CN106054628A - Light-control intelligent control home system based on mobile terminal - Google Patents
Light-control intelligent control home system based on mobile terminal Download PDFInfo
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- CN106054628A CN106054628A CN201610413657.XA CN201610413657A CN106054628A CN 106054628 A CN106054628 A CN 106054628A CN 201610413657 A CN201610413657 A CN 201610413657A CN 106054628 A CN106054628 A CN 106054628A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2642—Domotique, domestic, home control, automation, smart house
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a light-control intelligent control home system based on a mobile terminal. The system comprises a central processor, a field-programmable gate array circuit, a power circuit, a photoelectric detection module, a switch circuit, a pre-amplifier, a main amplifier, a filter capacitor and a phase inverter. The power circuit is connected with the central processor and the field-programmable gate array circuit. The power circuit is internally provided with a solar cell panel, a voltage stabilizing circuit, a power source controller and a DC power supply circuit. Visible light communication is a point-to-point transmission mode and has the advantage of good security. A light key and a smart mobile terminal are combined, and thus an Android system can be applied to the development of mobile phone AAP light key software well; and the Android system is an open-source operating system based on Linux, and is mainly applied to the mobile terminal (a mobile phone or a tablet).
Description
Technical field
The present invention relates to Smart Home technical field, especially a kind of based on mobile terminal light-operated intelligent control house system.
Background technology
Smart Home is that Internet of Thingsization embodies under the impact of Internet of Things.Smart Home passes through technology of Internet of things by family
Various equipment are (such as audio & video equipment, illuminator, curtain control, airconditioning control, safety-protection system, Digital Theater System, network man
Electricity and three tables are made a copy for) connect together, it is provided that the control of home wiring control, Lighting control, curtain, remote control using telephone, indoor
Several functions and the means such as outer remote control, burglar alarm, environmental monitoring, HVAC control, infrared forwarding and programmable Timer control.
Compared with common household, Smart Home not only has traditional inhabitation function, has both building, network service, information household appliances, equipment
Automatization, collecting system, structure, services, manages efficient, comfortable, safe and convenient, the living environment of environmental protection being integrated, it is provided that complete
The information interactive function in orientation, helps family to keep communication for information unimpeded with outside, optimizes the life style of people, help people
Effectively arranging the time, strengthen the safety of life staying idle at home, the most various energy expenditures save fund.
Intelligent management (Intelligent Management is called for short IM) is artificial intelligence and managerial science, knowledge engineering
It is combined with each other, mutually with the technology multidisciplinary, many such as system engineering, computing technique and communication technology, soft project and information engineering
New technique, the new disciplines permeated and produce.How its research improves the level of intelligence of computer management system, and intelligence
The design theory of management system, method with realize technology.Intelligent management is the new trend of modern management science technology development.Intelligence
Management system is in management information system (Management Information System is called for short MIS), office automation system
System (Offece Au-tomation System is called for short OAS), DSS (Decision Support System, letter
Claim DSS) function is integrated, on the basis of Integration ofTechnology, application artificial taste intelligent system, knowledge engineering, pattern recognition, artificial
The methods such as neutral net and technology, carry out intellectuality, integrated, concert rationality, the computer management of a new generation that designs and realize
System.WIFI is easily by electromagnetic interference, and the direction of transmission is uncontrollable, and password is easily trapped.But visible light communication is a kind of
Point-to-point transmission mode, the advantage with good confidentiality.
Visible light communication technology, is that the high speed light and shade being invisible to the naked eye utilizing fluorescent lamp or light emitting diode etc. to send is dodged
Bright signal transmits information, is connected on illuminator by the wire device of high-speed Internet, and inserting attaching plug can make
With.The system utilizing this technology to make can cover the scope that indoor light reaches, and computer need not electric wire and connects, thus tool
There is DEVELOPMENT PROSPECT widely.
Summary of the invention
The goal of the invention of the present invention is, overcomes the deficiency of art methods, it is provided that a kind of by visible light communication technology
Apply to, in intelligent domestic system control, be combined together with illuminator by intelligent home control system, by controlling LED illumination
The break-make of lamp realizes the optical pickup apparatus of the LED illumination intelligence control system controlled domestic electric appliance in real time.
For achieving the above object, it is proposed that following technical scheme:
A kind of control house system based on mobile terminal light-operated intelligent, including Photoelectric Detection module, on-off circuit, preamplifier,
Main amplifier, filter capacitor, phase inverter, central processing unit, field programmable gate array, power circuit；Described hands central authorities
Processor connects optical key module；It is provided with intelligent mobile terminal in described optical key module, operates based on intelligent mobile terminal
System, designs key based on virtual serial port and sends the software module of intelligent mobile terminal, by the software of intelligent mobile terminal
Module sends out key information, and key information is exported by the min-USB mouth of intelligent mobile terminal；The key information exported,
Based on intelligent mobile terminal OTG function, in external drive module loading to LED, complete key information by LED
Transmission；Described power circuit connects central processing unit and field programmable gate array respectively；Set in described power circuit
It is equipped with solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit；LED according to signal instruction quick on-off,
Described Photoelectric Detection module quickly responds, and all receives connecting each time and is converted into the signal of telecommunication, is high level, and every
Secondary disconnection is low level, then by the on-off circuit of rear end, preamplifier, main amplifier, filter capacitor, phase inverter
Reason, exports stable square-wave signal for controlling household electrical appliance.
Described field programmable gate array, inside includes configurable logic blocks CLB, input/output module IOB and interior
Three parts of portion's line；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table is connected to one
The input of individual d type flip flop, trigger drives other logic circuits again or drives I/O, thus constituting and both can realize combination
Logic function can realize again the basic logic unit module of sequential logic function, and these intermodules utilize metal connecting line to interconnect
Or it is connected to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and is stored in
Value in memory cell determines the side of connection between logic function and each module of logical block or between module with I/O
Formula, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming.
Described Photoelectric Detection module is the double photodiode DPD structure utilizing well shielding substrate carrier；CMOS technology
In be used for realize the DPD anode and cathode that the ion implanting of source-drain area is used to form；Manufacture method is the making interdigital row of P+ in N well
Row electrode, and utilize N+ to spread exit well electrode, surrounded by P+ protection ring around N well.The arrangement of P+ interdigital structure is to increase
Width of depletion region and make depletion region electric field more uniform, is beneficial to more photo-generated carrier and does rapid drift motion.
Described Photoelectric Detection module output current is between 1.5 A to 3.5 A, and opens at closedown ceiling light source and curtain
Natural light irradiation under have the output of about 0.2 A.Sent key is that TTL level signal, i.e.+5V represent high level " 1 ",
0V represents low level " 0 "；Based on TTL signal level feature, select low cost, small size PNP type paster audion
S8550 and related peripheral device thereof, constitute LED drive circuit；Optical key is to design based on single-chip microcomputer STC12C2052AD
A kind of transmitting terminal；Optical key can send different keys, and described optical key module is not a simple man-to-man dress
Put, but the device of an one-to-many.
An on-off circuit is added between described Photoelectric Detection module and amplifying circuit.
Described on-off circuit includes that P-channel enhancement type metal-oxide-semiconductor M1 and N-channel enhancement mode metal-oxide-semiconductor M2 forms the first phase inverter；
P-channel enhancement type metal-oxide-semiconductor M3 and N-channel enhancement mode metal-oxide-semiconductor M4 forms the second phase inverter；N-channel enhancement mode metal-oxide-semiconductor M5 and P ditch
Road enhancement mode metal-oxide-semiconductor M6 forms cmos transmission gate;It is defeated that a end connection Photoelectric Detection module exports, b end connects rear end amplifying circuit
Enter.
In visible ray receiver, detector sensing optical signal, the current pulse signal of output magnitude.And preamplifier, use
In this current signal is converted into voltage signal, and it is amplified；Described preamplifier is trans-impedance amplifier, described puts across resistance
Big device constitutes parallel voltage negtive backword structure by being connected across the feedback resistance of input and outfan.It has input resistance
Little, introduce that noise is little, wave distortion is little, bandwidth is relatively big, dynamic range is relatively big and stability advantages of higher and need not equilibrium electricity
Road.
Described trans-impedance amplifier is constituted RGC structure by M1, M2, R1, R2, R3, is then three grades of common-source amplifier cascades,
Finally output employs one-level common drain stage amplifier (source follower) as buffer stage；Across resistance Rf be connected to LINE1 Yu LINE2 it
Between.
Going here and there across resistance R and on-off circuit on resistance amplifying circuit, opening before on-off circuit therein and trans-impedance amplifier
Pass circuit is the same.And in order to meet stable voltage output, it is designed with six groups of difference resistances R with described on-off circuit also simultaneously
Connection, they are respectively 1 K Ω, 5K Ω, 10K Ω, 20K Ω, 50K Ω, 100 K Ω；When to select one of them across resistance, by this
The SEL of individual resistance switch circuit connects power supply, and remaining 5 groups of on-off circuit all ground connection can realize.Described six across resistance can guarantee that across
Impedance amplifier all can obtain preferably output in the wide input range of 1 A to 20 A.
Described main amplifier is made up of 4 basic difference unit direct-couplings, and has imbalance in output to input connection
Compensate loop, to make up not mating between cmos device and between resistance device, it is ensured that the normal work of circuit.
Described main amplifier also includes a difference unit, described difference unit, exports for double-width grinding both-end.Due to integrated
The components and parts symmetry of circuit is relatively preferable, so the signal of both-end output is similar to the most contrary preferable differential mode equal in magnitude
Signal, is preferable input to next stage amplifier.But for first order amplifier, trans-impedance amplifier is single before
End output, have employed simple high-pass filtering circuit at the two poles of the earth when connecting, one is to filter DC component, and two is will to put across resistance
Big device is independent with main amplifier, makes some low frequency noise component introduced in trans-impedance amplifier will not be in main amplifier
It is exaggerated.And wherein one end input of filtered AC compounent access differential unit, the other end provides identical direct current biasing,
Make two pipes reach symmetrical, and open simultaneously, because differential amplifier output of amplifier in the case of double-width grinding
It is directly proportional to the difference of two input signals, and size own with input voltage is unrelated, so thus by trans-impedance amplifier
Single-end output has transferred one group of preferable differential wave after one-level difference to be continued to amplify for rear end difference unit.
Described optical pickup apparatus also includes that offset compensation loop, described offset compensation loop are RC low-pass filtering negative feedbacks,
Access RC low-pass filtering negative feedback in output with input, eliminate AC signal, utilize negative feedback that input is compensated simultaneously,
Reduce circuit to process deviation and the sensitivity of environmental change as far as possible.
Described outfan also includes that a phase inverter, first signal, after main amplifier amplifies, finally export for both-end, choosing
Select wherein one end output connection one coupling electric capacity DC component to be leached, retain the high-frequency signal after amplifying, then by this signal
Connect a phase inverter to export again.
A kind of LED illumination intelligent house network system utilizing above-mentioned optical pickup apparatus, including an access controller, even
It is connected to external network；Multiple White-light LED illumination light sources are connected to access controller；Multiple optical detectors, are connected to access control
Device processed；Individual adapter；And multiple subscriber equipment, it is connected to multiple adapter, and carries out data by the plurality of adapter
Transmission and reception.Described access controller and adapter all include an optical wireless communication protocol module, this optics
Wireless communication protocol module control Frame from the downlink of white light LED illumination light source to adapter and from adapter to
The up-link of optical detector is transmitted.Described access controller is used for driving White-light LED illumination light source and optics to visit
Survey device, it is achieved electrical signal is mutually changed with optical signalling, and described access controller possesses and connects with external network data communication
Mouthful, perform data transfer control protocol.Described adapter has a transmitting light source and optical detector, and can drive and self have
Transmitting light source and optical detector, possess and different user devices exchange data interface, perform data transfer control protocol.
The transmitting light source that described adapter has is LED or the laser instrument meeting eye-safe standard.The transmitting that described adapter has
Light source, its optical signalling launched at least covers an optical detector being connected with access controller.Described adaptive utensil
Some optical detectors are at least in the coverage of a White-light LED illumination light source optical signal.
In the downlink, access controller receives the instruction of remote subscriber by external network, and produces control according to instruction
Signal processed.Through being obtained RS-485 signal by USB-RS485 modular converter after control signal coding, then by modulation circuit by signal
It is loaded on lighting source and realizes visible ray broadcast.Receiving demodulating end, adapter photodetector realizing photosignal and turn
Changing, photosignal is signal through the amplification of signal, filtering, shaping, demodulation regeneration reducing, and this signal can be directly by single-chip microcomputer
Read, be reduced into control signal, complete the control to various electrical equipment.And in the uplink, when equipment has data to send,
Its data process through the adapter connected, and according to certain rule, are launched by the light source of adapter sometime.It is subject to
Being limited to power consumption and eye-safe sex chromosome mosaicism, the light source power of adapter is less, directivity is stronger.The transmitting of equipment can not be by equipment
Monitoring with perception, the optical detector that can only be access in controller connection receives.After access controller captures signal, immediately
The white-light illuminating light source that data is connected through forwards, at this moment equipment and receive this forward signal, then knows up channel
Occupied.Lighting source and optical detector that access controller connects have a bigger coverage, and the connecing of access controller
Receive forwarding mechanism and ensure that the channel-monitoring of the interior each access user equipment of net.
This beneficial effect of the invention:
In semiconductor lighting intelligent domestic system, photoreceiver is a module that is indispensable and that can use in a large number.
Method and the technology such as application artificial taste intelligent system, knowledge engineering, pattern recognition, artificial neural network, carried out
Intelligent, integrated, concert rationality, the computer management system of a new generation designing and realizing.WIFI, easily by electromagnetic interference, passes
Defeated direction is uncontrollable, and password is easily trapped.But visible light communication is a kind of point-to-point transmission mode, has confidentiality
Good advantage.
Optical key and intelligent mobile terminal combine, and android system can well be used to develop mobile phone A AP light key
Software, android system is the operating system increased income based on Linux, be mainly used in mobile terminal (mobile phone and
Flat board) in.Android system is compared with other system platform, has the biggest advantage.Its advantage is topmost is embodied in it
Opening.Android system is the system increased income completely, and all of fan and manufacturer can participate in Android
The exploitation of system, this just development for Android system laid fine basis.Android system has become as
The system that whole world installation amount first is big.Another big advantage of Android system is namely based on the platform of Google, and Google is public
The service products such as the map of department, search, mailbox, it is possible to seamless is applied in Andriod system.
Described field programmable gate array, inside includes configurable logic blocks CLB, input/output module IOB
With three parts of interconnector；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table connects
To the input of a d type flip flop, trigger drives other logic circuits again or drives I/O, thus constitutes and both can realize
Combination logic function can realize again the basic logic unit module of sequential logic function, and these intermodules utilize metal connecting line mutual
It is coupled or attached to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and deposits
Storage value in a memory cell determines coupling between logic function and each module of logical block or between module with I/O
Mode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；To better implement the present invention,
Disclosure satisfy that and make solar energy carry out generating electricity not or still meet when night whole system is powered in illuminance
In use, unnecessary electric energy will be stored in accumulator battery, and occur solar illuminating not or rainy weather or
During night, accumulator battery will carry out releasing electricity, and is delivered in DC power-supply circuit by the output circuit of power-supply controller of electric, centering
Central processor and field programmable gate array are powered, and reach 24 hours round-the-clock to make whole system work.
Existing detector and amplifying circuit be enough to constitute simple photoreceiver and support the fortune of intelligent domestic system
OK, but owing to the volume of multiple module assembleds is relatively big, and less stable, when can cause inconvenience when installing and signal transmission
High bit-error, cause the stability of system to be substantially reduced.The optical pickup apparatus of the present invention 0.18 mCMOS technique, will
Photoelectric Detection module, trans-impedance amplifier, main amplifier are integrated in a piece of chip；And can in order to adapt to the electrical appliance of differing heights
The light of the varying strength that can receive, is designed as the variable gain amplifier having 6 kinds of differences across resistance by trans-impedance amplifier.For
The requirement that intelligent domestic system is special, in circuit design the outfan of whole photoreceiver bold to have employed phase inverter defeated
Go out, greatly reduce the multiple that amplifying circuit needs to amplify, make the complexity of circuit be greatly reduced.
Accompanying drawing explanation
Fig. 1 is optical pickup apparatus structural representation；
Fig. 2 is switching circuit structure schematic diagram；
Fig. 3 is across resistance amplification circuit diagram；
Fig. 4 is RGC circuit structure diagram；
Fig. 5 is to connect circuit diagram across resistance；
Fig. 6 is main amplifier structural representation；
Fig. 7 is difference unit circuit diagram；
Fig. 8 is inverter circuit figure；
Fig. 9 is LED illumination intelligent house network system structural representation.
Detailed description of the invention
Below in conjunction with the accompanying drawings the one of the present invention is made the most detailed based on mobile terminal light-operated intelligent control house system
Describe:
As it is shown in figure 1, one based on mobile terminal light-operated intelligent control house system, including Photoelectric Detection module, on-off circuit,
Preamplifier, main amplifier, filter capacitor, phase inverter, central processing unit, field programmable gate array, power circuit；
Described hands central processing unit connects optical key module；It is provided with intelligent mobile terminal, based on Intelligent sliding in described optical key module
Dynamic terminal operating system, designs key based on virtual serial port and sends the software module of intelligent mobile terminal, pass through intelligent mobile
The software module of terminal sends out key information, and key information is exported by the min-USB mouth of intelligent mobile terminal；Exported
Key information, based on intelligent mobile terminal OTG function, in external drive module loading to LED, is completed by LED
The transmission of key information；Described power circuit connects central processing unit and field programmable gate array respectively；Described power supply
Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in circuit；LED is according to signal instruction
Quick on-off, described Photoelectric Detection module quickly responds, and all receives connecting each time and is converted into the signal of telecommunication, being height
Level, and disconnect every time and be low level, then by the on-off circuit of rear end, preamplifier, main amplifier, filter capacitor,
Phase inverter processes, and exports stable square-wave signal for controlling household electrical appliance.
Described field programmable gate array, inside includes configurable logic blocks CLB, input/output module IOB
With three parts of interconnector；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table connects
To the input of a d type flip flop, trigger drives other logic circuits again or drives I/O, thus constitutes and both can realize
Combination logic function can realize again the basic logic unit module of sequential logic function, and these intermodules utilize metal connecting line mutual
It is coupled or attached to I/O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and deposits
Storage value in a memory cell determines coupling between logic function and each module of logical block or between module with I/O
Mode, and finally determine the function achieved by FPGA, FPGA allows unlimited number of programming；To better implement the present invention,
Disclosure satisfy that and make solar energy carry out generating electricity not or still meet when night whole system is powered in illuminance
In use, unnecessary electric energy will be stored in accumulator battery, and occur solar illuminating not or rainy weather or
During night, accumulator battery will carry out releasing electricity, and is delivered in DC power-supply circuit by the output circuit of power-supply controller of electric, centering
Central processor and field programmable gate array are powered, and reach 24 hours round-the-clock to make whole system work.
Preferably, described Photoelectric Detection module is the double photodiode DPD structure utilizing well shielding substrate carrier；
CMOS technology is used for realize the DPD anode and cathode that the ion implanting of source-drain area is used to form；Manufacture method is to make in N well
P+ interdigital arrangement electrode, and utilize N+ to spread exit well electrode, surrounded by P+ protection ring around N well.The arrangement of P+ interdigital structure is
In order to increase width of depletion region and make depletion region electric field more uniform, it is beneficial to more photo-generated carrier and does rapid drift fortune
Dynamic.
Described Photoelectric Detection module is different to light source distance, necessarily causes exporting electric current different.From the minimum network media
Player is to the highest desk-top air-conditioning top, and described Photoelectric Detection module output current is between 1.5 A to 3.5 A, and is closing
Close ceiling light source and under natural light irradiation that curtain is opened, have the output of about 0.2 A.
As long as owing to Photoelectric Detection module is in the environment of having light, photogenerated current all can be had to export, the technical program is to adopt
Single chip integrated, if detector is directly connected with rear end amplifying circuit, then will have all the time electric current export to back-end circuit,
Although the connecting tube not having DC source will not work, but the parameter of pipe can be produced by long-time and uneven small area analysis unavoidably
Impact, when first pipe parameter generation minor variations, amplifies, through back-end circuit, the error produced and is probably huge；So be
Avoid the generation of this situation, between described Photoelectric Detection module and amplifying circuit, add an on-off circuit.
As in figure 2 it is shown, described on-off circuit includes that P-channel enhancement type metal-oxide-semiconductor M1 and N-channel enhancement mode metal-oxide-semiconductor M2 forms
First phase inverter；P-channel enhancement type metal-oxide-semiconductor M3 and N-channel enhancement mode metal-oxide-semiconductor M4 forms the second phase inverter；N-channel enhancement mode
Metal-oxide-semiconductor M5 and P-channel enhancement type metal-oxide-semiconductor M6 forms cmos transmission gate;A end connects the output of Photoelectric Detection module, b end connects rear end
Amplifying circuit inputs.
When SEL connects a low level, supply voltage VDD can be become after inverted device 1 and be directly connected to the base stage of M6 pipe, should simultaneously
Gao Pingzai becomes low level through phase inverter 2 and accesses the base stage of M5 pipe.As long as the input of a end changes between 0-VDD, then M5, M6 are
Cut-off, transmission gate is closed, and i.e. closes circuit and disconnects, and no current flows into rear end amplifying circuit.And when SEL connects a high level, through anti-
Can become low level after phase device 1 and be directly connected to the base stage of M6 pipe, this low level becomes power supply electricity through phase inverter 2 more simultaneously
Pressure VDD accesses the base stage of M5 pipe.Now setting the input voltage of a end as the cut-in voltage of V1, M5 is VNCut-in voltage be M6.When
0<V1<VDD-VNTime, M5 is turned on；And when VP< V1 < during VDD, M6 conducting.Therefore, when V1 changes between 0-VDD, M5,
M6 at least one be conducting, make to be rendered as between a and b low resistance state, transmission gate turns on, i.e. on-off circuit is opened.
Described on-off circuit purpose is to prevent current source sources from constantly impacting rear end amplifying circuit, but for high-speed communication electricity
Road, the addition of each little module must take into his impact on integrated circuit.Owing to the conducting resistance of CMOS is the most little
(typically smaller than 1K Ω, the in addition symmetrical structure of M5, M6 can reduce the conducting resistance of transmission gate, further so transmission gate is to electricity
The transmission characteristic on road does not have big impact, regardless of whether be transmission gate or the frequency domain characteristic of the phase inverter amplification electricity than rear end
Road is the most much better, so also there is no concern that the addition of on-off circuit affects the bulk velocity of circuit.
Owing to inevitably having the existence of certain natural light in general room, so disconnecting when light source sends signal
Moment also have the output of faint electric current, so the amplification of amplifier must strictly control in rational scope, should
Meeting the control that the amplification of high level be enough to drive external circuit to household electrical appliance, low level to be avoided is same defeated after amplifying
Go out end to reach cut-in voltage and make signal entanglement.
In visible ray receiver, detector sensing optical signal, the current pulse signal of output magnitude.And preposition amplification
Device, for this current signal is converted into voltage signal, and is amplified；As it is shown on figure 3, described preamplifier is to put across resistance
Big device, described trans-impedance amplifier constitutes parallel voltage negtive backword structure by being connected across the feedback resistance of input and outfan.
It has, and input resistance is little, noise is little, wave distortion is little in introducing, bandwidth is relatively big, dynamic range is relatively big and stability advantages of higher
And need not equalizing circuit.
As shown in Figure 4, described trans-impedance amplifier is constituted RGC structure by M1, M2, R1, R2, R3, is then three grades of common sources
Amplifier cascades, and finally output employs one-level common drain stage amplifier (source follower) as buffer stage；It is connected to across resistance Rf
Between LINE1 and LINE2.
Because present transmission of visible light speed also ratio is relatively low, can not show a candle to use other optic communications such as fiber-optic transfer of laser
Speed, and in single-chip integration and variable gain, not the main amplifying unit of trans-impedance amplifier described in high-speed channel is the simplest
The cascade of the most direct single common-source stage amplifier.
As it is shown in figure 5, going here and there across resistance R and on-off circuit on resistance amplifying circuit, on-off circuit therein is put with across resistance
On-off circuit before big device is the same.And in order to meet stable voltage output, be designed with six groups of difference resistances R simultaneously and open with described
Closing circuit in parallel, they are respectively 1 K Ω, 5K Ω, 10K Ω, 20K Ω, 50K Ω, 100 K Ω；When to select one of them across
During resistance, the SEL of this resistance switch circuit being connect power supply, remaining 5 groups of on-off circuit all ground connection can realize.Described six across resistance
Can guarantee that trans-impedance amplifier all can obtain preferably output in the wide input range of 1 A to 20 A.
Although the preamplifier of receiver has served the effect amplifying voltage, but its major function is to be believed by electric current
Number being converted into voltage signal, amplification is relative the least, and output voltage is also far from satisfied driving terminator.So this
Time the main amplifier being specifically designed to amplification will be had further voltage to be amplified, with reach export requirement.
As shown in Figure 6, described main amplifier is made up of 4 basic difference unit direct-couplings, and in output to input
Connect and have offset compensation loop, to make up not mating between cmos device and between resistance device, it is ensured that the normal work of circuit
Make.
This at different levels between in direct-coupled amplification mode, the state of amplifiers at different levels is not separate the most not shadow
Ring, but mutually pin down, this not only makes state at different levels be difficult to adjust, the problem that there is also inter-stage electrical arrangement.But this
The relatively good solution of individual problem, and scabrous problem is Zero drift in main amplifier.So-called null offset, refers to
Input not plus signal when, due to the impact of the extraneous factor such as temperature, supply voltage, output voltage is made to be not zero, and
It it is the phenomenon drifted about up and down in null value.In null offset, the drift phenomenon especially caused with temperature is the most serious, is referred to as temperature
Drift.Temperature floats in this direct conjunction amplifier, and the drift that previous stage produces can be brought in next stage and be exaggerated, particularly
Produced by first order amplifier, temperature drift is maximum on the impact of circuit, and if the gain of amplifier is the biggest, impact will be got over
Greatly.Especially under low voltage environment, signal intensity is inherently little, and the impact of null offset just becomes apparent from.So reducing zero
Point drift is to ensure that the normally problem that have to consider of design circuit output.And differential amplifier solves zero point just
The maximally effective scheme of drifting problem.Especially because the matching of components and parts is fairly good in integrated circuit, it is more suitable for this electricity
Road form.
As shown in Figure 8, described basic difference unit, export for double-width grinding both-end.Components and parts pair due to integrated circuit
Title property is relatively preferable, so the signal of both-end output is similar to the most contrary preferable difference mode signal equal in magnitude, to next stage
Amplifier is preferable input.But for first order amplifier, trans-impedance amplifier is Single-end output, at the two poles of the earth before
Have employed simple high-pass filtering circuit during connection, one is to filter DC component, and two is by trans-impedance amplifier and main amplification
Device is independent, makes some low frequency noise component introduced in trans-impedance amplifier will not be exaggerated in main amplifier.And filter
Wherein one end input of the AC compounent access differential unit after ripple, the other end provides identical direct current biasing, makes two pipes
Reach symmetrical, and open simultaneously, because the differential amplifier output of amplifier and two inputs in the case of double-width grinding
The difference of signal is directly proportional, and size own with input voltage is unrelated, so thus by the Single-end output warp of trans-impedance amplifier
Transfer one group of preferable differential wave after one-level difference to continue to amplify for rear end difference unit.
And the existence of M3 pipe is the current source as fixed-bias transistor circuit, provide more constant electric current for differential amplifier, because of
Fine as current source stability for CMOS, differential amplifier can be made to have higher common mode rejection ratio, preferably suppression common mode letter
Number.
Owing to temperature is floated, and technique produce error, the existence of the factors such as environment, the DC voltage of circuit can be made to produce
Raw skew, after amplifying step by step, it is likely that makes the pipe of rear end differential amplifier circuit enter cut-off region or saturation region, makes
Whole main amplifier or even whole photoreceiver cannot normally work.So to the compensation of offset voltage very important.Imbalance
Compensating loop is to utilize the low-pass filtering negative feedback of simple R C.Its principle is to access RC low-pass filtering at output and input to bear anti-
Feedback, eliminates AC signal, utilizes negative feedback to compensate input simultaneously, reduces circuit to process deviation and environmental change as far as possible
Sensitivity.
Described outfan also includes that a phase inverter, first signal, after main amplifier amplifies, finally export for both-end, choosing
Select wherein one end output connection one coupling electric capacity DC component to be leached, retain the high-frequency signal after amplifying, then by this signal
Connect a phase inverter to export again.
Both-end export in select correct one end, be not any one end can because two output signals are sizes
The signal that equal direction is contrary, namely phase contrast is 180 °, and rear end phase inverter can be additionally provided the phase contrast of 180 °, so this
In the output port that selects should be consistent with the signal phase starting most the sensing of Photoelectric Detection module, otherwise inversion signal exports
Terminal appliance, may be more than likely complete different instructions or has no reaction at all.
Wherein M1 is P-channel enhancement type metal-oxide-semiconductor, and M2 is N-channel enhancement mode metal-oxide-semiconductor.When input is for high level, M1 cuts
Only, M2 turns on, and output is approximately 0；When input is for low level, M2 ends, and M1 turns on, and output is approximately VDD, but when input
Level be VDD about 2 certain limit time, may result in two pipes and be switched on, output voltage is between 0 and VDD
Value, this is disadvantageous, so must assure that rational amplification in the design of the circuit of front end, can not allow nature light etc.
Factor transmit data time produce the amplified cut-in voltage reaching M2 of electric current, can not allow transmission data 0 time signal
The amplified certain value that do not reaches makes 1 unlatching.Therefore, a phase inverter finally it is provided with.
After accessing phase inverter, the requirement of front-end circuit amplification can be substantially reduced, as long as high level is amplified to
About more than 1.3V, i.e. can ensure that inverters work, in perfect condition, can export preferable low level.And the fall of amplification
Low also make the amplified meeting of low level smaller, pipe M2 will not be made to open, export ideal close to power supply after inverted device
The high level of voltage.The access of phase inverter makes circuit need not the biggest amplification, just can export smoother close
In the square wave of 0V, 1.8V, the design complexity of circuit is made to be substantially reduced.
As it is shown in figure 9, a kind of LED illumination intelligent house network system utilizing above-mentioned optical pickup apparatus, connect including one
Enter controller 1, be connected to external network 6；Multiple White-light LED illumination light sources 2 are connected to access controller 1；Multiple optical detections
Device 3, is connected to access controller 1；And multiple subscriber equipment 5, it is connected to multiple adapter 4, and by the plurality of adaptation
Device carries out transmission and the reception of data.Described access controller and adapter all include an optical wireless communication agreement mould
Block, this optical wireless communication protocol module control Frame from the downlink of white light LED illumination light source to adapter and
It is transmitted in adapter to the up-link of optical detector.Described access controller is used for driving White-light LED illumination light
Source and optical detector, it is achieved electrical signal is mutually changed with optical signalling, and described access controller possesses and external network
Data communication interface, performs data transfer control protocol.Described adapter has transmitting light source and optical detector, and can drive
The dynamic transmitting light source self having and optical detector, possess and the interface of different user devices exchange data, perform data and pass
Transport control protocol is discussed.The transmitting light source that described adapter has is LED or the laser instrument meeting eye-safe standard.Described adapter
The transmitting light source having, its optical signalling launched at least covers an optical detector being connected with access controller.Institute
State optical detector that adapter has at least in the coverage of a White-light LED illumination light source optical signal.
In the downlink, access controller receives the instruction of remote subscriber by external network, and produces control according to instruction
Signal processed.Through being obtained RS-485 signal by USB-RS485 modular converter after control signal coding, then by modulation circuit by signal
It is loaded on lighting source and realizes visible ray broadcast.Receiving demodulating end, adapter photodetector realizing photosignal and turn
Changing, photosignal is signal through the amplification of signal, filtering, shaping, demodulation regeneration reducing, and this signal can be directly by single-chip microcomputer
Read, be reduced into control signal, complete the control to various electrical equipment.And in the uplink, when equipment has data to send,
Its data process through the adapter connected, and according to certain rule, are launched by the light source of adapter sometime.It is subject to
Being limited to power consumption and eye-safe sex chromosome mosaicism, the light source power of adapter is less, directivity is stronger.The transmitting of equipment can not be by equipment
Monitoring with perception, the optical detector that can only be access in controller connection receives.After access controller captures signal, immediately
The white-light illuminating light source that data is connected through forwards, at this moment equipment and receive this forward signal, then knows up channel
Occupied.Lighting source and optical detector that access controller connects have a bigger coverage, and the connecing of access controller
Receive forwarding mechanism and ensure that the channel-monitoring of the interior each access user equipment of net.Optical key and intelligent mobile terminal combine, permissible
Well using android system exploitation mobile phone A AP light key software, android system is based on Linux one and increases income
Operating system, be mainly used in mobile terminal (mobile phone and flat board).Android system and other system platform phase
Ratio, has the biggest advantage.The topmost opening being embodied in it of its advantage.Android system is the system increased income completely,
All of fan and manufacturer can participate in the exploitation of Android system, this just for Android system send out
Fine basis has been laid in exhibition.Android system has had become as the system that global installation amount first is big.Android system
Another big advantage is namely based on the platform of Google, the service product such as the map of Google, search, mailbox, it is possible to seamless
Be applied in Andriod system.
Above in conjunction with accompanying drawing, embodiments of the invention are described, but the invention is not limited in above-mentioned concrete
Embodiment, above-mentioned detailed description of the invention is only schematic rather than restrictive, those of ordinary skill in the art
Under the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, it may also be made that a lot
Form, within these belong to the protection of the present invention.
Claims (10)
1. one kind controls house system based on mobile terminal light-operated intelligent, it is characterised in that include that central processing unit, scene can be compiled
Journey gate-array circuit, power circuit, Photoelectric Detection module, on-off circuit, preamplifier, main amplifier, filter capacitor, anti-phase
Device；Described hands central processing unit connects optical key module；It is provided with intelligent mobile terminal, based on intelligence in described optical key module
Mobile terminal operating system, designs key based on virtual serial port and sends the software module of intelligent mobile terminal, pass through Intelligent sliding
The software module of dynamic terminal sends out key information, and key information is exported by the min-USB mouth of intelligent mobile terminal；Exported
Key information, based on intelligent mobile terminal OTG function, in external drive module loading to LED, come by LED
Become the transmission of key information；Described power circuit connects central processing unit and field programmable gate array respectively；Described electricity
Solar panel, mu balanced circuit, power-supply controller of electric and DC power-supply circuit it is provided with in source circuit；LED refers to according to signal
Making quick on-off, described Photoelectric Detection module quickly responds, and all receives connecting each time and is converted into the signal of telecommunication, being
High level, and disconnect every time and be low level, then by the on-off circuit of rear end, preamplifier, main amplifier, filtered electrical
Hold, phase inverter processes, and exports stable square-wave signal for controlling household electrical appliance.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Field programmable gate array, inside includes configurable logic blocks CLB, input/output module IOB and interconnector three
Individual part；FPGA utilizes small-sized look-up table (16 × 1RAM) to realize combination logic, and each look-up table is connected to a d type flip flop
Input, trigger drives other logic circuits again or drives I/O, thus constitute not only can realize combination logic function but also
Can realize the basic logic unit module of sequential logic function, these intermodules utilize metal connecting line interconnect or be connected to I/
O module；The logic of FPGA loads programming data by internally static storage cell and realizes, and is stored in memory cell
In value determine the connecting mode between logic function and each module of logical block or between module and I/O, and finally determine
Having determined the function achieved by FPGA, FPGA allows unlimited number of programming.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Photoelectric Detection module output current is between 1.5 A to 3.5 A, and the natural light irradiation opened at closedown ceiling light source and curtain
Under have the output of about 0.2 A；Sent key is that TTL level signal, i.e.+5V represent high level " 1 ", and 0V represents low level
“0”；Based on TTL signal level feature, select outside the Pass low cost, small size PNP type paster audion S8550 and phase thereof
Peripheral device, constitutes LED drive circuit；Optical key is a kind of transmitting terminal based on single-chip microcomputer STC12C2052AD design；Light
Key can send different keys, and described optical key module is not a simple man-to-man device, but one a pair
Many devices.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
On-off circuit includes that P-channel enhancement type metal-oxide-semiconductor M1 and N-channel enhancement mode metal-oxide-semiconductor M2 forms the first phase inverter；P-channel enhancement type
Metal-oxide-semiconductor M3 and N-channel enhancement mode metal-oxide-semiconductor M4 forms the second phase inverter；N-channel enhancement mode metal-oxide-semiconductor M5 and P-channel enhancement type MOS
Pipe M6 forms cmos transmission gate;A end connects the output of Photoelectric Detection module, b end connects rear end amplifying circuit input.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Preamplifier is trans-impedance amplifier, and described trans-impedance amplifier constitutes electricity by being connected across the feedback resistance of input and outfan
Pressure Shunt negative feedback structure.
One the most according to claim 5 based on mobile terminal light-operated intelligent control house system, it is characterised in that across
It is provided with six groups of difference resistances R in parallel with described on-off circuit, respectively 1 K Ω, 5K Ω, 10K Ω, 20K on resistance amplifying circuit
Ω、50KΩ、100 KΩ；When to select one of them across resistance, the SEL of this resistance switch circuit is connect power supply, remaining 5 groups
On-off circuit all ground connection can realize；Across resistance, described six can guarantee that trans-impedance amplifier is in the wide input range of 1 A to 20 A
All can obtain preferably output.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Main amplifier is made up of four basic difference unit direct-couplings, and has offset compensation loop in output to input connection.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Main amplifier also includes a difference unit, described difference unit, exports for double-width grinding both-end.
One the most according to claim 1 controls house system based on mobile terminal light-operated intelligent, it is characterised in that described
Offset compensation loop is RC low-pass filtering negative feedback, accesses RC low-pass filtering negative feedback in output with input, eliminates exchange letter
Number；Described outfan also include one anti-phase.
10. the LED illumination intelligence of the optical pickup apparatus of the LED illumination intelligence control system utilized described in above-mentioned any one of 1-9
Energy household network system, it is characterised in that include an access controller, be connected to external network；Multiple White-light LED illumination light
Source is connected to access controller；Multiple optical detectors, are connected to access controller；Individual adapter；And multiple subscriber equipment,
It is connected to multiple adapter, and is carried out transmission and the reception of data by the plurality of adapter；Described access controller is with suitable
All including an optical wireless communication protocol module in orchestration, this optical wireless communication protocol module controls Frame and is making clear one's meaning and position
Light LED illumination light source to the downlink of adapter and is transmitted in adapter to the up-link of optical detector；
Described access controller is used for driving White-light LED illumination light source and optical detector, it is achieved electrical signal is mutual with optical signalling
Change, and described access controller possesses and external network data communication interface, perform data transfer control protocol；Described adaptation
Utensil has transmitting light source and optical detector, and can drive the transmitting light source and optical detector self having, possess with not
With the interface of user equipment exchange data, perform data transfer control protocol；The transmitting light source that described adapter has is to meet
The LED of eye-safe standard or laser instrument；The transmitting light source that described adapter has, its optical signalling launched at least covers
One optical detector being connected with access controller；The optical detector that described adapter has is at least at a white light LEDs
In the coverage of lighting source optical signalling.
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| CN201610413657.XA CN106054628A (en) | 2016-06-14 | 2016-06-14 | Light-control intelligent control home system based on mobile terminal |
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