CN201699678U - Inductance approach switch - Google Patents
Inductance approach switch Download PDFInfo
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- CN201699678U CN201699678U CN2010202489753U CN201020248975U CN201699678U CN 201699678 U CN201699678 U CN 201699678U CN 2010202489753 U CN2010202489753 U CN 2010202489753U CN 201020248975 U CN201020248975 U CN 201020248975U CN 201699678 U CN201699678 U CN 201699678U
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Abstract
The utility model relates to an approach switch, in particular to an inductance approach switch, which is characterized by comprising an inductance oscillator circuit, a switch power supply circuit and an emitter follower circuit; an oscillator generates an alternating magnetic field, and when a metal object approaches the field and reaches the inductance distance, eddy current is generated in the metal object so as to cause oscillatory extinction even failure of oscillation; and the change of the oscillation and the failure of oscillation of the oscillator is processed by a post amplification circuit and converted into an open magnet signal to trigger and drive a control device, thereby achieving the purpose of non-contacting detection. The inductance approach switch can be widely used in aeronautical and space technologies and industrial production as well as automatic doors, automatic hot air machines of hotels, restaurants, garages for use of daily life, also can be used in places such as material file rooms, accounting rooms, finance, museums, coffers and the like for safety guard, and has the advantages of reliable work, long service life, low power consumption, high restoration and positioning accuracy, high operation frequency, fitting of severe working environments and the like.
Description
Technical field
The utility model relates to a kind of near switch, is specially a kind of inductance approach switch.
Background technology
Claim static position switch again near switch; it is except that can finishing Stroke Control and position limitation protection; or a kind of checkout gear of non-contact type; as detecting accessory size and testing the speed etc.; also can be used for the automatic linking of frequency conversion counter, variable-frequency pulse generator, level control and procedure etc., generally according to its use occasion adopt particular theory of operation near switch.
Summary of the invention
At problems of the prior art, the purpose of this utility model is to provide a kind of technical scheme of inductance approach switch.
Described inductance approach switch, it is characterized in that comprising inductor oscillating device circuit, switching power circuit and emitter output circuit, inductance L 1 one ends and inductance L 2 in the described inductor oscillating device circuit, one end of capacitor C 1 and+the 12V power supply links to each other, the other end of inductance L 1 links to each other with resistance R 14 1 ends with the collector electrode of triode T5, the other end of inductance L 2 links to each other through the emitter-base bandgap grading of resistance R 13 with triode T4, the collector electrode of triode T4 links to each other with an end of resistance R 11, the base stage of triode T4 links to each other with the base stage of triode T5, the other end that the emitter-base bandgap grading of triode T5 connects capacitor C 1 links to each other the other end ground connection of resistance R 14; Resistance R 11 1 ends connect collector electrode and the resistance R 10 of triode T4 in the described switching power circuit, the end of R12, the other end of resistance R 11 and resistance R 7, the negative pole of diode D2 and+the 24V power supply links to each other, the other end ground connection of resistance R 10, one end of the other end of resistance R 12 and resistance R 9, the base stage of triode T3 links to each other, the collector electrode of the other end of resistance R 9 and triode T2, one end of resistance R 3 links to each other, the other end of resistance R 7 links to each other with the emitter-base bandgap grading of triode T3 and an end of resistance R 4, resistance R 4 other end ground connection, the collector electrode of triode T3 links to each other with an end of resistance R 6, the emitter-base bandgap grading of the other end of resistance R 6 and triode T2, one end of resistance R 5 and the positive pole of diode D3 link to each other, the base stage of the other end of resistance R 5 and triode T2, one end of resistance R 8 links to each other, the other end ground connection of resistance R 8; An end of resistance R 2 links to each other with the negative pole of diode D2 and the emitter-base bandgap grading of triode T1 in the described emitter output circuit, the other end of resistance R 2 links to each other with an end of resistance R 3 and the base stage of triode T1, the other end of resistance R 3 connects the collector electrode of triode T2, the collector electrode of triode T1 links to each other with the negative pole of diode D3 and the positive pole of diode D1, the negative pole of diode D1 links to each other with the positive pole of diode D2 and an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of light-emitting diode VD1, and the negative pole of light-emitting diode VD1 links to each other with the base stage of triode T2.
Described inductance approach switch is characterized in that the just very VCC12V input of described diode D2, the just very VCC24V output of diode D1, the negative pole of light-emitting diode VD1 are public COM end.
Described inductance approach switch is characterized in that described triode T1 adopts A1020, and triode T2 adopts C1740, and triode T3, T4, T5 all adopt A933AS.
Described inductance approach switch is characterized in that described diode D1, D2, D3 all adopt 1N4001.
Described inductance approach switch is characterized in that described light-emitting diode VD1 adopts BT112-X.
Above-mentioned inductance approach switch, can be widely used in aviation, in space technology and the industrial production, in daily life, as the hotel, the restaurant, the automatically-controlled door in garage, all can use on the automatic hot-air machine, aspect safe antitheft, as profile, financial accounting, finance, the museum, important places such as national treasury all can be used, in measuring technique, as length, the measurement of position all can be used, in control technology, as displacement, speed, the measurement of acceleration and control all can be used, and have reliable operation, life-span is long, low in energy consumption, multiple positioning accuracy height, advantages such as frequency of operation height and adaptation bad working environment.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with Figure of description the utility model is described further:
As shown in the figure, inductance approach switch, comprise inductor oscillating device circuit 1, switching power circuit 2 and emitter output circuit 3, inductance L 1 one ends and inductance L 2 in the described inductor oscillating device circuit 1, one end of capacitor C 1 and+the 12V power supply links to each other, the other end of inductance L 1 links to each other with resistance R 14 1 ends with the collector electrode of triode T5, the other end of inductance L 2 links to each other through the emitter-base bandgap grading of resistance R 13 with triode T4, the collector electrode of triode T4 links to each other with an end of resistance R 11, the base stage of triode T4 links to each other with the base stage of triode T5, the other end that the emitter-base bandgap grading of triode T5 connects capacitor C 1 links to each other the other end ground connection of resistance R 14; Resistance R 11 1 ends connect collector electrode and the resistance R 10 of triode T4 in the described switching power circuit 2, the end of R12, the other end of resistance R 11 and resistance R 7, the negative pole of diode D2 and+the 24V power supply links to each other, the other end ground connection of resistance R 10, one end of the other end of resistance R 12 and resistance R 9, the base stage of triode T3 links to each other, the collector electrode of the other end of resistance R 9 and triode T2, one end of resistance R 3 links to each other, the other end of resistance R 7 links to each other with the emitter-base bandgap grading of triode T3 and an end of resistance R 4, resistance R 4 other end ground connection, the collector electrode of triode T3 links to each other with an end of resistance R 6, the emitter-base bandgap grading of the other end of resistance R 6 and triode T2, one end of resistance R 5 and the positive pole of diode D3 link to each other, the base stage of the other end of resistance R 5 and triode T2, one end of resistance R 8 links to each other, the other end ground connection of resistance R 8; An end of resistance R 2 links to each other with the negative pole of diode D2 and the emitter-base bandgap grading of triode T1 in the described emitter output circuit 3, the other end of resistance R 2 links to each other with an end of resistance R 3 and the base stage of triode T1, the other end of resistance R 3 connects the collector electrode of triode T2, the collector electrode of triode T1 links to each other with the negative pole of diode D3 and the positive pole of diode D1, the negative pole of diode D1 links to each other with the positive pole of diode D2 and an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of light-emitting diode VD1, and the negative pole of light-emitting diode VD1 links to each other with the base stage of triode T2.
The just very VCC12V input of described diode D2, the just very VCC24V output of diode D1, the negative pole of light-emitting diode VD1 are public COM end.
Described triode T1 adopts A1020, and triode T2 adopts C1740, and triode T3, T4, T5 all adopt A933AS, and diode D1, D2, D3 all adopt 1N4001, and light-emitting diode VD1 adopts BT112-X.
In inductor oscillating device circuit 1, T5 forms oscillator by triode, and wherein inductance L 1, capacitor C 1 are formed frequency selection circuit, and inductance L 2 is feedback coils, and inductance L 1 and inductance L 2 are on same magnetic core.
When ferromagnet does not have the inductive head of close switch, oscillating circuit is kept vibration, the output of interchange is arranged on the inductance L 2, after diode D2 rectification, make triode T3 obtain enough bias currents and work in the saturation conduction state, this moment, Uce2 ≈ 0, triode T3 ends, and the emitter follower no-output is connected on the triode T2 no power of output.
When ferromagnet during near inductive head, eddy current is produced in the ferromagnet induction, because the demagnetizing effect of eddy current, weaken the coupling between inductance L 1 and the inductance L 2, make feedback quantity be not enough to keep vibration, thereby oscillator is forced to failure of oscillation, triode T3 goes up does not have the output of interchange, triode T2 ends, and emitter follower is exported also near VCC12V, makes triode T2 energising.
Triode T1 adopts emitter-base bandgap grading output, be in order to improve carrying load ability, diode D1 is the positive feedback diode, when the circuit failure of oscillation, the collector voltage of a triode T1 feedback part is arrived the emitter of triode T2 by it, triode T2 emitter current potential is improved, guaranteeing oscillating circuit failure of oscillation rapidly and reliably, and when the circuit starting of oscillation, Uce2 ≈ 0, no feedback voltage makes oscillating circuit recover vibration rapidly, makes the action of switch more rapid and accurate.
Claims (5)
1. inductance approach switch, it is characterized in that comprising inductor oscillating device circuit (1), switching power circuit (2) and emitter output circuit (3), inductance L 1 one ends and inductance L 2 in the described inductor oscillating device circuit (1), one end of capacitor C 1 and+the 12V power supply links to each other, the other end of inductance L 1 links to each other with resistance R 14 1 ends with the collector electrode of triode T5, the other end of inductance L 2 links to each other through the emitter-base bandgap grading of resistance R 13 with triode T4, the collector electrode of triode T4 links to each other with an end of resistance R 11, the base stage of triode T4 links to each other with the base stage of triode T5, the other end that the emitter-base bandgap grading of triode T5 connects capacitor C 1 links to each other the other end ground connection of resistance R 14; Resistance R 11 1 ends connect collector electrode and the resistance R 10 of triode T4 in the described switching power circuit (2), the end of R12, the other end of resistance R 11 and resistance R 7, the negative pole of diode D2 and+the 24V power supply links to each other, the other end ground connection of resistance R 10, one end of the other end of resistance R 12 and resistance R 9, the base stage of triode T3 links to each other, the collector electrode of the other end of resistance R 9 and triode T2, one end of resistance R 3 links to each other, the other end of resistance R 7 links to each other with the emitter-base bandgap grading of triode T3 and an end of resistance R 4, resistance R 4 other end ground connection, the collector electrode of triode T3 links to each other with an end of resistance R 6, the emitter-base bandgap grading of the other end of resistance R 6 and triode T2, one end of resistance R 5 and the positive pole of diode D3 link to each other, the base stage of the other end of resistance R 5 and triode T2, one end of resistance R 8 links to each other, the other end ground connection of resistance R 8; An end of resistance R 2 links to each other with the negative pole of diode D2 and the emitter-base bandgap grading of triode T1 in the described emitter output circuit (3), the other end of resistance R 2 links to each other with an end of resistance R 3 and the base stage of triode T1, the other end of resistance R 3 connects the collector electrode of triode T2, the collector electrode of triode T1 links to each other with the negative pole of diode D3 and the positive pole of diode D1, the negative pole of diode D1 links to each other with the positive pole of diode D2 and an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of light-emitting diode VD1, and the negative pole of light-emitting diode VD1 links to each other with the base stage of triode T2.
2. inductance approach switch according to claim 1 is characterized in that the just very VCC12V input of described diode D2, the just very VCC24V output of diode D1, the negative pole of light-emitting diode VD1 are public COM end.
3. inductance approach switch according to claim 1 is characterized in that described triode T1 adopts A1020, and triode T2 adopts C1740, and triode T3, T4, T5 all adopt A933AS.
4. inductance approach switch according to claim 1 is characterized in that described diode D1, D2, D3 all adopt 1N4001.
5. inductance approach switch according to claim 1 is characterized in that described light-emitting diode VD1 adopts BT112-X.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202489753U CN201699678U (en) | 2010-06-25 | 2010-06-25 | Inductance approach switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202489753U CN201699678U (en) | 2010-06-25 | 2010-06-25 | Inductance approach switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201699678U true CN201699678U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202489753U Expired - Fee Related CN201699678U (en) | 2010-06-25 | 2010-06-25 | Inductance approach switch |
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| CN (1) | CN201699678U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937722A (en) * | 2012-10-29 | 2013-02-20 | 陶燕清 | Metal proximity sensor |
| CN103147657A (en) * | 2013-04-01 | 2013-06-12 | 周玉林 | Automatic door control circuit |
| CN103693077A (en) * | 2013-12-21 | 2014-04-02 | 兖州煤业股份有限公司 | Device for derailment monitoring of coal mine endless rope towing vehicle |
| CN104613858A (en) * | 2015-01-23 | 2015-05-13 | 山东大学 | Tunnel surrounding rock primary bracing horizontal convergence displacement monitoring instrument and method |
| CN107041640A (en) * | 2015-12-28 | 2017-08-15 | 科勒公司 | Cabinet system including annex |
| CN108988842A (en) * | 2018-06-11 | 2018-12-11 | 贵州振华华联电子有限公司 | A kind of close switch of highly reliable small inductance formula |
| US11147405B2 (en) | 2015-12-28 | 2021-10-19 | Robern, Inc. | Cabinet system including accessory |
-
2010
- 2010-06-25 CN CN2010202489753U patent/CN201699678U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937722A (en) * | 2012-10-29 | 2013-02-20 | 陶燕清 | Metal proximity sensor |
| CN102937722B (en) * | 2012-10-29 | 2016-05-04 | 陶燕清 | Metal approach sensor |
| CN103147657A (en) * | 2013-04-01 | 2013-06-12 | 周玉林 | Automatic door control circuit |
| CN103693077A (en) * | 2013-12-21 | 2014-04-02 | 兖州煤业股份有限公司 | Device for derailment monitoring of coal mine endless rope towing vehicle |
| CN104613858A (en) * | 2015-01-23 | 2015-05-13 | 山东大学 | Tunnel surrounding rock primary bracing horizontal convergence displacement monitoring instrument and method |
| CN107041640A (en) * | 2015-12-28 | 2017-08-15 | 科勒公司 | Cabinet system including annex |
| US11147405B2 (en) | 2015-12-28 | 2021-10-19 | Robern, Inc. | Cabinet system including accessory |
| US11612261B2 (en) | 2015-12-28 | 2023-03-28 | Robern, Inc. | Cabinet system including accessory |
| US11882953B2 (en) | 2015-12-28 | 2024-01-30 | Robern, Inc. | Cabinet system |
| CN108988842A (en) * | 2018-06-11 | 2018-12-11 | 贵州振华华联电子有限公司 | A kind of close switch of highly reliable small inductance formula |
| CN108988842B (en) * | 2018-06-11 | 2022-05-17 | 贵州振华华联电子有限公司 | High-reliability small-sized inductance type proximity switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20180625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |