CN103076518B - Straight-bar machines electromagnet state detection circuit - Google Patents
Straight-bar machines electromagnet state detection circuit Download PDFInfo
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- CN103076518B CN103076518B CN201210588395.2A CN201210588395A CN103076518B CN 103076518 B CN103076518 B CN 103076518B CN 201210588395 A CN201210588395 A CN 201210588395A CN 103076518 B CN103076518 B CN 103076518B
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Abstract
The present invention proposes a kind of straight-bar machines electromagnet state detection circuit, comprise electric controller, straight-bar machines magnet drives circuit, straight-bar machines electromagnet and straight-bar machines electromagnet detecting unit, electric controller is electrically connected with straight-bar machines magnet drives circuit, straight-bar machines magnet drives circuit and the electrical connection of straight-bar machines electromagnet, 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 reverse ratio circuit is electrically connected with straight-bar machines electromagnet by signal output interface, the output terminal of reverse ratio circuit is electrically connected with the inverting input of voltage comparator circuit, the output terminal of adjustable reference voltage source is electrically connected with the normal phase input end of voltage comparator circuit, the output terminal of voltage comparator circuit is electrically connected with microprocessor, microprocessor and electric controller electrical connection.Structure of the present invention is simple, with low cost, can grasp rapidly the state of straight-bar machines electromagnet, thus make straight-bar machines obtain protecting fast and effectively in time.
Description
Technical field
The present invention relates to field of textile equipment, 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 Computerized flat knitting machine needs use multiple electromagnet, as needle selection electromagnet, triangle electromagnet, yarn mouth electromagnet etc., carries out selecting the multiple operation such as shuttle, needle selection.The head electric controller major control needle selection electromagnet of Computerized flat knitting machine, triangle electromagnet, yarn mouth electromagnet and stepper motor etc., these equipment have the auxiliary protection circuits such as special current foldback circuit, but only have these still can not ensure the normal operation of straight-bar machines system completely, such as there was a mechanical failure and can not get or return for yarn mouth electromagnet, performing an action of control yarn mouth that just can not be correct, in existing straight-bar machines computer system, electromagnet is mostly without measuring ability, straight-bar machines computer system cannot be learnt and cannot stop in time, just may cause braiding mistake, cause the serious consequences such as mechanical disorder.
Due to this serious consequence, in part straight-bar machines system, the electromagnet at the positions such as yarn mouth is detected, sensor plan is adopted in testing circuit, position as carried out action to yarn mouth each in system is detected, this scheme often needs a large amount of extra cablings, complicated in mechanical structure, assembles loaded down with trivial details, and cost is very high.
The patent document that the day for announcing is on March 31st, 2011, notification number is CN201780837U proposes 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 juxtaposed in U-shaped yoke, electromagnet comprises coil and armature, and armature is fixed by pin, and armature is that axle rotates with pin.Electromagnet for computerized flat knitting machine in this utility model, structure is simple, and volume is little, but lack the device detecting straight-bar machines electromagnet state equally, when straight-bar machines electromagnet, there was a mechanical failure and can not get or return, and just correct control can not perform an action, thus may cause mechanical disorder etc.
Summary of the invention
Straight-bar machines electromagnet or the complicated loaded down with trivial details problem of straight-bar machines electromagnet testing circuit cannot be detected 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; extend straight-bar machines function; and structure is simple; with low cost, the state of straight-bar machines electromagnet can be grasped rapidly, thus make straight-bar machines obtain protecting fast and effectively in time.
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 the electrical connection of straight-bar machines electromagnet, 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 straight-bar machines electromagnet, the described output terminal of reverse ratio circuit is electrically connected with the inverting input of voltage comparator circuit, the described output terminal of 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, described microprocessor and electric controller electrical connection, straight-bar machines electromagnet detecting unit also comprises warning circuit, described warning circuit is electrically connected with microprocessor, the inverting input of described reverse ratio circuit is electrically connected by on-off circuit with between straight-bar machines electromagnet.
When present invention utilizes one of them coil electricity action of electromagnet, another coil produces the ultimate principle of induction electromotive force, electromagnet fails to get to position getting in the process of returning as run into fault, and the induction electromotive force voltage swing on coil has different change.Utilize this principle, the present invention can detect the operating state that each straight-bar machines electromagnet is different easily, testing circuit is utilized to carry out high-speed parallel judgement to multichannel state, do not miss each misoperation of straight-bar machines electromagnet, report immediately when a fault is found, and in man-machine interface, report the straight-bar machines electromagnet of malfunction.Warning circuit can adopt the various ways such as sound, light, to warn.
As preferably, described reverse ratio circuit comprises ratio amplifier U1, the power end of ratio amplifier U1 connects+12V power supply and-24V power supply respectively, the normal phase input end of ratio amplifier U1 is by resistance R2 ground connection, the inverting input of ratio amplifier U1 is electrically connected with signal output interface by resistance R1, is connected with resistance R3 between the output terminal of ratio amplifier U1 and the inverting input of ratio amplifier U1.Reverse ratio circuit is by reverse for the voltage signal obtained from straight-bar machines electromagnet scale amplifying or reduce, and is delivered to voltage comparator circuit.
As preferably, described voltage comparator circuit comprises and compares amplifier U2, relatively the power end of amplifier U2 connects+12V VDD-to-VSS respectively, relatively the normal phase input end of amplifier U2 is electrically connected with the output terminal of adjustable reference voltage source, and the inverting input comparing amplifier U2 is electrically connected with the output terminal of ratio amplifier U1.The voltage signal obtained from reverse ratio circuit and the reference voltage source signal from adjustable reference voltage source are made comparisons by voltage comparator circuit.
As preferably, in described voltage comparator circuit, the output terminal comparing amplifier U2 is connected with+3.3V power supply by pull-up resistor R4.Because the comparison amplifier selected Lou exports, so must add pull-up resistor to provide drive current for opening.
As preferably, the inverting input of described reverse ratio circuit is electrically connected by on-off circuit with between 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.
The invention has the beneficial effects as follows: structure is simple, with low cost, can grasp rapidly the state of straight-bar machines electromagnet, thus make straight-bar machines obtain protecting fast and effectively in time.
Accompanying drawing explanation
Fig. 1 is a kind of structured flowchart of the present invention;
Fig. 2 is the structural representation of straight-bar machines electromagnet in the present invention;
Fig. 3 is the circuit theory diagrams of reverse ratio circuit and voltage comparator circuit in the present invention.
In 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, 7-adjustable reference voltage source, 8-microprocessor, 9-on-off circuit, 10-circuit for alarming.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
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 unit 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.Action sequence and the signal pulse of electromagnet are provided by electric controller 1, then provide driving force by multichannel straight-bar machines solenoid driver circuit 2, by low voltage control high pressure, thus drive straight-bar machines electromagnet 3 effective action, control getting and returning of 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.
As shown in Figure 2, containing 2 coils, a is two coil common port pins to the structure of straight-bar machines electromagnet 3, 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 reverse ratio circuit 5 respectively by signal output interface with c.
Reverse ratio circuit 5 comprises ratio amplifier U1, that ratio amplifier U1 adopts is two-way integrated operational amplifier LM358, be illustrated in figure 3 a wherein road, the power interface of ratio amplifier U1 connects+12V power supply and-24V power supply respectively, the normal phase input end of ratio amplifier U1 is by resistance R2 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 output signal interface, resistance R3 is connected with between the output terminal of ratio amplifier U1 and the inverting input of ratio amplifier U1, resistance R3 is less than resistance R1.The reverse scale smaller of voltage signal Vin that reverse ratio circuit 5 will obtain from straight-bar machines electromagnet, obtains intermediate voltage signal Vo=-(R3/R1) Vin, and is 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 and compares amplifier U2, relatively amplifier U2 adopts Shi tetra-road voltage comparator LM339, the state of four road electromagnet can be judged simultaneously, be illustrated in figure 3 a wherein road, relatively the power interface of amplifier U2 connects+12V VDD-to-VSS respectively, 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, the output terminal of voltage comparator circuit 6 is electrically connected with microprocessor 8.The voltage signal Vo obtained from reverse ratio circuit 5 and the reference voltage source signal Vref from adjustable reference voltage source 7 make comparisons by voltage comparator circuit 6.
Two coil signals of every road straight-bar machines electromagnet 3 all first pass through reverse ratio circuit 5, the drive singal potential pulse be reduced and induced electromotive force pulse, again through voltage comparator circuit 6, the voltage comparing induction electromotive force compares with the reference voltage signal under normal circumstances preset, as exceeded, indicate fault, comparer output level changes, because the comparer selected is that OC exports, then compatible with rear class level easily, microprocessor 8 carries out walking abreast to the signal that all electromagnet detect and judges fast, ensure check processing speed, if there is fault then to return electric controller 1, reach and protect object fast and effectively in time.
The present invention is applicable to the multiple electromagnet such as needle selection electromagnet, triangle electromagnet, yarn mouth electromagnet on straight-bar machines, can detect the status information of multi-channel electromagnet simultaneously.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within protection scope of the present invention.
Claims (4)
1. a 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 the electrical connection of straight-bar machines electromagnet, 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 straight-bar machines electromagnet by signal output interface, the described output terminal of reverse ratio circuit is electrically connected with the inverting input of voltage comparator circuit, the described output terminal of 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, described microprocessor and electric controller electrical connection, straight-bar machines electromagnet detecting unit also comprises warning circuit, described warning circuit is electrically connected with microprocessor, the inverting input of described reverse ratio circuit is electrically connected by on-off circuit with between signal output interface.
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+12V power supply and-24V power supply respectively, the normal phase input end of ratio amplifier U1 is by resistance R2 ground connection, the inverting input of ratio amplifier U1 is electrically connected with signal output interface by resistance R1, is connected with resistance R3 between the output terminal of ratio amplifier U1 and the inverting input of 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 and compares amplifier U2, relatively the power end of amplifier U2 connects+12V VDD-to-VSS respectively, relatively the normal phase input end of amplifier U2 is electrically connected with the output terminal of adjustable reference voltage source, and the inverting input comparing 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 described voltage comparator circuit, the output terminal comparing amplifier U2 is connected with+3.3V power supply by pull-up resistor R4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210588395.2A CN103076518B (en) | 2012-12-29 | 2012-12-29 | Straight-bar machines electromagnet state detection circuit |
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| CN201210588395.2A CN103076518B (en) | 2012-12-29 | 2012-12-29 | Straight-bar machines electromagnet state detection circuit |
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| CN103076518A CN103076518A (en) | 2013-05-01 |
| CN103076518B true CN103076518B (en) | 2016-01-20 |
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| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JP3656758B2 (en) * | 1991-05-08 | 2005-06-08 | 富士通株式会社 | Operating state detection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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