JPH11211537A - Liquid level/dielectric constant sensor - Google Patents
Liquid level/dielectric constant sensorInfo
- Publication number
- JPH11211537A JPH11211537A JP10010115A JP1011598A JPH11211537A JP H11211537 A JPH11211537 A JP H11211537A JP 10010115 A JP10010115 A JP 10010115A JP 1011598 A JP1011598 A JP 1011598A JP H11211537 A JPH11211537 A JP H11211537A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- liquid level
- electrodes
- dielectric constant
- 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.)
- Withdrawn
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、円筒状で径の異
なる第１電極と第２電極とが同心で垂直に対向して配さ
れ、それら第１，第２電極間の静電容量より液位または
液体の誘電率を検出する液位・誘電率センサに関し、特
に液体中に存在するバリのような金属性のダスト（スク
ラッチと言う）が両電極間にひっかかって電気的に短絡
となるのを防止すると共に、組立容易で測定精度の良好
な構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a first electrode and a second electrode which are cylindrical and have different diameters are arranged concentrically and vertically opposed to each other. With regard to a liquid level / dielectric constant sensor for detecting the dielectric constant of a liquid or a liquid, in particular, metallic dust such as burrs present in the liquid (called a scratch) is caught between the two electrodes to cause an electrical short circuit. And a structure that is easy to assemble and has good measurement accuracy.
【０００２】[0002]
【従来の技術】従来のこの種の液位・誘電率センサ（リ
ファレンスセンサとも言う）を図３を参照して説明す
る。径の異なる複数の円筒状電極が垂直な軸線Ｌを共有
して等間隔に配列され、軸線Ｌと直交するピンサポート
１によって支持される。隣接する電極間には適宜にスペ
ーサ２が取付けられる。外側の電極から数えて奇数番の
電極３を第１電極、偶数番の電極４を第２電極と呼ぶ。
第１電極同士は配線５で、第２電極同士は配線６でそれ
ぞれ接続される。2. Description of the Related Art A conventional liquid level / dielectric constant sensor (also referred to as a reference sensor) will be described with reference to FIG. A plurality of cylindrical electrodes having different diameters are arranged at equal intervals while sharing a vertical axis L, and are supported by a pin support 1 orthogonal to the axis L. Spacers 2 are appropriately attached between adjacent electrodes. The odd-numbered electrodes 3 are referred to as first electrodes, and the even-numbered electrodes 4 are referred to as second electrodes, counting from the outer electrodes.
The first electrodes are connected by a wiring 5 and the second electrodes are connected by a wiring 6.
【０００３】最も外側の第１電極３は他の電極より板厚
が厚く、その両端にフランジ３ａ，３ｂが形成される。
この最外端の第１電極３はセンサのケースを兼用してい
る。第１電極３は測定部の高電圧／低インピーダンスの
入力端子に接続されるので低インピーダンス側の電極と
呼ばれ、それに対して第２電極が測定部の低電圧／高イ
ンピーダンスの入力端子に接続されるので高インピーダ
ンス側の電極と呼ばれる。The outermost first electrode 3 is thicker than the other electrodes, and flanges 3a and 3b are formed at both ends.
The outermost first electrode 3 also serves as a sensor case. The first electrode 3 is connected to the high-voltage / low-impedance input terminal of the measuring unit and is called an electrode on the low-impedance side, while the second electrode is connected to the low-voltage / high-impedance input terminal of the measuring unit. Therefore, it is called a high impedance side electrode.
【０００４】[0004]
【発明が解決しようとする課題】従来のセンサに関し次
のような問題点が指摘されていた。 液体中のスクラッチが電極間にひっかかって短絡不
良を起こす恐れがある。 多数の円筒状電極をピンサポート１を用いて一体に
組み立てる場合の作業性が極めて悪く、組立工数が多く
なる。The following problems have been pointed out with respect to the conventional sensor. Scratch in the liquid may be caught between the electrodes to cause a short circuit failure. The workability when assembling a large number of cylindrical electrodes integrally using the pin support 1 is extremely poor, and the number of assembling steps increases.
【０００５】 電極間にピンサポート１及びスペーサ
２が介在するため、測定精度が低下する。 この発明はこれらの問題を解決することを目的としてい
る。Since the pin support 1 and the spacer 2 are interposed between the electrodes, the measurement accuracy decreases. The present invention aims to solve these problems.
【０００６】[0006]
【課題を解決するための手段】（１）請求項１の発明
は、円筒状で径の異なる第１電極（径の最大の電極を含
む）と第２電極とが同心で垂直に対向して配され、それ
ら第１，第２電極間の静電容量より液位または液体の誘
電率を検出する液位・誘電率センサに関する。請求項１
では特に、前記第１電極または第２電極に液体中のダス
トを流通させるための小孔が分布形成される。(1) According to the first aspect of the present invention, a first electrode (including an electrode having the largest diameter) having a cylindrical shape and a different diameter and a second electrode are concentric and vertically opposed. The present invention relates to a liquid level / permittivity sensor for detecting a liquid level or a dielectric constant of a liquid from the capacitance between the first and second electrodes. Claim 1
In particular, small holes for distributing dust in the liquid to the first electrode or the second electrode are distributed and formed.
【０００７】（２）請求項２の発明は、前記（１）にお
いて、第１，第２電極は、それぞれの上端または下端が
金属製のアームで支持される。 （３）請求項３の発明は、前記（２）において、アーム
が上方より見て十字状に形成される。 （４）請求項４の発明は、前記（２）において、最外端
の第１電極の下端に複数の切り欠きが形成され、それら
の切り欠きに、第２電極を支持するアームの端部が絶縁
キャップを介して係合される。(2) In the second aspect of the present invention, in the above (1), each of the first and second electrodes is supported at its upper end or lower end by a metal arm. (3) In the invention according to claim 3, in (2), the arm is formed in a cross shape when viewed from above. (4) The invention according to claim 4, wherein in (2), a plurality of cutouts are formed at the lower end of the outermost first electrode, and the cutouts have end portions of an arm that supports the second electrode. Are engaged via the insulating cap.
【０００８】[0008]
【発明の実施の形態】この発明の実施例を図１，図２
に、図３と対応する部分に同じ符号を付けて示す。この
発明では、第１電極３及び第２電極４に、液体中のダス
トを流通させるための小孔２０が分布形成される。最外
端の第１電極の直径及び高さがそれぞれ約１０mmの場
合、液体の種類にもよるが、例えば直径２〜５mmの小孔
２０を１０〜２０mm間隔で形成する。このようにすると
ダストが小孔２０を自由に通り抜けるので、電極間に堆
積したり、ひっかかったりするのを防止できる。また、
第１，第２電極のいずれか一方だけに小孔２０を形成し
ても効果がある。1 and 2 show an embodiment of the present invention.
The same reference numerals as in FIG. 3 denote the same parts. In the present invention, the small holes 20 for circulating dust in the liquid are formed in the first electrode 3 and the second electrode 4 in a distributed manner. When the diameter and height of the outermost first electrode are each about 10 mm, for example, small holes 20 having a diameter of 2 to 5 mm are formed at intervals of 10 to 20 mm, depending on the type of liquid. In this way, dust freely passes through the small holes 20, so that it is possible to prevent the dust from being deposited or caught between the electrodes. Also,
It is effective to form the small holes 20 in only one of the first and second electrodes.
【０００９】第１電極３は図２Ａに示すようにその上端
が金属製のアーム７に固定され、そのアーム７により支
持される。また第２電極４は図２Ｂに示すようにその下
端がアーム８に固定され、そのアーム８により支持され
る。図１の例では、アーム７，８は上方より見て十字状
に形成されている。このようにすると、第１電極３及び
第２電極４は９０°間隔でアーム７及び８でそれぞれ安
定に支持される。そのため電極間にスペーサを挿入する
必要がない。The upper end of the first electrode 3 is fixed to a metal arm 7 as shown in FIG. 2A, and is supported by the arm 7. The lower end of the second electrode 4 is fixed to the arm 8 as shown in FIG. 2B, and is supported by the arm 8. In the example of FIG. 1, the arms 7, 8 are formed in a cross shape when viewed from above. Thus, the first electrode 3 and the second electrode 4 are stably supported by the arms 7 and 8 at 90 ° intervals. Therefore, there is no need to insert a spacer between the electrodes.
【００１０】図１の例では外側の第１電極３の上端及び
下端の外周に上フランジ部１１及び下フランジ部１２が
それぞれ嵌合、固定される。センサを組み立てるには、 アーム８で支持された第２電極４をアーム７で支持
された第１電極３の下端より挿入し、アーム８の突端に
被された絶縁キャップ１３を最外端の第１電極３の下端
に形成された切り欠き（４箇所）３ａに係合させる。In the example of FIG. 1, an upper flange portion 11 and a lower flange portion 12 are fitted and fixed to the outer periphery of the upper and lower ends of the outer first electrode 3, respectively. To assemble the sensor, the second electrode 4 supported by the arm 8 is inserted from the lower end of the first electrode 3 supported by the arm 7, and the insulating cap 13 covered by the protruding end of the arm 8 is attached to the outermost end. One electrode 3 is engaged with notches (four places) 3a formed at the lower end.
【００１１】 最外端の第１電極３の上端及び下端に
上フランジ部１１及び下フランジ部１２をそれぞれ嵌合
させ、例えばねじで固定する。絶縁キャップ１３は下フ
ランジ部１２のフランジで抑えられる。これまでの説明
では、第１，第２電極はそれぞれ同心に配された複数の
電極より成るものとしたが、この発明はこの場合に限ら
ず、それぞれが１個の電極であってもよい。An upper flange portion 11 and a lower flange portion 12 are fitted to the upper end and the lower end of the outermost first electrode 3, respectively, and are fixed with, for example, screws. The insulating cap 13 is held down by the flange of the lower flange 12. In the description so far, the first and second electrodes are each constituted by a plurality of electrodes arranged concentrically, but the present invention is not limited to this case, and each may be one electrode.
【００１２】[0012]
【発明の効果】 この発明では、第１電極３または第
２電極４に液体中のダストが流通できる小孔２０を分布
形成したので、ダストが電極間に堆積したり、つまった
りすることによる短絡不良を防止できる。 アーム７，８でそれぞれ支持された第１，第２電極
を互いに嵌合させ、アーム８の先端の絶縁キャップ１３
を最外端の第１電極の下端の切り欠き３ａに係合させる
ことによって組み立てられるので、組立の作業性が頗る
よく、組立工数を縮減できる。According to the present invention, the small holes 20 through which the dust in the liquid can flow are formed in the first electrode 3 or the second electrode 4 in a distributed manner. Therefore, the short-circuit due to the accumulation or clogging of the dust between the electrodes. Failure can be prevented. The first and second electrodes respectively supported by the arms 7 and 8 are fitted to each other, and the insulating cap 13 at the tip of the arm 8 is fitted.
Is engaged with the notch 3a at the lower end of the outermost first electrode, the workability of the assembly is extremely good, and the number of assembly steps can be reduced.
【００１３】 従来のように第１，第２電極間にピン
サポートやスペーサが介在しないので、これらの介在に
よる測定精度の低下を防止できる。Since no pin support or spacer is interposed between the first and second electrodes as in the related art, it is possible to prevent a decrease in measurement accuracy due to the interposition of the pin support and the spacer.
【図１】この発明の実施例を示す図で、Ａは正面図、Ｂ
は平面図、Ｃは底面図。FIG. 1 is a view showing an embodiment of the present invention, wherein A is a front view, and B is
Is a plan view, and C is a bottom view.
【図２】Ａ及びＢは図１のａ部及びｂ部をそれぞれ拡大
して示した断面図。FIGS. 2A and 2B are enlarged cross-sectional views of portions a and b of FIG.
【図３】Ａ及びＢは従来の液位・誘電率センサのそれぞ
れ平面図及び断面図。3A and 3B are a plan view and a cross-sectional view of a conventional liquid level / dielectric constant sensor, respectively.
Claims (4)
の電極を含む）と第２電極とが同心で垂直に対向して配
され、それら第１，第２電極間の静電容量より液位また
は液体の誘電率を検出する液位・誘電率センサにおい
て、 前記第１電極または第２電極に流体中のダストを流通さ
せるための小孔が分布形成されていることを特徴とする
液位・誘電率センサ。A cylindrical first electrode (including an electrode having the largest diameter) and a second electrode having different diameters are arranged concentrically and vertically opposed to each other, and an electrostatic capacitance between the first and second electrodes is provided. In a liquid level / dielectric constant sensor for detecting a liquid level or a dielectric constant of a liquid from a capacity, small holes for allowing dust in a fluid to flow through the first electrode or the second electrode are formed. Liquid level and dielectric constant sensor.
は、それぞれの上端または下端が金属製のアームで支持
されていることを特徴とする液位・誘電率センサ。2. The liquid level / permittivity sensor according to claim 1, wherein each of the first and second electrodes has an upper end or a lower end supported by a metal arm.
り見て十字状に形成されていることを特徴とする液位・
誘電率センサ。3. The liquid level according to claim 2, wherein said arm is formed in a cross shape when viewed from above.
Permittivity sensor.
下端に複数の切り欠きが形成され、それらの切り欠き
に、前記第２電極を支持する前記アームの端部が絶縁キ
ャップを介して係合されていることを特徴とする液位・
誘電率センサ。4. The device according to claim 2, wherein a plurality of cutouts are formed at a lower end of the outermost first electrode, and an end of the arm supporting the second electrode is provided with an insulating cap in the cutouts. Liquid level characterized by being engaged via
Permittivity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10010115A JPH11211537A (en) | 1998-01-22 | 1998-01-22 | Liquid level/dielectric constant sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10010115A JPH11211537A (en) | 1998-01-22 | 1998-01-22 | Liquid level/dielectric constant sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11211537A true JPH11211537A (en) | 1999-08-06 |
Family
ID=11741318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10010115A Withdrawn JPH11211537A (en) | 1998-01-22 | 1998-01-22 | Liquid level/dielectric constant sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11211537A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009085495A1 (en) * | 2007-12-28 | 2009-07-09 | Freescale Semiconductor Inc. | Liquid level sensing device and method |
| JP6093072B1 (en) * | 2016-06-10 | 2017-03-08 | 一般社団法人日本海事検定協会 | Moisture meter |
| CN110864763A (en) * | 2019-11-27 | 2020-03-06 | 西安维米克自控仪表技术有限公司 | Glass liquid level meter |
-
1998
- 1998-01-22 JP JP10010115A patent/JPH11211537A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009085495A1 (en) * | 2007-12-28 | 2009-07-09 | Freescale Semiconductor Inc. | Liquid level sensing device and method |
| US7802471B2 (en) | 2007-12-28 | 2010-09-28 | Sieh Philip J | Liquid level sensing device and method |
| JP6093072B1 (en) * | 2016-06-10 | 2017-03-08 | 一般社団法人日本海事検定協会 | Moisture meter |
| JP2017219493A (en) * | 2016-06-10 | 2017-12-14 | 一般社団法人日本海事検定協会 | Moisture meter |
| CN110864763A (en) * | 2019-11-27 | 2020-03-06 | 西安维米克自控仪表技术有限公司 | Glass liquid level meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH05322629A (en) | Electrostatic level sensor | |
| WO2013015219A1 (en) | Shunt resistance device | |
| US2950426A (en) | Capacitor for conductive liquids | |
| NL8800711A (en) | CONDENSER OF THE COAXIAL TYPE FOR A PULSE GENERATOR. | |
| CN100422707C (en) | Capacitive sensor | |
| CN105044763B (en) | A kind of turnover beam divergence angle traverse measurement mechanism | |
| JPH11211537A (en) | Liquid level/dielectric constant sensor | |
| US3103002A (en) | Capacitive fluid level sensing apparatus | |
| JPH11194047A (en) | Liquid level/dielectric constant sensor | |
| CN208507976U (en) | Monitor component and power supply device | |
| JP2014081257A (en) | Sensor device | |
| US6396678B1 (en) | Capacitor | |
| US2387365A (en) | System of tubular electrodes | |
| JPH11201803A (en) | Electrostatic capacity type multi-stage liquid level sensor | |
| CN214476705U (en) | Novel 800kV dry-type wall bushing | |
| JP3307460B2 (en) | Insulation paint drawing equipment | |
| JPH045001Y2 (en) | ||
| JP2005274481A (en) | Fluid level detecting device | |
| JPH0221865B2 (en) | ||
| JP2905028B2 (en) | Jumper device | |
| JPS6195214A (en) | Electrostatic-capacity type fuel gauge for vehicle | |
| SU1107656A1 (en) | Standard of loss tangent unit | |
| JPH0215245Y2 (en) | ||
| KR830000283Y1 (en) | Voltage detector for gas or liquid insulated high voltage switchgear | |
| JPH0620545A (en) | Bushing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050405 |