JPH04279804A - Sensor for varying amount - Google Patents
Sensor for varying amountInfo
- Publication number
- JPH04279804A JPH04279804A JP13491A JP13491A JPH04279804A JP H04279804 A JPH04279804 A JP H04279804A JP 13491 A JP13491 A JP 13491A JP 13491 A JP13491 A JP 13491A JP H04279804 A JPH04279804 A JP H04279804A
- Authority
- JP
- Japan
- Prior art keywords
- potentiometer
- resistance
- sensor
- slider
- intermediate tap
- 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
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/16—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance
- G01D5/165—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying resistance by relative movement of a point of contact or actuation and a resistive track
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、請求項１の上位概念に
記載の、ポテンシオメータを有する、変化量検出用セン
サに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a change detection sensor having a potentiometer.
【０００２】0002
【従来の技術】ＤＥ−ＯＳ３６２１９３７号明細書から
、変化量に対するセンサが公知である。このセンサでは
ポテンシオメータの一方の端部端子に基準電圧が供給さ
れ、他方の端部端子はスイッチングトランジスタを介し
てアースに接続される。変化量を表す電気量がポテンシ
オメータの中間タップの摺動子位置により検出され、計
算機に対する入力信号として使用される。電気量はここ
では例えば、いわゆる“電気的アクセルペダル”に対す
るセンサ信号として使用される。BACKGROUND OF THE INVENTION A sensor for variables is known from DE-OS 3621937. In this sensor, a reference voltage is supplied to one end terminal of a potentiometer, and the other end terminal is connected to ground via a switching transistor. An electrical quantity representing the amount of change is detected by the slider position of the middle tap of the potentiometer and is used as an input signal to the computer. The electrical quantity is used here, for example, as a sensor signal for a so-called "electric accelerator pedal".
【０００３】調整可能な量を供給するセンサに対するこ
の公知のポテンシオメータ装置の欠点は、例えば中間タ
ップの摺動子が端部位置にある状態で、しばしば摺動子
とポテンシオメータの抵抗路との間で接触障害が生じる
ことである。接触障害は、摺動子の運動によりそこに堆
積するポテンシオメータの付着物に起因する。この付着
物は摺動子と抵抗路との間の接触抵抗を増大し、それに
より間違ったポテンシオメータ位置が生じてしまう。中
間タップの摺動子の位置は、例えば入力信号として制御
装置に利用される可変量の値に対する尺度であるから、
間違った摺動子位置は、制御装置の構成によっては誤機
能またはそれどころか制御装置の遮断に結び付く。A disadvantage of this known potentiometer arrangement for sensors supplying an adjustable quantity is that, for example, with the slider of the intermediate tap in the end position, the resistance path between the slider and the potentiometer is often This is due to contact failure occurring between the two. Contact failure is due to deposits on the potentiometer that accumulate there due to movement of the slider. This deposit increases the contact resistance between the slider and the resistance path, thereby causing incorrect potentiometer position. Since the position of the slider of the intermediate tap is a measure for the value of the variable quantity used by the control device as an input signal, for example,
Depending on the configuration of the control device, an incorrect slider position can lead to malfunctions or even to a shutdown of the control device.
【０００４】0004
【発明が解決しようとする課題】本発明の課題は、ポテ
ンシオメータの中間タップの摺動子位置を、ポテンシオ
メータの抵抗路と摺動子との間の障害となる接触抵抗に
依存せずに検出することができるように構成することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to control the slider position of the intermediate tap of a potentiometer without depending on the contact resistance that becomes an obstacle between the resistance path of the potentiometer and the slider. The purpose is to configure the device so that it can be detected.
【０００５】[0005]
【課題を解決するための手段】上記課題は本発明の装置
において、ポテンシオメータの中間タップに供給電圧を
印加し、付加回路により電気的値を検出し、この値から
変化量を導出し、障害となる接触抵抗および供給電圧の
量または場合により生じるその変動が計算に入り込まな
いように構成して解決される。有利には、付加回路の抵
抗にて評価すべき電圧を測定および／または評価し、変
化量の検出の基礎とすることができる。評価すべき電圧
は端部端子からそれぞれアースへ導かれる。変化量と（
中間タップの摺動子位置とポテンシオメータの端部端子
との間の）部分抵抗比との間には関数関係、例えば比例
関係があるから、有利には以下の関係式に従い変化量を
計算することができる。[Means for Solving the Problems] The above object is achieved by applying a supply voltage to the center tap of a potentiometer, detecting an electrical value by an additional circuit, deriving the amount of change from this value, and detecting a fault in the device of the present invention. The solution is such that the quantities of the contact resistance and the supply voltage or their possible variations do not enter into the calculations. Advantageously, the voltage to be evaluated can be measured and/or evaluated at the resistance of the additional circuit and serve as the basis for detecting the change. The voltage to be evaluated is led from the end terminals to ground in each case. The amount of change and (
Since there is a functional relationship, e.g. a proportional relationship, between the partial resistance ratio (between the slider position of the intermediate tap and the end terminal of the potentiometer), it is advantageous to calculate the variation according to the following relationship: be able to.
【０００６】
Ｒ２／Ｒ３＝（Ｕ４・Ｒｐ＋Ｕ４・Ｒ−Ｕ１・Ｒ）／（
Ｕ１・Ｒｐ−Ｕ４・Ｒ＋Ｕ１・Ｒ）ここで、全ポテンシ
オメータ抵抗としての抵抗値Ｒｐと、端部端子での付加
回路の抵抗値Ｒは既知である。電圧Ｕ１とＵ４は上に述
べた測定の結果であり、抵抗Ｒ２とＲ３はポテンシオメ
ータの調整された部分抵抗を表す。R2/R3=(U4・Rp+U4・R−U1・R)/(
(U1.Rp-U4.R+U1.R) Here, the resistance value Rp as the total potentiometer resistance and the resistance value R of the additional circuit at the end terminal are known. Voltages U1 and U4 are the results of the measurements described above, and resistors R2 and R3 represent the adjusted partial resistances of the potentiometer.
【０００７】このようにして検出された抵抗比は、所定
の関数関係に相応して、摺動子の位置を表す信号に変換
される。The resistance ratio detected in this way is converted into a signal representing the position of the slider in accordance with a predetermined functional relationship.
【０００８】本発明による装置により有利には、例えば
位置センサないし距離センサとして、内燃機関への空気
調量または燃料調量と関連して使用する際に、安全性と
信頼度が向上する。例えば本発明の装置は、アクセルペ
ダル位置センサ（Ｅ−ガス）、調整モータ位置および／
またはスロットルバルブ位置に対するフィードバックポ
テンシオメータに使用することができ、さらに空気量測
定器に使用することができる。The device according to the invention advantageously increases safety and reliability when used in conjunction with air or fuel metering to an internal combustion engine, for example as a position or distance sensor. For example, the device of the invention includes an accelerator pedal position sensor (E-gas), an adjusting motor position and/or
Alternatively, it can be used as a feedback potentiometer for throttle valve position, and further can be used in an air amount measuring device.
【０００９】[0009]
【実施例】図１にはポテンシオメータＰが示されている
。ポテンシオメータの中間タップは例えば内燃機関のス
ロットルバルブと結合されており、供給電圧Ｕｖが印加
される。供給電圧Ｕｖの端子と中間タップＰＭとの間に
は摺動抵抗ＲＳが示されており、これは中間タップＰＭ
の摺動子とポテンシオメータＰの抵抗路との間の、例え
ば付着物による接触抵抗を表すものである。中間タップ
ＰＭとポテンシオメータの端部端子ＰＥ１およびＰＥ２
との間には部分抵抗があり、Ｒ２，Ｒ３で示されている
。端部端子ＰＥ１から抵抗Ｒがアースに接続され、ここ
に電圧Ｕ１が印加される。端部端子Ｐ２からも同様に抵
抗Ｒがアースに接続され、ここから電圧Ｕ４を取り出す
ことができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a potentiometer P. The intermediate tap of the potentiometer is connected, for example, to a throttle valve of an internal combustion engine and is supplied with a supply voltage Uv. A sliding resistance RS is shown between the terminal of the supply voltage Uv and the center tap PM, which
It represents the contact resistance between the slider and the resistance path of the potentiometer P due to deposits, for example. Intermediate tap PM and potentiometer end terminals PE1 and PE2
There is a partial resistance between them, which is indicated by R2 and R3. A resistor R is connected to ground from the end terminal PE1, and a voltage U1 is applied thereto. A resistor R is similarly connected to ground from the end terminal P2, from which a voltage U4 can be taken out.
【００１０】次の式を用いることにより；Ｒ２／Ｒ３＝
（Ｕ４・Ｒｐ＋Ｕ４・Ｒ−Ｕ１・Ｒ）／（Ｕ１・Ｒｐ−
Ｕ４・Ｒ＋Ｕ１・Ｒ）ここで、ポテンシオメータＰの全
抵抗としてのＲｐと抵抗Ｒの抵抗値は既知であることが
前提となっており、電圧Ｕ１とＵ２は測定可能であるか
ら、中間タップの摺動子位置は比の大きさとして検出す
ることができる。従い、後続処理のための可変量として
制御装置で使用することができる。ポテンシオメータＰ
の中間タップＰＭの摺動子とポテンシオメータＰの抵抗
路との間の障害となる接触抵抗ＲＳはこの計算には現れ
ないから、センサの電気量を形成する際に高い信頼度が
保証され、抵抗路の障害となる付着物、供給電圧Ｕｖの
大きさ並びにその変動に依存しない。By using the following equation; R2/R3=
(U4・Rp+U4・R−U1・R)/(U1・Rp−
U4・R+U1・R) Here, it is assumed that Rp as the total resistance of potentiometer P and the resistance value of resistor R are known, and since voltages U1 and U2 can be measured, The slider position can be detected as the magnitude of the ratio. It can therefore be used in the control device as a variable for subsequent processing. Potentiometer P
Since the interfering contact resistance RS between the slider of the intermediate tap PM and the resistance path of the potentiometer P does not appear in this calculation, a high degree of reliability is guaranteed when forming the electrical quantity of the sensor. It is independent of deposits that obstruct the resistance path, the magnitude of the supply voltage Uv and its fluctuations.
【００１１】２つの電圧Ｕ１とＵ４は、抵抗比の計算お
よび／またはセンサの位置を表す信号への変換のために
、処理ユニットＣへその入力側Ｉ１とＩ２を介して読み
込まれる。上に示した数式および場合により所定の関数
関係、例えば比例関係を使用することにより、抵抗比に
対する相応の信号ないしセンサ位置が、上に述べた例に
従い後続処理するために処理ユニットＣの出力側Ｏに出
力される。処理ユニットＣはセンサ自体に配置するか、
または内燃機関ないし自動車の駆動パラメータを制御す
る制御ユニットに集積化することができる。The two voltages U1 and U4 are read into the processing unit C via its inputs I1 and I2 for calculation of the resistance ratio and/or conversion into a signal representative of the position of the sensor. By using the mathematical formulas indicated above and optionally predetermined functional relationships, e.g. proportional relationships, the corresponding signal or sensor position for the resistance ratio can be determined at the output of the processing unit C for further processing according to the example mentioned above. Output to O. Processing unit C is placed in the sensor itself, or
Alternatively, it can be integrated into a control unit for controlling the drive parameters of an internal combustion engine or a motor vehicle.
【００１２】本発明の有利な構成では、ポテンシオメー
タ（Ｐ）の端部端子（ＰＥ１，ＰＥ２）からそれぞれ抵
抗（Ｒ）が供給電圧（Ｕｖ）のそれぞれ他方の電極に接
続されており、当該抵抗にて電圧（Ｕ１，Ｕ４）が値と
して取り出される。In an advantageous embodiment of the invention, a resistor (R) is connected from the end terminals (PE1, PE2) of the potentiometer (P) to the respective other electrode of the supply voltage (Uv); The voltages (U1, U4) are taken out as values.
【００１３】また、変化量は、ポテンシオメータ（Ｐ）
の部分抵抗値（Ｒ２，Ｒ３）の比に比例し、該比は次の
関係式
Ｒ２／Ｒ３＝（Ｕ４・Ｒｐ＋Ｕ４・Ｒ−Ｕ１・Ｒ）／（
Ｕ１・Ｒｐ−Ｕ４・Ｒ＋Ｕ１・Ｒ）に従い検出され、こ
こでＲ２は中間タップ（ＰＭ）と第１の端部端子（ＰＥ
１）との間のポテンシオメータの部分抵抗値、Ｒ３は中
間タップ（ＰＭ）と第２の端部端子（ＰＥ２）との間の
ポテンシオメータの部分抵抗値、Ｒｐはポテンシオメー
タの全抵抗、Ｕ１，Ｕ４は抵抗（Ｒ，Ｒ）での電圧であ
る。[0013] Also, the amount of change can be measured using a potentiometer (P).
The ratio is proportional to the ratio of the partial resistance values (R2, R3) of R2/R3=(U4・Rp+U4・R−U1・R)/(
U1・Rp−U4・R+U1・R), where R2 is the intermediate tap (PM) and the first end terminal (PE
1), R3 is the partial resistance of the potentiometer between the middle tap (PM) and the second end terminal (PE2), Rp is the total resistance of the potentiometer, U1 , U4 is the voltage across the resistors (R, R).
【００１４】変化量は、自動車技術における電気的構成
群に対する調整量である。Variations are adjustments to electrical components in motor vehicle technology.
【００１５】センサは、空気および／または燃料調量に
関連した位置センサまたは距離センサである。[0015] The sensor is a position or distance sensor associated with air and/or fuel metering.
【００１６】[0016]
【発明の効果】本発明により、ポテンシオメータの中間
タップの摺動子位置を、ポテンシオメータの抵抗路と摺
動子との間の障害となる接触抵抗に依存せずに検出する
ことができる。According to the present invention, the position of the slider of the intermediate tap of a potentiometer can be detected without depending on the contact resistance that becomes an obstacle between the resistance path of the potentiometer and the slider.
【図１】本発明の実施例の回路図である。FIG. 1 is a circuit diagram of an embodiment of the present invention.
Ｐ ポテンシオメータ Ｕｖ 供給電圧 ＰＭ 中間タップ ＲＳ 接触抵抗 P Potentiometer Uv supply voltage PM middle tap RS Contact resistance
Claims (1)
タップの摺動子位置により当該変化量が検出されるポテ
ンシオメータを有しているセンサにおいて、−供給電圧
（Ｕｖ）がポテンシオメータ（Ｐ）の中間タップ（ＰＭ
）に印加され、−中間タップ（ＰＭ）の位置を、付加回
路とポテンシオメータ（Ｐ）の電気的値の評価により検
出するために、ポテンシオメータ（Ｐ）の端部端子（Ｐ
Ｅ１，ＰＥ２）に付加回路が設けられていることを特徴
とする、変化量に対するセンサ。Claim 1: A sensor for the amount of change, the sensor having a potentiometer in which the amount of change is detected by the slider position of the intermediate tap, in which - the supply voltage (Uv) is the same as that of the potentiometer (P) middle tap (PM
) of the potentiometer (P) and - the end terminal (P
A sensor for the amount of change, characterized in that an additional circuit is provided in E1, PE2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4000521.6 | 1990-01-10 | ||
| DE19904000521 DE4000521A1 (en) | 1990-01-10 | 1990-01-10 | Variable parameter source of e.g. for IC engine fuel measurement - contains potentiometer with voltage applied to centre tapping and auxiliary circuit connected to determine tapping position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04279804A true JPH04279804A (en) | 1992-10-05 |
Family
ID=6397824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13491A Pending JPH04279804A (en) | 1990-01-10 | 1991-01-07 | Sensor for varying amount |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH04279804A (en) |
| DE (1) | DE4000521A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008541111A (en) * | 2005-05-18 | 2008-11-20 | エーゲーオー エレクトロ・ゲレーテバウ ゲーエムベーハー | Method for evaluating a potentiometer and circuit arrangement with a potentiometer |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4216467A1 (en) * | 1992-05-19 | 1993-12-02 | Siedle Horst Kg | Potentiometer for converting physical parameter to electrical form - has current fed into slider, ends connected to current-voltage converter and inverter forming normalised output |
| DE19504385C2 (en) * | 1995-02-12 | 1997-07-17 | Horst Dipl Ing Rosbach | Cutting machine with digital cutting thickness display |
| DE19545969C2 (en) * | 1995-12-11 | 1999-05-12 | Mannesmann Sachs Ag | Arrangement for detecting the position of a machine part, in particular a gear shift lever |
| DE19728596C2 (en) * | 1997-07-04 | 2000-02-17 | Bosch Gmbh Robert | Procedure for monitoring a potentiometer |
| DE19822182B4 (en) * | 1998-05-16 | 2009-10-29 | Volkswagen Ag | Device for determining the current thickness of a wearing pad |
| DE102004035945B3 (en) * | 2004-07-23 | 2006-04-06 | Samson Ag | Monitoring circuit for variable resistor with sliding contact has resistor connected between two variable resistors connected in series between reference voltage and earth |
| FI118059B (en) * | 2005-01-28 | 2007-06-15 | Valtion Teknillinen | Position Sensor and Method for Diagnosing Position Sensor |
| DE102015108767A1 (en) * | 2015-06-03 | 2016-12-08 | Borgward Trademark Holdings Gmbh | Device and method for oil level detection, vehicle and tank |
-
1990
- 1990-01-10 DE DE19904000521 patent/DE4000521A1/en not_active Withdrawn
-
1991
- 1991-01-07 JP JP13491A patent/JPH04279804A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008541111A (en) * | 2005-05-18 | 2008-11-20 | エーゲーオー エレクトロ・ゲレーテバウ ゲーエムベーハー | Method for evaluating a potentiometer and circuit arrangement with a potentiometer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4000521A1 (en) | 1991-07-11 |
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