CN103728878A - Over-rotation protection circuit - Google Patents

Over-rotation protection circuit Download PDF

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Publication number
CN103728878A
CN103728878A CN201410010651.9A CN201410010651A CN103728878A CN 103728878 A CN103728878 A CN 103728878A CN 201410010651 A CN201410010651 A CN 201410010651A CN 103728878 A CN103728878 A CN 103728878A
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China
Prior art keywords
counter
rotation
hall element
protection circuit
preset
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CN201410010651.9A
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Chinese (zh)
Inventor
彭建新
赵坤伟
刘成轩
费忠明
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SICHUAN TEXTILE RESEARCH INSTITUTE
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SICHUAN TEXTILE RESEARCH INSTITUTE
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Priority to CN201410010651.9A priority Critical patent/CN103728878A/en
Publication of CN103728878A publication Critical patent/CN103728878A/en
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Abstract

The invention discloses an over-rotation protection circuit. Two counters which are interlocked automatically identify forward rotation and backward rotation to compute the number of pulses from a hall sensor, once the number of the pulses exceeds a preset number of a four-digital dial switch (6), a contactor (3) losses power through an optocoupler and a relay (2) and accordingly a device is halted. The over-rotation protection circuit has the advantages of achieving identification of forward rotation and backward rotation, forward rotation and backward rotation count in a time sharing mode and forward rotation and backward rotation mutual count through orthogonal (double hall switches) pulses, effectively protecting forward rotation and backward rotation caused by any reason and being simple, practical and stable.

Description

A kind of rotation protection circuit of crossing
Technical field
The present invention relates to the rotation protection technology of crossing of reciprocating rotary equipment, particularly the reciprocating rotary system of open loop control or the second protection measure of closed-loop system.
Background technology
The equipment of some reciprocating rotaries (enter to be greater than and move back) work, when protecting design, should differentiate sense of rotation, differentiates again this sense of rotation and has turned round how much turn (angle), and this has just caused very large difficulty to designer.And, once this kind equipment is made mistakes and is very easily caused personal injury under open loop is controlled.If the softener of ramie textile industry is after changing hydrostatic transmission into, although significantly reduced failure rate, maintenance maintenance expense, if under open loop controlled condition, once break down, operating personnel are very easily injured.
Prior art, what sense of rotation was judged is more.As disclosed in CN201020573463.4 " a kind of detection motor turns to cubing ", CN201110289914.0 disclosed " a kind of motor speed based on FPGA and turn to pick-up unit ", CN200910150672.X disclosed " steering detection method and steering detection circuit " all has turning to offering of identification.And counting aspect is innumerable especially.But can carry out rotating judgement simultaneously, respectively counter is rarely seen.
Summary of the invention
The present invention utilizes quadrature (Hall element 5) pulse realize rotating identification, rotating time-sharing counting and put mutually mutually number, and its core is to produce the pulse signal that tool covers (90 °) phase differential mutually.The positive and negative mistake no matter which kind of reason causes turns, and this circuit all can effectively be protected.
Cross a rotation protection circuit, by the zero clearing of two counters
Figure BDA0000455285030000011
end and CET connect often " 1 ", and the CP that the output of the first Hall element (5A) is connect respectively to the first counter (4A) holds and the second counter (4B) preset
Figure BDA0000455285030000012
end, the EP end enabling, and the output of the second Hall element (5B) is connect respectively to the preset of the CP end of the second counter (4B) and the first counter (4A)
Figure BDA0000455285030000021
end, the EP end enabling; The output termination optocoupler (1A, 1B) of two counters (4A, 4B); On reciprocating member running circumference, even subsides are less than or equal to 16 magnetic sheets (7), and ensure the induction region of two Hall elements that each magnetic sheet (7) can successively streak and tie, and magnetic sheet (7) keeps certain interval with two Hall elements; Two counter interlockings, automatically identify rotating and calculate respectively the umber of pulse from Hall element, once surpass the preset number of 4-bit DIP switch (6), by optocoupler, relay (2), make contactor (3) thereby the work of dead electricity arrestment.
The described rotation protection circuit of crossing, magnetic sheet (7) always successively streaks the Hall element of two parallel combinations, produces the pulse signal of 90 ° of phase differential with mutual covering.
Forward [suppose that Hall element 5A is front, suppose that Hall element 5B is rear], at T in the cycle:
During t1～t3, without rising edge " ↑ ", counter 4A awaits orders.
The t3 moment, when A ripple rising edge " ↑ " comes, EP ain electronegative potential, counter 4A does not count; While LD ain electronegative potential, to counter, 4A puts number.
During t3～t4, A ripple is got back to noble potential, EP bget back to noble potential, without rising edge " ↑ ", counter is awaited orders.
The t4 moment, when B ripple rising edge " ↑ " comes, EP bin noble potential, counter 4B counting.
Reversion [suppose that Hall element 5B is front, suppose that Hall element 5A is rear], at T in the cycle:
During t1～t3, without rising edge " ↑ ", counter is awaited orders.
The t3 moment, when B ripple rising edge " ↑ " comes, EP bin electronegative potential, counter 4B does not count; LD bin electronegative potential, to counter, 4B puts number.
The t4 moment, when A ripple rising edge " ↑ " comes, EP ain noble potential, counter 4A counting.
The present invention utilizes quadrature (two Hall switch) pulse realize rotating identification, rotating time-sharing counting and mutually put number.The positive and negative mistake no matter which kind of reason causes turns, and this circuit all can effectively be protected.Simply, practical, stable.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention, with dotted line, is divided into " A ", " B " two parts, optocoupler 1A, 1B, counter 4A, 4B, Hall element 5A, 5B, 4- bit DIP switch 6A, 6B; Relay 2, contactor 3.
Fig. 2 is signal station figure of the present invention: 5 Hall elements, 7 magnetic sheets.
Fig. 3 is wave analysis figure of the present invention, and in figure: A ripple is the pulse signal (Hall element on the left side in Fig. 1) of Hall element 5A, B ripple is the pulse signal (Hall element on the right in Fig. 1) of Hall element 5B, EP afor the EP end oscillogram of counter A, EP beP end oscillogram for counter B.
Embodiment
As Fig. 1: the present invention utilizes counter 4(as 74LS161) zero clearing
Figure BDA0000455285030000031
end, preset
Figure BDA0000455285030000032
when end, the EP end that enables (permission) and CET end are " 1 ", at CP end, obtain the feature that rising pulse " ↑ " can be counted, by the zero clearing of left and right two counters 4
Figure BDA0000455285030000033
end and CET connect often " 1 ", and the CP that the output of Hall element 5A is met respectively to counter 4A holds and counter 4B preset
Figure BDA0000455285030000034
end, enable the EP end of (permissions), and the CP that the output of Hall element 5B meets respectively counter 4B is held and counter 4A preset
Figure BDA0000455285030000035
hold, enable the EP end of (permission).
Output termination optocoupler 1A, the optocoupler 1B of two counter 4A, 4B, to keep away the interference of outer bound pair counter 4A, 4B and to amplify control signal, thereby then drive relay 2 further to amplify control signal, to control the break-make of the contactor of motor.
As Fig. 2, according to control accuracy, on reciprocating member running circumference, even subsides are less than or equal to 16 magnetic sheets 7, and ensure the induction region of two Hall elements 5 that each magnetic sheet 7 can successively streak and tie, and magnetic sheet 7 and two Hall elements 5 keep certain interval.
Counter 4A of the present invention, 4B be also down counter of up counter both.As use down counter, can direct preset 4-bit DIP switch 6 be permission number of signals; Use up counter, in practical process, should use the thinking of the preset truth of a matter, take and 16 deduct that to allow the number of signals turning over be the preset number of 4-bit DIP switch 6.If allow, turn over 8 signals, 16-8=8, that is: P 3p 2p 1p 0=1000.
Forward [suppose that Hall element 5A is front, suppose that Hall element 5B is rear], at T in the cycle:
During t1～t3, without rising edge " ↑ ", two counters 4 are awaited orders.
The t3 moment, when A ripple rising edge " ↑ " comes, EP ain electronegative potential, counter 4A does not count; While LD ain electronegative potential, to counter, 4A puts number.
During t3～t4, A ripple is got back to noble potential, EP bget back to noble potential, without rising edge " ↑ ", do not work.
The t4 moment, when B ripple rising edge " ↑ " comes, EP bin noble potential, counter 4B counting.
Reversion, at T in the cycle:
During t1～t3, without rising edge " ↑ ", two counters 4 are awaited orders.
The t3 moment, when B ripple rising edge " ↑ " comes, EP bin electronegative potential, counter 4B does not count; LD bin electronegative potential, to counter, 4B puts number.
The t4 moment, when A rising edge " ↑ " comes, EP ain noble potential, counter 4A counting.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.

Claims (2)

1. cross a rotation protection circuit, it is characterized in that, by the zero clearing of two counters
Figure FDA0000455285020000011
end and CET connect often " 1 ", and the CP that the output of the first Hall element (5A) is connect respectively to the first counter (4A) holds and the second counter (4B) preset
Figure FDA0000455285020000012
end, the EP end enabling, and the output of the second Hall element (5B) is connect respectively to the preset of the CP end of the second counter (4B) and the first counter (4A)
Figure FDA0000455285020000013
end, the EP end enabling; The output termination optocoupler (1A, 1B) of two counters (4A, 4B); On reciprocating member running circumference, even subsides are less than or equal to 16 magnetic sheets (7), and ensure the induction region of two Hall elements that each magnetic sheet (7) can successively streak and tie, and magnetic sheet (7) keeps certain interval with two Hall elements; Two counter interlockings, automatically identify rotating and calculate respectively the umber of pulse from Hall element, once surpass the preset number of 4-bit DIP switch (6), by optocoupler, relay (2), make contactor (3) thereby the work of dead electricity arrestment.
2. cross according to claim 1 rotation protection circuit, it is characterized in that, magnetic sheet (7) always successively streaks the Hall element of two parallel combinations, produces the pulse signal of 90 ° of phase differential with mutual covering.
CN201410010651.9A 2014-01-10 2014-01-10 Over-rotation protection circuit Pending CN103728878A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2053741U (en) * 1988-03-08 1990-02-28 陈源 Automatic length counter
CN200970622Y (en) * 2006-11-27 2007-11-07 魏彦卯 Pattered wire net forming machine
CN101459402A (en) * 2007-12-14 2009-06-17 株式会社瑞萨科技 Motor drive apparatus
CN201466953U (en) * 2009-06-29 2010-05-12 王金友 Rotating shaft revolution detection device for a rotating shaft motor and rotating shaft motor using same
CN202002858U (en) * 2011-04-01 2011-10-05 深圳市大地和电气有限公司 Hall velocity measurement device
CN102426267A (en) * 2011-10-11 2012-04-25 三一重工股份有限公司 Rotation detection device and engineering machinery
CN102678008A (en) * 2012-05-31 2012-09-19 北京航空航天大学 Self-adapting car window anti-clamping control circuit and control method
CN103018474A (en) * 2011-09-27 2013-04-03 上海航天控制工程研究所 FPGA (Field Programmable Gata Array)-based motor speed and rotating direction detecting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2053741U (en) * 1988-03-08 1990-02-28 陈源 Automatic length counter
CN200970622Y (en) * 2006-11-27 2007-11-07 魏彦卯 Pattered wire net forming machine
CN101459402A (en) * 2007-12-14 2009-06-17 株式会社瑞萨科技 Motor drive apparatus
CN201466953U (en) * 2009-06-29 2010-05-12 王金友 Rotating shaft revolution detection device for a rotating shaft motor and rotating shaft motor using same
CN202002858U (en) * 2011-04-01 2011-10-05 深圳市大地和电气有限公司 Hall velocity measurement device
CN103018474A (en) * 2011-09-27 2013-04-03 上海航天控制工程研究所 FPGA (Field Programmable Gata Array)-based motor speed and rotating direction detecting device
CN102426267A (en) * 2011-10-11 2012-04-25 三一重工股份有限公司 Rotation detection device and engineering machinery
CN102678008A (en) * 2012-05-31 2012-09-19 北京航空航天大学 Self-adapting car window anti-clamping control circuit and control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
庞研: "某系统电机保护器的硬件电路设计浅谈", 《科技创新与应用》, 18 October 2013 (2013-10-18), pages 64 *

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