JPS6027842A - Blur detector for vehicle - Google Patents
Blur detector for vehicleInfo
- Publication number
- JPS6027842A JPS6027842A JP58136374A JP13637483A JPS6027842A JP S6027842 A JPS6027842 A JP S6027842A JP 58136374 A JP58136374 A JP 58136374A JP 13637483 A JP13637483 A JP 13637483A JP S6027842 A JPS6027842 A JP S6027842A
- Authority
- JP
- Japan
- Prior art keywords
- windshield
- light
- receiver
- vehicle
- reflected
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000000717 retained effect 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
- B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven
- B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like
-
- 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
- G01N21/55—Specular reflectivity
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は車両の風防板内面に生じる曇りを検出する装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting fogging occurring on the inner surface of a windshield plate of a vehicle.
車両の風防板、例えば前方窓ガラスに曇りが生じると、
視界の妨げとなるので、これを自動的に検出し曇り除去
装置を自動的に作動させる装置の（１）
出現が望まれている。If the windshield of your vehicle, such as the front window glass, becomes foggy,
Since it obstructs visibility, it is desired to develop a device that automatically detects this and automatically activates a defogging device.
本発明者は、光学的手段を用いて車両風防板の曇りを検
出する装置の検討をすすめている。光学的手段は発光器
と受光器とを風防板内面でその光線が反射するように配
置し、曇り状態に応じた反射光の受光量を検出するよう
に構成される。しかし、発光器あるいは受光器は、素子
自身または光路における汚れ度合や、素子自身の経年変
化のために、その特性が変化しするため、受光量を絶対
値としての設定値と比較するのでは、装置の作動特性を
一定に保つことができない。The present inventor has been studying a device for detecting fogging of a vehicle windshield using optical means. The optical means is configured such that a light emitter and a light receiver are arranged so that the light beam is reflected on the inner surface of the windshield plate, and the amount of received reflected light is detected depending on the cloudy state. However, the characteristics of a light emitter or receiver change due to the degree of contamination in the element itself or the optical path, or due to aging of the element itself, so comparing the amount of light received with a set value as an absolute value is not recommended. The operating characteristics of the device cannot be kept constant.
本発明は上記の事情に鑑みて、車両の風防板内面に生じ
た曇りに応答して曇り除去装置を的確に作動させ得る装
置を提供することを目的とするものである。SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a device that can accurately operate a defogging device in response to fogging formed on the inner surface of a windshield plate of a vehicle.
このため本発明は、赤外光が車両の風防板内面で反射す
るように照射する投光器と前記風防板で反射された反射
光を受光する受光器とを備えて、この受光器の受光信号
の大きさにより前記風防板における曇り状態を判別する
ようにした車両用曇（２）
り検出装置であって、前記受光信号の大きさを所定の設
定値と比較して検出信号を生じる比較手段を設けるとと
もに、前記設定値を前記受光信号の変化が安定している
ときにその受光信号に対応して修正する修正手段を設り
てなることを特徴とする。For this reason, the present invention includes a projector that emits infrared light so that it is reflected on the inner surface of a windshield of a vehicle, and a receiver that receives the reflected light reflected by the windshield. A fogging detection device for a vehicle that determines the fogging state of the windshield based on the magnitude thereof, the fogging detection device comprising comparing means for generating a detection signal by comparing the magnitude of the received light signal with a predetermined set value. The present invention is characterized in that it further includes a correction means for correcting the set value in response to the light reception signal when the change in the light reception signal is stable.
（多連する実施例においては、修正手段は曇り除去装置
を作動させた後の受光信号の様子から、曇りが除去され
たことを検出し、特にこのとき、受光信号がそれまでの
設定値の近傍にあって、しかもその変化が殆どない場合
に、発光器および受光器の光学特性が基準状態にあると
見なし、このときの受光信号に対応して設定値を定める
。(In multiple embodiments, the correcting means detects that the fogging has been removed from the state of the light reception signal after the fog removal device is activated, and in particular, at this time, the light reception signal is lower than the previous setting value. If they are close to each other and there is almost no change, it is assumed that the optical characteristics of the light emitter and the light receiver are in the reference state, and the set value is determined in accordance with the light reception signal at this time.
−且定められた設定値は、車両のキーヌイ・７チが開放
された後も保持されるように、記憶する。- The predetermined setting values are stored so that they are retained even after the vehicle keypad is released.
このため、車両のキースイッチが投入された直後に風防
板が曇っているときにも、直ぢに装置を作動開始するこ
とができる。Therefore, even if the windshield is fogged up immediately after the key switch of the vehicle is turned on, the device can be started to operate immediately.
以下、本発明を添付図面に示す実施例について説明する
。第１図において、符号ｌは発光ダイオード等の発光素
子と集光レンズで構成され、フロ（３）
ントガラス（風防板）内面の曇り検出面３に赤りｌ光量
を照射するようフロントガラス枠に配置された発光器で
ある。５はフォトダイオード等の受光素子と集光レンズ
で構成され、曇り検出面３で反射された反射光６を受光
するように反対側のフロントガラス枠に配置された受光
器である。Embodiments of the present invention will be described below with reference to the accompanying drawings. In Fig. 1, the symbol l is composed of a light-emitting element such as a light-emitting diode and a condensing lens, and is attached to the windshield frame so as to irradiate the fogging detection surface 3 on the inner surface of the windshield (windshield) with an amount of red light l. It is a light emitter arranged. A light receiver 5 is composed of a light receiving element such as a photodiode and a condenser lens, and is arranged on the opposite windshield frame so as to receive the reflected light 6 reflected by the fogging detection surface 3.
発光器と受光器はそれぞれ２個配置され、フロントガラ
ス内面の上側と下側とに位置する二つの検出面３での光
学反射に応答するようになっている。なお、発光器と受
光器との取りつけ位置は、左右反対としても差支えない
。Two light emitters and two light receivers are arranged, and they respond to optical reflections from two detection surfaces 3 located on the upper and lower sides of the inner surface of the windshield. Note that the mounting positions of the light emitter and the light receiver may be reversed from left to right.
第２図において、７は発光素子１の駆動回路、８は受光
素子５の出力増幅回路、９は検波回路、１０は比較制御
回路、１１は曇り除去装置である。In FIG. 2, 7 is a drive circuit for the light emitting element 1, 8 is an output amplification circuit for the light receiving element 5, 9 is a detection circuit, 10 is a comparison control circuit, and 11 is a fog removal device.
なお曇り除去装置１６は空調装置より乾燥空気を吹き出
しさせるため、一つまたはいくつかの空調機能要素を組
合せ作動させるもの、あるいは熱線ヒータに通電するも
のが適応される。例えば、空調の送風機を作動させ、か
つ空調装置の吹き出しモードをデフロスタ吹出とするア
クチュエータを（４）
作動さ一ロるものとする。１２は増幅回路８、検波回路
９、比較制御回路１０を総称する検出回路である。第２
図においては、駆動回路７と検出回路１２は一つのみ図
示されているが、発光素子１と受光素子２の個数に対応
した個数だけ設け、いずれか一つの検出回路が検出信号
を生じたときに曇り除去装置１１が作動されるようにＯ
Ｒ結合作動回路（論理和条件回路）を設けるものとする
。In order to blow out dry air from an air conditioner, the defogging device 16 may be one that operates one or several air conditioning functional elements in combination, or one that energizes a hot wire heater. For example, it is assumed that (4) an actuator is activated that activates an air conditioner blower and sets the air conditioner's blowout mode to defroster blowout. 12 is a detection circuit that collectively refers to the amplifier circuit 8, the detection circuit 9, and the comparison control circuit 10. Second
Although only one drive circuit 7 and one detection circuit 12 are shown in the figure, they are provided in a number corresponding to the number of light emitting elements 1 and light receiving elements 2, and when one of the detection circuits generates a detection signal. O so that the defogging device 11 is activated.
An R-coupling operation circuit (OR condition circuit) shall be provided.
比較制御回Ｉｌｌ！ １０はマイクロコンピュータを用
いて構成される。すなわち、検波回路９から入力される
電気信号をデジタル信号に変換する変換回路と、制御手
順を定めた制御プログラムを記憶したプログラムメモリ
と、データの一時記憶用メモリと、制御プログラムに従
ってデジタルデータを処理するＣＰＵと、データ転送線
群と、入出力回路およびタイミング回路等を含む。この
マイクロコンピュータにおいて、上記一時メモリは車両
のキースイッチ（図示せず）が開放されても記憶内容を
保持するバックアップ手段を有している。Comparison control episode Ill! 10 is configured using a microcomputer. That is, a conversion circuit that converts the electrical signal input from the detection circuit 9 into a digital signal, a program memory that stores a control program that defines control procedures, a memory for temporary storage of data, and a memory that processes digital data according to the control program. It includes a CPU, a data transfer line group, an input/output circuit, a timing circuit, and the like. In this microcomputer, the temporary memory has backup means for retaining the stored contents even if a key switch (not shown) of the vehicle is released.
比較制御回路１０の動作手順を定める上記の制（５）
御プログラムが第３図に表されている。この装置の作動
をこの制御プログラムと上記構成に基づいてする。まず
、発光器ｌは発光駆動回路７Ｊ−り付与される電気信号
を受けて変調された赤り（光４を曇り検出面３に照射し
、その反射光６は受光器５で受光される。受光に基つい
て生じる電気信号は増幅回路８で増幅され、検波回路９
で変調成分だけを抽出して比較制御回路１０に付与され
る。The above control program (5) which determines the operating procedure of the comparison control circuit 10 is shown in FIG. The operation of this device is based on this control program and the above configuration. First, the light emitter 1 irradiates the fogging detection surface 3 with modulated red light 4 in response to an electric signal applied by the light emission drive circuit 7J, and the reflected light 6 is received by the light receiver 5. The electrical signal generated based on the light reception is amplified by the amplifier circuit 8 and then sent to the detection circuit 9.
Only the modulation component is extracted and applied to the comparison control circuit 10.
車両フロントガラスに曇りがない場合、発光器から検出
面に照射された赤外光のうち、検出面”Ｃ反射して受光
器に受光される光量は大きく、比較制御回路１０に付与
される検波信号の電圧値は高い。ところが、フロントガ
ラス内面に曇りが発生すると、照射された赤外光は検出
面３で散乱するため、受光器で受光される反射光の光量
は曇りの状態に応じて少なくなり、比較制御回路１０に
入る電圧値は低くなる。When the vehicle windshield is not cloudy, the amount of infrared light irradiated from the light emitter to the detection surface is large and is reflected by the detection surface "C" and received by the light receiver. The voltage value of the signal is high.However, when the inner surface of the windshield becomes foggy, the irradiated infrared light is scattered by the detection surface 3, so the amount of reflected light received by the receiver varies depending on the cloudy state. As a result, the voltage value entering the comparison control circuit 10 becomes lower.
比較制御回路１４はこの入力電圧値の差を判別可能なよ
うに闇値を設定値として有しており、基本的には入力電
圧値がこの設定値より低下したと（６）
きに出力信号を生して曇り除去装置１１を作動させる。The comparison control circuit 14 has a dark value as a set value so that the difference between the input voltage values can be determined, and basically, when the input voltage value falls below this set value (6), the output signal is output. The defogging device 11 is activated.
詳述すると、比較制御回路１０は図示しないキースイッ
チの投入時に、制御プログラムのステップ１００よりプ
ログラムの実行を開始し、ステップ１０１で検波回路９
から入力される電気信号の電圧値をアナログ信号からデ
ジタル信号に変換し、変換した値を一時メモリに記憶す
る。To be more specific, when a key switch (not shown) is turned on, the comparison control circuit 10 starts executing the control program at step 100, and at step 101 the detection circuit 9
Converts the voltage value of the electrical signal input from the analog signal into a digital signal, and stores the converted value in temporary memory.
次いで、ステップ１０２では、ステップ１０１で入力さ
れた最新の入力データが示す電圧値と、既に設定されて
いる設定値が示す基準電圧値との比を演算し、演算結果
が所定レベル以下、例えば７５％以下であるときは、曇
りが生じたとしてステップ１０３へ処理をすすめる。曇
りが発生しない場合は、ステップ１０１．１０２が繰り
返し実行される。Next, in step 102, the ratio between the voltage value indicated by the latest input data input in step 101 and the reference voltage value indicated by the already set setting value is calculated, and if the calculation result is below a predetermined level, for example 75 % or less, it is assumed that clouding has occurred and the process proceeds to step 103. If no clouding occurs, steps 101 and 102 are repeated.
ステップ１０３において、比較制御回路１０は量り除去
装置１１に曇り除去作動を開始させる作動信号を付すす
る。In step 103, the comparison control circuit 10 applies an activation signal to the scale removal device 11 to initiate a defogging operation.
曇り除去装置が作動することにより、やがて曇（７）
りが解消すると比較制御回路１０への入力電圧値は徐々
に高くなる。比較制御回路１０は、ステップ１０４でス
テップ１０１でと同様に入力電圧値を読み取る。次いで
ステップ１０５で、２回にわたる入力電圧値の差を演算
し、その差が所定範囲となったかどうかを判定する。ス
テップ１０４−１０５は繰り返し実行され、曇りが徐々
に消滅しやがて解消したときに、上記の差の演算結果が
所定範囲内で一定になると、ステップ１０６に処理がす
すめられる。このことは、曇りが除去されて検出面３で
の反射率が安定したことの判定を意味する。もし、曇り
が除去されても煙草の成分などが付着して入力電圧値が
当初の値に戻らないとしても、この反射率が安定すれば
、ステップ１０６にすすむことができる。As the fog removal device operates, the fog (7) eventually disappears, and the input voltage value to the comparison control circuit 10 gradually increases. The comparison control circuit 10 reads the input voltage value in step 104 in the same manner as in step 101. Next, in step 105, the difference between the two input voltage values is calculated, and it is determined whether the difference falls within a predetermined range. Steps 104-105 are repeatedly executed, and when the fogging gradually disappears and eventually disappears, and the above difference calculation result becomes constant within a predetermined range, the process proceeds to step 106. This means that it is determined that the cloudiness has been removed and the reflectance on the detection surface 3 has become stable. Even if the input voltage value does not return to its original value due to adhesion of cigarette components even after the fog is removed, if the reflectance is stabilized, it is possible to proceed to step 106.
ステップ１０６で比較制御回路１０は、曇り除去装置１
１の作動を停止させるべく作動信号の付与を停止する。In step 106, the comparison control circuit 10 controls the defogging device 1.
In order to stop the operation of 1, the application of the operation signal is stopped.
さらに比較制御回路１０は、曇りが除去されたこの時点
でステップ１０７において、検波回路９（８）
からの入力端子値を読み取る。この電圧値は、発光器１
、受光器５の集光レンズの汚れや、発光、受光素子の継
竿劣化による変化分、さらにはフロントガラス内面に付
着した塵や煙草の成分による変化分を含んでいる。従っ
てこの時の入力電圧値を設定値とすることにより、次に
曇りが付着したときにこれを基準として確実な曇り判別
をすることが可能となる。Further, the comparison control circuit 10 reads the input terminal value from the detection circuit 9(8) in step 107 at this point when the fogging is removed. This voltage value is
, changes due to dirt on the condenser lens of the light receiver 5, light emission, deterioration of the joint of the light receiving element, and changes due to dust and cigarette components adhering to the inner surface of the windshield. Therefore, by setting the input voltage value at this time as the set value, it becomes possible to reliably determine fogging based on this value the next time fogging occurs.
このため、ステップ１０８を経由して、ステ、。Therefore, via step 108, step.
プ１０９で現時点の最新の入力電圧値を新たな設定値と
して記憶する。この記憶は一時メモリになされるが、一
時メモリはキースイッチが切断されてもバックアップさ
れているため、次にキースイッチを投入した際にはステ
ップ１０２での判定に使用する設定値を保存することが
できる。In step 109, the current latest input voltage value is stored as a new set value. This memory is stored in temporary memory, but since the temporary memory is backed up even if the key switch is turned off, the setting values used for the determination in step 102 will be saved the next time the key switch is turned on. I can do it.
ステップ１０８は、曇り除去が完全になされたかを再度
チェックするために用意されたものである。ここでは、
ステップ１０７での最新の人力値が設定値に対する比と
して所定レベル、例えば９５％以上かどうかを調べるも
のとする。すなわち、（９）
素子の継竿劣化等を考慮して設定値を変更するに適当と
判断される場合にのみ、設定値の変更つまり修正がなさ
れる。一方、入力値が設定値の９５％に満たない場合は
、継部変化というより一時的な変化と見なされステップ
１０９を経ずしてステップ１０１に復帰する。従って設
定値は変更されない。Step 108 is provided to check again whether the fogging has been completely removed. here,
It is assumed that it is checked whether the latest human power value in step 107 is at a predetermined level, for example, 95% or more as a ratio to the set value. That is, (9) the set value is changed or corrected only when it is determined that it is appropriate to change the set value in consideration of element deterioration, etc. On the other hand, if the input value is less than 95% of the set value, it is regarded as a temporary change rather than a joint change, and the process returns to step 101 without passing through step 109. Therefore, the set value is not changed.
第４図ｔａ＋、（ｂｌは設定値の変更修正がなされる場
合、なされない場合をそれぞれ示すタイムチャートであ
る。第４図（ａｌは（入力電圧値／設定値）の比が１０
０％である点Ａから、曇りが発生して、曇り除去装置が
作動し、曇りが除去されたときの比Ｂが所定レベル（９
５％）を越え、設定値の変更が行われる場合を示し、第
４図（ｂｌは曇り除去装置の作動後未だ曇りが完全に除
去されないか、または何らかの事情により、所定レベル
Ｃに満たず設定値の変更がなされない場合を示す。Fig. 4 ta+, (bl are time charts showing cases in which the setting value is changed and corrected, respectively.
From point A, which is 0%, fogging occurs, the defogging device operates, and the ratio B reaches a predetermined level (9%) when the fogging is removed.
5%) and the set value is changed, and Fig. 4 (bl indicates that the fogging has not been completely removed after the fog removal device has been activated, or that the setting is lower than the predetermined level C due to some circumstances). Indicates a case where the value is not changed.
この装置において、設定値は比較制御回路１０において
バンクアンプされるため、暫く放置しておいた後にキー
スイッチを投入しときに、キース（１０）
インチ投入以前に曇りが発生していたとしても、最新の
設定値に基づいて的確に曇り除去装置を作動させること
ができる。In this device, the set value is bank-amplified in the comparison control circuit 10, so when the key switch is turned on after being left unused for a while, even if fogging has occurred before Keith (10 inches) is turned on, The defogging device can be operated accurately based on the latest setting values.
なお、上記の実施例において、制御プログラムの手順、
手法上の変形は任意になし得る。例えばステップ１０２
およびステップ１０８では、入力値と設定値との比を計
算し、この比の大小により曇りの有無を検出するように
しているが、計算手法として減算を用い、その結果得ら
れる差の大小を所定値と比較するようにしてもよい。な
お、この際、演算結果の差と比較されるべき所定値が、
設定値と比例関係となるように逐次計算するようにすれ
ば、結局前記実施例と同様に比率を演算するものとなる
。またステップ１０Ｂにおける所定レベルとは、１００
％を越える値との間で一定の幅を持たセで、例えば９５
％〜１０５％としてもよい。こうした制限はデータとし
ての信用のない値を設定値としない利点がある。In addition, in the above embodiment, the procedure of the control program,
Any variations in method may be made. For example step 102
In step 108, the ratio between the input value and the set value is calculated, and the presence or absence of cloudy weather is detected based on the magnitude of this ratio. Subtraction is used as the calculation method, and the magnitude of the resulting difference is determined by It may also be compared with the value. In addition, at this time, the predetermined value to be compared with the difference between the calculation results is
If the calculation is performed sequentially so as to be in a proportional relationship with the set value, the ratio will be calculated in the same way as in the above embodiment. Further, the predetermined level in step 10B is 100
With a certain width between the value exceeding %, for example 95
% to 105%. Such restrictions have the advantage of not setting unreliable values as data.
第１図は本発明の一実施例における発光器と受光器の取
りつけを示す車両室内の斜視図、第２図は第１図に示す
発光器、受光器と組み合わされる検出回路を示す電気結
線図、第３図は第２図図示のマイクロコンピュータの制
御プログラムを示すフローチャート、第４図は作動状態
を示すタイツ・チャートである。
１・・・発光器、３・・・検出面、５・・・受光器、１
０・・・比較制御回路、１１・・・曇り除去装置。
代理人弁理士 岡 部 隆
竿３図
ス づ、 −ト ｉｏ。
電 氏 イ直の 昏旭好耳スソ １０１り前 脅すイ夛
１０２
、嘔ｐ１已比１寥Ｐ斤定し〜・−８０
７５７−”す１７９
ＥＳ
４回） リ Ｐ奪 櫨文 ド＋ｙ’ｉ ｔ９ １０３紫
氏イ直の言九と取り １０４
９０〜９５．Ｚ 、すＹ宇軟１：１
電しゼイ直１言 −噴ｉヒｔ＞、８”＼ ゝ０？
ＥＳ
Ａ ＩＩ Ｖ＆ 婁 ｋｆｈ ７ １０６特開昭ＧＯ−
２７８４２（５）
第４図
ｃつ）
（ｂ）
□１０．：８１
峙関FIG. 1 is a perspective view of the interior of a vehicle showing the installation of a light emitter and a light receiver in an embodiment of the present invention, and FIG. 2 is an electrical wiring diagram showing a detection circuit combined with the light emitter and light receiver shown in FIG. 1. , FIG. 3 is a flowchart showing the control program of the microcomputer shown in FIG. 2, and FIG. 4 is a tights chart showing the operating state. 1... Emitter, 3... Detection surface, 5... Light receiver, 1
0... Comparison control circuit, 11... Defog removal device. Representative Patent Attorney Takashi Okabe 3 pictures. Den Mr. I direct's coma asahi good ear suso 101 before threatening I 夛 102, vo p1 ratio 1 her P 斤Established~・-80 757-"S179 ES 4 times) ri P robbing 櫨文 do + y'i t9 103 Murasaki I Nao's Words Nine and Tori 104 90~95.Z, Su Y U Soft 1:1 Denshi Zei Nao 1 Word - Fuu I Hit>, 8"\ ゝ0? ES A II V & Lou kfh 7 106 Tokukai Sho GO-
27842 (5) Figure 4) (b) □10. :81 Chiseki
Claims (1)
射する投光器と前記風防板で反射された反射光を受光す
る受光器とを備えて、この受光器の受光信号の大きさに
より前記風防板における曇り状態を判別するようにした
車両用曇り検出装置であって、前記受光信号の大きさを
所定の設定値と比較して検出信号を生じる比較手段を設
けるとともに、前記設定値を前記受光信号の変化が安定
しているときにその受光信号に対応して修正する修正手
段を設けてなる車両用曇り検出装置。(Equipped with a projector that emits infrared light such that it is reflected on the inner surface of the windshield of the vehicle, and a receiver that receives the reflected light reflected by the windshield, and the magnitude of the light reception signal of this receiver is A fogging detection device for a vehicle is configured to determine a cloudy state on the windshield plate by comparing the magnitude of the received light signal with a predetermined setting value to generate a detection signal; A fogging detection device for a vehicle, comprising a correction means for correcting the change of the received light signal in response to the received light signal when the change in the received light signal is stable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13637483A JPH068787B2 (en) | 1983-07-25 | 1983-07-25 | Fog detection device for vehicle |
| US06/634,360 US4636643A (en) | 1983-07-25 | 1984-07-25 | Fog detecting apparatus for use in vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13637483A JPH068787B2 (en) | 1983-07-25 | 1983-07-25 | Fog detection device for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6027842A true JPS6027842A (en) | 1985-02-12 |
| JPH068787B2 JPH068787B2 (en) | 1994-02-02 |
Family
ID=15173666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13637483A Expired - Lifetime JPH068787B2 (en) | 1983-07-25 | 1983-07-25 | Fog detection device for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068787B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737629A (en) * | 1985-05-21 | 1988-04-12 | Nippondenso Co., Ltd. | Automatic windscreen defogger |
| JP2007145214A (en) * | 2005-11-29 | 2007-06-14 | Denso Corp | Window fog detection device |
| JP2013071518A (en) * | 2011-09-27 | 2013-04-22 | Niles Co Ltd | Raindrop detecting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4923685A (en) * | 1972-06-23 | 1974-03-02 | ||
| JPS4932685U (en) * | 1972-06-22 | 1974-03-22 |
-
1983
- 1983-07-25 JP JP13637483A patent/JPH068787B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4932685U (en) * | 1972-06-22 | 1974-03-22 | ||
| JPS4923685A (en) * | 1972-06-23 | 1974-03-02 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737629A (en) * | 1985-05-21 | 1988-04-12 | Nippondenso Co., Ltd. | Automatic windscreen defogger |
| JP2007145214A (en) * | 2005-11-29 | 2007-06-14 | Denso Corp | Window fog detection device |
| JP2013071518A (en) * | 2011-09-27 | 2013-04-22 | Niles Co Ltd | Raindrop detecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH068787B2 (en) | 1994-02-02 |
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