JPH0793071B2 - Detection device with failure determination function - Google Patents
Detection device with failure determination functionInfo
- Publication number
- JPH0793071B2 JPH0793071B2 JP3181056A JP18105691A JPH0793071B2 JP H0793071 B2 JPH0793071 B2 JP H0793071B2 JP 3181056 A JP3181056 A JP 3181056A JP 18105691 A JP18105691 A JP 18105691A JP H0793071 B2 JPH0793071 B2 JP H0793071B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- detection switch
- switch
- waveform
- detection
- 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 - Lifetime
Links
Landscapes
- Keying Circuit Devices (AREA)
- Switch Cases, Indication, And Locking (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、検出対象の変化に応じ
てオン状態とオフ状態とに切換わるスイッチング部分を
有する検出スイッチを用いた検出装置に関し、特に故障
検出機能を有する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 detection device using a detection switch having a switching portion that switches between an on state and an off state according to a change in a detection target, and more particularly to a device having a failure detection function. is there.
【０００２】[0002]
【従来の技術】従来から、検出対象の変化に応じてオン
状態とオフ状態とに切換わるスイッチング部分を有する
検出スイッチを用いた検出装置は種々知られている。例
えば複数箇所において検出対象がそれぞれの箇所に達し
たかどうかを調べ、それに応じた制御を行うというよう
な場合、上記複数箇所にマイクロスイッチ等の検出スイ
ッチを配設するとともに、これらを中央制御装置に導線
を介して電気的に接続し、中央制御装置に設けられたＡ
／Ｄ変換器または比較器等の検出信号処理部により検出
スイッチからの信号を判別するようになっている。2. Description of the Related Art Conventionally, various detection devices using a detection switch having a switching portion that switches between an on state and an off state according to a change in a detection target are known. For example, when checking whether or not the detection target has reached each of a plurality of locations and performing control according to the location, a detection switch such as a micro switch is arranged at the plurality of locations and the central control unit controls these. To the central control unit, which is electrically connected to the
A signal from a detection switch is discriminated by a detection signal processing unit such as a / D converter or a comparator.
【０００３】[0003]
【発明が解決しようとする課題】従来のこの種の装置
は、通常、単に検出スイッチのスイッチング部分（例え
ばマイクロスイッチの接点）が導線を介して制御装置に
接続され、この回路が上記スイッチング部分のオン、オ
フに応じて導通状態と非導通状態とに切換わることで検
出を行うようになっている。しかしこのような従来の構
造では、上記導線等に断線が生じてもこれと検出スイッ
チとを接続した回路が非導通となり、検出スイッチのオ
フ時と同じ状態となる。つまり、検出スイッチのスイッ
チング部分がオフとなっているときと、上記導線等の断
線とを、制御装置に入力される信号によって区別するこ
とができず、断線による故障を即座に確認することがで
きない。また、例えば作業者が検出対象および検出状態
を監視して、検出スイッチがオンとなるべきときにその
信号が得られないことで故障を判別したとしても、検出
スイッチそのものの故障か上記導線の断線かを見極める
ことが難しい。従って、故障の確認とその対応を迅速に
行うことができなかった。In such devices of the prior art, the switching part of the detection switch (for example, the contact of a microswitch) is usually connected to the control device via a conductor, and this circuit is connected to the switching part. Detection is performed by switching between a conducting state and a non-conducting state according to ON and OFF. However, in such a conventional structure, even if the conductor wire or the like is broken, the circuit connecting the conductor wire and the detection switch becomes non-conductive, and the state is the same as when the detection switch is off. In other words, when the switching part of the detection switch is off and when the conductor wire or the like is disconnected, it cannot be distinguished by the signal input to the control device, and the failure due to the disconnection cannot be immediately confirmed. . Further, for example, even if the operator monitors the detection target and the detection state and determines the failure by not obtaining the signal when the detection switch should be turned on, the failure of the detection switch itself or the disconnection of the lead wire. It is difficult to determine Therefore, it has not been possible to promptly confirm the failure and deal with it.
【０００４】本発明は、上記の事情に鑑み、検出スイッ
チのオン、オフと導線等の断線とをそれぞれ判別するこ
とができ、とくに簡単な構造によりながら上記の判別を
明確に行うことができ、断線による故障の確認とその対
応に便利な故障判別機能付検出装置を提供することを目
的とする。In view of the above-mentioned circumstances, the present invention can discriminate between ON and OFF of the detection switch and disconnection of a conducting wire or the like, and the above-mentioned discrimination can be clearly performed with a particularly simple structure. An object of the present invention is to provide a detection device with a failure determination function, which is convenient for confirming and responding to a failure due to disconnection.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の装置は、検出対象の変化に応じてオン状態
とオフ状態とに切換わるスイッチング部分を有する検出
スイッチと、信号線を介してこの検出スイッチに接続さ
れたコントロールユニットとを備えるとともに、上記コ
ントロールユニットに、発振器で構成されて特定波形の
信号を検出スイッチに供給する信号供給部と、この信号
供給部から上記検出スイッチを経てコントロールユニッ
トに入力される信号の波形を判別する信号処理部とを設
け、一方、上記検出スイッチに、スイッチング部分と並
列に、整流器で構成された波形変更手段を設け、上記ス
イッチ部分がオンの状態で上記スイッチ部分を通って送
られる特定波形の信号と、上記スイッチ部分がオフの状
態で上記波形変更手段で整流された信号と、断線による
信号の遮断とを上記信号処理部で判別するように構成し
たものである。In order to achieve the above object, the apparatus of the present invention includes a detection switch having a switching portion that switches between an on state and an off state according to a change in a detection target, and a signal line. A control unit connected to the lever detection switch is provided, and the control unit includes a signal supply unit configured by an oscillator to supply a signal of a specific waveform to the detection switch, and the signal supply unit via the detection switch. A signal processing unit that determines the waveform of the signal input to the control unit is provided, while the detection switch is provided with a waveform changing unit configured by a rectifier in parallel with the switching unit, and the switch unit is in the ON state. The signal with a specific waveform sent through the switch section and the waveform changing procedure when the switch section is off. A rectified signal in, the interruption of the signal by the disconnection is obtained by configured to determine at the signal processing unit.
【０００６】[0006]
【作用】上記発明の構成によれば、コントロールユニッ
トの検出信号処理部に入力される信号が上記発振器から
検出スイッチに供給された特定波形の信号であるか、整
流された信号であるかによって検出スイッチのオン、オ
フが区別され、さらに断線時は信号が遮断されることで
これが検出スイッチのオン、オフと区別される。According to the structure of the present invention, the detection signal processing section of the control unit detects whether the signal input is the signal of the specific waveform supplied from the oscillator to the detection switch or the rectified signal. The on / off of the switch is distinguished, and when the wire is broken, the signal is cut off to distinguish it from the on / off of the detection switch.
【０００７】[0007]
【実施例】本発明の実施例を図面に基づいて説明する。
図１および図２は本発明の一実施例を示し、これらの図
において、１は検出スイッチ、２はコントロールユニッ
トである。当実施例において検出スイッチ１はマイクロ
スイッチで構成され、検出対象物が検出位置に達したと
きにこれを検出する。例えば、図１に示すように、レー
ル３に沿って移動するバケット４によって物品を各種箇
所に搬送するような搬送装置に適用して、バケット４が
所定位置に達したときにこれを検出する場合、上記所定
位置に検出スイッチ１が設置されるとともに、バケット
４に、検出スイッチ１側に突出する被検出部材５が取り
付けられる。そして、バケット４が所定位置まで移動し
たときに被検出部材５が検出スイッチ１の可動片１ａを
押動するようになっている。また、コントロールユニッ
ト２は搬送装置駆動系統の制御等に適した場所に設置さ
れ、このコントロールユニット２と検出スイッチ１と
は、一対の導線（信号線）６ａ，６ｂからなるハーネス
６によって結ばれている。Embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of the present invention, in which 1 is a detection switch and 2 is a control unit. In this embodiment, the detection switch 1 is composed of a micro switch, and detects the object to be detected when it reaches the detection position. For example, as shown in FIG. 1, when the bucket 4 moving along a rail 3 is used to convey an article to various places and is detected when the bucket 4 reaches a predetermined position The detection switch 1 is installed at the predetermined position, and the detected member 5 protruding toward the detection switch 1 is attached to the bucket 4. Then, when the bucket 4 moves to a predetermined position, the detected member 5 pushes the movable piece 1a of the detection switch 1. Further, the control unit 2 is installed in a place suitable for controlling the drive system of the conveying device, and the control unit 2 and the detection switch 1 are connected by a harness 6 composed of a pair of conductors (signal lines) 6a, 6b. There is.
【０００８】図２に示すように、上記検出スイッチ１
は、検出対象の変化に応じてオン状態とオフ状態とに切
換わるスイッチング部分１１を有し、このスイッチング
部分１１は通常時にオフ（常開）で、上記可動片１ａが
押動されたときにオンとなる接点で構成されている。さ
らに検出スイッチ１には、整流器１２で構成された波形
変更手段が設けられている。一方、上記コントロールユ
ニット２には、発振器２１で構成された信号供給部と、
波形検出器２２で構成された信号処理部とが設けられて
いる。As shown in FIG. 2, the detection switch 1
Has a switching portion 11 that switches between an on state and an off state in accordance with a change in a detection target. The switching portion 11 is normally off (normally open), and when the movable piece 1a is pushed. It consists of contacts that turn on. Further, the detection switch 1 is provided with a waveform changing means composed of a rectifier 12. On the other hand, the control unit 2 includes a signal supply unit including an oscillator 21,
The signal processing unit including the waveform detector 22 is provided.
【０００９】上記コントロールユニット２における発振
器２１は、特定波形の信号を検出スイッチ１に供給する
ためのもので、例えば一定周期で正負反転するパルス波
形の信号を発生するようになっている。波形検出器２２
は、検出スイッチ１を経てコントロールユニット２に入
力される信号の波形を判別する。また、検出スイッチ１
における整流器１２は、半波整流するダイオード１３か
らなり、スイッチング部分１１と並列に接続されてい
る。The oscillator 21 in the control unit 2 is for supplying a signal having a specific waveform to the detection switch 1, and is adapted to generate a signal having a pulse waveform which is positively / negatively inverted at a constant cycle, for example. Waveform detector 22
Determines the waveform of the signal input to the control unit 2 via the detection switch 1. Also, the detection switch 1
The rectifier 12 in is composed of a diode 13 for half-wave rectification, and is connected in parallel with the switching portion 11.
【００１０】この実施例によると、検出スイッチ１のス
イッチング部分１１がオンのときと、オフのときと、導
線６ａ，６ｂの断線時とで、波形検出器２２に入力され
る信号は、図３に示すように変わる。すなわち、スイッ
チング部分１１がオンのときは、発振器２１によって与
えられるパルス波形の信号ＳＡがそのまま波形検出器２
２に入力され、また、スイッチング部分１１がオフのと
きは、整流器１２により半波整流された信号ＳＢが波形
検出器１２に入力される。一方、断線時には、波形検出
器１２に入力される信号は無波形（符号ＳＯ）となる。According to this embodiment, the signal input to the waveform detector 22 when the switching portion 11 of the detection switch 1 is on, when it is off, and when the conductors 6a and 6b are disconnected is as shown in FIG. It changes as shown in. That is, when the switching portion 11 is turned on, the signal SA having a pulse waveform provided by the oscillator 21 remains as it is in the waveform detector 2.
When the switching portion 11 is off, the signal SB half-wave rectified by the rectifier 12 is input to the waveform detector 12. On the other hand, at the time of disconnection, the signal input to the waveform detector 12 has no waveform (symbol SO).
【００１１】従って、検出スイッチがオンの場合とオフ
の場合と断線が生じた場合とを、信号波形の違いによっ
て明確に区別することができる。しかも、コントロール
ユニット２側に発振器２１および波形検出器２２を設け
る一方、検出スイッチ１にはスイッチ部分１１に加えて
波形検出器１２を設けただけの簡単な構造によりなが
ら、スイッチのオン、オフおよび断線の判別を行うこと
ができる。Therefore, the case where the detection switch is on, the case where the detection switch is off, and the case where the disconnection occurs can be clearly distinguished by the difference in the signal waveform. Moreover, while the oscillator 21 and the waveform detector 22 are provided on the control unit 2 side, the detection switch 1 has a simple structure in which the waveform detector 12 is provided in addition to the switch portion 11, but the switch is turned on and off. The disconnection can be determined.
【００１２】なお、この実施例における発振器２１はパ
ルス波以外の交流電気振動を生じさせるものでもよく、
また整流器１２も図示のものに限らず、全波整流するも
の等でもよい。It should be noted that the oscillator 21 in this embodiment may be one that produces AC electric vibration other than a pulse wave,
Further, the rectifier 12 is not limited to the one shown in the figure, and may be a full-wave rectifier or the like.
【００１３】[0013]
【発明の効果】以上のように本発明の装置によると、ス
イッチング部分を有する検出スイッチと、これに導線を
介して接続されたコントロールユニットとを備えるとと
もに、上記コントロールユニットに発振器および信号処
理部を設け、一方、上記検出スイッチにスイッチ部分と
並列に整流器を設け、上記スイッチ部分がオンの状態で
上記スイッチ部分を通って送られる特定波形の信号と、
上記スイッチ部分がオフの状態で上記整流器で整流され
た信号と、断線による信号の遮断とを上記信号処理部で
判別するようにしているため、上記断線を即座に確認す
ることができ、対応が容易となる。とくに、比較的簡単
な構造によりながら、検出スイッチがオンの場合とオフ
の場合とで明確に波形を異ならせ、さらに、これらの場
合と断線時とで明確に信号を異ならせることができ、判
別を容易に、かつ正確に行うことができる。As described above, according to the apparatus of the present invention, the detection switch having the switching portion and the control unit connected to the detection switch via the conductor are provided, and the control unit is provided with the oscillator and the signal processing section. On the other hand, a rectifier is provided in parallel with the switch part in the detection switch, and a signal of a specific waveform sent through the switch part in a state where the switch part is on,
Since the signal processing unit discriminates between the signal rectified by the rectifier in the state where the switch portion is off and the interruption of the signal due to the disconnection, the disconnection can be immediately confirmed, and the correspondence can be taken. It will be easy. In particular, even though the detection switch is on and off, the waveforms can be clearly different and the signals can be made to be clearly different between these cases and the disconnection even though the structure is relatively simple. Can be performed easily and accurately.
【図１】本発明の一実施例による装置全体の概略図であ
る。FIG. 1 is a schematic view of an entire apparatus according to an embodiment of the present invention.
【図２】同実施例の装置の電気回路図である。FIG. 2 is an electric circuit diagram of the apparatus of the embodiment.
【図３】同実施例による場合の波形検出器に入力される
信号を示す説明図である。FIG. 3 is an explanatory diagram showing signals input to a waveform detector in the case of the same embodiment.
１ 検出スイッチ １１ スイッチング部分 １２ 整流器 ２ コントロールユニット ２１ 発振器 ２２ 波形検出器 1 Detection Switch 11 Switching Part 12 Rectifier 2 Control Unit 21 Oscillator 22 Waveform Detector
Claims (1)
状態とに切換わるスイッチング部分を有する検出スイッ
チと、信号線を介してこの検出スイッチに接続されたコ
ントロールユニットとを備えるとともに、上記コントロ
ールユニットに、発振器で構成されて特定波形の信号を
検出スイッチに供給する信号供給部と、この信号供給部
から上記検出スイッチを経てコントロールユニットに入
力される信号の波形を判別する信号処理部とを設け、一
方、上記検出スイッチに、スイッチング部分と並列に、
整流器で構成された波形変更手段を設け、上記スイッチ
部分がオンの状態で上記スイッチ部分を通って送られる
特定波形の信号と、上記スイッチ部分がオフの状態で上
記波形変更手段で整流された信号と、断線による信号の
遮断とを上記信号処理部で判別するように構成したこと
を特徴とする故障判別機能付検出装置。1. An on state and an off state according to a change in a detection target.
A detection switch having a switching part that switches between
And a connector connected to this detection switch via the signal line.
And a control unit.
The unit is configured with an oscillator to output a signal with a specific waveform.
A signal supply unit that supplies the detection switch and the signal supply unit
To the control unit via the above detection switch
And a signal processing unit that determines the waveform of the input signal.
On the other hand, in the above detection switch, in parallel with the switching part,
The above-mentioned switch is provided with a waveform changing means composed of a rectifier.
Sent through the above switch part with part on
The signal with a specific waveform and the above switch part is turned off.
The signal rectified by the waveform changing means and the signal due to disconnection
A detection device with a failure discriminating function, characterized in that it is configured to discriminate between interruption and interruption by the signal processing unit .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181056A JPH0793071B2 (en) | 1991-07-22 | 1991-07-22 | Detection device with failure determination function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3181056A JPH0793071B2 (en) | 1991-07-22 | 1991-07-22 | Detection device with failure determination function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0528872A JPH0528872A (en) | 1993-02-05 |
| JPH0793071B2 true JPH0793071B2 (en) | 1995-10-09 |
Family
ID=16094008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3181056A Expired - Lifetime JPH0793071B2 (en) | 1991-07-22 | 1991-07-22 | Detection device with failure determination function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793071B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506625A (en) * | 2003-06-30 | 2007-03-22 | インベンテイオ・アクテイエンゲゼルシヤフト | Safety system for elevator structures |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264587B (en) * | 2008-12-22 | 2014-06-25 | 丰田自动车株式会社 | Hybrid vehicle |
| JP6259924B2 (en) * | 2014-09-29 | 2018-01-10 | 株式会社ジーシー | Dental unit |
| KR102580637B1 (en) * | 2016-08-11 | 2023-09-19 | 엘지이노텍 주식회사 | Apparatus for detecting circuit failure and electronic vehicle charging controller including thereof |
| JP7086192B2 (en) | 2018-07-20 | 2022-06-17 | アルプスアルパイン株式会社 | Switch circuits, switch devices and systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6395125U (en) * | 1986-12-12 | 1988-06-20 | ||
| JPH0812762B2 (en) * | 1987-07-02 | 1996-02-07 | シ−ケ−ディ株式会社 | Fault diagnosis device for detection switch |
-
1991
- 1991-07-22 JP JP3181056A patent/JPH0793071B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 杉山稔「位置決め技術」第９刷（昭５７−１２−１）日刊工業新聞社Ｐ．２７−２８、Ｐ．１４２−１４３，Ｐ．１５０ |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506625A (en) * | 2003-06-30 | 2007-03-22 | インベンテイオ・アクテイエンゲゼルシヤフト | Safety system for elevator structures |
| JP4647599B2 (en) * | 2003-06-30 | 2011-03-09 | インベンテイオ・アクテイエンゲゼルシヤフト | Safety system for elevator structures |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0528872A (en) | 1993-02-05 |
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