CN105809792A - Circuit for remote transmission and biological recognition device and access control system - Google Patents
Circuit for remote transmission and biological recognition device and access control system Download PDFInfo
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- CN105809792A CN105809792A CN201610143502.9A CN201610143502A CN105809792A CN 105809792 A CN105809792 A CN 105809792A CN 201610143502 A CN201610143502 A CN 201610143502A CN 105809792 A CN105809792 A CN 105809792A
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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
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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
- 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 circuit for remote transmission and a biological recognition device and access control system.The circuit comprises the electric level input end, a first resistor, a second resistor, a first switch, a second switch, a third switch and the electric level output end; the electric level input end is connected with the control end of the first switch through the first resistor, the first end of the first switch is connected with a power supply through the second resistor, the second end of the first switch is grounded, the first end of the first switch is connected with the control end of the second switch and the control end of the third switch, the first end of the second switch is connected with the first end of the third switch, the first end of the second switch is connected with the electric level output end, the second end of the second switch is grounded, and the second end of the third switch is connected with the power supply.In this way, the problem that transmitted signals generate quality deformation due to the fact that the signal driving capacity of the remote transmission circuit is poor and other problems are solved.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly to a kind of circuit for long-distance transmissions and biological identification device, gate control system circuit.
Background technology
Usual electronic access equipment mainly adopts Wiegand signal to carry out data transmission, but the transmission range of common TTL signal is within meter level scope.Common electronic access equipment, identify that controlling end (is generally fingerprint, iris etc. and gathers comparison equipment,) and door lock control end (directly being controlled the switch of door lock by access controller) close together, above-mentioned technology can meet primary demand in daily life, but high place or field is required in safe classes such as finance, national defence, door lock control end typically requires and is placed on the machine room that level of security is significantly high, identifying the distant of placement location that the placement location and the door lock that control end control end so resulting in, generally requiring that to reach tens of rice even farther.
The transmission range of digital signal is more remote, the electromagnetic interference being subject to is then more strong, the decay of signal itself is also more severe, long-distance transmissions line is when transmitting data signal, the signal quality meeting gross distortion of line end, cause that door lock controls end and cannot normally resolve data signal, and then cause signal bust this, make the whole system can not at the operation subscribed.
As it is shown in figure 1, disclosed in prior art a kind of circuit for long-distance transmissions, when level input input low level, audion Q1 disconnect, level output end is pulled to 5V by resistance R2, level output end export high level；When level input input high level, audion Q1 closes, and level output end (OUT terminal) is pulled to ground wire, output low level by resistance R2.nullPrior art circuits is directly driven by Q1 and pull-up resistor R2，But drive electric current only small，Circuit parameter according to Fig. 1，Its electric current is equal to 5V divided by R2 resistance，The driving electric current realized only has 0.5mA，And the length of transmission line is more long，Itself resistance is more big，The loss of signal caused is also more big，So the impedance reducing drive end preferentially to consider，Simplest method is the resistance of the resistance reducing R2，By reducing this resistance，Increase the driving intensity of output signal，But，The way only changing the driving intensity that this resistance increases output signal can not obtain desirable effect，Main cause is that this resistance is more little，When Q1 turns on，Also more big by the electric current of this resistance，Cause equipment power dissipation also more big，And，Resistance R2 simply customizes resistance，After parameter setting is good，This resistance is not appropriate under every kind of environment to use.
Summary of the invention
In order to solve prior art medium and long distance transmission time signal driving force difference etc. technical problem, the present invention provides a kind of circuit for long-distance transmissions, including:
Level input, first resistance, second resistance, first switch, second switch, 3rd switch and level output end, described level input is connected by the control end of the first resistance and the first switch, first end of described first switch is connected with power supply by the second resistance, second end ground connection of described first switch, first end of the first switch is connected with the control end of second switch and the 3rd switch respectively, first end of the first end of second switch and the 3rd switch connects, first end of second switch connects level output end, second end ground connection of second switch, second end of the 3rd switch is connected with power supply；
When described level input input low level, the first switch is off, and the 3rd switch is off, and second switch is in closure state；
When described level input input high level, the first switch is in closure state, and the 3rd switch is in closure state, and second switch is 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, described gate control system also includes above-mentioned biological identification device, and level output end connects the input of gate inhibition's controlled terminal.
One technical scheme of the present invention has the following advantages or beneficial effect:
nullThe invention provides a kind of circuit for long-distance transmissions，The simple in construction of this circuit，Compared with prior art，When described level input input high level，First switch is in closure state，3rd switch is in closure state，Second switch is off，Level input connects power supply by the 3rd switch，Achieve the output of high level，The driving intensity exporting this electric current directly depends on the power supply capacity of power supply and the driving force of the 3rd switch，Make the driving intensity enhancing of the output electric current of level output end，Can generally achieve an ampere even bigger，Guarantee is provided for distant signal transmission，And this circuit stability in the large is strong，Power consumption will not be increased simultaneously，It is suitable for the application of various scenes，Solve the generation transmitting signal quality deformation and other problems that long-distance transmissions drives ability causes.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind 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 present 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 present 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.
Detailed description of the invention
Below in conjunction with accompanying drawing, presently preferred embodiments of the present invention is described in detail, so that the technical problem to be solved in the present invention, technical scheme and advantage are easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention being made apparent clear and definite defining.
On the one hand, embodiments provide a kind of circuit for long-distance transmissions, this circuit is as shown in Figure 2, including level input, first resistance, second resistance, first switch, second switch, 3rd switch and level output end, wherein said level input is connected by the control end of the first resistance and the first switch, first end of described first switch is connected with power supply by the second resistance, second end ground connection of described first switch, first end of the first switch is connected with the control end of second switch and the 3rd switch respectively, first end of the first end of second switch and the 3rd switch connects, first end of second switch connects level output end, second end ground connection of second switch, second end of the 3rd switch is connected with power supply.In the present embodiment, under described circuit working state, the driving switch that described first switch switchs as described second switch and the 3rd in this circuit, not in the transmission participating in signal, when described level input input low level, the first switch is off, and the 3rd switch is off, second switch is in closure state, and level output end realizes low level output；When described level input input high level, the first switch is in closure state, and the 3rd switch is in closure state, and second switch is off, and level output end realizes high level output.
In the present embodiment, when described level input input high level, first switch is in closure state, 3rd switch is in closure state, second switch is off, level output end connects power supply by the 3rd switch, achieve the output of high level, the driving intensity exporting this electric current directly depends on the power supply capacity of power supply and the driving force of second switch, make the driving intensity enhancing of the output electric current of level output end, can generally achieve an ampere even bigger, guarantee is provided for distant signal transmission, and this circuit stability in the large is strong, power consumption will not be increased simultaneously, it is suitable for the application of various scenes, solve the generation transmitting signal quality deformation and other problems that long-distance transmissions drives ability causes.
Preferably, as it is shown on figure 3, the first switch described in the present embodiment is NPN type triode, the control end of described first switch is base stage, and the first end of described first switch is colelctor electrode, and the second end of described first switch is emitter stage.
Further, described level input is connected with the base stage of described NPN type triode by the first resistance, and the colelctor electrode of described NPN type triode is connected with power supply by the second resistance, the grounded emitter of described NPN type triode.
Preferably, as shown in Figure 4, second switch described in the present embodiment is N-type metal-oxide-semiconductor, and the control end of described second switch is grid, and the first end of second switch is drain electrode, and the second end of second switch is source electrode；Described 3rd switch is P type metal-oxide-semiconductor, and the control end of described 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 described N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor is connected with the colelctor electrode of NPN type triode, the drain electrode of described N-type metal-oxide-semiconductor is connected with the drain electrode of described P type metal-oxide-semiconductor, and the drain electrode of N-type metal-oxide-semiconductor connects described level output end, the source ground of described N-type metal-oxide-semiconductor, the source electrode of described P type metal-oxide-semiconductor connects power supply.
In above preferred embodiment, when level input input high level (such as, time 1.8-5V), NPN type triode is opened, linkage section output low level between second resistance and audion, thus P type metal-oxide-semiconductor is opened, N-type metal-oxide-semiconductor turns off, level output end connects power supply by P type metal-oxide-semiconductor, achieve the output of high level, the driving intensity exporting this electric current directly depends on the power supply capacity of power supply and the driving force of P type metal-oxide-semiconductor, make the driving intensity enhancing of the output electric current of level output end, can generally achieve an ampere even bigger, guarantee is provided for distant signal transmission.
Illustrating as one, first in the embodiment of the present invention switchs, second switch and the 3rd switchs can be relay.
A kind of improvement as above preferred embodiment, as shown in Figure 5, the described circuit for long-distance transmissions also includes a filter circuit, described filter circuit includes the first inductance, the first electric capacity and the second electric capacity, described first inductance is arranged between power supply and the second resistance, 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 first end of the second electric capacity, the second end of described first electric capacity and the second end ground connection of the second electric capacity.
It addition, described filter circuit can also use low pressure difference linear voltage regulator LDO to substitute the filter circuit of above-mentioned first inductance, the first electric capacity and the second electric capacity composition, have more excellent effect.
Wiegand signal mainly uses+5v to represent high level 1, GND represents low level 0, the digital signal exported directly is provided by the power supply of+5v, but in digital circuit, also it is+5v to the power supply of other equipment such as processor, processor electricity consumption is given after conversion, when processor and conversion chip work, power supply can be made to produce some literary composition ripple or noises, this type of literary composition ripple or noise can directly affect+5v the power quality powered, if power quality is bad, signal containing Wen Bo or noise can be exaggerated through transmission line, ultimately result in signal bust this, furthermore the speed of Wiegand signal transmission only several K, so needing filter away high frequency noise.The present embodiment constitutes a filter circuit (signal rate that the parameter of described first inductance, the first electric capacity and the second electric capacity can be transmitted as required is configured) by the first inductance, the first electric capacity and the second electric capacity, can effectively suppress and prevent the noise produced when processor and the work of other modules from entering transmission signal by power supply, further ensure the stability of signal transmission.
Another kind of improvement as above preferred embodiment; as shown in Figure 6; the described circuit for long-distance transmissions also includes a protection circuit; described protection circuit includes self-recoverage insurance and transient voltage suppressor; first end of described self-recoverage insurance connects level output end; second end of self-recoverage insurance connects the first end of described second switch, and the first end of described transient voltage suppressor connects the second end of self-recoverage insurance, the second end ground connection of described transient voltage suppressor.
When level output end receives the interference introducing high-voltage signal in the external world, this signal is by after the insurance of described self-recoverage, described transient voltage suppressor then can in instantaneous conducting, now flow through self-recoverage insurance and can produce a bigger electric current, after this electric current exceedes certain threshold value, self-recoverage insurance can directly disconnect, thus other devices avoided in circuit are subject to the harm of over-voltage and over-current.Under normal circumstances, if the interference of transmission line is excessive, holding wire then can produce bigger voltage pulsation, by above-mentioned protection circuit, it is possible to circuit to be played protection effect.
Further, as it is shown in fig. 7, the described circuit for long-distance transmissions also includes an anti-interference device, described anti-interference device is ferrite bean or the second inductance, and described anti-interference device is connected between the first end of second switch and self-recoverage insurance.
Further, as shown in Figure 8, the described circuit for long-distance transmissions also includes one the 3rd electric capacity, and the first end of described 3rd electric capacity connects the first end of second switch, the second end ground connection of the 3rd electric capacity.
High-frequency signal can be produced higher resistance by described anti-interference device such that it is able to effectively suppress the high flat noise of part, the interference such as reflection in absorption portion circuit, crosstalk.Described 3rd electric capacity is a decoupling capacitor, and this electric capacity is prevented from the switching noise that above-mentioned N-type metal-oxide-semiconductor and P type metal-oxide-semiconductor produce in the process of switch, it is prevented that the situation producing overshoot in the moment disconnected or close occurs.It addition, described anti-interference device and the 3rd electric capacity also constitute a filter circuit, further filter out the high-frequency noise on transmission line, thus being further ensured that the stability that signal transmits.
Another as above-described embodiment is improved, as it is shown in figure 9, the described circuit for long-distance transmissions also includes one the 3rd resistance, the first end of described 3rd resistance connects the control end of described first switch, the second end ground connection of the 3rd resistance.
Described 3rd resistance passes through drop-down ground connection, to described circuit initial signal when initial power-on is started working, and then level output end is low level under guarantee original state, prevent MCU initial launch in biological identification device unstable to the transmission signal condition of level input, equipment is caused the operation of some mistakes.
On the other hand, as shown in Figure 10, embodiments provide a kind of biological identification device, include arbitrary described circuit for long-distance transmissions in above-described embodiment.
Biological identification device described in the present embodiment includes a bio-identification unit and the described circuit for long-distance transmissions, the biological characteristic (such as fingerprint, face, iris, vocal print, palmmprint, referring to vein etc.) obtained is identified by described bio-identification unit, control signal is generated according to recognition result, this control signal generally MCU from bio-identification unit exports, the level input of the circuit for long-distance transmissions described in input above-described embodiment, and export from the level output end of described circuit.
In the present embodiment, by described circuit, it is high that described biological identification device has transmission signal quality, and by force, capacity of resisting disturbance is strong, the advantages such as protective capacities is strong for driving force.
Another further aspect, as shown in figure 11, embodiments provides a kind of bio-identification gate control system, including gate inhibition's controlled terminal, also includes above-mentioned biological identification device, and described level output end connects the input of gate inhibition's controlled end.
In the present embodiment, biological identification device is identified according to the biological characteristic (such as fingerprint, face, iris, vocal print, palmmprint, referring to vein etc.) obtained, control signal is generated according to recognition result, this control signal inputs the level input of the circuit for long-distance transmissions described in above-described embodiment, and export from the level output end of described circuit, it is connected by the input of transmission line with described gate inhibition's controlled terminal, gate inhibition's controlled terminal resolves according to the control signal of input, according to opening or closing that analysis result and then access control are locked.
In the present embodiment, by described circuit, it is high that described bio-identification gate control system has transmission signal quality, driving force is strong, capacity of resisting disturbance is strong, the advantages such as protective capacities is strong, solves the generation transmitting signal quality deformation and other problems that prior art causes because of the impact of transmission range.
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. the circuit for long-distance transmissions, it is characterised in that including:
Level input, first resistance, second resistance, first switch, second switch, 3rd switch and level output end, described level input is connected by the control end of the first resistance and the first switch, first end of described first switch is connected with power supply by the second resistance, second end ground connection of described first switch, first end of the first switch is connected with the control end of second switch and the 3rd switch respectively, first end of the first end of second switch and the 3rd switch connects, first end of second switch connects level output end, second end ground connection of second switch, second end of the 3rd switch is connected with power supply；
When described level input input low level, the first switch is off, and the 3rd switch is off, and second switch is in closure state；
When described level input input high level, the first switch is in closure state, and the 3rd switch is in closure state, and second switch is off.
2. the circuit for long-distance transmissions according to claim 1, it is characterized in that, described first switch is NPN type triode, and the control end of described first switch is base stage, first end of described first switch is colelctor electrode, and the second end of described first switch is emitter stage.
3. the circuit for long-distance transmissions according to claim 1, it is characterised in that described second switch is N-type metal-oxide-semiconductor, the control end of described second switch is grid, and the first end of second switch is drain electrode, and the second end of second switch is source electrode；Described 3rd switch is P type metal-oxide-semiconductor, and the control end of described 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.
4. according to the arbitrary described circuit for long-distance transmissions of claims 1 to 3, it is characterized in that, described circuit also includes a filter circuit, described filter circuit includes the first inductance, the first electric capacity and the second electric capacity, described first inductance is arranged between power supply and the second resistance, 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 first end of the second electric capacity, the second end of described first electric capacity and the second end ground connection of the second electric capacity.
5. according to the arbitrary described circuit for long-distance transmissions of claims 1 to 3; it is characterized in that; described circuit also includes a protection circuit; described protection circuit includes self-recoverage insurance and transient voltage suppressor; first end of described self-recoverage insurance connects level output end; second end of self-recoverage insurance connects the first end of described second switch, and the first end of described transient voltage suppressor connects the second end of self-recoverage insurance, the second end ground connection of described transient voltage suppressor.
6. the circuit for long-distance transmissions according to claim 5, it is characterized in that, described circuit further comprises anti-interference device, and described anti-interference device is ferrite bean or the second inductance, and described anti-interference device is connected between the first end of second switch and self-recoverage insurance.
7. the circuit for long-distance transmissions according to claim 6, it is characterised in that described circuit also includes one the 3rd electric capacity, the first end of described 3rd electric capacity connects the first end of second switch, the second end ground connection of the 3rd electric capacity.
8., according to the arbitrary described circuit for long-distance transmissions of claims 1 to 3, it is characterised in that described circuit also includes one the 3rd resistance, the first end of described 3rd resistance connects the control end of described first switch, the second end ground connection of the 3rd resistance.
9. a biological identification device, it is characterised in that include as arbitrary in claim 1 to 8 as described in the circuit for long-distance transmissions.
10. a bio-identification gate control system, including gate inhibition's controlled terminal, it is characterised in that described gate control system also includes biological identification device as claimed in claim 9, and described level output end connects the input of gate inhibition's controlled terminal.
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| 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 |
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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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| CN105809792A true CN105809792A (en) | 2016-07-27 |
| CN105809792B CN105809792B (en) | 2018-02-13 |
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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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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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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |