JPS62223627A - Pulse output liquid level instrument - Google Patents
Pulse output liquid level instrumentInfo
- Publication number
- JPS62223627A JPS62223627A JP6807086A JP6807086A JPS62223627A JP S62223627 A JPS62223627 A JP S62223627A JP 6807086 A JP6807086 A JP 6807086A JP 6807086 A JP6807086 A JP 6807086A JP S62223627 A JPS62223627 A JP S62223627A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- liquid level
- conductor film
- magnetic body
- pulse output
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 29
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 11
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 12
- 239000002828 fuel tank Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Landscapes
- Level Indicators Using A Float (AREA)
Abstract
Description
【発明の詳細な説明】
自動車や航空機、その他多くの輸送機に燃料タンクの燃
料残ｍを測定するための燃料計が使用されている。これ
らの燃料計の大多数がタンクの中の燃料液の高さを測定
する液面レベル計である。DETAILED DESCRIPTION OF THE INVENTION Fuel gauges are used in automobiles, aircraft, and many other transport aircraft to measure the amount of fuel remaining in a fuel tank. The majority of these fuel gauges are level gauges that measure the height of the fuel liquid in the tank.
石油等の燃料や有機化合合成液の備蓄タンクの中にもそ
の備蓄量を測定するために多くのレベル計が使用されて
いる０本発明はこれらの現在多数使用されているレベル
計の新しい方式を提供するものである。Many level meters are used in storage tanks for petroleum and other fuels and organic compound synthetic liquids to measure the amount of fuel stored therein.The present invention is a new method for level meters that are currently widely used. It provides:
従来部われて来た技術の１つとして広く利用されている
車載用の燃料計がある。これは、燃料タンクの中に浮子
を浮かばせ、この浮子にｆｉｌ的に連動した接点が巻線
抵抗上を移動し、浮子高さが変化するのに応じて、出力
抵抗値が変わる！Ｉ４造になっている。One of the technologies that have been developed in the past is a widely used vehicle fuel gauge. This involves floating a float in the fuel tank, and a contact connected to the float moves on the winding resistance, and as the float height changes, the output resistance value changes! It is an I4 building.
この燃料計は燃料タンク形状が複雑な形状であるため液
面レベルと液容積と比例しないこと、巻線抵抗のために
分解能が悪いこと、その他の理由により、誤差が数％か
ら数１０％と悪い、ところが最近自動車はエンジンまわ
り、その他でコンピューターで制御されること、または
自動車ユーザーの要求レベルが高まっていることなどの
理由で、より高い精度の燃料計が必要になっている。This fuel gauge has an error of several percent to several tens of percent due to the complicated shape of the fuel tank, which means that the liquid level is not proportional to the liquid volume, the resolution is poor due to winding resistance, and other reasons. Unfortunately, fuel gauges with higher accuracy are now required due to the fact that the engine and other parts of automobiles are controlled by computers, and the demands of automobile users are increasing.
本発明の液面レベル計は簡単な構造で、高い精度で、容
易にパルス出力が得られる液面レベル計の新しい方法を
提供する。The liquid level meter of the present invention has a simple structure, provides high accuracy, and provides a new method of liquid level meter in which pulse output can be easily obtained.
本発明は車載用燃料計として利用されるレベル３１につ
いて以下に詳細に説明するが１本発明は車載用燃料に限
らず、広く一般の液面レベル計として使用出来ることは
あきらかである。The present invention will be described in detail below regarding the level 31 used as an on-vehicle fuel gauge, but it is clear that the present invention can be used not only for on-vehicle fuel but also as a general liquid level gauge.
本発明による’ＳＡ置では出力値をパルスにて出力るこ
とが出来、信号増幅器や出力増幅器などを用することな
く簡単な構造でパルス信号を出力することが出来る。The 'SA device according to the present invention can output an output value in the form of a pulse, and can output a pulse signal with a simple structure without using a signal amplifier or an output amplifier.
第一図に浮子に固定した磁性体と、液面レベルを測るた
めの導体膜上の磁性体接点との間の、磁気吸引力を用い
た液面レベル計について説明する。Figure 1 describes a liquid level meter that uses magnetic attraction between a magnetic material fixed to a float and a magnetic contact on a conductive film for measuring the liquid level.
１のフランジには外部に信号をとり出すコネクター２
が固定してあり、このコネクターからのリード端子３
がフランジとは絶縁されてリード線１２を経てレベル測
定のための導体膜板６ に接続されている。導体膜＃ｉ
：６ の表面には後で説明する細線状の導電膜が形成し
てあり、これと平行して４４１線状の導体膜が両者が絶
縁された状態で形成しである。Connector 2 to take out the signal to the outside is on the flange of 1.
is fixed, and lead terminal 3 from this connector
is insulated from the flange and connected via a lead wire 12 to a conductor membrane plate 6 for level measurement. Conductor film #i
A thin line-shaped conductive film, which will be described later, is formed on the surface of :6, and a line-shaped conductor film 441 is formed parallel to this, with both being insulated.
これら両側線膜を磁性体で出来た回転接点７ が接触し
ながら移動し、導体膜と導体膜とを結線し、回転接点の
位置に応じたパルス出力になる様に構成されている０回
転接点７ は角形管５の外側にあり、ドーナツ形状をし
た浮子８の１部に固定された磁性体（永久磁石）９と磁
気的にむすばれている。 ｔ；Ｃって）＾面ｌＯの位置
に応じて７７子が上下すると回転接点もそれにｆ１５い
移動するから、ｉＮ面の高さに応じた抵抗値を出力する
ことが出来る。A 0-rotation contact is configured so that a rotating contact 7 made of a magnetic material moves while contacting these double-sided wire films, connects the conductor film to the conductor film, and outputs a pulse according to the position of the rotating contact. 7 is located outside the rectangular tube 5 and is magnetically connected to a magnetic body (permanent magnet) 9 fixed to a part of a donut-shaped float 8. When the 77 element moves up and down according to the position of the plane lO, the rotating contact also moves f15, so it is possible to output a resistance value according to the height of the iN plane.
図２は１１〔載用燃利タンクに本センサーを実装した一
例を示すもので２０が本発明による装置、２１は燃料夕
〉′りを示す、第３図は第２図の実装例において、液面
の高さと液の体猜の１３Ｉｆｆ係を示したもので横軸り
は底面からの液面の高さ、縦軸■は液体の容積を示す、
Ｖとｈとは容器２１が複雑な形状をしているため直線関
係にない、従って通常出方信号と液体の容れ１どの間の
直線関係を得るためのＦ＋［を正が必要である。この補
正方法については後述する。FIG. 2 shows an example in which the present sensor is mounted on a fuel tank 11, in which 20 indicates a device according to the present invention and 21 indicates a fuel tank. FIG. 3 shows an example of the implementation of FIG. This shows the relationship between the height of the liquid level and the volume of the liquid.The horizontal axis shows the height of the liquid level from the bottom, and the vertical axis ■ shows the volume of the liquid.
V and h do not have a linear relationship because the container 21 has a complicated shape, so F+[ must be positive to obtain a linear relationship between the output signal and the liquid container 1. This correction method will be described later.
第１図の導電板６ の詳細パターンの一実施例を第４図
に示す、第４図（ａ）で４３の細線状のパターンはニク
ロムその他の抵抗膜で形成されている。An example of the detailed pattern of the conductive plate 6 shown in FIG. 1 is shown in FIG. 4. In FIG. 4(a), the thin line pattern 43 is formed of nichrome or other resistive film.
４２の細線状パターンはクロムその他の導電性膜で形成
されている。又４２の櫛形状のパターンも導電膜で形成
されている。第４図、（ｂ）、（ｃ）に示す様に回転接
点７はこれら３種の膜の上を回転しながら移動し、電膜
４２凸部パターンに回転接点７か接している時には導電
膜４１と櫛形パターンの導電膜４２とと短絡し櫛形パタ
ーン導電８４２の凸部のない部分では導電膜４１と４２
とは開放される。端子４７と４８とを第５図に示す如く
、端子４８を電源に、端子４７を抵抗Ｒ１を経て電源Ｖ
に接続しておくと、回転接点７ の移動に伴って、端子
７ に接続した出力線５７にはパルス性出力信号が得ら
れる。抵抗膜４３上を回転接点７ が移動するに伴い、
端子４６と４７との間の抵抗値が変化する６回転接点７
が上方に移動すれば抵抗値は増加する。第５図に一実施
例を示した如く、抵抗Ｒ１を経て電源■に端子４６を接
続すると端子４６には、電源電圧■を抵抗Ｒ２と抵抗膜
４３で分割１した電圧が信号として収り出せる。The thin line pattern 42 is made of chromium or other conductive film. Further, 42 comb-shaped patterns are also formed of a conductive film. As shown in FIGS. 4, (b) and (c), the rotating contact 7 moves while rotating on these three types of films, and when the rotating contact 7 is in contact with the convex pattern of the electrical film 42, the conductive film 41 and the conductive film 42 of the comb-shaped pattern are short-circuited, and the conductive films 41 and 42 are short-circuited in the part of the comb-shaped conductive pattern 842 where there is no convex part.
is released. As shown in FIG. 5, the terminals 47 and 48 are connected to the power source with the terminal 48 connected to the power source V through the resistor R1.
When connected to the terminal 7, a pulsed output signal is obtained on the output line 57 connected to the terminal 7 as the rotating contact 7 moves. As the rotating contact 7 moves on the resistive film 43,
6-turn contact 7 with variable resistance between terminals 46 and 47
If moves upward, the resistance value increases. As shown in an embodiment in FIG. 5, when the terminal 46 is connected to the power supply ■ through the resistor R1, the voltage obtained by dividing the power supply voltage ■ by 1 by the resistor R2 and the resistive film 43 can be collected as a signal at the terminal 46. .
この信号を５１で示した微分回路を通すことにより、回
転接点７ が」ニガへ移動している時には、端子４６で
の抵抗値が減少するので負極性のパルス信号が得られ、
回転接点７が下方へ移動しているときには正極性のパル
ス信号が得られる。この信号を増幅器５２で増幅し、ス
テータス レジスター５３へ入力することにより、回転
接点７ が上方へ移動しているか、下方へ移動している
かを記憶させることが出来る。櫛形導電膜の端子４８が
ら得られた信号は信号線５７によりカウンター５４へ入
力される。このカウンター５４はステータス−レジスタ
ー５３がら回転接点７が上方に移動しているが、下方に
移動しているかの信号を５８の信号線がら信号を得、５
７のパルス信号を加算すべきが、減算すべきが判断し、
加減算を行なう、この様にしてパルス数を計数すること
により、デジタル信号にて液体の容積を計測することが
出来、これを信号線５６を通じ、出力することが出来る
。By passing this signal through a differentiating circuit shown at 51, when the rotating contact 7 is moving toward the negative side, the resistance value at the terminal 46 decreases, so a negative pulse signal is obtained.
When the rotating contact 7 is moving downward, a positive pulse signal is obtained. By amplifying this signal with the amplifier 52 and inputting it to the status register 53, it is possible to memorize whether the rotating contact 7 is moving upward or downward. The signal obtained from the terminal 48 of the comb-shaped conductive film is input to the counter 54 via a signal line 57. This counter 54 obtains a signal from the status register 53 indicating whether the rotary contact 7 is moving upward or downward from the signal line 58.
Determine whether the pulse signal of 7 should be added or subtracted,
By performing addition and subtraction and counting the number of pulses in this manner, the volume of the liquid can be measured using a digital signal, and this can be outputted through the signal line 56.
第２図に本発明の一実施例の実装例を示し、又第３図に
その特性例を示した如く、車載用の燃料タンク等ではタ
ンク形状が複雑であり液面高さと液の容積とは直線１１
係なく、積算パルスを補正する必要が生じる０本発明の
他の発明として、この補正なしに抵抗膜のパターンを適
宜に設計することにより９：）られるのでこれにつき以
下に記述する。As shown in Fig. 2 and an example of the implementation of an embodiment of the present invention, and Fig. 3 shows an example of its characteristics, in-vehicle fuel tanks, etc., have complicated tank shapes, and the height of the liquid and the volume of the liquid vary. is straight line 11
However, as another invention of the present invention in which it is necessary to correct the integrated pulse, it can be done by appropriately designing the pattern of the resistive film without this correction, and this will be described below.
燃料タンクの底面からの液面の高さをＸ、その高さでの
容器の断面積を５（ｘ）とし、容器に液体が１００
％入っている時の液体の体積をＱ 、そＯＯ
の時の容積計のパルス数をＮ、。。とすると、出力パル
ス数Ｎと液体体積Ｑとが直線関係にあればか成立する。Let the height of the liquid level from the bottom of the fuel tank be X, the cross-sectional area of the container at that height be 5 (x), and the amount of liquid in the container is 100
%, the volume of the liquid is Q, and the number of pulses of the volumetric meter when it is 00 is N. . This holds true if the number of output pulses N and the liquid volume Q have a linear relationship.
一方断面８ｔＳ（Ｘ＞から、 Ｑ＝Ｓ（ｘ）−△Ｘであ
るから、前記の式と共に次式が得られる。On the other hand, from the cross section 8tS(X>), since Q=S(x)-ΔX, the following equation can be obtained together with the above equation.
本式の左辺はｌパルス毎の間隔を表わし、パルス間隔を
容器の断面Ｓ （ｘ）に反比例する様にとれば、パルス
数Ｎと液体の体積Ｑとは直線関係となる。The left side of this equation represents the interval between every l pulses, and if the pulse interval is taken to be inversely proportional to the cross section S (x) of the container, the number of pulses N and the volume Q of the liquid will have a linear relationship.
第４図に示した櫛形導電体４２の凸部の間隔ｐｌ 、
１）２ 、ｐ３ は上記に示した如く、第２図に一実
施例を示した内部の容積の断面績に反比例する様にパタ
ーンを形成しており、ｐｌ、ｐ２はρ３より狭い、この
様にして第３図に示した一例の特性カーブは直線カーブ
を得ることが出来る。The distance pl between the convex portions of the comb-shaped conductor 42 shown in FIG.
1) As shown above, 2 and p3 form a pattern so as to be inversely proportional to the cross-section of the internal volume, an example of which is shown in Fig. 2, and pl and p2 are narrower than ρ3. Then, the characteristic curve of the example shown in FIG. 3 can be obtained as a straight line curve.
以上に説明した様に本発明による装置は、簡単な構造で
パルス信号出力がｌｊ）られること、容器の形状に依存
しないでｌＮ体容積と出力パルス数との間に直線ＩＩ係
のある出力信号が得られることなどにより高い精度の性
能が得られると共に、部品点数が少なく、構造が簡単で
ある等により信頼性が高く、低いコストの装置を提供す
ることが出来、技術、工業上貢献する所が大である。As explained above, the device according to the present invention has a simple structure, can output a pulse signal, and can generate an output signal that has a linear II coefficient between the body volume and the number of output pulses, regardless of the shape of the container. It is possible to provide high-precision performance due to the fact that it is possible to obtain a is large.
尚、本説明は燃料計の一実施例について説明したが本発
明がこれだけに限定されることが無いのは明らかである
。It should be noted that although this description has been made with respect to one embodiment of the fuel gauge, it is clear that the present invention is not limited to this.
第１図は本発明による装置の一実施例を示す図、第２図
は本発明による装置を車載用燃料タンクのセンサーとし
て応用した一実施例を示す図、第３図は従来装置による
特性例を示す図、第４図は本発明による装置の一実施例
で、第１図の一部分の拡大図を示す図、第５図は本発明
による装置の一実施例の回路部を示す図。
ことしン
ｊ ＋ 屈
Ｉ５″図Fig. 1 is a diagram showing an embodiment of the device according to the present invention, Fig. 2 is a diagram showing an embodiment in which the device according to the present invention is applied as a sensor for a vehicle fuel tank, and Fig. 3 is a characteristic example of a conventional device. FIG. 4 is an enlarged view of a portion of FIG. 1, showing an embodiment of the device according to the present invention, and FIG. 5 is a diagram showing a circuit section of an embodiment of the device according to the present invention. Koshin J + Ku I5'' figure
Claims (1)
膜上の磁性体接点との間の、磁気吸引力を用いた液面レ
ベル計において、パルス出力を出す導電膜パターンを形
成したことを特徴とする液面レベル計。Formation of a conductive film pattern that produces pulse output in a liquid level meter that uses magnetic attraction between a magnetic material fixed to a float and a magnetic contact on a conductive film for measuring the liquid level. A liquid level meter featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6807086A JPS62223627A (en) | 1986-03-26 | 1986-03-26 | Pulse output liquid level instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6807086A JPS62223627A (en) | 1986-03-26 | 1986-03-26 | Pulse output liquid level instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62223627A true JPS62223627A (en) | 1987-10-01 |
Family
ID=13363143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6807086A Pending JPS62223627A (en) | 1986-03-26 | 1986-03-26 | Pulse output liquid level instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62223627A (en) |
-
1986
- 1986-03-26 JP JP6807086A patent/JPS62223627A/en active Pending
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