JP2010140803A - Self-diagnosis method of contact - Google Patents
Self-diagnosis method of contact Download PDFInfo
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- JP2010140803A JP2010140803A JP2008317140A JP2008317140A JP2010140803A JP 2010140803 A JP2010140803 A JP 2010140803A JP 2008317140 A JP2008317140 A JP 2008317140A JP 2008317140 A JP2008317140 A JP 2008317140A JP 2010140803 A JP2010140803 A JP 2010140803A
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Abstract
Description
本発明は、電磁リレーやソリッドステート・リレー等の接点機能を有する部品の接および断の動作点検に用いられる自己診断方法に関するものである。 The present invention relates to a self-diagnosis method used for checking operation of contact and disconnection of a component having a contact function such as an electromagnetic relay or a solid state relay.
電磁リレー等の接点の動作点検において、接点の入力側に接続されている電源（又は信号出力回路）から接点の出力側に接続されている負荷側回路（又は装置）に影響を与えずに電磁リレーの接点を単独に動作点検を実施できる従来技術は存在しない。 When checking the operation of contacts such as electromagnetic relays, the power supply (or signal output circuit) connected to the input side of the contact does not affect the load side circuit (or device) connected to the output side of the contact. There is no prior art that can check the operation of a relay contact alone.
従来の接点自己診断方法の例として電磁リレーの場合、図１及び図２示す方式が存在する。図１の方式は電磁リレーが１回路２接点の場合の自己診断方法である。電磁リレー１の接点１ａの入力に電源（又は信号出力回路）３が、出力側に負荷側回路（又は装置）２が接続され、接点１ｃを接点の診断用として用いるために接点１ｃの入力側に診断信号発生部４が接続され、接点１ｃの出力側に診断信号受信部５ａが接続され、診断信号の受信状態により接点の動作状況を判断する判定部６で構成されている。 In the case of an electromagnetic relay as an example of a conventional contact self-diagnosis method, there are methods shown in FIGS. The system of FIG. 1 is a self-diagnosis method when the electromagnetic relay has one circuit and two contacts. The power source (or signal output circuit) 3 is connected to the input of the contact 1a of the electromagnetic relay 1, the load side circuit (or device) 2 is connected to the output side, and the contact 1c is used for the diagnosis of the contact. The diagnostic signal generator 4 is connected to the diagnostic signal generator 5 and the diagnostic signal receiver 5a is connected to the output side of the contact 1c. The diagnostic signal generator 4 includes a determination unit 6 that determines the operating state of the contact based on the reception state of the diagnostic signal.
診断方法は、電源（又は信号出力回路）３の出力を停止した状態で接点制御信号７からリレーコイル１ｂに電源を供給すると、接点１ａおよび１ｃが接となる。この状態で診断信号発生部４から診断用信号を出力し、接点１ｃを介して診断信号受信部５ａで診断用信号を受信し、判定部６で診断信号の有無を判定し接点１ｃの接状態を点検する。 In the diagnosis method, when power is supplied from the contact control signal 7 to the relay coil 1b while the output of the power source (or signal output circuit) 3 is stopped, the contacts 1a and 1c are brought into contact. In this state, a diagnostic signal is output from the diagnostic signal generator 4, the diagnostic signal is received by the diagnostic signal receiver 5a via the contact 1c, the presence or absence of the diagnostic signal is determined by the determination unit 6, and the contact state of the contact 1c Check.
同様に接点の断状態を点検するため、接点制御信号７からリレーコイル１ｂに供給している電源を停止させ、接点１ａおよび１ｃを断状態にする。この状態で前記と同じ方法に判定部６により診断信号の有無を判定する。 Similarly, in order to check the disconnection state of the contact, the power supplied from the contact control signal 7 to the relay coil 1b is stopped, and the contacts 1a and 1c are disconnected. In this state, the determination unit 6 determines the presence or absence of a diagnostic signal in the same manner as described above.
本来は、接点１ａの動作点検を実施しなければならないが、従来の方式では、診断信号により負荷側回路（又は装置）２に電気的な影響を与えるため、装置の機能として実際に用いられる接点１ｃの点検が出来なく、装置の機能としては未使用の接点１ｃの動作状況を点検していることから推定による接点１ａの点検である。 Originally, the operation of the contact 1a must be inspected. However, in the conventional method, the diagnostic circuit causes an electrical influence on the load side circuit (or device) 2, and therefore the contact actually used as a function of the device. Since the check of 1c cannot be performed and the operation state of the unused contact 1c is checked as a function of the apparatus, the contact 1a is estimated by estimation.
図２のパワーリレーのような電磁リレーが１回路１接点の場合は、点検用の接点を確保することができない為、全く接点の点検が行なえない方式である。 When an electromagnetic relay such as the power relay of FIG. 2 has one contact per circuit, a contact for inspection cannot be secured, so that the contact cannot be inspected at all.
電磁リレーの接点の構成が１回路２接点以上の場合は、２接点のうち１接点を診断用として用い、もう一方を実際に使用する回路や装置用の主接点として接続し、診断用の接点動作の点検結果により、実際に点検していない主接点側の接点も同様な点検結果として推定した点検であった。 If the contact configuration of the electromagnetic relay is more than 2 contacts per circuit, use one of the 2 contacts for diagnosis, and connect the other as the main contact for the circuit or device that is actually used. Based on the results of the operation inspection, the main contact side contacts that were not actually inspected were also inspected as similar inspection results.
また、電磁リレーの接点の構成が１回路１接点の場合は、接点に接続される回路や装置の接続状態では、診断用信号により電気的ストレスを与えるため実施できず、点検が不可能であった。 In addition, when the contact configuration of the electromagnetic relay is one circuit and one contact, the circuit or device connected to the contact cannot be inspected because it cannot be performed because electrical stress is applied by a diagnostic signal. It was.
また、前記の理由により実際に使用される接点の点検が確実に実施できないため、実運用上で電磁リレーが動作するまでは故障を検出することができない。このように事前の点検が実施できないことにより、運用上状態で装置が緊急停止等の状態になり高信頼性を要求される装置においては、重大なる問題があった。 Moreover, since the contact point actually used cannot be inspected reliably for the above reason, a failure cannot be detected until the electromagnetic relay operates in actual operation. As a result of the fact that prior inspection cannot be performed in this way, there has been a serious problem in an apparatus that requires high reliability because the apparatus is in an emergency stop state in an operational state.
このように従来の方式は、接点が装置の動作中に動作する場面において、動作するまでは故障を検出することが出来ないことから自己診断による故障検出率や信頼性が低い問題がある。また、診断用専用の接点を増やさなければならないため部品単価を抑えることができない問題がある。
As described above, the conventional method has a problem that the failure detection rate and the reliability by the self-diagnosis are low because the failure cannot be detected until the contact is operated in the scene where the contact is operated during the operation of the apparatus. In addition, there is a problem that the unit cost of components cannot be reduced because the number of contacts dedicated for diagnosis must be increased.
電源（又は信号出力回路）からの出力が、電磁リレーやソリッドステート・リレー等の接点を介して負荷側回路（又は装置）に供給するリレー回路で、前記リレーの接点の一方に、接点の接断を診断するための診断信号発生部を接続して、前記リレーの接点の他方に前記診断信号発生部からの信号を検波する検波部を接続して、検波部からの出力を判定部で判定して前記リレーの接断機能を自己診断することを特徴とする。 A relay circuit that supplies output from a power supply (or signal output circuit) to a load-side circuit (or device) via a contact such as an electromagnetic relay or a solid-state relay. A diagnostic signal generator for diagnosing disconnection is connected, a detector for detecting the signal from the diagnostic signal generator is connected to the other contact of the relay, and an output from the detector is determined by the determination unit Then, the connection / disconnection function of the relay is self-diagnosed.
また、前記自己診断方式において、電源（又は信号出力回路）と前記リレーの一方の接点との間にフィルタを挿入し、また、前記リレーの他方の接点と負荷側回路（又は装置）との間にフィルタを挿入して前記診断信号発生部から電源（又は信号出力回路）および負荷側回路（又は装置）に、前記診断信号発生部から出力される信号からの電気的な影響を阻止することを特徴とする。 In the self-diagnosis method, a filter is inserted between the power supply (or signal output circuit) and one contact of the relay, and between the other contact of the relay and the load side circuit (or device). A filter is inserted into the power supply (or signal output circuit) and the load side circuit (or device) from the diagnostic signal generator to prevent electrical influence from the signal output from the diagnostic signal generator. Features.
本発明によれば、図１に示すように実際に使用する電磁リレーの接点１ａの接断の診断を電磁リレー内蔵の他の接点１ｃを使用して類推して診断するのでなく、図３に示すように、診断信号発生部４、検波部５ｂ、判定部６を設けることにより実際に使用する電磁リレーの接点１ａの診断が可能となり信頼性の高い自己診断が可能となる。 According to the present invention, as shown in FIG. 1, the diagnosis of the disconnection of the contact 1a of the electromagnetic relay actually used is not diagnosed by analogy using the other contact 1c with a built-in electromagnetic relay. As shown, by providing the diagnostic signal generation unit 4, the detection unit 5b, and the determination unit 6, it is possible to diagnose the contact 1a of the electromagnetic relay that is actually used, and a highly reliable self-diagnosis is possible.
また図３に示すように入力フィルタ部８、出力フィルタ部９を設けることのより電源（又は信号出力回路）３および負荷側回路（又は装置）２にストレスを与えることなく自己診断点検ができる。
Further, as shown in FIG. 3, by providing the input filter unit 8 and the output filter unit 9, self-diagnosis inspection can be performed without applying stress to the power supply (or signal output circuit) 3 and the load side circuit (or device) 2.
本発明の実施形態を電磁リレーの１回路１接点を例に挙げ図３に基づいて以下に説明する。 An embodiment of the present invention will be described below with reference to FIG.
図３の１は１回路１接点の電磁リレーで、接点１ａを接または断にするためのリレーコイル１ｂである。このリレーコイル１ｂに接点制御信号７から電源を供給することで接点１ａは接または断状態に変移する。この接点１ａの入力側とは、電源や信号を出力するための電源（または信号出力回路）３が入力フィルタ部８を介して接続され、接点１ａの出力側とは負荷側回路（又は装置）２がフィルタ部９を介して接続されている。 Reference numeral 1 in FIG. 3 denotes an electromagnetic relay having one contact per circuit, which is a relay coil 1b for connecting or disconnecting the contact 1a. By supplying power to the relay coil 1b from the contact control signal 7, the contact 1a changes to a connected or disconnected state. A power source (or signal output circuit) 3 for outputting a power source or a signal is connected to the input side of the contact 1a via an input filter unit 8, and a load side circuit (or device) is connected to the output side of the contact 1a. 2 are connected via a filter unit 9.
また、接点１ａの入力側には診断信号発生部４が接続され、接点１ａの出力側には検波部５ｂが接続されている。
A diagnostic signal generator 4 is connected to the input side of the contact 1a, and a detector 5b is connected to the output side of the contact 1a.
接点１ａの点検方法は、リレーコイル１ｂに接点制御信号７からリレーコイル用の電源を出力しない場合、接点１ａは断状態である。この状態で診断用信号発生部４から診断用信号として高周波帯域のホワイトノイズや高周波なパルスをパルス的に出力する。 When the contact coil 1a is not output from the contact control signal 7 to the relay coil 1b, the contact 1a is in a disconnected state. In this state, white noise in the high frequency band or a high frequency pulse is output in a pulse manner from the diagnostic signal generator 4 as a diagnostic signal.
診断信号発生部４から診断用信号を出力すると接点１ａの出力側には診断用信号が出力されないため、検波部５ｂでは診断用信号を受信できなく、その結果で判定部６では、診断用信号を出力して、接点を介して診断用信号が受信できないことから、接点１ａの断状態は正常と認識する。 When a diagnostic signal is output from the diagnostic signal generator 4, no diagnostic signal is output to the output side of the contact point 1a. Therefore, the detection unit 5b cannot receive the diagnostic signal, and as a result, the determination unit 6 receives the diagnostic signal. Since the diagnostic signal cannot be received through the contact, the disconnection state of the contact 1a is recognized as normal.
接点１ａに入力された診断用信号は、入力フィルタ部８内の高周波を抑制するフェライトビーズなどにより高周波成分が除去され、電源（又は信号出力回路）３へは、電気的な影響やストレスを与えない。 The diagnostic signal input to the contact 1a is removed of high frequency components by ferrite beads or the like that suppress high frequency in the input filter unit 8, and the power supply (or signal output circuit) 3 is electrically affected or stressed. Absent.
次に接点制御信号７からリレーコイル用の電源を出力すると接点１ａは接状態になる。この状態で診断信号発生部４から前記と同様に診断用信号を出力すると接点１ａの出力側の出力フィルタ部９と検波部５ｂに診断用信号が出力される。検波部５ｂで受信した診断用信号は、信号の高周波成分を検波し、検波した信号を判定部６に出力し、判定部６では接点を介して診断用信号を受信したと見なし、接点１ａの接状態は正常と認識する。 Next, when the relay coil power is output from the contact control signal 7, the contact 1a is brought into a contact state. In this state, when a diagnostic signal is output from the diagnostic signal generator 4 in the same manner as described above, a diagnostic signal is output to the output filter 9 and the detector 5b on the output side of the contact 1a. The diagnostic signal received by the detection unit 5b detects a high frequency component of the signal, outputs the detected signal to the determination unit 6, and the determination unit 6 considers that the diagnostic signal has been received via the contact, and the contact 1a The contact state is recognized as normal.
接点１ａの入力に接続された入力フィルタ部８と接点１ａの出力側の出力フィルタ部９に入力された診断用信号は、両フィルタ部内の高周波を抑制するフェライトビーズなどにより高周波成分が除去されることにより、接点１ａの入力側の電源（又は信号出力回路）３および接点１ａの出力側の負荷側回路（又は装置）２には、電気的な影響やストレスを与えない。 The diagnostic signal input to the input filter unit 8 connected to the input of the contact 1a and the output filter unit 9 on the output side of the contact 1a has high frequency components removed by ferrite beads or the like that suppress high frequencies in both filter units. As a result, the power source (or signal output circuit) 3 on the input side of the contact 1a and the load side circuit (or device) 2 on the output side of the contact 1a are not electrically affected or stressed.
このように接点１ａの断と接状態の診断を診断する接点に接続されている電源（又は信号出力回路）３と負荷回路（又は装置）２に電気的影響やストレスを与えることなく、診断用信号で実際に使用されている接点１ａの点検を行なうことが出来ることから、従来不可能とされていた診断用信号により影響を受ける回路や装置のインタフェースに接点を使用することが可能となる。 As described above, the power supply (or signal output circuit) 3 and the load circuit (or device) 2 connected to the contact for diagnosing disconnection and contact state diagnosis of the contact 1a are used for diagnosis without causing electrical influence or stress. Since the contact point 1a actually used in the signal can be inspected, the contact point can be used for an interface of a circuit or a device that is affected by a diagnostic signal that has been impossible in the past.
従来の実施例では、爆発物を爆発させるための最終信号用（図３の電源（又は信号出力回路）３に該当）に使用されている電磁リレーの場合は、爆発させない限り電磁リレーの故障を従来は発見することが出来なかった。 In the conventional example, in the case of the electromagnetic relay used for the final signal for exploding explosives (corresponding to the power source (or signal output circuit) 3 in FIG. 3), the electromagnetic relay may fail unless it is exploded. Previously it was not possible to discover.
この段階では、爆発物（図３の負荷側回路（又は装置）２に該当）が活性化されているため、爆発物が最も危険な状態で、爆発物の活性化が停止するまでは近づくこともできない状況となる。爆発出来ない緊急事態に加え結果的に人命に関わる重大問題となる。 At this stage, the explosives (corresponding to the load side circuit (or device) 2 in FIG. 3) are activated, so the explosives are in the most dangerous state and approach until the explosives stop activating. It becomes a situation that can not be. In addition to emergencies that cannot explode, this results in serious problems related to human life.
本発明の方式は、爆発物を爆発させるための最終信号用を出力する直前に接点の診断が可能となることから、電磁リレーの故障による不爆発を防ぐことが可能となり、付帯効果として爆発の安全運用が実現できる。 The method of the present invention makes it possible to diagnose the contact point immediately before outputting the final signal for exploding explosives, so that it is possible to prevent non-explosion due to failure of the electromagnetic relay, and as an incidental effect, Safe operation can be realized.
本発明の説明には電磁リレーを例として説明したが、電磁リレーに限定されることはなく、一般的なリレーにも適用される。
In the description of the present invention, an electromagnetic relay has been described as an example. However, the present invention is not limited to an electromagnetic relay, and can be applied to a general relay.
１ 電磁リレー
１ａ電磁リレーの接点
１ｂ電磁リレーのコイル
１ｃ電磁リレーの接点
２ 負荷側回路（又は装置）
３ 電源（又は信号出力回路）
４ 診断信号発生部
５ａ診断信号受信部
５ｂ検波部
６ 判定部
７ 接点制御信号
８ 入力フィルタ部
９ 出力フィルタ部
DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 1a Electromagnetic relay contact 1b Electromagnetic relay coil 1c Electromagnetic relay contact 2 Load side circuit (or device)
3 Power supply (or signal output circuit)
4 diagnostic signal generator 5a diagnostic signal receiver 5b detector 6 determination unit 7 contact control signal 8 input filter unit 9 output filter unit
Claims (4)
4. A contact self-diagnosis system, wherein high-frequency white noise and high-frequency pulses are output in a pulse manner as signals of the diagnostic signal generator of claim 1, 2, and 3.
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| JP2008317140A JP2010140803A (en) | 2008-12-12 | 2008-12-12 | Self-diagnosis method of contact |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008317140A JP2010140803A (en) | 2008-12-12 | 2008-12-12 | Self-diagnosis method of contact |
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| Publication Number | Publication Date |
|---|---|
| JP2010140803A true JP2010140803A (en) | 2010-06-24 |
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| JP2008317140A Pending JP2010140803A (en) | 2008-12-12 | 2008-12-12 | Self-diagnosis method of contact |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012128133A1 (en) * | 2011-03-22 | 2012-09-27 | 日立建機株式会社 | Construction machinery |
| JP2020134157A (en) * | 2019-02-13 | 2020-08-31 | 株式会社デンソーウェーブ | Failure diagnosis circuit for relay for plc |
| WO2021014558A1 (en) * | 2019-07-23 | 2021-01-28 | 三菱電機株式会社 | Input diagnosis device and input diagnosis method |
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| JPH05312385A (en) * | 1992-05-11 | 1993-11-22 | Sanyo Electric Co Ltd | Controller for air conditioner |
| JP2005505109A (en) * | 2001-09-22 | 2005-02-17 | ピルツ ゲーエムベーハー アンド コー． | Safe switching device for safely disconnecting electrical loads |
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| JPH0531081U (en) * | 1991-05-20 | 1993-04-23 | アジアエレクトロニクス株式会社 | Relay circuit |
| JPH05312385A (en) * | 1992-05-11 | 1993-11-22 | Sanyo Electric Co Ltd | Controller for air conditioner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012128133A1 (en) * | 2011-03-22 | 2012-09-27 | 日立建機株式会社 | Construction machinery |
| JP2020134157A (en) * | 2019-02-13 | 2020-08-31 | 株式会社デンソーウェーブ | Failure diagnosis circuit for relay for plc |
| US11190004B2 (en) | 2019-02-13 | 2021-11-30 | Denso Wave Incorporated | Relay failure diagnosis circuit |
| JP7172695B2 (en) | 2019-02-13 | 2022-11-16 | 株式会社デンソーウェーブ | Fault diagnosis circuit for PLC relays |
| WO2021014558A1 (en) * | 2019-07-23 | 2021-01-28 | 三菱電機株式会社 | Input diagnosis device and input diagnosis method |
| WO2021015244A1 (en) * | 2019-07-23 | 2021-01-28 | 三菱電機株式会社 | Input device, and input diagnosing method |
| JPWO2021015244A1 (en) * | 2019-07-23 | 2021-09-13 | 三菱電機株式会社 | Input device and input diagnostic method |
| JPWO2021014558A1 (en) * | 2019-07-23 | 2021-09-27 | 三菱電機株式会社 | Input diagnostic device and input diagnostic method |
| US11448699B2 (en) | 2019-07-23 | 2022-09-20 | Mitsubishi Electric Corporation | Input device, and input diagnosing method |
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