JPS58156815A - Measuring device for flow rate - Google Patents
Measuring device for flow rateInfo
- Publication number
- JPS58156815A JPS58156815A JP4121582A JP4121582A JPS58156815A JP S58156815 A JPS58156815 A JP S58156815A JP 4121582 A JP4121582 A JP 4121582A JP 4121582 A JP4121582 A JP 4121582A JP S58156815 A JPS58156815 A JP S58156815A
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- storage container
- flow rate
- inflow
- signal
- 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
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
- G01F1/007—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 measuring the level variations of storage tanks relative to the time
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は流量測定装置に関し、例えば液体分離装置の特
性試験等における小流量測定に適するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow rate measuring device, and is suitable for measuring small flow rates in, for example, characteristic tests of liquid separation devices.
流量を電気信号により自動測定する従来の装置は高価格
であり、また測定時には流体入口と流体出口との間で多
少の圧力差か生ずる為、流体が自然落下する状態のよう
な微小流量測定には不向きであった。Conventional devices that automatically measure the flow rate using electrical signals are expensive, and because a slight pressure difference occurs between the fluid inlet and the fluid outlet during measurement, it is difficult to measure minute flow rates such as those in which the fluid naturally falls. was not suitable.
そこで本発明者らは、上部に流入口を設けた貯蔵部とそ
の貯蔵部の底部と連通し所定高さにおいて下方に開口し
たサイホン管からなるサイホン容器に、自然落下状態の
流体を流入口から流入制御弁によって適宜流入させ、所
定量の流体が貯蔵された後、サイホン管出口から流体が
流出し始めると、その流出を検出する手段によってこれ
を検出して流体の流入を停止し、流体の流出が完了する
と同時に、再び流入口から流体を流入させ、再度上述の
一連の動作をくり返し、上記の流体流出検出手段出力を
導入して検出から検出までの時間を計測することによっ
て、サイホン容器の既知の貯蔵容量を用いて流体流量を
算出する装置を既に提案している。このサイホン管を用
いた流量測定装置によって、自然落下状態のような微小
流量を従来の装置に比してより正確に測定することかで
き、しかも安価に製造することかできるようになった。Therefore, the present inventors have constructed a siphon container consisting of a storage section with an inflow port at the top and a siphon tube that communicates with the bottom of the storage section and opens downward at a predetermined height. When fluid starts to flow out from the siphon pipe outlet after a predetermined amount of fluid has been stored in the inflow control valve, the outflow detection means detects this and stops the fluid inflow. At the same time as the outflow is completed, the fluid is allowed to flow in from the inflow port again, the above-mentioned series of operations are repeated, and the output of the above-mentioned fluid outflow detection means is introduced to measure the time from detection to detection. Devices have already been proposed that use known storage volumes to calculate fluid flow rates. This flow rate measuring device using a siphon tube can measure minute flow rates, such as those caused by free fall, more accurately than conventional devices, and can be manufactured at a lower cost.
しかしながら、このサイホン管を用いた流１測定装置に
よっては、サイホイ管の流出口より流出する流体の検出
に際し２、サイホン管流出口先端に残留している液滴が
落下し、これを正規の流出信号と弁別する為に、コンピ
ュータ等を用いて制御する必要があり、この制御は複雑
なものであった。However, depending on the flow measurement device using this siphon tube, when detecting the fluid flowing out from the siphon tube outlet, droplets remaining at the tip of the siphon tube outlet may fall, and these droplets may be removed from the regular flow. In order to distinguish it from the signal, it was necessary to control it using a computer or the like, and this control was complicated.
本発明は上記に鑑みなされたものであって、より簡単な
構造でしかも正確な測定のできる微小流量の測定に適し
た流１測定装置の膀供を目的とする。The present invention has been made in view of the above, and an object of the present invention is to provide a flow measuring device suitable for measuring minute flow rates, which has a simpler structure and is capable of accurate measurement.
本発明の特徴は、上部に流入口、底部に流出口を設けた
貯蔵容器に、流入口からの流体流入を制御する流入制御
弁を介して流体を流入させ、貯蔵容器内の流体の液面レ
ベルが所定レベルに達したことを検出する手段と、流体
が貯蔵容器内に流入し始めてから所定レベルに達すまで
の時間を１測する手段とを設＋１．その時間と貯蔵容器
の所定し１ ベルまでの容積とから流体流量を
算出することにある。A feature of the present invention is that fluid is allowed to flow into a storage container having an inlet at the top and an outlet at the bottom via an inflow control valve that controls the inflow of fluid from the inlet, and the level of the fluid in the storage container is A means for detecting that the level has reached a predetermined level, and a means for measuring the time from when the fluid starts flowing into the storage container until it reaches the predetermined level are provided.+1. The purpose is to calculate the fluid flow rate from that time and the volume of the storage container up to a predetermined 1 bel.
以下、図面に従って本発明実施例を説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明実施例の構成図である。FIG. 1 is a block diagram of an embodiment of the present invention.
貯蔵容器１の上部に上方に突出して配設された流入口１
ａの上方には、流体の流路を切換える流入制御弁２が設
けられている。この流入制御弁２は三方向電磁弁であっ
て、流体の流路を流入口１ａから貯蔵容器１内に導くか
または、他の容器に導くかを制御信号に基づいて切換え
ることができる。An inlet 1 is provided at the upper part of the storage container 1 to protrude upward.
An inflow control valve 2 for switching the fluid flow path is provided above a. The inflow control valve 2 is a three-way solenoid valve, and can switch the flow path of the fluid from the inlet 1a into the storage container 1 or into another container based on a control signal.
貯蔵容器１の底部には流出口１ｂが配設され、流出制御
弁３が設けられている。この流出制御弁３は、二方向電
磁弁であって、流出口１ｂを制御信号に基づいて開閉す
ることができる。貯蔵容器１にはまた、その下部と連通
して上方に伸びる細管４が設けられ、その細管４内には
流体の液面変位に従って変位自在の浮子５を備え、また
細管４上部所定位置にはその浮子５と共同して液面レベ
ルを検出する光電センサ６が配設されている。この光電
センサ６の配設レベルは、貯蔵容器１上方に突出した流
入口１ａの存在するレベルである。光電センサ６の液面
検出信号りは制御部７に導入され、制御部７はその信号
りと、後述する予め入力された流出所要時間とに基づい
て、流入制御゛２および流出制御弁３に制御信号に１お
よびに２を供給する。また制御部７は、制御信号に＋、
に２を発１．７で流体か貯蔵容器１に流入を開始してか
ら所定の液面レベルに達して液面検出信号りが到来する
までの時間Ｉｌｌ ｉを計測して、 その値に対応した
信号を演算部８に供給する。演算部８は、その信号を導
入し、予め入力されている貯蔵容器１の所定の液面レベ
ルまでの容積Ｖを用いて、次式によって流量Ｑｉを算出
する。An outflow port 1b is provided at the bottom of the storage container 1, and an outflow control valve 3 is provided. The outflow control valve 3 is a two-way solenoid valve that can open and close the outflow port 1b based on a control signal. The storage container 1 is also provided with a thin tube 4 that communicates with the lower part of the container and extends upward, and the thin tube 4 is provided with a float 5 that can be freely displaced according to the liquid level displacement of the fluid. A photoelectric sensor 6 is provided that works with the float 5 to detect the liquid level. The photoelectric sensor 6 is installed at a level where the inlet port 1a protruding above the storage container 1 exists. The liquid level detection signal from the photoelectric sensor 6 is introduced into the control unit 7, and the control unit 7 controls the inflow control 2 and the outflow control valve 3 based on the signal and the required outflow time input in advance, which will be described later. Supply 1 and 2 to the control signals. Further, the control unit 7 inputs the control signal +,
Measure the time Ill i from when the fluid starts flowing into the storage container 1 until it reaches a predetermined liquid level and the liquid level detection signal arrives at step 1.7, and correspond to that value. The resulting signal is supplied to the calculation section 8. The calculation unit 8 inputs the signal and calculates the flow rate Qi using the following equation using the volume V of the storage container 1 up to a predetermined liquid level that has been input in advance.
Ｑｉ＝Ｖ／Ｔｉ
この演算部８はマイクロコンピュータによって構成する
ことかできる。また、この演算部８の出力はプリンタ９
に供給されて印字されるよう構成されている。Qi=V/Ti This arithmetic unit 8 can be constructed by a microcomputer. Also, the output of this calculation section 8 is output to a printer 9.
It is configured to be supplied to the printer and printed.
次に上述の実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
第２図は制御部７の制御信号Ｌｌ、 Ｋｎと光電セン
サ６の液面検出信号りに関する作用説明図である。FIG. 2 is an explanatory diagram of the operation of the control signals Ll and Kn of the control section 7 and the liquid level detection signal of the photoelectric sensor 6.
制御信号Ｋｌは流入制御弁２に対する制御信号であって
、状態“・１“が流体流路か貯蔵容器１に導かれる状態
を示す。制ａ信号に２は流出制御弁３に対する制御信号
で、状態“１“が閉の状態を示す。外部から計測指令を
与えると、制御信号に＋。The control signal Kl is a control signal for the inflow control valve 2, and the state ".1" indicates the state in which the fluid flow path or storage container 1 is guided. The control a signal 2 is a control signal for the outflow control valve 3, and the state "1" indicates a closed state. When a measurement command is given from the outside, the control signal is positive.
Ｋ２は状態″１“となって貯蔵容器１内に流体が流入を
開始し、同時に制御部７において計時が開始される。流
体が貯蔵容器１内で所定の液面レベルに達すると、光電
センサ６が浮子５を検知して液面検出信号りを出力して
制御部７に供給する。K2 becomes state "1" and fluid starts flowing into the storage container 1, and at the same time, time measurement is started in the control section 7. When the fluid reaches a predetermined level in the storage container 1, the photoelectric sensor 6 detects the float 5, outputs a level detection signal, and supplies it to the control unit 7.
制御部７はこの信号りを受けて、制御信号Ｌ１゜Ｋ２を
状態“Ｏ“にセットし、流入制御弁２は貯蔵容器１への
流体流入を停止するとともに流出制御弁３を開き貯蔵容
器１内の流体を流出する。同時に計時を終了して演算部
８にＴＩを供給する。In response to this signal, the control unit 7 sets the control signal L1°K2 to the state "O", and the inflow control valve 2 stops the fluid flowing into the storage container 1, and opens the outflow control valve 3 to open the storage container 1. Drain the fluid inside. At the same time, time measurement is ended and TI is supplied to the calculation section 8.
演算部８は上述の計算式によって流量Ｑｌを算出してプ
リンタ９に供給し、プリンタ９にてこの計算値Ｑｌを印
字する。制御部７には、貯蔵容器１から貯蔵された流体
が完全に流出してしまうに要する流出所要時間を予め計
測して、これに基づし１で所定の時間ＴＯが入力されて
おり、流出制御井３を開いてから時間゛１゛０経過後、
再ひ制御信号に１゜Ｋ２を状態“ｌ“とじて上述の動体
をくり返す。The calculation unit 8 calculates the flow rate Ql using the above-mentioned formula and supplies it to the printer 9, which prints out the calculated value Ql. A predetermined time TO is inputted to the control unit 7 at 1 based on the measured outflow time required for the fluid stored in the storage container 1 to completely flow out. After time ゛1゛0 has passed since control well 3 was opened,
The above-mentioned moving object is repeated by setting 1°K2 to the state "l" in the control signal again.
このようにして順次流蓋Ｑｉを求めプリンタ９によって
印字してゆく。In this way, the flow caps Qi are sequentially determined and printed by the printer 9.
上述の実施例において、液面レベルの検出手段として浮
子と光電素子を用いたが、他の公知のレベル検出装置で
あってもよい。In the above-described embodiment, a float and a photoelectric element are used as means for detecting the liquid level, but other known level detecting devices may be used.
以上説明したように、本発明によ・つては自然落下状態
のような微小流量を簡単な装置を用いて正確に測定する
ことかでき、実験によるとその測定誤差は１％以内であ
ることが判明した。しかも、この発明によっては、貯蔵
容器の容量を変更するだけで流量測定範囲を設定変更す
ることができ、取扱いが容易で安価な流１″測定装値を
得ることかできた。As explained above, according to the present invention, it is possible to accurately measure a minute flow rate, such as in a free fall state, using a simple device, and experiments have shown that the measurement error is within 1%. found. Furthermore, according to the present invention, the flow rate measurement range can be changed by simply changing the capacity of the storage container, and a flow 1'' measurement device that is easy to handle and inexpensive can be obtained.
第１図は本発明実施例の構成図、第２図はその制御部の
制御信号と液面検出信号に係る作用晩明図である。
１・・・貯蔵容器
２・・・流入制御弁
３・・・流出制御弁
４・・・細管
５・・・浮子
６・・・光電センサ
７・・・制御部
８・・・演算部
９・・・プリンタ
特許出願人 日東電気工業株式会社
代理人 弁理士 西 １） 新
築１図
第２図FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing the operation of the control signal and liquid level detection signal of the control section. 1... Storage container 2... Inflow control valve 3... Outflow control valve 4... Thin tube 5... Float 6... Photoelectric sensor 7... Control section 8... Calculation section 9. ...Printer patent applicant Nitto Electric Industry Co., Ltd. agent Patent attorney Nishi 1) New construction Figure 1 Figure 2
Claims (1)
流体の流路を切換えて上記貯蔵容器の流入口からの流体
流入を制御する流入制御弁と、上記貯蔵容器の流出口を
開閉する流出制御弁と、上記貯蔵容器内の流体の液面レ
ベルを検出する手段と、流体か上記貯蔵容器に流入し始
めてから所定の液面レベルに達するまでの時間を計測す
る計時手段とを備え、上記貯蔵容器の上記所定の液面レ
ベルまでの容積と上記時間とから流体の流量を求めるよ
う格成された流量測定装置。A storage container with an inlet at the top and an outlet at the bottom,
an inflow control valve that switches a fluid flow path to control fluid inflow from an inlet of the storage container; an outflow control valve that opens and closes an outlet of the storage container; and an outflow control valve that controls the liquid level of the fluid in the storage container. and a timing means for measuring the time from when the fluid starts flowing into the storage container until it reaches a predetermined liquid level, and the volume and the time until the fluid reaches the predetermined liquid level in the storage container. A flow rate measuring device configured to determine the flow rate of a fluid from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4121582A JPS58156815A (en) | 1982-03-15 | 1982-03-15 | Measuring device for flow rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4121582A JPS58156815A (en) | 1982-03-15 | 1982-03-15 | Measuring device for flow rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58156815A true JPS58156815A (en) | 1983-09-17 |
Family
ID=12602172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4121582A Pending JPS58156815A (en) | 1982-03-15 | 1982-03-15 | Measuring device for flow rate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58156815A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149521A2 (en) * | 1984-01-12 | 1985-07-24 | Water Research Centre | Flowmeter |
| JPS6352018A (en) * | 1986-08-22 | 1988-03-05 | Fujita Corp | Measuring instrument for amount of produced gas |
| JPH01221617A (en) * | 1988-02-29 | 1989-09-05 | Iseki & Co Ltd | Grain flow rate detecting device |
| CN110487336A (en) * | 2018-05-11 | 2019-11-22 | 微动公司 | Field device |
-
1982
- 1982-03-15 JP JP4121582A patent/JPS58156815A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149521A2 (en) * | 1984-01-12 | 1985-07-24 | Water Research Centre | Flowmeter |
| EP0149521A3 (en) * | 1984-01-12 | 1986-12-30 | Water Research Centre | Flowmeter |
| JPS6352018A (en) * | 1986-08-22 | 1988-03-05 | Fujita Corp | Measuring instrument for amount of produced gas |
| JPH01221617A (en) * | 1988-02-29 | 1989-09-05 | Iseki & Co Ltd | Grain flow rate detecting device |
| CN110487336A (en) * | 2018-05-11 | 2019-11-22 | 微动公司 | Field device |
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