CN110071574A - Electronic access control system based on uninterruptible power supply - Google Patents
Electronic access control system based on uninterruptible power supply Download PDFInfo
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- CN110071574A CN110071574A CN201910388197.3A CN201910388197A CN110071574A CN 110071574 A CN110071574 A CN 110071574A CN 201910388197 A CN201910388197 A CN 201910388197A CN 110071574 A CN110071574 A CN 110071574A
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
-
- 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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00634—Power supply for the lock
- G07C2009/00642—Power supply for the lock by battery
-
- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of electronic access control system based on uninterruptible power supply, the supply voltage of electronic access control system is provided by uninterruptible power supply, and uninterruptible power supply includes farad capacitor module, outage detection module, battery module and power supply switching module.In entire power down handoff procedure, supply voltage is provided by the first voltage that farad capacitor module exports, so that supply voltage not will receive the influence of handoff response delay, realizes seamless switching.In this way, power down failure phenomenon will not occur for electronic access control system whole process, while also reducing the energy consumption in course of normal operation.
Description
Technical field
The present invention relates to electronic technology field, in particular to a kind of electronic access based on uninterruptible power supply and its
Control method.
Background technique
Electronic access compares mechanical door lock, can more adapt to flow of personnel amount compared with the access control demand under overall situation,
In school, the occasions such as enterprise and hotel have extensive demand.To the dependable with function of electronic access query mainly from
In when power-off suddenly occurs, electronic access is often possible to that various Problem of Failure occur.Electronic access based on uninterruptible power supply
It is a main thought for solving the current outage problem of electronic access.
Uninterruptible power supply (UPS) is widely used in various power supply systems, unexpected at runtime to avoid circuit system
Power-off and the round-the-clock normal work of holding circuit system.Currently, general direct current ups power is broadly divided into online and standby
Formula.
Direct current on line type UPS power supply is located between load and power supply, as the direct power supply of load, mostly uses AC-DC-DC
Transformation.However, number of transitions is more for Switching Power Supply, energy loss is bigger, although can gapless switching, exist
Certain energy loss.
For off-line UPS power supply, simply by monitoring to have a power failure, electric power storage tank discharge is then triggered, so this
There are certain delays in switching for backup type direct current ups power.During delay, the input voltage in load is zero, still
Electronic access may be made to generate Problem of Failure.
Summary of the invention
The purpose of the present invention is to provide a kind of electronic access control systems based on uninterruptible power supply, comprising: gate inhibition's identification connects
Mouthful, according to external input, generate gate inhibition's identification signal；Access controller receives gate inhibition's identification signal, according to described
Gate inhibition's identification signal generates access control signal, prompts whether open gate inhibition；Gate inhibition acts device, is believed according to the access control
Number, Lai Kaiguan gate inhibition；Wherein, the supply voltage of the electronic access control system is provided by uninterruptible power supply, the uninterruptible power supply
Including farad capacitor module, outage detection module, battery module and power supply switching module, the uninterruptible power supply receives one
From external DC voltage, in which: the farad capacitor module has an input terminal, and receiving the DC voltage is the method
The farad capacitor charging in capacitance module is drawn, and according to the DC voltage, by the farad capacitor in the farad capacitor mould
The output end of block exports first voltage；The outage detection module receives the DC voltage by a test side, according to described
The situation of change of DC voltage, outside a signal output end one outage detection signal of output, the outage detection signal prompt
Whether portion's power supply powers off；The battery module has input terminal and output end, the output end output one of the battery module
A cell voltage；The power supply switching module has first input end, the second input terminal, third input terminal and a voltage output
End receives the first voltage wherein the first input end is connected to the farad capacitor module, and second input terminal connects
It is connected to the output end of the battery module, receives the cell voltage, the third input terminal is connected to the outage detection
The signal output end of module, receives the outage detection signal, and the voltage output end is described according to the first voltage
Cell voltage and the outage detection signal export the supply voltage, and supply load, the supply voltage is further by described
The input terminal of battery module receives.
The beneficial effect of the embodiment of the present invention includes: to be exported in entire power down handoff procedure by farad capacitor module
First voltage provides supply voltage, so that supply voltage not will receive the influence of handoff response delay, realizes seamless switching.This
Power down failure phenomenon will not occur for sample, electronic access control system whole process, while also reduce the energy consumption in course of normal operation.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the system framework schematic diagram of the uninterruptible power system 100 of one embodiment according to the present invention；
Fig. 2 shows the circuit diagrams of farad capacitor module 102 according to an embodiment of the invention；
Fig. 3 shows the electrical block diagram of outage detection module 103 according to an embodiment of the invention；
Fig. 4 shows the electrical block diagram of the battery module 104 according to an embodiment of the present invention；
Fig. 5 A shows the electrical block diagram of power supply switching module 105 according to an embodiment of the invention；
Fig. 5 B shows the electrical block diagram of power supply switching module 105 according to another embodiment of the present invention.
Fig. 6 shows the circuit diagram of the AC-DC module 101 of one embodiment of the invention；
Fig. 7 shows the electronic access control system 700 based on uninterruptible power supply of one embodiment according to the present invention；
Fig. 8 shows the schematic diagram of the access controller 702 of one embodiment according to the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " coupling ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Fig. 1 shows the system framework schematic diagram of the uninterruptible power system 100 of one embodiment according to the present invention.Such as figure
Shown in 1, uninterruptible power system 100 receives the DC voltage VDC, AC-DC from an AC-DC (AC-DC) power supply 101
Power supply 101 has an ac input end 1011, and ac input end 1011 receives alternating voltage VAC.In the illustrated embodiment, it hands over
It is line voltage 220V that galvanic electricity, which presses VAC, and in other embodiments, alternating voltage VAC can also select other according to application scenarios
Ac voltage.AC-DC power supply 101 also has a direct current output 1012, exports DC voltage VDC.In the illustrated embodiment
VDC is 15V.
Specifically, uninterruptible power system 100 includes: farad capacitor module 102, outage detection module 103, battery
Module 104 and power supply switching module 105.
Farad capacitor module 102 has an input terminal 1021, and receiving DC voltage VDC is in farad capacitor module 102
Farad capacitor charging export first voltage in output end 1022 by internal farad capacitor and according to DC voltage VDC
VCC1。
Outage detection module 103 is connected to AC-DC power supply 101 by test side 1031, receives the DC voltage of output
VDC exports an outage detection signal Voff in signal output end 1032, external power supply is prompted to be according to the situation of change of VDC
No power-off.
Battery module 104 has input terminal 1041 and output end 1042, and output end 1042 exports a cell voltage
VBAT。
Power supply switching module 105 includes that three input terminals and a voltage output end, first input end 1051 are connected to method
Capacitance module 102 is drawn, first voltage VCC1 is received, the second input terminal 1052 is connected to the output end of battery module 104, receives
Cell voltage VBAT, third input terminal 1053 are connected to the signal output end 1032 of outage detection module 103, receive outage detection
Signal Voff.Voltage output end 1054 is according to first voltage VCC1, cell voltage VBAT and outage detection signal Voff, output electricity
Source voltage VCC, supply load.Supply voltage VCC is further received by the input terminal of battery module 104.
In one embodiment, first voltage VCC1, cell voltage VBAT and supply voltage VCC are equal.DC voltage VDC
Greater than first voltage VCC1, cell voltage VBAT and supply voltage VCC.
When alternating voltage VAC is normal, outage detection signal Voff prompts external power supply normal, at this point, power supply switches mould
Block 105 selects first voltage VCC1 as output supply voltage VCC.When outside powers off, alternating voltage VAC falls, and breaks
Power detection signal Voff prompts external power supply power-off, at this point, power supply switching module 105 selects cell voltage VBAT as power supply electricity
Press VCC.
The first voltage VCC1 of farad capacitor module output is provided by one group of farad capacitor array, farad capacitor array 202
Positive and negative anodes between voltage be first voltage VCC1.Farad capacitor array may include one or more farad capacitor compositions.
Fig. 2 shows the circuit diagrams of farad capacitor module 102 according to an embodiment of the invention.As shown in Fig. 2, farad capacitor
Module 102 includes: input resistance 201, farad capacitor array 202 and farad capacitor protective module 203.Wherein, input resistance 201
It is coupled between DC voltage VDC and the anode of farad capacitor array 202.Farad capacitor array 202 includes one or more methods
Draw capacitor, it is preferred that farad capacitor array 202 includes multiple farad capacitors being one another in series.Such as in the illustrated embodiment, method
Capacitor array 202 is drawn to be composed in series by 6 farad capacitors, single farad capacitor pressure resistance is 2.7V, capacitance 500F.In other realities
It applies in example, it can be according to the actual needs of first voltage VCC1 and the practical pressure voltage of single farad capacitor, to determine farad electricity
Hold the quantity of farad capacitor in array 202.The anode output first voltage VCC1 of farad capacitor array 202.Farad capacitor protection
Module 203 may include one or more protection circuits, method of each protection circuit with corresponding protection in farad capacitor array 202
Capacitor is drawn to be arranged in parallel, to prevent farad capacitor over-voltage or overshoot.For example, in the illustrated embodiment, farad capacitor module 102
Circuit is protected with 6 farad capacitors.Specifically, farad capacitor protection circuit can use Shenzhen must Weir Science and Technology Ltd.
The BW6101 type super capacitor charge protection chip of product.Each farad capacitor protection circuit has a first input end
PVIN, one second input terminal PGND, a leakage current output end PIOUT and an optional indication end PLED.First is defeated
Enter to hold higher one end of voltage of corresponding the protected farad capacitor of PVIN coupling, the second input terminal PGND is couple to this farad of electricity
Lower one end of the voltage of appearance, to sense the voltage at current shielded farad capacitor both ends.Leakage current output end IOUT
It is coupled by a bleeder resistor PR1 with the second input terminal PGND phase, when farad capacitor both end voltage is more than predetermined threshold, is let out
Discharge stream output end PIOUT is connected with first input end PVIN, and bleeder resistor PR1 forms aerial drainage circuit, makes shielded method
Two terminal shortcircuit aerial drainage of capacitor is drawn, voltage is avoided to continue to increase.Optionally, indication end PLED can by a light emitting diode,
It is coupled to the second input terminal PGND, to indicate the state of current farad capacitor.In another embodiment, leakage current input terminal
IOUT can also be directly coupled to systematically GND by bleeder resistor PR1, and indication end PLED can pass through a light emitting diode
It is coupled directly to systematically GND.
In one embodiment, farad capacitor module 102 further comprises the same input resistance of isolation diode 204
201 series connection.Wherein the anode of isolating diode 204 is coupled with DC voltage VDC, anode of the cathode with farad capacitor array 202
Mutually couple.Isolating diode 204 can be when DC voltage VDC falls and presses, first voltage that farad capacitor array 202 is exported
VCC1 keeps apart with DC voltage VDC, prevents first voltage VCC1 reverse compensating direct current voltage when external power supply disconnects
VDC influences the correctness of outage detection signal Voff.
Fig. 3 shows the electrical block diagram of outage detection module 103 according to an embodiment of the invention.Such as Fig. 3
Shown, outage detection module 103 includes feedback loop divider 301, comparator 302, reference voltage generator 303 and optional rear class
Signal generator 304.Wherein feedback loop divider 301 is a tandem type resitstance voltage divider, and the direct current for being coupled to AC-DC power supply is defeated
Between outlet 1012 and systematically GND, one feedback voltage V FB of partial pressure output.Reference voltage generator generates a benchmark electricity
Press VREF.In the illustrated embodiment, reference voltage generator is an adjustable resistance pressure-dividing network, is coupled in comparator power supply
Voltage (such as 12V) homologous ray between GND, including a fixed resistance REF1 and a rheostat REFV, rheostat REFV
Voltage adjusting end outputting reference voltage VREF.Comparator 302 has normal phase input end 3021, inverting input terminal 3022 and output end
3023, wherein normal phase input end 3021 receives reference voltage VREF, and inverting input terminal 3022 receives feedback voltage V FB, output end
Export comparison result signal VH.In illustrated embodiment, comparator 302 can use Texas Instrument (Texas Instruments)
The LM393 type low voltage comparator of company's production.In other embodiments, other types or model can be used in those skilled in the art
Comparator and carry out corresponding connection adaptation, repeats no more herein.Optionally, knot is compared in the reception of rear class signal generator 304
VH is optionally carried out conversion and forms digitized outage detection signal by fruit signal VH as outage detection signal Voff
TADC, for comparison result to be adapted to input rear class Digital Logical Circuits, such as microcontroller (MCU), digital signal processor
(DSP), programmable logic circuit (PLC) or field programmable gate array (FPGA) etc..In the illustrated embodiment, rear class signal
Generator 304 is a resitstance voltage divider, exports conversion signal TADC by partial pressure end, in other embodiments, rear class signal is raw
Growing up to be a useful person 304 can also realize analog-to-digital conversions using other common modulus signal conversion circuits in the prior art.
Fig. 4 shows the electrical block diagram of the battery module 104 according to an embodiment of the present invention.Such as Fig. 4
Shown, battery module 104 includes power input 1041, for receiving supply voltage VCC as battery module power supply.It stores
Battery module 104 further comprises: DC-DC (DC-DC) power module 1042, DC-DC control signal generator 1043,
DC-DC feedback sense circuit 1044 and battery 1045.Wherein, in the illustrated embodiment, DC DC power module 1042
It is opened for voltage-dropping type (Buck) synchronous rectification dc voltage changer, including master power switch (i.e. upper tube) HS and synchronous rectification
Close (i.e. down tube) LS and rear class LC filter.Master power switch HS has first end, second end and control terminal, wherein first
End coupling receives power supply power supply VCC, and control terminal is connected to DC-DC control signal generator 1043 for receiving upper tube control signal
HO.Synchronous rectification switch LS has first end, second end and control terminal, wherein first end is connected to the of master power switch HS
Two ends, output chopping signal SW to rear class LC filter, second end are connected to systematically GND, and control terminal is connected to DC-DC control
Signal generator 1043 controls signal LO for receiving a down tube.Preferably, master power switch HS and synchronous rectification switch LS
It is Metal-Oxide Semiconductor field-effect tube (MOSFET).Rear class LC filter may include a LC filter network, that is, export
Inductance Lout and output capacitance Cout receives chopping signal SW, exports charging voltage Vch, is couple to the anode of battery 1045,
It charges to battery 1045.The anode output cell voltage VBAT of battery 1045.DC-DC sensing circuit 1044 may include
Voltage sensing circuit 401 and current sensing circuit 402.Wherein, voltage sensing circuit 401 can be a resitstance voltage divider coupling
Between in charging voltage Vch and systematically, sensing generates charging voltage feedback signal VADC.In the illustrated embodiment, charging electricity
Pressure feedback signal VADC adapts to Digital Logical Circuits.Similar, current sensing circuit 402 includes a sensing resistance Rsense
It is coupled between anode of the charging voltage Vch with battery 1045, a sensing amplifier IAmp, there is first input end, the
Two input terminals and output end, wherein first input end and the second input terminal are connected respectively to the both ends for sensing resistance Rsense, defeated
Outlet exports a digitized current feedback signal IADC.In the illustrated embodiment, sensing amplifier IAmp can be based on adopting
With the LM358 type integrated operational amplifier produced by Texas Instruments, realized with periphery resistance composition amplifier.It should
Proportional amplifier structure is known to those skilled in the art, therefore details are not described herein again.In the illustrated embodiment, DC-DC is controlled
Signal generator 1043 includes a microcontroller, receives digitized outage detection signal TADC, digitized electricity respectively
Feedback signal UADC and digitized current feedback signal IADC is pressed, and according to three signal, generates digitized pulsewidth tune
Make (PWM) signal, input driving circuit DR.Wherein, after outage detection signal TADC prompts to power off, microcontroller will not
Output pwm signal is enabled again, to stop driving DC-DC power module 1042, so that battery 1045 is transferred to discharge mode.When disconnected
When power detection signal TADC prompt does not power off, microcontroller will be according to digitized voltage feedback signal UADC and digitlization
Current feedback signal IADC, to determine the duty ratio of digitized pwm control signal, to control DC-DC power module 1042
Correctly battery 1045 is charged or is kept voltage.The pwm signal received is converted by driving circuit DR respectively
It manages signal HO processed and down tube controls signal LO, realize the control to master power switch HS and synchronous rectification switch LS.It is illustrating
In embodiment, microcontroller can be realized using any chip that can be realized Digital Logic, such as Intel (Intel)
8051 Series MCU chips of company or the STM32 Series MCU chip of (ST) company, STMicw Electronics production.Input driving electricity
Road DR can be realized using the IR2104 type semibridge system driving chip of international rectifier (IR) company.In other embodiments,
Control signal can be generated using traditional analog DC-DC controller.For example, Xin Yuan System Co., Ltd can be used
(MPS) the MP2905 type DC-DC controller produced, Lai Shengcheng pwm control signal generate digital PWM letter by MCU to substitute
Number.
Those of ordinary skill in the art can understand, and above-described embodiment is only exemplary and not restrictive.At it
In his embodiment, DC-DC power module 1042, DC-DC power source control signal generator 1043 and DC-DC sensing circuit 1044 can
As the case may be, using the different topological structure of same above-described embodiment, control mode or to sense mode.For example, at certain
In a little embodiments, DC-DC power module can be opened up using booster converter (Boost) or inverse excitation type converter (Fly-back)
It flutters to realize, bandwidth modulation (PFM) signal different from PWM modulation can be generated in DC-DC power source signal generator 1043, or
Selection is realized using constant on-time (Constant On-time) control mode.The realization of above scheme belongs to this field
The scope that those of ordinary skill will appreciate that, therefore details are not described herein again.
Fig. 5 A shows the electrical block diagram of power supply switching module 105 according to an embodiment of the invention.Such as figure
Shown in 5A, power supply switching module 105 includes switching signal driving circuit 501, the first switching switch 502 and the second switching switch
503.In the illustrated embodiment, switching signal driving circuit 501 has switching signal input terminal IN and driving signal output end
SOUT.Specific switching signal driving circuit 501 can drive for the IR2117 type single channel of international rectifier (IR) company production
Dynamic circuit chip.Switching signal input terminal IN receives the outage detection signal Voff from outage detection module 103, driving letter
Number output end is according to outage detection signal Voff, output switching driving signal SDR.First switching switch 502 has first end, the
Two ends and control terminal, wherein first end coupling receives cell voltage VBAT, and control terminal receives switching driving signal SDR.Second drives
Dynamic switch 503 has first end, second end and control terminal, and wherein first end is couple to the second end of the first switching switch 502, and
Output supply voltage VCC, second end coupling receive first voltage VCC1, and control terminal receives switching driving signal SDR.Preferably,
First switching switch 502 is a N-type field-effect tube, and the second switching switch 503 is a p-type field-effect tube.
When alternating current source is normal, outage detection signal Voff is low level, and switching driving signal SDR makes the first switching
Switch 502 turns off, and the second switching switch 503 is connected, supply voltage VCC first voltage as provided by farad capacitor module 102
VCC1 power supply.Farad capacitor module 102 is linked into VDC, and lasting charging keeps the stabilization of first voltage VCC1.When in commercial power supply
When disconnected, in the output end of AC-DC module decline suddenly occurs for VDC, and outage detection signal Voff becomes in response to the decline of VDC
For high level.And during operating lag, farad capacitor module 102 can be protected still in a short time after losing VDC
Hold the temporary stabilization of VCC1.Hereafter, switching driving signal SDR responds outage detection signal Voff, so that the first switching switch 502
Conducting, the second switching switch 503 turns off, so that supply voltage VCC is provided by the voltage VBAT of battery 1045.At this point, power supply
Voltage VCC once more charges to farad capacitor module 102, so that the first voltage VCC1 of farad capacitor module returns primary voltage
Value.
Fig. 5 B shows the electrical block diagram of power supply switching module 105 according to another embodiment of the present invention.Such as figure
Shown in 5B, power supply switching module 105 includes relay 511 and control switch 512.Wherein, relay 511 is a double-throw type
Relay, control loop part with control switch 512 are coupled in series in supply voltage VCC and systematically between GND.Relay
First contact of one end of 511 output loop is connected to supply voltage VCC, the second contact of the other end and third contact difference
It is connected to first voltage VCC1 and cell voltage VBAT.Control switch 512 controls open and close by outage detection signal Voff.
When alternating current is normal, outage detection signal Voff disconnects control switch 512, the input circuit of relay 511
On coil no power so that the first contact on output loop is connected to the second contact, i.e. supply voltage VCC is by first voltage
VCC1 is provided.When alternating current power-off, outage detection signal Voff is closed control switch 512, the input circuit of relay 511
On coil be powered, adsorb the first contact of output loop so that the first contact with the second contact disconnect, and with third contact connect
It connects.In this way, supply voltage VCC switchs to be provided by cell voltage VBAT.
In embodiment shown in either Fig. 5 A or Fig. 5 B, in entire power down handoff procedure, by farad capacitor module
The first voltage VCC1 of output provides supply voltage VCC, so that supply voltage VCC not will receive the influence of handoff response delay,
Meanwhile when alternating current is normal, entire uninterruptible power supply is in off-line state, and access system circuit is not powered battery, fills
Circuit does not also enable, and extends the life of storage battery and improves the efficiency of system.
Fig. 6 shows the circuit diagram of the AC-DC module 101 of one embodiment of the invention.As shown in fig. 6, AC-DC mould
Block 101 includes transformer 601, rectifier bridge 602 and filter circuit 603.Wherein the primary side of transformer 601 is as ac input end
1011 are couple to electricity network, receive VAC.Secondary side is couple to two input terminals of rectifier bridge 602.In the illustrated embodiment, it rectifies
Bridge 602 is a full bridge rectifier bridge.In other embodiments, rectifier bridge 602 can also use Half bridge rectifier.Rectifier bridge 602
One output end is couple to the input terminal of filter circuit 603, and the other end is as systematically GND.In illustrated embodiment, filter circuit
603 by two polar capacitors and two polarity free capacitors be connected in parallel on input terminal and systematically between.The output end of filter circuit 603
As the output end 1012 of AC-DC module 101, VDC is exported.
It will be appreciated by those of ordinary skill in the art that AC-DC module 101 is not limited to the example above.In other embodiments
In, AC-DC module 101 can have any available topological structure, component units and control mode, and realize the output of VDC.
For example, in certain embodiments, AC-DC module 101 can have actively or passively formula power factor correction circuit (PFC), with
Increase power factor.In another example AC-DC module 101 can be an isolation type switching power supply, using normal shock, flyback or half-bridge
Topology, the output of Lai Shixian VDC.
Fig. 7 shows the electronic access control system 700 based on uninterruptible power supply of one embodiment according to the present invention.Such as Fig. 7
Shown, electronic access control system 700 includes: that gate inhibition identifies interface 701, and access controller 702 and gate inhibition act device 703.Wherein door
Prohibit identification interface 701 according to external input, generates gate inhibition's identification signal GS.Gate inhibition identify interface 701 can for it is any can
To carry out the device of access information input, for example, gate inhibition identifies that interface 701 is radio frequency identification (RFID) card reader, pass through
Passive radio frequency label is read, gate inhibition's identification signal GS is generated.Gate inhibition identifies that interface can also be a code keyboard input dress
It sets, is perhaps finger print input device or recognition of face, scanning means of iris recognition etc., the invention is not limited in this regard.
Access controller 702 receives gate inhibition's identification signal GS, according to gate inhibition identification signal GS, generates access control signal
GC prompts whether open gate inhibition.As shown in figure 8, access controller 702 can use a microcontroller.Preferably, micro-
Controller MCU can generate pwm signal, Yi Jizuo as DC-DC control signal generator 1043 as shown in Figure 4 simultaneously
For access controller 702.In the embodiment shown in fig. 8, Micro-processor MCV receives signal TADC, IADC and UADC simultaneously, comes
Pwm signal is generated, and receives gate inhibition's identification signal GS, Lai Shengcheng access control signal GC.
Gate inhibition acts device 703 according to access control signal GC, Lai Kaiguan gate inhibition.In the illustrated embodiment, gate inhibition acts device
703 be an electromagnet door lock, including relay 731, electromagnet 732, control switch 733 and current-limiting resistance 734.Wherein, after
Electric appliance 731 is a double-throw type relay, and control loop part is coupled in series in supply voltage VCC with control switch 733 and is
Between system ground GND.First contact of one end of the output loop of relay 731 is connected to one end of electromagnet 732, it is preferred that
The second contact and third contact of the other end are connected respectively to supply voltage VCC and systematically GND.In another embodiment,
It two contacts can also be floating.The other end of electromagnet 732 is connected to supply voltage VCC by current-limiting resistance 734.Control switch
733 control open and close by access control signal GC.Wherein, supply voltage VCC is by uninterruptible power supply described above
The output of system 100 provides.In this way, since uninterruptible power system can be in entire power down handoff procedure, by farad capacitor mould
The first voltage VCC1 of block output provides supply voltage VCC, so that supply voltage VCC not will receive the shadow of handoff response delay
It rings, realizes seamless switching, not will lead to the Problem of Failure of electronic access.Meanwhile when alternating current is normal, entire uninterruptible power supply
In off-line state, access system circuit is not powered battery, and charging circuit does not also enable, and extends the life of storage battery simultaneously
And improve the efficiency of electronic access control system.
After gate inhibition's identification signal GS inputs access controller 702, if access controller 702 thinks recognition failures,
Output access control signal GC disconnects control switch 733, and the first contact on the output loop of relay 731 is connected to the
Three contacts, i.e., by one end homologous ray of electromagnet 732 GND connection, the other end are connected to supply voltage by current-limiting resistance 734
VCC forms current path.There is electric current to flow through electromagnet 732 at this time, generate magnetic-adsorption gate inhibition, so that access control system maintains door
Prohibit and closes.And if access controller 702 is thought to identify successfully, it exports access control signal GC and control switch 733 is closed
It closes, the first contact on the output loop of relay 731 is connected to the second contact, i.e., equally connects one end of electromagnet 732
To supply voltage VCC (or floating), the other end is connected to supply voltage VCC by current-limiting resistance 734, at this time due to electromagnet
Potential difference (or without closed circuit) is not present in 732 both ends, can not establish current loop, no current flows through electromagnet 732, electromagnet
Adsorption magnetic force disappear so that access control system open.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electronic access control system based on uninterruptible power supply, comprising:
Gate inhibition identifies that interface generates gate inhibition's identification signal according to external input；
Access controller receives gate inhibition's identification signal, according to gate inhibition's identification signal, generates access control signal, mentions
Show whether open gate inhibition；
Gate inhibition acts device, according to the access control signal, Lai Kaiguan gate inhibition；
Wherein, the supply voltage of the electronic access control system is provided by uninterruptible power supply, and the uninterruptible power supply includes farad electricity
Molar block, outage detection module, battery module and power supply switching module, the uninterruptible power supply receive one from the straight of outside
Galvanic electricity pressure, in which:
The farad capacitor module has an input terminal, and receiving the DC voltage is the farad in the farad capacitor module
Capacitor charging, and according to the DC voltage, the output end by the farad capacitor in the farad capacitor module exports first
Voltage；
The outage detection module receives the DC voltage by a test side, according to the situation of change of the DC voltage,
An outage detection signal is exported in a signal output end, whether the outage detection signal prompt external power supply powers off；
The battery module has input terminal and output end, and the output end of the battery module exports a cell voltage；
The power supply switching module has first input end, the second input terminal, third input terminal and a voltage output end, wherein
The first input end is connected to the farad capacitor module, receives the first voltage, and second input terminal is connected to institute
The output end for stating battery module, receives the cell voltage, and the third input terminal is connected to the outage detection module
The signal output end receives the outage detection signal, and the voltage output end is according to the first voltage, the battery electricity
Pressure and the outage detection signal export the supply voltage, and supply load, the supply voltage is further by the battery
The input terminal of module receives.
2. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein mentioned in the outage detection signal
When showing that the DC voltage from outside is normal, the power supply switching module selects the first voltage as the power supply electricity
Pressure, when the outage detection signal prompt falls to press from the external DC voltage, the power supply switching module selects institute
Battery voltage is stated as the supply voltage.
3. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein the first voltage, the storage
Cell voltage and the supply voltage are equal, and the DC voltage is greater than the first voltage, the battery voltage and described
Supply voltage.
4. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein the farad capacitor module packet
It includes:
Input resistance, one end receive the DC voltage；
Farad capacitor array, including one or more farad capacitors have anode and cathode, wherein the anode is couple to institute
The other end of input resistance is stated, and exports the first voltage, cathode is coupled to systematically；
Farad capacitor protective module, including one or more farad capacitors protect circuit, and each farad capacitor protects the same institute of circuit
Farad capacitor to be protected is arranged in parallel
Diode is isolated, the isolating diode is connected with the input resistance, and the anode of the isolating diode is the same as described straight
The cathode of galvanic electricity pressure coupling, the isolating diode is mutually coupled with the anode of the farad capacitor array.
5. as claimed in claim 4 based on the electronic access control system of uninterruptible power supply, wherein the farad capacitor protects circuit
With first input end, the second input terminal and a leakage current output end, the first input of the farad capacitor protection circuit
Higher one end of voltage of corresponding the protected farad capacitor of end coupling, the second input terminal coupling of the daraf(reciprocal of farad) capacitance protection circuit
It is connected to lower one end of voltage of the farad capacitor, it is described to let out to sense the voltage at current shielded farad capacitor both ends
Discharge stream output end protects the second input terminal of circuit mutually to couple by a bleeder resistor with the farad capacitor, when the method
When the both end voltage of capacitor being drawn to be more than predetermined threshold, the leakage current output end protects the first of circuit with the farad capacitor
Input terminal is connected, and forms aerial drainage circuit with bleeder resistor, makes shielded two terminal shortcircuit aerial drainage of farad capacitor.
6. as claimed in claim 4 based on the electronic access control system of uninterruptible power supply, wherein the farad capacitor protects circuit
With first input end, the second input terminal and a leakage current output end, the first input of the farad capacitor protection circuit
Higher one end of voltage of corresponding the protected farad capacitor of end coupling, the second input terminal coupling of the daraf(reciprocal of farad) capacitance protection circuit
It is connected to lower one end of voltage of the farad capacitor, it is described to let out to sense the voltage at current shielded farad capacitor both ends
Discharge stream output end is mutually coupled by a bleeder resistor homologous ray, when the both end voltage of the farad capacitor is more than predetermined threshold
When value, the leakage current output end is connected with the first input end of farad capacitor protection circuit, and with bleeder resistor shape
At aerial drainage circuit, make shielded two terminal shortcircuit aerial drainage of farad capacitor.
7. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein the power supply switching module packet
It includes:
Switching signal driving circuit, the switching signal driving circuit have switching signal input terminal and driving signal output end,
The switching signal input terminal receives the outage detection signal from the outage detection module, is examined according to the power-off
Signal is surveyed, exports switching driving signal in driving signal output end；
First switching switch, has first end, second end and control terminal, wherein first end coupling receives the battery electricity
Pressure, the control terminal receive the switching driving signal；
Second switching switch, has first end, second end and control terminal, opens wherein the first end is couple to first switching
The second end of pass, and the supply voltage is exported, the second end coupling receives the first voltage, and the control terminal reception is cut
Change driving signal
Wherein when external power supply is normal, the switching driving signal makes the first switching switch OFF, and described second cuts
Switch conduction is changed, supply voltage first voltage as provided by the farad capacitor module provides；
When external power supply interrupts, the switching driving signal responds the outage detection signal, so that first switching is opened
Close conducting, the second switching switch OFF, so that the supply voltage is provided by the cell voltage.
8. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein the power supply switching module includes
Relay and control switch, the relay are a double-throw type relay, and the relay control circuit part is the same as the control
System switch be coupled in series in the supply voltage and it is described systematically between, one end of the output loop of the relay has the
One contact, is connected to the supply voltage, and the other end has the second contact and third contact, is connected respectively to the first voltage
With the cell voltage, the control switch controls open and close by the outage detection signal.
9. as described in claim 1 based on the electronic access control system of uninterruptible power supply, in which:
The access controller is a microcontroller, receives gate inhibition's identification signal, raw according to gate inhibition's identification signal
At access control signal, prompt whether open gate inhibition；
The battery module includes power input, for receiving the supply voltage as the battery module power supply,
The battery module further comprises DC-DC (DC-DC) power module, DC-DC control signal generator, and DC-DC is anti-
Sensing circuit and battery are presented, the DC-DC power module receives the supply voltage, exports a charging voltage as institute
Battery charging is stated, the DC-DC feedback sense circuit generates respectively according to the charging voltage and charging current of the battery
Digitized voltage feedback signal and digitized current feedback signal；
The DC-DC control signal generator includes the microcontroller, is received respectively and according to the outage detection signal, institute
Digitized voltage feedback signal and the digitized current feedback signal are stated, generate digitized pulse-width signal
(PWM), for controlling the DC-DC power module, wherein after outage detection signal prompt power-off, the microcontroller
The no longer enabled output pwm signal of device, to stop driving the DC-DC power module, so that the battery is transferred to electric discharge
Mode.
10. as described in claim 1 based on the electronic access control system of uninterruptible power supply, wherein the gate inhibition act device include after
Electric appliance, electromagnet and control switch and current-limiting resistance, in which:
The relay is a double-throw type relay, and control loop part is coupled in series in the power supply with the control switch
Voltage and it is described systematically between, one end of the output loop of the relay has the first contact, is connected to the electromagnet
One end, the other end of the relay has the second contact and third contact, is connected respectively to the supply voltage and described
Systematically, the other end of the electromagnet is connected to the supply voltage by the current-limiting resistance, and the control switch is by institute
State access control signal control open and close.
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| CN201910388197.3A CN110071574A (en) | 2019-05-10 | 2019-05-10 | Electronic access control system based on uninterruptible power supply |
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| CN201910388197.3A CN110071574A (en) | 2019-05-10 | 2019-05-10 | Electronic access control system based on uninterruptible power supply |
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| CN111948570A (en) * | 2020-08-14 | 2020-11-17 | 厦门熵基科技有限公司 | Access control auxiliary input control system and line detection method |
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Application publication date: 20190730 |