JP3381562B2 - Potentiometer abnormality detector - Google Patents
Potentiometer abnormality detectorInfo
- Publication number
- JP3381562B2 JP3381562B2 JP19536397A JP19536397A JP3381562B2 JP 3381562 B2 JP3381562 B2 JP 3381562B2 JP 19536397 A JP19536397 A JP 19536397A JP 19536397 A JP19536397 A JP 19536397A JP 3381562 B2 JP3381562 B2 JP 3381562B2
- Authority
- JP
- Japan
- Prior art keywords
- potentiometer
- voltage
- abnormality
- detecting means
- detecting
- 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.)
- Expired - Fee Related
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Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポテンショメータ
を用いて作業装置の操作量・操作位置等を検出するポテ
ンショメータ位置検出器の異常検出装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a potentiometer position detector abnormality detecting device for detecting an operation amount, an operation position and the like of a working device using a potentiometer.
【０００２】[0002]
【従来の技術】従来、ポテンショメータを用いた異常検
出装置は、例えば、実開平１−１４８８０６号公報に記
載されたようなものが知られており、図６とともに説明
する。図６では、ポテンショメータ１の両端はそれぞれ
第１及び第２の抵抗３ａ，３ｃを介して正負の電源（＋
Ｖcc，−Ｖcc）に接続され、ポテンショメータ１の可動
端子側と正電源間には第４の抵抗３ｄを挿入した構成と
し、ポテンショメータ１等に断線異常が発生した場合
に、可動端子の電圧が通常の使用時にはなり得ない正電
源電圧まで上昇することを検知して異常と判定するもの
が知られている。なお、２ａ〜２ｃはリード配線、１４
はコネクタ、１５はバッファアンプ、１６はＣＰＵであ
る。2. Description of the Related Art Conventionally, as an abnormality detecting device using a potentiometer, for example, a device described in Japanese Utility Model Laid-Open No. 1-148806 is known and will be described with reference to FIG. In FIG. 6, both ends of the potentiometer 1 are connected to the positive and negative power sources (+ and +) via the first and second resistors 3a and 3c, respectively.
Vcc, -Vcc), and the fourth resistor 3d is inserted between the movable terminal side of the potentiometer 1 and the positive power source, and when the disconnection abnormality occurs in the potentiometer 1 etc., the voltage of the movable terminal is usually It is known to detect an increase in the positive power supply voltage, which cannot be used during the use, and determine that it is abnormal. In addition, 2a to 2c are lead wires, 14
Is a connector, 15 is a buffer amplifier, and 16 is a CPU.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら前記従来
の構成のポテンショメータ異常検出装置では、ポテンシ
ョメータ等の断線異常に対しては検出が可能であるが、
ポテンショメータの端子間の短絡、ポテンショメータか
らのリード配線間の短絡・リード配線の車体シャーシ
（一般に電源グランドと同一電位）との短絡等の異常を
検出することには不十分であるという課題を有してい
た。However, although the potentiometer abnormality detecting device having the above-mentioned conventional configuration can detect the disconnection abnormality of the potentiometer or the like,
There is a problem that it is insufficient to detect abnormalities such as short circuit between terminals of potentiometer, short circuit between lead wires from potentiometer, short circuit between lead wires and body chassis (generally same potential as power supply ground). Was there.
【０００４】本発明は、このような従来の課題を解決
し、ポテンショメータ等の断線異常検出に加え、ポテン
ショメータの端子間の短絡、ポテンショメータからのリ
ード配線間の短絡・リード配線の車体シャーシ（一般に
電源グランドと同一電位）との短絡、ポテンショメータ
からのリード配線間の短絡、コネクタ端子間の短絡等の
異常を検出できるポテンショメータの異常検出装置を提
供する事を目的とするものである。The present invention solves the conventional problems described above, and in addition to detecting a disconnection abnormality of a potentiometer, a short circuit between terminals of the potentiometer, a short circuit between lead wires from the potentiometer, and a body chassis of lead wires (generally a power supply). It is an object of the present invention to provide a potentiometer abnormality detection device capable of detecting an abnormality such as a short circuit to the same potential as the ground), a short circuit between lead wires from the potentiometer, and a short circuit between connector terminals.
【０００５】[0005]
【課題を解決するための手段】この課題を解決するため
に本発明によるポテンショメータ異常検出装置は、外部
操作により移動可能な可動端子を備えたポテンショメー
タを用い、その可動端子の移動量に基づいて負荷を制御
する制御装置において、ポテンショメータの一端が第１
の抵抗を介して正電源に接続され、他端が第２の抵抗を
介し電源グランドに接続され、さらに可動端子と電源グ
ランド間に第３の抵抗を接続する構成であり、前記可動
端子の電圧を検出する第１の電圧検出手段と前記ポテン
ショメータの片端と第２の抵抗との接続点の電圧を検出
する第２の電圧検出手段と、前記第１，第２の電圧検出
手段のそれぞれの電圧が異常範囲であるか異常範囲であ
るかを判定する第１，第２電圧判定手段を有することを
特徴としたものである。In order to solve this problem, a potentiometer abnormality detecting device according to the present invention uses a potentiometer having a movable terminal that can be moved by an external operation, and the load is determined based on the moving amount of the movable terminal. In the control device that controls the first end of the potentiometer,
Is connected to the positive power supply via the resistance of the second end, the other end is connected to the power supply ground via the second resistance, and the third resistance is connected between the movable terminal and the power supply ground. And a second voltage detecting means for detecting a voltage at a connection point between one end of the potentiometer and a second resistor, and a voltage of each of the first and second voltage detecting means. It is characterized by having first and second voltage determining means for determining whether is an abnormal range or an abnormal range.
【０００６】この発明の構成によれば、ポテンショメー
タ等の断線異常検出に加え、ポテンショメータ端子間の
短絡、リード配線の短絡等の異常を検出できるポテンシ
ョメータの異常検出装置が得られる。According to the configuration of the present invention, there is provided a potentiometer abnormality detecting device capable of detecting an abnormality such as a short circuit between potentiometer terminals and a lead wiring in addition to the detection of a disconnection abnormality of a potentiometer or the like.
【０００７】また、前記ポテンショメータの片端と第１
の抵抗の接続点の電圧を検出する第３の電圧検出手段を
設け、第１，第２，第３の電圧検出手段の検出値を補正
式により演算する補正演算手段を設けた構成とした請求
項１に記載のポテンショメータの異常検出装置とするこ
とにより、ポテンショメータの抵抗値が経時変化・温度
環境等により変動した場合であってもポテンショメータ
等の断線異常検出に加え、ポテンショメータ端子間の短
絡、リード配線の短絡等の異常を検出できるポテンショ
メータの異常検出装置が得られる。Also, one end of the potentiometer and the first
Third voltage detecting means for detecting the voltage at the connection point of the resistor and the correction calculating means for calculating the detection values of the first, second and third voltage detecting means by a correction formula are provided. By using the potentiometer abnormality detection device according to Item 1, even when the potentiometer resistance value fluctuates due to aging, temperature environment, etc., in addition to detection of disconnection abnormality of the potentiometer, short circuit between potentiometer terminals, lead There is provided a potentiometer abnormality detecting device capable of detecting an abnormality such as a wiring short circuit.
【０００８】さらに、第１，第２，第３の電圧検出手段
は、アナログ−デジタル変換器で検出し、さらに前記変
換器はワンチップマイクロコンピュータに内蔵されてい
る構成とすることにより装置の小型・軽量化が図れ回路
規模も小さく安価でポテンショメータ等の断線異常検出
に加え、ポテンショメータ端子間の短絡、リード配線の
短絡、コネクタ部での短絡等の異常を検出できるポテン
ショメータの異常検出装置が得られる。Further, the first, second, and third voltage detecting means detect with an analog-to-digital converter, and the converter is built in a one-chip microcomputer.・ It is possible to obtain a potentiometer abnormality detection device that can detect abnormalities such as short circuit between potentiometer terminals, short circuit between lead wires, short circuit at connector part, etc. .
【０００９】[0009]
【発明の実施の形態】本発明の請求項１に記載の発明
は、外部操作により移動可能な可動端子を備えたポテン
ショメータを用い、その可動端子の移動量に基づいて負
荷を制御する制御装置において、ポテンショメータの一
端が第１の抵抗を介して正電源に接続され、他端が第２
の抵抗を介し電源グランドに接続され、さらに可動端子
と電源グランド間に第３の抵抗を接続する構成であり、
前記可動端子の電圧を検出する第１の電圧検出手段と前
記ポテンショメータの片端と第２の抵抗との接続点の電
圧を検出する第２の電圧検出手段と、前記第１，第２の
電圧検出手段のそれぞれの電圧が正常範囲であるか異常
範囲であるかを判定する第１，第２電圧判定手段を有す
ることを特徴とするポテンショメータの異常検出装置で
あり、ポテンショメータ等の断線異常検出に加え、ポテ
ンショメータ端子間の短絡、リード配線の短絡、コネク
タ部での短絡等の短絡異常をも検出できるという作用を
有する。BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a control device which uses a potentiometer having a movable terminal movable by an external operation and which controls a load based on the amount of movement of the movable terminal. , One end of the potentiometer is connected to the positive power supply via the first resistor, and the other end is the second
Is connected to the power supply ground through the resistance of, and further, a third resistance is connected between the movable terminal and the power supply ground,
First voltage detecting means for detecting a voltage of the movable terminal, second voltage detecting means for detecting a voltage at a connection point between one end of the potentiometer and a second resistor, and the first and second voltage detecting means. A potentiometer abnormality detection device having first and second voltage determination means for determining whether each voltage of the means is in a normal range or an abnormal range. It also has an effect of being able to detect a short circuit abnormality such as a short circuit between potentiometer terminals, a short circuit of lead wiring, a short circuit in a connector portion, and the like.
【００１０】本発明の請求項２に記載の発明は、前記ポ
テンショメータの片端と第１の抵抗の接続点の電圧を検
出する第３の電圧検出手段を設け、第１，第２，第３の
電圧検出手段の検出値を補正式により演算する補正演算
手段を設けた構成とした請求項１に記載のポテンショメ
ータの異常検出装置であり、ポテンショメータの抵抗値
が経時変化・温度環境等により変動した場合であっても
ポテンショメータ等の断線異常検出に加え、ポテンショ
メータ端子間の短絡、リード配線の短絡等の異常を検出
できるという作用を有する。According to a second aspect of the present invention, there is provided a third voltage detecting means for detecting a voltage at a connection point between one end of the potentiometer and the first resistor, and the first, second and third voltage detecting means are provided. 2. The potentiometer abnormality detection device according to claim 1, wherein correction value calculation means for calculating the detection value of the voltage detection means is provided. When the resistance value of the potentiometer fluctuates due to changes over time, temperature environment, etc. Even in this case, in addition to the detection of disconnection abnormality of the potentiometer and the like, there is an effect that abnormality such as short circuit between potentiometer terminals and short circuit of lead wiring can be detected.
【００１１】本発明の請求項３に記載の発明は、第１，
第２，第３の電圧検出手段は、アナログ−デジタル変換
器で検出し、さらに前記変換器はワンチップマイクロコ
ンピュータに内蔵されている構成とすることにより装置
の小型・軽量化が図れ回路規模も小さく安価でポテンシ
ョメータ等の断線異常に加え、ポテンショメータ、リー
ド線の短絡異常を検出できるポテンショメータの異常検
出装置を得るという作用を有する。The invention according to claim 3 of the present invention is,
The second and third voltage detecting means detect with an analog-digital converter, and the converter is built in a one-chip microcomputer, so that the device can be made smaller and lighter and the circuit scale can be increased. It is small and inexpensive, and has an effect of obtaining a potentiometer abnormality detecting device capable of detecting a short circuit abnormality of a potentiometer or a lead wire in addition to a disconnection abnormality of a potentiometer or the like.
【００１２】以下、本発明の実施の形態について図１か
ら図５を用いて説明する。
（実施の形態１）図１は本発明の第１の実施の形態にお
けるポテンショメータの異常検出装置の構成を示すブロ
ック図であり、図２（ａ）は同実施の形態におけるポテ
ンショメータの操作量と可動端子電圧である第１検出電
圧Ｖcの関係を示す関係図である。また、図２（ｂ）は
同実施の形態におけるポテンショメータの操作量と第２
検出電圧ＶLの関係を示している。An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a potentiometer abnormality detection device according to a first embodiment of the present invention, and FIG. 2 (a) is a potentiometer operation amount and movable amount according to the same embodiment. It is a relationship diagram which shows the relationship of the 1st detection voltage Vc which is a terminal voltage. Further, FIG. 2B shows the operation amount of the potentiometer and the second operation amount in the same embodiment.
The relationship of the detection voltage VL is shown.
【００１３】図３に、各異常発生時の第１検出電圧Ｖc
および第２検出電圧ＶLに印加される電圧状態を示す。FIG. 3 shows the first detection voltage Vc when each abnormality occurs.
And the voltage state applied to the second detection voltage VL.
【００１４】図１において、１はポテンショメータ、２
ａ，２ｂ，２ｃはポテンショメータと検出回路部を接続
するリード配線、３ａはポテンショメータの片端と電源
間に挿入されるポテンショメータ抵抗値の約１／１０の
値をもつ第１の抵抗、３ｂはポテンショメータの可動端
子と電源グランド間に接続されるポテンショメータ抵抗
値に比べ十分に大きな第３の抵抗、３ｃはポテンショメ
ータのもう一方の端子と電源グランド間に挿入されるポ
テンショメータの約１／１０の抵抗値の第２の抵抗、４
ａ，４ｂはそれぞれ電圧を検出する第１及び第２電圧検
出手段、５ａ，５ｂは第１及び第２電圧検出手段の電圧
範囲を正常又は異常電圧と判定する第１及び第２電圧判
定手段、６は第１電圧検出手段の出力を位置に変換する
位置変換手段、７は電圧判定手段により異常と判定され
た場合に負荷制御を停止する異常制御手段、８は位置変
換手段の位置に応じて油圧弁等の負荷出力値を制御する
負荷制御手段、９は油圧弁等の負荷で構成されている。In FIG. 1, 1 is a potentiometer, 2 is
a, 2b and 2c are lead wires for connecting the potentiometer and the detection circuit section, 3a is a first resistor having a value of about 1/10 of the potentiometer resistance value inserted between one end of the potentiometer and the power supply, and 3b is a potentiometer. The third resistance, 3c, which is sufficiently larger than the resistance value of the potentiometer connected between the movable terminal and the power supply ground, is the first resistance value of about 1/10 of the potentiometer inserted between the other terminal of the potentiometer and the power supply ground. 2 resistance, 4
a and 4b are first and second voltage detecting means for detecting voltages, respectively, and 5a and 5b are first and second voltage determining means for determining the voltage range of the first and second voltage detecting means as normal or abnormal voltage, 6 is a position conversion means for converting the output of the first voltage detection means into a position, 7 is an abnormality control means for stopping the load control when the voltage determination means determines an abnormality, and 8 is a function of the position of the position conversion means. The load control means for controlling the load output value of the hydraulic valve or the like, and 9 is composed of the load of the hydraulic valve or the like.
【００１５】以下に、図１，図２（ａ），図２（ｂ），
図３，図４，図５を用いて同実施の形態における動作を
説明する。Below, FIG. 1, FIG. 2 (a), FIG. 2 (b),
The operation in the embodiment will be described with reference to FIGS. 3, 4, and 5.
【００１６】ポテンショメータを操作するとその操作量
に応じた電圧Ｖcが第１電圧検出手段４ａに入力される
と位置変換手段６により電圧データから位置データに変
換され負荷制御手段８を介し負荷９を操作量に応じた出
力値で駆動する。この時のポテンショメータの操作量と
可動端子すなわち第１検出電圧との関係を図２（ａ）に
示す。図２（ａ）のようにポテンショメータの操作量に
対する第１検出電圧Ｖcの正常範囲は、ポテンショメー
タの可動範囲であるＶLからＶHの間の電圧となる。ま
た、図２（ｂ）にはポテンショメータの操作量に対する
第２検出電圧ＶLの正常範囲を示す。第２検出電圧ＶLの
正常範囲は、ポテンショメータ等のバラツキを考慮し若
干の範囲を設けＶL±ΔＶとなる。これらの正常電圧範
囲を越える場合の電圧の判定を第１電圧判定手段５ａ及
び第２電圧判定手段５ｂにより検出・判定する。When the potentiometer is operated and a voltage Vc corresponding to the manipulated value is input to the first voltage detecting means 4a, the position converting means 6 converts the voltage data into position data, and the load 9 is operated via the load controlling means 8. It drives with the output value according to the quantity. The relationship between the operation amount of the potentiometer and the movable terminal, that is, the first detection voltage at this time is shown in FIG. As shown in FIG. 2A, the normal range of the first detection voltage Vc with respect to the manipulated variable of the potentiometer is a voltage between VL and VH which is the movable range of the potentiometer. Further, FIG. 2B shows the normal range of the second detection voltage VL with respect to the operation amount of the potentiometer. The normal range of the second detection voltage VL is VL ± ΔV by providing a slight range in consideration of the variation of the potentiometer and the like. When the voltage exceeds these normal voltage ranges, the first voltage determination means 5a and the second voltage determination means 5b detect and determine the voltage.
【００１７】ポテンショメータあるいは、ポテンショメ
ータへのリード配線、接続コネクタ等に異常が発生した
場合は、図３に示すような異常電圧が第１，第２検出電
圧として第１，第２電圧検出手段４ａ，４ｂへ入力され
る。図３で、例えば、ポテンショメータの配線２ｂがリ
ード線の噛み込み等により車体シャーシ（一般的に電源
グランドと同一電位）へ接触している場合には、第１検
出電圧Ｖcが電源グランドに接触されることになるた
め、Ｖc＝０Ｖとなる。また、同第２検出電圧ＶLの電圧
もＶL＝０Ｖとなる。この電圧は第１電圧判定手段５ａ
及び第２電圧判定手段５ｂのそれぞれの正常電圧範囲外
のため異常と判定される、すなわちポテンショメータの
異常と判断され、負荷出力の停止等の異常処理をするこ
とができる。図３のその他の異常状態においても第１，
第２電圧検出手段４ａ，４ｂのどちらかの電圧範囲外の
ため同様に異常検出ができることとなる。When an abnormality occurs in the potentiometer, the lead wiring to the potentiometer, the connection connector or the like, the abnormal voltage as shown in FIG. 3 is used as the first and second detection voltages, and the first and second voltage detecting means 4a, 4b is input. In FIG. 3, for example, when the wiring 2b of the potentiometer is in contact with the vehicle body chassis (generally the same potential as the power source ground) due to the biting of the lead wire or the like, the first detection voltage Vc is contacted with the power source ground. Therefore, Vc = 0V. The voltage of the second detection voltage VL is also VL = 0V. This voltage is the first voltage determination means 5a.
Since it is outside the normal voltage range of each of the second voltage determining means 5b, it is determined to be abnormal, that is, the potentiometer is determined to be abnormal, and abnormal processing such as stop of load output can be performed. Also in the other abnormal states of FIG.
An abnormality can be similarly detected because either of the voltage ranges of the second voltage detecting means 4a and 4b is out of range.
【００１８】以上のようにして得られるポテンショメー
タ異常検出装置はポテンショメータ等の断線異常に加
え、ポテンショメータの短絡異常、リードは配線の車体
シャーシへの短絡異常、コネクタでの短絡、断線を検出
できるという有利な効果が得られる。The potentiometer abnormality detection device obtained as described above is advantageous in that, in addition to the disconnection abnormality of the potentiometer, etc., the potentiometer short circuit abnormality, the lead can detect the wiring body chassis short circuit abnormality, the connector short circuit and the disconnection. Can be obtained.
【００１９】なお、本実施の形態で、ポテンショメータ
の非操作時のポテンショメータの出力は特に規定してい
なかったが、ポテンショメータの非操作時のときポテン
ショメータの出力がゼロ抵抗となるようなポテンショメ
ータで構成することとしても同様の効果が得られる。Although the output of the potentiometer when the potentiometer is not operated is not specified in this embodiment, the potentiometer is configured so that the output of the potentiometer becomes zero resistance when the potentiometer is not operated. The same effect can be obtained.
【００２０】また、図１における第１，第２の抵抗３
ａ，３ｃはポテンショメータの全抵抗値の１／１０程度
としてきたが、ポテンショメータの検出精度をさらに得
るには、前記抵抗はポテンショメータの全抵抗値に比べ
小さい方が良く、比較的精度の必要とされない場合に
は、大きい抵抗値としても同様の効果が得られる。Further, the first and second resistors 3 in FIG.
Although a and 3c are set to about 1/10 of the total resistance value of the potentiometer, it is better that the resistance is smaller than the total resistance value of the potentiometer in order to further obtain the detection accuracy of the potentiometer, and relatively high accuracy is not required. In this case, the same effect can be obtained even with a large resistance value.
【００２１】さらに、図１における第３の抵抗値につい
てもポテンショメータの全抵抗値に比べ十分に大きい値
としたが、この抵抗値についても比較的リニアリティの
必要とされない使い方・アプリケーションにおいては、
小さくしても同様の効果が得られる。Further, the third resistance value in FIG. 1 is also set to a value sufficiently larger than the total resistance value of the potentiometer, but in the usage / application in which this resistance value also requires relatively little linearity,
Even if it is made small, the same effect can be obtained.
【００２２】（実施の形態２）図４は本発明の第２の実
施の形態におけるポテンショメータ異常検出装置の構成
を示すブロック図である。図４において、図１と重複す
る符号の説明は省くが、４ｃは第３の電圧検出手段であ
り、１０は第１電圧検出手段４ａと第２電圧検出手段４
ｂ及び前記第３電圧検出手段４ｃの検出値を用い補正式
により演算する補正演算手段である。(Second Embodiment) FIG. 4 is a block diagram showing the configuration of a potentiometer abnormality detecting device according to a second embodiment of the present invention. In FIG. 4, description of the reference numerals that are the same as those in FIG. 1 is omitted, but 4c is the third voltage detecting means, and 10 is the first voltage detecting means 4a and the second voltage detecting means 4.
It is a correction calculation unit that calculates by a correction formula using b and the detection value of the third voltage detection unit 4c.
【００２３】以下に、図４を用いて同実施の形態におけ
る動作を説明する。ポテンショメータを操作するとその
操作量に応じて得られる第１検出電圧Ｖcと第２検出電
圧ＶLおよび第３検出電圧ＶHを補正演算手段１０により
以下の式で補正演算して得られた出力値Ｖdにより位置
変換を行い、その値に応じた負荷制御出力を行う。The operation of the embodiment will be described below with reference to FIG. When the potentiometer is operated, the first detection voltage Vc, the second detection voltage VL, and the third detection voltage VH, which are obtained according to the operation amount, are corrected by the correction calculation means 10 by the following equation, and the output value Vd is obtained. Position conversion is performed and load control output is performed according to the value.
【００２４】例えば、電圧検出手段の最大電圧をＶMAX
とすると、補正演算式は、
Ｖd＝ＶMAX*（Ｖc−ＶL）／（ＶH−ＶL）
を使用する。また、次段の位置変換手段６がデジタル構
成であり使用分解能が８ｂｉｔである場合には、
Ｖd＝２8*（Ｖc−ＶL）／（ＶH−ＶL）
となる。For example, the maximum voltage of the voltage detecting means is VMAX
Then, the correction calculation formula uses Vd = VMAX * (Vc-VL) / (VH-VL). When the position conversion means 6 in the next stage has a digital configuration and the usable resolution is 8 bits, Vd = 2 8 * (Vc-VL) / (VH-VL).
【００２５】前記演算式より得られたＶdは、ポテンシ
ョメータ１の全抵抗値が変動したとしても、その第１電
圧検出手段４ａに入力された電圧は補正演算手段１０に
より補正されることとなる。The voltage Vd obtained from the above arithmetic expression is corrected by the correction arithmetic means 10 even if the total resistance value of the potentiometer 1 changes.
【００２６】この場合のポテンショメータ異常検出装置
は、前記の演算式により補正されたＶdにより位置デー
タに変換され負荷制御される以外は実施の形態１と同様
に動作することになる。また、第２検出電圧ＶLの正常
範囲は、ポテンショメータ等のバラツキ、経時変化、温
度変化等による変動を考慮し前記実施の形態１に比べ若
干の広い範囲の設定が必要となる以外は、前記実施の形
態１と同様にポテンショメータの断線・短絡あるいは、
ポテンショメータへのリード配線の断線・短絡、コネク
タ等に異常が発生しても同様に異常検出できることとな
る。The potentiometer abnormality detecting device in this case operates in the same manner as in the first embodiment except that the position data is converted into the position data by the Vd corrected by the above arithmetic expression and the load is controlled. In addition, the normal range of the second detection voltage VL is set to be slightly wider than that of the first embodiment except that the variation of the potentiometer or the like, a change with time, a change in temperature, etc. are taken into consideration. As in the case of Mode 1, disconnection / short circuit of the potentiometer, or
Even if the lead wire to the potentiometer is broken or short-circuited, or an error occurs in the connector, it is possible to detect the error as well.
【００２７】以上のようにして得られるポテンショメー
タ異常検出装置は、３つの電圧検出手段とそれらのデー
タをもとに補正式により演算する補正演算手段で構成さ
れているので、ポテンショメータの経時変化、温度変化
等による変動を吸収でき、さらにポテンショメータ等の
断線異常に加え、ポテンショメータの短絡異常、リード
線車体シャーシへの短絡異常、コネクタ部での断線・短
絡等の異常を検出できるという有利な効果が得られる。Since the potentiometer abnormality detecting device obtained as described above is composed of the three voltage detecting means and the correction calculating means for calculating the correction equation based on the data of the three voltage detecting means, the change of the potentiometer with time and the temperature change. It has the advantageous effect of being able to absorb fluctuations caused by changes, etc., and also being able to detect abnormalities such as potentiometer disconnection abnormalities, as well as potentiometer short-circuit abnormalities, lead wire chassis chassis short-circuit abnormalities, and connector disconnection / short-circuiting abnormalities. To be
【００２８】（実施の形態３）図５は、本発明の第３の
実施の形態におけるポテンショメータ異常検出装置のブ
ロック図である。図５で１２ａ，１２ｂは、図１の第
１，第２電圧検出手段４ａ，４ｂに相当するアナログ−
デジタル変換器（以下、ＡＤコンバータと略す）であ
り、１３は位置変換、電圧範囲判定、異常制御等ソフト
ウェアブロックであり、１１は前記１２ａ，１２ｂ，１
３を含んだワンチップマイクロコンピュータであり、ポ
テンショメータ異常検出装置の構成をＡＤコンバータ機
能内蔵のワンチップマイクロコンピュータ（以下、ワン
チップマイコンと略す）等に置き換えた構成であり、本
発明の第１の実施の形態と同様の効果が得られるもので
ある。(Third Embodiment) FIG. 5 is a block diagram of a potentiometer abnormality detecting device according to a third embodiment of the present invention. In FIG. 5, 12a and 12b are analogs corresponding to the first and second voltage detecting means 4a and 4b in FIG.
A digital converter (abbreviated as an AD converter hereinafter), 13 is a software block for position conversion, voltage range determination, abnormality control, and the like, and 11 is the above 12a, 12b, 1
3 is a one-chip microcomputer including 3 and a configuration in which the configuration of the potentiometer abnormality detection device is replaced with a one-chip microcomputer having an AD converter function (hereinafter, abbreviated as one-chip microcomputer) and the like. The same effect as that of the embodiment can be obtained.
【００２９】以下に、図５を用いて同実施の形態におけ
る動作を説明する。ポテンショメータを操作するとその
操作量に応じた第１検出電圧Ｖc及び第２検出電圧ＶLを
ワンチップマイコン内蔵のＡＤコンバータにて検出し、
ソフトウェアにて実施の形態１，２と同様の処理を実施
することによりポテンショメータ異常検出ができる。The operation of the embodiment will be described below with reference to FIG. When the potentiometer is operated, the first detection voltage Vc and the second detection voltage VL corresponding to the operation amount are detected by the AD converter with the built-in one-chip microcomputer,
Potentiometer abnormality detection can be performed by performing the same processing as that of the first and second embodiments with software.
【００３０】以上のようにして得られるポテンショメー
タ異常検出装置は装置の小型・軽量化が図れ回路規模も
小さく安価で、ポテンショメータ等の断線異常に加え、
ポテンショメータの短絡異常、リード線車体シャーシへ
の短絡異常等を検出できるという有利な効果が得られ
る。The potentiometer abnormality detecting device obtained as described above can be made small and lightweight, has a small circuit scale and is inexpensive, and in addition to disconnection abnormality of the potentiometer,
An advantageous effect that a short circuit abnormality of the potentiometer, a short circuit abnormality to the lead wire body chassis, and the like can be detected is obtained.
【００３１】[0031]
【発明の効果】以上のように本発明によるポテンショメ
ータ異常検出装置は、ポテンショメータの一端が第１の
抵抗を介して正電源に接続され、他端が第２の抵抗を介
し電源グランドに接続され、さらに可動端子と電源グラ
ンド間に第３の抵抗を接続する構成であり、前記可動端
子の電圧を検出する第１の電圧検出手段と前記ポテンシ
ョメータの片端と第２の抵抗との接続点の電圧を検出す
る第２の電圧検出手段と、前記第１，第２の電圧検出手
段のそれぞれの電圧が正常範囲であるか異常範囲である
かを判定する第１，第２電圧判定手段を有する構成とす
ることにより、ポテンショメータ等の断線異常に加え、
ポテンショメータの短絡異常、リード線車体シャーシへ
の短絡異常、コネクタ部のはずれ・短絡等を検出できる
という有利な効果が得られる。As described above, in the potentiometer abnormality detecting device according to the present invention, one end of the potentiometer is connected to the positive power supply via the first resistor, and the other end is connected to the power supply ground via the second resistor. Further, a third resistance is connected between the movable terminal and the power supply ground, and the voltage at the connection point between the first voltage detecting means for detecting the voltage at the movable terminal and one end of the potentiometer and the second resistance is A configuration having second voltage detecting means for detecting, and first and second voltage determining means for determining whether each voltage of the first and second voltage detecting means is in a normal range or an abnormal range, By doing so, in addition to disconnection abnormality such as potentiometer,
An advantageous effect that a short circuit abnormality of the potentiometer, a short circuit abnormality to the lead wire body chassis, a detachment / short circuit of the connector portion, and the like can be detected is obtained.
【００３２】また前記ポテンショメータの片端と第１の
抵抗の接続点の電圧を検出する第３の電圧検出手段を設
け、第１，第２，第３の電圧検出手段の検出値を補正式
により演算する補正演算手段を設けた構成とし、さらに
第１，第２，第３の電圧検出手段は、アナログ−デジタ
ル変換器で検出し、さらに前記変換器はワンチップマイ
クロコンピュータに内蔵されている構成とすることによ
り装置の小型・軽量化が図れ、小型で回路規模が小さ
く、かつ経済的負担をかけないという有利な効果が得ら
れる。Further, a third voltage detecting means for detecting the voltage at the connection point between the one end of the potentiometer and the first resistor is provided, and the detection values of the first, second and third voltage detecting means are calculated by a correction formula. And a configuration in which the first, second, and third voltage detection means detect with an analog-digital converter, and the converter is built in a one-chip microcomputer. By doing so, it is possible to achieve the advantageous effects that the device can be made smaller and lighter, the device is small, the circuit scale is small, and the economical burden is not imposed.
【図１】本発明の第１の実施の形態におけるポテンショ
メータ異常検出装置の構成を示すブロック図FIG. 1 is a block diagram showing a configuration of a potentiometer abnormality detection device according to a first embodiment of the present invention.
【図２】（ａ）同実施の形態におけるポテンショメータ
操作量と第１検出電圧の相関図
（ｂ）同実施の形態におけるポテンショメータ操作量と
第２検出電圧の相関図FIG. 2A is a correlation diagram between a potentiometer operation amount and a first detection voltage in the same embodiment. FIG. 2B is a correlation diagram between a potentiometer operation amount and a second detection voltage in the embodiment.
【図３】同実施の形態におけるポテンショメータ異常モ
ード発生時の第１，第２検出電圧の電圧状況を示す図FIG. 3 is a diagram showing voltage states of first and second detection voltages when a potentiometer abnormality mode occurs in the same embodiment.
【図４】本発明の第２の実施の形態におけるポテンショ
メータ異常検出装置の構成を示すブロック図FIG. 4 is a block diagram showing a configuration of a potentiometer abnormality detection device according to a second embodiment of the present invention.
【図５】本発明の第３の実施の形態におけるポテンショ
メータ異常検出装置の構成を示すブロック図FIG. 5 is a block diagram showing a configuration of a potentiometer abnormality detection device according to a third embodiment of the present invention.
【図６】従来のポテンショメータ異常検出装置の構成を
示すブロック図FIG. 6 is a block diagram showing a configuration of a conventional potentiometer abnormality detection device.
１ ポテンショメータ
２ａ，２ｂ，２ｃ リード配線
３ａ 第１の抵抗
３ｂ 第３の抵抗
３ｃ 第２の抵抗
４ａ 第１電圧検出手段
４ｂ 第２電圧検出手段
４ｃ 第３電圧検出手段
５ａ 第１電圧判定手段
５ｂ 第２電圧判定手段
６ 位置変換手段
７ 異常制御手段
８ 負荷制御手段
９ 負荷（油圧弁等）
１０ 補正演算手段
１１ ワンチップマイコン
１２ａ，１２ｂ ワンチップマイコン内蔵のＡＤコンバ
ータ
１３ ワンチップマイコン内蔵ソフトウェアブロック
１４ コネクタ1 potentiometer 2a, 2b, 2c lead wiring 3a first resistor 3b third resistor 3c second resistor 4a first voltage detecting means 4b second voltage detecting means 4c third voltage detecting means 5a first voltage determining means 5b first 2 voltage determination means 6 position conversion means 7 abnormality control means 8 load control means 9 load (hydraulic valve etc.) 10 correction calculation means 11 one-chip microcomputers 12a, 12b one-chip microcomputer built-in AD converter 13 one-chip microcomputer built-in software block 14 connector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐田 紀文 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 今田 博 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 武田 嘉樹 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平10−103910（ＪＰ，Ａ) 特開 平３−202784（ＪＰ，Ａ) 特開 平５−99997（ＪＰ，Ａ) 特開 平７−198305（ＪＰ，Ａ) 特開 平８−264306（ＪＰ，Ａ) 特開 平７−198413（ＪＰ，Ａ) 実開 平５−47874（ＪＰ，Ｕ) 実開 平３−115814（ＪＰ，Ｕ) 実開 平１−128178（ＪＰ，Ｕ) 実開 昭63−21810（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01B 7/00 G01D 5/16 G01R 31/02 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kibun Sada 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroshi Imada 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Yoshiki Takeda, 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-10-103910 (JP, A) JP-A-3-202784 (JP, A) JP 5-99997 (JP, A) JP 7-198305 (JP, A) JP 8-264306 (JP, A) JP 7-198413 (JP, A) Actual development 5-47874 (JP, U) Actually open 3-115814 (JP, U) Actually open 1-128178 (JP, U) Actually open 63-21810 (JP, U) (58) Fields investigated (Int.Cl. 7) , DB name) G01B 7/00 G01D 5/16 G01R 31/02
Claims (3)
えたポテンショメータを用い、その可動端子の移動量に
基づいて負荷を制御する制御装置において、ポテンショ
メータの一端が第１の抵抗を介して正電源に接続され、
他端が第２の抵抗を介し電源グランドに接続され、さら
に可動端子と電源グランド間に第３の抵抗を接続する構
成であり、前記可動端子の電圧を検出する第１の電圧検
出手段と前記ポテンショメータの片端と第２の抵抗との
接続点の電圧を検出する第２の電圧検出手段と、前記第
１，第２の電圧検出手段のそれぞれの電圧が正常範囲で
あるか異常範囲であるかを判定する第１，第２電圧判定
手段を有することを特徴とするポテンショメータの異常
検出装置。1. A control device using a potentiometer having a movable terminal movable by an external operation and controlling a load based on the amount of movement of the movable terminal, wherein one end of the potentiometer has a positive power source via a first resistor. Connected to the
The other end is connected to a power supply ground via a second resistance, and a third resistance is further connected between the movable terminal and the power supply ground, and the first voltage detection means for detecting the voltage of the movable terminal and the Whether the voltage of each of the second voltage detecting means for detecting the voltage at the connection point of one end of the potentiometer and the second resistance and the first and second voltage detecting means is in the normal range or the abnormal range An abnormality detecting device for a potentiometer, comprising: first and second voltage determining means for determining.
接続点の電圧を検出する第３の電圧検出手段を設け、第
１，第２，第３の電圧検出手段の検出値を補正式により
演算する補正演算手段を設けた構成とした請求項１に記
載のポテンショメータの異常検出装置。2. A third voltage detecting means for detecting the voltage at the connection point of one end of the potentiometer and the first resistance is provided, and the detection values of the first, second and third voltage detecting means are calculated by a correction formula. The potentiometer abnormality detection device according to claim 1, wherein the correction calculation means is provided.
ナログ−デジタル変換器で検出し、さらに前記アナログ
−デジタル変換器はワンチップマイクロコンピュータに
内蔵されていることを特徴とする請求項１または２に記
載のポテンショメータの異常検出装置。3. The first, second, and third voltage detecting means detect with an analog-digital converter, and the analog-digital converter is built in a one-chip microcomputer. The potentiometer abnormality detection device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19536397A JP3381562B2 (en) | 1997-07-22 | 1997-07-22 | Potentiometer abnormality detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19536397A JP3381562B2 (en) | 1997-07-22 | 1997-07-22 | Potentiometer abnormality detector |
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| Publication Number | Publication Date |
|---|---|
| JPH1137708A JPH1137708A (en) | 1999-02-12 |
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| DE10349462B4 (en) * | 2003-10-23 | 2008-01-24 | Siemens Ag | Circuit arrangement for checking a potentiometer |
| JP2007303925A (en) * | 2006-05-10 | 2007-11-22 | Tokai Rika Co Ltd | Failure detection circuit of noncontact sensor |
| CN108369084B (en) * | 2017-02-22 | 2020-06-23 | 深圳和而泰智能控制股份有限公司 | Potentiometer gear determining method and device |
| JP6836659B2 (en) | 2017-10-23 | 2021-03-03 | アルプスアルパイン株式会社 | Anomaly detection device and abnormality detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447608Y2 (en) * | 1986-07-28 | 1992-11-10 | ||
| JPH01128178U (en) * | 1988-02-25 | 1989-09-01 | ||
| JP2973444B2 (en) * | 1989-12-29 | 1999-11-08 | 日本精工株式会社 | Short circuit detection device for potentiometer type sensor |
| JPH03115814U (en) * | 1990-03-14 | 1991-12-02 | ||
| JP2703843B2 (en) * | 1991-10-09 | 1998-01-26 | 山武ハネウエル株式会社 | Detector of broken position of feedback resistance of mod roll motor |
| JPH0547874U (en) * | 1991-11-25 | 1993-06-25 | 株式会社東海理化電機製作所 | Variable resistor output detector |
| JP3427456B2 (en) * | 1993-12-27 | 2003-07-14 | 株式会社デンソー | Displacement sensor signal processing device |
| JP3428109B2 (en) * | 1993-12-28 | 2003-07-22 | 松下電器産業株式会社 | Position detection device |
| JPH08264306A (en) * | 1995-03-27 | 1996-10-11 | Ing:Kk | Rotary variable resistor |
| JP3672391B2 (en) * | 1996-09-25 | 2005-07-20 | 株式会社トキメック | Displacement detection circuit with potentiometer |
-
1997
- 1997-07-22 JP JP19536397A patent/JP3381562B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1137708A (en) | 1999-02-12 |
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