JPS59126919A - Liquid level detecting apparatus - Google Patents
Liquid level detecting apparatusInfo
- Publication number
- JPS59126919A JPS59126919A JP163683A JP163683A JPS59126919A JP S59126919 A JPS59126919 A JP S59126919A JP 163683 A JP163683 A JP 163683A JP 163683 A JP163683 A JP 163683A JP S59126919 A JPS59126919 A JP S59126919A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- communication pipe
- float
- magnetic float
- liquid
- 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
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
- G01F23/74—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電気ジャーポット、電気温水器などの液体容器
に設けた容器中の液面検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid level detection device provided in a liquid container such as an electric jar pot or an electric water heater.
従来、液体容器の底部に連通ずる連通管内に所要の浮力
をもつ磁性体浮子を入れ、これを空心トランスコイルを
用いて検知することにより液面を検出することが行われ
ている。しかしながら浮子の位置が液面のゆれの影響を
受けたり。Conventionally, the liquid level has been detected by inserting a magnetic float having a required buoyancy into a communication pipe communicating with the bottom of a liquid container, and detecting this using an air-core transformer coil. However, the position of the float may be affected by fluctuations in the liquid level.
空心トランスコイルを連続して配置した場合。When air-core transformer coils are arranged in succession.
浮子が各空心トランスコイルの中間点に位置したとき、
検知レベルが低下し１表示器を誤動作させる欠点があシ
、誤動作なく表示器を駆動す変化があっても正確な動作
をし液面を連続的に検知する液面検出装置を提供するこ
とを目的とする。When the float is located at the midpoint of each air-core transformer coil,
It is an object of the present invention to provide a liquid level detection device that operates accurately even when there are changes and continuously detects the liquid level. purpose.
本発明は１発振器と、液面の変化に従って移動しうる浮
力を有する磁性体浮子と、上記発振器出力を一次巻線に
印加する空心トランスコイルと、液量を表示する表示器
とを含む液面検出装置において、液体容器の底部に連通
ずる連通管内に、上記磁性体浮子を嵌入すると共にその
上動または下動を制限する透水性の仕切部材を設け、連
通管の外周の所要の位置に上記空心トランスコイルを配
置した液面検出装置である。The present invention provides a liquid level that includes an oscillator, a magnetic float having buoyancy that can move according to changes in the liquid level, an air-core transformer coil that applies the output of the oscillator to a primary winding, and an indicator that displays the liquid level. In the detection device, a water-permeable partition member is provided in a communication pipe that communicates with the bottom of the liquid container to fit the magnetic float and restrict its upward or downward movement, and the above-mentioned magnetic float is provided at a required position on the outer periphery of the communication pipe. This is a liquid level detection device equipped with an air-core transformer coil.
以下本発明の１実施例を図面について説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１は電気ジャーポット、電気温水器な
どの図示しないタンクの底部に連通して容器の外側に設
けた連通管である。この連通管１の内壁に、ｉ量が空に
近づいた所定少量の液面位置と、所定少量より多い一定
残朧の液面位置とに、液体を通過させるが浮子（後述）
を通さない透水性仕切部材２０ 、２１例えば多数の貫
通小孔を穿設した仕切板をそれぞれ設け。In FIG. 1, reference numeral 1 denotes a communication pipe provided on the outside of the container and communicating with the bottom of a tank (not shown) of an electric jar pot, electric water heater, or the like. The liquid is passed through the inner wall of this communication pipe 1 at a liquid level position of a predetermined small amount where the amount i approaches empty, and at a liquid level position where a constant amount of residual water is larger than the predetermined amount.
The water-permeable partition members 20 and 21 are each provided with a partition plate having a large number of through holes, for example.
前記連通管１内の仕切部材２０の下方に液面の変化にし
たがって移動しつる浮力をもつ磁性体浮子（例えば強磁
性体を発泡体で嗟ったもの）３０を嵌入し、仕り部材２
０と２１の開にも同様な磁性体浮子３１を嵌入している
。連通管１の外周には仕切部材２０．２１の下面に浮子
３０．３１が当接しているときの位置に対応して空心の
トランスコイル４０．４１ ｉ設置している。４０ａ。A magnetic float (for example, a ferromagnetic material made of foam) 30 is fitted below the partition member 20 in the communication pipe 1 and has a buoyant force that moves according to changes in the liquid level.
A similar magnetic float 31 is also fitted in the holes 0 and 21. An air-core transformer coil 40.41i is installed on the outer periphery of the communication pipe 1 in a position corresponding to the position when the float 30.31 is in contact with the lower surface of the partition member 20.21. 40a.
４０ｂ、４１ａ、４１ｂはトランスコイル４Ｑ、４１の
それぞれ１次端子全示し、 ４０ｃ、４０ｄ、４１ｃ、
４１ｄはトランスコイル４０．４１のそれぞれ２次端子
を示す。40b, 41a, 41b indicate all primary terminals of transformer coils 4Q, 41, respectively; 40c, 40d, 41c,
41d indicates secondary terminals of the transformer coils 40 and 41, respectively.
第２図は本装置に使用する回路図の一例を示す。トラン
スコイル４０．４１の１次端子４０ａ。FIG. 2 shows an example of a circuit diagram used in this device. Primary terminal 40a of transformer coil 40.41.
４０ｂ、４１ａ、４１ｂは抵抗Ｒ，，Ｒ２とバッファと
してのインバータＩＮＶ１ 、 ＩＮＶ２ ’！ｒそれ
ぞれ介して発振部Ｏ８ＣＡに接続されており、磁性体浮
子３０．３１の変位によるトランスコイル４０．４１の
インピーダンス変化に対して、各トランスの２次側出力
は互いに独立して変化する。40b, 41a, 41b are resistors R,, R2 and inverters INV1, INV2'! as buffers. The secondary outputs of each transformer change independently from each other in response to a change in impedance of the transformer coil 40.41 due to displacement of the magnetic float 30.31.
トランスコイル４０．４１の２次側には２次側出力が所
定値よシ犬か小力）を検出するトランジスタｑ、、Ｑ２
’ｔそれぞれ設けている。アンド回路ＡＮＤ１．ＡＮＤ
２．ノア回路Ｎ０ＲＩ、インバータＩＮＶ３はトランジ
スタＱｌ、Ｑ２の出力に応じて発光ダイオードＬＥＤＩ
、 ＬＥＤ２． ＬＥＤ３を点灯させる駆動信号発生回
路を構成する。ＬＥＤｉｌ’ｌ：液量が空であること、
ＬＥＤ２は液量が空に近いこと。On the secondary side of the transformer coils 40 and 41, there are transistors q, , Q2 that detect whether the secondary output is a predetermined value or a small force.
't each provided separately. AND circuit AND1. AND
2. The NOR circuit N0RI and the inverter INV3 turn on the light emitting diode LEDI according to the outputs of the transistors Ql and Q2.
, LED2. A drive signal generation circuit for lighting the LED 3 is configured. LEDil'l: The liquid level is empty,
LED2 indicates that the liquid level is almost empty.
ＬＥＤ３は液量が空に近い状態より多いことをそれぞれ
表示するための発光ダイオードである。The LEDs 3 are light emitting diodes for indicating that the liquid level is higher than the near-empty state.
次に本発明の詳細な説明する。Next, the present invention will be explained in detail.
先ず、液量が十分にあり液面が仕切部材２１より上にあ
るとすると、浮子３０，３１ｆｄ第１図に示すようにそ
れぞれ仕切板２０．２１によって浮上を止められた状態
にあシ、トランスコイル４０゜４１の位置にある。トラ
ンスコイル４０．４１ Ｕ芯部に磁性体を含む浮子３０
．３１がそれぞれ存在するため、第２図の抵抗Ｒ３，Ｒ
４でそれぞれ終端された２次側の４０ｃ、４０ｄ、４１
ｃ、４１ｄにはそれぞれ高い端子電圧が得られる。この
端子電圧は。First, assuming that the liquid level is sufficient and the liquid level is above the partition member 21, the floats 30 and 31fd are in a state where their floating is stopped by the partition plates 20 and 21, respectively, as shown in FIG. The coil is located at 40°41. Transformer coil 40.41 Float 30 containing magnetic material in U core
．． 31, the resistors R3 and R in FIG.
40c, 40d, 41 on the secondary side each terminated in
A high terminal voltage can be obtained at each of terminals c and 41d. This terminal voltage is.
それぞれトランジスタＱｌ、Ｑ２のベース・エミッタ間
に印カロされ、それらのベース・エミッタ間しきｒ電圧
を越えるように設定されているめでこれによりＱ、、Ｑ
２のコレクタ電位はアース電位に対していずれもロウレ
ベルになる。この２つの入力がノアゲー） Ｎ０Ｒ１に
入力されるので。A voltage is applied between the base and emitter of transistors Ql and Q2, respectively, and is set to exceed the r voltage between their bases and emitters.
The collector potentials of No. 2 are both at a low level with respect to the ground potential. These two inputs are input to N0R1 (Noah game).
ノアゲー）ＮＯＲ１の出力はアース電位に対してハイレ
ベルであり、一定残量があることを示す発光ダイオード
ＬＥＤ３が点灯する。このときアンドゲートＡＮＤ１
、 ＡＮＤ２の出力はアース電位に対しロウレベルであ
るので１発光ダイオードＬＥＤＩ 、 ＬＥＤ２はいず
れも点灯しない。The output of NOR1 is at a high level with respect to the ground potential, and the light emitting diode LED3 lights up to indicate that there is a certain amount of power remaining. At this time, AND gate AND1
Since the output of AND2 is at a low level with respect to the ground potential, neither the first light emitting diode LEDI nor LED2 lights up.
次に液量が減少し、浮子６１がトランスコイル４１より
下方の位置にあったとする。この場合トランスコイル４
１は空心トランスとなるため２次側の４１ｃ、４１ｄ端
子にはごく低いレベルの端子電圧しか発生せずトランジ
スタＱ２のベース・エミッタ間しきい電圧を越えないの
で、トランジスタＱ２はオフであり、コレクタ電位はア
ース電位に対してノ・イレベルになる。一方、浮子６０
は依然としてトランスコイル４０の位置にあるのでトラ
ンジスタＱ、はオンであり、コレクタ電位はアースレベ
ルに対してロウレベルである。この２つの異なるレベル
がノアゲー） ＮＯＲＩに入力されるので、ノアゲー）
ＮＯＲＩの出力はアース電位に対しロウレベルとなシ発
光ダイオードＬＥＤ３が消灯する。アントゲ−）ＡＮＤ
ｌの出力もアース電位に対してロウレベルであるので発
光ダイオードＬＥＤ １は点灯しない。アントゲ−）Ａ
ＮＤ２にはトランジスタＱ２の７１イレベルの信号と、
インバータＩＮＶ３で反転されてノ・イレベルとなる信
号とが入力されるので、アンドゲートＡＮＤ２の出力は
アース電位に対しノ・イレベルであり、液量が空に近づ
いたことを表示する発光ダイオードＬＥＤ ２が点灯す
る。この点灯状態は浮子６１が第１図に鎖線で示すよう
に仕切部材２０の上面に当接するまで維持される。Next, it is assumed that the liquid volume decreases and the float 61 is located below the transformer coil 41. In this case, transformer coil 4
Since 1 is an air-core transformer, only a very low level of terminal voltage is generated at the secondary side terminals 41c and 41d and does not exceed the base-emitter threshold voltage of transistor Q2, so transistor Q2 is off and the collector The potential is at a level with respect to ground potential. On the other hand, float 60
Since Q is still at the position of the transformer coil 40, the transistor Q is on and the collector potential is at a low level with respect to the ground level. These two different levels are input into NORI (Noah game)
When the output of NORI is at a low level with respect to the ground potential, the light emitting diode LED3 is turned off. anime) AND
Since the output of 1 is also at a low level with respect to the ground potential, the light emitting diode LED 1 does not light up. anime) A
ND2 has the 71-level signal of transistor Q2,
Since the signal that is inverted by the inverter INV3 and becomes the NO level is input, the output of the AND gate AND2 is at the NO level with respect to the ground potential, and the light emitting diode LED 2 indicates that the liquid level is close to empty. lights up. This lighting state is maintained until the float 61 comes into contact with the upper surface of the partition member 20 as shown by the chain line in FIG.
さらに液量が減り、浮子６０がトランスコイル４０の位
置から外れ下方に位置した場合、トランスコイル４０．
４１が共に空芯トランスとなるため、トランジスタＱｌ
、Ｑ２はいずれもオフである。これにより両トランジス
タＱ、、Ｑ２のコレクタ電位はアース電位に対してノ１
イレベルになり。If the liquid level further decreases and the float 60 is removed from the position of the transformer coil 40 and positioned below, the transformer coil 40.
41 are both air core transformers, so the transistor Ql
, Q2 are all off. As a result, the collector potential of both transistors Q, , Q2 is at a level of 1 with respect to the ground potential.
Become level.
アントゲ−）ＡＮＤｌの出力はアース電位に対しハイレ
ベルであり、液量が空であることを示す発光ダイオード
ＬＥＤ １が点灯する。このときアンドゲートＡＮＤ２
にはトランジスタＱ、のハイレベ）Ｄ信号がインバータ
ＩＮＶ３により反転されて入力されるので、その出力は
アース電位に対してロウレベルであり、ノアゲートＮ０
Ｒ１の出力はアース電位に対しロウルベルとなるので９
発光ダイオードＬＥＤ２． ＬＥＤ３はいずれも点灯し
ない。第６図（ａ）（ｂ）（ｃ） （ｄ）は第１図とは
仕切部材２゜トランスコイル４の配置位置は異なるが、
第２図の回路に接続して第１図の場合と同様に液面が一
定以上にあること、空に近いこと、空の状態にあること
を検出することができる。The output of ANDl is at a high level with respect to the ground potential, and the light emitting diode LED 1 lights up, indicating that the liquid level is empty. At this time, AND gate AND2
Since the high level (high level) D signal of the transistor Q is inverted and inputted to the inverter INV3, its output is at a low level with respect to the ground potential, and the NOR gate N0
The output of R1 becomes a low level with respect to the ground potential, so 9
Light emitting diode LED2. None of the LEDs 3 lights up. 6(a), (b), (c), and (d) are different from those in FIG. 1 in the arrangement position of the partition member 2° and the transformer coil 4, but
By connecting to the circuit shown in FIG. 2, it is possible to detect whether the liquid level is above a certain level, near empty, or empty, as in the case shown in FIG. 1.
本発明によれば液面を連続的に検知し、誤動作のない正
確な液面検出装置が得られ９表示器を駆動する回路が簡
単でよく安価に作ることができる利点もある。According to the present invention, it is possible to obtain an accurate liquid level detection device that continuously detects the liquid level and is free from malfunctions, and also has the advantage that the circuit for driving the display 9 can be made simply and inexpensively.
一゛−゛ 〜− −ゝ や1゛−゛ 〜− −ゝ
第１図（は本発明による液面検出装置の連通管部分の一
実施例を示す一部破断正面図、第２図は一実施例の回路
図、第６図（ａ）〜（ｄ）は連通管音５分の他の実施例
を示す正面図である。
図において
１：連通管、 ２，２０．２１ ：透水性仕切部Ａシ。
ろ、３０．３１ ：磁性体浮子、 ４，４０，４１ ：
トランスコイル、 ＩＮＶ１〜ＩＮＶ３：インノく
一タ＋ ”Ｉ〜Ｒ９：抵抗、 ｑ、、Ｑ２： ）ラン
ジスク、ｃ、、ｃ、、：コンデンサ、 ＡＮＤＩ、 Ａ
ＮＤ２ ：アンドゲー）、Ｎ０Ｒ１：ノアゲート、
ＬＥＤＩ、 ＬＥＤ２． ＬＥＤ３ ：発光夕゛イ馬３
（α）（ｂ）
／１
図
（Ｃ） （ｄ）FIG. 1 (is a partially cutaway front view showing one embodiment of the communication pipe portion of the liquid level detection device according to the present invention, FIG. 2 is a circuit diagram of one embodiment, and FIGS. 6(a) to (d) are It is a front view showing another example of communication pipe sound for 5 minutes. In the figure, 1: communication pipe, 2, 20.21: water permeable partition part A, 30.31: magnetic float, 4, 40 ,41:
Transformer coil, INV1 to INV3: Inno Kuita + "I to R9: Resistor, q, , Q2: ) Ranjisk, c, , c, ,: Capacitor, ANDI, A
ND2: And Game), N0R1: Noah Gate,
LEDI, LED2. LED3: Light emitting light 3 (α) (b) /1 Figure (C) (d)
Claims (1)
と、上記発振器出力を一次巻線に印加する空心トランス
コ・ｒルと、該トランスコイルの二次巻線に接続されて
液量を表示する表示器とを含む液面検出回路において、
液体容器の底部に連通ずる連通管内に、前記磁性体浮子
を嵌入すると共にその上動または下動を制限する透水性
の仕切部材を設け、前記連通管の外周の所要の位置に上
記空心トランスを配置したことを特徴とする液面検出装
置。1. An oscillator, a magnetic float that floats according to changes in the i-plane, an air-core transformer coil that applies the output of the oscillator to the primary winding, and is connected to the secondary winding of the transformer coil to display the liquid level. In a liquid level detection circuit including an indicator,
A water-permeable partition member for fitting the magnetic float and restricting its upward or downward movement is provided in a communication pipe communicating with the bottom of the liquid container, and the air core transformer is placed at a required position on the outer periphery of the communication pipe. A liquid level detection device characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP163683A JPS59126919A (en) | 1983-01-11 | 1983-01-11 | Liquid level detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP163683A JPS59126919A (en) | 1983-01-11 | 1983-01-11 | Liquid level detecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59126919A true JPS59126919A (en) | 1984-07-21 |
Family
ID=11507012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP163683A Pending JPS59126919A (en) | 1983-01-11 | 1983-01-11 | Liquid level detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59126919A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6295426A (en) * | 1985-10-22 | 1987-05-01 | Tokyo Keiso Kk | Magnetic flux type liquid level gauge |
| JP2010517008A (en) * | 2007-01-19 | 2010-05-20 | ケイエスアール テクノロジーズ カンパニー | Inductive position sensor using reference signal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4811869B1 (en) * | 1968-05-10 | 1973-04-16 |
-
1983
- 1983-01-11 JP JP163683A patent/JPS59126919A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4811869B1 (en) * | 1968-05-10 | 1973-04-16 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6295426A (en) * | 1985-10-22 | 1987-05-01 | Tokyo Keiso Kk | Magnetic flux type liquid level gauge |
| JP2010517008A (en) * | 2007-01-19 | 2010-05-20 | ケイエスアール テクノロジーズ カンパニー | Inductive position sensor using reference signal |
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