CN103076518A - Electromagnet state detection circuit of flat knitting machine - Google Patents
Electromagnet state detection circuit of flat knitting machine Download PDFInfo
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- CN103076518A CN103076518A CN2012105883952A CN201210588395A CN103076518A CN 103076518 A CN103076518 A CN 103076518A CN 2012105883952 A CN2012105883952 A CN 2012105883952A CN 201210588395 A CN201210588395 A CN 201210588395A CN 103076518 A CN103076518 A CN 103076518A
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Abstract
The invention provides an electromagnet state detection circuit of a flat knitting machine, and the electromagnet state detection circuit comprises an electric controller, a flat knitting machine magnet drive circuit, a flat knitting machine electromagnet and a flat knitting machine electromagnet detection unit, wherein the electric controller is electrically connected with the flat knitting machine magnet drive circuit, the flat knitting machine magnet drive circuit is electrically connected with the flat knitting machine electromagnet, the flat knitting machine electromagnet detection unit comprises a plurality of inverse proportion circuits, a plurality of voltage comparison circuits, an adjustable reference voltage source and a microprocessor, an inverting input end of the inverse proportion circuit is electrically connected with the flat knitting machine electromagnet through a signal output interface, an output end of the inverse proportion circuit is electrically connected with the inverting input end of the voltage comparison circuit, the output end of the adjustable reference voltage source is electrically connected with the non-inverting input end of the voltage comparison circuit, the output end of the voltage comparison circuit is electrically connected with the microprocessor, and the microprocessor is electrically connected with the electric controller. The electromagnet state detection circuit of the flat knitting machine is simple in structure, low in cost and capable of rapidly controlling the state of the flat knitting machine electromagnet and enabling the flat knitting machine to be rapidly and efficiently protected in time.
Description
Technical field
The present invention relates to the Weaving device field, refer in particular to a kind of straight-bar machines electromagnet state detection circuit.
Background technology
At present, Computerized flat knitting machine becomes the common apparatus in knitting technology field gradually, and needs to use multiple electromagnet on the Computerized flat knitting machine, such as needle selection electromagnet, triangle electromagnet, yarn mouth electromagnet etc., selects the multiple operations such as shuttle, needle selection.The head electric controller major control needle selection electromagnet of Computerized flat knitting machine; the triangle electromagnet; yarn mouth electromagnet and stepper motor etc.; these equipment have the special-purpose auxiliary protection circuits such as current foldback circuit; but only have these still can not guarantee the normal operation of straight-bar machines system fully; there was a mechanical failure and can not get or return such as yarn mouth electromagnet; the execution action of control yarn mouth that just can not be correct; electromagnet is mostly without measuring ability in the existing straight-bar machines computer system; the straight-bar machines computer system can't be learnt and can't in time stop; just may cause the braiding mistake, cause the serious consequences such as mechanical disorder.
Because this serious consequence, electromagnet to positions such as yarn mouths in the part straight-bar machines system detects, adopt sensor plan in the testing circuit, such as the position probing that each yarn mouth in the system is moved, this scheme often needs a large amount of extra cablings, complicated in mechanical structure is assembled loaded down with trivial detailsly, and cost is very high.
The day for announcing is that the patent document that March 31, notification number in 2011 are CN201780837U has proposed a kind of electromagnet for computerized flat knitting machine, comprise yoke, yoke is U-shaped, also comprise electromagnet and permanent magnet, electromagnet and permanent magnet are set up in parallel in U-shaped yoke, electromagnet comprises coil and armature, and armature is fixed by pin, and armature rotates take pin as axle.Electromagnet for computerized flat knitting machine in this utility model, simple in structure, volume is little, but lack equally the device that detects straight-bar machines electromagnet state, there was a mechanical failure and can not get or return when the straight-bar machines electromagnet, control execution action that just can not be correct, thus may cause mechanical disorder etc.
Summary of the invention
Can't detect straight-bar machines electromagnet or the complicated loaded down with trivial details problem of straight-bar machines electromagnet testing circuit in order to solve existing straight-bar machines system; the present invention proposes a kind of straight-bar machines electromagnet state detection circuit; take full advantage of the characteristic of electromagnet itself; expanded the straight-bar machines function; and simple in structure; with low cost, can grasp rapidly the state of straight-bar machines electromagnet, thereby make straight-bar machines obtain in time protecting fast and effectively.
The technical solution adopted in the present invention is: a kind of straight-bar machines electromagnet state detection circuit, comprise electric controller, straight-bar machines magnet drives circuit and straight-bar machines electromagnet, described electric controller is electrically connected with straight-bar machines magnet drives circuit, described straight-bar machines magnet drives circuit and straight-bar machines electromagnet are electrically connected, also comprise some roads straight-bar machines electromagnet detecting unit, described straight-bar machines electromagnet detecting unit comprises the reverse ratio circuit in some roads, some roads voltage comparator circuit, adjustable reference voltage source and microprocessor, the inverting input of described reverse ratio circuit is electrically connected with the straight-bar machines electromagnet, the output terminal of described reverse ratio circuit is electrically connected with the inverting input of voltage comparator circuit, the output terminal of described adjustable reference voltage source is electrically connected with the normal phase input end of voltage comparator circuit, the output terminal of described voltage comparator circuit is electrically connected with microprocessor, and described microprocessor and electric controller are electrically connected.
Another coil produced the ultimate principle of induction electromotive force when the present invention had utilized one of them coil electricity of electromagnet to move, electromagnet fails to get to the position as running into fault in getting the process of returning, the induction electromotive force voltage swing on the coil has different the variation.Utilize this principle, the present invention can detect the different operating state of each straight-bar machines electromagnet easily, utilizing testing circuit that the multichannel state is carried out high-speed parallel judges, do not miss each misoperation of straight-bar machines electromagnet, when finding fault, report immediately, and report the straight-bar machines electromagnet of malfunction in man-machine interface.
As preferably, described reverse ratio circuit comprises ratio amplifier U1, the power end of ratio amplifier U1 connects respectively+the 12V power supply and-the 24V power supply, the normal phase input end of ratio amplifier U1 is by resistance R 2 ground connection, the inverting input of ratio amplifier U1 is electrically connected with signal output interface by resistance R 1, is connected with resistance R 3 between the inverting input of the output terminal of ratio amplifier U1 and ratio amplifier U1.Oppositely ratio circuit will zoom in or out from the reverse ratio of voltage signal that the straight-bar machines electromagnet obtains, and is delivered to voltage comparator circuit.
As preferably, described voltage comparator circuit comprises comparison amplifier U2, relatively the power end of amplifier U2 connects respectively+the 12V VDD-to-VSS, relatively the normal phase input end of amplifier U2 is electrically connected with the output terminal of adjustable reference voltage source, and relatively the inverting input of amplifier U2 is electrically connected with the output terminal of ratio amplifier U1.The voltage signal that voltage comparator circuit will obtain from reverse ratio circuit with make comparisons from the reference voltage source signal of adjustable reference voltage source,
As preferably, in the described voltage comparator circuit, relatively the output terminal of amplifier U2 is connected with+3.3V power supply by pull-up resistor R4.Because the comparison amplifier selected is exported for opening Lou, so must add and draw resistance that drive current is provided.
As preferably, be electrically connected by on-off circuit between the inverting input of described reverse ratio circuit and the straight-bar machines electromagnet.On-off circuit can cut off the electrical connection of straight-bar machines electromagnet detecting unit and straight-bar machines electromagnet at any time.
As preferably, straight-bar machines electromagnet detecting unit also comprises warning circuit, and described warning circuit is electrically connected with microprocessor.The various ways such as warning circuit can employing sound, light are to warn.
The invention has the beneficial effects as follows: simple in structure, with low cost, can grasp rapidly the state of straight-bar machines electromagnet, thereby make straight-bar machines obtain in time protecting fast and effectively.
Description of drawings
Fig. 1 is a kind of structured flowchart of the present invention;
Fig. 2 is the structural representation of straight-bar machines electromagnet among the present invention;
Fig. 3 is the reverse circuit theory diagrams of ratio circuit and voltage comparator circuit among the present invention.
Among the figure, 1-electric controller, 2-straight-bar machines magnet drives circuit, 3-straight-bar machines electromagnet, 4-straight-bar machines electromagnet detecting unit, the reverse ratio circuit of 5-, 6-voltage comparator circuit, the adjustable reference voltage source of 7-, 8-microprocessor, 9-on-off circuit, 10-circuit for alarming.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of straight-bar machines electromagnet state detection circuit, comprise electric controller 1, straight-bar machines magnet drives circuit 2, straight-bar machines electromagnet 3 and ten No. six straight-bar machines electromagnet detecting units 4, electric controller 1 is electrically connected with straight-bar machines magnet drives circuit 2, and straight-bar machines magnet drives circuit 2 and straight-bar machines electromagnet 3 are electrically connected.Provide action sequence and the signal pulse of electromagnet by electric controller 1, provide driving force by multichannel straight-bar machines solenoid driver circuit 2 again, by the low voltage control high pressure, thereby drive straight-bar machines electromagnet 3 effective actions, the getting and returning of control straight-bar machines electromagnet 3.Straight-bar machines electromagnet detecting unit 4 comprises reverse ratio circuit 5, voltage comparator circuit 6, adjustable reference voltage source 7, microprocessor 8 and warning circuit, and microprocessor 8 is electrically connected with electric controller 1, warning circuit 10 respectively.
The structure of straight-bar machines electromagnet 3 contains 2 coils as shown in Figure 2, and a is two coil common port pins, and b is a coil pin, and c is another coil pin.Two coil pin b of straight-bar machines electromagnet 3 are connected with c by signal output interface and are connected with reverse ratio circuit 5.
Oppositely ratio circuit 5 comprises ratio amplifier U1, that ratio amplifier U1 adopts is two-way integrated operational amplifier LM358, be illustrated in figure 3 as wherein one the tunnel, the power interface of ratio amplifier U1 connects respectively+the 12V power supply and-the 24V power supply, the normal phase input end of ratio amplifier U1 is by resistance R 2 ground connection, the inverting input of the reverse ratio circuit 4 of ratio amplifier U1 is connected with on-off circuit 9, on-off circuit 9 is electrically connected with straight-bar machines electromagnet 3 by the output signal interface, be connected with resistance R 3 between the inverting input of the output terminal of ratio amplifier U1 and ratio amplifier U1, resistance R 3 is less than resistance R 1.Oppositely ratio circuit 5 will dwindle from the reverse ratio of voltage signal Vin that the straight-bar machines electromagnet obtains, and obtain intermediate voltage signal Vo=-(R3/R1) Vin, and be delivered to voltage comparator circuit 6.On-off circuit 9 can cut off the electrical connection of straight-bar machines electromagnet detecting unit and straight-bar machines electromagnet at any time.
Voltage comparator circuit 6 comprises comparison amplifier U2, that relatively amplifier U2 adopts is four road voltage comparator LM339, can judge simultaneously the state of four road electromagnet, be illustrated in figure 3 as wherein one the tunnel, relatively the power interface of amplifier U2 connects respectively+the 12V VDD-to-VSS, relatively the normal phase input end of amplifier U2 is electrically connected with the output terminal of adjustable reference voltage source 7, relatively the inverting input of amplifier U2 is electrically connected with the output terminal of ratio amplifier U1, relatively the output terminal of amplifier U2 is connected with+3.3V power supply by pull-up resistor R4, and the output terminal of voltage comparator circuit 6 is electrically connected with microprocessor 8.The voltage signal Vo that voltage comparator circuit 6 will obtain from reverse ratio circuit 5 and the reference voltage source signal Vref from adjustable reference voltage source 7 make comparisons.
Two coil signals of every road straight-bar machines electromagnet 3 all pass through first reverse ratio circuit 5; the pulse of driving signal voltage and the induced electromotive force pulse that are reduced; pass through again voltage comparator circuit 6; come the voltage of comparison induction electromotive force to compare with the reference voltage signal under normal circumstances of presetting; expression has fault as surpassing then; the comparer output level changes; because the comparer of selecting is OC output; then compatible with the rear class level easily; the signal that 8 pairs of all electromagnet of microprocessor detect walks abreast and judges fast; guarantee Check processing speed, if there is fault then to return electric controller 1, reaches and in time protect fast and effectively purpose.
The present invention can detect the status information of multi-channel electromagnet simultaneously applicable to multiple electromagnet such as the needle selection electromagnet on the straight-bar machines, triangle electromagnet, yarn mouth electromagnet.
Above embodiment only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of doing on the technical scheme basis all falls within protection scope of the present invention.
Claims (6)
1. straight-bar machines electromagnet state detection circuit, comprise electric controller, straight-bar machines magnet drives circuit and straight-bar machines electromagnet, described electric controller is electrically connected with straight-bar machines magnet drives circuit, described straight-bar machines magnet drives circuit and straight-bar machines electromagnet are electrically connected, it is characterized in that: also comprise straight-bar machines electromagnet detecting unit, described straight-bar machines electromagnet detecting unit comprises the reverse ratio circuit in some roads, some roads voltage comparator circuit, adjustable reference voltage source and microprocessor, the inverting input of described reverse ratio circuit is electrically connected with the straight-bar machines electromagnet by signal output interface, the output terminal of described reverse ratio circuit is electrically connected with the inverting input of voltage comparator circuit, the output terminal of described adjustable reference voltage source is electrically connected with the normal phase input end of voltage comparator circuit, the output terminal of described voltage comparator circuit is electrically connected with microprocessor, and described microprocessor and electric controller are electrically connected.
2. straight-bar machines electromagnet state detection circuit according to claim 1, it is characterized in that: described reverse ratio circuit comprises ratio amplifier U1, the power end of ratio amplifier U1 connects respectively+the 12V power supply and-the 24V power supply, the normal phase input end of ratio amplifier U1 is by resistance R 2 ground connection, the inverting input of ratio amplifier U1 is electrically connected with signal output interface by resistance R 1, is connected with resistance R 3 between the inverting input of the output terminal of ratio amplifier U1 and ratio amplifier U1.
3. straight-bar machines electromagnet state detection circuit according to claim 1, it is characterized in that: described voltage comparator circuit comprises comparison amplifier U2, relatively the power end of amplifier U2 connects respectively+the 12V VDD-to-VSS, relatively the normal phase input end of amplifier U2 is electrically connected with the output terminal of adjustable reference voltage source, and relatively the inverting input of amplifier U2 is electrically connected with the output terminal of ratio amplifier U1.
4. straight-bar machines electromagnet state detection circuit according to claim 3 is characterized in that: in the described voltage comparator circuit, relatively the output terminal of amplifier U2 is connected with+3.3V power supply by pull-up resistor R4.
5. straight-bar machines electromagnet state detection circuit according to claim 1 is characterized in that: be electrically connected by on-off circuit between the inverting input of described reverse ratio circuit and the signal output interface.
6. according to claim 1 and 2 or 3 or 4 or 5 described straight-bar machines electromagnet state detection circuits, it is characterized in that: straight-bar machines electromagnet detecting unit also comprises warning circuit, and described warning circuit is electrically connected with microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588395.2A CN103076518B (en) | 2012-12-29 | 2012-12-29 | Straight-bar machines electromagnet state detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210588395.2A CN103076518B (en) | 2012-12-29 | 2012-12-29 | Straight-bar machines electromagnet state detection circuit |
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| CN103076518A true CN103076518A (en) | 2013-05-01 |
| CN103076518B CN103076518B (en) | 2016-01-20 |
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| CN201210588395.2A Active CN103076518B (en) | 2012-12-29 | 2012-12-29 | Straight-bar machines electromagnet state detection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246221A (en) * | 2013-05-27 | 2013-08-14 | 南京信息工程大学 | Self-induction closed-loop control system and control method of electromagnet |
| CN110469948A (en) * | 2019-09-16 | 2019-11-19 | 宁波奥克斯电气股份有限公司 | A kind of protection locking and release circuit and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04332876A (en) * | 1991-05-08 | 1992-11-19 | Fujitsu Ltd | Operation state detection circuit |
| CN201465703U (en) * | 2009-05-11 | 2010-05-12 | 许益人 | Electromagnet with working condition detecting device |
| CN202042873U (en) * | 2011-03-12 | 2011-11-16 | 浙江恒强科技股份有限公司 | Overcurrent protection system for flat machine electromagnets |
-
2012
- 2012-12-29 CN CN201210588395.2A patent/CN103076518B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04332876A (en) * | 1991-05-08 | 1992-11-19 | Fujitsu Ltd | Operation state detection circuit |
| CN201465703U (en) * | 2009-05-11 | 2010-05-12 | 许益人 | Electromagnet with working condition detecting device |
| CN202042873U (en) * | 2011-03-12 | 2011-11-16 | 浙江恒强科技股份有限公司 | Overcurrent protection system for flat machine electromagnets |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103246221A (en) * | 2013-05-27 | 2013-08-14 | 南京信息工程大学 | Self-induction closed-loop control system and control method of electromagnet |
| CN110469948A (en) * | 2019-09-16 | 2019-11-19 | 宁波奥克斯电气股份有限公司 | A kind of protection locking and release circuit and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN103076518B (en) | 2016-01-20 |
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