CN202256476U - Zero passage signal detection circuit - Google Patents
Zero passage signal detection circuit Download PDFInfo
- Publication number
- CN202256476U CN202256476U CN 201120373379 CN201120373379U CN202256476U CN 202256476 U CN202256476 U CN 202256476U CN 201120373379 CN201120373379 CN 201120373379 CN 201120373379 U CN201120373379 U CN 201120373379U CN 202256476 U CN202256476 U CN 202256476U
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- circuit
- resistance
- optocoupler
- zero cross
- cross signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model belongs to the field of air conditioning detection devices, and particularly relates to a zero passage signal detection circuit. The zero passage signal detection circuit comprises a zero passage signal detection circuit, a signal conversion circuit and a singlechip which are connected sequentially, wherein the zero passage signal detection circuit is also connected with an industrial frequency alternating current; the zero passage signal detection circuit comprises a capacitance-resistance voltage reduction circuit and a half-wave rectifying circuit; the signal conversion circuit comprises a triode amplification output circuit; one end of the capacitance-resistance voltage reduction circuit is connected with the industrial frequency alternating current, and the other end of the capacitance-resistance voltage reduction circuit is connected with the input end of the half-wave rectifying circuit; the output end of the half-wave rectifying circuit is connected with the input end of the triode amplification output circuit; and the output end of the triode amplification output circuit is connected with the singlechip as the output end of the zero passage signal. The utility model has the advantages of simple structure and low circuit power consumption.
Description
Technical field
The utility model belongs to air-conditioning pick-up unit field, is specifically related to a kind of zero cross signal testing circuit.
Background technology
In the prior art of air-conditioning control; The indoor set axial-flow fan generally adopts the PG motor, and the driving of PG motor generally realizes through controllable silicon, and the controllable silicon of using always in the air-condition circuits belongs to zero passage and automatically shuts down type; Silicon controlled is opened and need be controlled the pin input current signal to it; The zero cross signal testing circuit is exactly to be the controllable silicon input current signal, opens for it and finds reference point
A large amount of zero cross signal circuit that use in air-conditioning mainly are sampled as the master with resistance step-down or Industrial Frequency Transformer step-down at present, and resistance step-down power consumption is bigger, and the Industrial Frequency Transformer step-down needs special transformer, is not suitable for for high frequency switch power.
The utility model content
To the shortcoming of prior art, the purpose of the utility model provides a kind of simple in structure, the zero cross signal testing circuit that circuit power consumption is low.
For realizing above-mentioned purpose, the technical scheme of the utility model is:
A kind of zero cross signal testing circuit; Comprise the zero cross signal testing circuit, signaling conversion circuit, the single-chip microcomputer that connect successively; The zero cross signal testing circuit also is electrically connected with industrial frequency AC, and said zero cross signal testing circuit comprises resistance-capacitance depressurization circuit and half-wave rectifying circuit, and signaling conversion circuit comprises the triode amplification output circuit; One end of resistance-capacitance depressurization circuit is electrically connected with industrial frequency AC; The other end of resistance-capacitance depressurization circuit is connected with the input end of half-wave rectifying circuit, and the output terminal of half-wave rectifying circuit is connected with the input end of triode amplification output circuit, and the output terminal of triode amplification output circuit is connected with single-chip microcomputer as the output terminal of zero cross signal.
In the such scheme; The resistance-capacitance depressurization circuit comprises capacitor C 1, resistance R 1 and resistance R 2, and capacitor C 1 one ends are electrically connected with industrial frequency AC, and capacitor C 1 other end is connected with resistance R 2 one ends; Resistance R 2 other ends are connected with the input end of half-wave rectifying circuit, and resistance R 1 is parallelly connected with capacitor C 1.
In the such scheme, said zero cross signal testing circuit also comprises the current limliting divider resistance, and the output terminal of half-wave rectifying circuit is connected with the input end of triode amplification output circuit through the current limliting divider resistance.
In the such scheme, said signaling conversion circuit also comprises the optocoupler telecommunication circuit, and the input end of triode amplification output circuit is connected with the current limliting divider resistance through the optocoupler telecommunication circuit.
In the such scheme; Said optocoupler telecommunication circuit comprises optocoupler B1 and resistance R 3; First end of optocoupler B1 is connected with the current limliting divider resistance, and second end of optocoupler B1 is connected with half-wave rectifying circuit, and the 3rd end of optocoupler B1 is connected with the input end of triode amplification output circuit; The 3rd end of optocoupler B1 also is connected with power supply ground through resistance R 3, and the 4th end of optocoupler B1 is connected with power supply.
In the such scheme, said industrial-frequency alternating current is provided with live wire L and zero line N, and fiery L is connected with the resistance-capacitance depressurization circuit, and zero line N is connected with half-wave rectifying circuit.
In the such scheme; Half-wave rectifying circuit comprises diode V1, diode V2 and diode V3, and live wire L is connected with the anode of diode V1 through the resistance-capacitance depressurization circuit, and the anode of diode V1 also is connected with the negative electrode of diode V2; The negative electrode of diode V1 is connected with the current limliting divider resistance; Zero line N is connected with the anode of diode V2, and the anode of diode V2 also is connected with the negative electrode of diode V3, and the anode of diode V3 is connected with second end of optocoupler B1.
In the such scheme; Said triode amplification output circuit comprises triode V4, resistance R 4, resistance R 5; The base stage of triode V4 is connected with the 4th end of optocoupler B1 through resistance R 4; The emitter of triode V4 is connected with power supply ground, and the collector of triode V4 is connected with single-chip microcomputer as the output terminal of zero cross signal, and the collector of triode V4 also is connected with power supply through resistance R 5.
The beneficial effect of the utility model is:
The utility model is simple in structure, utilizes the power consumption of resistance-capacitance depressurization circuit reduction circuit, good energy-conserving effect, and cost is low.
Description of drawings
Fig. 1: the theory diagram that is the utility model;
Fig. 2: the circuit diagram that is the utility model;
Fig. 3: the zero cross signal output waveform that is the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to specify further, but the embodiment of the utility model is not limited thereto.
The utility model is as shown in Figure 1; A kind of zero cross signal testing circuit; Comprise the industrial-frequency alternating current, zero cross signal testing circuit 1, signaling conversion circuit 2, the single-chip microcomputer 3 that connect successively; Zero cross signal testing circuit 1 comprises resistance-capacitance depressurization circuit 11, half-wave rectifying circuit 12 and current limliting divider resistance 13; Signaling conversion circuit 2 comprises triode amplification output circuit 21 and optocoupler telecommunication circuit 22, and an end of resistance-capacitance depressurization circuit 11 is electrically connected with industrial frequency AC, and the other end of resistance-capacitance depressurization circuit 11 is connected with the input end of half-wave rectifying circuit 12; The output terminal of half-wave rectifying circuit 12 is connected with an end of current limliting divider resistance 13; The other end of current limliting divider resistance 13 is connected with the input end of optocoupler telecommunication circuit 22, and the output terminal of optocoupler telecommunication circuit 22 is connected with the input end of triode amplification output circuit 21, and the output terminal of triode amplification output circuit 21 is connected with single-chip microcomputer 3 as the output terminal of zero cross signal.
As shown in Figure 2, industrial-frequency alternating current is provided with live wire L and zero line N;
Resistance-capacitance depressurization circuit 11 comprises capacitor C 1, resistance R 1 and resistance R 2;
Half-wave rectifying circuit 12 comprises diode V1, diode V2 and diode V3;
Triode amplification output circuit 21 comprises triode V4, resistance R 4, resistance R 5;
In the resistance-capacitance depressurization circuit 11, capacitor C 1 one ends are connected with the live wire L of industrial-frequency alternating current, and capacitor C 1 other end is connected with resistance R 2 one ends, and resistance R 2 other ends are connected with the anode of the diode V1 of half-wave rectifying circuit 12, and resistance R 1 is parallelly connected with capacitor C 1.Wherein capacitor C 1 is a capacitance decompression, and resistance R 1 is capacitor C 1 discharge, and resistance R 2 prevents rush of current.
In the half-wave rectifying circuit 12; The anode of diode V1 is connected with the negative electrode of diode V2; The negative electrode of diode V1 is connected with current limliting divider resistance 13; The anode of diode V2 is connected with zero line N, and the anode of diode V2 also is connected with the negative electrode of diode V3, and the anode of diode V3 is connected with second end of optocoupler B1 in the optocoupler telecommunication circuit 22.
In the optocoupler telecommunication circuit 22; First end of optocoupler B1 is connected with current limliting divider resistance 13; The anode of diode V3 in second end of optocoupler B1 and the half-wave rectifying circuit 12 is connected, and the 3rd end of optocoupler B1 is connected with triode V4 through the resistance R 4 of triode amplification output circuit 21, and the 3rd end of optocoupler B1 also passes through resistance R 3 and is connected with power supply ground; The 4th end of optocoupler B1 is connected with power supply, and this power supply is+12 volts.
In the triode amplification output circuit 21; The base stage of triode V4 is connected with the 4th end of optocoupler B1 through resistance R 4; The emitter of triode V4 is connected with power supply ground; The collector of triode V4 is connected with single-chip microcomputer 3 as the output terminal of zero cross signal, and the collector of triode V4 also is connected with power supply through resistance R 5, and this place's power supply is+5 volts.
During work, when industrial-frequency alternating current was in sinusoidal wave positive half period, direction of current was following: L → C1 → R2 → V1 → 13 → B1 → V3 → N.This moment, optocoupler B1 forward conduction was exported high level signal to triode amplification output circuit 21, and triode amplification output circuit 21 output high level are to single-chip microcomputer 3.
When industrial-frequency alternating current was in sinusoidal wave negative half-cycle, direction of current was following: N → V2 → R2 → C1 → L.This moment, optocoupler B1 bore not conducting of reverse voltage, and the output low level signal is to triode amplification output circuit 21, and triode amplification output circuit 21 output low levels are to single-chip microcomputer 3.
As shown in Figure 2, use oscillograph test industrial frequency AC electrical waveform and triode amplification output circuit 21 waveforms for reality, wherein sine wave is the industrial frequency AC electrical waveform, square wave is the waveform of triode amplification output circuit 21.When industrial-frequency alternating current passes through capacitor C 1; Voltage is than electric current quadrature lagging; Therefore the zero cross signal that detects will postpone 5ms than actual zero cross signal; The high level signal positive half period more sinusoidal wave than alternating current that outputs to single-chip microcomputer 3 equally postpones 5ms, and the low level signal negative half-cycle more sinusoidal wave than alternating current that outputs to single-chip microcomputer 3 postpones 5ms.
Claims (8)
1. zero cross signal testing circuit; Comprise the zero cross signal testing circuit (1), signaling conversion circuit (2), the single-chip microcomputer (3) that connect successively; Zero cross signal testing circuit (1) also is electrically connected with industrial frequency AC; It is characterized in that said zero cross signal testing circuit (1) comprises resistance-capacitance depressurization circuit (11) and half-wave rectifying circuit (12), signaling conversion circuit (2) comprises triode amplification output circuit (21); One end of resistance-capacitance depressurization circuit (11) is electrically connected with industrial frequency AC; The other end of resistance-capacitance depressurization circuit (11) is connected with the input end of half-wave rectifying circuit (12), and the output terminal of half-wave rectifying circuit (12) is connected with the input end of triode amplification output circuit (21), and the output terminal of triode amplification output circuit (21) is connected with single-chip microcomputer (3) as the output terminal of zero cross signal.
2. zero cross signal testing circuit according to claim 1; It is characterized in that; Resistance-capacitance depressurization circuit (11) comprises capacitor C 1, resistance R 1 and resistance R 2, and capacitor C 1 one ends are electrically connected with industrial frequency AC, and capacitor C 1 other end is connected with resistance R 2 one ends; Resistance R 2 other ends are connected with the input end of half-wave rectifying circuit (12), and resistance R 1 is parallelly connected with capacitor C 1.
3. zero cross signal testing circuit according to claim 2; It is characterized in that; Said zero cross signal testing circuit (1) also comprises current limliting divider resistance (13), and the output terminal of half-wave rectifying circuit (12) is connected with the input end of triode amplification output circuit (21) through current limliting divider resistance (13).
4. zero cross signal testing circuit according to claim 3; It is characterized in that; Said signaling conversion circuit (2) also comprises optocoupler telecommunication circuit (22), and the input end of triode amplification output circuit (21) is connected with current limliting divider resistance (13) through optocoupler telecommunication circuit (22).
5. zero cross signal testing circuit according to claim 4; It is characterized in that said optocoupler telecommunication circuit (22) comprises optocoupler B1 and resistance R 3, first end of optocoupler B1 is connected with current limliting divider resistance (13); Second end of optocoupler B1 is connected with half-wave rectifying circuit (12); The 3rd end of optocoupler B1 is connected with the input end of triode amplification output circuit (21), and the 3rd end of optocoupler B1 also is connected with power supply ground through resistance R 3, and the 4th end of optocoupler B1 is connected with power supply.
6. zero cross signal testing circuit according to claim 5 is characterized in that, said industrial-frequency alternating current is provided with live wire L and zero line N, and fiery L is connected with resistance-capacitance depressurization circuit (11), and zero line N is connected with half-wave rectifying circuit (12).
7. zero cross signal testing circuit according to claim 6; It is characterized in that; Half-wave rectifying circuit (12) comprises diode V1, diode V2 and diode V3, and live wire L is connected with the anode of diode V1 through resistance-capacitance depressurization circuit (11), and the anode of diode V1 also is connected with the negative electrode of diode V2; The negative electrode of diode V1 is connected with current limliting divider resistance (13); Zero line N is connected with the anode of diode V2, and the anode of diode V2 also is connected with the negative electrode of diode V3, and the anode of diode V3 is connected with second end of optocoupler B1.
8. zero cross signal testing circuit according to claim 7; It is characterized in that; Said triode amplification output circuit (21) comprises triode V4, resistance R 4, resistance R 5, and the base stage of triode V4 is connected with the 4th end of optocoupler B1 through resistance R 4, and the emitter of triode V4 is connected with power supply ground; The collector of triode V4 is connected with single-chip microcomputer (3) as the output terminal of zero cross signal, and the collector of triode V4 also is connected with power supply through resistance R 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120373379 CN202256476U (en) | 2011-09-30 | 2011-09-30 | Zero passage signal detection circuit |
| PCT/CN2012/070395 WO2013044602A1 (en) | 2011-09-30 | 2012-01-16 | Zero-crossing signal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120373379 CN202256476U (en) | 2011-09-30 | 2011-09-30 | Zero passage signal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256476U true CN202256476U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120373379 Expired - Fee Related CN202256476U (en) | 2011-09-30 | 2011-09-30 | Zero passage signal detection circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202256476U (en) |
| WO (1) | WO2013044602A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103683956A (en) * | 2013-12-23 | 2014-03-26 | 上海贝岭股份有限公司 | Low-power-consumption capacitive alternating-current voltage signal conversion circuit |
| CN107525961A (en) * | 2016-06-22 | 2017-12-29 | 南京理工大学 | AC signal zero crossing point detection device |
| CN108872695A (en) * | 2018-07-04 | 2018-11-23 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero passage signal detection circuit and signal transmission through fiber system |
| CN111736009A (en) * | 2020-07-21 | 2020-10-02 | 追创科技(苏州)有限公司 | Zero-crossing detection circuit and electronic equipment |
| CN112415260A (en) * | 2020-12-02 | 2021-02-26 | 中山市优胜电子科技有限公司 | Isolated form singlechip alternating current zero crossing signal detection circuitry |
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| CN103499732B (en) * | 2013-09-29 | 2016-09-14 | 湘潭大学 | A kind of two-way zero-crossing testing circuit |
| CN103743940B (en) * | 2014-01-24 | 2016-03-09 | 镇江天力变压器有限公司 | A kind of zero cross detection circuit of the power supply of high-frequency dust removing accurately resonance current |
| CN107425834B (en) * | 2017-06-26 | 2023-07-07 | 青岛东软载波科技股份有限公司 | Power line zero-crossing modulation circuit |
| CN107345989B (en) * | 2017-08-03 | 2023-05-23 | 合肥华耀电子工业有限公司 | Open-phase detection circuit of three-phase input power supply |
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| CN110043502B (en) * | 2019-05-28 | 2024-04-12 | 深圳市泛邦通用科技有限公司 | Ceiling fan and controller thereof |
| CN114184830A (en) * | 2021-11-01 | 2022-03-15 | 杭州涂鸦信息技术有限公司 | Zero-crossing detection circuit and electronic equipment |
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| JP2004279278A (en) * | 2003-03-17 | 2004-10-07 | Sharp Corp | Electric power source unit |
| CN201110615Y (en) * | 2007-10-29 | 2008-09-03 | 珠海格力电器股份有限公司 | Zero-crossing signal detection circuit of air conditioner controller and air conditioner |
| CN201150035Y (en) * | 2007-12-29 | 2008-11-12 | 深圳和而泰智能控制股份有限公司 | Resistance-capacitance step-down power supply circuit with zero crossing detection function |
| CN101738535A (en) * | 2008-11-21 | 2010-06-16 | 上海电机学院 | Alternating voltage zero-crossing detection circuit for power factor correction control circuit |
| CN102012455A (en) * | 2010-11-03 | 2011-04-13 | 苏州合欣美电子科技有限公司 | Zero-crossing detection circuit |
| CN102062810A (en) * | 2010-12-14 | 2011-05-18 | 江苏大学 | Detection circuit and method for zero crossing point of alternating current power supply |
-
2011
- 2011-09-30 CN CN 201120373379 patent/CN202256476U/en not_active Expired - Fee Related
-
2012
- 2012-01-16 WO PCT/CN2012/070395 patent/WO2013044602A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683956A (en) * | 2013-12-23 | 2014-03-26 | 上海贝岭股份有限公司 | Low-power-consumption capacitive alternating-current voltage signal conversion circuit |
| CN107525961A (en) * | 2016-06-22 | 2017-12-29 | 南京理工大学 | AC signal zero crossing point detection device |
| CN108872695A (en) * | 2018-07-04 | 2018-11-23 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero passage signal detection circuit and signal transmission through fiber system |
| CN108872695B (en) * | 2018-07-04 | 2020-08-14 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero-crossing signal detection circuit and optical fiber signal transmission system |
| CN111736009A (en) * | 2020-07-21 | 2020-10-02 | 追创科技(苏州)有限公司 | Zero-crossing detection circuit and electronic equipment |
| CN112415260A (en) * | 2020-12-02 | 2021-02-26 | 中山市优胜电子科技有限公司 | Isolated form singlechip alternating current zero crossing signal detection circuitry |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013044602A1 (en) | 2013-04-04 |
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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: 20120530 Termination date: 20170930 |
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| CF01 | Termination of patent right due to non-payment of annual fee |