CN204481783U - On-off model protective circuit and there is the control device of this circuit - Google Patents
On-off model protective circuit and there is the control device of this circuit Download PDFInfo
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- CN204481783U CN204481783U CN201520115263.7U CN201520115263U CN204481783U CN 204481783 U CN204481783 U CN 204481783U CN 201520115263 U CN201520115263 U CN 201520115263U CN 204481783 U CN204481783 U CN 204481783U
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Abstract
The utility model discloses a kind of on-off model protective circuit and have the control device of this circuit, wherein on-off model protective circuit comprises external signal processing unit and sluggish protected location; External signal processing unit is used for generating pending on-off model according to the external signal of input; Sluggish protected location is used for receiving and processing pending on-off model; Filter unit is provided with between external signal processing unit and sluggish protected location.The hysteresis interaction energy of sluggish protected location effectively reduces pending on-off model self to the sensitiveness of electromagnetic noise, makes the level of output switch amount signal to produce fluctuation.Filter unit is provided with between external signal processing unit and sluggish protected location; just sluggish protected location can be transferred to after making the first cell processing after filtering of pending on-off model; removed the momentary fluctuation interference of this external signal by the time-lag action of this filter unit further, further ensure the quality of output switch amount signal.
Description
Technical field
The utility model relates to electronic technology field, especially, relates to a kind of on-off model protective circuit.In addition, the utility model also relates to a kind of control device with above-mentioned on-off model protective circuit.
Background technology
Increasingly mature along with electronic technology, the sharply expansion of its range of application, various intelligent electronic device continues to bring out out like the mushrooms after rain, great convenience people studying and livings, but, while enjoyment intelligent electronic device brings enjoyment, people too can be worried because intelligent electronic device breaks down.In modern electronic technology, all need to carry out a large amount of electrical communication between each intelligent electronic device and between the inner each unit of intelligent electronic device, and in the process of transmission, the signal of telecommunication is easily subject to the interference of external electromagnetic noise and distortion or/sudden change occurs, thus make equipment or system jam, especially, when being controlled safely relevant device by digital controlled signal, if this digital controlled signal distorts, also serious potential safety hazard will be produced.
In transmission process for digital signal, optocoupler and transistor are all the most frequently used electronic devices and components, this kind of electrical characteristics of optocoupler and transistor are: if when the voltage of drive singal is higher than threshold value, then optocoupler and transistor turns work, if when the voltage of drive singal is lower than threshold value, then optocoupler and transistor cutoff, but, in the application of electronic technology of reality, drive singal is once distort because of electromagnetic interference, make its voltage close to or be in threshold value time, optocoupler and transistor are by labile state logical when breaking when being in, thus the level state of the digital signal making optocoupler or transistor generate is unstable, without being suspected to have him, this unstable transmission state of digital signal will cause equipment fault, even may cause the generation of accident.
Utility model content
The utility model provides a kind of on-off model protective circuit and has the control device of this circuit, to solve pending on-off model in transmitting procedure easily because of by the technical problem of level state shakiness after external electromagnetic interference.
The technical solution adopted in the utility model is as follows:
According to an aspect of the present invention, provide a kind of on-off model protective circuit, on-off model protective circuit comprises external signal processing unit and sluggish protected location;
External signal processing unit is used for generating pending on-off model according to the external signal of input;
Sluggish protected location is used for receiving and processing pending on-off model, and filtering is entrained in the noise level disturbance in described pending on-off model;
Be provided with filter unit between external signal processing unit and sluggish protected location, described filter unit is for eliminating the error caused by external signal fluctuation.
Further, external signal processing unit comprises optocoupler or transistor, and optocoupler or transistor are used for according to external signal conducting or cut-off;
Filter unit comprises capacitive filter or capacitance-resistance filter.
Further; sluggish protected location comprises operational amplifier; the inverting input of operational amplifier is for receiving pending on-off model; the normal phase input end of operational amplifier imports reference voltage through the first resistance, and arranges the second resistance for feeding back between the output of described normal phase input end and described operational amplifier.
Further, switching value protective circuit comprises the first pressure regulation unit, is connected for one end of input reference voltage with on the first resistance, for regulating the level of reference voltage.
Further, switching value protective circuit comprises voltage limiter, and external signal inputs to external signal processing unit after voltage limiter pressure limiting process.
Further, switching value protective circuit comprises the second pressure regulation unit, for converting the external signal inputing to the second pressure regulation unit to input to external signal processing unit preprocessed signal.
Further, the second pressure regulation unit comprises the 3rd resistance, and one end of described 3rd resistance is connected with the drive end of described optocoupler or described transistor with one end of the 4th resistance, and the other end of described 3rd resistance is for receiving described external signal.
Further, the first pressure regulation unit comprises microprocessor and D/A converter, and microprocessor is used for sending DA conversion command, and D/A converter is used for generating reference voltage according to DA conversion command.
Further, on-off model protective circuit is also provided with the anti-reverse diode being serially connected with external signal processing unit input.
According to another aspect of the present utility model; additionally provide a kind of control device; comprise master controller and control signal output, arrange circuit board between master controller and control signal output, on-off model protective circuit described above is integrated to be welded on this circuit board.
The utility model has following beneficial effect:
The utility model on-off model protective circuit comprises external signal processing unit and sluggish protected location; External signal processing unit is used for generating pending on-off model according to the external signal of input; Sluggish protected location is used for receiving and processing pending on-off model; Filter unit is provided with between external signal processing unit and sluggish protected location.This external signal both can be analog signal, also can be digital signal, and the hysteresis interaction energy of sluggish protected location effectively reduces pending on-off model self to the sensitiveness of electromagnetic noise, made the level of output switch amount signal to produce fluctuation.Moreover; filter unit is provided with between external signal processing unit and sluggish protected location; make pending on-off model just must can transfer to sluggish protected location after first cell processing after filtering; if external signal produces momentary fluctuation; also pending on-off model can be caused to produce interference of fluctuating accordingly; and pass through the time-lag action of this filter unit; the output of sluggish protected location is remained unchanged; thus effectively remove this momentary fluctuation interference, further ensure the quality of output switch amount signal.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the circuit structure block diagram of the utility model preferred embodiment;
Fig. 2 is the principle schematic of sluggish protected location shown in Fig. 1;
Fig. 3 is the interference eradicating efficacy schematic diagram of sluggish protected location shown in Fig. 1;
Fig. 4 is the interference eradicating efficacy schematic diagram of the switching value protective circuit not with filter unit; And
Fig. 5 is the interference eradicating efficacy schematic diagram of the switching value protective circuit of band filter unit.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
According to an aspect of the present invention, with reference to Fig. 1, preferred embodiment of the present utility model provides a kind of on-off model protective circuit, comprises external signal processing unit 10 and sluggish protected location 30; External signal processing unit 10 is for generating pending on-off model according to the external signal of input; Sluggish protected location 30 is for receiving and processing pending on-off model, and filtering is entrained in the noise level disturbance in pending on-off model; Be provided with filter unit 20 between external signal processing unit 10 and sluggish protected location 30, filter unit 20 is for eliminating the error caused by external signal fluctuation.This external signal both can be analog signal, also can be digital signal, and the hysteresis interaction energy of sluggish protected location 30 effectively reduces pending on-off model self to the sensitiveness of electromagnetic noise, made the level of output switch amount signal to produce fluctuation.Moreover, filter unit 20 is provided with between external signal processing unit 10 and sluggish protected location 30, make pending on-off model just must can transfer to sluggish protected location 30 after the first process of unit 20 after filtering, if external signal produces momentary fluctuation, also pending on-off model can be caused to produce interference of fluctuating accordingly, with reference to Fig. 4, when external signal fluctuates near driving gate voltage limit, external signal processing unit 10 is in critical excitation always, and pass through the time-lag action of this filter unit 20, with reference to Fig. 5, the output of sluggish protected location 30 is remained unchanged, thus effectively remove this momentary fluctuation interference, further ensure the quality of output switch amount signal, and the threshold values of filter circuit and sluggish protected location 30 can be regulated according to environment for use, make the present embodiment range of application more extensive.
Alternatively, external signal processing unit 10 comprises optocoupler or transistor, and optocoupler or transistor are used for according to external signal conducting or cut-off, thus generate pending on-off model; Filter unit 20 comprises capacitive filter or capacitance-resistance filter.When site of deployment has demand to electrical isolation, select optocoupler, otherwise select transistor, because transistor has the advantage that cost is low, maintenance is simple and power is larger.With reference to Fig. 1, the capacitance-resistance filter structure that this preferred embodiment selects resistance R3 and electric capacity C1 to form, the pending on-off model produced by optocoupler inputs to the inverting input of operational amplifier A 1 after R3 and C1.
Alternatively; sluggish protected location 30 comprises operational amplifier A 1; the inverting input of operational amplifier A 1 is for receiving pending on-off model; the normal phase input end of operational amplifier A 1 imports reference voltage V ref through the first resistance R1, and arranges the second resistance R2 for feeding back between the output of normal phase input end and operational amplifier A 1.The positive phase voltage inputing to operational amplifier A 1 normal phase input end is obtained by the dividing potential drop effect of the first resistance R1 and the second resistance R2, and the level of the output of operational amplifier A 1 only has maximum power supply voltage and minimum power supply voltage, two states, positive phase voltage is made also to there is corresponding high level U
hstate and low level U
lstate.With reference to Fig. 2, when the reverse voltage inputing to operational amplifier A 1 inverting input raises, this reverse voltage must higher than U
hthe output level upset of operational amplifier A 1 could be triggered; In like manner, when the reverse voltage inputing to operational amplifier A 1 inverting input reduces, this reverse voltage must lower than U
lthe output level upset of operational amplifier A 1 could be triggered, thus define a hysteresis, based on this hysteresis, can effectively eliminate magnitude of voltage between U
land U
hbetween disturbance fluctuation.With reference to Fig. 3, wherein, U
hfor 2V, U
lfor-2V.
Alternatively, switching value protective circuit comprises the first pressure regulation unit, is connected for one end of input reference voltage Vref with on the first resistance R1, for regulating the level of reference voltage V ref.By the first pressure regulation unit, reference voltage V ref level is regulated, the U of different positive phase voltages can be obtained
hand U
l, thus achieve the corresponding adjustment to hysteresis threshold value, to meet different application demands.
Alternatively, switching value protective circuit comprises voltage limiter, and external signal inputs to external signal processing unit 10 after voltage limiter pressure limiting process.Preferably, voltage limiter comprises the TVS pipe D2 and/or piezo-resistance that are parallel to external signal processing unit 10 input.The application of voltage limiter can effectively avoid outside transient peak or surge voltage to damage internal component, ensures the reliability of circuit.
Alternatively, switching value protective circuit comprises the second pressure regulation unit, for converting the external signal inputing to the second pressure regulation unit to input to external signal processing unit 10 preprocessed signal.When external signal is analog voltage, and when the driving gate voltage limit of this analog voltage level and optocoupler or transistor differs larger, if directly drive optocoupler or transistor by external signal, optocoupler or transistor damage can be caused, and once external signal produces fluctuation by external electromagnetic noise interference, then easily near this driving gate voltage limit, and then introduce the amount of opening the light noise, so external signal can be adjusted to reasonable interval according to actual conditions by the second pressure regulation unit in advance, to make the effect of the present embodiment better.
Alternatively, the second pressure regulation unit comprises the 3rd resistance, and one end of the 3rd resistance is connected with the drive end of optocoupler or transistor with one end of the 4th resistance, and the other end of the 3rd resistance is for receiving external signal.When driving gate voltage limit higher than optocoupler or transistor of the voltage of external signal, the mode of electric resistance partial pressure can be adopted to carry out step-down.
Alternatively, the first pressure regulation unit comprises microprocessor and D/A converter, and microprocessor is used for sending DA conversion command, and D/A converter is used for generating reference voltage V ref according to DA conversion command.Control exported reference voltage V ref by microprocessor, control mode can be made more accurately meticulous, the On-line Control of switch amount protective circuit can be realized again.The autgmentability of the present embodiment is better, and reaches the effect of Based Intelligent Control.
Alternatively, on-off model protective circuit is also provided with the anti-reverse diode D1 being serially connected with external signal processing unit 10 input.When electric power polarity is missed reversal connection by Field Force in operation, anti-reverse diode D1 can effectively avoid circuit components by the reverse breakdown of unrepairable.
According to another aspect of the present utility model; preferred embodiment of the present utility model additionally provides a kind of control device; comprise master controller and control signal output; arrange circuit board between master controller and control signal output, above-mentioned on-off model protective circuit is integrated to be welded on this circuit board.Because comprise the circuit board being welded with on-off model protective circuit described above, so the precision of the utility model control device, stability and reliability are better.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. an on-off model protective circuit, is characterized in that, described on-off model protective circuit comprises external signal processing unit (10) and sluggish protected location (30);
Described external signal processing unit (10) is for generating pending on-off model according to the external signal of input;
Described sluggish protected location (30) is for receiving described pending on-off model, and filtering is entrained in the noise level disturbance in described pending on-off model;
Be provided with filter unit (20) between described external signal processing unit (10) and described sluggish protected location (30), described filter unit (20) is for eliminating the error caused by the fluctuation of described external signal.
2. on-off model protective circuit according to claim 1, is characterized in that,
Described external signal processing unit (10) comprises optocoupler or transistor, and described optocoupler or described transistor are used for according to described external signal conducting or cut-off;
Described filter unit (20) comprises capacitive filter or capacitance-resistance filter.
3. on-off model protective circuit according to claim 1, is characterized in that,
Described sluggish protected location (30) comprises operational amplifier; the inverting input of described operational amplifier is for receiving described pending on-off model; the normal phase input end of described operational amplifier imports reference voltage through the first resistance, and arranges the second resistance for feeding back between the output of described normal phase input end and described operational amplifier.
4. on-off model protective circuit according to claim 3, is characterized in that,
Described switching value protective circuit comprises the first pressure regulation unit, is connected for the one end inputting described reference voltage with on described first resistance, for regulating the level of described reference voltage.
5. on-off model protective circuit according to claim 1, is characterized in that,
Described switching value protective circuit comprises voltage limiter, and described external signal inputs to described external signal processing unit (10) after described voltage limiter pressure limiting process.
6. on-off model protective circuit according to claim 2, is characterized in that,
Described switching value protective circuit comprises the second pressure regulation unit, for converting the described external signal inputing to described second pressure regulation unit to input to described external signal processing unit (10) preprocessed signal.
7. on-off model protective circuit according to claim 6, is characterized in that,
Described second pressure regulation unit comprises the 3rd resistance, and one end of described 3rd resistance is connected with the drive end of described optocoupler or described transistor with one end of the 4th resistance, and the other end of described 3rd resistance is for receiving described external signal.
8. on-off model protective circuit according to claim 4, is characterized in that,
Described first pressure regulation unit comprises microprocessor and D/A converter, and described microprocessor is used for sending DA conversion command, and described D/A converter is used for generating described reference voltage according to described DA conversion command.
9., according to the arbitrary described on-off model protective circuit of claim 1 to 8, it is characterized in that,
Described on-off model protective circuit is also provided with the anti-reverse diode being serially connected with described external signal processing unit (10) input.
10. a control device; comprise master controller and control signal output; it is characterized in that, between described master controller and described control signal output, circuit board is set, the on-off model protective circuit as described in as arbitrary in claim 1 to 9 is integrated be welded in as described on circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520115263.7U CN204481783U (en) | 2015-02-17 | 2015-02-17 | On-off model protective circuit and there is the control device of this circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520115263.7U CN204481783U (en) | 2015-02-17 | 2015-02-17 | On-off model protective circuit and there is the control device of this circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204481783U true CN204481783U (en) | 2015-07-15 |
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| CN201520115263.7U Active CN204481783U (en) | 2015-02-17 | 2015-02-17 | On-off model protective circuit and there is the control device of this circuit |
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| CN (1) | CN204481783U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645881A (en) * | 2016-11-25 | 2017-05-10 | 佛山科学技术学院 | Detection circuit capable of tracking peak value |
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2015
- 2015-02-17 CN CN201520115263.7U patent/CN204481783U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645881A (en) * | 2016-11-25 | 2017-05-10 | 佛山科学技术学院 | Detection circuit capable of tracking peak value |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 412007 "no.212-215 office" of South valve single storey joint span workshop and auxiliary (workshop of original power station valve workshop warehouse) and office building (room) of Tiantai Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Zhuzhou South General Electric Co., Ltd. Address before: Baoan District Fuyong Zhen Fu Garden in Shenzhen city Guangdong province 518103 Road, Tin Shui Dong A5 Industrial Park Patentee before: SHENZHEN SOUTHERN GENERAL ELECTRIC COMPANY LIMITED |