CN207114623U - A kind of civil power zero passage detection process circuit - Google Patents
A kind of civil power zero passage detection process circuit Download PDFInfo
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- CN207114623U CN207114623U CN201720871322.2U CN201720871322U CN207114623U CN 207114623 U CN207114623 U CN 207114623U CN 201720871322 U CN201720871322 U CN 201720871322U CN 207114623 U CN207114623 U CN 207114623U
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Abstract
It the utility model is related to a kind of civil power zero passage detection process circuit, including rectifier bridge DB1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, voltage-stabiliser tube ZD1, photoelectrical coupler U1 and triode Q1；Wherein, first resistor R1 and second resistance R2 concatenations, 3rd resistor R3 and the 4th resistance R4 series connection, voltage-stabiliser tube ZD1 simultaneously provide stable electric current to photoelectrical coupler in photoelectrical coupler U1 input, and through the 5th resistance R5 and the 6th resistance R6 current limlitings；Photoelectrical coupler output signal passes through triode Q1 paraphase, the crossover point signal of output and civil power with frequency with phase.The utility model is simple in construction, easy to implement, realizes mains isolation by 8 resistance, a rectifier bridge, a voltage-stabiliser tube and a triode, waveform processing is few with element, simple in construction, debugs the advantages that facilitating.
Description
Technical field
Circuit protection field is the utility model is related to, particularly a kind of civil power zero passage detection process circuit.
Background technology
In electronic circuit field, the application of sinusoidal ac is more and more extensive, in circuit design, usually in civil power zero passage
When open triggering or close some circuits, conventional civil power zero cross detection circuit handled with discharge circuit it is very complicated, some
Detected with scm software, costly, element is more, and also complicated, the utility model element is few, simple in construction, is easy to make and realizes.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of civil power zero passage detection process circuit, with simply commonly
Element carry out signal transacting, simple and reliable, pure hardware makes, and can carry out waveform processing well.
The utility model is realized using following scheme：A kind of civil power zero passage detection process circuit, including rectifier bridge DB1,
One resistance R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7,
Eight resistance R8, voltage-stabiliser tube ZD1, photoelectrical coupler U1 and triode Q1；Wherein, two exchange inputs of the rectifier bridge DB1
Duan Yu cities are electrically connected；The cathode output end of the rectifier bridge DB1 is connected with one end of the first resistor R1, the first resistor
The R1 other end is connected with one end of the second resistance R2, the other end of the second resistance R2 and the 5th resistance R5 one end
And the positive pole of the voltage-stabiliser tube ZD1 is connected；One end phase of the cathode output end of the rectifier bridge DB1 and the 3rd resistor R3
Even, the other end of the 3rd resistor R3 is connected with one end of the 4th resistance R4, the other end of the 4th resistance R4 and
6th resistance R6 one end and the voltage-stabiliser tube ZD1 negative pole are connected；The other end of the 5th resistance R5 and the photoelectricity
Coupler U1 1 pin is connected, and the other end of the 6th resistance R6 is connected with 2 pin of the photoelectrical coupler U1, the photoelectricity
Coupler U1 4 pin are connected with one end of the 7th resistance R7 and the base stage of the triode Q1, the triode Q1's
Colelctor electrode is connected with one end of the 8th resistance R8, and the colelctor electrode of the triode Q1 is believed to export the waveform after processing
Number；The other end of the 7th resistance R7 is connected with the other end of the 8th resistance R8 with a 5V power supplys；The photoelectricity coupling
The emitter stage of clutch U1 3 pin and the triode Q3 is grounded.
Further, the voltage-stabiliser tube ZD1 is 12V voltage-regulator diodes, to protect the input of photoelectrical coupler.
Further, the triode Q1 is NPN triode.
Further, the model S8050 of the NPN triode.
Further, the model PC817 of the photoelectrical coupler U1, plays buffer action.
Further, the rectifier bridge DB1 is high withstand voltage rectifier bridge, can be whole AC rectification into Rectified alternating current
Direct current after stream does not filter, and has zero crossing.
Further, the first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance are
20K。
Further, the resistance of the 5th resistance R5 and the 6th resistance R6 is 1K.
Further, the resistance of the 7th resistance R7 and the 8th resistance R8 is 100K.
Preferably, after the ac input end of the rectifier bridge DB1 connects civil power, rectifier bridge DB1 output termination current-limiting resistance
Photoelectrical coupler U1 input, i.e. 1 pin and 2 pin are flowed through after voltage-stabiliser tube ZD1 amplitude limits, civil power positive-negative half-cycle all passes through photoelectricity
Coupler U1 input, when civil power zero crossing voltage is less than optocoupler conducting voltage, optocoupler is not turned on, most of the time optocoupler
It is conducting, paraphase is led by triode, the waveform of output is that the time of triode ON is short, the time length of cut-off, is so gone
Fall transistor collector pull-up resistor can and handle some special waveforms.
Compared with prior art, the utility model has the advantages that：The utility model is simple in construction, embodiment party
Just, mains isolation is realized by 8 resistance, a rectifier bridge, a voltage-stabiliser tube and a triode, waveform processing, there is member
Part is few, simple in construction, debugs the advantages that facilitating.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present utility model.
Fig. 2 is waveform of the present embodiment civil power after rectifier bridge.
Fig. 3 is the voltage waveform at voltage-stabiliser tube both ends in the present embodiment.
Fig. 4 is the waveform that transistor collector exports in the present embodiment.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the utility model.
The present embodiment provides a kind of civil power zero passage detection process circuit, as shown in figure 1, including rectifier bridge DB1, first resistor
R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance
R8, voltage-stabiliser tube ZD1, photoelectrical coupler U1 and triode Q1；Wherein, two ac input ends of the rectifier bridge DB1 and city
It is electrically connected；The cathode output end of the rectifier bridge DB1 is connected with one end of the first resistor R1, and the first resistor R1's is another
One end is connected with one end of the second resistance R2, the other end of the second resistance R2 and the 5th resistance R5 one end and institute
The positive pole for stating voltage-stabiliser tube ZD1 is connected；The cathode output end of the rectifier bridge DB1 is connected with one end of the 3rd resistor R3, institute
The other end for stating 3rd resistor R3 is connected with one end of the 4th resistance R4, the other end of the 4th resistance R4 and the 6th electricity
Hinder R6 one end and the negative pole of the voltage-stabiliser tube ZD1 is connected；The other end of the 5th resistance R5 and the photoelectrical coupler
U1 1 pin is connected, and the other end of the 6th resistance R6 is connected with 2 pin of the photoelectrical coupler U1, the photoelectrical coupler
U1 4 pin are connected with one end of the 7th resistance R7 and the base stage of the triode Q1, the colelctor electrode of the triode Q1
Be connected with one end of the 8th resistance R8, and the colelctor electrode of the triode Q1 to export processing after waveform signal；Institute
The 7th resistance R7 other end is stated with the other end of the 8th resistance R8 with a 5V power supplys to be connected；The photoelectrical coupler U1
The emitter stages of 3 pin and the triode Q3 be grounded.
In the present embodiment, the voltage-stabiliser tube ZD1 is 12V voltage-regulator diodes, to protect the input of photoelectrical coupler,
Amplitude when limitation civil power is too high, makes photoelectrical coupler U1 input current in safe range.
In the present embodiment, the triode Q1 is NPN triode.
In the present embodiment, the model S8050 of the NPN triode.
In the present embodiment, the model PC817 of the photoelectrical coupler U1, plays buffer action.
In the present embodiment, the rectifier bridge DB1 is high withstand voltage rectifier bridge, can be AC rectification into pulsating direct current
Electricity, rectification are out 2 times of mains frequencies, and the direct current after rectification does not filter, and has zero crossing.
In the present embodiment, the first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance
It is 20K.
In the present embodiment, the resistance of the 5th resistance R5 and the 6th resistance R6 is 1K.
In the present embodiment, the resistance of the 7th resistance R7 and the 8th resistance R8 is 100K；8th resistance R8 is upper
Pull-up resistor, it can also in particular cases cancel, the 7th resistance R7 is upper offset resistance.
In the present embodiment, the principle analysis of the civil power zero passage detection process circuit is as follows：Civil power passes through rectifier bridge DB1
It is converted into steamed bun ripple (steamed bun ripple as shown in Figure 2) afterwards, the steamed bun ripple is waveform behind commercial power rectification something like circle steamed bun, because
This it be referred to as steamed bun ripple；Steamed bun wave voltage, which is added on voltage-stabiliser tube ZD1, forms new waveform (waveform as shown in Figure 3), is voltage stabilizing
The voltage at pipe both ends, the flat-top steamed bun wave current after voltage-stabiliser tube amplitude limit is through the 5th resistance R5, photoelectrical coupler U1 1 pin, light
Electric coupler U1 2 pin, the 6th resistance R6, make optocoupler be turned off in zero passage, the conducting of flat-top steamed bun ripple stage, while photoelectric coupling
Device U1 output end conducting, drags down triode Q1 base stage, triode Q1 cut-offs, and triode Q1 colelctor electrode is due to pull-up electricity
Hinder high level, similarly, when optocoupler ends, triode Q1 base voltage rise, triode Q1 conductings, triode Q1 current collection
Pole tension declines, and exports low level, completes waveform processing, and output waveform (waveform as shown in Figure 4).
In the present embodiment, when the civil power zero passage, photoelectrical coupler U1 input terminal voltage is very low, is insufficient to allow light
Coupling turns on, and when some voltage optocoupler just turns on outside line voltage zero crossing, regulation current-limiting resistance R1-R4 resistance can adjust light
The time of coupling cut-off, that is, the time width of zero crossing can be adjusted.
It is all to be done by the utility model it is noted that the utility model is not limited to the embodiment above
Any equivalent change and modification, caused function without departing from this programme scope when, belong to guarantor of the present utility model
Protect scope.
Claims (9)
- A kind of 1. civil power zero passage detection process circuit, it is characterised in that：Including rectifier bridge DB1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, voltage-stabiliser tube ZD1, photoelectrical coupler U1 and triode Q1；Wherein, two ac input ends of the rectifier bridge DB1 are electrically connected with city；Institute The cathode output end for stating rectifier bridge DB1 is connected with one end of the first resistor R1, the other end of the first resistor R1 and institute The one end for stating second resistance R2 is connected, the other end of the second resistance R2 and the 5th resistance R5 one end and the voltage-stabiliser tube ZD1 positive pole is connected；The cathode output end of the rectifier bridge DB1 is connected with one end of the 3rd resistor R3, the 3rd electricity The resistance R3 other end is connected with one end of the 4th resistance R4, the other end of the 4th resistance R4 and the one of the 6th resistance R6 End and the voltage-stabiliser tube ZD1 negative pole are connected；The other end of the 5th resistance R5 and the 1 pin phase of the photoelectrical coupler U1 Even, the other end of the 6th resistance R6 is connected with 2 pin of the photoelectrical coupler U1,4 pin of the photoelectrical coupler U1 and One end of the 7th resistance R7 and the base stage of the triode Q1 are connected, the colelctor electrode of the triode Q1 and the described 8th Resistance R8 one end is connected, and the colelctor electrode of the triode Q1 to export processing after waveform signal；7th resistance The R7 other end is connected with the other end of the 8th resistance R8 with a 5V power supplys；3 pin of the photoelectrical coupler U1 and institute The emitter stage for stating triode Q3 is grounded.
- A kind of 2. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The voltage-stabiliser tube ZD1 is 12V voltage-stabiliser tubes.
- A kind of 3. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The triode Q1 is NPN triode.
- A kind of 4. civil power zero passage detection process circuit according to claim 3, it is characterised in that：The NPN triode Model S8050.
- A kind of 5. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The photoelectrical coupler U1 Model PC817.
- A kind of 6. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The rectifier bridge DB1 is High withstand voltage rectifier bridge.
- A kind of 7. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The first resistor R1, Second resistance R2,3rd resistor R3 and the 4th resistance R4 resistance are 20K.
- A kind of 8. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The 5th resistance R5 with 6th resistance R6 resistance is 1K.
- A kind of 9. civil power zero passage detection process circuit according to claim 1, it is characterised in that：The 7th resistance R7 with 8th resistance R8 resistance is 100K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720871322.2U CN207114623U (en) | 2017-07-18 | 2017-07-18 | A kind of civil power zero passage detection process circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720871322.2U CN207114623U (en) | 2017-07-18 | 2017-07-18 | A kind of civil power zero passage detection process circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207114623U true CN207114623U (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720871322.2U Expired - Fee Related CN207114623U (en) | 2017-07-18 | 2017-07-18 | A kind of civil power zero passage detection process circuit |
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| Country | Link |
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| CN (1) | CN207114623U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656180A (en) * | 2019-01-10 | 2019-04-19 | 宁波市机电工业研究设计院有限公司 | Biohazard Safety Equipment control system |
| CN111521862A (en) * | 2020-06-01 | 2020-08-11 | 浙江嘉宏电力科技有限公司 | Accurate-calibration type zero-crossing detection method |
| CN111707862A (en) * | 2020-07-10 | 2020-09-25 | 纽福克斯光电科技（上海）有限公司 | Power failure detection circuit |
-
2017
- 2017-07-18 CN CN201720871322.2U patent/CN207114623U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656180A (en) * | 2019-01-10 | 2019-04-19 | 宁波市机电工业研究设计院有限公司 | Biohazard Safety Equipment control system |
| CN111521862A (en) * | 2020-06-01 | 2020-08-11 | 浙江嘉宏电力科技有限公司 | Accurate-calibration type zero-crossing detection method |
| CN111707862A (en) * | 2020-07-10 | 2020-09-25 | 纽福克斯光电科技（上海）有限公司 | Power failure detection circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180316 Termination date: 20210718 |