JPS60220824A - Instrument for detecting height of liquid surface - Google Patents

Instrument for detecting height of liquid surface

Info

Publication number
JPS60220824A
JPS60220824A JP7002385A JP7002385A JPS60220824A JP S60220824 A JPS60220824 A JP S60220824A JP 7002385 A JP7002385 A JP 7002385A JP 7002385 A JP7002385 A JP 7002385A JP S60220824 A JPS60220824 A JP S60220824A
Authority
JP
Japan
Prior art keywords
float
shielding plate
light
light receiving
liquid level
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
Application number
JP7002385A
Other languages
Japanese (ja)
Inventor
Kunio Hara
原 国雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nifco Inc
Original Assignee
Nifco Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nifco Inc filed Critical Nifco Inc
Priority to JP7002385A priority Critical patent/JPS60220824A/en
Publication of JPS60220824A publication Critical patent/JPS60220824A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

PURPOSE:To elevate an accuracy by maintaining the switching of ON or OFF in order of an optical circuit between a light source and plural received light transmitting path means by a sectorial shielding plate, in accordance with the movement of a float in order in a height direction over the prearranged places. CONSTITUTION:A float supporting part 26 is divided into two branches and one end side of a rotary shaft 27 which penetrates both sides is fixed to a float supporting lever 25 via a float assisting frame 28. As the amount of liquid is increased then a shielding plate 29 starts to rotate to right according to the rise of a float 24 and the clockwise rotation of the rotary shaft 27 and a light receiving cable is released from the interposition of the shielding plate in a space from those connected to an empty indicating part at the left end, and an optical path is closed, and when a tank is filled up in due time and the float is lifted up, the shielding plate 29 is completely released from the space 22 and closes the optical path up to the light receiving cable of the right end corresponding to a fill-up indication F and the total indication parts of an indicator 8 are turned on. Since the detection of the height of a liquid surface can be correctly performed at the desired intervals by such an instrument, the accuracy is elevated.

Description

【発明の詳細な説明】 本発明は光伝送路を液面高さ位置に応じて順に選択的に
開閉し、デジタル検出を図った液面高さ検出装置、した
がってタンク内容積との関係では液量を検出する液量計
として用い得る装置の改良に関する。
Detailed Description of the Invention The present invention is a liquid level detection device that selectively opens and closes an optical transmission line in order according to the liquid level height position and performs digital detection. This invention relates to an improvement of a device that can be used as a liquid meter to detect the amount of liquid.

従来の液面高さ検出装置は、液面にフロートを浮かべ、
液面高さ変位に追従してのこのフロートの機械的な位置
変位を可変抵抗器の抵抗値変化分に相当する電気量の変
化に変換して当該液面高さを検出するものが最も一般的
であった。
Conventional liquid level detection devices use a float floating on the liquid surface.
The most common type is one that detects the liquid level by converting the mechanical positional displacement of the float that follows the liquid level height into a change in the amount of electricity corresponding to the change in resistance value of a variable resistor. It was a target.

しかるに、こうした言わば電気的アナログ検出方式のも
のは、フロートの位置変位と電気量変化分とをリニアに
採りにくい上に、多くの場合、可変抵抗器の巻線の製作
公差等から誤差が出やすく、また固定子巻線上を摺動子
接点がこすりながら移行するという機械的構造をどうし
ても含めため、巻線ないし摺動子接点の疲労、摩耗の問
題から本質的に逃れ得ないという欠点がある。
However, with such so-called electrical analog detection systems, it is difficult to measure the positional displacement of the float and the change in the amount of electricity in a linear manner, and in many cases, errors are likely to occur due to manufacturing tolerances of the variable resistor winding. Moreover, since it inevitably includes a mechanical structure in which the slider contacts move while rubbing on the stator windings, there is a drawback that problems of fatigue and wear of the windings or slider contacts cannot be avoided.

さらに、例えば各種車両の燃料タンク等、容器内の燃料
残量を計測、表示する液量計として、こうしたフロート
型アナログ式液面高さ検出装置を用いると、燃料液体に
車両走行中の振動成分が伝わり、液面が揺動することi
こよってフロートも揺動し、これが忠実に可変抵抗器の
抵抗値変化分として現れてしまい、安定な検出出力の維
持がむずかしくなる欠点もある。そのため、従来は、可
変抵抗器の抵抗値変化に伴う電流変化を検知して燃料残
量を表示する部分に感度の鈍いバイメタルを使用するな
どし、実効的に応答感度を低めていたが、これは測定系
として考えた場合、原理的には決して望ましいことでは
ない。
Furthermore, when such a float-type analog liquid level detection device is used as a liquid level meter to measure and display the remaining amount of fuel in a container such as a fuel tank of various vehicles, it is possible to detect vibration components in the fuel liquid while the vehicle is running. is transmitted and the liquid level fluctuates i
As a result, the float also oscillates, which faithfully appears as a change in the resistance value of the variable resistor, making it difficult to maintain a stable detection output. For this reason, in the past, a bimetal with low sensitivity was used in the part that detected the current change due to the change in resistance value of the variable resistor and displayed the remaining fuel level, effectively lowering the response sensitivity. When considered as a measurement system, this is by no means desirable in principle.

本発明はこうした点にかんがみて成されたもので、液面
に追従する部分の機構としては十分に完成されているフ
ロート型を用いながらも、液面高さ検出を所望の間隔で
正確になし得ると共に、可変抵抗器を排斥でき、したが
って構造の簡単化から信頼性を高め得、一方、液面揺動
にも強いデジタル方式の液面高さ検出装置を提供せんと
するものである。
The present invention was developed in view of these points, and uses a fully developed float type mechanism for the part that follows the liquid level, while still accurately detecting the liquid level at desired intervals. In addition, it is an object of the present invention to provide a digital liquid level height detecting device which can eliminate the need for a variable resistor, thereby increasing reliability due to a simplified structure, and which is also resistant to liquid level fluctuations.

そしてまた1本発明においては、上記の主目的を達成す
るべく、当該液面の検出情報を担う媒体には光を選び、
複数の光伝送路中を伝送させ、各光伝送路を液面の高さ
位置変位に従うフロート変位に応じ、順に選択的に開放
していくか閉じていくことをその発想の原点としている
In addition, in the present invention, in order to achieve the above main purpose, light is selected as the medium that carries the detection information of the liquid level,
The origin of the idea is to transmit light through multiple optical transmission lines, and to selectively open or close each optical transmission line in turn according to the displacement of the float in accordance with the height positional displacement of the liquid surface.

第1図および第2図には本発明の望ましい第一の実施例
が示されている。
A first preferred embodiment of the invention is shown in FIGS. 1 and 2. FIG.

この実施例の液面高さ検出装置20では、光伝送路とし
て、既存の光ファイバ乃至これを複数本束ねた光ファイ
バ・ケーブルを使用するが、液面の高さを複数段階に分
けて検出、表示するため、当該段階数に対応の採れた数
の複数本の送光、受光ケーブル6.7が用いられている
0図示の場合は七段階に分けての表示を考えているため
、各七本となっている。
The liquid level height detection device 20 of this embodiment uses an existing optical fiber or an optical fiber cable made by bundling a plurality of optical fibers as an optical transmission path, and detects the liquid level height in multiple stages. , In the case shown in the figure, where multiple light transmitting and receiving cables 6.7 are used in a number corresponding to the number of stages, each stage is divided into seven stages. There are seven.

各ケーブルは上記のように細い光ファイバを複数本束ね
て構成されたものであり、さらにこれら送光、受光側で
各七本のケーブルを束ねて送光親ケーブル6′、受光親
ケーブル7′が構成されている。
Each cable is constructed by bundling multiple thin optical fibers as described above, and furthermore, these seven cables are bundled on the light transmitting and light receiving sides to form a light transmitting main cable 6' and a light receiving main cable 7'. is configured.

送光親ケーブル6′の入力端面は光源Qに臨んでおり、
出力端部側は検出装置20にまで至っている。
The input end face of the light transmission main cable 6' faces the light source Q,
The output end side reaches the detection device 20.

同様に受光親ケーブル7′も、表示器8から検出装置2
0にまで伸びている。
Similarly, the light receiving main cable 7' is connected from the display 8 to the detection device 2.
It has grown to 0.

検出装置20には車両の燃料タンク等天板への取付は用
支持枠3があって、これに光ファイバ・ケーブル端部固
定部21が設けられている。この実施例の場合、この固
定部21は、送光ケーブル用、受光用ケーブル用にそれ
ぞれあって、送光ケーブル出力端部固定部21aと受光
ケーブル入力端部固定部21bとは向かい合わせに平行
に配され、その間に空隙22を形成している。
The detection device 20 has a support frame 3 for attachment to the top plate of a fuel tank or the like of a vehicle, and an optical fiber cable end fixing portion 21 is provided on this support frame 3. In the case of this embodiment, the fixing parts 21 are provided for the light transmitting cable and the light receiving cable, respectively, and the light transmitting cable output end fixing part 21a and the light receiving cable input end fixing part 21b are arranged facing each other in parallel. A gap 22 is formed therebetween.

受光ケーブル7は、親ケーブル端結束部23にてほぐさ
れ、表示器8のいづれか一方の表示部(例えば満タン位
置を示すF表示部)から他方の表示部(したがって空タ
ン位置を示すE表示部)に向かって配された順番にそく
し、受光ケーブル入力端部固定部21bに間隔を置いて
配され、その入力端面を空隙22に臨ませている。
The light-receiving cable 7 is untied at the main cable end binding part 23, and the display part 8 is switched from one display part (for example, the F display part indicating the full tank position) to the other display part (therefore, the E display indicating the empty tank position). They are arranged at intervals in the order in which they are arranged toward the light-receiving cable input end fixing part 21b, and their input end faces face the gap 22.

空隙22を挟んで各受光ケーブルの入力端面に光軸を整
合する位置には、送光ケーブル6(同じく親ケーブル結
束部23にてほぐされて伸びてきている)が一本あて、
出力端面を臨ませなから送光ケーブル出力端部固定部2
1aに埋設、固定されている。
A single light transmitting cable 6 (also untied and extended by the parent cable binding part 23) is placed at a position where the optical axis is aligned with the input end face of each light receiving cable across the gap 22, and
Fixing part 2 of the light transmission cable output end without facing the output end surface.
It is buried and fixed in 1a.

送光ケーブル出力端部固定部21aや受光ケーブル入力
端部固定部21bへの各対応ケーブル端部の固定は、当
該各固定部21a、21bの合成樹脂射出成形時に各端
部を一体埋設成形することによりなすと良い。なお、2
8aはケーブル露出部の保護枠である。
To fix each corresponding cable end to the light transmitting cable output end fixing part 21a and the light receiving cable input end fixing part 21b, each end is integrally embedded during the synthetic resin injection molding of the respective fixing parts 21a and 21b. It is better to do so. In addition, 2
8a is a protective frame for the exposed cable portion.

以上のような構成下にあっては、空隙22の中に何の遮
蔽物もなければ、光源Qからの光は各送光ケーブル6 
、、、、から対応する全ての受光ケーブル7 、、、、
へ伝えられ、受光ケーブル出射端面として形成しである
表示器8の全表示部には光が認められ、点灯しているか
のように見える。すなわち、表示器8は、この実施例の
場合、最も簡単な構成を採っており、各受光ケーブルの
出力端面を表示板を貫通する穴内に臨ませただけのもの
となっている。
Under the above configuration, if there is no shield in the air gap 22, the light from the light source Q will be transmitted to each light transmission cable 6.
All compatible light receiving cables 7 from , , , , , , ,
The light is transmitted to the entire display section of the display 8, which is formed as the output end face of the light receiving cable, and the light appears as if it were lit. That is, the display device 8 in this embodiment has the simplest configuration, with the output end face of each light-receiving cable facing into the hole penetrating the display board.

この実施例の考え方は、上記のように表示器8において
の全表示部点灯時を満タン乃至空のいづれか一方に対応
させ、従来のアナログ式検出装置において用いられてい
たフロート機構を利用して、液面高さ変位に追従する当
該フロートの弧状動変位により、空隙内を動く遮蔽手段
により、対応する一対のケーブル対間を順番に遮ってい
くようにする点にある。このための機構は、次のように
なっている。
The idea of this embodiment is to make the lighting of all the display parts on the display 8 correspond to either full or empty, as described above, and to utilize the float mechanism used in conventional analog detection devices. The present invention is characterized in that the arcuate displacement of the float that follows the displacement of the liquid level causes the shielding means that moves within the gap to sequentially shield the spaces between the corresponding pair of cables. The mechanism for this is as follows.

従来のアナログ式検出器と同様に、液面に浮上するフロ
ート24が設けられ、これはフロート支持部25により
支持されている。鎖部の他端は検出装置20の支持枠3
及びこの場合光ケーブル固定部21にも結合したフロー
ト支持部2θに枢着されている。
Similar to the conventional analog type detector, a float 24 floating on the liquid surface is provided, and this is supported by a float support 25. The other end of the chain is the support frame 3 of the detection device 20
In this case, it is pivotally connected to a float support portion 2θ which is also coupled to the optical cable fixing portion 21.

フロート支持部28は二叉になっていて、この両側を貫
く回転軸27の一端側がフロート支持部25にフロート
かいぞえ枠28を介して固定され、上記の枢着部を構成
してフロート24の回転動を伴う上下動、すなわち弧状
動を保証している。したがって、逆に言うと、フロート
の弧状動に伴って回転軸27が回転する。
The float support part 28 is bifurcated, and one end side of a rotating shaft 27 passing through both sides thereof is fixed to the float support part 25 via a float positioning frame 28, forming the above-mentioned pivot joint and connecting the float 24. Vertical movement accompanied by rotational movement, that is, arcuate movement is guaranteed. Therefore, in other words, the rotating shaft 27 rotates as the float moves in an arc.

この回転軸27には適度な角度範囲に亘り半径方向に面
積を持った扇状の遮蔽板28が固定され(フロート支持
部26が二叉になっているのはこれを収容する意味があ
る)、その面積部分が送光、受光ケーブル対の端面相互
が相臨む空隙22内に入り得るようになっている。
A fan-shaped shielding plate 28 having an area in the radial direction over an appropriate angular range is fixed to this rotating shaft 27 (the reason why the float support part 26 is bifurcated is to accommodate this), This area can enter a gap 22 where the end faces of the pair of light transmitting and receiving cables face each other.

今、実線で示す液体空位置時のフロート位置に対応する
時に表示器8の全表示部を消灯させ、液量が増えるたび
に満タン側に向かって一つづつ点けていき、仮想線で示
す位W(満タン位置)に対応する時に全灯点灯させるよ
うに図った場合を考えると、まず、フロート24が最下
方、空位置にある時に、扇状遮蔽板28が空隙22中を
占領して全受光ケーブルへの送光を断つように、該遮蔽
板29の回転軸27に対する固定角度位置を決定する。
Now, when corresponding to the float position when the liquid is empty, which is shown by the solid line, all the display parts of the display 8 are turned off, and each time the liquid level increases, they are turned on one by one toward the full tank, as shown by the imaginary line. Considering the case where all the lights are turned on when corresponding to the position W (full position), first, when the float 24 is at the lowest empty position, the fan-shaped shielding plate 28 occupies the space 22. A fixed angular position of the shielding plate 29 with respect to the rotating shaft 27 is determined so as to cut off light transmission to all light receiving cables.

、 この状態から補給等により、液量が増加していくと
、第2図上において遮蔽板28はフロート24の上昇、
回転軸27の時計回りに伴って右回転を始め、受光ケー
ブルは左端の空表示部に連結したものから空隙中の遮蔽
板介在を解かれ、光路閉成されていき、やがて満タンに
なってフロートが上がり切ったときには、仮想線で示す
ように遮蔽場28は完全に空隙22中から離脱し、満タ
ン表示Fに対応する図中、右端の受光ケーブルまで、光
路閉成を許して、表示器8においては全表示部の点灯と
なる。
From this state, as the liquid volume increases due to replenishment, etc., the shielding plate 28 in FIG.
As the rotating shaft 27 rotates clockwise, it begins to rotate clockwise, and the light receiving cable is disconnected from the shielding plate in the gap from the one connected to the empty display section on the left end, and the optical path is closed, until the cable becomes full. When the float is fully raised, the shielding field 28 is completely removed from the cavity 22 as shown by the imaginary line, allowing the optical path to be closed to the light receiving cable at the right end in the figure corresponding to the full tank display F, and the display is displayed. In the device 8, all display sections are lit.

満タン時から逆に液量が減り始めれば、全点灯状態から
始まって満タン表示部側から一つづつ消灯していくこと
は最早、自明である。
It is obvious that if the liquid level starts to decrease after the tank is full, it will start with all the lights on and turn off one by one starting from the full tank indicator.

どの程度の液量増減により次の受光ケーブルをまで開ま
たは閉にし、かつその状態を以降、維持するかは、受光
ケーブル入力端部固定部21aにおいてどのような間隔
で当該受光ケーブル入力端部群を配置するかによって定
めることができる。もちろん、これに応じて送光ケーブ
ル側の出力端部配置間隔も定まる。その外、フロートの
弧状動と遮蔽板の回転角変位とに基いて設計的に定める
こともできる。
How much liquid volume increases or decreases to open or close the next light receiving cable and maintain that state from then on depends on what intervals the light receiving cable input end group is placed in the light receiving cable input end fixing part 21a. It can be determined by whether the Of course, the output end arrangement interval on the light transmission cable side is also determined accordingly. In addition, it can also be determined by design based on the arcuate movement of the float and the rotational angular displacement of the shielding plate.

満タン時に全灯消灯、空状態時に全灯点灯というように
、先とは二値的な表現を逆にする場合、この実施例では
何等、追加の構成子を要さない。
When reversing the binary expression from the previous example, such as all lights being off when the tank is full and all lights being on when the tank is empty, this embodiment does not require any additional constructor.

単に遮蔽板28の回転軸への固定位置を図示の場合で空
隙22を埋めている位置が満タン位置となるようにすれ
ば良い。
It is sufficient to simply fix the shielding plate 28 to the rotating shaft so that the position filling the gap 22 in the illustrated case is the full position.

フロート支持部26には第2図にのみ示したが、ピン3
0 、30がある。これは、フロート支持部25の満タ
ン時から空までの最大回転角範囲を規定するストッパで
あって、I#には必要ないが、付帯的には、装置組込み
時等、持ち運びをした際にフロート支持部がくるくる回
って邪魔になることを防ぐ効果もある。
Although shown only in FIG. 2, the float support portion 26 includes a pin 3.
There are 0 and 30. This is a stopper that defines the maximum rotation angle range of the float support part 25 from full to empty, and although it is not necessary for I#, it is an additional stopper that can be used when carrying it around, such as when incorporating it into the device. It also has the effect of preventing the float support part from spinning around and getting in the way.

第3図に要部をのみ示される第二の実施例は、送光側光
伝送路を複数の受光側光伝送路に共通の一つの光透過性
部材から構成したものである。
In the second embodiment, only the main part of which is shown in FIG. 3, the transmitting optical transmission line is constructed from one light-transmitting member common to a plurality of receiving optical transmission lines.

すなわち遮蔽板28が選択的に介入してくる空隙22を
一方の側で画する送光側出力端部31aは、光透過性の
ある(要すれば遮光性覆いを端面以外の全面に付しても
良い)一体の1部材31の出力端面であって、立ち上が
った部分31bの上部には単に光源Qを臨ませるだけで
、出力端面31aからは一様に光が放出される。
That is, the light transmitting side output end 31a, which defines on one side the gap 22 into which the shielding plate 28 selectively intervenes, has a light transmitting side (if necessary, a light shielding cover is attached to the entire surface other than the end face). By simply placing the light source Q at the top of the raised portion 31b of the output end face of the integral member 31, light is uniformly emitted from the output end face 31a.

受光側は先の実施例におけると同様に、光ファイバ・ケ
ーブルの並設でも良いが、この場合は受光側部材32を
用いている。これは送光側部材31と同様の材質からで
きていて、その入力端面に送光側部材の出力端面からの
放射を受けるが、その表面が空隙22の長さ方向に沿っ
て物理的にではなく光学的にいくつかの部位に分かたれ
ている。
On the light receiving side, optical fiber cables may be arranged in parallel as in the previous embodiment, but in this case, the light receiving side member 32 is used. This is made of the same material as the light transmitting side member 31, and its input end face receives radiation from the output end face of the light transmitting side member, but its surface does not physically extend along the length direction of the air gap 22. It is optically divided into several parts.

例えば、その出力端(上部)付近で内部に先細り状に光
を収縮する部分32aを複数個形成し、上端面32bに
は収束された点光源出力が現れるようにしている。した
がって、この各収束部分32aを介しての点光源部分3
2bに受光側各ケーブル7を臨ませれば、既述の第一実
施例同様の機能を呈することができる。
For example, a plurality of portions 32a that constrict light in a tapered manner are formed inside near the output end (upper portion), so that a converged point light source output appears on the upper end surface 32b. Therefore, the point light source portion 3 via each converging portion 32a
If each cable 7 on the light receiving side is made to face 2b, the same function as in the first embodiment described above can be provided.

収束部分32aは合成樹脂により物理的に鋭角形状に成
形することにより簡単に得られるが、その外、収束レン
ズ乃至収束レンズと発散レンズの組合せによって光学的
に光を収束することもできる。
The converging portion 32a can be easily obtained by physically molding synthetic resin into an acute-angled shape, but it is also possible to optically converge light using a converging lens or a combination of a converging lens and a diverging lens.

以上の実施例においては、遮蔽板28を駆動する力を従
来の液量計におけるとほとんど変わらないフロートの弧
状回転により得ているが、本出願人においてはこうした
弧状動を伴うものの高さ変位と回転角変位との非直線性
を是正するため、フロートに真の上下動をさせ、これを
真の回転動に変換する機構を開示している。
In the above embodiment, the force for driving the shielding plate 28 is obtained by the arcuate rotation of the float, which is almost the same as in conventional liquid gauges. In order to correct the non-linearity with rotational angular displacement, a mechanism is disclosed that causes the float to make true vertical motion and converts this into true rotational motion.

これは、大概すると、フロートを上下方向にのみ案内す
るガイドやキ一手段があり、フロートの中央にはひねり
の掛けられた板乃至うねった溝を有する桿が貫通し、フ
ロートの方にはこの板に線接触、乃至溝内に点接触する
突起手段等があって、フロートが上下動してもこの突起
手段には回転的には位置変位がないことから、これに係
合する上記板や桿の方が回転するようになっているもの
である。
Generally speaking, there is a guide or key that guides the float only in the vertical direction, and a twisted plate or rod with an undulating groove passes through the center of the float. The plate has a protruding means that makes line contact or point contact in the groove, and even if the float moves up and down, there is no rotational positional displacement of this protruding means. The rod is designed to rotate.

したがって、この回転する桿に扇状遮蔽板28を取り付
ければ、本装置はこうした機構のものにも十分に適用可
能である。ただしその場合、回転する板乃至桿はフロー
トの上下方向に直交する平面内にて回転するから、図示
の場合と異なり、遮蔽板は横に寝たような配置とされる
。当然、送光側光伝送路と受光側光伝送路の対向関係や
空隙22も、図示の場合とは直交関係となる。
Therefore, by attaching the fan-shaped shielding plate 28 to this rotating rod, the present device is fully applicable to such a mechanism. However, in that case, the rotating plate or rod rotates in a plane perpendicular to the vertical direction of the float, so unlike the case shown in the drawings, the shielding plate is arranged as if lying on its side. Naturally, the opposing relationship between the light transmitting side optical transmission line and the light receiving side optical transmission line and the gap 22 are also orthogonal to those in the illustrated case.

上記の基本構成部分に加えて、第1図及び第2図には、
本出願人が別途開示する液面相対的傾斜時の制御装置1
0も示されている。
In addition to the above basic components, Figures 1 and 2 show
Control device 1 for liquid level relative inclination separately disclosed by the applicant
0 is also shown.

簡単に説明すると、回転軸27のフロート支持側とは反
対側には、該回転軸と同軸に延設され、先端が後述の被
制動部としてのディスク状に拡径した部分33があって
、その周囲を制動箱34が囲んでいる。
Briefly, on the opposite side of the rotating shaft 27 from the float support side, there is a portion 33 extending coaxially with the rotating shaft and having an enlarged diameter portion 33 having a disc-shaped tip serving as a braked portion to be described later. A brake box 34 surrounds it.

制動箱34は下端がユニバーサル軸受35にて支持され
、全方向に可倒であると共に、ユニバーサル軸受35を
越えた位置には、重力、乃至車両にあっては急発進、急
停車、急カーブを切った時等に生起する加速度を印加力
として受け、当該印加力方向に指向する手段、この場合
、かなりな重さの球3Bが適度な長さの支持桿37を介
して取り付けられている。
The lower end of the brake box 34 is supported by a universal bearing 35, and it is tiltable in all directions, and the position beyond the universal bearing 35 is protected by gravity, or in the case of a vehicle, when suddenly starting, stopping, or making a sharp turn. A means for receiving the acceleration generated when the load is applied as an applied force and directing it in the direction of the applied force, in this case a ball 3B having a considerable weight, is attached via a support rod 37 of an appropriate length.

液面が水平を保っている時には、制動箱34はその内壁
がディスク33に触れないような姿勢になっており、も
って回転軸27は自由な回転を許され5フロート24も
自由に液面に追従して弧状動できる。
When the liquid level remains horizontal, the brake box 34 is in such a position that its inner wall does not touch the disk 33, and the rotary shaft 27 is allowed to rotate freely, allowing the float 24 to freely reach the liquid level. Can follow and move in an arc.

しかし一方、液面に相対的な傾斜が生ずると、相対的に
球36の位置がずれ、制動箱34がディスク33に対し
て相対的に傾いて、その内壁面のいづれかの部位を押し
付け、これを制動する。
On the other hand, if a relative inclination occurs in the liquid level, the position of the ball 36 will shift relatively, and the brake box 34 will incline relative to the disc 33, pressing against any part of its inner wall surface and causing this brake.

したがって、フロート24は回転軸27が拘束されるこ
とから以降の上下動を封じられ、液面が相対的に傾く前
の水平であった時の位置に据え置かれ、相対的液面傾斜
による見掛けの液面変位に追従することがない。
Therefore, since the rotating shaft 27 is restrained, the float 24 is prevented from moving up and down thereafter, and is left in the horizontal position before the relative inclination of the liquid level. It does not follow the liquid level displacement.

こうした制御装置10も各種改変を受容する可能性があ
り、単純には印加力指向手段を球38から液体の粘性に
よる抵抗力を利用する羽根形状のものに変える等するこ
とが考えられる。
Such a control device 10 may also undergo various modifications, such as simply changing the applied force directing means from the sphere 38 to a vane-shaped one that utilizes the resistance force due to the viscosity of the liquid.

また、既述した表示器8は最t3簡単な構成のものであ
るが、例えば受光伝送路7の出力端に光電変換回路を備
え、電気的に情報を処理してデジタルディスプレイを図
っても良く、そのディスプレイに改めて光表示(一般に
数値を発光ダイオードや液晶等で表示する技術は公知で
ある)をなす等しても良い。
Further, although the display device 8 described above has the simplest configuration, for example, a photoelectric conversion circuit may be provided at the output end of the light receiving transmission line 7, and information may be electrically processed to provide a digital display. Alternatively, a new optical display (techniques for displaying numerical values using light emitting diodes, liquid crystals, etc. are generally known) may be provided on the display.

以上詳記したが、本発明は、液量計として使い慣れ、完
成度の高いフロート機構を援用し、該フロートを液面に
追従させて、このフロートが予定位置に至っていくたび
に、フロートに連結した扇状遮蔽板をしてその予定箇所
に相当する順番までの受光側光伝送路の光源に対する開
閉をなさしめるようにしたため、構造が簡単でありなが
ら信頼性の高い液面高さ検出が行なえ、従来のような可
変抵抗器を用いたアナログ式に比し、故障要因も極めて
低下させることができる。
As described above in detail, the present invention utilizes a highly complete float mechanism that is familiar to use as a liquid meter, causes the float to follow the liquid surface, and connects the float to the float each time the float reaches a predetermined position. Since the fan-shaped shield plate is used to open and close the light receiving side optical transmission line to the light source up to the order corresponding to the planned location, highly reliable liquid level height detection can be performed with a simple structure. Compared to conventional analog systems using variable resistors, the number of failure factors can be significantly reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明液面高さ検出装置の望ましい第一実施例
の縦断面構成図、第2図は同じく側面図、第3図は第二
の実施例の要部拡大説明図、である。 図中、6は送光伝送路、7は受光伝送路、8は表示器、
20は全体としての液面高さ検出装置、22は空隙、2
4はフロート、25はフロート支持桿、2θは扇状遮蔽
板、である。 出 願 人 株式会社 ニ フ コ
Fig. 1 is a vertical cross-sectional configuration diagram of a preferred first embodiment of the liquid level detection device of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is an enlarged explanatory view of the main parts of the second embodiment. . In the figure, 6 is a light transmitting transmission line, 7 is a light receiving transmission line, 8 is a display,
20 is the overall liquid level height detection device, 22 is a gap, 2
4 is a float, 25 is a float support rod, and 2θ is a fan-shaped shielding plate. Applicant Nifco Co., Ltd.

Claims (1)

【特許請求の範囲】 液体の高さ方向で互いに異なる位置に対応する液体存否
検出予定個所の個数に応じ、各予定個所に対応する受光
伝送路手段を該予定個所の高さ方向の順番に従って複数
備え; 該複数の受光伝送路手段の各入力端面を空隙を介して光
源手段に臨ませると共に; 液面に追従するフロートを設け、該フロートの弧状動に
伴う回転軸に対し、半径方向にある角度分、面積を有す
る扇状遮蔽板を固定し;該扇状遮蔽板を上記空隙内にて
動き得るようにして、上記フロートが該予定個所を高さ
方向に順に越えて移行するに伴い、゛核用状遮蔽板をし
て上記光源と複数の受光伝送路手段との間の光回路を該
受光伝送路手段の高さ方向の上記順番に従い順に開乃至
閉に転換、維持lていかせること;を特徴とする液面高
さ検出装置。
[Scope of Claims] According to the number of liquid presence/absence detection locations corresponding to different positions in the height direction of the liquid, a plurality of light reception and transmission path means corresponding to each scheduled location are provided in accordance with the order of the height direction of the scheduled locations. Provision: Each input end face of the plurality of light reception and transmission line means faces the light source means through a gap; and a float that follows the liquid level is provided, and the input end face is arranged in a radial direction with respect to the rotation axis accompanying the arcuate movement of the float. A fan-shaped shielding plate having an area corresponding to the angle is fixed; the fan-shaped shielding plate is made movable within the gap, and as the float moves sequentially over the predetermined location in the height direction, converting and maintaining the optical circuit between the light source and the plurality of light receiving and transmitting line means from open to closed in order according to the above order in the height direction of the light receiving and transmitting line means using a special shielding plate; Characteristic liquid level height detection device.
JP7002385A 1985-04-04 1985-04-04 Instrument for detecting height of liquid surface Pending JPS60220824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7002385A JPS60220824A (en) 1985-04-04 1985-04-04 Instrument for detecting height of liquid surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7002385A JPS60220824A (en) 1985-04-04 1985-04-04 Instrument for detecting height of liquid surface

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP5123277A Division JPS53137171A (en) 1977-05-06 1977-05-06 Detecting apparatus for liquid level

Publications (1)

Publication Number Publication Date
JPS60220824A true JPS60220824A (en) 1985-11-05

Family

ID=13419589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7002385A Pending JPS60220824A (en) 1985-04-04 1985-04-04 Instrument for detecting height of liquid surface

Country Status (1)

Country Link
JP (1) JPS60220824A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335099U (en) * 1989-08-10 1991-04-05
US7192128B1 (en) * 2006-03-28 2007-03-20 Brother Kogyo Kabushiki Kaisha Ink cartridges
US7419233B2 (en) * 2003-09-30 2008-09-02 Brother Kogyo Kabushiki Kaisha Ink-jet recording apparatus and ink cartridge set
WO2018050057A1 (en) * 2016-09-13 2018-03-22 南京南瑞继保电气有限公司 Device for detecting water leakage of valve tower of high-pressure converter valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335099U (en) * 1989-08-10 1991-04-05
US7419233B2 (en) * 2003-09-30 2008-09-02 Brother Kogyo Kabushiki Kaisha Ink-jet recording apparatus and ink cartridge set
US7192128B1 (en) * 2006-03-28 2007-03-20 Brother Kogyo Kabushiki Kaisha Ink cartridges
WO2018050057A1 (en) * 2016-09-13 2018-03-22 南京南瑞继保电气有限公司 Device for detecting water leakage of valve tower of high-pressure converter valve

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