-03-08 | Resmed Limited | Flow regulation vent |
| US9808594B2 (en) | 2000-12-22 | 2017-11-07 | Resmed Limited | Flow regulation vent |
| US10220179B2 (en) | 2000-12-22 | 2019-03-05 | Resmed Limited | Flow regulation vent |
| US10323186B2 (en) | 2014-12-25 | 2019-06-18 | Dic Corporation | Nematic liquid crystal composition and liquid crystal display element using the same |
| KR20160150047A (en) * | 2015-06-19 | 2016-12-28 | 도쿄엘렉트론가부시키가이샤 | Flow rate measuring device and processing apparatus |
| JP2017009380A (en) * | 2015-06-19 | 2017-01-12 | 東京エレクトロン株式会社 | Flow rate measuring device and processor |
| TWI647428B (en) * | 2015-06-19 | 2019-01-11 | 日商東京威力科創股份有限公司 | Flow measuring device and processing device |
| JP2021080669A (en) * | 2019-11-15 | 2021-05-27 | 清水建設株式会社 | Rain-water control system |
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