CN201607639U - Anti-interference input and output circuit for control system of numerical control cutting machine - Google Patents
Anti-interference input and output circuit for control system of numerical control cutting machine Download PDFInfo
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- CN201607639U CN201607639U CN2009202358260U CN200920235826U CN201607639U CN 201607639 U CN201607639 U CN 201607639U CN 2009202358260 U CN2009202358260 U CN 2009202358260U CN 200920235826 U CN200920235826 U CN 200920235826U CN 201607639 U CN201607639 U CN 201607639U
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Abstract
The utility model discloses an anti-interference input and output circuit for a control system of a numerical control cutting machine, which comprises an analog quantity isolating circuit, a logical quantity isolation amplification output circuit, a logical quantity isolation input circuit and a high-frequency differential signal isolation input circuit, wherein the analog quantity isolating circuit comprises an isolation amplifier and a signal amplifier which are connected with each other; the logical quantity isolation amplification output circuit comprises a first optoelectronic isolator and a driving power tube; the logical quantity isolation input circuit comprises a second optoelectronic isolator, a schmidt NOT gate circuit and an inverting circuit filter shaping output circuit; the high-frequency differential signal isolation input circuit comprises a differential signal receiver and a high-frequency optical coupling isolator; and the differential signal receiver is connected with the high-frequency optical coupling isolator. The insides of the output and input circuits are both provided with optoelectronic isolating circuits so that the control circuit so as to make a control circuit isolated from the field, prevent interference of field electromagnetic interference for the control circuit, guarantee the stability of the control circuit and enable the numerical control cutting machine to work normally.
Description
Technical field
The utility model relates to a kind of imput output circuit, particularly a kind of anti-tampering imput output circuit of control system of numerical control cutting machine.
Background technology
In mechanical processing process, sheet material cutting usual way has hand cut, semi auto cutting machine cutting and numerical control cutting machine cutting.Hand cut is flexible, but hand cut is of poor quality, scale error is big, waste of material is big, the following process workload is big, and working condition is abominable simultaneously, and production efficiency is low.Copying cutting machine in the semi auto cutting machine, the quality of cut workpiece is better, because it uses cutting die, is not suitable for single-piece, short run and big work piece cut.Though other type semi auto cutting machine has reduced labor strength, its function is simple, only is fit to some part cuttings than regular shape.The manual relatively and semi-automatic cutting mode of NC cutting can improve sheet material cutting ground efficient, cut quality effectively, alleviate operator ground labour intensity, so numerical control cutting machine is widely used more and more.
In the plasma cutting is used, cutting machine has strong electromagnetic interference (EMI) with cutting power supply to other consumers, and its applied environment is also often relatively abominable, there is very big electromagnetic interference (EMI), this just requires computer control system to have very high antijamming capability, high-frequency arc strike in the time of can resisting the plasma striking disturbs, and the interference of plasma arc in the time of also resisting work can also be resisted other interference sources of working site.In addition because computer control system had often both comprised that the light current control section also comprised the heavy-current control part, for guaranteeing the stable and personal security of equipment work, require observing and controlling and the on-the-spot circulation that only has control information, the contact of electricity does not directly take place, realize the electrical isolation of light current and strong power part, the imput output circuit of existing cutting machine control system is difficult to reach above-mentioned requirements.
The utility model content
At above-mentioned the deficiencies in the prior art, the technical problems to be solved in the utility model provides a kind of circuit of input and output of new numerical control cutting machine, this circuit has anti-interference function preferably, can effectively guarantee the stability of control system of numerical control cutting machine, guarantees its operate as normal.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of anti-tampering imput output circuit of control system of numerical control cutting machine, it comprises: the analog quantity buffer circuit, comprise an isolated amplifier and a signal amplifier, described isolated amplifier is connected with described signal amplifier, simulating signal is isolated through described isolated amplifier 1: 1 and is amplified, and the voltage follower buffer compartment that constitutes through amplifier is from output again; Amount of logic is isolated amplification output circuit, comprise one first photoisolator and a driving power pipe, described first photoisolator is connected with described driving power pipe, and described driving power Guan Yuyi pilot lamp connects, and output signal is controlled the switch of described driving power pipe by photoisolator; Amount of logic is isolated input circuit, comprise second photoisolator, Schmidt's not circuit and a negater circuit filter shape output circuit, described second photoisolator is connected with described Schmidt's not circuit, and described Schmidt's not circuit is connected with described negater circuit filter shape output circuit; The high frequency difference frequency sub-signal is isolated input circuit, comprise a differential receiver and a high frequency optical coupling isolator, described differential receiver is connected with described high frequency optical coupling isolator, and differential signal is directly inputted to differential receiver and converts pulse signal to, again through exporting behind the high frequency optical coupling isolator.
Technique scheme has following beneficial effect: be equipped with photoelectric isolating circuit in above-mentioned output input circuit, isolated thereby make between control circuit and the scene, prevent of the interference of on-the-spot electromagnetic interference (EMI) to control circuit, guarantee the stability of control circuit, numerical control cutting machine can be worked normally.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, below with preferred embodiment of the present utility model and conjunction with figs. describe in detail as after.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the circuit diagram of analog quantity buffer circuit.
Fig. 2 isolates the circuit diagram of amplification output circuit for amount of logic.
Fig. 3 isolates the circuit diagram of input circuit for amount of logic.
Fig. 4 isolates the circuit diagram of input circuit for the high frequency difference frequency sub-signal.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail.
The anti-tampering imput output circuit of this control system of numerical control cutting machine comprises that analog quantity buffer circuit, amount of logic are isolated amplification output circuit, amount of logic isolates input circuit and the high frequency difference frequency sub-signal is isolated input circuit.As shown in Figure 1, the analog quantity buffer circuit comprises an isolated amplifier ISO122JP, and 1 pin of this isolated amplifier ISO122JP and 2 pin are respectively by a capacitor C 8, C9 ground connection.7 pin of isolated amplifier ISO122JP are connected with 3 pin of signal amplifier LF347 by a resistance R 1, and 2 pin of LF347 are connected with its 1 pin, and 1 pin of LF347 is connected with a resistance R 20.In this circuit, simulating signal carries out isolate amplifying at 1: 1 through described isolated amplifier ISO122JP, and the voltage follower buffer compartment that constitutes through amplifier LF347 is from back output again, realizes the isolation at input signal and scene.
As shown in Figure 2, the circuit diagram of isolating amplification output circuit for amount of logic, this circuit comprises the first photoisolator U20,1 pin of the first photoisolator U20 is connected with one+5V direct supply, 2 pin of the first photoisolator U20 are connected with a resistance R P21A, and 15 pin of the first photoisolator U20 are connected with one+24V power supply by a RP22A, and the 16 pin driving power pipe Q9 of the first photoisolator U20 connect, the grid of driving power pipe Q9, the drain electrode of Q9 connects output indicator LED20 and load.Input signal is at first isolated the switch that the grid of controlling Q9 is again realized pilot lamp LED20 and load by photoelectricity.
As shown in Figure 3, this amount of logic is isolated input circuit and is comprised the second photoisolator U23A, 1 pin of the second photoisolator U23A is connected with a 24V power supply, its 2 pin is connected with a resistance R 33A, 15 pin of the second photoisolator U23A are connected with one+5V power supply by a resistance R 34A, also be connected with 1 pin of Schmidt's not circuit U27A by a resistance R 35A, this Schmidt's not circuit adopts the 74HC14 chip, 2 pin of Schmidt's not circuit U27A are connected with 1 pin of a negater circuit filter shape output circuit kind amplifier U28A, U28A is the 74LS04 chip, 2 pin of amplifier U28A are output terminal, this output terminal also is provided with a display led 25, and this LED25 is connected with a positive supply by a resistance R 48A.
As shown in Figure 4, this high frequency difference frequency sub-signal is isolated input circuit and is comprised a differential receiver U8A, 1,3 pin of differential receiver U8A are connected with input signal, 6 pin of differential receiver U8A are connected with 4 pin of high frequency optical coupling isolator U30,2,3 pin of high frequency optical coupling isolator U30 more are connected the 6 pin position output terminals of high frequency optical coupling isolator U30 by a resistance R 2A, R2B with power supply.Differential signal is directly inputted to differential receiver U8A and converts pulse signal in this circuit, again through exporting behind the high frequency optical coupling isolator U30.
In above-mentioned output input circuit, be equipped with photoelectric isolating circuit, isolated, prevent of the interference of on-the-spot electromagnetic interference (EMI), guarantee the stability of control circuit, numerical control cutting machine can be worked normally control circuit thereby make between control circuit and the scene.
In order further to strengthen the antijamming capability of this circuit, also can adopt following method:
1) circuit is divided into six layers of pcb board wiring, 4 layer signal layers, 2 layers of bus plane, at bus plane, multiple power supplies is cut apart, and strengthens anti-interference.
2) external interface aviation plug, the electromagnetic screen ability and the anticorrosive oxidation resistance of enhancing interface are durable in use.
3) all external interface has all been gone here and there magnetic core reactor, connects filter capacitor over the ground, the antijamming capability extra-heavy.
4) adopt two groups of multi-channel dc power supply power supplies, input circuit and output circuit, internal circuit and external circuit realize that electricity is isolated completely.
More than a kind of major part that is equipped with in the input circuit in the photoelectric isolating circuit of exporting that the utility model embodiment is provided introduce; some other common circuit is a techniques well known; for one of ordinary skill in the art; thought according to the utility model embodiment; in the embodiment part that all can change; in sum; this description should not be construed as restriction of the present utility model, and all any changes of being made according to the utility model design philosophy are all within protection domain of the present utility model.
Claims (1)
1. the anti-tampering imput output circuit of a control system of numerical control cutting machine, it is characterized in that, it comprises the analog quantity buffer circuit, comprise an isolated amplifier and a signal amplifier, described isolated amplifier is connected with described signal amplifier, simulating signal is isolated through described isolated amplifier 1: 1 and is amplified, and the voltage follower buffer compartment that constitutes through amplifier is from output again;
Amount of logic is isolated amplification output circuit, comprise one first photoisolator and a driving power pipe, described first photoisolator is connected with described driving power pipe, and described driving power Guan Yuyi pilot lamp connects, and output signal is controlled the switch of described driving power pipe by photoisolator;
Amount of logic is isolated input circuit, comprise second photoisolator, Schmidt's not circuit and a negater circuit filter shape output circuit, described second photoisolator is connected with described Schmidt's not circuit, and described Schmidt's not circuit is connected with described negater circuit filter shape output circuit;
The high frequency difference frequency sub-signal is isolated input circuit, comprise a differential receiver and a high frequency optical coupling isolator, described differential receiver is connected with described high frequency optical coupling isolator, and differential signal is directly inputted to differential receiver and converts pulse signal to, again through exporting behind the high frequency optical coupling isolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202358260U CN201607639U (en) | 2009-10-12 | 2009-10-12 | Anti-interference input and output circuit for control system of numerical control cutting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202358260U CN201607639U (en) | 2009-10-12 | 2009-10-12 | Anti-interference input and output circuit for control system of numerical control cutting machine |
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| Publication Number | Publication Date |
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| CN201607639U true CN201607639U (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202358260U Expired - Fee Related CN201607639U (en) | 2009-10-12 | 2009-10-12 | Anti-interference input and output circuit for control system of numerical control cutting machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576597A (en) * | 2012-07-24 | 2014-02-12 | 施耐德电器工业公司 | Digital quantity input interface device, programmable logic controller comprising digital quantity input interface device and method of digital quantity input interface device |
| CN104570958A (en) * | 2015-02-04 | 2015-04-29 | 湖南天冠电子信息技术有限公司 | Cnc cooperative control device and numerical control system |
| CN104914788A (en) * | 2015-06-29 | 2015-09-16 | 遵义宏港机械有限公司 | External numerical control milling machine intelligent coding control system |
-
2009
- 2009-10-12 CN CN2009202358260U patent/CN201607639U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576597A (en) * | 2012-07-24 | 2014-02-12 | 施耐德电器工业公司 | Digital quantity input interface device, programmable logic controller comprising digital quantity input interface device and method of digital quantity input interface device |
| CN104570958A (en) * | 2015-02-04 | 2015-04-29 | 湖南天冠电子信息技术有限公司 | Cnc cooperative control device and numerical control system |
| CN104914788A (en) * | 2015-06-29 | 2015-09-16 | 遵义宏港机械有限公司 | External numerical control milling machine intelligent coding control system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101013 Termination date: 20181012 |
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| CF01 | Termination of patent right due to non-payment of annual fee |