CN202305652U - On-off controllable zero-crossing detection circuit - Google Patents
On-off controllable zero-crossing detection circuit Download PDFInfo
- Publication number
- CN202305652U CN202305652U CN 201120419160 CN201120419160U CN202305652U CN 202305652 U CN202305652 U CN 202305652U CN 201120419160 CN201120419160 CN 201120419160 CN 201120419160 U CN201120419160 U CN 201120419160U CN 202305652 U CN202305652 U CN 202305652U
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- optocoupler
- detection circuit
- circuit
- zero
- crossing detection
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Abstract
An on-off controllable zero-crossing detection circuit solves the technical problem of energy waste of a zero-crossing detection circuit in a standby mode. The technical scheme includes that the zero-crossing detection circuit structurally comprises an optical coupling detection circuit consisting of a first optical coupler and matched components, and is characterized in that a switch control circuit is additionally arranged in the optical coupling detection circuit, and a led control end of the switch control circuit is connected with a peripheral. The on-off controllable zero-crossing detection circuit has the advantages that after the switch control circuit is additionally arranged in the circuit, the zero-crossing detection circuit is safe and reliable, can be in normal operation and can be switched off at proper time, so that energy waste of the zero-crossing detection circuit in the standby mode is effectively reduced.
Description
Technical field
The utility model relates to a kind of zero cross detection circuit, belongs to the electrical technical field, the zero cross detection circuit that particularly a kind of may command is turn-offed.
Background technology
The optocoupler testing circuit that most of zero cross detection circuits all are made up of optocoupler and kit in the prior art; Input end constantly with electrical network in live wire and zero line join; As long as between live wire and the zero line forward voltage is arranged; Input circuit just has electric current to flow through, and these electric currents finally convert thermal energy consumption to and fall.When the zero passage testing circuit is in standby mode, need not detect, but circuit causes the waste of the energy still in work.To the appearance of above problem, prior art does not well solve, and has normally brought trouble to this area work.
Summary of the invention
The utility model will solve zero cross detection circuit causes energy dissipation when standby mode technical matters, and the utility model has designed the zero cross detection circuit that a kind of may command is turn-offed, and in circuit structure, sets up an ON-OFF control circuit; Make circuit when standby mode; Not conducting of input circuit, output circuit cuts out, and circuit safety is reliable; Both can operate as normal, can reduce the waste of the energy again.
The utility model for realizing the technical scheme that goal of the invention adopts is; The zero cross detection circuit that a kind of may command is turn-offed; Comprise the optocoupler testing circuit of forming by the first optocoupler U1 and kit in the circuit structure; Key is: in the optocoupler testing circuit, set up ON-OFF control circuit, the control end of drawing of ON-OFF control circuit is connected with peripheral hardware.
The beneficial effect of the utility model is through setting up a simple ON-OFF control circuit structure; Realized the zero cross detection circuit that a kind of may command is turn-offed, made circuit safety reliable, can either normally detect; Again can be when standby mode in good time breaking circuit, realized the purpose of energy savings.
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
In the accompanying drawing, R1, R2 are current-limiting resistances, and R3, R4 are resistance, and D1, D2 are commutation diodes, and U1 is first optocoupler, and U2 is second optocoupler, and L is a live wire, and N is a zero line, and VCC is a dc power supply terminal.
Embodiment
Referring to accompanying drawing; The zero cross detection circuit that a kind of may command is turn-offed; Comprise the optocoupler testing circuit of being made up of the first optocoupler U1 and kit in the circuit structure, key is: in the optocoupler testing circuit, set up ON-OFF control circuit, the control end of drawing of ON-OFF control circuit is connected with peripheral hardware.
Comprise current-limiting resistance, commutation diode D1 and D2 in the above-mentioned optocoupler testing circuit structure; The first input end of the first optocoupler U1 is connected with live wire L with commutation diode D1 by current-limiting resistance; Second input end is connected with the output terminal of ON-OFF control circuit, the output terminal output optocoupler detection signal of the first optocoupler U1.
Comprise resistance R 4 in the above-mentioned ON-OFF control circuit structure, reach the second optocoupler U2; The input end of second optocoupler is connected with peripheral hardware by resistance R 4; The control output end of the second optocoupler U2 is connected with second input end of the first optocoupler U1, and another output terminal of the second optocoupler U2 is connected with zero line N.
The utility model is when concrete the use: during when optocoupler testing circuit operate as normal; Peripheral hardware is a high voltage to the ON-OFF control circuit input; The input end conducting of the second optocoupler U2; Output terminal also is in opening state, makes optocoupler testing circuit operate as normal, the output terminal output optocoupler detection signal of the first optocoupler U1.When the optocoupler testing circuit is in standby mode; Peripheral hardware is a low-voltage to the ON-OFF control circuit input; The not conducting of input end of the second optocoupler U2; Output terminal does not have electric current, and making does not have electric current to flow through yet in the optocoupler testing circuit, has significantly reduced the energy dissipation that zero cross detection circuit causes when standby mode.
Claims (3)
1. the zero cross detection circuit that turn-offs of a may command; Comprise the optocoupler testing circuit of forming by first optocoupler (U1) and kit in the circuit structure; It is characterized in that: in the optocoupler testing circuit, set up ON-OFF control circuit, the control end of drawing of ON-OFF control circuit is connected with peripheral hardware.
2. the zero cross detection circuit that a kind of may command according to claim 1 is turn-offed; It is characterized in that: comprise current-limiting resistance, commutation diode in the described optocoupler testing circuit structure; The first input end of first optocoupler (U1) is connected with live wire (L) with commutation diode (D1) by current-limiting resistance; Second input end is connected with the output terminal of ON-OFF control circuit, the output terminal output optocoupler detection signal of first optocoupler (U1).
3. the zero cross detection circuit that a kind of may command according to claim 1 is turn-offed; It is characterized in that: comprise resistance (R4) in the described ON-OFF control circuit structure, reach second optocoupler (U2); The input end of second optocoupler (U2) is connected with peripheral hardware by resistance (R4); The control output end of second optocoupler (U2) is connected with second input end of first optocoupler (U1), and another output terminal of second optocoupler (U2) is connected with zero line (N).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120419160 CN202305652U (en) | 2011-10-28 | 2011-10-28 | On-off controllable zero-crossing detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120419160 CN202305652U (en) | 2011-10-28 | 2011-10-28 | On-off controllable zero-crossing detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305652U true CN202305652U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120419160 Expired - Lifetime CN202305652U (en) | 2011-10-28 | 2011-10-28 | On-off controllable zero-crossing detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305652U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103784099A (en) * | 2012-10-26 | 2014-05-14 | 美的集团股份有限公司 | Zero cross detection circuit and dish-washing machine |
| CN104991111A (en) * | 2015-06-30 | 2015-10-21 | 重庆大学 | Wide-range alternating current signal zero-cross detection method and device |
| CN106199318A (en) * | 2016-06-23 | 2016-12-07 | 潍坊五洲浩特电气有限公司 | A kind of Intelligent line inspection instrument being applied to ammeter box |
-
2011
- 2011-10-28 CN CN 201120419160 patent/CN202305652U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103784099A (en) * | 2012-10-26 | 2014-05-14 | 美的集团股份有限公司 | Zero cross detection circuit and dish-washing machine |
| CN104991111A (en) * | 2015-06-30 | 2015-10-21 | 重庆大学 | Wide-range alternating current signal zero-cross detection method and device |
| CN106199318A (en) * | 2016-06-23 | 2016-12-07 | 潍坊五洲浩特电气有限公司 | A kind of Intelligent line inspection instrument being applied to ammeter box |
| CN106199318B (en) * | 2016-06-23 | 2018-12-25 | 潍坊五洲浩特电气有限公司 | A kind of Intelligent line inspection instrument applied to ammeter box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |