CN201955388U - Low-power zero-crossing detection circuit of power line carrier - Google Patents
Low-power zero-crossing detection circuit of power line carrier Download PDFInfo
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- CN201955388U CN201955388U CN2011200440323U CN201120044032U CN201955388U CN 201955388 U CN201955388 U CN 201955388U CN 2011200440323 U CN2011200440323 U CN 2011200440323U CN 201120044032 U CN201120044032 U CN 201120044032U CN 201955388 U CN201955388 U CN 201955388U
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- detection circuit
- resistance
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- line carrier
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Abstract
The utility model relates to a zero-crossing detection circuit, in particular a low-power zero-crossing detection circuit for communication of a power line carrier, which comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a diode D1 and an optoelectronic coupler OP1. The terminal N of the low-power zero-crossing detection circuit of the power line carrier is connected with a zero wire input, and the terminal L of the low-power zero-crossing detection circuit of the power line carrier is connected with a live wire input. By adopting the principle of half wave rectification, the power consumption of the zero-crossing detection circuit is reduced to half of the original power consumption. Moreover, the input circuit and the output circuit are electrically and completely isolated, and the low-power zero-crossing detection circuit has high interference resistance.
Description
Technical field
The utility model relates to a kind of zero cross detection circuit, particularly a kind of low-power consumption zero cross detection circuit that is used for power line carrier communication.
Background technology
Along with the continuous development of power-line carrier communication, people are more and more higher to the synchronous requirement of carrier data transmission, thereby the requirement of the accuracy that the zero crossing of ac grid voltage is detected is also improving constantly.Zero cross detection circuit commonly used at present exists reliability low, the defective of poor anti jamming capability.
Summary of the invention
The purpose of this utility model is exactly in order to overcome above-mentioned the deficiencies in the prior art part, and a kind of low-power consumption power line carrier zero cross detection circuit is provided, and its circuit structure is simple, and has low cost, low-power consumption, high precision, characteristics that antijamming capability is strong.
The purpose of this utility model realizes by following technical measures: low-power consumption power line carrier zero cross detection circuit, comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, diode D1, photoelectrical coupler OP1, the N termination zero line input of its described low-power consumption power line carrier zero cross detection circuit, the input of L termination live wire, the L end is connected to the 1 pin input end of photoelectrical coupler OP1 by diode D1, resistance R 1, resistance R 2, resistance R 3, the positive pole of L terminating diode D1, the N end is connected to the 2 pin input ends of photoelectrical coupler OP1; The output terminal of photoelectrical coupler OP1 is connected to operating voltage VCC through resistance R 4; The 3 pin output head groundings of photoelectrical coupler OP1.
In technique scheme, the signal output part of described low-power consumption power line carrier zero cross detection circuit is the P1 end, and the P1 end links to each other with the 4 pin output terminals of photoelectrical coupler OP1.
The beneficial effect of the utility model low-power consumption power line carrier zero cross detection circuit is: 1. input circuit and output circuit are isolated on electric fully, and antijamming capability is strong; 2. using the half-wave rectification principle makes the power consumption of zero cross detection circuit be reduced to original half.
Description of drawings
Fig. 1 is the circuit connection diagram of the utility model low-power consumption power line carrier zero cross detection circuit.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
A kind of low-power consumption power line carrier zero cross detection circuit that present embodiment provides, it comprises: resistance R 1, resistance R 2, resistance R 3, resistance R 4, diode D1, photoelectrical coupler OP1.
As shown in Figure 1, the N termination zero line input of its described low-power consumption power line carrier zero cross detection circuit, the input of L termination live wire, the L end is connected to the 1 pin input end of photoelectrical coupler OP1 by diode D1, resistance R 1, resistance R 2, resistance R 3, the positive pole of L terminating diode D1, the N end is connected to the 2 pin input ends of photoelectrical coupler OP1; The output terminal of photoelectrical coupler OP1 is connected to operating voltage VCC through resistance R 4; The signal output part of described low-power consumption power line carrier zero cross detection circuit is the P1 end, and the P1 end links to each other the 3 pin output head groundings of photoelectrical coupler OP1 with the 4 pin output terminals of photoelectrical coupler OP1.
When alternating current is sinusoidal wave positive half cycle, diode D1 conducting, electric current is gone into circuit through the L termination, is connected to the N end through the input end of resistance R 1, resistance R 2, resistance R 3, photoelectrical coupler OP1, photoelectrical coupler OP1 conducting, the P1 signal output part is a low level; When alternating current was the negative half period of sine wave, diode D1 ended, and photoelectrical coupler OP1 input end no current, P1 signal output part are high level under the effect of pull-up resistor R4.
Claims (2)
1. low-power consumption power line carrier zero cross detection circuit, comprise resistance R 1, resistance R 2, resistance R 3, resistance R 4, diode D1, photoelectrical coupler OP1, it is characterized in that: the N termination zero line input of described low-power consumption power line carrier zero cross detection circuit, the input of L termination live wire, the L end is connected to the 1 pin input end of photoelectrical coupler OP1 by diode D1, resistance R 1, resistance R 2, resistance R 3, the positive pole of diode D1 links to each other with the L end, and the N end is connected to the 2 pin input ends of photoelectrical coupler OP1; The output terminal of photoelectrical coupler OP1 is connected to operating voltage VCC through resistance R 4; The 3 pin output head groundings of photoelectrical coupler OP1.
2. low-power consumption power line carrier zero cross detection circuit according to claim 1 is characterized in that: the signal output part of described low-power consumption power line carrier zero cross detection circuit is the P1 end, and the P1 end links to each other with the 4 pin output terminals of photoelectrical coupler OP1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200440323U CN201955388U (en) | 2011-02-22 | 2011-02-22 | Low-power zero-crossing detection circuit of power line carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200440323U CN201955388U (en) | 2011-02-22 | 2011-02-22 | Low-power zero-crossing detection circuit of power line carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955388U true CN201955388U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200440323U Expired - Fee Related CN201955388U (en) | 2011-02-22 | 2011-02-22 | Low-power zero-crossing detection circuit of power line carrier |
Country Status (1)
| Country | Link |
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| CN (1) | CN201955388U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389401A (en) * | 2013-07-15 | 2013-11-13 | 汕头市超声仪器研究所有限公司 | Power grid voltage detection device |
| CN105891589A (en) * | 2016-05-26 | 2016-08-24 | 宁波三星医疗电气股份有限公司 | Zero crossing detection circuit for power lines and manufacturing method of zero crossing detection circuit |
| CN105954587A (en) * | 2016-05-26 | 2016-09-21 | 宁波三星医疗电气股份有限公司 | Harmonic wave detection circuit of distribution system and harmonic wave detection method of harmonic wave detection circuit |
| CN113110210A (en) * | 2021-04-29 | 2021-07-13 | 余姚市富运电子科技有限公司 | Vehicle-mounted water storage and heating system |
-
2011
- 2011-02-22 CN CN2011200440323U patent/CN201955388U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389401A (en) * | 2013-07-15 | 2013-11-13 | 汕头市超声仪器研究所有限公司 | Power grid voltage detection device |
| CN103389401B (en) * | 2013-07-15 | 2015-11-25 | 汕头市超声仪器研究所有限公司 | A kind of electric network voltage detection device |
| CN105891589A (en) * | 2016-05-26 | 2016-08-24 | 宁波三星医疗电气股份有限公司 | Zero crossing detection circuit for power lines and manufacturing method of zero crossing detection circuit |
| CN105954587A (en) * | 2016-05-26 | 2016-09-21 | 宁波三星医疗电气股份有限公司 | Harmonic wave detection circuit of distribution system and harmonic wave detection method of harmonic wave detection circuit |
| CN105954587B (en) * | 2016-05-26 | 2018-11-30 | 宁波三星医疗电气股份有限公司 | A kind of harmonics detection circuit and its detection method of distribution system |
| CN105891589B (en) * | 2016-05-26 | 2018-12-25 | 宁波三星医疗电气股份有限公司 | A kind of zero cross detection circuit and preparation method thereof for power line |
| CN113110210A (en) * | 2021-04-29 | 2021-07-13 | 余姚市富运电子科技有限公司 | Vehicle-mounted water storage and heating system |
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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: 20110831 Termination date: 20150222 |
|
| EXPY | Termination of patent right or utility model |