CN108092402A - A kind of more power supply automatic switchover circuits - Google Patents
A kind of more power supply automatic switchover circuits Download PDFInfo
- Publication number
- CN108092402A CN108092402A CN201711437766.6A CN201711437766A CN108092402A CN 108092402 A CN108092402 A CN 108092402A CN 201711437766 A CN201711437766 A CN 201711437766A CN 108092402 A CN108092402 A CN 108092402A
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- resistance
- control circuit
- triode
- semiconductor
- oxide
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a kind of more power supply automatic switchover circuits, including microprocessor, interface, internal cell, first control circuit, second control circuit and the 3rd control circuit；First control circuit, second control circuit and the 3rd control circuit are connected with microprocessor, and first control circuit, second control circuit are connected with interface, and the 3rd control circuit is connected respectively with internal cell and first control circuit；Interface is also associated with external equipment, external equipment includes sensor module and backup battery, for the first control circuit for internal cell to be controlled to power to sensor module, second control circuit is used to control the input of backup battery, and the 3rd control circuit is used to be switched off or on the input of internal cell.The present invention can realize and backup battery and internal cell are switched over that, so as to extend the service life of equipment by way of increasing external backup power supply, circuit structure is simple, be suitble to the intellectual water meter application of power supply multi input.
Description
Technical field
The present invention relates to a kind of power supply handoff technique more particularly to a kind of more power supply automatic switchover circuits.
Background technology
At present, what intellectual water meter 2.0 developed is getting faster, since mechanical wear blocking of no tradition machinery water meter etc. is asked
Topic, service life is increasingly longer, and market application popularization rate is higher and higher.Due to the change of 2.0 gauging of products principle of intellectual water meter,
The power consumption needed is also constantly soaring, has requirements at the higher level to battery, but water meter case internal cell placement position has
Limit is usually to try to reduce system power dissipation, to reduce battery consumption, prolong the service life.
But there are following defects for existing power supply mode：
The power supply mode of mainstream at present, is still internal battery powers, but with intellectual water meter function it is continuous expand, it is logical
Letter mode requires raising etc. from wired to wireless (such as NB-IoT communication technologys), the communication frequency, and water meter power consumption can significantly improve,
Obviously it is not again most suitable by way of being continuously increased enclosure interior battery.This mode not only influences product beauty,
Above-mentioned problem can not be solved conscientiously.And with the expansion of function, intellectual water meter can increase other sensors, be not only
Flow sensor can also increase temperature sensor, pressure sensor, water quality sensor etc., these external sensors are generally also
Internal battery powers are needed, and are controlled, thus increase the control difficulty of the power supply of system.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of more power supply automatic switchover circuits,
Power supply is switched by circuit, increases external backup power supply and realizes the service life for extending equipment.
The purpose of the present invention adopts the following technical scheme that realization：
A kind of more power supply automatic switchover circuits, which is characterized in that including microprocessor, interface, internal cell, the first control
Circuit, second control circuit and the 3rd control circuit；First control circuit, second control circuit and the 3rd control circuit with it is micro-
Processor connects, and first control circuit, second control circuit be connected with interface, the 3rd control circuit respectively with internal cell and
First control circuit connects；Interface is also associated with external equipment, and external equipment includes sensor module and backup battery, and described the
For internal cell to be controlled to power to sensor module, second control circuit is used to control the defeated of backup battery one control circuit
Enter, the 3rd control circuit is used to be switched off or on the input of internal cell.
Further, the first control circuit includes diode D1, metal-oxide-semiconductor T1, triode Q1, resistance R1, resistance R2
With resistance R3, the source electrode of metal-oxide-semiconductor T1 and one end of resistance R1 are connected with the 3rd control circuit, and the grid of metal-oxide-semiconductor T1 passes through electricity
The collector of R2 connecting triodes Q1 is hindered, the collector of triode Q1 is also connected with the other end of resistance R1, the base stage of triode Q1
By resistance R3 connection microprocessors, the emitter of triode Q1 is grounded, the anode of the drain electrode connection diode D1 of metal-oxide-semiconductor T1,
The cathode connecting interface of diode D1.
Further, the second control circuit includes diode D2, metal-oxide-semiconductor T2, triode Q2, capacitance C1 and resistance R4
To resistance R7；The anode of the drain electrode connection diode D2 of metal-oxide-semiconductor T2, the cathode of diode D2 connect a direct current VCC, metal-oxide-semiconductor
The source electrode of T2, one end of resistance R4, one end of one end of resistance R7 and capacitance C1 are all connected with interface, another termination of capacitance C1
Ground, the grid of metal-oxide-semiconductor T2 are also connected with resistance R4's by the collector of resistance R5 connecting triodes Q2, the collector of triode Q2
The other end, the base stage of triode Q2 connect one end of resistance R6 and the other end of resistance R7, the other end connection of resistance R6 respectively
Microprocessor, the emitter ground connection of triode Q2, one end of resistance R7 is also connected with the 3rd control circuit.
Further, the 3rd control circuit includes diode D3, metal-oxide-semiconductor T3, triode Q3, capacitance C2, capacitance C3
With resistance R8 to resistance R11；The anode of the drain electrode connection diode D3 of metal-oxide-semiconductor T3, the cathode of diode D3 and the one of capacitance C2
End is all connected with direct current VCC, the other end ground connection of capacitance C2, the hair that the grid of metal-oxide-semiconductor T3 passes through resistance R8 connecting triodes Q3
Emitter-base bandgap grading, the emitter of triode Q3 be also connected with one end of resistance R9, the source electrode of metal-oxide-semiconductor T3, the other end of resistance R9, capacitance C3
One end is connected with the anode of internal cell, and the other end of capacitance C3 and the cathode of internal cell are grounded；The base of triode Q3
Pole connects one end of resistance R10 and one end of resistance R11 respectively, and the other end of resistance R10 and the collector of triode Q3 connect
Ground, the other end connection microprocessor of resistance R11, the base stage of one end connecting triode Q3 of resistance R7, the other end of resistance R9
Connect the source electrode of metal-oxide-semiconductor T1.
Compared with prior art, the beneficial effects of the present invention are：
The present invention can realize and backup battery and internal cell are switched over, so as to by increasing external backup power supply
Mode extends the service life of equipment, and circuit structure is simple, is suitble to the intellectual water meter application of power supply multi input.
Description of the drawings
Fig. 1 is a kind of function structure chart of more power supply automatic switchover circuits of the present invention；
Fig. 2 is a kind of circuit structure diagram of more power supply automatic switchover circuits of the present invention.
Specific embodiment
In the following, with reference to attached drawing and specific embodiment, the present invention is described further, it is necessary to which explanation is, not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
As shown in Figure 1, the present invention provides a kind of more power supply automatic switchover circuits, including microprocessor, interface, internal electricity
Pond, first control circuit, second control circuit and the 3rd control circuit；First control circuit, second control circuit and the 3rd control
Circuit processed is connected with microprocessor, and first control circuit, second control circuit are connected with interface, the 3rd control circuit difference
It is connected with internal cell and first control circuit；Interface is also associated with external equipment, and external equipment includes sensor module and standby
Part power supply, for internal cell to be controlled to power to sensor module, second control circuit is used to control the first control circuit
The input of backup battery, the 3rd control circuit are used to be switched off or on the input of internal cell.
The present invention can as needed be powered sensor module；It supports the hot plug of power supply, facilitates the electricity at scene
It replaces in source.When internal cell access and interface without external power supply when, power supply is provided by internal cell；When interface accesses backup battery
When, backup battery offer is be provided；When internal cell accesses and interface has external power supply, internal cell does not supply for system
Electricity；When detecting that external power supply is relatively low, externally fed is automatically cut off, is switched to internal battery powers；Microprocessor can also
As needed, the power supply of different electrical power is automatically controlled；Can power needs according to other sensors, and internal cell is sensed for other
Device is powered.
The function of wherein microcontroller is the brain of system, realizes the control, calculating and operation of system；The function of interface is
It is connected with external equipment, such as sensor module and backup battery；First control circuit is that the power supply of other sensors is controlled to supply
It gives；Second control circuit is to control the input of backup battery and the 3rd control circuit is controlled；3rd control circuit is
Internal cell is controlled, realizes the automatic switchover of power supply.
Specifically, referring to Fig. 2, first control circuit includes diode D1, metal-oxide-semiconductor T1, triode Q1, resistance R1, resistance
The source electrode of R2 and resistance R3, metal-oxide-semiconductor T1 and one end of resistance R1 are connected with the 3rd control circuit, and the grid of metal-oxide-semiconductor T1 passes through
The collector of resistance R2 connecting triodes Q1, the collector of triode Q1 are also connected with the other end of resistance R1, the base of triode Q1
Pole is grounded by the emitter of resistance R3 connections microprocessor U1, triode Q1, and the drain electrode connection diode D1 of metal-oxide-semiconductor T1 is just
Pole, the cathode connecting interface J1 of diode D1.Second control circuit includes diode D2, metal-oxide-semiconductor T2, triode Q2, capacitance C1
With resistance R4 to resistance R7；The anode of the drain electrode connection diode D2 of metal-oxide-semiconductor T2, the cathode of diode D2 connect a direct current
VCC, the source electrode of metal-oxide-semiconductor T2, one end of resistance R4, one end of one end of resistance R7 and capacitance C1 are all connected with interface J1, capacitance C1
Other end ground connection, the grid of metal-oxide-semiconductor T2 also connected by the collector of resistance R5 connecting triodes Q2, the collector of triode Q2
The other end of connecting resistance R4, the base stage of triode Q2 connect one end of resistance R6 and the other end of resistance R7 respectively, resistance R6's
The other end connects microprocessor U1, and the emitter ground connection of triode Q2, one end of resistance R7 is also connected with the 3rd control circuit.3rd
Control circuit includes diode D3, metal-oxide-semiconductor T3, triode Q3, capacitance C2, capacitance C3 and resistance R8 to resistance R11；Metal-oxide-semiconductor T3
Drain electrode connection diode D3 anode, the cathode of diode D3 and one end of capacitance C2 be all connected with direct current VCC, capacitance C2's
The other end is grounded, and the grid of metal-oxide-semiconductor T3 is also connected with by the emitter of resistance R8 connecting triodes Q3, the emitter of triode Q3
One end of resistance R9, the source electrode of metal-oxide-semiconductor T3, the other end of resistance R9, one end of capacitance C3 are connected with the anode of internal cell,
The other end of capacitance C3 and the cathode of internal cell are grounded；The base stage of triode Q3 connects one end and the electricity of resistance R10 respectively
One end of R11 is hindered, the other end of resistance R10 and the collector of triode Q3 are grounded, the other end connection microprocessor of resistance R11
The base stage of one end connecting triode Q3 of device U1, resistance R7, the source electrode of the other end connection metal-oxide-semiconductor T1 of resistance R9.
The operation principle of the present invention is, when internal cell access and interface J1 are without external power supply, resistance R10 is by triode
The base stage of Q3 drags down, and triode Q3 conductings, resistance R8 is dragged down, then metal-oxide-semiconductor T3 is turned on, and internal cell is powered for VCC, diode
D3 plays the role of reverse protection；During the state, interface J1 access backup batteries, resistance R7 is drawn high, triode Q2 conductings, resistance R5
It dragging down, metal-oxide-semiconductor T2 conductings, triode Q3 ends while resistance R7 is drawn high, and resistance R8, resistance R9 are drawn high, metal-oxide-semiconductor T3 cut-offs,
Internal cell is not externally fed, thus at this point, internal cell is plugged, system still works normally；During the state, it will back up
Power supply from interface J1 extract when, resistance R7 and triode Q3 are pulled low, triode Q3 conductings and triode Q2 ends, and then MOS
Pipe T3 is turned on and metal-oxide-semiconductor T2 ends, and the hot plug of backup battery is realized in internal cell output power supply.When other sensors are connected on
When interface needs power supply, powered automatically by backup battery if interface has connect backup battery；When backup battery does not access
When, then microprocessor can be drawn high resistance R3 by P1, and triode Q1 conductings, resistance R8, resistance R9 are dragged down, and metal-oxide-semiconductor T1 is led
It is logical, by internal battery powers to other sensors.P2 the and P3 interfaces of microprocessor U1 can both be used as delivery outlet, can also
As input interface；When as output interface, for forcing the switching of Switching power, such as when backup battery voltage is relatively low,
Microprocessor can switch power to internal battery powers；During as input interface, it can be used for current power state detection,
And current power voltage is monitored.
The above embodiment is only the preferred embodiment of the present invention, it is impossible to the scope of protection of the invention is limited with this,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed scope.
Claims (4)
1. a kind of more power supply automatic switchover circuits, which is characterized in that including microprocessor, interface, internal cell, the first control electricity
Road, second control circuit and the 3rd control circuit；First control circuit, second control circuit and the 3rd control circuit with micro- place
Manage device connection, first control circuit, second control circuit be connected with interface, the 3rd control circuit respectively with internal cell and the
One control circuit connects；Interface is also associated with external equipment, and external equipment includes sensor module and backup battery, and described first
For control circuit for internal cell to be controlled to power to sensor module, second control circuit is used to control the input of backup battery,
3rd control circuit is used to be switched off or on the input of internal cell.
2. more power supply automatic switchover circuits as described in claim 1, which is characterized in that the first control circuit includes two poles
Pipe D1, metal-oxide-semiconductor T1, triode Q1, resistance R1, resistance R2 and resistance R3, the source electrode of metal-oxide-semiconductor T1 and one end of resistance R1 are with
Three control circuits connect, and the grid of metal-oxide-semiconductor T1 is by the collector of resistance R2 connecting triodes Q1, and the collector of triode Q1 is also
The other end of resistance R1 is connected, by resistance R3 connection microprocessors, the emitter of triode Q1 is grounded the base stage of triode Q1,
The anode of the drain electrode connection diode D1 of metal-oxide-semiconductor T1, the cathode connecting interface of diode D1.
3. more power supply automatic switchover circuits as claimed in claim 2, which is characterized in that the second control circuit includes two poles
Pipe D2, metal-oxide-semiconductor T2, triode Q2, capacitance C1 and resistance R4 are to resistance R7；The anode of the drain electrode connection diode D2 of metal-oxide-semiconductor T2,
Cathode the connection one direct current VCC, the source electrode of metal-oxide-semiconductor T2, one end of resistance R4, one end of resistance R7 and capacitance C1 of diode D2
One end be all connected with interface, the other end ground connection of capacitance C1, the current collection that the grid of metal-oxide-semiconductor T2 passes through resistance R5 connecting triodes Q2
Pole, the collector of triode Q2 are also connected with the other end of resistance R4, the base stage of triode Q2 connect respectively resistance R6 one end and
The other end of resistance R7, the other end connection microprocessor of resistance R6, the emitter ground connection of triode Q2, one end of resistance R7 is also
Connect the 3rd control circuit.
4. more power supply automatic switchover circuits as claimed in claim 3, which is characterized in that the 3rd control circuit includes two poles
Pipe D3, metal-oxide-semiconductor T3, triode Q3, capacitance C2, capacitance C3 and resistance R8 are to resistance R11；The drain electrode connection diode of metal-oxide-semiconductor T3
The anode of D3, the cathode of diode D3 and one end of capacitance C2 are all connected with direct current VCC, the other end ground connection of capacitance C2, metal-oxide-semiconductor
The grid of T3 is also connected with one end of resistance R9, MOS by the emitter of resistance R8 connecting triodes Q3, the emitter of triode Q3
The source electrode of pipe T3, the other end of resistance R9, one end of capacitance C3 are connected with the anode of internal cell, the other end of capacitance C3 and
The cathode of internal cell is grounded；The base stage of triode Q3 connects one end of resistance R10 and one end of resistance R11, resistance respectively
The other end of R10 and the collector of triode Q3 are grounded, the other end connection microprocessor of resistance R11, one end of resistance R7
The base stage of connecting triode Q3, the source electrode of the other end connection metal-oxide-semiconductor T1 of resistance R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711437766.6A CN108092402A (en) | 2017-12-26 | 2017-12-26 | A kind of more power supply automatic switchover circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711437766.6A CN108092402A (en) | 2017-12-26 | 2017-12-26 | A kind of more power supply automatic switchover circuits |
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| Publication Number | Publication Date |
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| CN108092402A true CN108092402A (en) | 2018-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711437766.6A Pending CN108092402A (en) | 2017-12-26 | 2017-12-26 | A kind of more power supply automatic switchover circuits |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831038A (en) * | 2018-06-25 | 2018-11-16 | 临沂金海仪表制造有限公司 | A kind of prepayment intelligent water meter system |
| CN108879892A (en) * | 2018-09-20 | 2018-11-23 | 山东思科赛德矿业安全工程有限公司 | A kind of double cell group automatic switchover power supply system |
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| US20120292988A1 (en) * | 2011-05-17 | 2012-11-22 | Mitsubishi Electric Corporation | On-vehicle electronic control apparatus |
| CN203522318U (en) * | 2013-10-22 | 2014-04-02 | Tcl通力电子（惠州）有限公司 | Three-power-supply switching circuit and consumer electronic equipment |
| CN105119365A (en) * | 2015-08-18 | 2015-12-02 | 深圳市安瑞科科技有限公司 | Dual-channel DC power supply automatic switching device |
| CN204886403U (en) * | 2015-08-19 | 2015-12-16 | 深圳市天昊科技有限公司 | External power and backup battery's seamless handover circuit |
| CN106356988A (en) * | 2016-10-09 | 2017-01-25 | 珠海市杰理科技有限公司 | Power switching and controlling circuit |
| CN206293968U (en) * | 2016-12-22 | 2017-06-30 | 天津力神特种电源科技股份公司 | The automatic switch-over circuit that battery is powered with externally fed |
| CN207652129U (en) * | 2017-12-26 | 2018-07-24 | 宁波水表股份有限公司 | A kind of more power supply automatic switchover circuits |
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2017
- 2017-12-26 CN CN201711437766.6A patent/CN108092402A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120292988A1 (en) * | 2011-05-17 | 2012-11-22 | Mitsubishi Electric Corporation | On-vehicle electronic control apparatus |
| CN203522318U (en) * | 2013-10-22 | 2014-04-02 | Tcl通力电子（惠州）有限公司 | Three-power-supply switching circuit and consumer electronic equipment |
| CN105119365A (en) * | 2015-08-18 | 2015-12-02 | 深圳市安瑞科科技有限公司 | Dual-channel DC power supply automatic switching device |
| CN204886403U (en) * | 2015-08-19 | 2015-12-16 | 深圳市天昊科技有限公司 | External power and backup battery's seamless handover circuit |
| CN106356988A (en) * | 2016-10-09 | 2017-01-25 | 珠海市杰理科技有限公司 | Power switching and controlling circuit |
| CN206293968U (en) * | 2016-12-22 | 2017-06-30 | 天津力神特种电源科技股份公司 | The automatic switch-over circuit that battery is powered with externally fed |
| CN207652129U (en) * | 2017-12-26 | 2018-07-24 | 宁波水表股份有限公司 | A kind of more power supply automatic switchover circuits |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108831038A (en) * | 2018-06-25 | 2018-11-16 | 临沂金海仪表制造有限公司 | A kind of prepayment intelligent water meter system |
| CN108879892A (en) * | 2018-09-20 | 2018-11-23 | 山东思科赛德矿业安全工程有限公司 | A kind of double cell group automatic switchover power supply system |
| CN108879892B (en) * | 2018-09-20 | 2024-04-19 | 山东思科赛德矿业安全工程有限公司 | Automatic switching power supply system for double battery packs |
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