JPH1138068A - Abnormality detecting device for electric apparatus - Google Patents
Abnormality detecting device for electric apparatusInfo
- Publication number
- JPH1138068A JPH1138068A JP19805997A JP19805997A JPH1138068A JP H1138068 A JPH1138068 A JP H1138068A JP 19805997 A JP19805997 A JP 19805997A JP 19805997 A JP19805997 A JP 19805997A JP H1138068 A JPH1138068 A JP H1138068A
- Authority
- JP
- Japan
- Prior art keywords
- abnormality
- constant current
- circuit
- voltage
- point
- 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
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気機器を構成要
素とする装置の電気機器の異常を検出する装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality of an electric device of an apparatus including the electric device as a component.
【０００２】[0002]
【従来の技術】複合サイクル発電プラントの一例として
排熱回収式複合サイクル発電プラントはガスタービンの
排気を排熱回収ボイラに導き、その熱を回収し蒸気を発
生させ蒸気タービンを駆動し、ガスタービンと蒸気ター
ビンにより発電機を駆動して発電を行う。このようなプ
ラントには多数の電気機器が使用されている。この電気
機器の内でも燃料流量制御などの制御関係に電磁弁やス
テッピングモータなどが使われており、これらが正常に
動作することがプラントを正常に稼働させる前提となっ
ている。2. Description of the Related Art As an example of a combined cycle power plant, a waste heat recovery type combined cycle power plant is configured to guide the exhaust of a gas turbine to an exhaust heat recovery boiler, recover the heat, generate steam, drive the steam turbine, and operate the gas turbine. And a steam turbine to drive a generator to generate power. Many electrical devices are used in such plants. Electromagnetic valves, stepping motors, and the like are used in control of fuel flow control and the like in these electric devices, and it is premised that normal operation of these devices operates the plant normally.
【０００３】図２はこのような電気機器の一例を示す図
である。直流２４Ｖの電源がリレー１を介して電磁弁２
と、４相ステッピングモータ５とそのドライバ６に接続
されている。電磁弁２と電源の間にはフォトカプラ３が
設けられ電磁弁２への電流の入り切りが行われ、フォト
カプラ３は端子４への信号の入力により動作する。４相
ステッピングモータ５の各相には電源より電流が供給さ
れ、この電流は４相ステッピングモータドライバにより
制御されている。なお相Ａ／は相Ａと１８０度位相の異
なる相を示す。FIG. 2 is a diagram showing an example of such an electric device. 24V DC power is supplied via relay 1 to solenoid valve 2
And a four-phase stepping motor 5 and its driver 6. A photocoupler 3 is provided between the solenoid valve 2 and a power supply, and a current flows to and from the solenoid valve 2, and the photocoupler 3 operates by inputting a signal to a terminal 4. A current is supplied from a power supply to each phase of the four-phase stepping motor 5, and this current is controlled by a four-phase stepping motor driver. The phase A / indicates a phase different from the phase A by 180 degrees.
【０００４】[0004]
【発明が解決しようとする課題】このようなプラントの
制御に使用される電気機器の点検はそれぞれ、絶縁抵抗
の計測、試験電圧を印加しての電流の計測などを単独に
行っており、人手により行われる範囲も多く、検査時間
もかかっていた。Inspection of the electric equipment used for controlling such a plant involves independently measuring the insulation resistance, measuring the current by applying a test voltage, and the like. And the inspection took time.
【０００５】本発明は、かかる問題点に鑑みてなされた
もので、装置を構成する電気機器を容易に検査し異常を
検出する電気機器の異常検出装置を提供することを目的
とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an abnormality detection apparatus for an electric device which easily inspects an electric device constituting the device and detects an abnormality.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明では、直流電源よりスイッチを介し
て各構成機器に電流を供給する電源回路と、この電源回
路のスイッチ出側にダイオードを介して接続され前記各
電気機器に直流定電流を供給する定電流源を有した定電
流回路と、前記定電流源の出側の電圧を測定しこの電圧
より前記各構成機器の異常を判断する異常判断手段を有
した異常検出回路と、を備え、前記スイッチを開き、前
記定電流回路より検査対象の機器に通電し、前記異常検
出回路により検査対象機器の異常を検出する。In order to achieve the above object, according to the first aspect of the present invention, there is provided a power supply circuit for supplying a current from a DC power supply to each component via a switch, and a power supply circuit connected to a switch output side of the power supply circuit. A constant current circuit having a constant current source connected through a diode and supplying a DC constant current to each of the electric devices, and measures a voltage at an output side of the constant current source to determine an abnormality of each of the component devices from the voltage. An abnormality detection circuit having abnormality judgment means for judging, wherein the switch is opened, power is supplied to the inspection target device from the constant current circuit, and the abnormality detection circuit detects an abnormality of the inspection target device.
【０００７】各構成機器は電源回路から直流を供給され
通常の作動をする。この各構成機器にダイオードを介し
て検査用の定電流を供給する定電流回路が接続されてい
る。この定電流回路の電流は電源回路の電流よりも小さ
いので、ダイオードにより電源回路からの大電流が流入
するのを阻止している。各構成機器は固有の抵抗値を有
しており、定電流を通電することにより抵抗値に応じた
電圧が発生する。しかし短絡があれば電圧は零となり、
断線があれば電流は流れず電源の電圧となる。各構成機
器の異常検出は、まずスイッチを開放して電源電流を遮
断し、定電流電源より検査対象機器に定電流を通電す
る。この機器が正常であれば、この機器の抵抗値に応じ
た電圧が定電流回路の出側で検出できる。この電圧を異
常検出回路で検出し、異常か否かを判断する。Each component device is supplied with a direct current from a power supply circuit and operates normally. A constant current circuit that supplies a constant current for inspection via a diode is connected to each component device. Since the current of the constant current circuit is smaller than the current of the power supply circuit, the diode prevents a large current from flowing from the power supply circuit. Each component device has a unique resistance value, and when a constant current is supplied, a voltage corresponding to the resistance value is generated. However, if there is a short circuit, the voltage will be zero,
If there is a disconnection, no current flows and the voltage becomes the power supply voltage. To detect an abnormality of each component, first, a switch is opened to cut off a power supply current, and a constant current is supplied from a constant current power supply to a device to be inspected. If this device is normal, a voltage corresponding to the resistance value of this device can be detected at the output side of the constant current circuit. This voltage is detected by an abnormality detection circuit, and it is determined whether or not the voltage is abnormal.
【０００８】請求項２の発明では、前記異常検出回路
は、予め記憶された前記各構成機器の定電流に対する正
常な電圧値と、前記定電流回路より前記各構成機器に定
電流を流して計測された電圧値とを比較して異常を判断
する異常判断手段を有している。According to the second aspect of the present invention, the abnormality detecting circuit measures the normal voltage value for the constant current of each of the constituent devices stored in advance and the constant current flowing from the constant current circuit to each of the constituent devices. And an abnormality judging means for judging an abnormality by comparing the detected voltage value.
【０００９】前記各構成機器には、例えば電磁弁や複数
相モータがあり、これらの機器はそれぞれ固有の抵抗値
を有している。したがって、これらの機器に定電流を流
すと抵抗値に比例した電圧を発生する。そこで、予め異
常のない構成機器に定電流を流して正常な電圧値を計測
し、これを異常検出手段に記憶させておけば、電気機器
に組み込まれた各構成機器に定電流を流して電圧値を計
測し、比較することにより異常か否かを判断することが
できる。Each of the above components includes, for example, a solenoid valve and a multi-phase motor, and each of these components has a unique resistance value. Therefore, when a constant current flows through these devices, a voltage proportional to the resistance value is generated. Therefore, if a constant current is applied to a component having no abnormality in advance to measure a normal voltage value, and this is stored in the abnormality detecting means, a constant current is applied to each component incorporated in the electrical device to supply a voltage. By measuring and comparing the values, it can be determined whether or not there is an abnormality.
【００１０】[0010]
【発明の実施の形態】以下本発明の実施形態について、
図面を参照して説明する。図１は本実施形態の電気機器
の異常検出装置を示す回路図である。検査対象電気機器
としては、図２で説明した電磁弁と４相ステッピングモ
ータの場合を示すが、この場合に限らず検査対象部が抵
抗を有する直流電気機器であれば、本発明は適用でき
る。直流２４Ｖの電源がリレー１を介して電磁弁２と、
４相ステッピングモータ５とそのドライバ６に接続され
ている。リレー１出側の位置をＢ点とする。電磁弁２と
Ｂ点の間にはフォトカプラ３が設けられ電磁弁２への電
流の入り切りが行われ、フォトカプラ３は端子４への信
号の入力により動作する。４相ステッピングモータ５の
各相および４相ステッピングモータドライバ６には電源
よりＢ点を経由して電流が供給され、各相の電流は４相
ステッピングモータドライバ６により制御されている。
なお相Ａ／は相Ａと１８０度位相の異なる相を示し、相
Ｂ／は相Ｂと１８０度位相の異なる相を示す。以上の構
成は各機器２，５を作動させる装置である。本発明は以
上の回路に次に述べる回路が追加される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described with reference to the drawings. FIG. 1 is a circuit diagram illustrating an abnormality detection device for an electric device according to the present embodiment. The case where the electric device to be inspected is the electromagnetic valve and the four-phase stepping motor described with reference to FIG. 2 is shown, but the present invention is not limited to this case, and the present invention can be applied to any DC electric device in which the inspected portion has resistance. A 24 V DC power supply is connected to the solenoid valve 2 via the relay 1,
It is connected to a four-phase stepping motor 5 and its driver 6. Let the position on the relay 1 outlet side be point B. A photocoupler 3 is provided between the solenoid valve 2 and the point B to turn on and off a current to the solenoid valve 2, and the photocoupler 3 operates by inputting a signal to a terminal 4. A current is supplied from a power source to each phase of the four-phase stepping motor 5 and the four-phase stepping motor driver 6 via point B, and the current of each phase is controlled by the four-phase stepping motor driver 6.
Phase A / indicates a phase 180 degrees different from phase A, and phase B / indicates a phase 180 degrees different from phase B. The above configuration is a device for operating each of the devices 2 and 5. In the present invention, the following circuit is added to the above circuit.
【００１１】リレー１の出側のＢ点にダイオード１２を
介して直流の定電流源１１が接続されている。定電流源
１１の出側の位置をＡ点とする。定電流源１１は例え
ば、２４Ｖの直流より５０ｍＡの直流電流を発生する回
路である。なお、リレー１を介して供給される作動電流
は、例えば２４０ｍＡであり、これに対して５０ｍＡは
充分小さいためこの電流により機器は作動しない。ダイ
オード１２は電源からの電流を遮断するために設けられ
ている。A DC constant current source 11 is connected via a diode 12 to a point B on the output side of the relay 1. Let the point on the output side of the constant current source 11 be point A. The constant current source 11 is a circuit that generates a direct current of 50 mA from a direct current of 24 V, for example. The operating current supplied via the relay 1 is, for example, 240 mA, whereas 50 mA is sufficiently small, so that the device does not operate due to this current. The diode 12 is provided to cut off current from a power supply.
【００１２】なお、請求項に記載の各回路と本図の具体
的な配線と機器との関係を説明すると、電源回路は、直
流２４Ｖとリレー１（スイッチ）からＢ点までの範囲に
対応し、定電流回路は、定電流源１１とＡ点とダイオー
ド１２を含みＢ点までの範囲に対応する。また異常検出
回路は、Ａ点より後述するオペアンプ１３、アイソレー
タ１４、Ａ／Ｄ変換器１５および異常判断手段１６まで
の範囲に対応する。The relationship between each circuit described in the claims and the specific wiring and equipment in the drawing will be described. The power supply circuit corresponds to a range from 24 V DC and a relay 1 (switch) to point B. , The constant current circuit includes the constant current source 11, the point A and the diode 12, and corresponds to the range up to the point B. Further, the abnormality detection circuit corresponds to a range from the point A to an operational amplifier 13, an isolator 14, an A / D converter 15, and an abnormality determination unit 16 to be described later.
【００１３】定電流源１１の出側のＡ点には、各電気機
器２，５に定電流を通電したとき、それらの有する抵抗
によって発生する電圧が現れる。このＡ点にオペアンプ
１３が接続され発生する電圧を増幅する。オペアンプ１
３で増幅された信号はアイソレータ１４でノイズ等を除
去され、Ａ／Ｄ変換器１５によりアナログデータよりデ
ジタルデータに変換される。異常判断手段１６はデジタ
ルデータによって表される電圧値と、予め格納されてい
る検査対象の機器の正常な場合の電圧値とを比較し、一
致すれば正常とし、不一致の場合で、零電圧のときは短
絡、定電流源１１の電圧となったときは断線と判定す
る。異常判断手段１６はＣＰＵとメモリを備え、メモリ
には各構成電気機器の抵抗やこれに定電流源１１より通
電したとき発生する電圧等が格納されている。At point A on the output side of the constant current source 11, when a constant current is applied to each of the electric devices 2 and 5, a voltage generated by the resistance of the electric devices appears. The operational amplifier 13 is connected to the point A to amplify the generated voltage. Operational amplifier 1
The signal amplified in 3 is subjected to noise removal in an isolator 14 and converted from analog data to digital data by an A / D converter 15. The abnormality judging means 16 compares the voltage value represented by the digital data with the pre-stored voltage value of the device to be inspected in the normal case, and if the values match, it is determined to be normal. When the voltage of the constant current source 11 becomes a short circuit, it is determined that the wire is broken. The abnormality determining means 16 includes a CPU and a memory, and the memory stores the resistance of each constituent electric device, a voltage generated when the constant current source 11 supplies current thereto, and the like.
【００１４】電磁弁２や４相ステッピングモータ５作動
時はリレー１を閉として電源より直流電流を供給する。
検査時はリレー１を開として電源よりの直流を遮断し、
定電流源１１の電流が供給される。電磁弁２にはフォト
カプラ３の端子４に信号を加えることにより定電流を加
えることができる。またステップモータ５の各相には４
相ステッピングモータドライバ６での制御により定電流
を加えることができる。When the solenoid valve 2 or the four-phase stepping motor 5 is operated, the relay 1 is closed and a DC current is supplied from a power supply.
During inspection, open relay 1 to cut off DC from power supply,
The current of the constant current source 11 is supplied. A constant current can be applied to the solenoid valve 2 by applying a signal to the terminal 4 of the photocoupler 3. Also, each phase of the step motor 5 has 4
A constant current can be applied under the control of the phase stepping motor driver 6.
【００１５】[0015]
【発明の効果】以上述べたように、本発明によれば、電
気機器にこれらを駆動する電源を遮断して定電流を加え
各機器の固有の抵抗によって発生する電圧を検出するこ
とにより、短絡、断線等の異常を検出できる。本発明は
直流で駆動される機器で固有の抵抗値を有する機器であ
れば適用するとができプラントに応じて柔軟な異常検出
ができる。As described above, according to the present invention, the power supply for driving electric devices is cut off, a constant current is applied, and the voltage generated by the inherent resistance of each device is detected. Abnormality such as disconnection can be detected. The present invention can be applied to any device that is driven by direct current and has a specific resistance value, and can perform flexible abnormality detection according to a plant.
【図１】本発明の実施形態の構成を示す図である。FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.
【図２】電磁弁と４相ステッピングモータに電源を供給
する図を示す。FIG. 2 shows a diagram for supplying power to a solenoid valve and a four-phase stepping motor.
１ リレー ２ 電磁弁 ３ フォトカプラ ４ 端子 ５ ステッピングモータ ６ ４相ステッピングモータのドライバ １１ 定電流源 １２ ダイオード １３ オペアンプ １４ アイソレータ １５ Ａ／Ｄ変換器 １６ 異常判断手段 DESCRIPTION OF SYMBOLS 1 Relay 2 Solenoid valve 3 Photocoupler 4 Terminal 5 Stepping motor 6 4-phase stepping motor driver 11 Constant current source 12 Diode 13 Operational amplifier 14 Isolator 15 A / D converter 16 Abnormality judgment means
Claims (2)
器に電流を供給する電源回路と、この電源回路のスイッ
チ出側にダイオードを介して接続され前記各電気機器に
直流定電流を供給する定電流源を有した定電流回路と、
前記定電流源の出側の電圧を測定しこの電圧より前記各
構成機器の異常を判断する異常判断手段を有した異常検
出回路と、を備え、前記スイッチを開き、前記定電流回
路より検査対象の機器に通電し、前記異常検出回路によ
り検査対象機器の異常を検出することを特徴とする電気
機器の異常検出装置。1. A power supply circuit for supplying a current from a DC power supply to each component via a switch, and a constant power supply connected to a switch output side of the power supply circuit via a diode to supply a constant DC current to each of the electric devices. A constant current circuit having a current source;
An abnormality detection circuit having abnormality judgment means for measuring an output voltage of the constant current source and judging an abnormality of each of the constituent devices from the voltage, opening the switch, and inspecting the constant current circuit from the constant current circuit. A device for detecting an abnormality of an electric device, wherein the device detects an abnormality of the device to be inspected by the abnormality detection circuit.
記各構成機器の定電流に対する正常な電圧値と、前記定
電流回路より前記各構成機器に定電流を流して計測され
た電圧値とを比較して異常を判断する異常判断手段を有
している、請求項１記載の電気機器の異常検出装置。2. The abnormality detection circuit according to claim 1, wherein a normal voltage value for a constant current of each of the component devices stored in advance, and a voltage value measured by flowing a constant current to each of the component devices from the constant current circuit. The abnormality detection device for an electric device according to claim 1, further comprising abnormality determination means for determining an abnormality by comparing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19805997A JPH1138068A (en) | 1997-07-24 | 1997-07-24 | Abnormality detecting device for electric apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19805997A JPH1138068A (en) | 1997-07-24 | 1997-07-24 | Abnormality detecting device for electric apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1138068A true JPH1138068A (en) | 1999-02-12 |
Family
ID=16384853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19805997A Pending JPH1138068A (en) | 1997-07-24 | 1997-07-24 | Abnormality detecting device for electric apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1138068A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007302090A (en) * | 2006-05-10 | 2007-11-22 | Matsushita Electric Ind Co Ltd | Path state determination device |
| CN103439610A (en) * | 2013-08-30 | 2013-12-11 | 国家电网公司 | Electric power quality detecting collecting terminal |
| CN103512768A (en) * | 2013-10-11 | 2014-01-15 | 国家电网公司 | System and method for monitoring performance of thermal power generating unit |
| CN104049207A (en) * | 2014-06-27 | 2014-09-17 | 国家电网公司 | Maintenance method for jamming condition of turning on and turning off of disconnecting switch |
| US9753074B2 (en) | 2012-07-26 | 2017-09-05 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Circuit arrangement for detecting a type for a solenoid valve |
| CN110849609A (en) * | 2019-11-29 | 2020-02-28 | 郑州工程技术学院 | Rotary machine vibration fault early warning device |
-
1997
- 1997-07-24 JP JP19805997A patent/JPH1138068A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007302090A (en) * | 2006-05-10 | 2007-11-22 | Matsushita Electric Ind Co Ltd | Path state determination device |
| US9753074B2 (en) | 2012-07-26 | 2017-09-05 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Circuit arrangement for detecting a type for a solenoid valve |
| US10145883B2 (en) | 2012-07-26 | 2018-12-04 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Circuit arrangement for detecting a type for a solenoid valve |
| CN103439610A (en) * | 2013-08-30 | 2013-12-11 | 国家电网公司 | Electric power quality detecting collecting terminal |
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