JPH03202784A - Detecting apparatus of shortcircuiting of potentiometer-type sensor - Google Patents
Detecting apparatus of shortcircuiting of potentiometer-type sensorInfo
- Publication number
- JPH03202784A JPH03202784A JP34301489A JP34301489A JPH03202784A JP H03202784 A JPH03202784 A JP H03202784A JP 34301489 A JP34301489 A JP 34301489A JP 34301489 A JP34301489 A JP 34301489A JP H03202784 A JPH03202784 A JP H03202784A
- Authority
- JP
- Japan
- Prior art keywords
- potentiometer
- voltage
- circuit
- output
- short
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 27
- 238000012544 monitoring process Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 2
Abstract
Description
【発明の詳細な説明】
（産業上の利用分甲Ｔ）
本発明は、ポテンショメータ式センサの短絡検出装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application A) The present invention relates to a short circuit detection device for a potentiometer type sensor.
（従来技術及びその問題点）
従来、車両用電動パワーステアリング川トルクセンサ、
コラム舵角センサ、４ＷＳ操舵位置センサ等として用い
られるポテンショメータ式センサは、所定の抵抗を介し
てポテンショメータの両端に２種類の異なる所定の電圧
を夫々印加し、前記ポテンショメータの抵抗値の変化を
出力電圧値として検出し、該出力電圧値に基づいて被測
定物の状態を検出するように構成されている。(Prior art and its problems) Conventionally, electric power steering torque sensors for vehicles,
A potentiometer type sensor used as a column steering angle sensor, 4WS steering position sensor, etc. applies two different predetermined voltages to both ends of the potentiometer via a predetermined resistor, and calculates the change in the resistance value of the potentiometer as an output voltage. The output voltage value is detected as a value, and the state of the object to be measured is detected based on the output voltage value.
かかるポテンショメータ式センサの線間短絡の発生を検
出する短絡検出装置として、従来例えば第３図に示すよ
うな構成のものが知られている。As a short-circuit detection device for detecting the occurrence of a short-circuit between lines of such a potentiometer type sensor, one having a configuration as shown in FIG. 3, for example, is conventionally known.
即ち、該故障検出装置は、ポテンショメータ３０の両端
に２種類の異なる所定の電圧ＶＴＩＩ、 Ｖ丁りを夫々
印加し、ポテンショメータ３０の抵抗値の変化を出力電
圧値ｖ’ｒｓｒｃの変化として検出する一方、比較回路
３１によってポテンショメータ３０の正電圧側終端電圧
ＶＴＩ＋を監視し、該電圧ＶＴＩ＋（直が所定基４１！
電圧Ｖｒｅｒ値以下になったとき、ポテンショメータ３
０を含むセンサ系（以下、単に「センサ系」と云う）が
線間短絡したと判別して短絡検出信号を出力するように
なっている。That is, the failure detection device applies two different predetermined voltages VTII and V to both ends of the potentiometer 30, and detects a change in the resistance value of the potentiometer 30 as a change in the output voltage value v'rsrc. , the comparison circuit 31 monitors the positive voltage side terminal voltage VTI+ of the potentiometer 30, and the voltage VTI+ (direction is a predetermined base 41!) is monitored.
When the voltage falls below the Vrer value, potentiometer 3
The sensor system including 0 (hereinafter simply referred to as the "sensor system") is configured to determine that there is a short circuit between lines and output a short circuit detection signal.
しかしながら、上記従来技術による短絡検出装置は、単
一の監視電圧ＶＴＩ＋によりセンサ系の線間短絡を検出
しているため、例えば、ポテンショメータの抵抗値のバ
ラツキ、摩耗等による経年変化等により全抵抗値が増加
した場合、更には、短絡Ｊｕ出生時ポテンショメータ抵
抗値によっては、短絡発生時に監視電圧ＶＴＨ値の変化
量（低下量）が小さくなり、監視電圧ＶＴＩ＋が上記所
定基準電圧Ｖ ｒｅｆ値を横切らず（監視電圧ＶＴＩ＋
が所定基Ｖ＄電圧Ｖｒｅ「を下回らず）、短絡検出を行
えないことがあるという問題点があった。However, since the short circuit detection device according to the above-mentioned conventional technology detects a short circuit between lines in the sensor system using a single monitoring voltage VTI+, for example, the total resistance value Further, depending on the resistance value of the potentiometer at the time of short circuit Ju, the amount of change (amount of decrease) in the monitored voltage VTH value becomes small when a short circuit occurs, and the monitored voltage VTI+ does not cross the predetermined reference voltage V ref value. (Monitoring voltage VTI+
However, there is a problem in that short-circuit detection may not be possible because the voltage does not fall below a predetermined base voltage Vre.
（発明の目的）
木ツシ明は、上記問題点を解決するためになされたもの
であり、ポテンショメータ全抵抗値の変化や短絡発生１
１−テのポテンショメータ抵抗値に拘らず、確実に短絡
検出を行うことができるポテンショメータ式センサの短
絡検出装置を提供することを目的とする。(Purpose of the Invention) The Kitsushi Akira was made to solve the above problems, and it has problems such as changes in the total resistance value of the potentiometer and the occurrence of short circuits.
It is an object of the present invention to provide a short circuit detection device for a potentiometer type sensor that can reliably detect a short circuit regardless of the resistance value of the potentiometer.
（課題を解決するための手段）
上記目的を達成するために、本発明は、所定の抵抗を介
してポテンショメータの両端に２種類の異なる所定の電
圧を夫々印加し、前記ポテンショメータの抵抗値の変化
を出力電圧値として検出し、該出力電圧値に基づいて被
ｄＩす定物の状態を検出するポテンショメータ式センサ
の短絡検出装置において、前記ポテンショメータ両端に
おける電圧値と前記出力電圧値との夫々の差を検出し、
該差に基づき、前記ポテンショメータを含むセンサ系の
線間短絡の有無を判別することを特徴とするものである
。(Means for Solving the Problems) In order to achieve the above object, the present invention applies two different predetermined voltages to both ends of a potentiometer via a predetermined resistor, thereby changing the resistance value of the potentiometer. In a short-circuit detection device for a potentiometer type sensor that detects dI as an output voltage value and detects the state of a fixed object to be subjected to dI based on the output voltage value, the difference between the voltage value at both ends of the potentiometer and the output voltage value detect,
The present invention is characterized in that, based on the difference, it is determined whether there is a short circuit between lines in the sensor system including the potentiometer.
（作用）
ポテンショメータ両端の電圧値とポテンショメータ出力
電圧値との夫々の差を短絡検出用監視電圧とするため、
短絡発生時において少なくとも一方の監視電圧の変化が
大きくなる。従って、ポテンショメータ全抵抗値の変化
や短絡発生時におけるポテンショメータ抵抗値に拘らず
、確実に短絡検出を行うことができる。(Function) In order to use the difference between the voltage value across the potentiometer and the potentiometer output voltage value as the monitoring voltage for short circuit detection,
When a short circuit occurs, the change in at least one of the monitoring voltages increases. Therefore, regardless of the change in the total resistance value of the potentiometer or the resistance value of the potentiometer when a short circuit occurs, short circuit detection can be performed reliably.
（実施例） 本発明の実施例を添伺図面を参照して説明する。(Example) Embodiments of the present invention will be described with reference to accompanying drawings.
第１図は、本発明の第１実施例に係るポテンショメータ
式センサの短絡検出装置を示し、本装置はポテンショメ
ータｌ、差動増巾回路２，３、低、電圧選択回路４、及
び比較回路５の組み合わせで構成されている。FIG. 1 shows a short-circuit detection device for a potentiometer type sensor according to a first embodiment of the present invention. It is composed of a combination of.
ポテンショメータｌの一端は、抵抗７を介して正電圧電
源（図示せず）に接続され、他端は抵抗９を介して接地
されている。ポテンショメータ１の可変抵抗器６の摺動
子１１は制御信号出力回路１２の入力側に接続されてい
る。該出力回路１２の出力側は抵抗１４を介して差動増
巾回路２の演算項ｒＩＪ器１３の反転入力端子に接続さ
れているとノ（に抵抗１７を介して差動増巾回路３の演
算増巾器１６の非反転入力端子に接続されている。演算
増’Ｂ１１３の非反転入力端子にはポテンショメータ１
の前記一端が抵抗１５を介して接続され、従って、差動
増巾回路回路２は出力回路１２を介したポテンショメー
タｌの出力電圧値ＶＴＳＩＯとポテンショメータｌの正
電圧印加側終端電圧値ＶＴ１１との差ΔＶＴＩ＋ （＝
ＶＴＩＩ−ＶＴＳＩＧ）を演算増巾する。One end of the potentiometer l is connected to a positive voltage power source (not shown) via a resistor 7, and the other end is grounded via a resistor 9. The slider 11 of the variable resistor 6 of the potentiometer 1 is connected to the input side of the control signal output circuit 12. The output side of the output circuit 12 is connected to the inverting input terminal of the operational term rIJ unit 13 of the differential amplification circuit 2 via a resistor 14. It is connected to the non-inverting input terminal of the operational amplifier 16.The potentiometer 1 is connected to the non-inverting input terminal of the operational amplifier B113.
is connected via the resistor 15, and therefore, the differential amplification circuit circuit 2 outputs the difference between the output voltage value VTSIO of the potentiometer l via the output circuit 12 and the terminal voltage value VT11 on the positive voltage application side of the potentiometer l. ΔVTI+ (=
VTII-VTSIG) is amplified.
一方、差動増巾回路３はその演算増巾器１６の反転入力
端子に抵抗１８を介してポテンショメータｌの前記他端
が接続され、従って、前記ポテンショメータｌの出力電
圧値Ｖｒｓｒｃとポテンショメータ１のＯＶ電圧印加側
終端電圧値ＶＴＬとの差ΔＶＴＬ （＝ＶＴＳＩＧ−Ｖ
ＴＬ）を演算増ｒｌコする。On the other hand, in the differential amplifier circuit 3, the other end of the potentiometer l is connected to the inverting input terminal of the operational amplifier 16 via the resistor 18, and therefore the output voltage value Vrsrc of the potentiometer l and the OV of the potentiometer 1 are Difference ΔVTL from voltage application side terminal voltage value VTL (=VTSIG-V
TL) is calculated and multiplied by rl.
差動増巾回路２，３の各出力側は低電圧選択回路４のダ
イオード１９．２０の各カソード端に接続されている。Each output side of the differential amplifier circuits 2, 3 is connected to each cathode end of a diode 19, 20 of the low voltage selection circuit 4.
ダイオード１９．２０の各アノード端は、抵抗２１を介
して前記正電圧電源に接続されると共に、比較回路５の
演算増巾器２２の非反転入力端子に接続されている。従
って、低電圧選択回路４は、該回路４に入力される差動
増巾回路２，３の２つの出力電圧のうち低い方の出力電
圧を選択し、その入力電圧にダイオード１９゜２０によ
り決まる若干のオフセラ１〜電圧を付加して比較回路５
に出力する。The anode ends of the diodes 19 and 20 are connected to the positive voltage power supply via the resistor 21 and to the non-inverting input terminal of the operational amplifier 22 of the comparator circuit 5. Therefore, the low voltage selection circuit 4 selects the lower output voltage of the two output voltages of the differential amplification circuits 2 and 3 inputted to the circuit 4, and the input voltage is determined by the diode 19 and 20. Comparison circuit 5 by adding some offset voltage 1 to voltage
Output to.
比較回路５の演算増１１１器２２の反転入力端子には基
Ｚ１１：電圧形成用直列回路の抵抗２３．２４の接読点
２５が接続され、上記低電圧選択回路４からの入ツノ電
圧と所定基準電圧Ｖｒｅｆ（接続点２５の電圧）とを比
較し、入力電圧が所定基準電圧Ｖｒｅｆ以下の場合、低
レベルの短絡検出信号を出力する。The inverting input terminal of the arithmetic amplifier 111 22 of the comparator circuit 5 is connected to the base Z11: the contact point 25 of the resistor 23, 24 of the voltage forming series circuit, and the input terminal voltage from the low voltage selection circuit 4 and a predetermined standard are connected. It compares the input voltage with the voltage Vref (voltage at the connection point 25), and outputs a low-level short circuit detection signal if the input voltage is less than the predetermined reference voltage Vref.
次に」二記の構成の作動を説明する。Next, the operation of the configuration described in section 2 will be explained.
ポテンショメータｌが正常である場合には、その出力電
圧ＶＴＳＩＯ値はポテンショメータ１の所定抵抗値可変
範囲に応じた所定範囲内にあり、差動増巾回路２，３の
差動入力電圧ΔＶＴＩ＋ （＝ＶＴＩＩ −ＶｒｓＩｃ
） 、 △Ｖｎ、 （＝ＶＴＳＩＧ−ＶＴＬ） ハ夫々
アル一定値以上であり、従って該回路２，３の出力電圧
も夫々ある一定値以上である。従って、低電圧選択回路
４の出力電圧は比較回路５の所定基Ｚ１ｕ電圧Ｖｒｅ「
以上となり、短絡検出信号は出力されない
一方、例えばポテンショメータ１の前記一端と可変抵抗
器６間の正電圧印加線１０と摺動子の出力線１１との間
で線間短絡が発生した場合、差動増１１回路２の差動入
ツノ電圧△ＶＴＩＩはＯｖとなるため、低電圧選択回路
４の出力電圧は比較回路５の所定基準電圧Ｖｒｅｆ以下
となり、短絡検出信号が出力される。When the potentiometer l is normal, its output voltage VTSIO value is within a predetermined range corresponding to the predetermined resistance value variable range of the potentiometer 1, and the differential input voltage ΔVTI+ (=VTII -VrsIc
), ΔVn, (=VTSIG-VTL) are each greater than a certain value, and therefore the output voltages of the circuits 2 and 3 are also each greater than a certain value. Therefore, the output voltage of the low voltage selection circuit 4 is equal to the predetermined base Z1u voltage Vre of the comparison circuit 5.
As described above, while the short circuit detection signal is not output, for example, if a line short circuit occurs between the positive voltage application line 10 between the one end of the potentiometer 1 and the variable resistor 6 and the output line 11 of the slider, the difference Since the differential input horn voltage ΔVTII of the dynamic amplifier 11 circuit 2 becomes Ov, the output voltage of the low voltage selection circuit 4 becomes equal to or lower than the predetermined reference voltage Vref of the comparator circuit 5, and a short circuit detection signal is output.
同様に、ポテンショメータ１の前記他端と可変抵抗器６
間のＯＶ電圧印加線８と出力線１１との間で線間短絡が
発生した場合は、差動増［１］回路３の差動入力電圧△
ＶＴＬがＯＶとなるため、上述した場合と同様に低電圧
選択回路４の出力電圧は比較回路５の所定基準電圧Ｖｒ
ｅｆ以下となり、短絡検出信号か出力される。Similarly, the other end of the potentiometer 1 and the variable resistor 6
If a line short circuit occurs between the OV voltage application line 8 and the output line 11, the differential input voltage △ of the differential amplifier [1] circuit 3
Since VTL becomes OV, the output voltage of the low voltage selection circuit 4 is equal to the predetermined reference voltage Vr of the comparison circuit 5, as in the case described above.
ef or less, and a short circuit detection signal is output.
また、正電圧印加線ｌＯとＯＶ電圧印加線８との間で線
間短絡が発生した場合は、差動増巾回路回路２．３の双
方の差動入力電圧ΔＶＴＩ＋、ΔＶ丁ＬｆＪ＜ＯＶとな
るため、」二連と同様に短絡検出信けが出力される。In addition, if a line short circuit occurs between the positive voltage application line lO and the OV voltage application line 8, the differential input voltages ΔVTI+ and ΔV−LfJ<OV of both differential amplifier circuits 2.3 and Therefore, a short circuit detection signal is output in the same way as in the case of double connection.
このように、本発明によれば、ポテンショメータ１の短
絡検出を正電圧印加線１０と出力電圧線１１との電位差
ΔＶＴ１１及び出力電圧線１１とｏＶ電圧印加線８との
電位差ΔＶＴＬ、即ち、２つの監視電圧に基づき行うよ
うにしたので、ポテンショメータｌの全抵抗値の変化や
短銘光生時のポテンショメータ抵抗値に拘らず、確実に
短絡検出を行うことができる。例えば一定期間以上使用
され摩耗が進み全抵抗値が増加したポテンショメータに
おいて短絡が発生した場合でも、上記２つの監視電圧の
いずれか一方の電圧変化（低下量）が大きくなり、それ
に応じて短絡検出信号が出力されるため、安全にフェー
ルセーフ動作に移行することができる。As described above, according to the present invention, short-circuit detection of the potentiometer 1 is performed using the potential difference ΔVT11 between the positive voltage application line 10 and the output voltage line 11 and the potential difference ΔVTL between the output voltage line 11 and the oV voltage application line 8, that is, the two Since this is carried out based on the monitoring voltage, short-circuit detection can be reliably performed regardless of changes in the total resistance value of the potentiometer 1 or the resistance value of the potentiometer when short light is generated. For example, even if a short circuit occurs in a potentiometer that has been used for a certain period of time and has worn out and its total resistance value has increased, the voltage change (decrease amount) of one of the two monitoring voltages will increase, and a short circuit detection signal will be generated accordingly. is output, so it is possible to safely shift to failsafe operation.
更に、本発明によれば、短絡発生時と正常時との間で監
視電圧の差が大きいため、短絡検出用基準電圧値Ｖｒｅ
ｒ（抵抗２３．２４間の接続点２５の電圧）を正常時の
監視電圧に対し余裕のある値（十分に低い値）とするこ
とができ、外乱ノイズ等に対して誤作動なく、短絡時に
のみ確実に作動するように設定することができる。Furthermore, according to the present invention, since there is a large difference in the monitored voltage between when a short circuit occurs and when it is normal, the short circuit detection reference voltage value Vre
r (the voltage at the connection point 25 between the resistors 23 and 24) can be set to a value with a margin (sufficiently low value) compared to the monitoring voltage under normal conditions, so there is no malfunction due to disturbance noise, etc., and there is no problem in the event of a short circuit. can only be set to work reliably.
第２図は本発明の第２実施例を示す。この実施例は、上
述した第１実施例に対して、ポテンショメータ１の前記
也端を抵抗９を介して接地するかわりに、負電圧電源（
図示せず）に接続し、これニＩ’ｒ シテ差１−ＩＪＩ
（’？１１１１’７１路２ 、 ３ （Ｆｌ演算増’ｌ
’＋！ｎ ］ ３ 。FIG. 2 shows a second embodiment of the invention. In this embodiment, unlike the first embodiment described above, instead of grounding the terminal of the potentiometer 1 via the resistor 9, a negative voltage power supply (
(not shown) and connect this to the
('?1111'71 path 2, 3 (Fl operation increase 'l
'＋! n ] 3.
１６の各非反転入力端子及び比較回路５の演算増ＩＪ器
２２の反転入力端子に夫々抵抗２６．２７及び２４を介
して同じく負電圧電源に接続し、これらに負電圧を印加
するようにした点か十目違する。16 non-inverting input terminals and the inverting input terminal of the arithmetic intensifier IJ 22 of the comparator circuit 5 are also connected to a negative voltage power supply via resistors 26, 27 and 24, respectively, so that a negative voltage is applied to them. I'm off by a score or ten.
この場合、短絡発生時と正常時との間で監視電圧の差か
より大きくなり、従って、上述した第１実施例に対し短
絡検出用基準電圧値Ｖｒｅ「を正常時の監視電圧に対し
より余裕のある値とすることかでき外乱ノイズ等による
誤作動を確実に防止できる。In this case, the difference in the monitoring voltage between when a short circuit occurs and when it is normal becomes larger, and therefore, compared to the first embodiment described above, the reference voltage value Vre for short circuit detection has more margin than the monitoring voltage when it is normal. can be set to a certain value, and malfunctions due to disturbance noise etc. can be reliably prevented.
（発明の効果）
以上詳述したように、本発明によれば、所定の抵抗を介
してポテンショメータの両端に２種類の異なる所定の電
圧を夫々印加し、前記ポテンショメータの抵抗値の変化
を出力電圧値として検出し、該出力電圧値に基づいて被
４１す定物の状態を検出するポテンショメータ式センサ
の短絡検出装置において、前記ポテンショメータ内端に
おける電圧値と１ｉｉｊ記山力電圧値との夫々の差を検
出し、該差に基づき、［）１」記ポテンショメータを含
むセンサ系の線間短絡の有能を判別するようにしたので
、ポテンショメータ全抵抗値の変化や短絡発生時のポテ
ンショメータ抵抗値に拘らず、確実にポテンショメータ
の短絡検出を行うことができるという優れた効果を奏す
るものである。(Effects of the Invention) As detailed above, according to the present invention, two different predetermined voltages are applied to both ends of the potentiometer via a predetermined resistor, and the change in the resistance value of the potentiometer is calculated as the output voltage. In a short circuit detection device for a potentiometer type sensor that detects the state of a fixed object based on the output voltage value, the difference between the voltage value at the inner end of the potentiometer and the voltage value recorded in 1iij. is detected, and based on the difference, it is determined whether the sensor system including the potentiometer described in ()1 is capable of causing a line-to-line short circuit. First, it has the excellent effect of being able to reliably detect a short circuit in a potentiometer.
第１図は本発明の第１実施例に係るポテンショメータ式
センサの短絡検出装置を示す回路図、第２図は本発明の
第２実施例に係るポテンショメータ式センサの短絡検出
装置を示す回路図、第３図はポテンショメータ式センサ
の従来の短絡検出装置を示す回路図である。
ｌ ポテンショメータ、６・抵抗、８− ＯＶ電圧印加
線、１０・正電圧印加線、１１・出力電圧線、１３．１
６・差動増１［」器、２２・比較器。FIG. 1 is a circuit diagram showing a short-circuit detection device for a potentiometer-type sensor according to a first embodiment of the present invention, and FIG. 2 is a circuit diagram showing a short-circuit detection device for a potentiometer-type sensor according to a second embodiment of the present invention. FIG. 3 is a circuit diagram showing a conventional short circuit detection device for a potentiometer type sensor. l Potentiometer, 6. Resistor, 8- OV voltage application line, 10. Positive voltage application line, 11. Output voltage line, 13.1
6. Differential amplifier 1['' unit, 22. Comparator.
Claims (1)
類の異なる所定の電圧を夫々印加し、前記ポテンショメ
ータの抵抗値の変化を出力電圧値として検出し、該出力
電圧値に基づいて被測定物の状態を検出するポテンショ
メータ式センサの短絡検出装置において、前記ポテンシ
ョメータ両端における電圧値と前記出力電圧値との夫々
の差を検出し、該差に基づき、前記ポテンショメータを
含むセンサ系の線間短絡の有無を判別することを特徴と
するポテンショメータ式センサの短絡検出装置。1. Apply two different predetermined voltages to both ends of the potentiometer via a predetermined resistor, detect a change in the resistance value of the potentiometer as an output voltage value, and measure the value of the object to be measured based on the output voltage value. In a short-circuit detection device for a potentiometer-type sensor that detects a state, the difference between the voltage value at both ends of the potentiometer and the output voltage value is detected, and based on the difference, the presence or absence of a line-to-line short circuit in the sensor system including the potentiometer is detected. A short-circuit detection device for a potentiometer type sensor, which is characterized by determining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343014A JP2973444B2 (en) | 1989-12-29 | 1989-12-29 | Short circuit detection device for potentiometer type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343014A JP2973444B2 (en) | 1989-12-29 | 1989-12-29 | Short circuit detection device for potentiometer type sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03202784A true JPH03202784A (en) | 1991-09-04 |
| JP2973444B2 JP2973444B2 (en) | 1999-11-08 |
Family
ID=18358273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343014A Expired - Fee Related JP2973444B2 (en) | 1989-12-29 | 1989-12-29 | Short circuit detection device for potentiometer type sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2973444B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137708A (en) * | 1997-07-22 | 1999-02-12 | Matsushita Electric Ind Co Ltd | Abnormally detector for potentiometer |
| JP2007303925A (en) * | 2006-05-10 | 2007-11-22 | Tokai Rika Co Ltd | Failure detection circuit of noncontact sensor |
| JP4551517B2 (en) * | 1998-11-30 | 2010-09-29 | アルテラ コーポレイション | Circuit protection method and apparatus in hot socket state |
| CN102175904A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Measurement device for directly measuring voltage difference between two high voltage ends |
| JP2013130513A (en) * | 2011-12-22 | 2013-07-04 | Denso Corp | Position detector |
| WO2019082514A1 (en) * | 2017-10-23 | 2019-05-02 | アルプスアルパイン株式会社 | Abnormality detection device and abnormality detection method |
-
1989
- 1989-12-29 JP JP1343014A patent/JP2973444B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137708A (en) * | 1997-07-22 | 1999-02-12 | Matsushita Electric Ind Co Ltd | Abnormally detector for potentiometer |
| JP4551517B2 (en) * | 1998-11-30 | 2010-09-29 | アルテラ コーポレイション | Circuit protection method and apparatus in hot socket state |
| JP2007303925A (en) * | 2006-05-10 | 2007-11-22 | Tokai Rika Co Ltd | Failure detection circuit of noncontact sensor |
| CN102175904A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Measurement device for directly measuring voltage difference between two high voltage ends |
| JP2013130513A (en) * | 2011-12-22 | 2013-07-04 | Denso Corp | Position detector |
| US8941399B2 (en) | 2011-12-22 | 2015-01-27 | Denso Corporation | Position detecting device |
| WO2019082514A1 (en) * | 2017-10-23 | 2019-05-02 | アルプスアルパイン株式会社 | Abnormality detection device and abnormality detection method |
| US11085974B2 (en) | 2017-10-23 | 2021-08-10 | Alps Alpine Co., Ltd. | Anomaly detection device and anomaly detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2973444B2 (en) | 1999-11-08 |
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