JPS5958916A - Contact signal generating circuit - Google Patents
Contact signal generating circuitInfo
- Publication number
- JPS5958916A JPS5958916A JP16878482A JP16878482A JPS5958916A JP S5958916 A JPS5958916 A JP S5958916A JP 16878482 A JP16878482 A JP 16878482A JP 16878482 A JP16878482 A JP 16878482A JP S5958916 A JPS5958916 A JP S5958916A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- circuit
- current
- voltage
- capacitor
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
- H01H1/605—Cleaning of contact-making surfaces by relatively high voltage pulses
Abstract
Description
【発明の詳細な説明】
発明の属する分野
この発明は接点信号発生回路に関するものである。計ｓ
機を用いてプラントの制御等を行う場合、プラントの各
種接点の状態（オンであるかオフであるかという状態）
を論理［ＯＪ 、 ｒｌＪのテイジクル信号に変（東し
て計算機に入力するための回路として接点信号発生回路
が用いられている。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a contact signal generation circuit. Total s
When controlling a plant using a machine, the status of various contacts in the plant (whether they are on or off)
A contact signal generation circuit is used as a circuit for converting the logic [OJ, rlJ into logic signals and inputting them into a computer.
従来技術 従来、この種の回路として第１図に示すものがあった。Conventional technology Conventionally, there has been a circuit of this type as shown in FIG.
図においてＫｃは状態信号発生の対象となる接点、ｖｃ
は電圧源、Ｒｉは１枕流制限抵抗、ＰＣはホトカプラ（
ｐｈｏｔｏ ｃｏｕｐｌｅｒ） 、Ｒｏはプルアップ抵
抗、ｖｏは電圧源であり、（１）はホトカプラの発光ダ
イオード、（２）はホトトランジスタ（ｐｈｏｔｏ ｔ
ｒａｎ−ｓｉｓｔｏｒ ）、（３）は出力端子である。In the figure, Kc is the contact point that generates the status signal, and vc
is a voltage source, Ri is a current limiting resistor, and PC is a photocoupler (
(photo coupler), Ro is a pull-up resistor, vo is a voltage source, (1) is a photocoupler light emitting diode, (2) is a phototransistor (photo
ran-sister), (3) is an output terminal.
接点Ｋｃがオフのときは発光ダイオード（１）が発光せ
ず、ホトトランジスタ（２）に電流が流れず、出力端子
（３）の電圧は高電圧レベルにあり、論理「１」の信号
を出力する。When the contact Kc is off, the light emitting diode (1) does not emit light, no current flows through the phototransistor (2), and the voltage at the output terminal (3) is at a high voltage level, outputting a logic "1" signal. do.
接点Ｋｃがオンのときは発光ダイオード（１）が発光し
、ホトトランジスタ（２）に電流が流れて、出力端子（
３）の電圧は低電圧レベルとなり、論理「０」の信号を
出力する。When the contact Kc is on, the light emitting diode (1) emits light, current flows through the phototransistor (2), and the output terminal (
The voltage of 3) becomes a low voltage level and outputs a logic "0" signal.
ところで、接点Ｋ。の酸化を防ぐためＶｃの電圧を２４
Ｖ〜２８Ｖ程度に比較的高くし接点Ｋ。のオンオフ動作
の時に微小な放電を発生させている。接点Ｋｃがオン状
態にある間の消費電力Ｗは電圧源ｖ０の電圧値をＶＣと
し発光ダイオード（１）の電流を工！とすればＷ−Ｖｃ
ＸＩ、で表わされ、このような接点が多数存在するとき
は、消費電力が大きくなり、それに伴う発熱が大きくな
るという欠点があった。By the way, contact point K. In order to prevent oxidation of
V to 28V, which is relatively high, and contact K. A small discharge is generated during the on/off operation. The power consumption W while the contact Kc is in the on state is calculated by calculating the current of the light emitting diode (1) with the voltage value of the voltage source v0 as VC. Then W-Vc
XI, and when a large number of such contacts are present, there is a drawback that power consumption increases and heat generation accordingly increases.
発明の目的
この発明は従来の回路における上記のような欠点を除去
するためになされたもので、オフからオンへの過渡時点
においては接点の微小放電が可能な程度のｒｉ圧が接点
Ｃ二加えられ、接点のオン状態の時は電源の電圧か低下
して消費電力を低減することのできる接点信号発生回路
を提供することを目的としている。Purpose of the Invention The present invention has been made to eliminate the above-mentioned drawbacks in conventional circuits, and at the time of transition from OFF to ON, RI pressure is applied to contact C2 to the extent that a small discharge can occur at the contact. It is an object of the present invention to provide a contact signal generating circuit which can reduce power consumption by lowering the voltage of a power supply when the contact is in an on state.
発明の構成
上述の目的を達成するため、この発明では接点のオフ状
態においては才１の電圧値まで充電されたコンデンサの
電圧が接点Ｃ二印加され、接点がオン状態を継続してい
る間は上記３・１の電圧値よりも低い才２の電圧値を有
する電源から抵抗を介し 、て接点に電流が流される
回路とし、この場合、矛１の電圧値までコンデンサを充
電するコンデンサ充電回路には高抵抗が挿入されている
ため、このコンデンサ充電回路から接点に流れる電源は
充分Ｉ：小さくなるようにしたものであって、以下図面
につい°にの発明の詳細な説明する。Structure of the Invention In order to achieve the above-mentioned object, in this invention, when the contact is in the OFF state, the voltage of the capacitor charged to the voltage value C1 is applied to the contact C2, and while the contact continues to be in the ON state, A circuit in which a current is passed through a resistor from a power supply having a voltage value of 2, which is lower than the voltage value of 3.1 above, to the contact, and in this case, a capacitor charging circuit that charges a capacitor to a voltage value of 1. Since a high resistance is inserted in the capacitor charging circuit, the power flowing from the capacitor charging circuit to the contacts is made sufficiently small.The invention will be described below in detail with reference to the drawings.
発明の実施例
矛２図はこの発明の一実施例を示す接続図で、３・２図
において矛１図と同−杓号は同−又は相当部分を示し、
Ｒ９は放電抵抗、Ｃ９，はコンデンサ、ｖｃは矛１の電
源、Ｒｃ、は才１の抵抗、Ｄｃ、は逆流阻止のための水
１のダイオードで、ｖｄは〕・２の電源、Ｒｄ＋は第２
の抵抗、Ｄｄ、は逆流阻止のための矛２のダイオードで
ある。Embodiment of the invention Figure 2 is a connection diagram showing an embodiment of this invention, and in Figures 3 and 2, the same numbers as in Figure 1 indicate the same or equivalent parts,
R9 is a discharging resistor, C9 is a capacitor, vc is a power source, Rc is a resistor, Dc is a diode for water to prevent reverse flow, vd is a power source for ]・2, and Rd+ is a power source for 2
The resistance, Dd, is a diode for backflow prevention.
この明細書ではＫｃｓ ＲＰ、ＣＩ）Ｉ の直列回路
をコンデンサ放電回路と称し、ｖｃｌＲｃｌ、ＤＣ，の
直列接続で構成され、コンデンサＣ１，に並列（：接続
されている回路をコンデンサの充電回路と称し、ｖｄｌ
ＲｄいＤｄ＋ の直列接続で構成されコンデンサＣ９
゜に並列じ接続されている回路を信号電流回路と称し、
この信号電流回路Ｃ二は電流検出のためホトカブラＰＣ
が挿入されている。またｖｉ、は接点Ｋｃの接点間電圧
を示す。才２の電源Ｖｄの電圧は第１の電源ｖｃの電圧
より低く設定される。In this specification, the series circuit of Kcs RP, CI) I is called a capacitor discharging circuit, and the circuit consisting of the series connection of vclRcl, DC, and connected in parallel to the capacitor C1, is called a capacitor charging circuit. ,vdl
It consists of a series connection of Rd and Dd+, and a capacitor C9
The circuit connected in parallel to ゜ is called the signal current circuit,
This signal current circuit C2 is a photocoupler PC for current detection.
is inserted. Further, vi indicates the voltage between the contacts Kc. The voltage of the second power supply Vd is set lower than the voltage of the first power supply VC.
第３図は矛２図の各部の動作を示す動作タイムチャート
で、矛３図（ａｔは接点Ｋｃのオンオフを、同図（ｂ）
はｖｉ、を、同図（ｅ）は出力端子（３）の出力を示す
。Figure 3 is an operation time chart showing the operation of each part of Figure 2.
(e) shows the output of the output terminal (3).
接点ＫｃがオフのときはコンデンサＣ９，はＶ。まで充
電されている。電源ｖｃからもｖｄからも電流は流れな
い。したがって出力端子（３）からは論理「ｌ」の信号
が出力される。接点Ｋｃをオフからオンにするとｖｉ、
は■。から０じなり、第２図のＶ。When contact Kc is off, capacitor C9 is at V. is charged up to. No current flows from the power supply VC or VD. Therefore, a logic "L" signal is output from the output terminal (3). When contact Kc is turned on from off, vi,
■. 0 minutes from V in Figure 2.
と第１図の■。とを同一電圧にしておけば、第１図の場
合微弱な火花が出るとすれば、矛２図の場合も微弱な火
花が出る。しかし、コンデンサＣ９，はすみやかに放電
され、かつ矛１の抵抗Ｒ０，を高抵抗にしておけば、ｖ
ｃから接点Ｋｃへ流れる電流は微小Ｃなるが、Ｖｄ −
＋ ＰＣ−＋ Ｒｄ、→Ｄｄ、→Ｒｐ−＋Ｋｃの電流は
Ｖｄが低いけれどもＲｄ＋も低い抵抗値を有するため発
光ダイオード（１）が充分Ｃ二発光できる電流値であり
、出力端子（３）からは論理「０」の信号が出力される
。and ■ in Figure 1. If both are set to the same voltage, if a weak spark is produced in the case of Fig. 1, a weak spark will also be produced in the case of Fig. 2. However, if the capacitor C9 is quickly discharged and the resistor R0 of spear 1 is set to a high resistance, then v
The current flowing from c to contact Kc is minute C, but Vd −
+ PC-+ The current of Rd, →Dd, →Rp-+Kc is a current value that allows the light-emitting diode (1) to emit sufficient C2 light, because although Vd is low, Rd+ also has a low resistance value, and the current value is such that the light emitting diode (1) can emit enough C2 light, A signal of logic "0" is output.
タトえばＶ。−４８Ｖ 、 ｖｄ−１２Ｖ、ホトダイオ
ードｍの電流を０．０１Ａ （Ｒｉ −４，８にΩ、Ｒ
ｄ、 −１，２にΩ）、Ｒｏ、 ｓ−４３ＫΩとすれば
、才１図の場合、１個の接点に対する消費型、力は４８
ｘ Ｏ，０１−０，４８Ｗとなるが、矛２図の場合、
１個の接点（二対する消費電力は
１２ ｘ ０００１ ＋ ４８ ｘ Ｏ，００１−（Ｌ
１６８Ｗとなり約％に低減される。Tato is V. -48V, vd-12V, photodiode m current 0.01A (Ri -4,8 Ω, R
d, -1,2 Ω), Ro, s - 43KΩ, then in the case of Figure 1, the consumption type force for one contact is 48
x O,01-0,48W, but in the case of the spear 2 figure,
The power consumption for one contact (two contacts is 12 x 0001 + 48 x O,001-(L
It becomes 168W, which is reduced to about %.
ａｔ二、接点ＫｃがオンからオフＣ二なるときコンデン
サＣｐ、はｖｄ→発光ダイオード（１）→ｌ匂、→Ｄｄ
＋→Ｃ２，の回路で充電されＣｐ＋Ｒｄ＋ によって定
められる時定数は小さいのでＣ１，の電圧（すなわち接
点Ｋｃ°オンオフ態におけるＶｉ 、 ）はすみやかＣ
二はｔＹＶｄに等しい電圧に達し、その後はＶ。−＋Ｒ
ｃ、→Ｄｃ、→Ｃの回路で充電されるがＣｐ、Ｒｃ、に
よって定め１
られる時定数は大きく設定しであるので電圧ｖｉ。At2, when the contact Kc changes from on to off C2, the capacitor Cp is vd → light emitting diode (1) → l odor, → Dd
+→C2, and the time constant determined by Cp+Rd+ is small, so the voltage of C1 (i.e., Vi in the on/off state of contact Kc°) quickly changes to C
2 reaches a voltage equal to tYVd and then V. -+R
It is charged by the circuits c, →Dc, and →C, but the time constant determined by Cp and Rc is set large, so the voltage vi.
はＶｄからｖｏまでは保々（二上昇して木３図（Ｃ）に
示す立上り波形となる。したがってｖｉ、がｖｃに近い
電圧（二なる時点ではｌ要点Ｋ。の接触点間距離は充分
（二大きくなっていて火花放電は起らない。increases steadily from Vd to vo, resulting in the rising waveform shown in Figure 3 (C).Therefore, when vi becomes a voltage close to vc (at 2 points, the distance between the contact points is sufficient ( 2, so that no spark discharge occurs.
しかし、接点Ｋｃがオフ状態に保たれていると■ｉ、が
ほぼＶ。Ｃ二等しくなっており、このときオフからオン
状態になる過程においてｖｌ、が■。に保たれたまま接
触点間距離が段々小さくなってゆくので畝弱な火花放ｌ
が発生し接点Ｋ。の酸化を防上する。However, if contact Kc is kept in the off state, ■i is approximately V. C2 becomes equal, and at this time, in the process of changing from off to on state, vl becomes ■. As the distance between the contact points gradually decreases while maintaining
occurs at contact K. Prevents oxidation.
また、接点Ｋ。がオフからオンとなってコンデンサＣｐ
＋ 〕電圧がＶｄ ｊ ＩＪ下ると、Ｖｄ−＋ＰＣ−
Ｒｄ＋ −＋Ｄｄ＋に電流が流れて発光ダイオード（１
）が発光し、接点■（。がオンからオフとなって電圧ｖ
ｉ、がＶｄを越すとＶｄ−＋ｐｃ−＋ Ｒｄ、→Ｄｄ＋
の電流が流れず発光ダイオード（１）の発光が停止する
ので、出力端子（３）の出力は第３図（Ｃ）（二示すと
おりになる。Also, contact point K. changes from off to on and capacitor Cp
+] When the voltage drops by Vd j IJ, Vd-+PC-
Current flows through Rd+ −+Dd+ and the light emitting diode (1
) emits light, the contact ■ (. changes from on to off, and the voltage v
When i exceeds Vd, Vd-+pc-+ Rd, → Dd+
Since no current flows and the light emitting diode (1) stops emitting light, the output from the output terminal (3) becomes as shown in FIG. 3(C) (2).
士２図の回路ではｖｄ１Ｒｄ５、Ｄｄ、の直列接続で構
成する信号電流回路の電流を検出する電流検出回路とし
て、ｖｄとＲｄ＋どの間に直列にホトカプラｐｃを挿入
したが、ｖｄ１Ｒｄ５、Ｄｄ、の直列回路に流れる電流
を検出する為の電流検出回路としては他のどのような回
路を用いてもよい。In the circuit shown in Figure 2, a photocoupler PC is inserted in series between vd and Rd+ as a current detection circuit that detects the current of the signal current circuit configured by series connection of vd1Rd5, Dd. Any other circuit may be used as the current detection circuit for detecting the current flowing through the circuit.
本発明の効果
以上のようにこの発明によれば、コンデンサを高い電圧
まで充電してこの充電電圧を接点（二印加し、接点がオ
ン状態（二ある間は接点には低い電圧の電源からの電流
が流され、コンデンサを充電する為の高い電圧の電源は
高抵抗を経て接点に接続されるようにしたので、接点が
オフからオンへ移る過渡状態では接点（二微小な火花放
電を発生して接点の臥化を防ぐことができ、かつ接点の
オン状態における消費電力の小さい接点信号発生回路を
得ることができる。Effects of the Invention As described above, according to the present invention, a capacitor is charged to a high voltage, this charging voltage is applied to the contact, and while the contact is in the on state, the contact is not connected to the low voltage power source. The high-voltage power supply for charging the capacitor is connected to the contact through a high resistance, so in the transient state where the contact changes from off to on, the contact (which generates a small spark discharge) Accordingly, it is possible to obtain a contact signal generating circuit which can prevent the contact from lying down and which consumes less power when the contact is in the on state.
【図面の簡単な説明】
３１１図は従来の回路を示す接続図、１・２図はこの発
明の一実施例を示す接続図、才３図は矛２図の各部の動
作を示す動作タイムチャートである。
Ｋｃ・・・接点、Ｒ１・・・放電抵抗、ｃ９．・・・コ
ンデンサ、Ｖｏ・・・才１の電源、Ｖｄ・・・矛２の電
源、Ｒｅｌ・・・才１の抵抗、Ｒｄ＋・・・、（−２の
抵抗、Ｄｃ、・・・、？１のダイオード、Ｄｄ、・・・
才２のダイオード、ｃｃ・・・結合微分回路、ＰＣ・・
・ ホトカプラ（電流検出回路）。
なお、各図中同一符号は同−又は相当部分を示すＯ
代理人 葛 野 信 −
第１図
特許庁長官殿
１．事件の表示 ↑、１′願昭５７−１６８７８
４号２、発明の名称
接点信号発生回路
３、補止をする各
代表者片山仁へ部
５、補正の対象
（１）明細書の発明の詳細な説明の欄
６、補正の内容
（１）明制御書第３頁第５行目ｒ２４Ｖ−２８ＶＪとあ
るを「２４■〜４８ｖ」と訂正する。
以上[Brief Description of the Drawings] Figure 311 is a connection diagram showing a conventional circuit, Figures 1 and 2 are connection diagrams showing an embodiment of the present invention, and Figure 3 is an operation time chart showing the operation of each part of Figure 2. It is. Kc... contact, R1... discharge resistance, c9. ...Capacitor, Vo...Power source 1, Vd...Power source 2, Rel...Resistance 1, Rd+..., (-2 resistance, Dc,...,? 1 diode, Dd,...
Diode, cc...coupled differential circuit, PC...
- Photocoupler (current detection circuit). In addition, the same reference numerals in each figure indicate the same or equivalent parts. Incident display ↑, 1' Gansho 57-16878
No. 4 No. 2, Name of the invention Contact signal generation circuit 3, To each representative making the amendment Hitoshi Katayama Section 5, Subject of amendment (1) Column 6 for detailed explanation of the invention in the specification, Contents of amendment (1) In the 5th line of page 3 of the light control document, the text ``r24V-28VJ'' is corrected to ``24 - 48v''. that's all
Claims (1)
デンサ放電回路と、第１の屯のと矛１の抵抗と逆流阻止
のための第１のダイオードとを直列接続し、この直列接
続を上記コンデンサに並列（二接続して構成したコンデ
ンサ充電回路と、上記、ｆｌ−１の電源よりも電圧の低
い才２の電源と翠２の抵抗と逆流阻止のための３・２の
ダイオードとを直列接続しこの直列接続を上記コンテン
サＣ二並列に接続して構成した信号電流回路と、この信
号電流回路の電流の有無によって論理１ｏｊ、Ｉ−１，
Ｊの２値化号を発生する電流検出回路とを備えた接点信
号発生回路。A capacitor discharge circuit in which a contact point, an eccentric resistor, and a capacitor are connected in series, a resistor of the first tombstone 1 and a first diode for blocking reverse current are connected in series, and this series connection is connected to the capacitor. A capacitor charging circuit constructed by connecting two in parallel, and a power supply of Sai2 whose voltage is lower than the power supply of fl-1, a resistor of Midori2, and a diode of 3.2 for blocking reverse current are connected in series. A signal current circuit is constructed by connecting the two capacitors C in parallel with this series connection, and logic 1oj, I-1,
A contact signal generation circuit comprising a current detection circuit that generates a binary signal of J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16878482A JPS5958916A (en) | 1982-09-28 | 1982-09-28 | Contact signal generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16878482A JPS5958916A (en) | 1982-09-28 | 1982-09-28 | Contact signal generating circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5958916A true JPS5958916A (en) | 1984-04-04 |
| JPH0349168B2 JPH0349168B2 (en) | 1991-07-26 |
Family
ID=15874401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16878482A Granted JPS5958916A (en) | 1982-09-28 | 1982-09-28 | Contact signal generating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656639A1 (en) * | 1993-12-01 | 1995-06-07 | ABB Management AG | Digital input for detection station |
| JP2008298524A (en) * | 2007-05-30 | 2008-12-11 | Denso Corp | Circuit testing device and its operation method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556417U (en) * | 1978-06-27 | 1980-01-17 |
-
1982
- 1982-09-28 JP JP16878482A patent/JPS5958916A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556417U (en) * | 1978-06-27 | 1980-01-17 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0656639A1 (en) * | 1993-12-01 | 1995-06-07 | ABB Management AG | Digital input for detection station |
| US5606279A (en) * | 1993-12-01 | 1997-02-25 | Abb Management Ag | Apparatus for producing a digital input to a recording station |
| JP2008298524A (en) * | 2007-05-30 | 2008-12-11 | Denso Corp | Circuit testing device and its operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0349168B2 (en) | 1991-07-26 |
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