JP5283285B2 - Water level measuring device - Google Patents
Water level measuring device Download PDFInfo
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- JP5283285B2 JP5283285B2 JP2010159121A JP2010159121A JP5283285B2 JP 5283285 B2 JP5283285 B2 JP 5283285B2 JP 2010159121 A JP2010159121 A JP 2010159121A JP 2010159121 A JP2010159121 A JP 2010159121A JP 5283285 B2 JP5283285 B2 JP 5283285B2
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- water level
- level detection
- water
- light
- detection tube
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Abstract
Description
この発明は、界面における光の反射を利用した水位測定装置に関する。 The present invention relates to a water level measuring apparatus using light reflection at an interface.
従来、水位測定装置には、超音波を使用したものなどがある。（例えば、特許文献１参照。） Conventionally, water level measuring devices include those using ultrasonic waves. (For example, refer to
超音波を利用するものにあっては、音速の気温による変化を考慮する必要がある。
また、水位が変化しつつある場合には、音速が遅いため、測定値にタイムラグが生じる。In the case of using ultrasonic waves, it is necessary to consider the change in the sound speed due to the temperature.
Further, when the water level is changing, the sound speed is slow, so a time lag occurs in the measured value.
本発明は、測定精度が高く、水位の変化にもすばやく応答するコンパクトな水位測定装置を実現することを目的としている。 An object of the present invention is to realize a compact water level measuring device that has high measurement accuracy and responds quickly to changes in the water level.
本発明の水位測定装置は、水位を測定したい容器と上部と下部で連結された親水性が高いガラスなどの透明な材質でできた水位検出管の下部又は上部から管内に光を照射し、水位検出管の側面に取り付けたイメージセンサで水位検出管の上端から下端までの明るさを読み取り、上方で最も強く光を感じた位置の近辺に水面があるとして水位を測定する構成とした。 The water level measuring device of the present invention irradiates light into the pipe from the lower or upper part of a water level detection tube made of a transparent material such as glass having high hydrophilicity connected to a container for measuring the water level at the upper and lower parts. The brightness from the upper end to the lower end of the water level detection tube is read by an image sensor attached to the side surface of the detection tube, and the water level is measured assuming that there is a water surface near the position where the light is felt most strongly above.
本発明の水位測定装置は、光を使用するため超音波を使用するものより応答性が速い。
また、イメージセンサで緻密に光の強度分布を把握することができるため、精密な測定が可能である。Since the water level measuring device of the present invention uses light, the response is faster than that using ultrasonic waves.
Further, since the intensity distribution of light can be grasped precisely by the image sensor, precise measurement is possible.
以下、本発明の水位測定装置の実施の形態を実施例により説明する。 Hereinafter, embodiments of the water level measuring apparatus of the present invention will be described with reference to examples.
図１は、本発明の水位測定装置の実施例を示す側面断面図である。 FIG. 1 is a side sectional view showing an embodiment of the water level measuring device of the present invention.
水位検出管１の下側にある照射部２から水位検出管１内に照射された光は水と水位検出管の境界、水位検出管と空気との境界及び水と空気との境界で屈折・反射し、水位検出管の外側に出た光はイメージセンサ６で捉えられる。 The light radiated into the water
イメージセンサ６で捉えられる光は、水が表面張力により水位検出管１の壁面に沿って引き上げられている部分で強く、それより上側では極端に弱く、下側では緩やかに弱くなっていく。 The light captured by the image sensor 6 is strong at a portion where water is pulled up along the wall surface of the water
イメージセンサ６からの信号は、信号処理回路で上方での光の強さのピークの位置が求められ、近似的にその位置に水面があるとして水位が決定される。 As for the signal from the image sensor 6, the position of the peak of the intensity of light above is obtained by the signal processing circuit, and the water level is determined assuming that the water surface is approximately at that position.
照射部を上側に設けても、下側で光を上方に反射させれば、同じ結果が得られる。 Even if the irradiation unit is provided on the upper side, the same result can be obtained if the light is reflected upward on the lower side.
１ 水位検出管
２ 照射部
３ 発光体
４ 水
５ 水面
６ イメージセンサ
１１ 光路１
１２ 光路２
１３ 光路３
１４ 光路４
１５ 光路５DESCRIPTION OF
12 Optical path 2
13 Optical path 3
14
15
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010159121A JP5283285B2 (en) | 2010-06-24 | 2010-06-24 | Water level measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010159121A JP5283285B2 (en) | 2010-06-24 | 2010-06-24 | Water level measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2012008111A JP2012008111A (en) | 2012-01-12 |
| JP5283285B2 true JP5283285B2 (en) | 2013-09-04 |
Family
ID=45538807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010159121A Expired - Fee Related JP5283285B2 (en) | 2010-06-24 | 2010-06-24 | Water level measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5283285B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5709785B2 (en) * | 2012-03-12 | 2015-04-30 | 三菱電機株式会社 | refrigerator |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4322395Y1 (en) * | 1967-10-26 | 1968-09-19 | ||
| JPS5180154U (en) * | 1974-12-20 | 1976-06-25 | ||
| JPS60200127A (en) * | 1984-03-23 | 1985-10-09 | Suntory Ltd | Method and device for measuring liquid level |
| JPS60200126A (en) * | 1984-03-23 | 1985-10-09 | Suntory Ltd | Method and device for measuring liquid level |
| JPS60200128A (en) * | 1984-03-23 | 1985-10-09 | Suntory Ltd | Measuring method of liquid level |
| JPH0711441B2 (en) * | 1989-09-11 | 1995-02-08 | 大正製薬株式会社 | Liquid level inspection device |
| JPH10332460A (en) * | 1997-06-03 | 1998-12-18 | Kansai Electric Power Co Inc:The | Liquid level gage |
| JP2000193511A (en) * | 1998-12-28 | 2000-07-14 | Kirin Machinery Kk | Liquid level detector for ampule |
| JP4092312B2 (en) * | 2004-07-13 | 2008-05-28 | アロカ株式会社 | Interface detection device and method, volume measuring device |
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2010
- 2010-06-24 JP JP2010159121A patent/JP5283285B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012008111A (en) | 2012-01-12 |
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