DE102015218340B4 - Inductive proximity switch with a pre-damping element - Google Patents
Inductive proximity switch with a pre-damping element Download PDFInfo
- Publication number
- DE102015218340B4 DE102015218340B4 DE102015218340.8A DE102015218340A DE102015218340B4 DE 102015218340 B4 DE102015218340 B4 DE 102015218340B4 DE 102015218340 A DE102015218340 A DE 102015218340A DE 102015218340 B4 DE102015218340 B4 DE 102015218340B4
- Authority
- DE
- Germany
- Prior art keywords
- damping element
- proximity switch
- inductive proximity
- circuit board
- sensor coil
- 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.)
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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
- H03K17/953—Proximity switches using a magnetic detector using inductive coils forming part of an oscillator
- H03K17/9532—Proximity switches using a magnetic detector using inductive coils forming part of an oscillator with variable frequency
-
- 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
- H03K17/9505—Constructional details
-
- 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
- H03K2017/9527—Details of coils in the emitter or receiver; Magnetic detector comprising emitting and receiving coils
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/945—Proximity switches
- H03K2217/95—Proximity switches using a magnetic detector
Landscapes
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Electronic Switches (AREA)
Abstract
Induktiver Näherungsschalter mit mindestens einer Sensorspule (1) zur Erzeugung eines magnetischen Wechselfeldes zum Nachweis eines leitfähigen Targets in einem Überwachungsbereich und mit einem Vorbedämpfungselement (2), die gemeinsam auf einer Leiterplatte (3) angeordnet sind, mit einer Oszillatorschaltung (4) zur Speisung der Sensorspule (1) und einer Auswerteschaltung (5) zur Erzeugung eines binären Schaltsignals, wobei das Vorbedämpfungselement (2) einen Ring aufweist, der an mindestens einer Stelle unterbrochen ist und einen Anschluss zur Abstimmung seiner Impedanz besitzt, wobei das Vorbedämpfungselement (2) mit der Auswerteschaltung (5) verbunden ist.Inductive proximity switch having at least one sensor coil (1) for generating an alternating magnetic field for detecting a conductive target in a monitoring area and with a Vorbedämpfungselement (2), which are arranged together on a printed circuit board (3), with an oscillator circuit (4) for feeding the Sensor coil (1) and an evaluation circuit (5) for generating a binary switching signal, wherein the pre-damping element (2) has a ring which is interrupted at at least one point and has a connection for tuning its impedance, wherein the pre-damping element (2) with the Evaluation circuit (5) is connected.
Description
Die Erfindung betrifft einen berührungslos arbeitenden induktiven Näherungsschalter mit einem Vorbedämpfungselement gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a non-contact inductive proximity switch with a pre-damping element according to the preamble of
Berührungslos arbeitende Näherungsschalter werden als elektronische Schaltgeräte vor allem in der Automatisierungstechnik eingesetzt. Sie sind seit langem bekannt und werden u. a. auch von der Anmelderin hergestellt und vertrieben.Non-contact proximity switches are used as electronic switching devices, especially in automation technology. They have long been known and u. a. also produced and sold by the applicant.
Induktive Näherungsschalter detektieren ein elektrisch leitfähiges, vorzugsweise metallisches Target in einem Überwachungsbereich. Sie weisen mindestens eine Sensorspule auf und können mit Stromimpulsen oder mit kontinuierlichem, meist sinusförmigem Wechselstrom betrieben werden. Dabei kann die Spule Bestandteil eines Oszillators sein und dessen Frequenz bestimmen. Die Sendespule kann aber auch von einem Generator mit pulsförmigem oder sinusförmigem Strom versorgt werden. Der Sensor kann auch als Transformator, z. B. als Differentialtransformator aufgebaut sein und somit weitere Sende- oder Empfangsspulen aufweisen.Inductive proximity switches detect an electrically conductive, preferably metallic target in a monitoring area. They have at least one sensor coil and can be operated with current pulses or with continuous, usually sinusoidal alternating current. The coil can be part of an oscillator and determine its frequency. The transmitter coil can also be powered by a generator with pulsed or sinusoidal current. The sensor can also be used as a transformer, z. B. be constructed as a differential transformer and thus have more transmitting or receiving coils.
Ausgewertet wird die Bedämpfung, d. h. die Änderung der Induktivität und/oder die Impedanz einer Spule, bzw. der Koppelfaktor zwischen zwei oder mehreren Spulen. Eine Steuereinheit erzeugt bei Erreichen oder Unterschreiten eines Schwellwertes ein vorzugsweise binäres Schaltsignal.The attenuation is evaluated, ie. H. the change of the inductance and / or the impedance of a coil, or the coupling factor between two or more coils. A control unit generates upon reaching or falling below a threshold, a preferably binary switching signal.
Um die Herstellung effizienter zu gestalten, werden Sensorspulen als Planarspulen, d. h. als Leiterbahnen in der hinlänglich bekannten Leiterplattentechnik ausgeführt.To make manufacturing more efficient, sensor coils are used as planar coils, i. H. designed as printed conductors in the well-known printed circuit board technology.
Die
Die
Nachteilig ist dass die Abschirmelemente auch dann wirken, wenn sie eigentlich nicht gebraucht werden, z. B. bei nicht bündiger Einbaulage, wo sie den Schaltabstand unnötig verringern.The disadvantage is that the shielding also act when they are not actually needed, for. B. in non-flush mounting position, where they reduce the switching distance unnecessary.
Die
Als nachteilig wird angesehen, dass der Widerstand nur einmalig während der Fertigung bei geöffnetem Gerät abgestimmt werden kann, was außerdem die Gefahr der Verschmutzung beim Abtragen von Widerstandsmaterial birgt.A disadvantage is considered that the resistor can be tuned only once during production with the device open, which also carries the risk of contamination when removing resistance material.
Die Aufgabe der Erfindung besteht darin, einen induktiven Näherungsschalter anzugeben, der die o. g. Nachteile nicht aufweist, kostengünstig herstellbar ist und gleichermaßen bündig wie nicht bündig einbaubar ist. Wobei bündig bedeutet, dass er bis zu seiner aktiven Fläche in Metall einbaubar ist, und nicht bündig, dass er im Bereich seiner aktiven Fläche nicht durch eine metallische Umgebung bedämpft werden darf.The object of the invention is to provide an inductive proximity switch, the o. G. Disadvantages does not have, is inexpensive to produce and equally flush as not flush mountable. Being flush means that it can be installed in metal up to its active surface, and not flush, that it must not be damped in the area of its active surface by a metallic environment.
Diese Aufgabe wird mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst. Die Unteransprüche betreffen die vorteilhafte Ausgestaltung der Erfindung.This object is achieved with the characterizing features of
Der wesentliche Erfindungsgedanke besteht darin, an Stelle des bekannten Abschirmelements ein aus mindestens einer ringförmigen Struktur bestehendes, abstimmbares Vorbedämpfungselement zu verwenden, das zur Kompensation einer metallische Frontfläche oder einer elektrisch leitenden Einbauumgebung dient. Um eine Abstimmung zu ermöglichen, ist die Ringstruktur an mindestens einer Stelle unterbrochen und elektrisch mit einem vorzugsweise variablen Abstimmwiderstand verbunden, wobei aber auch ein Festwiderstand getaktet zugeschaltet werden kann.The essential idea of the invention consists in using, instead of the known shielding element, a tunable pre-damping element which consists of at least one annular structure and which serves to compensate for a metallic front surface or an electrically conductive installation environment. In order to allow a vote, the ring structure is interrupted at least one point and electrically connected to a preferably variable Abstimmwiderstand, but also a fixed resistor can be switched clocked.
Erfindungsgemäß wird das Vorbedämpfungselement also nicht nur zuschaltbar, sondern auch abstimmbar gestaltet. Insbesondere soll der Einbau (Betriebszustand) in metallischer oder nichtmetallischer Umgebung manuell und/oder auch automatisch einstellbar sein.According to the pre-damping element is thus not only switchable, but also designed tunable. In particular, the installation (operating state) should be manually and / or automatically adjustable in metallic or non-metallic environment.
Somit kann die erfindungsgemäße Schaltung in induktiven Näherungsschalter mit leitender und nicht leitender Frontfläche verwendet werden. Darüber hinaus kann der Näherungsschalter in eine leitende oder in eine nicht leitende Umgebung eingebaut, und manuell an seine Einbauumgebung angepasst werden, oder seine Umgebung selbst erkennen und das Vorbedämpfungselement selbsttätig ein- oder ausschalten.Thus, the circuit according to the invention can be used in inductive proximity switch with conductive and non-conductive front surface. In addition, the proximity switch can be installed in a conductive or in a non-conductive environment, and manually adapted to its installation environment, or recognize its surroundings itself and turn on the Vorbedämpfungselement automatically on or off.
Die Erfindung wird anhand der Zeichnung näher erläutert.
-
1 zeigt einen erfindungsgemäßen Näherungsschalter als Dreileiter-Gerät. -
2 zeigt das erfindungsgemäße Vorbedämpfungselement perspektivisch. -
3 und4 zeigen weitere Ausführungsbeispiele des Vorbedämpfungselements.
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1 shows a proximity switch according to the invention as a three-wire device. -
2 shows the Vorabsämpfungselement invention in perspective. -
3 and4 show further embodiments of the pre-damping element.
Die
Die Oszillatorschaltung
Die Auswerteschaltung
Da der Oszillatorstrom durch den Abgleichwiderstand RA festgelegt ist, fällt die Amplitude bei Anwesenheit eines Targets (Schaltfahne) im Überwachungsbereich, was bei Unterschreitung einer vorgegeben Schaltschwelle zur Erzeugung eines binären Schaltsignals führt. Das Schaltsignal wird über den P-schaltenden Schalter
Darüber hinaus können mit Hilfe verschiedenfarbiger LEDs Lichtsignale erzeugt werden, die den Schaltzustand, einen Fehler, oder ein sonstiges Signal ausgeben.In addition, light signals can be generated with the aid of LEDs of different colors, which output the switching state, an error, or another signal.
Das Vorbedämpfungselement
Das Vorbedämpfungselement
Die
Das Vorbedämpfungselement
Die
In der
In der
Der erfindungsgemäße induktive Näherungsschalter ist je nach Beschaltung des Vorbedämpfungselements
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Sensorspulesensor coil
- 22
- VorbedämpfungselementVorbedämpfungselement
- 33
- Leiterplattecircuit board
- 44
- Oszillatorschaltungoscillator circuit
- 55
- Auswerteschaltungevaluation
- 66
-
Abstimmwiderstand für des Vorbedämpfungselement 2Tuning resistance for the
pre-damping element 2 - 77
-
Abgleichwiderstand (RA) für die Sensorspule 1Adjustment resistor (RA) for the
sensor coil 1 - 88th
- Steuereinheit (ASIC)Control unit (ASIC)
- 99
- Elektronischer Schalter zur Erzeugung eines binären SchaltsignalsElectronic switch for generating a binary switching signal
- AA
- Binärer SchaltausgangBinary switching output
Claims (5)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015218340.8A DE102015218340B4 (en) | 2015-09-24 | 2015-09-24 | Inductive proximity switch with a pre-damping element |
CN201680054329.3A CN108028649B (en) | 2015-09-24 | 2016-09-21 | Inductive proximity switch with pre-damped element |
PCT/EP2016/072339 WO2017050786A1 (en) | 2015-09-24 | 2016-09-21 | Inductive proximity switch having a pre-damping element |
EP16775532.1A EP3311488A1 (en) | 2015-09-24 | 2016-09-21 | Inductive proximity switch having a pre-damping element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015218340.8A DE102015218340B4 (en) | 2015-09-24 | 2015-09-24 | Inductive proximity switch with a pre-damping element |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102015218340A1 DE102015218340A1 (en) | 2017-03-30 |
DE102015218340B4 true DE102015218340B4 (en) | 2018-06-21 |
Family
ID=57068057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102015218340.8A Active DE102015218340B4 (en) | 2015-09-24 | 2015-09-24 | Inductive proximity switch with a pre-damping element |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3311488A1 (en) |
CN (1) | CN108028649B (en) |
DE (1) | DE102015218340B4 (en) |
WO (1) | WO2017050786A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020133102A1 (en) * | 2018-12-27 | 2020-07-02 | 深圳市大疆创新科技有限公司 | Wireless power supply circuit, camera, wireless power supply method, and readable storage medium |
DE102020113492A1 (en) * | 2020-05-19 | 2021-11-25 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Arrangement for a vehicle for inductive detection of an activation action |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19650793C1 (en) | 1996-12-06 | 1998-04-16 | Siemens Ag | Contactless electronic switch with externally influenceable oscillator |
DE10362165A1 (en) | 2003-04-23 | 2006-12-28 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch |
DE10066293B4 (en) | 2000-09-29 | 2007-11-29 | Balluff Gmbh | Inductive sensor |
DE102006053222A1 (en) | 2006-11-11 | 2008-05-29 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch, has supplementing coil connected firmly with screen, where supplementing coil develops compensation field, which is proportional to transmission field, which is produced by transmitting coil |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4122507Y1 (en) * | 1964-06-24 | 1966-11-10 | ||
DE3177316T2 (en) * | 1980-10-29 | 1996-10-31 | Square D Co | proximity switch |
US5034621A (en) * | 1987-12-16 | 1991-07-23 | Eaton Corporation | Inductive proximity switch exhibiting magnetic field immunity |
DE69033004T2 (en) * | 1989-04-14 | 1999-11-18 | Eja Engineering Plc, Wigan | SAFETY SWITCH ARRANGEMENT |
DE19850749C1 (en) * | 1998-11-04 | 2000-03-30 | Eckart Hiss | Inductive proximity sensor for detecting metal objects; has signal from detector coil and generator coil input to mixer |
EP1372173B1 (en) * | 2001-03-15 | 2008-05-28 | Omron Corporation | Proximity sensor |
DE102009045460B3 (en) * | 2009-10-07 | 2011-02-17 | Balluff Gmbh | Inductive proximity sensor, has evaluation device setting integration results in different areas of output signal or on same areas of output signals of oscillator circuits in relation to each other |
DE102009044820B4 (en) * | 2009-12-08 | 2011-09-01 | Turck Holding Gmbh | Self-calibrating proximity switch |
DE102010003221A1 (en) * | 2010-03-24 | 2011-09-29 | Balluff Gmbh | Electronic component for a sensor device, sensor device and method for configuring a sensor device |
DE102010042816A1 (en) * | 2010-10-22 | 2012-04-26 | Ifm Electronic Gmbh | Inductive proximity switch comprises transmitter coil, two anti-serially switched receiving coils and comparison coil which is coupled with receiving coil, where comparison coil is connected with clocked resistor |
FR2979712B1 (en) * | 2011-09-02 | 2013-09-13 | Schneider Electric Ind Sas | SHIELDED DOUBLE WINDING MULTILAYER ASSEMBLY FOR INDUCTIVE DETECTOR |
US20150145348A1 (en) * | 2012-08-10 | 2015-05-28 | Ifm Electronics Gmbh | Inductive proximity switch |
DE202014105253U1 (en) * | 2014-05-15 | 2014-11-19 | Ifm Electronic Gmbh | Inductive proximity switch |
CN204539111U (en) * | 2015-03-27 | 2015-08-05 | 宜科(天津)电子有限公司 | Inductance approach switch |
-
2015
- 2015-09-24 DE DE102015218340.8A patent/DE102015218340B4/en active Active
-
2016
- 2016-09-21 EP EP16775532.1A patent/EP3311488A1/en not_active Withdrawn
- 2016-09-21 CN CN201680054329.3A patent/CN108028649B/en active Active
- 2016-09-21 WO PCT/EP2016/072339 patent/WO2017050786A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19650793C1 (en) | 1996-12-06 | 1998-04-16 | Siemens Ag | Contactless electronic switch with externally influenceable oscillator |
DE10066293B4 (en) | 2000-09-29 | 2007-11-29 | Balluff Gmbh | Inductive sensor |
DE10362165A1 (en) | 2003-04-23 | 2006-12-28 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch |
DE102006053222A1 (en) | 2006-11-11 | 2008-05-29 | Werner Turck Gmbh & Co. Kg | Inductive proximity switch, has supplementing coil connected firmly with screen, where supplementing coil develops compensation field, which is proportional to transmission field, which is produced by transmitting coil |
Also Published As
Publication number | Publication date |
---|---|
EP3311488A1 (en) | 2018-04-25 |
DE102015218340A1 (en) | 2017-03-30 |
WO2017050786A1 (en) | 2017-03-30 |
CN108028649A (en) | 2018-05-11 |
CN108028649B (en) | 2022-04-22 |
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