JPH0233139Y2 - - Google Patents
Info
- Publication number
- JPH0233139Y2 JPH0233139Y2 JP1983012153U JP1215383U JPH0233139Y2 JP H0233139 Y2 JPH0233139 Y2 JP H0233139Y2 JP 1983012153 U JP1983012153 U JP 1983012153U JP 1215383 U JP1215383 U JP 1215383U JP H0233139 Y2 JPH0233139 Y2 JP H0233139Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- electrode pattern
- liquid level
- positive electrode
- solvent
- 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
- 239000007788 liquid Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- -1 for example Polymers 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Description
【考案の詳細な説明】
本考案は、液面変位を計測する為に使用する抵
抗体に関し、特には耐電食性の良好な構造を備え
た液面計用抵抗体に関する。[Detailed Description of the Invention] The present invention relates to a resistor used to measure liquid level displacement, and more particularly to a resistor for a liquid level gauge having a structure with good electrolytic corrosion resistance.
従来の液面計用抵抗体は、固有抵抗値の高い燃
料油等を対象とするものであるので、一般的な使
用状態においては電食という問題を考慮する必要
性はなかつた。しかし、石油類の先行見通し等を
考慮した場合、アルコール燃料の如きものが見直
されて使用し始められている。このようなアルコ
ール燃料等は、その純度の高い状態の場合には高
固有抵抗値を有しているが、他面において水が溶
けやすく、その為に固有抵抗値の大幅な低下を起
こす恐れが充分にある。従つて、液面計のように
DC1V〜7Vという低電圧の印加であつても長期
間の使用においては、抵抗体のプラス電極とアー
ス電極間に微弱な数nA〜数百μA程度の電流が流
れてしまうので、抵抗体パターンが溶解し破損す
るという問題がある。 Since conventional resistors for liquid level gauges are intended for fuel oil and the like having a high specific resistance value, there is no need to consider the problem of electrolytic corrosion in general usage conditions. However, considering the outlook for petroleum fuels, alcohol fuels are being reconsidered and are beginning to be used. Such alcohol fuels have a high specific resistance value when they are in a high purity state, but on the other hand, they easily dissolve in water, which may cause a significant decrease in the specific resistance value. There is enough. Therefore, like a liquid level gauge
Even when a low voltage of 1V to 7V DC is applied, during long-term use, a weak current of several nA to several hundred μA will flow between the positive electrode and the ground electrode of the resistor, so the resistor pattern will change. There is a problem with melting and damage.
本考案は、このような事情を考慮して抵抗体の
耐久性を好適に高め得るようにした液面計用抵抗
体を提供するもので、その為に本考案によれば、
支持体上に形成される固有抵抗値の高い金属抵抗
体の表面に計測用接点の摺動範囲を除いて耐溶剤
性に富む絶縁性の樹脂を被着して、抵抗体表面の
露出部分を可及的に少なくするように構成されて
おり、また、更に抵抗体の耐久性を高める手段と
しては、上記の如く被覆された抵抗体の他に露出
したダミー抵抗体を設けて計測に寄与する抵抗体
を極力保護するように案出されている。 The present invention takes these circumstances into consideration and provides a resistor for a liquid level gauge that can suitably increase the durability of the resistor.
An insulating resin with high solvent resistance is coated on the surface of the metal resistor with high specific resistance formed on the support, except for the sliding range of the measurement contact, and the exposed part of the resistor surface is covered. The structure is designed to minimize the number of resistors, and as a means to further increase the durability of the resistor, an exposed dummy resistor is provided in addition to the coated resistor as described above to contribute to measurement. It is designed to protect the resistor as much as possible.
以下、図示の実施例によつて本考案を更に詳述
すると、第１図及び第２図は本考案の一方の実施
例を示し、図中、１は所要の長さを有する板状の
支持体であり、素材としては各種の絶縁材基材、
セラミツク板或いはアルミニウム等の金属板を用
いることができる。金属板を使用する場合には、
その表面を適当に電気絶縁処理しておく必要があ
る。このような支持体１の各面には図示の如く適
宜な接合層４を介して高固有抵抗値の金属抵抗体
としてのプラス電極パターン２とアース電極パタ
ーン３が必要な長さで形成されるが、第２図の断
面図のとおり、これら両パターン２，３は計測用
接点の摺動範囲５，６を除いてその表面を耐溶剤
性の絶縁性樹脂７で被覆されている。従つて、両
パターン２，３の露出部分は僅かな帯状ないしは
スリツト状のものとなり、最少限の接点摺動部分
だけとなる。耐溶剤性の絶縁性樹脂としては、例
えばポリアセタール樹脂、ポリエチレン樹脂、エ
ポキシ樹脂、ポリイミド樹脂、オレフイン樹脂又
はBT樹脂等を使用することができ、このような
樹脂を印刷、ラミネート或いは塗布等の手段で両
パターン２，３上に適宜コーテイング処理するこ
とができる。 Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIGS. 1 and 2 show one embodiment of the present invention, and in the figures, 1 indicates a plate-shaped support having a required length. The material is various insulating base materials,
A ceramic plate or a metal plate such as aluminum can be used. When using metal plates,
The surface must be appropriately electrically insulated. On each surface of such a support 1, a positive electrode pattern 2 and a ground electrode pattern 3 as a metal resistor with a high specific resistance value are formed with a required length through an appropriate bonding layer 4 as shown in the figure. However, as shown in the cross-sectional view of FIG. 2, the surfaces of both patterns 2 and 3 are coated with a solvent-resistant insulating resin 7, except for the sliding ranges 5 and 6 of the measurement contacts. Therefore, the exposed portions of both patterns 2 and 3 have a slight band-like or slit-like shape, and there is only a minimum sliding contact portion. As the solvent-resistant insulating resin, for example, polyacetal resin, polyethylene resin, epoxy resin, polyimide resin, olefin resin, BT resin, etc. can be used, and such resin can be used by printing, laminating, coating, etc. Both patterns 2 and 3 can be appropriately coated.
上記構造の液面計用抵抗体によれば、計測に寄
与する抵抗体としてのプラス電極パターン２及び
アース電極パターン３の大部分を耐溶剤性の絶縁
性樹脂７で被覆してあるので、電食によるパター
ンの損傷度を可及的に阻止して抵抗体の耐久性を
良好に向上させるものとなる。 According to the resistor for a liquid level gauge having the above structure, since most of the positive electrode pattern 2 and the ground electrode pattern 3, which serve as resistors that contribute to measurement, are covered with solvent-resistant insulating resin 7, the The degree of damage to the pattern due to corrosion is suppressed as much as possible, and the durability of the resistor is improved.
第３図及び第４図は、本考案の他の実施例を示
し、これは上記の如く被覆処理した抵抗体におい
て、プラス電極パターン２とは別にそれに近接し
てダミー電極パターン８を露出するように形成し
たものである。この構造の抵抗体によれば、ダミ
ー電極パターン８とアース電極パターン３との間
で先ず電食現象が発生し、このダミー電極パター
ン８の溶解後にプラス電極パターン２に移行する
こととなるので、相対的にはこの抵抗体構造の寿
命、従つて耐久性を更に大幅に向上させることが
可能となる。ここで、プラス電極パターン２に先
行してダミー電極パターン８が溶解するのは、水
分により体積抵抗値が低下するアルコール燃料や
その混合燃料中にこの構造の抵抗体を設置して液
面計測動作を行わせると、燃料を含む等価回路の
形成によりこのダミー電極パターン８に流れる電
流はプラス電極パターン２のそれに比較して２倍
以上、実際には５〜10倍程度の大きな値となる為
である。従つて、このようなダミー電極パターン
８を備えない構造に比較してプラス電極パターン
２の寿命を長期間良好に保持できるものとなる。 3 and 4 show another embodiment of the present invention, in which a dummy electrode pattern 8 is exposed in addition to the positive electrode pattern 2 and in the vicinity of the positive electrode pattern 2 in a resistor coated as described above. It was formed in According to the resistor having this structure, the electrolytic corrosion phenomenon first occurs between the dummy electrode pattern 8 and the earth electrode pattern 3, and then the transition to the positive electrode pattern 2 occurs after the dummy electrode pattern 8 is dissolved. Relatively speaking, it becomes possible to further significantly improve the life span and therefore the durability of this resistor structure. Here, the dummy electrode pattern 8 dissolves before the positive electrode pattern 2 because a resistor with this structure is installed in alcohol fuel or a mixed fuel thereof whose volume resistance value decreases due to moisture, and liquid level measurement is performed. If this is done, the current flowing through this dummy electrode pattern 8 will be more than twice that of the positive electrode pattern 2 due to the formation of an equivalent circuit containing fuel, and in fact it will be about 5 to 10 times larger. be. Therefore, compared to a structure that does not include such a dummy electrode pattern 8, the life of the positive electrode pattern 2 can be maintained well for a long period of time.
以上のとおり、本考案に係る液面計用抵抗体
は、液面変位の計測に必要な部分のみを最少限に
露出させて他は耐溶剤性の絶縁性樹脂で抵抗体表
面を極力被覆する構造を備えるので、抵抗体の耐
久性・寿命を向上させることが可能となる。又、
露出するダミー抵抗体を具備する構造を採用する
場合には、ダミー電極パターンがプラス電極パタ
ーンに先行して溶解することから、プラス電極パ
ターンの寿命を長期間良好に保持でき、従つて、
更に全体の耐久性・寿命を高め得るので、液面計
としての各種使用分野に対応できる。 As described above, in the resistor for a liquid level gauge according to the present invention, only the part necessary for measuring liquid level displacement is exposed to a minimum, and the rest is covered with solvent-resistant insulating resin as much as possible. Since the structure is provided, it is possible to improve the durability and life of the resistor. or,
When adopting a structure with an exposed dummy resistor, the dummy electrode pattern melts before the positive electrode pattern, so the life of the positive electrode pattern can be maintained well for a long period of time.
Furthermore, since the overall durability and lifespan can be increased, it can be used in various fields as a liquid level gauge.
第１図１，２は、本考案の一実施例に従つた液
面計用抵抗体のプラス電極パターン及びアース電
極パターンを概念的に示す図、第２図は第１図の
抵抗体の断面構成図、第３図及び第４図は本考案
の他の実施例によりダミー抵抗体を有するような
液面計用抵抗体の概念的な平面構成図及びその断
面構成図である。
１…支持体、２…プラス電極パターン、３…ア
ース電極パターン、５，６…接点摺動範囲、７…
絶縁性樹脂、８…ダミー電極パターン。
1 and 2 are diagrams conceptually showing a positive electrode pattern and a ground electrode pattern of a resistor for a liquid level gauge according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the resistor of FIG. 1. 3 and 4 are a conceptual plan view and a cross-sectional view of a resistor for a liquid level gauge having a dummy resistor according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Support body, 2...Positive electrode pattern, 3...Earth electrode pattern, 5, 6...Contact sliding range, 7...
Insulating resin, 8...Dummy electrode pattern.
Claims (1)
に形成したプラス電極パターンとアース電極パタ
ーンとを有する抵抗体を備え、この抵抗体の表面
に計測用接点の摺動範囲を除いて耐溶剤性樹脂を
被覆形成するように構成すると共に、該抵抗体が
上記耐溶剤性樹脂で被覆されない露出したダミー
電極パターンを具備すべく構成したことを特徴と
する液面計用抵抗体。 A resistor having a positive electrode pattern and a ground electrode pattern formed separately from a metal with a high specific resistance value is provided on each side of the support, and a resistor is provided on the surface of the resistor except for the sliding range of the measurement contact A resistor for a liquid level gauge, characterized in that the resistor is configured to be coated with a solvent-resistant resin, and the resistor is configured to include an exposed dummy electrode pattern that is not covered with the solvent-resistant resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1215383U JPS59117925U (en) | 1983-01-31 | 1983-01-31 | Resistor for liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1215383U JPS59117925U (en) | 1983-01-31 | 1983-01-31 | Resistor for liquid level gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59117925U JPS59117925U (en) | 1984-08-09 |
| JPH0233139Y2 true JPH0233139Y2 (en) | 1990-09-06 |
Family
ID=30143558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1215383U Granted JPS59117925U (en) | 1983-01-31 | 1983-01-31 | Resistor for liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59117925U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4959419B2 (en) * | 2007-05-23 | 2012-06-20 | 矢崎総業株式会社 | Liquid level detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6122246Y2 (en) * | 1980-11-19 | 1986-07-04 |
-
1983
- 1983-01-31 JP JP1215383U patent/JPS59117925U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59117925U (en) | 1984-08-09 |
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