CN204482072U - A kind of single live wire switching circuit - Google Patents
A kind of single live wire switching circuit Download PDFInfo
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- CN204482072U CN204482072U CN201420776006.3U CN201420776006U CN204482072U CN 204482072 U CN204482072 U CN 204482072U CN 201420776006 U CN201420776006 U CN 201420776006U CN 204482072 U CN204482072 U CN 204482072U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a kind of single live wire switching circuit, comprise the first terminals, the second terminals, isolating switch module, ON state electricity-fetching module, rectifier bridge, AC-DC conversion module, voltage reduction module and switch control module.When standby, by AC-DC conversion module, 220V or 110V alternating current is converted to 6V direct current, the voltage obtaining 3V by the further step-down of voltage reduction module is again powered to MCU chip, make circuit and standby time the electric current that need consume little, be less than the starting current of LED, and the minimum starting current of electricity-saving lamp and incandescent lamp is higher than the starting current of LED, thus there will not be light fixture scintillation, the long service life of light fixture.
Description
Technical field
The utility model relates to lighting control technique field, particularly one list live wire switching circuit.
Background technology
In daily life, single live wire lighting switch is generally controlled by simple mechanical switch, is controlled the closed of a live wire and is disconnected, and then control the open and close of light fixture by mechanical switch.At present, the light fixture of part corridor is also had to adopt capacitor type touch switch control lighting of light fixture and extinguish.
All there is some shortcoming in these two kinds of switches, wherein: mechanical switch has certain mechanical endurance, and capacitor type touch switch easily produces misoperation, and antijamming capability is poor.
And single live wire also have some problems need be resolved: one, single live wire power getting is generally the power taking when power-supply circuit is connected with load (as light fixture), and the voltage got is dropped to low-voltage direct, power to the components and parts of front end (as MCU), therefore the components and parts of front end need to keep the state always run, like this will current sinking, and owing to being the circuit of series connection, make in light fixture, to have electric current to flow through, and the starting current of common LED and incandescent lamp is very little, when loop current is greater than the starting current of light fixture, just there will be the problem of light fixture flicker, cause the reduced lifetime of light fixture, two, when single live wire, power supply generally can not make insulating power supply, add the risk of electric shock, the method of current this problem of solution often adopts the mode of relay conducting, but adopting the method to there will be relay when loop current is minimum can not the situation of normal adhesive, causes switch normally not start.
Thus prior art need to improve.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of single live wire switching circuit, can prevent light fixture from glimmering and energy insulating power supply.
In order to achieve the above object, the utility model takes following technical scheme:
A kind of single live wire switching circuit, it comprises:
For connecting the first terminals and second terminals of single live wire;
For maintaining the ON state electricity-fetching module of the power supply of single live wire switching circuit when single live wire switch conduction;
Isolating switch module;
The rectifier bridge be made up of the first diode, the second diode, the 3rd diode and the 4th diode;
For alternating current is converted to galvanic AC-DC conversion module;
Voltage for exporting AC-DC conversion module carries out the voltage reduction module that step-down process is powered to MCU chip;
For controlling the switch control module of the conducting of isolating switch module and disconnection;
Described first terminals are connected the input of MCU chip successively with voltage reduction module by AC-DC conversion module, also be connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge with the 2nd end by the 1st end of isolating switch module, the output of described MCU chip connects the 4th end of isolating switch module by switch control module, 3rd end of described isolating switch module connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, 3rd end of described rectifier bridge connects the 2nd end of ON state electricity-fetching module, 3rd end of described ON state electricity-fetching module connects described second terminals.
In described single live wire switching circuit, described isolating switch module comprises controllable silicon unit and isolated location, 3rd end of described controllable silicon unit is connected the 2nd end and the 1st end of described isolated location with the 4th end correspondence, described first terminals are connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge by the 1st end of controllable silicon unit with the 2nd end, 3rd end of described isolated location connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described isolated location.
In described single live wire switching circuit, described controllable silicon unit comprises the first controllable silicon, the first resistance, the second resistance and the first electric capacity; Described first terminals are connected described first silicon controlled the 1st end, are also connected the 1st end of the first silicon controlled the 3rd end and isolated location by the first resistance, be also connected the 1st end of the first silicon controlled the 3rd end and isolated location by the first electric capacity, and described first silicon controlled the 2nd end is connected the 1st end of the 1st end of ON state electricity-fetching module and rectifier bridge, is also connected the 2nd end of isolated location by the second resistance.
In described single live wire switching circuit, described isolated location comprises opto-coupler chip, 1st end of described opto-coupler chip connects the first silicon controlled the 3rd end, 2nd end of described opto-coupler chip connects one end of the second resistance, 3rd end of described opto-coupler chip connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described opto-coupler chip.
In described single live wire switching circuit, described isolating switch module comprises relay, described first terminals are connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge by the 1st end of relay with the 2nd end, 3rd end of described relay connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described relay.
In described single live wire switching circuit, described switch control module comprises metal-oxide-semiconductor, the 3rd resistance and the 4th resistance, the source ground of described metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor connects the 4th end of opto-coupler chip by the 3rd resistance, the grid of described metal-oxide-semiconductor connects the output of MCU chip by the 4th resistance.
In described single live wire switching circuit, described AC-DC conversion module comprises AC-DC conversion chip, the second electric capacity, the 3rd electric capacity, the 5th resistance, the 5th diode and the 6th diode; Described first terminals also connect the positive pole of the 5th diode, the negative pole of described 5th diode connects the input of described AC-DC conversion chip by the 5th resistance, the input of described AC-DC conversion chip is also by the second capacity earth, the earth terminal ground connection of described AC-DC conversion chip, the output of described AC-DC conversion chip is by the 3rd capacity earth, also connect the positive pole of the 6th diode, the negative pole of described 6th diode connects the 3rd end of the input of voltage reduction module, the 2nd end of rectifier bridge and opto-coupler chip.
In described single live wire switching circuit, described voltage reduction module comprises step-down chip, the 7th diode and the 5th electric capacity, the Vin of described step-down chip holds the negative pole of connection the 6th diode cathode and the 7th diode, the plus earth of the 7th diode, the Vout end of described step-down chip connects the input of MCU chip, also by the 5th capacity earth.
In described single live wire switching circuit, described ON state electricity-fetching module comprises: the second controllable silicon, first voltage stabilizing didoe, second voltage stabilizing didoe and fuse, described second silicon controlled the 1st end connects the 1st end of rectifier bridge, the other end of the second resistance and the first silicon controlled the 2nd end, second silicon controlled the 2nd end connects the 3rd end of rectifier bridge and the negative pole of the first voltage stabilizing didoe, also connect described second terminals by fuse, the positive pole of described first voltage stabilizing didoe connects the positive pole of the second voltage stabilizing didoe, the negative pole of the second voltage stabilizing didoe connects the second silicon controlled the 3rd end.
In described single live wire switching circuit, also comprise for receiving wireless control signal that outside mobile terminal sends and making MCU chip export the wireless module of low and high level signal according to the wireless control signal received; The output of described wireless module connects the input of MCU chip.
Compared to prior art, single live wire switching circuit that the utility model provides, when standby, by AC-DC conversion module, 220V or 110V alternating current is converted to 6V direct current, then the voltage obtaining 3V by the further step-down of voltage reduction module is powered to MCU chip, make circuit and standby time the electric current that need consume little, be less than the starting current of LED, and the minimum starting current of electricity-saving lamp and incandescent lamp is higher than the starting current of LED, thus the phenomenon that there will not be light fixture to glimmer, the long service life of light fixture.The utility model opens and closes by controlling silicon controlled module, realize the break-make of single live wire, do not need to use relay, can realize minimizing of starting current, switch is highly sensitive, life-span is long, and the utility model list live wire switching circuit can coordinate proximity transducer work, is controlled, without contact-making switch near the on and off of proximity transducer to light fixture by object, there will not be electric shock, security performance significantly promotes.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model list live wire switching circuit.
Fig. 2 is the circuit diagram of another embodiment of the isolating switch module of the utility model list live wire switching circuit.
Fig. 3 is the utility model list live wire switching circuit application principle schematic diagram.
Embodiment
The utility model provides a kind of single live wire switching circuit, for making the purpose of this utility model, technical scheme and effect clearly, clearly, further describes the utility model referring to the accompanying drawing embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, it is the circuit diagram of the utility model list live wire switching circuit.Single live wire switching circuit of the present utility model and the MCU chip and the proximity transducer work that coordinate outside, realize the operating state of non-contacting mode control load (as light fixture).
As shown in Figure 1, the utility model list live wire switching circuit comprises the first terminals TP1, the second terminals TP2, isolating switch module 11, ON state electricity-fetching module 12, rectifier bridge 13, AC-DC conversion module 14, voltage reduction module 15 and switch control module 16.Wherein, described rectifier bridge 13 is made up of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4.
Please continue to refer to Fig. 1, described first terminals TP1 and the second terminals TP2 are for being connected single live wire.Wherein, described first terminals TP1 is connected the input of MCU chip successively with voltage reduction module 15 by AC-DC conversion module 14, (namely the first terminals TP1 is also connected the 1st end of isolating switch module 11 to 1st end of the 1st end being also connected ON state electricity-fetching module 12 by the 1st end of isolating switch module 11 with the 2nd end and rectifier bridge 13, 2nd end of isolating switch module 11 connects the 1st end of ON state electricity-fetching module 12 and the 1st end of rectifier bridge 13), described AC-DC conversion module 14 is for being converted to 6V direct current by 220V or 110V alternating current, described voltage reduction module 15 carries out step-down process output 3V direct current for the voltage exported AC-DC conversion module 14 and powers to MCU chip.
The output of described MCU chip connects the 4th end of isolating switch module 11 by switch control module 16, described switch control module 16 is for controlling the open and close of isolating switch module 11.3rd end of described isolating switch module 11 connects the 2nd end of rectifier bridge 13, the output of AC-DC conversion module 14 and the input of voltage reduction module 15.3rd end of described rectifier bridge 13 connects the 2nd end of ON state electricity-fetching module 12, and the 3rd end of described ON state electricity-fetching module 12 connects described second terminals TP2, and described ON state electricity-fetching module 12 is for maintaining the power supply of single live wire switching circuit when single live wire switch conduction.
Described MCU chip is the external control chip of single live wire switching circuit, is exported the open and close of low and high level Signal-controlled switch control module 16 by MCU chip.When control switch control module 16 is opened, isolating switch module 11 conducting, i.e. the 3rd end of isolating switch module 11 and the 4th end conducting, thus the 1st end and the 2nd end conducting, make the electric current inputted from the second terminals TP2 light light fixture by ON state electricity-fetching module 12 and isolating switch module 11 from the first terminals TP1 outflow successively; When control switch control module 16 is closed, described single live wire switching circuit is in holding state, and the electric current now on single live wire only has about 30 microamperes, there will not be the phenomenon that light fixture glimmers.
Please continue to refer to Fig. 1, described isolating switch module 11 comprises controllable silicon unit 110 and isolated location 111, 3rd end of described controllable silicon unit 110 is connected the 2nd end and the 1st end of described isolated location 111 with the 4th end correspondence, described first terminals TP1 is connected the 1st end of ON state electricity-fetching module 12 and the 1st end of rectifier bridge 13 by the 1st end of controllable silicon unit 110 with the 2nd end, 3rd end of described isolated location 111 connects the 2nd end of rectifier bridge 13, the output of AC-DC conversion module 14 and the input of voltage reduction module 15, 4th end connecting valve control module 16 of described isolated location 111.When 11 conducting of described isolating switch module, the first conducting of isolated location 111, and then controllable silicon unit 110 is opened, achieve the isolated controlling of signal of telecommunication break-make, improve fail safe.
Further, described controllable silicon unit 110 comprises the first controllable silicon U1, the first resistance R1, the second resistance R2 and the first electric capacity C1; Described first terminals TP1 connect described first controllable silicon U1 the 1st end, also by the first resistance R1 connect the first controllable silicon U1 1st end of the 3rd end with isolated location 111, be also connected the 3rd end of the first controllable silicon U1 and the 1st end of isolated location 111 by the first electric capacity C1, the 2nd end of described first controllable silicon U1 is connected the 1st end of the 1st end of ON state electricity-fetching module 12 and rectifier bridge 13, is also connected the 2nd end of isolated location 111 by the second resistance R2; Described first controllable silicon U1 is bidirectional triode thyristor, by zero passage detection, realizes conducting or shutoff; Described controllable silicon unit 110, under the condition that loop current is very little, adopts the zero passage detection of the first controllable silicon U1, triggers the first controllable silicon U1 conducting or shutoff, thus achieves the control to single live wire turn-on and turn-off.
Described first isolated location 111 comprises opto-coupler chip U2,1st end of described opto-coupler chip connects the first silicon controlled the 3rd end, 2nd end of described opto-coupler chip connects one end of the second resistance, 3rd end of described opto-coupler chip connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described opto-coupler chip; Described first isolated location 111 controls the break-make of the 1st end and the 2nd end by the 3rd end of opto-coupler chip U2 and the break-make of the 4th end, achieves the isolated controlling of signal of telecommunication break-make, improves fail safe.
Refer to Fig. 2, in other embodiments of the utility model, described isolating switch module 11 comprises relay J 1, and namely relay J 1 can replace controllable silicon unit in an embodiment and isolated location, realizes the isolated controlling of signal of telecommunication break-make.Refer to Fig. 1 and Fig. 2, described first terminals TP1 is connected the 1st end of ON state electricity-fetching module 12 and the 1st end of rectifier bridge 13 by the 1st end of relay J 1 with the 2nd end, 3rd end of described relay J 1 connects the 2nd end of rectifier bridge 13, the output of AC-DC conversion module 14 and the input of voltage reduction module 15, the 4th end connecting valve control module 16 of described relay J 1.When control switch control module 16 is opened, the normally opened contact adhesive of relay J 1, makes the electric current inputted from the second terminals TP2 successively by ON state electricity-fetching module 12 and relay J 1, flows out light light fixture from the first terminals TP1; When control switch control module 16 is closed, single live wire switching circuit is in holding state, and the electric current now on single live wire only has about 30 microamperes, there will not be the phenomenon that light fixture glimmers.
Further, in other embodiments of the utility model, described isolating switch module 11 also comprises diode D10, and the negative pole of described diode D10 connects the 3rd end of relay J 1, and the positive pole of diode D10 connects the 4th end of relay J 1.This diode D10 is used for preventing current reflux, makes the working stability of relay J 1 reliable.
In single live wire switching circuit that the utility model provides, described isolating switch module 11 can also coordinate the combination of other electronic components to form by bidirectional triode thyristor, relay, opto-coupler chip, the utility model is not construed as limiting, as long as can realize the isolated controlling of signal of telecommunication break-make.Wherein, the isolating switch module formed with bidirectional triode thyristor is better than the isolating switch module be made up of relay, and reason is as follows:
1, bidirectional triode thyristor is under the condition that loop current is very little, adopts the zero passage detection of bidirectional triode thyristor, triggers bidirectional triode thyristor conducting or shutoff.The minimum starting current adopting the circuit of relay then to need will be more much bigger than controllable silicon.Pass through the minimum load of electric current for some, relay can not pin completely, causes switch cisco unity malfunction, then there is not above situation based on thyristor controlled single live wire non-contact infrared inductive switch.
2, bidirectional triode thyristor is compared with relay, and the silicon controlled life-span is long, extends the useful life of single live wire switch.
Refer to Fig. 1, described switch control module 16 comprises metal-oxide-semiconductor Q1, the 3rd resistance R3 and the 4th resistance R4, the source ground of described metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 connects the 4th end of opto-coupler chip U2 by the 3rd resistance R3, the grid of described metal-oxide-semiconductor Q1 connects the output of MCU chip by the 4th resistance R4.In the present embodiment, described metal-oxide-semiconductor Q1 is NMOS tube, and when the grid of metal-oxide-semiconductor Q1 is high level, metal-oxide-semiconductor Q1 conducting makes the 3rd end and the 4th end conducting of opto-coupler chip U2; When the grid of metal-oxide-semiconductor Q1 is low level, metal-oxide-semiconductor Q1 cut-off makes the 3rd end of opto-coupler chip U2 and the 4th end disconnect.In other embodiments, this NMOS tube can also replace by NPN triode, PNP triode or PMOS, only need according to the low and high level state of MCU chip output signal, and select corresponding switching device, the utility model is not restricted this.
Please continue to refer to Fig. 1, described AC-DC conversion module 14 comprises AC-DC conversion chip U4, the second electric capacity C2, the 3rd electric capacity C3, the 5th resistance R5, the 5th diode D5 and the 6th diode D6, described first terminals TP1 also connects the positive pole of the 5th diode D5, the negative pole of described 5th diode D5 connects IN_AC end (i.e. ac input end) of described AC-DC conversion chip U4 by the 5th resistance R5, the IN_AC end of described AC-DC conversion chip U4 is also by the second electric capacity C2 ground connection, earth terminal (GND) ground connection of described AC-DC conversion chip U4, OUT_DC end (i.e. DC output end) of described AC-DC conversion chip U4 is by the 3rd electric capacity C3 ground connection, also connect the positive pole of the 6th diode D6, the negative pole of described 6th diode D6 connects the input of voltage reduction module 15, 2nd end of rectifier bridge 13 and the 3rd end of opto-coupler chip U1, described 3rd electric capacity C3 is polar capacitor, and positive pole connects the positive pole of the 6th diode and the OUT_DC end of AC-DC conversion chip U4, minus earth.Described AC-DC conversion chip U4 is used for that 220V or 110V alternating current is converted to 6V direct current and exports to voltage reduction module 15 step-down through the 6th diode D6.
In other embodiments of the utility model, the AC-DC conversion chip U4 that described AC-DC conversion module 14 adopts is used for the direct current of the 220V AC conversion 12V of IN_AC end input to export from OUT_DC end.
Please continue to refer to Fig. 1, single live wire switching circuit of the present invention also comprises isolation module 17, one end of described isolation module 17 connects the 2nd end of the output of AC-DC conversion module 14, the input of voltage reduction module 15, the 3rd end of opto-coupler chip U2 and rectifier bridge 13, the other end ground connection of described isolation module 17.Described isolation module 17 comprises the 4th electric capacity C4, and one end of described 4th electric capacity C4 connects the input of the negative pole of the 6th diode D6, the 2nd end of rectifier bridge 13, the 3rd end of opto-coupler chip U2 and voltage reduction module 15, the other end ground connection of described 4th electric capacity C4; Described 4th electric capacity C4 is polar capacitor, minus earth.
Described voltage reduction module 15 comprises step-down chip U5, the 7th diode D7 and the 5th electric capacity C5, Vin end (i.e. input) of described step-down chip U5 connects the negative pole of the 6th diode D6 negative pole and the 7th diode D7, the plus earth of the 7th diode D7, Vout end (i.e. output) of described step-down chip U5 connects the input of MCU chip, also by the 5th electric capacity C5 ground connection.Described 5th electric capacity C5 is polar capacitor, and positive pole connects the Vout end of step-down chip U5 and the input of MCU chip, minus earth; Described step-down chip U5 is LDO(low dropout regulator, low pressure difference linear voltage regulator) chip, the 6V direct current for AC-DC conversion module 14 being exported is down to 3V and is powered to MCU chip.
In other embodiments of the utility model, the 12V direct current that the step-down chip U5 that described voltage reduction module 15 adopts is used for AC-DC conversion module 14 being exported is down to 3V and is powered to MCU chip.
Please continue to refer to Fig. 1, described ON state electricity-fetching module 12 comprises: the second controllable silicon U3, first voltage stabilizing didoe D8, second voltage stabilizing didoe D9 and fuse F1, 1st end of described second controllable silicon U3 connects the 1st end of rectifier bridge 13, the other end of the second resistance R2 and the 2nd end of the first controllable silicon U1, 2nd end of the second controllable silicon U3 connects the 3rd end of rectifier bridge 13 and the negative pole of the first voltage stabilizing didoe D8, also connect described second terminals TP2 by fuse F1, the positive pole of described first voltage stabilizing didoe D8 connects the positive pole of the second voltage stabilizing didoe D9, the negative pole of the second voltage stabilizing didoe D9 connects the 3rd end of the second controllable silicon U3.
Please continue to refer to Fig. 1, in single live wire switching circuit that the utility model provides, also comprise for receiving wireless control signal that outside mobile terminal (not shown) sends and controlling according to the wireless control signal received the wireless module 18 that MCU chip exports low and high level signal; The output of described wireless module 18 connects the input of MCU chip, described wireless module 18 carries out wireless connections with mobile terminal, and according to the wireless control signal that mobile terminal sends, MCU chip is made to export low and high level signal, and then the open and close of control switch control module 16, finally realize the control to single live wire switching circuit break-make.Described wireless module 18 adopts WiFi or ZigBee(ZigBee protocol) communication module of technology also can be the one in bluetooth module, 433M wireless module and 315M wireless module.
Described mobile terminal comprises the wireless launcher corresponding with wireless module 18, for setting up wireless connections with wireless module 18 and launching wireless control signal.The wireless launcher of described mobile terminal adopts WiFi or ZigBee(ZigBee protocol) communication module of technology also can be the one in bluetooth module, 433M wireless module and 315M wireless module.Described mobile terminal comprises mobile phone, panel computer and intelligent watch etc.
In other embodiments of the utility model, described fuse F1 is arranged on the first terminals TP1, and namely the first terminals TP1 connects isolating switch module 11 and AC-DC conversion module 14 by fuse F1.
In order to improve security performance, single live wire switching circuit of the present utility model can coordinate the control realized light fixture with proximity transducer.When accessing proximity transducer, described proximity transducer passes through I
2c bus is connected with MCU chip, whether has object (as human body) close to this proximity transducer for induction.
Wherein, described proximity transducer adopts infrared proximity transducer, and it comprises an infrared light emitting diodes and an infrared light receiving sensor, and infrared light receiving sensor is connected with MCU chip.Send the invisible infrared light of 850nm after infrared light emitting diodes energising, infrared light receiving sensor then carries out with the frequency of every 10 milliseconds the invisible infrared light that detection of reflected returns always.
The operation principle of infrared proximity transducer is: when blocking (the maximum receiving range of infrared proximity transducer setting is herein 8CM) when there is object in the front of infrared optical receiving sensor, the invisible infrared light that infrared light emitting diodes is launched is reflected by the object, thus received by infrared light receiving sensor, the infrared light received is changed into binary code by infrared light receiving sensor, and passes through I
2c bus passes to MCU chip.In the present embodiment, infrared proximity transducer and MCU chip pass through I
2c bus connects communication, achieves signal stabilization between infrared proximity transducer and MCU chip and transmits efficiently.Certainly, in other embodiments, the serial ports such as SPI, UART or parallel port can also be adopted between infrared proximity transducer with MCU chip to communicate.
Infrared proximity transducer is coordinated to be described in detail below in conjunction with Fig. 1 and Fig. 3 to single live wire switching circuit of the present utility model:
Infrared proximity transducer and MCU chip are single live wire switching circuit exterior electrical components.When having object when the working range of infrared proximity transducer, infrared proximity transducer will receive the infrared light of being returned by this reflections off objects, and the infrared light intensity-conversion received is become corresponding binary code, passes through I
2c bus communicates with MCU chip, MCU chip compares this binary code with set point, when binary code is greater than set point, MCU chip exports high level (contrary with initial low level), make metal-oxide-semiconductor Q1 conducting, thus make opto-coupler chip U2 conducting, and then make the first controllable silicon U1 conducting, now, second controllable silicon U3 is at two voltage stabilizing didoe D8, also conducting when D9 provides voltage, the electric current exported from the second terminals TP2 flows out from the first terminals TP1 through fuse F1, the second controllable silicon U3, the first controllable silicon U1 successively, powering load.
When having object again when the working range of infrared proximity transducer, the level exported is changed (being transformed into low level by high level) by MCU chip, metal-oxide-semiconductor Q1 is ended, thus the 1st end of opto-coupler chip U2 and the 2nd end are disconnected, realize the disconnection of the first controllable silicon U1, make load power down, achieve and without the need to contacting mains switch body, light fixture is controlled, avoid electric shock, greatly improve security performance.
When the 1st end and the disconnection of the 2nd end of opto-coupler chip U2, from first terminals TP1 input 220V or 110V alternating voltage through AC-DC conversion module 14 change after, export 6V direct current to voltage reduction module 15, by voltage reduction module 15,6V direct current is dropped to 3V to power to MCU chip, now MCU chip is in holding state, emission current also drops to minimum by proximity transducer, infrared light receiving sensor is also in semidormancy state, current drain is also very little, large about 50 microamperes, and be now probably 30 microamperes by the electric current of live wire, and the starting current of LED is at 40-50 microampere, so the problem that LED there will not be flicker in standby can be met.And the minimum starting current of electricity-saving lamp is more than 100 microamperes, the minimum starting current of incandescent lamp, more than 50 milliamperes, can meet the demands completely, the long service life of light fixture.When standby, from the electric current that the first terminals TP1 inputs, through AC-DC conversion chip U4, export to rectifier bridge 13 from the OUT_DC end of AC-DC conversion chip U4, then export from the second terminals TP2 through fuse F1.
By above-mentioned single live wire switching circuit and above-mentioned infrared proximity transducer with the use of, the utility model also provides a kind of lamp control system, described lamp control system is made up of some groups of above-mentioned single live wire switching circuits and above-mentioned infrared proximity transducer, above-mentioned single live wire switching circuit and above-mentioned infrared proximity transducer one_to_one corresponding are arranged, namely a single live wire switching circuit and infrared proximity transducer with the use of, control the Kai Heguan of a light fixture, thus, described lamp control system not only can realize the security control to many group light fixtures, and the light fixture flicker free phenomenon controlled, long service life.
In sum, single live wire switching circuit that the utility model provides, when standby, by AC-DC conversion module, 220V or 110V alternating current is converted to 6V direct current, then the voltage obtaining 3V by the further step-down of voltage reduction module is powered to MCU chip, make circuit and standby time the electric current that need consume little, be less than the starting current of LED, and the minimum starting current of electricity-saving lamp and incandescent lamp is higher than the starting current of LED, thus the phenomenon that there will not be light fixture to glimmer, the long service life of light fixture.
Be understandable that; for those of ordinary skills; can be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the utility model.
Claims (10)
1. a single live wire switching circuit, is characterized in that, comprising:
For connecting the first terminals and second terminals of single live wire;
For maintaining the ON state electricity-fetching module of the power supply of single live wire switching circuit when single live wire switch conduction;
Isolating switch module;
The rectifier bridge be made up of the first diode, the second diode, the 3rd diode and the 4th diode;
For alternating current is converted to galvanic AC-DC conversion module;
Voltage for exporting AC-DC conversion module carries out the voltage reduction module that step-down process is powered to MCU chip;
For controlling the switch control module of the conducting of isolating switch module and disconnection;
Described first terminals are connected the input of MCU chip successively with voltage reduction module by AC-DC conversion module, also be connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge with the 2nd end by the 1st end of isolating switch module, the output of described MCU chip connects the 4th end of isolating switch module by switch control module, 3rd end of described isolating switch module connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, 3rd end of described rectifier bridge connects the 2nd end of ON state electricity-fetching module, 3rd end of described ON state electricity-fetching module connects described second terminals.
2. single live wire switching circuit according to claim 1, it is characterized in that, described isolating switch module comprises controllable silicon unit and isolated location, 3rd end of described controllable silicon unit is connected the 2nd end and the 1st end of described isolated location with the 4th end correspondence, described first terminals are connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge by the 1st end of controllable silicon unit with the 2nd end, 3rd end of described isolated location connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, 4th end connecting valve control module of described isolated location.
3. single live wire switching circuit according to claim 2, is characterized in that, described controllable silicon unit comprises the first controllable silicon, the first resistance, the second resistance and the first electric capacity; Described first terminals are connected described first silicon controlled the 1st end, are also connected the 1st end of the first silicon controlled the 3rd end and isolated location by the first resistance, be also connected the 1st end of the first silicon controlled the 3rd end and the first isolated location by the first electric capacity, and described first silicon controlled the 2nd end is connected the 1st end of the 1st end of ON state electricity-fetching module and rectifier bridge, is also connected the 2nd end of isolated location by the second resistance.
4. single live wire switching circuit according to claim 3, it is characterized in that, described isolated location comprises opto-coupler chip, 1st end of described opto-coupler chip connects the first silicon controlled the 3rd end, 2nd end of described opto-coupler chip connects one end of the second resistance, 3rd end of described opto-coupler chip connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described opto-coupler chip.
5. single live wire switching circuit according to claim 1, it is characterized in that, described isolating switch module comprises relay, described first terminals are connected the 1st end of ON state electricity-fetching module and the 1st end of rectifier bridge by the 1st end of relay with the 2nd end, 3rd end of described relay connects the 2nd end of rectifier bridge, the output of AC-DC conversion module and the input of voltage reduction module, the 4th end connecting valve control module of described relay.
6. single live wire switching circuit according to claim 4, it is characterized in that, described switch control module comprises metal-oxide-semiconductor, the 3rd resistance and the 4th resistance, the source ground of described metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor connects the 4th end of opto-coupler chip by the 3rd resistance, the grid of described metal-oxide-semiconductor connects the output of MCU chip by the 4th resistance.
7. single live wire switching circuit according to claim 6, is characterized in that, described AC-DC conversion module comprises AC-DC conversion chip, the second electric capacity, the 3rd electric capacity, the 5th resistance, the 5th diode and the 6th diode; Described first terminals also connect the positive pole of the 5th diode, the negative pole of described 5th diode connects the input of described AC-DC conversion chip by the 5th resistance, the input of described AC-DC conversion chip is also by the second capacity earth, the earth terminal ground connection of described AC-DC conversion chip, the output of described AC-DC conversion chip is by the 3rd capacity earth, also connect the positive pole of the 6th diode, the negative pole of described 6th diode connects the 3rd end of the input of voltage reduction module, the 2nd end of rectifier bridge and opto-coupler chip.
8. single live wire switching circuit according to claim 7, it is characterized in that, described voltage reduction module comprises step-down chip, the 7th diode and the 5th electric capacity, the Vin of described step-down chip holds the negative pole of connection the 6th diode cathode and the 7th diode, the plus earth of the 7th diode, the Vout end of described step-down chip connects the input of MCU chip, also by the 5th capacity earth.
9. single live wire switching circuit according to claim 3, it is characterized in that, described ON state electricity-fetching module comprises: the second controllable silicon, first voltage stabilizing didoe, second voltage stabilizing didoe and fuse, described second silicon controlled the 1st end connects the 1st end of rectifier bridge, the other end of the second resistance and the first silicon controlled the 2nd end, second silicon controlled the 2nd end connects the 3rd end of rectifier bridge and the negative pole of the first voltage stabilizing didoe, also connect described second terminals by fuse, the positive pole of described first voltage stabilizing didoe connects the positive pole of the second voltage stabilizing didoe, the negative pole of the second voltage stabilizing didoe connects the second silicon controlled the 3rd end.
10. single live wire switching circuit according to claim 1, is characterized in that, also comprises for receiving wireless control signal that outside mobile terminal sends and making MCU chip export the wireless module of low and high level signal according to the wireless control signal received; The output of described wireless module connects the input of MCU chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420776006.3U CN204482072U (en) | 2014-12-11 | 2014-12-11 | A kind of single live wire switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420776006.3U CN204482072U (en) | 2014-12-11 | 2014-12-11 | A kind of single live wire switching circuit |
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| CN204482072U true CN204482072U (en) | 2015-07-15 |
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| CN201420776006.3U Expired - Fee Related CN204482072U (en) | 2014-12-11 | 2014-12-11 | A kind of single live wire switching circuit |
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| CN107656455A (en) * | 2017-09-28 | 2018-02-02 | 杭州古北电子科技有限公司 | A kind of implementation method and device of low-power consumption panel-switch |
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