JPS598764B2 - flow measuring device - Google Patents
flow measuring deviceInfo
- Publication number
- JPS598764B2 JPS598764B2 JP13620280A JP13620280A JPS598764B2 JP S598764 B2 JPS598764 B2 JP S598764B2 JP 13620280 A JP13620280 A JP 13620280A JP 13620280 A JP13620280 A JP 13620280A JP S598764 B2 JPS598764 B2 JP S598764B2
- Authority
- JP
- Japan
- Prior art keywords
- siphon
- fluid
- container
- flow rate
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
- G01F3/36—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with stationary measuring chambers having constant volume during measurement
- G01F3/38—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow with stationary measuring chambers having constant volume during measurement having only one measuring chamber
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/20—Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
- A61B5/207—Sensing devices adapted to collect urine
- A61B5/208—Sensing devices adapted to collect urine adapted to determine urine quantity, e.g. flow, volume
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Urology & Nephrology (AREA)
- General Physics & Mathematics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heart & Thoracic Surgery (AREA)
- Physiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Volume Flow (AREA)
Description
【発明の詳細な説明】
この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つた。Conventional devices that automatically measure flow rates using electrical signals are expensive and are not suitable for measuring minute flow rates, such as when fluid falls naturally.
この発明の目的は上記従来の欠点を解消して、微小流量
の測定に適し、簡単な構成であり、安価かつ高精度な流
量測定装置を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and provide a flow rate measuring device that is suitable for measuring minute flow rates, has a simple configuration, is inexpensive, and has high accuracy.
この発明は上記目的を達成するために、以下のような特
徴をもつている。１ 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と、上記サイホン管
の流出口より流下する流体を検出する検出手段と、その
検出から検出までの時間を測定する計時手段とを有し、
上記サイホン容器の容積と上記時間から流量を求めるよ
う構成されている。In order to achieve the above object, the present invention has the following features. 1. A siphon container consisting of a storage section with an inlet at the top, a siphon tube that communicates with the bottom of the storage section and opens downward at a predetermined height, and a detection means for detecting fluid flowing down from the outflow port of the siphon tube. and a timing means for measuring the time from detection to detection,
The flow rate is determined from the volume of the siphon container and the time.
２ 流体を上記サイホン容器の流入口から他の容器に流
路を切換える流入制御弁と、上記サイホン容器の容積と
上記時間から流量を算出する演算器を設け、流体が上記
サイホン容器から流出し始めると、上記流入制御弁が切
換わつて流入が停止し、流出完了後上記他の容器から上
記サイホン容器へ流入するよう構成されている。2. An inflow control valve that switches the flow path of the fluid from the inlet of the siphon container to another container, and a calculator that calculates the flow rate from the volume of the siphon container and the above time are provided, and the fluid starts flowing out from the siphon container. Then, the inflow control valve is switched to stop the inflow, and after the outflow is completed, the fluid flows from the other container to the siphon container.
次に、この発明の実施例について図面に基づき説明する
。第１図が上記実施例を示す構成図である。Next, embodiments of the present invention will be described based on the drawings. FIG. 1 is a configuration diagram showing the above embodiment.
第２図はその動作順序（Ａ−Ｅ）を示す動作説明図であ
る。第２図Ａに示すようにこの実施例はサイホン容器１
と、サイホン容器１の流出口□から滴下する流体を検出
する光電センサー２と、サイホン容器１内に流出入する
流体が流入、貯蔵、流出のサイクルを繰り返すよう流体
の流路を切換える三方電磁弁３と、光電センサー２出力
を導入して三方電磁弁３に制御信号を送る制御部４と、
制御部４と接続して流量を算出する演算部５と、演算部
５で求められた流量を印字するためのプリンター６から
なる。サイホン容器１は上部開口した貯蔵部８と、それ
に連通したＮ字型サイホン管９からなり、流体が一定量
貯蔵部８に溜まるとサイホン９によつて流出口７から流
出する。FIG. 2 is an operation explanatory diagram showing the operation order (A-E). As shown in FIG. 2A, this embodiment has a siphon container 1.
, a photoelectric sensor 2 that detects the fluid dripping from the outlet □ of the siphon container 1, and a three-way solenoid valve that switches the fluid flow path so that the fluid flowing in and out of the siphon container 1 repeats the cycle of inflow, storage, and outflow. 3, a control unit 4 that introduces the output of the photoelectric sensor 2 and sends a control signal to the three-way solenoid valve 3;
It consists of a calculation section 5 connected to the control section 4 to calculate the flow rate, and a printer 6 for printing the flow rate determined by the calculation section 5. The siphon container 1 consists of a storage section 8 with an open top and an N-shaped siphon pipe 9 communicating with the storage section 8. When a certain amount of fluid accumulates in the storage section 8, it flows out from the outlet 7 by the siphon 9.
光電センサー２はサイホン管９の流出口７から自然落下
する流体に光を当てて検出し、液滴検出信号Ｌを制御部
に発するセンサーである。The photoelectric sensor 2 is a sensor that illuminates and detects the fluid naturally falling from the outlet 7 of the siphon tube 9, and issues a droplet detection signal L to the control section.
制御部４は光電センサー２の液滴検出信号Ｌを入力して
、サイホン流出口７付近に雑留した液滴による該信号を
排して正確な制御信号Ｋを三方電磁弁３に発する制御回
路である。The control unit 4 is a control circuit that inputs the droplet detection signal L from the photoelectric sensor 2, eliminates the signal caused by the droplets accumulated near the siphon outlet 7, and issues an accurate control signal K to the three-way solenoid valve 3. It is.
三方電磁弁３は上記制御信号Ｋを入力して切換スイツチ
Ｓによつて流体をサイホン容器か他の流路に切換える制
御弁である。The three-way solenoid valve 3 is a control valve that receives the control signal K and switches the fluid to the siphon container or another flow path using the changeover switch S.
また制御部４によつてサイホン容器１に流入する流体の
流量がサイホン容器１から流出する量と同量あるいはそ
れ以上になると常に流出する状態になるように三方電磁
弁３の弁調節が行なわれる。演算部５は流体がサイホン
容器１に所定容量溜まり、サイホン管９により自然に流
出するまでの時間、すなわち流体がサイホン容器１に所
定容積Ｑｖ分流入するのに要した時間Ｔｉ（分）に対応
した信号を制御部４より入力し、予め入力し設定されて
いる容積Ｑｖ（Ｃｃ）と次式によつて流量Ｑ（Ｃｃ／分
）を算出する回路である。Further, the three-way solenoid valve 3 is controlled by the control unit 4 so that when the flow rate of the fluid flowing into the siphon container 1 becomes equal to or greater than the amount flowing out from the siphon container 1, the fluid always flows out. . The calculation unit 5 corresponds to the time required for a predetermined volume of fluid to accumulate in the siphon container 1 and to naturally flow out through the siphon pipe 9, that is, the time Ti (minutes) required for the fluid to flow into the siphon container 1 by a predetermined volume Qv. This circuit inputs the signal from the control unit 4 and calculates the flow rate Q (Cc/min) using the previously input and set volume Qv (Cc) and the following equation.
Ｑ＝Ｑｖ／Ｔｉ・・・・・・・・・・・・・・−（１）
この演算部５はマイクロ．コンピータによつて構成する
ことができる。Q=Qv/Ti・・・・・・・・・・・・・−(1)
This calculation section 5 is a micro. It can be configured by a computer.
プリンター６は上記算出された流量Ｑを印字するプリン
ターである。The printer 6 is a printer that prints the flow rate Q calculated above.
次に、上記実施例の制御部４の作用について説明する。Next, the operation of the control section 4 of the above embodiment will be explained.
第３図が制御部４の動作タイミングを示す光電センサー
２の出力波形図である。まずサイホン容器１から流体が
流出するに要する時間と測定する流量からサイホン容器
１の容量Ｑｖが選択される。第２図Ａではサイホン容器
１に流体が溜まりつつある状態が示されている。次に流
体が所定容量Ｑｖ分サイホン容器１に溜まると三方電磁
弁３が切換わり流体が他の流路に誘導され、流入が停止
するとともにサイホン９により流出を開始する（第２図
Ｂ）。そうすると、光電センサー２は流出口７より滴下
し始めた流体を検出し、ＮＯＮ′７の状態になる。制御
部４はこの ０Ｎ７状態がＴ１時間、例えば１〜２秒経
過した時刻ｔ１においてもなお継続しておれば、正規の
流出信号と判定する。流出が時刻Ｔ２において完了し、
第２図Ｃのように流出口７の先端に流体が残留する状態
になる。そこで光電センサー２がＸＯＦＦ″状態になり
、再び三方電磁弁３が切換わりサイホン容器１内に流体
が流入し始める（第２図Ｄ）。時刻Ｔ２以後流出口７の
先端に残留している流体が滴下し、誤信号として光電セ
ンサー２によつて第２図Ｆのように検出されるが、制御
部４は数１０ｍ秒以内のＮＯＮ７状態は正規の流出信号
と判定しない。第２図Ｅのようにサイホン容器１内に流
体が再び容量Ｑｖ分流入されると、第２図Ｂのようにサ
イホン９によつて液体が自然に流出し始め、光電センサ
ー２が〜０Ｎ７状態となる。制御部４は上述のようにそ
のＮＯＮ″状態開始からＴ１時間後の時刻Ｔ３において
正規の流出信号と判定する。このように゛して時刻ｔ１
からＴ３においてサイホン容器１による流出人の一サイ
クルが完了する。以上の流出入サイクルによつて、所定
容積Ｑｖに対する流出時間Ｔ２はＴ２＝Ｔ１＋（Ｔ２−
ｔ１）・・・・・・・・・（２）によつて決まり、また
所定容積Ｑｖに対する流入時間Ｔ３はＴ３＝（Ｔ３−ｔ
１）−Ｔ２・・・・・・・・・（３）によつて決まる。FIG. 3 is an output waveform diagram of the photoelectric sensor 2 showing the operation timing of the control section 4. First, the capacity Qv of the siphon container 1 is selected from the time required for the fluid to flow out from the siphon container 1 and the measured flow rate. FIG. 2A shows a state in which fluid is accumulating in the siphon container 1. Next, when a predetermined volume Qv of fluid is accumulated in the siphon container 1, the three-way solenoid valve 3 is switched to guide the fluid to another flow path, stopping the inflow and starting the outflow by the siphon 9 (FIG. 2B). Then, the photoelectric sensor 2 detects the fluid that has begun to drip from the outlet 7 and enters the NON'7 state. If this 0N7 state continues even after time T1, for example, at time t1 after 1 to 2 seconds, the control unit 4 determines that the outflow signal is a normal outflow signal. The outflow is completed at time T2;
As shown in FIG. 2C, fluid remains at the tip of the outlet 7. Then, the photoelectric sensor 2 goes into the XOFF'' state, the three-way solenoid valve 3 switches again, and fluid begins to flow into the siphon container 1 (D in Figure 2).After time T2, the fluid remaining at the tip of the outlet 7 drops and is detected as an erroneous signal by the photoelectric sensor 2 as shown in FIG. When the fluid flows into the siphon container 1 again by the volume Qv, the liquid starts flowing out naturally by the siphon 9 as shown in FIG. 2B, and the photoelectric sensor 2 becomes in the ~0N7 state.Control section 4 is determined to be a normal outflow signal at time T3, which is T1 hours after the start of the NON'' state, as described above. In this way, time t1
At T3, one cycle of draining the person through the siphon container 1 is completed. Through the above inflow and outflow cycles, the outflow time T2 for the predetermined volume Qv is T2=T1+(T2-
t1)......(2), and the inflow time T3 for a given volume Qv is T3=(T3-t
1)-T2...It is determined by (3).
制御部４は光電センサー２からの液滴検出信号Ｌを入力
して、上述のように正規の流出信号を判定して演算部５
に出力する。演算部５においては、その出力から（２）
式、（３）式によつてＴ３を求め、そのＴ３を上述した
（１）式のＴｉに代入することによつて流量Ｑを算出す
る。このようにして、制御部４により流体のサイホン容
器１への流出入サイクルが制御され、流人量が増加して
も三方電磁弁３の弁調節及び他の流路への切換操作によ
つて測定精度は保持される。The control unit 4 inputs the droplet detection signal L from the photoelectric sensor 2, determines a normal outflow signal as described above, and sends the signal to the calculation unit 5.
Output to. In the calculation unit 5, from its output (2)
The flow rate Q is calculated by finding T3 using the equation (3) and substituting the T3 into Ti in the above-mentioned equation (1). In this way, the control unit 4 controls the cycle of fluid flowing into and out of the siphon container 1, and even if the flow rate increases, it can be controlled by adjusting the three-way solenoid valve 3 and switching to another flow path. Measurement accuracy is maintained.
第，４図は横軸に実測した真の流量値、縦軸にこの実施
例を用いて測定した流量値を示しており、実線はこの実
施例による測定精度で、破線が従来の流量計精度である
。この第４図に示すように、この実施例は測定流量値と
真値が直線関係になるような測定精度を有し、大きい流
量値に対して従来と比べて精度のよい測定値を得ること
ができる。上記実施例では流体がサイホン容器から流出
することを検出する手段として光電センサーによつてお
り、検出光として可視光、赤外状、紫外線などの光線を
用いることができ、また放射線、磁気などを利用した検
出手段又は可動接点によつても構成することができる。
また、この発明は変形実施例として複数個のサイホン容
器を用いて実施することができる。In Figure 4, the horizontal axis shows the true flow rate value actually measured, and the vertical axis shows the flow rate value measured using this example.The solid line shows the measurement accuracy by this example, and the broken line shows the accuracy of the conventional flowmeter. It is. As shown in Fig. 4, this embodiment has measurement accuracy such that the measured flow rate value and the true value have a linear relationship, and it is possible to obtain a measurement value with higher accuracy than the conventional method for large flow rate values. I can do it. In the above embodiment, a photoelectric sensor is used as a means for detecting that the fluid flows out from the siphon container, and visible light, infrared light, ultraviolet light, etc. can be used as the detection light, and radiation, magnetism, etc. can be used as the detection light. It can also be configured by using detection means or movable contacts.
Additionally, the present invention can be practiced using multiple siphon vessels in a modified embodiment.
すなわち、流体が溜まる容量がそれぞれ整数倍異なる複
数個のサイホン容器と、各容量に対応した流入時間にな
るように各容器への流路を切換える多方切換弁を設けた
構成にすることができる。このような変形実施例によれ
ば、広い流量測定範囲をもつた流量測定装置を得ること
ができる。以上のようにこの発明によれば、次に列挙す
る効果をもつている。That is, a configuration can be provided in which a plurality of siphon containers each having an integer multiple of fluid storage capacity and a multi-way switching valve that switches the flow path to each container so that the inflow time corresponds to each capacity. According to such a modified embodiment, a flow rate measuring device having a wide flow rate measuring range can be obtained. As described above, the present invention has the following effects.
１簡単な構成により微小流量測定を行うことができる。1. Micro flow rate measurement can be performed with a simple configuration.
２サイホン容器内へ流体を間欠的に流入させて流量測定
を行なうので、流路を開放状態にして使用することがで
きる。Since the flow rate is measured by intermittently flowing fluid into the two-siphon container, it can be used with the flow path open.
３サイホン容量をかえるだけで、流量測定範囲を設定す
ることができる。3. Flow rate measurement range can be set by simply changing the siphon capacity.
４上記１，２，３によつて、安価かつ実用的な流量測定
装置を得ることができる。4. According to 1, 2, and 3 above, an inexpensive and practical flow measuring device can be obtained.
第１図はこの発明の実施例の構成図である。
第２図はＡ−Ｅにおいて動作順序を示す動作説明図であ
る。第３図は上記実施例の制御部４の作用を示す出力波
形図である。第４図は上記実施例の精度を説明するため
の測定精度グラフである。１・・・・・・サイホン容器
、２・・・・・・光電センサー、３・・・・・・三方電
磁弁、４・・・・・・制御部、５・・・・・・演算部。FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is an operation explanatory diagram showing the operation order in A-E. FIG. 3 is an output waveform diagram showing the operation of the control section 4 of the above embodiment. FIG. 4 is a measurement accuracy graph for explaining the accuracy of the above embodiment. 1... Siphon container, 2... Photoelectric sensor, 3... Three-way solenoid valve, 4... Control section, 5... Calculation section .
Claims (1)
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
なるサイホン容器と、上記サイホン管の開口部より流下
する流体を検出する検出手段と、その検出から検出まで
の時間を測定する計時手段と、上記流入口からの上記サ
イホン容器への流体流入を制御する流入制御弁とを有し
、上記サイホン容器への流体流入を、流体が上記開口部
から流出し始めると停止し、流出完了後に開始するよう
制御し、上記サイホン容器の容積と上記時間から流量を
求めるよう構成された流量測定装置。1. A siphon container consisting of a storage section with an inlet at the top, a siphon tube that communicates with the bottom of the storage section and opens downward at a predetermined height, and a detection means for detecting fluid flowing down from the opening of the siphon tube. , a timer for measuring the time from detection to detection, and an inflow control valve for controlling fluid inflow into the siphon container from the inflow port, the fluid inflow into the siphon container being controlled by the flow control valve. A flow rate measuring device configured to control the flow to stop when the flow starts from the opening and to start after the flow is completed, and to determine the flow rate from the volume of the siphon container and the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13620280A JPS598764B2 (en) | 1980-09-29 | 1980-09-29 | flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13620280A JPS598764B2 (en) | 1980-09-29 | 1980-09-29 | flow measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5760216A JPS5760216A (en) | 1982-04-12 |
| JPS598764B2 true JPS598764B2 (en) | 1984-02-27 |
Family
ID=15169714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13620280A Expired JPS598764B2 (en) | 1980-09-29 | 1980-09-29 | flow measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598764B2 (en) |
-
1980
- 1980-09-29 JP JP13620280A patent/JPS598764B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5760216A (en) | 1982-04-12 |
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