CN209659002U - 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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- CN209659002U CN209659002U CN201920671205.0U CN201920671205U CN209659002U CN 209659002 U CN209659002 U CN 209659002U CN 201920671205 U CN201920671205 U CN 201920671205U CN 209659002 U CN209659002 U CN 209659002U
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Abstract
The utility model provides a kind of electronic access control system based on uninterruptible power supply, and 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 utility model relates to electronic technology fields, 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 supply be broadly divided into it is online and after
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.
Utility model content
The purpose of this utility model is to provide a kind of electronic access control systems based on uninterruptible power supply, comprising: Men Jinshi
Other 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, prompts whether open gate inhibition；Gate inhibition acts device, is controlled according to the gate inhibition
Signal processed, Lai Kaiguan gate inhibition；Wherein, the supply voltage of the electronic access control system is provided by uninterruptible power supply, described uninterrupted
Power supply includes farad capacitor module, outage detection module, battery module and power supply switching module, and the uninterruptible power supply receives
One from external DC voltage, in which: the farad capacitor module has an input terminal, receives the DC voltage as institute
The farad capacitor charging in farad capacitor module is stated, and according to the DC voltage, by the farad capacitor in the farad electricity
The output end of molar block 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 exports an outage detection signal in a signal output end, and the outage detection signal mentions
Show whether external power supply powers off；The battery module has input terminal and output end, and the output end of the battery module is defeated
A cell voltage out；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, second input wherein the first input end is connected to the farad capacitor module
End is connected to the output end of the battery module, receives the cell voltage, the third input terminal is connected to the power-off
The signal output end of detection module, receives the outage detection signal, the voltage output end according to the first voltage,
The cell voltage and the outage detection signal, export the supply voltage, supply load, the supply voltage further by
The input terminal of the battery module receives.
The beneficial effect of the utility model embodiment include: in entire power down handoff procedure, it is defeated by farad capacitor module
First voltage out provides supply voltage, so that supply voltage not will receive the influence of handoff response delay, realizes no seaming and cutting
It changes.In this way, power down failure phenomenon will not occur for electronic access control system whole process, while also reducing the energy in course of normal operation
Consumption.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 shows the system framework schematic diagram of the uninterruptible power system 100 according to the utility model one embodiment；
Fig. 2 shows the circuit diagrams according to the farad capacitor module 102 of the utility model one embodiment；
Fig. 3 shows the electrical block diagram of the outage detection module 103 according to the utility model one embodiment；
Fig. 4 shows the electrical block diagram according to the battery module 104 in the utility model one embodiment；
Fig. 5 A shows the electrical block diagram of the power supply switching module 105 according to the utility model one embodiment；
Fig. 5 B shows the electrical block diagram of the power supply switching module 105 according to another embodiment of the utility model.
Fig. 6 shows the circuit diagram of the AC-DC module 101 of the utility model one embodiment；
Fig. 7 shows the electronic access control system 700 based on uninterruptible power supply according to the utility model one embodiment；
Fig. 8 shows the schematic diagram of the access controller 702 according to the utility model one embodiment.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
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.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " coupling
Connect ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
Fig. 1 shows the system framework schematic diagram of the uninterruptible power system 100 according to the utility model one embodiment.
As shown in Figure 1, uninterruptible power system 100 receives the DC voltage VDC from an AC-DC (AC-DC) power supply 101,
AC-DC power supply 101 has an ac input end 1011, and ac input end 1011 receives alternating voltage VAC.In illustrated embodiment
In, alternating voltage VAC is line voltage 220V, and in other embodiments, alternating voltage VAC can also be selected according to application scenarios
Other ac voltages.AC-DC power supply 101 also has a direct current output 1012, exports DC voltage VDC.Implement in diagram
VDC is 15V in example.
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 is 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 according to the farad capacitor module 102 of the utility model one embodiment.As shown in Fig. 2, farad
Capacitance module 102 includes: input resistance 201, farad capacitor array 202 and farad capacitor protective module 203.Wherein, input electricity
Resistance 201 is coupled between DC voltage VDC and the anode of farad capacitor array 202.Farad capacitor array 202 include one or
Multiple farad capacitors, it is preferred that farad capacitor array 202 includes multiple farad capacitors being one another in series.Such as implement in diagram
In example, farad capacitor array 202 is composed in series by 6 farad capacitors, and single farad capacitor pressure resistance is 2.7V, capacitance 500F.
It in other embodiments, can be according to the actual needs of first voltage VCC1 and the practical pressure voltage of single farad capacitor, to determine
Determine the quantity of farad capacitor in farad capacitor array 202.The anode output first voltage VCC1 of farad capacitor array 202.Farad
Capacitor protective module 203 may include one or more protection circuits, and each protection circuit is the same as corresponding in farad capacitor array 202
The farad capacitor of protection is arranged in parallel, to prevent farad capacitor over-voltage or overshoot.For example, in the illustrated embodiment, farad electricity
There are molar block 102 6 farad capacitors to protect circuit.Specifically, farad capacitor protection circuit can use Shenzhen must Weir section
The BW6101 type super capacitor charge protection chip that skill Co., Ltd produces.Each farad capacitor protection circuit has one first
Input terminal PVIN, one second input terminal PGND, a leakage current output end PIOUT and an optional indication end PLED.
Higher one end of voltage of corresponding the protected farad capacitor of first input end PVIN coupling, the second input terminal PGND are couple to this
Lower one end of the voltage of farad capacitor, to sense the voltage at current shielded farad capacitor both ends.Leakage current output
End IOUT 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
When value, leakage current output end PIOUT with first input end PVIN connect, and bleeder resistor PR1 formed aerial drainage circuit, make by
The two terminal shortcircuit aerial drainage of farad capacitor of protection, avoids voltage from continuing to increase.Optionally, indication end PLED can be shone by one
Diode is coupled to the second input terminal PGND, to indicate the state of current farad capacitor.In another embodiment, vent discharge
Stream input terminal IOUT can also be directly coupled to systematically GND by bleeder resistor PR1, and indication end PLED can be sent out by one
Optical diode is coupled directly to systematically GND.
In one embodiment, farad capacitor module 102 further comprises the same input resistance of isolating 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 when DC voltage VDC falls and presses, by farad capacitor array 202 exported first electricity
Pressure 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 the outage detection module 103 according to the utility model one embodiment.Such as
Shown in Fig. 3, 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, is coupled to AC-DC power supply
Between DC output end 1012 and systematically GND, one feedback voltage V FB of partial pressure output.Reference voltage generator generates one
Reference voltage VREF.In the illustrated embodiment, reference voltage generator is an adjustable resistance pressure-dividing network, is coupled in and compares
Device supply voltage (such as 12V) homologous ray between GND, an an including fixed resistance REF1 and rheostat REFV, variable resistance
The voltage adjusting end outputting reference voltage VREF of device REFV.Comparator 302 has normal phase input end 3021,3022 He of inverting input terminal
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 exports 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, it can be used in those skilled in the art
The comparator of his type or model simultaneously carries out corresponding connection adaptation, and repeats no more herein.Optionally, rear class signal generator
304 receive comparison result signal VH as outage detection signal Voff, and VH is optionally carried out conversion and forms digitized break
Power detection signal TADC, for comparison result to be adapted to input rear class Digital Logical Circuits, such as microcontroller (MCU), number
Signal processor (DSP), programmable logic circuit (PLC) or field programmable gate array (FPGA) etc..In illustrated embodiment
In, rear class signal generator 304 is a resitstance voltage divider, conversion signal TADC is exported by partial pressure end, in other embodiments,
Rear class signal generator 304 can also realize analog-to-digital conversion using other common modulus signal conversion circuits in the prior art.
Fig. 4 shows the electrical block diagram according to the battery module 104 in the utility model one embodiment.Such as
Shown in Fig. 4, battery module 104 includes power input 1041, for receiving supply voltage VCC as battery module electricity
Source.Battery module 104 further comprises: direct current-direct current (DC-DC) power module 1042, DC-DC control signal generator
1043, DC-DC feedback sense circuits 1044 and battery 1045.Wherein, in the illustrated embodiment, DC DC power supply mould
Block 1042 be voltage-dropping type (Buck) synchronous rectification dc voltage changer, including master power switch (i.e. upper tube) HS with it is synchronous
Rectifier switch (i.e. down tube) LS and rear class LC filter.Master power switch HS has first end, second end and control terminal,
In, 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 main power and opens
The second end of HS, output chopping signal SW to rear class LC filter are closed, second end is 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 with it is synchronous whole
Flowing switch LS is Metal-Oxide Semiconductor field-effect tube (MOSFET).Rear class LC filter may include a LC filtering net
Network, i.e. outputting inductance Lout and output capacitance Cout receive chopping signal SW, export charging voltage Vch, are couple to battery
1045 anode charges to battery 1045.The anode output cell voltage VBAT of battery 1045.DC-DC sensing electricity
Road 1044 may include voltage sensing circuit 401 and current sensing circuit 402.Wherein, voltage sensing circuit 401 can be an electricity
Resistance divider be coupled to charging voltage Vch and systematically between, sensing generate charging voltage feedback signal VADC.It is real in diagram
It applies in example, charging voltage feedback signal VADC adapts to Digital Logical Circuits.Similar, current sensing circuit 402 includes one
Sensing resistance Rsense is coupled between anode of the charging voltage Vch with battery 1045, a sensing amplifier IAmp, tool
There are first input end, the second input terminal and output end, wherein first input end and the second input terminal are connected respectively to sensing resistance
The both ends of Rsense, output end export a digitized current feedback signal IADC.In the illustrated embodiment, sensing amplifier
IAmp can be based on using the LM358 type integrated operational amplifier produced by Texas Instruments, same periphery resistance composition
Amplifier is realized.The proportional amplifier structure is known to those skilled in the art, therefore details are not described herein again.Implement in diagram
In example, DC-DC control signal generator 1043 includes a microcontroller, receives digitized outage detection signal respectively
TADC, digitized voltage feedback signal UADC and digitized current feedback signal IADC, and according to three signal, it generates
Digitized pulsewidth modulation (PWM) signal, input driving circuit DR.Wherein, after outage detection signal TADC prompts to power off,
Microcontroller will no longer enable output pwm signal, to stop driving DC-DC power module 1042, so that battery 1045
It is transferred to discharge mode.When outage detection signal TADC prompt does not power off, microcontroller will be according to digitized Voltage Feedback
Signal UADC and digitized current feedback signal IADC, to determine the duty ratio of digitized pwm control signal, with control
DC-DC power module 1042 is correctly charged or is kept voltage to battery 1045.The PWM that driving circuit DR will be received
Signal is converted into upper tube control signal HO and down tube control signal LO respectively, and master power switch HS and synchronous rectification are opened in realization
Close the control of LS.In the illustrated embodiment, microcontroller can be realized using any chip that can be realized Digital Logic,
Such as Intel (Intel) company 8051 Series MCU chips or (ST) company, STMicw Electronics production STM32 series
MCU chip.Input driving circuit DR can be realized using the IR2104 type semibridge system driving chip of international rectifier (IR) company.
In other embodiments, control signal can also be generated using traditional analog DC-DC controller.For example, can use
The MP2905 type DC-DC controller of Xin Yuan System Co., Ltd (MPS) production, Lai Shengcheng pwm control signal are passed through with substitution
MCU generates digital PWM signal.
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 use booster converter (Boost) or inverse excitation type converter (Fly-back)
Topology realizes, DC-DC power source signal generator 1043 can be generated the bandwidth different from PWM modulation and modulate (PFM) signal, or
Person's selection is realized using constant on-time (Constant On-time) control mode.The realization of above scheme belongs to ability
The scope that domain those of ordinary skill will appreciate that, therefore details are not described herein again.
Fig. 5 A shows the electrical block diagram of the power supply switching module 105 according to the utility model one embodiment.
As shown in Figure 5A, power supply switching module 105 includes switching signal driving circuit 501, and the first switching switch 502 and the second switching are opened
Close 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
Signal output end is according to outage detection signal Voff, output switching driving signal SDR.First switching switch 502 has first end,
Second end and control terminal, wherein first end coupling receives cell voltage VBAT, and control terminal receives switching driving signal SDR.Second
Driving 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, control terminal receives switching driving signal SDR.It is preferred that
, the 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 first to cut
The shutdown of switch 502 is changed, the second switching switch 503 is connected, supply voltage VCC first electricity as provided by farad capacitor module 102
Press VCC1 power supply.Farad capacitor module 102 is linked into VDC, and lasting charging keeps the stabilization of first voltage VCC1.When alternating current supplies
When should interrupt, in the output end of AC-DC module decline suddenly, decline of the outage detection signal Voff in response to VDC occur for VDC
It is accordingly changed into high level.And during operating lag, farad capacitor module 102, can be still short after losing VDC
The temporary stabilization of VCC1 is kept in time.Hereafter, switching driving signal SDR responds outage detection signal Voff, so that first cuts
The conducting of switch 502 is changed, the second switching switch 503 turns off, so that supply voltage VCC is provided by the voltage VBAT of battery 1045.
At this point, supply voltage VCC once more charges to farad capacitor module 102, so that the first voltage VCC1 of farad capacitor module is returned
Return primary voltage value.
Fig. 5 B shows the electrical block diagram of the power supply switching module 105 according to another embodiment of the utility model.
As shown in Figure 5 B, power supply switching module 105 includes relay 511 and control switch 512.Wherein, relay 511 is one
Double-throw type relay, control loop part with control switch 512 are coupled in series in supply voltage VCC and systematically between GND.
First contact of one end of the output loop of relay 511 is connected to supply voltage VCC, the second contact of the other end and third touching
Point is connected respectively to first voltage VCC1 and cell voltage VBAT.Control switch 512 is controlled by outage detection signal Voff and is closed
And disconnection.
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, and the input of relay 511 is returned
The coil of road is powered, and adsorbs the first contact of output loop, so that the first contact is disconnected with the second contact, and with third contact
Connection.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 the utility model one embodiment.As shown in fig. 6, AC-
DC module 101 includes transformer 601, rectifier bridge 602 and filter circuit 603.Wherein the primary side of transformer 601 is as exchange input
End 1011 is couple to electricity network, receives VAC.Secondary side is couple to two input terminals of rectifier bridge 602.In the illustrated embodiment, whole
Flowing bridge 602 is a full bridge rectifier bridge.In other embodiments, rectifier bridge 602 can also use Half bridge rectifier.Rectifier bridge 602
An output end be couple to the input terminal of filter circuit 603, the other end is as systematically GND.In illustrated embodiment, filtered electrical
Road 603 by two polar capacitors and two polarity free capacitors be connected in parallel on input terminal and systematically between.The output of filter circuit 603
The output end 1012 as AC-DC module 101 is held, 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 according to the utility model one embodiment.Such as
Shown in Fig. 7, electronic access control system 700 includes: that gate inhibition identifies interface 701, and access controller 702 and gate inhibition act device 703.Wherein
Gate inhibition identifies that interface 701 according to external input, generates gate inhibition's identification signal GS.Gate inhibition identifies that interface 701 can be any
The device of access information input can be carried out, for example, gate inhibition identifies that interface 701 is radio frequency identification (RFID) card reader, is led to
Reading passive radio frequency label is crossed, gate inhibition's identification signal GS is generated.Gate inhibition identifies that interface can also be a code keyboard input
Device, perhaps be finger print input device or recognition of face, scanning means of iris recognition etc., the utility model to this not
It is restricted.
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,
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
Third contact, i.e., by one end homologous ray of electromagnet 732 GND connection, the other end are connected to power supply electricity by current-limiting resistance 734
VCC is pressed, current path is formed.There is electric current to flow through electromagnet 732 at this time, generate magnetic-adsorption gate inhibition, so that access control system maintains
Gate inhibition closes.And if access controller 702 is thought to identify successfully, it exports access control signal GC and makes control switch 733
It is closed, 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
It is connected 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 above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
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
Isolating diode, the isolating diode are 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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Effective date of registration: 20220318 Address after: 518000 b1403, niulanqian building, Minzhi Avenue, Xinniu community, Minzhi street, Longhua District, Shenzhen, Guangdong Province Patentee after: Shenzhen Tianhe Technology Co.,Ltd. Address before: No.24, Xuefu Road Section 1, Southwest Airport Economic Development Zone, Shuangliu District, Chengdu, Sichuan 610225 Patentee before: CHENGDU University OF INFORMATION TECHNOLOGY |