JPS62138726A - Liquid level detecting device - Google Patents
Liquid level detecting deviceInfo
- Publication number
- JPS62138726A JPS62138726A JP28009985A JP28009985A JPS62138726A JP S62138726 A JPS62138726 A JP S62138726A JP 28009985 A JP28009985 A JP 28009985A JP 28009985 A JP28009985 A JP 28009985A JP S62138726 A JPS62138726 A JP S62138726A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- liquid
- receiver
- level
- reflecting plate
- 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.)
- Pending
Links
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は、風呂釜等の水位を検知する液位検知装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid level detection device for detecting the water level of a bathtub or the like.
従来の液位検知装置は、電極、水圧感知、流量感知等で
直接液に接触して液位を検知しており、液に接触するこ
となく液位を検知する液位検知装置はなかった。Conventional liquid level detection devices detect the liquid level by directly contacting the liquid using electrodes, water pressure sensing, flow rate sensing, etc., and there is no liquid level detection device that can detect the liquid level without coming into contact with the liquid.
この発明の目的は、直接液に接触することなく液位を検
知することができる液位検知装置を提供することである
。An object of the present invention is to provide a liquid level detection device that can detect the liquid level without directly contacting the liquid.
この発明の液位検知装置は、液溜槽と、この液溜槽内に
貯溜する液の貯溜目標液面において前記液溜槽の側壁に
設けた反射板と、前記貯溜目標液面より上方に設けられ
前記反射板に向けて電磁波または音波を発信する発信器
と、前記貯溜目標液面より上方に設けられ前記反射板に
て反射した前記電磁波または音波を受信する受信器と、
この受信器にて受信した前記電磁波または音波の強度を
設定レベル値と比較して液位が前記貯溜目標液面に達し
たか否かを検出する検出手段とを備えたものである。The liquid level detection device of the present invention includes a liquid storage tank, a reflecting plate provided on a side wall of the liquid storage tank at a storage target liquid level of the liquid stored in the liquid storage tank, and a reflection plate provided above the storage target liquid level and the reflection plate provided above the storage target liquid level. a transmitter that emits electromagnetic waves or sound waves toward a reflecting plate; a receiver that is provided above the target storage liquid level and receives the electromagnetic waves or sound waves reflected by the reflecting plate;
The apparatus further includes a detection means for comparing the intensity of the electromagnetic wave or sound wave received by the receiver with a set level value to detect whether the liquid level has reached the target storage liquid level.
この発明の構成によれば、液溜槽内の液位が反射板以下
であると、発信器から発信された電磁波または音波が反
射板にて反射し受信器にて受信され検出手段にてその強
度が設定レベル値以上であると検出されて、液位が反射
板取付は部位（貯溜目標液面）に達していないことを検
知する。また、液位が反射板以上になると、発信器から
発信された電磁波または音波が液中を進んで反射板で反
射されたり液面で反射または屈折して反射板に達しなか
ったりして、受信器で受信される電磁波または音波の強
度が設定レベル値以下となり、それを検出手段で検出し
て液位が反射板取付は部位（貯溜目標液面）に達したこ
とを検知する。According to the structure of the present invention, when the liquid level in the liquid storage tank is below the reflecting plate, the electromagnetic waves or sound waves emitted from the transmitter are reflected by the reflecting plate, are received by the receiver, and the intensity is detected by the detecting means. is detected to be equal to or higher than the set level value, and it is detected that the liquid level has not reached the point where the reflector plate is attached (target storage liquid level). Additionally, when the liquid level exceeds the reflector, the electromagnetic waves or sound waves emitted from the transmitter may travel through the liquid and be reflected by the reflector, or may be reflected or refracted at the liquid surface and may not reach the reflector, causing reception. When the intensity of the electromagnetic waves or sound waves received by the device falls below a set level value, the detection means detects this and detects that the liquid level has reached the location where the reflector plate is attached (target storage liquid level).
このように、液位が貯溜目標液面に達したが否かを液面
より上方に設けた発信器から発信された電磁波または音
波を受信器で受信して検知でき、直接液に接触すること
なく液位を検知できる。In this way, it is possible to detect whether the liquid level has reached the target storage liquid level by receiving electromagnetic waves or sound waves emitted from a transmitter placed above the liquid level with a receiver, and directly contacting the liquid. The liquid level can be detected without any problems.
実施例
この発明の一実施例を第１図ないし第６図に基づいて説
明する。第１図ないし第３図において本実施例の概要を
説明し、第４図ないし第６図に本実施例の液位検知装置
を風呂釜に通用した構造を説明する。すなわち、本実施
例の液位検知装置は、第１図に示すように、液溜槽１０
と、この液溜槽１０内に貯溜する液２２の貯溜目標液面
において前記液溜槽１０の側壁１２に設けた反射板１４
と、前記貯溜目標液面より上方に設けられ前記反射板１
４に向けて電磁波または音波ωを発信する発信器１６と
、前記貯溜目標液面より上方に設けられ前記反射板１４
にて反射した前記電磁波または音波ωを受信する受信器
１８と、この受信器１８にて受信した前記Ｍ磁波または
音波ωの強度を設定レベル値と比較して液位が前記貯溜
目標液面に達したか否かを検出する検出手段２０とを備
えたものである。Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 6. An outline of this embodiment will be explained with reference to FIGS. 1 to 3, and a structure in which the liquid level detection device of this embodiment is applied to a bathtub will be explained in FIGS. 4 to 6. That is, the liquid level detection device of this embodiment has a liquid storage tank 10 as shown in FIG.
and a reflecting plate 14 provided on the side wall 12 of the liquid storage tank 10 at the target storage level of the liquid 22 stored in the liquid storage tank 10.
and the reflection plate 1 provided above the storage target liquid level.
a transmitter 16 that emits an electromagnetic wave or a sound wave ω toward the target liquid level; and a reflector plate 14 that is provided above the target reservoir liquid level.
A receiver 18 receives the electromagnetic wave or sound wave ω reflected by the receiver 18, and the intensity of the M magnetic wave or sound wave ω received by the receiver 18 is compared with a set level value to ensure that the liquid level reaches the target storage liquid level. It is equipped with a detection means 20 for detecting whether or not the limit has been reached.
電磁波ωとしては、レーザ光や赤外線等の光が用いられ
る。この場合、発信５１６にはランプやレーザダイオー
ド等が使用され、受信器１８にはＣｄＳ、ホトダイオー
ド、ホトトランジスタ等が使用される。As the electromagnetic wave ω, light such as laser light or infrared light is used. In this case, a lamp, a laser diode, or the like is used for the transmitter 516, and a CdS, a photodiode, a phototransistor, or the like is used for the receiver 18.
また、音波（超音波を含む）ωの場合、発信器１６には
音波発振器が使用され、受信器１日にはマイクロホンが
使用される。Further, in the case of sound waves (including ultrasonic waves) ω, a sound wave oscillator is used as the transmitter 16, and a microphone is used as the receiver 1.
第１図は、液位が反射板１４（すなわち、貯溜目標液面
）に達しておらず、発信器１６から発信された電磁波ま
たは音波ωが反射板１４で反射して受信器１８で受信さ
れる状態を示した概略図である。In FIG. 1, the liquid level has not reached the reflecting plate 14 (that is, the target storage liquid level), and the electromagnetic wave or sound wave ω transmitted from the transmitter 16 is reflected by the reflecting plate 14 and received by the receiver 18. FIG.
第２図は、発信器１６．受信器１８および検出器手段２
０と反射板１４との関係を示した概略図である。なお、
反射Ｆｉ１４は貯溜する液２２で腐食しない材質で形成
する。FIG. 2 shows the transmitter 16. Receiver 18 and detector means 2
FIG. 2 is a schematic diagram showing the relationship between 0 and a reflecting plate 14. FIG. In addition,
The reflection Fi 14 is made of a material that is not corroded by the liquid 22 stored therein.
第３図は、液位が反射板１４（貯溜目標液面）に達し、
発信器１６から発信された電磁波または音波ωが液面２
４にて反射あるいは屈折し、反射板１４に達しない状態
を示した概略図である。Figure 3 shows that when the liquid level reaches the reflecting plate 14 (target storage liquid level),
Electromagnetic waves or sound waves ω emitted from the transmitter 16 reach the liquid level 2.
4 is a schematic diagram illustrating a state in which the light is reflected or refracted at 4 and does not reach the reflecting plate 14. FIG.
次に、第４図ないし第６図を用いてこの液位検知装置を
風呂等に通用した場合について説明する。Next, a case where this liquid level detection device is used in a bath or the like will be explained using FIGS. 4 to 6.
第４図において、３０は風呂等からなる液溜槽であり、
液溜槽３０の側壁３２の内面に反射板３４が取付けられ
ている。反射板３４は第６図に示すように構成されてい
る。すなわち、同図において、基板３６の裏面にねじ３
８で吸盤４０を取付けると共に、基板３６の表面にはそ
れぞれ椀状の支持片４２を有した一対の支持具４４をね
じ４６で固定する。一対の支持具４４はねじ４８にて連
結されている。そして、表面が反射面となる鏡５０を、
その裏面に固設した取付は球体５２を一対の支持具４４
の支持片４２で支持して上下左右の微調整可能に取付け
る。さらに、鏡５０を透明のカバー５４にて覆う、この
ように構成された反射板３４をその吸盤４０を液溜槽３
０の側壁３２の内面の貯溜目標液面に吸着して取付ける
。In FIG. 4, 30 is a liquid storage tank consisting of a bath, etc.
A reflecting plate 34 is attached to the inner surface of the side wall 32 of the liquid storage tank 30. The reflecting plate 34 is constructed as shown in FIG. That is, in the figure, screws 3 are attached to the back surface of the board 36.
At 8, the suction cup 40 is attached, and a pair of supports 44 each having a bowl-shaped support piece 42 is fixed to the surface of the substrate 36 with screws 46. The pair of supports 44 are connected by screws 48. Then, a mirror 50 whose surface is a reflective surface,
The sphere 52 is attached to a pair of supports 44 on the back side.
It is supported by a support piece 42 and mounted so that it can be finely adjusted vertically and horizontally. Furthermore, the mirror 50 is covered with a transparent cover 54, and the reflector 34 configured as described above is attached to the suction cup 40 of the liquid reservoir 3.
It is attached by adsorption to the target storage liquid level on the inner surface of the side wall 32 of 0.
また、第４図において、液溜槽３０の外部上方に反射板
３４に面してコントローラ本体５６が設置されている。Further, in FIG. 4, a controller main body 56 is installed outside and above the liquid storage tank 30, facing the reflection plate 34.
コントローラ本体５６は、反射板３４に面した表側が制
御装置５日となり裏側が外部駆動装置６０となっている
。制御装置５８には反射板３４に対向して発信器６２が
内蔵されていると共に、発信器６２から発信されて反射
板３４で反射した電磁波または音波を受信する受信器６
４が内蔵されている。発信器６２および受信器６４の構
造は第５図に示すように構成されている。すなわち、発
信部（または受信部）６６の後端に取付は球体６８を設
け、この取付は球体６８を制御装置５８内に固設した一
対の支持具７０の椀状の支持片７２にて支持している。In the controller main body 56, the front side facing the reflection plate 34 is the control device 5, and the back side is the external drive device 60. The control device 58 has a built-in transmitter 62 facing the reflector 34, and a receiver 6 that receives electromagnetic waves or sound waves transmitted from the transmitter 62 and reflected by the reflector 34.
4 is built-in. The structures of the transmitter 62 and receiver 64 are as shown in FIG. That is, a sphere 68 is attached to the rear end of the transmitter (or receiver) 66, and the sphere 68 is supported by a bowl-shaped support piece 72 of a pair of supports 70 fixed in the control device 58. are doing.
一対の支持具７０はねじ７４にて連結されており、発信
部（受信部）６６は上下左右の微調整が可能となってい
る。The pair of supports 70 are connected by screws 74, and the transmitter (receiver) 66 can be finely adjusted vertically and horizontally.
さらに、第４図において、液溜槽３０には給水管７６が
接続されている。給水管７６の途中には電磁弁７日が取
付けられている。電磁弁７８は制御装置５８に設けた給
水スイッチ８０をオンにすることにより弁が開き給水が
始まる。なお、給水スイッチ８０をオンにすると、発信
器６ｚから電磁波または音波ωが発信されるようになっ
ている。Furthermore, in FIG. 4, a water supply pipe 76 is connected to the liquid storage tank 30. A solenoid valve 7 is installed in the middle of the water supply pipe 76. When the water supply switch 80 provided in the control device 58 is turned on, the electromagnetic valve 78 opens and water supply starts. Note that when the water supply switch 80 is turned on, an electromagnetic wave or a sound wave ω is transmitted from the transmitter 6z.
また、制御装置５８内には、受信器６４にて受信した電
磁波または音波ωの強度を設定レベル値と比較する検出
手段（図示せず）が内蔵されており、さらに検出手段に
て検出した電磁波または音波ωの強度が設定レベル値以
下の場合に発信器６２からの発信を停止する停止手段（
図示せず）と、さらに設定レベル値以下であることを外
部駆動装置６０へ送信する送信手段（図示せず）が組み
込まれている。また、外部駆動装置６０内には、給水ス
イッチ８０がオンの場合に電磁弁７８を開く信号を送る
と共に、受信した電磁波または音波ωが設定レベル値以
下であるという制御装置５８からの信号を受けて？ｌｉ
ｍ弁７８弁閉８る信号を送る各手段が内蔵されている。Further, the control device 58 includes a detection means (not shown) that compares the intensity of the electromagnetic wave or sound wave ω received by the receiver 64 with a set level value, and furthermore, the electromagnetic wave detected by the detection means Alternatively, a stopping means (
(not shown) and a transmitting means (not shown) for transmitting to the external drive device 60 that the level is below the set level value. The external drive device 60 also sends a signal to open the electromagnetic valve 78 when the water supply switch 80 is on, and also receives a signal from the control device 58 indicating that the received electromagnetic wave or sound wave ω is below a set level value. hand? li
Each means for sending a signal to close the valve 78 is built-in.
次に、給水（給湯）動作について説明する。Next, the water supply (hot water supply) operation will be explained.
■ 給水スイッチ８０をオンにし、電磁弁７８を開いて
給水を開始すると同時に、発信器６２から電磁波または
音波ωを発信する。なお、発信される電磁波または音波
ωは一定間隔置きあるいは連続的に発信する。(2) Turn on the water supply switch 80 and open the solenoid valve 78 to start water supply, and at the same time, the transmitter 62 emits electromagnetic waves or sound waves ω. Note that the electromagnetic waves or sound waves ω are transmitted at regular intervals or continuously.
■ 水位が反射板３４以下である間は、発信器６２から
発信された電磁波または音波ωが反射板３４にて反射し
受信器６４にて受信される。そして、検出手段にて受信
した電磁波または音波ωの強度が設定レベル値以上であ
ることを検出し、そのまま給水を続ける。(2) While the water level is below the reflecting plate 34, electromagnetic waves or sound waves ω transmitted from the transmitter 62 are reflected by the reflecting plate 34 and received by the receiver 64. Then, the detecting means detects that the intensity of the received electromagnetic wave or sound wave ω is equal to or higher than the set level value, and continues water supply.
■ 水位が反射板３４以上になると、電磁波または音波
ωが第３図のように水面で反射したりあるいは屈折して
反射板３４に達しなかったり、また反射板３４に達して
反射はするが強度が低下する。このため、受信器６４に
は強度の弱い電磁波または音波ωが到達したり、あるい
はまったく到達しなくなる。いずれにしろ、電磁波また
は音波ωの強度が設定レベル値以下であるということを
検出手段にて検出し、外部駆動装置６０を介して電磁弁
７Ｂを閉じて給水を停止すると共に、発信器６２からの
電磁波または音波ωの発信を停止する。このようにして
、液位ネ★知装置が自動給水装面の水位センサとしての
役割を果す。■ When the water level exceeds the reflector plate 34, electromagnetic waves or sound waves ω may be reflected or refracted on the water surface and not reach the reflector plate 34 as shown in Figure 3, or may reach the reflector plate 34 and be reflected but with a strong intensity. decreases. Therefore, electromagnetic waves or sound waves ω of low intensity reach the receiver 64, or do not reach the receiver 64 at all. In any case, when the detection means detects that the intensity of the electromagnetic wave or the sound wave ω is below the set level value, the solenoid valve 7B is closed via the external drive device 60 to stop the water supply, and the transmitter 62 stop transmitting electromagnetic waves or sound waves ω. In this way, the liquid level sensing device serves as a water level sensor for the automatic water system.
このように構成された液位検知装置によると、第１図に
示すように、液溜槽内１０の液位が反射板１４以下であ
ると、発信器１６から発信された電磁波または音波ωが
反射板１４にて反射し受信器１日にて受信され検出手段
２０にてその強度が設定レベル値以上であると検出され
て、液位が反射板工４の取付は部位（貯溜目標液面）に
達して′いないことを検知する。また、第３図に示すよ
うに、液位が反射板１４以上になると、発信器１６から
発信された電磁波または音波ωが液２２中を進んで反射
板１４で反射されたり液面で反射または屈折して反射板
１４に達しなかったりして、受信器１８で受信される電
磁波または音波ωの強度が設定レベル値以下となり、そ
れを検出手段２０で検出して液位が反射板１４の取付は
部位（貯溜目標液面）に達したことを検知する。According to the liquid level detection device configured in this way, as shown in FIG. It is reflected by the plate 14 and received by the receiver 1, and the detection means 20 detects that the intensity is higher than the set level value, and the liquid level is set at the location where the reflection plate 4 is installed (reservation target liquid level). It is detected that the current level has not been reached. Further, as shown in FIG. 3, when the liquid level exceeds the reflection plate 14, the electromagnetic wave or sound wave ω transmitted from the transmitter 16 travels through the liquid 22 and is reflected by the reflection plate 14 or reflected from the liquid surface. When the intensity of the electromagnetic wave or sound wave ω received by the receiver 18 falls below the set level value due to refraction and not reaching the reflection plate 14, the detection means 20 detects this and the liquid level is adjusted to the level at which the reflection plate 14 is attached. detects that the target liquid level has been reached.
このように、液位が貯溜目標液面に達したか否かを液面
より上方に設けた発信器１６から発信された電磁波また
は音波ωを受信器１８で受信して検知でき、直接液２２
に接触することなく液位を検知できる。In this way, it is possible to detect whether the liquid level has reached the storage target liquid level by receiving electromagnetic waves or sound waves ω transmitted from the transmitter 16 provided above the liquid level with the receiver 18, and directly detect the liquid 22.
The liquid level can be detected without contacting the liquid.
また、第４図ないし第６図における風呂釜に通用した例
においては、反射板３４が吸盤４０で液溜槽３０の側壁
３２に取付けられているので、反射板３４の取付は高さ
を変更して貯溜目標液面を自由に変えることができる。In addition, in the examples shown in FIGS. 4 to 6 that are applicable to bathtubs, the reflecting plate 34 is attached to the side wall 32 of the liquid storage tank 30 with a suction cup 40, so the mounting height of the reflecting plate 34 must be changed. The target liquid level can be changed freely.
しかも、反射板３４の鏡５０および発信器６２．受信器
６４がそれぞれ取付は球体５２．６８を介して取付けら
れており、上下左右の微調整が可能となっている。この
ため、反射Ｆｉ３４．発信器６２および受信器６４の指
向性が高くなり、液位検知精度が向上する。Furthermore, the mirror 50 of the reflector 34 and the transmitter 62. The receivers 64 are each attached via spheres 52 and 68, allowing for fine adjustment in the vertical and horizontal directions. For this reason, the reflection Fi34. The directivity of the transmitter 62 and the receiver 64 is increased, and the accuracy of liquid level detection is improved.
さらに、従来の水圧感知式や流量感知式に比べて装置が
簡単で風呂のように容積が小さい場合でも精度良く検知
できる。しかも、従来の電極式では直接液に接触するた
め電気分解により電極の回りに電解質が析出し、精度が
落ちるという問題があったが、そういう問題もなくなる
。Furthermore, the device is simpler than conventional water pressure sensing type or flow rate sensing type, and can detect even small volumes like baths with high accuracy. In addition, the conventional electrode type had the problem that electrolyte was deposited around the electrode due to electrolysis due to direct contact with the liquid, resulting in a decrease in accuracy, but this problem is no longer present.
なお、検知する液としては水（湯）以外の液であっても
よい。Note that the liquid to be detected may be a liquid other than water (hot water).
この発明の液位検知装置によれば、液位が貯溜目標液面
に達したか否かを液面より上方に設けた発信器から発信
された電磁波または音波を受信器で受信して検知でき、
直接液に接触することなく液位を検知できるという効果
がある。According to the liquid level detection device of the present invention, it is possible to detect whether the liquid level has reached the storage target liquid level by receiving electromagnetic waves or sound waves emitted from a transmitter provided above the liquid level with a receiver. ,
The effect is that the liquid level can be detected without direct contact with the liquid.
第１図はないし第３図はこの発明の一実施例の概略図、
第４図は風呂釜に通用した場合の斜視図、第５図はその
発信器（受信器）の分解斜視図、第６図はその反射板の
分解斜視図である。
１０・・・液溜槽、１２・・・側壁、１４・・・反射板
、１６・・・発信器、１８・・・受信器、２ｏ・・・検
出手段、２２・・・液、ω・・・電磁波または音波
第１図
第３図
第４図
第６図1 to 3 are schematic diagrams of an embodiment of the present invention,
FIG. 4 is a perspective view of the device when it is used in a bathtub, FIG. 5 is an exploded perspective view of its transmitter (receiver), and FIG. 6 is an exploded perspective view of its reflector. DESCRIPTION OF SYMBOLS 10... Liquid storage tank, 12... Side wall, 14... Reflector, 16... Transmitter, 18... Receiver, 2o... Detection means, 22... Liquid, ω...・Electromagnetic waves or sound waves Figure 1 Figure 3 Figure 4 Figure 6
Claims (1)
おいて前記液溜槽の側壁に設けた反射板と、前記貯溜目
標液面より上方に設けられ前記反射板に向けて電磁波ま
たは音波を発信する発信器と、前記貯溜目標液面より上
方に設けられ前記反射板にて反射した前記電磁波または
音波を受信する受信器と、この受信器にて受信した前記
電磁波または音波の強度を設定レベル値と比較して液位
が前記貯溜目標液面に達したか否かを検出する検出手段
とを備えた液位検知装置。A liquid storage tank, a reflection plate provided on a side wall of the liquid storage tank at a target storage liquid level of the liquid stored in the liquid storage tank, and an electromagnetic wave or a sound wave directed toward the reflection plate provided above the storage target liquid level. a transmitter that emits, a receiver that is provided above the target reservoir liquid level and receives the electromagnetic waves or sound waves reflected by the reflector, and a set level for the intensity of the electromagnetic waves or sound waves received by the receiver. A liquid level detection device comprising a detection means for comparing the liquid level with a value and detecting whether the liquid level has reached the target storage liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28009985A JPS62138726A (en) | 1985-12-12 | 1985-12-12 | Liquid level detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28009985A JPS62138726A (en) | 1985-12-12 | 1985-12-12 | Liquid level detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62138726A true JPS62138726A (en) | 1987-06-22 |
Family
ID=17620301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28009985A Pending JPS62138726A (en) | 1985-12-12 | 1985-12-12 | Liquid level detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62138726A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010210623A (en) * | 2009-03-10 | 2010-09-24 | Nestec Sa | Optical level detector for beverage machine |
| WO2011011213A1 (en) * | 2009-07-22 | 2011-01-27 | Eastman Kodak Company | Developer liquid level sensor |
| DE102019208563A1 (en) * | 2019-06-12 | 2020-12-17 | Volkswagen Aktiengesellschaft | Optical liquid sensor and method for optical detection of liquids |
-
1985
- 1985-12-12 JP JP28009985A patent/JPS62138726A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010210623A (en) * | 2009-03-10 | 2010-09-24 | Nestec Sa | Optical level detector for beverage machine |
| WO2011011213A1 (en) * | 2009-07-22 | 2011-01-27 | Eastman Kodak Company | Developer liquid level sensor |
| CN102472658A (en) * | 2009-07-22 | 2012-05-23 | 伊斯曼柯达公司 | Developer liquid level sensor |
| US8283647B2 (en) | 2009-07-22 | 2012-10-09 | Eastman Kodak Company | Developer liquid level sensor |
| DE102019208563A1 (en) * | 2019-06-12 | 2020-12-17 | Volkswagen Aktiengesellschaft | Optical liquid sensor and method for optical detection of liquids |
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