【発明の詳細な説明】〔を業との利用分野〕本発明は飲料自動販売機における原料液体収容容器等の
容器中の液位を差圧測定器を用いて測定する装置、特に
液体の密度が変化しても容易に液位測定を行うことがで
きかつ構成の簡単な装置に関する。[Detailed Description of the Invention] [Field of Application] The present invention relates to a device for measuring the liquid level in a container such as a raw material liquid storage container in a beverage vending machine using a differential pressure measuring device, and in particular to a device for measuring the liquid level in a container such as a raw material liquid storage container in a beverage vending machine. The present invention relates to a device that can easily measure a liquid level even when the liquid level changes and has a simple configuration.
第２図は本出願人の出願になる従来の液位測定装置１の
構成説明図である（特願昭６３−３１１０５８号明細書
参照）８図において、２は測定対象の液体３を収容した
容器４とこの容器４の開口部４ａを密閉的に禍いだ蓋５
とからなる密閉容器、６は一端が容器４中の液体３内に
挿入されかつ他端６１が密閉容器２の上方に配置される
ことになるように蓋５に気密に貫設した液体排出管、７
は容器ｚ中の液体３の上の気体９を、＠５に貫設した加
圧管８を介して加圧すること忙よって前記液体３を排出
管６の上ｇｌｌｓａから排出するようにしたガスボンベ
のような圧力源で、１０は排出管６の上端６ｍから排出
される液体３の排出を停止させるよ５に、管端６ａＫ接
続した流出管ｔｔＶＣ設けた止弁である。排出管６の容
器２から上方に突出した部分圧は高さΔＨだけ離して下
部圧力取出口１２と下部圧力取出口１３とが設げられて
おり、さらに、圧力取出口１２には差圧測定器１４にお
ける一方の導圧口１４ａが接続され、ａＥ力取出ロ１３
には差圧測定器１５における一方の導圧口１５１１ｂ”
−接続されている。そうして、差圧測定器１４゜１５の
それぞれにおける他方の導・圧口１４ｂ、１５ｂはそれ
ぞれ導圧管１６．１７を介していずれも加圧管８内Ｖｃ
開口させられている。１Ｂは差圧測定器１４．Ｌ５のそ
れぞれが出力する差圧信号ｔ４ｃ、ｔ５ｃの両信号が共
に入力され、後述する演算を行ってその結果に応じた信
号ｔｓｓｔを出力するよう圧した演算器で、前述した液
位測定装置崖ｌは容器２を除（図示の各部で構成されて
いる。FIG. 2 is an explanatory diagram of the configuration of a conventional liquid level measuring device 1 filed by the present applicant (see the specification of Japanese Patent Application No. 63-311058). In FIG. A lid 5 that seals the container 4 and the opening 4a of the container 4.
and a liquid discharge pipe 6 which is airtightly penetrated through the lid 5 so that one end is inserted into the liquid 3 in the container 4 and the other end 61 is placed above the closed container 2. ,7
is a gas cylinder in which the gas 9 above the liquid 3 in the container z is pressurized via the pressurizing pipe 8 penetrating through the container z, and the liquid 3 is discharged from the upper gllsa of the discharge pipe 6. 10 is a stop valve provided with an outflow pipe ttVC connected to the pipe end 6aK at 5 to stop the discharge of the liquid 3 discharged from the upper end 6m of the discharge pipe 6. A lower pressure outlet 12 and a lower pressure outlet 13 are provided to measure the partial pressure of the discharge pipe 6 that protrudes upward from the container 2 by a height ΔH. One pressure guiding port 14a in the device 14 is connected, and the aE force extraction port 13
One pressure guiding port 1511b in the differential pressure measuring device 15"
- Connected. Then, the other guide/pressure ports 14b and 15b in each of the differential pressure measuring devices 14 and 15 are connected to Vc in the pressure pipe 8 via the pressure guide pipes 16 and 17, respectively.
It is opened. 1B is a differential pressure measuring device 14. The differential pressure signals t4c and t5c output by each of the L5s are inputted together, and the above-mentioned liquid level measuring device cliff 1 is composed of the parts shown in the figure, excluding the container 2.
第２図では各部が上述のよ５に構成されているので、止
弁１０を開くと、容器２中の液体３が圧力源７のために
加圧されて排出管６．流出管１１を順次通して容器２外
へ排出される。そこで、液体３がこのようにして容器２
外に排出されている時に止弁１０を閉じると、排出管６
内での液体３の流動が停止するが、この場合上部圧力取
出口１３よりも上方にトリ千エリ−のＸ空を生じて排出
管６内の液体３が静止するよ５に要部が＄成されている
ので、このように管６内の液体３が静止した時の圧力取
出口１２．１３のそれぞれにｔａげろ液体３の圧力をそ
れぞれＰａ、Ｐｂとすると、気体９の圧力をＰｇ、液体
３の容器４の底部４ｂを基準にした液位をＨ０圧力を出
口１２．１３の底部４ｂからの高さをそれぞれＨ，、Ｈ
，として、 （１１，（２）、 （３）の各式が成立す
る。ここに、ｒは液体３の密度である。In FIG. 2, each part is configured as 5 as described above, so when the stop valve 10 is opened, the liquid 3 in the container 2 is pressurized by the pressure source 7 and the discharge pipe 6. It passes sequentially through the outflow pipe 11 and is discharged to the outside of the container 2. Therefore, the liquid 3 is transferred to the container 2 in this way.
If the stop valve 10 is closed while the discharge is being carried out, the discharge pipe 6
The flow of the liquid 3 in the discharge pipe 6 stops, but in this case, a 1,000-El. Therefore, when the liquid 3 in the tube 6 is at rest, the pressure of the liquid 3 at each of the pressure outlets 12 and 13 is Pa and Pb, respectively, and the pressure of the gas 9 is Pg, The liquid level of the liquid 3 based on the bottom 4b of the container 4 is H0 pressure, and the height of the outlet 12.13 from the bottom 4b is H, , H, respectively.
, the following equations (11, (2), and (3) hold true. Here, r is the density of the liquid 3.
Ｈ，＝）（、＋ΔＨ・・・・・・ （１）Ｐａ＋（Ｈｌ
−Ｈ） −ｒ＝Ｐｇ ・−−−−−（Ｚ）Ｐｂ＋
（Ｈ，−Ｈ）−ｒ−Ｐｇ ・−−−−−（３）と
ころが、Ｃυ〜（３）式からＣ６式が得られるのでこの
（４）式と（２式とを用いてＣＳ式が得られ、また（４
）式と（２式とを用いてＣ０式が得られる。そうして、
（５式との）式とは、ＨｌとＨ！どのいずれか一方と
ΔＨとが既知であると、差圧測定器１４が出力する差Ｅ
Ｅ（Ｐａ−Ｐｇ）に応じた差圧信号１４Ｃと差圧測定器
１５が出力する差圧（Ｐｂ−Ｐｇ）に応じた差圧信号１
５Ｇとを用いることによって液位Ｈ６”−求められるこ
とを示している。H, =) (, +ΔH... (1) Pa+(Hl
-H) -r=Pg ・----(Z)Pb+
(H, -H)-r-Pg ・------(3) However, since the C6 equation is obtained from the Cυ~(3) equation, the CS equation can be obtained using this (4) equation and (2 equation). obtained, and (4
) formula and (2 formula) can be used to obtain the C0 formula. Then,
The equations (with equation 5) are Hl and H! If either one and ΔH are known, the difference E output by the differential pressure measuring device 14
Differential pressure signal 14C corresponding to E (Pa-Pg) and differential pressure signal 1 corresponding to the differential pressure (Pb-Pg) output by the differential pressure measuring device 15
It shows that the liquid level H6''- can be determined by using 5G.
γ＝ （（Ｐａ−Ｐｇ）−（Ｐｂ−Ｐｇ） ＋／ΔＨ−
−−−−−（４）Ｈ−Ｈ，＋ΔＨ−（Ｐａ−Ｐｇ）／［
（Ｐｌｌ−Ｐｇ）−（Ｐｂ−Ｐｇ）ト−（５Ｈ＝Ｈ，＋
ΔＨ−（Ｐｂ−Ｐｇ）／［（Ｐ ａ−Ｐｇ）−（Ｐｂ−
Ｐｇ） １−（ｆ３第２図の演算器１８は、信号１４Ｃ
とｔＳＣとが入力されると、（５１式右辺または（ｅ右
左辺の演算を行って液位Ｈに応じた信号１８ａを出力す
るように構成されている、液位測定装置１は上述のよって構成されているので、こ
の測定装置１においては、液体３の密度γが自動的に測
定されてこの測定されたγを用いて液位Ｈ６−自動的に
算出され−ることになる。したがって、この装ｆｉｌＫ
よれば、密度ｒが空化しても極ぬて容易に液位Ｈを測定
することができ、しかも、この場合、液体３を原料液体
として収容した飲料自動販売機におけるような密閉容器
２に通常設けられている。上述した圧力源７と加圧管８
と液体排出管６と流出管１１と止弁ｌＯとからなる排液
手段１９を利用して液位測定を行うことができて、容器
４の側９１＄に液体３や気体９のための特別な圧力噴出
口を設ける必要ｂｓないので、上記の液位測定装置ＩＫ
は、同じ容器２に種類の異なる液体３が充填されること
がしばしばあり、また、容器２に収容された同じ液体３
でありながら排出管６に流入する該液体の密度γｂ１往
々にして経時的に異なることがあり、そのうえ、容器４
ＶＣ。γ= ((Pa-Pg)-(Pb-Pg) +/ΔH-
−−−−−(4) H−H, +ΔH−(Pa−Pg)/[
(Pll-Pg)-(Pb-Pg)-(5H=H, +
ΔH-(Pb-Pg)/[(P a-Pg)-(Pb-
Pg) 1-(f3 The arithmetic unit 18 in FIG. 2 receives the signal 14C.
When tSC and tSC are input, the liquid level measuring device 1 is configured to calculate the right side of Equation 51 or (e) and output the signal 18a according to the liquid level H. Therefore, in this measuring device 1, the density γ of the liquid 3 is automatically measured and the liquid level H6 is automatically calculated using the measured γ. This outfit filK
According to the method, the liquid level H can be measured very easily even when the density r is empty, and in this case, the liquid level H can be measured very easily. It is provided. The above-mentioned pressure source 7 and pressurizing pipe 8
The liquid level can be measured using a liquid draining means 19 consisting of a liquid draining pipe 6, an outflow pipe 11 and a stop valve lO, and a special pipe for liquid 3 or gas 9 is placed on the side 91 of the container 4. Since there is no need to provide a pressure outlet, the above liquid level measuring device IK
The same container 2 is often filled with different types of liquid 3, and the same liquid 3 contained in the container 2 is
However, the density γb1 of the liquid flowing into the discharge pipe 6 often varies over time, and in addition, the density of the liquid flowing into the discharge pipe 6
V.C.
は上述した液体３や気体９用の特別な圧力取出口が設け
られていない通常の飲料自動販売機に該測定装置１を適
用すると、容器２内の液位Ｈを嘲単に測定できるために
、該容器の交換作業を、容器２を損って該容器内の液体
３の残量を推定するなどの従来性われている面倒な手洋
業を経ないで。When the measuring device 1 is applied to a normal beverage vending machine that is not provided with the above-mentioned special pressure outlet for the liquid 3 or gas 9, the liquid level H in the container 2 can be easily measured. The container is replaced without going through the conventional troublesome manual work of damaging the container 2 and estimating the remaining amount of liquid 3 in the container.
まことに経済的に行うことができるという利点がある。It has the advantage that it can be done economically.
〔発明が解決しよ５とする課櫃〕液位測定装置１には上述の利点があるが、この場合差圧
測定器がｔｉ、ｔｓと二台必要であるため測定値ｆｆ１
１の構成が複雑で、このような理由から測定装置１には
該装置自体の製作に手間がかかるという問題点がある。[Challenge 5 to be solved by the invention] The liquid level measuring device 1 has the above-mentioned advantages, but in this case, two differential pressure measuring devices, ti and ts, are required, so the measured value ff1
1 has a complicated configuration, and for this reason, the measuring device 1 has a problem in that it takes time and effort to manufacture the device itself.
本発明の目的は、上述のような差圧測定器を用いて液位
測定を行う液位測定装置において該差圧測定器を一白設
げるだけでよいよ５にして、＊ｔｉ。An object of the present invention is to provide a liquid level measuring device that measures a liquid level using a differential pressure measuring device such as the one described above, so that it is sufficient to provide only one differential pressure measuring device.
位測定装置の製作に手間がかからないようにすることに
ある。The purpose of this invention is to reduce the amount of time and effort required to produce a position measuring device.
上記目的を達成するため１本発明によれば、筒体状の容
器に収容された液体中に一端が挿入されかつ他端が前記
容器の上方に配置された管体と。According to one aspect of the present invention, there is provided a tube body, one end of which is inserted into a liquid contained in a cylindrical container, and the other end of which is disposed above the container.
排液指令信号が入力されるごとに前記容器中の前記液体
の所定量を前記管体の前記他端を介して前記容器外に排
出する排液手段と、前記容器に収容された前記液体の上
の気体の圧力と前記管体の所定の高さ位嘗における咳管
体内の前記液体の圧力との差圧を測定してその結果に応
じた差圧信号を出力する差圧測定器と、前記差圧信号と
前記排液指令信号とが入力されかつ前記排液指令信号が
所定回数入力される前後での前記差圧信号の６値を用い
て所定の演算を行って前記容器中の前記液体の液位に応
じた液位信号を出力する演算部とを備え、前記液位信号
にもとづき前記液位を測定するように液位測定装置を構
成する。liquid draining means for draining a predetermined amount of the liquid in the container to the outside of the container via the other end of the pipe body each time a drain command signal is input; a differential pressure measuring device that measures the differential pressure between the pressure of the gas above and the pressure of the liquid inside the cough tube at a predetermined height of the tube and outputs a differential pressure signal according to the result; A predetermined calculation is performed using six values of the differential pressure signal before and after the differential pressure signal and the drain command signal are input and the drain command signal is input a predetermined number of times, and the drain command signal is inputted. The liquid level measuring device is configured to include a calculation section that outputs a liquid level signal corresponding to the liquid level, and to measure the liquid level based on the liquid level signal.
上記のよ５に構成すると、容器が筒体状であるから該容
器の軸線に垂直な該容器の断面積が一定で、このため排
液手段に排液指令信号が入力されるごと忙、容器中の液
位が液体の所定・量に応じた液位だけ減少して差圧測定
器が検出する差圧が管体中の液体の密度に比例して変化
するので、演算部に差圧信号と排液ｉ→倍信号を用いて
後述する演算を行わせることによって該演算部から容器
中の液位な正しく表す液位信号を出力させることができ
て、この績果、差圧測定器を一台だけ用いるので構成が
簡単でしたＩ！！１って製作に手間がかからない液位測
定装置が得られることＫなる。With configuration 5 above, since the container is cylindrical, the cross-sectional area of the container perpendicular to the axis of the container is constant. The liquid level inside the tube decreases by a level corresponding to the predetermined amount of liquid, and the differential pressure detected by the differential pressure measuring device changes in proportion to the density of the liquid in the tube, so a differential pressure signal is sent to the calculation unit. By performing the calculation described later using the effluent i → multiplied signal, the calculation unit can output a liquid level signal that accurately represents the liquid level in the container. As a result, the differential pressure measuring device can be used The configuration was easy as only one unit was used! ! 1. It is possible to obtain a liquid level measuring device that does not require much time and effort to manufacture.
第１図は本発明の一実施例の構成説明図である。FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention.
図において、第２図と異なる所は、第２図に示した差圧
測定器１５が設けられていないことと、ＷＩ２図におけ
る止弁１０．演算器１８のそれぞれに対応した止弁２０
．演算部２１がそれぞれ以下に説明するように構成され
ていることと、止弁２゜よりも上流伺の流出管１１の部
分に瞬時流量が所定値ＱＶｃなるように自動的に制御す
る流量制御弁２２が設げられていることで、この場合、
止弁２゜は、常時は閉状態であるが、制御部２３が出方
する排液指令信号２３ａが入力されるごとに所定時間Ｔ
の間だけ開状態となるように構成されている。The difference between the figure and FIG. 2 is that the differential pressure measuring device 15 shown in FIG. 2 is not provided, and the stop valve 10 in FIG. WI2 is not provided. A stop valve 20 corresponding to each of the computing units 18
．． The calculation unit 21 is configured as described below, and there is a flow rate control valve that automatically controls the instantaneous flow rate to a predetermined value QVc in a portion of the outflow pipe 11 upstream of the stop valve 2°. 22 is provided, in this case,
The stop valve 2° is normally closed, but it closes for a predetermined time T every time the drain command signal 23a issued by the control unit 23 is input.
It is configured to be in an open state only during this period.
第１図ておいては、止弁２０がこのよって構成されかつ
制御弁２２が前述のよって構成されているので、制御弁
２３から指令信号２３ａが一回出方されると、弁２００
−開くことによって王カ源７によって加圧された容器２
内の液体３が排出管６゜流出１ｔｌｔを順次通って所定
１１ＱＴだけ容器２外へ排出される。したがって、この
場合、加圧手段７と加圧管８と排出管６と流出管１１と
制御弁２２と止弁２０とで、排液指令信号２３ａが入力
されるごとに容器ｚ中の液体３の所定量ＱＴを管体６の
前述した他端６ａを介して容器２外に排出する排液手段
２４を構成しているということができる。In FIG. 1, since the stop valve 20 is constructed in this manner and the control valve 22 is constructed in the manner described above, once the command signal 23a is output from the control valve 23, the valve 200
- a container 2 pressurized by a power source 7 by opening;
The liquid 3 inside passes sequentially through the discharge pipe 6° and the outflow 1tlt and is discharged to the outside of the container 2 for a predetermined distance of 11QT. Therefore, in this case, the pressurizing means 7, the pressurizing pipe 8, the discharge pipe 6, the outflow pipe 11, the control valve 22, and the stop valve 20 control the liquid 3 in the container z every time the drain command signal 23a is input. It can be said that it constitutes a liquid draining means 24 for discharging a predetermined amount QT to the outside of the container 2 via the other end 6a of the tube body 6 mentioned above.
第１図においては各部が上述のように構成されているの
で、この場合も第２図におげろと同様に（３弐〇１成立
する。したがって、弁２０が閉じている状態での液位Ｈ
の値をＨｍｓ、この状態において差８：測定器１４が検
出する差圧を（Ｐａ−Ｐｇ）、とし。In Fig. 1, each part is configured as described above, so in this case as well, (3201 holds true) in the same way as in Fig. 2. Therefore, the liquid level when the valve 20 is closed is H
The value of is Hms, and in this state, the difference 8: The differential pressure detected by the measuring device 14 is (Pa-Pg).
止弁２０に排液指令信号２３ａが１回入力されて容器２
から（ｎ−ＱＴ）の液体３が排出された後の止弁２０が
閉じた状態における液位Ｈの値を８ｍ２゜この状９にお
いて差圧測定器１４が検出する差圧を（Ｐａ−ＰＲ）ｔ
とすると、（３式から（７）式が得られるので、この（
７）式から（８式が求められる。The drain command signal 23a is input once to the stop valve 20, and the container 2
The value of the liquid level H in the state where the stop valve 20 is closed after the liquid 3 of (n-QT) has been discharged is 8 m2°.The differential pressure detected by the differential pressure measuring device 14 in this state 9 is (Pa-PR )t
Then, equation (7) is obtained from equation (3), so this (
From equation 7), equation (8) is obtained.
ｒ＝（ＣＰａ Ｐｇ）ｔ−（Ｐａ−Ｐｇ）ｔｌ／（Ｈ
ｍｔ−Ｈｍｚ）・・・・・・ （印ところが、この場合、容器４の底部４ｂの断面積を８と
すると（９）式が成立するので、（８式と（９式とから
（１０）式が得られ、したがって、 （１０）式と（
７）式とから（１１）式及び（１２）式ｂ；得られる。r=(CPa Pg)t-(Pa-Pg)tl/(H
mt-Hmz)... (mark) However, in this case, if the cross-sectional area of the bottom 4b of the container 4 is 8, then equation (9) holds true, so from equation (8 and equation (9), (10) The equation (10) and (
From formula 7), formulas (11) and (12) b are obtained.
そうして。Then.
（１２）式は、Ｈ，、Ｓ及びＱ Ｔ ６”−既知である
ノテ、ｎ。Equation (12) is H, , S and Q T 6''-note, n.
（Ｐａ−Ｐｇ）＋及び（Ｐａ Ｐｇ）ｔを知ること虻よ
って液位Ｈｍ２が求められることを示している。そこで
。This shows that the liquid level Hm2 can be determined by knowing (Pa-Pg)+ and (Pa Pg)t. Therefore.
第１図においては演算部２１が、入力される排液指令信
号２３ａの入力回数からｎを計数し、また入力される差
圧信号１４Ｃから（Ｐａ Ｐｇ）を及び（Ｐａ−Ｐｇ）
ｔを検出して、しかる後（１２）右辺辺の演算を行って
その結果の液位Ｈｍ２に応じた信号２１ａを液位信号と
して出力するように構成されている。第１図＆［おける
２５は容器２を除く図示の各部からなる１夜位測定装置
である。In FIG. 1, the calculation unit 21 counts n from the number of inputs of the input drain command signal 23a, and calculates (Pa Pg) and (Pa-Pg) from the input differential pressure signal 14C.
t is detected, and then (12) the calculation on the right side is performed and a signal 21a corresponding to the resulting liquid level Hm2 is output as a liquid level signal. Reference numeral 25 in FIG.
Ｓ −（Ｈｍｌ−）Ｔｍ２ ）−ｎ −ＱＴ
・−” （９）ｒ ＝ （Ｓ／（ｎ＠ＱＴ） ｌ ・
［（Ｐ ａ Ｐ ｇ）ｔ −（Ｐ ａ−Ｐｇ）ｔｌ−−
（１０）Ｈｍｔ＝）Ｔｔ＋（ｎａＱＴ−（Ｐａ−Ｐｇ）
＋ｌ／Ｃ８＊ （（Ｐａ−Ｐｇ）。S-(Hml-)Tm2)-n-QT
・−” (9) r = (S/(n@QT) l ・
[(P a P g)t - (P a-Pg) tl--
(10) Hmt=)Tt+(naQT-(Pa-Pg)
+l/C8* ((Pa-Pg).
（Ｐ ａ −Ｐ ｇ ）ｔ ｌ 、ｌ ”＝（１１）Ｈ
ｍ ｚ＝Ｈ１＋ （ｎ−ＱＴ’ （Ｐ ａ −Ｐ ｇ
）！ ＋、／Ｃ８・（（Ｐ ａ−Ｐｇ ）を−（Ｐａ−
Ｐｇ）雪）〕・・・・・・（１２）第１図においては、
Ｍ、位測定装置２５つを上述のように構成されているの
で、液位信号２１ａによりて液位Ｈｎｘ２を測定し得る
ことが明らかで、また。(P a −P g )t l , l ”=(11)H
m z=H1+ (n-QT' (P a -P g
)! +, /C8・((Pa−Pg) −(Pa−
Pg) Snow)〕・・・・・・(12) In Figure 1,
Since the 25 level measuring devices are configured as described above, it is clear that the liquid level Hnx2 can be measured using the liquid level signal 21a.
この場合も、前述した液位測定装置ｌｌにおげろと同様
に、液体３の密度ｒが自動的に測定されてこの測定され
たγを用いて液位Ｈｍ２が自動的に算出されることが上
述した所から明らかである。故に。In this case as well, the density r of the liquid 3 is automatically measured and the liquid level Hm2 is automatically calculated using the measured γ, as in the case of using the liquid level measuring device ll described above. This is clear from the above. Therefore.
この測定装置２５によれば、測定器ａｔの場合と同様に
、密度ｒｂ″−変化しても極めて容易に液位Ｈな測定す
ることができ、また、この測定器［２５を飲料自動販売
機に適用すると、容器２の交換作業をまことに経済的忙
行うことができるうえ、さらに、この測定装置２５にお
いては、差圧測定器が一台あればよいので測定装置ｌの
場合よりも装置構成が簡単で、したがって測定装置ＩＫ
おけるよりも少ない工数で測定装置２５を製作すること
ができることになる。According to this measuring device 25, as in the case of the measuring device at, it is possible to very easily measure the liquid level H even if the density rb'' changes. When applied to this, the replacement work of the container 2 can be carried out economically and in a timely manner.Furthermore, in this measuring device 25, only one differential pressure measuring device is required, so the device configuration is simpler than in the case of the measuring device 1. Simple and therefore measuring device IK
This means that the measuring device 25 can be manufactured with fewer man-hours than would otherwise be required.
なお、測定装置２５においては演算部２１においてｎを
任意に設定し得るよ５に構成されているので、今、演算
部２１でｎ−１と設定すると、排液指令信号２３ａが止
弁２０に入力されてこの止弁が時間Ｔの開動作を行う都
度、該止ｇ ２０ ｂ＝閉じた後（１２）右辺辺のＱ
ｗ ｌとした場合の演算が演算部２１で行われて液位Ｈ
ｍ２に応じた液位信号２１ａが１″１１．演算部から出
力されることになるが、測定・装置２５の場合、止弁２
０の一回の開動作で実際に排出される液体３の容積ｖ１
は、常て正確にＱＴに等しい容積ではなくて、該ＱＴに
対してばらついているのが通例であるから Ｑ ｗ ｌ
とした場合に信号ｚ１ａｂＳ表す液位Ｈｍ２には比較的
大きいＷ 差６−含まれてることになる。そこで、ｎを
大きくすると容積Ｖ、のばらつきが平均化される結果止
弁２０の１回の開動作で実際に排出される。液体３の容
積７口がｎ・ＱＴに近づくことが明らかであるから、測
定装置Ｒ２５においてはｎを太き（することによって精
度の高い液位測定結果が得られることになる。In addition, since the measuring device 25 is configured so that n can be arbitrarily set to 5 in the calculation unit 21, if n-1 is set in the calculation unit 21 now, the drain command signal 23a is sent to the stop valve 20. Each time this stop valve performs an opening operation for time T, the stop g 20 b = After closing (12) Q on the right side
Calculation when w l is performed in the calculation unit 21, and the liquid level H
The liquid level signal 21a corresponding to m2 is output from the 1"11. calculation section, but in the case of the measuring device 25, the stop valve 2
Volume v1 of liquid 3 actually discharged in one opening operation of 0
Q w l is not always exactly the same volume as QT, but usually varies with respect to QT.
In this case, the liquid level Hm2 represented by the signal z1abS includes a relatively large W difference 6-. Therefore, when n is increased, variations in the volume V are averaged out, and as a result, the liquid is actually discharged with one opening operation of the stop valve 20. It is clear that the volume of the liquid 3 approaches n·QT, so in the measuring device R25, by increasing n, highly accurate liquid level measurement results can be obtained.
液位測定装置２５においては演算部２１が液位Ｈｍ２に
応じた液位信号Ｚｔａを出力するように構成されている
ｂ−１この測定器ｆｉ１２５によれば、演算部２１０機
能を変えることによって液位Ｈｍｔの測定も可能である
ことが（１り式から明らかである。In the liquid level measuring device 25, the calculating section 21 is configured to output a liquid level signal Zta according to the liquid level Hm2.b-1 According to this measuring instrument fi125, the liquid It is clear from equation 1 that it is also possible to measure the position Hmt.
また、上述の実施例は密閉容器２に対するものであった
が１本発明は開放容器中の液位測定にも適用できるもの
であって、その場合、容器中の液体３を該容器外へ排出
する。第１図の排液手段２４に対応した排液手段は、た
とえば、液体排出管６と流出管１１と該流出管に設けら
れかつ排液指令信号２３ａが入力されると時間Ｔの間だ
け動作する定流借吸引ポンプとで構成されることになる
。Further, although the above-mentioned embodiment was for a closed container 2, the present invention can also be applied to liquid level measurement in an open container, and in that case, the liquid 3 in the container can be discharged to the outside of the container. do. A liquid drain means corresponding to the liquid drain means 24 in FIG. 1 is provided, for example, in the liquid discharge pipe 6, the outflow pipe 11, and the outflow pipe, and operates only for a time T when the liquid drain command signal 23a is input. It will consist of a constant flow suction pump.
上述したように１本考案においては、′１１ｖＩ体状の
容器に収容された液体中に一端が神式されかつ他端ｂ１
前記容器の上方に配置された管体と、排液指令信号が入
力されるごとに容器中の液体の所定量を管体の他端を介
して容器外だ排出する排液手段と、容器に収容された液
体の上の気体の圧力と管体の所定の高さ位ＩＩｔＩＩＣ
おける核管体内の液体の圧力との差圧を測定してその結
果に応じた差圧信号を出力する差圧測定器と、差圧信号
と排液指令信号とが入力されかつ排液指令信号が所定回
数入ヵされる前後での差圧信号の６値を用いて所定の演
算を行って容器中の液体の液位に応じた液位信号を出力
する演算部とを備え、この液位信号にもとづいて液位を
測定するように液位測定装置を、構成した。As mentioned above, in the present invention, one end is immersed in a liquid contained in a '11vI-shaped container, and the other end b1
a tube disposed above the container; a liquid drain means for draining a predetermined amount of liquid in the container out of the container through the other end of the tube each time a drain command signal is input; The pressure of the gas above the contained liquid and the predetermined height of the tube IItIIC
A differential pressure measuring device that measures the differential pressure between the pressure of the liquid in the nuclear tube and outputs a differential pressure signal according to the result, and a differential pressure measuring device that outputs a differential pressure signal according to the result; a calculation unit that performs a predetermined calculation using six values of differential pressure signals before and after the liquid is entered a predetermined number of times, and outputs a liquid level signal corresponding to the liquid level in the container; The liquid level measuring device was configured to measure the liquid level based on the signal.
このため、上記のように構成すると、容器が筒体状であ
るから該容器の軸線に垂直な該容器の断面積が一定で、
このため排液手段に排液指令信号が入力されるごとに、
容器中の液位が液体の所定竜に応じた液位だげ減少して
差圧測定器が検出する差圧が管体中の液体の密度に比例
して変化するので、演算部に差圧信号と′ｍ液指→信号
とを用いて後述する演算を行わせることＫよって該演算
部から容器中の液位な正しく表す液位信号を出力させる
ことができて、この結果１本発明には、差圧測定器を一
台だけ用いるので構成が簡単でしたがって製作に手間が
かからない液位測定装置が得られる効果がある。Therefore, with the above configuration, since the container is cylindrical, the cross-sectional area of the container perpendicular to the axis of the container is constant;
Therefore, every time a drain command signal is input to the drain means,
The liquid level in the container decreases according to the predetermined level of the liquid, and the differential pressure detected by the differential pressure measuring device changes in proportion to the density of the liquid in the tube. By performing the calculation described later using the signal and the 'm liquid finger → signal, it is possible to output a liquid level signal that correctly represents the liquid level in the container from the calculation section, and as a result, one aspect of the present invention is achieved. Since only one differential pressure measuring device is used, the liquid level measuring device is simple in construction and requires no effort to manufacture.
第１図は本発明の一実施例の構成説明図、第２図は従来
の液位測定装置の構成説明図である。１．２５・・・・・・液位測定装置、２・・・・・・密
閉容器、３・・・液体、６・・・・・・液体排出管、
６ａ・・・・・・他端、９・・・・・・気体。１４．１５・・・・・・差圧測定器、１４ａｌ １５ａ
・・・・・・差圧信号。１９．２’）・・・・・・排液手段、 ２１・・・・
・・演算部、Ｚｔａ・・・・・・液位信号、２３ａ−・
・−排液指令信号、 Ｈ、Ｈｍｌ 、Ｈｍ２−・・・・
−蔦 １閉箋 ２FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the configuration of a conventional liquid level measuring device. 1.25...Liquid level measuring device, 2...Airtight container, 3...Liquid, 6...Liquid discharge pipe,
6a...Other end, 9...Gas. 14.15...Differential pressure measuring device, 14al 15a
・・・・・・Differential pressure signal. 19.2')... Drainage means, 21...
...Calculation unit, Zta...Liquid level signal, 23a-...
・-Drain command signal, H, Hml, Hm2-...
-Ivy 1 Closed note 2
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10056889AJPH02278126A (en) | 1989-04-20 | 1989-04-20 | Liquid level measuring apparatus |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10056889AJPH02278126A (en) | 1989-04-20 | 1989-04-20 | Liquid level measuring apparatus |
| Publication Number | Publication Date |
|---|---|
| JPH02278126Atrue JPH02278126A (en) | 1990-11-14 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10056889APendingJPH02278126A (en) | 1989-04-20 | 1989-04-20 | Liquid level measuring apparatus |
| Country | Link |
|---|---|
| JP (1) | JPH02278126A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2367625A (en)* | 2000-05-20 | 2002-04-10 | Linburn Technology Ltd | Methods and apparatus for measuring the contents of liquid containers and the flow rate of liquids dispensed from liquid containers |
| JP2009133863A (en)* | 2007-11-30 | 2009-06-18 | Niro-Plan Ag | Liquid level measuring device and liquid level measuring method for measuring liquid level of liquid food in tank |
| JP2010126243A (en)* | 2008-11-30 | 2010-06-10 | Nihon Tetra Pak Kk | Liquid level controlling apparatus |
| CN104296826A (en)* | 2013-07-15 | 2015-01-21 | 广东美的暖通设备有限公司 | Gas-liquid separator and liquid level measuring device and method thereof |
| CN104596612A (en)* | 2015-01-26 | 2015-05-06 | 中国科学院大气物理研究所 | Method and device for detecting liquid level and liquid capacity |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2367625A (en)* | 2000-05-20 | 2002-04-10 | Linburn Technology Ltd | Methods and apparatus for measuring the contents of liquid containers and the flow rate of liquids dispensed from liquid containers |
| JP2009133863A (en)* | 2007-11-30 | 2009-06-18 | Niro-Plan Ag | Liquid level measuring device and liquid level measuring method for measuring liquid level of liquid food in tank |
| JP2010126243A (en)* | 2008-11-30 | 2010-06-10 | Nihon Tetra Pak Kk | Liquid level controlling apparatus |
| CN104296826A (en)* | 2013-07-15 | 2015-01-21 | 广东美的暖通设备有限公司 | Gas-liquid separator and liquid level measuring device and method thereof |
| CN104596612A (en)* | 2015-01-26 | 2015-05-06 | 中国科学院大气物理研究所 | Method and device for detecting liquid level and liquid capacity |
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