JPS5834625A - Multiple output type contactless switch - Google Patents
Multiple output type contactless switchInfo
- Publication number
- JPS5834625A JPS5834625A JP13308381A JP13308381A JPS5834625A JP S5834625 A JPS5834625 A JP S5834625A JP 13308381 A JP13308381 A JP 13308381A JP 13308381 A JP13308381 A JP 13308381A JP S5834625 A JPS5834625 A JP S5834625A
- Authority
- JP
- Japan
- Prior art keywords
- output
- comparators
- target
- coil
- circuit
- 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
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
- H03K17/945—Proximity switches
- H03K17/95—Proximity switches using a magnetic detector
- H03K17/952—Proximity switches using a magnetic detector using inductive coils
- H03K17/9525—Proximity switches using a magnetic detector using inductive coils controlled by an oscillatory signal
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Electronic Switches (AREA)
Abstract
Description
【発明の詳細な説明】 この発明はマルチプル出力形無接点スイッチに関する。[Detailed description of the invention] The present invention relates to a multiple output type non-contact switch.
従来の無接点スイッチはこれが近接スイッチのげあい第
１図に示すように発振振幅差動出力、ブリッジ出力等が
ある設定値を通過する事に工す出力がオンまたはオフす
る。In the conventional non-contact switch, as shown in FIG. 1, the output of the conventional non-contact switch is turned on or off when the oscillation amplitude differential output, bridge output, etc. pass a certain set value.
最近ユーザーより動作距離に応じて出力が変化する近接
の要求が高まっている。ところが、これらの高周波発振
形、ＩＩ励動形ブリッジ形等では、ターゲットとセンサ
ーの距離が増大すると出力は指数関数的に減少する。こ
れを解消するために、検出コイルのインピーダンス変化
に応じてアンプの増装置を変化するようにコイルの出力
を帰還させる方法や、対数増幅回路を通すこと（二より
リニアーな出力を得ていた。しかし、これらは周囲温度
の変化やアンプのゲイン変化のために動作が不安定であ
り、これを安定化するために非常に高価なアンプを使う
必要がある。Recently, there has been an increasing demand from users for proximity devices whose output changes depending on the operating distance. However, in these high frequency oscillation type, II excitation type bridge type, etc., the output decreases exponentially as the distance between the target and the sensor increases. To solve this problem, there were methods to feed back the output of the coil so that the amplifier amplifier was changed according to changes in the impedance of the detection coil, and to pass it through a logarithmic amplification circuit (obtaining a more linear output). However, these devices are unstable due to changes in ambient temperature and amplifier gain, and require the use of very expensive amplifiers to stabilize them.
そこで、この発明は安価で容易にスイッチとターゲット
間の距離に応じた出力を得られるようにしようとするも
ので、以下図によってこの発明の実施例について説明す
る。Therefore, the present invention aims to make it possible to easily obtain an output according to the distance between the switch and the target at a low cost.Examples of the present invention will be described below with reference to the drawings.
すなわち第２図は差動形近接スイッチを示すもので符号
１はターゲット、２はセンスコイル、３は基準コイル、
４は発振コイル、５は発振回路、６は差動増幅器、７は
検波および積分回路、Ｒ１−Ｒ１３は抵抗、Ｑ１〜Ｑ１
２はコンパレーター、０１〜０１２ｔｉ各コンパレータ
ーの出力端、０は共振コンデンサである。そして発振コ
イル４と共振コンデンサ０に工って構成される共振回路
はＱ１％を回路５によって駆動される。センスコイル２
けターゲットの接近お工び離間を検出するもので差動増
幅器６の一方の入力端に接続される。基準コイル３けセ
ンスコイル２および発振コイル４と磁気結合され、かつ
差動増幅器６０佃方の入力端にＷ、綬される。差動増幅
器６の出力端は検波および積分回路の入力端に接続され
、この回路の出力端はコンパレーターＱ１〜Ｑ１２の一
方の入力端に接続される。一方各コｙバレーターの他方
の入力端間にはそれぞれ抵抗８１〜Ｒ１２が接続され、
さらにこれらの抵抗群はその一端が抵抗Ｒ１３を介して
電源Ｖｃｃに、またその他端がアース側Ｅにそれぞれ接
続される。That is, Fig. 2 shows a differential proximity switch, where 1 is a target, 2 is a sense coil, 3 is a reference coil,
4 is an oscillation coil, 5 is an oscillation circuit, 6 is a differential amplifier, 7 is a detection and integration circuit, R1-R13 are resistors, Q1 to Q1
2 is a comparator, 01 to 012ti are output terminals of each comparator, and 0 is a resonant capacitor. The resonant circuit constructed by the oscillation coil 4 and the resonant capacitor 0 is driven by the circuit 5 with Q1%. sense coil 2
It detects the approach and separation of the target and is connected to one input terminal of the differential amplifier 6. The three reference coils are magnetically coupled to the sense coil 2 and the oscillation coil 4, and are connected to the input terminal of the differential amplifier 60. The output terminal of the differential amplifier 6 is connected to the input terminal of a detection and integration circuit, and the output terminal of this circuit is connected to one input terminal of the comparators Q1 to Q12. On the other hand, resistors 81 to R12 are connected between the other input terminals of each cobalator, respectively.
Furthermore, one end of these resistor groups is connected to the power supply Vcc via a resistor R13, and the other end is connected to the ground side E.
第３（２）は第２図に示す差動形近接スイッチの増幅器
出力に対する動作距離すなわちターゲット１とセンスコ
イル２間の距離における動作特性を示すもので、この図
から分るよう１：増幅器６の出力は動作距離に応じて対
数的に変化している。Part 3 (2) shows the operating characteristics of the differential proximity switch shown in Fig. 2 at the operating distance with respect to the amplifier output, that is, the distance between the target 1 and the sense coil 2. As can be seen from this figure, 1: Amplifier 6 The output varies logarithmically with the operating distance.
今、ここで、たとえば分解能が１ ｍ ｍの近接スイッ
チを考えてみる。そして第３１１！！ｇに示す増幅器の
出力を動作距離１ｍｍ毎に区切り、それぞれの点を１〜
Ｉとする０次にコンパレーターＱ１〜Ｑ１２の各基準電
圧を決め、抵抗ａｉ−８１２を上記各点１〜１に応じて
設定する。Now, let us consider, for example, a proximity switch with a resolution of 1 mm. And the 311th! ! The output of the amplifier shown in g is divided into operating distances of 1 mm, and each point is
Each reference voltage of the zero-order comparators Q1 to Q12 is determined as I, and the resistor ai-812 is set according to each of the above points 1 to 1.
この状態でターゲット１がセンスコイル２に近づき、九
とえばその距離が１２ｍ５ａＯ点になると、増幅器６の
出力は点鳳となり、コンパレーターＱ１はオンとなり、
したがってその出力０１もオンとなる。以下ターゲット
１の接近に伴ってコンパレーターＱ２〜Ｑ１２が順次オ
ンしていく。In this state, when the target 1 approaches the sense coil 2 and the distance reaches a point of, for example, 12m5aO, the output of the amplifier 6 becomes a point, and the comparator Q1 turns on.
Therefore, its output 01 is also turned on. Thereafter, as the target 1 approaches, the comparators Q2 to Q12 are sequentially turned on.
第２−においてはコンパレーターＱｌ−Ｑｌ、２の各々
の出力を直接オンおＬびオフするものについて説明した
が、これは第４図に示すように各コンパレーターの出力
端に抵抗Ｒ２１〜Ｒ３２を接続し、これに工って電流出
力形とすることも可能である。In Part 2-, we explained the system that directly turns on and off the outputs of the comparators Ql-Ql, 2, but this requires resistors R21 to R3 to be connected to the output terminals of each comparator as shown in Figure 4. It is also possible to connect this and create a current output type.
を九上記実施例においては近接スイッチについて説明し
たが、これは近接スイッチに限定されることなく、たと
えば光電スイッチやコンデンサスイッチ等でも同様に適
用される。(9) In the above embodiment, a proximity switch has been described, but this is not limited to a proximity switch, and can similarly be applied to, for example, a photoelectric switch, a capacitor switch, etc.
この発明は上述のようにスイッチの増幅器の後段Ｃ二そ
れぞれ設定値の興なる複数個のフンノくレータ−１−設
ケ、これらのコンパレーターの出力を動作距ＩＩＩに応
じて順次オンまたはオフさせるようにしているので、そ
の出力をリニアに得ることができ、かつターゲットまで
の距離を正確に知ることができる。As described above, the present invention includes a plurality of comparators each having a set value after the amplifier of the switch, and the outputs of these comparators are sequentially turned on or off according to the operating distance III. Therefore, the output can be obtained linearly and the distance to the target can be accurately determined.
第１−社従来の近接スイッチの動作特性を示す図、９２
図はこの発明書：おける一実施例を示す回路図、第３図
は第２図における動作特性図、第４図はこの発明の他の
実施例を示す回路図である。
１・・・ターゲット、２・・・センスコイル、３・・・
基準コイル、４・・・発振コイル、５・・・発振回ｗ！
１．６・・・増幅器、７・・・検波および積分回路、Ｒ
１−Ｒ１３・・・抵抗、Ｑ１〜Ｑ１２・・・コンパレー
ター、Ｒ２１〜Ｒ３３・・・抵抗、Ｅ・・・アース端子
。
ｆｉｌ 図
→ターゲット−亡フサＦａｊ錐Diagram showing the operating characteristics of the conventional proximity switch of Company 1, 92
FIG. 3 is a circuit diagram showing one embodiment of this invention, FIG. 3 is an operating characteristic diagram in FIG. 2, and FIG. 4 is a circuit diagram showing another embodiment of the invention. 1...Target, 2...Sense coil, 3...
Reference coil, 4...Oscillation coil, 5...Oscillation times lol!
1.6...Amplifier, 7...Detection and integration circuit, R
1-R13...Resistor, Q1-Q12...Comparator, R21-R33...Resistor, E...Earth terminal. fil Diagram→Target-Faj Faj Cone
Claims (1)
個のコンパレーターを設け、これらのコンパレーターの
出力を動作距離に応じて順次オンまたはオフさせるよう
にしたマルチプル出力形無接点スイッチ。A multiple output non-contact switch in which multiple comparators, each with a set value, are installed after the amplifier of the switch, and the outputs of these comparators are turned on or off in sequence according to the operating distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13308381A JPS5834625A (en) | 1981-08-25 | 1981-08-25 | Multiple output type contactless switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13308381A JPS5834625A (en) | 1981-08-25 | 1981-08-25 | Multiple output type contactless switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5834625A true JPS5834625A (en) | 1983-03-01 |
Family
ID=15096446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13308381A Pending JPS5834625A (en) | 1981-08-25 | 1981-08-25 | Multiple output type contactless switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834625A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147331U (en) * | 1983-03-19 | 1984-10-02 | 和泉電気株式会社 | Multi-stage setting output type proximity switch |
| EP0304272A2 (en) * | 1987-08-17 | 1989-02-22 | Sigma Limited | Inductive proximity sensor |
| JPH021926U (en) * | 1988-06-16 | 1990-01-09 | ||
| EP2493076A1 (en) * | 2011-02-22 | 2012-08-29 | Rockwell Automation Technologies, Inc. | Inductive proximity sensor |
-
1981
- 1981-08-25 JP JP13308381A patent/JPS5834625A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147331U (en) * | 1983-03-19 | 1984-10-02 | 和泉電気株式会社 | Multi-stage setting output type proximity switch |
| EP0304272A2 (en) * | 1987-08-17 | 1989-02-22 | Sigma Limited | Inductive proximity sensor |
| EP0304272A3 (en) * | 1987-08-17 | 1990-11-22 | Sigma Limited | Inductive proximity sensor |
| JPH021926U (en) * | 1988-06-16 | 1990-01-09 | ||
| EP2493076A1 (en) * | 2011-02-22 | 2012-08-29 | Rockwell Automation Technologies, Inc. | Inductive proximity sensor |
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