JPH0344252B2 - - Google Patents
Info
- Publication number
- JPH0344252B2 JPH0344252B2 JP59048491A JP4849184A JPH0344252B2 JP H0344252 B2 JPH0344252 B2 JP H0344252B2 JP 59048491 A JP59048491 A JP 59048491A JP 4849184 A JP4849184 A JP 4849184A JP H0344252 B2 JPH0344252 B2 JP H0344252B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- segment
- electrodes
- electrode base
- segment electrode
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 12
- 238000005259 measurement Methods 0.000 description 9
- 239000011162 core material Substances 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 239000000295 fuel oil Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000007639 printing Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、静電容量式液面計に適した電極構造
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electrode structure suitable for a capacitive liquid level gauge.
（従来技術）
地下タンク等に収容された燃料油量の残量は、
タンクの上部から底部に亘る長さを持つた同軸状
の電極からなる静電容量測定棒を用い、この電極
の静電容量が液面レベルに比例して変化すること
を利用して測定されている。(Prior art) The remaining amount of fuel oil stored in underground tanks, etc.
It is measured using a capacitance measurement rod consisting of a coaxial electrode that extends from the top to the bottom of the tank, and takes advantage of the fact that the capacitance of this electrode changes in proportion to the liquid level. There is.
ところで、タンクに収容されている燃料油は、
外気温度の影響を受けて誘電率が変化し易く、測
定値に大きな誤差を含むという不都合がある。 By the way, the fuel oil stored in the tank is
There is a disadvantage that the dielectric constant easily changes due to the influence of the outside temperature, and the measured value includes a large error.
このような不都合を解消するため、第７図に示
したように液深測定電極を上下方向に複数に分割
してセグメント電極A1〜A5を形成し、電極の切
れ目B1〜B4に合せてフロートスイツチLS1〜LS4
を設けたデイジタル・アナログ型の静電容量式液
面計が提案されている。 In order to eliminate this inconvenience, as shown in Fig. 7, the liquid depth measuring electrode is divided vertically into a plurality of segments to form segment electrodes A1 to A5 , and segments B1 to B4 are connected to the electrodes. Also float switch LS 1 ~ LS 4
A digital/analog type capacitive liquid level gauge has been proposed.
これによれば、フロートスイツチが配設されて
いる位置を基準レベルとして測定値を校正するこ
とができ、外気温度の変化による誤差を軽減する
ことができる。 According to this, it is possible to calibrate the measured value using the position where the float switch is disposed as a reference level, and it is possible to reduce errors caused by changes in outside temperature.
ところが、このような測定電極は、金属からな
る複数の円筒を絶縁性芯材に上下関係を持たせて
配設して製作するため、製造に手数を要してコス
トが掛るという問題があつた。 However, such measurement electrodes are manufactured by arranging multiple metal cylinders in a vertical relationship around an insulating core material, which poses a problem in that manufacturing is labor-intensive and costly. .
（目的）
本発明はこのような問題に鑑み、可撓性を持つ
た絶縁基板に複数のセグメント電極を形成し、こ
れを筒状に整形することにより、製造が容易な液
深測定電極を提供することを目的とする。(Purpose) In view of these problems, the present invention provides a liquid depth measuring electrode that is easy to manufacture by forming a plurality of segment electrodes on a flexible insulating substrate and shaping them into a cylindrical shape. The purpose is to
（構成）
そこで、以下に本発明の詳細を図示した実施例
に基づいて説明する。(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.
第１図は、本発明のセグメント電極基体８の第
１の実施例を示すものであつて、図中符号１は、
耐油性高分子材料をフイルム状に形成して可撓性
を持たせ、測定すべき液深範囲以上の長さの絶縁
基板で、表面には矩形状をなす複数の導電パター
ンを蒸着やエツチング技術（以下、これをプリン
ト技術と呼ぶ）により間隔２ａ〜２ｇをあけて設
けてセグメント電極３ａ〜３ｈを形成し、また裏
面には少なくともセグメント電極の数以上のリー
ド線４ａ〜４ｈが基板１の上端から下端に一直線
状にプリント技術により形成されている。これら
のセグメント電極３ａ〜３ｈは、いずれか１本の
リード線と対向する位置にスルーホール５ａ〜５
ｈを穿設してリード線に電気接続され、基板１上
部の引出端子６ａ〜６ｈに静電容値を伝達するよ
う構成されている。なお、表面に形成した電極パ
ターンとリード線パターンとの間で静電結合を防
止するため、絶縁基板は、静電結合を無視し得る
程度の厚さを保持するように構成されている。 FIG. 1 shows a first embodiment of the segment electrode base 8 of the present invention, and the reference numeral 1 in the figure is
An insulating substrate made of oil-resistant polymer material formed into a flexible film with a length longer than the liquid depth range to be measured, and multiple rectangular conductive patterns on the surface using vapor deposition or etching techniques. (hereinafter referred to as printing technology), the segment electrodes 3a to 3h are formed at intervals 2a to 2g, and on the back side, at least as many lead wires 4a to 4h as there are segment electrodes are provided at the upper end of the substrate 1. It is formed by printing technology in a straight line from the top to the bottom edge. These segment electrodes 3a to 3h have through holes 5a to 5 at positions facing any one lead wire.
h and is electrically connected to a lead wire, and is configured to transmit a capacitance value to the lead terminals 6a to 6h on the upper part of the board 1. Note that in order to prevent electrostatic coupling between the electrode pattern formed on the surface and the lead wire pattern, the insulating substrate is configured to have a thickness that allows the electrostatic coupling to be ignored.
第２図イ，ロは、本発明の測定電極基体の第２
の実施例を示すものであつて、フイルム状の絶縁
基板１の表面に上下方向に間隔を存して複数のセ
グメント電極３ａ〜３ｅと、これらの電極３ａ〜
３ｅの両側に２つのリード線パターン４a′〜４
e′及び４a′〜４e′を点対称となるようにグループ
化してプリント技術により形成し、一方のグルー
プをダミーとするようにしたものである。 Figures 2A and 2B show the second part of the measurement electrode base of the present invention.
This embodiment shows a plurality of segment electrodes 3a to 3e arranged vertically at intervals on the surface of a film-like insulating substrate 1, and these electrodes 3a to 3e.
Two lead wire patterns 4a' to 4 on both sides of 3e
e' and 4a' to 4e' are grouped point-symmetrically and formed by printing technology, and one group is used as a dummy.
この実施例によれば、各セグメント電極に作用
する漂遊容量を均一することができるばかりでな
く、絶縁基板を可及的に薄く形成してもリード線
を介してセグメント電極同士が静電結合する虞れ
がなく、さらに導電パターンの形成を片面だけで
済ませることができ、製作工程の簡素化ができて
製造コストの引下げが可能となる。 According to this embodiment, not only can the stray capacitance acting on each segment electrode be made uniform, but also the segment electrodes can be electrostatically coupled to each other via the lead wires even if the insulating substrate is made as thin as possible. There is no risk, and the conductive pattern can be formed on only one side, which simplifies the manufacturing process and reduces manufacturing costs.
第３図は、上述のセグメント電極基体により構
成した本発明の測定電極の一実施例を示すもので
あつて、絶縁材料により形成した円筒状芯材７の
表面に上述したセグメント電極基体８をセグメン
ト電極側を表にして巻付け、外周表面を絶縁カバ
ー９により固定して筒状に整形して構成されてい
る。 FIG. 3 shows an embodiment of the measuring electrode of the present invention constituted by the above-mentioned segment electrode base, in which the above-mentioned segment electrode base 8 is attached to the surface of a cylindrical core material 7 made of an insulating material. It is constructed by winding it with the electrode side facing up, fixing the outer peripheral surface with an insulating cover 9, and shaping it into a cylindrical shape.
第４図は、この整形方法の一実施例を示すもの
であつて、絶縁性円筒体からなる芯材７の表面
に、基板の側部が重なり合わないようセグメント
電極３ａ〜３ｈの配列方向を軸にしてセグメント
電極基体８を巻付け（第４図）、これの外周に
弗素樹脂よりなる熱収縮チユーブ１０をかぶせ
（）、一端から他端に向けて熱源１１を移動させ
ながらチユーブ１０を徐々に加熱していくと、チ
ユーブ１０は、セグメント電極基体８を芯材７の
表面に縮め付けながら収縮して、セグメント電極
基体８を円筒状に形成する（）。これにより、
セグメント電極基体は、内側を芯材により補強さ
れ、外周を弗素樹脂により保護された円筒状の測
定電極体に形成される。 FIG. 4 shows an embodiment of this shaping method, in which the arrangement direction of the segment electrodes 3a to 3h is arranged on the surface of the core material 7 made of an insulating cylindrical body so that the sides of the substrate do not overlap. Wrap the segment electrode base 8 around the shaft (Fig. 4), cover the outer periphery of this with a heat-shrinkable tube 10 made of fluororesin (), and gradually tighten the tube 10 while moving the heat source 11 from one end to the other. When heated, the tube 10 shrinks while compressing the segment electrode base 8 onto the surface of the core material 7, forming the segment electrode base 8 into a cylindrical shape (). This results in
The segment electrode base is formed into a cylindrical measuring electrode body whose inner side is reinforced with a core material and whose outer periphery is protected with a fluororesin.
この実施例によれば複数のセグメント電極を形
成した可撓性絶縁基板を測定範囲に合せて切断
し、これを円筒状に整形することによりタンクの
サイズに応じた液深測定電極を簡単に形成するこ
とができる。 According to this example, a flexible insulating substrate on which a plurality of segment electrodes are formed is cut to fit the measurement range, and by shaping it into a cylindrical shape, it is easy to form liquid depth measurement electrodes according to the size of the tank. can do.
第５図は、上述の測定電極基体を用いた液深測
定電極棒の実施例を示すものであつて、図中符号
１２は、セグメント電極の切目に一致する箇所に
燃料油流入口１３，１３……を穿設した金属製パ
イプからなる共通電極で、下部に合成樹脂材料の
封止部材１４を設けて測定電極基体１５の下端を
固定し、上部に測定電極基体の各セグメント電極
からの静電容量値を周波数信号に変換するデータ
発振器１６をエポキシ樹脂等１７によりモールド
して収容し、上端に継手１８を設けて延長パイプ
１９を接続して構成されている。なお、図中符号
２０は、測定電極基体１５を共通電極１２に同軸
状に取付ける支持部材、２１はデータ発信器から
の出力をモニターに伝送するための測定ケーブル
をそれぞれ示している。 FIG. 5 shows an embodiment of a liquid depth measuring electrode using the above-mentioned measuring electrode base, and reference numeral 12 in the figure indicates fuel oil inlets 13, 13 at locations corresponding to the cuts of the segment electrodes. It is a common electrode made of a metal pipe with holes in it, a sealing member 14 made of a synthetic resin material is provided at the bottom to fix the lower end of the measurement electrode base 15, and the upper part is used to prevent static electricity from each segment electrode of the measurement electrode base. A data oscillator 16 that converts a capacitance value into a frequency signal is molded and housed in an epoxy resin 17, and a joint 18 is provided at the upper end to which an extension pipe 19 is connected. In the figure, reference numeral 20 indicates a support member for coaxially attaching the measurement electrode base 15 to the common electrode 12, and 21 indicates a measurement cable for transmitting the output from the data transmitter to the monitor.
第６図は、上述の液深測定電極棒を使用した燃
料油の残量測定装置の実施例を示すものであつ
て、図中符号２２は、地下タンクＴごとに垂設し
た上述の液深測定電極棒で、外周には、油流入口
つまりセグメント電極の切れ目のレベルに一致さ
せてフロートスイツチ２３，２３……を配設し、
液面レベルがセグメント電極の切れ目２ａ〜２ｇ
（第２図）を通過した時点で後述するモニター装
置２４に信号を出力するように構成されている。
２４は、前述の表示装置で、液深測定電極２２の
データ発信器１６（第５図）とフロートスイツチ
２３，２３……からの信号が測定ケーブル２５を
介して入力し、液面レベルや液量を表示するよう
に構成されている。 FIG. 6 shows an embodiment of a fuel oil remaining amount measuring device using the above-mentioned liquid depth measuring electrode, and the reference numeral 22 in the figure indicates the above-mentioned liquid depth measuring device vertically installed in each underground tank T. On the outer periphery of the measuring electrode rod, float switches 23, 23, etc. are arranged to match the level of the oil inlet, that is, the cut of the segment electrode,
The liquid level is between segment electrode cuts 2a to 2g.
(FIG. 2), it is configured to output a signal to a monitor device 24, which will be described later.
24 is the aforementioned display device, into which signals from the data transmitter 16 (Fig. 5) of the liquid depth measuring electrode 22 and the float switches 23, 23, . Configured to display the amount.
この実施例において、油面レベルが第３のセグ
メント電極内に位置している場合には、このセグ
メント電極の下端と油面までのレベルに比例した
静電容量値がリード線（第１，２図）を介してデ
ータ発信器に入力し、デイジタル信号に変換され
て表示装置により表示される。このようにして、
タンク内の燃料油が消費され液面レベルが低下す
ると、第３のフロートスイツチが作動し、液面が
第３と第４のフロートスイツチの切目に達したこ
とを検出して表示器に伝送する。これにより表示
器は、第４のセグメント電極からのデータに基づ
いてレベルを表示する。 In this example, when the oil level is located within the third segment electrode, the capacitance value proportional to the level between the lower end of this segment electrode and the oil level is the lead wire (first, second The data is inputted to the data transmitter via the data transmitter (see Figure), converted into a digital signal, and displayed on a display device. In this way,
When the fuel oil in the tank is consumed and the liquid level decreases, the third float switch is activated, detects that the liquid level has reached the threshold between the third and fourth float switches, and transmits the information to the display. . This causes the indicator to display the level based on the data from the fourth segment electrode.
なお、この実施例においては、セグメント電極
同士の切目と液面との一致をフロートとリミツト
スイツチにより検出しているが、セグメント電極
からの静電容量値を微分し、その不連続点から検
出してもよく、さらには、各セグメント電極にお
ける静電容量の最大値と最小値を予じめ測定して
おき、隣接する２つの電極がそれぞれ最大値と最
小値を示した時点を検出してもよい。 In this example, the match between the cut between the segment electrodes and the liquid level is detected using a float and a limit switch, but the capacitance value from the segment electrodes is differentiated and detected from the discontinuity point. Furthermore, the maximum and minimum values of capacitance in each segment electrode may be measured in advance, and the point in time when two adjacent electrodes exhibit the maximum and minimum values, respectively, may be detected. .
（効果）
以上説明したように本発明によれば、可撓性を
もつた絶縁基板の表面に矩形状の電極板を間隔を
あけて複数形成し、これを円筒状に整形したの
で、プリント配線技術が利用でき、低いコストで
寸法精度が高い液深測定電極を製作することがで
きるばかりでなく、刃物により切断することがで
きて設置場所に応じた寸法に簡単に加工すること
ができる。(Effects) As explained above, according to the present invention, a plurality of rectangular electrode plates are formed at intervals on the surface of a flexible insulating substrate, and these are shaped into a cylindrical shape. Not only can the technology be used to manufacture liquid depth measuring electrodes with high dimensional accuracy at low cost, but they can also be cut with a knife and easily processed into dimensions appropriate for the installation location.
第１図イ〜ハは、それぞれの本発明に使用する
セグメント電極基体の第１の実施例を示す正面
図、背面図、及び断面図、第２図イ，ロは、それ
ぞれ本発明に使用する第２のセグメント電極基体
の第２の実施例を示す正面図、及び断面図、第３
図は、本発明の一実施例を示す断面図、第４図
〜は、それぞれ同上基体を液深測定電極に形成
する工程を示す説明図、第５図は、第４図に示し
た液深測定電極により構成した液深測定電極棒の
一実施例を示す断面図、第６図は、第５図に示し
た液深測定電極により構成した液深測定装置の一
実施例を示す構成図、第７図は、セグメント電極
式液深測定電極棒の一例を示す正面図である。
１……可撓性絶縁基板、２ａ〜２ｇ……間隙、
３ａ〜３ｈ……セグメント電極、４ａ〜４ｈ，４
a′〜４h′……リード線、７……芯材、８……セグ
メント電極基体、９……絶縁カバー。
Figures 1A to 1C are a front view, a rear view, and a sectional view showing the first embodiment of the segment electrode base used in the present invention, and Figures 2A and 2B are respectively the first embodiment of the segment electrode base used in the present invention. A front view and a sectional view showing the second example of the second segment electrode base, the third
The figure is a cross-sectional view showing one embodiment of the present invention, FIGS. 6 is a cross-sectional view showing an example of a liquid depth measuring electrode rod configured with a measuring electrode; FIG. 6 is a configuration diagram showing an example of a liquid depth measuring device configured with the liquid depth measuring electrode shown in FIG. 5; FIG. 7 is a front view showing an example of a segment electrode type liquid depth measuring electrode rod. 1...Flexible insulating substrate, 2a to 2g...Gap,
3a to 3h...segment electrode, 4a to 4h, 4
a' to 4h'... Lead wire, 7... Core material, 8... Segment electrode base, 9... Insulating cover.
Claims (1)
たせて可撓性を有する絶縁基板に形成し、前記電
極の配列方向を軸として前記基板を円筒状に整形
してなる静電容量式液面計用電極。1. A capacitive liquid level gauge in which a plurality of segment electrodes are formed on a flexible insulating substrate at intervals in the vertical direction, and the substrate is shaped into a cylindrical shape with the direction in which the electrodes are arranged as an axis. electrode.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048491A JPS60192227A (en) | 1984-03-14 | 1984-03-14 | Electrode for electrostatic capacity type level gauge |
| US06/709,165 US4601201A (en) | 1984-03-14 | 1985-03-07 | Liquid level and quantity measuring apparatus |
| CA000476243A CA1223460A (en) | 1984-03-14 | 1985-03-11 | Liquid level and quantity measuring apparatus |
| ES541652A ES8608154A1 (en) | 1984-03-14 | 1985-03-13 | Liquid level and quantity measuring apparatus. |
| DE8585301714T DE3576199D1 (en) | 1984-03-14 | 1985-03-13 | MEASURING APPARATUS FOR LIQUID LEVEL AND QUANTITY OF LIQUID. |
| EP85301714A EP0155179B1 (en) | 1984-03-14 | 1985-03-13 | Liquid level and quantity measuring apparatus |
| DK115585A DK163380C (en) | 1984-03-14 | 1985-03-13 | APPLICATION FOR MEASURING LEVEL AND VOLUME |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048491A JPS60192227A (en) | 1984-03-14 | 1984-03-14 | Electrode for electrostatic capacity type level gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60192227A JPS60192227A (en) | 1985-09-30 |
| JPH0344252B2 true JPH0344252B2 (en) | 1991-07-05 |
Family
ID=12804853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59048491A Granted JPS60192227A (en) | 1984-03-14 | 1984-03-14 | Electrode for electrostatic capacity type level gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60192227A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009135358A (en) * | 2007-12-03 | 2009-06-18 | Shindengen Electric Mfg Co Ltd | Variable capacitor |
| GB0909510D0 (en) | 2009-06-03 | 2009-07-15 | Airbus Uk Ltd | Fuel level measurement apparatus and method |
-
1984
- 1984-03-14 JP JP59048491A patent/JPS60192227A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60192227A (en) | 1985-09-30 |
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