CN105809792B - Circuit and biological identification device, gate control system for long-distance transmissions - Google Patents
Circuit and biological identification device, gate control system for long-distance transmissions Download PDFInfo
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- CN105809792B CN105809792B CN201610143502.9A CN201610143502A CN105809792B CN 105809792 B CN105809792 B CN 105809792B CN 201610143502 A CN201610143502 A CN 201610143502A CN 105809792 B CN105809792 B CN 105809792B
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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
-
- 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
- G07C9/00563—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
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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
- G07C2009/00579—Power supply for the keyless data carrier
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- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of circuit for long-distance transmissions and biological identification device, gate control system, the circuit includes：Level input, first resistor, second resistance, first switch, second switch, 3rd switch and level output end, the level input is connected by the control terminal of first resistor and first switch, the first end of the first switch is connected by second resistance with power supply, the second end ground connection of the first switch, the first end of first switch is connected with second switch and the 3rd control terminal switched respectively, the first end of second switch is connected with the first end of the 3rd switch, the first end connection level output end of second switch, the second end ground connection of second switch, second end of the 3rd switch is connected with power supply.By the above-mentioned means, the deformation of transmission signal quality and the generation of other problemses caused by solving long-distance transmissions circuit signal driving force difference.
Description
Technical field
The present invention relates to electronic circuit technology field, more particularly to a kind of circuit and biology for long-distance transmissions is known
Other device, gate control system circuit.
Background technology
Usual electronic access equipment is mainly carried out data transmission using Wiegand signal, but the transmission of common TTL signal
Distance is within meter level scope.Common electronic access equipment, (generally the collection such as fingerprint, iris compares sets identification control terminal
It is standby) and door lock control terminal (switch that door lock is directly controlled by access controller) it is closer to the distance, above-mentioned technology can meet day
Often primary demand in life, but it is usual in the requirement of the safe classes such as finance, national defence high place or field, door lock control terminal
Need to be placed on the very high computer room of level of security, so resulting in placement location and the placement of door lock control terminal of identification control terminal
Position it is distant, it is even farther to generally require to reach tens of rice.
The transmission range of data signal is more remote, and the electromagnetic interference being subject to is then stronger, and the decay of signal in itself is also more severe,
Long-distance transmissions line when transmitting data-signal, the signal quality of line end can gross distortion, cause door lock control terminal without
Method normally parses data-signal, and then causes signal bust this, prevents whole system from the operation in reservation.
As shown in figure 1, it is a kind of circuit for long-distance transmissions disclosed in prior art, when level input input is low
During level, triode Q1 disconnects, and level output end is pulled to 5V, level output end output high level by resistance R2；Work as level
During input input high level, triode Q1 closures, level output end (OUT terminal) is pulled to ground wire by resistance R2, and output is low
Level.Prior art circuits are directly driven by Q1 and pull-up resistor R2, but driving current very little, the circuit according to Fig. 1
Parameter, its electric current are equal to 5V divided by R2 resistances, and the driving current of realization only has 0.5mA, and the length of transmission line is longer, itself
Resistance is bigger, and caused loss of signal is also bigger, so reducing the impedance of drive end will preferentially consider, simplest method
It is the resistance for the resistance for reducing R2, by reducing the resistance, increases the driving intensity of output signal, still, only change the resistance
Value can not obtain preferable effect to increase the way of the driving intensity of output signal, and main cause is that the resistance is smaller,
It is also bigger by the electric current of the resistance when Q1 is turned on, cause equipment power dissipation also bigger, moreover, resistance R2 is simply customized
Resistance, after parameter setting is good, the resistance is not appropriate for using under every kind of environment.
The content of the invention
The technical problem such as signal driving force difference during in order to solve long-distance transmissions in the prior art, the present invention provide a kind of
For the circuit of long-distance transmissions, including：
Level input, first resistor, second resistance, first switch, second switch, third switch and level output end,
The level input is connected by the control terminal of first resistor and first switch, and the first end of the first switch passes through second
Resistance is connected with power supply, the second end of first switch ground connection, the first end of first switch respectively with second switch and the 3rd
The control terminal connection of switch, the first end of second switch are connected with the first end of the 3rd switch, the first end connection of second switch
Level output end, the second end ground connection of second switch, the second end of the 3rd switch is connected with power supply；
When the level input input low level, first switch is off, and the 3rd switch is in disconnection shape
State, second switch are in closure state；
When the level input input high level, first switch is in closure state, and the 3rd switch is in closed form
State, second switch are off.
Invention additionally provides a kind of biological identification device, including the described circuit for long-distance transmissions.
Present invention also offers a kind of bio-identification gate control system, including gate inhibition's controlled terminal, the gate control system is also wrapped
Above-mentioned biological identification device is included, level output end connects the input of gate inhibition's controlled terminal.
The technical scheme of the present invention has advantages below or beneficial effect：
The invention provides a kind of circuit for long-distance transmissions, the structure of the circuit is simple, compared with prior art,
When the level input input high level, first switch is in closure state, and the 3rd switch is in closure state, and second opens
Pass is off, and level input connects power supply by the 3rd switch, realizes the output of high level, exports the electric current
Driving intensity directly depends on the power supply capacity of power supply and the driving force of the 3rd switch so that the output current of level output end
Driving intensity enhancing, it is even more big to can generally achieve an ampere, and guarantee is provided for distant signal transmission, and should
Circuit resistance to overturning is strong, while will not increase power consumption, is adapted to the application of various scenes, solves long-distance transmissions circuit drives
The deformation of transmission signal quality and the generation of other problemses caused by ability.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of circuit for long-distance transmissions of prior art；
Fig. 2 is the schematic diagram of the circuit for long-distance transmissions of one embodiment of the invention；
Fig. 3 is the schematic diagram of the circuit for long-distance transmissions of a preferred embodiment of the invention；
Fig. 4 is the schematic diagram of the circuit for long-distance transmissions of another preferred embodiment of the present invention；
Fig. 5 is the schematic diagram of the circuit for long-distance transmissions of another embodiment of the invention；
Fig. 6 is the schematic diagram of the circuit for long-distance transmissions of further embodiment of the present invention；
Fig. 7 is the schematic diagram of the circuit for long-distance transmissions of another embodiment of the present invention；
Fig. 8 is the schematic diagram of the circuit for long-distance transmissions of another embodiment of the invention；
Fig. 9 is the schematic diagram of the circuit for long-distance transmissions of further embodiment of the present invention；
Figure 10 is the block diagram of the biological identification device of one embodiment of the invention；
Figure 11 is the block diagram of the bio-identification gate inhibition of one embodiment of the invention.
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings so that the invention solves technology ask
Topic, technical scheme and advantage are easier to be readily appreciated by one skilled in the art, more clear so as to be made to protection scope of the present invention
Chu clearly defines.
On the one hand, the embodiments of the invention provide a kind of circuit for long-distance transmissions, the circuit is as shown in Fig. 2 bag
Level input, first resistor, second resistance, first switch, second switch, third switch and level output end are included, wherein institute
State level input to connect by the control terminal of first resistor and first switch, the first end of the first switch passes through the second electricity
Resistance is connected with power supply, and the second end ground connection of the first switch, the first end of first switch is opened with second switch and the 3rd respectively
The control terminal connection of pass, the first end of second switch are connected with the first end of the 3rd switch, the first end connection electricity of second switch
Flat output end, the second end ground connection of second switch, the second end of the 3rd switch is connected with power supply.In the present embodiment, the circuit
Under working condition, the first switch, as the second switch and the 3rd driving switch switched, is not being joined in this circuit
With the transmission of signal, when the level input input low level, first switch is off, and the 3rd switch is in disconnected
Open state, second switch are in closure state, and level output end realizes low level output；When the level input inputs high electricity
Usually, first switch is in closure state, and the 3rd switch is in closure state, and second switch is off, level output
Realize high level output in end.
In the present embodiment, when the level input input high level, first switch is in closure state, the 3rd switch
In closure state, second switch is off, and level output end connects power supply by the 3rd switch, realizes high level
Output, the driving intensity for exporting the electric current directly depends on the power supply capacity of power supply and the driving force of second switch so that
The driving intensity enhancing of the output current of level output end, it is even more big to can generally achieve an ampere, is distant signal
Transmission provides guarantee, and the circuit resistance to overturning is strong, while will not increase power consumption, is adapted to the application of various scenes, solution
The deformation of transmission signal quality and the generation of other problemses caused by long-distance transmissions of having determined circuit drives ability.
Preferably, as shown in figure 3, first switch described in the present embodiment is NPN type triode, the control of the first switch
End processed is base stage, and the first end of the first switch is colelctor electrode, and the second end of the first switch is emitter stage.
Further, the level input is connected by first resistor with the base stage of the NPN type triode, described
The colelctor electrode of NPN type triode is connected by second resistance with power supply, the grounded emitter of the NPN type triode.
Preferably, as shown in figure 4, second switch described in the present embodiment is N-type metal-oxide-semiconductor, the control of the second switch
It is to drain to hold as grid, the first end of second switch, and the second end of second switch is source electrode；3rd switch is p-type MOS
Pipe, the control terminal of the 3rd switch is grid, and the first end of the 3rd switch is drain electrode, and the second end of the 3rd switch is source electrode.
Further, the grid of the N-type metal-oxide-semiconductor and p-type metal-oxide-semiconductor and the colelctor electrode of NPN type triode connect, the N
The drain electrode of type metal-oxide-semiconductor is connected with the drain electrode of the p-type metal-oxide-semiconductor, and the drain electrode of N-type metal-oxide-semiconductor connects the level output end, described
The source ground of N-type metal-oxide-semiconductor, the source electrode connection power supply of the p-type metal-oxide-semiconductor.
In above preferred embodiment, as level input input high level (for example, 1.8-5V), NPN type triode
Open, the linkage section output low level between second resistance and triode, so as to which p-type metal-oxide-semiconductor is opened, the shut-off of N-type metal-oxide-semiconductor, electricity
Flat output end connects power supply by p-type metal-oxide-semiconductor, realizes the output of high level, the driving intensity for exporting the electric current directly depends on
In the power supply capacity of power supply and the driving force of p-type metal-oxide-semiconductor so that the driving intensity enhancing of the output current of level output end,
It is even more big to can generally achieve an ampere, guarantee is provided for distant signal transmission.
As it is a kind of for example, first switch, second switch in the embodiment of the present invention and the 3rd switch can be after
Electrical equipment.
One kind as above preferred embodiment is improved, as shown in figure 5, the circuit for long-distance transmissions also includes
One filter circuit, the filter circuit include the first inductance, the first electric capacity and the second electric capacity, and first inductance is arranged at power supply
Between second resistance, the first end of the first inductance connects the first end of the first electric capacity, the electricity of the second end connection second of the first inductance
The first end of appearance, the second end of first electric capacity are grounded with the second end of the second electric capacity.
In addition, the filter circuit can also substitute above-mentioned first inductance, first using low pressure difference linear voltage regulator LDO
The filter circuit of electric capacity and the second electric capacity composition, has more excellent effect.
Mainly use+5v represents high level 1 to Wiegand signal, and GND represents low level 0, and the data signal exported is by+5v's
Power supply directly provides, but in digital circuit, the power supply to other equipments such as processors is also+5v, to processing after conversion
Device electricity consumption, when processor and conversion chip work, power supply can be made to produce some literary ripples or noise, such literary ripple or noise
The power quality of+5v power supplies can be directly affected, if power quality is bad, the signal containing Wen Bo or noise passes through transmission line
It can be exaggerated, ultimately result in signal bust this, furthermore Wiegand signal transmission only has several K speed, so needing to filter out high frequency
Noise.The present embodiment forms filter circuit (first inductance, the by the first inductance, the first electric capacity and the second electric capacity
The signal rate that the parameter of one electric capacity and the second electric capacity can be transmitted as needed is configured), effectively it can suppress and prevent
Noise caused by processor and the work of other modules enters transmission signal by power supply, further to ensure the steady of signal transmission
It is qualitative.
Another kind as above preferred embodiment improves, as shown in fig. 6, the circuit for long-distance transmissions also wraps
A protection circuit is included, the protection circuit includes self- recoverage insurance and transient voltage suppressor, the self- recoverage insurance
First end connects level output end, and the second end of self- recoverage insurance connects the first end of the second switch, the transient voltage
Suppress the second end of the first end connection self- recoverage insurance of diode, the second end ground connection of the transient voltage suppressor.
The interference that the external world is received when level output end introduces high-voltage signal, after the signal is insured by the self- recoverage,
The transient voltage suppressor then can turned on instantaneously, and a larger electric current can be produced by now flowing through self- recoverage insurance,
After the electric current exceedes certain threshold value, self- recoverage insurance can directly disconnect, so as to avoid other devices in circuit by
The harm of over-voltage and over-current.Under normal circumstances, if the interference of transmission line is excessive, larger voltage wave can be then produced on signal wire
It is dynamic, by above-mentioned protection circuit, protection effect can be played to circuit.
Further, it is described anti-as shown in fig. 7, the circuit for long-distance transmissions also includes an anti-interference device
Disturbance means are ferrite bean or the second inductance, and the anti-interference device is connected to the first end of second switch and self- recoverage is protected
Between danger.
Further, as shown in figure 8, the circuit for long-distance transmissions also includes one the 3rd electric capacity, the described 3rd
The first end of the first end connection second switch of electric capacity, the second end ground connection of the 3rd electric capacity.
The anti-interference device can produce higher resistance to high-frequency signal, be made an uproar so as to effectively suppress high put down in part
Sound, absorb the reflection in the circuit of part, crosstalk etc. and disturb.3rd electric capacity is a decoupling capacitor, and the electric capacity can prevent
Above-mentioned N-type metal-oxide-semiconductor and p-type the metal-oxide-semiconductor caused switching noise during switch, prevent from producing in the moment being opened or closed
The situation of overshoot occurs.In addition, the anti-interference device and the 3rd electric capacity also constitute a filter circuit, biography is further filtered out
High-frequency noise on defeated line, so as to be further ensured that the stability of signal transmission.
As another improvement of above-described embodiment, as shown in figure 9, the circuit for long-distance transmissions also includes one
3rd resistor, the first end of the 3rd resistor connect the control terminal of the first switch, the second end ground connection of 3rd resistor.
The 3rd resistor by pull down be grounded, to the circuit when initial power-on is started working an initial signal,
And then ensure that level output end is low level under original state, prevent that MCU initial launch inputs to level in biological identification device
The transmission signal state labile at end, some wrong operations are caused to equipment.
On the other hand, as shown in Figure 10, the embodiments of the invention provide a kind of biological identification device, above-mentioned implementation is included
Any described circuit for long-distance transmissions in example.
Biological identification device described in the present embodiment includes a bio-identification unit and described for long-distance transmissions
Circuit, the bio-identification unit enter to the biological characteristic of acquisition (such as fingerprint, face, iris, vocal print, palmmprint, referring to vein)
Row identification, control signal is generated according to recognition result, the control signal is generally from the MCU outputs in bio-identification unit, input
The level input of the circuit for long-distance transmissions described in above-described embodiment, and it is defeated from the level output end of the circuit
Go out.
In the present embodiment, by the circuit, the biological identification device has transmission signal quality height, driving force
By force, strong antijamming capability, the advantages such as protective capacities is strong.
Another further aspect, as shown in figure 11, the embodiments of the invention provide a kind of bio-identification gate control system, including gate inhibition by
Control terminal, in addition to above-mentioned biological identification device, described level output end connect the input of gate inhibition's controlled end.
Biological identification device is according to biological characteristic (such as fingerprint, face, iris, vocal print, the palm to acquisition in the present embodiment
Line, refer to vein etc.) it is identified, control signal is generated according to recognition result, the control signal is inputted described in above-described embodiment
The circuit for long-distance transmissions level input, and exported from the level output end of the circuit, by transmission line with
The input connection of gate inhibition's controlled terminal, gate inhibition's controlled terminal is parsed according to the control signal of input, according to parsing
As a result so access control lock open or close.
In the present embodiment, by the circuit, the bio-identification gate control system has transmission signal quality height, driving energy
Power is strong, strong antijamming capability, the advantages such as protective capacities is strong, solves prior art and letter is transmitted caused by the influence of transmission range
The deformation of number quality and the generation of other problemses.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
- A kind of 1. circuit for long-distance transmissions, it is characterised in that including：Level input, first resistor, second resistance, first switch, second switch, third switch and level output end, it is described Level input is connected by the control terminal of first resistor and first switch, and the first end of the first switch passes through second resistance It is connected with power supply, the second end ground connection of the first switch, the first end of first switch switchs with second switch and the 3rd respectively Control terminal connection, the first end of second switch is connected with the first end of the 3rd switch, and the first end of second switch connects level Output end, the second end ground connection of second switch, the second end of the 3rd switch is connected with power supply；When the level input input low level, first switch is off, and the 3rd switch is off, the Two switches are in closure state；When the level input input high level, first switch is in closure state, and the 3rd switch is in closure state, the Two switches are off；The first switch is NPN type triode, and the control terminal of the first switch is base stage, the first end of the first switch For colelctor electrode, the second end of the first switch is emitter stage；The second switch is N-type metal-oxide-semiconductor, and the control terminal of the second switch is grid, and the first end of second switch is drain electrode, Second end of second switch is source electrode；3rd switch be p-type metal-oxide-semiconductor, and the described 3rd control terminal switched is grid, the 3rd The first end of switch is drain electrode, and the second end of the 3rd switch is source electrode.
- 2. the circuit according to claim 1 for long-distance transmissions, it is characterised in that the circuit also includes a filtering Circuit, the filter circuit include the first inductance, the first electric capacity and the second electric capacity, and first inductance is arranged at power supply and second Between resistance, the first end of the first inductance connects the first end of the first electric capacity, and the second end of the first inductance connects the of the second electric capacity One end, the second end of first electric capacity are grounded with the second end of the second electric capacity.
- 3. the circuit according to claim 1 for long-distance transmissions, it is characterised in that the circuit also includes a protection Circuit, the protection circuit include self- recoverage insurance and transient voltage suppressor, and the first end of the self- recoverage insurance connects Level output end is connect, the second end of self- recoverage insurance connects the first end of the second switch, and the transient voltage suppresses two poles Second end of the first end connection self- recoverage insurance of pipe, the second end ground connection of the transient voltage suppressor.
- 4. the circuit according to claim 3 for long-distance transmissions, it is characterised in that the circuit further comprises anti-dry Device is disturbed, the anti-interference device is ferrite bean or the second inductance, and the anti-interference device is connected to the of second switch Between one end and self- recoverage insurance.
- 5. the circuit according to claim 4 for long-distance transmissions, it is characterised in that the circuit also includes one the 3rd Electric capacity, the first end of the first end connection second switch of the 3rd electric capacity, the second end ground connection of the 3rd electric capacity.
- 6. the circuit according to claim 1 for long-distance transmissions, it is characterised in that the circuit also includes one the 3rd Resistance, the first end of the 3rd resistor connect the control terminal of the first switch, the second end ground connection of 3rd resistor.
- 7. a kind of biological identification device, it is characterised in that including being used to pass at a distance as described in any in claim 1 to 6 Defeated circuit.
- 8. a kind of bio-identification gate control system, including gate inhibition's controlled terminal, it is characterised in that the gate control system is also included as weighed Profit requires the biological identification device described in 7, the input of level output end connection gate inhibition's controlled terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610143502.9A CN105809792B (en) | 2016-03-14 | 2016-03-14 | Circuit and biological identification device, gate control system for long-distance transmissions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143502.9A CN105809792B (en) | 2016-03-14 | 2016-03-14 | Circuit and biological identification device, gate control system for long-distance transmissions |
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| CN105809792A CN105809792A (en) | 2016-07-27 |
| CN105809792B true CN105809792B (en) | 2018-02-13 |
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| CN201610143502.9A Active CN105809792B (en) | 2016-03-14 | 2016-03-14 | Circuit and biological identification device, gate control system for long-distance transmissions |
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| CN107424257A (en) * | 2017-06-15 | 2017-12-01 | 东莞市腾达五金制品有限公司 | A kind of intelligent lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188432A (en) * | 2006-11-17 | 2008-05-28 | 华立仪表集团股份有限公司 | ZigBee wireless communication module for middle and remote distance communication |
| CN103149892A (en) * | 2013-01-29 | 2013-06-12 | 哈尔滨工业大学 | Control system with long-distance control function |
| CN105243045A (en) * | 2015-10-19 | 2016-01-13 | 扬州峰威新能源科技有限公司 | Long-distance transmission I2C bus communication interface circuit |
-
2016
- 2016-03-14 CN CN201610143502.9A patent/CN105809792B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188432A (en) * | 2006-11-17 | 2008-05-28 | 华立仪表集团股份有限公司 | ZigBee wireless communication module for middle and remote distance communication |
| CN103149892A (en) * | 2013-01-29 | 2013-06-12 | 哈尔滨工业大学 | Control system with long-distance control function |
| CN105243045A (en) * | 2015-10-19 | 2016-01-13 | 扬州峰威新能源科技有限公司 | Long-distance transmission I2C bus communication interface circuit |
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Effective date of registration: 20220318 Address after: 071800 Beijing Tianjin talent home (Xincheng community), West District, Xiongxian Economic Development Zone, Baoding City, Hebei Province Patentee after: BEIJING EYECOOL TECHNOLOGY Co.,Ltd. Patentee after: Beijing Eyes Intelligent Technology Co.,Ltd. Address before: 100085, 1 floor 8, 1 Street, ten Street, Haidian District, Beijing. Patentee before: Beijing Eyes Intelligent Technology Co.,Ltd. |
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Denomination of invention: Circuit for long-distance transmission, biometric device and access control system Effective date of registration: 20220614 Granted publication date: 20180213 Pledgee: China Construction Bank Corporation Xiongxian sub branch Pledgor: BEIJING EYECOOL TECHNOLOGY Co.,Ltd. Registration number: Y2022990000332 |
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