JPS62233743A - Dew condensation sensor - Google Patents
Dew condensation sensorInfo
- Publication number
- JPS62233743A JPS62233743A JP61075627A JP7562786A JPS62233743A JP S62233743 A JPS62233743 A JP S62233743A JP 61075627 A JP61075627 A JP 61075627A JP 7562786 A JP7562786 A JP 7562786A JP S62233743 A JPS62233743 A JP S62233743A
- Authority
- JP
- Japan
- Prior art keywords
- dew condensation
- light
- dew
- water
- attenuated
- 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.)
- Granted
Links
- 230000005494 condensation Effects 0.000 title claims abstract description 54
- 238000009833 condensation Methods 0.000 title claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 15
- 239000005357 flat glass Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000002834 transmittance Methods 0.000 claims description 2
- 230000002238 attenuated effect Effects 0.000 abstract description 7
- 230000003321 amplification Effects 0.000 abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 108091008695 photoreceptors Proteins 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、結露の発生を光学的に検出するセンサに係り
、特に自動車などの車両における空気調和装置に好適な
結露センサに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sensor that optically detects the occurrence of dew condensation, and particularly to a dew condensation sensor suitable for an air conditioner in a vehicle such as an automobile.
自動車など車両用の空気調和装置においては。 In air conditioners for vehicles such as automobiles.
例えば特開昭５７−５５２１１号公報に記載の如く、窓
ガラス面、特に前面窓ガラス面での結露を防止するため
、除湿機能を備え、結露発生の！１ｔ１１が生じたとき
には自動的にこの除濁機能を作動させるようにしたもの
がある。For example, as described in Japanese Unexamined Patent Publication No. 57-55211, a dehumidifying function is provided to prevent condensation on the window glass surface, especially on the front window glass surface. Some devices are designed to automatically activate this turbidity removal function when 1t11 occurs.
ところで、このような空気調和装置に必要な結露センサ
としては、従来から種々の方式のものが提案されている
が、その一方式として、いわゆる光学的な結露センサが
ある。By the way, various types of dew condensation sensors necessary for such air conditioners have been proposed in the past, and one type is a so-called optical dew condensation sensor.
従来の、このような結露センサは１例えば実開昭５９−
９号公報に開示さねているように、車室内に発光器と受
光器を隣接して設置し、窓ガラスに密着して配設した反
射体による反射光量の減殺により、結露を検出するよう
になっていた。Conventional dew condensation sensors of this type include one example,
As disclosed in Publication No. 9, a light emitter and a light receiver are installed adjacent to each other in the vehicle interior, and condensation is detected by reducing the amount of reflected light by a reflector placed in close contact with the window glass. It had become.
上記従来技術は１反射体の汚れによっても光が散乱し２
反射光が減殺されてしまうという点くついて配慮がさね
ておらず、長期間の使用による汚れの発生などのために
、誤検知を起し易くなるという問題があった。In the above conventional technology, 1. the light is scattered due to dirt on the reflector; 2.
There was a problem in that no consideration was given to the fact that the reflected light was attenuated, and that false detections were more likely to occur due to the generation of dirt due to long-term use.
本発明の目的は、結露面圧おける汚れの影響を排除し、
結露だけによる光量の減衰量を知ることができ、長期に
渡り高信頼度で使用できる非接触型の結露検出手段を提
供することにある。The purpose of the present invention is to eliminate the influence of dirt on dew condensation surface pressure,
It is an object of the present invention to provide a non-contact type dew condensation detection means that can detect the amount of attenuation of the amount of light due only to dew condensation and can be used with high reliability over a long period of time.
本発明によねば、−ヒ記問題点は、水に対する透過率を
異にする第１と第２の波長帯の光を用いて結露を検出す
るようにすることにより解決される。According to the present invention, the above problem is solved by detecting dew condensation using light in first and second wavelength bands that have different transmittances to water.
これらｉ＠１と第２の光は、水の存在に対してだけ異な
った影響を受け、水以外の汚ねなど知よっては同じ影響
を受けるだけであるから、汚れなどによる検出誤差を除
き、水の存在、つまり結露だけを正しく検出することが
できる。These i@1 and second lights are affected differently only by the presence of water, and are affected by dirt other than water in the same way, so excluding detection errors due to dirt, etc. Only the presence of water, or condensation, can be detected correctly.
以下１本発明による結露センサについて１図示の実施例
により詳細に説明する、
ｌ＠１図は本発明の一実施例で１図において、】は発光
部で６発光ダイオードなどの発光素子からなる第１の発
光体１ａと第２の発光体１ｂとを含むもの、２は結露面
、３は受光部で、フォトダイオードなどの光電検出素子
からなる第１の受光体３ａと第２の受光体３ｂとを含む
もの、４は増幅部で第１と第２の増幅器４ａ、４ｂを含
むもの。Below, the dew condensation sensor according to the present invention will be explained in detail with reference to the embodiment shown in Figure 1. Figure 1 is an embodiment of the present invention. 1 includes a light emitter 1a and a second light emitter 1b, 2 is a dew condensation surface, 3 is a light receiving part, and the first light receiver 3a and the second light receiver 3b are composed of a photoelectric detection element such as a photodiode. and 4 is an amplification section that includes first and second amplifiers 4a and 4b.
５は比較部で、オペアンプなどからなる比較器５ａと抵
抗器５ｂとを含むもの、６は車両のフロントガラスなど
の窓ガラス板、７は金属部材である、次に、この実施例
の動作について説明する。Reference numeral 5 designates a comparison section, which includes a comparator 5a consisting of an operational amplifier and the like and a resistor 5b, 6 a window glass plate such as a windshield of a vehicle, and 7 a metal member.Next, the operation of this embodiment will be explained. explain.
窓ガラス板６に雲りが生じるのは、低い車室外気温度に
より、この窓ガラス板６が車室内気の露点温度以下に冷
された場合である。そこで、前記窓ガラス板６に熱伝導
率が高い金属部材７を埋め込めば、低い車室外気温度が
車室側面に導かれ。Clouding occurs on the window glass plate 6 when the window glass plate 6 is cooled to below the dew point temperature of the air inside the vehicle due to the low outside air temperature. Therefore, if a metal member 7 with high thermal conductivity is embedded in the window glass plate 6, the low outside air temperature of the vehicle interior will be guided to the side surface of the vehicle interior.
該金属部材７の車室側面温度は１周囲の窓ガラス板６に
較べて低くなり、結露が発生し易くなるので、検出用の
結露面２として好ましいものとすることができる。ちな
みに、外気温度０°Ｃ１日射無日射風状態の場所に車両
を止め、車室内気温度を２５００に温度調整すると、前
記金属部材７による検出用の結露面２の温度は１２．５
°Ｃとなり１周囲の窓ガラス板６の車室側面温度に較べ
、約２°Ｃ低くなり。The temperature of the side surface of the vehicle interior of the metal member 7 is lower than that of the surrounding window glass plate 6, and dew condensation is more likely to occur, so it can be preferable as the dew condensation surface 2 for detection. By the way, if the vehicle is stopped at a place where the outside temperature is 0°C, no solar radiation, and no wind, and the interior temperature of the vehicle is adjusted to 2500, the temperature of the dew condensation surface 2 for detection by the metal member 7 is 12.5.
1°C, which is about 2°C lower than the temperature of the side of the passenger compartment of the surrounding window glass plate 6.
結露をいち早く検出することができる。Dew condensation can be detected quickly.
車室内圧設ける発光部１は、第１の波長帯の光を発する
第１の発光体１ａと、第２の波長帯の光を発する第２の
発光体１ｂからなる。ここで、該第１の波長帯を水に吸
収され易い波長帯（本実施例では紫外線である０、１μ
ｍ）に、そして、前記第２の波長帯は水にほとんど吸収
さねない波長帯（本実施例では赤外線である１、０μｍ
）にそねぞれ選んでおく、なお、水の光に対する透過特
性は第２図に示すようになっている、
そうすると、第１の発光体１ａから発せられた光は、結
露面２に付いた水分（結露水）による吸収と、汚れ等に
よる散乱の双方による減衰を受けて、受光部３に達する
。一方、第２の発光体１ｂから発せら名た光は、前記結
露面２の汚４等による散乱による減衰だけを受け、水分
による減衰はほとんど受けないままで受光部３に達する
。The light emitting unit 1 for providing pressure in the vehicle interior includes a first light emitter 1a that emits light in a first wavelength band, and a second light emitter 1b that emits light in a second wavelength band. Here, the first wavelength band is a wavelength band that is easily absorbed by water (in this example, ultraviolet rays of 0 and 1μ
m), and the second wavelength band is a wavelength band that is hardly absorbed by water (in this example, it is infrared rays of 1.0 μm).
), and the transmission characteristics of water for light are as shown in Figure 2. Then, the light emitted from the first light emitter 1a will be attached to the dew condensation surface 2. The light reaches the light receiving section 3 after being attenuated by both absorption by water (condensed water) and scattering by dirt and the like. On the other hand, the light emitted from the second light emitter 1b is attenuated only by scattering from the dirt 4 on the dew condensation surface 2, and reaches the light receiving section 3 without being attenuated by moisture.
該受光部３は１．＠ｌの発光体１ａかもの光を受けるｗ
Ｊｌの受光体３ａと、第２の発光体１ｂからの光を受け
る第２の受光体３ｂからなる。該受光部３で検出した光
量は、増幅部４で、第１の増幅器４ａと、該第１の増幅
器４ａより増幅率がやや小さく設定さねている第２の増
幅器４ｂにより。The light receiving section 3 has 1. @l's light emitter 1a receives light lol
It consists of a Jl photoreceptor 3a and a second photoreceptor 3b that receives light from the second light emitter 1b. The amount of light detected by the light receiving section 3 is detected by the amplifying section 4 using a first amplifier 4a and a second amplifier 4b whose amplification factor is set to be slightly smaller than that of the first amplifier 4a.
それぞれ増幅きれ、比較部５で受光量の大小比較が行な
われる、
比較部５は比較器５ａとハンチング防止用の抵抗器５ｂ
とからなり、増幅器４ａと４ｂの出力信号ａ、ｂのレベ
ル比較を行ない、ａ）ｂのときには出力ｏｕｔにレベル
″Ｌ”を発生し、ａ（ｂのとキニはレベル”Ｈ”を発生
する。After each amplification is completed, the comparison section 5 compares the magnitude of the received light amount.The comparison section 5 includes a comparator 5a and a hunting prevention resistor 5b.
The output signals a and b of the amplifiers 4a and 4b are compared in level, and when a) and b, a level "L" is generated at the output out, and a and b generate a level "H". .
そこで、まず、結露面２に結露が生じていない状態では
第１と第２の受光体３ａ、３ｂの出力がほぼ等しくなる
ように予め調整しておく。Therefore, first, the outputs of the first and second photoreceptors 3a and 3b are adjusted in advance so that they are approximately equal when no dew condensation occurs on the dew condensation surface 2.
そうすると、結露面２に結露を生じていないときには、
たとえ、この結露面２に汚れなどが発生して、受光体３
ａと３ｂに入射される光の量に変化を生じたとしても、
そねぞれの受光体３ａ、３ｂに入射する光量の比は変化
しないから、このときには出力ｏｕｔは常にレベル″’
Ｌ″となる。Then, when there is no condensation on the condensation surface 2,
Even if dirt or the like occurs on this dew condensation surface 2, the photoreceptor 3
Even if there is a change in the amount of light incident on a and 3b,
Since the ratio of the amount of light incident on the respective photoreceptors 3a and 3b does not change, the output out is always at the level "'" at this time.
It becomes L''.
しかして、結露面２に結露を生じたときには。However, when dew condensation occurs on the dew condensation surface 2.
この結露水による影偉は第１の発光体１ａからの第１の
波長帯の光（この実施例では紫外線）にだけ、それの減
衰として現われるから、このときには出力ｏｕｔは必ず
レベル１Ｈ″になる。The effect of this condensed water appears only in the light of the first wavelength band (ultraviolet rays in this embodiment) from the first light emitter 1a, and therefore the output out is always at the level 1H'' at this time. .
従って、この実施例によねば、検出用の結露面２に汚れ
などを生じても、それによる誤動作の虞ねは全くなく、
常に確実に結露の発生を検知することができ、上記した
車両用空気調和装置に適用して常に正確な除湿制御を行
なわせることができる。Therefore, according to this embodiment, even if dirt or the like occurs on the detection surface 2, there is no risk of malfunction due to it.
The occurrence of dew condensation can always be reliably detected, and the present invention can be applied to the above-mentioned vehicle air conditioner to always perform accurate dehumidification control.
次に、第３図に本発明の他の一実施例を示す。Next, FIG. 3 shows another embodiment of the present invention.
この第３図の実施例は１発光部ｌと受光部３とを窓ガラ
ス板６を挾んで車両の車外側と車内側とに分けて配置し
、窓ガラス板６の内面を結露面２とし、透過光により結
露の検出を行なうようにしたものであり、このため金属
部材からなる結露面を用い゛て結露を促進させることは
できないが、その他の効果などは第１図の実施例と同じ
である。In the embodiment shown in FIG. 3, a light emitting section 1 and a light receiving section 3 are arranged separately on the outside and inside of the vehicle by sandwiching a window glass plate 6, and the inner surface of the window glass plate 6 is used as a dew condensation surface 2. , dew condensation is detected using transmitted light, and therefore dew condensation cannot be promoted using a dew condensation surface made of a metal member, but other effects are the same as in the embodiment shown in Figure 1. It is.
また、第４図は、検出用の結露面と光とを平行圧した本
発明の一実施例で１発光部１から受光部３１Ｃ到る第１
と＠２の光の光路な結露面２に沿うよう忙して形成させ
たものであり、その他の部分は第１図の実施例と同じで
ある。Further, FIG. 4 shows an embodiment of the present invention in which the dew condensation surface for detection and the light are parallel pressured, and the first
The other parts are the same as the embodiment shown in FIG.
この第４図の実施例によれば、結露による水分中を通る
光路が長（とれ、従って検出減産を高（得ることができ
る。According to the embodiment shown in FIG. 4, the optical path passing through the moisture due to dew condensation is long, and therefore a high detection yield can be obtained.
以上説明したように１本発明によれば、検出用の結露面
に汚１などを生じても、それによる誤検出の虞れは全（
生じないようにできるから、従来技術の問題点に充分に
対処でき、長期にわたって高い信頼性を保った結露の検
出が行なえ、車両用空気調和装置に適用して正確な除湿
制御を行なうのに有用な結露センサを容易に提供できる
。As explained above, according to the present invention, even if dirt 1 or the like occurs on the detection surface, there is no possibility of false detection due to it (
Since it is possible to prevent condensation from occurring, the problems of conventional technology can be fully addressed, and dew condensation can be detected with high reliability over a long period of time, making it useful for accurate dehumidification control when applied to vehicle air conditioners. A dew condensation sensor can be easily provided.
第１図は本発明による結露センサの一実施例を示すブロ
ック図、第２図は水による光の透過特性を示す特性曲線
図、第３図は本発明の他の一実施例を示すブロック図、
第４図は本発明のさらに別の一実施例における検出部の
構成を示す説明図である。
１・・・・・・発光部、２・・・・・・結露面、３・・
・・・・受光部。
４・・・・・・増幅部、５・・・・・・比較部、６・・
・・・・窓ガラス板。
７・・・・・・金属部材。
第１図
第２図FIG. 1 is a block diagram showing an embodiment of a dew condensation sensor according to the present invention, FIG. 2 is a characteristic curve diagram showing light transmission characteristics through water, and FIG. 3 is a block diagram showing another embodiment of the present invention. ,
FIG. 4 is an explanatory diagram showing the configuration of a detection section in yet another embodiment of the present invention. 1... Light emitting part, 2... Condensation surface, 3...
····Light receiving section. 4...Amplification section, 5...Comparison section, 6...
...Window glass plate. 7...Metal member. Figure 1 Figure 2
Claims (1)
水を横切るようにして形成した光路を通過する光の状態
変化により結露発生を検出する方式の結露センサにおい
て、上記光路を通過すべき光として、水に対する透過率
を異にする第１と第２のそれぞれの波長帯の光を発生す
る光源手段を設け、上記光路通過後における上記第１と
第２の光の光量比較により結露発生を検出するように構
成したことを特徴とする結露センサ。 ２、特許請求の範囲第１項において、上記第１と第２の
波長帯の光が、０．２μｍ付近の波長を境にしてそれよ
りも短波長帯と長波長帯のそれぞれとなるように構成さ
れていることを特徴とする結露センサ。 ３、特許請求の範囲第１項において、上記結露検出面が
、車両の窓ガラス板の内側面および該窓ガラス板の一部
に置換して設けた金属部材の内側面の少くとも一方とな
るように構成したことを特徴とする結露センサ。[Claims] 1. A dew condensation sensor that is equipped with a dew condensation detection surface and detects the occurrence of dew condensation based on a change in the state of light passing through an optical path formed to cross the condensed water generated on the dew condensation detection surface, Light source means for generating light in first and second wavelength bands having different transmittances to water as light to be passed through the optical path is provided, and the first and second lights after passing through the optical path are provided. 1. A dew condensation sensor configured to detect the occurrence of condensation by comparing the amount of light. 2. In claim 1, the light in the first and second wavelength bands is separated by a wavelength around 0.2 μm and becomes a shorter wavelength band and a longer wavelength band, respectively. A dew condensation sensor comprising: 3. In claim 1, the dew condensation detection surface is at least one of the inner surface of a window glass plate of the vehicle and the inner surface of a metal member provided in place of a part of the window glass plate. A dew condensation sensor characterized by being configured as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075627A JPS62233743A (en) | 1986-04-03 | 1986-04-03 | Dew condensation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075627A JPS62233743A (en) | 1986-04-03 | 1986-04-03 | Dew condensation sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62233743A true JPS62233743A (en) | 1987-10-14 |
| JPH0531098B2 JPH0531098B2 (en) | 1993-05-11 |
Family
ID=13581658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61075627A Granted JPS62233743A (en) | 1986-04-03 | 1986-04-03 | Dew condensation sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62233743A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634535A (en) * | 1992-07-14 | 1994-02-08 | Hiroo Tarumi | Method for measuring dew formation and meter for dew formation |
| JP2011252856A (en) * | 2010-06-03 | 2011-12-15 | Denso Corp | Adhesive moisture detecting device and adhesive moisture detecting method using the same |
| WO2012132311A1 (en) * | 2011-03-28 | 2012-10-04 | 富士フイルム株式会社 | Condensation detection method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101952A (en) * | 1980-12-17 | 1982-06-24 | Hitachi Ltd | Bus tracer |
-
1986
- 1986-04-03 JP JP61075627A patent/JPS62233743A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101952A (en) * | 1980-12-17 | 1982-06-24 | Hitachi Ltd | Bus tracer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634535A (en) * | 1992-07-14 | 1994-02-08 | Hiroo Tarumi | Method for measuring dew formation and meter for dew formation |
| JP2011252856A (en) * | 2010-06-03 | 2011-12-15 | Denso Corp | Adhesive moisture detecting device and adhesive moisture detecting method using the same |
| WO2012132311A1 (en) * | 2011-03-28 | 2012-10-04 | 富士フイルム株式会社 | Condensation detection method and device |
| JP2012202930A (en) * | 2011-03-28 | 2012-10-22 | Fujifilm Corp | Dew condensation detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531098B2 (en) | 1993-05-11 |
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