CN104111623A - Mechanical control equipment and protection circuit thereof - Google Patents
Mechanical control equipment and protection circuit thereof Download PDFInfo
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- CN104111623A CN104111623A CN201410267472.3A CN201410267472A CN104111623A CN 104111623 A CN104111623 A CN 104111623A CN 201410267472 A CN201410267472 A CN 201410267472A CN 104111623 A CN104111623 A CN 104111623A
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Abstract
The invention discloses mechanical control equipment and a protection circuit thereof. The mechanical control equipment comprises a control circuit, a drive circuit and an action element sequentially connected and sensing elements arranged at two ends of the stroke of the action element and the action object. Before the action element or the action object exceeds the stroke, the sensing elements are triggered by the action element or the action object to generate at least one path of signal output. One path of signal output of the at least one path of signal output passes through or does not pass through the control circuit to act on the enabled end of the drive circuit to enable the drive circuit to be closed. In the above mode, the phenomenon that the action element or the action object of the mechanical equipment exceeds the stroke can be avoided, and compared with the prior protection circuit by adopting a contactor, the cost is reduced.
Description
Technical field
The present invention relates to machine control techniques field, particularly a kind of machine control equipment and holding circuit thereof.
Background technology
Weaving device as knitting machine etc. be the equipment for knitted or woven fabrics, the lathe that it mainly comprises power circuit, operating case, main control board, head, motor, driver and said elements is installed.
Power circuit provides suitable power supply for main control board, head, motor.Head comprises the executive component for weaving.The core board of main control board receives weave data, resolves weave data, issues head by resolving the data that obtain after weave data through secondary host chip, drives the executive component of head to carry out knit operation.
For preventing unexpected generation, cause device damage or casualties, Weaving device is also provided with reliable holding circuit, not controlled and go out slide rail while preventing that head from moving to slide rail end on slide rail.Holding circuit comprises contactor and crashproof limit switch.The break-make of contactor control Weaving device general supply, comprises the break-make of controlling head board motor power supply.Crashproof limit switch is arranged at slide rail two ends.Not controlled and while being about to go out slide rail end, can first knock crashproof limit switch when head, trigger contactor and turn-off the power supply of machine head plate motor, realize protection reliably.
But, because contactor is expensive, cause the cost of holding circuit high.
Summary of the invention
The object of the present invention is to provide a kind of machine control equipment and holding circuit thereof, can avoid action element or the action object of machine control equipment to exceed stroke, and the holding circuit of relatively existing employing contactor, cost.
In order to solve the problems of the technologies described above, first aspect present invention provides a kind of machine control equipment, comprising: the control circuit, driving circuit and the action element that connect successively; Be arranged at the sensing element at described action element or its action object stroke two ends; Described sensing element is before described action element or its action object exceed described stroke, triggered and produced at least one road signal by described action element or its action object and exported, the Enable Pin of described driving circuit is exported through or acted on without described control circuit to a wherein road signal in the signal output of described at least one road, and described driving circuit cuts out.
Wherein, comprise the level shifting circuit being connected between described sensing element and driving circuit Enable Pin, described level shifting circuit is converted to the wherein road signal in the output of described at least one road signal the signal of the enable voltage requirement that can not meet described driving circuit Enable Pin, or because of the wherein effect no-output of a road signal in the output of described at least one road signal, described driving circuit cuts out.
Wherein, described level shifting circuit comprises controlled voltage source, the first resistance, the second resistance and photoelectrical coupler; Wherein, the Enable Pin of described controlled voltage source connects described sensing element, the output terminal of described controlled voltage source connects one end of described the first resistance, the other end of described the first resistance connects the input end of described photoelectrical coupler, the output terminal of described photoelectrical coupler connects described second resistance one end, the described second resistance other end connects described driving circuit Enable Pin, a wherein road signal in the signal output of described at least one road is high-voltage signal, trigger described controlled voltage source and close, and then make described photoelectrical coupler no-output.
Wherein, comprise distributed power source, described distributed power source comprises the first power circuit and is at least the second source circuit of described drive circuitry, described the first power circuit input external voltage, export at least two-way power supply output, wherein described at least one road, power supply output connects the input of described second source circuit, and the output of described second source circuit connects the Enable Pin of described driving circuit, the Enable Pin of described the first power circuit or described second source circuit enable sensing element described in termination.
Wherein, described level shifting circuit comprises first input end, the second input end and output terminal, and described control circuit connects the first input end of described level shifting circuit, and described sensing element connects the second input end of described level shifting circuit; The first level signal of described control circuit output in normal work is in the time transferring to described driving circuit Enable Pin through described level shifting circuit, and the voltage of described driving circuit Enable Pin meets the enable voltage requirement of described driving circuit Enable Pin; The second electrical level signal that described control circuit need to be shut down time output in judgement in the time transferring to described driving circuit Enable Pin through described level shifting circuit or described sensing element triggered and produced a described road signal by described action element or its action object in the time passing through described level shifting circuit and transfer to described driving circuit Enable Pin, all make the voltage of described driving circuit Enable Pin can not meet the enable voltage requirement of described driving circuit Enable Pin.
Wherein, described sensing element is triggered by described action element or its action object and the second electrical level signal that produces the output in the time that judgement need to be shut down of a described road signal and described control circuit is all high level signals or makes described driving circuit Enable Pin without input; the enable voltage of described driving circuit Enable Pin requires as high level signal; described level shifting circuit is OR-NOT circuit, and two input ends of described OR-NOT circuit, an output terminal are respectively first input end, the second input end, the output terminal of described level shifting circuit.
Wherein, comprise OR circuit, described sensing element quantity is two, lays respectively at described stroke two ends, described two sensing elements connect respectively two input ends of described OR circuit, and the output terminal of described OR circuit connects the second input end of described level shifting circuit.
Wherein, described machine control equipment is not containing the contactor of controlling power switch.
In order to solve the problems of the technologies described above, second aspect present invention provides a kind of holding circuit of machine control equipment to comprise: for being arranged at action element or at least sensing element of one end of its action object stroke of described machine control equipment; Described sensing element is before described action element or its action object exceed described stroke, triggered and produced at least one road signal by described action element or its action object and exported, a wherein road signal output in the output of described at least one road signal through or act on the Enable Pin of described driving circuit without the control circuit of described machine control equipment, described driving circuit cuts out.
Wherein, described holding circuit is realized by hardware circuit, and comprises for being connected in the level shifting circuit between described control circuit and driving circuit Enable Pin; Wherein, described level shifting circuit comprises first input end, the second input end and output terminal, and the first input end of described level shifting circuit is used for connecting described control circuit, and described sensing element connects the second input end of described level shifting circuit; When the first level signal of described control circuit output in normal work is transferred to described driving circuit Enable Pin by described level shifting circuit, the voltage of described driving circuit Enable Pin meets the enable voltage requirement of described driving circuit Enable Pin; When the second electrical level signal that described level shifting circuit need to be shut down time output by described control circuit in judgement transfers to described driving circuit Enable Pin or described sensing element triggered and produced a described road signal by described action element or its action object in the time passing through described level shifting circuit and transfer to described driving circuit Enable Pin, all make the voltage of described driving circuit Enable Pin can not meet the enable voltage requirement of described driving circuit Enable Pin.
The invention has the beneficial effects as follows: the holding circuit that is different from existing employing contactor; the present invention adopts sensing element to be arranged at least one end of stroke of action element or action object; and exceed before stroke at action element or action object; act on the Enable Pin of driving circuit by the output of sensing element triggering for generating, driving circuit cuts out, realize closing action element and action object; realize protection; meanwhile, this holding circuit element is simple, and cost reduces greatly.
Brief description of the drawings
Fig. 1 is the structural representation of machine control equipment of the present invention one embodiment;
Fig. 2 is the structural representation of another embodiment of motor device of the present invention;
Fig. 3 is the partial circuit schematic diagram of the control of machine shown in Fig. 2 equipment;
Fig. 4 is machine control equipment of the present invention partial circuit schematic diagram in an embodiment again;
Fig. 5 is the machine control equipment of the present invention structural representation of an embodiment more again.
Embodiment
Consult Fig. 1, Fig. 1 is the structural representation of machine control equipment of the present invention one embodiment.In present embodiment, machine control equipment 100 comprises successively control circuit 110, driving circuit 120, the action element 130 connecting and is arranged at the sensing element 140 at action element 130 stroke two ends, and driving circuit 120 comprises Enable Pin 121.Wherein, action element 130 is the element that produces action under the driving signal of driving circuit 120, as motor.The stroke of action element 130 is machine control equipment 100 while working, and default safe distance in the direction of action that action element produces is safe distance as the rotor of motor rotates half cycle.
In the time of normal work, control circuit 110 produces action according to the steering order control driving circuit 120 drive actions elements 130 that receive in its stroke.
Sensing element 140 is before action element 130 exceeds described stroke, triggered and produced at least one road signal by described action element 130 and exported, a wherein road signal output in the signal output of described at least one road acts on the Enable Pin 121 of described driving circuit 120 without described control circuit 110, described driving circuit 120 cuts out, as shown in Figure 1.
Or sensing element 130 is connected with control circuit 110.Sensing element 140 is before action element 130 exceeds described stroke, triggered and produced at least one road signal by described action element 130 and exported, a wherein road signal output in the signal output of described at least one road acts on the Enable Pin 121 of described driving circuit 120 through described control circuit 110, described driving circuit 120 cuts out.For example, this machine control equipment 100 is Weaving device, the secondary host chip that this control circuit 110 is Weaving device, and the servomotor of action element 130 for driving the head of Weaving device to move, action element 130 stroke two ends are provided with sensing element 140.In the time that one of them of two sensing elements 140 detects that action element 130 touches or detect that action element 130 is less than predeterminable range apart from sensing element 140, produce trigger pip.Control circuit 110 detects above-mentioned trigger pip in the two-way output signal of two sensing elements 140 that receive, input low voltage signal or stop the Enable Pin input signal to driving circuit 120 to the Enable Pin of driving circuit 120, to close driving circuit 120, make action element 130 in the time exceeding default safety travel, instant closing motion element 130.
Alternatively, machine control equipment also comprises the action object 150 of action element, and the action object 150 of this action element 130, for driven the element that action occurs by action element 130, as the head of Weaving device, is driven and realized knit operation by servomotor.The stroke of this action object 150 is this action object and drives the safe distance in the direction of action occurring at action element, for example, be the length of the slide rail at head place.Sensing element 140 also can not be arranged on action element 130 stroke two ends and be arranged on action object 150 stroke two ends.Sensing element 140 is before action object 150 exceeds described stroke, triggered and produced at least one road signal by action object 150 and exported, as touched sensing element 140 when action element 150, or during apart from sensing element predeterminable range, produce the signal output of at least one road, the Enable Pin 121 of described driving circuit 120 is exported through or acted on without described control circuit 110 to a wherein road signal in the signal output of described at least one road, described driving circuit 120 cuts out, action element 130 is closed immediately, action object that action element 130 drives is quit work as head, do not prevent head from slide rail, moving to slide rail end and controlled and go out slide rail.
Be understandable that, in different machine control apparatus embodiments, can not there is not its action object in action element, and now, sensing element only can be arranged on the stroke two ends of action element.
In addition, the quantity of sensing element can be one or more.Specifically, machine control equipment can all arrange two sensing elements as required as left and right sensing element at stroke two ends, be preferably left and right limit switch, or only on one side (one side that stability is not high), a sensing element is set.Optimally, in the time all sensing element being set at two ends, two sensing element output terminals can through logic element as or door, with door output after, remake the Enable Pin for driving circuit, as long as make a sensing element produce above-mentioned trigger pip, the output terminal of this logic element all can embody this trigger pip, if the trigger pip of sensing element is high voltage signal, be about to two sensing elements with or input end be connected, when ensureing that any sensing element produces high level signal, or the output of door can embody high level signal.
Distinguish existing employing contactor and realize protection; present embodiment machine control equipment is not containing the contactor of controlling power switch; adopt sensing element to control enabling of driving circuit; can realize equally and avoid action element or action object to exceed stroke; and then avoid device damage; and the holding circuit element of present embodiment is simple, cost adopts the scheme of contactor greatly to dwindle relatively.
Refer to Fig. 2 and Fig. 3, Fig. 2 is the structural representation of another embodiment of motor device of the present invention, and Fig. 3 is the partial circuit schematic diagram of the control of machine shown in Fig. 2 equipment.Specifically in above-mentioned embodiment, present embodiment sensing element 140, before the action object 150 of action element 130 exceeds stroke, is triggered and is produced a wherein road signal in the output of at least one road signal and act on without control circuit 110 Enable Pin 121 of driving circuit 120 by described action element 130 or its action object 150.Concrete machine control equipment 100 also comprises the level shifting circuit 160 being connected between sensing element 140 and the Enable Pin 121 of driving circuit 120.A wherein road signal in above-mentioned at least one road signal output that level shifting circuit 160 produces sensing element 140 is converted to the signal of the enable voltage requirement that can not meet described driving circuit Enable Pin 121, or because of the wherein effect no-output of a road signal in the output of described at least one road signal, as as described in the enable voltage of driving circuit Enable Pin 121 be low level signal, i.e. output signal not after being converted to high level signal or receiving the triggering for generating Yi road signal of sensing element, no longer enables driving circuit 120 and closes.
Specifically, in present embodiment, level shifting circuit 160 comprises controlled voltage source 161, the first resistance 162, the second resistance 163 and photoelectrical coupler 164.
Wherein, the Enable Pin 1611 of controlled voltage source 161 connects sensing element 140, the output terminal of controlled voltage source 161 connects one end of described the first resistance 162, the other end of the first resistance 162 connects the input end of described photoelectrical coupler 164, the output terminal of photoelectrical coupler 164 connects described second resistance 163 one end, and the other end 1631 of described the second resistance 163 connects the Enable Pin 121 of driving circuit 120.It is low voltage signal that sensing element 140 produces Yi road signal because action element 130 or action object 150 trigger.Controlled voltage source 161 enables for high voltage, when operation element 130 or action object 150 touch or approach sensing element 140 and in above-mentioned at least one road signal output of producing wherein a road signal is low-voltage signal time, trigger controlled voltage source 161 and close, and then make described photoelectrical coupler 164 no-outputs.The Enable Pin of driving circuit 120 is without input signal, therefore close driving circuit 120, realizes closing of action element that driving circuit is driven.
Alternatively, machine control equipment also comprises OR circuit 170.Sensing element 140 quantity are two, lay respectively at the stroke two ends of action element 130 or action object 150, two sensing elements 140 connect respectively two input ends of OR circuit 170, the output terminal of OR circuit 170 connects the input end of described level shifting circuit 160, with Enable Pin 1611 input signals to controlled source 161.Be understandable that, the sensing element 140 of this embodiment action element 130 or action object 150 is touched or approach and the signal of triggering for generating is high level signal, in the time being low level signal, can adopt AND circuit, or OR-NOT circuit realizes, to ensure that this gate circuit can embody the trigger pip of any sensing element 140, therefore do not do concrete restriction.
Refer to Fig. 4, Fig. 4 is machine control equipment of the present invention partial circuit schematic diagram in an embodiment again.The difference of present embodiment and a upper embodiment is, level shifting circuit 160 in present embodiment is OR-NOT circuit, level shifting circuit 160 comprises first input end 165, the second input end 166 and output terminal 167, control circuit 110 connects the first input end 165 of level shifting circuit 160, and sensing element 140 connects the second input end 166 of described level shifting circuit 160.And the output terminal 167 of this level shifting circuit connects the Enable Pin 121 of driving circuit.
Present embodiment, driving circuit Enable Pin 121 enables for high level.The first level signal of control circuit 110 output in normal work is in the time transferring to described driving circuit Enable Pin 121 through described level shifting circuit 160, and the voltage of described driving circuit Enable Pin 121 meets the enable voltage requirement of described driving circuit Enable Pin 121.Wherein, this first level signal can require to carry out specific definition according to the enable voltage of the circuit structure of level shifting circuit and driving circuit Enable Pin, as present embodiment, this first level signal is low level signal, and sensing element is not when detecting the touching of action element or action object or approaching, produce low level signal, export high level signal by level shifting circuit 160, to enable driving circuit, action element 130 is normally worked.
The second electrical level signal that control circuit 110 need to be shut down time output in judgement in the time transferring to described driving circuit Enable Pin 121 through described level shifting circuit 160 or described sensing element 140 triggered and produced a described road signal by described action element 130 or its action object 150 in the time transferring to described driving circuit Enable Pin 121 through described level shifting circuit 160, all make the voltage of described driving circuit Enable Pin 121 can not meet the enable voltage requirement of described driving circuit Enable Pin 121.
Wherein, control circuit 110 is judged as needs the condition of shutting down to exceed safe range for the sensing data of machine control equipment, as optimizing example, the input end of the control circuit 110 of present embodiment is connected with the output terminal of sensing element 140, in the time that sensing element produces above-mentioned trigger pip, control circuit 110 is judged as needs to shut down, to realize through and to act on without control circuit the duplicate protection mode of driving circuit Enable Pin, as long as there is above-mentioned a kind of protected mode to occur, close at once driving circuit, close the most fast driving circuit to realize, protection action element and action object thereof, even and a kind of protected mode breaks down and also can realize protection, improve the reliability of machine control equipment.
Specifically, the second electrical level signal of exporting when control circuit 110 judgements need to be shut down is relative with the first level signal, and the first level signal is low level signal, and second electrical level is high level signal.When control circuit 110 is exported high level signal, or sensing element 140 produces trigger pip, and when present embodiment is high level signal, the equal output low level signal of level shifting circuit 160, to close driving circuit 120.
Be understandable that, above-mentioned level shifting circuit may not be defined as OR-NOT circuit, also can be other gate circuits, specifically can require to adopt respective doors circuit according to the enable voltage of the trigger pip of sensing element and driving circuit, its cardinal rule is that sensing element is not in the time triggering and the first level signal inputted by control circuit, level shifting circuit output meets the enable voltage requirement of driving circuit, when sensing element is triggered or when control circuit input second electrical level signal, level shifting circuit output does not meet the enable voltage requirement of driving circuit, for example, in the time that not triggering, sensing element is output as low level signal, driving circuit is that low level is while enabling, adopt OR circuit, the first level signal of control circuit is low level, while making normally to work, level shifting circuit output low level enables driving circuit.When control circuit judges that needing shutdown output second electrical level signal be high level, or sensing element is when producing trigger pip and being high level signal, and level shifting circuit output high level, to close driving circuit.
Alternatively, when the quantity of sensing element 140 is two, lay respectively at the stroke two ends of action element 130 or action object 150, as be left and right limit switch, and when the trigger pip that sensing element 140 produces is high level signal, present embodiment also can adopt the OR circuit of an embodiment, to embody the trigger pip of any sensing element 140, is exporting the Enable Pin of driving circuit to.
Refer to 5, Fig. 5 and be the machine control equipment of the present invention part-structure schematic diagram of an embodiment more again.Be different from the embodiment shown in Fig. 1, in present embodiment, machine control equipment also comprises distributed power source 180.Described distributed power source 180 comprises the first power circuit 181 and is at least the second source circuit 182 that described driving circuit 121 is powered, and alternatively, is also included as the 3rd power circuit 183 of control circuit power supply.Described the first power circuit 181 is inputted external voltage, export at least two-way power supply output, wherein described at least one road, power supply is exported the input that connects described second source circuit 182, the output of described second source circuit 182 connects the Enable Pin 121 of described driving circuit, the Enable Pin 1811 of described the first power circuit 181 and/or the Enable Pin 1821 of described second source circuit 182 connect described sensing element 140, and the Enable Pin 1821 that is second source circuit 182 shown in Fig. 5 connects sensing element 140.
For example, the first power circuit 181 obtains external voltage as 220V alternating voltage, by the voltage signal of the adaptive machine control of the output multi-channels such as rectifying and wave-filtering equipment, as 110V voltage signal.Machine control equipment arranges multiplely exports with the first power circuit 181Ge road as father's power supply the power circuit being connected respectively, convert different voltage signals to the voltage signal that the first power circuit 181 is exported, as different sub-power circuits is converted to the signal such as 15V, 3.3V through 110V voltage signal respectively, and offer to element that need to this output voltage.Wherein, second source circuit 182, the 3rd power circuit 183 be also as sub-power circuit, is respectively driving circuit 120, control circuit 110 provides its required voltage.
The enable voltage of the first power circuit 181 or described second source circuit 182 is the voltage signal that sensing element 140 produces while not triggering, as is low voltage signal.When sensing element is due to action element 130 or action object 150 is touched or approach while producing trigger pip as high level signal, the first power circuit 181 or the second source circuit 182 that are connected with sensing element 140 are closed, make it stop powering to driving circuit 120, cause action element and action object shut-down operation.
In present embodiment, adopting multiple step format circuit, is sub-power supply using the function sharing that is converted to machine control equipment different elements required voltage as the first power circuit of father's power supply, greatly alleviates the workload of father's power circuit, has improved the efficiency of changing voltage.In addition, act on first and/or the Enable Pin of second source circuit by the trigger pip of sensing element, exceed before stroke at action element or action object, close the power supply of driving circuit, to realize closing motion element and action object thereof, realized protection.
In an embodiment, machine control equipment of the present invention is Weaving device, specifically comprises that power circuit is operating case, main control board, head, needle plate, motor.Power circuit, for operating case, main control board, head, motor provide suitable power supply, can be above-mentioned distributed power source.Main control board comprises base plate, core board and secondary host chip.This pair host chip, core board are fixed or are detachably arranged on base plate.Head comprises above-mentioned action element and the action object for weaving.Operating case comprises the display screen and the man-machine interaction circuit that are connected with core board.Core board receives the information such as the weave data of user's input, then resolves weave data, issues head by resolving the data that obtain after weave data through secondary host chip, drives action object to carry out knit operation with drive actions element.
Meanwhile, main control board is also controlled the various operations of other elements of Weaving device, gathers various operating state datas, sensing data etc. and exports to external unit such as the display screen on operating case.Specifically, the core board of main control board is transferred to the demonstration screen display of operating case by the data that collect by showing data line, the instruction that man-machine interaction circuit is inputted acquisition user, and instruction is passed to core board by data line and carry out respective handling.
Be understandable that, above-mentioned core board also can not be arranged on the base plate of main control board as be arranged in operating case, and core board and base plate removably connect by general-purpose interface, and by the described secondary host chip of described base plate connection.Wherein, core board is arranged in operating case, has shortened the communication distance of core board and display screen and man-machine interaction circuit, without adopting data line mode to connect, thereby can reduce loss and communication interference.
In one of them embodiment of the present invention, machine control equipment comprises first circuit board and the second circuit board of distributed setting as Weaving device, wherein on first circuit board, be provided with AC/DC change-over circuit, AC/DC change-over circuit converts the alternating voltage of reception to first DC voltage, first circuit board and second circuit board are respectively arranged with DC/DC change-over circuit, the first DC voltage is supplied to respectively the DC/DC change-over circuit on first circuit board and second circuit board, and converts the second required separately DC voltage to by DC/DC change-over circuit.By with upper type, the present invention can avoid power supply assembly is additionally set, and greatly reduces the complexity of supply line.
In wherein another embodiment of the present invention, also provide machine control equipment as the Poewr control method between at least two action elements in Weaving device, the method comprises: the control system of controlling at least two action elements is obtained steering order; Whether resolve steering order performs an action within least part of time for controlling at least two action elements simultaneously; If steering order is moved for controlling at least two action elements simultaneously, the execution time of the action of at least two action elements is staggered each other, make the implementation effect of at least two action elements meet the demands simultaneously.By with upper type, real power when embodiment of the present invention can avoid at least two action elements to move is simultaneously excessive, significantly reduce power consumption, particularly, under the scene for the more action element of controlling the size simultaneously, power saving effect is obvious especially.
The present invention also provides a kind of embodiment of holding circuit of machine control equipment, and this holding circuit comprises: for being arranged at action element or at least sensing element of one end of its action object stroke of described machine control equipment.
Described sensing element is before described action element or its action object exceed described stroke, triggered and produced at least one road signal by described action element or its action object and exported, a wherein road signal output in the output of described at least one road signal through or act on the Enable Pin of described driving circuit without the control circuit of described machine control equipment, described driving circuit cuts out.
The sensor circuit of present embodiment, control circuit, driving circuit and above sensing element, control circuit, the driving circuit of embodiment, three's concrete annexation and specific implementation process refer to embodiment and Fig. 1-5 above, and therefore not to repeat here.
Particularly, described holding circuit is realized by hardware circuit, and comprises for being connected in the level shifting circuit between described control circuit and driving circuit Enable Pin.Wherein, the concrete as level shifting circuit in embodiment above of this level shifting circuit.
For example, level shifting circuit comprises first input end, the second input end and output terminal, and the first input end of described level shifting circuit is used for connecting described control circuit, and described sensing element connects the second input end of described level shifting circuit.
When the first level signal of described control circuit output in normal work is transferred to described driving circuit Enable Pin by described level shifting circuit, the voltage of described driving circuit Enable Pin meets the enable voltage requirement of described driving circuit Enable Pin.
When the second electrical level signal that described level shifting circuit need to be shut down time output by described control circuit in judgement transfers to described driving circuit Enable Pin or described sensing element triggered and produced a described road signal by described action element or its action object in the time passing through described level shifting circuit and transfer to described driving circuit Enable Pin, all make the voltage of described driving circuit Enable Pin can not meet the enable voltage requirement of described driving circuit Enable Pin.
In another embodiment of holding circuit, this holding circuit can comprise the distributed power source of embodiment above, does not also repeat at this.
It should be noted that, above-mentioned embodiment is only given an example with Weaving device, but machine control circuit of the present invention also can be other automation equipments, as numerically-controlled machine etc.
Pass through such scheme; adopt sensing element to be arranged at least one end of stroke of action element or action object; and exceed before stroke at action element or action object; act on the Enable Pin of driving circuit by the output of sensing element triggering for generating, driving circuit cuts out, realize closing action element and action object; realize protection; meanwhile, this holding circuit element is simple, and cost reduces greatly.
The foregoing is only embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a machine control equipment, is characterized in that, comprising:
The control circuit, driving circuit and the action element that connect successively;
Be arranged at the sensing element at described action element or its action object stroke two ends;
Described sensing element is before described action element or its action object exceed described stroke, triggered and produced at least one road signal by described action element or its action object and exported, the Enable Pin of described driving circuit is exported through or acted on without described control circuit to a wherein road signal in the signal output of described at least one road, and described driving circuit cuts out.
2. machine control equipment according to claim 1, is characterized in that,
Comprise the level shifting circuit being connected between described sensing element and driving circuit Enable Pin, described level shifting circuit is converted to the wherein road signal in the output of described at least one road signal the signal of the enable voltage requirement that can not meet described driving circuit Enable Pin, or because of the wherein effect no-output of a road signal in the output of described at least one road signal, described driving circuit cuts out.
3. machine control equipment according to claim 2, is characterized in that,
Described level shifting circuit comprises controlled voltage source, the first resistance, the second resistance and photoelectrical coupler;
Wherein, the Enable Pin of described controlled voltage source connects described sensing element, the output terminal of described controlled voltage source connects one end of described the first resistance, the other end of described the first resistance connects the input end of described photoelectrical coupler, the output terminal of described photoelectrical coupler connects described second resistance one end, the described second resistance other end connects described driving circuit Enable Pin, a wherein road signal in the signal output of described at least one road is high-voltage signal, trigger described controlled voltage source and close, and then make described photoelectrical coupler no-output.
4. machine control equipment according to claim 1, is characterized in that,
Comprise distributed power source, described distributed power source comprises the first power circuit and is at least the second source circuit of described drive circuitry, described the first power circuit input external voltage, export at least two-way power supply output, wherein described at least one road, power supply is exported the input that connects described second source circuit, the output of described second source circuit connects the Enable Pin of described driving circuit, the Enable Pin of described the first power circuit or described second source circuit enable sensing element described in termination.
5. machine control equipment according to claim 2, is characterized in that,
Described level shifting circuit comprises first input end, the second input end and output terminal, and described control circuit connects the first input end of described level shifting circuit, and described sensing element connects the second input end of described level shifting circuit;
The first level signal of described control circuit output in normal work is in the time transferring to described driving circuit Enable Pin through described level shifting circuit, and the voltage of described driving circuit Enable Pin meets the enable voltage requirement of described driving circuit Enable Pin;
The second electrical level signal that described control circuit need to be shut down time output in judgement in the time transferring to described driving circuit Enable Pin through described level shifting circuit or described sensing element triggered and produced a described road signal by described action element or its action object in the time passing through described level shifting circuit and transfer to described driving circuit Enable Pin, all make the voltage of described driving circuit Enable Pin can not meet the enable voltage requirement of described driving circuit Enable Pin.
6. machine control equipment according to claim 5, is characterized in that,
Described sensing element is triggered by described action element or its action object and the second electrical level signal that produces the output in the time that judgement need to be shut down of a described road signal and described control circuit is all high level signals or makes described driving circuit Enable Pin without input; the enable voltage of described driving circuit Enable Pin requires as high level signal; described level shifting circuit is OR-NOT circuit, and two input ends of described OR-NOT circuit, an output terminal are respectively first input end, the second input end, the output terminal of described level shifting circuit.
7. machine control equipment according to claim 6, is characterized in that,
Comprise OR circuit, described sensing element quantity is two, lay respectively at described stroke two ends, described two sensing elements connect respectively two input ends of described OR circuit, and the output terminal of described OR circuit connects the second input end of described level shifting circuit.
8. according to the machine control equipment described in claim 1 to 7 any one, it is characterized in that,
Described machine control equipment is not containing the contactor of controlling power switch.
9. a holding circuit for machine control equipment, is characterized in that, comprising:
For being arranged at action element or at least sensing element of one end of its action object stroke of described machine control equipment;
Described sensing element is before described action element or its action object exceed described stroke, triggered and produced at least one road signal by described action element or its action object and exported, a wherein road signal output in the output of described at least one road signal through or act on the Enable Pin of described driving circuit without the control circuit of described machine control equipment, described driving circuit cuts out.
10. holding circuit according to claim 9, is characterized in that,
Described holding circuit is realized by hardware circuit, and comprises for being connected in the level shifting circuit between described control circuit and driving circuit Enable Pin;
Wherein, described level shifting circuit comprises first input end, the second input end and output terminal, and the first input end of described level shifting circuit is used for connecting described control circuit, and described sensing element connects the second input end of described level shifting circuit;
When the first level signal of described control circuit output in normal work is transferred to described driving circuit Enable Pin by described level shifting circuit, the voltage of described driving circuit Enable Pin meets the enable voltage requirement of described driving circuit Enable Pin;
When the second electrical level signal that described level shifting circuit need to be shut down time output by described control circuit in judgement transfers to described driving circuit Enable Pin or described sensing element triggered and produced a described road signal by described action element or its action object in the time passing through described level shifting circuit and transfer to described driving circuit Enable Pin, all make the voltage of described driving circuit Enable Pin can not meet the enable voltage requirement of described driving circuit Enable Pin.
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| CN201410267472.3A CN104111623B (en) | 2014-06-16 | 2014-06-16 | Mechanical control equipment and protection circuit thereof |
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| CN104111623B CN104111623B (en) | 2017-03-22 |
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| CN104111623B (en) | 2017-03-22 |
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