CN203101588U - AC power switching value acquisition circuit - Google Patents
AC power switching value acquisition circuit Download PDFInfo
- Publication number
- CN203101588U CN203101588U CN 201220694098 CN201220694098U CN203101588U CN 203101588 U CN203101588 U CN 203101588U CN 201220694098 CN201220694098 CN 201220694098 CN 201220694098 U CN201220694098 U CN 201220694098U CN 203101588 U CN203101588 U CN 203101588U
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- CN
- China
- Prior art keywords
- power
- optical coupler
- bidirectional optical
- way optocoupler
- optocoupler chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000002457 bidirectional Effects 0.000 abstract 7
- 230000003287 optical Effects 0.000 abstract 7
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model discloses an AC power switching value acquisition circuit comprising a bidirectional optical coupler chip IC1and a central processor CPU; two input pins of the bidirectional optical coupler chip IC1 are connected with an AC power S1; a dividing resistor R1 and a switch K1 are connected between one input pin of the bidirectional optical coupler chip IC1 and the AC power S1; a dividing resistor R2 is connected between the two input pins of the bidirectional optical coupler chip IC1; one output pin of the bidirectional optical coupler chip IC1 is connected with power VCC, and the other output pin of the bidirectional optical coupler chip IC1 is connected with the central processor CPU; and the other output pin of the bidirectional optical coupler chip IC1 is respectively connected to ground through a capacitor R4, and through a capacitor C1 and R3 mutually connected in series. The AC power switching value acquisition circuit is simple in structure, stable in performance, improves reliability and stability of the circuit, and greatly reduces operation cost of a transformer substation.
Description
Technical field
The utility model relates to the Acquisition Circuit field, is specially a kind of ac power switch amount Acquisition Circuit.
Background technology
At present in the comprehensive automation system of transformer substation, instrument industry, current most switch acquisition is that the break-make by direct supply in the switch acquisition loop realizes, but the working-yard often has only alternating current, often need to increase DC power supply device (direct current cabinet) in order to gather switching value, perhaps utilize the AC power of switch acquisition device own to export the public power of one group of low-voltage dc power supply as the switch acquisition loop through rectifier bridge.For the mode that adopts direct current cabinet, owing to adopt accumulator, need regular maintenance, and direct current cabinet need additionally purchase direct current cabinet monitoring and routing inspection unit, cause the increase of switch acquisition entire system cost; For the mode that adopts switch acquisition device self output DC source; the direct current that rectification goes out is low-tension supply (for example DC24V) often; and there is for example motor of many heavy current installations at the transformer station scene; frequency converter etc.; many switching value return cable often have hundreds of meters distance simultaneously, very easily are interfered with the low-voltage direct sampling in this case, cause device to collect wrong switching value; thereby cause protective relaying maloperation, cause very big hidden danger to power grid security.
The utility model content
The purpose of this utility model provides a kind of ac power switch amount Acquisition Circuit, to solve the problem that prior art exists.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of ac power switch amount Acquisition Circuit, it is characterized in that: include two-way optocoupler chip IC 1, central processor CPU, two input pin incoming transport power supply S1 of described two-way optocoupler chip IC 1, be connected to divider resistance R1 between two-way optocoupler chip IC 1 one of them input pin and the AC power S1, be connected to K switch 1 between divider resistance R1 and the AC power S1, also be connected to divider resistance R2 between 1 liang of input pin of two-way optocoupler chip IC, 1 one output pins of described two-way optocoupler chip IC meet power supply VCC, another output pin inserts central processor CPU, and also passes through electric capacity R4 between two-way optocoupler chip IC 1 another output pin and the central processor CPU, the capacitor C 1 of mutual series connection and R3 be ground connection respectively.
The utility model advantage is:
The beneficial effects of the utility model:
1, simple in structure, complicated rectifier bridge output circuit is abandoned in stable performance, is easy to be integrated in the switch acquisition device, improves the reliability and stability of circuit.
2, cheap, need not to use expensive DC power-supply system, can satisfy the switch acquisition requirement, can reduce the operation cost of transformer station greatly.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1.A kind of ac power switch amount Acquisition Circuit, include two-way optocoupler chip IC 1, central processor CPU, two input pins 1 of two-way optocoupler chip IC 1,2 incoming transport power supply S1, be connected to divider resistance R1 between two-way optocoupler chip IC 1 one of them input pin 1 and the AC power S1, be connected to K switch 1 between divider resistance R1 and the AC power S1,1 liang of input pin 1 of two-way optocoupler chip IC, also be connected to divider resistance R2 between 2,1 one output pins 3 of two-way optocoupler chip IC meet power supply VCC, another output pin 4 inserts central processor CPU, and also passes through electric capacity R4 between two-way optocoupler chip IC 1 another output pin 4 and the central processor CPU, the capacitor C 1 of mutual series connection and R3 be ground connection respectively.
When K switch 1 is connected, AC power S1 is by divider resistance R1, R2 carries out dividing potential drop, restriction flows into the electric current of optocoupler IC1, enter the input pin 1 of two-way optocoupler chip IC 1, pin 2, the collector pin 3 of two-way optocoupler chip IC 1 connects the VCC positive supply, emitter pin 4 connecting resistance R3, resistance R 4, with CPU input pin 1, while resistance R 3 and capacitor C 1 series connection ground connection, resistance R 4 another pin ground connection, two-way optocoupler chip IC 1 conducting this moment, two-way optocoupler chip IC 1 pin 4 output high level, capacitor C 1 begins charging through resistance R 3, capacitor C 1 provide when AC power S1 voltage negative by forward, perhaps by negative sense accelerating transition formula, two-way optocoupler chip IC 1 of short duration by the time voltage, make the output voltage stabilization of two-way optocoupler chip IC 1 pin 4 simultaneously, resistance R 3 is used to limit the charging current to capacitor C 1, prevent because the charging current of capacitor C 1 is excessive, cause the instability of circuit board working power VCC, this moment, output signal was a high level always, and CPU collects high level and represents switch connection; When K switch 1 disconnected, two-way optocoupler chip IC 1 was ended, and electric capacity is by resistance R 3, R4 rapid discharge, and voltage drops to zero, and two-way optocoupler chip IC 1 pin 4 becomes low level, and central processor CPU collected low level and represented that switch disconnects this moment.
Claims (1)
1. ac power switch amount Acquisition Circuit, it is characterized in that: include two-way optocoupler chip IC 1, central processor CPU, two input pin incoming transport power supply S1 of described two-way optocoupler chip IC 1, be connected to divider resistance R1 between two-way optocoupler chip IC 1 one of them input pin and the AC power S1, be connected to K switch 1 between divider resistance R1 and the AC power S1, also be connected to divider resistance R2 between 1 liang of input pin of two-way optocoupler chip IC, 1 one output pins of described two-way optocoupler chip IC meet power supply VCC, another output pin inserts central processor CPU, and also passes through electric capacity R4 between two-way optocoupler chip IC 1 another output pin and the central processor CPU, the capacitor C 1 of mutual series connection and R3 be ground connection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694098 CN203101588U (en) | 2012-12-14 | 2012-12-14 | AC power switching value acquisition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220694098 CN203101588U (en) | 2012-12-14 | 2012-12-14 | AC power switching value acquisition circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203101588U true CN203101588U (en) | 2013-07-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220694098 Expired - Fee Related CN203101588U (en) | 2012-12-14 | 2012-12-14 | AC power switching value acquisition circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203101588U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956886A (en) * | 2014-05-12 | 2014-07-30 | 上海阿卡得电子有限公司 | Circuit for allowing alternating-current electric equipment to form control signals at two states |
| WO2015184832A1 (en) * | 2014-10-09 | 2015-12-10 | 中兴通讯股份有限公司 | Alternating current detection circuit |
| CN109917278A (en) * | 2019-03-29 | 2019-06-21 | 宁波奥克斯电气股份有限公司 | A kind of forceful electric power logic detection system and method |
-
2012
- 2012-12-14 CN CN 201220694098 patent/CN203101588U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956886A (en) * | 2014-05-12 | 2014-07-30 | 上海阿卡得电子有限公司 | Circuit for allowing alternating-current electric equipment to form control signals at two states |
| CN103956886B (en) * | 2014-05-12 | 2016-10-05 | 上海阿卡得电子有限公司 | A kind of AC electric equipment forms the circuit of two states control signal |
| WO2015184832A1 (en) * | 2014-10-09 | 2015-12-10 | 中兴通讯股份有限公司 | Alternating current detection circuit |
| CN105572523A (en) * | 2014-10-09 | 2016-05-11 | 中兴通讯股份有限公司 | AC detection circuit |
| CN109917278A (en) * | 2019-03-29 | 2019-06-21 | 宁波奥克斯电气股份有限公司 | A kind of forceful electric power logic detection system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130731 Termination date: 20151214 |
|
| EXPY | Termination of patent right or utility model |