CN206431265U - Civil power power-fail detection circuit - Google Patents
Civil power power-fail detection circuit Download PDFInfo
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- CN206431265U CN206431265U CN201621433154.0U CN201621433154U CN206431265U CN 206431265 U CN206431265 U CN 206431265U CN 201621433154 U CN201621433154 U CN 201621433154U CN 206431265 U CN206431265 U CN 206431265U
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- circuit
- detection circuit
- isolation
- connection
- polar capacitor
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Abstract
The utility model provides a kind of civil power power-fail detection circuit, belongs to electric circuit inspection field.It includes control circuit, isolation circuit and the detection circuit being sequentially connected, and the input side of isolation circuit connects connection control circuit, the outlet side connection detection circuit of isolation circuit；Control circuit includes the rectification circuit connected with exchanging electrical input, in addition to filter circuit in parallel with isolation circuit respectively and mu balanced circuit and one end are connected the common point of filter circuit and mu balanced circuit, and the other end connects the first resistor of rectification circuit；Detection circuit includes the detecting position being connected with the outlet side of isolation circuit and one end is connected to the pull-up resistor that the detecting position other end is connected dc source；Mu balanced circuit includes a voltage-stabiliser tube；Filter circuit includes a polar capacitor and a second resistance, and one end connection polar capacitor of second resistance, and the other end connects the input side of optical coupler.The utility model has the advantages that circuit structure, processing logic are simple.
Description
Technical field
The utility model is related to a kind of civil power power-fail detection circuit, belongs to electric circuit inspection field.
Background technology
As information intelligent system, information system are continued to develop, the work system of long-term unattended duty increasingly popularizes,
It is more and more stronger to the demand of being capable of effective detection civil power detection of power loss.
The need for meeting city's electro-detection, people have carried out long-term exploration, for example, Chinese patent literature discloses one
Plant electric main power-fail detection circuit, equipment and system [application number：CN201320120107.0], including the partial pressure being sequentially connected
Circuit, rectification circuit, voltage clamp circuit, isolation circuit and detection decision circuit；Electric main live wire accesses the partial pressure
Circuit, the rectification circuit, voltage clamp circuit, isolation circuit are connected to electric main zero line simultaneously；The bleeder circuit is provided
One has the full-wave AC signal of detection voltage, and full-wave AC signal rectification is half-wave voltage signal, the electricity by the rectification circuit
Pressure clamp circuit provides pressure drop for the isolation circuit；When the pressure drop is higher than conduction voltage drop, the isolation circuit conducting is defeated
Go out conducting voltage, when the detection decision circuit detects conducting voltage, the detection decision circuit is defeated by output port
Go out low level formation power frequency square wave；When the pressure drop is less than conduction voltage drop, the isolation circuit stops output conducting voltage, when
When the detection decision circuit detects isolation circuit stopping output conducting voltage, the detection decision circuit passes through output port
Export high level.
Civil power power down is detected although such scheme can be realized, its circuit structure is complicated, processing logic is answered
It is miscellaneous, it is also to be further improved.
The content of the invention
The purpose of this utility model is in view of the above-mentioned problems, providing a kind of civil power power-fail detection circuit simple in construction.
To reach above-mentioned purpose, the utility model employs following technical proposal：The utility model includes what is be sequentially connected
Control circuit, isolation circuit and detection circuit, the input side of the isolation circuit connects connection control circuit, the isolation circuit it is defeated
Go out side connection detection circuit；It is described control circuit include with exchange electrical input be connected rectification circuit, in addition to respectively with every
Filter circuit, mu balanced circuit and one end from circuit in parallel connect the common point of filter circuit and mu balanced circuit, and the other end connects
Connect the first resistor of rectification circuit；The detection circuit includes the detecting position being connected with the outlet side of isolation circuit and one end is connected
The pull-up resistor of dc source is connected in detecting position, the other end；The mu balanced circuit includes a voltage-stabiliser tube；The isolation circuit is
Optical coupler including a light emitting diode and photo thyristor, wherein photo thyristor can also be photodiode, photosensitive
The light-sensitive devices such as triode, the filter circuit includes a polar capacitor and a second resistance, and one end connection of second resistance
Polar capacitor, the other end connects the input side of optical coupler.
By above-mentioned technical proposal, the alternating current that the live wire of electric main, zero line are passed through by rectification circuit carries out rectification and obtained
To dc source, first resistor is used for partial pressure, and mu balanced circuit and filter circuit are respectively used to burning voltage and regulation is delayed.
In above-mentioned civil power power-fail detection circuit, the common point of the negative electrode of the voltage-stabiliser tube and the positive pole of polar capacitor connects
Connect the positive output end of rectification circuit, the common point connection rectification circuit of the anode of the voltage-stabiliser tube and the negative pole of polar capacitor it is negative
Output end.
In above-mentioned civil power power-fail detection circuit, the detecting position connects the input of photo thyristor, described light-operated
The output head grounding of IGCT, the negative pole of the light emitting diode connects the negative pole of polar capacitor.
In above-mentioned civil power power-fail detection circuit, the rectification circuit is to include the bridge rectifier electricity of four diodes
Road.
In above-mentioned civil power power-fail detection circuit, the detecting position connects the input of MCU units.
Compared with prior art, the utility model has the advantage of：Civil power power-fail detection circuit tool of the present utility model
Have simple in construction, the advantages of Detection results are good.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams that the utility model is provided.
In figure, control circuit 1, rectification circuit 11, filter circuit 12, polar capacitor E1, second resistance R2, mu balanced circuit
13rd, voltage-stabiliser tube D1, first resistor R3, isolation circuit 2, light emitting diode 21, photo thyristor 22, detection circuit 3, detecting position
LINE-ERR, pull-up resistor R1, dc source VCC, live wire L, zero line N.
Embodiment
As shown in figure 1, the utility model includes control circuit 1, isolation circuit and the detection circuit being sequentially connected, isolation electricity
The input side on road 2 connects connection control circuit 1, the outlet side connection detection circuit 3 of isolation circuit 2；Control circuit 1 includes and alternating current
The connected rectification circuit 11 of input, in addition to filter circuit 12 in parallel with isolation circuit 2 respectively, mu balanced circuit 13 and one
The common point of end connection filter circuit 11 and mu balanced circuit 13, the other end connects the first resistor R3 of rectification circuit 11；Detection electricity
Road 3 include the detecting position LINE-ERR that is connected with the outlet side of isolation circuit 2 and one end be connected to detecting position LINE-ERR, it is another
End connection dc source VCC pull-up resistor R1；The input of detecting position LINE-ERR connection MCU units；The mu balanced circuit
13 include a voltage-stabiliser tube D1；Isolation circuit 2 is to include the optical coupler OP1 of a light emitting diode 21 and photo thyristor 22, institute
Stating filter circuit 12 includes an a polar capacitor E1 and second resistance R2, and second resistance R2 one end connection polar capacitor E1,
Other end connection optical coupler OP1 input side, in the present embodiment, rectification circuit 11 be include four diode D1 bridge-type it is whole
Current circuit 11, its alternating current for being passed through the live wire L of electric main, zero line N carries out rectification and obtains dc source, first resistor R3
For partial pressure, mu balanced circuit 13 and filter circuit 12 are respectively used to burning voltage and regulation delay.
Further, the common point connection rectification circuit 11 of voltage-stabiliser tube D1 negative electrode and polar capacitor E1 positive pole is just defeated
Go out to hold, the common point of the anode of the voltage-stabiliser tube D1 and polar capacitor E1 negative pole connects the negative output terminal of rectification circuit 11, inspection
The input of location LINE-ERR connections photo thyristor 22, the output head grounding of the photo thyristor 22, described luminous two
The negative pole connection polar capacitor E1 of pole pipe 21 negative pole.
In the present embodiment, under normal circumstances, zero line L and live wire N outputs AC energy, by 11 pairs of bridge rectifier
Alternating current carries out the direct current that rectification is needed, and direct current carries out partial pressure by first resistor R3, and voltage-stabiliser tube D1 is used to ensure
Polar capacitor E1 voltage within the specific limits, so as to further ensure optical coupler OP1 input side by second resistance R2
Voltage within the specific limits, makes light emitting diode normal luminous and will not can be burnt under normal circumstances due to overtension
Bad, now, LEDs ON lights, and thus photo thyristor turns on, so that the loop conducting where detecting circuit, now
It is low level that detecting position, which is pulled up resistance pull-up, and MCU detects low potential, and circuit is normal；And when zero line live wire does not have electric energy defeated
When going out, control circuit 1 place loop does not have electric current, so that light emitting diode can not light, loop where detection circuit does not have equally
There is conducting, now, detecting position is pulled up resistance and is pulled upward to high potential, and MCU detects high level, inlet wire power down or disconnection.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although more having used control circuit 1, rectification circuit 11, filter circuit 12, polar capacitor E1, the second electricity herein
Hinder R2, mu balanced circuit 13, voltage-stabiliser tube D1, first resistor R3, isolation circuit 2, light emitting diode 21, photo thyristor 22, detection
The terms such as circuit 3, detecting position LINE-ERR, pull-up resistor R1, dc source VCC, live wire L, zero line N, but be not precluded from using
The possibility of other terms.It is used for the purpose of more easily describing and explaining essence of the present utility model using these terms；
They are construed to any additional limitation and all disagreed with the utility model spirit.
Claims (5)
1. a kind of civil power power-fail detection circuit (3), it is characterised in that：Including be sequentially connected control circuit (1), isolation circuit
(2) and detection circuit (3), the input side of the isolation circuit (2) connects connection control circuit (1), the output of the isolation circuit (2)
Side connection detection circuit (3)；The control circuit (1) includes the rectification circuit (11) connected with exchanging electrical input, in addition to
The filter circuit (12) in parallel with isolation circuit (2), mu balanced circuit (13) respectively, and one end connection filter circuit (12) with it is steady
The common point of volt circuit (13), the first resistor (R3) of other end connection rectification circuit (11)；It is described detection circuit (3) include with
The connected detecting position (LINE-ERR) of the outlet side of isolation circuit (2) and one end are connected to detecting position (LINE-ERR), the other end
Connect the pull-up resistor (R1) of dc source (VCC)；The mu balanced circuit (13) includes a voltage-stabiliser tube (D1), the isolation circuit
(2) it is to include the optical coupler (OP1) of a light emitting diode (21) and photo thyristor (22)；The filter circuit (12) includes
One polar capacitor (E1) and a second resistance (R2), and one end connection polar capacitor (E1) of second resistance (R2), the other end connect
Connect optical coupler (OP1) input side.
2. civil power power-fail detection circuit (3) according to claim 1, it is characterised in that the negative electrode of the voltage-stabiliser tube (D1)
With the positive output end of the common point of the positive pole of polar capacitor (E1) connection rectification circuit (11), the anode of the voltage-stabiliser tube (D1) and
The negative output terminal of the common point connection rectification circuit (11) of the negative pole of polar capacitor (E1).
3. civil power power-fail detection circuit (3) according to claim 1 or 2, it is characterised in that the detecting position (LINE-
ERR) input of connection photo thyristor (22), the output head grounding of the photo thyristor (22), the light emitting diode
(21) negative pole of negative pole connection polar capacitor (E1).
4. civil power power-fail detection circuit (3) according to claim 1, it is characterised in that the rectification circuit (11) is bag
Include the bridge rectifier of four diodes
5. civil power power-fail detection circuit (3) according to claim 1, it is characterised in that the detecting position (LINE-ERR)
Connect the input of MCU units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433154.0U CN206431265U (en) | 2016-12-26 | 2016-12-26 | Civil power power-fail detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621433154.0U CN206431265U (en) | 2016-12-26 | 2016-12-26 | Civil power power-fail detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206431265U true CN206431265U (en) | 2017-08-22 |
Family
ID=59586813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621433154.0U Expired - Fee Related CN206431265U (en) | 2016-12-26 | 2016-12-26 | Civil power power-fail detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206431265U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387773A (en) * | 2018-04-24 | 2018-08-10 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
| CN110794196A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | Alternating current power failure detection method and device and communication equipment |
| CN110988733A (en) * | 2019-11-25 | 2020-04-10 | 天津津航计算技术研究所 | Be applied to voltage acquisition circuit of aircraft AC115V three-phase alternating current |
-
2016
- 2016-12-26 CN CN201621433154.0U patent/CN206431265U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387773A (en) * | 2018-04-24 | 2018-08-10 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN108387773B (en) * | 2018-04-24 | 2024-03-29 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN110794196A (en) * | 2018-08-01 | 2020-02-14 | 中兴通讯股份有限公司 | Alternating current power failure detection method and device and communication equipment |
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
| CN110988733A (en) * | 2019-11-25 | 2020-04-10 | 天津津航计算技术研究所 | Be applied to voltage acquisition circuit of aircraft AC115V three-phase alternating current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20170822 Termination date: 20201226 |