JPH0532762Y2 - - Google Patents
Info
- Publication number
- JPH0532762Y2 JPH0532762Y2 JP1986018029U JP1802986U JPH0532762Y2 JP H0532762 Y2 JPH0532762 Y2 JP H0532762Y2 JP 1986018029 U JP1986018029 U JP 1986018029U JP 1802986 U JP1802986 U JP 1802986U JP H0532762 Y2 JPH0532762 Y2 JP H0532762Y2
- Authority
- JP
- Japan
- Prior art keywords
- dew condensation
- performance
- condensation sensor
- insulating protective
- protective film
- 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
- 238000009833 condensation Methods 0.000 claims description 38
- 230000005494 condensation Effects 0.000 claims description 38
- 239000005357 flat glass Substances 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- CMSGUKVDXXTJDQ-UHFFFAOYSA-N 4-(2-naphthalen-1-ylethylamino)-4-oxobutanoic acid Chemical compound C1=CC=C2C(CCNC(=O)CCC(=O)O)=CC=CC2=C1 CMSGUKVDXXTJDQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 12
- 239000000758 substrate Substances 0.000 description 11
- 238000011056 performance test Methods 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
〔産業上の利用分野〕
本考案は自動車のウインドガラス（通常はバツ
クウインドガラス）に貼着されて使用されるオー
トデフオツガ用静電容量検出型高性能結露センサ
に関する。
〔従来の技術〕
近年、自動車のバツクウインドガラス等におい
て、曇り（結露）が生じた時に、自動車に曇りを
検知し、デフオツガや導電性被膜（ヒータ膜）に
通電して曇りを除去するオートデフオツガが開発
されている（例えば、実開昭53−58956号）。
このオートデフオツガには、曇りを検出する結
露センサ（水分検出センサ）が用いられる。この
結露センサには抵抗検出型、静電容量検出型等が
あり、一般的には抵抗検出型結露センサを用いた
ものが公知である（例えば、実公昭55−48428
号）。この抵抗検出型結露センサは、ガラス板表
面上に対向して電極を設けたもの、あるいは更に
この電極間に跨がるように形成された親水性被膜
等の水分検出被膜を設けたものが知られており、
上記電極間あるいは水分検出被膜に水分が付着し
たとき、センサ表面の電流の流れあるいは電流の
流れによるインピーダンスの変化を検出し、所定
の設定値に達した時に抵抗加熱素子を通電加熱す
るよう構成されている。また、静電容量検出型結
露センサは、ガラス基板上に形成されたくし歯形
電極とこの電極を保護する絶縁保護膜とからな
り、対向電極に跨がつて水分が付着したときの静
電容量の変化を検出して、この値が所定値を超え
た時に抵抗加熱素子（デフオツガ線）に通電する
ものである。
〔考案が解決しようとする課題〕
ところで、上記静電容量検出型結露センサに使
用される絶縁保護膜は、一般に耐摩耗性等を考慮
して酸化アルミニウム（Al2O3）あるいは酸化ジ
ルコニウム（ZrO2）のようなセラミツク材料が
用いられている。
しかるに、実際の使用に際しては、材料の性質
の違いから、酸化アルミニウム等のセラミツク材
料からなる表面とウインドガラス等のガラス材料
からなる表面では、結露状況が異なる。このた
め、従来のように絶縁保護膜としてセラミツク材
料を用いた結露センサは、必ずしも正確なセンサ
とは言えないという問題がある。
そこで、結露センサの結露（水分）の検出能力
を上げる工夫が求められていた。
〔課題を解決するための手段〕
上記問題は、次に述べる本考案の高性能結露セ
ンサによつて解決される。
即ち、本考案の高性能結露センサは、自動車の
ウインドガラスに設けられて使用されるオートデ
フオツガ用の高性能結露センサであつて、
前記ウインドガラス上に形成されるITO膜およ
びNESA膜のいずれか一方からなるくし歯形透明
電極と、このくし歯形透明電極を覆う絶縁保護膜
とからなり、前記絶縁保護膜は取り付けられるウ
インドガラスと略同質のガラス材料からなること
を特徴としている。
以下、本考案について更に詳細に説明する。
本考案において、結露センサは自動車のバツク
ウインドガラス等のガラス基板に直接形成しても
よく、また例えば縦横30mm程度の小さな透明基板
上に形成してこの透明基板をバツクウインドガラ
スに貼着してもよい。小さな透明基板を用いる場
合には、この透明基板の厚さは0.3mm以下とする
ことが望ましい。これは、可撓性を持たせるため
と、見栄えを良くするためである。また、透明基
板としては、ガラス基板の他に、ポリエステル基
板等のプラスチツク基板を用いることができる。
ウインドガラスあるいは透明基板の上には、く
し歯形透明電極が形成される。このくし歯形透明
電極としては、酸化インジウム（In2O3）と酸化
錫（SnO2）とを主成分とするITO膜および酸化
錫（SnO2）からなるNESA膜のいずれか一方を
用いることができる。このくし歯形透明電極の電
極幅は0.05〜0.1mm、ギヤツプ幅は0.01mm〜0.1mm
程度とすることができる。このくし歯形透明電極
は通常真空蒸着法、スパツタリング法、イオンプ
レーテイング法等の真空成膜法により形成され、
厚さは数百〜数千Åとされる。
くし歯形透明電極の上には、絶縁保護膜が形成
される。この絶縁保護膜材料としては、結露セン
サを設けるウインドガラスと略同質のガラスを用
いる。このとき、ウインドガラスの材質と全く同
質とすることが望ましいが、若干異なつていても
よい。また、絶縁保護膜の膜厚は1.0μm程度とす
ることができる。この絶縁保護膜は、真空蒸着
法、スパツタリング法等の真空成膜法の他、低融
点ガラスのコーテイング等により形成することが
できる。
〔作用〕
本発明の高性能結露センサは、結露が生じる絶
縁保護膜が、従来のようにセラミツク材料ではな
く、取り付けるウインドガラスと略同質のガラス
材料から形成されているため、ウインドガラス表
面と同じ結露状況を示すことになる。
従つて、正確なセンサ機能を発揮でき、性能の
向上が図れる。
〔実施例〕
次に、本考案の実施例を図面を参考にして説明
する。
（第１実施例）
ここで、第１図は第２図の−線概略部分拡
大断面図、第２図は本考案の第１実施例に係る高
性能結露センサ高性能結露センサの概略平面図、
第３図は本考案の第１実施例に係る高感度結露セ
ンサの概略平面図、第３図は本考案の第１実施例
に係る高性能結露センサをバツクウインドガラス
に形成した状態を示す概略構成図、第４図は本考
案の第１実施例で得られた高性能結露センサの性
能試験装着を示す回路図、第５図は本考案の第１
実施例で得られた高性能結露センサの性能試験結
果を示すグラフである。
まず、第３図に示すバスバー（給電用電極）１
やデフオツガ線２が形成されたバツクウインドガ
ラス３を真空槽に入れ、バツクウインドガラス３
の所定位置、即ち、結露センサ形成位置にスパツ
タリング法によりITOからなるくし歯形電極４
を、第２図に示すように、約0.1μmの厚さに形成
する。続いて、同一真空槽内で、下記第１表に示
すターゲツト組成物質を用いて、くし歯形透明電
極４上に絶縁保護膜５を約1.0μmの厚さに形成し
た。このとき、真空槽内を2.6×10-3Paまで排気
し、アルゴンガスを導入して2.6×10-1Paとした
後、2.5W／cm2の電力を印加することによりスパ
ツタリングを行つた。この結果得られた絶縁保護
膜５の組成を第２表に示す。
[Industrial Field of Application] The present invention relates to a high-performance capacitance detection type dew condensation sensor for an auto defogger that is used by being attached to an automobile window glass (usually a back window glass). [Prior art] In recent years, auto defoggers have been developed that detect fogging (condensation) when it occurs on the back windshield of automobiles and remove the fog by applying electricity to the defogger and conductive film (heater film). It has been developed (for example, Utility Model Application Publication No. 53-58956). This auto-defogger uses a dew condensation sensor (moisture detection sensor) that detects cloudy weather. There are resistance detection type, capacitance detection type, etc. for this dew condensation sensor, and the one using resistance detection type dew condensation sensor is generally known (for example, Utility Model Publication No. 55-48428
issue). This resistance detection type dew condensation sensor is known to have electrodes placed opposite each other on the surface of a glass plate, or a moisture detection film such as a hydrophilic film formed to span between the electrodes. has been
When moisture adheres between the electrodes or on the moisture detection coating, the sensor is configured to detect the flow of current on the sensor surface or a change in impedance due to the flow of current, and when a predetermined set value is reached, heats the resistance heating element by energizing it. ing. The capacitance detection type dew condensation sensor consists of a comb-shaped electrode formed on a glass substrate and an insulating protective film that protects this electrode, and changes in capacitance when moisture adheres to the opposite electrode. is detected, and when this value exceeds a predetermined value, the resistance heating element (defogger wire) is energized. [Problem to be solved by the invention] By the way, the insulating protective film used in the capacitance detection type dew sensor is generally made of aluminum oxide (Al 2 O 3 ) or zirconium oxide (ZrO Ceramic materials such as 2 ) are used. However, in actual use, due to differences in the properties of the materials, condensation conditions differ between surfaces made of ceramic materials such as aluminum oxide and surfaces made of glass materials such as window glass. For this reason, conventional dew condensation sensors using ceramic materials as an insulating protective film have a problem in that they are not necessarily accurate sensors. Therefore, there was a need for a way to improve the dew condensation (moisture) detection ability of the dew condensation sensor. [Means for Solving the Problems] The above problems are solved by the high performance dew condensation sensor of the present invention described below. That is, the high-performance dew condensation sensor of the present invention is a high-performance dew condensation sensor for an auto defogger installed on the windshield of an automobile, and includes either an ITO film or a NESA film formed on the windshield. It consists of a comb-shaped transparent electrode, and an insulating protective film that covers the comb-shaped transparent electrode, and the insulating protective film is made of a glass material that is substantially the same as the window glass to which it is attached. The present invention will be explained in more detail below. In the present invention, the dew condensation sensor may be formed directly on a glass substrate such as the back window glass of an automobile, or it may be formed on a small transparent substrate of about 30 mm in length and width, and this transparent substrate is attached to the back window glass. Good too. When using a small transparent substrate, it is desirable that the thickness of this transparent substrate be 0.3 mm or less. This is to provide flexibility and improve appearance. Furthermore, as the transparent substrate, a plastic substrate such as a polyester substrate can be used in addition to a glass substrate. A comb-shaped transparent electrode is formed on the window glass or the transparent substrate. As this comb-shaped transparent electrode, it is possible to use either an ITO film mainly composed of indium oxide (In 2 O 3 ) and tin oxide (SnO 2 ) or a NESA film composed of tin oxide (SnO 2 ). can. The electrode width of this comb-shaped transparent electrode is 0.05~0.1mm, and the gap width is 0.01mm~0.1mm.
It can be done to a certain extent. This comb-shaped transparent electrode is usually formed by a vacuum film forming method such as a vacuum evaporation method, a sputtering method, or an ion plating method.
The thickness is said to be several hundred to several thousand Å. An insulating protective film is formed on the comb-shaped transparent electrode. As this insulating protective film material, glass that is substantially the same as the window glass on which the dew condensation sensor is provided is used. At this time, it is desirable that the material be completely the same as the material of the window glass, but it may be slightly different. Furthermore, the thickness of the insulating protective film can be approximately 1.0 μm. This insulating protective film can be formed by a vacuum film forming method such as a vacuum evaporation method or a sputtering method, or by coating with low melting point glass. [Function] In the high-performance dew condensation sensor of the present invention, the insulating protective film on which dew condensation occurs is not made of ceramic material as in the past, but is made of a glass material that is substantially the same as the window glass to which it is attached. This will indicate the condensation situation. Therefore, accurate sensor function can be achieved and performance can be improved. [Example] Next, an example of the present invention will be described with reference to the drawings. (First Embodiment) Here, FIG. 1 is a schematic partially enlarged sectional view taken along the line - in FIG. 2, and FIG. 2 is a schematic plan view of a high-performance dew condensation sensor according to a first embodiment of the present invention. ,
FIG. 3 is a schematic plan view of a high-sensitivity dew condensation sensor according to the first embodiment of the present invention, and FIG. 3 is a schematic diagram showing the state in which the high-performance dew condensation sensor according to the first embodiment of the present invention is formed on a back window glass. 4 is a circuit diagram showing the performance test installation of the high-performance dew condensation sensor obtained in the first embodiment of the present invention, and FIG.
It is a graph showing performance test results of high-performance dew condensation sensors obtained in Examples. First, bus bar (power supply electrode) 1 shown in Fig. 3
Place the back window glass 3 on which the defogger and defogger wires 2 are formed into a vacuum chamber.
A comb-shaped electrode 4 made of ITO is attached by sputtering to a predetermined position, that is, a position where a dew condensation sensor is formed.
is formed to a thickness of approximately 0.1 μm as shown in FIG. Subsequently, in the same vacuum chamber, an insulating protective film 5 with a thickness of about 1.0 μm was formed on the comb-shaped transparent electrode 4 using the target composition shown in Table 1 below. At this time, the inside of the vacuum chamber was evacuated to 2.6×10 −3 Pa, argon gas was introduced to bring the temperature to 2.6×10 −1 Pa, and then sputtering was performed by applying a power of 2.5 W/cm 2 . The composition of the insulating protective film 5 obtained as a result is shown in Table 2.
【表】【table】
以上より、本考案の高性能結露センサによれ
ば、結露が生じる絶縁保護膜が、ウインドガラス
と略同質のガラス材料から形成されているため、
ウインドガラス表面と結露センサ表面とが同じ結
露状況となり、結露の検出性能を大幅に向上する
ことができるという優れた効果を奏することがで
きる。
From the above, according to the high-performance dew condensation sensor of the present invention, the insulating protective film on which dew condensation occurs is formed from a glass material that is substantially the same as the window glass.
The window glass surface and the dew condensation sensor surface have the same dew condensation condition, and an excellent effect can be achieved in that dew condensation detection performance can be greatly improved.
第１図は第２図の−線概略部分拡大断面
図、第２図は本考案の第１実施例に係る高感度結
露センサの概略平面図、第３図は本考案の第１実
施例に係る高性能結露センサをバツクウインドガ
ラスに形成した状態を示す概略構成図、第４図は
本考案の第１実施例で得られた高性能結露センサ
の性能試験装着を示す回路図、第５図は本考案の
第１実施例で得られた高性能結露センサの性能試
験結果を示すグラフ、第６図は比較例で得られた
結露センサの性能試験結果を示すグラフである。
１……バスバー、２……デフオツガ線、３……
バツクウインドガラス、４……くし歯形透明電
極、５……絶縁保護膜、６……結露センサ。
1 is a schematic partially enlarged sectional view taken along the line - in FIG. 2; FIG. 2 is a schematic plan view of a high-sensitivity dew condensation sensor according to the first embodiment of the present invention; and FIG. FIG. 4 is a schematic configuration diagram showing a state in which such a high-performance dew condensation sensor is formed on a back window glass; FIG. 4 is a circuit diagram showing a performance test installation of the high-performance dew condensation sensor obtained in the first embodiment of the present invention; FIG. 6 is a graph showing the performance test results of the high-performance dew condensation sensor obtained in the first example of the present invention, and FIG. 6 is a graph showing the performance test results of the dew condensation sensor obtained in the comparative example. 1...bus bar, 2...default cable, 3...
Back window glass, 4... comb-shaped transparent electrode, 5... insulating protective film, 6... dew condensation sensor.
Claims (1)
るオートデフオツガ用の高性能結露センサであつ
て、 前記ウインドガラス上に形成されるITO膜およ
びNESA膜のいずれか一方からなるくし歯形透明
電極と、このくし歯形透明電極を覆う絶縁保護膜
とからなり、前記絶縁保護膜は取り付けられるウ
インドガラスと略同質のガラス材料からなること
を特徴とする高性能結露センサ。[Claims for Utility Model Registration] A high-performance dew condensation sensor for an auto defogger installed on the windshield of an automobile, the comb consisting of either an ITO film or a NESA film formed on the windshield. A high-performance dew condensation sensor comprising a tooth-shaped transparent electrode and an insulating protective film covering the comb-shaped transparent electrode, the insulating protective film being made of a glass material substantially the same as the window glass to which it is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986018029U JPH0532762Y2 (en) | 1986-02-10 | 1986-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986018029U JPH0532762Y2 (en) | 1986-02-10 | 1986-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62133159U JPS62133159U (en) | 1987-08-22 |
| JPH0532762Y2 true JPH0532762Y2 (en) | 1993-08-20 |
Family
ID=30811331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986018029U Expired - Lifetime JPH0532762Y2 (en) | 1986-02-10 | 1986-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0532762Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5965246A (en) * | 1982-08-25 | 1984-04-13 | エンドレス・ウント・ハウザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ− | Measuring device for dew point |
-
1986
- 1986-02-10 JP JP1986018029U patent/JPH0532762Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5965246A (en) * | 1982-08-25 | 1984-04-13 | エンドレス・ウント・ハウザ−・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニ− | Measuring device for dew point |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62133159U (en) | 1987-08-22 |
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