JP5257625B2 - Density measurement function with the liquid level measuring device - Google Patents

Density measurement function with the liquid level measuring device Download PDF

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JP5257625B2
JP5257625B2 JP2010136930A JP2010136930A JP5257625B2 JP 5257625 B2 JP5257625 B2 JP 5257625B2 JP 2010136930 A JP2010136930 A JP 2010136930A JP 2010136930 A JP2010136930 A JP 2010136930A JP 5257625 B2 JP5257625 B2 JP 5257625B2
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liquid level
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岡庭弘幸
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株式会社タツノ
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本発明は、給油設備の燃料貯蔵容器の燃料の密度を検出することができる液面測定装置に関する。 The invention relates to a liquid level measuring device capable of detecting the density of the fuel in the fuel reservoir of the fuel supply facility.

給油設備の燃料貯蔵容器の燃料の密度を検出する装置は、例えば特許文献1に見られるように駆動体と、この駆動体に係止し、自身の弾性変位が駆動体の駆動力を示す尺度であるバネと、バネの弾性変位を取得するための磁歪位置計測システムとより構成されている。 Measure of apparatus for detecting the density of the fuel in the fuel reservoir of the fuel supply facility includes a driving member, for example, as seen in Patent Document 1, engaged with the drive member, its elastic deformation is the driving force of the driver a spring is being more configuration and magnetostrictive position measurement system for obtaining elastic displacement of the spring.

ヨーロッパ特許第1881316号公報 European Patent No. 1881316 Publication 特許第3307610号公報 Patent No. 3307610 Publication

しかしながら、密度測定のためだけにマグネットを有するストッパを余分に必要となるため構造が複雑になるという問題がある。 However, there is a problem that the structure to become only the additionally required a stopper having a magnet for density measurement becomes complicated.
本発明はこのよう問題に鑑みてなされたものであってその目的とするところは、既存の構成部材を密度フロートの変位検出に利用して構造の簡素化を図ることができる液面計測装置を提供することである。 The present invention has as its object was made in view of the above problem, a liquid level measuring device can be simplified in structure by utilizing existing components in the displacement detection of the density float it is to provide.

このような課題を解決するために発明は、油液の液位に追従する油面検出用フロートと容器の底部に存在する水の深さに対応して移動する水検出フロートとを磁歪線に摺動自在に配設し、前記油面検出用フロートと水検出フロートに設けられたマグネットと前記磁歪線との磁気的な相互作用により生じる信号の到達時間により前記油液の液位と水の深さを計測する磁歪式液面計測装置において、油液中に位置して前記油液の密度に対応して浮沈するとともにマグネットが設けられた密度フロートを前記水検出フロートの上部に前記水検出フロートと弾性部材により連結させて前記磁歪線に摺動自在に配置し、 前記密度フロートと前記水検出フロートとに設けられたマグネットと前記磁歪線との磁気的な相互作用により生じる信号の到達時間 The present invention in order to solve such a problem, the magnetostrictive wire and water detection float which moves in response to the depth of the water present in the bottom of the oil level detecting float a vessel which follows the liquid level in the hydraulic fluid slidably arranged, fluid level and water in the hydraulic fluid by a signal arrival time caused by magnetic interaction between the magnet and the magnetostrictive line provided on the oil level detecting float and water detection float the water in the magnetostrictive liquid level measuring device for measuring the depth of, located in the oil liquid in correspondence with the density of the oil liquid density float magnet is provided as well as sink-float on top of the water detection float detection float and ligated by an elastic member slidably disposed in said magnetostrictive wire, signal arrival of caused by magnetic interaction between the magnet and the magnetostrictive line provided on said water detecting float and the density float time により検出される前記密度フロートと前記水検出フロートとの距離に基いて前記油液の密度を計測する。 Measuring the density of the hydraulic fluid based on the distance between the water sensing float and the density float to be detected by.

請求項1、2の発明によれば、既存の磁歪線式液面計の構造を利用して簡単な構造の密度度測定機能を有する液面計測装置を提供できる。 According to the invention of claim 1 can provide a liquid level measuring device with a density measurement capabilities of a simple structure using the structure of the existing magnetostrictive wire type level gauge.

本発明の一実施例を示すものである。 It illustrates an embodiment of the present invention. 密度フロートの領域を拡大して示す図である。 Is an enlarged view showing a region of the density float. 本発明の他の実施例を示すものである。 It shows another embodiment of the present invention. 密度フロートの領域を拡大して示す図である。 Is an enlarged view showing a region of the density float.

図1は本発明の一実施例を示すものであって、地下タンク1には地上に設けられたピットとの間にライザパイプ3が接続されていて、本発明が特徴とする液面検出装置4がタンク1に設置されている。 Figure 1, there is shown an embodiment of the present invention, the underground tanks 1 riser pipe 3 is connected between the pits provided on the ground, liquid level detecting apparatus to which the present invention is characterized 4 is installed in the tank 1.

液面検出装置4は、駆動手段を収容したヘッド部2と、磁歪線や検出コイルの収容体を兼ねる管により構成されたステム5と、貯油領域に位置しステム5に摺動可能に挿入された油面検出用フロート6で構成されている。 Liquid level detecting device 4 includes a head portion 2 that houses a driving means, a stem 5, which is constituted by a pipe which also serves as a container of the magnetostrictive wire and the detection coil, slidably inserted into the stem 5 located in the oil storage area It is configured with an oil level detecting float 6. ステム5は、収容している磁歪線の張力や、外力に抗することができる程度の剛性を備えた非磁性体金属、この実施例では不錆鋼のパイプにより構成されている。 Stem 5, and the tension of the magnetostrictive wire houses, non-magnetic metal having a rigidity enough to be against the external force, in this embodiment is constituted by a stainless steel pipe. なお、符号11はデータ処理部を示す。 Reference numeral 11 shows the data processing unit.

本発明が特徴とする密度フロート7は、油面検出用フロート6の下方に位置し、かつ弾性部材8で連結された状態でステム5に摺動自在に配置されている。 Density float 7 according to the invention is characterized in, located below the oil level detection float 6, and is slidably disposed within the stem 5 in a state of being coupled by an elastic member 8. 油面検出用フロート6にはステム内の磁歪線と相互作用によりその位置を検出するための位置検出用のマグネット6aが設けられている。 The oil level detection float 6 magnets 6a for position detection for detecting the position by the magnetostrictive wire and interactions within the scan Temu 5 is provided.

この密度フロート7には、図2に示すように油面検出用フロート6と同様にステム内の磁歪線と相互作用によりその位置を検出するためのマグネット7aが固定されている。 This density float 7, magnet 7a for detecting the position by the magnetostrictive wire and interactions within the stem as well as the oil level detecting float 6 as shown in FIG. 2 is fixed.

この実施例において、密度フロート7は、油液の比重に対応して浮力の作用を受けて、ボーメ計と同様に沈降量が変化するから油面検出用フロートとの間の弾性部材8に相応の張力、または押圧力を作用するから、両フロート6,7間の距離Lが油液の密度または比重に対応して変化する。 In this embodiment, the density float 7, corresponding to the specific gravity of the hydraulic fluid under the action of buoyancy, corresponding to the elastic member 8 between the oil level detection float because precipitation amount like the Baume meter changes since exerts a tension or pushing force, the distance L between both the float 6 is changed in response to the density or specific gravity of the oil liquid.

言うまでもなく、この距離Lは、油面検出用フロート6と密度フロート7のそれぞれのマグネット6a、7aに到達する磁歪信号の時間差として検出することができる。 Needless to say, the distance L can be detected as a time difference between magnetostrictive signals reaching each magnet 6a of the oil level detecting float 6 and density float 7, to 7a.

なお、上述の実施例においては油面検出用フロート6を基準フロートとして利用しているが、図3、図4に示したように水検出用フロート12を基準フロートとして利用することができる。 Although not used as a reference float oil level detecting float 6 in the above embodiment, FIG. 3, it is possible to use water detection float 12 as shown in FIG. 4 as a reference float.
すなわち密度フロート7'は、水検出用フロート12の上部近傍に位置するように弾性部材8'に連結した状態で、ステム5に摺動可能に配置されている。 That density float 7 ', the elastic member 8 so as to be located near the top of the water detection float 12' in a state of being connected to, and is slidably disposed in the stem 5.

水検出フロート12は、周知のように油液に浸漬している状態では沈殿するが、タンク1に水が浸入してタンク1の底部に水が溜まると、浮上し浮上による変位量を油面検出用フロート5と同様にマグネット12aにより検出できるように構成されている。 Water detection float 12 is precipitated in the state in which is immersed in a known hydraulic fluid as, when water enters the tank 1 of water is accumulated in the bottom portion of the tank 1, emerged oil level displacement amount of levitation It is configured to be detected similarly by the magnet 12a and the detection float 5.

水検出用フロート12は、周知のように水に対して浮力を発生し、油液に対しては沈殿する程度の比重に設定されている。 Water detection float 12, the buoyant force generated in water as is known, has been set to the specific gravity of the extent of precipitation for hydraulic fluid.

この実施例において、密度フロート7'は、油液の密度に対応し浮力が作用するから水検出用フロート12との間の弾性体8'に相応の張力、押圧力を印加するから、両フロート間の距離Lが油液の密度に対応して変化する。 In this embodiment, the density float 7 ', the elastic body 8 between from buoyancy corresponding to the density of the hydraulic fluid acting on the water detection float 12' tension corresponding to, from application of a pressing force, both the float the distance L between the changes corresponding to the density of the hydraulic fluid. この距離Lは、水検出用フロート12及び密度フロート7'のそれぞれのマグネット12a、7a'に到達する磁歪信号の時間差として検出することができる。 The distance L can be detected as the time difference 'each magnet 12a, 7a' of magnetostrictive signals reaching the water detection float 12 and density float 7.

また、油液の温度を検出することによりデータを温度補正してより高精度の測定が可能となる。 Further, it is possible to measure the temperature correction to more accurate data by detecting the temperature of the hydraulic fluid. さらには、検出した密度データに基づいて油面検出用フロート6の位置を補正することにより、より高い精度で液位を検出することができる。 Further, by correcting the position of the oil level detecting float 6 based on the detected density data, it can detect the liquid level with high accuracy.

なお、上述の実施例においては位置検出用のマグネットをそれぞれのフロートの上部に配置しているが、相互間の距離測定に干渉が生じない位置であれば同様の作用を奏することは明らかである。 Although arranged a magnet for position detection on the top of each float in the above embodiment, it is clear that to obtain the same effect as long as the position that does not cause interference to the distance measurement between each other .

このようにして測定された密度は、たとえばエタノール混合燃料の場合には、水が不正に混合されているか否かの判定に利用できる。 The density measured as described, for example in the case of ethanol mixed fuel, water can be used to determine whether or not mixed incorrectly. また、燃料の油種ごとに密度が相違するから、異油種のコンタミの有無の監視に利用できる。 Further, since the density is different for each type of oil fuel can be utilized to monitor the presence or absence of different oil types of contamination.

Claims (1)

  1. 油液の液位に追従する油面検出用フロートと容器の底部に存在する水の深さに対応して移動する水検出フロートとを磁歪線に摺動自在に配設し、前記油面検出用フロートと水検出フロートに設けられたマグネットと前記磁歪線との磁気的な相互作用により生じる信号の到達時間により前記油液の液位と水の深さを計測する磁歪式液面計測装置において、 And water detection float which moves in response to the depth of the water present in the bottom of the oil level detecting float a vessel which follows the liquid level in the hydraulic fluid slidably arranged to the magnetostrictive wire, the oil level detecting in magnetic magnetostrictive liquid level measuring device for measuring the liquid level and depth of water in the hydraulic fluid by a signal arrival time caused by the interaction between the magnet provided in use floats and water detection float and the magnetostrictive wire ,
    油液中に位置して前記油液の密度に対応して浮沈するとともにマグネットが設けられた密度フロートを前記水検出フロートの上部に前記水検出フロートと弾性部材により連結させて前記磁歪線に摺動自在に配置し、 前記密度フロートと前記水検出フロートとに設けられたマグネットと前記磁歪線との磁気的な相互作用により生じる信号の到達時間差により検出される前記密度フロートと前記水検出フロートとの距離に基いて前記油液の密度を計測する密度測定機能付液面計測装置。 Located in the oil liquid by a density float magnet is provided is connected by the water detection float and the elastic member on top of the water detection float while floating and sinking in response to the density of the oil solution sliding the magnetostrictive wire moving freely arranged, the density float and the density float that is detected by the difference between the arrival times of the signals generated by the magnetic interaction between the magnet and the magnetostrictive line provided on said water detecting float and the water detection float density measurement function with the liquid level measuring device for measuring the density of the hydraulic fluid based on the distance.
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US8042630B2 (en) 2006-11-13 2011-10-25 Raytheon Company Serpentine robotic crawler
US8185241B2 (en) 2006-11-13 2012-05-22 Raytheon Company Tracked robotic crawler having a moveable arm
US8205695B2 (en) 2006-11-13 2012-06-26 Raytheon Company Conformable track assembly for a robotic crawler
US8317555B2 (en) 2009-06-11 2012-11-27 Raytheon Company Amphibious robotic crawler
US8392036B2 (en) 2009-01-08 2013-03-05 Raytheon Company Point and go navigation system and method
US8393422B1 (en) 2012-05-25 2013-03-12 Raytheon Company Serpentine robotic crawler
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KR101245268B1 (en) * 2012-11-22 2013-03-19 (주) 다인레벨 Liquid level and density measurement apparatus
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JP2724058B2 (en) * 1991-09-13 1998-03-09 日本アクア株式会社 Specific gravity meter and water gauge
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JP5618187B2 (en) * 2010-06-16 2014-11-05 株式会社タツノ Density measurement function with the liquid level measuring device

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US8042630B2 (en) 2006-11-13 2011-10-25 Raytheon Company Serpentine robotic crawler
US8185241B2 (en) 2006-11-13 2012-05-22 Raytheon Company Tracked robotic crawler having a moveable arm
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